EPA530-R-92-001
a EPA
United States
Environmental Protection
Agency
Office of
Solid Waste and
Emergency Response
DIRECTIVE NUMBER: 9541.00-14
TITLE: State Programs Advisory Number Nine
APPROVAL DATE: January 8, 1992
EFFECTIVE DATE: Ja™ary 8, 1992
Office of Solid Waste
ORIGINATING OFFICE: permits and State Programs Division
State and Regional Programs Branch
Regional Coordination and Implementa
tion Section
X
FINAL
DRAFT
STATUS:
D A - Pending OMB Approval
CD B - Pending AA-OSWER Approval
REFERENCE (Other Documents):
Updates State Authorization Manual 9540.00-09A
OSWER OSWEr OSWER OSWER
DIRECTIVE DIRECTIVE DIRECTIVE
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EPA530-R-92-001
United States fcnvironmentai Protection Agency
Washington. DC 204SO
OSWER Directive Initiation Request
1. Directive Number
9541.00-14
2. Originator Information
Mail Code
OS-342
Offict
PSPD/SPB/BCIS
Telephone Code
260-9656
3. Title
State Programs Advisory Number Nine
4. Summary of Directive (include brief statement of purpose)
Updates State Authorization Manual, which replaced the State Consolidated
Authorization Manual. This SPA #9 covers PCRA program changes for the period
January 1 through June 30, 1990. Included are nine new revision checklists and
ten revised existing checklists. A consolidated land disposal restrictions
checklist is also included.
5. Keywords
State Programs/Advisory
6a. Does This Directive Supersede Previous Directive(s)?
b. Does It Supplement Previous Directive(s)?
No
No
Yes What directive (number, title)
Yes What directive (number, title)
State Authorization Manual
7. Draft Level
A - Signed by AA/DAA
B - Signed by Office Director
C - For Review & Comment
D - In Development
8. Document to be distributed to States by Headquarters?
x
Yes
No
This Request Meets OSWER Directives System Format Standards.
9. Signature of Lead Office Directives Coordinate^
(j&*nutfJ ^J Jje*f~0***&
18»-fSSme(|ind Title of Approving Official
Sylvia K. Lowrance, Director, Office of Solid Waste
Date
1/22/92
Date
1/8/92
EPA Form 1315-17 (Rev, S-87) Previous editions are obsolete.
OSWER OSWER OSWER 0
VE DIRECTIVE DIRECTIVE DIRECTIVE
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EPA530-R-92-001
OSWER DIRECTIVE NQ;,9541. 00-14
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
WASHINGTON, D.C. 20460
JAN 8 |992
OFFICE OF
SOLID WASTE AND EMERGENCY RESPONSE
MEMORANDUM
SUBJECTS State Programs Adviso
FROM: Sylvia K. Lowr;
Office of Solid
TO: Regional Waste Management Division Directors
Regions I - X
The State and Regional Programs Branch (SRPB) periodically
issues State Programs Advisories (SPAs) as new RCRA program
policies, regulations, and self- implementing statutory provisions
come into effect. These SPAs update the State Authorization Manual
(SAM) , which replaced the State Consolidated Authorization Manual
(SCRAM) .
The attached SPA 9 covers RCRA program changes for the period
January 1 through June 30, 1990. Included in this SPA are nine new
revision checklists and ten revised existing checklists. A
Consolidated Land Disposal Eestrictions Checklist is also in SPA 9,
which consolidates all of the Land Disposal Restrictions from the
first rule (solvents and dioxins) to the Third Thirds Rule. A
revised Model Attorney General's Statement and other revised SAM
materials are also included.
Each Region is asked to distribute the SPA to their States,
Besides the attached hard copy, this SPA is available on diskette,
and is also on the SRPB Bulletin Board Service which is available
to Regions and States at no charge by calling 1-800-243-2792. If
you have guestions about these materials, please contact Richard
LaShier, Chief of the Regional Coordination and Implementation
Section, at ITS 260-2210.
Attachments
cc: RCRA Branch Chiefs, Regions I - X
State Program Section Chiefs, Regions I - X
ASTSWMO
State Programs Liaisons
v§} Prinled on Recycled Paper
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DIR. No. 9541.00-14
SPA 9
Summary for State Program Advisory Nine
The following points briefly highlight the content of SPA 9. These points are organized by
topic.
Checklists
a. New
b. Existing
This SPA provides nine new revision checklists (Numbers 71 through 79) and
one amended checklist (Number 24), covering RCRA regulatory changes for
the period January 1, 1990 through June 30, 1990. Revision Checklists 71,
72, 73, 76 and 78 were added to non-HSWA Cluster VI. Revision Checklists
74, 75, 77, 78 and 79 were added to HSWA Cluster II. Revision Checklist
78 is in both clusters because it contains both HSWA and non-HSWA
provisions.
SPA 9 includes a Consolidated Land Disposal Restrictions Checklist which
consolidates all of the land disposal restrictions from the first rule - solvents
and dioxins (Revision Checklist 34) through the Third Thirds Rule (Revision
Checklist 78). This checklist was developed to allow States to apply for
these restrictions at one time rather than in seven separate checklists (i.e.,
Revision Checklists 34, 39, 50, 62, 63, 66 and 78), since the LDRs have
changed so dramatically with every subsequent revision checklist. States
should bear in mind that the deadline for the provisions addressed by
Revision Checklist 34 was July 1, 1988 (July 1, 1989 if a statutory change
was necessary). The deadline for the remainder of the restrictions is July 1,
1991 or July 1, 1992 if a statutory change is necessary.
This SPA provides revised Consolidated Checklists C1-C9 including changes
to the RCRA regulations through June 30, 1990. These consolidated
checklists were developed to help States meet the requirements of RCRA
§3006(b) and 40 CFR 271.3(f) that require a State, applying for authorization,
to include in its program all Federal self-implementing provisions and ail
regulations in 40 CFR Parts 124, 260-266, 268, and 270 that were in effect
twelve months prior to the State's submission of its official application.
Revision Checklist 17 H was revised to include a note at the beginning of
this checklist explaining its relationship to Revision Checklist 77.
Revision Checklist 19 was revised so that the November 19, 1986 Federal
Register article (51 FR 41900) was removed from the title. This article did
not affect any code, but instead addressed issues surrounding the potential
listing of used oil as hazardous. This change was made to make the format
of this checklist consistent with that of the other checklists.
DSUM9 - 12/13/91
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OSWER DIR. No. 9541.00-14
SPA 9
STATE PROGRAM ADVISORY #9
A. STATE PROGRAM CHANGES FOR JANUARY 1, 1990 - JUNE 30, 1990
1. Mining Waste ..Exclusion l|
Date: January 23, 1990 Reference: 55 FR 2322-2354
Effective: July 23, 1990
Summary: This rule removes five of twenty conditionally retained mineral processing
wastes from the exemption from hazardous waste regulations under the Bevill exclusion
(RCRA 3001 (b)(3)(A)(ll)). These five wastes are subject to hazardous waste regulations if
they are found to exhibit a hazardous characteristic or are otherwise identified or listed as
hazardous. The Bevill exclusion is retained for fifteen other conditionally retained wastes
and five previously retained wastes. The rule also makes technical corrections to the
definition of "beneflciation" promulgated on September 1, 1989 (54 FR 36592), and amends
the definition of "designated facility" under Subtitle C of RCRA.
This rule also waives the RCRA §3010 notification deadline for mineral processing plants
that are located in authorized States and that generate wastes removed from exclusion in
the September 1, 1989 final rule. This rule extends the deadline for such plants in
unauthorized States, with notification required by April 23, 1990.
Note that the checklist addressed by this rule is entitled "Mining Waste Exclusion II". to
indicate that this is the second of two amendments to the mining waste exclusion. The
first occurred at 54 FR 36592 {September 1, 1989) and is addressed by Revision Checklist
65.
State Authorization: This is a non-HSWA rule and will be included in non-HSWA Cluster
VI. The State modification deadline is July 1, 1991. Only final authorization is available.
The State revision application must include a revised program description, an AG
Statement addendum, an addendum to the MOA (if appropriate), Revision Checklist 71,
and associated State regulations.
SAM Update: Updates to Tables G-1 and G-2 of Appendix G, the Model Revision Attorney
General's Statement of Appendix E and the Checklist Linkage Tabte of Appendix H are
necessary to reflect the addition of this checklist. These revisions are addressed in
Section B of this SPA. A copy of Revision Checklist 71 and its associated FR notice may
be found in Attachment A.
DTEXT9.9 - 12/9/91
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SPA 9
Summary for State Program Advisory Nine (cont'd)
The land disposal restriction checklists (34, 39, 50, 62, 63 and 66) were
revised to make the optional designations consistent among these checklists
and to make formatting changes which provide better guidance in handling
the nondelegable portions of the land disposal restrictions.
Revision Checklist 53 was revised, reflecting the recent judicial remanding of
five (K064, K065, K066, K090 and K091) of the "Bevill" listings addressed by
this checklist.
Revision Checklist 54 was revised 1) to indicate the removal from the code
of subparagraphs 270.41 (a) (3) (!)-(»() and 2) to correct the Federal RCRA
Citation column so that it reads 270.42(i)-{o) instead of 270.42(i)-{p).
Cluster Information
SAM
SPA 9 delineates timeframes by which States must obtain authorization for
non-HSWA Cluster VI and HSWA Cluster II. Revision Checklists 71, 72, 73,
76, and 78 close non-HSWA Cluster VI and Revision Checklists 74, 75, 77,
78, and 79 close HSWA Cluster II. The due date for both clusters is July 1,
1991 (July 1, 1992 if a statutory change is necessary). For further
information on the cluster rule, see September 26, 1986 (51 FR 33712).
This SPA provides updated Tables G-1 and Q-2, a Model Revision Attorney
General's Statement, a Model Consolidated Attorney General's Statement,
and a Checklist Linkage Table to insert into the SAM.
The instructions to SAM Appendix G were revised to reflect several
formatting changes made to Table G-1.
5' 2 - DSUM9- 12/13/91
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STATE PROGRAM ADVISORY #9 (corrt'd) SPA 9
2. Modification of F019 Listing
Date: February 14, 1990 Reference: 55 FR 5340-5342
Effective: February 14, 1990
Summary: This rule amends the Hst of hazardous wastes from non-specific sources under
40 CFR 261.31 by modifying the scope of EPA Hazardous Waste No. F019--wastewater
treatment sludges from the chemical conversion coating of aluminum. This rule excludes
wastewater treatment sludges from the zirconium phosphating step, when such phosphating
is an exclusive conversion coating process in the aluminum can washing process. The
EPA believes that these sludges do not pose a substantial hazard to human health or the
environment.
State Authorization: This is a non-HSWA rule and will be included In non-HSWA Cluster
VI. The standards promulgated in this rule are less stringent than or reduce the scope of
existing Federal requirements. Therefore, States are not required to modify their program
to adopt these provisions. The modification deadline for those States wishing to adopt
these provisions is July 1, 1991. Only final authorization is available. The State revision
application must include a revised program description, an AG Statement addendum, an
addendum to the MOA (if appropriate), Revision Checklist 72, and associated State
regulations.
SAM Update: Updates to Tables G-1 and G-2 of Appendix G, the Model Revision Attorney
General's Statement of Appendix E and the Checklist Linkage Table of Appendix H are
necessary to reflect the addition of this checklist. These revisions are addressed in
Section B of this SPA. A copy of Revision Checklist 72 and its associated FR notice may
be found In Attachment A.
3. Testing and Monitoring Activities; Technical Corrections
Date: March 9, 1990 Reference: 55 FR 8948-8950
Effective: March 9, 1990
Summary: This rule provides technical corrections to the flnal rule Issued for testing and
monitoring activities on September 29, 1989 (54 FR 40260, Revision Checklist 67). The
corrections add a list of the 47 analytical testing methods to the section of the regulations
that incorporates these methods by reference (40 CFR 260.11 (a)). The rule also corrects
Tables 2 and 3 of Appendix ill to 40 CFR Part 261.
State Authorization: This is a non-HSWA rule and will be included In non-HSWA Cluster
VI. The State modification deadline is July 1, 1991. Only flnal authorization is available.
The State revision application must include a revised program description, an AG
Statement addendum, an addendum to the MOA (if appropriate), Revision Checklist 73,
and associated State regulations.
SAM Update: Updates to Tables G-1 and G-2 of Appendix G, the Model Revision Attorney
General's Statement of Appendix E and the Checklist Linkage Table of Appendix H are
2 ' DTEXT9.9 - 12W91
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OSWER DIR. No. 9541.00-14
STATE PROGRAM ADVISORY #9 (confd) SPA 9
necessary to reflect the addition of this checklist. These revisions are addressed in
Section B of this SPA, A copy of Revision Checklist 73 and its associated FR notice may
be found in Attachment A.
4. Toxicity Characteristic Revisions
Date: March 29, 1990 Reference: 55 FR 11798-11877
June 29, 1990 55 FR 26986-26998
Effective; September 25, 1990
September 25, 1990
Summary: This rule revises the existing toxicity characteristics used to Identify those
wastes that are defined as hazardous and that are subject to regulation under Subtitle C of
the Resource Conservation and Recovery Act (RCRA) due to their potential to leach
significant concentrations of specific toxic constituents. In this rule, the Extraction
Procedure (EP) leach test is replaced by the Toxicity Characteristic Leaching Procedure
(TCLP), 25 organic chemicals are added to the list of toxic constituents of concern, and
regulatory levels are established for these organic chemicals based on health-based
concentration thresholds and a dilution/attenuation factor that was developed using a
subsurface fate and transport model. The overall effect of this rule is to subject additional
wastes to control under Subtitle C of RCRA.
The June 29, 1990 (55 FR 26986) notice makes corrections to the March 29, 1990 (55 FR
11798) final rule in order to ensure consistency of the TCLP (Method 1311) with other
methods contained in Test Methods for Evaluating Solid Waste (Physical/Chemical
Methods) SW-846 and to clarify the section on quality assurance. The notice also corrects
several errors in the March 29, 1990, notice.
An August 2, 1990 (55 FR 31387) notice corrected the preamble to the March 29, 1990,
notice. The correction was made to an implementation timetable which contained a
typographical error that has created confusion among small quantity generators regarding
their notification responsibilities for TC wastes. The August 2, 1990, ruie also extends the
time period within which affected small quantity generators must comply with the new
modification requirements necessitated by the March 29, 1990, Toxicity Characteristics
Rule. An August 10, 1990 (55 FR 32733) notice corrected the August 2, 1990 notice.
This rule did not affect the Federal code.
On September 27, 1990 (55 FR 39409) a clarification to the March 29, 1990 ruie was
published regarding the following four implementation issues: 1) the regulatory status of
surface impoundments managing newly regulated TC wastes, 2) ground-water monitoring
requirements for newly regulated land disposal facilities, 3) Section 3010 notification
requirements, and 4) permit modification requirements. This final rule did not affect the
Federal code; instead, it provides clarification of issues addressed in the preamble to the
final rule.
An October 5, 1990 (55 FR 40834) interim final ruie extended, for 120 days, the
compliance date of the Toxicity Characteristics Rule for petroleum refining facilities,
marketing terminals and buik plants engaged in hydrocarbon recovery and remediation
3 OTEXT9.9 - 12/W91
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DO NOT PHOTOGRAPH THIS PAGE
ATTENTION: REPRODUCTION
THIS DOCUMENT IS MICROFICHED AS ONE REPORT
IT IS PRINTED IN <* PARTS DIVIDED AT THIS PAGE
ATTENTION: SPECIAL REPRODUCTION UNIT
THE PARTS INDICATED ABOVE SHOULD BE PRINTED
AS FOLLOWS:
PART 1: PAGE THROUGH PAGE
disk: Pam25 - Form/extra large rpts - 9/18/90
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j 1. NOc
PA8E i
PB92-.-U9285
'i. Title and Subtitle
STATE PR06MHS ADVISORY MUNBER NINE
5= Report Date
JANUARY 1992
8, Performing Organization Rept, No
OFFICE OF SOLID NftSTE
U,S, EPfi
Offits of Solid
401 M, Street SW
Washington, DC 20460
Sponsoring Or^snization Name and Address
] 13, Type of Report I: Period Covered
SPA 19 - JftNUARY 1992
15, Suppleaentary Notes
State Prograiiss Advisory No, 9 updates the State Authorization ilanual (PB 9540=00-09fi)s which rsplaced the state
Consolidated Authorization MenusL This SPn 19 covers RCRft Program changes -for the period January i through June 30,
1990, Included are nine new revision checklists, and ten revised existing checklists, ft consolidated land disposal
restrictions checklist is also included*
REPRODUCED BY
U.S. DEPARTMENT OF COMMERCE
NATIONAL TECHNICAL
INFORMATION SERVICE
SPRINGFIELD, VA 22161
19, Security Class (This Report)) 21. No, of Pages
j 20, Security Class (This Page)
f UNCLASSIFIED
(See ftNSI-Z39»18)
OPTIONAL FORM 272 14-77
(Foriiieriy NTIS-35!
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NOTICE
THIS DOCUMENT HAS BEEN REPRODUCED FROM THE. BEST COPY
FURMSHED US BY THE SPONSORING AGENCY. ALTHOUGH IT IS
RECOGNIZED THAT CERTAIN PORTIONS ARE ILLEGIBLE, IT IS BEING
RELEASED IN THE INTEREST OF MAKING AVAILABLE AS MUCH
INFORMATION AS POSSIBLE.
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EPA
United States
Environmental Protection
Agency
Office of
Solid Waste and
Emergency Response
EPA530-R-92-001
PB92-149285
DIRECTIVE NUMBER: 9541.00-14
TITLE: State Programs .Advisory Number Nine
APPROVAL DATE:
EFFECTIVE DATE:
January 8, 1992
Janua^ 8' 1992
Office of Solid Waste
ORIGINATING OFFICE: Permits and State Programs Division
State and Regional Programs Branch
Regional Coordination and Implementa
tion Section
X
FINAL
DRAFT
STATUS:
D A - Pending OMB Approval
D B • Pending AA-OSWER Approval
REFERENCE (Other Documents):
Updates State Authorization Manual 9540.00-09A
OSWEh OSWE* OSWER OSWEFl
DIRECTIVE DIRECTIVE DIRECTIVE
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EPA530-R-92-001
untieo oiaies cnvirDnrnenTai rroieciion Agency
Washington, DC 20460
OSWER Directive initiation Request
1, Directive Number
9541.00-14
2. Originator Information
vlarae of Contact Person
zena Aiariage
Mail Code
OS-342
Office
PSPD/SPB/RCIS
Telephone Code
260-9656
3. Title
State Programs Advisory Number Nine
4. Summary of Directive (include brief statement of purpose)
Updates State Authorization Manual, which replaced the State Consolidated
Authorization Manual. This SPA #9 covers RCRA program changes for the period
January 1 through June 30, 1990. Included are nine new revision checklists and
ten revised existing checklists. A consolidated land disposal restrictions
checklist is also included.
5, Keywords
State Programs/Advisory
6a. Does This Directive Supersede Previous Direetive(s)?
b, Does It Supplement Previous Direetive(s)?
No
No
Yes What directive (number, title)
Yes What directive (number, title)
State Authorization Manual
7. Draft Level
A - Signed by AA/DAA
B - Signed by Office Director
C - For Review & Comment
D - In Development
8. Document to be distributed to States by Headquarters?
x
Yes
No
This Request Meets OSWER Directives System Format Standards.
9, Signature of Lead Office Directives CoordimrtSN
^ThnutJ ^). &sf~**^D~
1tM9Sme(ipAd Title of Approving Official
Sylvia K. Lowrance, Director, Office of Solid Waste
Date
1/22/92
Date
1/8/92
EPA Form 1315-17 (Rev. 5-87) Previous editions are obsolete.
OSWER OSWER OSWER O
VE DIRECTIVE DIRECTIVE DIRECTIVE
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EP&53Q-R-92-Q01
OSWER DIRECTIVE NOi9541.00-14
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
WASHINGTON, D.C. 20460
JAN 8 1992
OFFICE OF
SOLID WASTE AND EMERGENCY RESPONSE
MEMORANDUM
SUBJECT! State Programs Advisory Hunger Nine
FROM! Sylvia K. Lowr
office of Solid
TO; Regional Waste Management Division Directors
Regions I - X
The State and Regional Programs Branch (SRPB) periodically
issues State Programs Advisories (SPAs) as new RCRA program
policies, regulations, and self-implementing statutory provisions
come into effect. These SPAs update the State Authorization Manual
(SAM), which replaced the State Consolidated Authorization Manual
(SCRAM).
The attached SPA 9 covers RCRA program changes for the period
January 1 through June 30, 1990. Included in this SPA are nine new
revision checklists and ten revised existing checklists. A
Consolidated Land Disposal Restrictions Checklist is also in SPA 9,
which consolidates all of the Land Disposal Restrictions from the
first rule (solvents and dioxins) to the Third Thirds Rule. A
revised Model Attorney General's Statement and other revised SAM
materials are also included.
Each Region is asked to distribute the SPA to their States.
Besides the attached hard copy, this SPA is available on diskette,
and is also on the SRPB Bulletin Board Service which is available
to Regions and States at no charge by calling 1-800-243-2792. If
you have questions about these materials, please contact Richard
LaShier, Chief of the Regional Coordination and Implementation
Section, at FTS 260-2210.
Attachments
cc: RCRA Branch Chiefs, Regions I - X
state Program section Chiefs, Regions I - X
ASTSWMO
State Programs Liaisons
V® Printed on Recycled Paper
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OSWER DIR. No. 9541.00-14
SPA 9
Summary for State Program Advisory Nine
The following points briefly highlight the content of SPA 9. These points are organized by
topic.
Checklists
a. New
b. Existing
This SPA provides nine new revision checklists (Numbers 71 through 79) and
one amended checklist (Number 24), covering RCRA regulatory changes for
the period January 1, 1990 through June 30, 1990. Revision Checklists 71,
72, 73, 76 and 78 were added to non-HSWA Cluster VI. Revision Checklists
74, 75, 77, 78 and 79 were added to HSWA Cluster II. Revision Checklist
78 is in both clusters because it contains both HSWA and non-HSWA
provisions.
SPA 9 includes a Consolidated Land Disposal Restrictions Checklist which
consolidates all of the land disposal restrictions from the first rule -- solvents
and dioxins (Revision Checklist 34) through the Third Thirds Rule (Revision
Checklist 78). This checklist was developed to allow States to apply for
these restrictions at one time rather than in seven separate checklists (i.e.,
Revision Checklists 34, 39, 50, 62, 63, 66 and 78), since the LDRs have
changed so dramatically with every subsequent revision checklist. States
should bear in mind that the deadline for the provisions addressed by
Revision Checklist 34 was July 1, 1988 (July 1, 1989 if a statutory change
was necessary). The deadline for the remainder of the restrictions is July 1,
1991 or July 1, 1992 if a statutory change is necessary.
This SPA provides revised Consolidated Checklists C1-C9 including changes
to the RCRA regulations through June 30, 1990. These consolidated
checklists were developed to help States meet the requirements of RCRA
§3006(b) and 40 CFR 271.3(f) that require a State, applying for authorization,
to include in its program all Federal self-implementing provisions and all
regulations in 40 CFR Parts 124, 260-266, 268, and 270 that were in effect
twelve months prior to the State's submission of its official application.
Revision Checklist 17 H was revised to include a note at the beginning of
this checklist explaining its relationship to Revision Checklist 77.
Revision Checklist 19 was revised so that the November 19, 1986 Federal
Register article (51 FR 41900) was removed from the title. This article did
not affect any code, but instead addressed issues surrounding the potential
listing of used oil as hazardous. This change was made to make the format
of this checklist consistent with that of the other checklists.
DSUM9 - 12/13/91
-------
SPA 9
Summary for State Program Advisory Nine (cont'd)
The land disposal restriction checklists (34, 39, 50, 62, 63 and 66) were
revised to make the optional designations consistent among these checklists
and to make formatting changes which provide better guidance in handling
the nondelegable portions of the land disposal restrictions.
Revision Checklist 53 was revised, reflecting the recent judicial remanding of
five (K064, K065, K066, K090 and K091) of the "Bevill" listings addressed by
this checklist.
Revision Checklist 54 was revised 1) to indicate the removal from the code
of subparagraphs 270.41 (a)(3)(i)-(iii) and 2) to correct the Federal RCRA
Citation column so that it reads 270.42(i)-(o) instead of 270.42(i)-(p).
Cluster Information
SAM
SPA 9 delineates timeframes by which States must obtain authorization for
non-HSWA Cluster VI and HSWA Cluster II. Revision Checklists 71, 72, 73,
76, and 78 close non-HSWA Cluster VI and Revision Checklists 74, 75, 77,
78, and 79 close HSWA Cluster II. The due date for both clusters is July 1,
1991 (July 1, 1992 if a statutory change is necessary). For further
information on the cluster rule, see September 26, 1986 (51 PR 33712).
This SPA provides updated Tables G-1 and G-2, a Model Revision Attorney
General's Statement, a Model Consolidated Attorney General's Statement,
and a Checklist Linkage Table to insert into the SAM.
The instructions to SAM Appendix G were revised to reflect several
formatting changes made to Table G-1.
- 2 - DSUM9 - 12/13/91
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OSWER DIR. No. 9541.00-14
SPA 9
STATE PROGRAM ADVISORY #9
A. STATE PROGRAM CHANGES FOR JANUARY 1, 1990 - JUNE 30, 1990
1. Mining Waste Exclusion II
Date: January 23, 1990 Reference: 55 FR 2322-2354
Effective: July 23, 1990
Summary: This rule removes five of twenty conditionally retained mineral processing
wastes from the exemption from hazardous waste regulations under the Bevill exclusion
(RCRA 3001(b)(3)(A)(ii)). These five wastes are subject to hazardous waste regulations if
they are found to exhibit a hazardous characteristic or are otherwise identified or listed as
hazardous. The Bevill exclusion is retained for fifteen other conditionally retained wastes
and five previously retained wastes. The rule also makes technical corrections to the
definition of "beneficiation" promulgated on September 1, 1989 (54 FR 36592), and amends
the definition of "designated facility" under Subtitle C of RCRA.
This rule also waives the RCRA §3010 notification deadline for mineral processing plants
that are located in authorized States and that generate wastes removed from exclusion in
the September 1, 1989 final rule. This rule extends the deadline for such plants in
unauthorized States, with notification required by April 23, 1990.
Note that the checklist addressed by this rule is entitled "Mining Waste Exclusion II" to
indicate that this is the second of two amendments to the mining waste exclusion. The
first occurred at 54 FR 36592 (September 1, 1989) and is addressed by Revision Checklist
65.
State Authorization: This is a non-HSWA rule and will be included in non-HSWA Cluster
VI. The State modification deadline is July 1, 1991. Only final authorization is available.
The State revision application must include a revised program description, an AG
Statement addendum, an addendum to the MOA (if appropriate), Revision Checklist 71,
and associated State regulations.
SAM Update: Updates to Tables G-1 and G-2 of Appendix G, the Model Revision Attorney
General's Statement of Appendix E and the Checklist Linkage Table of Appendix H are
necessary to reflect the addition of this checklist. These revisions are addressed in
Section B of this SPA. A copy of Revision Checklist 71 and its associated FR notice may
be found in Attachment A.
DTEXT9.9 - 12/9/91
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STATE PROGRAM ADVISORY #9 (cont'd) SPA 9
2. Modification of F019 Listing
Date: February 14, 1990 Reference: 55 FR 5340-5342
Effective: February 14, 1990
Summary: This rule amends the list of hazardous wastes from non-specific sources under
40 CFR 261.31 by modifying the scope of EPA Hazardous Waste No. F019--wastewater
treatment sludges from the chemical conversion coating of aluminum. This rule excludes
wastewater treatment sludges from the zirconium phosphating step, when such phosphating
is an exclusive conversion coating process in the aluminum can washing process. The
EPA believes that these sludges do not pose a substantial hazard to human health or the
environment.
State Authorization: This is a non-HSWA rule and will be included in non-HSWA Cluster
VI. The standards promulgated In this rule are less stringent than or reduce the scope of
existing Federal requirements. Therefore, States are not required to modify their program
to adopt these provisions. The modification deadline for those States wishing to adopt
these provisions is July 1, 1991. Only final authorization is available. The State revision
application must include a revised program description, an AG Statement addendum, an
addendum to the MOA (if appropriate), Revision Checklist 72, and associated State
regulations.
SAM Update: Updates to Tables G-1 and G-2 of Appendix G, the Model Revision Attorney
General's Statement of Appendix E and the Checklist Linkage Table of Appendix H are
necessary to reflect the addition of this checklist. These revisions are addressed in
Section B of this SPA. A copy of Revision Checklist 72 and Its associated FR notice may
be found in Attachment A.
3. Testing and Monitoring Activities: Technical Corrections
Date: March 9, 1990 Reference: 55 FR 8948-8950
Effective: March 9, 1990
Summary: This rule provides technical corrections to the final rule issued for testing and
monitoring activities on September 29, 1989 (54 FR 40260, Revision Checklist 67). The
corrections add a list of the 47 analytical testing methods to the section of the regulations
that incorporates these methods by reference (40 C.FR 260.11 (a)). The rute also corrects
Tables 2 and 3 of Appendix III to 40 CFR Part 261.
State Authorization: This is a non-HSWA rule and will be included In non-HSWA Cluster
VI. The State modification deadline Is July 1, 1991. Only final authorization is available.
The State revision application must include a revised program description, an AG
Statement addendum, an addendum to the MOA (if appropriate), Revision Checklist 73,
and associated State regulations.
SAM Update: Updates to Tables G-1 and G-2 of Appendix G, the Model Revision Attorney
General's Statement of Appendix E and the Checklist Linkage Table of Appendix H are
2 DTEXT9.9 - 12/0/91
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OSWER DIR. NO. 9541.00-14
STATE PROGRAM ADVISORY #9 (oont'd) SPA 9
necessary to reflect the addition of this checklist. These revisions are addressed in
Section B of this SPA. A copy of Revision Checklist 73 and its associated FR notice may
be found in Attachment A.
4. Toxicity Characteristic Revisions
Date: March 29, 1990 Reference: 55 FR 11798-11877
June 29, 1990 55 FR 26986-26998
Effective: September 25, 1990
September 25, 1990
Summary: This rule revises the existing toxicity characteristics used to identify those
wastes that are defined as hazardous and that are subject to regulation under Subtitle C of
the Resource Conservation and Recovery Act (RCRA) due to their potential to leach
significant concentrations of specific toxic constituents. In this rule, the Extraction
Procedure (EP) leach test is replaced by the Toxicity Characteristic Leaching Procedure
(TCLP), 25 organic chemicals are added to the list of toxic constituents of concern, and
regulatory levels are established for these organic chemicals based on hearth-based
concentration thresholds and a dilution/attenuation factor that was developed using a
subsurface fate and transport model. The overall effect of this rule is to subject additional
wastes to control under Subtitle C of RCRA.
The June 29, 1990 (55 FR 26986) notice makes corrections to the March 29, 1990 (55 FR
11798) final rule in order to ensure consistency of the TCLP (Method 1311) with other
methods contained in Test Methods for Evaluating Solid Waste (Physical/Chemical
Methods) SW-846 and to clarify the section on quality assurance. The notice also corrects
several errors in the March 29, 1990, notice.
An August 2, 1990 (55 FR 31387) notice corrected the preamble to the March 29, 1990,
notice. The correction was made to an implementation timetable which contained a
typographical error that has created confusion among small quantity generators regarding
their notification responsibilities for TC wastes. The August 2, 1990, rule also extends the
time period within which affected smail quantity generators must comply with the new
modification requirements necessitated by the March 29, 1990, Toxicity Characteristics
Rule. An August 10, 1990 (55 FR 32733) notice corrected the August 2, 1990 notice.
This rule did not affect the Federal code.
On September 27, 1990 (55 FR 39409) a clarification to the March 29, 1990 rule was
published regarding the following four implementation issues: 1) the regulatory status of
surface impoundments managing newly regulated TC wastes, 2) ground-water monitoring
requirements for newly regulated land disposal facilities, 3) Section 3010 notification
requirements, and 4) permit modification requirements. This final rule did not affect the
Federal code; instead, it provides clarification of issues addressed in the preamble to the
final rule.
An October 5, 1990 (55 FR 40834) interim final rule extended, for 120 days, the
compliance date of the Toxicity Characteristics Rule for petroleum refining facilities,
marketing terminals and bulk plants engaged in hydrocarbon recovery and remediation
3 DTEXT9.9 - 12/9/91
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STATE PROGRAM ADVISORY #9 (cont'd) SPA 9
activities. This interim final rule is addressed by Revision Checklist 80 which will be part of
SPA 10. A Consolidated Toxicity Characteristics Checklist will also be available for States
wishing to adopt the TC rule and all of its corrections at one time.
State Authorization: These are HSWA rules and wiii be included In HSWA Cluster II. Both
interim and final authorization are available; interim authorization expires January 1, 1993.
The State modification deadline is July 1, 1991 (or July 1, 1992, if a State statutory change
is needed). The State revision application must include a revised program description, an
AG Statement addendum, an addendum to the MOA (if appropriate), Revision Checklist 74,
and associated State regulations.
SAM Update: Updates to Tables G-1 and G-2 of Appendix G, the Model Revision Attorney
General's Statement of Appendix E and the Checklist Linkage Table of Appendix H are
necessary to reflect the addition of this checklist. These revisions are addressed in
Section B of this SPA. A copy of Revision Checklist 74 and its associated FR notice may
be found in Attachment A.
5. Listing of 1.1-Dlmethvihvdrazine Production Wastes
Date: May 2, 1990 Reference: 55 FR 18496-18506
Effective: November 2, 1990
Summary: This rule lists as hazardous four wastes (K107-K110) generated during the
production of 1,1-dimethylhydrazine (UDMH) from carboxyllc acid hydrazides.
State Authorization: This is a HSWA rule and will be included in HSWA Cluster II. The
State modification deadline is July 1, 1991. Both interim and final authorization are
available. The State revision application must include a revised program description, an
AG Statement addendum, an addendum to the MOA (if appropriate), Revision Checklist 75,
and associated State regulations.
SAM Update: Updates to Tables G-1 and G-2 of Appendix G, the Model Revision Attorney
General's Statement of Appendix E and the Checklist Linkage Table of Appendix H are
necessary to reflect the addition of this checklist. These revisions are addressed in
Section B of this SPA. A copy of Revision Checklist 75 and its associated FR notice may
be found in Attachment A.
6. Criteria for Listing Toxic Wastes; Technical Amendment
Date: May 4, 1990 Reference: 55 FR 18726
Effective: May 4, 1990
Summary: This rule is a technical amendment to the final and interim final regulations
implementing RCRA, promulgated May 19, 1980. The rule amends the language of the
regulation to reflect EPA's intent and consistent interpretation of the criteria for listing
4 DTEXT9.9 - 12/»91
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OSWER DIR. No. 9541.00-14
STATE PROGRAM ADVISORY #9 (cont'd) SPA 9
wastes as hazardous under RCRA. Specifically affected are the criteria for listing toxic
wastes at 261.11(a)(3).
State Authorization: This is a non-HSWA rule and will be included in non-HSWA Cluster
VI. The State modification deadline is July 1, 1991. Only final authorization is available.
The State revision application must include a revised program description if appropriate, an
AG Statement addendum, an addendum to the MOA (if appropriate), Revision Checklist 76,
and associated State regulations.
SAM Update: Updates to Tables G-1 and G-2 of Appendix G, the Model Revision Attorney
General's Statement of Appendix E and the Checklist Linkage Table of Appendix H are
necessary to reflect the addition of this checklist. These revisions are addressed in
Section B of this SPA. A copy of Revision Checklist 76 and its associated FR notice may
be found in Attachment A.
7. HSWA Codification Rule, Double Liners; Correction
Date: May 9, 1990 Reference: 55 FR 19262-19264
Effective: May 9, 1990
Summary: This rule is a correction notice to 50 FR 28702, July 17, 1985 (Revision
Checklist 17 H) pertaining to certain landfill and surface impoundment units for which the
Part B permit application was received by November 8, 1984. Permits issued for units in
this category are not required to include conditions imposing double liner and leachate
collection system requirements as a matter of statute (RCRA §3004(o)), except as deemed
necessary on a case-by-case basis to protect human health and the environment (RCRA
§3005(c)). This rule was necessitated by a Court of Appeals decision which found the
requirements at 40 CFR 265.221 and 264.301 invalid to the extent that they impose RCRA
§3004(o) technological requirements on owners and operators whose applications for a final
determination on their RCRA §3005 permits were received before November 8, 1984.
State Authorization: This is a HSWA rule and will be included in HSWA Cluster II. The
State modification deadline is July 1, 1991. Both interim and final authorization are
available. The State revision application must include a revised program description, an
AG Statement addendum, an addendum to the MOA (if appropriate), Revision Checklist 77
and associated State regulations.
SAM Update: Updates to Tables G-1 and G-2 of Appendix G, the Model Revision Attorney
General's Statement of Appendix E and the Checklist Linkage Table of Appendix H are
necessary to reflect the addition of this checklist. These revisions are addressed in
Section B of this SPA. A copy of Revision Checklist 77 and its associated FR notice may
be found in Attachment A.
DTEXT9.9 - 12/9/91
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STATE PROGRAM ADVISORY #9 (oonfd) SPA 9
8. Land Disposal Restrictions tor Third Third Scheduled Wastes
Date: June 1, 1990 Reference: 55 FR 22520-22720
Effective: May 8, 1990
Summary: This rule promulgates regulations implementing the final of five Congressionally
mandated prohibitions on the land disposal of hazardous wastes, the third one-third
(referred to as the Third Third) of the schedule of restricted hazardous wastes. The notice
also promulgates specific treatment standards and effective dates for "soft hammer" Rrst
and Second Third wastes, five newly listed wastes, four wastes that fall Into the F002 and
F005 (spent solvent) waste codes, F025, multi-source leachate, certain mixed
radioactive/hazardous wastes, and characteristic wastes except TC wastes. Treatment
standards are revised for petroleum refining hazardous wastes (K048-K052). Alternate
treatment standards are promulgated for lab packs.
A three-month national capacity variance from the effective date Is granted for all Third
Third wastes unless a longer national capacity variance is specified. This variance was
granted due to the time required by the regulated community to make adjusttnents
necessary to comply with the new rule. Therefore, this rule's land disposal prohibitions will
be effective on August 8, 1990, rather than May 8, 1990. Between May 8, 1990 and
August 8, 1990 wastes not meeting the treatment standards must meet the 40 CFR
268.5(h}(2) minimum technology standards if disposed in landfills or surface impoundments.
The California list prohibitions must be complied with, where applicable. The 40 CFR
268.7(a)(3)&(b)(6) recordkeeping requirements apply to all Third Third wastes during the
three-month national capacity variance.
A six-month national capacity variance is granted for K048-K052 nonwastewaters from the
petroleum refining industry. Thus, the effective date for these wastes is November 8, 1990.
A two-year national capacity variance is granted for mixed radioactive/hazardous wastes,
naturally occurring radioactive materials that are mixed with RCRA hazardous wastes; soil
and debris contaminated with Third Third wastes for which the treatment standard is based
on incineration, mercury retorting, vitrification, or wet-air oxidation; and inorganic debris as
defined in §268.2(a)(7) (which also applies to chromium refractory bricks carrying the EPA
Hazardous Waste Nos. K048-K052). Tables 1 and 2 on p. 22533 of the Federal Register
for this rule provides a summary of two-year national capacity variances for surface-
disposed and deep well injected wastes.
For further guidance regarding this rule, see the Environmental Fact Sheet for the Third
Third Land Disposal Restrictions (EPA/53Q-SW-90-046) which is Included in this SPA with
the checklist developed for this rule.
State Authorization: This is a HSWA rule and will be included in HSWA Cluster II, except
for one clarifying amendment to 40 CFR 261.33(c), which is in non-HSWA Cluster VI. The
State modification deadline is July 1, 1991, for all provisions, both HSWA and non-HSWA.
Ail changes, except for the 261.33(c) amendment, go into effect immediately. The non-
HSWA change to 261.33(c) will not be effective in an authorized State until the State
revises its program. Interim authorization is available only for the HSWA provisions. The
State revision application must include a revised program description, an AQ Statement
DTEXT9.9 - 12/W91
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DIR. NO. 9541.00-14
STATE PROGRAM ADVISORY #9 (cont'd) SPA 9
addendum, an addendum to the MOA (if appropriate), Revision Checklist 78, and
associated State regulations.
SAM Update: Updates to Tables G-1 and G-2 of Appendix G, the Model Revision Attorney
General's Statement of Appendix E and the Checklist Linkage Table of Appendix H are
necessary to reflect the addition of this checklist. These revisions are addressed in
Section B of this SPA. A copy of Revision Checklist 78 and its associated FR notice may
be found in Attachment A.
9. Organic Air Emission Standards for Process Vents and Equipment Leaks
Date: June 21, 1990 Reference: 55 FR 25454-25519
Effective: December 21, 1990
Summary: This rule is the first part of a muRiphased regulatory effort to control air
emissions at new and existing hazardous waste treatment, storage or disposal facilities
{TSDFs). The rute establishes final standards limiting organic emissions from 1) process
vents associated with distillation, fractionation, thin-film evaporation, solvent extraction, and
air or steam stripping operations that manage hazardous wastes with 10 parts per million
by weight (ppmw) or greater total organics concentration, and 2) leaks from equipment that
contains or contacts hazardous waste streams with 10 percent by weight or greater total
organics. These standards were promulgated under RCRA §3004(n) which requires EPA to
promulgate standards for the monitoring and control of air emissions from hazardous waste
TSDFs as necessary to protect human health and the environment. EPA plans to
promulgate additional standards under §3004(n) in two phases.
State Authorization: This is a HSWA rule and will be included in HSWA Cluster II. The
State modification deadline is July 1, 1991. Both interim and final authorization are
available; interim authorization expires January 1, 1993. The State revision application
must include a revised program description, an AG Statement addendum, an addendum to
the MOA (if appropriate), Revision Checklist 79, and associated State regulations.
SAM Update: Updates to Tables G-1 and G-2 of Appendix G, the Model Revision Attorney
General's Statement of Appendix E and the Checklist Linkage Table of Appendix H are
necessary to reflect the addition of this checklist. These revisions are addressed in
Section B of this SPA. A copy of Revision Checklist 79 and its associated FR notice may
be found in Attachment A.
B. CONSOLIDATED LAND DISPOSAL RESTRICTIONS CHECKLIST
To aid States in adopting the Land Disposal Restrictions, a checklist was developed that
consolidates ail of the Land Disposal Restriction rules, and their corrections, through June
30, 1990 into one checklist. States can use this checklist to apply for ail of the Land
Disposal Restriction rules at the same time. Otherwise, seven separate checklists (34, 39,
50, 62, 63, 66 and 78) must be submitted to pick up all of these restrictions and each
successive checklist makes substantial changes to the other. States which have not yet
adopted any of the Land Disposal Restrictions should bear in mind that the restrictions on
7 OTEXT9.9
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STATE PROGRAM ADVISORY #9 (cont'd) SPA 9
solvents and dioxins (Revision Checklist 34) are in HSWA Cluster I and should have been
adopted by July 1, 1989 (July 1, 1990 if a statutory change is necessary). The remainder
of the Land Disposal Restrictions are In HSWA Cluster II and are due July 1, 1991 (July 1,
1992 if a statutory change is necessary). States that have already been authorized for
only the initial Land Disposal Restrictions (51 FR 40572; November 7, 1986; Revision
Checklist 34) may also want to utilize this consolidated checklist rather than use six
separate checklists to apply for the remaining requirements, all of which must be adopted
by July 1, 1991 (July 1, 1992 if a statutory change is required). This consolidated checklist
is included in Attachment B. An update to this checklist will be included in SPA 11.
C. REVISIONS TO SAM
The addition of nine new checklists necessitated revisions to Tables G-1 and G-2 of
Appendix G, to the Model Revision Attorney General's Statement in Appendix D, and to the
Checklist Linkage Table in Appendix H. These revised tables and model are included in
Attachment C and should replace these parts in the SAM Manual. Specific revisions are
detailed below.
• The revised Tables G-1 and G-2 (pp. 4-24) should replace pages 4 through 23
of SAM Appendix G. Table G-1 was revised by: 1) adding Revision Checklists
71, 72, 73, 76 and 78 (only the amendment to 261.33(c)) to non-HSWA Cluster
VI and 2) adding Checklists 74, 75, 77, 78, and 79 to HSWA Cluster II.
The Revised Attorney General's Statement (pp. 9-47) should replace pages 9
through 41 of SAM Appendix E. Section I K and XVII B(1) were revised and
the following sections were added: i A(14), I A(15), I A(16), I L, I M, I N, I O,
VII E, XV L, and XXI F.
The Revised Checklist Linkage Table should replace pages 3 through 6 of SAM
Appendix H.
Also, included in Attachment C are new Revision Checklists 17 H, 19, 53, and 54, and the
Land Disposal Restriction Checklists (34, 39, 50, 62, 63 and 66). The new Revision
Checklist 17 H differs from the previous Revision Checklist 17 H in that it includes a
beginning note indicating the relationship of this checklist to Revision Checklist 77. Also
several errors on page two of this checklist were corrected. The new Revision Checklist
19 differs from the previous Revision Checklist 19 in that the reference to the November
19, 1986 (51 FR 41900) Federal Register notice was removed from the title. This notice
did not affect the RCRA regulations; instead, it was a background notice addressing the
issues of listing used oil as hazardous. This was not necessary to list it on the title
although it is discussed in the note at the top of the checklist.
Revision Checklist 53 has been revised reflecting the recent Judicial remanding of five
(K064, K065, KQ66, K090, and K091) of the "Bevilf waste listings addressed by this
checklist. Specifically, the revisions to 261.4(b)(7) were added to the checklist and all
revisions regarding the listing of the five remanded wastes were removed from the
checklist. In addition, the Model Revision Attorney General's Statement included in this
SPA was revised. Specifically, the old entry for Revision Checklist 53 at H was moved to
8 DTEXT9.9 - 12/9/91
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OSWER DIR. No. 9541.00-14
STATE PROGRAM ADVISORY #9 (cont'd) SPA 9
I A(10) and an entry regarding the removal of the six Seville wastes from the mining
exclusion at 40 CFR 261.4(b)(7) was placed at I I.
Revision Checklist 54 has been revised to include the deletion from Federal code of
subparagraphs 270,41 (a)(3)(f)-(iii). The deletion of these subparagraphs isn't apparent in
the Federal Register addressed by Revision Checklist 54, but they have been removed and
the July 1, 1990 CFR correctly reflects their deletion. Several typographical errors were
also corrected.
The Land Disposal Restriction (LDR) Checklists (34, 39, 50, 62, 63, and 66) have been
revised for the following reasons:
to make the optional designations consistent among the seven (includes
Revision Checklist 78) LDR checklists;
to add the presently non-delegable portions (268.5, 268,6, 268.42(b) and
268.44) of Part 268 to the checklists in an effort to alleviate some of the
confusion these sections have caused States. Specific instructions regarding
placement of these sections within a State's code precede each of these
sections on the checklists; and
» to add information to the notes at the top of the checklists, tying each checklist
to the other LDR checklists.
Lastly, revised instructions for SAM Appendix G are also included in Attachment C. these
instructions were revised to reflect the following formatting changes to Table G-1:
• Parenthesized checklist numbers were added to entries which were
corrections/amendments to a major final rule and were included on the checklist
for that major final rule (e.g., the two technical corrections which are included
on Revision Checklist 13 developed for the January 1, 1985 final rule
addressing the definition of solid waste). Previously, these entries were
unnumbered and bracketed. This change was made to help alleviate some of
the confusion which has occurred over these entries since requests for StATS
data have been sent to the Regions.
Corrections/amendments which are part of the checklist for a major final rule
have been moved into the cluster of the checklist (i.e., final rule) on which they
were included. For example, Revision Checklist 26 was developed for the final
rule promulgated on May 28, 1986 (51 FR 19320). This checklist also includes
two subsequent technical corrections (51 FR 33612, September 22, 1986 and
52 FR 28697, August 3, 1987) to the initial final rule. The checklist itself is in
non-HSWA Cluster II while the two corrections which it also includes are in non-
HSWA Clusters III and IV, due to where the corrections fall chronologically.
Under the revised format, Revision Checklist 26 plus the two corrections
included in it, would all be placed in non-HSWA Cluster II. This change was
made because the due date for these corrections is the due date of the
checklist they are part of, rather than the due date of the cluster in which they
chronologically fall.
DTEXT9.9 - 12/9/91
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STATE PROGRAM ADVISORY #9 (cont'd) SPA 9
D. REVISED CONSOLIDATED CHECKLISTS AND MODEL CONSOLIDATED
ATTORNEY GENERAL'S STATEMENT
The consolidated checklists and corresponding Model Consolidated Attorney General's
Statement originally introduced in the State Authorization Manual have been updated
through June 30, 1990, These updated materials may be found in Attachment D, These
consolidated checklists should be used by States that have not received authorization for a
hazardous waste program. For further guidance regarding these checklists, see Appendix
K of the SAM Manual, Guidance for using the Model Consolidated Attorney General's
Statement may be found in SAM Appendix D.
10 DT1XT9.9 -
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OSWER DIE. No. 9541.00-14
ATTACHMENT A
New Revision Checklists and
Corresponding Federal Register Articles
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OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 71
Mining Waste Exclusion II
55 FR 2322-2354
January 23, 1990
(Non-HSWA Cluster V!)
Note: This is the second revision to the mining waste exclusion. The first occurred at 54 FR
36592 (September 1, 1989) and is addressed by Revision Checklist 65.
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUW^
ALENT
MORE I BROADER
STRINGENT | IN SCOPE
PART 260 - HAZARDOUS WASTE MANAGEMENT SYSTEM: GENERAL
SUBPART B - DEFINITIONS
DEFINITIONS
1 revise "designated
facility"
260.10
PART 261 - IDENTIFICATION AND LISTING OF HAZARDOUS WASTE
SUBPART A - GENERAL
EXCLUSIONS
"§261.4(b)(7)" replaces
"this paragraph" twice;
"roasting, autoclaving,
and/or chlorinatton"
replaces "roasting";
insert "(and/or auto-
ciaving and/or chlori-
nation)" after
"roasting" within exis-
ting parenthetical
clause; semi-colons
replace a number of
commas; significant
revisions to last sen-
tence which intro-
duces list of wastes
261.4(b)(7)
January 23, 1990 - Page 1 of 3
DCL71.9 - 12/9/91
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RCRA REVISION CHECKLIST 71: Mining Waste Exclusion II (cont'd)
SPA 9
FEDERAL REQUIREMENT
revisions to list of
excluded wastes;
(1)(A)-{E) and
(ij){A)-{T) are replaced
by (i)-(xx), with
deletion of five
conditionally retained
wastes and some
revisions in wording
for retained wastes
FEDERAL RCRA CITATION
261.4(b)(7Mn
261.4(bM7Mii)
261.4(b)(7)(iii)
261.4(b)(7)(iv)
261.4(bM7Mv)
261.4(b)(7)(vi)
261.4(bH7Hvi!)
261 .4{b)(7){viii)
261.4(b)(7)(ix)
261.4(b)(7)(x)
261.4(b){7){xi)
261.4(b)(7)(xii)
261.4(b>(7)(xili)
261.4(b)(7)(xiv)
261.4(b)(7)(xv)
261.4(b)(7)(xvi)
261.4{bM7)(xvii)
261.4(b)(7){xviii)
261.4(b)(7)(xix)
261.4(W(7)(xx)
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINGENT
j
i
BROADER
IN SCOPE
January 23, 1990 - Page 2 of 3
DCL71.9 - 12/9/91
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OSWER DIR. No. 9541.00-14
RCRA REVISION CHECKLIST 71: Mining Waste Exclusion I! (cont'd)
SPA 9
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
£Q(jW-
ALENT
MORi
STRINGENT
BROADER
IN SCOPE
PART 262 - STANDARDS APPLICABLE TO GENERATORS OF HAZARDOUS WASTE
SUBPART B - THE MANIFEST
USE OF THE MANIFEST
add new paragraph
stating requirements
when shipping
hazardous waste to a
designated facility In
an authorized State
which has not yet
obtained authorization
to regulate that
particular waste as
hazardous
262.23(e)
Note that this definition in the Federal Register (55 FR 2353, January 23, 1990) and in the July
1. 1990 CFR contains a typographical error. The reference to 260.20 should be 262.20.
January 23, 1990 - Page 3 of 3
DCL71.9 - 12/9/91
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Tuesday
January 23, 1990
OSWER DIR. No. 9541.00-14
Part ill
Environmental
Protection Agency
40 CFR Parts 260, 261 and 262
Mining Waste Exclusion; Section 3010
Notlilcatiorr for Mineral Processing
Facilities; Designated Facility Definition;
Standards Applicable to Generators of
Hazardous Waste; Final Rule
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2322 Federal Register / Vol. 55, No. 15 / Tuesday, January 23, 1990 / Rules and Regulations
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Parts 200,201 and 262
[SWH-FRL-3S09-3;CPA/OSW-FH-90-013J
Mining Waste Exclusion; Section 3010
Notification for Mlnc-ral Processing
Facilities; Designated Facility
Definition; Standards Applicable to
Generators of Hazardous Waste
AGENCY: Environmental Protection
Agency.
ACTION: Final rule.
SUMMARY: Today's finnl rule removes
five of 20 conditionally retained mineral
processing wastes from the exemption
from hazardous waste regulations
provided by section 3001(h)(3)(A)(ii) of
the Resource Conservation and
Recovery Act (RCRA), often referred to
as the Bovill exclusion. The five wastes
removed from the Bevill exclusion by
today's final rule are: Furnace off-gas
solids from elemental phosphorus
production, process wastewater from
primary lead processing, air pollution
control dust/sludge from lightweight
aggregate production, sulfate process
waste acids from titanium dioxide
production, and sulfate process waste
solids from titanium dioxide production.
Wastes removed from the exclusion are
subjoct to hazardous wnste regulations
if they are found to exhibit a hazardous
characteristic or are otherwise identified
or listed as hazardous.
Three wastes previously proposed on
September 25,1909 (54 FR 39298). for
removal from the Bevill exclusion are
retained under the exclusion by this
final rule. Those three wastes are: (1)
Treated residue from roasting/leaching
of chrome ore: (2) process wastexvater
from coal gasification; and (3) process
wastewater from hydrolfluoric ncid
production. The Bevill exclusion also is
retained for 12 of the original 13 other
conditonally retained wastes, which will
be addressed, along with 5 other wastes
in a Report to Congress and subsequent
Regulatory Determination by January 31,
1991. -
Today's rule makes technical
corrections to the definition of
"bcneficiation" that was promulgated on
September 1,1989 (54 FR 30592) and also
waives the RCRA Section 3010
notification deadline for mineral
processing facilities that are located in
authorized states and that generate
wastes removed from the exclusion in
the September 1,1089 final rule. Because
of confusion expressed by the regulated
community in response to statements
made in the preamble of the September
1 rule, today's rule also extends the
RCRA Section 0010 notification deadline
for mineral processing facilities that are
located in unauthorized states and that
generate wastes removed from the
exclusion by the September 1,1909 final
rule. Notification will now be required in
unauthorized states by April 23,1990.
Today's final rule also amends the
RCRA Subtitle C definition of
"designated facility" and the standards
applicable to generators of hazardous
waste to clarify the requirements for
completing hazardous waste shipment
manifests for transporting wastes from
one state where they are regulated as
hazardous to another in which they are
not regulated as hnzardous.
DATES: Effective Date: July 23,1990. Not
later than April 23,1990, all persons in
unauthorized states who generate,
transport, treat, store, or dispose of
wastes removed from temporary
exclusion by this rule or the September
1,1989 final rule and which are
characteristically hazardous under 40
CFR part 261, subpart C, must notify
EPA of these activities pursuant to
section 3010 of RCRA.
See sections V and VI of the preamble
below for additional dates and details.
FOR FURTHER INFORMATION, CONTACT:
RCRA/Superfund Hotlne at (800) 424-
9310 or (202) 382-3000, or for technical
information contact Dan Derkics or Bob
Hall, U.S. Environmental Protection
Agency, 401 M Street, SW, Washington,
DC 20100, (202) 382-3008, or (202) 475-
8814, respectively.
SUPPLEMENTARY INFORMA1ION:
Table of Contents
I. Introduction
A. Context
B. Overview of Today's Rule
C. Future Activities
II. Analysis of and Response to Public
Comments on Beviil Status of 20 Mineral
• Processing Wastes Proposed on
September 25,1909
A. General Comments on EPA's
Application of the Finnl Dcvill Criteria
B. Comments on the 13 Waste Streams
Proposed for Retention
C. Comments on the Seven Wastes
Proposed for Removal
D. Relationship of the Proposed Rule to
Subtitle C of RCRA
E. Costs and Impacts of the Proposed Rule
F. Requests for Clarifications/Technical
Corrections on the September 1,1989,
Final Rule
C. Concerns with Administrative Procedure
III. Revised Application of the Final Criteria
for Defining Bevill Miners! Processing
Wastes
A. Clarification of Waste Stream
Definitions
D. Compliance with the High Volume
Criterion
C. Compliance with the Low Hazard
Criterion
D. Bevill Status of Conditionally Retained
Mineral Piocosting Wastes
IV. Analysis of and Response to Comments
on Clarification to the Definition of
"Designated Facility" and Modificiiiio.'i
of the Standards Applicable to
Generators of Hazardous Wuste
A. General Comments on the Proposed
Definition
B. Relationship Between Today's
Clarification and Non-RCRA State
Hazardous Wastes
C. Who Can Qualify as a designated
Facility?
D. Which Standards Apply to Interstate
Shipments
E. Other Comments
F. Manifesting Requirements
V. Regulatory Implementation and Effective
Dates of the Final Rule
A. Section 3010 Notification
B. Compliance Dutes for Today's Rule
VI. Effect on State Authorizations
VII. F.conomic Impact Screening Analysis
Pursuant to Executive Order 12291
A. Approach
B. Aggregate and Sector Compliance Costs
C. Economic Impacts
VIII. Regulatory Flexibility Analysis
IX. List of Subjects in 40 CFR 260, 261 and 202
I, Introduction
A. Context
Section 3001(b)(3)(A)(ii) of the
Resource Conservation and Recovery
Act (RCRA) temporarily excludes "solid
waste from the extraction, beneficiation,
and processing of ores and minerals"
from regulation as hazardous waste
under Subtitle C of RCRA, pending
completion of certain studies by EPA. In
1900, EPA temporarily interpreted this
exclusion, often referred to as the Bevill
exclusion, to encompass "solid waste
from the exploration, mining, milling,
smelting and refining of ores and
minerals" (45 FR 76619, November 19,
1980).
In response to the decision of the
District of Columbia Circuit Court of
Appeals in Environmental Defense Fund
v. EPA, 852 F.2d 1318. (D.C. Cir. 1988),
cert denied, 109 S.Ct. 1120 (1989), EPA
proposed criteria by which mineral
processing wastes would be evaluated
for continued exclusion from hazardous
waste regulation until the required
studies and subsequent regulatory
determination was made. On September
1,1989 (see 54 FR 36592). EPA provided
the final Bevill exclusion criteria.
Twenty mineral processing wastes were
conditionally retained within the scope
of the Bevill exclusion pending the
analysis of newly collected data. The
Bevill exemption was retained for the
following Five mineral processing
wastes, which will be studied in a
Report to Congress.
1. Slag from primary copper processing.
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Federal Register / Vol. 55. No. 15 / Tuesday, January 23. 1990 / Rules and Regulations 2323
2. Slag from primary lead processing.
3. Red and brown muds from bauxite
refining.
4. Phosphogypsiun from phosphoric acid
production.
5. Slag from elemental phosphorus
production.
All of the other mineral processing
wastes that wers permanently removed
from the Bevill exclusion by the
September 1,1989 rule are subject to
RCRA Subtitle C regulation if they are
solid wastes and exhibit one or more of
the characteristics of hazardous waste
as defined in 40 CFR part 231 or ire
otherwise listed as hazardous waste.
On September 25,1989 (54 FR 39298),
EPA Devaluated the status of the 20
conditionally retained wastes. Applying
the high volume and low hazard criteria
contained in the September 1,1989 final
rule, the Agency proposed to
permanently remove seven mineral
processing wastes from the Bevill
exclusion and retain 13 other mineral
processing wastes within the exclusion
for study in a Report to Congress. The
seven mineral processing wastes
proposed for removal from the Bevill
exclusion were:
1. Roast/leach ore residue from primary
chromite production:
Z. Process wastewater from coal
gasification:
3. Furnace off-gas solids from elemental
phosphorus production;
4. Process wastewater from hydrofluoric
acid production;
5. Process wastewater from primary lead
processing:
6. Sulfate process waste acids from
titanium dioxide production: and
7. Sulfate process waste solids from
titanium dioxidt production.
The 13 mineral processing wastes
proposed for temporary retention in the
Bevill exclusion were:
1. Casifier ash from coal gasification;
2. Calcium tuifatt wastewater treatment
plant sludge from primary copper processing:
3. Slag tailings from primary copper
processing;
4. Fluorogypsum from hydrofluoric add
production:
S. Air pollution control dust/siudg« from
iron blast furnaces:
6. Iron blast furnace slag;
7. Au pollution control dust/sludge from
lightweight aggregate production;
a Process wastewater from primary
magnesium production by the anhydrous
process;
9. Process wastewater from phosphoric
acid production;
10. Basic oxygen furnace and open hearth
furnace air pollution control dust/sludge from
carbon steel production;
11. Basic oxygen furnace and open hearth
furnace ilag from carbon steel production;
12. Chloride process waste solids from
titanium tetrachloride production: and
13. Slag from primary zinc processing.
The September 25,1989 notice also
proposed to modify the RCRA subtitle C
definition of "designated facility" for
purposes of clarifying the requirements
for completing hazardous waste
manifests for wastes transported from
one State where they are regulated as
hazardous to another in which they are
not regulated as hazardous. Under the
proposed modification, if a waste is sent
to an authorized Stats where the waste
is not regulated as hazardous, then the
designated facility must be a facility
allowed by the State to accept the
waste. The Agency solicited public
comments on the appropriateness of
these modifications as well as on the
data used to make the proposed Bevill
exclusion decisions.
D. Overview of Today's Rule
Today's final rule establishes the
status of 20 mineral processing wastes
which were proposed either for removal
from or retention in the Bevill exclusion
in the September 25,1989 notice of
proposed rulemaking (NPRM). In
addition, today's rule contains technical
corrections to the September 1,1989
final rule. Furthermore, today's final rale
also promulgates a clarification to the
definition of "designated facility" that
the Agency proposed on September 25,
1989.
This final rule completes the
rulemaking regarding the Bevill status of
mineral processing wastes until the
completion of the required report to
Congress and Regulatory Determination,
In establishing the current status for
these 20 mineral processing wastes, the
Agency has considered information
presented in public comment on the
September 25 proposal together with
additional analysis of previous EPA
industry survey and field data and.
where appropriate, has modified the
decisions.
As in the September 25 proposal, the
Agency evaluated the 20 mineral
processing wastes by applying the high
volume and low hazard criteria
contained in the September 1,1989 final
rule, using a three-step process. First,
the Agency applied the high volume
criteria to the available waste
generation data. For each waste, the
Agency obtained facility-specific annual
waste generation rates for the period
1983-1988 and calculated the highest
average annual facility-level generation
rate. Mineral processing wastes
generated above the volume criteria
thresholds (an average rate of 45,000
metric tons per facility for non-liquid
wastes, and 1,000,000 metric tons for
liquid wastes) passed the high volume
criterion.
In the second step, the Agency
evaluated each of the 20 wastes with
respect to the low hazard criterion using
the relevant waste characteristics. EPA
considered a waste to poae a low hazard
only if the waste passed both a toxicity
test (Method 1312) and a pH test.
The third step involved consolidating
the results from the first two steps to
determine the appropriate Bevitl status
of the 20 conditionally retained mineral
processing wastes. Applying these
criteria, the Agency is today removing
the Bevill exclusion for the following
five mineral processing wastes:
1. Furnace off-gas solids from elemental
phosphorus production.
2. Process wastewater from primary lead
processing.
3. Air pollution control dust/sludge from
lightweight aggregate production.
4. Sulfate process waste acids from
titanium dioxide production.
5. Sulfate process waste solids from
titanium dioxide production.
The following 15 mineral processing
wastes are to be retained within the
exclusion (in addition to the five already
retained in the September 1 rule),
pending preparation of a Report to
Congress and the subsequent Regulatory
Determination:
1. Treated residue from roasting/leaching
of chrome ore;
2. Casifier ash from coal gasification;
3. Process wastewater from coal
gasification;
4. Calcium sulfate wastewater treatment
plant sludge from primary copper processing:
5, Slag tailings from primary copper
processing:
9. Fluorogypsum from hydrofluoric acid
production;
f, Process wastewater from hydrofluoric
acid production:
8. Air pollution control dust/sludge from
iron blast furnaces:
9. Iron blast furnace ilag;
10, Process wastewater from primary
magnesium production by the anhydrous
process;
11. Process wastewater from phosphoric
acid production:
12. Basic oxygen furnace and open hearth
furnace air pollution control dust/sludge from
carbon steel production:
13. Basic oxygen furnace and open hearth
furnace ilag from carbon tteel production:
14. Chloride process waste solid* from
titanium tetrachloride production; and
IS. Slag from primary line processing.
Today's rule also contains technical
corrections to the September 1,1989
final rule. The Agency's review of the
final rule, as weU as public comments,
revealed slight differences between
portions of the regulatory language and
the corresponding discussion in the
preamble. As a result today's rule
includes minor editorial changes to the
Reproduced from
best available copy.
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2324 Federal Register / VoL 55. No. 15 / Tuesday. January 23. 1990 / Rules and Regulations
language of September 1 final rule.
These changes are fully described in
Section IL
In addition, EPA is promulgating a
clarification to the definition of
"Designated Facility" as defined in 40
CFR 28040. The Agency is amending
this definition for purposes of clarifying
the requirements for completing
hazardous waste manifests for wastes
transported from one State where they
are regulated as hazardous to another in
which they are not regulated as
hazardous. Today's clarification allows
such generators to ship the waste to a
facility in an authorized State in which
the waste is not yet regulated as
hazardous, as long as the facility
receiving the wastes is allowed by the
State to receive the waste. This rule also «
clarifies that it is the responsibility of
the generator to assure that any out-of-
state transporter and designated facility
sign the manifest form that accompanies
the waste shipment.
C. Future Activities
This rule establishes the boundaries
of the temporary exclusion from
hazardous waste regulations for mineral
processing wastes provided by RCRA
section 3001(bJ(3)(A){ii). All 20 mineral
processing wastes for which the Bevill
exclusion has been retained will be
subject to detailed study by EPA.1 The
findings of these studies will be
contained in a Report to Congress that
will be submitted by July 31,1990.
Six months after submission of this
report, the Agency will publish a
Regulatory Determination stating
whether or not any of the studied
wastes will be regulated under Subtitle
C of RCRA as hazardous wastes, or that
such regulation is unwarranted.
II. Analysis of and Response to Public
Comments on Bevill Status of 20 Mineral
Processing Wastes Proposed on
September 25,1989
This section summarizes and
discusses the comments received on the
September 25,1889 proposal. In general,
this discussion is limited to the issues
germane to the September 25th proposal
Comments on other issues are not
discussed here, except in • few
instances where the Agency believes it
is important to restate its position to
avoid confusion or misunderstanding in
the regulated community. The Agency
did review all of the comments received,
however, and comments not discussed
here are summarized in a background
document in the docket.
A. General Comments on EPA's
Application of the Final Bevill Criteria
1. Sources of Volume and Hazard Data
a. Volume Data. One commenter
argued that the volume data supporting
the proposed determinations of whether
proposed waste streams are high volume
lack adequate verification. Specifically,
the commenter contended that
tremendous discrepancies are evident
between the data provided by
commenters and the data reported from
the 1989 National Survey of Solid
Wastes from Mineral Processing
Facilities for the following four waste
streams: Coal gas process wastewater,
elemental phosphorous furnace off-gas
solids, lead process wastewater, and
titanium dioxide sulfate process waste
solids.
EPA agrees that some of the data
reported in the comments and the data
from the surveys that were used in
developing waste volume estimates for
the proposal are not in close agreement
As a result, in developing today's rule.
the Agency has relied almost
exclusively on data collected in the 1989
National Survey of Solid Wastes from
Mineral Processing Facilities, which was
conducted under RCRA Section 3007
authority, under the assumption that the
various respondents realize that
submission of false data is a punishable
offense. The Agency believes that these
are the most recent and accurate data
available.
Additional analysis of responses to
the surveys, carried out in response to
these comments, has indicated some
variability in the way in which
respondents interpreted the survey
instructions. In developing the proposed
rule. EPA relied primarily on the
responses to survey question 2.11 ("How
much of the special waste did this
processing unit generate in 1988?") to
derive the average facility waste
volumes. Additional review of the
survey responses has indicated that in
same instances the volume data that the
Agency expected to be reported in
response to question 2.11 were in fact
reported in other sections of the
questionnaire that requested
information related to waste treatment
plants, surface impoundments and other
waste management units (i.e., sections 4
through 8.) *
1 TheM Include the five wastes for which th*
temporary exclusion was retained in the September
1.1909 final ml* end th* IS wast** for which th*
exclusion i» rauioBd in today** rale.
• Thii occun raoit often for the flvt wnttt that
«r» covered by till* rukmiking (or whjch data wire
not specifically requested in th* survey. Apparently,
a number of facility open ton «Ui«r neglected to
read, misunderstood, at ignored th* instruction to
provide information on way waste that tliey
As a consequence, EPA has been
careful to select the response to the
appropriate survey question (which
sometimes is not question 2,11) in
developing today's final rule. For
example, the appropriate waste volume
data were sometimes provided in
response to question 4.18 ("What was
the quantity of sludge/solid outflows
from this wastewater treatment plant in
1988?"}, question 5.8 ("Approximately
how much cf the total amount of
accumulated sludge/solids in this
surface impoundment on December 31,
1988 was added during 1988?"), or
question 8.4 ("What were the inflows to
this waste management unit and what
was the quantity of each inflow in
1988?"}. In those cases where responses
to questions contained in sections 4
through 8 of the survey have been
selected for use by the Agency, the
responses are in much better agreement
with the data provided in comments. In
a number of cases, as discussed more
fully in section III, below, estimated
waste generation rates have been
revised, and in fact in a few instances,
the Agency's evaluation of whether
particular waste streams comply with
the high volume criterion has been
reversed. Documentation addressing the
Agency's calculation of waste volumes
can be found in the docket supporting
this final rule.
The commenter also criticized the
Agency for liberally panting
Confidential Business Information (CBI)
designations to responses submitted by
industry respondents to the National
Survey. These designations, they
claimed, have impeded independent
verification of the volume data, noting
that for residue from roasting/leaching
of chrome ore and titanium dioxide
sulfate process waste acids, all of the
facilities generating these waste streams
designated their relevant survey data as
CBI. The commenter stated that if the
public is unable to scrutinize these data
because of their confidentiality, then the
Agency should make a professional
verification of the information provided.
Under the provisions of section 3007
of RCRA, facilities providing
information to EPA can designate
information, in whole or in part as CBI.
EPA has not automatically granted
claims for CBI status. Rather, EPA
reviewed the CBI claims made for data
submitted by mineral processing
facilities in support of this rulemaking
and, when claims for CBI status
appeared excessive, requested, often
successfully, that the CBI claims be
considered eligible for BeviH ttarut, irrespective of
whether it was on EPA'i preliminary list.
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Federal Register / Vol. 55. No. 15 / Tuesday, January 23. 1990 / Rules and Regulations 2325
reduced or eliminated. In addition, EPA
has included aggregated CBI data in the
publicly available documentation
supporting the development of today's
rale to the extent that this could be done
without revealing company-specific CBI
information.
As disc-assad above, facilities that
submit either CBI or non-CBI data
requested by EPA under RCRA 3007
authority are subject to enforcement
action if they submit false data. As a
result, the Agency believes that data
collected under Section 3C07 authority
can be relied upon without additional
verification, regardless of whether it is
CBI or not. In addition, as a practical
matter, the schedule requirsd by the
Appeals Court for this ruleoaakkt.g did
not provide ths time needed to conduct
such verification.
One cornmenter stated that for some
of the wastes of interest, EPA volume
determinations are based on a fraction
• of those facilities generating the waste.
As a result, the commenter contends,
EPA lacks a sufficient basis for
determining whether proposed wastes
meet the high volume criterion. In
instances where EPA lacks data on
more than 25 percent of the facilities
generating the waste, the commenter
believes that EPA should not make a
volume determination without
determining whether the facilities
providing the volume data are
representative of the industry; the
Agency should also attempt to obtain
data on the remaining facilities. The
commenter maintained that in the
absence of survey data, EPA should not
rely completely upon data provided in
public comments.
EPA responds that, as dicussed above
and in more detail in Section HI of this
preamble, further analysis of the survey
data has shown that the survey
responses do in fact provide adequate
waste volume data for all but one of the
20 mineral processing wastes covered
by today's rulemaidng. With the
exception of this one waste, waste
volume data are available in the survey
for far more than 25 percent of the
facilities generating the waste. For the
one waste with limited data available in
the survey, basic oxygen furnace and
open hearth furnace air pollution control
dust/sludge from carbon steel
production, data provided by the
American Iron and Steel Institute (MSI)
were used for the volume determination.
These data were verified through
comparison with the survey data that
were provided for several of the
facilities for which AISI also provided
volume data.
b. Hazard Data. Several conunenters
argued that the Agency used too few
samples, especially when results were
inconsistent, or neglected to sample
inactive facilities for determining the
hazard of waste streams. As a result the
ccmmenters argued, the samples were
not representative of the entire industry.
Other commenters contended that many
inconsistencies in the waste sampling
data were overlooked in making
proposed exclusion decisions.
EPA responds that as clearly stated
in the September 25,1988 NPRM. the
low hazard criterion was established in
the September 1,19G9 final rule and is
not subject to public comment at this
time. For further discussion of tho
development and application of the low
hazard criterion, refar to 54 FR 36592. In
applying the final Sevill low hazard
criterion, EPA has not ignored any
apparent inconsistencies or widely
varying concentrations. The low hazard
criterion is applied ur.ing the lower 80
percent confidence interval that, as a
practical matter, allows for one or more
samples to exhibit contaminant
concentrations above relevant
standards, without disqualifying the
waste for Bevill status. Inactive facilities
were not sampled because they are
affected by today's rulemaMng only if in
the future they resume operation or
actively manage historical
accumulations of wastes for which the
Subtitle C exemption is being removed
by today's rule. The Agency believes
that it would be inappropriate and
impractical to consider these
speculative future activities in
developing today's rule (For further
discussion see 54 FR 36595-36597.)
Another commenter disputed EPA's
use of data submitted by waste
generators for the low hazard
determinations, stating that the use of
these data contradicts the criteria set in
the September 1.1989 rule.
As explained in the preamble to the
September 1,1989 final rule, EPA
established that low hazard
determinations are to be based on EPA
Method 1312 data unless
i. The wasto is generated at five or mar*
facilities; aad
ii. Substantial additional relevant data or*
available and the prepaadaruc* of then
additional data indicate that the waste
should be considered low hazard, where;
a. Relevant data an defined as data that
result from analysis of wasta extracts
obtained by EPA Methods 1310,1311, and
1312. ASTM Teat Method 03887-81, or
comparable procedures that Agency has
reason to believe product reliubk and
representative data: aad
b. To be considered substantial, th»
additional data mu*t charmclanza the wait*
at 3 plants (other than thot« two planta
where Method 1312 results axea*d 100 time*
the MCLa] or at least half of the facilities that
generate the waste [other than those tvro
plants where Method 1312 results exceed 100
times the MCLs), whichever number of plants
is larger. (54 FR 36630)
The Agency wishes to point out that
there is no explicit or implicit
assumption in this low hazard criterion
about the source of the data that the
Agency is to use in making low hazard
determinations. Accordingly, EPA has
used available Method 1312 data
regardless of source {e.g., EPA, industry)
in making low hazard dsteirminations in
today's rule (and, indeed, the September
25. 19S9 proposal).
B. Consents -J.T '.he 13 Waste Sl'sanis
Proposed fcr Retention
This saction discusses comments
received on each of the 13 mineral
processing wastes for which EPA
proposed to retain the Bevill exemption;
The comments received on each of the
wastes generally are presented under
one of three subheadings: Processing
Criterion/Waste Definition, Volume, or
Hazard. These subheadings appear only
when they are relevant to comments
identified for the waste being discussed,
so for many of the 13 wastes, one or
mere of the subheadings are not
included.
1. Gasifier Ash From Coal Gasification
One commenter supported EPA's
proposed retention of gasifier ash from
coal gasification within the Bevill
exclusion.
2. Calcium Sulfate Wastewater
Treatment Plant Sludge From Primary
Copper Processing
One commenter agreed with EPA's
proposed determination that calcium
sulfate wastewater treatment plant
sludges from primary copper processing
are high volume, low hazard materials
and. thus, qualify for the Bevill
exclusion and further study.
o. Processing Criterion/Waste
Definition, One commenter asserted that
no rational basis exists for
distinguishing between calcium sulfate
and sodium hydroxide sludges, arguing
that both are generated in identical
treatment plants, and both are
reprocessed in the primary copper
processing operation to recover
additional copper. The commenter
indicated that the only difference
between the two sludges is the type of
reagent used [lime or sodium hydroxide)
to neutralize acidic aqueous streams
that enter the treatment plants. The
commenter reasoned that the only
explanation for this disaggregation is the
amount of sludge resulting from use of
the different neutralizing reagents.
Reproduced from
best available copy.
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2328 Federal Register / Vol. 55, No. 15 / Tuesday, January 23. 1990 / Rulea and Regulations
The Agency has considered the
comment and finds these arguments
unconvincing. EPA believes that tha
type of reagent used is an important
factor in determining the chemical
nature and quantity of the sludge
generated. As explained In the preamble
to the April, 1989 proposed rule (54 FR
15316), EPA believes that there are
significant differences between these
materials, and accordingly, has retained
this distinction in today's final rule.
b. Volume. Three commenters
addressed the volume data for this
waste. One commenter agreed with
EPA's determination that calcium
sulfate wastewater treatment plant
sludge meets the high volume criterion.
Another commenter contended that all
wastewater treatment plant sludga from
primary copper processing should ba
studied under the ievill Amendment. If
the generation rates for calcium sulfate
and sodium hydroxide sludges are
added, they noted, the resulting average
is above the 45.COO metric ton per year
cutoff. The third commenter claimed
that public comment data submitted by
waste generators and survey data for
those same wastes are not consistent
The third commenter noted that In
public comments, industry submitted an
average annual generation rate for
calcium sulfate wastewater treatment
plant sludge from primary copper
processing of 75,750 MT/yr (comments
of Kennecott Utah Copper on October
20,1988 NPRM), while according to
EPA's survey data, the average
generation rate for this waste stream
was 1,179,341 MT/yr. Because these
data are not in agreement the third
commenter concluded that all of the
volume data are suspect especially
when EPA had previously estimated an
annual generation rate of 38,033 MT/yr,
a volume that would not have supported
a high volume determination.
The Agency agrees that the volume
data cited by the commenter appear to
be inconsistent The Agency has
reviewed the survey data and found that
these apparent inconsistencies arise
from the fact that appropriate waste
volume data sometimes were reported in
sections 3 through 0 of die
questionnaire, rather than section 2.
which was used to develop average
volume data for the proposed rule. As a
result these differences have since been
resolved and are explained in Section
01, below, and a background document
in the docket which present the
Agency's revised waste generation
estimates. Finally, EPA's previous
volume estimate of approximately 35,000
MT/yr average per facility wa* based
on an aggregation of calcium sulfate and
sodium hydroxide sludge, which the
Agency has concluded is
inappropriate. *
c. Hazard. Two commenters
addressed the hazard level of calcium
sulfate wastewater treatment plant
sludge from primary copper processing.
One agreed with EPA's proposed
determination that the waste meets
EPA's low hazard criterion. However,
another commenter asserted that EPA's
sampling data demonstrated that
calcium sulfate wastewater treatment
sludge from primary copper processing
exhibits the hazardous waste
characteristic of EP-toxicity for arsenic,
cadmium, and selenium, and questioned
why it was not proposed for removal
from the Bevill exclusion on that basis
alone.
EPA finalized the low haaard criterion
In the September 1,1989 nils, and is not
entertaining comments on It The
Agency's rationale for the low hazard
criterion is outlined in 54 FR 36592. As
discussed in the September 25,1989
proposal, the waste does not exhibit
levels of toxic constituents above those
established by the September 1,1989
final rule.
3. Slag Tailings From Primary Copper
Processing
Two commenters supported EPA's
proposed retention of slag tailings from
primary capper processing for further
study, asserting that EPA properly
determined the waste to be high volume
and low hazard.
a. Processing Criterion/Waste
Definition. One commenter stated that
at its facility, slag tailings are produced
when the ore input to the mill is
supplemented with slag from the
facility's primary copper smelting
operations. Because the slag tailings
cannot be differentiated from the ore
tailings, the commenter arguns that the
Bevill exemption, as either a processing
waste or • beneficiation waste, should
be retained for the slag tailings.
While EPA plans to study copper slag
tailings in a report to Congress, EPA
disagrees with the commenter'•
contention that the fact that tha waste is
generated in combination with a
beneficiation waste ia relevant to the
decision that inclusion in the report to
Congress is appropriate. The Agency
has decided to include this waste in the
report to Congress because it is a
* Availabln data indicato that sludge n*ulting
from tnatmant of waitawalen from primary copper
proestsing uimg todium hydroxide ii jmanted ia
much innllgr volume* than calcium iul/jt« i!udg»t
miuJUng from treatment with lime. A* * mult. «o
average annual iludg* voluma that Include* both
type* of tlutigw ia iignificanily lowe* Ulna on* thai
ia bated only on calcium lulmt* iludi;4.
mineral processing waste that Is both
high volume and low hazard according
to the criteria previously established.
The Agency will, however, examine tha
current practices that involve co-
management of a beneficiation waste
and a mineral processing waste in the
report to Congress.
b. Volume. Three commenters
concurred that slag tailings from
primary copper processing meet EPA's
high volume criterion. One commenter
submitted complete volume data for this
waste stream in the Survey, stating that
it generates mors than a million metric
tons per year of the waste stream.
Another commenter claimed that about
3,700,000 short tons of tailings, of which
approximately 22,000 short tons were
slag tailings, were generated by its
facility.
4. Air Pollution Control Dust/Sludge
From Iron Blast Furnaces
One commenter asserted that the
Agency's proposal for retention of iron
and steel industry wastes within the
Bevill exclusion is fully supported by the
data. These wastes are mineral
processing wastes, and they meet the
criteria as high volume, low hazard
wastes,
5. Iron Blast Furnace Slag
Oaa commenter asserted that tha
Agency's proposal for retention of iron
and steel industry wastes within the
Bevill exclusion is fully supported by the
data. These wastes are mineral
processing wastes, and they meet ths
criteria as high volume, low hazard
wastes.
8, Basic Oxygen Furnace and Open
Hearth Furnace Air Pollution Control
Dust/Sludge From Carbon Steel
Production
One commenter asserted that the
Agency's proposal for temporary
retention of iron and steel industry
wastes within the Bevill exclusion is
fully supported by the data. These
wastes are mineral processing wastes,
and they meet the criteria as high
volume, low hazard wastes.
One commenter argued, however, teat
EPA's volume data is incomplete,
because for some wastes, the volume
determinations are based on only a
fraction of the facilities generating the
waste. In the case of basic oxygen and
open hearth furnace APC dust/sludge
from carbon steel production, the
commenter maintained that EPA based
its volume determination on data from
only four of 27 facilities. The commenter
argued that the Agency made no effort
to determine if these few facilities were
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DIR. No. 9541.00-14
Federal Register / Vol. 55, No. 15 / Tuesday, January 23, 1990 / Rules and Regulations 2327
representative of the industry in general.
or if the facilities were unusually large
or email and would skew the data.
In response to this comment, EPA has
carefully reviewed all data available
from the industry survey and from other
sources. The Agency's revised waste
generation estimate (presented in
Section III, below), is based upon data
obtained from the vast majority of
active carbon steel facilities. These data
show that this is a high volume waste.
7. Basic Oxygen Furnace and Open
Hearth Furnace Slag From Carbon Steel
Production
One commenter asserted that the
Agency's proposal for temporary
retention of iron and steel industry
wastes within the Bevill exclusion is
fully supported by the data. These
wastes are mineral processing wastes,
and they meet the criteria as high
volume, low hazard wastes.
8. Fluorogypsum From Hydrofluoric
Acid Production
a. Volume. One commenter agreed
with EPA's proposed determination that
fluorogypsum from hydrofluoric acid
production meets the high volume
criterion.
b. Hazard. One commenter agreed
with EPA's proposed determination that
fluorogypsum meets the low hazard
criterion.
9, Air Pollution Control Dust/Sludge
From Lightweight Aggregate Production
a. Volume. One commenter argued
that EPA's volume data are incomplete,
because for this waste, the volume
determination was based on only a
fraction of the facilities generating the
waste. The commenter maintained that
EPA based its volume determination for
lightweight aggregate APC dust/sludge
on data from only six of the 28 facilities
it believes to generate the waste. The
commenter argued that the Agency
made no effort to determine if these few
facilities were representative of the
industry.
In response to this comment EPA has
carefully reviewed all data available
from the industry survey and from other
sources. The Agency's revised waste
generation estimate (presented in
Section m, below), is based upon data
obtained from the majority of active
lightweight aggregate production
facilities. These data show that this is
not a high volume waste.
10. Process Waste water From Primary
Magnesium Production by the
Anhydrous Method
a. Hazard. One commenter questioned
EPA's decision not to propose for
removal from the Bevill exclusion
process wastewater from primary
magnesium processing by the anhydrous
method even though EPA's sampling
demonstrated that the waste exhibits
the hazardous waste characteristic of
cortosivity {pH level of 1.22). EPA
should, they contended further consider
this data in preparing its Report to
Congress.
The Agency generally agrees with the
commenter that relevant hazard data
should be considered in the study of the
waste stream when preparing the Report
to Congress. However, EPA finalized the
low hazard criterion in the September 1,
1989 rule, and is not currently
entertaining comments on it. The
Agency's rationale for the low hazard
criterion is outlined in 54 FR 38S92. As
discussed in the i/25/89 proposal, the
waste does not exhibit a pH below the
Bevill hazard criterion value of 1. •
11. Process Wastewater From
Phosphoric Acid Production
Four commenters stated that EPA
correctly proposed that process
wastewater from phosphoric acid
production be retained within the scope
of the Bevill Amendment and that EPA
should retain this waste within the
Bevill exclusion in the final rule.
a. Processing Criterion/Waste
Definition. One commenter argued that
process water recirculated in the
phosphate complex including the
gypsum stacking system, is not
discarded. Process water's nutrient
value, which is extracted for fertilizer
products, and its utilization as a coolant
and transport medium, are not activities
that should cause it to be classified as a
solid waste as defined by the Resource
Conservation and Recovery Act
EPA responds that the definition of
solid waste is an issue that is not open
for comment in connection with today's
rulemaking. EPA wishes to point out
however, that the issue of when cooling
water is a solid waste has been
discussed in previous rulemakings.
Specifically, in the preamble to the
January 4,1985 (50 FR 614) final rule that
established the current definition of
solid waste, the Agency indicated that
cooling water managed entirely in •
closed-loop system was not considered
to be reclaimed and, thus, would be
eligible for the closed-loop exclusion.
The Agency also Indicated, however,
that secondary materials managed in
impoundments would not be eligible for
the closed-loop exclusion. In addition,
the surface impoundments collecting
cooling water off of gypsum stacks •»
waste treatment units, further indication
that the contents «ra solid wastes.
(i) Comments on phosphogypsum
transport water. One commenter
supported EPA's inclusion of the water
used to transport phosphogypsum within
the definition of process wasttwater
from phosphoric acid production.
(ii) Comments on stack runoff. Three
commenters argued that "stack runoff*
should be included in the definition of
process wastewater from phosphoric
acid production. One commenter
maintained that stack runoff is
comprised of "phosphogypsum
transport" water, which is specifically
included in the definition of process
wastewater from phosphoric acid
production. The commenter further
stated that the definition of process
wastewater from phosphoric acid
production, which includes "several
points in the wet process," is intended to
include all process wastewater
generated at all points within that
process. A second commenter reasoned
that just as process wastewater
managed in a pond that receives
precipitation continues to be process
wastewater, gypsum transport water
that is temporarily trapped within a
gypsum stack and receives precipitation
continues to be gypsum transport water.
The commenter also indicated that
because runoff from dry stacks is not
hazardous, and as runoff from wet
stacks contains transport water which
has been retained, stack runoff should
also be retained within the Bevill
Amendment
One commenter noted that comments
from previous rulemakinga and other
documents may have led to the incorrect
impression that phosphogypsum stack
runoff standing alone exhibits
characteristics of hazardous waste. The
commenter also indicated that they
believe the Agency has resolved this
issue satisfactorily, however, by
including water used for
phosphogypsum transport in the
description of phosphoric acid process
wastewater included in the proposed
rule. The commenter further concluded
that because only the phosphogypsum
transport water entrained in
precipitation runoff from
phosphogypsum stacks ever exhibits
characteristics of hazardous waste,
EPA's proposal to include
phosphogypstun transport water within
the scope of the Bevill Amendment
resolves the issue of the status of
precipitation runoff.
(lit) Comments on uranium recovery
wastewater. Commenters noted that the
uranium recovery step of phosphoric
acid production follows the reaction of
phosphate rack and sulfuric acid and
precedes the concentration and
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2320 Federal Register /Vol. 55, No, 15 / Tuesday, January 23, 1990 / Rules and Regulations
purification steps required to produce
commercial grade, also known as
merchant grade, phosphoric acid. Two
commenters argued that the process
wastewater generated from tha uranium
recovery step of phosphoric acid
production must be considered a
component of "process wastewater from
phosphoric acid production" and, thus,
proposed it for retention within the
BeviH Amendment,
(iv) Comments on process wastewater
from animal feed production. Two
commenters maintained that process
wastewater from animal feed production
should be included in the definition of
process wastewater from phosphoric
acid production and thus retained in the
Bevill exclusion. One commenter
claimed animal feed process
wastewater, standing alone, meets the
Agency's high volume ond low hazard
criteria. This commenter further argued
that the production of animal feed
constitutes mineral processing, citing the
following reasons: (1) Three key animal
feed ingredients (dicalcium phosphate,
mono- and dicnlciam phosphate, and
defluorinated phosphate rock) are
produced from bermfimation of either
phosphate rock or limestone; (2)
processing removes and/or enhances
the characteristics of either benefieiated
phosphate rock or limestone; (3) none of
the materials used is a scrap material;
(4) the processes produce final mineral
products; and (5) no combination with
non-mineral products is involved.
Therefore, the commenter argued,
process wastewater from such
production should be retained within the
scope of the Bevill Amendment.
The commenter also addressed
several aspects of the production
process. The commenter argwed that the
defluorination step in animal feed
production should not prevent process
wastewater from animal feed production
from remaining within the Bevill
exclusion. The production of
defluorinated phosphoric acid involves
essentially the same process as the
production of undcfluorinated
commercial grade phosphoric acid.
Defluorination is only an additional step
in acid production in which fluorides are
removed from the acid by heat and the
addition of a silicon mineral to facilitate
removal of fluorine. No meaningful
distinction can or should be made
regarding defluorinated phosphoric acid
simply because defluorination occurs
before or after concentration to
commercial grade strength.
The commenter further argued that
the production of monoammonium
phosphate, an animal feed product,
constitutes mineral processing, even
though the process makes use of
ammonia, a non-mineral ingredient. The
commenter indicated that ammonia is
added to defluorinated commercial
grade phosphoric acid in a granulation
process, involving approximately 7,000
gallons per minute of phosphoric acid
production process water for particulate
scrubbing. The commenter maintained
that this amount of water is
"infinitesimal" compared to the mineral
processing process wnstewatcr
generated on a daily basis, and thus this
small granulation process should be
considered co-management and
monoammonium phosphate process
wastewater should be included within
the Bevill exclusion of phosphoric acid
process wastewater.
The commenter maintained that, if
EPA determined that returning to its
source the 7,000 gallons per minute of
phosphoric acid process wnstewater
used during feed grade monoammonium
production would result in the removal
of the entire phosphoric acid process
wastewater system from the Bevill
Amendment, the production of feed
grade monoammonium phosphate would
be ceased and the product removed
from the market,
(v) Comments on superphosphate
waatewater. One commenler contended
that process wastewater from
superphosphate production should be
retained within the scope of the Bevill
Amendment. The commenter argued
that data submitted by industry in the
mineral processing survey demonstrates
that this waste from superphosphate
production meets the high volume and
low hazard criteria. In addition, the
commenter claimed that superphosphate
production meets the relevant aspects of
the EPA mineral processing definition,
stating that the production of
superphosphate rock involves the direct
reaction of phosphate rock with dilute,
not merchant grade, phosphoric acid,
(vi) Comments on ammoniated
fertilizer wastewater. Two commenters
argued that process wastewater
generated in the production of
ammoniated phosphate fertilizers (APF)
should be retained within the scope of
the Bevill Amendment. The inclusion of
phosphoric acid process wastewater
within the scope of the Bevill
Amendment should, they contended,
resolve the issue of whether APF
process wastewater is included. The
influent water to the ammoniated
phosphate fertilizer process is the
process wastewater from phosphoric
acid production, which remains under
the Bevill exclusion. The commenter
claimed that if APF process wastewater
exhibits hazardous characteristics, it is
solely because process wastewater from
phosphoric acid production is used in
APF production. The commenter further
argued that the entire APF production
process should not be removed from the
Bevill exclusion, when the cause of the
hazardous characteristic is phosphoric
acid wastewaler, which is covered
under the Bevill exclusion.
(vii) Comments on sulfuric acid
wastewater. One commenter contended
that captive sulfuric acid production
involves mineral processing and Is
absolutely essential to the production of
phosphoric acid by the wet process. The
commenter urged EPA to either clarify
that sulfuric acid wastewater produced
as a result of sulfuric acid production is
part of phosphoric acid process
wastewater or revise its interpretation
of the mixture rule so that such process
wastewater can continue to be managed
In the sound and cost-effective manner
practiced today.
(viii) Response to Comments. In the
proposal, EPA noted that process
wastewaters are generated at several
points in the wet process, included
phosphogypsum transport, phosphoric
acid concentration, and phosphoric acid
temperature control and cooling. [See 54
FR 30303.) As staled previously, the
Agency did not intend to imply that
these were the only sources of process
wastewater from phosphoric acid
operations.
The Agency has carefully considered
the comments and, based on the
information available, agrees, for the
reasons described in the comments, that
phosphogypsum stack runoff, process
wastewater generated from the uranium
recovery step of phosphoric acid
production, process wastewater from
animal feed production (including
defluorination but excluding
ammoniated animal feed production),
and process wastewater from
superphosphate production are also the
result of mineral processing operations
and should be considered part of
process wastewater from phosphoric
acid production.
As discussed on September 1 (see 54
FR 36621), the Agency does not consider
the production of ammoniated
phosphate fertilizer from phosphoric
acid and ammonia to be a mineral
processing operation. For the same
reasons, the Agency does not consider
the production of ammoniated animal
feed from phosphoric acid to be a
mineral processing operation. As also
discussed on September 1 (see 54 FR
36623), the Agency does not consider
wastes from sulfuric acid production to
be part phosphoric acid process
wastewater.
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OSWER DIE. No. 9541.00-14
Federal Register / Vol. 55, No, 15 / Tuesday^ January 23. 1990 / Rules and Regulations 2329
b. Volume. A commenter stated that
the data collected by the Agency at its
facility and similar facilities indicate
that the process wastewater meets
EPA's high volume criterion.
c. Hazard. Two commenters
addressed the hazard level of this
waste. One supported EPA's proposed
determination that process wastewater
from phosphoric acid production meets
the low hazard criterion. However, one
commenter questioned why the waste
stream was not proposed for removal
from the Bevill exclusion because EPA'a
sampling data showed that process
wastewater from phosphoric acid
production exhibits the hazardous waste
characteristic of corrosivity fpH values
of 2.0, 2.1,1.8. and 1.5). EPA should, they
maintained, further consider this data in
preparing its Report to Congress.
The Agency generally agrees with the
commenter that relevant hazard data
should be considered in the study of the
waste stream when preparing the Report
to Congress. However, EPA finalized the
low hazard criterion in the September 1,
1983 rule, and is not entertaining
comments on it. The Agency's rationale
for the low hazard criterion is outlined
in 54 FR 36592. The waste passes the pH
criterion described in that rule.
12. Chloride Process Waste Solids From
Titanium Tetrachloride Production
One commenter agreed with EPA's
proposal to retain chloride process
waste solids from titanium tetrachloride
production within the Bevill exclusion.
a. Processing Criterion/Waste
Definition. One commenter claimed that
EPA. in its description of the "chloride
process waste solids from titanium
tetrachloride production" in the
proposal, described only the "chloride"
process for manufacturing titanium
dioxide and not the "chloride-ilmenite"
process. The Agency stated that "the
chloride process involves fluidized
roasting and chlorinarion of rutile,
synthetic rutile, slag or beneficiated
ilmenites." This statement, according to
the commenter, essentially describes the
"chloride" process that uses "high-
grade" ores or beneficiated ores as
feedstocks; the chloride-ilmenite
process, in contrast, uses "low-grade"
ores as the principal feedstock for its
process.
In addition, the commenter contended,
the Agency incorrectly stated that the
product formed is "titanium
tetrachloride." This may be true of the
"chloride" process that uses "high-
grade" ores or previously beneficiated
material, but is only partially true of the
chloride-ilmenite process. In the
"chloride-ilmenite" process, the
commenter continued, gaseous iron
chlorides are generated first and are
subsequently condensed into iron
chloride "waste acids". This is the
"beneficiation" process. After this, the
titanium in the ores is converted at a
much slower rate into titanium
tetrachloride. Both of these processes.
however, occur in a continuous, "one-
step" operation. The titanium
tetrachloride generated by the chloride-
ilmenite process is then used as the
feedstock for the ultimate production of
titanium dioxide. The commenter
expressed concern that EPA appears to
incorrectly consider the "chloride-
ilmenite" process to be covered within
the "chloride process," for which the
"mining waste exclusion" was
eliminated for "chloride processing
waste acids" in the September 1,1989
final role. The commenter objected to
this conclusion because the chloride-
ilmenite process should not be "lumped"
with a process that is clearly and
substantially different, noting that the
distinction between the two processes
has been recognized since at least 1970.
The commenter claimed that its titanium
dioxide plants could be materially and
adversely affected by EPA's
determinations regarding whether or not
"chloride-ilmenite" plants are
considered "beneficiation" versus
"processing" facilities. The commenter
also claimed its "chloride-ilminte"
process is not covered by either of the
Agency's rulemakings (Sept l and Sept.
25,19B9), and thus would be covered by
an upcoming "special study" for
beneficiation wastes. The commenter
urged EPA to make a determination that
the "chloride-ilmenite" process is one of
beneficiation of low grade iknenite ore
and "chlorination" and should be made
subject to the upcoming RCRA 8002(p)
special studies to determine the
appropriate waste management
requirements.
In response to these comments, EPA
reviewed the court opinions and related
EPA effluent limitation guidelines cited
by the commenter for precedents for
considering the chloride-ilmenite
process to be significantly different from
the conventional chloride process. The
Agency also referred to written
comments submitted by the same
commenter in response to previous
proposed rulemakings addressing the
scope of the Mining Waste Exclusion.
Based upon this review. EPA agrees
with the commenter that the chloride-
ilmenite process is different than the
conventional chloride process in that
ilmenite ore used as the feed stock to
the process contains much larger . .
quantities of iron, which must be
removed, than the feed stocks used by
other chloride processes. In addition.
EPA agrees that, in part, the chloride-
ilmenite process involves beneficiation
of ores or minerals. Nevertheless, the
Agency continues to believe that it is
reasonable to consider the chloride-
ilmenite process to be a part of the
general "chloride process" category for
purposes of this rulemaking because the
process destroys the identity of the
mineral, produces titanium tetrachloride
gas (a saleable mineral product), and
generates wastes which are functionally
identical to, although larger in volume
than, the wastes generated by other
chloride process facilities. Moreover,
because the "beneficiation" wastes and
the "processing" wastes generated by
the chloride-ilmenite process are
inseparable, according to EPA effluent
guidelines development documents and
as argued by the commenter, the Agency
concludes that the "chloride-ilmenite"
process must be considered a mineral
processing operation for purposes of this
rulemaking.
The Agency also notes that the
commenter's contention that the
"chloride-ilmenite" process is not
covered by the description of the
chloride process provided in the
September 1.1989 final or the September
25,1989 proposal is incorrect. While the
description of the chloride process
provided in these rules does not
describe the "chloride-ilmenite" process
in detail due to Confidential Business
Information claims made by the
commenter, the Agency has clearly
considered this process to be one of the
several chloride processes covered by
these previous rulemakings and.
therefore, this rulemaking as well. This
fact is clearly demonstrated by the
inclusion of the commenter's facilities in
the background documentation for these
rulemakings. Accordingly, all solid
wastes generated by this process are
subject to EPA's reinterprets tion of the
Mining Waste Exclusion, including this
rulemaking.
b. Volume. One commenter agreed
with EPA's determination that chloride
process waste solids satisfy the high-
volume criterion. Another commenter
submitted volume data, claiming that
the waste streams from the "chloride-
ilmenite" process are generated at over
1,400,000 and 600,000 tons annually in
two facilities.
c. Hazard, One commenter agreed
with EPA's determination that chloride
process waste solids satisfy the low-
hazard criterion,
13. Slag From Primary Zinc Processing
One commenter asserted that EPA
properly applied the high volume/low
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2330 Federal Register / Vol. 55. No. 15 / Tuesday, January 23. 1990 / Rules and Regulations
hazard criteria to slag from primary zinc
processing in the September 25 proposal.
a. Hazard. One commenter questioned
EPA's decision not to propose to remove
slag from primary zinc processing from
the Bevill exclusion because the
sampling data demonstrated that the
waste exhibits the hazardous waste
characteristic of EP-toxicity for lead.
They stated that EPA should further
consider these data in preparing its
Report to Congress.
The Agency generally agrees with the
commenter that all relevant hazard data
should be considered in the study of the
waste stream when preparing the Report
'o Congress. However, EPA finalized the
low hazard criterion in the September 1,
1989 rule, and is not currently
entertaining comments on it The
Agency's rationale for the low hazard
criterion is outlined in 54 FR 3§S92. As
discussed in the September 25,1989,
proposal, the waste passes the toxicity
criterion described in that rale.
C. Comments on the Seven Wastes
Proposed far Removal
This section discusses comments
received on each of the seven mineral
processing wastes for which EPA
proposed to remove from the Bevill
exemption. The comments received on
each of the wastes generally are
presented under one of three
subheadings: Processing Criterion/
Waste Definition, Volume, or Hazard.
These subheadings appear only when
they are relevant to comments identified
for the waste being discussed, so for
many of the seven wastes, one or more
of the subheadings are not included.
l. Roast/Leach Ore Residue From
Primary Chromite Processing
a. Processing Criterion/Waste
Definition. Two commenters remarked
on the designation of the waste stream.
One commenter contended that the
original designation of roast/leach ore
residue from primary processing of
chrome ore referred to the ore residue
solids in the form currently being
disposed (after treatment), not the form
in which the waste is generated. The
commenter stated that it is the waste as
disposed that has the potential to enter
the environment, and that this waste is
low hazard and high volume and should
be retained. Another commenter argued
that because the ore used in production
of chromium chemicals contains not
only chrome but also other compounds
(e.g., magnesium silicate), the term
"chrome ore" or "chromium ore" would
be more appropriate for use by the
Agency.
EPA agrees with both of these
comments. la today's final rule, the
Agency bases its evaluation of this
waste's compliance with the Bevill
criteria on treated residue from
roasting/leaching of chrome ore.
b. Hazard. Three commenters
addressed the apparent failure of this
waste stream to meet the low hazard
criterion. One commenter agreed with
EPA's proposed determination, and
provided data that indicated that treated
waste from chromite ore processing is
occasionally EP toxic, based on data it
received from American Chrome and
Chemical.
One commenter acknowledged that
residue from the roasting/leaching of
chrome ore is hazardous at the point of
generation. The commenter asserts,
however, that through treatment at the
wastewater treatment plant in
compliance with the facility's NPDES
permit, the waste stream ceases to
exhibit the hazardous waste
characteristic for chromium; both the
liquid and non-liquid fractions of the
stream are rendered non-hazardous. The
commenter states that this treatment
practice has been demonstrated to, and
accepted by, the State of North
Carolina.
Another commenter maintained that,
in making its hazard determination for
this waste, EPA relied on samples taken
from an inappropriate stage of the waste
management process. The commenter
claimed that die materials from the post-
treatment stage, and in particular the
solids, are non-hazardous and qualify
for the exclusion. In addition, they
contended, this treatment does not
affect the volume of the waste.
The Agency has reviewed the
available data and agrees with the
commenters that these data indicate
that the treated residue from roasting/
leaching of chotne ore is low hazard.
The Agency notes, however, that waste
management activities associated with
the untreated wastes, including the
treatment operation itself, are not
exempted from Subtitle C requirements
by the Bevill amendment because prior
to treatment the waste ia not low hazard
(although any tanks involved in the
treatment process may qualify for the
wastewater treatment until exemption
under 40 CFR 2&4.1(g)(6)J.
2. Process Wastewater From Coal
Gasification
o. Processing Criterion/Waste
Definition. One comenter described the
production process for coal gasification.
The production of coal gas (and thus
process wastewater) involves, first, the
controlled combustion of lignite. This
produces a raw gas stream sent first to
the Raw Gas Cooling and Shift
Conversion units and then to the
Rectisol unit. The Rectisol unit removes
acid gases COi. HjS, CS». and COS) and
produces synthetic fuel gases. These
gases undergo methanation and gas
compression and then are delivered to a
pipeline as synthetic natural gas A
coproducl. naphtha, is also produced.
"Gas liquor" is also produced by the
cooling and refining of the raw gas
stream.
The commenter added that the
Gasification, the Raw Gas Cooling Shift
Conversion, and the Rectisol units all
produce gas liquor streams which are
routed to the Gas LJquor Separation
unit. During the gas liquor separating
process, another coproduct, tar oil. is
recovered. Afterwards, the gas liquor is
sent to the Phenosolvan unit where
crude phenol is recovered. Ammonia is
then recovered in the Phosam unit,
which discharges a "stripped gas
liquor." The stripped gas liquor is sent to
the Cooling Tower for use as a make-up
water. Other liquids used as make-up
water include: small quantities of
filtered Dissolved Air Flotation water
from the oily water sewer system,
softened water from the potable water
treatment plant, a small stream from the
Rectisol unit, and small volumes of
distillate water from the Multiple Effect
Evaporators. The comenter also notes
that: (1) Stripped gas liquor comprises
over 70 percent of the make-up water in
the Cooling Tower; (2) the Cooling
Tower is operated with a blowdown
rate of approximately 350 to 500 gallons
per minute or 650.000 to 995,056 metric
tons per year, and (3) the Cooling Tower
blowdown is directed to the Multiple
Effect Evaporators.
The commenter argued that because
the stripped gas liquor is continuously
used, and is not discharged by the
facility, it cannot logically be regarded
as a "waste," The commenter added.
however, that if EPA does consider
stripped gas liquor to be a waste, then it
is the "process wastewater" generated
by the facility.
EPA has reviewed the information
provided in these comments and the
National Survey response provided by
the commenter and concluded that the
available information indicates that
stripped gas liquor is a solid waste that
does not appear to be eligible for the
closed-loop exemption because it
sometimes is stored in an impounded
prior to use. (See above discussion
regarding phosphoric acid process
wastewater and January 4,1985 notice
(50 FR 814.) However, EPA also
concludes that stripped gas liquor is the
principal aqueous waste generated by
the gasification process and thus is
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Federal Register / Vol. 35, No. 15 / Tuesday, January 23, 1990 / Rules and Regulations
2331
process wastewater and remains a
Bevill waste.
b. Volume. Two commenters urged
EPA to reconsider its proposed
determination that process wastewater
from coalgasiflcat:on.fails the high
volume criterion. They contended that
the data cited by EPA in the September
25.1989 Federal Register were not
accurate. Both cocunentars stated that
process wastewaters are actually
generated at a rate that far exceeds one
million metnc tons per year. One
cotnmenter claimed that rather than
being generated at a rate of 598,030
metric tons per year, this waste is
produced at a rate of approximately
5,000.000 metric tons per year. The
commenter believed that this error was
based on the Agency's
misunderstanding of the gasification
process and on its own response to the
mineral processing waste questionnaire,
The commenter identified the process
wastewater as "cooling water" because,
as discussed above, they do not
consider it a waste. The- commenter
submitted the following volume data:
1986—1,910,000 metric tons:
1987—5,020.000 metric tons:
1988—4.830,000 metric ton* ami
1989—5,050,000 metric tons.
The volume reported for 1989 is through
October and projected through the end
of the year.
EPA has carefully reviewed the
comments and survey information and
agrees that: (1) The facility
mischaraterized the point of generation
when it initially completed the 1969
National Survey, which EPA used in
developing the proposal; and (2) process
wastewater from coal gasification meets
the high volume criterion because it is
clearly generated in quantities above the
applicable criterion value of 1.000.000
mt/yr average per facility established by
the September 1 final rule.
c. Hazard, A. commenter supported
EPA's proposed determination that coal
gasification process wastewater meets
the low hazard criterion.
3. Furnace Off-Gas Solids From
Elemental Phosphorus Production
One commenter supported EPA's
decision to remove furnace off-gas
solids from elemental phosphorus.
production from the Bevill exclusion.
a. Processing Criterion/Waste
Definition. One commenter raised
several issues about the definition of
this waste stream. The commenter
supported EPA's proposed
determination that furnace off-fas solids
are "solids," even though one facility
generates the waste in the form of a
slurry. The commenter notes that
furnace off-gas solids from elemental
phosphorous production are generated
either as a solid waste stream or as a
slurry and contends that the term
"elemental phosphorus off-gas solids"
was specifically defined to include,
among other things, "prscipitatcr
slurry." EPA's assertion that the
commenter aggregated off-gas solids
with scrubber blowdown is, the
commenter claimed, incorrect, The
commenter also claimed that further
examination shows that the material
stream is more properly classified as
"phossy water" and that one result of
reclassification is that 1.5 million tons of
furnace off-gas solids should be
reclassified as "phossy water." Tha
commenter maintained that the
regulatory status of "phossy water" for
the September 1,1989 Final Rule was
based upon data that understated the
generation rate of this process stream by
approximately one-half. The commenter
further maintained that all furnace off-
gas solids waste streams need to be
similarly classified to prevent this
rulemaking from having inequitable
competitive effects between companies.
EFA agrees that the waste stream in
question should be denned uniformly
across all facilities that generate-it.
Because the waste stream is generated
(and managed) as a solid at the majority
of facilities where it is generated, EPA's
position is that the waste of interest is a
solid. As a result, at the two facilities at
which the off-gas solids are collected in
a liquid, the high volume and low hazard
criteria have been applied to the solids
entrained within these liquid wastes, as
determined by the settled solids
reported by the facilities in their
responses to the National Survey. The
liquid portions of the wastes, as
generated, clearly fail the applicable
high volume criterion (average annual
generation rate of more than one million
metric tons per year),
6. Volume, A commenter stated that
the waste stream encompassing furnace
off-gas solids from elemental
phosphorous production is generated as
a liquid at one facility. The commenter
concurred that the stream does not meet
the high volume criterion. Another
commenter argued that because of the
relatively low volume of the furnace off-
gas solids (4,885 mt/yr), the treatment of
these solids as hazardous wastes is
reasonable and practicable.
However, one commenter argued that
the volume determination must be made
using data from all facilities that
generate furnace off-gas solids. EPA's
proposed determination that the average
rate of generation per facility is 4,885
metric tons per year was, they
contended, based on incomplete
information because data from facilities
that submitted data as Confidential
Business Information were not included.
The commenter further contended that
when all five facilities' furnace off-gas
solids material streams are considered.
the per plant facility average for the
"furnace off-gas soiids" is 44.012 metric
tons per year, and that this average is
well within any statistical margin for
error and thus, furnace off-gas solids
should be deemed a "high volume"
waste.
As stated above, "furnace off-gas
solids" generated at two facilities that
reported using wet collection systems
are denned as the solids removed from.
the scrubber waters. Furnace off-gas
solids generated by three other facilities
are in fact solids as generated. Revised
(and final) waste generation
determinations have been prepared en
this basis and are presented in Section
III, below. These data show that furnace
off-gas solids is not a high volume
waste.
c. Hazard. Two commenters
addressed the hazard level of furnace
off-gas solids from elemental
phosphorus production. One commenter
stated that the analytical information it
provided in the 1989 National Survey
demonstrated that the waste stream is
not a hazardous waste under the RCRA
characteristic of corrosivity. The other
commenter contended that samples of
the slurry of furnace off-gas solids were
found to contain cadmium in
concentrations as great as 249 percent of
the regulatory level of 100 times the
MCL
Review of EPA's sampling data
indicated that this waste passes the low
hazard criterion, as discussed in Section
III below.
4. Process Wastewater From
Hydrofluoric Acid Production
a. Processing Criterion/Waste
Definition. Two commenters described
the hydrofluoric acid production
process. The hydrofluoric acid
production process extracts mineral
values by reaction of mineral rock with
suifuric acid, creates a calcium sulfate
co-product, fluorogypsum, which is
slurried to disposal, and circulates
process wastewater through a pond
system prior to reuse in the processing
facility. One commenter noted that
additional process wastewater is
generated by cleaning the hydrofluoric
acid gas.
One commenter argued that EPA's
determination to list separately
fluorogypsum and process wastewater
from hydrofluoric acid production is
impractical. The similarities between
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2332 Federal Register / Vol. 55. No. 15 / Tuesday, January. 23, 1990 / Rules and Regulations
the two waste streams are such that at
the Calvert City, Kentucky hydrofluoric
acid plant, the two are co-mingled at the
point of generation. The commenter
claimed that the proposed regulation
would impose different regulatory
requirements on two similar wastes
(because fluorogypsum would remain
excluded, but process waste water
would not), which from a practical
perspective, is unreasonable since the
requirements applicable to one will
affect the management of the other. EPA
should allow process wastewater from
hydrofluoric acid production to retain its
status under the Bevill exclusion, and
should not evaluate fluorogypsum and
process wastewater separately, because
the two streams are essentially
identical.
EPA disagrees. The two waste
streams are identiflably distinct (one is
a solid and the other a liquid) and are
generated by different parts of the
production process. The fact that they
are currently co-managed does not
imply that they should or must be co-
managed.
b. Volume, Two commenters
disagreed with EPA's proposed
determination that process wastewater
from hydrofluoric acid production failed
to meet the high volume criterion. One
commenter questioned the basis for
EPA's decision, given the lack of data.
The commenter argued that the waste
was not included in the 1989 National
Survey of Solid Wastes from Mineral
Processing Facilities. Therefore, in the
September 25,1989 NFRM, the average
rate of generation of process
wastewater from hydrofluoric acid was
listed as "n/a". Yet EPA determined that
this liquid waste stream was not
generated in quantities over 1,000,000
metric tons per year through
calculations or interpretations of survey
results, which were not provided In the
background documents. The second
commenter argued that EPA may have
overlooked or misunderstood the Survey
data. In fact, they stated, process
wastewater from hydrofluoric acid
production is generated at an average
rate per facility far in excess of 1 million
metric tons per year. The commenter
resubmitted its Survey, which includes a
process flow diagram of die hydrofluoric
acid process. Information is also
provided on the volume of process*
wastewater generated and managed in
sections 5 and ft of the Survey.
One commenter supported EPA's
application of the high volume criterion
to the reported process wastewater
inflows to surface impoundments. The
commenter maintained that the flow
rate to surface impoundments can be
used to estimate process wastewater
flow rates. According to the commenter,
data available through plant NFDES
records, the commenter claimed,
indicate that the flow rate does exceed
the 1,000,000 metric tons per year Bevill
criterion. Specifically, the most recent
water balance, submitted as part of the
NPDES renewal application, indicated
that the inflow to surface impoundments
from the hydrofluoric acid production
process was 2,079,400 gallons per day,
which is equivalent to 2,900,000 metric
tons per year, according to the
commenter.
The Agency has carefully reviewed
these comments and the revised survey
submitted by the commenter and agrees
that process wastewater from
hydrofluoric acid production satisfies
die high volume criterion, as discussed
below in section ID.
c. Hazard. Two commenters
addressed the hazard level of process
wastewater from hydrofluoric acid
production. One commenter agreed with
EPA's proposed determination that the
waste is low hazard. Another
commenter claimed, however, that
EPA's sampling data demonstrated that
process wastewater from hydrofluoric
acid production exhibits the hazardous
waste characteristic of corrosivity (pH
values of 1.4 and 1.86), and questioned
EPA's failure to remove the waste from
the Bevill exclusion. The commenter
also urged EPA to consider this data in
preparing its Report to Congress.
The Agency generally agrees with the
commenter that all relevant hazard data
should be considered in the study of the
waste stream when preparing the Report
to Congress. However, EPA finalized the
low hazard criterion in the September 1,
1989 rule and is not currently
entertaining comments on it The
Agency's rationale for the low hazard
criterion is outlined in 54 FR 36592.
EPA's sampling data indicate that this
waste does not exhibit a pH of less than
1, and therefore, complies with the low
hazard criterion.
5. Process Wastewater From Primary
Lead Processing
a. Processing Criterian/Wasta
Definition. One commenter claimed that
EPA must study all process wastewaters
from primary lead production.
contending that once EPA completes its
study, it will realize that these are not
wastes, because process wastewaters
from primary lead production are reused
within the primary lead production
circuit RCRA hazardous waste
requirements, therefore, are not
appropriate.
In response to this comment EPA
notes that the extent to which this waste
stream is managed through "closed
loop" recycling, and hence, is not
subject to RCRA requirements, would be
addressed in the Report to Congress, if
this material were found to meet the
Bevill special waste criteria. The waste
does not meet these criteria, however.
and thus will not be included in the
Report to Congress. Nevertheless, if the
waste is managed in such a way that it
does not meet the definition of a solid
waste, then RCRA hazardous waste
requirements would not apply.
One commenter urged EPA to clarify
its definition of process wastewater
from primary lead production so that all
waters that are collected from
processing operations are specifically
included in that definition. The
commenter states that the only reason
for EPA's including contact cooling
water in the definition of process
wastewater and not including acid plant
blowdown is the arbitrary elimination of
one relatively large volume process
water stream from the volume amount.
In addition, defining this waste as
"waters that are uniquely associated
with processing operations that have
accumulated contaminants to the point
that they must be removed from the
mineral production system" is confusing.
Do the waters need to be removed from
the system, or do the contaminants need
to be removed from the waters?
EPA responds that the reasons for
distinguishing between different
aqueous waste streams generated in the
mineral processing industry have been
discussed at length in previous
rulemaking notices (54 FR :5318, April
17,1989: and 54 FR 38592. September 1,
1989.) Briefly, EPA believes the
distinctions it has made are appropriate
based on the available information
concerning the waste characteristics
and points of generation in the process.
As explained in the preamble to the
September 1,1889 final rule, EPA has
considered acid plant blowdown and
other wastewaters from primary lead
processing to be two distinct wastes
because these wastes have substantially
different characteristics. EPA believes
that the definition of wastewater clearly
indicates that it is the wastewater that
needs to be removed from the system
because it is the wastewater and not the
contaminants to which the definition
refers.
b. Volume. One commenter stated that
the volume EPA used as a basis for
proposing to eliminate process
wastewater from primary lead
production was less than the actual
amount generated at its plants. The
commenter argued that this incorrect
determination was s result of artificial
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Federal Register / Vol. 55, No, 13 / Tuesday, January 23, 1990 / Rules and Regulations
limitations on ths actual amount of
water that could be reported as "process
wastewater" in the- National Survey of
Solid Wastes from Mineral Processing
Facilities, where EPA only solicited
information on processing units
associated with the generation of
process waters. According to the
commenter, EPA inappropriately
reduced the number of streams counted
toward the volume catoff by focusing on
only a few process water streams. The
commenter maintained that its internal
data indicate that the volumes of
process wastawater from primary lead
production generated by its plants
excsed the 1,000.000 metric ton
threshold. Another commenter was
dismayed by EPA's conclusion that
process wastewater from primary lead
procassing was low volume, because
there is no way to verify the numerical
data used to arrive at the average of
785.562 metric tons per year.
EPA responds that the- National
Survey requested data on the quantity of
wastewater generated by all mineral
processing operations at each facility
surveyed, and that ths responses
provided indicata that process
wastewater is not a large volume waste.
EPA is limited in the amount of
information it can present on the waste
generation calculations used to develop
the September 23 proposal because one
of the commenters has requested
Confidential Business Information status
for their information.
c. Hazard. Ons commenter objected to
EPA's on-site sampling methods. If. in
the survey, the Agency requests
information on process wastewaters,
other waste streams, such, as process
water from sintering, should not be
sampled for the hazard determination.
Because of the scheduling constraints
imposed by the Court of Appeals, EPA'a
waste sampling effort had to be
conducted before the final contours of
the benefication/processing boundary
had been established. Thus. EPA
sampled wastes that are, in hindsight,
outside the scope of the current
rulemaking. The analytical results for
wastes that are outside the scope of this
rulemaking (i.e., process water from
sintering) have not been used in
evaluating compliance, with the low
hazard criterion. Instead. EPA has used
results from samples of wastes that are
the subject of this rulemaking (i.e.. slag
granulation water] in determining that
(his is not a low hazard waste,
6. Sulfate Process Waste Acids From
Titanium Dioxide Production
a. Hazard One commenter stated that
sulfate process waste acids from its
facility meet EPA's low hazard criterion
and should therefore be retained in the
Bevill exclusion. The commenter
disputed the selenium concentrations
published In the proposed rule, stating
that if EPA asserts that the sample
exceeding the criterion comes from the
commenter's facility, then the Agency is
mistaken. The commenter notes that the
sulfate process waste acid sample was
essentially analysed three times: once
as is. once using the SPLP, and once for
EP toxicity. In the leaching procedures
(SPLP and EP Toxicity) the sample is
filtered and the filtrate analyzed. The
solids (if any) are leached and the
leachate is analyzed. Since there were
no solids, the three analyses should
have agreed. In actuality, the
concentration for selenium was below
the detectable limit for two of the
samples, while selenium showed up on
the SPLP sample at a level of 8.3 mg/1.
•The corsmenter retained a portion of the
sample that was collected for EPA and
had it analyzed for EP Toxicity.
Selenium concentrations were beiow
detectable limits. The commenter also
claimed to have made facility
improvements which have caused
sulfate process waste acids to become
less acidic. The overall average pH from
1984 through 1938 was 1.C2.
EPA agrees that the reported SPLP
selenium concentration that is
questioned by the commenter dees
appear to be anomalous, but believes
that the other data, including the pH
data, collected during EPA's sampling
visits are accurate and provide a
sufficient basis for applying the low
hazard criterion to this waste stream.
The average pH data provided by the
commenter are not relevant to this
rulemaking because average pH values
do not have meaning and are not
consistent with the data requirements
specified in the low hazard criterion for
the pH tsst,
7. Sulfate Process Waste Solids From
Titanium Dioxide Production
a. Volume. Two commenters urged
EPA to reconsider its preliminary
conclusion that sulfate prossaa waste
solids fail to meet the high voiujr.a
criterion. One commenter indicated that
sulfate process waste solids are
generated, in the form of a slurry, at a
rate of 86,300 short tons (73,723 metric
tons) per year as indicated in the
November 21.1988 comments and the
response to EPA's National Survey of
Solid Wastes from Mineral Processing.
Another industry commenter claimed
that EPA miscalculated the volume of
sulfate process waste solids generated
annually. The commenter stated that a
total of 49.900 metric tons are handled.
The values used for suspended solids
were from the commenter's quarto-ly
samples, which have been taken sir.Cd
1984. According to the commenter. these
volumes confirm those given, in
comments provided in rsspcr.se to the
October 10.1038 proposal of 85.0CG
tons/year, which included chlcriue
wastes. The commenter furthsr
indicated that these wastes, together
with the treatment residuals, w-.ll bring
the total solids handled to well ever
500.000 tons per year.
It is EPA's position that the waste of
interest is the dewatered waste solids
taken from the drum filter at one facility,
rather than the slurry frora the ciarifiar,
as suggested by the commenter, because
the available information indicates that
the primary purpose of the dewsterir.g
operation performed by the drum filter is
to return product solution to the
production process and, thus, it
resembles a processing operation more
closely than it does a waste treatment
operation. Accordingly, EPA has used
ths reported quantity of drum filter cake
rather than the quantity of slurry sent to
the drum filter in evaluating the
compliance of this waste stream with
the high volume criteria. After farther
analysis, the Agency has concluded that
the revised waste generation rates
reported by the second ccinmentsr are
reasonable, though the underlying data
are not readily apparent in the
commenter's response to the National
Survey. Revised (and nr.al) waste
generation estimates, which indicate
that this is not a high volume waste, are
presented in section ILL below,
D, Relationship of the Proposed Rule to
Subtitle CofRCRA
1. The Mixture Rule
a. General comments. In their
comments on the September 25
proposal, a number of commenters
objected to the Agency's interpretation
of the mixture rule in the September 1.
1989 final rule and questioned what the
impact of the mixture rule would be
upon the Bevill determinations
contained in the September 25 proposal.
Commenters requested that EPA
reconsider its interpretation of the
mixture rule as it applies to Bevill
excluded wastes that are mixed with
relatively small volumes of non-
excluded wastes. Commenters noted
that a mixture of a Bevill excluded
waste and a characteristically
hazardous waste would be considered a
non-excluded hazardous waste.
Particularly in the phosphate industry,
commenters objected to this
classification, arguing that if the non-
excluded waste in a mixture shares the
Reproduced from
bast availabls copy.
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2334 Federal Register / Vol. 55. No. 15 / Tuesday, January 23. 1990 / Rules and Regulations
same hazardous characteristic as the
Bevill excluded waste, the Bevill status
of the resulting mixture should not be
withdrawn,
Cammenters also requested that the
Agency clanfy the mixture rale in a
number of ways. First, they suggested
that EPA clarify whether mineral
processing wastes that are temporarily
excluded from RCRA Subtitle C
requirements may be used (e.g., as air
pollution control scrubber water] in
production units that do not generate
Bevill wastes, and similarly whether
non-Bevill excluded wastes may be used
in production units that generate Bevill
excluded wastes. In particular,
eoraraenters requested clarification of
the status of a Bevill-excluded waste
that is used in a non-Bevill production
unit when the waste exhibits a
characteristic or hazardous waste after
use in the non-Bevill operation only
because the Bevill waste that is an input
to the non-Bevill process exhibits the
hazardous characteristic.
In addition, commenters argued that
the October 28,1989 supplement to the
proposed regulations for burning of
hazardous waste in boilers and
industrial furnaces (54 FR 43718)
conflicts with the interpretation of the
mixture rule established in the
September 1,1989 final rule. The
proposed rale on burning states that
residues would remain within the Bevill
exclusion if the character of the residual
is determined by. the Bevill material. In
contrast the September 1 final rule
states that any material burned with a
low volume, non-Bevill waste would be
regarded as hazardous even if the
characteristic exhibited is the same as
the characteristic of the Bevill waste,
Commenters requested that the Agency
reconcile these conflicting
interpretations of the mixture rule by
adopting the approach in the proposed
rule on burning,
b. Comments related to phosphoric
acid production. Commenters from the
phosphoric acid industry requested that
the Agency provide a supplementary
explanation of its mixture rule position
as it relates to phosphoric acid process
wastewaters, and allow for public
comment The ammoniated phosphate
fertilizer (APF) process utilizes process
wastewater as an influent and then
returns it to the originating phosphate
complex pond. One commenter
contended that APF process wastewater
does not exhibit hazardous
characteristics when generated
separately from a facility that produces
phosphoric acid. Therefore, the
ommenter argued APF wastewater
must not contribute the hazardous
characteristic found in phosphoric acid
process wastewater, and thus it should
not trigger the removal of phosphoric
acid process wastewater from the Bevill
exclusion. Phosphate industry
commenters urged the Agency to reject
any interpretation of the mixture rule
that would remove phosphate complex
pond water from the Bevill exemption
because it contained process
wastewater used in the APF process.
Commenters urged the Agency to
adopt an interpretation of the mixture
rule consistent with the position
advocated in the October 28,1989
proposal (54 FR 43718) on burning, and
allow small amounts of sulfuric acid
process wastewater to be combined in
the general process wastewater system
without the removal of the entire system
from the Bevill exclusion. Phosphate
industry commenters objected to the
mixture rule interpretation contained in
the September 1.1989 final rule in which
the addition of sulfuric acid process
wastewater to a phosphoric acid
complex's water recirculation system
would result in the entire system being
removed from the Bevill exclusion.
According to one commenter, although
sulfuric acid process wastewater
displays the same characteristic of
corroaivity as phosphoric acid process
wastewater, the addition of sulfuric acid
process wastewater may constitute less
than one percent of the daily
wastewater generated at an average
facility, and thus should not affect the
Bevill status of the entire waste stream.
c. Comments related to hydrofluoric
acid production. One commenter
requested clarification on the use of
hydrofluoric acid process wastewater in
an aluminum fluoride plant and asked
the Agency to address the use of Bevill
excluded characteristic wastes as a
source of influent to other processes.
The commenter argued that hazardous
characteristics displayed by water
existing the aluminum fluoride facility
art solely from hydrofluoric acid (HF)
process wastewater. Thus, the
commenter asserted, the Agency*!
interpretation of the mixture rule should
have no bearing on whether HF process
wastewater remains within the Bevill
exclusion. The commenter requested
that if the Agency interprets the mixture
rule such that the use of process
wastewater in the aluminum fluoride
plant results in all water in the pond
where that water is finally disposed
being removed from the Bevill exclusion,
EPA should supplement the proposed
rule with its rationale for such a
decision, and allow for additional public
comment
cf. Comments related to coal
gasification. One commenter objected to
the Agency's possible determination,
based upon the mixture rule, that
process wastewater from coal
gasification is hazardous. The
commenter asserted that if process
wastewater was disposed of
immediately rather than used in a
cooling tower, the waste stream would
not demonstrate hazardous
characteristics; however, important
water conservation and disposal
practices could not then be practiced.
Thus, the commenter concluded, the
Agency should not withdraw the Bevill
exclusion for coal gasification process
wastewaters based upon hazardous
characteristics when those
characteristics result from appropriate
water conservation and disposal
practices.
e. Response to comments. In response
to these questions and issues raised by
commenters regarding the mixture rule,
EPA makes the following observations.
First like the criteria established for
identifying wastes eligible for the Bevill
exemption, the Agency's position on the
mixture rule was finalized on September
1,1989 and is not open for comment as
part of this rulemaking. Second, the
Agency plans to add comments to the
docket for the October 28th notice
regarding the alleged contradiction
between the October 28,1989 (54 FR
43718) supplement to the proposed
regulations for burning of hazardous
waste in boilers and industrial furnaces
and the mixture rule in the September l.
1989 final rule. Third, wastes from
operations that are not mineral
processing operations based on the
definition of mineral processing
contained in the September 1 final rule
are not mineral processing wastes
regardless of the nature of any inputs
(including Bevill wastes) to that process.
Finally, the mixture rule is not a factor
in today's decision to retain the Bevill
exemption for process wastewater
because Bevill wastes arc being
evaluated, not mixtures.
2. Land Disposal Restrictions
Two commenters expressed concern
about the impact of Land Disposal
Restrictions (LDRs) on wastes newly
removed from the Bevill exclusion. One
commenter stated that the Agency
cannot accurately estimate the
economic impact of the proposed rule
until the "Third Third" rule is
promulgated.
The second commenter requested that
the Agency consider mineral processing
wastes removed from the Bevill
exclusion, "newly identified" wastes
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Federal Register / Vol. 55, No. 15 / Tuesday. January 23, 1990 / Rules and Regulations £
under lho LDRs. Since "chloride-
ilmenite" wastes from titanium
production were not considered RCRA
hazardous wastes on November 9, 19B4.
the date of HSWA enactment, (he
commenter asserted that they must be
considered newly identified wastes. The
cnmmenter argued that without terming
these wastes newly identified, the
facility would unfairly have to meet tlie
hummer date of August 8,1990 for
California List wastes, Facilities ih.it
generated a waste stiltjpt-f ici Cniifoniiii
List restrictions on underground
injection were granted a two yenr
national capacity vwrinnce during which
they could either plan new capacity or
submit n "no-migrph'on" petition. The
commnntRr maintained that equal
opportunity muit be granted to mineral
processing facilities to develop new
capacity or submit no-migration
petitions.
In addition, the comments usiu-il [hat
the Agency delay the applicability of the
l.DRs to chloride-ilmetnte wantcs by
detennining that such wastes are
beneficial wastes and subject to further
study by EPA. This would allow !b/s
Agency, according to the eoinmimter.
additional time to evaluate Ihe
protectiveness of underground injnulion
far chloride-ilmenile wastes.
EPA responds that, ns explained hi
the September 1,1WW final rule and In
the proposed land dtsposnl restncti'jn.i
(IDRs) for the third third srheduls
wastes (54 FR 48372, 40.170; November
22,1089), the Agency believes the
wastes that are brought under Subtitte C
regulation by today's final rule to be
"newly identified" wastes for purposes
of establishing LDR standards under
section 3004(g)(4) of RCRA. {54 FR
36624J. Accordingly, EPA has proposed
that newly identified mineral processing
wastes not be subject to the BOAT
standards that the Agency proposed on
November 22,1909 (M FR 48372) fnr
characteristic hazardous wastes. As
required by RCRA section 3
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2338 Federal Register / Vol. 55. No. 15 / Tuesday, January 23. 1990 f Rules and Rcgulationa
Nonetheless, EPA has, In both the
September 25 proposed and today's final
rule, estimated the costs associated with
stabilizing residues from liquid waste
treatment so as to make them
amendable to land disposal. Therefore,
while it is not possible, at present, to
dnfine BDAT (and thus. LDR impact)
lor any wastes removed from the Bevill
exclusion, EPA has attempted to capture
some of the likely costs associated with
future waste disposal activities.
Prospective corrective action costs are
by nature site-specific and difficult to
estimate. Currently availnb't:
information does not allow EPA to
estimate these costs with confidence. To
the extent, therefore, that any additional
facilities are brought into the subtitle C
on-sits waste management system by
this rule, EPA may have underestimated
cost and economic impacts. The reader
la referred to section VII below fur
additional discussion of the specific
features of the methodology employed.
A commenter also indicated that the
Agency also should recognize that
commodity producers cannot pass
compliance costs on to product
consumers;
EPA responds that, in the Economic
Impact Analysis provided in the
September 25 NFRM, the Agency
considered, on a commodity specific
basis, the extent to which potential
compliance costs could be passed
through to consumers. As indicated in
this analysis (and restated in Section
VII. below) EPA believes thnt the
commenter's suggestion that all mineral
processors in ail commodity sectors are
"price takers," having no ability to pasa
through cost incre«fws and therefore
having to absorb them internally, is
demunstrably untrue.
One commenter maintained that in
order to accurately estimate the
economic and regulatory Impacts of the
proposed rule, EPA must first resolve
the issues of the "mixture rule,"
rctroactivity and regenerated wastes. In
particular, one commenter charged that
EPA has not considered, as required by
Executive Ordor 12291, the economic
impact of excluding chromium
contaminated fill from Bevill status.
Also, to truly identify the economic and
regulatory impacts of the proposed rule,
the Agency should obtain Information
from all Inactive facilities.
EPA responds '.hat these issues were
addressed in the September 1,1988 final
rule and' are not relevant to this
rulemaking. To briefly restate the
positions outlined in that final rule.
however, EPA maintains that Subtitle C
regulations will not be imposed
retroactively. However, •etiv«
management of an historical
accumulation of waste will subject a
facility to Subtitle C regulations if the
material exhibits one or more
characteristics of a hazardous waste.
3. Compliance Cost, Market, and
Economic Impact Estimates
a. Treated residue from roasting/
leaching of chrome am. According to
one commenter, if the Agency imposes
subtitle C requirements for chrome ore
processing waste used as fill, on-site
treatment of the fill will become
burdensome and expensive. Also, if
future excavated fill must be managed
as a hazardous waste, depending on the
amounts of hazardous waste involved, a
severe economic burden may result
without any commensurate gain in
health or environmental benefits. In
addition, loss of Bevill status for the
chromium-contaminated fill nt a City of
Baltimore wastewatnr treatment plant in
Patapsco, Maryland, may prematurely
interrupt the process of developing
treatment alternatives.
The Agency does not view this issue
as relevant to the status of the 20 waste
streams addressed in today's rule
because it is not clear that the fill
material is one of the mineral processing
wastes covered by today's rule.
Commenters contended that the cost
of compliance with RCRA subtitle C for
inactive facilities should be addressed
by EPA. A commenter maintained that
the docket should include information
on existing inactive waste sites as well
as the number of chrome ore "fill" sites
that will be affected by the proposed
rule,
EPA responds that inactive facilities
were not sampled because they are not
pertinent to this rulem.iking.
Several commenters disagreed with
the compliance cost estimate for residue
from roasting/leaching of chrome ore.
One commenter argued that the waste
should be retained in the Bevill
exemption because of the significant
costs that corrective action requirements
could impose. According to the
commenter. disposal and treatment
costs will be at least an additional $2
million over the Agency's estimate of
compliance costs. Another commenter,
however, claimed that because its waste
stream is treated on-site under the
facility's NPDES permit and the treated
•waste is non-hazardous, there is no need
for its facility to modify in any way
current treatment or disposal practices',
end thus there is no cost for compliance
if the waste stream is removed from the: .
Bevill exclusion.
One commenter contended that the
impact of the removal of residue from
roasting/leaching of chrome ore from
the Bevill exclusion was incorrectly
estimated because EPA did not fully
evaluate all of the information provided
in the National Survey of Mineral
Processors'. In addition, not all of the
samples taken from the facility by EPA
were analyzed.
EPA responds that it used available
Method 1312 data to evaluate
compliance with the low hazard
criterion. Because of time constraints,
the Agency annlyzed the samples
collected on an "as generated" basis
prior to analyzing those collected on an
"as managed" basis; the former are
directly pertinent to and necessary for
the Bevill rulesnakfng process while the
latter are primarily of use in preparing
the Report to Congress. Since
publication of the September 25
proposal, however, the Agency has had
an opportunity to analyze additional
samples. Based upon these new
analyses and analyses performed in
support of the September 25 proposal,
the Agency agrees that the treated
residue from roasting/leaching of
chrome ore does not exhibit hazardous
characteristics and hence, would not be
subject to new regulatory requirements
and associated costs if removed from
the Bevill exclusion. The treated waste
is, however, being retained under the
Bevill exemption because it is both low
hazard and high volume.
b. Process wastewater from coal
gasification, EPA received several
comments arguing that removing
process wastewnter from conl
gasification from the Bevill exemption
would impose severe economic impacts
and would not in any way enhance the
environment. The commenters
maintained that the additional $1 million
in annual compliance costs
(commenter's estimate) are
unreasonable and would accomplish
nothing except for increasing
compliance costs, in light of the reuse of
the fluids in the same industrial process,
EPA should not, they stated, impose
economic burdens upon the industry.
Also, one commenter asserted that
North Dakota will lose substantial
amounts of tax revenues and
employment opportunities if RCRA
subtitle C regulation makes it
economically infeasible to continue
operating the Great Plains facility.
Commenters representing the electric
utility industry claimed that additional
regulatory controls under RCRA over
wastewater discharges from coal
gasification are unnecessary and
burdensome to the electric utility
industry because tha wastewater
discharges are subject to NPDES permits
under the Clean Water Act,
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Federal Regjgfer / Vol. 55, No, 15 / Tuesday, January 23, 1890 / Rules and Regulations 23,17
As discussed in section Of, below,
based upon further dnta in the form of a
revised survey response provided by ths
facility in question, EPA now concludes
that the waste stream does satisfy the
high volume criterion and so will be
retained for furlhfjr study. Discussion of
the prospective economic imparts of
removing the wssta from Ihe Revill
exclusion as part of this rulemnking is,
therefore, moot.
c. Furnace off-$as solids from
elemental phosphorus arudtsctiim. One
coinmenter agreed thai due to the low
cost of compliance wilh subtitle C
regulations, iroalrneut of furnace off g:is
solids from elemental phosphors
production as hazardous wastes is
reasonable »nd practicable. One
elemental phosphorus industry
cotnmentfir assorted that this con)p:;ny's
waste stream is not hazardous, and
therefore, no compliance costs w>!i be
incurred, EPA was unable to confirm
this for the particular facility In
question, and the eopimenter- supplied
data WB8 insuffidnnt to confirm that the
facility's waste will not exhibit a
hazardous characteristic. Thi Agonry
has, accordingly, maintained ifs
cons>rviitive approach lo estimating
potential cost and economic impacts
associated with this rtt'p by a£stirftip!>
that the waste is hazardous ond Ih.if the
facilily wi'l be affcrfed by the rule n\tn
though this may not turn out to be !hn
case.
d. Process irfisiPirctprfrom
hydrofluoric acirtprcithn:ti(tn. On<»
commontcr r^pojifd that bewu?! ofth«
co-mingling of iluorogypsum nr>d
process waslewater al the Calvpit City,
Kentucky plant, the annuiil pslim^'ed
flowr would be 2,300,000 metric tons per
ycnr, and not 103,328 metric tons pnr
year aa assumed in the Technical
Background Document "Development of
the Cost and Economic Impacts of
Implementing the Bevill Mineral
Processing Waste Criteria." Because
those volumes differ by an ordwr of
magnitude, the affect on EPA'i
estimation of compliance costs for
hydrofluoric acid waste streams subject
to subtitle C at a Calvert City plan!
would be significant. As discussed
below In section III, based upon further
data In the form of a revised survey
provided by one of Ihe facilities in
question and detailed written comments
from the other, it app-wrs that the waste
stream meets the high volume criterion
and the compliance costs thai
commenter claimed would be significant
will In fact not be incurred.
e. Sulfate process waste solids frost
titanium dioxide production. Onn
commenter questioned EPA'» conclusion
thut the proposed rule would have no
economic impact on the commcnter'a
facility. The commenter understands
that under EPA's policy, non-excluded
wastes which are disposed prior to the
effective data of the rule which would
mnke them subject to Subtitle C
requirements would not be subject to
diier;t Subtitle C controls surh ep
closure and post-closure cera
requirements. In the commenter's case,
solid wastes from the sulfate and
chloride processes were accumulated in
surface impoundments until October of
10-38. Since that time, however, only
non-hazardous wastes have b^n added.
The commcn'er assumes th;il consistent
with EPA's policy, these impeundwnlg
will not be subject to closure and post-
closure requirements.
EPA responds that the commenter is
correct in his assumption as long as the
wastes previously placed In the surface
impoundments are not actively managed
after the effective data of today's rule.
As discussed In the September 1,1989
final rule, EPA will not be applying
Subtiile C requirement retroactively.
For further discussion of this issue fee
54 FR 36592.
/. Wastes from phosphoric cad
protection. Commcnters from the
phosphalerack processing industry
contended that the industry could not
competitively withstand the costs of
complying with Subtitle C or the LUR
requirements. They contended thnt it is
infeasible, if not impossible, to manage
process w astewasler from phosphoric
acid production in compliance with
subtitle C requirements, especiiilry in
view of the upcoming land disp-js.il
restrictions on characteristic wastes. II
is essential that the Agency retain
process wastcwater from pj.osphojsc
acid in the Bevill Amendment exclusion.
As discussed below, EPA believes
that process wastewa'er from
phosphoric acid production compiles
with the high volume and low hazard
criteria and therefors the waste steam Is
today retained within the Bevill
exclusion. The need for and technical
and economic feasibility of subjecting
this material to Subtitle C requirements
will be addressed in the Repoil to
Congress.
F. nsquestsfor Clarifications/Technical
Corrections on the September 1,1P89
Final Rule
One commenter brought to the
Agency's attention a difference between
the preamble and rule language in the
September t, 1989 flnal nilemaking. In
the preamble to the final rule, the
Agency states that "roasting and
autoclaving art considered oeneflciation
operations if they are used to remove
sulfur and/or other impurities in
preparing an ore or miners], or
beneficiatod ore or mineral, for
luaching," (54 FR 30818) In addition, t.ha
commenter indicated that the Agency
slates that
chlorination is iomeiimes used prior to go!J
leaching operations in a procedure
functionally identical to roasting and
nuiQclsving (I.e., to chans» a sulfiile w? lo a
chemical form more ••".nwisble to leachirg).
EPA recognizes Owl ibis type of pre'i'o»im'>nt
operation muy he an integral part of leaching
operations, and accordingly, conwdsn non-
destructive chioHMtion of ores, min<*ra's. or
hpnef?r,iatfld ores or minerals «vh>m MSP<»
renal ing (un»i/or aiitodavmg and/or
chlothiation)/leachtag * * *"
C. Concerns With Administrative
Procedures
Commentcra on the proposed rule
made • number of requests to the •
Agency regarding the procedures EPA
has followed for administering the j
mineral processing rulemakings. One '
commenter requested that EPA defer j
final action on the proposed rule !
pending: (1) Judicial review of the
September 1,1889 final rule; (2)
clarification of the applicability of the ;
rales to inactive processing facilities;
and (3) a review of the mixture re!e.
Another commenter requested that the
Agency publish its rationale and allow
for public comment if EPA decides that
process wastewater from the production
of animal feed, ammonia ted phosphate
fertilizer, and phosphate complex ponds
«re not within th« icopa of the Bevill
exclusion. The same commcnier asked
Reproduced Iran
best availablB copy.
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2330
Federal Register / Vol. 55. No. 15 / Tuesday, January 23, 1990 / Rules and Regulations
that all documents used for previous
nilemakings be included in the current
docket (MW2P). One commenter asked
EPA to assess the analytical results of
the hazard sampling data and carefully
compare them with the eommenter's
own split samples. Finally, one
commenter sought additional time for
public review and comment on the
background documents for the high
volume criterion. The Rommentcr
clnimed that the documents were not
available for comment before the
September 25th proposed rule, yet
support the criterion made final in the
September 1st rule.
Because of court- imposed deadlines,
the Agency is compelled to promulgate
today's final rule on an accelerated
schedule {signature by January 15,1990).
In order to ensure that all information
compiled for previous rulemukings is
fully available to (ht public. Ihe Agency
has Incorporated by reference previous
mineral processing waste dockets*
except for the final rule reliating six
smelter wastes (53 FR 35412, September
13,1988), into the current docknl. EPA
believes that the public has been
provided an adequate opportunity to
comment on this rulemaking and,
therefore, an additionnl comment period
is not required. In addilion, EPA
believes clarification of the applicability
of the rules to inactive facilities and
review of the mixture rale are not
required or appropriate in the context of
this rulemaking because EPA's position
on these isouas was established in the
September 1,1989 fin^l rule.
III. Revised Application of the Final
Criteria for Defining Bnvill Mineral
Processing Waste*
Thii section of Ihe preamble presents
clarifications to the waste stream
definitions used in the proposal, revised
waste volume data and additional
discussion of selrcted da'a used in
evaluating compliance with the low
hazard criterion. Only those waste
streams for which noteworthy chnr«ges
have been made fo Ihe proposal nra
discussed in detail. A summary of the
Bevill status of the 20 mineral
processing wasted is also presented.
A. Clarification of Waste Stream
Definitions
Based on careful review of public
comments, and additional analysts of
previous EPA studies and company
responses to the 1989 National Survey of
Solid Wastes from Mineral Processing
Facilities, the Agency has made the
following decisions concerning the
definition of candidate Devill waste
streams, related process descriptions.
and the numbers of facilitiea generating'
each waste.
1. Treated Residue From Roasting/
Leaching of Chrome Ore
The residue from roasting/leaching of
chrome ore of concern in this rule is the
settled residue following treatment of
the slurried leaching waste. Both
facilities that reported generating
residue from roasting/leaching of
chrome ore pump their untreated waste
directly to an ensile treatment unit In
contrast to Ihe September 25 NPRM, this
final rule temporarily retains the
exclusion from hazardous waste
regulations for only those treated solids
which are entrained in the slurry as it
leaves the treatment facility and which
settle out in disposal impoundments.
Available data indicate that this mineral
processing waste is both low hazard and
high volume. As indicated in the
proposal, the untreated waste is not low
hazard.
2. Process Wastewnter From Coal
Gasification
The definition of process wastnwater
from the coal gasification operation has
been revised to clarify that process
wastewator from coal gasification is the
"stripped gas liquor" generated during
the gasification of the coal. This process
wastewater may be run through several
subsequent storage, treatment, and
reuse operations. This stripped gas
liquor was originally not nominated by
the facility because of a
misunderstanding about its status AS a
solid waste. In comments provided on
the September 25 proposal, however, the
company has requested that the entire
stripped gas liquor stream be considered
"process wa?tewater" rather than just
the portion reported previously. EPA
believes that the stripped gas liquor Is a
solid waste at the one facility that
generates the waste, and has evaluated
the extent to which the material
complies with the final Bevill criteria
accordingly. Because the facility's
response to the 1909 National Survey
indicates that the process stream, in
part, is stored in surface impoundments,
EPA does not consider its management
system to be closed-loop recycling,
meaning that for present purposes, the
Agency believes this material is not
eligible for the closed-loop exemption.
However, this does not affect the Bevill
status of the waste.
3. Slag Tailings From Primary Copper
Processing"
EPA has identified, as « result of
public comments, an additional facility
that processes slag from primary coppet
processing and thereby generates slag.
tailings. This Increases the number of
facilities known by EPA to generate slag
tailings to three.
4; Furnace Off-Gas Solids From
Elemental Phosphorus Production
This waste stream will continue to be
defined, depending on the facility in
question, as either the solid or semi-
solid material generated from the
phosphorus furnaces or BS the entrained
solids contained within scrubber waters
generated from cleaning furnace off-
gases. In no instance is the scrubber
water itself considered to be the
candidate Bevill waste because it is not
a high volume waste.
5. Process Wastewater Ftom Phosphoric
Acid Production
This wasle stream, for purposes of
determining Bevill status, includes the
following process streams resulting from
phosphoric acid plant operations: water
from phosphoric acid production
operations through concentration to
merchant grade acid; phosphogypsum
transport water; phosphogypsum stack
runoff: process wastewater generated
from the uranium recovery step of
phosphoric acid production; process
wastewater from animal feed production
operations that qualify as mineral
processing operations based on the
definition of mineral processing that the
Agency finalized on September 1: and
process wastewater from
superphosphate production. As
proposed on September 25, phosphoric
acid process waslewater is high volume
and low hazard waste and is, therefore.
retained in the exemption, although the
data used to arrive at this conclusion
have been modified in response to
public comments.
8. Chloride Process Waste Solids From
Titanium Tetrachloride Production
The "chloride-ilmeuite" process
reportedly employed by three titanium
tctrachloride production facilities, for
purposes of this rule, continues to be
considered a processing operation. Th«
primary reason for this determination it
the understanding that during this "two-
stage" process, the operation destroys
the identity of the mineral, produces
titanium tetrachloride gns (a mineral
product), and gewjutes wastes which
are functionally Identical to the wastes
generated by the chloride process at the
other six titanium tetrachloride
facilities. The fact that the ore being
utilized Is of a different type and grade
is not Justification for classifying the
operation as beneficiation. In addition,
by the company's own admission,
wastes from each part of the "two-step
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Federal Register / Vol. 55, No. 15 / Tuesday, January 23, 1990 / Rules and Regulation?
2339
bar.eficiation-dilorination" process are
not separable. Accordingly, the wastes
generated by this chlorination process
are subject to EPA's reinterpretation of
the Mining Waste Exclusion that was
finalized on September 1 and this
rulemaking. Assessments of volume and
hazard performed both for the
September 1 final rale and the
September 25 proposal included
"chioride-ilmenite" facilities as well as
other chloride process facilities. These
previous assessments, as well as
updates made in support of this final
rule, indicate that chloride process
waste solids from titanium tetrachioride
production are high volume and low
hazard and. therefore, ars retained in.
the exemption. Other wastes generated
by the chloride process (i.e., wastes
other than the chloride waste solid's}
were classified as non-Bevill mineral
processing wastes by the September 1
rule.
B. Compliance with the High Valaste
Criterion
Revised waste generation rate
estimates for the 20 conditionally
retained wastes are presented in Table
1. Many of these estimates have been
revised since publication of the
September 25 proposal, primarily
because of threa factors. First, revised
definitions or clarifications o£what
constitutes the individual waste streams
have led the Agency to in some cases
include, remove, or otherwise revise
data related to volume estimates for
particular waste streams.
Second, EPA has revised estimates Ins
a limited number of cases in direct
response to new data or other
information [e.g., clarification, ol surrey
responses) contained in public
comments on the proposal
Finally, EPA has, for this filal rule.
revised one average annual per-facility
waste volume presented in TaJble 1, not
because of new information, but
because the Agency has included
confidential business Information (CBI)
in the calculation, after determining that
ihe data could be aggregated and used
without disclosing proprietary
information. The Agency notes that this
estimate is essentially the same as that
used to make the high volume
determination for the proposed rule; the
average annual per-facility waste
volume presented ia Table 1 of the
proposal did not however, include data
from the CBI facilities. In cases where
proprietary information would be
revealed by presenting in Table 1 the
actual average based on CBI data, the-
Agency has either completely withheld
the data from the table (Le.. where the
only two/ facilities in the sector both
requested confidentiality, e.g., chrome
ore and titanium dioxide sulfate
process), has presented the solenon-CB!
facility volume [i.e., where only one of
several facilities is non-CBI, e.g., copper
calcium sulfate sludge and lead process
wastewater) or has published an
average based on the non-CBI data [i.e.,
where only ona of several facilities in
CBI. e.g., steel wastss).
The Agency wishes to reitsrate that
the fundamental source of data for
evaluating compliance with the high,
volume criterion has been, and
continues to be. the 1989 National
Survey, In order to account for market
fluctuations, EPA allowed facilities to
submit information in public comment
on the September 25 proposal
explaining, as necessary, that the
reported generation rates for 1988 did
not accurately reflect typical waste
generation rates at the facility. In
response, a small number of facilities
chose to revise their survey responses,
as noted above, but none claimed that
relying upon 1988 data per se would
produce an inaccurate result.
Accordingly, EPA has, for this final rule,
relied exclusively, with one exception
described below, on its own in-depth
analysis of written responses to the
National Survey to evaluate waste-by-
waste compliance with the high volume
criterion.
1, Trsatad Residue From Roasting/
Leaching of Chrome Ore
With the clarification that the waste
in question is the treated residue and
not the waste as it leaves the leach
operation, EPA has reviewed the CBI
data reported for the treated waste and
confirmed that the waste stream as
defined is, indeed, a high volume waste
solid. Both facilities generate the non-
liquid Bevill waste at rates in excess of
45,00 mt per year.
2. Process Wastewater From Coal
Gasification
With the determination that process
wastewater from coal gasification is
•tripped gas liquor, EPA has reviewed
the quantities of the total process water
generated at the facility and confirmed
that the waste stream as redefined is,
indsed, a high volume liquid waste.
3. Calcium Sulfate Wastewater
Treatment Plant Sludge From.Primary
Copper Processing
The Agency has reviewed its analysis
of the volume data provided foi this
waste stream in the National Survey.
EPA has determined that the waste
volume presented in the proposed rule
for the non-CBI facility is not
representative of the calcium sulfate
sludge, but of the sludge and the
combinsd transport liquid. The waste
volume used to evaluate the status of
the wasta, therefore, has been revised to
reflect the quantity of actual slucgs
generated. Thase revised numbers are
consistent with ft) the estimates made
for previous proposed and final rules
regarding the reinterprstation cf the
Bevill exclusion and (2) volume
estimates presented in the facility's
comments regarding those proposals.
EPA notes, that a review of the data from
the CBI facility leaves some doubt as lo
the point in the process at which the
residual waste stream is the Bevill
waste, and therefore which waste
volume should be used. The Agency,
however, has confirmed that evea a
conservative calculation using the
smallest volume reported still yields an
average which exceeds the 45,000 metric
ton threshold for the high volume
criterion. EPA concludes, therefore, that
the waste stream meets the high volume
criterion.
4. Slag Tailings From Primary Copper
Processing
With the addition of the third facility
to the group of facilities genera ting this
waste, the Agency reviewed the
available survey data and revised the
industry average generation rate for slag
tailings to take into account for all three
facilities that generate the waste. After
revision of the quantity estimates, the
waste stream continues to pass the high
volume criterion.
5. Furnace Off-Gas Solids From
Elemental Phosphorus Production
Confidential Business Information for
three elemental phosphorus facilities
was included in the recalculation of the
average waste volume presented in
Table 1 of today's rule, and this value
was used to evaluate compliance with
the high volume criterion. These CBI
data were also used to evaluate
compliance with the high volume
criterion for the September 25 proposal.
but were not presented in the NPRM in
an effort which upon closer
examination proves unnecessary, to
protect the confidentiality of the data.
The average waate volume in Table 1
represents- the actual solids generated
from cleaning the furnace off-gas: in
some cases, these solids may have beea
entrained in scrubber wattr.* For EPA's
calculations, however, the. quantities of
solids contained in these scrubber
waters as reported in the surveys [either
as percent solids in (he scrubber water
•tlw miliblt data indicat* (Jut th* icrubber
witw i» not * hi jh Tohnn* wut*.
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2340
Federal Register / Vol. 55, No. 15 f Tuesday, January 23, 1990 / Rules and Regulations
or quantity of sludge generated from
scrubber water settling] were the
volumes ascribed to those facilities for
purposes of developing the sector-wide
annual waste generation rate. The
average per-facility volume of this waste
continues to be below the high volume
criterion.
6. Process Wastewater From
Hydrofluoric Acid Production
The Agency proposed to withdraw
this waste stream aa a low volume
waste due to the failure of the facilities
to provide waste generation data in the
comments in which the waste streams
were originally nominated or in their
responses to the National Survey. Both
facilities reportedly producing Bevill
waste from hydrofluoric acid production
have subsequently presented the
Agency with volume data in comments
and [in one case) a revised facility
survey. The Agency has reviewed these
industry comments and the additional
survey data and has concluded that
process wastewater from hydrofluoric
acid production satisfies the high
volume criterion for liquids. As the
waste stream has been determined to be
low-hazard, the process wastewater is
retained in the Bevill exclusion.
7. Process Wastewater from Primary
Lead Production
The Agency has reevaluated its -
methodology for volume estimation of
this waste stream, and has subsequently
removed from the analysis one facility
which was not operated on a consistent
basis (37 days in 1988). The Agency's
analysis indicates, however, that
although removal of this facility from
the analysis increases the average
annual per-facility waste volume, the
process wastewater is not generated on
a sector-wide basis in quantities
sufficient to meet the high volume
criterion. The waste stream, therefore,
has been withdrawn from the Bevill
exclusion. The value reported in Table 1
is the volume of process wastewater
from the remaining aon-CBI facility; this
is not the actual sector facility average
used to make the high volume
determination.
8. Air pollution control dust/sludge from
lightweight aggregate production
EPA has revised its estimate of the
volume of this waste stream based on
additional analysis of information
included in the surveys submitted by the
majority of the lightweight aggregate
facilities. Waste management data
submitted in the survey were analyzed
to determine raora accurately the actual
generation of solids, in lieu of basing the
estimates on solids entrained in
wastewaters. These revised estimates,
confirmed by data submitted by
commenters addressing the earlier
proposed reinterpretations, were used to
calculate a new sector average for the
waste stream. The Agency
acknowledges that the facilities that use
air pollution controls other than wet
scrubbers, a minority in the sector, have
not been represented in the analysis
because data are not available on the
quantities of APC dust that these
facilities may generate. Data collected in
the National Survey for the iron and
steel indusiry, however, indicates that
APC dust resulting from dry collection
methods is typically of lower volume
than sludges generated from wet
scrubbers. As a result EPA believes that
inclusion of APC dust volume data in
the analysis would not increase the
facility average, much less double the
average as would be needed to meet the
high volume criterion. Based on EPA's
revised estimate, air pollution control
dust/sludge from lightweight aggregate
production does not pass the high
volume criterion and ia hereby
withdrawn from the Bevill exclusion.
9. Sulfate Process Waste Solids from
Titanium Dioxide Production
Waste solids from the production of
titanium dioxide using the sulfate
process are removed from the
processing operations and managed in
multiple ways at the two facilities that
employ the sulfate process. In its
original response to the 1989 National
Survey, one facility reported an
aggregated volume of waste solids from
chloride and sulfate processing
operations. Because EPA was unable to
disaggregate the volume of wastes from
chloride v. suifate processing operations
at this facility, EPA used data provided
by the other sulfate process facility as
the basis for the average annual per
facility waste generation rate in the
proposal. In comments on the proposed
rule, the facility that had previously
reported aggregated volume data
provided separate volume data for
ehcride and sulfate process waste
solids. As a result, for today's proposal.
EPA has developed a revised per-facility
average annual waste generation rate
that is based on data from both
facilities. However, as in the proposal,
the waste is not high volume. The waste
stream, therefore, has been withdrawn
from the Bevill exclusion.
TABLE 1.—RESULTS OF APPLYING THI HIGH VOLUME CRITERION TO TWENTY CONDITIONALLY RETAINED PROCESSING ,VASTES*
ComnxxJHy MCtor
Conditionally retained watt*
Solid or Hquid
faowy
gtngration
jmt/yn
Notes
NO, at
faotitaj
reportng
Passes high
volume
cntsnon
Coal gas
Iron._
Sodium ctvomata/Uctt
SIM)..
ProcM* wtstM«Mr.
Calcium suKata wastawaiar traatnwnt plant
Kudo*.
Sag tailing
Air poWutxxi eoWrol duat/«udga_.
Blast fumaoa ilag
Procata *a»ta»ataf.—
SoBd ......
Solid —
Solid
Sofey ™—.
liquid—
Air pollution control dutt/ttudg*..
Anhydrous preott «ra*MMtar._
Trtatad raskkM
crirorfM ore.
Basic oxygan fumac* and open rwanti far-
naca air poNutkm comrel dutt/akidga.
DMttC OJty9^fl RjtflVKM WO OpSO nflttral nyp*
Liquid
Titarnum i
240,000
4.830,000
78,000
503.91S
11,044
268.780
4.300.000
$1,662
724,506
858,000
15,813
2.46S.OOO
87,402,600
W/H
60.892
553,844
W/H
8
C
A.8, D
C
A.C
C
C
a. c
a
A.C.D
ac
8
A.C,f
A.»
A. a
2
24
28
S
17
1
18
2
25
26
2
Yam,
YM.
Y*a.
No.
Ym.
YM.
YM.
YM.
No.
No.
-------
DIR. No. 9541.00-14
Federal Raster / Vol. 55, No. IS / Tuesday, January 23, 1990 / Rules and Regulations
2341
TABLE f.—RESULTS OF Apptviwa THE HIGH VOLUME CRITERION TO TWENTY CONDITIONALLY RETAINED PROCESSING WASTES*—
Continued
Commodity sector
Titan
Titan
/:•*-
Total
Total
number of wastes meeting high volume
number of wastes failing fugh volume en
Conditionally ratified waste
Sulfate
Ghlori*
Slag ....
criterion
tenon ....
SOM If feud
Solid
! Solid
Avaragn par
facility
generation
(mt/yr)
W'H
89,349
157.000
Moles
A. C
A. 3
3
No. o»
reporting
2
t
Passes hijrt
volume
cntenon
No.
Yes,
Yes.
19
4
"Data are from 1989 National Survay of SaM Wastes from Mineral Processing Faoliies, Bates?1, as noted.
W/H—wrttweid to svod sscicsinf sonftderwaJ bysnass inftymaton (C3l).
A. The aata tcf one 01 mora ol ;na generating facuues era C3I.
8. Generation dan are sotainad oirsctty from the suivey,
C. Calculated or imeroretea 6y SPA oased on inforraoon arovidsd in the survey ard subfe comments.
0. Oa;a prasomea i» rrom orie facility; one or mow of !«« generating faoinies are CBI. Heconed numeer was not used to make 3«viil determination: average
lccing C8I taciiifles does not crwrge 9evill status.
E. Generation data was oCtairvad from the survey for 12 facilities; data for 13 faalties was reported by AiSI.
C. Compliance with the Low Hazard
Criterion
Consistent with the low hazard
criterion established on September 1,
1S89, the Agency has used only waste
analysis data derived using EPA Method
1312 because there was no compelling
evidence that any of the 20 mineral
processing wastes "is generated at five
or more facilities; and substantial
additional relevant data are available
and the preponderance of these
additional data indicate that the waste
should be considered low hazard." (See
54 FR 38630.) The majority of the
Method 1312 data used are the result of
EPA sampling at selected facilities, but
some results aie for split samples or
other sample analysis results provided
by operating facilities.
fa addition, for today's final rare, the
Agency has utilized newly available
data from EPA'a 1989 waste sampling
effort to make low hazard determination
for certain waste streams or components
of waste streams that may have been
included by redefinition or clarification
of the waste stream or the operation's
process in today's final rule. Final
results of EPA's application of the low
hazard criterion are presented in Table
2.
1. Treated Residue from Roasting/
Leaching of Chrome Ore
With the clarification that the waste
in question is the treated residua from
roasting/leaching of chrome ore and not
the waste as it leaves the leaching
operation, EPA has reviewed its waste
sampling data of the treated residue,
and has confirmed that the treated
residue passes the low hazard criterion.
2. Process wastewater from coal
gasification
With the determination that process
wastewater from ccal gasification is
"stripped gas liquor," EPA has reviewed
the sampling data for the stripped gas
liquor generated at the facility, and
established that the waste stream as
redefined is a low hazard liquid waste.
3. Process wastewater from primary
lead production
The Agency has responded to
concerns from one commenter that a
composite wastewater sample taken at
one facility was not a sample of their
process wastswater, but included
additional process waste streams. In
response, EPA analyzed non-composited
samples of slag granulation water,
which reportedly accounts for more than
90 percent of the process wastewater at
this facility. This sample was found to
exceed the low hazard criterion-
Because the process wastewater also
exceeded the criterion at a second
facility, EPA concludes that this waste
stream is not low hazard.
TABLE 2.— R ESULTS OF APPIYINQ THE Low HAZARD CRITERION TO TWENTY CONOITIONAU.Y
WASTES
iNED MINERAL PROCESSING
ComrxxlJty Mctor
CondrwaiJy retaimd waata
Nofac.
rlQ.
No. ol fac.
iat2 dam
Reason tor
raHurw
MitflM
' treatmart plant
Eiofiwnxt pr^ospftoru9».
Ryofo^ypsum ,.«...MM..
PFOCMI wasttwawr-
aod.
Proc»s« w««»wtter.....
Air pollution control dust/tiudga..
Amiyrjrout procxt wutiwtiM w
Proc«n w«at*waMf
residue from roatana/Laactv^ o(
1
t
Z
a
s
3
30
30
5
28
f
2»
Z
-------
2342 Federal Register / Vol. 55, No, 15 / Tuesday, January 23, 1990 / Rules and Regulations
TABLE 2.—RESULTS OF APPLYING THE Low HAZARD CRITERION TO TWENTY CONDITIONALLY RETAINED MINERAL PROCESSING
WASTES—Continued
Commodity sector
Start .„ „
Steel _...„ .... ....
"ntantum dioxide ,— ...
Titanium tetracfitonde * ..
Zinc
Total number of wastes meeting low hazard c
Total numoer of wastes failing low hazard critc
Conditionally retained waste
Basic oxygen furnace and open hearth fur-
nace air pollution control dust'aludqe.
Basic oxygen rumace and open hearth fur-
nace slag.
Sulfate process waste solids —
Slag
iteiioFi ....
No. of fto.
believed to
generate
waste
27
27
2
2
9
^
No. of fae.
sampled by
EPA
3
3
2
2
3
1
No. of lac.
submitting
(named
13t 2 data
0
0
0
0
0
0
Passes low
hazard
cntanon
Yes ...
Yes
No
Ye»
Yes
Yes
Hion..... „ „ „ . . ,. ...
Reason lor
taiiura
N/A
N/A
PH. Cr
N/A
N/A
N/A
18
2
D. Bevill Status of Conditionally
Retained Mineral Processing Wastes
The Bevill status of the 20
conditionally retained mineral
processing wastes is presented in Table
3. Fifteen of the 20 wastes have been
retained and will be studied in the
Report to Congress and addressed by
the subsequent Regulatory
Determination. The other five wastes.
will, as of the effective date of this rule.
become subject to regulation as
hazardous wastes under subtitle C of
RCRA if they exhibit hazardous
characteristics.
TABLE 3,—RESULTS OF APPLYING BOTH BEVILL CfliTEHiA TO TWENTY CONDITIONALLY RETAINED MINERAL PROCESSING WASTES
Commodity sector
Conditionally retained wast*
No. oJ
(•«.
believed
to
generate
waste
Passe* hign
volume
cnMnon
Paseee kjw
hazard
criterion
Coal Gas...
Elemental Phosphorus..
Calcium sulfate wastewater treatment plant slug*.
off-gas solids...
Iron.,
Iron.,
Air pollution control dust/sludge..
Process wastewater
Steel..
Anfiydrous process wastewater _—_
rnxeii wastewater.,„ ~-~. « ~~ ...™.™.~™
Treated residue from roasting/lead-wig of dvome
ore,
Basic oxygen fumtnce and open hearth fur.iaca air
pollution control dust/sludge.
Sorfate process waste i
Sutftte process waste toba*,
1 Yes
1
2
2
5
3
3
30
30
5
28
1
28
2 Yet
27
27
2
2
9
1
Yet-
Yet..
Yet-
Ye«
Total number of wutet retained wttiin Bev* i
du
Total number of waste* withdrawn from Sevil excki
IV. Analysis of and RosponM to
Comments on Clarificatioa to the
Definition of "Designated Facility" and
Modification of tho Standardt
Applicable to Generators of Hazardous
Waste
In the proposed rule of September 25,
1989, EPA proposed a clarification to the..
definition of designated facility
regarding waste shipments from a state
where a waste is subject to the
hazardous waste regulations to a state
where the waste is not yet regulated as-
hazardous. This circumstance can arise
when EPA lists or identifies a new
waste as hazardous under its pre-
HSWA authority. In such a case, the
waste is subject to RCRA hazardous
waste regulations only in those states
that do not have interim or final
authorization to operate the RCRA
program. In a state authorized by EPA to
operate a hazardous waste program in
lieu of the federal program (under the
authority of section 3008 of RCRA), the
waste would not be subject to RCRA
requirements until the state revises its
program to classify the waste as
hazardous and receives EPA
authorization for these requirements.
This set of circumstances results from
the fact that RCRA allows states a
specified time to adopt new regulations
in order to minimize disruptions to the
implementation of authorized state
programs. In contrast, that situation
does not occur when the wastes are
mewly listed or identified pursuant to
the HSWA authorities since Congress
-------
OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55. No. 15 / Tuesday, January 23, 1990 / Rules and Regulations 2343
specified that IISWA provisions are lo
be implemented by EPA In all slates
until such time as states are authorized
to implement the new regulations,
EPA's generator regulations require a
generator of hazardous waste to
"designate on the manifest one facility
which is permitted to handle the w«Bte
described on the manifest.' (See 40 CFR
202.20). The regulations clearly state
that the facility designated on the
manifest is the "designated facility"* as
defined in § 2(30.10 (See the direct
reference in the definition of
"designated facility" to the manifest
requirement in | 282.20). A designated
facility as currently defined in 40 CFR
260,10 must either (1)nnv* nn EPA
permit (or interim status) in accordance
with parts 270 and 124, (2) have a permit
from a state authorized in accordance
wilh part 271, or (3) be a recycling
facility that is regulated under
§ 261.tj(cj(2) or subpart F of part 2(50, and
must also be designated on the manifest
by thn generator pursuant lo § 262,20.
It has become apparent that when
promulgated in 19UO, the definition of
"designated facility" did not
contemplate the above situation wh!<*h
has potentially brond impacts on the?
RCRA program. EPA's current
interpretation of the statute in that the
manifest requirement sod thn definition
do not apply Jo materials lhat are not
officially identified as RCRA hazardous
wastes in the state thnt is receiving the
wastes. Today's clarification amends
the definition of "designated facility"
and the standards applicable to
generators of hazardous waste in 40
CFR 262.23, in order to make Ibis
Interpretation clear to the public and the
regulated community.
A. General Comments on iJic Pwpnsed
Definition
A number of conrpenters supported
EPA'a effort to clarify the existing
regulations so that the parties affected
by non-HSWA waste identifications and
listings know the status of these wastes
and the management standards ihat
apply to them when they sra shipped
across state borders. These eonimenfers
indicated that the proposed revision to
the definition of "designated facility" in
§ 260.10 offers additional clarity and an
appropriate level of flexibility to assist
both the regulatory agencies and the
regulated community. Several
commenters also supported the
proposed change to § 202.23 by adding
paragraph (e) to clarify the requirement
that the generator must ensure that the
designaied facility returns the manifest
to the generator to complete the waste
tracking procedures as required by
RCRA regulations.
Two commenters argued that the
statute prohibits EPA from making this
change to the definition of designated
facility. These commenlers pointed out
th;it RCRA Section 3002 (a)(5), which
sets out standards applying to
hazardous waste generatois, requires
use of a manifest system
* * * to assure tlint all such hazardous waste
if designated for Irealment, stw?glber Ihnn fnciiitl'si on
the premise* where the waale is generated)
for which a permit hns been issued an
provided in the subtitle * * * (emphasis
ndtled).
Section 3003(a)(4), pertaining to
transporters, contains substantially
similar language.
The commenter argue* that these
provisions require materials that
officially have the status of RCRA
hazardous waste to go to facilities
holding Subtitle C permits. EPA
generally agrees with this view. El1 A,
however, notes that the mining wastes
lhal become hazardous wastes as a
result of this federal rule will not have
official status as RCRA Subtitle C
wostes in ell slates at the same time.
New RCRA rules—including new waste
identification mlos—that are
promulgated ucing statutory authorities
in effect before the 19841ISWA
amendments take effect only in states
thnt are not yet authorized to implement
the pre-1984 RCRA hazardous waste
program. Currently, only 7 states Ifiek
nutJjorizRtion for tho pre-1384 program.
Consequently, today's rule will take
effect only in those states. In all other
states, Subtitle C regulation of these
wastes must wait for the states to
promulgate parallel regulations or
statutory changes, and obtain EPA
approval to implement these new
additions to their Subtitle C programs,
This process can take many monthn. See
generally 50 FR 28729-28730 (July 15,
1905), describing RCRA Section 3008.
See nlao the state authorization section
to today's notice.
Consequently, EPA believes that the
"permitted facility" requirements of
section* 3002(a)(5) and 3003(a)(4) apply
only within the boundaries of those
states where the relevant mining wastes
have officially attained the status of
RCRA-regulated subtitle C "hazardous
wastes," Status as a "hazardous wnsts"
is, indeed, the basic prerequisite for the
exercise of any subtitle C jurisdiction. If
a material It not yet a hazardous waste
In tht state to which it Is sent for
treatment, storage, or disposal, no
subtitle C regulations apply. A manifest
is not legally required, and the facility
that accepts the waste need not have «
subtitle C permit. EPA, in fact, would be
unable to enforce manifest and
permitting requirements in a state where
a material is not yet a subtitle C
hazardous waste.
Since at least two interpretations of
the statute are possible, EPA may
exercise its discretion to choose the
view that best promotes the overall
policy goals of RCRA. EPA believes that
there are sound policy considerations
favoring the "jurisdictional" view, which
considers the materials RCRA
hazardous wnste status to be a
jurisdictional prerequisite.
The commenters' interpretation of
RCRA sections 3002(a)(5) and 3003(a)[4)
would force newly regulated wastes that
are generated in unauthorized states to
he managed in those states. Essentially,
these wastes would be "trapped" In
these unauthorized states, and they
could only be managed in avoidance
with the treatment, storage, and disposal
alternatives that are available In thono
states (which could be limited). This is
primarily because TSD facilities in
authorized states would not be able to
obtain the necessary permit
modification or change in interim status,
Since the wastes are not yet hazardous
in these states. One problem which con
nrise from this situation is that the
facilities best suited to the management
of wastes which are newly listed or
identified may not be located in the
states where the rulemaking is in effect
The Agency believes that such facilities
should not be precluded from accepting
wastes from states whore the rule is in
effect while the state in which they ore
located is seeking authorization for the
waste stream.
One example of particular interstate
concern involves a mixed waste strenm
(i.e., a waste stream that contains both
hazardous waste and radioactive waste)
called scintillation cocktails.
Scintillation cocktnils are commonly
generated by approximately 10,000
hospitals and universities across tlirt
country. This waste stream became
regulated pursuant to non-HSWA
authority as described in the July 3,
1988, Federal legister notice, and
therefore were Initially regulated under
the RCRA program only in the
unauthorized states. Approximately 80
percent of the national capacity for
treatment of these particular wastes
resides with one facility. The Agency
understands that this facility is in
compliance with state standards that
are equivalent to the federal RCRA
requirements. However, the facility Is
located In a state that has not yet
received mixed waste authorization, and
therefore the facility does not have a
4'
I.,- f
-------
2344
Federal Register / Vol. 55, No. 15 / Tuesday, January 23. 1990 / Rules and Regulations
RCRA permit or interim status. If all
these scintillation cocktails were
required to go to RCRA permitted
facilities as suggested by these
commenters, a significant number of
waste shipments from thousands of
generators would be disrupted. In fact.
in this case the Agency believes that
such a restriction would generally result
in less protective waste management
since it is doubtful that ihe wastes
would be treated and recovered to the
same degree as is presently occurring at
this large facility.
The Agency would also like to point
out that, tvithout the flexibility provided
by today's rule, there would likely be a
significant disincentive for states to
adopt new waste listings unless they
were confident that adequate treatment,
storage, or disposal capacity exists for
wastes within the state. This is because
generators In the first few states to
adopt the waste listing would not be
able to send their wastes to facilities in
other authorized states (which are the
vast majority of states) that have not
adopted the listing because the TSD
facilities in these states would not be
able to obtain the necessary RCRA
permit modifications or changes in
interim status. EPA believes that this
disincentive would not be desirable.
The same two commenters, in arfjuing
that EPA's proposal should be
withdrawn, contended that there is no
firm evidence that the problem
hypothetieally facing the regulated
community actually exists. The
commenters stated that the problem is
miniscule, if not completely illusory. The
commenters indicated that the problem
that EPA attempts to address In thn
rulcmaking could only arise if EPA lists
or identifies a waste as hazardous
pursuant to non-HSWA authorities: the
generator needs to send the waste off-
sile and Ihe only available off site waste
facilities capable of managing the waste
are located in authorized state*. The
commenters indicated this scenario
would occur in only a very limited
number of circumstances, end therefore
does not warrant any change to the
definition of designated facility. The
commenters go on to say that EPA can
only identify three non-HSWA
rulemakings resulting in newly listed or
identified wastes,
EPA strongly disagrees wilh the
statement that this Is an illusory
problem for the following reasons. In the
September 25 proposal, EPA Identified
three recent non-HSWA rules only as
illustrative'examples of situations writ-re
interstate-shipments could be a proMom.
However, there have been other non-
HSWA rulei that list or bring in new
waste streams, namely: Redefinition of
solid waste'(January 4,1985); and mixed
waste (July 3,1986). Furthermore, the
Agency recently proposed additional
non-HSWA listings for wood preserving
wastes, and may in the future consider
the regulation of other waste streams
under the Agency's pre-HSVVA
authority. Furthermore, as discussed in
the mixed waste scintillation cocktail
example above, the Agency has already
encountered situations of interstate
shipments affecting thousands of
generators, indicating that the problem
being addressed in today's rule is a real
one and deserves clarification.
The same two commenters argued
that EPA's proposal could create a
disincentive for waste generators to ship
their wastes to licensed hazardous
waste facilities. This disincentive could
result from allowing the generator to
choose to ship its hazardous waste to
either a hazardous waste facility or •
nonhazardous waste facility. Given the
alternatives, a generator may simply
choose the least cost option.
The Agency acknowledges that this
approach to interstate shipments may
appear to be a disincentive to the
management of these hazardous wastes
in subtitle C facilities. However, the
Agnncy believes that there are other
circumstances that mitigate this
apparent disincentive. First, this
situation is temporary. States are
required to adopt federal RCRA waste
listings or identifications within
specified deadlines. Second, until that
regulatory adoption, these wnstns will
be regulated under subtitle D of RCRA
and any other applicable requirements
of the receiving state. Last, some
generators will elect to send their
wastes to subtitle C facilities or other
facilities that perform equivalent
treatment in order to minimize any
potential future liability resulting from
the management of their wastes.
Tha two commenters also noted that
the practice of shipping newly listed or
identified wastes to facilities in states,
where the waste is unregulated would
be limited to the period of time an
authorized state requires to promulgate
the new listing or characteristic.
However, the cornmenteri maintained
that while such a period is finite, it is
not necessarily short and can take up to
three and a half years, assuming that
authorized states comply with EPA
regulations for revising state programs.
The commenter further indicated thai
there are no Immediate consequences
for Ihe state or th* regulated community
in that state if tho state fail* to meet
these deadlines.
It ahould be recognized that the three
and a half year period is the maximum
allowed by the state authorization
regulations. Generally, states are
required to adopt federal program
changes within two years (or three years
if the state needs to amend its statute).
Some extensions of these deadlines are
available. However, EPA. recognizes
that while some states have been able to
meet the authorization deadlines, others
have not due to the number and
complexity of the changes to RCRA
regulations in the past few years. Tho
Agency intends to place increased
emphasis on prompt state adoption of
new waste listings to ensure uniform,
national coverage of newly listed or
identified wastes, !t should also be
noted that there is a lag time between
state adoption of a requirement and the
official EPA action to authorize that
stale to implement the regulation under
RCRA authority. Therefore, in many
cases states are regulating these new
activities in a manner equivalent to the
RCRA program well before they have
receiverf authorization.
B. Relationship Between Today's
Clarification and Non-RCRA State
Hazardous Wastes
One commenter was concerned about
the situation where a waste is generated
in a state which, as a matter of state law
only, regulates the waste as hazardous,
but is transported to a receiving state
that does not. In this case, the receiving
state is under no federal compulsion to
amend its regulations to add that waste
to its list of hazardous wastes, since the
listing of the non-RCRA waste is a
matter of state law. EPA has no
jurisdiction over this situation. Thus,
this clarification of the definition of
designated facility does not apply to
state listed non-RCRA hazardous waste.
A second commenter shared the
above concern but also stated that
EPA's proposed clarification does not
distinguish between state and federally
classified hazardous waste. The
commenter contended that the Agency
should stipulate that this clarification
only applies to federally regulated
wastes, that the Agency did not intend
to preclude the receiving state from
designating the type of facility which
can manage such state-classified
hazardous waste, and that federal
authorization is irrelevant to the
Interstate transportation of state-
classified wastes.
The Agency recognizes tht issue
presented by the commenten however,
EPA believes that this is not a comment
on the clarification to the definition of
the term "designated facility" 09
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Federal Register / Vn!. r«G, Ho. 15 / Tuesday, far-.ia-y
DIR. No. 9541.00-14
19(10 / Rutes and Regulations 2345
proposed on September 25,1f?B9.
the Issue raised by this commenter
confirms the requirements cf Ibe currnnl
doffnition, Indeed, the current defirjtion
does not apply to non-ECRA harqrdrms
wastes since it only applies lo the
hazardous wastes that the Federal
gcwernmeiit has authority to regulate
(i.e., federally listed or identified
hazardous wastes). If a s'.-ile chnosrd lo
be more stringent nnd rpjjuls'e
njdilional wastes nut reyihifed unt!(!r
RCRA, that stole must nd.-ipt it's RCRA
regulations with regard to Ihe definition
of designated facility to uccomroodn!*;
these new wastes. K;ich sta^a must
ds'-enninc, Sherpfore, hm il will m;:;!«>•»>
the otit-of-st»te shipment of state-listed
wastes. Furthermore, ihn Ag?nry decs
not, under (he original def'niljrin -ir this
subsequent claniiaiiion, intend to
specify to authorized states (he types of
facilities that can manage $Wn-
elnssified hazardous wastes. Finally,
EPA nlr,o does not, wish this ciariiicaliun
or the original rule, s the
treifnwnt, storage, or disposal of
hazardous waste, rather than the
standards of the receiving state berac.se
il would ba extremely burdensome for
the generator of a hazardous waste lo
Icwp track of the continuously evolving
hnsurdous waste regulations of a!) fif!y
Hf»fl»S.
The Agency disagrees w i!h this
r.'imrn enter. A state can only apply its
laws and regulations to farilii'ps over
which Ihfy have jurisdiction (i.e.,
facilities within the stated boundaries).
Therefore, if a generator is sending
wastes to a facility out-of-staJi, the
treatment, storage, or disposal
standards that apply are those of the
stale wheie the TSD facility is lotwtrtd.
It is incumbent on the generator to knoiv
the reijuirenients of the stales where ihe
wastes will be managed. However,
much of the responsibility for complying
with the receiving state's regulation1?
fads on the TSD facility. In most cap eg,
the generator simply has to ask a
potential receiving TSD facility if i) is
«i!c3wed to manage the generator's
wnstes by its state government. The
Agency does not believe that this is
particularly burdensome lo the
pen»:rslor.
E. Other Comments
A minor technical correction is ;I!TO
included in the rule language of
"designated facility" to clarify that nn
interim status facility in an au'honzfid
state may be a designated facility. EPA
believes that it is universally understood
Ihot these interim status fucitiiiea can
nctiept hazardous waste shipments, and
this was" the original intent of the
provision. Therefore, in the first
sentence of the role n parenthetical
clause is added with the words "or
interim status'1,
The Agency has noted nn»J entrrefed
Ihc typographical error that appeared in
the proposed rule as follows: Under
proposed f 280.10(4), the generator Is
designated on the manifest pursuant to
8 202.20, not { 260.20.
F, Manifesting requirements
Today's clarification will not alter the
requirement that a generator offer his
waste only to transporters who have
EPA identification numbers. (See WCHR
202,12}c)). Thus, if a newly listed waste
is trnnsfered between transporters in a
state where the waste Is not yet
hazardous, both transporters should be
identified on the manifest. The initial
transporter Is still required to keep the
copy of the manifest on file.
fa order to ensure that the wosle
reaches the designated facility, EPA i»
requiring the generator to arrange lh.it
thp designated facility owner or
operator sign and return the manifest to
the generator, and that out-of-ntatn
tiansporters sign and forward the
manifest to the designated facility. The
return of the manifest to the generator
will "close the loop" on the disposition
of the generated waste and allow Ihe
generator to attempt to resolve any
discrepancies in the manifest, as
required by 40 CFR 262.42. This ne»v
requirement parallels She requirements
in 40 CFR 204,71 3rd 263.71. However,
as opposed to those acctiorra, which,
require the receiving facility to return
the manifest, § 262.2,)(e) puts the burden
on the generator to ensure the return of
the manifest when the waste is sent Jo a
facility in a state not yet authorized to
treat the waste as hazardous. EPA
believes that this approach is
appropriate, since the facility receiving
the waste aad any out-of-state
transporters may not be subject to
subtitle C regulation, if they do not
otherwise handle any RCRA hazardous
wastes. It should be noted that with this
approach the designated facility and
out-of-state transporters are not
i squired to obtain F.PA identification
numbers since the waste is not
hazardous in their state. (Of couis;;,
once the state becomes authorized to
regulate the particular waste as
hazardous, the facility would n«id a
RCRA Subtitle C permit (or inlen'm
status) to continue managing the waste
and all transporters would need EPA
identification numbers.)
V. Regulatory Implementation and
Effective Dates of the Final Ruin
EPA is finalizing this rule in
accordance with the March 14,198f)
order of the U.S. Court of Appeals for
the D.C. Circuit (see Enrirovmen/al
Defense Fund v. EPA, 852 F.2d 1310
(D.C, Cir. 1900) cat denied, 109 S.Ct.
1120 (1989)). As of the effective dole of
this final rule (i.e., six months after
today or July 23,1900, the five mineral
processing wastes for which the
temporary exemption from subtitle C
regulations (previously provided by
RCRA section 3001(b)(3)(A)(ii)) is being
removed by today's rulemaking may be
subject to subtitle C requirements in
those states that do not have
authorization to administer their own
hazardous waste programs in lieu of
EPA. Generators, transporters, end
treatment, storage, and disposal (TSD)
facilities that manage any of these five
Reproduced from
best available copy.
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2346
Federal Register / Vol. 55, No, 15 / Tuesday, January 23, 1990 / Rules and Regulations
wastes In authorized slates will be
subject to RCRA requirements imposed
as a result of this final rule only after the
state revises its program to adopt
equivalent requirements and EPA
authorizes the revision.
The requirements imposed as a result
of removing the temporary exemption
include: Determining whether the solid
waste(s) exhibit hazardous
characteristics (40 CFR 262.11) and, for
those wastes that are hazardous,
obtaining an EPA identification number
for managing hazardous wastes (40 CFR
262.34); complying wilh recordkeeping
and reporting requirements (40 CFR
262.40-282,43); and obtaining interim
status and seeking a permit (or
modifying interim status. Including
permit applications or modifying a
permit, as appropriate) (40 CFR Part
270).
A, Section 3010 Notification
When EPA published its September 1,
1989 Final rule (54 FR 30,192), the Agency
removed the temporary exemption from
subtitle C regulations for ail but twenty-
five mineral processing wastos. In that
rulemaking, the Agency indie-tied 'hat
all persona generalint;, t> nnsporting,
treating, storing, or disposing of one or
more of those wastes were to notify
either EPA or an authorized slate within
90 days (I.e., by November 30,1989) of
such activities, pursuant to section 3010
of RCRA, if those wastes are
characteristically hazardous under 40
CFR part 281, subpart C. (see 51 FR
30032.] Following the publication of the
September rule, however, a number of
facilities expressed confusion regarding
the notification requirement because
section VII of the preamble to the
September 1,1989 final rule also stales
that "the final rule is not effective in
authorized states because its
requirements are not bfiing imposed
pursuant to the Hazardous and Solid
Waste Amendments of 1984." (See 54 FR
30033). This statement was correct in
regard to the requirement to file a part A
permit application and TSD standards.
it was not correct in regard to section
3010 notification, which was intended to.
apply to all persons generating,
transporting, treating, storing or
disposing of hazardous wastes identified
by characteristics regardless of whether
in an authorized state or not. Because
the September 1.1989 finnl rule removed
a temporary exemption and thus
identified as characteristically
hazardous some wastes, section 3010
required notification wllhin 90 days.
Because some potentially affected
facilities may have been confused by th»
September 1 premable and because the
Agency has not yet published a
clarification, EPA is today eliminating
the notification requirement established
by the September l final rule for
facilities in authorized states. For
facilities in unauthorized states, the
deadline for compliance with the
notification requirement established by
the September 1 rule is being extended
until 90 days following today's
publication (i.e., April 23,1990). EPA has
concluded that it is appropriate to waive
the notification requirement in
authorized states because (1) the
universe of newly regulated activities
will be identified when state regulations
are revised, as they must be for the
states to retain authorization; and (2)
RCRA identification numbers provided
to notifiers in authorized states are
obtained by the state from EPA, so in
this way EPA is informed of the
notifications that authorized states
receive.
Accordingly, not later than 90 days
following today's publication (i.e., April
23,1090), all persons in unauthorized
states who generate, transport, treat,
store, or dispose of wastes that (1) are
removed from the Bevill exemption by
this final nils, and (2) are
characteristically hazardous under 40
CFR part 281, subpart C, must notify
EPA of such activities pursuant to
Section 3010 of RCRA. Notification
instructions are set forth in 45 FR 12748.
Persons who previously have notified
EPA or an authorized state of their
activities pursuant to section 3010 of
RCRA, (i.e., persons who previously
have notified EPA or an authorized state
that they generate, transport, treat, store
or dispose of hazardous waste and have
received an identification number—see
40 CFR 282.12, 263.11 and 285.1) need not
re-notify." Persons without EPA
identification numbers are prohibited
from transporting, offering for transport,
treating, staring, or disposing of
hazardous wastes.
For the same reasons discussed
above, facilities managing wastes
removed from the exclusion in
authorized states need not notify EPA or
an authorized state within 90 days of
today's rule. Section 3010 Notification
will be required of such facilities after
the state receives authorization or
otherwise amends its program to
regulate these or require such
notification.
B. Compliance Dates for Today's Rule
1. Interim Status and Permit
Modifications in Unauthorized Slatus
Facilities In unauthorized states that
currently treat, store, or dispose of
wastes that have been removed from
temporary Bevill exclusion and are
characteristically hazardous under 40
CFR Part 261, Subpart C. but have not
received a permit pursuant to Section
3005 of RCRA and are not operating
pursuant to interim status, may be
eligible for interim status (see Section
3005(e)(l)(A)(ii) of RCRA, as amended).
In order to operate pursuant to ir-.jRrim
status, such facilities m;is« submit a
Section 3010 notice pursuant to 40 CFR
270.70(a) within 90 day? of today's final
rule (i.e., by April 23,1990, * and must
submit a part A permit application
within six months of today's final rule
(i.e., by July 23,1990). Under section
3005(e)(3), land disposal facilities
qualifying for interim status under
section 3005(e)(lJ(A)(ii) must also
submit a part B application and certify
that the facility is in compliance with all
applicable ground-water monitoring and
financial responsibility requirements
within 18 months of todey's final rule
(I.e., by July 23,1991). If the facility fails
to do so; interim status will terminate on
that date.
Completion of final permit application
will require individual facilities to
develop and compile information on
their on-site waste management
operations including, but not limited to,
the following activities: Ground-water
monitoring (if waste management on
land is involved); manifest systems,
recordkeeping, and reporting; closure
and, if appropriate, post-closure
requirements; and financial
responsibility requirements. The permit
applications may also require
development of engineering plans to
upgrade existing facilities. In addition,.
many of these facilities will, in the
future, be subject to land disposal
restrictions (LDRj standards. As
explained in the September 1,1989 final
rule and in the proposed LDRs for third
scheduled wastes (54 FR 48372, 48192;
November 22,1989) EPA considers
wastes that are brought under Subtitle C
regulation by today's,final rule to be
"newly identified" wastes for purposes
of establishing LOR standards under
section 3004(g)(4) of RCRA. (54 FR
36624). Accordingly, EPA has proposed
that newly identified mineral processing
* Under Ihe Solid Waste Dispwal Amendments of
1980. (Pub. L. 89-482) EPA was given the option of
waiving the notification requirement under section
3010 of RCRA following revision of the wctlon 3001'
refiulntioni, at the dixcrotlon of the Administrator.
* Except persons who previotiiljr have notified
EPA or an authorized itate that they generate,
Iramport treat, fiord or dlspoia of hazardous wntle
and have received an Identification number.
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OSWER DIR. No. 9541.00-14
Federal Register / Vol. 55, No. 15 / Tuesday, January 23, 1990 / Rules and Regulations 2347
wastes not be subject to the BDAT
standards that the Agency proposed on
November 22,1909 for characteristic
hazardous wastes. As required by
RCRA section 3Q04(gH4){C), EPA plans
to study the mineral processing wastes
removed from the temporary exemption
to determine BDAT for ones that exhibit
one or more characteristic of a
hnzardous waste.
All existing hazardous waste
management facilities (as defined in 40
CFR 270.2) that treat, store, or dispose of
hazardous wastes covered by today's
final rule, and that are currently
operating pursuant to interim status
under Section 3005(e) of RCRA, must file
with EPA an amended Part A permit
application within six months of today's
publication (i.e., by July 23, 1990), in
accordance with § 270.72(a).
Under current regulations, a
hazardous waste management facility
that has received a" permit pursuant 1o
Section 3005 may not treat, store, or
dispose of the wastes removed from the
temporary exclusion by today's final
rule, if those wastes are
characteristically hazardous under Id
CFR Part 261, Subpart C. when the find
rule becomes effective {i.e., July 23.1990)
unless and until a permit modification
allowing such activity has occurred in
accordance with 8 270.42. Consequently,
owners and operators of such facilities
will want to file any necessary
modification applications with EPA
before the effective date of today's final
rule. EPA has recently amended its
permit modification procedures for
newly listed or identified wastes. (See
40 CFR 270.42(g),) For more details on
the permit modification procedures, see
53 FR 37912, September 28,19B8.
2. Interim Status and Permit
Modifications in Authorized States
Until the state is authorized to
regulate the wastes that are being
removed from temporary exclusion by
today's final rule mid that are hazardous
under 40 CFR part 281, subpart C, no
permit requirements apply. Facilities
lacking a permit, therefore, need not
seek interim status until state
authorization is granted. Any facility
treating, storing, or disposing of these
wastes on the effective date of state
authorization may qualify for interim
status under applicable state law. Note
that in order to be no less stringent than
the Federal program, the state "in
existence" date for determining interim
status eligibility may not be later than
the effective date of EPA'i authorization
of the state to regulate them wastes.
These facilities must provide the state's
equivalent of a part A permit
application as required by authorized
state law.
Finally, RCRA section 3005(e) (interim
status) or any authorized state analog
apply to waste management facilities
qualifying for state interim status. For
those facilities managing wastes under
an existing state RCRA permit, state
permit modification procedures apply.
VI. Eifect on State Authorizations
Because the requirements in today's
final rule are not being imposed
pursuant to the Hazardous and Solid
Waste Amendments of 1984, they will
not be effective in RCRA authorized
states until the siste program
amendments are efffective. Thus, the
removal of the temporary exclusion will
be applicable six months after today's
publication (i.e., on July 23,1890) only in
those few states that do not have final
authorization to operate their own
hazardous waste programs in lieu of the
Federal program. In authorized states,
the reinterpretation of the regulation of
non-excluded processing wastes will not
be applicable until the state revises Its
program to adopt equivalent
requirements under state law and
receives authorization for these new
requirements. (Of course, the
requirements will be applicable as state
law if the state law is effective prior to
authorization).
Based on the scope of today's final
rule, states that have final authorization
(40 CFR 271.21{eJ) must revise their
programs to adopt equivalent standards
regulating non-Bevill mineral processing
wastes that exhibit hazardous
characteristics as hazardous by July 1,
1901 if regulctory changes only are
necessary, or by July 1,1992 if statutory
changes are necessary. These deadlines
can be extended by up to six months
(i.e., until January 1,1992 and January 1,
1993, respectively) in exceptional cases
(40 CFR 271.21(e)(3)). Once EPA
approves the revision, the state
requirements become RCRA Subtitle C
requirements in that state. States are not
authorized to regulate any wastes
subject to today's final rule until EPA
approves their regulations. Of course,
states with existing standards that
address these wastes may continue to
administer and enforce their regulations '
as a matter of state law.
Currently unauthorized states that
submit an official application for final
authorization less than 12 months after
the effectiva date of today's final rule
{i.e., before January 23.1991) may be
approved without including an
equivalent provision {i.e., to addresi
non-Bevill mineral processing wastes) in
the application. However, once
authorized, a state must revise its
program to include an equivalent
provision according to the requirements
and deadlines provided at 40 CFR
271.21 (e).
VII. Economic Impact Screening
Analysis Pursuant to Executive Order
12291
Sections 2 and 3 of Executive Order
12291 (46 FR 13193) require that a
regulatory agency determine whether a
new regulation will be "major" and, if
so, that a Regulafory Impact Analysis
(RIA) be conducted. A major rule is
defined as a regulation that is likely to
result in one or more of the following
Impacts:
(1) An annual effect on the economy
of $100 million or more;
(2) A major increase in costs or prices
for consumers, individuals, industries,
Federal, State, and local government
agencies, or geographic regions; or
(3) Significant adverse effects on
competition, employment, investment,
productivity. Innovation, or on tho
ability of United States-based
enterprises to compete with foreign-
based enterprises in domestic or export
markets.
Today's final rule completes the
Agency's revised interpretation of the
Bevill Mining Waste Exclusion for
mineral processing wastes. The first part
of this reinterpretation, dealing wilh the
vast majority of individual mineral
processing waste streams, was made
final on September 1.1989, The
preamble to the September 1 rule
presented the results of the Agency's
economic impact screening analysis,
covering scores of small volume mineral
processing wastes, and examining cost
impacts associated with 39 potentially
hazardous low volume wastes in detail.
This analysis indicated a total annual
compliance cost for subtitle C waste
management of about $54 million. As
indicated in section III of this preamble.
today's final rule removes five
additional processing wastes from the
Bevill exclusion and subjects them to
regulation under subtitle C of RCRA if
they exhibit hazardous characteristics.
Consistent with Executive Order
12291, the Agency has completed a
revised economic impact screening
analysis for the five mineral processing
wastes removed from the Bevill
exclusion by today's rule. These
revisions account for changes in the
Bevill status of certain wastes since the
September 25,1989, NPRM and
comments received on the original
analysis. Results of this revised analysis
suggest that three of the five waste
streams are likely to exhibit hazardous
characteristics at some or ill of the
• I • ;•
'
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23-13 Federal Register / Vol. 55. No. 15 / Tuesday, January 23. tano /Rules and Regulations
facilities that generate them. One
additional waste stream (air pollution
control solids from lightweight aggregate
production) may be regulated at some
facilities under the subtitle C "derived-
from" rule. As a consequence, as tnony
as eleven mineral processing facilities in
four different commodity pectoi s may
incur compliance COR!S dre to this rnli.
The Agency estimates that lo'nl annual
compliance costs nre not likely to
exceed $15.5 million and (hnro'oro
concludes that today's final rule is nol a
"tnnjor rule" according lo the first
criterion of E.0.122!?l!7
With respect to the other E Q.12291
criteria, the Agency does not predict a
substantial increase in costs or prices
for consumers or a significant effect on
international trade or employment in
connection with today's final nile. Soma
individual mineral proueRsing facilities
in the lightweight aggregate and
titanium dioxide seclois may experience
significant compliance costs which
would affect their abilily to compete in
tl'eir respectix'e commodity seniors. On
balance, however, the Agency concludes
that today's rule does not constitute n
major rule ni defined by P.O. 122.11.
The following paragraphs of this
section briefly restate s!-e Agency's
economic impact sero'imna appnwrh
and assumptions, and f.fuvkJp revised
results,
'A. Approach
"I. Methodology and Asstimpfio«<5
The revised screonmq snaljsjs
prepared for today's firol rule used
essentially the same irethni4fili>ay
employed for and described fn She
September 25,1909, NPRM {54 F8 39.112-
10) snd accompanying l> -rlf.grwjnd
documents, to which the render is
referred for details.
Substantial differences behveim the
scope and results of the nnaljsis
described in the proposed rule and those
reported here primarily reflect a shift in
the Bevill status of several key waste
streams based on new information on
w.isle generation rates and chemical
characteristic/?, »?s described above in
section III. Specifically, the final rale
restores the Bovill status for two wastes
for which the Agency bus previously
estimated compliance coat impacts in
the September 25 NPRM (ro-ist leach ore
residue from chromitc processing and
process waslewater from hydrofluoric
7 Th«s Preamble lo the SfplmnVr ^j, !«<»,
proposed ntlo presented an sniiiinl rmmpl!ani» nwl.
natinwte of $5.2 million for 8 «!T*cl0d hcilitfci !n 5
commodity lector*. The net increase to $18,5 ml!!!or>
in attributable entirely to thr addition of !igli'we Uit of »fTi!nt,«»l
add production), thus obviating the
predicted Impacts for these two sectors.
On the other hand, APC d'jsi/s''jrfga
from lightweight aggregate production
(proposed for retention within t!»«
exclusion based upon preliminary
review of EPA survey datn) has now
be»»n removed from the Bevill ejHiiiion
following a closer examination of Ihr
d:t'\!>, which indicates that average
scrubber solid volumes nre well bnlow
the high volume criterion.
Because EPA waste samnling i'si;i
iind information subnn'tted both in
response to the Agsncy's RCRA section
3007 lotler and in public comment
indicate that APC solids from
lightweight aggregate are unlik"!;, ki
exhibit hazardous waste chcsr.'jctojiiilica,
the Agency believes that removing this
material from the Devill exclusion wMl
not impose any cost or economic
impacts on most of the 30 or so facilities
thiit generate it. Nonetheless, if is well
known that several lightweight
nwgregale production facilities ciirrf-ntly
burn listed hazardous wastes 09 a
primary fuel end would hence
«>.perionce subtitle C regulatory
compliance costs as a consequence ol
(he "d»:rived-from" rule {"?ee 40 CFR
20U-Hb)(2MiJ).
EPA has not substantially modified ils
i's'.imatns of the distribution ynd
of the costs or itnpncls fur- the
four affected waste strums
whose stntus remained unchanged from
the September 25 NPRM (elemental
phosphorus off-gas solids, primary lead
process waslewater, titanium dioxide
sulf.ite process waste acids, and
titanium dioxide sulfate process waste
solids).
Of the five waste streams reviewed
for potential hazard charactei istirs. the
proliminsiry screening assessment
svggesM that two—lightweight
og^re^nte APC scrubber solids and
sutfa'e process waste solids front
titanium dioxide production—are nol
likely to exhibit hazardous
characteristic* under current FCRA
hazardous waste test procedures.
Therefore, EPA has assumed in ils
economic impact screening analysis that
facilities generating these was'cs will
experience no compliance cost impacts
associated with potential subtitle C
regulation of these wastes. The piimwrji
exception relates to five (out of 30)
lightweight aggregate producers that
currently burn listed hazardous was'oa
an fuel. EPA's Information Indicates that
five facilities operated by the Solite
Corporation and one facility operated
by the Norlite Corporation bum
hoznrdous waste as fuel: one of the
Solite facilities apparently dons nol
generate any solid wastes. With fsnv
specific exceptions (based on waste
sampling data), the remaining throe
waste streams ware considered
hazardous at all facilities, for Lhe
characteristics specified, as follow t:
» Elemental phosphorus off-g.is s
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OSWER DIR. No. 9541.00-14
Federal Register / Vol. 55, No. 15 / Tuesday, January 23, 1990 / Rules and Regulations
2313
pollution control (APC) scrubber solids
will face economic impacts due to the
removal of this waste stream from the
Bevill exclusion by today's final rule.
because they burn listed hazardous
waste as fuel. Because this sector was
not e%'aluated in the original screening
analysis for the NPRM, the following
paragraphs present the Agency's costing
approach and engineering design
assumptions for evaluating compliance
options and estimating costs.
In general, there are a ir.ultitude of
possible compliance options available to
lightweight aggregate producers, varying
from conversion to fossil fuels to various
possible waste reduction methods io
possible delisting petition options.
Because of lack of data necessary to
perform quantitative cost estimates for
most of these alternatives (as well as
time constraints on this final court-
ordered rule), the Agency's screening
analysis has been forced to focus only
on the extremely high-cost option of
managing the APC scrubber solids
(generated as wet sludges) as Subtitle C
hazardous wastes. The Agency's cost
estimates are thus based on the
difference in disposal costs between
managing the reported sludge volumes
in unlined impoundments or waste piles
versus disposal in a permitted subtitle C
landfill. For these and other reasons
outlined below, the Agency's cost
estimates for this sector should be
regarded as upper-bound estimates.
The waste quantities potentially
subject to subtitle C landfill disposal
have been estimated using responses to
the industry survey and, in one case,
written public comments. Methods for
developing these estimates are
described in a supplemental technical
background document that may be
found in the docket for today's rule.*
The Agency has assumed that the waste
quantities reported by the facilities
represent relatively dry material and
that dewatering would not be feasible as
a volume reduction method prior to land
disposal. If dewatering would be
possible, then the quantity of waste for
subtitle C landfill disposal has been
overestimated and, to this extent. EPA
has, accordingly overestimated
compliance costs, which are directly
related to the mass of waste that must
be disposed.
The Agency has also conservatively
assumed that all lightweight aggregate
kilns at each affected facility (most
* Addendum to t/i« Technical Bat£ground
Doaaamt: Development aftha Co*! and Economic
impocw of tmpJfSMntias tfit S»vill Mineral
Processing WatUl Criteria. Economic Analyiii
Staff. Offka of Solid Wntt*. USKPA. January 12,
1WO.
facilities operate three to five kilns) do
and will continue to burn listed
hazardous wastes as fuel Consequently,
in this analysis the entire scrubber
solids stream for all facilities is assumed
to be affected by the derived-from rule
and therefore subject to subtitle C. To -
the extent chat some or all facilities do
not burn listed hazardous wastes in all
of their kilns and/or do (or could)
segregate listed and non-listed
(characteristic) hazardous wastes prior
to their use aa fuel, EPA has further
overestimated costs and impacts,
In addition, the Agency has some
concsras about the waste volume data
reported by one of the two affected
firms, the Solite Corporation, Soiite's
facilities report waste generation rates
that are substantially higher than any
other lightweight aggregate producer,
even when corrected for differences in
plant size and production rate. The
waste-to-product ratio calculated by
EPA for Soiite's facilities ranges from 13
percent to more than 25 percent. This is
from two and one half to 230 times the
ratio calculated for the other reporting
facilities generating the same waste.
Nonetheless, the data reported in the
National Survey and used in this
analysis are consistent with information
previously submitted to EPA by the
company. This may or may not be
related to the issue of moisture content
discussed above. It should be noted.
however, that these very high reported
waste generation rates lead directly to
significant compliance cost estimates. If
actual waste generation rates are lower,
actual compliance costs and associated
impacts will be less than those predicted
here.
Another conservative assumption that
the Agency has made in conducting this
analysis is that affected firms would
continue using current air pollution
control methods and. therefore, continue
to generate wet APC scrubber solids.
Nearly one half of the lightweight
aggregate industry currenty uses dry
collection methods, including one of the
facilities operated by Solite that bums
hazardous waste fuel Waste generation
rates using dry collection methods are
generally significantly lower than those
using wet collection methods. In
addition, information submitted to EPA
indicates that at some facilities, the APC
dust is recycled into the lightweight
aggregate kilos from which it is
generated, such that the process docs
not generate any substantial quantity of
solid wastes. To the extent that the
facilities examined in this analysis could
install dry dust collection systems and
recycle the solids rather than continue
to use wet collection systems, costi and
related impacts could be reduced even If
the facilities continued to utilize listed
hazardous wastes as fuel supplements.
Finally, the affected firms. Solite acd
Norlite. could potentially avoid subtitle
C regulation altogether by either (1)
converting entirely to other fuels and
discontinuing use of listed hazardous
wastes as fuel, or (2) having their wiste
streams de-iisted on a site-specific
basis, EPA notes here that Solite has
indicated in its public comments oil the
September 25,1989, and previous
proposed rules that it would not
continue to accept and burn hazardous
waste fuels if the Beviil exemption were
to be removed froTi its wastas. While
the Agency recognizes that this course
of action is a distinct possibility and
perhaps the least cost compliance
alternative, the Agency was not able In
the present screening analysis to
evaluate the available fuel conversion
option due to a lack of factual
information about such factors as
retrofitting costs, thermal value of
currently used hazardous waste fuels,
and the revenues accruing to the two
firms for accepting the hazardous
wastes from individual generators. For
the same reasons, i.e., insufficient data,
it has also not been possible to predict
the outcome of any attempt by the firms
to have the APC scrubber wastes in
question officially delisted (withdrawn
from subtitle C regulation) by the
Agency.
Similarly, while EPA acknowledges
that intermediate alternatives may be
available, such as burning only
characteristic rather than listed
hazardous wastes in at least seme kilns,
currently available information is
insufficient to assess the feasibility or
cost implications of this type of
operational change.
Consequently, EPA's compliance cost
analysis has been conducted using the
best currently available information to
develop what are essentially worst-case
compliance cost estimates for the
lightweight aggregate commodity sector.
To the extent that the affected facilities
can (1) avoid subtitle C regulation by
fuel changes and/or equipment
modifications or successful deiisting
petition!, or (2) employ waste-reduction
technique! to generate lesser quantities
of APC scrubber solids subject to th«
derived-from rule, the costs and impacts
reported here may represent a
substantial overestimate.
B. Aggregate and Sector Compliance
Costa
. The impact screening analysis
projects that eleven facilities in four
different mineral processing commodity
Reproduced from
best available copy.
-------
23SO Federal Register / Vol. 55, No. 15 / Tuesday, January 23, 19W / Rules and Regulations
sectors will be affected directly by
today's final rule. Thirty-Five facilities in
these four sectors are expected to be
unaffected by today's role because they
either (1) do not generate the processing
waste in question, (2) routinely recycle
the material as a proces« input, or (3)
produce a woste thai apparently do««s
not fail standard EPA hazardous waste
test criteria. Another 3LE 4.—SUMMARY OF PRODUCTION, VALUE OF SHIPMENTS, AND COMPUAMCE COSTS
Commodity s«clor '
E,°m*ntil Phosphonw
Fntfro Sector .. ... .. ~... . .
Facilities Evaluated .......~.~ -. „„
FMC— PoceteHo ID
Occidental — ColwnWa TN .
Le»d
Efitfra Sector ............ . ... . ..„.
Facilities Evaluated . . „.
Asarco— East Hotena WT •-
ASMCO— Glovef MO "... „„_ _.,. .
Asgrco—"Orneh« NE * . ..._._.„ ....
Do« Run— Bufck MO .........
Do« Run — Mefcylaneufs MO ««.«.
lightweight Aggregate
Entire Sector • „..
Facilities Evaluated.
Carotin* SolBa— Norwood MC * _
Fitxida Softs — Green Cov« Fi. •
Kantucky Soiite — Brooki KV *
VIrgWa Sofitt— Arvonta VA * _..,....
NortHs— Cohoes NY •
Titanium Dioxide
En8r« Sector.,.,, „.„
Facilitiss Evaluated
Ken*a Oy— Sava^reh G', '
SCM— Sultimoro MO '
Nurolwr o*
pto'tti
producing
commodity
5
2
5
5
30
Q
9
2
Prtttettm * CMT/
YR)
341 950
174 150
122 449
51,701
374 833
374 633
52,169
52,189
52 189
82762
125304
4 140612
911 458
220454
112491
175083
221 S89
181,437
893 878
114286
64422
68.864
Unit vfllus •
(S/MT)
16°8
1688
1C9S
1688
724
72*
72 1
72-1
734
724
724
275
275
2? 5
275
275
275
275
169t
1691
1891
1891
Value of
•hipwnts ($/YR)
5772S6155
293592312
200,713,345
87,278 S68
271 1S2781
271,132781
37.775 038
37,775.038
37 775 038
67141 706
90 695 963
11:1973910
25 QBS 493
6,068,143
3098390
4819,414
6 1 to 373
4,934,174
1 890X82 634
216,134,768
1C2921 317
113.213.4*9
Cofflpllanca costs
<$/YR>
179 OCO
179,000
8,003
173,000
276000
278,000
41,000
0
0
34.WO
201,000
16,206.000
18206000
3,810.000
2518000
2,907,000
4553,000
2,528,000
1 817,0"0
1.817,000
0
1.8»7,000
Costs per
mefo ton
ol proJuct *
($/MT)
0.5
1.0
<0.1
3.3
0.7
0.7
0.9
0.0
0.0
0.4
1,8
39
17.B
18.4
22.4
17.1
20.1
13.8
2.0
15.9
00
30.4
Costd/val'.,*
of
shipments *
(pafcent)
«rO,1
0.1
<0.1
0.2
01
01
0.1
00
0.0
0.1
02
142
64.6
59.5
81 3
K>2
745
50.8
0 1
0.8
00
10
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OSWER DIR. No. 9541.00-14
Federal Register / Vol. 55, No. 15 / Tuesday, January 23, 1990 / Rules and Regulations
2351
TABLE 4.—SUMMARY OF PRODUCTION, VALUE OF SHIPMENTS, AND COMPLIANCE COSTS—Continued
Commodity sector '
Combined total — all four sectors
All Facilities , _ .... .
Affected Facilities Only * _....„...._.
Number of
plants
producing
commodity
49
11
.— — . — ~-
Production « (MTV
YR|
5.751.103
1,415,728
Unit value >
(S/MT)
481
444
Value o(
shipments (S/Yfi)
2,652 885 481
627306964
Compliance ccsts
(S/YH)
1 8 478 000
1 8 478 000
—
Costs par
mewc ton
of product '
-------
yS2 Federal Register / VoL 55, No. 15 /Tuesday. January 23, 1990 / Rules and Regulations
Energy costs are an important
component of production costs for the
lightweight aggregate industry. Kilns are
reported to requke 2.0 to 8,1 million
BTUs of fuel per MT of lightweight
aggregate produced.17 Residual oil (the
fuel used in most kilns) costs
approximately S2.39 per million BTUs in
1988.l* Assuming this fsel cost, the cost
of fuel per MT lightweight aggregate is
at least S4.SQ, and could possibly be as
high as S14.60 (though the higher fuel
consumption rate might apply at plants
cor.figursd to use less expensive fuels).
- It is therefore apparent that energy
costs account for a substantial portion
of the margin between the raw material
cost of clay ($10 per MT) and the price
of finished lightweight aggregate (as low
as S24 per MT). Consequently, facilities
that can, achieve fuel cost savings by
using hazardous wastes as fuel
supplements are lilcely to have a
substantial current cost advantage over
facilities relying solely upon other fuels,
such as oil or coal, especially since they
can generally charge a disposal fee to
waste generators. Compliance costs
associated with today's rule would
reduce this cost advantage, though if a
facility elected to continue using listed
hazardous wastes its total production
costs would rise above industry norms
only to the extent that the incremental
compliance costs exceeded the fuel cost
savings that it currently enjoys.
Alternatively, if the facility elected to
stop using the listed hazardous wastes,
it would (after any necessary
retrofitting} have fuel costa comparable
to the majority of other facilities in the
industry.
In summary and for several reasons.
EPA believes that the lightweight
aggregate producers affected by today's
rule will not suffer the calamitous
economic impacts that might be
" Cohen. S.M. uid T.S. Uwall "Fluid Bed Makes
Lighter Product" Rock Products, July 1968, page 44.
" VS. Department of Energy. Energy Information
Administration. Monthly Energy Hr»itw. Drc«&b*r
1308. Tabl* 9-10.
suggested by the Agency's incremental
cost estimates, even if one assumes that
these upper limit cost impacts will
actually be incurred. First, facilities that
currently bum hazardous waste as fuel
enjoy a potentially significant cost
advantage with respect to their
competitors. This advantage may
mitigate, perhaps to a considerable
extent, the cost impacts of today's rule.
In addition, because of the special
physical characterictics offered by
lightweight aggregate in comparison
with conventional aggregates, affected
producers may have some ability to
pass through compliance costs to local
industrial and public sector markets in
the form of higher prices, though to an
uncertain extent. Finally, high
transportation costs and a widely
dispersed domestic industry suggest that
moderate price increases could be
sustained, at least for lightweight
aggregate applications that require the
low density and high strength offered by
this material.
b. Titanium Dioxldn. Titanium dioxide
is used in pigments for patats and
surface coatings, paper manufachuing,
and plastics. Half of titanium dioxide
production is consumed in pigments,
where its competitive position is strong.
Demand for high-quality paper also
favors titanium dioxide.
The domestic industry supplies most
of the titanium dioxide used in tha U.S.,
with imports exceeding exports by only
a moderate degree. As a result, ti:anium
dioxide is in a relatively strong domestic
market position. Producers using the
sulfate process, however, are in a
minority and account for only one eighth
of domestic production. It is not likely
that the one affected producer could
establish a premium for its product and
would therefore be limited in the extent
to which it could recover cost increases.
2. Effects on Consumer Prices
For several reasons, EPA believes that
this rale will not create any appreciable
changes in consumer prices. The first
and principal reason is the generally low
overall percentage of compliance costs
to product value, which does not exceed
one percent for any affected commodity
except lightweight aggregate. Combined
with this is the fact that not all
producers in these sectors are affected
equally (many domestic competitors are
not affected at all) and that other
domestic or foreign ftompetitors could
fill production shortfalls, either with
identical or substitutable products.
Finally, since all the affected
commodities are primary intermediate
raw material inputs to the production of
other finished products, their relative
contribution to final consumer goods
prices is, in any case, typically quite
small.
3. Foreign Trade Impacts
Trade is substantial in many of the
mineral commodities covered by today's
rule, but is probably only likely to be a
factor with respect to titanium dioxide.
Basic import and export data for the
sectors that generate potentially
hazardous wastes are presented in
Table 5. Import and export figures for
lightweight aggregate (expanded shale)
ate not available, although international
trade is not thought to be a significant
factor for this sector. Because imports of
titanium dioxide are significant, the
ability of the affected domestic producer
to raise prices to recover compliance
costs, is, as discussed above, runner
limited, and there may be a modest
stimulus towards import expansion.
In view of the above, it is unlikely that
the overall trade balance in the
domestic minerals industry will be
significantly affected by today's rule,
though in one sector regulatory cost
impacts may increase already positive
net imports to a small degree.
T*Hte 5.—IMPORTS AND E*PCSTS OP MINERALS, 1987
Commodity
MOOT
Elemental
PflOSpriOruS*
1 mm*) t _ ^
Ugfttwejgm
Aggregate.
Titanium Dioxide.
Commocirty formes)
Pigs and &WB (COPteiTtJ * «_..,_
Qays (an types) • ...
THaniur* OtowJe PigmeiiHi (con-'
MM).
Domestic production
Quantity (MT)
341,950
374,633
> 4,140,642
833,878
VaJm (SOOO)
577 .238
271.153
"113.374
1,890,433
imports
Quantity (MT)
4,483
185,873
34,191
162.739
ViruelSXXJI
8,609
123, 1ST
9.392
236.945
Exports
Quantity (MT)
20.302
10.118
3,023,593
99,731
value (SOOQ)
30,798
11.945
512,964
181.707
Sourc*: Bureau of Mine*. Minerals Yearbook 1987. pp. 61. 94, 221, 223, 25*. 260. 262. 377, 664, 889, 803, and 894.
> Exports include cathode* and sheets.
< Import/export data lor HgMweigM aggregate an unavailatile.
* data reflect figfnweignt aggregate production only.
rt<
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OSWER DIR. No. 9541.00-14
Federal Register / Vol. 55, No, 15 / Tuesday, January 23, 1990 / Rules and Regulations
2353
VIII. Regulatory Flexibility Analysis
The Regulatory Flexibility Act (RFA)
of 1980 (Pub. L 98-354), which amends
the Administrative Procedures Act
requires Federal regulatory agencies to
consider "small entitles" throughout the
regulatory process. The RFA requires, in
section 603, an initial screening analysis
to be performed to determine whether a
substantial number of small entities will
be significantly affected by a regulation.
If so, regulatory alternatives that
eliminate or mitigate the impacts must
be considered.
In the preamble to the September 25
proposed rule, the Agency presented
documentation of and the rules from a
screening analysis to determine the
potential for significant small business
impacts imposed by the proposed
reinterpretation of the Mining Waste
Exclusion (see 54 FR 39316-7). At that
time it was determined that no small
business enterprises would be adversely
affected by the rule, as proposed.
The changes that have occurred in
today's final rule, as distinct from the
September 25,1989, proposal, have
served to reduce the number of
potentially affected sectors while
increasing slightly the number of
potentially affected facilities. Based
upon the revised cost and economic
impact analysis presented above, and
further data collection and analysis by
the Agency, EPA has concluded that
only one small business enterprise,
Norlite Corporation, with approximately
75 employees,1* might be adversely
affected by today's final rule. Therefore,
EPA concludes that just as in the
September 25 proposal, there will not be
a significant adverse impact on a
substantial number of small mineral
processing companies, because among
the affected sectors there is only one
small business that is expected to
experience impacts from today's final
rule.
IX. List of Subjects in 40 CFR 260, 211
and 262
Designated facility, Hazardous waste.
Waste treatment and disposal.
Recycling, Reporting and recordkeeping
requirements. Manifests.
Dated: January 12.1990.
William K. ReUJy.
Administrator.
For the reasons set out in the
preamble, parts 260, 281 and 282 of title
" Sourc*: Dura Miriml Identifier*, Dialog
Information Servian. Inc. 1968.
40 of the Code of Federal Regulations is
amended as follows:
PART 260— HAZARDOUS WASTE
MANAGEMENT SYSTEM: GENERAL.
1. The authority citation for Part 260
continues to read as follows:
Authority: 42 U.S.C. 6905, 8912(a). 6921.
6927, 6930, 3934. 693S, 6937. 6938, 8939, and
6974.
2. Section 260.10 is amended by
revising the definition "designated
facility" to read as follows:
§ 260.10 Definitions.
*****
"Designated facility" means a
hazardous waste treatment, storage, or
disposal facility which (1) has received
a permit (or interim status) in
accordance with the requirements of
parts 270 and 124 of this chapter, (2) has
received a permit (or interim status)
from a State authorized in accordance
with part 271 of this chapter, or (3) is
regulated under § 281.6(c)(2) or subpart
F of part 268 of this chapter, and (4) that
has been designated on the manifest by
the generator pursuant to § 260,20, If a
waste is destined to a facility in an
authorized State which has not yet
obtained authorization to regulate that
particular waste as hazardous, then the
designated facility must be a facility
allowed by the receiving State to accept
such waste.
PART 2S1—IDENTIFICATION AND
LISTING OF HAZARDOUS WASTES
3. The authority citation for Part 261
continues to read as follows:
Authority: 42 U.S.C 6095, S912(a), 6921, and
6922.
4. Section 261.4 is amended by
revising paragraph (b)(7), to read as
follows:
§ 261.4 Exclusion*.
* * * * »
(b) • • •
(7) Solid waste from the extraction,
beneficiation, and processing of ores
and minerals (including coal), including
phosphate rock and overburden from the
mining of uranium on. For purposes of
i 2B1.4(b)(7), beneficiation of ores and
minerals is restricted to the following
activities: Crushing; grinding: washing;
dissolution; crystallization: filtration;
sorting; sizing; drying: sintering;
palletizing; briquetting; calcining to
remove water and/or carbon dioxide;
roasting, autoclaving, and/or
chloririation in preparation for leaching
(except where the roasting (end/cr
autoclaving and/or chlorination)/
leaching sequence produces a final or
intermediate product that does not
undergo further beneficiation or
processing); gravity concentration;
magnetic separation; electrostatic
separation; flotation; ion exchange;
solvent extraction: electrowinning;
precipitation: amalgamation: and heap,
dump, vat tank, and in situ leaching. For
-the purposes of $ 261,4(b)(7], solid waste
from the processing of ores and minerals
will include only the following wastes,
until EPA completes a report to
Congress and a regulatory
determination on their ultimata
regulatory status:
(i) Slag from primary copper
processing;
(ii) Slag from primary lead processing;
(iii) Red and brown muds from
bauxite refining;
(iv) Phosphogypsum from phosphoric
acid production;
(v) Slag from elemental phosphorus
production;
(vi) Gasifier ash from coal
gasification;
(vii) Process wastewater from coal
gasification;
(viii) Calcium sulfate wastewater
treatment plant sludge from primary
copper processing;
(ix) Slag tailings from primary copper
processing;
(x) Fluorogypsum from hydrofluoric
acid production;
(xi) Process wastewater from
hydrofluoric acid production;
(xii) Air pollution control dust/sludge
from iron blast furnaces;
(xiii) Iron blast furnace slag;
(xiv) Treated residue from roasting/
leaching of chrome ore;
(xv) Process wastewatar from primary
magnesium processing by the anhydrous
process;
(xvi) Process wastewater from
phosphoric acid production;
(xvii) Basic oxygen furnace and open
hearth furnace air pollution control
dust/sludge from carbon steel
production;
(xviii) Basic oxygen furnace and open
hearth furnace slag from carbon steel
production;
(xix) Chloride process waste solids
from titanium tetrachloride production;
(xx) Slag from primary zinc
processing.
-------
2354 Federal Register / Vol. 55. No. 15 / Tuesday. January 23. 1990 / Rules and Regulations
PART 262—STANDARDS APPLICABLE 8. Section 262,23 is amended by waste as hazardous, the generator must
TO GENERATORS OF HAZARDOUS adding paragraph (e) to read as follows: assure that the designated facility
WASTE agrees to sign and return the manifest to
§ 262.23 U«* of «h« martfwt. the generator, and that any out-of-stata
5. The authority citation for Part 262 ..... transporter signs and forwards the
continues to read as follows: (e) For shipments of hazardous waste manifest to the designated facility,
to a designated facility in an authorized
Authority: 42 U.S.C. 6908, 6912. 6922.6923. State which has not yet obtained [FR Doc. 90-1102 Filed 1-22-90: 8:45 am]
6S24.8825, and 8937. authorization to regulate that particular WUJNG coos «$«O-M
-------
OSWER DIR. NO. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 72
Modification of F019 Usting
55 FR 5340-5342
February 14, 1990
(Non-HSWA Cluster Vt)
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
TSSulv-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
PART 261 - IDENTIFICATION AND LISTING OF HAZARDOUS WASTE
SUBPART D - LISTS OF HAZARDOUS WASTES
t HAZARDOUS WASTE FROM NON-SPECIFIC SOURCES
revise entry
"F019"
261.31
Industry and EPA hazardous
waste No. Hazardous waste
Hazard
code
F019...
Wastewater treatment sludges from the
chemical conversion coating of aluminum
except from zirconium phosphating in
aluminum can washing when such phosphating
is an exclusive conversion coating process.
(T)
February 14, 1990 - Page 1 of 1
DCL72.9 - 12W91
-------
-------
e
3340
OSWER DIR. No. 9541.00-14
Federal Register / Vol. 53, No. 31 / Wednesday, February 14, 1§90 / Rules and Regulations
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Parts 261 and 302
IFBL-3S80-8I
RIN 20SO-AC78
Hazardous Waste Management
Systems; Identification and Listing of
Hazardous Waste; Reportable Quantity
Adjustment
AGENCY: Environmental Protection
Agency.
ACTION: Final rule.
SUMMARY: The Environmental Protection
Agency (EPA) is today amending the list
of hazardous wastes from non-specific
sources under 40 CFR 261.31 by
modifying the scope of the EPA
Hazardous Waste No. F019. The Agency
is amending the F019 listing to exclude
wastewater treatment sludges from the
zirconium phosphating step, when such
phosphating is an exclusive process in
the aluminum can washing process,
because the Agency believes that such
sludges do not pose a substantial hazard
to human health or ihe environment and
should not be regulated as a listed
hazardous waste. The Agency also is
removing these zirconium phosphating
sludges from the list of hazardous
substances under Pnrt 302.4, This
modification to the F019 listing does not
affect any other wastcwater treatment
sludges from the chemical conversion
coating of aluminum.
DATS: This regulation becomes effective
on February 14,1990.
ADDRESSES: Copies of materials
relevant to this final rulemaking are
located at the RCRA docket at the U.S.
EPA, 401 M Street, SW,, Washington,
DC 20460. The RCRA docket is located
in Room SE 2427 and is open from 9 a.m.
to 4 p.m., Monday through Friday,
excluding holidays; the public must
make an appointment in order to review
materials by calling (202) 475-9327.
Refer to "Docket number F-69-F19P-
FFFFF" when making appointments to
review materials relevant to this
rulemakirig. The public may copy 100
pages from the docket at no charge;
additional copies are $0.15 per page.
FOR FURTHER INFORMATION CONTACT:
The RCRA/CERCLA Hotline at (000}
424-9340 or, in the Washington, DC
area, (202) 382-3000. For technical
information on the RCRA portion of the
rule, contact Ms. Denise A, Wright,
Listing Section, Office of Solid Waste
(OS-333J at (202) 245-3819. For technical
information on the CERCLA portion of
the rule, contact Ms. Ivette Vega,
Response Standards and Criteria
Branch. Emergency Response Division
(OS-210) at (202) 475-7369. Both are
available at U.S. Environmental
Protection Agency, 401 M Street, SW,,
Washington, DC 20460.
SUPPLEMENTARY INFORMATION: The
contents of today's preamble are listed
in the following outline:
1. Background
II. Response to Comments
I!!. Relationship (o Other Regulatory
Authorities
IV. State Authority
A. Applicability of Rules in Authorized
States
B. Effect on State Authorizations
V. Effective Date
VI. Regulatory Impact
VII. Regulatory Flexibility Act
VIII. Paperwork Reduction Act
I. Background
On August 4,1909, EPA proposed to
amend its regulations under RCRA to
modify the scope of the F019 hazardous
waste listing to exclude wastewater
treatment sludges from zirconium
phosphating in aluminum cnn washing
when such phosphating is an exclusive
conversion coating process (54 FR
32320). The Agency proposed to exclude
these wastes because they do not pose a
substantial hazard to human health and
the environment and should not be
regulated.
EPA originally listed wastewater
treatment sludges from the chemical
conversion coating of aluminum as F019
due to its belief that these processes
used complexed cyanides and chromium
and typically resulted in hazardous
sludges. The Agency later learned,
however, that one of the chemical
conversion coating processes—-
zirconium phosphating performed during
the washing of aluminum cans—is not
expected to result in hazardous
wastewater treatment sludges.
After reviewing the process chemistry,
typical conversion coating solutions
used, and analytical data, the Agency
concluded that, although the sludge
currently meets the F019 listing
description, this sludge should not have
been included in the F019 listing
because it is not hazardous. No
hazardous constituents (listed in
appendix VIII of 40 CFR part 281) are
. contained or used in this conversion
coating step, except for hydrofluoric
acid. The zirconium phosphate solution
typically used includes flt'orozirconie
acid (as a source of zirconium), nitric
and hydrofluoric acids, and phosphoric
acid. The hydrofluoric acid, which is
present in the can washing wastewater
in low concentrations that are readily
treated, is chemically converted in the
wastewater treatment process into
calcium fluoride or calcium aluminum
fluoride, which is non-hazardous. Thus,
the slightly alkaline sludge would not be
expected to contain any hazardous
constituents, nor exhibit any of the
characteristics of hazardous waste. The
Agency's review of analytical data on
these wastewater treatment sludges did
not indicate the presence of significant
concentrations of Appendix VIII
constituents. Additionally, the data
showed that these sludges do not exhibit
any hazardous waste characteristics.
The Agency is, therefore, amending the
F019 listing to exclude the wastewater
treatment sludges from the zirconium
phosphating step of the aluminum can
washing process.
This final exclusion applies only to
sludges from processes that exclusively
Use zirconium phosphating solutions
that do not contain chromium or
cyanides. Further, these processes are
not associated with electroplating or
conversion coating steps whore
hazardous constituents are used. For
example, if a can maker employs a
chromating step, separately or in
conjunction with auch zirconium
phosphating, the wastewater treatment
sludges would meet the F019 listing and
would not be excluded under this
rulemaking.
As a result of this final exclusion, two
delisting petitions that have been filed
under 40 CFR 260.20 and 200.22 are
unnecessary, since the wastes described
in the petitions are not the F019 wastes.
The two petition? are #0742 and *0743,
which were filed by Continental Can
Company for their Glendale, Wisconsin
and LaCresse, Wisconsin facilities,
respectively. The Agency intends,
therefore, to take no further action on
these petitions.
II. Response to Comments
EPA received eight comments on the
Agency's proposal to exclude
wastewater treatment sludges from
zirconium phosphating in aluminum rain
washing when suuh phosphating is an
exclusive conversion coating process.
All commenters supported the Agency's
proposal. Two commenters, however,
requested that EPA modify the proposed
wording to exclude other zirconium-
based conversion conting processes. The
commenters claimed that these other
zirconium processes do not contain
hazardous constituents but did not
provide any data to support their
contention that the sludges from these
processes are substantially equivalent
to those covered by today's rule.
As stated in our proposal, the Agency
recognizes lhat there may be other
a-1
Reproduced from
best available copy.
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Federal Register / Vol 55, No, 31 / Wednesday, February 14, 1990 / Rules and Regulations 5341
wastewater treatment sludges from
conversion coating processes falling
within the scope of FOli which may not,
in fact, contain or produce hazardous
constituents. Because EPA does not
have data on such wastes, the Agency
did not propose to exclude them from
the F019 listing. Thus, today's final rula
does not address such wastes.
III. Relationship to Other Regulatory
Authorities
All hazardous wastes listed pursuant
to 40 CFR 261.31 through 261.33, as well
as any solid waste that meets one or
more of the characteristics of a RCRA
hazardous waste (as defined in 40 CFR
261.21 through 261.24), are hazardous
substances as defined at section 101(14)
of the Comprehensive Environmental
Response, Compensation, and Liability
Act (CERCLA) of 1980. The CERCLA
hazardous substances are listed at 40
CFR 302.4 along with their reportable
quantities (RQs). CERCLA section I03(a)
requires that persons in charge of
vessels or facilities from which a
hazardous substance has been released
in a quantity that is equal to or greater
than its RQ shall immediately notify the
National Response Center of the release.
In addition, section 304 of the Superfund
Amendments and Reauthorization Act
of 1988 (SARA) requires the owner or
operator of a facility to report the
release of a hazardous substance or an
extremely hazardous substance to the
appropriate state emergency response
commission (SERC) and to the local
emergency planning committee (LEPC)
when the amount released equals or
exceeds the RQ for the substance, or
one pound when no RQ has been set.
Effective today, the description of
hazardous waste stream F019 in Table
302.4 is amended to exclude wastewater
treatment sludges from zirconium
phosphating in aluminum can washing
when such phosphating is an exclusive
conversion coating process. These
zirconium phosphating sludges are no
longer listed hazardous substances
under CERCLA sections 101(14) and
102(a). Reporting of releases of sludge
from the zirconium phosphating of
aluminum cans process is no longer
required, except as indicated below,
under either section 103 of CERCLA or
section 304 of SARA. Although the
Agency has no reason to believe that
releases of zirconium phosphating
sludges will contain hazardous
constituents subject to reporting under
section 103 of CERCLA or section 304 of
SARA, the Agency reminds the
regulated community that reporting of
releases of such sludges is required if a
hazardous substance (which is
contained as a constituent of the sludge)
is released to the environment above its
RQ. Reporting also is required when the
wastewater treatment sludge meets one
or more of the characteristics of unlisted
hazardous waste for ignitabilily,
corrosivity, reactivity, or EP Toxicity
and 100 pounds or more is released to
the environment (50 FR 13456, April 4,
1985).
The existing 10-pound RQ of waste
stream F019 is not affected by this rule,
except for the exclusion of sludges from
processes that use only zirconium
phosphating. Releases of wastewater
treatment sludges from the chemical
conversion coating of aluminum (other
than from exclusive zirconium
phosphating) remain subject to the
reporting requirements of section 103 of
CERCLA and section 304 of SARA when
a RQ or more is released to the
environment
IV. State Authority
A. Applicability of Rules in Authorized
States
Under section 3008 of RCRA, EPA
may authorize qualified States to
administer and enforce the RCRA
program within the State. (See 40 CFR
part 271 for the standards and
requirements for authorization.)
Following authorization, EPA retains
inspection authority under section 3007
and enforcement authority under
sections 3008, 7003, and 3013 of RCRA,
although authorized States have primary
enforcement responsibility,
Prior to the Hazardous and Solid
Waste Amendments of 1984 (IISWA), a
State with final authorization
administered its hazardous waste
program entirely in lieu of EPA
administering the Federal program in
that State, The Federal requirements no
longer applied in the authorized State,
and EPA could not issue permits for any
facilities in the State which the State
was authorized to permit. When new,
more stringent Federal requirements
were promulgated or enacted, the State
was obliged to enact equivalent
authority within specified time frames.
New Federal requirements did not take
effect in an authorized State until the
State adopted the requirements as State
law.
In contrast, under section 3008(g) of
RCRA. 42 U.S.C. 6926(g), new
requirements and prohibitions imposed
by the Hazardous and Solid Waste
Amendments of 1084 (HSWA) take
effect in authorized States at the same
time that they take effect in non-
authorized States. The rulemaking
promulgated today is not imposed
pursuant to HSWA.
D. Effect on State Authorizations
Today's final rule is not effective in
authorized States since the regulations
are not being imposed pursuant to
HSWA. Thus, the regulation is
applicable only in those States thai do
not have interim or final authorization.
In authorized States, the regulations will
not be applicable until the Stale revises
its program to adopt equivalent
regulations under State law.
40 CFR 271.21(e)(2) requires that
States that have final authorization must
modify their programs to include
equivalent regulations within a year of
promulgation of these regulations if only
regulatory changes are necessary, or
within two years of promulgation if
statutory changes are necessary. These
deadlines can be extended in
exceptional cases (40 CFR 27l.21(e)(3)J.
Once EPA approves the modification,
the State requirements become Subtitle
C RCRA requirements.
It should be noted that authorized
States are only required to modify their
programs when EPA promulgates
Federal regulations that are more
stringent or broader in scope than the
existing Federal regulations. For those
Federal program changes that are less
stringent or reduce the scope of the
Federal program, States are not required
to modify their programs. This is a result
of section 3009 or RCRA, which allows
States to impose regulations in addition
to those in the Federal program. The
regulations promulgated today at 40 CFR
261.31 are considered to be less
stringent or to reduce the scope of the
existing Federal regulations. Therefore,
authorized Stales are not required to
modify their programs to adopt
regulations equivalent or substantially
equivalent to the provisions listed
above.
V. Effective Dale
This rule is effective February 14,
1990. The Hazardous and Solid Waste
Amendments of 1984 amended section
3010 of RCRA to allow rules to become
effective in less than six months when
the regulated community does not need
the six month period to come into
compliance. This is the case here since
this rule reduces, rather than increases,
the existing requirements for persons
generating hazardous wastes. In light of
the unnecessary hardship and expense
which would be imposed on the
regulated community by an effective
dale six months after promulgation and
the fact that such a deadline is not
necessary to uchieve the purpose of
section 3010, this rule is effective
Ftibruary 14.1900, This modification lo
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Federal Register / Vol. 55, No. 31 / Wednesday, February 14, 1990 / Kales ana
the listing is retroactive with regard to
the above described previously
generated zirconium wastes, because
these particular wastes should not have
been included within the scope of the
1980 listing Thus, where this rule
tipplies, EPA does not consider such
wastes, whenever they were generated,
to be F019. EPA's decision, however,
does not affect authorized State
regulation of such waste if a State's
regulation is more stringent or broader
in scope.
VI. Regulatory Impact
Under Executive Order 12291, EPA
must judge whether a regulation is
"major" and therefore subject to the
requirement of a Regulatory Impact
Analysis. This final rule reduces the
regulatory requirements applicable to
the regulated community. It is not major
because it will not result in an effect on
the economy of $100 million or more, nor
will it result in a major increase in costs
or prices to individual industries,
consumers. Federal, State or local
government agencies, or geographic
regions. Finally, there will be no adverse
impact on competition, employment,
investment, productivity, innovation, or
the ability of U.S.-based enterprises to
compete with foreign-based enterprises
in domestic or export markets.
Accordingly, this final amendment is not
a major regulation, and no Regulatory
Impact Analysis has been conducted.
This final amendment was submitted
to the Office of Management and Budget
(OMB) for review as required by
Executive Order 12291.
VII. Regulatory Flexibility Act
Pursuant to the Regulatory Flexibility
Act, S U.S.C. 601-612, whenever an
agency is required to publish a general
notice of rulemaking, for any proposed
or final rule, it must prepare and make
available for public comment a
regulatory flexibility analysis which
describes the impact of the rule on small
entities (i.e.. small businesses, small
organizations, and small governmental
jurisdictions). The Administrator may
certify, however, that the rule will not
have a significant economic impact on a
substantial number of small entities.
This final amendment will not have a
significant economic impact on small
entities since it reduces regulatory
requirements. Accordingly, I certify that
this final rule will not have a significant
economic impact on a substantial
number of small entities. This
regulation, therefore, does not require a
regulatory flexibility analysis.
VIII. Paperwork Reduction Act
This final rule does not contain any
information collection requirements
subject to OMB review under the
Paperwork Reduction Act of 1980,44
U.S.C. 3501 et seq.
List of Subjects
40 CFR Part 261
Hazardous wastes. Recycling.
40 CFR Part 302
Air pollution control. Chemicals,
Hazardous materials, Hazardous
substances, Hazardous wastes.
Intergovernmental relations, Natural
resources, Nuclear materials, Pesticides
and pests, Radioactive materials, and
Recycling.
Dated: February 1.1900.
William K. Reilly,
Administrator.
For the reasons set out in the
preamble, title 40 of the Code of Federal
regulations is amended as follows:
PART 261—IDENTIFICATION AND
LISTING OF HAZARDOUS WASTE
1. The authority citation for part 261
continues to read as follows:
3002 of the Solid Waste Disposal Act. as
amended by the Resource Conservation and
Recovery Act of 1978 (42 U.S.C 6no5.8912(n).
6921 and 6922).
2. Section 261.31 is amended by
revising entry "F019" to read as follows:
f 261.31 Hazardous waste from non-
specific sources.
Industry and EPA
Hazardous Waste
No.
Hazardous Waste
F019 Wastewater treatment (T)
sludges from the
chemical conversion
coating ol aluminum
except trom
zirconium
phoophating in
aluminum can
washing wfien such
phosprattng le an
exclusive conversion
coating process.
PART 302—DESIGNATION,
REPORTABLE QUANTITIES, AND
NOTIFICATION
3. The authority citation for part 302
continues to read as follows:
Authority: Section 102 of the
Comprehensive Environmental Response,
Compensation, and Liability Act of 1980, 42
U.S.C. 9602; sections 311 and 501(a) of the
Federal Water Pollution Control Act. 33
U.S.C. 1321 and 1361.
4. Table 302.4 of \ 302.4 is amended by
revising the description of Hazardous
waste stream F019 under the heading
"Hazardous Substance" to read as
follows:
TABLE 302.4—LIST OF HAZARDOUS SUBSTANCES AND REPORTABLE QUANTITIES
tS-s* footnotes at orwj of Table 302.4]
Statutory
Final RQ
Hazardous Substance
CASRN
Roiiiilatory
Synonyms
RO
Code
RCRA
Waste
Number
Category Pounds (kg)
roi9: Wastewater treatment sludges from the chemical conver-
sion coating of afcjrninurri except from zfrconiurn pnosphating
in aluminum car) washing when such phospnatlnQ ie an exdu*
sive conversion coating proc**r «
[PR Doc. 90-3253 Filed 2-13-90; 8:45 am)
BtLUNQ COM (MO-M-M
U'.V
-------
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OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 73
Testing and Monitoring Activities; Technical Corrections
55 FR 8948-8950
March 9, 1990
(Non-HSWA Cluster VI)
Note: This checklist contains technical corrections to the final rule addressed by Revision
Checklist 67 (54 FR 40260; September 29, 1989). States are encouraged to adopt the corrections
addressed by this present checklist at the same time that the Revision Checklist 67 provisions are
adopted.
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STAT1 ANALOG" IS:"
EQUK^
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
PART 260 - HAZARDOUS WASTE MANAGEMENT SYSTEM: GENERAL
SUBPART B - DEFINITIONS
REFERENCES
add a list of the
47 analytical testing
methods incorporated
by reference
260.11 (a)
PART 261 - IDENTIFICATION AND LISTING OF HAZARDOUS WASTE
APPENDIX III TO PART 261
CHEMICAL ANALYSIS TEST METHODS
revise Footnote "a"
of Table 2
revise Methods 7081
and 7420 in Table 3
revise Footnote "a"
of Table 3
Appendix Ill/Table 2
Appendix Ill/Table 3
Appendix Ill/Table 3
March 9, 1990 - Page 1 of 1
DCL73.9 - 129/91
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8948
OSWER DIR. No. 9541.00-14
Federal Register / Vol. 55, No. 47 / Friday, March 9, 1990 / Rules and Regulations
Special Analyses
As noted in the preceding paragraph,
it hen been determined that these
regulations are not major regulations as
defined in Executive Order 12291.
Therefore, a Regulatory Impact Analysis
is not required. It has also been
determined that section 553(b) of the
Administrative Procedure Act (5 U.S.C.
chapter 5) and the Regulatory Flexibility
Act (5 U.S.C, chapter 8) do not apply to
these regulations and. therefore, a final
Regulatory Flexibility Analysis is not
required. Pursuant to section 780S(f) of
the Internal Revenue Code, a copy of
these regulations have been submitted
to the Administrator of the Small
Business Administration for comment on
their impact on small business.
Drafting Information
The principal author of these final
regulations is Prank Boland, Office of
Assistant Chief Counsel (Passthroughs
and Special Industries), Internal
Revenue Service, However, personnel
from other offices of the Internal
Revenue Service and the Treasury
Department participated in developing
the regulations, both on matters of
substance and style.
List of Subjects
28 CFR 1.0-1 through 1.58-8
Income taxes, Tax liability, Tax rates,
Credits.
Adoption of Amendments to the
Regulations
Accordingly, 26 CFR part 1 is
amended as follows:
PART 1—INCOME TAX
Paragraph 1. The authority for part 1
continues to read in part:
Authority: 28 U.S.C. 7805 * * *
Par. 2, Section 1.40-1 is revised to
read as follows:
§ 1.40-1 Question* ami answers retatfng.
to th* meaning of the term "qualified
mixture" In section «0(bXl).
CM. What is a "qualified mixture"
within the meaning of section 40(b)(l)?
A-l. A "qualified mixture" Is a
mixture of alcohol and gasoline or of
alcohol and special fuel which (1) is sold
by the taxpayer producing such mixture
to any person for use as a fuel, or (2) is
used as a fuel by the taxpayer producing
such mixture.
Q-Z. Must alcohol be present in a
product in order for that product to be
considered a mixture of alcohol and
either gasoline or a special fuel?
A-2, No. A product is considered to be-
a mixture of alcohol and gasoline or of
alcohol and a special fuel if the product
is derived from alcohol and either
gasoline or a special fuel even if the
alcohol is chemically transformed in
producing the product so that the
alcohol is no longer present as a
separate chemical in the final product,
provided that there is no significant loss
in the energy content of the alcohol.
Thus, a product may be considered to be
"mixture of alcohol and gasoline or of
alcohol and a special fuel" within the
meaning of section 40(b)(l)(B) if such
product is produced in a chemical
reaction between alcohol and either
gasoline or a special fuel. Similarly a
product may be considered to be a
"mixture of alcohol and gasoline or of
alcohol and a special fuel" if such
product is produced by blending a
chemical compound derived from
alcohol with either gasoline or a special
fuel.
Thus, for example, a blend of gasoline
and ethyl tertiary butyl ether (ETBE). a
compound derived from ethanol (a ,"
qualified alcohol), in a chemical reaction
in which there is no significant loss in
the energy content of the ethanol, is
considered for purposes of section
40(b)(l)(B) to be a mixture of gasoline
and the ethanol used to produce the
ETBE, even though the ethanol is
chemically transformed in the
production of ETBE and is not present in
the final product.
Fred T. Goldberg, jr.^
Commissioner of Internal Revenue.
Approved: February 23,1990.
Kenneth W. Gideon,
Assistant Secretary of the Treasury.
[FR Doc. 90-5063 Filed 3-6-90; 8:45 amj
BILUNQ COOf 4HO-01-M
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 141
IFRL-3731-7]
National Primary Drinking Water
Regulations; Monitoring Requirements
AGENCY: Environmental Protection
Agency (EPA),
ACTION; Notice of public meeting.
SUMMARY: This notice announces the
time and place for a public meeting to
discuss a framework for standardizing
monitoring requirements for most
drinking water contaminants regulated '
under the Safe Drinking Water Act. This
framework would establish three-, six-,
and nine-year compliance monitoring
cycles and include, at a minimum.
inorganic, synthetic organic, and
radionuclide contaminants.
DATES: EPA will hold a public meeting
to discuss the framework on April 6,
1990. The meeting will run from 9 a.m.
until approximately 12 p.m.
AOORESSes: The meeting will be held at
EPA's Washington Information
Conference Center, room #3 North, 401
M Street SW., Washington, DC 20460.
FOR FURTHER INFORMATION CONTACT:
Al Havinga, (202) 382-5555.
SUPPLEMENTARY INFORMATION: Copies
of the proposed framework and further
information with respect to this notice
are available through (1) the Safe
Drinking Water Hotline, telephone (800)
428-4791 or (202) 382-5533 in Alaska and
the Washington, DC metropolitan area;
or by contacting Al Havinga, Criteria
and Standards Division, Office of
Drinking Water (WH-550D),
Environmental Protection Agency, 401 M
Street SW., Washington, DC 20460,
telephone (202) 382-5558.
Dated: March 2,1990. . ,.
Robert H. Wayland 01,
A cling A ssistant A dministratarfor Water,
[FH Doc. 90-5453 Filed 3-0-80; 8:45 am)
•ILUNa COOl (SM-M-M
40 CFR Parts 260 and 281
[FflL-3731-81
Hazardous Waste Management
System; Testing and Monitoring
Activities
AGENCY: Environmental Protection
Agency (EPA).
ACTION: Technical corrections.
SUMMARY: The Environmental Protection
Agency (EPA) is today making
corrective amendments to a final rule
adopting 47 analytical testing methods
for use in meeting the regulatory
requirements under subtitle C of the
Resource Conservation and Recovery
Act (RCRA), published on September 29,
1989 (54 FR 40260-40269). These new
methods are found in the Third Edition
of 'Test Methods for Evaluating Solid
Waste, Physical/Chemical Methods",
Office of Solid Waste Publications SW-
IMS, and its Revision I. Today's
correction adds a list of the 47 analytical
testing methods to the section of the
regulations that incorporates these
methods by reference, 40 CFR 260.11(a),
This amendment is necessary since
language incorporating these methods
was inadvertently left out of the final
rule. This amendment also corrects
Tables 2 and 3 of Appendix III to 40 CFR
part 281.
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Federal Register / Vol. 55, No. 47 _/_ Friday. March 9, 1990 / Rules and Regulations 8949
EFFECTIVE DATE: This amendment
becomes effective on March 9,1990. The
incorporation by reference of portions of
the publication listed in the regulation is
approved by the Director of the Federal
Register as of March 9,1990.
ADDRESSES: The official record for this
rulemaking (Docket No. F-84-ATMP-
FFFFF) is available for review at the
EPA RCRA Docket, Room M-2427, U.S.
Environmental Protection Agency, 401 M
Street SW., Washington. DC 20460. and
is available for viewing from 9:00 a.m. to
4:00 p.m., Monday through Friday,
excluding Federal holidays. The public
must make an appointment to review
docket materials by calling (202) 475-
9327. The public may copy 100 pages of
material from any one regulatory docket
at no cost; additional copies cost $0.15
per page.
Copies of the Third Edition of SW-846
and its Revision I are available from the
Government Printing Office,
Superintendent of Documents,
Washington, DC 20402, (202) 783-3238.
The document number is 955-001-00000-
1 and the cost is $110.00 for the four-
volume set plus updates. Update
packages are automatically mailed to all
subscribers.
FOR FURTHER INFORMATION CONTACT:
For general information contact the
RCRA Hotline at (800) 424-9346 (toll
free) or (202) 382-3000. For information
on the technical aspects of this rule
contact Charles Sellers, Office of Solid
Waste, 05-331, U.S. Environmental
Protection Agency, 401 M Street SW.,
Washington, DC 20460, (202) 382-4781,
SUPPLEMENTARY INFORMATION!
I. Background and Rationale
On September 29,1989, the Agency
published a Final Rule in the Federal
Register (54 FR 40260-40269), adopting
47 analytical testing methods for use in
meeting regulatory requirements under
subtitle C of the Resource Conservation
and Recovery Act (RCRA). The 47
methods are found in the Third Edition
of SW-846 and its Revision I. AH 47
methods were originally proposed on
October 1,1984 (49 FR 33788-33812).
When methods are adopted, as they
were in the September 1989 notice of
final rulemaking, they are incorporated
by reference in 40 CFR 260.11. While the
final rule did amend 1260.11, no specific
reference was made to the 47 analytical
testing methods, where they were
published, or how to obtain copies.
Therefore, the Agency is amending the
final rule, published on September 29,
1989, by including in J 260.11 a list of the
47 analytical testing methods, a
description of where they are published,
and directions on how to obtain copies.
The Agency is also amending the
footnote to Tables 2 and 3 of Appendix
III of 40 CFR part 261 (54 FR 40266,
40287) to clarify that the 47 analytical
testing methods are found in the Third
Edition of SW-846 and its Revision I.
In addition, Table 3 of Appendix III,
"Sampling And Analysis Methods
Contained in SW-848," has two
typographical errors in the Second
Edition column under "Method No."
Method 7881 (Barium, Furnace AAS)
should be changed to Method 7081, and
Method 7470 (Lead, Flame AAS) should
be changed to Method 7420. The Agency
is amending Table 3 to incorporate the
above changes.
Since this notice involves only
technical corrections and clarification,
no public comment period will be
necessary. Any correspondence
regarding corrections to Appendix III of
part 261 should be sent to Mr. Charles
Sellers at the address shown in the "FOB
FURTHER INFORMATION CONTACT"
section of this notice. Under 5 U.S.C.
553(b)(B), a rule is exempt from notice
and public comment requirements
"when the Agency for good cause finds
(and incorporates the finding and a brief
statement of reasons therefore in the
rules issued) that notice and public
procedures thereon are impracticable,
unnecessary, or contrary to the public
immediately. See 5 U.S.C. 553(d) and 42
U.S.C. 6930(b),
II. Regulatory Impact Analysis
Under Executive Order 12291, EPA
must judge whether a regulation is
"major" and, therefore, subject to the
requirement of a Regulatory Impact
Analysis. Due to the nature of this
regulation (technical correction), the
amendment is not "major"; therefore, no
Regulatory Impact Analysis is required.
Ill, List of Subjects in 40 CFR Parts 260
and 211
Hazardous waste, Reporting and
recordkeeping requirements,
incorporation by reference.
Dated: March 2,1990.
Mary A. Cade,
Acting Assistant Administrator for Solid
Waste and Emergency Response.
For the reasons set out in the
preamble, title 40 of the Code of Federal
Regulations is amended as follows:
PART 260—HAZARDOUS WASTE
MANAGEMENT SYSTEM: GENERAL
1. The authority citation for part 260
continues to read as followsr
Authority: 42 U.S.C. 6905, 8912(a). 6921
through 8927, 8930, 8934,6835, 6937, 6938,
8939, and 6974.
Subpart B—Definitions
2. Section 260.11 is amended by
adding a fifth reference in paragraph (a)
to read as follows:
§280.11 References.
(a)' * '
The following 47 analytical testing
methods are contained in the Third
Edition of "Test Methods for Evaluating
Solid Waste, Physical/Chemical
Methods" EPA Publication SW-846
(November 1986) and its Revision I
(December 1987), which are available
for the cost of $110.00 from the
Government Printing Office,
Superintendent of Documents,
Washington, DC 20402, (202) 783-3238
(document number 955-001-00000-1): *
0010 Modified Method S Sampling Train
0020 Source Assessment Sampling System
(SASS)
0030 Volatile Organic Sampling Train
1320 Multiple Extraction Procedure
1330 Extraction Procedure for Oily Wastes
.3611 Alumina Column Geanup and
Separation of Petroleum Waatei
5040 Protocol for Analysis of Sorbent
Cartridges from Volatile Organic
Sampling Train
6010 Inductively Coupled Plasma Atomic
Emission Spectroscopy
7090 Beryllium (AA, Direct Aspiration) -
7091 Beryllium (AA, Furnace Technique)
7198 Chromium, Hexavalent (Differential
Pulse Polarography)
7210 Copper (AA, Direct Aspiration)
7211 Copper (AA, Furnace Technique)
7380 iron (AA, Direct Aspiration)
7381 Iron (AA, Furnace Technique)
7460 Manganese (AA. Direct Aspiration)
7461 Manganese (AA. Furnace Technique]
7550 Osmium (AA. Direct Aspiration)
7770 Sodium (AA, Direct Aspiration)
7840 Thallium (AA, Direct Aspiration)
7841 Thallium (AA, Furnace Technique)
7910 Vanadium (AA, Direct Aspiration)
7911 Vanadium (AA. Furnace Technique)
7950 Zinc (AA, Direct Aspiration)
7951 Zinc (AA, Furnace Technique)
9022 Total Organic Halides (TOX) by
Neutron Activation Analysis
9035 Sulfate (Colorimettic, Automated,
Chloranilate)
9038 Sulfate (Colorlmelric, Automated,
Methylthymol Blue, AA H)
9038 Sulfate (Turbidimetric)
9060 Total Organic Carbon
9065 Phenolict (Spectrophotometric, Manual
4-AAP with Distillation)
9066* Phenolict (Colorlmelric, Automated
4-AAP with Distillation)
9087 Phenolic* (Spectrophotometric, MBTH
with Distillation)
1 The Agency notts Ihil, for guidance purpoitt,
the Third Edition end lit Rcvliion 1 itipenede the
Second Edition and its Update* I *nd II. However,
for regulatory purposes, the Second Edition ind
Updates I and II remain in effect together with the
V method! of the Third Edition end ill Reviiion 1
cited above. SttS4fK 4O260-W2M). September 29,
1988.
-------
8950
OSWER DIR. No. 9541.00-14
Federal Register / Vol. 55, No, 47 / Friday, March 9, 1990 / Rules and Regulations
9070 Total Recoverable Oil and Grease
• (Gravimetric Separator? Funnel
Extraction)
9071 Oil and Crease Extraction Method for
Sludge Samples
9080 Calion-Exchange Capacity of Soils
(Ammonium Acetate)
9081 Cation-Exchange Capacity of Soils
(Sodium Acetate)
9100 Saturated Hydraulic Conductivity,
Saturated Leachate Conductivity, and
Intrinsic Permeability
9131 Tottl Coliform: Multiple Tube
Fermentation Technique
9132 Total Coliforra: Membrane Filter
Technique
9200 Nitrate
9250 Chloride (Colorimetric, Automated
Ferricyanide AAI)
9231 Chloride {Colorimetric, Automated
Ferricyanide AAH)
9252 Chloride (Titrimetric, Mercuric Nitrate}
9310 Gross Alpha and Gross Beta
9315 Alpha-Emitting Radium Isotopes
9320 Radium-228
*When Method 9066 is used it must be
preceded by the manual distillation specified
in procedure 7.1 of Method 9065. fust prior to
distillation in Method 9065, adjust the sulfuric
odd-preserved sample to pH 4 with 1 + 9
NsOH. After the manual distillation ia
completed, the autosnalyzer manifold is
simplified by connecting the re-sample line
directly to the sampler.
PART 261—IDENTIFICATION AND
LISTING OF HAZARDOUS WASTE
3. The authority citation for part 281
continues to read as follows:
Authority: 42 U.S.C. 6905,6812{a). 6921, and
6922.
Appendix III—Chemical Analysis Test
Methods
4. Footnote "a" of Table 2 is revised
with the following:
• The Third Edition of SW-848 and its
Revision I are available from the Government
Printing Office, Superintendent of Documents,
Washington, DC 20402, (202) 783-3238,
document number 955-001-00000-1.
5, Methods 7081 and 7420 in Table 3
are revised to read as follows:
TABLE 3.—SAMPLING AND ANALYSIS
METHODS CONTAINED IN SW-846
Titta
Barium, Fumac*
AAS
Lead, Flams AAS...
Third miSon
See-
Son
No.
3.3
3.3
Meth-
od
No.
7081
7420
Second
Sec-
tion
No.
7.0
7.0
Meth-
od
No.
7081
7420
6, Footnote "a" of Table 3 is revised
with the following:
* The Third Edition of SW-846 and its
Revision I are available from the Government
Printing Office, Superintendent of Documents,
Washington, DC 20402. (202) 783-3238,
document number 955-001-00000-1.
* # • * *
(FR Doc. 90-5454 Filed 3-8-90; 8:45 amj
BILLING COM I5W-W-M
FEDERAL EMERGENCY
MANAGEMENT AGENCY
44 CFR Part 65
[Docket NO. FEMA-6971]
Changes In Flood Elevation
Determinations
AGENCY: Federal Emergency
Management Agency.
ACTION: Interim rule; correction.
SUMMARY: This document corrects a
Notice of Changes in Flood Elevation
Determinations of modified base (100-
year) flood elevations previously '
published at 54 FR 43179 on October 23,
1989. This correction notice provides a
more accurate representation of the
Flood Insurance Rate Map in effect for
the City of Atlanta, Fulton ud De Kalb
Counties, Georgia.
FOR FURTHER INFORMATION CONTACT:
John L, Matticks, Chief, Risk Studies
Division, Federal Insurance
Administration, Federal Emergency
Management Agency, Washington, DC
20472, (202) 648-2787.
SUPPLEMENTARY INFORMATION: The
Federal Emergency Management
Agency gives notice of the correction to
the Notice of Changes in Flood
Elevation Determinations of modified
base (100-year] flood elevations for
selected locations in the City of Atlanta,
previously published at 54 FR 43179 on
October 23. 1989, in accordance with
section 110 of the Flood Disaster
Protection Act of 1973 (Pub. L 93-234),
87 Stat. 980, which added section 1363 to
the National Flood Insurance Act of
1906 (title XIII of the Housing and Urban
Development Act of 1968 (Pub. L 90-
448)), 42 U.S.C. 4001-4128, and 44 CFR '
part 65.4.
List of Subjects In 44 CFR Part 65
Flood insurance, Floodplains.
PART 65— {AMENDED]
1. The authority citation for part 85
continues to read as follows:
Authority: 42 U.S.C 4001 et teq.,
Reorganization Plan No. 3 of 1978, E.Q. 12127.
J65.4
2. Section 85.4 is amended by adding
in alphabetical sequence new entries to
the table.
Slate and county
Oat* ind name of
location newspaper wrwr* notfc*
w««pub«sr»d
ChM mociriM officer of community
Effective date
Comnuntty No.
ge Fulton and Da City of Atlanta..
Kalb.
Octet** 19, 1969, October
26, 1989. AttMflt* Jouf-
Trw HonortbM Andraw Young, Mayor, City October 23,
of Afenta, 55 Trinity AvtntM SW., ADM- 1089
t«.G*x*l 30335-0325.
135157
Issued: March 1,1990.
Harold T.Dury**,
Administrator, Federal Insurance
Administration.
[FR Doc, 90-5464 Filed 3-440; 8:45 am)
MLUNQ COCK I7t»-0j-*t
-------
-------
OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 74
Toxicity Characteristic Revisions
55 FR 11798-11877
March 29, 1990
as amended on June 29, 1990, at 55 FR 26986-26998
(RCRA Cluster II)
Note: 1) A correction to the preamble of the March 29, 1990 rule was published on August 2,
1990 {55 FR 31387). This notice corrected an implementation timetable and extended the period
of time within which affected small quantity generators must comply with the new modification
requirements. An August 10, 1990 (55 FR 32733) notice corrected the August 2, 1990 notice.
On September 27, 1990, a clarification to the March 29 final rule was published in the Federal
Register (55 FR 39409) regarding four implementation issues. The clarification did not affect the
Federal code addressed by this checklist An interim final rule promulgated on October 5, 1990
(55 FR 40834) did affect the Federal code relevant to the Toxicity Characteristic. A separate
revision checklist (Revision Checklist 80) was developed to address those changes effected by the
interim final rule.
2) Two interim final rules (55 FR 40834; October 5, 1990 and 56 FR 3978; February 1, 1991) '
and a final rule (56 FR 13406; April 2, 1991) extended the compliance date of the Toxicity
Characteristic (TC) rule for certain hydrocarbon recovery and remediation operations. This
extension is addressed by Revision Checklist 80. Because a less stringent requirement than that
imposed by the TC rule is in effect until January 23, 1993, that Revision Checklist is optional.
3) States are strongly encouraged to adopt the Permit Modifications rule (53 FR 37912;
September 28, 1988; Revision Checklist 54) and the "Christmas Tree Rule" (54 FR 9596; March
7, 1989; Revision Checklist 61) to ease implementation of the Toxicity Characteristic Rule and
future waste listings. While both of these rules are optional, they will greatly reduce the
immediate permit burden resulting from the TC rule.
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EBTJlv^
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
PART 261 - IDENTIFICATION AND LISTING OF HAZARDOUS WASTE
SUBPART A - GENERAL
EXCLUSIONS
replace "characteristic
of EP toxicity" with
"Toxicity Characteristic"
replace "characteristic
of EP toxicity" with
"Toxicity Characteristic
solely for arsenic"
261.4{b)(6)(i)
261.4(b)(9)
March 29, 1990 - Page 1 of 6
OCL74.9 - 12/13/91
-------
RCRA REVISION CHECKLIST 74; Toxicity Characteristic Revisions (cont'd)
SPA 9
FEDERAL REQUIREMENT
1 add new paragraph
regulating petroleum-
contaminated media
and debris that fail the
261.24 Toxicity Char-
acteristic test and
are subject to Part 280
corrective action
FEDERAL RCRA CITATION
261.4(b)(10)
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
ESUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
PCS WASTES REGULATED UNDER TOXIC SUBSTANCE CONTROL ACT
exemption for PCB-
containing wastes,
already regulated
under Part 761
(TSCA), that fail the
261.24 Toxicity Char-
acteristic test (D018
through D043 only)
»
261,8
i
SUBPART C - CHARACTERISTICS OF HAZARDOUS WASTE
TOXICITY CHARACTERISTIC
remove "EP" before
"toxicity"; insert "using
the methodology
outlined in Appendix II"
after "after filtering";
change "purposes" to
"purpose"
remove "EP" before
"toxicity"; add D018
through D043 to
Table 1; add new
column with CAS
numbers
261 .24(a)
261.24(b)
March 29, 1990 - Page 2 of 6
DCL74.9 - 12/13/91
-------
DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 74; Toxicity Characteristic Revisions (cont'd)
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANAL55 IS:
EQUIV-
ALENT
MORg
STHINOENT
BROADER
IN SCOPE
TABLE 1.—MAXIMUM CONCENTRATION OF
CONTAMINANTS FOB THE Toxicrrv
CHARACTERISTIC
EPA
HW
NO.'
0004
X05
D018
D008
D019
0020
0021
D022
0007
0023
0024
0025
0026
0018
3C27
0028
0029
0030
10 > 2
3031
Contiminant
Arsenic
Benzene
Camon
tetracnloride.
Cfitordane
ChlorcOenzsne
Chloroform
Cnromsuni
c-Cresol
m-Cresal
p-Cresol
Cresoi *~
24-0
1,4-
OicMoroben-
zene.
1.2-
OicNoroeth-
arm.
1,1-
Oichloroethy-
tene.
2.4-
Oinitrcjtoluefle,
Endnn
HeWactikx (and
CAS No.'
7440-38-2
7440-39-3
71-43-2
7440-43-9
56-23-5
57-74-9
103-90-7
67-66-3
7440-47-3
95-4fl-7
108-39-1
•Qe-44-5
94-75-7
106-46-7
107-06-2
75-35-4
121-14-2
72-2O-8
73-44-3
Regula-
tory
Level
!mg/U
5.0
1000
0.5
1.0
0.5
C.03
1000
6.0
5.0.
* 200.0
• 200.0
' £00.0
« 200.0
10.0
7.5
0.5
0.7
* 0.13
0.02
O.CC8
0032
0033
0034
0008
0013
0009
0014
0035
0038
0037
oosa
0010
0011
0039
0015
0040
C04I
D042
0017
0043
Hcxacniorotoen-
isrm.
Hexacworoeuta-
d:en«.
HexacWoroe in-
ane.
Lead
Undans
Mercury
Metfioxycnlor
Metnyt etnyl
ketone..
Nilroeertzene
Pentraeniora.
pranoi.
Pyndjn*
Selenium ..............
Stver
Tetracfteoeutyt-
9T6.
Toxapnane
Tncfiloroethyl-
2,4.5-
Tncntom--"
phenol
2,4.6-
TnchlorO"
phsnol.
2.4,5-TP (Sitvex),..
Vinyl cWonds
118-T4-1
87-68-3
67-72-1
7439-92-1
58-89-9
7439-97-6
72-43-5
78-93-3
98-95-3
87-86-5
110-86-t
7782-49-2
7440-22-4
127-18-4
SCO t -35-2
79-01-6
95-95-4
88-06-2
93-72-1
75-01-4
»0 '3
0.5
3.0
50
0.4
0.2
10.0
2000
2.0
100.0
1 5.0
1 0
5.0
0-7
0.5
0,5
4COO
2.0
10
0.2
1 Hazardous waste number.
1 GwnicaJ aostfacts some* nun*«r.
* Quanwation limit * greater tfisn tne calculated
requiaWfV l«v«t Td« ouanutauon limit therefot* 6«-
comes ine regulatorf leva).
• || o, TV, and p^>8sot concentralksns cannot be
ddwonnated, am total cresol (0026) concentration
is us«d. Th« regulatory l*vel ol total cresol is ^00
mg/l.
SU8PART D - LISTS OF HAZARDOUS WASTES
GENERAL
replace "EP Toxic
Waste" in the hazard
codes and in the text
following the hazard
codes with Toxieity
Characteristic Waste"
261,30(b)
March 29, 1990 - Page 3 of 6
DCL74.9 - 12/13/91
-------
RCRA REVISION CHECKLIST 74: Toxicity Characteristic Revisions (cont'd)
SPA 9
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
"~ STATE ANAL66 IS:
CoTJK?-
ALiNT
MORE
STRINGENT
BROADER
IN SCOPE
APPENDIX II TO PART 261
METHOD 1311 TOXICITY CHARACTERISTIC LEACHING PROCEDURE (TCLP)
EP toxicity test PRO-
eedures are replaced
by Method 1311
Toxicity Character-
istic Leaching
Procedures (TCLP)
Appendix II
PART 264 - STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS
WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES
SUBPART N - LANDFILLS
DESIGN AND OPERATING REQUIREMENTS
replace "EP Toxicity
Characteristics" with
"Toxicity Character-
istics"; insert "with
EPA Hazardous
Waste Numbers D004
through D017"
after "chapter"
264.301 (e)(1)
PART 265 - INTERIM STATUS STANDARDS FOR OWNERS AND OPERATORS OF
HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES
SUBPART K - SURFACE IMPOUNDMENTS
DESIGN REQUIREMENTS
replace "EP Toxietty
Characteristics" with
"Toxicity Character-
istics"; insert "with EPA
Hazardous Waste
Numbers D004 through
D01 7" after "chapter"
265.221 (d)(1)
March 29, 1990 - Page 4 of 6
OCL74.9 - 12/13/91
ot
-------
OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 74: Toxicity Characteristic Revisions (cont'd)
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
1 STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
SUBPART M - LAND TREATMENT
WASTE ANALYSIS
replace "exceed" with
"equal or exceed";
replace "EP Toxicity
Characteristic"
with "Toxicity
Characteristic"
265.273(a)
PART 268 - LAND DISPOSAL RESTRICTIONS
APPENDIX I TO PART 268
TOXICITY CHARACTERISTIC LEACHING PROCEDURE (TCLP)
replace Appendix with
note stating the TCLP
is located in
Appendix II of
Part 261
Appendix 1
Also see technical corrections to the rule at 55 FR 26986 (June 29, 1990).
2-
Ds*f***i ie»« *Hrt li in** OQ •! QQA (KR CO O£3QQ£*\ rmti/>£* m**Ar\ s\%s*s*rt**iiss% f*t^rrr\s***t\r\r* **% A*tn^*%«4!u 11
Part 261, the Appendix in that notice should be used instead of the one in the March 29, 1990
(55 FR 11798) notice.
As background, the TCLP was originally promulgated in 268, Appendix I, on November 7, 1986
(51 FR 40572; Revision Checklist 34) for use in the Land Disposal Restrictions (LDR) program
to determine whether certain wastes require treatment prior to land disposal and to determine
whether certain treated wastes meet the applicable treatment standards. The TC rule and its
June 29, 1990 modification promulgated a revised TCLP at 261, Appendix II, with modifications
based on the Agency's own research and public comment. This TCLP is to be used in both
the TC and the LDR programs. The objective of the above footnoted revision to 268, Appendix
I, is to assure that the TCLP entered into the code by the November 7, 1986 notice (51 FR
40572; Revision Checklist 34) is removed and replaced by the TCLP entered into the code and
amended by the final rules (55 FR 11798 and 55 FR 26986) addressed by Revision Checklist
74. The actual placement of the TCLP within a State's code is not that important, per se; what
is important is that a State's code contains only the Revision Checklist 74 TCLP. States that
have not yet adopted Revision Checklist 34 (the first of the LDR restrictions) need not make
this particular revision to 268, Appendix I, as they would not yet have entered the original Part
268 TCLP into their code. Also, the change on page 2 of this checklist for 261, Appendix II,
March 29, 1990 - Page 5 of 6
DCL74.9 - 12/13/91
-------
RCRA REVISION CHECKLIST 74: Toxicity Characteristic Revisions (cont'd)
SPA 9
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
assures that they add the Revision Checklist 74 TCLP to their code. However, such States
must be careful when adding the LDR restrictions to their code, i.e., the Revision Checklist 34
TCLP should not be added at that time-rather, the Revision Checklist 74 TCLP should remain
the only TCLP in their code. States using the Consolidated LDR Checklist should be sure to
read Footnote 40 on that checklist regarding this issue.
March 29, 1990 - Page 6 of 6
OCL74.9 - 12/13/91
-------
DIE.-NO. 9541.00-14
Thursday
March 29, 1990
Part II
««~y|»ri« f
Environmental
Protection Agency
40 CFR Part 261 et al. -s ,-,.
-.--•r . ..»«;V.;r.{,
Hazardous Waste Management System;
Identification and Usting of Hazardous
Waste; Toxiclty Characteristics Revisions;
Final Rule
-------
11793 Federal Register / Vol. 55, No. 61 / Thursday, March 29. 1990 / Rules and Regulations
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Parts 261, 264, 265, 268, 271,
and 302
[SWH-FBL-3601-1; EPA/OSW-FH-33-026]
RIM 2050-AA78
Hazardous Waste Management
System; Identification and Listing ef
Hazardous Waste; Toxicity
Characteristics Revisions
AGENCY: Environmental Protection
Agency.
ACTION: Final rule.
Y: On June 13, 1986, the
Environmental Protection Agency (EPA)
proposed to revise the existing toxicity
characteristics, which are used to
identify those wastes defined as
hazardous and which are subject to
regulation under subtitle C of the
Resourcs Conservation and Recovery
Act (RCRA) due to their potential ta
leach significant concentrations of
specific toxic constituents. The proposed
rule was designed to refine and broaden
the scope of the hazardous waste
regulatory program and to fulfill specific
statutory mandates under the
Hazardous and Solid Waste
Amendments of 1984 (HSWA).
EPA is today promulgating the
Toxicity Characteristics (TC). Today's
rule retains many of the features of the
original proposal: It replaces the
Extraction Procedure (EPJ leach test
with the Toxicity Characteristic
Leaching Procedure (TCLP); it adds 25
organic chemicals to the list of toxic
constituents of concern; and it
establishes regulatory levels for these
organic chemicals based on health-
based concentration .thresholds and a
dilution/attenuation factor that was
developed using a subsurface fate and
transport model. In response to
comments received on the proposed rule
and related notices, the final rule
incorporates a number of modifications
in the leaching procedure, the list of
toxicants, the chronic toxicity reference
levels, and the fate and transport model.
The overall effect of today's action
will be to subject additional wastes to
regulatory control under subtitle C of
RCRA, thereby providing for further
protection of human health and the
environment,
DATES: Effective Date: September 25,
1990.
Compliance Dates: Large quantity
generators: September 25, 1990. Small
quantity generators (SQGs): March 29,
1991. Any person that would like to use
the Toxicity Characteristic Leaching
Procedure (TCLP) before the effective
date may do so in order to determine
whether the eight heavy metals and six
pesticides that are currently regulated
under the Extraction Procedure (EP)
Toxicity Characteristic leach at levels of
regulatory concern.
ADDRESSES: The official record for this
rolemaking (Docket Number F-90-TCF-
FFFFF) is located in the EPA RCIA
Docket (Second Floor, Em 2427), U.S.
Environmental Protection Agency, 401M
Street SW., Washington, DC 20460. The
docket is open from 9:00 a.m. to 4:00
p.m., Monday through Friday, excluding
federal holidays. Ths public must make
fin appointment to review docket
materials by calling (202) 475-9327. The
public may copy material at a cost of
$0.15 per page.
FOR FURTHER INFORMATION CONTACT:
For general information about this
rulemakingi contact the RCRA/
Superfund Hotline at (800) 424-9348 (toll
free) or (202) 382-3000 in the
Washington, DC metropolitan area. For
information on specific aspects of this
rule, contact Steve Cochran, Office of
Solid Waste (OS-332), U.S.
Environmental Protection Agency, 4G1M
Street SW., Washington, DC 20480, (202)
475-8551.
SUPPLEMENTARY INFORMATION
Preamble Outline
L Authority
II. Background
A. Definition of Hazardous Waste
B. Existing Extraction Procedure Toxicity
Characteristic
C. The Hazardous and Solid Waste
Amendments of 1984
D. Previous Federal Register Notices
E, Other Notice* Relating to the Proposal
F. Pollution Prevention
G. Summary of Final Rule
Hi Response to Major Comments and
Analysts of Issues
A. General Approach
1. Expanded Use of Hazardous Waste
Characteristics
2. Mismanagement Scenario
a. Extent to Which Scenario is Reasonable
b. Worst-Case Scenario Selection
c. Extent to Which the Mismanagement
Scenario for Wastes Managed in Surface
Impoundments is Appropriate
3. Targeted Risks
4. Accuracy
S. Solvent Override
B. Constituents of Concern
1. Final List of Constituents
2. Toxicants Versus Indicator Parameters
3. Method for Selecting Constituents
4, Specific Organic Constituents
a. Vinyl Chloride
b. Bis(2-chloroethyl) Ether
c. Toxaphena
d. Phenol
e. Pentachlorophenol
5. Specific Inorganic Constituents
a. Silver
b. Chromium
c. Nickel and Thallium
C. Chronic Toxicity Reference Levels
1. Maximum Contaminant Levels
2. Risk-Specific Doses for Carcinogenic
Constituents
3. Apportionment of Health Limits
D. Use of Generic Dilution/Attenuation
Factors (DAFs)
E. Application of a Subsurface Fate and
Transport Model
1. Introduction
a. Juna 13,1886, Proposed Rule (51 FR
21648)
b. August 1,1983, Notice of Data
Availab;li!y and Request for Comments:
Supplement io Proposed Rule (52 FX
28892)
2. Modifications of the Subsurface Fate and
Transport Model (HPASMOD) in
Response to Comments
a. General Modifications
1. Unsaturated Zone
ii. Sourca Characterization
iii. Treatment of Dilution from Recharge
iv. Location of the Receptor Well
v. Dispersivity Values
vi. Hydraulic Conductivity
vii. Hydrolysis
viii. Steady-State Assumption
ix. Biodegradation
x. Summary of General Modifications
b. Use of the EPACML for Surface
Impoundments
3. Newly Acquired Data
a. Landfill Data
b. Chemical-Specific Parameters
4. DAF Evaluation
«. Selection of an Appropriate Percentile
b. Resulting DAFs for Landfills
c. Resulting DAFs for Surface
Impoundments
d. Final DAF Selection
F, Toxicity Characteristic Leachiiif
Procedure {TCLP) {Method 1311)
1. Introduction
2. Adoption in the LDR Rulemaking and
Modification from the Proposed Rule
3. Applicability of TCLP to Solidified
Waste
4. Analytical Methods
C. Testing and Recordkeeping
Requirements
1. Existing Requirements for Generators
2. Changes Considered
H. Applicability to Wastes Managed in
Surface Impoundments
1. Sampling Point
2. Multiple Surface Impoundments
1. Relationship to Other RCRA Regulations
1. Hazardous Waste Identification
Regulations
a. Hazardous Waste Listings
b. "Mixture" and "Derived From" Rules
c. Mixture Rule Exemption
4 Delistlng
2. Land Disposal Restrictions
a. Risk Levels and Frequency Interval
b. Treatment Standards for TC Wastes
c. Schedule for LDR Determinations
3. RCRA Corrective Action and Closure
Requirements
4. Minimum Technology Requirements
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a. Applicability
b. Scope of Minimum Technology
Requirements
1. Permitted Facilities
2. Interim Status Facilities
c. Compliance with Minimum Technology
Requirements
5. RCRA Subtitle D (Solid Wastes)
a. Municipal Waste Combustion Ash
b. Impact on Wastes Excluded from
Subtitle C Regulation
8. RCRA Subtitle I (Underground Storage
Tanks)
a. Scope of tha Underground Storage Tank
Program
b. Deferral for Petroleum-Contaminated
Media and Debris Subject to Pert 280
Corrective Action Requirements
7. RCRA Section 3004(n) Air Regulations
J, Relationship to Other Regulatory
"Authorities
1, Comprehensive Environmental
Response. Compensation, and Liability
Act (CEBCLA)
2. Clean Water Act
a. Conflict with NPDES Effluent Guidelines
and Pretreatment Standards
b. Permit Requirements for Wastewater
Treatment Facilities
c. Sludges from Publicly Owned Treatment
Works (POTW)
3. Safe Drinking Water Act
4. Federal Insecticide. Fungicide, and
Rodenticide Act (FIFRAJ
a. Pesticide Wastes
b. Treated Wood Wastes
5. Food, Drug, and Cosmetic Act (FDCAJ
a. Pood Wastes
b. Pharmaceutical and Cosmetic Wastes
6. Used Oil Recycling Act
7. Toxic Substances Control Act (TSCAJ
(C Implementation Issues
1, Notification
2. Effective Date
3. Permitting
IV. Regulatory Levels
A. List of Constituents
1. Proposed List
2. Constituents for Which Final Regulatory
Levels Are Not Now Being Promulgated
3. Final List of Constituents
a. Organic Constituents
b. Inorganic Constituents '
B. Selection of DAFs
C. Analytical Constraints
D. Final Regulatory Levels
V. Implementation
A. State Authority
1. Applicability of Final Rule in Authorized
States
2. Effect on State Authorization
B. Integration of Today's Final Role with
Existing EPTC
1. Facilities Located in Authorized States
2. Facilities Located in Unauthorized States
C. Notification
D. Permitting
E. Compliance Date
VI. Regulatory Requirements
A. Introduction
B, Regulatory Impact Analysis
1. Executive Order No. 122il
2. Basic Approach
3. Methodology
a. Determination of Affected Wastes and
Facilities
b. Cost Methodology
1. Social Costs
2. Compliance Costs
c. Economic Impact Methodology
d. Benefits Methodology
1. Human Health Risk Reduction
2. Resource Damage Avoided
3. Cleanup Costs Avoided
i. Used Oil Methodology
4. Results
a. Affected Wastes and Facilities
1, Affected Wastes
2. Affected Facilities
3. Sensitivity Analysis of Affected Wastes
and Facilities
b. Cost Results
1, Social Costs and Compliance Costs
2. Sensitivity Analysis of Costs
c. Economic Impact Results
1. Significantly Affected Facilities
2. Effects on Product and Capital Markets
3. Sensitivity Analysis of Economic
Impacts
d. Benefits Results
1. MEI Risk
2. Population Risk
3, Resource Damage
4. Cleanup Costa Avoided
5. Sensitivity Analysis of Benefits
e. Cost Effectiveness
f. Used Oil Results
C. Regulatory Flexibility Analysis
1, Approach
2. Results
D. Response to Comments on RIA for June
13.1986, Proposal
1. Industries Included in the Analysis
2. Estimation of Costs and Economic
Impacts
3. Estimation of Benefits
4. Cost-Benefit Comparisons
S. Snail Business Analysis
E. Paperwork Reduction Act
VII. References
I. Authority
The amendments to the hazardous
waste regulations in 40 CFR parts 281
and 271 are being promulgated under the
authority of sections 1006, 2002(a), 3001,
3002, and 3006 of the Solid Waste
Disposal Act of 1970, as amended by the
Resource Conservation and Recovery
Act of 1976, as amended {42 U.S.C. 6305,
6912(a), 6921, 6922, and 6928). The
amendments to the list of hazardous
substances and reportable quantities in
40 CFR part 302 are being promulgated
under the authority of section 102 of the
Comprehensive Environmental
Response, Compensation, and Liability
Act of 1980 (42 U.S.C. 9602), as
amended, and sections 311 and 501(a) of
the Federal Water Pollution Control Act
(33 U.S.C. 1321 and 1381).
II. Background
A, Definition of Hazardous Waste
Subtitle C of the Resource
Conservation and Recovery Act
(RCRA), as amended, establishes a
federal program for the comprehensive
regulation of hazardous waste. Section
1004(5) of RCRA defines hazardous
waste, among other things, as solid
waste that may ". , . pose a substantial
present or potential hazard to human
health and the environment when
improperly treated, stored, transported,
disposed, or otherwise managed." Under
RCRA Section 3001, EPA is charged with
defining which solid wastes are
hazardous by either identifying the
characteristics of hazardous waste or
listing particular hazardous wastes.
Identifying characteristics of hazardous
waste and Listing hazardous wastes are
distinct and fundamentally different
mechanisms for defining hazardous
wastes.
The hazardous waste characteristics
promulgated by EPA designate broad
classes of wastes which are clearly
hazardous by virtue of an inherent
property. In the May 18,1880 final ruie
(45 FR 3~3084) that instituted EPA's
general framework for identifying
hazardous waste, the Agency
established two basic criteria for
identifying hazardous waste
characteristics: (1) The characteristic
should be capable of being defined in
terms of physical, chemical, or other
properties which cause the waste to
meet the statutory definition of
hazardous waste; and (2) the properties
defining the characteristic must be
measurable by standardized and
available testing protocols or
reasonably detected by generators
through their knowledge of the waste (40
CFR 281.10). fa the May 13,1980 final
rule. EPA stated that it adopted the
second criterion in recognition that the
primary responsibility for determining
whether wastes exhibit hazardous
characteristics rests with generators, for
whom standardization and availability
of testing protocols are essential.
The approach EPA uses to establish
hazardous waste characteristics is to.
• determine which properties of a waste
would result in harm to human health or
the environment if a waste is
mismanaged. The Agency then
establishes test methods and regulatory
levels for each characteristic property;
solid waste that exceeds the regulatory
level for any characteristic property is a
hazardous waste.
The regulatory levels for
characteristics that have been
established provide a high degree of
certainty that wastes exceeding those
regulatory levels would pose hazards to
human health and the environment if
improperly managed and therefore
require regulation under subtitle C.
Wastes that do not exhibit hazardous
waste characteristics are not necessarily
nonhszardous. The Agency may
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11800 Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations
evaluate wastes from either specific or
nonspecific sources and decide to list
them as hazardous wastes based on
criteria defined in 40 CFR 281.11.
To list a waste as hazardous, EPA
conducts a detailed industry or process
study involving literature reviews,
engineering analyses, surveys and
questionnaires, site visits, and waste
sampling. For listing, the Agency places
particular emphasis on hazardous
constituents contained in specific
wastes generated by the industry or
process being studied (See 40 CFR
261.11(aJ(3)). However, EPA uses a
comparatively flexible approach when
•deciding to list wastes as hazardous; the
•approach includes consideration of
factors such as type of threat posed,
plausible ways that the waste might be
mismanaged, migration potential and
persistence in the environment, wasta
quantity, and actions of other regulatory
programs. The Agency also promulgated
two other rules for identifying solid
wastes as hazardous wastes — the
mixture and derived-from rules. The
mixture rule says that any mixture of a
listed hazardous waste and a solid
waste is the listed hazardous waste (40
CFR 261.3(a)(2)(iiiHiv)); the derived-
from rule says that any solid waste
derived from the treatment, storage, or
disposal of a listed hazardous waste is
considered the listed hazardous waste
(40 CFR 261 J
B. Existing Extraction Procedure
Toxicity Characteristic
The Extraction Procedure (EP) toxicity
characteristic is one of four existing
hazardous waste characteristics (along
with ignitability, corrosivity, and
reactivity) that EPA has identified and
promulgated (40 CFR 261.24). The
Extraction Procedure Toxicity
Characteristic (EPTC) defines the
toxicity of a waste by measuring the
potential for the toxic constituents in the
waste not subject to subtitle C controls
to leach out and contaminate ground
water at levels of health or
environmental concern. To determine if
a waste exhibits the EPTC, constituents
are extracted in a procedure that
simulates the leaching action that occurs
in municipal landfills. Because a
"hazardous waste" is defined as a waste
that may pose a substantial hazard
"when mismanaged," the EP was
designed based on the assumption that
wastes not subject to subtitle C controls
would be co-disposed with municipal
waste in an actively decomposing
landfill that overlies an aquifer. Thus,
the EP identifies wastes that are likely
to leach hazardous concentrations of
particular toxic constituents to ground
water under conditions of improper
management.
The Agency recognized that not all
wastes are managed according to the
mismanagement scenario postulated for
the EP. However, it is necessary to make
assumptions about management
practices for unregulated wastes in
order to determine whether a waste
poses a threat to human health and the
environment and thus meets the
statutory definition of hazardous waste.
In addition, the Agency believed that a
reasonably conservative
mismanagement scenario was
warranted in light of the statutory
mandate to protect human health and
the environment.
Under the existing EPTC, the liquid
waste extract obtained from the EP is
analyzed to determine whether It
possesses any of 14 toxic contaminants
that were identified in the National
Interim Primary Drinking Water
Standards (NIPDWS): eight metals
(arsenic, barium, cadmium, chromium,
lead, mercury, selenium, and silver), four
insecticides (endrin, lindane,
methoxychlor, and toxaphene), and two
herbicides (2,4-D and 2,4,5-TP).
NIPDWS levels are used as health-
based concentration limits. At the time
of promulgation of the EPTC, the
NIPDWS were the only available
benchmarks for toxicity that were
scientifically recognized and that also
addressed chronic exposure.
The regulatory levels established for
the EPTC were 100 times the NIPDWS.
The 100-fold factor is a dilution and
attenuation factor (DAF) that estimates
the dilution and attenuation of the toxic
constituents in a waste as they travel
through the subsurface from the point of
leachate generation (i.e., the landfill) to
the point of human or environmental
exposure (i.e., at a drinking-water well).
The Agency had originally proposed a
DAF of 10 for use in the EP. In .light of
the fact that there were few empirical
data on which to base the DAF and
other considerations, the Agency
adopted a DAF of 100 in the final rule
(45 FR 33084, May 19,1980). EPA was
confident that any waste which
exhibited the EPTC using the 100-fold
factor would have the potential to
present a substantial hazard regardless
of the actual site-specific attenuation
mechanisms. The Agency also noted
that it would adjust the DAF if future
studies indicated that another DAF was
more appropriate.
C, The Hazardous and Solid Waste
Amendments of 1984
On November 8,1984, the Hazardous
and Solid Waste Amendments of 1984
(HSWA) were enacted: these
amendments have had far-reaching
ramifications for EPA's hazardous waste (
regulatory program. RCRA sections 3001
(g) and (h), which were among the many
provisions added by HSWA, direct EPA
to examine and revise the EP Toxicity
Characteristic and to identify additional
hazardous waste characteristics,
including measures of toxicity. Today's
rule fulfills these mandates by
promulgating an improved leaching
procedure that better predicts leaching
and an expansion of the Toxicity
Characteristics (TC) list to include
additional toxicants.
RCRA section 3001 (g) specifically
directs EPA to examine the EP leach
procedure as a predictor of the teaching
potential of waste and to make changes
necessary to ensure that it accurately
predicts the leaching potential of wastes
that may pose a threat to human health
and the environment when mismanaged.
The legislative history for this provision
indicates that Congress was specifically
concerned about the EP's ability to
accurately represent the mobility of
toxicants under a wide variety of
conditions. The legislative history also
suggests that Congress intended for EPA
to develop a more aggressive leaching
medium for the test and noted that the
EP only evaluated the mobility of
elemental toxicants and not the mobility
of organic toxicants.
Concerned that some wastes posing a
threat to human health and the
environment were not being brought into
the hazardous waste system. Congress
adopted RCRA section 3001(h). which
directs EPA to promulgate additional
characteristics. Of specific concern to
Congress was the fact that the existing
characteristics did not identify wastes
that were hazardous due to toxic levels
of organic constituents. Although
Congress recognized that the
development of such a characteristic
would entail technical problems.
Congress urged the Agency to make
reasonable assumptions for purposes of
regulation, rather than await definitive
technical answers. In response to the
3001(g) and 3001(h) mandates, EPA
issued a proposed rule to revise and
expand the TC (51 FR 21648, June 13,
1988) which is discussed below in
Section H.D.
D. Previous Federal Register Notices
As indicated above, EPA published a
Federal Register notice (June 13,1986)
proposing to expand the existing TC.
The proposal specifically identified 52
compounds that could cause a waste to
be hazardous via toxicity, including the
existing 14 EPTC compounds and 38
additional organic compounds. In
Ot-
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11201
addition, it described the Toxicity
Characteristic Leaching Procedure
(TCLP), a new version of the EP. The
TCLP is designed to more accurately
address the leaching of organic
compounds and to improve upon
technical aspects of the testing protocol.
The June 13 proposal used a
subsurface fate and transport model to
determine compound-specific dilution
and attenuation factors (DATs) as a
basis for establishing the regulatory
levels. (As mentioned above, the
existing TC used a generic DAF of ICO
which was not derived from modeling,
but rather was an estimated factor
indicating the potential for substantial
hazard.) The extract frcrn the second-
generation extraction procedure, the
TCLP, was analyzed for the presence of
the 52 constituents at the proposed
regulatory levels. In choosing the 38 new
toxicants, the Agency identified those
Appendix VIII constituents for which
appropriate chronic toxidty reference
levels were available and for which
there existed adequate fate and
transport data to establish a compound-
specific DAF. (Appendix VIII of 40 CFR
part 261 is the list of hazardous
constituents that the Agency considers
in evaluating the potential hazard posed
by wastes; these constituents have been
shown to have toxic, carcinogenic,
mutagenic, or teratogenic effects.)
Chronic toxicity reference levels are
those levels below which chronic
exposure for individual toxicants in
drinking water is considered safe or
considered to pose minimal risk (in the
case of carcinogens). The Agency
decided to use, when possible, human
health criteria and standards that have
been proposed or promulgated for
substances in particular media, because
these have already received Agency and
public review and evaluation. EPA
proposed-the continued use of the
Drinking Water Standards (DWS) for
the 14 existing EP toxicants and use of
Recommended Maximum Contaminant
Levels (RMCLs) for eight of the
constituents being added to the TC list
For the remaining newly added
constituents, EPA proposed to establish
chronic toxicity reference levels using
Reference Doses (RfDs) for non-
carcinogens and Risk-Specific Doses
(RSDs) for carcinogens.
The RfD is an estimate of the daily
dose of a substance that will result in no
adverse effect even after a lifetime of
exposure to the substance at that dose.
In order to account for toxicant
exposure from sources other than water
(i.e., air and food), the Agenay proposed
to apportion the RfD based on
proportionate compound-specific
exposure routes, as is done in
developing drinking water standards.
The RSD is the daily dose of a
carcinogen over a lifetime that will
result in an incidence of cancer equal to
a specific risk level. EPA proposed a
weight-of-evidence approach, which
involves categorizing carcinogens
according to the quality and adequacy
of the supporting lexicological studies,
to establish the risk levels most
appropriate for setting chronic toxicity
reference levels for carcinogens. •
The Agency proposed using a
subsurface fate and transport model to
calculate constituent-specific DAFs,
This model incorporated compound-
specific hydrolysis and soil adsorption
data, coupled with parameters
describing an underground environment
(e.g., ground water flow rate, soil
porosity, ground water pH). Values for
parameters were selected based on
review of geological conditions at
existing landfills. Since the model was
specifically developed to simulate
transport of organics and a model for
inorganics could not be completed in
time for the Jane 13 proposal. EPA
proposed to retain the existing EP levels
for the eight inorganic toxicants.
Tlie proposed rule introduced the
TCLP as a second-generation leaching
procedure to replace the existing EP.
The main impetus behind the
development of the TCLP was the need
to address the leaching of organic
compounds. However, the Agency also
recognized that the EP protocol could be
unproved in certain ways. The TCLP
was described in detail as a proposed
revision to Appendix II of part 281.
Further supporting information on the
TCLP tvas provided through notices of
availability of reports on July 9,1908 [51
FR 24856} and September 19.1388 (51 FR
33297). After the TC proposal, the Land
Disposal Restrictions final rule (51 FR
40572, November 7,1988) promulgated
the TCLP for monitoring compliance
with treatment standards for certain
spent solvent wastes and dioxin-
cor.taminated wastes. See Section II.E
below for further discussion of these
notices.
E. Other Notices Relating to tlm
Proposal
Today's rule is based on three
fundamental analytic components that
were set forth in the original June 13
proposal: a set of chronic toxicity
reference levels, a subsurface fate and
transport model, and the TCLP. in
addition to the June 13,1986 proposed
rule described in the preceding section
of this oreamble, EPA has published
several other notices in the Federal
Register dealing with these three
components. These notices are iis<«d in
Table 11.1 and are summarized in this
section. A more detailed discussion is
presented on several of these notices in
other sections of this pre-amble, a*
identified in Table II.1.
TABLE IL1—RELATED FEDERAL REGISTER NOTICES DISCUSSING ONE OR MORE OF THE ANALYTICAL COMPONENTS OF THE REVISED
TC
Jan. 14. 1986. St FR 1602 (Proposed LOR framework)-... .
Nov. 7, t986, 51 FR 40572 (Final LDR approach) _. ...
May 18. 1987, 52 FR 18583 (Consideration <* separata wastewatar TC)
May 19. 1988, 53 FR 18024 (CTRU updated, two-tiered DAF alternative
proposed).
May 24, 1988, 53 FR 18792 (Proposal to replace panicle reduction) i
Aug. 1 1968 S3 FR 23892 (Proposed modifications to ground water
model).
CTRU1
._.
Analytic Component
Modal'
X
X
X
x
TCLP*
X
X
X
X
Rstevanl presmow
section of tcoays iwe
me. IB.I
HI.F
IIIA III.H
me, ui.t>
llf.p
ill.E
' Chronic Taxicity Reference Levels.
* Ground water tew and transport model.
* Toxicity Characteristic Leaching Procedure,
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11802 Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations
EPA's first discussion of the
development of regulatory levels
through the use of chronic toxicity
> reference levels in combination with a
subsurface fate and transport model
was in the proposed rule governing land
disposal restrictions for solvents and
dioxins {51 FR 1602, January 14,1986).
This proposal introduced the concept
involved in "back-calculating"
regulatory levels (i.e., multiplying
chronic toxicity reference levels by
dilution/ attenuation factors) and also
discussed the Agency's plan for revising
the EP. In the final rule on land disposal
restrictions for solvents and dioxins (51
FR 40572, November ~, 1988), EPA
decided not to use the "back-calculation
approach" for the LDR program in favor
of an engineering determination based
on the best demonstrated available
technology (BDAT), However, the
Agency did promulgate the revised
TCLP as the leaching procedure to be
used in the land disposal restrictions
program. Specifically, the TCLP is used
to demonstrate that certain wastes meet
the best demonstrated available
technology standards, '
On May 18,1987. EPA published a
Supplemental Notice of Proposed
Rulemaking (52 FR 18583) in response to
numerous comments on the June 1986
proposal concerning the application of
the revised TC to wastewaters. The
commenters' main concern was that it
may be inappropriate to apply the TC
mismanagement scenario (co-disposal of
wastes with municipal wastes in an
unlined landfill) to wastewaters
managed in surface impoundments. The
commenters believe that such an
approach would result in
inappropriately low regulatory levels.
The Supplemental Notice outlined
several alternatives for the application
of the TC to wastewaters that would
result in a separate set of regulatory,
levels for these wastes. The alternative
scenario for wastewaters assumed that
subject wastes are managed in an
unlined impoundment instead of being
co-disposed in a municipal landfill.
Sections III.A.2, III.E., and IH.H provide
further discussion of the Supplemental
Notice for wastewaters and related
issues.
The Agency then published a Notice
of Data Availability and Request for
Comments on May li, 1988 (53 FR
18024), as a result of its concern about
uncertainties and technical difficulties .
involved with developing sufficiently
representative dilution/attenuation
factors (DAFs) for specific constituents.
In that notice, the Agency proposed an
alternative to the constituent-specific
DAFs in the proposed TC. The Agency
presented a two-phased approach to
implementing DAFs for the TC. In the
first phase, the Agency would use
generic DAFs for all 38 new TC organic
constituents while the development of
constituent-specific DAFs proceeded;
once the development of the constituent-
specific DAFs was completed, these
DAFs would be implemented in the
second phase. The Agency specifically
requested comment on the use of a
generic DAF that would initially bring
into the hazardous waste regulatory
system the most toxic of the wastes
subject to the June 1986 proposal, The
Agency also updated the chronic
toxicity reference levels for a number of
constituents based on newly available
information. Section III.C discusses the
incorporation of the new information
into the chronic toxicity reference levels
for specific constituents and Section
IIJ.D describes in more detail the two-
tiered DAF approach.
lit response to numerous comments
expressing concern as to whether the
particle reduction requirement in the
TCLP was appropriate, EPA published a
proposal (53 FR 18792, May 24,1988)
requesting comment on modifications to
the TCLP as promulgated on November
7,1986. Based on further experimental
evaluation of the original testing
methodology, the Agency proposed to
modify the TCLP to include a cage insert
requirement in place of the particle
reduction step for certain materials. The
specific revisions discussed in the
proposal are presented in detail in
section 1II.F of this preamble, and the
TCLP protocol is presented in Section
VIII of today's final rule. Today's rule
does not include a cage requirement but
rather retains the particle reduction step
for monolithic or fixated wastes.
In addition to the above-mentioned
modifications, on August 1.1988, the
Agency published a Supplemental
Notice (53 FR 28892) Introducing.
potential modifications to the
subsurface fate and transport model
used to calculate constituent-specific
DAFs in the proposed TC. In addition,
the Agency presented currently
available hydrogeological data on
municipal waste landfills and proposed
to modify the subsurface fate and
transport model to more accurately
reflect conditions in the universe of
municipal waste landfills. Section III.E
presents a more detailed description of
the subsurface fate and transport model
and the modifications made during its
development
F. Pollution Prevention
In section 1003(b) of RCRA, Congress
declared waste minimization to be a
national policy. Similarly, EPA has
made pollution prevention an Agency
objective, in both regulatory and
nonregulatory programs. (See EPA's
policy statement emphasizing the
importance of pollution prevention (54
FR 3845, January 28,1989).) This policy
places highest priority on source
reduction (i.e., reducing the volume or
toxicity of wastes generated) and use of
all pollutants for all sectors of society. A
reduction in the amount of waste which
must be managed (i.e., by source
reduction and recycling) provides direct
benefits related to protecting human
health and the environment from the
mismanagement of hazardous wastes.
Pollution prevention measures can also
reduce waste treatment and disposal
costs, decrease costs for raw materials,
minimize liability and regulatory
burdens for waste generators, and may
enhance efficiency, product quality, and
public image. The Agency encourages
industries affected by this rule to
consider achieving compliance through
pollution prevention.
The Agency has taken several steps to
create pollution prevention incentives,
First, EPA is developing institutional
structures within each of its offices to
ensure that the pollution prevention
philosophy is incorporated into every
feasible aspect of internal EPA planning
and decision-making.- Second, EPA is
making technical information available
to help firms reduce waste generation.
EPA is developing the Pollution
Prevention Information Clearinghouse
(PPIC), a network of people and
resources throughout the United States
that have direct experience in many
industries. PPIC includes the Electronic
Information Exchange System (EIES),
and a database of bulletins, programs,
contacts, and reports related to pollution
prevention. Third, the Agency is
supporting the development of state
programs to assist generators in their
waste reduction efforts. Many states are
already providing such help. For
example, the Alaska Health Project has
published technical assistance packets
for specific industries; North Carolina
has a pollution prevention bibliography;
and Oregon conducts a hazardous waste
reduction program. Finally, EPA has
initiated specific regulatory
requirements addressing waste
minimization. Under the Resource
Conservation and Recovery Act (RCRA)
regulations, hazardous waste generators
are required to certify on their
hazardous waste manifests and annual
permit reports that they have a program
in place to reduce the volume or
quantity and toxicity of their hazardous
wastes as much as economically
practical, RCRA regulations also require
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11803
generators to describe on their RCRA
biennial reports the efforts they have
undertaken during the year to reduce the.
volume and toxicity of their hazardous
waste and to compare these efforts to
previous years,
As important as the efforts just
described is the Agency's commitment
to ensuring that regulations under
development encourage pollution
prevention, whenever possible. The TC
(TC), we believe, provides significant
incentives for pollution prevention.
Currently, there is little incentive for
industries to implement pollution
prevention efforts for unregulated solid
wastes. In particular, there are few
controls on units handling solid wastes
that have the potential for releases of
hazardous constituents to ground'vater. •
Large quantities of solid wastes
containing TC constituents currently are
managed in unregulated land-based
units, such as surface impoundments
and landfills. Many of these units are in
states that are either highly dependent
on groundwater for public water supply
or where grcundwater is hydraulically
connected to surface water, or both. By
subjecting management of TC wastes to
subtitle C regulation, EPA is in effect
requiring that waste managers rethink
their practices for solid wastes that
contain hazardous constituents. EPA's
experience has been that hazardous
waste regulations provide significant
incentives for pollution prevention. For
example, some listed wastestreams (e.g.,
bottoms from tetrachloroethylene
production) are now completely
recycled.
The characteristic mechanism used by
EPA to identify hazardous waste is
especially effective in encouraging
pollution prevention because it sets a
concentration level or criteria (e.g. test)
that determines the point at which the
waste is no longer regulated as
characteristically hazardous. Because of
the high cost of compliance with RCRA
subtitle C requirements, members of the
rsgulated community will have
significant new incentives to reduce TC
waste generation as a result of today's
rule. Industries will consider substitutes
for the specific chemicals on the TC list
of toxicants of concern. Where
substitutes are not used, there will be
incentive to reduce the use of hazardous
substances or otherwise limit their
concentrations in wastes, in order to
keep concentrations of hazardous
chemicals below regulatory levels.
Pollution prevention options range
from simple good housekeeping
practices, e.g., keeping solvents and oils
separate to facilitate racycling of each,
to more extensive process
reconfigurations and/or raw material
substitutions. Even in cases where •
pollution prevention can not eliminate
the need for treatment or disposal of
hazardous wastes, it may reduce the
generation of waste. For example, tank
capacity is constrained by land area,
engineering considerations, and cost.
Managers of TC wastewaten that
-switch from surface impoundments to
exempt tanks will almost certainly have
to reduce volumes of hazardous waste
generated, or segregate hazardous
portions of their wastestreams.
In order to enhance the pollution
preventions effects of this rule. EPA is
incorporating pollution prevention into
the communication strategy for the TC
regulation. EPA will provide information
targeted to small businesses specifically
and industry in general through
pamphlets, industry publications and
conferences, on the mechanisms
described above. We have found that
many small businesses are turning to
pollution prevention as a result of
implementation of the small quantity
generator regulations (see 51FR10146,
March 24,1986). For example, PPIC
documents relate how one drycleaning
operation reduced its solvent wastes to
a level well below national industry
standards by regularly checking for and
sealing any system leaks, and installing
a conditioning system and a carbon
adsorption unit to recover additional
solvent. With the new setup, the plant
can clean four times as many clothes per
drum of solvent. The Agency believes
that other industries may have the
potential to substitute less toxic source
materials in their processes. EPA will
consider whether any technical
assistance could aid industry in these
efforts. EPA would also be interested in
suggestions from industries affected by
the TC in ways that the Agency might
facilitate these efforts. Inquiries should
be directed to the Pollution Prevention
Office, U.S. EPA, Washington, DC 20450.
In summary, the TC will alter the
management of wastes that contain
toxicant at hazardous levels by ending
management in unregulated land-based
units. As industries reassess their waste
generation and management practices,
many are likely to seriously consider
pollution prevention options, and EPA
will take steps to facilitate such efforts.
G. Summary of Final Rule
Today's rule retains many of the
features of the June 1988 proposal: it
replaces the EP with the TCLP; it adds
25 new organic constituents to the list of
toxic constituents of concern; and it
establishes regulatory levels for the
organic constituents based on health-
based concentration limits and a DAF
developed using the subsurface fate and
transport model. In response to
comments received on the proposed rule
and related notices, the final rule
incorporates a number of modifications
to the list of constituents, the leaching
procedure, the chronic toxicity reference
levels, the subsurface fate and transport
model, and the schedule for compliance
with the TC rule.
.With respect to the list of
constituents, the final rule includes 25 of
the 38 constituents proposed in 1986.
One group that has been excluded in the
final rule are constituents that
appreciably hydrolyze. EPA has been
able to develop scientifically valid DAFs
for nondegrading constituents but is still
improving its approach for developing
DAFs for constituents that are expected
to hydrolyze appreciably during
transport. In particular, the Agency does
not yet have a procedure to address
taxic hydrolysis byproducts that may be
formed.
Second, in response to comments, the
Agency has also evaluated the
applicability of the steady-state
condition assumed in the subsurface
fate and transport model, and has
determined that the assumption is valid
for most of the originally proposed
constituents. However, several of the
original proposed constituents have
been deferred from the final rule while
the Agency continues to evaluate the
extent to which the steady-state solution
is appropriate in determining their fate
and transport.
As a result, all the constituents newly
regulated under today's rule are
nonhydrolyzing or minimally
hydrolyzing constituents, and all are
constituents for which the steady-state
solution is appropriate. For all these
constituents, EPA has determined,
based on the results of its subsurface
fate and transport model, that use of a
DAF of ICO is appropriate for setting
regulatory levels. This DAF is sufficient
to capture only those wastes that are
clearly hazardous. As a result of the
Agency's decision to regulate only
nonhydrolyzing or minimally
hydrolyzing constituents and those for
which the steady-state solution is
appropriate, 25 additional constituents
are being regulated rather than the
originally proposed 38. Regulatory levels
for hydrolyzing constituents, as well as
those constituents for which there
remain questions as to whether the
steady-state solution is appropriate, will
be discussed in future notices.
The list of constituents regulated in
today's rule and their respective
regulatory levels are presented in Table
II.2. As in the proposed rule, where the
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11804 Federal Register / Vol. 55. No. 61 / Thursday. March 29. 1990 / Rules and Regulations
calculated regulatory level (i.e., the
chronic toxicity reference level
multiplied by the DAF) is below the
analytical quantitation limit, the
quantitation limit is the final regulatory
level. Note that the list of constituents in
Table 112 contains the 14 constituents
currently regulated under the existing
EPTC, As specified in today's rale, these
constituents will continue to be
regulated at their current levels.
TABLE H.2.—TOXICITY CHARACTERISTIC CONSTITUENTS AND REGULATORY LEVELS
EPA HW No.'
D004
D005
0018
DOOS
D019
D020
D021
D022
0007
D023
0024
D025
D026
D016
D027
D028 '
C029
0030
D012
D031
D032
D033
D034
DQ08
D013
0009
0014
D035
D036
D037
0038
0010
D011
O039
D015
D040
D041
D042
0017
D043
Constituent (mg/L)
Barium...,. .....^........».«»«.n...............««...n.,^ .^.L^-I^M....!
BflflZfln^ .....„.»„ „ , « t.^lUl lJt»i ,....»,. ....,.....•.!..
Cafjmiyffi ..»„ ...,..„»,..„.....,..,»..,,«,................. JJ(J, ,. ., .....«L...«-».»«IU . i LJ
Carbon tettacnioride ..«.«.„«».«*»»».»»«.»» «,...„«««.-«......«.„_»«..«...«..««...
CftlOfdafle .-T1TT.T.M.r.oT.-r-OT.rT.,.r..Tt1.1.n — rTrT — m- ™«.«».««.,»««.»™«™.,«.»«™..
CfrtOTOb^Wlfl 1.. ! .
Chloroform .. . ... . I.... . ..... .... « .. * ... ...... 1.
o-Cr&sol .»»„..,....... ».M. ,.„«....,.,..,..,......„-...... .. ............ ™. ....... ». ...™........™.n..........1
p-Cresol «.M»»M».»H..M»..»..««»»H» M«....«,«..«....««.........«....«.«..w«.-^-«.
GrflSOl . I .11... I .. .... ...... .... ...1 .. .!.. ...... ...,.......,......,...-..,.....,.,.„...
2 4-D _ _. ™
1 4-DicWofobenzene .... .. . .. , ..... . ... . .» .......
1 ,2-Dichloroetnane .......... ....»« „..,..,....„„...,.
1 1 -Dichtoroetnyline .... ...... «—.«-.«. „..«..,« ... .......
?t4-pinitfOtQ!U£f)H... ,,.T.,,,, .„..„„.,.„.,....»,....,.,..„..„»....»...,..„.„.......,......-
Endrin.,,, _ ,...» ..,__ » .u m* ,,,nin i
Heptacfilor (and its hydroxide) ...... ............ ....„»......*.._....,.. n .L mu i JLL
Hoxachforobflnzftne ,,,.,..,..,„..,.,,.,...„ <>»,
HftwHcWoro*! 3-^Hitacifflnfl .. ............i................. . ..,,. ...n. •.... u.
HftKacMorowttiana ,.-„ ...... ......^....M......®^. -.<»!.. ..«™.. ..*OI,L...,».,I,,,I,
1 aart ,. -,„,„„-„„ „„,„.,„.,,,,„ .,„. ,., .„.„•,,...
Lirwlarwf . ,, ... , .. ... ,.,. ,„... ,,. ..„ . ----- -nin.Liii ji IIIU.L uii^
M^fn^jry,,,. ,„„,.,„,„...,.,„..„,„,,„,,,.,„„„,„„„.,„.„,„„.„„....„.,..,.,_„,„.„,„..„„.,„„,.„,
Metrto?0fifl „,„.. _«.„.««.„„«,..„,... ™,« , u , „, «
TriChlOTO«thyieRe',^,r1r-,-,r»r,r..,..Tn.,1r., ,....r. .........I...,,.,.....,.... .,..« ... . ... ....
2,4,5-TricftlorcphenoI ._ ,„_., „_.._ „ „_._„,.„.„„.„„.
2,4,8-Trichlofopftenol , ._ .„_. ..._ „„ .,„„„„_.«„
2,4,5-TP (55ih/e») , , .... ,„„„„„,„„„„ ,„„ ,„ , L
Vinyl dllorida _._ , ....„,„ ..„„..,._.„„....,„.„. -„„ ,„
CAS NO.1
7440-38-2
7440-39-3
71-43-2
7440-43-9
58-23-5
57-74-9
108-90-7
67-66-3
7440-47-3
95_4a_7
108-39-4
10B-44-5
94-75-7
106-45-7
107-06-2
75-35-4
121-14-2
72-20-S
76-44-8
118-74-1
87-68-3
67-72-1
7439-92-1
58-B9-9
7439-97-6
72-43-5
78-93-3
98-9S-3
87-88-5
110-86-1
7782-49 2
7440-22-4
127-18-4
8001-35-2
79_01_6
95-95-4
88-06-2
93-72-1
75-01-4
Chronic toxicity reference
teve*(mg/U
0.05
1.0
0.005
0.01
0.005
0.0003
I
0.06
005
2
2
2
2
01
0.075
0.005
0,007
00005
0.0002
0.00008
0.0002
0.005
0.03
0.05
0.004
0.002
01
2
002
1
004
0.01
o.os
0.007
0.005
0.005
4
0.02
0.01
0.002
Regulatory
level (mg/L)
5.0
1000
o.s
1.0
0.5
0,03
100.0
6.0
50
* 200.0
< 200.0
"200.0
«2000
10.0
7.5
0.5
0.7
'0.13
0.02
0.008
S0.13
0.5
3.0
5.0
0.4
0.2
10.0
200.0
2.0
100.0
"5.0
1.0
5.0
0.7
0.5
0.5
400,0
ZO
1.0
0.2
> Hazardous waste number.
1 Chemical abstracts service number.
4 If o, nv, and p-cresol concentrations cannot be differentiated, the total cresol (D026) concentration is used
latorv level.
regulatory level for total cresol is 200 mg/l.
The regulatory levels reflect
modifications to some chronic toxicity
reference levels since the original
proposal. EPA has revised some of the
Maximum Contaminant Levels, Risk-
Specific Doses, and Reference Doses to
reflect new data and better methods. In
response to comments received, EPA
has decided not to apportion reference
doses of noncarcinogens to account for
multiple routes of exposure, as was
originally proposed (51 FR 21648). See
section III.C for further discussion of
comments on apportionment and the
Agency's reasons for not including
apportionment of reference doses in the
final rule. Today's rule also promulgates
the TCLP to replace the EP. The TCLP
represents an improvement over the EP
in that it more accurately addresses
leaching potential for use in evaluating
wastes containing organic constituents,
and also corrects several minor
technical deficiencies in the original EP.
The version of the TCLP promulgated
today reflects additional Improvements
and modifications made to the TCLP
since the original proposal. The TCLP
promulgated today will also replace the
earlier version of the TCLP promulgated
as part of the land disposal restrictions
program.
Today's rule incorporates a schedule
for compliance that classifies the
universe of potentially affected TC
waste handlers into two groups: (1) All
generators of greater than 100 kg/month
and less than 1,000 kg/month of
hazardous waste (small-quantity
generators) must come into compliance
with the subtitle C requirements for
management of their TC waste within 1
year; and (2) all generators of 1,000 kg/
month or more of hazardous waste are
required to comply with all subtitle C
requirements for TC wastes within 6
months. The phased schedule for
compliance is further discussed in
section V.
Wastes identified as hazardous under
the Toxicity Characteristic will also
become hazardous substances under
section 101(14) of the Comprehensive
Environmental Response,
Compensation, and* Liability Act of 1980
(CERCLA), as amended. Today's rule
amends the list of reportable quantities
(RQs) in 40 CFR part 302 by adding
appropriate values for each of the new
25 TC toxicants. All of the newly-
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Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations
11805
designated TC toxicants are already
listed as CESCLA hazardous
substances. The RQs being promulgated
are the same as those that already apply
to all materials containing these
hazardous substances.
Today's rule defers applicability of
the TC to one type of waste and
exempts another. First, the Agency is
deferring the applicability of the TC to
petroleum-contaminated media and
debris at sites subject to the RCRA
Underground Storage Tank (UST)
cleanup regulations undsr part 280, (See
section III.I.6.) Second, EPA has decided
to exempt from today's rule certain
polyrbiorinatad biphenyl (PCBJ wastes
, that are fuliy regulated under the Toxic
Substances and Control Act (TSCA) and
would be identified as hazardous
because of today's rale (See section
IIIJ.7.).
In portions of the existing codified
waste regulation of title 40, chapter I,
parts 261 through 283, the EPIC is
named. Today's action of promulgating
the TC necessitates amendment of these
references to the EPTC. This amendment
which replaces references to the EPTC
with the words "Toxicity
Characteristic" applies to ths following
sections of 40 CFR: 261.4(b)(6](i) not
(A){B)(C): 261.4(b)(9), 264.301{e)(l).
265.221fd)(l) and 265.273{a).
In §§ 264.301(e)(l) and 265.221(d)(l), in
addition to amending reference to. the
EPTC, the universe of constituents
remains the same as the EPTC. To
accomplish this, the constituents DOGi—
D017, the EPTC constituents, are
specifically named as those constituents
which would not render the waste
hazardous by the TC,
As discussed below, the Agency will
continue to refine the TC in order to
provide greater accuracy and
comprehensiveness in identifying
hazardous waste based on the waste's
toxic constituents. However, the Agency
believes that today's rule fulfills the
statutory mandates under sections
SOOlfg] and 3001 (h). '
III. Response to Major Comments and
Analysis of Issues
The Agency received many comments
on the June 13,1986 proposed rule and in
response to subsequent notices. The
Agency has carefully considered all
comments in the preparation of this final
rule. To facilitate the evaluation and
response to comments, the Agency
grouped the comments into ten
categories. The categories are as
follows:
A. General Approach
B. Constituents of Concern
C. Chronic Toxicity Reference Levels
D. Use of Generic DAFs
E, Application of a Subsurface Fate and
Transport Model
F.TheTCLP
G, Testing and Recordkeeping
Requirements
H. Applicability to Wastes Managed in
Surface Impoundments
1. Relationship to Other RCRA
Regulations
J. Relationship to Other Regulatory
Authorities
In this preamble, the Agency provides
summaries of and responses to major
comments. Readers are invited to refer
to background documents (Refs. 1, 2, 3,
and 4) for complete summaries and
responses to all comments.
A. General Approach
1. Expanded Uss of Hazardous Waste
Characteristics.
The TC revisions specified in today's
rule refine and expand the EPTC. Most
commenters stated that increased
reliance on .hazardous waste
characteristics is a reasonable approach
to defining hazardous waste. Some
commenters stated a preference for the
hazardous waste characteristic
mechanism over the alternative listing
mechanism for identifying hazardous
wastes. They noted that the
characteristics are designed to measure
directly the risks that subtitle C
regulations ara meant to control.
Another advantage mentioned by
commenters is that hazardous waste
characteristics apply uniformly to all
wastes, regardless of source.
A few commenters, however, objected
to the expanded use of hazardous waste
characteristics. Some of these
commenters questioned the Agency's
authority to develop the TC. One
commenter asserted that RCRA section
3001(h] does not authorize EPA to take
the action of adding the proposed
organic constituents to the list of TC
constituents. Another argued that the
legislative history of HSWA indicates
that changes in the leaching procedure
should address the leaching of toxic
metals only. This commenter claimed
that the Agency had exceeded its
statutory mandate by modifying the TC
to include organics.
EPA strongly disagrees with those
commenters who argued that the
Agency lacks authority to expand the
TC. The Agency's approach to
identifying hazardous wastes through a
self-implementing characteristics
procedure was well established in 1984,
when Congress passed HSWA. HSWA
not only confirmed the validity of EPA's
approach to identifying hazardous
wastes by characteristics, but also
directed the Agency to expand the scope
of the TC. RCRA section 3001 (h) states
"* * * the Administrator shail
promulgate regulations under this
section identifying additional
characteristics of hazardous waste.
including measures or indicators of
toxicity." Thus, the plain language of the
statute authorises EPA to broaden the
TC.
Other commenters acknowledged
EPA's authority to expand the TC, but
offered policy arguments against the use
of this mechanism for identifying
hazardous wastes. Most commentars
who argued against expanded use of
characteristics favored use of the listing
mechanism instead of an expanded TC.
Scrr.e of these commenters nolsd that
listings do not present the same
technical problems of precision and
accuracy as the characteristics. Others
stated that listings are more easily
enforced since they are not dependant
upon use of a leaching procedure.
Finally, some commenters claimed that
by expanding the toxicity characteristic
instead of listing additional wastes, EPA
is unfairly shifting the burden for
identifying hazardous wastes onto the
shoulders of the regulated community.
The Agency maintains that the
expanded use of characteristics, in
addition to being consistent with the
statutory mandate, offers advantages
over listing for identifying broad
categories of clearly hazardous waste.
Establishing a characteristic allows the
Agency to identify through one rule
those wastes which are reasonably
certain to pose a threat to human health
and the environment by virtue of an
inherent characteristic without
expending vast Federal resources to
study, characterize, and list numerous
individual wastestreams. Since the
Agency sets regulatory levels high
enough to assure that wastes exhibiting
the'characteristic are hazardous, the
characteristic approach does not bring
wastes into the subtitle C system which
do not present a substantial present or
potential hazard to human health and
the environment By contrast, a listing.
since it applies to all wastes that meet a
listing description, may capture some
individual wastestreams that do not
actually pose a threat to human health
and the environment. Generators may
petition for delisting if this occurs;
however, the deliating process can be
burdensome to the petitioner and to
EPA.
The Agency believes that the
characteristic approach has the
following advantages. First, it is less
burdensome for *he regulated
community because the characteristic
approach limits over-inclusiveness.
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11806 Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations
Second, reducing the potential of
including wastes that do not, in fact,
present a threat conserves hazardous
waste management capacity and
Agency administrative and enforcement
resources for waste management
activities that warrant priority attention.
Finally, if necessary, a characteristic
can be adapted quickly to possible
future changes in science or technology.
such as lower quantitation limits.
EPA acknowledges that there are also
some advantages in using the listing
mechanism for identifying hazardous
wastes, particularly with respect to ease
of implementation; the Agency thus will
retain the listing approach as an
alternative mechanism for identifying
hazardous wastes. The Agency
continues to believe that both the
characteristic and listing approaches are
valid and useful tools in identifying
hazardous wastes that are subject to
subtitle C regulation.
Finally, the Agency disagrees with
commenters who contend that
characteristics impose an unfair burden
on the regulated community. Since the
establishment of the hazardous waste
identification framework in 1980, EPA
has recognized that the primary
responsibility for determining whether
wastes exhibit hazardous waste
characteristics rests with generators. In
accordance with this, one of two criteria
for establishing new characteristics is
that they must be measurable by
standardized and available testing
protocols or reasonably detected by
generators through their knowledge of
the waste (see 40 CFR 261.10). Further,
the regulations do not require testing; a
generator may apply knowledge of the
waste to determine if it is hazardous (40
CFR 262.11).
2. Mismanagement Scenario
Hazardous waste characteristics are
designed to identify solid wastes that
pose a threat to human health and the
environment when improperly managed
(RCRA section 1004(5}). Therefore, in
developing the TC, EPA's first task was
to determine how wastes might
plausibly be mismanaged. The
mismanagement scenario that both was
reasonably realistic and presented the
greatest environmental risks could then
be chosen as the reasonable worst-case
scenario and used as the basis for the
revised characteristic. Specifically, the
characteristic would be designed to
identify any wastes from which toxic
constituents would be likely to pose a
threat to human health and the
environment when managed in
accordance with the selected scenario.
In this way, EPA ensured that wastes
would be adequately controlled.
regardless of the manner in which they
are actually managed.
In the June 13,1986 proposal, EPA
considered several alternative
mismanagement scenarios for use in the
development of the TC rule, including
segregated management, co-disposal
with municipal solid waste (the
mismanagement scenario evaluated in
the existing Toxicity Characteristic), co-
disposal with industrial waste in a
landfill subject to subtitle O
requirements, and co-disposal with
industrial waste in a landfill subject to
subtitle C requirements that suffers
some form of containment-system
failure. The Agency rejected the subtitle
C scenario as unrealistic because it is
unlikely that waste generators would
dispose of their wastes in the more
expensive subtitle C landfills unless
required to do so. Thus, it would not be
a realistic scenario.
EPA determined that each of the
remaining options was a plausible
mismanagement scenario since most
wastes are or may be managed in these
types of land disposal facilities. The
Agency rejected the segregated
management or "monofill" scenario on
the grounds that it did not represent a
realistic worst-case practice. Facilities
dedicated to the management of only
one waste or the wastes of only one
generator (i.e., a "monofill") are likely to
pose less of a hazard than general
municipal or industrial landfills because
the design and operation problems for a
monofill are simpler and the operators
generally have considerably more
information on the properties of the
wastes that are managed. Also,
industrial monofills generally do not
generate organic acids that result in an
aggressive leaching medium, as is the
case for municipal landfills. Thus,
industrial monofills pose less of a
potential hazard than municipal solid
waste (MSW) landfills. EPA also
rejected the general (as opposed to
"monofilT'j industrial landfill scsnario
on similar grounds (i.e., the generated
leaching medium may not, in some
cases, be as aggressive as in a municipal
landfill). The Agency therefore retained
the municipal landfill scenario as the
reasonable worst-case mismanagement
scenario for the revised TC.
a. Extent to Which Scenario is
Reasonable. Several commenters
challenged the municipal landfill
scenario, claiming that it is based on an
unreasonable assumption about the way
in which industrial solid wastes are
managed. These commenters claimed
that industrial wastes are rarely
disposed is MSW landfills. If landfilled
at all, these wastes are more likely to be
disposed in industrial landfills. In
addition, industrial wastes are
frequently managed in ways other than
landfill disposal (e.g., incineration,
recycling, treatment on the land, or
treatment in surface impoundments).
Thus, commenters argued, it is
inappropriate to base the TC on the
municipal landfill scenario.
EPA fully recognizes that not all
industrial wastes are managed in MSW
landfills. Nevertheless, the Agency
continues to believe that the MSW
landfill scenario is reasonable because
such landfills have traditionally
accepted unregulated industrial wastes.
It is for this reason that the MSW
landfill scenario was originally
established as the basis for the EPTC
(see 43 FR 33112, May 19,1980).
Although fewer types of industrial
wastes are being disposed in municipal
landfills now as compared to a few
years ago, EPA's information confirms
the continued appropriateness of this
scenario. The "State Subtitle D
Regulations on Solid Waste Landfills"
(Ref. 5), and the "National Survey of
Solid Waste (Municipal] Landfill
Facilities" (Ref. 6) indicate that most
states impose few restrictions, if any, on
the types of nonhazardous wastes
accepted at these facilities; moreover, a
substantial quantity of the wastes
received (typically five to eight percent)
are industrial wastes. Thus. EPA
continues to believe that the municipal
solid waste landfill scenario represents
the most appropriate reasonable worst-
case mismanagement scenario.
Many commenters suggested that EPA
grant exceptions or variances for wastes
that are not co-disposed with MSW. In
this way, the TC would apply only to
those wastes that are actually managed
in accordance with the underlying
mismanagement scenario. The
commenters noted that EPA could
separately develop alternative
characteristics for wastes managed in
other ways to ensure adequate
protection of human health and the
environment.
After careful consideration, EPA has
decided not to adopt this suggestion for
various reasons. Applying the TC only
to wastes actually managed as
suggested in the mismanagement
scenario would involve the creation of a
management-based approach to
identifying hazardous wastes. EPA's
current approach to establishing
characteristics which identify certain
wastes as hazardous is not contingent
upon the way individual wastes are
actually managed. Rather, consistent
with the RCRA Section 1004(5)
definition of hazardous waste, EPA is
g -V
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11808 Federal Register / Vol. 55. No. 61 / Thursday, March 29. 1990 / Rules and Regulations
2. The "physical property-based" approach.
which would apply to those wastes having a
certain physical property indicating that they
are likely to be managed in surface
impoundments (e.g., percent solids less than 5
percent); and
3. The "definition-based" approach, which
would apply to those discharged wastewaters
that are subject to regulation under either
section 402 or section 307(b) of the Clean
Water Act
Commenters from various industries
generally supported a separate
mismanagement scenario because they
do not believe that the landfill
mismanagement scenario is appropriate
for aqueous wastes managed in surface
impoundments. Most of these
•commenters requested that EPA adopt
either the management-based approach
or the definition-based approach.
Other commenters, however, opposed
a separate mismanagement scenario for
wastes managed in surface
impoundments. These commenters
contended that the surface
impoundment mismanagement scenario
would not be a reasonable worst-case
scenario, particularly if the scenario
modeled biodegradation. because
significant biodegradation does not
occur in all impoundments. In addition,
the commenters stated that if the
development of a surface impoundment
mismanagement scenario results in two
sets of regulatory levels, requirements
for storage, handling, and transportation
of a waste would be based on the
management practice that the generator
assumes or expects will actually occur.
These commenters were opposed to this
result and noted that wastes may not
always be ultimately disposed in the
manner originally intended by the
generator.
After receiving these comments, the
Agency decided to revisit the issue of
whether or not a separate
mismanagement scenario is necessary
for surface impoundments due to
inappropriately low regulatory levels.
As described in section III.E.2, the
Agency believes that evaluation of the
physical phenomena that affect dilution/
attenuation factors (DAFs) indicates
that the DAFs generated for landfills are
similar, if not greater than, DAFs for
surface impoundments (i.e., the
regulatory levels for surface
impoundments would be equal to or
more stringent than those for landfills).
To confirm this conclusion. EPA then
investigated whether results from
modeling a surface impoundment
scenario would in fact be significantly
different from modeling a landfill
scenario. As described later in this
preamble, for nondegrading
constituents, EPA calculated the 85th
and 90th percentile DAFs for landfills
(which ranged from 134 to 47) and the
85th and 90th percentile DAFs for
surface impoundments (which ranged
from 111 to 51). The surface
impoundment results were obtained by
using the updated model (EPACML) for
the landfill scenario with leachate
generation and environmental
parameters (e.g., well distances, facility
areas) derived from surface
impoundment data.
As a result of this analysis, EPA is
confident that the results from modeling
of the landfill mismanagement scenario
are also appropriate for wastes
managed in surface impoundments (i.e.,
the DAFs are of the same order of
magnitude). The Agency therefore does
not plan to develop a separate surface
impoundment misma-nagement scenario
at this time. Since the modeling results
indicate that the dilution/attenuation
factors for non- and minimally
degrading constituents are all on the
order of 100, the Agency has concluded
that a single value of 100 is an
appropriate choice for use in
establishing the regulatory levels for all
of the constituents addressed in today's
rule. (See section UI.E. of this preamble
for an additional explanation of EPA's
modeling efforts and choice of DAFs.)
3. Targeted Risks
Several commenters argued that, even
if the co-disposal mismanagement
scenario was appropriate, EPA
improperly focused on a few selected
risks from this scenario. Specifically,
they claimed that the Agency restricted
its consideration to human health risks
resulting from ground water
contamination. A number of
commenters stated that the Agency
should consider additional routes of
human exposure, such as air
volatilization, surface runoff, and direct
contact. One commenter questioned
why EPA was not employing the same
multimedia risk and exposure models
that were originally proposed for use in
the land disposal restrictions program
(see 51 FR 1602, January 14,1986).
A few commenters further suggested
that EPA take environmental risks (e.g.,
aquatic toxicity) into account, rather
than concentrating exclusively on
human health risks. They noted that
RCRA section 3001(g), on which the TC
rule is based, directs EPA to make
changes in the EPTC so that it
"accurately predicts the leaching
potential of wastes which pose a threat
to human health and the environment
when mismanaged" (emphasis added).
EPA acknowledges that the
characteristic being promulgated today
focuses on human health risks from
ground water contamination. However,
the Agency does not believe that a
single characteristic is capable of
identifying all wastes that present a
threat to human health and the
environment. The present TC revisions
are only the first step in a long-term
strategy to refine and expand the
hazardous waste identification program.
Future characteristics may address
hazards other than human health risks
resulting from ground water
contamination. EPA continues to
believe, however, that ground water
contamination, as a route of human
exposure, is a priority concern.
4. Accuracy
Several commenters asserted that the
proposed TC revisions failed to fulfill
the statutory mandate to improve the
"accuracy" of the characteristic as a
predictor of the leaching potential of
solid wastes. Specifically, these
commenters argued that, even if EPA
selected the proper mismanagement
scenario, the Agency failed to model the
targeted risks in a reasonable or
appropriate manner. (Many of the
commenters addressing this issue also
focused on the accuracy of individual
elements of the characteristic, such as
the TCLP, the subsurface fate and
transport model, or the chronic toxicity
reference levels. These specific concerns
are considered in sections UI.B through
III.F of today's preamble.)
A number of the commenters on the
issue of accuracy concentrated on the
interrelationship between the various
elements of the TC. These commenters
pointed out that EPA had employed
conservative assumptions at each step
in the development of the revised
characteristic. They argued that even if
these assumptions were reasonable in
isolation, they would not be reasonable
in combination. According to these
commenters. the effect of compounding
multiple conservative assumptions
would be a characteristic that is
unreasonably conservative, thereby
resulting in costly overregulation.
Other commenters maintained the
opposite position and stated that EPA
had employed non-conservative
assumptions for many elements of the
characteristic. These commenters
believe that these assumptions result in
a characteristic that is not conservative
enough and, thus, not sufficiently
protective of human health and the
environment.
The Agency disagrees with
commenters' assertions that the
elements of the TC are either too
conservative or not conservative
enough. The TC, in particular the fate
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11807
identifying \vaste "* * * that may pass
a substantial present or potential hazard
to human health and the environment
when improperly " * * managed"
(emphasis added).
EPA has considered the possibility of
developing management-based
characteristics, i.e., different
characteristics for categories of waste
depending on how they are typically
managed. However, the Agency believes
that such an approach would present a
number of difficulties. For instance, a
management-based approach to
hazardous waste identification could
substantially complicate effective
implementation of the RCRA
regulations. In particular, it is not «
always possible to determine—at the
point of generation, during transport, or
even as a waste enters a treatment,
storage, or disposal facility—how a
solid waste will ultimately be managed.
EPA believes that the most effective and
appropriate approach is to identify
hazardous waste characteristics, not
according to the ways in which
individual wastes are managed, but by
identifying properties of wastes that
would pose a threat to human health
and the environment if improperly
managed. The Agency maintains that
co-disposal with MSW is a
mismanagement scenario that is
reasonably realistic for most industrial
solid wastes.
Another group of commenters
suggested that EPA exempt broad
classes of wastes that, because of their
volume or physical properties, cannot
reasonably be placed in a municipal
landfill. Commenters specifically
mentioned wastewaters, mining wastes,
and municipal waste combustion ash.
They noted that separate characteristics
could be developed for each class of
wastes that is excluded from the TC,
based on the most appropriate
mismanagement scenario for each
individual category of waste.
After careful consideration of these
comments, the Agency agreed that one
category of wastes, waslewaters, might
warrant special consideration based on
the fact that the mismanagement
scenario may not be reasonably
applicable. Thus, EPA published a
Supplemental Notice of Proposed
Rulemaking on May 18,1987 (52 FR
18S83), which asked for comment on the
development of separate regulatory
le\'els for wastewaters. EPA received
considerable information in response to
this notice, and reviewed additional
information on management of
wastewaters in surface impoundments.
After analysis of the waste management
tenhnioues, attanuative mechanisms,
and hydrogeologic processes that govern
constituent transport from surface
impoundments, the Agency concluded
that the DAFs for nondegrading
constituents managed in surface
impoundments were similar to those for
the same constituents managed in
landfills. Thus, for today's rale, the
Agency determined that there is no
technical basis for setting separate
regulatory levels for wastewaters. This
issue is discussed in more detail in
subsection C, and further in sections
III.E (Application of a Subsurface Fate
and Transport Model) and III.H
(Applicability to Wastes Managed in
Surface Impoundments).
The Agency also dees not agree that
the mismanagement scenario is
unreasonable for either non-exerapt
mineral processing wastes or municipal
combustion ash. Although large volume
wastes from the extraction,
bcneficiation.and processing of eras and
minerals are currently exempt from
subtitle C regulation and will not be
affected by the TC rule, small volume
mineral processing wastes which may
be subject to subtitle C regulation (see
54 FR 36592) can plausibly be disposed
in municipal landfills. Municipal waste
combustion ash can also be disposed in
municipal landfills; in fact, the Agency
estimates that only about 30 percent of
municipal waste combustion facilities
utilize ash monofills, and rely
principally on municipal landfills for ash
disposal. Issues related to the regulation
of municipal waste combustion ash are
discussed further in section IIl.i.5.
b. Worst-Case Scenario Selection. A
few commenters agreed with EPA that
the municipal landfill scenario is
reasonable, but they claimed that the
scenario does not represent a
reasonable worst case. Most of these
commenters asserted that co-disposal ia
a subtitle D industrial landfill poses
more of a threat to human health and
the environment than disposal in an
MSW landfill. They pointed out, for
example, that the regulatory standards
for subtitle D industrial waste landfills
are gfinerally no more stringent than
those for municipal landfills. Ths
ccmmentera further claimed that the
leaching media in industrial landfills are
frequently more aggressive than those in
municipal landfills, especially when
acids, bases, and solvents are present
Finally, the commenters noted that
wastes placed in industrial landfills are
not diluted with domestic wastes, as
they are in a municipal landfill. The
commenters concluded that because the
TC proposal was based on a scenario
that was less than worst-case, it would
not adequately protect human health
and the environment.
The Agency believes that the leaching
media in a subtitle D municipal landfill
is typically more aggressive than
leaching media generated in industrial
landfills due to the formation of acids
during decomposition of putrescible
wastes. "State Subtitle D Regulations on
Solid Waste Landfills" (Ref. 5) shows
that putrescible wastes are accepted at
most subtitle D municipal landfills,
while "Summary of Data on Industrial
Non-Hazardous Waste Disposal
Practices" (Ref. 7) shows solvents, acids,
and bases (which can also increase the
aggressiveness of leachate) are
generally not disposed of in subtitle D
industrial landfills. The potential for the
formation of acids from decomposition
of putrescibles in a subtitle D municipal
landfill is greater than the potential of
acids, bases, or solvents being present
in a subtitle D industrial landfill,
therefore supporting the municipal
landfill scenario as a reasonable worst-
case.
EPA acknowledges that, in certain
circumstances, industrial wastes may
pose more of a threat when placed in a
subtitle D industrial landfill than when
placed in a subtitle D municipal landfill.
However, EPA believes that this
situation will only occur in certain
circumstances and thus represents a
worst cose rather than a reasonable
worst case. Should the occurrence of
this situation increase in frequency, the
Agency will reconsider its approach for
regulating these wastes in the future.
c. Exient to Which the
Mismanagement Scenario for Wastes
Managed in Surface Impoundments is
Appropriate, In the May 18,1S87 notice.
the Agency stated that it is considering
developing a separate mismanagement
scenario applicable to wastes that are
managed in unltned surface
impoundments. Developing a surface
impoundment scenario, in addition to
the landfill scenario, would mean that
the TC would have two different sets of
regulatory levels. Waste generators
would first have to determine which
scenario is appropriate and then would
be responsible for evaluating whether
their waste excseded the applicable
regulatory levels.
In the notice, the Agency requested
comments on the appropriate criteria to
be used in determining whether the
characteristic should apply to a
particular waste. The Notice suggested
three possible approaches:
1. The "management-based" approach,
which would apply only to those wastes
actually managed in impoundments;
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12S09
and transport model used to establish
the dilution/attenuation factors (DAFs),
requires the selection of numerical
values for many parameters. Rather
than selecting values for each parameter
based upon isolated judgments as to
what constitutes a "reasonable worst
case" value, the Agency used the full
range and distribution of values fo«- all
parameters for which such data was
available. By implementing these data
sets through a monte carlo simulation,
the model output (i.e., the frequency
distribution of DAFs) is as realistic as
possible and spans the range of all
possible outcomes rather than
representing only the "best case,"
."reasonable worst-case," etc. That is.
the model output represents all cases,
arrayed according to their frequency of
occurrence, and does not reflect any
qualitative judgement as to what
constitutes a "reasonable worst case" or
any other "case." Accordingly, the
determination as to which DAF value
represents any particular "case" is
solely dependent upon the selection of
the cumulative frequency level. The
Agency's selection of the cumulative
frequency level is discussed in section
llLE.4.d.
EPA does agree with commenters who
recommended that the originally
proposed subsurface fate and transport
model could be revised to more
realistically represent land disposal
settings. Accordingly, EPA has modified
the original model (EPASMOD) and has
collected and incorporated new data
into the model. These modifications and
data are described in greater detail
bslow {section HLE). The reader ia
referred to the Response-to-Coaunents
Background Document for the
Subsurface Fate and Transport Module
(Ref. t), which presents in detail each of
the technical issues raised by public
comments on the model and the
Agency's responses to these issues. EPA
believes that with these changes, the
final TC rule represents a reasonable
approach to the identification of
hazardous wastes,
5. Solvent Override
In the June 13,19fl8 TC proposal, the
Agency discussed the possibility of
incorporating a solvent "override"
criterion into the TC because the
presence of large amounts of solvents in
a waste may result in leacbate from the
waste mobilizing hazardous constituents
from co-disposed nonhazardous waste.
The Agency considered setting
regulatory levels for solvents based on.
; the total concentration of solvent found
, in the TCLP extract.
I Many commenters claimed that
! mobilization of toxicants in municipal
landfills by industrial solvents is
improbable. Commenlers argued that
there are no data to support the
hypothesis that industrial solvents
would alter the solubility of hazardous
constituents in municipal waste. These
coramenters asserted that, at levels
below thair solubility in water, organic
solvents exert very little influence on
the solubility of other organics. Given
the low concentrations of solvent
wastes permitted for land disposal, the
commenters contended that there is
little probability that mobilization will
occur. Commenters emphasized that, in
general, subtitle D landfills do not
accept organic solvents or liquids. Most
industrial solvents already are listed
hazardous wastes under 40 CFR 261.32
and 281.33 and will be managed in
subtitle C hazardous waste fatalities.
Also, commenters contended that the
contribution that industrial solvents will
have on the solvent power of a solid-
waste-iandfili leachate is small
compared to the contribution from
solvents in household and small
quantity generator waste.
Other commenters, however,
expressed their support for EPA's
proposal to characterize a waste by its
ability to leach hazardous constituents
from co-disposed wastes. They urged
that a method be devised to monitor the
influence that solvents have on the
solubility of other waste constituents.
One commenter suggested that the TCLP
leachate could be tested for its ability to
dissolve hazardous waste.
After careful consideration of the
comments on this issue, EPA has
decided not to include a solvent
override in today's revision of the TC,
EPA is not convinced by commenters
who stated conclusively that
mobilization of toxicants in municipal
landfills by industrial solvents is
improbable. EPA also is not convinced
that the solvent contribution of
industrial wastes at municipal landfills
is small compared to that of household
waste and small quantity generator
waste. Moreover, the comparison to
household waste and small quantity
generator waste is not relevant to the
issue of whether industrial wastes
should be regulated based on solvent
properties. However, the Agency does
agree that there is insufficient data
concerning the degree to which
industrial solvents would mobilize other
hazardous constituents and the amount
of solvent wastes that are actually land
disposed. Given this lack of data, a
solvent override has not been included
in today's rale. However, an override
may be considered in future rulemakings
if information becomes available that
indicates a characteristic based on
solvent properties is warranted.
One commenter claimed that RCRA
does not authorize the imposition of
restrictions based on toxicity simply
because a substance can mobilize othor
constituents. The commsnier asserted
that the authority may reside elsdwiwrw
in RCRA, but in that case, a separate
rulemaking, net involving the TC, should
take place.
EPA does not agree; RCRA cleaiiy
authorizes EPA to regulate a waste as
hazardous on the basis of ils ability to
mobilize other constituents. Further,
regulating a waste as hazardous based
on its ability to mobilize other
constituents couid be appropriately
achieved through the characteristic
mechanism. A solid waste is defined as
hazardous if its "physical" or
"chemical" characteristics "may pose a
substantial present or potential hazard
to human health or the environment
when improperly treated, stored,
transported, disposed of, or otherwise
managed" {RCRA section 1004(5)). The
capacity to mobilize toxic constituents
falls within the definition of a physical
or chemical characteristic of a waste
which may pose a substantial
environmental or health hazard. Thus,
EPA may incorporate this approach into
its characteristic waste identification
scheme in the future.
Related to the issue of solubilization,
another commenter asserted that if a
chemical's capacity for mobilization is
considered, treatment implemented to
prevent mobilization (e.g., stabilization,
containment, and chemical conversion)
should be given equal consideration.
The TCLP does consider
immobilization in the context of the co-
disposal mismanagement scenario. The
TCLP was developed to simulate
leaching in a municipal landfill,
addressing the degree of mobility (or,
conversely, immobility) of both organic
and inorganic compounds. Wastes thai
have been treated to prevent
mobilization are less likely to leach
toxic constituents. Such wastes may
cease to exhibit the TC and would
therefore no longer be considered
hazardous wastes. Thus, the TCLP
already accounts for immobilization of
toxic constituents in a waste. However,
if wastes that have been treated to
prevent mobilization fail the TC EPA
believes that the wastes in question
should be managed as hazardous
wastes.
B. Constituents of Concern
As noted above, the proposed TC rule
identified 52 constituents that, if present
a! specified levels in a waste extract.
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11810 Federal Register / Vol. 55, No, 61 / Thursday, March 29, 1990 / Rules and Regulations
would render the waste "hazardous"
under RCRA subtitle C. Fourteen of the
constituents were already encompassed
by the existing EPTC. The selection of
the remaining 38 constituents was based
on the availability of adequate and
verified data necessary for establishing
(1) a chronic toxicity reference level and
(2) a constituent-specific DAF, Thus, the
Agency focused on those constituents
for which there existed a promulgated or
proposed Maximum Contaminant Level
(MCL), a Reference Dose {RfD), or a
Risk-Specific Dose [RSD], and for which
there were sufficient data on
environmental fate and transport
processes to support modeling of a
constituent-specific DAF. The June 13,
1986 proposal also announced EPA's
intention to expand the list of TC
constituents as additional data became
available.
1. Final List of Constituents
The Agency is finalizing the
regulatory levels for 25 of the proposed
organic constituents (see Table B-l) that
do not readily hydrolyze and for which a
steady-state subsurface fate and
transport model is appropriate. EPA
may promulgate or repropose (as
warranted) regulatory levels for the
other organic constituents at a future
date.
TABLE B-1.—LJST OF ORGANIC CONSTITU-
ENTS INCLUDED IN THE EXPANDED TC
RULE
Carbon tetrachlonda..
(Montana „..
Chtorabeozane
m-Creso) ;.._—~.
o-CresoI —,
p-Crastrf
1,4-Ojchtorobeftzone..
1,2-Qiehlofoetfarw—
1,1-Dichloroethylene..
2,4-Dinitfotoluene .„...
Heptachlor (and its
hydrcwKJej.
,3-
butadiene
— He>cacrtofob«f!zena
— Hexachlofoettana
.... Methyl ettiyi ketone
— Nrtrobenzerte
— Pentacfiksrophenol
_.._ Pyridine
— Tetraehioroetnytena
...... Tncfitofoethyleoe
— 2,4,5-Trichlofophenol
— 2,4,6-Trichlo«sphenol
„„,. Vinyl eWorld*
Constituents with regulatory levels
established under the EPTC will
continue to be regulated at previously
established levels, but will require
application of the new TCLP instead of
theEP.
2. Toxicants Versus Indicator
Parameters
A few commenters recommended that
EPA abandon its current focus on
individual toxicants and rely instead on
such indicator parameters as total
organic carbon or total organic
halogens. The commenters argued that
such an approach ivould broaden the
effective scope of the rule and reduce .
the burdens associated with making
hazardous waste determinations.
The Agency does not believe it would
be-appropriate to use indicators as part
of the TC. Indicators generally are used
as screening levels or to set priorities for
further investigations. They do not
achieve sufficient specificity for the
regulatory purposes of the TC. For
instance, the two indicators suggested
by the commenters do not in any way
reflect differences in toxicities among
organic constituents. Consequently, use
of these indicators could lead to both
nonhazardous wastes registering as
hazardous and wastes that are clearly
hazardous registering as nonhazardous.
3. Method for Selecting Constituents
Several commenters questioned the
manner in which EPA selected toxicants
for inclusion in the TC proposal. Some
of these commenters charged that the
Agency's choice of toxicants was
entirely arbitrary. Others claimed that
EPA had based its selections solely on
the availability of toxicologic and
hydrogeologic data, without considering
the magnitude of the hazards presented
by the constituents.
The commenters, in general,
encouraged EPA to.develop specific
procedures and criteria for deciding
which constituents should be included
in the TC, A few commenters offered
particular suggestions for the types of
factors that might be considered in
evaluating toxicants. The recommended
factors included (1) the mobility and
persistence of the constituents, (2) the
frequency with which particular
constituents have been found in
industrial wastes or leachates from such
wastes, and (3) the extent to which
various constituents have been detected
in ground water supplies in
concentrations capable of posing a
threat to human health and the '
environment.
EPA believes that its method for
selecting TC constituents is both
rational and consistent with the
statutory mandate. While selection of
constituents in today's rule is in part
based on available lexicological data, it
should be noted that both the fate and
transport of constituents and the
magnitude of hazards posed were also
given consideration. The toxicants for
which regulatory levels are being
promulgated today are persistent and
can represent a substantial threat to
human health and the environment.
Because of the lack of reliable data on
the frequency with which certain toxic
pollutants are found in leachates or
ground water, an approach relying on
such information would not provide an
accurate and valid basis for selecting
constituents. Further, where data do
exist concerning the frequency at which
certain constituents are found in the
environment, accompanying information
about risk posed in the environment is
often absent.
Although the Agency proposed levels
only for toxicants for which it has
adequate and verified data, generally
these data are available because these
toxicants do represent a substantial
threat to human health and the
environment. The Agency will consider
adding constituents as additional
toxicological data and other supporting
data become available: in making such
decisions, the Agency will consider the
factors identified by the commenters.
Until such data are available, there is no
technical basis to determine at what
level a waste is hazardous under the TC.
A number of commenters argued that
EPA was needlessly "cluttering" the
characteristic with low-priority
constituents that are either not being
produced in the United States or are
primarily found in wastes that are
already subject to regulation.
The Agency does not agree that a
substance no longer manufactured in the
U.S, will not pose a threat from waste
disposal. Some such substances may be
contained in products imported into the
U.S. Also, wastes generated during
cleanup at Superfund sites or RCRA
corrective action sites may exhibit the
TC due to the presence of these
constituents in wastes disposed at some
time in the past Further, the
constituents could be manufactured
again in the future.
Several of the toxicants listed in
today's rule also appear among the list
of discarded commercial chemical
products, off-specification products, and
container and spill residues, as listed in
40 CFR 261.33. A group of commenters
argued that it would be redundant to
establish regulatory levels for these
toxicants because they are already
regulated as listed hazardous wastes.
Similarly, several commenters argued
that some other listed wastes are
regulated as hazardous wastes primarily
because they contain constituents that
will be regulated under the new TC.
EPA does not agree that setting levels
for the selected toxicants would be
redundant While it is true that many of
the newly designated TC constituents
are constituents in wastes that are
specifically listed as RCRA hazardous
wastes, the current listings do not cover
all of the wastestreams that may contain
the TC constituents. For example, the
commercial chemical product listings in
40 CFR 261.33 primarily encompass
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11811
unused products and off-specification
variants of products that are generically
identified using the name of a single
toxic constituent; however, the listings
would not cover other wastestreams
containing the same constituent. The
listings in 40 CFR 261.32 specify only a
limited number of wastesireams that
contain TC constituents. As another
example, the spent solvent listings in 40
CFR 281.31 cover only those solvents
that are used for their "solvent"
properties (i.e., to solubilize or mobilize
other constituents). The current listings
do not encompass process wastes where
solvent constituents are used as
reactants or ingredients in the
formulation of commercial chemical
products. The Agency has previously
stated that it is expanding the TC to
bring these wastestreams into the
hazaidous waste management system
(see 50 FR 5331", December 31,1985).
Thus, the Agency is appropriately
promulgating TC regulatory levels for
some constituents that have been used
as the basis for listings.
One commenter argued that EPA's
approach in selecting TC constituents
was too restrictive, ensuring that many
toxic constituents may nevsr be
regulated. The commenter emphasized
that reliance on MCLs, RfDs, and RSDs
does not provide a comprehensive list of
constituents for which reliable
toxicological data exist. In addition, the
commenter noted that reliance on
h-iman health data does not necessarily
address hazards to the environment.
EPA disagrees with the commenter's
first point. Reliance on MCLs, RfDs, and
RSDs uses the most sound toxicologic
data base available to the Agency. At
present, there are more than 365
constituents with verified toxicity levels
available for EPA use. In regard to the'
second point, the Agency recognizes
that factors other than human health
effects are also important to the overall
protection of the environment, but
points out that the purpose of this
characteristic is to identify wastes that
pose hazards to human health via a
ground water contamination route. In
regard to the other factors, the Agency is
supporting a research effort focusing on
the determination of action levels for
ecological effects and evaluating
appropriate exposure assessment tools.
When sufficient information concerning
these ecological risks is available, the
Agency will compare the ecological-risk-
based levels to the TC regulatory levels
to determine whether further revisions
to these levels, based on ecological risk,
are necessary.
4. Specific Organic Constituents
Many commenters expressed concern
over several of the specific organic
constituents that EPA proposed to
include In the TC. The comments
focusing on specific toxicants are
discussed below.
a. Vinyl Chloride. A few commenters
objected to the inclusion of vinyl
'chloride in the TC. They suggested that
the constituent is already adequately
regulated under the Clean Air Act, the
Safe Drinking Water Act, the Toxic
Substances Control Act, and the Food,
Drug, and Cosmetic Act (for food
contact applications).
The commentsrs are correct in stating
that vinyl chloride and polyvtnyl
chloride are already regulated under
other environmental health and safety
statutes. However, none of these other
regulatory authorities addrsss the
specific problem of ensuring against
releases of vinyl chloride caused by the
improper management of solid wastes
containing this constituent. Most
importantly, none of the authorities
directly protect ground water supplies
from vinyl chloride contamination.
Because vinyl chloride is known to be
toxic to humans and has been detected
in ground water supplies, EPA believes
that regulating the constituent under
RCRA will add significantly to the
protection of human health and the
environment. An analysis completed as
part of the Regulatory Impact Analysis
(Ref. 8) of this regulation indicates that
large quantities of wastes currently not
regulated as hazardous contain
concentrations of vinyl chloride above
the regulatory levels. Therefore, the
Agency believes that RCRA regulation
under the TC is an important expansion
of the overall regulatory coverage of this
constituent which poses a threat to
human health and the environment.
b. Bis(Z-chlorosihyl) Ether, One
commenter questioned whether
incorporating bis{2-chloroethyl) ether
into the TC is appropriate, since only an
extremely limited quantity of the
constituent could potentially be released
into the environment. The commenter
noted that the constituent is used almost
exclusively as an intermediate in the
production of ionene polymers.
Moreover, it is handled primarily by a
single facility, which either recycles the
material or destroys it by
biodegradation prior to discharge under
a National Pollutant Discharge
Elimination System (NPDES) permit.
The Agency is not promulgating
standards for bis(2-chloroethyl) ether
today. As discussed in section III.E.2,a.7,
bis(2-ehloroethyl ether) is expected to
hydrolyze significantly during transport.
EPA does not have sufficient data to
address the formation and toxicity of
hydrolysis products. Thus, the Agency
expects to address appropriate
regulatory action for this constituent,
along with the other hydrolyzing
constituents, in a future Federal Register
notice.
c. Toxaphene. One commenter
questioned the need to include
toxaphene in the list of TC analytes. The
commenter argued .that toxaphene has
not been produced in the United States
for several years and that generators
should not be required to test their
wastes for "phantom" constituents that
are unlikely to be present.
EPA recognizes that toxaphene is no
longer produced domestically. However,
because previously generated toxaphene
wastes are still being managed in
treatment, storage, and disposal
facilities there is still a potential threat
to human health and the environment
from improper management of wastes
containing this constituent. Thus, wastes
containing toxaphene above the
regulatory level should be managed as
hazardous wastes.
Moreover, toxaphene has been
regulated as an EP constituent since
1980 and today's rule retains the existing
regulatory level. Thus, today's rule does
not alter any regulatory requirements
with respect to toxaphene. The Agency
does not believe that maintaining
toxaphene as a TC constituent is
unnecessarily burdensome to the
regulated community. The final TC rule
does not require solid waste generators
to test their wastes. Instead, generators
may continue to determine whether their
wastes exhibit the hazardous waste
characteristics by relying on their
knowledge of the materials and
processes that they employ (see 40 CFR
262.11(c)(2)). Accordingly, generators
who have reason to believe that their
wastes contain no toxaphene are not
specifically required to test for that
constituent.
d. Phenol. One commenter urged EPA
to delete phenol from the list of TC
constituents of concern because phenol
biodegrades under both aerobic and
anaerobic conditions.
The Agency is not including phenol in
today's rule because the steady-state
assumption used in the model to
calculate DAFs in this final rule may not
be appropriate for phenol. The Agency
will promulgate a TC regulatory level for
phenol at a later date.
The issue of biodegradation is
discussed in section III.E.2.a.9 as it
pertains to phenol and other
constituents.
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11812 Federal Register / Vol. 55, No. 61 / Thursday. March 29. 1990 / Rules and Regulations
e. PentachlorophenoL The Agency is
considering revisions to the regulatory
level for pentachlorophenol (PGP)
because new health data indicate that
PCP is more toxic than originally
assumed. Two studies of different
grades of PCP material were conducted
by the National Toxicology Program,
and the new data indicate that PCP is
carcinogenic in male and female mice
under the conditions of the bioassay.
These studies were used to support the
proposal to list additional wastes from
the wood preserving industry (53 FR
53282, December 30,1988),
The Agency is today .finalizing the
higher regulatory level for PCP although
the Agency expects that the regulatory .
level will decrease in the future. EPA
has determined that it is more prudent
to effect control at a higher level during
the period necessary to take comment
on the appropriateness of modifying the
TC level.
5, Specific Inorganic Constituents
As noted earlier, EPA did not propose
to add any new inorganic TC
constituents in the June 13,1988
proposal. Nevertheless, the Agency
received a large number of comments
addressing the eight metallic species
that were already covered by the EPTC.
The Agency also received many
comments on the possibility of
proposing TC regulatory levels for nickel
and thallium (mentioned in the June 13
proposal). The principal comments are
discussed below.
a. Silver. A number of commenters
urged EPA to delete silver from the list
of TC constituents of concern. They
pointed out that a variety of studies
have demonstrated that the chief effect
of silver on humans is argyria, a blue-
gray discoloration of the skin and
internal organs. The commenters also
stated that argyria is generally
considered a cosmetic effect, rather than
a health effect, because it does not
impair the functioning of the body,
While the commenters acknowledged
that free silver ions may be toxic to
aquatic life, they claimed that such ions
are rarely discharged into the
environment. Moreover, they argued
that even if such ions were discharged,
they would quickly be converted into
insoluble salts, such as chlorides,
sulfides. and phosphates. Finally, the
commenters asserted that deleting silver
from the TC list would be consistent
with current EPA policy. They pointed
out that the Agency has not proposed a
Recommended Maximum Contaminant
Level (RMCL) for silver in drinking
water, on the grounds that silver does
not cause adverse health effects.
EPA acknowledges that an RMCL
(now referred to as a Maximum
Contaminant Level Goal, or MCLG) has
not been proposed for silver because the
only known adverse effect from
exposure to silver is argyria. However,
the Agency has specifically requested
comments on whether it is appropriate
to consider argyria a cosmetic effect as
opposed to a health effect (see 50 FR
40979, November 13,1985). EPA believes
it would be inappropriate to remove
silver from the list of TC constituents
until this issue is resolved. If EPA
determines, within the scope of the Safe
Drinking Water Act rulemaking, that
silver does not pose a threat to human
health and the environment, the Agency
will consider proposing the deletion of
silver from the list of TC constituents.
b. Chromium, Several commenters
objected to the inclusion of total
chromium as a TC constituent of
concern. They argued that only
hexavalent chromium (Cr(VI)) has been
demonstrated to pose a threat to human
health and the environment. Although
they acknowledged that trivalent
chromium (Cr(IIIJ) can be oxidized to
hexavalent chromium under certain
conditions, they contend that such
conversion is unlikely to occur in ground
water environments. The commenters,
in fact, claimed that iron-bearing soils
are likely to effect the opposite
transformation, from CrfVTj to Cr(III).
Finally, they stated that even if the
oxidation reaction did occur, the
resulting Cr(VI) concentrations would
be so low as not to present a significant
danger to human health and the
environment.
EPA continues to believe that total
chromium concentrations should be
considered in determining whether solid
wastes qualify as characteristic
hazardous wastes. The Agency has long
been aware of the fact that trivalent
chromium is less toxic than hexavalent
chromium. Nevertheless, the Agency
also has been concerned that trivalent
chromium could be converted to the
hexavalent form under certain plausible
mismanagement conditions. It is for this
reason as well as the fact that the
NIPDWS was developed for total
chromium that the regulatory level for
chromium in the EPTC was originally
established on the basis of total
chromium concentrations (see 45 FR
33084, May 19,1980).
The Agsncy later proposed to amend
the EPTC so that it would apply to
hexavalent chromium rather than total
chromium (45 FR 72029, October 30,
1980; see also 48 FR 22170, May 17,
1983). This proposal was based on the
fact that trivalent chromium has
significantly lower migratory potential
than hexavalent chromium and is less
mobile if it does migrate from a waste
matrix. At that time, the Agency also
believed that there was little likelihood
that Cr(III) could oxidize to Cr(VI) under
most plausible types of improper waste
management
More recent evidence, however,
suggests that the conversion from
trivalent to hexavalent chromium may
occur in a number of environmental
situations (see 51 FR 26420, July 23,1986,
fn. 6). For example, Cr(III) has been
found to oxidize readily to Cr(VI) under
conditions found in many field soils.
This reaction is catalyzed by manganese
dioxide, which is commonly present in
both soils and sediments. Moreover, it
has been shown that water treatment
involving chlorination will effectively
transform Cr(III) to Cr(VI). The normal
presence of residual oxidizing capacity
in treated water is capable of
maintaining dissolved chromium in the
higher valence state (50 FR 46966,
November 13,1985). Thus, if trivalent
chromium is present in high
concentrations in well water,
chlorination can result in
correspondingly high concentrations of
hexavalent chromium at the point of
exposure (i.e., at the tap).
For these reasons, EPA's original
concerns regarding the potential for
trivalent chromium to be converted to
hexavalent chromium remain. Thus, the
Agency believes that the prudent course
is to regulate total chromium
concentrations under the TC. It should
be noted that because of this, the
Agency is considering proposing the
deletion of the exclusion for specific
chromium wastes that contain virtually
no hexavalent chromium [see 40 CFR
261.4(b)(6)(i}]. Such a change would
affect certain wastes from the leather
tanning and finishing industry (as well
as certain sludges from the production
of TiOi pigment using chromium-bearing
ores by the chloride process).
c. Nickel and Thallium. Several
commenters expressed support for
incorporating nickel and thallium into
the list of TC analytes. One commenter
emphasized that unless such a step is
taken, a major inequity will continue to
exist in the regulation of listed and
unlisted wastes that contain comparable
levels of nickel. Many other
commenters, however, objected to the
inclusion of nickel and thallium in the
TC. Most of these commenters doubted
whether either element poses a threat to
human health and the environment,
noting that neither one is on the Primary
or Secondary Drinking Water Standards
list.
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11313
EPA has decided not to add more
metals to the TC constituent list at this
time because technical issues remain as
to their subsurface fate and transport.
The regulatory levels for the toxicity
characteristic metals are not changed in
this rule (i.e., EPA is retaining the
regulatory levels set under the previous
EP) pending Further Agency validation
and study of the fate and transport of
metals. These validation and study
efforts are focusing on the development
of the metal speciation model
(MINTEQ).
The Agency is developing MINTEQ
for the evaluation of the mobility of
arsenic, banum, cadmium, chromium,
lead, mercury, nickel, selenium, silver,
and thallium in ground water, A
modified version of MINTEQ will fee
used in combination with a set of
generic ground water specifications and
subsurface conditions to determine
metal solubility limitations. EPA will
then use these results, in conjunction
with the subsurface fate and transport
model, to estimate dilution during
transport to the down-gradient exposure
point. (See discussion of the
development of the subsurface fate and
transport of metals at 51 FR1653,
January 14,1986.) The Agency is not
specifically proposing an approach for
evaluating the fate and transport of
metals in today's rule, but does expect
to propose, at a later time, DAFs specific
to metals, including nickel and thallium,
and will address comments relating to
the toxicity of nickel ar.d thallium at
that time.
C, Chronic Toxicity Reference Levels,
The Agency proposed to use chronic
toxicity reference levels (combined with
DAFs) to calculate leachate
concentration limits for individual
constituents; a waste containing
constituents equal to or above those
levels would be a hazardous waste
under the TC. Specifically, EPA
proposed to use the MCLs promulgated
as part of the National Interim Primary
Drinking Water Standard (NIPDWS),
where available, as the starting point for
establishing the regulatory levels for
each of the constituents. For those
constituents for which no MCLs had
been promulgated, the Agency proposed
Jo use oral Reference Doses (RfDs) and
Risk-Specific Doses (RSDs) to develop
chronic toxicity reference levels for the
noncarcinogens and carcinogens,
respectively. Because exposure to toxic
constituents can occur by multiple
pathways, the Agency also proposed to
apportion the acceptable health risk
level of each noncarcinogenic
constituent among the various possible
routes of exposure. The Agency solicited
public comment on: (1) Whether RfDs
and RSDs are appropriate to use when
MCLs are available: (2) the health levels
proposed for RfDs and RSDs; (3) the
associated risk levels; and (4) the
assumptions used to apportion exposure
to the different possible routes. The
Agency's decisions regarding the health-
related issues for which it solicited
comments are presented below.
1. Maximum Contaminant Levels
The original toxicity characteristic—
the EPTC (40 CFR 261.24)—used the
NIPDWS developed under the Safe
Drinking Water Act as the tcxicity
levels to derive the regulatory levels for
the eight metals, four insecticides, and
two herbicides then regulated. (For ease
of discussion, the acronym "MCLs" will
be used in subsequent sections to refer
collectively to both MCLs and the
existing NIPDWS.) EPA plans to
continue this approach in the expanded
TC for those constituents for which
MCLs are available.
A number of commenters expressed
support for the use of MCLs, when they
exist, as the starting point for
calculating regulatory levels for the TC.
Most of these commentars argued that
the MCLs provide adequate protection
of human health. These commecters
stated that MCLs are reliable,
scientifically defensible, and recognized
and understood by the general public.
Several commenters supported the use
of MCLs because factors relating to cost
and available treatment technology may
be considered along with health effects
in the development of the standards.
These commentera asserted that MCLs
represent a reasonable balance among
the factors EPA must consider, while
RfDs and RSDs are more limited. A
number of commenters also felt that the
use of MCLs provides a level of
protection consistent with other
regulatory programs.
In contrast, other commenters
supported the use of RfDs and RSDs as
the basis for the chronic toxicity
reference levels even when MCLs are
available for those constituents. These
commenters stated that health-based
levels are an appropriate starting point
for the regulation. Because the MCLs
consider other factors relating to
technical and economic feasibility in
addition to toxicity, they contend that
the RfDs and RSDs are preferable. Many
of these commenters also supported a
consistent approach for all constituents
regulated by the TC, rather than using
MCLs for some and RfDs and RSDs for
others.
Several commenters asserted that
because the MCLs were developed for
the purpose of regulating the
concentrations of constituents in treated
water "at the tap," it is not appropriate
to use the same standards for defining
hazardous wastes. Several commenters
also expressed concern that the MCLs
developed under tha Safe Drinking
Water Act ara potentially more stringent
than RfDs and RSDs. This concern was
most strongly expressed regarding
carcinogens, for which Maximum
Contaminant Level Goals (MCLGs},
previously referred to as Recommended
Maximum Contaminant Levels (RMCLs),
are set at zero, and MCLs are set at
technically achievable levels that most
clcsaly approach this zero goal.
EPA maintains that the MCLs. when
they exist, are the most appropriate
health criterion to use as the starting
point for developing the regulatory
levels. The exposure scenario developed
for the TC is based on ingesting
contaminated drinking water, and
because MCLs are developed for
regulation of drinking water, they
clearly are relevant. In addition, the
development of tha MCLs follows a
rigorous methodology in which all
available health information is
evaluated in establishing the MCLGs.
The MCLs are set as close to the MCLGs
as is feasible, and the Agency believes
that MCLs are protective of human
health,
It should be noted that EPA evaluates
the health risks that are associated with
various contaminant levels in order to
insure that the MCL adequately protects
the public health. For drinking water
contaminants, EPA sets a reference risk
range for carcinogens at 10~4 to 10~s
excess individual risk from lifetime
exposure. Most regulatory actions in a
variety of EPA programs have generally
targeted this range using conservative
models which are not likely to
underestimate the risk. Since the
underlying goal of the Safe Drinking
Water Act is to protect the public from
adverse effects due to drinking water
contaminants, EPA seeks to insure that
the health risks associated with MCLs
for carcinogenic contaminants are in the
general range of 10~4 to 10~s.
EPA acknowledges that use of MCLs
will, in some cases, result in chronic
toxicity reference levels that are lower
than those that would be calculated
using the RfD methodology. For
example, many of the non-carcinogenic
compounds have MCLs which are
approximately 10 to 20 percent of their
respective RfDs because exposure
sources other than contaminated
drinking water are considered in setting
the MCLs. On the other hand, the MCLs
for some of the constituents addressed
in the proposal are higher than the
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11814 Federal Register / Vol. 55. No. 61 / Thursday. March 29, 1990 / Rules and Regulations
levels that would be calculated using the
RSD methodology. An example of this
situation arises when the health criteria
are at such low levels that analytical
methods are not available to measure
these levels. In cases where the MCL is
higher than a purely health-based level,
the Agency notes that use of the MCL is
not inconsistent with today's rale since
the purpose of the rule is to identify
wastes that clearly pose hazards, not to
identify the lowest level of hazard.
However, regardless of whether they are
higher or lower than the levels
calculated using the RID or RSD
methodologies, EPA believes that MCLs
are the appropriate starting point for
developing regulatory levels for the TC.
for the constituents lacking MCLs,
EPA must rely on the available
methodologies to provide chronic
toxicity reference levels that are
scientifically defensible and protective
of human health. EPA believes that the
RfD and RSD methodologies meet these
two criteria. EPA also realizes that
inconsistencies will exist when different
methodologies are employed for
developing regulatory levels. The
Agency intends to evaluate newly
promulgated MCLs to determine on a
case-by-case basis whether the TC
regulatory level will change significantly
if the new MCL is used, and to revise the
regulatory levels, as appropriate. In the
long run, this should provide internal
consistency for the TC, as well as
consistency with other regulatory
programs.
Some commenten supported the use
of MCLGs as the basis for chronic
toxicity reference levels under the TC
because the MCLGs are based on health
effects alone, whereas the MCLs
consider other factors as well, such as
economic and technical feasibility.
EPA disagrees with the commenters
who stated that MCLGs are more
appropriate than MCLs for use in the
TC. MCLGs are nonenforceable health
goals for drinking water, which are to be
set at levels that would result in no
known or anticipated adverse health
effects with an adequate margin of
safety. The Agency has adopted the
policy of setting the MCLGs for probable
human carcinogens (Group A and B
carcinogens) at zero. If the Agency were
to use MCLGs rather than MCLs in the
TC, the regulatory levels for defining a
waste as hazardous would be based on
health criteria that, at least for
carcinogens, are more stringent than the
criteria used to set concentrations
acceptable for direct human ingestion of
drinking water. In addition, the
regulatory levels would be virtually
impossible to detect analytically. This
would mean that any waste that
contains detectable levels of
carcinogens would be hazardous
regardless of the potency of the
carcinogen or the risk presented by that
waste. EPA believes that this is an
inappropriate approach for the TC
because it would result in the regulation
of wastes which are not necessarily
hazardous.
2. Risk-Specific Doses for Carcinogenic
Constituents
For constituents for which no MCLs
have been established, EPA uses oral
RSDs to develop chronic toxicity
reference levels for carcinogens. The
RSD is an upper-bound estimate of the
average daily dose of a carcinogenic
substance that corresponds to a
specified excess cancer risk for lifetime
exposure. A predetermined risk level
and the oral carcinogenic slope factor
estimated by EPA's Carcinogen Risk
Assessment Verification Endeavor
(CRAVE] Workgroup or Carcinogen
Assessment Group (CAG) are used to
calculate the RSD.
The Agency proposed a risk level of
concern based on the weight of evidence
regarding carcinogenicity of each
constituent. Constituents classified as
known or probable human carcinogens
(Group A or B) were assigned a risk
level of 1 in 100,000 (i.e., 10" *), while
constituents classified as possible
human carcinogens (Group C) were
assigned a risk level of 1 in 10,000 (i.e.,
10~4).
The Agency received comments
regarding both the weight-of-evidence
approach for establishing risk levels and
the risk levels selected. In particular,
one commenter supported the Agency's
proposal, stating that a single risk level
is not appropriate for all constituents,
and that use of the weight-of-evidence
approach avoids making regulatory
decisions based on insufficient data.
Another commenter also supported the
use of weight-of-evidence to assign risk
levels, but stated that it is inappropriate
to regulate both known and probable
human carcinogens at the same level of
risk. Alternatively, a third commenter
asserted that the weight-of-evidence
approach is inappropriate because (1)
new information is constantly being
developed on the health effects of toxic
constituents, so the weight of evidence
is constantly changing, and (2) the
classification scheme does not take into
account the potency of the carcinogenic
risk.
The Agency also received specific
comments regarding both the weight-of-
evidence approach and the selection of
specific risk levels. Several commenters
addressed the risk level at which the
Agency proposed to regulate
carcinogens. Some comrnenters
specifically expressed support for EPA's
proposal to regulate Class A and B
constituents at a 10~5 risk level and
Class C constituents at a 10~4risk level.
One commenter stated that because the
procedure for developing risk estimates
is extremely conservative, the proposed
risk levels would not adversely affect
human health and the environment.
Another commenter noted that the
stated risk levels are estimates of the
upper confidence bound of risk and not
the maximum likelihood estimate; thus,
the actual risk to the public would be
less than the stated level.
Other commenters supported the use
of a 10" * risk level for all carcinogens.
These commenters argued that the use
of the proposed risk levels represents a
serious weakening in EPA's regulation
of carcinogens and is inconsistent with
other policies in effect in other EPA
programs,
With respect to the weight-of-
evidence approach, the Agency has
decided to establish a single risk level of
concern for all potential carcinogens
(i.e., the Agency will not assign a
specific risk level to a specific weight-of-
evidence carcinogenicity classification
for this rulemaking}. The weight-of-
evidence approach for classifying a
constituent as carcinogenic is based
primarily on the amount and quality of
data that are available rather than the
strength of the toxic response in animals
or humans. In effect, it is a qualitative
assessment that takes into account the
uncertainty in the data for determining
whether an agent is carcinogenic to
humans. This means that the actual
quantitative difference in risk between
an "A" and "B" carcinogen as classified
by the weight of evidence may either be
zero or may be orders of magnitude.
Thus, EPA believes that both the weight-
of-evidence and the strength of the toxic
response (i.e., potency) should be
considered in making regulatory
decisions within the context of the TC.
With regard to the specific risk level
chosen, the Agency has decided to set
the level for carcinogens (Groups A, B,
and C) at 1 in 100,000 (i.e., 10"5) for the
final rulemaking. Characteristics are
established at levels at which the
Agency has a very high level of
certainty that a waste which exhibits
these properties needs to be managed in
a controlled manner (i.e., as a hazardous
waste]. The Agency realizes that not all
wastes which exhibit properties at
concentrations below the regulatory
levels are necessarily safe for disposal
as nonhazardous wastes. Rather, those
wastes having properties lower than the
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11815
regulatory levels and which are
demonstrated to pose a hazard to
human health or the environment still
remain subject to waste-specific
evaluations under the hazardous waste
listing program. Wastes which are
determined to require controlled
management after consideration of the
factors identified in 40 CFR 261.11(a)(3)
(e.g., the nature of the toxic constituents,
toxicant mobility under various
environmental management scenarios,
volume of waste generated and potential
method of management) are then
specifically listed as hazardous wastes
and subjected to the appropriate RCRA
management controls. This reflects
EPA's philosophy, first articulated in
•May of 1980, that the characteristic
defines broad classes of wastes that are
clearly hazardous, while the listing
process defines some wastes that may
not exhibit the characteristics but are
nonetheless hazardous wastes (45 FR
33111, May 19,1980).
The chosen risk level of 10" * is at the
midpoint of the reference risk range for
carcinogens (10"* to 10""") targeted in
setting MCLs. This risk level also lies
within the reference risk range (10~4 to
10"6) generally used to evaluate
CERCLA actions. Furthermore, by
setting the risk level at 10~4 for TC
carcinogens, EPA believes that this is
the highest risk level that is likely to be
experienced, and most if not all risk will
be below this level due to the generally
conservative nature of the exposure
scenario and the underlying health
criteria. For these reasons, the Agency
regards a 10"5 risk level for Group A, B.
and C carcinogens as adequate to
delineate, under the TC, wastes that
clearly pose a hazard when
mismanaged.
3. Apportionment of Health Limits
EPA proposed to account for potential
exposure from sources other than the TC
scenario by apportioning the RfD-based
chronic toxicity reference levels. The
apportionment scheme effectively
reduced each such chronic toxicity
reference level to 50 percent of its
original value, (i.e., 50 percent of the
RfD). The Agency also proposed to
estimate environmental partitioning of
the apportioned health limits in air and
water according to a simplified
fractionation scheme using Henry's Law
Constants (HJ and octanol-water
coefficients (Kow) for individual
constituents. The Agency did not
propose to apportion the chronic toxicity
reference levels based on RSDs or
MCLs.
Several commenters addressed the
Agency's proposal to apportion the
RfDs. Commenters that criticized the
Agency's proposed apportionment
scheme argued that it was arbitrary,
overly conservative, and unnecessary.
Several commenters recommended that
EPA either use more realistic estimates
of exposure based on the available
constituent-specific data or not
apportion at all.
After a review of comments on the
proposed regulation and consideration
of the available data, the Agency has
decided not to apportion in this
rulemaking. Although the concept of
apportionment has some scientific basis
in that individuals are exposed to many
of the chemicals of concern through
more than one route of exposure and
from more than one source, the
implementation of the concept is very
difficult when adequate data on the
amount of exposure and/or health
effects from all routes of exposure do
not exist. Thus, due to the lack of
sufficient data to determine an
appropriate-apportionment factor for the
various constituents, the Agency now
concludes that its proposed
apportionment scheme cannot be
supported at the present time. Of course,
the proposed apportionment would deal
with uncertainty by erring on the side of
safety; nevertheless the Agency believes
that the conservative approach used to
deal with uncertainty in the
development of the RfD is sufficiently
stringent to define those wastes that
clearly pose hazards. This approach is
in accordance with the Agency's
treatment of noncarcinogens. The
Agency therefore will not apportion the
RfDs for this rulemaking.
A few commenters criticized the
Agency's proposed method for
fractionating the apportioned RfD
between air and water. These
commenters questioned the technical
basis of the Agency's approach and/or
recommended alternative schemes. The
Agency agrees with commenters that the
technical basis for supporting
fractionation as proposed is inadequate
to predict media-specific concentrations.
The Agency is exploring the
development of an appropriate model.
Thus, EPA has decided not to apportion
the RfD and not to fractionate the RfD
between air and water in this
rulemaking.
Other commenters addressed the
apportionment of RSDs for carcinogenic
constituents. Several of these
commenters agreed with EPA's decision
not to apportion RSDs, stating that doing
so would result in very low regulatory
thresholds for some constituents. The
commenters also pointed out that many
conservative assumptions are already
incorporated into the development of the
RSDs for carcinogens. Others
commented that RSDs should be
apportioned because humans are
exposed to these constituents by
multiple routes.
The Agency continues to believe that
it is not appropriate to apportion the
RSDs for carcinogenic constituents.
RSDs are estimated by a procedure that
must deal with unavoidable
uncertainties and is therefore
intentionally conservative. The Agency
stated in the preamble to the proposed
rule that a difference in dose of a factor
of 2 is still well within the margin of
uncertainty of the estimated RSD (51 FR
21567. June 13,1986).
Table C-l presents chronic toxicity
reference levels for the constituents in
today's rule. The Agency received a
number of comments on specific chronic
toxicity reference levels. In some cases.
EPA responded to these comments in
the notice of proposed changes to the
health levels on May 19,1988 (53 FR
18024). Other chemical specific
comments are addressed in the
background document (Ref. 3).
TABLE C-1.—CHRONIC TOXICITY
REFERENCE LEVELS
Constituent
Carbon tetrachloride
Chlordane . ... -
Chlorobenzene - ...
Chloroform...™. -
Chromium
o-Cresol
m-Cresol
p-Cresol
2 4-D
1 4-Dichlorobenzeoe
1 ,2-Dichloroethane
1 1-Dtchloroethylone
2 4-Dinitrotoluene _
Endrin
Heptachlor (and its hydrox-
ide).
Hexachloro-1 ,3-butadiene
Hexachlorcethane
Lead _
LJndane
Mercury
Methoxychlor
Methyl ethyl ketone
Nitrobenzene
Pentachlorophenol _
Pyridine
Selenium
Silver
Tetrachloroethylene
Toxaphene... .
Trichloroetnylene
2,4 5-Trichtoropheno) . ..
2,4,6-Tricnlorophenol
2.4.5-TP acid (Silvex)
Chronic
toxicity
reference
levtel (mg/
L)
005
1 0
0005
001
0.005
OC003
1
0.06
0.05
2
2
2
0.1
0.075
0.005
0007
0.0005
0.0002
0.00008
00002
0.005
003
005
0004
0 002
0.1
2
0.02
1
004
001
005
0007
0005
0.005
4
0.02
0.01
Basis
MCL
MCL
MCL
MCL
MCL
RSD
RfD
RSD
MCL
RfD
RfD
R'D
MCL
MCL
MCL
MCL
RSD
MCL
RSD
RSD
RSD
RSD
MCL
MCL
MCL
MCL
RID
RfD
RfD
RfD
MCL
MCL
RSD
MCL
MCL
RfD
RSD
' MCL
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11815 Federal Register / Vol. 55, No. 81 / Thursday, March 29, 1S90 / Rules and Regulations
TABLE C-1.—CHRONIC TOXICITY
REFERENCE LEVELS—Continued
Constituent
Vinyl chloride ..... . ...
Chronic
tenacity
reference
level {mg/
L)
0.002
Basis
MCL
Ail RSDs are calculated at the 1Q-§ risk level.
D. Use of Generic Dilution/Attenuation
Factors (DAFs)
In the May IS, 1883 supplemental
proposal, EPA requested comment on an
alternative strategy for setting DAFs in
the TC. The alternative involved setting
DAFs for these constituents in two
phases. The first phase would use a
generic DAF in a manner similar to the
existing EPIC, which uses a DAF of 100
for all EP constituents. In the second
phase, the Agency would further
address the manner in which the DAFs
are calculated and would either: (1)
Continue to use generic DAFs, (2)
employ a subsurface fate and transport
model lo develop constituent-specific
DAFs, or (3) use some combination of
the two approaches. The Agency also
specifically solicited comment on the
use of a generic DAF of 100 or 500 in the
first phase.
Many commenters recognized the
need to expeditiously promulgate the
TC; however, most opposed the two-
phased approach, arguing that it would
cause undue economic harden by: (1)
Forcing industries to design new
treatment programs for one group of
wastes at certain regulatory levels, and
a few years later to redesign in order to
accommodate new levels and wastes,
aad (2) over-regulating certain chemical
substances under the first generic-DAF
phase that may then not be regulated
under the second phase. Some
commenters were concerned, on the
other hand, that EPA would set the
generic DAFs so high (to avoid
overregulalion) that some substances
would be under-regulated.
Most commenters opposed the use of
generic DAFs and urged EPA to retain
the constituent-specific modeling
approach. These commenters argued
that a generic DAF would be arbitrary
and not scientifically defensible; that
use of the generic DAFs would violate
the statutory requirements to develop a
process that accurately assesses
leaching ability and differentiates
between hazardous and nonhazardous
wastes; and that the diversity in dilution
and attenuation attributes across the
constituents would cause any generic
DAF to either severely under-regulats or
severely overregulats a large number of
the constituents. Even those few
commenters who supported the two-
phased approach recommended that the
Agency move rapidly to-the second
phase and employ the modeling
approach to set DAFs.
EPA acknowledges that the problems
noted by the commenters are important
ones. The Agancy requested comment
on the generic DAF approach because of
the likelihood that the issues
surrounding the proposed fate and
transport model for establishing
constituent-specific DAFs would not be
resolved in a timely manner. Since the
Agency has bean able to address the
concerns regarding the subsurface fate
and transport model for the constituents
identified in today's regulation, the
Agency has decided to use the model to
develop DAFs. Consequently, the DAFs
set in today's rale for nonhydroiyzing
constituents for which the steady-state
solution is appropriate are not viewed
by EPA as interim and are supported by
the subsurface fate and transport model.
The Agency intends to establish DAFs
for constituents not addressed in today's
rule on a constituent-specific basis, and
regulatory levels for those constituents
will be proposed or promulgated (as
warranted) at a later date.
E. Application of a Subsurface Fate end
Transport Model
1. Introduction
On June 13,1S86, EPA proposed an
approach (see 51FR 21648) for
estimating regulatory concentration
levels in a waste leachate using chronic
toxicity reference levels, combined with
constituent-specific dilution/attenuation
factors (DAFs) derived from the
application of a subsurface fate and
transport model. The model
(EPASMOD} was first described for
public comment on January 14,1986 (51
FR 1602).
A DAF represents a reduction in ths
concentration of a constituent expected
to occur during transport through ground
water from the bottom of a disposal unit
to a drinking-water source. In rssponsa
to the proposal and supplemental
notices (see Section II, Table II.1). the
Agency received numerous comments
on the subsurface fate and transport
model used for the calculation of DAFs.
This section describes the different
proposals related to the use of the
subsurface fate and transport model, the
modifications to the model in response
to public comments, and the results
obtained with the use of the modified
model.
o. June 13i 1988 Proposed Rule (51 FR
21648). The Agency's June 13,1386
proposal used a subsurface fate and
transport model (EPASMOD) to
calculate specific DAFs for each of the
44 organic hazardous constituents (see
Table E-l). The DAFs for each
constituent were calculated using the
modal, incorporating compound-specific
hydrolysis and soil adsorption data
coupled with parameters describing the
subsurface environment (e.g., ground
water flow rate, hydraulic conductivity
of the aquifer, ground water pH, etc.).
The Agency proposed modeling a
scenario of waste mismanagement at a
subtitle D municipal landfill. Data were
incorporated in the model using a monte
carlo simulation.
TABLE E-1.—DILUTION ATTENUATION FACTORS FOR TOXICITY CHARACTERISTIC ORGANIC CONSTITUENTS
Constituent
AcrylorsiWie „ .. . .. ..
Serseno _ .. . „._ .
Bfs(2-cfHoroethyl)ethef .. . „
Carbon dtsuHide .... -...-. . ... .
Carbon tetrachloricte *..«
ChlOfostie .. ..... . ..... ... .. ...... .. „ . ...
Ghiorcbenzsne ,.,...... ...... ..... „.. . „ ....
Chloroform ... ....... . ...„ * , ..
o-Cresol . ..... .. .. „...,.. . .... .. ..
nvCfesol . . . .. . .
p^?esoi , ....... ,™.™..™ .
2,4-0.....
1 2"Dichlorobenz9ne ..... .... « ....... ~
LOG
KOW1
007
213
1 04
21S
236
7 548
28?
1 36
2.13
215
2.15
2.70
3.56
Ka"
>1/yr
NHYF *
NH1
NH ....
NH
NH
NH.. „ .. .
NH .
NHYF
NHYF
NHYF
NHYF
NH
Kb"
>1/yr
NHYF
NH
>10/yr.._
NH
>10/yr
lE-6/hr__,
0 23/hr
NHYF
NHYF
NHYF „
NHYF
lE-5/hr.._ „
Kn»
> 1 /yr
NHYF
8E-5/hr „
NH
NH
NH ..
NH. _
3E-9/hf
NHYF
NHYF
NHYF
NHYF _
NH
D/A
factor3
144
144
14 4
14.4
14.4
14 4
144
144
14 4
14 4
144
144
14 4
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Federal Register / Vol. 55, No, 61 / Thursday, March 29, 1990 / Rules and Regulations
11817
TABLE E-1.—DILUTION ATTENUATION FACTORS FOR TOXICITY CHARACTERISTIC ORGANIC CONSTITUENTS—Continued
Constituent
1 *2-OiCfllorQGtftan@ ........ - ...
1 1 -Dchloroethylene
Hepiachiof (and its hydroxide)
Mdxaf^lnro^^tadiffnii ,,,,,. . -,.Ir,-,. ,,„,, . , nln. , --,„.
Hsxacrtloroethane „ „ m .„. .. „.„.
Lindans . .... ,. ~.
Methoxychlor .. .......... .....
Metnyteoe chloride. ». ...... «—.«. ....... . ~.~
Methyl ethyl ketone «. . .
'Phenol ._
1,1 1 ,2-TstrachlOfoethane ..... .. ~ .... ..~.
1 i ,2,2-Tetrachlof oethans .... ..... •
Tetrachlofoethylene . .................
234 6-Tetracntor ophenol .~. .. .
Toluene .. „,..., „. . „
Toxaphene . , . .... , .„ „...„ .... .
1,1,1-Trichlofoethane -. - - .....
1,1,2-Trichloroethane _ _ ..;
TrichloroetrsylefHi „ „,„. .... , .„ ,
2,4,6-Trichloraph@nol «. ~™. _*. „. ~ ... . .... .
2,4,5-TP (Sitvex) „
Vinyl cfHorida . _
LOG
Kow >
358
1.40
2 13
230
'3.54
T4.6i
6.42
4.24
4.22
0.74
3.40
T4.30
1.28
0.30
1.90
5.06
1.49
0.68
2.81
2.42
3.03
4.33
2.82
*5.30
'2.50
1.91
2.28
386
358
3.45
1.38
Ka*
NLFG "
NH
NLFG _,„
NLFG
> 1 /yr
NLFG
<1/yr
NLFG ....
>l/yr
> 1 /yr ,.._
>1/yr._
NH
NH „
NLFG
NLFG._ _.
NH
NHYF
NLFG
NH _
NH
NLFG
NH
NHYF
NH.™
NH
NH... _.
NLFG
NH. „
NH _
NLFG
NH ;
Kb"
NLFG
NH
NLFG .... ,__
NLFG.
>1/yr
NLFG „_
<1/yr
NLFG
> 1 /yr
>1/yr _
>1/yr _
1,4/nr
NH
NLFG _
NLFG „.
>1E-4/hr _
NHYF .
NLFG
1.3/hr
2.6E-»-3/hr
NLFG
1E-5/hr
NHYF
> to/yr
NH
13/hr...,
NLFG
1E-5/hr
1E-5/hr
NLFG... ....
1E-5/IW _.
Kn»
NLFG
7.2E-5/hr
NLFG _....
NLFG
>1/yf
NLFG.
«J 1 /yr
NLFG
>1/yT
>1/yr,.
>1/yr
7.5£-S/hr
1.18E-8/hr _
NLFG
NLFG
NH
NHYF
NLFG
2.2£-7/rtf
NH
NLFG
NH
NHYF
NH
1.1£-4/hr
4.3£-7/hr .
NLFG
NH
NH . ._... __
NLFG .........
1E-7/hr., _.
0/A
factor 3
14.4
75.0
144
14.4
14.4
14.4
14.4
14.4
14.4
14.4
14.4
14.4
14.4
14 4
14.4
14.4
14.4
14.4
14.4
65.0
14.4
14 4
144
14.4
150.0
20.0
14.4
14 4
14.4
14.4
| 14.4
!
1 Logarithm o) ihe octanol/water partition coefficient
* Acid, base and neutral hydrolysis rate constants.
' Dilution/attenuation (actor derived from ground water transport system.
4 NHYF m No Hydrolyzable Functional Group.
» NH = Negligible Hydrolysis.
• NLFG = No Liable Functional Group.
' Estimated value.
In the monte carlo simulation, values
for each parameter are based upon the
frequency distribution for each
parameter (where such data exists)
rather than the selection of a single
value for each parameter. The model is
then run a sufficient number of times
(typically several thousand] to produce "
the frequency distribution of the model's
output. This overall frequency
distribution is, effectively, a
combination of the frequency
distributions for each individual
parameter. This approach avoids the
compounding effects of conservatism
inherent in choosing single, reasonable-
worst-case values for each parameter.
Monte carlo simulation was chosen as
the preferred method to analyze the full
range of possible environmental
conditions for the land disposal
scenario. The wide range of
environmental conditions (e.g., ground
water velocities, pH, temperatures,
exposure point locations) that can exist
in locations across the nation where the
wastes in question may be disposed
precludes a priori specification of a
reasonable worst case for these
parameters. Another important reason
to use the mor.te carlo method is the
very complex manner in which the many
model variables and parameters
interact. Unless many [hundreds to
thousands) combinations of variables
are investigated, it is simply not possible
to anticipate those physical settings that
lead to unacceptably high exposure
levels. Accordingly, the monte carlo
method was chosen to ensure that a
conservative but not physically
unrealistic or impossible analysis was
completed. .
The EPASMOD, as described in the
proposed rule, was based on a number
of key assumptions pertaining to the
features of ground water flow,
properties of the porous medium, and
the behavior of hazardous wastes in
ground water. These assumptions
included the following:
• Saturated soil conditions (no
attenuation of chemicals in the
unsaturated zone);
• Flow regions of infinite extent in the
longitudinal direction, semi-infinite
extent in the lateral direction, and finite
in the vertical direction:
• Aquifer can be characterized by
homogeneous and isotropic properties
and the aquifer thickness is constant;
• Ground water flow is uniform and
continuous in direction and velocity;
• Degradation is limited to hydrolysis
and the by-products of hydrolysis are
assumed to be nonhazardous:
• Contaminants follow a linear
equilibrium adsorption isotherm;
• An infinite source supplies a
constant mass flux of chemical into ihe
aquifer;
• Recharge due to precipitation
supplies water to the disposal unit and
the aquifer;
• The ground water upstream of the
disposal site is initially free of
contamination;
« The receptor well is directly in line
with the source and the ground water
flow direction;
• The receptor well is located 500 feet
from the unit; and
* Hydraulic conductivity does not
vary with temperature.
In the June proposed rule, the Agency
also proposed using the 85th cumulative
percentile level of the back-calculated
dilution attenuation factors obtained
using the monte carlo simulation
technique as an appropriate regulatory
level for the TC. Selection of this level
means that downgradient
-------
11818 Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations
concentrations will not exceed the
allowable health-based concentrations
in more than 15 percent of all possible
analyzed settings of subtitle O disposal
units. (This proposal referenced other
proposals dealing with the ground water
transport model, such as the January 14,
1986 Land Disposal Restrictions notice,
and notices published by the delisting
program; relevant comments received in
response to those notices are also
discussed in this rulemaking.)
b. August 1,1988 Notice of Data
Availability and Request far Comments;
Supplement to Proposed Rule (52 PR
28882). On August 1,1988, the Agency
presented new data related to subtitle D
municipal landfills, soil characteristics,
and chemical-specific hydrolysis rates
to be used with the subsurface fate and
transport model to calculate DAFs for
each of the organic constituents in the
TC. Th-3se new data became available
to the Agency after the June 13,1988
proposal. The August 1,1988 Notice also
requested comments on several major
revisions to EPASMOD that were being
considered by the Agency, subsequently
referred to as EPA's Composite Model
for Landfills (EPACML). As a result of
comments received on the January 14,
1986, and June 13,198S proposals, as
well as the August 1,1988 Notice, the
Agency has used EPACML to support
the choice of appropriate DAFs for this
rulemaking.
These modifications and data are
described in greater detail below
(section III.E.2). The reader is referred to
the Response-to-Comments Background
Document for the Subsurface Fate and
Transport Module (Ref. 1), which
presents, fa detail, each of the technical
issues addressed in the public comments
on the model and the Agency's response
to these issues.
2. Modifications of the Subsurface Fate
and Transport Model (EPASMOD) in
Response to Comments
In today's rule, the Agency has used
EPACML to estimate the attenuation
and dilution of specific constituents
during their migration through the
unsaturated zone beneath a municipal
landfill and their transport through the
saturated zone to a potential drinking
•vater source (exposure point). EPACML
Accounts for dispersion in the
longitudinal, lateral, and vertical
Jirections; one-dimensional steady and
miform advective flow; sorption; and
;hemical degradation from hydrolysis.
The major enhancements that were
nade to EPASMOD to produce
-3PACML, the substantive comments
hat led to these changes, and important
assumptions made to develop analytical
solutions are described in subsection (a)
below.
In addition, the Agency used the
EPACML model to corroborate its
conclusions on dilution/attenuation
factors for surface impoundments. For
this exercise, data inputs typical of
surface impoundments rather than
landfills were used. These procedures
are described in subsection (b) below,
a. General Modifications—i.
Unsaturated Zone. The EPASMOD
model discussed in the June 13,1988
proposal assumed that there was no
unsaturated zone (i.e., the bottom of the
landfill is directly connected to the top
of the aquifer). Several commenters
stated that the assumption that the
facility is located directly at the top cf
the saturated zone is unrealistic because
an unsaturated zone usually exists
above the aquifer and that retardation,
dilution, and degradation effacts in the
unsaturated zone should be considered,
The commenters also suggested that,
when incorporating the unsaturated
zone, the depth to the water table
should be incorporated as part of the
monte carlo analysis.
The Agency is in agreement with the
commenters and has now included an
unsaturated zone as part of the
subsurface model. The Agency believes
that this modification to the model is
reasonable, based in part on a survey of
existing municipal landfills that
indicated that an unsaturated zone
exists beneath 95 percent of the
surveyed landfills. Incorporating an
unsaturated zone into the model
accounts for any retardation and •
degradation of chemicals in the
unsaturated zone and provides a more
realistic scenario.
To account for the unsaturated zone,
the Agency developed unsaturated zone
flow and transport modules and
implemented them using the monte carlo
(probabilistic) framework that has
already been used in conjunction with
the saturated zone modeling approach in
EPASMOD; these unsaturated zone
modules are incorporated into EPACML
The input concentration to the
unsaturated zone transport module of
EPACML corresponds to the leachate
concentration at the bottom of the
landfill.
The unsaturated zone model was
reviewed by EPA's Science Advisory
Board (SAB). The SAB endorsed the use
of the model for applications for the
development of regulations; however,
the SAB recommended that it not be
used for site-specific applications
because the model has limitations
imposed by the simplifying assumptions
(those necessary for regulatory use), and
the limitations of the use of site-specific
data. The unsaturated zone model
consists of two modules: a flow
component and solute transport
component. These two components were
developed in a form to allow for their
incorporation in the monte carlo
simulation. The major assumptions and
consequences of the flow module are:
• Flow is steady in the vertical
direction, and lateral and transverse
movement of the leachate is negligible.
Because there is little or no lateral flow
in the unsaturated zone, these
assumptions are appropriate. In any
case, this procedure will tend to
maximize the concentration of laachate
leaving the unsaturated zone and
therefore represents a conservative
assumption.
• No vapor phase or immiscible
liquid flow occurs, and the water phase
is the only flowing material. EPA
acknowledges that some constituents in
some situations may undergo phase
shifts and be emitted in vapors. Because
this rule is essentially directed to risks
from drinking water and because of the
uncertainties in accurately computing
emissions and their relationship to the
currently available leaching tests, this
conservative assumption was adopted.
Under certain conditions, particularly
very high constituent concentrations,
immiscible liquid flow can occur. For
such situations, the model's inability to
account for the immiscible flow
condition may lead to higher
dowr.gradient concentrations (i.e., the
model would underestimate the receptor
well concentrations).
• Flow is isothermal (not affected by
temperature variations). In reality,
temperature variations at any given site
are not dramatic because the source of
infiltrating liquid is precipitation. Thus,
this assumption is not expected to
influence the results to any appreciable
degree.
• Effects of variations in the
unsaturated zone hydraulic properties
caused by alternating moisture
conditions are negligible (i.e., hysteresis
effects). Many soils, especially the more
porous ones for which infiltration rates
are high, do not present important
hysteresis effects. In other cases, little
and often no data are available to
characterize the effects. Failure to
include hysteresis is not expected to
affect the results to any appreciable
extent.
• The flow field is uniform and
continuous in direction and velocity.
Precipitation-driven infiltration can be a
dynamic process where much of the
vertical movement occurs during
relatively short periods of time. Time-
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Federal Register / Vol^55, No. 61 / Thursday, March 29. 1990 / Rules and Regulations
11319
averaged values of infiltration derived
from dynamic water balance
calculations (as described in the
Background"Technical Support
Document) are often used to enable
solution of analytical, steady-flow
models, The unsteady-flow conditions
could lead to higher downgradient
concentrations than predicted by
EPACML. However, the effect is
expected to be significant only for
rapidly degrading constituents. For the
constituents regulated in this rule, no
appreciable impact is expected because
none of the constituents are expected to
hydrolyze to any significant extent
during transport.
» The unsaturated zone is
•homogeneous and isotropic. This
assumption is typically required to
enable mathematical solutions
amenable to exhaustive sensitivity
analyses and monte carlo
implementation. In any one application
(one model ran) of this assumption, the
result can either under- or over-predict
downgradient concentrations. The
monte tiarlo implementation, however,
results in a very wide range of possible
conditions, and thus the total analysis,
when taken together, accounts for a
wide variety of unsaturated zone
conditions. ,
The major assumptions and
consequences of the unsaturated zone
transport module are:
• Chemical transport is vertical:
lateral and transverse movement of the
chemical is negligible. This follows from
the first assumption for the flow module
described above.
• Chemical sorption is modeled as a
reversible, linear equilibrium process.
This is a standard modeling assumption
which ii accurate for systems having
relatively low solute concentrations, and
conservative at higher concentrations.
* Degradation is limited to
hydrolysis. This assumption was made
to be consistent with the similar
approach adopted for the saturated
zone. Thus, the model includes only
those degradation mechanisms that can
be reliably characterized in laboratory
studies of each individual constituent.
This assumption remains a major
conservative component of the overall
model.
• Chemical transport in the vapor
phase has been assumed to be
negligible. This follows from the second
assumption for the flow module
described above.
• The unsaturated zone transport
model is solved for the steady-state
condition. This is a conservative
assumption that has been investigated
for its impact on all the originally
proposed constituents. The extent to
which this assumption is appropriate is
discussed in section HI,E,4(b](iii),
The details of the unsaturated zone
module are provided in the background
documents (Ref. 1, 9], which also
describe the data sources and analyses
that were performed to obtain the data
distributions,
//'. Source Characterization. In
EPASMOD, the input leachate to the
saturated zone was assumed to be
instantaneously mixed in the vertical
direction over a pre-specified depth of
source penetration, and the
concentration in the leachate was equal
to the maximum source contaminant
concentration in the saturated zone
below the facility. Mass balance
considerations required that the lateral
extent of the leachate directly
underneath the facility be adjusted to
ensure that leachate was neither gained
nor lost in the transition from the facility
(or unsaturated zone) to the aquifer. A
number of commenters criticized the
treatment of the source. A major
concern was that the method was
inadequate because of an overly
conservative assumption, which equated
the concentration of the contaminant in
the saturated zone to the landfill
leachate concentration. Thus,
commenters argued that EPA had not
given adequate consideration to mixing
and dispersion under the landfill. The
commenters also pointed out that this
treatment of the source could result in
modeling physically unrealistic
boundary conditions (e.g., by modeling a
source of small cross-sectional area with
a very large width of the Gaussian
source, and vice versa).
The Agency agrees with the
commenters that the method used to
characterize the source-boundary
conditions for the saturated zone
transport needed to be improved. Thus,
the method has been revised to consider
the mass balance requirements,
geometrical configurations, and physical
processes that are occurring in the.
mixing zone below the facility and
within the saturated zone. An important
characteristic of the revised method is
the plume restriction in the lateral
extent. That is, the method no longer
permits physically unrealistic situations
where the plume source width exceeds
the facility width. In addition, the
current method of computing the source-
boundary conditions represents the
mixing and dilution effect on the
leachate below the source and ensures
that the concentration of the
contaminant in the saturated zone will
be less than or equal to the landfill
leachate concentration.
Hi. Treatment of Dilution from
Recharge. In EPASMOD, the dilution
effect of ground water recharge on
contaminant transport in the saturated
zone was taken into account by
including recharge as a dilution term in
the governing equation. Dilution of
leachate concentrations from recharge
was calculated by dividing the
infiltration [recharge) rate by the source
penetration depth. A number of .
commenters were concerned that the
influence of recharge on the ground
water flow field had not been properly
accounted for in the model. In addition,
several commenters alerted the Agency
to an error in the equation used to
evaluate the recharge dilution
parameter.
In response to these comments, the
Agency has modified the model to
calculate dilution from recharge by
dividing the recharge rate by the total
saturated thickness of the aquifer, the
aquifer porosity, and the effective
retardation factor in this zone. This
revision represents a more realistic
assessment of the dilution potential of
recharge by considering changes in the
entire volume of water in the
contaminated aquifer and the
effectiveness of contaminant and
recharge flow and mixing in the aquifer.
The Agency recognizes that recharge
effects on ground water flow fields are
not rigorously considered in the model
and that the assumption of uniform,
constant, horizontal ground water
velocity neglects the possible effects of
local mounding of the water table
underneath the land disposal unit.
However, the constant velocity
assumption can be interpreted as an
averaging of the velocity field over the
spatial area affected by recharge; in .
addition, the uniform, horizontal flow
assumption was necessary to make the
three-dimensional transport equation
analytically solvable. The effect of
recharge on ground water velocity is
difficult to account for directly in the
model. To assist in the analysis, EPA
has conducted a sensitivity analysis
comparing EPACML results with
recharge effects as predicted by a two-
dimensional numerical model that
rigorously accounts for recharge. The
results (which can be found in Ref. 9)
indicated that as long as recharge values
are significantly less than the natural
flow velocity, there was no major effect
on the ground water flow fields. Based
on this analysis, and on evidence of
typically low rates of ground water
recharge, the Agency believes that the
revised treatment of the dilution effect
from recharge is reasonable. In addition,
the error, as pointed out by several
commenters, in the equation used to
evaluate the recharge dilution
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11320 Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1930 / Rales and Regulations
parameters was corrected, and the
correction is included in EPACML
iv. Location of the Receptor Well. In
EPASMOD, the receptor well was
assumed to be located downgradlent
from the landfill along the centerline of
the plame (direction of ground water-
flow} at a fixed distance of 500 feet
(152.4 m). In addition, the receptor well
was assumed to be tapping water from
the top of the aquifer, and no mixing of
water in the well or effects of drawdown
in the well were considered in-
EPASMOD.
Many commenters argued that the
assumptions concerning the location of
the receptor well were too conservative
and suggested that well locations should
be considered in a probabilistic manner
as part of the monte carlo simulation in
the model. These commenters noted that
well locations other than on the
centerline should be considered. Several
ccmmenters also stated that the tvell
locations should not be restricted to
lying within the areal extent of the
plume and suggested that wells located
outside of the plume should be
considered in the calculation of the
dilution/attenuation factors.
The Agency agrees that the proposed
location of the well was unrealistic and
that affected wells located at paints
othsr than on the centeriine should be
considered. Therefore, the model now
considers well locations anywhere
within the areal extent of the
•contaminant plume. In order to
incorporate these locations, a
distribution of distances to
downgradient wells was developed
based upon a subtitle D municipal
landfill sur/ey (Ref. 6). These distances
were used as part of the monta carlo
analysis. Also, to incorporate locations
other than on the centerline, the Y
values (see Figure 1} were selected
randomly over a 180° domain but the X-
Y pairs were constrained to values that
were located within the areal extent of
the plume.
EHLUNQ CODE S5CO-KMI
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Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations 11821
FIGURE 1
A SCHEMATIC OF THE HASTE FACILITY SOURCE BOUNDARY
CONDITION AMD LEACHATE MIGRATION THROUGH THE
UNSATURATED AND SATURATED ZONE
PLAN VIEW
SECTION VIEW
V T
Unsaturated Zone
Aquifer
Monitoring
-.Well
Water Table
8
*VvA
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11822
Federal Register / Vol. 55. No. 61 / Thursday. March 29. 1990 / Rules and Regulations
The Agency disagrees with those
commeriiers who stated that well
locations outside of the areal extent of
the plume should be considered. The
purpose of the Toxicity Characteristic is
to answer the question "if the
management of this waste continues to
be uncontrolled, what are the
consequences in terms of human
exposure via ingestion of contaminated
drinking water?" In performing the
exposure assessment to answer this
question, the Agency believes it
appropriate to consider only wells that
could be affected by the disposal of the
waste. Wells that could not be affected
by the migration of constituents from the
wastes dre obviously irrelevant to the
exposure assessment and, thus, not
considered.
Commenters also stated that it was
unrealistic to assume that the well
tapped water from only the uppermost
point of the aquifer. These commenters
stated that, in practice, the intake
portion of a well is located below the
top of the water table and that mixing
and drawdown will occur.
The Agency agrees that the proposed
well intake location was unrealistic and
that it ignored the effects of vertical
mixing and the possibility that the well
intake would likely be at some point
other than the top of the aquifer. In
response, the assumption has been
modified to consider well intake at any
point throughout the depth of the
aquifer. This modification largely takes
into account the above-described mixing
and drawdown effects.
In determining how to account for
well drawdown more realistically in the
model, the Agency considered the
mechanics of well construction.
Generally, wells are screened from near
the top of the aquifer to a sufficient
depth (into the aquifer) to allow delivery
of the needed water supply. Thus, the
ranges of values for the length of the
screens and their locations relative to
the top of the aquifer are very large. In
recognition of this variability, especially
in screen length, the Agency has
employed a simplifying assumption that
the concentrations of constituents at
various depths of the aquifer represent
the concentrations at the exposure
point. That is, the concentration of
constituents in the water drawn from
the well is assumed to be equal to the
concentration of the constituents at the
depth which is seiscted in the monte
carlo simulation. (The '.veil depth is
randomly selected from all points within
the vertical range of the aquifer's
thickness.)
To evaluate the model's sensitivity to
this assumption, the Agency evaluated
the case in which wells were assumed to
be screened from the top of the aquifer
to the monte-carlo-selected depth. The
exposure point concentration was then
calculated as the average concentration
over the screened depth. This case is
considered to be more representative of
the most likely well design, although in
many cases the well will not extend to
the bottom of the aquifer nor will it
always be constrained to intersect the
plume as is implemented in the monte
carlo simulation. This scenario is
considered to be more conservative (i.e.,
resulting in lower DAFs) than the
EPACML-as-implemented scenario.
When one considers other possibilities
like well location factors up gradient
and outside the plume, the range of
DAFs from the two scenarios can be
expected to bound the actual exposures.
In evaluating the model predictions
over the range of cumulative frequency
values considered in interpreting the
model's results in today's rule (see
Section III£.4—DAF Evaluation), the
dilution/attenuation factors for the two
scenarios are not sufficiently different to
warrant separate conclusions regarding
the appropriate value for use in today's
rule. (Model results for the two
scenarios are compared in the
background document for the model—
Ref. 9.)
v. Dispersivity Values. Dispersivity
controls the degree of spreading of
dissolved contaminants in the
subsurface. The saturated-zone fate and
transport model includes dispersion in
the longitudinal, transverse (horizontal),
and vertical directions. The model thus
requires values of the longitudinal.
transverse, and vertical dispersivities in
the saturated zor.e. In EPASMOD, the
distance x from the downgradient edge
of the landfill to the receptor well was
assumed to be fixed at 152 m (300 feet).
Consequently, fixed values of the
longitudinal and transverse
dispersivities were used in the model.
The values of vertical dispersivity were
assumed to vary uniformly.
Several commenters criticized the
assumption that dispersivity values did
not vary and reflected only the fixed
distance selected in the model. They
also suggested that the ratio of
longitudinal to transverse dispersivity
used in the model was too low. The
basis of their comments is that field
values of dispersivities have been
shown to depend on, and usually
increase with, the travel distance.
The Agency agrees with the
commenters and now calculates the
three components of dispersivity based
on a detailed analysis of data gathered
from field tests (the model background
document [Ref. 9] presents a detailed
discussion on dispersivity values and
provides references to the field data).
The Agency believes that the revised
approach, reflecting the distance-
dependent nature of the dispersivity
values and different relationships
between the dimensional dispersivities,
is more realistic and consistent with the
available data.
EPACML also requires the
specification of a dispersivity parameter
for transport in the unsaturated zone.
Since the transport equation in the
unsaturated zone is. one-dimensional,
only the longitudinal (vertical)
dispersivity value is required and is
calculated as a function of the distance
(i.e., the depth to water table) traveled
in the unsaturated zone.
vi. Hydraulic Conductivity. In
EPASMOD, the value of hydraulic
conductivity in the saturated zone was
estimated using the Kozeny-Carmen
(Ref. 9) expression, which relates
hydraulic conductivity to porosity, the
mean particle diameter of the aquifer
material, and the fluid properties
(density and viscosity). This relationship
was based on an assumed ground water
temperature of 15 degrees C and did not
reflect changes in the fluid properties
with temperature.
Commenters expressed concern with
this assumption because ground water
temperature is known to typically range
in temperature from 4 degrees C to 30
degrees C. A few commenters also
expressed concern regarding the validity
of using this empirical relationship.
In response to these comments, the
Agency generalized the expression to
include the effects of changes in
temperature on fluid viscosity and fluid
density. That is, the fluid viscosity and
density are now considered as functions
of temperature rather than as constants.
The Agency realizes that the hydraulic
conductivity also depends on physical
properties, such as grain shape, grain
size distribution, packing, and tortuosity
of the porous media. Porosity
measurements reflect the composite
result of these textural characteristics
on the structural arrangement of the
porous media. The range of porosity
values derived in EPACML indirectly
reflect the impact of these properties.
Therefore, in view of the Agency's
objective to represent the wide
variations expected from site to site, the
Agency decided to retain the Kozeny-
Carmen equation, except for the
modification described above.
vii. Hydrolysis. As already discussed
in section III.E.2.. the EPACML model
accounts for reduction in constituent
concentrations due to hydrolysis. This
results in higher DAFs for constituents
that hydrolyze during transport than for
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Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations 11823
constituents that do not. The DAF
predicted by the model for some of these
constituents ranges up to one million.
Thus, in some cases, wastes would not
be considered hazardous unless they
contain large amounts of these
toxicants; still, in other cases, no
amount of toxicant in the waste would
define it as hazardous under this
scenario. Therefore, the Agency did not
believe it appropriate to include these
constituents in the TC (see Table E-2 for
list of constituents that appreciably
hydrolyze). Furthermore, the model does
not account for the degradation products
that are produced as the original
constituents hydrolyze. That is, while
the decrease in the concentration of the
original constituent is accounted for. the
resultant increase in concentration of
the hydrolysis products is not. Several
commenters stated that the toxicity and
transport of the potential hydrolysis
products should be considered to fully
assess the hazards posed by the
constituents that hydrolyze.
The Agency agrees with the
commenters and is (1) determining
which byproducts result from hydrolysis
and (2) developing an appropriate
protocol for predicting the concentration
of hydrolysis byproducts (see Table E-
2). Once this protocol is developed, the
Agency will determine whether any of
these toxicants should be added to the
list of constituents. While the Agency
considered including these constituents
at a higher dilution and attenuation
factor until this work was completed,
the Agency does not have sufficient
information at this time to determine
which of the constituents listed in Table
E-2 will eventually be added to the TC
and at what level.
TABLE E-2—HYDROLYZING CONSTITU-
ENTS LISTED IN THE JUNE 13, 1986
PROPOSED RULE
Acrylonitrfle
Bis(2-chtoroethyl) ether
Methytene chloride
1,1,1,2-Tetrachloroethane
1,1,2.2-Tetrachloroethane
1,1,1-Trichloroe thane
1.1,2-TricWoraethane
viii. Steady-State Assumption. As
implemented for today's rule, EPACML
was solved for the steady-state
condition. Thus, the solution represents
the case where leaching has occurred
for a period of time that is sufficiently
long to allow the concentration at the
receptor well to become constant
Several commenters noted that, in
certain circumstances, use of the steady-
state solution would lead to
unreasonably low DAFs. In particular, in
situations where the mass of a
constituent is relatively low in the
source facility (i.e., the landfill has a
very limited quantity of the constituent
available to contaminate leachate), the
steady-state model will continue to
assume the existence of a very large
quantity of the constituent and, hence,
over-predict the resulting concentration
at the downgradient well. Under such
circumstances, the commenters argue,
the Agency should accommodate this
phenomenon by using a transient
solution in deriving appropriate DAFs.
The Agency agrees with the
commenters and has initiated a study to
thoroughly investigate the problem
described above. Based upon
preliminary investigations already
complete, however, the Agency
continues to believe that application of
the steady-state model to many
constituents is appropriate and is
promulgating regulatory levels for those
constituents based upon the results of
the steady-state model. The preliminary
investigations have also led to a
decision to postpone the promulgation of
regulatory levels for constituents that
are believed to be more appropriately
evaluated with a transient solution. The
Agency is continuing to refine the
approach required to implement the
transient solution but results to date
suggest that this latter group of
constituents require unreasonably large
quantities in the source facility to insure
that the steady-state solution is
appropriate. For example, under some
conditions even when the constituents
exist at concentrations in excess of 1000
ppm of the solid waste within the entire
volume of the landfill, the steady-state
condition is not realized. Therefore,
based upon the preliminary analysis,
regulation of these constituents based
upon the DAFs predicted by the steady-
state model may not be appropriate.
Preliminary investigation of this
condition was completed for all of the
originally proposed constituents. All
constituents were assumed to exist in
the "tested" waste at 1000 ppm.
Furthermore, the "tested" waste was
assumed to occupy 100% of the available
facility capacity (i.e., the "tested" waste
is the only solid waste in the facility).
As a reasonable worst case scenario,
the DAF was derived by the transient
model for each constituent under these
conditions. Because the above
assumptions are very conservative, most
of the DAFs derived for the constituents
were found to coincide with the steady-
state values. That is, sufficient mass
was available to insure that steady-state
conditions were reached. Accordingly,
regulatory levels for these constituents
are being promulgated in this rule. For
the following constituents, however, the
steady-state condition was not achieved
under this scenario:
phenol
1,2-dichlorobenzene
carbon disulfide
isobutanol
2,3,4,6-tetrachlorophenol
toluene
Accordingly, the Agency is postponing
the promulgation of regulatory levels for
these six constituents until such time as
the investigations are complete. Once
these investigations are completed, the
Agency will take the appropriate action.
ix. Biodegradation. The subsurface
fate and transport model does not
account for biodegradation processes in
the subsurface environment. EPA
recognizes, however, that
biodegradation is an important process
that can reduce concentrations under
either aerobic or anaerobic conditions.
Accordingly, the EPA has constructed
the model so that it can theoretically be
modified to include these processes for
experimentally derived biodegradation
rates: Biodegradation processes have
not been included because the data
bases to support this portion of the
model are currently insufficient.
The first major data deficiency is that
the model incorporates many diverse
subsurface environmental conditions
where as constituent-specific
biodegradation rate data typically exist
for only a few (if any) subsurface
environments. EPA also recognizes that
although the kinetic equations
describing the degradation of hazardous
organic chemicals in many
environments are available, these
equations have not been sufficiently
evaluated in the subsurface environment
(Ref. 10,11.12). Second, the Agency
considers data on the formation of
transformation products to be
insufficient. Third, the key processes
that can affect the subsurface
biodegradation rate are not well
understood. These processes include
sorption. pH. temperature, nutrient
availability, toxicity, and others. For
example, while nutrient levels in the
environment are generally considered
sufficient for low populations of
microorganisms, the microorganic .
population at which the nutrient
availability in the environment becomes
a limiting factor is not known.
Additionally, while sorption is well
understood for hydrophobic compounds
at low concentrations (Ref. 13), at
concentrations where the compounds
can form small droplets or become
entrained in the micropores of the
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11824 Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations
subsurface matrix, sorption effects are
not well understood. The effects of
temperature have been characterized in
innumerable studies of isolated
microorganisms, but the kinetics of
these effects have only recently been
investigated in environmental samples
(Ref. 14). Finally, the toxicity of
hazardous chemicals to the
microorganisms themselves is only now
being investigated (Ref. 15).
Accordingly, the Agency is continuing
to gather data to refine the modeling of
biodegradation, but has not been able to
include biodegradation in the ground
water transport model at this time. In
this regard. EPA has published
guidelines for developing anaerobic
. microbiological biodsgradation rate
data for chemicals in the subsurface
environment (see 40 CFR 795.54). Results
developed under these guidelines will
provide data on kinetic rates of
degradation, and to a lesser extent, on
the effects of pH and temperature on
these rates. Similar guidelines have not
been developed for aerobic systems at
this time. Data developed under 40 CFR
795.54 may be considered for use in the
model at some future time.
x. Summary of General Modifications,
The Technical Background Document
(Ref. 9) describes in detail the model
revisions, including options developed
but not implemented for the purposes of
establishing the regulatory levels for
today's rule. A summary of the major
model options and procedures
implemented for the rule follows:
» The model was run for the steady-
state case. The initial condition was a
constant concentration. The equations
were solved for infinite time.
• The unsaturated lone module was
included in the analysis.
• Concentrations can be predicted at
wells placed at any position. The wells
can be allowed to draw from any
selected depth,
• The updated method of computing
dispersivities as a function of random
longitudinal well locations was used
(designated in the model as the "Gelhar
procedure").
» The option implemented for setting
the boundary conditions between ths
unsaturated zone and the aquifer was
the one that limits the lateral extent of
the plume to the downgradient facility
width, computes vertical mixing and
dispersion underneath the facility, and
estimates the maximum source
concentration within the plume based
on mass balance requirements. Any
combination of conditions that violated
these requirements and, thus is not
physically realistic, was rejected.
The above options and additional
options are listed in the background
document for the mods! {Ref. 9).
Specifically, the model input and control
variables, as required and accepted by
the computer code, are listed for each
computer run used to set regulatory
levels in today's rule.
By incorporating these modifications,
the EPACML, as applied to landfills,
models the following basic features:
• The landfills are filled to capacity
and covered with native soil.
« Caps are characterized as being in a
failed or deteriorated state. Thus,
permeabilities are set to be higher than
would be typical of landfills with an
undamaged cap. It is assumed that liners
are not present,
* All wells (exposure points) are
considered to be downgradient in every
model ran. The longitudinal distance
parallel to the direction of ground water
flow is determined from data described
later in section III.E.3.
' • Lateral well location is determined
by allowing the position to uniformly
vary at random within the plume width
and with the additional constraint that
the location also must be within an area
defined by lines at SO-degree angles
from the direction of ground water flow
at the midpoint of the downgradient
boundary of the facility.
• Vertical well location is determined
by allowing the position of the well
intake point to uniformly vary at
random over the entire aquifer depth.
« The landfill storage capacity is
assumed to be sufficient to
accommodate sufficient mass of each
constituent to allow a steady-state
condition to exist. This produces an
infinite source initial condition.
« Constituents contained within the
landfill do not degrade.
« Infiltration rates are represented as
annually averaged flows based on 20-
year climatic records and concomitant
water balance calculations.
b. Use of the EPACML for Surface
Impoundments, Because some wastes
are managed in surface impoundments
rather than landfills, several
commenters indicated the need to
analyze and include the results obtained
by considering a surface impoundment
mismanagement scenario. They argued
that dilution/attenuation factors (DAFsJ
generated by modeling a landfill
scenario would be too stringent for
wastes managed in surface
impoundments. Based upon these
comments, the Agency decided to
investigate whether surface
impoundment DAFs would be
significantly different from landfill
DAFs. EPA requested comment on the
use of this data in the August 1,1988
notice.
Based upon this investigation, the
Agency has concluded that the use of
DAFs based on a landfill scenario is
appropriate in establishing the
regulatory levels for wastes managed in
surface impoundments. EPA used the
EPACML model to confirm this analysis
by modeling a surface impoundment
mismanagement scenario.
This conclusion is based on the
Agency's evaluation of the physical
parameters that would lead to different
DAFs for surface impoundments than
for landfills. A key factor that could lead
to differences in the DAFs from these
two types of management units (surface
impoundments and landfills) Is the
difference in total leachate infiltration
rates. The infiltration rate is equal to the
product of ths leachate mass flux {mass
per unit area per unit time) and the area
of the management unit. For surface
impoundments, the mass flux can be
considerably greater than for landfills.
However, to the extent that the area of
surface impoundments is typically
smaller than the area of landfills
(although some atypical surface
impoundments can be as large, if not
larger than landfills), the effects of the
greater leachate flux are somewhat
offset. That is, while the flux is greater.
the area is smaller, resulting in
relatively similar leachate infiltration
rates.
A second factor that affects the DAFs
is the situation in which the leachate
flux is large and the ground water
velocity is relatively small. In these
situations, a ground water mound may
form below the management unit. This
effect is more typically associated with
surface impoundments because of their
higher leachate fluxes; this effect should
result in smaller DAFs (and, thus, more
stringent regulatory levels) than would
be predicted if the mounding did not
occur. As a result of these factors, the
Agency concluded that DAFs from a
surface impoundment scenario would be
equivalent to or less than DAFs from a
landfill scenario.
To confirm this conclusion, EPA used
EPACML to evaluate a surface
impoundment scenario. The main
features of the surface impoundment
scenario, as simulated using EPACML.
are as follows:
• The surface impoundments are
filled to their fluid capacity and are
assumed to operate on a continuous
basis.
• Bottom layers are characterized as
being in a more permeable state
(typically ten times greater) than those
found in field studies.
* Location rules for downgradient
well positions and lateral and vartica1
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Federal Register / Vol. 55. No. 61 / Thursday, March 29, 1990 / Rules and Regulations 11825
locations are identical to landfills. The
data base for longitudinal distances is
different, however,
» The operating life of the surface
impoundment is assumed to be
sufficient to accommodate a sufficient
mass of constituent to allow a steady-
state condition to exist. This assumption
produces an infinite source initial
condition.
• The leaching rate from a surface
impoundment depends on, among other
factors, the ponding depth in the
impoundment and the characteristics of
the bottom materials. The Hydrologic
Evaluation of Landfill Performance
(HELP) model used in evaluating the
landfill data is inadequate to determine
the leaching rates from surface
impoundments. Therefore, the leaching
rates from subtitle D surface
impoundments were estimated by
considering the relationship between the
velocity in the vertical direction and the
substrate's porosity and permeability
and the solution of the nonlinear steady
state flow problem. To be conservative,
the Agency used a permeability value
ten times higher than the value typically
reported in field studies as an input for
calculating leaching rates (the source of
these data are discussed below).
• The Agency has not yet conducted a
detailed survey for subtitle D surface
impoundments, but the Agency
conducted a review and analysis of data
on subtitle D units in RCRA Facility
Assessment (RFA) Reports (Ref 16). A
set of data on subtitle D surface
impoundments was obtained from this
analysis and used as inputs to the
EPACML. Additional data were
compiled from aerial photographs by
EPA's Environmental Photographic
Interpretation Center (EPIC).
• The data extracted from RFSs
included the area of the surface •
impoundments and the distance to
downgradient drinking water wells as
determined by EPIC.
« The ponding depth data for the
subtitle D surface impoundments were
reported by E, C. Jordan (Ref. 9). The
hydraulic conductivity of the bottom
materials was chosen as 1.0 E-6 cm/sec.
This value reflects the effect of gradual
settlement and compaction of sediments
at the bottom, because surface
impoundments tend to fill up with
sediments over a period of about 20
years or so. The Agency believes that
the hydraulic conductivity value of 1.0
E-6 cm/sec represents a reasonable
worst-case value. These values were
used in conjunction with EPACML to
estimate DAFs for the surface
impoundment data.
As expected, DAFs predicted for
surface impoundments are somewhat
smaller than the corresponding values
for landfills (see section III.E.4).
However, because the EPACML does
not incorporate the mounding effect, the
surface impoundment evaluation was
restricted to include only those cases
where mounding would be minimal and,
thus, reasonably ignored. As a
consequence of limiting tht evaluation
to these cases, the modeling results tend
to omit some worst case scenarios. That
is, if all possible cases were included,
rather than just the "no mounding"
cases, the DAFs for surface
impoundments could be somewhat
lower and, thus, the downgradient
concentrations may be higher than those
estimated by the EPACML model. The
Agency thus believes that the omitted
surface impoundment conditions should
be further investigated and may result in
more stringent regulatory levels. The
Agency believes, however, that the
DAFs produced by the EPACML
analysis properly delineate wastes that
are clearly hazardous wastes.
3. Newly Acquired Data
As previously described, the DAFs
proposed on June 13,1988, were
calculated based on the subtitle D
landfill scenario. However, subtitle D
landfill data were not available to the
Agency at that time, and instead,
subtitle C landfill data were used.
Several commenters criticized the use
of subtitle C (hazardous waste) landfill
data. The Agency agreed with the
commenters and has based the final rule
on data from a survey of solid waste
subtitle D landfills.
a. Landfill Data. The Agency
conducted a survey of municipal solid
waste landfills in the U.S. (Ref. 6). The
survey used a stratified design based on
facility size. The results were tabulated
based on 1,102 completed
questionnaires. The survey yielded data
on area of landfills, distance to the
nearest downgradient drinking1 water
wells, and thickness of the unsaturated
zone. These data are site-specific,
corresponding to individual solid waste
landfills located throughout the United
States. The survey data were analyzed
to develop distributions of these site-
specific parameters and used as inputs
to EPACML, as described in the model
background document (Ref. 9), The input
frequency distributions are also
presented in the background document.
EPA also collected additional data on
leachate generation at municipal
landfills. EPASMOD requires, as input,
the leachate distribution from the
bottom of the landfill. The leaching rate
distributions for the June 13.1988,
proposal were based on the use of a
single soil type, loam, as the cover soil
for the landfill. These distributions were
estimated using climatologic data for a
total of 30 cities nationwide,
representing the median range for each
of 18 climatological conditions or zones
identified in the 48 contiguous states.
The assumptions of a single soil type
and 18 climatic zones were criticized as
not being realistic and resulting in an
overly optimistic cap performance. The
commenters suggested enhancing the
data base by including simulation of
different soil covers.
In response to these comments, the
Agency has implemented a number of
changes. The Agency believes that these
modifications significantly improve the
validity of the leachate flux distribution
and make it more realistic.
So/7 Type
The Soil Conservation Service (SCS)
has a county-by-county soil mapping
program underway. More than SO
percent of the land area in the U.S. has
been mapped, and soil data representing
approximately 51 percent of the total
land area in the U.S. have been entered
into a computer data base. Using this
data base, the soil classifications were
grouped according to the U.S.
Department of Agriculture's definitions
of coarse, medium, and fine textures.
These three categories are represented
in EPACML by soils equivalent in
properties to sandy loam, silt loam, and
silty clay loara for the landfill cover
materials. The latest results show that
coarse grained soils, medium grained
soils, and fine grained soils represent
15.4, 56.6, and 28.0 percent, respectively,
of the soils that have been mapped thus
far.
Climatic Zones
The number of cities representing
climatic variations that were used to
develop frequency distributions for the
leachate generation has been increased
from 30 to 100. The reason for this
change was to reduce the chance that
any one city would provide an
unrepresentative percolation rate in its
climatic range.
The climatic data base used in
EPACML was enhanced to include six
precipitation ranges and five ranges of
pan evaporation rates, thereby resulting
in 30 climatic ranges as opposed to the
18 described in the earlier proposal. For
the climatic ranges so defined, the
percentage of the area of the 43 states
represented by each range was
calculated, and the percent areal
average was used to weight the
percolation (recharge and/or
infiltration) rate estimated for the
selected cities in each range according
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11826 Federal Register / Vol. 55. No. 61 / Thursday, March 29. 1990 / Rules and Regulations
to probable relative occurrence in the
U.S. The effect of these changes is to
provide more representative values of
the overall national distribution of the
leachate flux.
After the percolation data for the
landfill were calculated using the HELP
model (Ref. 9), the climatic ranges were
further subdivided to account for wide
variations in percolation within a range.
This resulted in separate subranges
being established for some California
cities (Los Angeles, Sacramento, San
Diego, and Santa Maria), and two
Oregon cities (Medford and Astoria),
Percolation rates for each of the
selected cities in the 48 contiguous
states were determined using silt loam,
sandy loam, and silly clay loam cover
soils. These soils, based on data
obtained from the SCS, appear to
represent the most common soil types in
the U.S., and thus the most common soil
to be used as covers for landfills. They
also span the range of likely cover soils,
from fine-grained to coarse-grained, or
from low to high percolation rates.
Simulations were performed for each of
these soil types, and the results
weighted according to the frequency of
occurrence for each type.
The leaching rate flux was determined
by using the average, weighted
percolation rate from the cities in each
climatic range. The model background
document (Ref. 9) presents the data used
and the accompanying changes to the
June 13,1986 proposal runs.
b. Chemical-Specific Parameters. In
the EPASMOD proposal, chemical
parameters, such as hydrolysis rates,
were used to calculate the relative
retardation factors and degradation
rates for selected compounds. Some of
the chemical-specific parameters used in
that model were estimated based on a
brief review of the existing chemical
data. Some commenters criticized some
of the parameter values selected and
used for that proposal as being
nonrepresentative of the range of
parameter values.
The Agency has an ongoing program
for the measurement of constituent-
specific parameters and for the review
of new constituent-specific data as
reported in the current scientific
literature, Some hydrolysis rate
constants and octanol-water partition
coefficients used in the proposal have
been revised to reflect the most recent
laboratory measurements and recent
values reported in the literature. The
updated parameter values are given in
the background document (Ref. 9) and
represent either measured or best
available values.
4, DAF Evaluation
a. Selection of an Appropriate
Percentile. As described earlier, the
EPACML was used to investigate the
expected range of DAFs associated with
mismanagement of solid wastes. As
generated by EPACML, the DAF
represents the expected reduction in the
concentration of a constituent during
transport through soil and ground water
from the leachate release point (bottom
of the waste management unit) to an
exposure point (a well serving as a
drinking-water supply). The wide range
of possible environmental settings (e.g.,
ground water velocities, pH,
temperatures, etc.) and tha multitude of
possible scenario configurations (e.g.,
, facility area, distance to downgradient
wells, etc.) result in an extremely wide
range of DAFs. Monte carlo simulation
was used to implement EPACML. and
the resulting cumulative frequency
distribution can be viewed as a ranked
order of increasingly higher
downgradient concentrations expected
from the "best-case" situations (large
DAFs) to the "worst-case" situations
(small DAFs) for the scenario being
investigated.
The Agency's proposed approach was
to define DAFs representative of
reasonable worst-case conditions as
those corresponding to the 85th
percentile of the cumulative frequency
distribution. The Agency received
numerous comments on the selection of
the 85th percentile, which are addressed
in Section d, following.
b. Resulting DAFs for Landfills, The
DAF values corresponding to various
cumulative frequency levels for landfills
are as follows:
Pereenfile
An nondegrading constitu-
ents..
80
328
385
85
134
152
90
47
52
95
12
14
'The DAFs (or chloroform are sligtitiy highw than
tor the other nondegrading constituents because
chlorctcrm is expected to hyfirotyze slightly during
transport
The similar DAF values for
nondegrading constituents and
chloroform arises because all these
constituents either do not degrade at all
or only degrade slightly.
c. Resulting DAFs for Surface
Impoundments. The DAF values
corresponding to various cumulative
frequency levels for the surface
impoundment investigations described
in EJ.b of this section are as follows;
Percentile
AH nondegrading constitu-
ents ..,....,41..,.1......i.«.»-nm..ion
Chloroform «««..-™™..».
80
226
227
85
111
111
90
51
5?
95
19
19
As with the landfills, the constant
DAF for all constituents reflects the fact
that nondegraders and very slow
degraders have virtually identical
environmental fate for the scenario
investigated. As the resulting numbers
indicate, within a.reasonable degree of
accuracy, the DAFs for waste managed
in surface impoundments are equivalent
to the corresponding landfill DAFs.
d. Final DAF Selection. The Agency's
purpose in developing dilution/
attenuation factors (DAFs) is to identify
wastes whose leaching behavior
indicates that they may pose a hazard to
human health unless they are controlled
under subtitle C management standards.
Thus, the Agency developed a
subsurface fate and transport model that
simulates a subtitle D management unit
(i.e., a municipal landfill) and the
subsurface environment that would be
encountered by toxic constituents as
they migrate from the management unit
to a drinking-water well. In order to
make the model's output (DAFs) as
realistic as possible, the Agency
implemented the model using real-world
distributions for parameter values (e.g.,
areas of landfills, properties of the
subsurface environment, etc.) whenever
possible. The monte carlo structure of
the simulation allowed the modeling
results to be presented as a cumulative
frequency distribution or probability.
That is, the model expresses the
probability that a toxic constituent
disposed of in a municipal solid waste
landfill will undergo certain dilution/
attenuation as it moves through a
subsurface environment to an exposure
point. Thus, there is a different DAF for
each selected probability.
In its June 13,1986 proposal notice, the
Agency proposed the use of the DAF
corresponding to the 85th percentile
cumulative frequency level and
requested comment on the use of other
percentile levels. Comments were
received urging the use of both higher
and lower levels. Recommendations for
using the 30th percentile cumulative
frequency were justified by assertions
that the assumptions used in the model
were already unduly conservative. One
commenter noted that EPA could still
rely on the listing program to regulate
wastes whose leachate concentrations
would not exceed the regulatory levels
derived from the lower percentile DAF
but that are still considered hazardous.
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Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations 11827
Other commenters argued that the 85th
percentile was not adequately protective
of human health and the environment.
One commenter, claiming that
assumptions in the model were not
conservative enough, recommended that
the 95th percentile be used.
In selecting the appropriate level, the
Agency recognizes that there is no
consensus "correct" level for
interpreting modeling results. This has
resulted in a particular challenge in
developing today's rule, wherein a
quantitative approach is being used for
guidance in answering what is a partly
qualitative question'—namely, "what is
the human health impact of unregulated
- management of certain types of wastes
in a 'reasonable worst-case* disposal
scenario?" While the Agency believes
that the 85th percentile is an appropriate
choice to represent a reasonable worst-
case result, consideration of the
relationship of the 85th percentile DAF
to other percentile DAFs is also
appropriate. That is, the Agency
believes that the behavior, or shape, of
the upper portion of the cumulative
frequency distribution curve should also
be evaluated in order to determine how
critical the selection of a particular
frequency level is to the DAF.
Another consideration in determining
the appropriate DAF value, independent
of the selected cumulative frequency
level, is the accuracy inherent in the
data set used. Given that there is some
uncertainty associated with any data set
used to represent possible values for
any parameter, and that the model
requires values for many parameters,
the Agency believes that the selected
DAF value should not imply an undue
degree of accuracy.
After considering the above factors,
the Agency has concluded that a DAF
value of 100 is appropriate for
establishing the regulatory levels for the
constituents included in today's rule.1
First, the Agency believes that,
considering the number of parameters
for which distributions of values were
" established (in order to represent a
"generalized" scenario), a DAF with an
order-of-magnitude precision is
1 As explained previously, the Agency is not. in
today's rule, promulgating regulatory levels for
several of the constituents for which regulatory
levels were proposed. These constituents include
those that are expected to hydrolyze appreciably
and those for which it has not yet been determined
whether the steady-state solution to the subsurface
fate and transport mode! is appropriate. Once the
issues associated with these constituents are
resolved, the Agency will promulgate or repropose
(as warranted) regulatory levels for these
constituents. For cases where regulatory levels are
reproposed, they may incorporate dilution/
attenuation factors other than 100,
appropriate.2 Second, in selecting this
DAF value of 100, the Agency noted that
the 80th and 90th percentile DAFs, as
well as the 85th percentile DAFs,
indicate that constituents migrating in
the modeled disposal scenario will be
diluted by approximately two orders of
magnitude. This is also true of the
predicted DAFs from the data used for
surface impoundments. Thus, EPA
believes that a DAF data used for
indicating dilution by two orders of
magnitude (i.e. 100) is appropriate.
Moreover, as the data indicate, on an
order-of-magnitude scale, the predicted
DAF is not extremely sensitive to the
exact cumulative frequency value that
was selected.
The Agency points out that the
considerations leading to the use of 100
to represent the model-predicted
dilution/attenuation factors are unique
to today's promulgation. In other cases,
different conclusions may be more
appropriate. For example, when
parameter values can be more narrowly
defined (as in site-specific evaluations),
the higher degree of precision may be
appropriately ascribed to the model-
predicted DAFs. Likewise, where the
program goals are different (i.e. other
than to identify levels that are indicative
of wastes that clearly are hazardous),
the selection of a value that represents a
cumulative frequency value other than
the 85th percentile may be warranted.
F. Toxicity Characteristic Leaching
Procedure (TCLP) (Method 1311)
1. Introduction
The development of the TCLP and the
role of the test in identifying a waste as
hazardous were discussed at length in
the June 1886 proposal (51 FR 21648).
Today, EPA is promulgating the TCLP,
with some improvements and
modifications, as a replacement to the
EP for use in the identification of
hazardous waste. (The revised TCLP is
promulgated in Appendix II to 40 CFR
part 261 and has been designated as
EPA Method 1311 and will be
incorporated in "Test Methods for
Evaluating Solid Waste Physical/
Chemical Methods—SW-MB",)
The Agency received numerous
comments in response to the Federal
Register notices (51 FR 1602, 51 FR
21648, 51 FR 24856, 51 FR 33297, 51 FR
40593, 51 FR 40643 and 53 FR 18712)
related to the TCLP procedure. In
particular, EPA received close to 140
comments on the application of the
TCLP in response to the June 1988
* The health data is only valid to one order of
magnitude precision and thus may control the total
number of significant figures.
proposal. The comments covered
general issues such as the relationship
to the EP, the adequacy of research
supporting TCLP development and
specifically, the statistical treatment of
data. Commenters also addressed
technical issues including the suitability
of the zero head space extraction (ZHE)
vessel; the types of filters, reagents, and
leaching media; the quality assurance
requirements; and the multiple
extraction and oily waste extraction
procedures. In addition, comments were
received on the use'of quantitation
limits for establishing regulatory levels.
All the comments were categorized and
summarized by issue and are presented
in the technical background document
along with the Agency's response to
these comments (Ref. 4).
In this preamble, only certain
comments are discussed, which include
(a) the applicability of the TCLP to
specific types of waste (i.e.. solidified
wastes); (b) the analytical difficulties
encountered during the analysis of the
TCLP extract for phenolic compounds
and phenoxy acid herbicides: and (c) the
use of quantitation limits. The first two
comment issues are presented below
while the last comment and the
Agency's response is given in section
IV.C. of this preamble.
2, Adoption in the LDR Rulemaking and
Modification from the Proposed Rule
The TCLP was promulgated in
Appendix I to 40 CFR part 288 on
November 7,1986 (51 FR 40593), as part
of the Land Disposal Restrictions Rule
for Solvents and Dioxins. The TCLP is
used in the Land Disposal Restrictions
(LDR) program to determine whether
certain wastes require treatment prior to
land disposal and to determine whether
certain treated wastes meet the
applicable treatment standards. In
today's rule, the Agency has
incorporated two other clarifications to
the TCLP as proposed on May 24,1988
(53 FR 18782) for use in both the LDR
and the TC programs.
The Agency modified the proposed
TCLP as a result of the Agency's own
research and comments received on the
January 14.1988 (51 FR 1602) proposal
for the LDR program and the June 13,
1986 (51 FR 21648) proposal for the TC.
These modifications to the TCLP were
promulgated on November 7,1988 for
the LDR program. On May 24,1888, the
Agency proposed additional
modifications to the TCLP for both the
LDR and the TC. In today's rule, the
Agency has adopted two of these
proposed changes, and is promulgating
the revised TCLP for use in both the
LDR and TC programs.
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11828 Federal Register / Vol. 55, No. 61 / Thursday. March 29, 1990 / Rules and Regulations
The first change is the insertion of a
more detailed method flow chart to
explain how analysts ars to perform the
test. Comments axprsased confusion
regarding the original Dow chart {e.g.,
that it was difficult to follow), so the
Agency has added this new chart to
eliminate confusion. The second change
is the addition of new equipment
suppliers to provide more information
on the availability of suitable testing
equipment. The new equipment
suppliers include two manufacturers of
rotary agitation devices, Environmental
Machine and Design, Inc., of Lynchbarg,
VA, and Miliipore Corporation of
Bedford, MA; two manufacturers of a
2ero-headspace extractor (ZKE) vessel,
. Lars Lands of Whitmore Lake, MI and
Environmental Machine and Design,
Inc., of Lynchburg, VA; and three
manufacturers of filter media, Miliipore
Corporation of Bedford, MA; Nudeopore
Corporation of Pleasanton, CA; and
Micro Filtration Systems of Dublin, CA,
These manufacturers are listed in
Tables 2,3. and 5, respectively, of the
method (i.e., Appendix II of 40 CFR 261),
along with company telephone numbers
and equipment model numbers.
Another more substantial proposed
modification, the addition of a stainless
steel cage insert to the bottle extractor,
will not be added by the Agency at this
time for the reasons discussed below.
The Agency had proposed this
modification to eliminate the
requirement for particle si2e reduction
for certain types of wastes (e.g.,
solidified materials).
3. Applicability of TCLP to Solidified
Wastes
Some commenters expressed
reservations regarding the applicability
of the TCLP to specific types of wastes.
The wastes of concern were solidified
wastes. Numerous commenters
supported the reinstatement of the
structural integrity procedure (SIP) or
some other stability criterion for
solidified wastes. They argued that
particle size reduction (i.e., "grinding")
would be inappropriate in those
instances where solidification of the
waste is needed to meet the best
demonstrated available technology
(BOAT) provisions of the law and that
grinding may not adequately represent
the weathering process or the effect of
vehicular traffic. Commenters
recommended that the Agency retain the
SIP. Others agreed that particle size
reduction is inappropriate for stabilized
monolithic wastes and produces
unrepresentative results. Specifically,
commenters stated that particle aize
reduction alters the physical character
of many solidified wastes by destroying
the cementitious property of these
wastes in such a way that the leaching
rate increases unrealistically. By
increasing the surface area that is
available to attack by a leaching
medium, the amount and rate at which
substances may be leached increases.
Inasmuch as waste grinding is not
normally employed in municipal
landfills, particle size reduction renders
the TCLP a less accurate model of
leaching in a municipal landfill
environment.
Sinca the June 13,1986, proposal the
Agency has reviewed the use of the SIP,
which uses a drop-hammer to test the
integrity of the waste and to reduce its
size if it fractures. The Agency found
that although the SIP may simulate the
potential of a monolithic waste to be
degraded by vehicular traffic on a
landfill, it cannot address certain other
stresses acting on the waste (e.g., wet-
dry and freeze-lhaw cycles], in addition,
the SIP can.only be used for wastes that
can be prepared in a sample of specified
dimensions.
While evaluating the use of the SIP,
the Agency found that dense, hard
materials would occasionally break the
glass extractor bottle. To prevent
breakage of the bottles, the Agency
developed a cage insert for the extractor
bottle. The cage, which is designed to
prevent contact between the hard
sample and the sides of the bottle, is
constructed of 0.25-inch stainless steel
woven mesh. Experiments have shown
that the use of the cage prevents bottle
breakage.
While evaluating the utility of the
cage, the Agency noticed that wastes
that were believed to be well-solidified
retained their monolithic nature in the
cage during extraction, whereas wastes
that were believed to be less well-
stabilized (even though some of them
had passed the SIP) were broken into
small pieces during the extraction. Thus,
these experiments led to the proposed
use of the stainless steel wire cage in the
extraction apparatus (53 FR 28792. May
24,1988). The use of this device, the
Agency believed, tested the physical
integrity of the sample and reduces
particle size appropriately.
Commenters expressed support for
the cage modification—that it Is a step
In the appropriate direction toward a
more realistic assessment of the
environmental leaching potential of a
solidified waste. However, commenters
also had concerns that the cage was
proposed prematurely—that not enough
evaluation of waste samples using the
cage had been done. Specifically,
commenters argued that the cage could
possibly leach significant quantities of
nickel and chromium to contaminate
metals analysis; that it \vould be
difficult to collect representative
samples in some cases; that there were
problems with the configuration of the
cage so that it could not be
accommodated to fit a large array of
bottles; that the cage's construction
provided numerous crevices and a
significant amount of surface area for
waste residue to collect, making
effective cage cleaning difficult; and that
solidified samples could be molded into
a shape that would cause less material
to be sloughed off during extraction.
leading to a less aggressive test. The
Agency agrees with these commenters
and has decided not to go forwerd with
the cage modification at this time. The
Agency currently has work under.vay to
evaluate all these concerns, and will
continue to evaluate modifications of
the TCLP and will propose further
improvements as they are developed.
4. Analytical Methods
Several comments addressed the
analytical difficulties of analyzing the
TCLP extract for phenolic compounds
and phenoxy acid herbicides by gas
chromatography/mass spectroscopy,
SW-848 Method 8250 (GC/MS), These
analytical difficulties include the
interference of the acetate ion in the
TCLP leach fluid with the column
packing material of Method 8250.
Removal of the acetate ion is often
difficult, and equipment damage may
result if the acetate is not removed i\.e.,
the acetate ion can destroy the column
packing material).
The Agency agrees that analysis for
acidic compounds by GC methods may
be difficult, but not impossible. The
Agency suggests the use of a bonded-
phase capillary column (Method 8270) to
reduce the interference from acetate. In
addition, the Agency is investigating
other methods for removal of the acetate
ion from the extract before analysis for
the phenolics and herbicide and
welcomes alternative suggestions.
especially when accompanied by
supporting data.
The Agency had suggested the use of
HPLC as an alternative to GC/MS
analysis of phenolics and phenoxy acid
herbicides. However, several
commenters believed that an HPLC
method is generally regarded as more
expensive and not as readily available
as GC/MS. In addition, some
commenters indicated that GC/MC is a
better method analytically than HPLC.
and that HPLC would be more difficult
to implement The commenters
expressed that, at the very least, a
lengthy verification process woald be
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Federal Register / Vol. 55, No. 81 / Thursday, March 29, 1990 / Rules and Regulations 11829
required to determine an HPLC method's
ruggedness and reproducibility and to
determine the most effective cleanup
steps. The commenters further suggested
that even if an effective HPLC cleanup
procedure is developed and approved by
the Agency, it is bound to increase the
analytical costs and slow down the
analytical throughput. Even without
considering this restriction, the
procedure of leaching the organics into
an aqueous medium, followed by
extraction, recovery, and concentration,
fs bound to require more manpower and
thus more money than a more direct
solvent extraction of the solid itself. The
commenters indicated that methods for
analyzing solid waste for semi-volatile
organics and phenoxyacid herbicides
are already described in SW-848 and
should be the preferred methods, both
for practicality and as a way of
providing a reliable test.
The Agency agrees that the GC/MS or
GC/electron capture (GC/EC) analysis
is more advantageous for the analysis of
phenolics and phenoxy acid herbicides
because the equipment is more readily
"and widely available than HPLC,
despite the associated difficulties. HPLC
methods for phenolic compounds are not
included in the third edition of SW-846
because of a lack of validation data. The
Agency will allow only the use of the
GC/MS method until such time that the
Agency proposes an HPLC method.
C, Testing and Recordkeeping
Reguirements
1. Existing Requirements for Generators
Under existing regulations, persons
who generate solid waste are not
specifically required to test their wastes
to determine whether they exhibit the
characteristic of EP toxicity or any other
characteristic. Instead, solid waste
generators are required to make a
determination as to whether or not their
wastes are hazardous (40 CFR 262.11).
If a waste is found to be excluded
from regulation under § 261.4, or if it is
found to be a listed hazardous waste
under subpart D of 40 CFR part 261, no
further determination of hazardousness
is necessary. On the other hand, if a
waste is neither excluded nor listed, the
solid waste generator must determine
whether it exhibits any of the hazardous
waste characteristics in subpart C of 40
CFR part 281. This determination may
be made by either testing the waste or
applying knowledge of the waste, the
raw materials, and the processes used in
its generation.
If a waste is determined to be
hazardous, the generator must keep
records establishing the basis for that
determination (40 CFR 262.40(c}). These
records must be maintained for at least
3 years after the generator no longer
handles the waste in question. Neither
of these recordkeeping requirements,
however, applies to solid waste
generators who do not generate
hazardous wastes.
Other provisions in the hazardous
waste regulations make generators
responsible for knowing the properties
of their wastes and for documenting that
knowledge. For example, generators
who declare that their wastes are
hazardous must nevertheless have
sufficient knowledge of their wastes to
complete the Uniform Hazardous Waste
Manifest, to use proper labels,
containers, and placards, and to satisfy
all applicable reporting and
recordkeeping requirements (see 45 FR
12728, February 26,1980). In addition, all
generators of hazardous waste are
required under 40 CFR part 268 to
determine whether their wastes are
restricted from land disposal.
2. Changes Considered
In the June 13,1986 proposal, EPA
expressed concern that the current
system for determining whether a solid
waste is hazardous may be inadequate
to ensure that wastes are characterized
properly as hazardous or nonhazardous.
Because of the importance of accurate
hazard determinations to the RCRA
subtitle C program, the Agency
discussed the possibility of requiring
solid waste generators to test their
wastes periodically.
In the proposed rule. EPA identified
three general approaches that might be
adopted in the TC final rule. In the first
approach, the Agency would retain the
current approach, allowing generators to
rely on their knowledge of materials and
processes used in generating wastes as
a basis for their determination. In the
second approach, EPA would require the
testing of wastes, at a frequency
specified by regulation. Finally, in the
third approach, the Agency would
require testing but without specifying a
particular testing frequency. Under this
third approach, generators would be
required to develop an appropriate
testing frequency, based on Agency
guidance, and to document the basis for
their choice.
Commenters were heavily divided on
the issue of testing and recordkeeping
requirements. Many commenters,
including waste management firms and
a few generators, favored mandatory
testing of solid wastes. Most of these
commenters argued that generators
typically lack sufficient information to
determine accurately the composition of
their wastes without testing. Indeed, one
commenter claimed that with 52
constituents regulated at the part-per-
million level or lower, a generator could
never be sure whether a waste exhibits
the TC without performing the TCLP
test. The commenters concluded that
testing is the only reliable method for
ensuring that potentially hazardous
wastes are properly identified and
managed.
A few commenters offered somewhat
different reasons for supporting testing
requirements. For example, some
commenters pointed out that mandatory
testing would facilitate EPA
enforcement efforts. Others claimed that
mandatory testing would reduce
uncertainty by making it clear to
generators precisely what EPA expects
of them with respect to performing
hazardous waste determinations.
Another group of commenters,
however, opposed the imposition of a
formal testing requirement. These
commenters argued that mandatory
testing would place an inordinate
burden on the regulated community
without providing significant benefit for
human health and the environment. In
particular, the commenters claimed that
mandatory testing is unlikely to identify
wastes that were improperly
characterized as nonhazardous when
generators relied exclusively on their
knowledge. According to these
commenters, generators rely on their
knowledge only when the wastes they
produce are clearly hazardous or clearly
nonhazardous. Whenever uncertainty
exists, these commenters stated,
generators either declare their wastes
hazardous or perform appropriate tests.
The commenters emphasized that this
cautioned response "results from
generators' liability for making incorrect
determinations, regardless of whether
they test their wastes. The commenters
concluded that requiring testing of all
wastes would deplete resources and
place a strain on limited laboratory
capacity.
The Agency recognizes that there are
many difficult issues related to the
imposition of a testing requirement, both
for the Toxicity Characteristic and the
other hazardous waste characteristics.
While the Agency believes that a testing
requirement could improve the Agency's
enforcement tools, the Agency believes
that the current requirements for
hazardous waste determinations are not
ineffective because many generators do
have sufficient knowledge to make a
determination without a test. The
Agency further believes that liability for
incorrect determinations provides a
strong incentive for not misclassifying
hazardous wastes as non-hazardous.
Although EPA thinks that the current
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11830 Federal Register / Vol. 55. No. 61 / Thursday, March 29, 1990 / Rules and Regulations
system set forth in 40 CFR 262.11 is
effective, the Agency believes that
imposing a testing requirement does
have some merit, in that it could
increase the accuracy of determinations,
could clarify the responsibilities of
generators, and could facilitate
compliance monitoring,
The Agency will continue to evaluate
the comments on this issue as well as
explore other options for a testing
requirement. At present, however, the
Agency is not yet ready to go forward
with a testing requirement based on any
of the options it has evaluated thus far.
Should the Agency decide that an
appropriate approach is available, it will
propose and solicit comment upon the
details of that approach in a separate
rulemaking. In the meantime, the
Agency believes that the existing
determination requirement (as specified
at 40 CFR 262.11), as well as the liability
for incorrect determinations, is effective
and practical,
H. Applicability to Wastes Managed in
Surface Impoundments
As discussed above, in response to
the proposed TC, EPA received many
comments questioning the validity of
applying the TC to wastes, including
waste waters, likely to be managed in
surface impoundments. In response to
commenters* concerns, on May 18,1987,
EPA published a Supplemental Notice of
Proposed Rulemaking in the Federal
Register, which requested comments
and data on several issues related to the
regulation of wastes managed in surface
impoundments under the TC rule. The
Agency also requested comment
(assuming such an approach) on: (l) The
criteria to be used to determine whether
the surface impoundment scenario
should apply to a particular waste, (2)
the point at which concentration
measurements should be made (e.g., at
the point of generation or within the
impoundment), and (3) how multiple
surface impoundments should be
handled under the TC rule.
Comments received in response to the
notice concerning the surface
impoundment management scenario are
summarized and addressed in section
U1.A.2.C. Comments received in response
to the notice, which addressed sampling
point and multiple impoundment issues,
are discussed below,
1. Sampling Point
In the May 18,1987 notice, EPA
requested comments on whether
evaluations of wastes managed in
surface impoundments should be based
on measurements of the concentration in
the impoundment or at the inlet to the
impoundment In response, some
commenters supported sampling at the
inlet to the impoundment and stated that
sampling the waste within the
impoundment is not only contrary to
Congressional intent, but conflicts with
EPA's own regulations that require the
determination of hazard to be made at
the point of generation.
Other commenters, however, argued
that wastes should be sampled within
the impoundment or that the
impoundment effluent should be
sampled. Many of these commenters
argued that measuring the
concentrations in the impoundment
more accurately represents the
concentrations of hazardous
constituents that pose a threat to ground
water. Some commenters argued that
evaluation of hazard should be based on
impoundment effluent because
concentrations of the wastewaters
within the impoundment are
approximately the same as the
concentrations in the impoundment
effluent.
If the Agency were to allow persons
to make their determinations on the
waste in the impoundment, it would
raise questions that the Agency has not
yet evaluated completely nor taken
comment on. For example, in this
situation, should the Agency actually
require testing; if so, how often and
what should be tested? Would such a
result allow persons to land dispose of
wastes that (but for the point of hazard
determination) would be hazardous,
contrary to Congressional intent? Would
such a result allow persons to treat
wastes without a permit and thus be
inconsistent with Congressional intent?
EPA concedes that, for some activities
(e.g., closure), leachate quality may be
more appropriately assessed by
measuring concentrations at multiple
sites within the impoundment
The current rules require that the
determination of whether a waste is
hazardous be made at the point of
generation (i.e., when the waste
becomes a solid waste). (A waste must
be a solid waste before it can be
classified as a hazardous waste under
RCRA.) EPA believes that determination
of the regulatory status of a waste at the
point of generation continues to be
appropriate, especially since the Agency
is not developing a separate
mismanagement scenario or set of
regulatory levels for wastewaters. To be
consistent with other hazardous waste
regulations and until the Agency
addresses the above questions, EPA is
retaining the existing approach of
requiring sampling at the point of
generation.
2. Multiple Surface Impoundments
In the May 18,1987 notice, EPA
requested comment on how multiple
surface impoundments or "treatment
trains" should be handled under the TC
rule. Some commenters favored
regulating all surface impoundments in a
treatment train as a single unit—if the
first impoundment treats a hazardous
waste, all impoundments would be
required to comply with the RCRA
regulations for hazardous waste
treatment facilities-. Other commenters,.
however, suggested that each
impoundment should be regulated
individually. Still other commenters
stated that owners and operators should
be required to determine whether the
most upstream surface impoundment is
treating wastes that exhibit the TC, but
they should only be required to evaluate
downstream impoundments if an
upstream impoundment exhibits the TC.
As discussed above, the Agency has
decided not to develop a separate
regulatory scheme for surface
impoundments. Thus, the Agency will
continue to regulate all surface
impoundments as individual units and
will not pursue any of the other options
discussed by commentere. Currently,
under 40 CFR part 261, each surface
impoundment in a series of multiple
surface impoundments is regulated
separately. If a surface impoundment
receives or generates a hazardous
waste, the owner or operator of the
impoundment is required to comply with
the RCRA regulations governing
hazardous waste treatment, storage, and
disposal facilities. On the other hand, if
a downstream impoundment is not
treating or generating a
characteristically hazardous waste and
upstream units have not managed, listed
wastes, then the downstream unit is not
subject to RCRA subtitle C
requirements.
/. Relationship to Other RCRA
Regulations
1. Hazardous Waste Identification
Regulations
a. Hazardous Waste Listings. Under
the June 13,1988, proposal, the
hazardous waste listings in subpart D of
40 CFR part 261 would not be affected.
All the listings would remain in effect,
including those listings that were based
on the presence of TC constituents. It is
EPA's intention that the hazardous
waste listings would continue to
complement the revised TC as they had
theEPTC.
A number of commenters, however,
argued that the TC should supersede
certain hazardous waste listings. In
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Federal Register / Vol. 55. No. 61 / Thursday, March 20. 1990 / Rules and Regulations
11831
.particular, they suggested that the TC
should be the only basis for regulating
wastes that have been identified as
hazardous solely because of the
presence of a TC constituent. Such an
approach, according to the commenters,
would establish a more rational basis
for identifying hazardous wastes.
Wastes failing theTC test would be
regulated as hazardous wastes, whether
or not they have previously been listed.
because they have demonstrated the
potential to pose a threat to human
health and the environment. Wastes
passing the TC test, in contrast, would
not be subject to subtitle C regulation.
The commenters claimed that, by
. definition, if the extract from a waste
that was listed because of the presence
of a TC constituent does not contain the
constituent in a concentration greater
than or equal to the regulatory level, the
waste can safely be managed at a
subtitle D facility.
EPA does not agree that the TC
revisions justify elimination of any of
the hazardous waste listings. The
Agency has consistently maintained that
individual waste streams may be listed
regardless of whether the waste is
defined as hazardous by the TC.
Exhibiting a characteristic can
constitute the basis for listing a waste.
In fact, prior to today's action,
approximately 25 listings were- based on
the presence of metals or pesticides
covered by the EPTC.
There are a nnmber of reasons for
continuing this approach. Firstt listed
wastes frequently contain hazardous
constituents other than the ones cited in
Appendix VD of 40 CFR part 261 as- the
basis for the listings. It is for this reason
that Congress directed EPA, in
evaluating delisting petitions, ta
consider constituents other than those
for which the wastes were listed,
assuming that there is a reasonable
basis to believe that such constituents
might render the wastes hazardous (see
RCRA section 3001(fJ). In many cases,
the additional hazardous constituents
that are present in a waste may not be
on the list of TC constituents. The
listings may therefore serve to identify
wastes that pass the TC test bat are
nevertheless hazardous. Removing
wastes from a hazardous waste listing
without an evaluation of additional
constituents would appear to be
inconsistent with the intent of section
3(KM(f).
Another reason for retaining the
hazardous waste listings is that TC
constituents may continue to pose a
threat to human health and the
environment even when they are
present in concentrations lower than the
regulatory levels. The r-iguiatory levels
have not been designed to address the
problems of phytotoxiaty, aquatic
toxicity* or bioaccumulation potential.
Moreover, they have not beea designed
to identify the full range of wastes that
may be toxic to human beings. Instead,
the characteristic levels have been
established at concentrations where
there is a high degree of certainty that
any wastes with constituents at levels
equal to or exceeding the regulatory
levels pose a potential threat to human
health. Individual wastes may continue
to be hazardous, despite the fact that
they may contain TC constituents in
concentrations below the regulatory
levels. This is particularly true for
wastes that have the potential to be
exposed to more aggressive leaching
conditions than those modeled in the
TCLP. As a result, EPA believes that
wastes previously listed as hazardous
should continue to be considered
hazardous, whether or not they exhibit
the characteristic.
b. "Mixture" and "Derived Froat"
Rules. Because the TC will not
supersede the listings for hazardous
wastes, it also will not affect the
regulatory status of wastes that are
hazardous by virtue of the "mixture"
rule of 40 Cm 262.3(a)(2](tv) or the
"derived from" rale of 40 CFR 261 J(c).
The "mixture" rule provides that any
mixture of a listed hazardous waste and
a solid waste is itself a RCRA hazardous
waste.3 The "derived from" rule states
that any waste derived from the
treatment storage, or disposal of a listed
hazardous waste is hazardous.
Several commenters contended that
the current regulatory scheme
encompasses wastes that contain de
minimi's quantities of teachable organic
chemicals. The commenters
acknowledged that mixtures and
treatment residues posing insignificant
threats to human health and the
environment may be excluded front
regulation through the delisting process.
However, they claimed that delisting is
unduly expensive, time-consuming, and,
in some cases, impractical. The
commenters suggested as an alternative
that mixtures and treatment residues
from listed wastes containing TCLP
constituents not be considered
hazardous unless they fail the TC test.
They contended that this approach
would adequately protect human health
and the environment. Moreover, it
3 The exception to this rule ia a mixture of solid
waste and a waste that ii listed solely because it
exhibits a characteristic of hazardous waste. 1C soch
a mixture does not exhibit any characteristic of
hazardous waste, the mixture is not defined a*
hazardous [40 CFS 2ei-3(a){2pW.
would be "self-implementing,1* in the
sense that it would eliminate the need
for the current process of petitions- and
Agency review for delisting.
EPA recognizes that the "mixture"
and "derived from" rules may create
some inequities by including wastes that
contain very small amounts of
hazardous wastes that have been mixed
so as to render them nonhazardous.
However, the Agency has consistently
maintained that the mixture and derived
from rules are an appropriate regulatory
approach for dealing with waste
mixtures and treatment residues.
When the rules were promulgated in
1980, EFA stated that it was essential to
regulate waste mixtures to prevent
generators from evading subtitle C
requirements by simply co-mingling
listed wastes with nonhazardous
wastes. The Agency also determined
that because of the infinite potential
combinations of listed wastes and other
wastes, it was unable at that time to
devise any workable, broadly applicable
formula that was capable of
distinguishing between hazardous and
nonhazardous mixtures. The Agency
acknowledged that the "mixture" rule
might be overly broad, but noted that
generators could avoid any inequities
either by segregating their wastes or by
obtaining a waste-specific exclusion
under the delisting program (see 45 FR
33095, May 19,1980).
EPA also believed that it was
important to regulate wastes from the
treatment, storage, or disposal of listed
hazardous wastes on the basis that
these "derived from" wastes might
themselves be hazardous. Once again,
however, the Agency found that because
of the large number of listed wastes and
treatment processes (some of which
introduce new hazardous constituents
into the treatment residues), it was
unable to prescribe standards that could
properly distinguish between hazardous
and nonhazardous residues. (It should
be noted that the definition of treatment
is not confined to rendering a waste
non-hazardous, but also includes any
method designed to change the nature of
a waste to render the waste (1) less
hazardous; (2) safer to- transport, store,
or dispose; (3) amenable for recovery; or
(4) reduced in volume (see 40* CFR
260.10).) Therefore, the Agency
concluded that wastes generated during
the treatment of listed wastes should be
presumed to be hazardous. Delisting
was provided as the mechanism for
excluding these wastes from subtitle C
regulation (45 FR 33098, May 19,1980).
EPA is sympathetic to the
commenters' concerns regarding use uf
delisting to exclude wastes that are
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11B32 Federal Register / Vol. 55, No. 61 / Thursday, March 29. 1990 / Rules and Regulations
hazardous under the "mixture" and
"derived from" rules. The Agency does
not believe, however, that the
alternative suggested by the
commenters (i.e., relying on the TC to
regulate mixtures and treatment
residues) would adequately protect
human health and the environment. As
noted above, wastes that pass the
characteristic test may nevertheless be
hazardous, either because they contain
listed constituents at concentrations
below the TC regulatory levels but at
levels and under circumstances that
nevertheless render the waste
hazardous or because they contain
hazardous constituents that are not
covered by the TC rule. As noted above,
the TC regulatory levels are not
threshold levels defining all hazardous
waste, but are levels that are set to
clearly define hazardous waste. Wastes
containing constituents falling below
these levels may still present a hazard in
more limited situations.
Nevertheless, the Agency recognizes
that some inequities may result by the
application of the "mixture" and
"derived from" rules to certain dilute
listed wastes. The Agency therefore is
considering proposing an amendment to
the definition of hazardous waste which
would establish self-implementing de
mintmis exemption levels for hazardous
constituents found in listed wastes.
Listed wastes that meet these exemption
levels would no longer be listed
hazardous wastes and thus would not
need to be managed as hazardous
wastes unless they exhibit a hazardous
waste characteristic.
c. Mixture Rule Exemption. The
mixture rule under 40 CFR 26l,3(a)(2}(iv)
provides an exemption from RCRA
subtitle C regulation for mixtures of
wastewaters and certain listed spent
solvents. The mixture rule exemption is
applicable only if the maximum weekly
usage of the solvents (other than
solvents that can be demonstrated not
to be discharged to wastewater) divided
by the average weekly flow of
wastewater does not exceed specified
values. The mixture rule exemption does
not apply to wastewaters that exhibit a
characteristic of hazardous waste or to
wastewaters that contain listed
hazardous wastes not specified in the
mixture rule exemption.
A number of commenters claimed that
the proposed TC conflicts with the
mixture rule exemption. The
commenters noted that the mixture rule
exemption levels are higher than the
corresponding TC regulatory levels for
solvent constituents. Because of this
difference in regulatory levels, the
commenters stated that the proposed TC
rule will bring large quantities of
currently exempted wastewaters into
the hazardous waste management
system. In effect, the commenters argued
that the TC rule will revoke the mixture
rule exemption. Commenters
disapproved of this result, stating that
the mixture rule exemption was
promulgated in recognition that small
amounts of certain spent solvents are
often most efficiently managed by being
discharged to a plant's wastewater
treatment system and that this method
of management does not pose risks to
human health and the environment.
EPA acknowledges that the TC rule
may bring some currently exempted
wastewaters into the subtitle C
regulatory system; however, the mixture
rule exemption is an exemption from the
hazardous waste listings, not the
characteristics. Thus, there is no
inconsistency between this rule and the
mixture rule exemption. In addition, it
should be noted that the TC regulatory
levels are based on state-of-the-art
toxicological data and risk assessment
methodologies. Consequently, EPA
believes that the TC regulatory levels
are the best measures available to
identify wastewater mixtures that pose
a threat to human health and the
environment. In contrast, the mixture
rule exemption levels are based upon
less current risk information.
Even though some wastewaters
presently covered by the mixture rule
exemption will become hazardous
wastes as a result of the TC role, EPA
believes that the exemption will
continue to serve an important purpose
b'y ensuring that mixtures of
wastewaters and certain listed spent
solvents will not be considered
hazardous unless they exhibit a
characteristic of hazardous waste. To
clarify the mixture rule exemption and
make it more consistent with current
risk information, EPA is considering
proposing in the future that the mixture
rule exemption levels be reduced so that
they are equivalent to the TC regulatory
levels.
d Delisting. While the June 13,1986
proposal did not specifically address the
effect that the TC might have on the
hazardous waste delisting program
under 40 CFR 260.22, a. number of
comments were received claiming that
the TC rale would be inconsistent with
existing EPA policies regarding case-by-
case exclusions. In the August 1,1988
proposal, however, the Agency solicited
comment on the use of the EPACML
model in the delisting program.
The commenters noted that each
major element of the delisting program
is different from the corresponding
element in the original TC proposal. For
example, the chronic toxicity reference
levels that are used to establish "no
hazard" levels under the delisting
program appear to differ from the levels
that were used to establish the proposed
TC regulatory standards. In addition, the
delisting program uses (as appropriate)"
a different ground water transport
model (i.e., the Vertical and Horizontal
Spread (VHS) Model), which generates
generic DAFs rather than compound-
specific factors. Finally, the delisting
program employs (as appropriate) the
Organic Leachate Model (OLM) rather
than the IP or the TCLP to determine
the degree to which various organic
constituents are likely to leach from
solid wastes. The commenters urged the
Agency to use the same reference levels,
DAFs, and leaching procedures in both
the characteristic and delisting
programs. A few commenters expressed
a particular preference for adopting the
delisting elements as part of the revised
TC.
There were a number of differences
between the various elements of the
proposed TC and the corresponding
elements in the delisting program.
However, regarding Chronic Toxicity
Reference Levels, the only difference
between the levels used in the delisting
program and those in the TC final rule is
the use of different risk levels for the
carcinogens (i.e., delisting uses a more
conservative risk factor of ID"6 for
carcinogens, compared to the use of a
10"s risk factor in the TC rale). Many of
the differences between the chronic
toxicity reference levels used in the TC
rule and those in the delisting program
have been eliminated as a result of
decisions concerning risk levels and
apportionment Furthermore, the health-
based levels used in the delisting
program and in the TC rale have been
updated to incorporate recent Agency
evaluations (see 53 FR18024).
EPA believes that the risk factors
being used for each program are
appropriate, and does not think that risk
levels used to set regulatory levels
should necessarily be the same in the
two programs because each serves a
separate purpose. Delisting evaluates
the hazard posed by specific individual
wastestreams that have been listed as
hazardous. Characteristics identify
broad classes of clearly hazardous
wastes; specific wastes that may pose a
substantial identified hazard in a lower
risk range may be listed as hazardous.
As discussed below, EPA believes it is ,
appropriate that the delisting program is,
in certain cases, more stringent than the
characteristic program.
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Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations 11333
A number of commenters focused on
the overall stringency of the
characteristic and delisting programs. In
particular, the commenters stated that
the proposed TC regulatory levels were
sometimes greater than and sometimes
leas than the concentration standards
used by the Agency's deiisting program
in determining when listed wastes may
properly be managed in subtitle D
facilities. Most of the commenters
argued that EPA, in the interest of
consistency, should adopt the same
concentration standards under the
characteristic and delisting programs.
Other commenters, however, urged the
Agency to establish higher
concentration standards under the
revised characteristic. The latter group
of commenters noted that characteristics
are designed to identify broad classes of
solid wastes that are "clearly"
hazardous, while listings are designed to
identify wastes that may not exhibit a
characteristic, yet are nevertheless
hazardous. The commenters concluded
that, in light of the different functions of
listings and characteristics, it should be
more difficult for a waste to pass the
delisting standards (i.e., to be eligible for
delisting) than for the same waste to
pass the characteristic test
EPA does not agree with those
commenters who argued that the
Agency must use the same
concentration standards in the
characteristic and deiisting programs or,
that the concentration standards for
characteristics must be higher than
those for delisting. These programs have
very different purposes. While
hazardous waste characteristic levels
are those equal to or above which a
waste is clearly hazardous due to a
particular property, delisting levels are
those bslow which a waste is not
hazardous. Thus, it is reasonable that
these two levels may or may not
coincide. Delisting decisions are based
on an extensive evaluation of a
particular waste which requires specific
information on the waste. The
characteristics approach to defining a
hazardous waste is much more broad.
Only one mismanagement scenario is
used and it is based on "reasonable
worse-case" assumptions resulting in a
"generic" regulatory level to be applied
to all solid waste. And, of course,
section 280.22 of the RCRA regulations
specifies that a waste may not be
delisted if it exhibits a characteristic of
. hazardous waste (e.g., the characteristic
of EP toxicity). Thus, the delisting
program could never be less stringent
than the characteristic program.
In regard to the use of different
models in the delisting and
charaetaristic programs, in the August 1,
1988 Federal Register notice, the Agency
specifically solicited comment on the
use of the Toxicity Characteristics
model (EPACML) in place of the model
currently used in the delisting program
(the VHS model). All of the commenters
supported the use of EPACML instead of
the VHS model in the deiisting program,
although one commenter supported this
only if it would not add complexity and
thereby increase the time required for
delisting petition evaluation. Another
commenter stated that the EPACML
model should be used in ths delisting
program but that petition evaluations
should not be restricted to the use of any
single specific model. Finally, several of
the commenters stated that the Agency
should present details as to how tha
EPACML model would be used for
delisting in a separate Federal Register
notice.
In response to these comments, the
Agency will use the EPACML model and
the TCLP in the delisting program. Also,
as suggested, the Agency will explain
how the model and the TCLP will be
used in a future Federal Register notice.
A few commenters expressed concern
about the applicability of theTC to
wastes that have previously been
delisted. The commenters argued that
once EPA has rulsd (through the waste-
specific delisting process) that a
particular waste stream poses no threat
to human health and the environment,
the Agency should be barred from using
a generic rule to declare the same waste
as being "clearly" hazardous. One
commenter claimed that it would be
especially unfair to alter the regulatory
status of a waste stream after the person
managing it has been granted an
exclusion and has acted in reliance on
that exclusion (e.g., by changing the
production process or waste
management practices).
EPA has consistently maintained that
wastes "excluded" from subtitle C
regulation under the delisting program
may nevertheless be hazardous if they
exhibit a characteristic of hazardous
waste (see 40 CFR 280.22). While the TC
rule will apply to previously delisted
waste, EPA does not. in general, expect
that such wastes will become hazardous
because of application of the revised
TC. The Agency believes that, because
delisting levels are more stringent than
the final TC levels, the impact of the TC
rule on previously delisted wastes will
be minimal. Nevertheless, if a previously
delisted waste exhibits the TC, it will
again be subject to subtitle C
requirements (i.e., delisteef wastes are
treated no differently than any other
solid waste).
2. Land Disposal Restrictions
a. Risk Levels and Frequency Interval.
The approach used to develop
regulatory levels in the proposed TC
rule was similar to ths original approach
suggested for developing treatment
standards in the proposed Land
Disposal Restrictions (LDR) rule (51 FR
1602, January 14,1986). Both proposals
began with health-based concentration
thresholds at the point cf exposure and"
used subsurface.fate and transport
models to back-calculate allowable
constituent concentrations in the
laachate. fa the June 13,193B TC
proposal, ths Agency requested
comments en whether the risk levels
and cumulative frequency level used in
the TC should be the same as those used
to develop the treatment standards in
the proposed LDR rule.
Several commenters supported the use
of different risk levels and cumulative
frequency levels in the two proposals.
These commenters stressed that
different statutory mandates for the two
rules and the entirely different functions
of the TC regulatory levels and the LDR
treatment standards warranted different
approaches. However, other
commenters contended that the
frequency level and risk levels in the TC
rule should be the same as or more
stringent than those used in the LDR
proposal. Some of these commenters
argued that the more stringent risk
levels and frequency level in the LDR
proposal provided a more appropriate
degree of protection for human health
and the environment than the
corresponding levels and frequency
interval in theTC proposal.
The issue of consistency of risk levels
and frequency level for the TC and the
LDR program is now moot. The LDR
final rule (51 FR 40572, November 7,
1988) abandoned the use of screening
levels based on risk methodology and
subsurface fate and transport modeling,
and promulgated an approach to
establishing treatment standards based
entirely on technology-based standards
expressed as Best Demonstrated
Available Technology (BOAT). Today's
rule continues to be based upon health-
based concentration levels and dilution/
attenuation factors, the values for which
are based upon the predictions of a
subsurface late and transport model.
b. Treatment Standards for TC
Wastes. Under RCRA section 3004(g}(4},
EPA is required to make an LDR
determination for all TC wastes within 6
months of today's action, as discussed
in the following section. Several
commenters were concerned that the
LDR treatment standards that will
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11S34 Federal Register / Vol. 55. No. 61 / Thursday. March 29, 1990 / Rules and Regulations
eventually be established for the TC
wastes may be inconsistent with TC
regulatory levels. Some of these
commenters noted that the proposed
LOR treatment standards for listed spent
solvents were in many cases lower than
the proposed TC regulatory levels for
the identical constituents in unlisted
characteristic wastes. The commenters
feared that if LOR treatment standards
are applied to unlisted TC wastes in the
same manner as they are applied to
similar listed wastes, the characteristic
wastes may require treatment to below
the TC level before subtitle C land
disposal is permissible. This means that
unlisted wastes no longer exhibiting the
TC must continue to be managed as
hazardous wastes. Some commenters
who voiced concerns over potential
differences between TC regulatory
levels and LOR treatment standards
suggested that there should be a clear
continuum of regulatory levels, with the
higher standards being those that deem
a waste hazardous in the first place (i.e.,
the TC regulatory levels).
Wastes deemed hazardous under the
TC will not immediately become subject
to the LOR program on the effective date
of the TC rule, except perhaps by
operation of the California List
restrictions (i.e.. halogenated organic
compounds are subject to the LDR if
they exhibit a characteristic, see 52 FR
25770, July 8,1987). However, the
Agency has not yet determined whether
the existing LDR California List
restrictions should be applicable to
newiy identified TC wastes. The Agency
specifically requested comment on the
appropriateness of applying the
California List prohibitions to newly
identified hazardous wastes in the
November 22,1989 proposed rule for the
"Third Third" of scheduled wastes (54
FR 48499). The Agency will fully address
this issue as part of the "Third Third"
final rule.
Since the Agency is not today
proposing LOR treatment standards for
the TC wastes, the Agency believes that
it is more appropriate to address these
comments when the LDR treatment
standards are proposed. However, in
response to comments that proposed
treatment standards for listed solvents
were lower than proposed TC levels, the
Agency would like to point out that the
treatment standards for TC wastes will
not necessarily be the same as the
corresponding LDR treatment standards
for spent solvents. Indeed, if the TC
wastes belong to a different treatability
group, one can expect that the treatment
standards will be different.
c. Schedule for LDR Determinations.
For wastes already listed or identified at
the time of enactment of HSWA. the
Agency must make LDR determinations
according to the schedule set forth in
RCRA section 3004(g)(4). If EPA fails to
make the determinations by the
established schedule, the wastes are
automatically subject to the land
disposal restrictions on the scheduled
date. EPA must also make LDR
determinations for all wastes that are
identified or listed as hazardous after
November 1984 (when HSWA was
enacted) within six months after the
wastes are identified or listed.
On November 22,1989 (54 FR 48372).
EPA proposed treatment standards for
those wastes that exhibit the EPTC, as
well as any of the other characteristics.
Upon the effective date of today's rule,
the TC will include the 14 EPTC
constituents in addition to the 25
organics, and the TCLP will replace the
EP. EPA proposed that the BOAT levels
for wastes that exhibit the EPTC for the
14 constituents remain the same when
the TC becomes effective. By May 8,
1990 the Agency will establish the final
BOAT levels for the 14 constituent
currently identified by the EPTC. Newly
identified TC wastes are subject to the
six-month listing deadline. However,
wastes are not automatically prohibited
from land disposal if EPA fails to make
this required determination within six
months.
Some commenters argued that the six-
month deadline would accelerate the
LOR determinations for listed wastes
that contain TC constituents. For
example, some commercial chemical
products are currently scheduled to be
reviewed by May 8.1990 (51 FR 19300,
May 28,1986). However, these wastes
also may exhibit the TC. Commenters
were concerned that these wastes may
be subject to the six-month deadline and
claimed that this would effectively
accelerate the determinations in a
manner that would be contrary to
Congressional intent.
Wastes that are newly identified as
hazardous by today's rule will be
subject to the six-month deadline for
LDR determinations. However, even if
EPA were to complete LDR
determinations for TC wastes before
May, 1990, the Agency disagrees with
commenters that this has the potential
to accelerate the determinations in a
manner that would be contrary to ,
Congressional intent. The dates set forth
in RCRA section 3004(g)(4) are deadlines
by which EPA must make LDR
determinations or the wastes are
automatically restricted from land
disposal. EPA is in no way prevented or
discouraged by the statute from making
LDR determinations before any of its
deadlines (RCRA section 3004(g)(5).
"Not later than * * *"). Indeed, other
determinations are being made ahead of
schedule; the final rule for restricting
"second third" wastes includes
treatment standards and prohibitions for
some "third third" wastes (54 FR 26594).
3. RCRA Corrective Action and Closure
Requirements
Today's rule will have no direct effect
on either the action levels of RCRA
corrective action or the cleanup
standards of RCRA closure
requirements. However, to the extent
that the TC brings more facilities under
the RCRA program as hazardous waste
management facilities, additional
facilities will be newly subject to the
subtitle C corrective action and closure
requirements.
Although the corrective action
program under subtitle C addresses
remediation of releases of hazardous
constituents from waste at facilities
subject to RCRA permitting, the TC
levels will be neither action levels (i.e..
concentrations that, if exceeded, signal
the need for corrective action) nor
cleanup standards. Rather, corrective
action, as a process, encompasses
trigger levels and cleanup standards that
are developed from site-specific
information gathered during the
investigatory and evaluative phases of
the process (i.e., the RCRA Facility
Investigation and the Corrective
Measures Study).
Thus, the levels or concentrations
associated with today's TC rule are
largely independent from levels
associated with corrective action.
Similarly, the closure requirements are
unaffected by today's rule. The TC is not
used to determine whether a facility has
met the requirements for clean closure.
However, it must be noted that solid
wastes generated as a result of
remediation of releases or in pursuance
of closure requirements that exhibit the
TC must be handled as a hazardous
waste.
4. Minimum Technology Requirements
a. Applicability. HSWA added section
3004(o) to RCRA which imposes
minimum technology requirements on
owners and operators of certain landfills
and surface impoundments seeking
permits. HSWA also added a new
section 3015 imposing similar
requirements on certain interim status
waste piles, landfills, and surface
impoundments. Finally, HSWA section
3005(j) requires surface impoundments
to be retrofitted to meet minimum
technology requirements. EPA codified
the statutory language in the Agency's
U' a
i
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Codification Rule promulgated on July
25,1985 {50 FR 28705). Facilities that will
face new RCRA regulation following the
promulgation of the TC will need to
comply with the minimum technology
requirements in order to remain in
operation.
6. Scope of Minimum Technology
Requirements—1. Permitted Facilities.
Section 3004{o){l](A) requires that after
November 8,1984, certain landfills and
surface impoundments must meet
minimum technology requirements. The
minimum technology requirements for
landfills and surface impoundments
appear in 40 CFR 264.301(c) and
284.221{c), respectively. They require the
owner or operator of each new unit and
each replacement unit or lateral
expansion of an existing unit to install
two or more liners and a leachate
collection system between and, for
landfills, above the liners.
2. Interim Status Facilities. Section
3015 of RCRA requires that certain
waste piles, landfills, and surface
impoundments meet minimum
technology requirements. The minimum
technology requirements for interim
status waste piles, landfills, and surface
impoundments appear in 40 CFR 265.254,
285.301, and 265.221, respectively. They
require that the owner or operator of
each new unit, replacement of an
existing unit, or lateral expansion of an
existing unit that is within the area
identified in the part A permit
application install liners and a leachate
collection system or equivalent
protection. Existing surface
impoundments (i.e., surface
impoundments regulated under subtitle
C prior to November 8,1984) had to be
retrofitted to meet the minimum
technology requirements by November
8,1988.
c. Compliance with Minimum
Technology Requirements. Facilities or
units newly regulated as a result of the
TC will have to meet the minimum
technology requirements of sections
3004(o) and 3015 if and when they add a
new unit, replace an existing unit, or
laterally expand an existing unit.
Surface impoundments must comply
with the retrofitting requirement in
section 3005(j)(6)(A), which requires the
owner or operator of a newly-regulated
surface impoundment to retrofit that
impoundment 4 years from the date of
promulgation of the additional listings or
characteristics, that made it subject to
regulation. Thus, surface impoundments
that become regulated under subtitle C
because of the TC will need to meet the
minimum technology requirements on
March 29,1994, (However, retrofitting
may be expedited due to the minimum
technology requirements imposed under
the capacity variance for land disposal
under section 3004.) This extension
applies only to those impoundments that
contain solely the newly listed/
characteristic wastes. Any
impoundments that already contained
listed/characteristic wastes currently
are subject to RCRA regulations,
including the minimum technology
requirements. Other existing land
disposal units (besides surface
impoundments) that already contained
wastes that exhibit the TC will not
require retrofitting unless they are
expanded or are replacement units.
5. RCRA Subtitle D (Solid Wastes)
a. Municipal Waste Combustion Ash.
Several commentars requested that ash
from municipal waste combustion
(MWC) units be exempt from regulation
under the TC. Many of these
commenters argued that the regulation
of MWC ash would be in direct conflict
with RCRA section 3001{i), which
provides that resource recovery
facilities engaging in MWC "shall not be
deemed to be treating, storing, disposing
of, or otherwise managing hazardous
wastes." Other commenters indicated
that the high costs associated with
subtitle C regulation would discourage
the recovery of energy values from
MSW. They claimed that this result
would run counter to the clear
Congressional intent to encourage
resource recovery as a beneficial
alternative to the landfilling of MSW.
EPA articulated its position on the
scope of section 3001(i) when the
Agency codified the 1984 HSWA (see 50
FR 28725, July 15,1985). However, two
recent Court decisions have rejected
EPA's 1985 interpretation. EDFv. City of
Chicago, No. 88C789 (N.D. Ill,) (slip op.
Nov. 29,1989) and EDFv. Wheelabrator
Technologies Inc., No. 88Civ.0560 (S.D.
N.Y.) {slip op. Nov. 21.1989). The
Agency is considering the appropriate
response to these two decisions.
b. Impact on Wastes Excluded from
Subtitle C Regulation. Another group of
commenters asked for assurances that
the TC rule would not affect the existing
exclusions for specific wastes under 40
CFR 261.4(b). One commenter expressed
particular concern about the exclusion
for mixtures of household and other
nonhazardous solid wastes. Another
commenter raised questions about
applying the TC to wastes that are
usually considered to be non-hazardous
solid wastes. Other commenters focused
on the exemptions for "special wastes,"
primarily mining and mineral processing
wastes and oil and gas production
wastes. A utility company consortium
addressed the exemption for wood
treated with arsenic, commonly used as
a fungicide for utility poles. The
commenter noted that cresols and
pentachlorophenol, also used as
fungicides for wood, are proposed as TC
constituents; the commenter asserted
that the exemption for arsenic-treated
wood should be extended to creosote-
and pentachlorophenol-treated wood as
well.
The TC rule will not apply to wastes
that are already excluded from subtitle
C regulation under § 261.4(b), These
wastes will continue to be exempt from
regulation as hazardous wastes, even if
they would exhibit the TC. Likewise, the
TC rule does not add any exclusions to
the applicability of previously
promulgated hazardous waste
characteristics. With respect to the issue
of creosote- and pentachlorophenol-
treated wood, EPA does not at this time
intend to expand the list of exemptions
under § 281.4(b) to include these wastes.
This is discussed further in section
III.J.4.b.
It should be noted, however, that the
special waste exclusions are currently
being reevaluated in accordance with
the criteria and procedures mandated by
Congress, After completing the studies
required by RCRA section 8002, EPA
may determine that one or more special
wastes should be regulated under RCRA
subtitle C (see RCRA section 300l(b]).
Such wastes would then be listed or the
generators required to determine
whether the wastes exhibit a hazardous
waste characteristic.
A few commenters argued that even if
special wastes are brought into the
subtitle C system, they should not be
subject to the TC. These commenters
claimed that codisposal of special
wastes with MSW is implausible
because special wastes, by definition,
are generated in very large quantities.
The commenters recommended that EPA
develop a separate mismanagement
scenario and leaching procedure for
special wastes.
At this time, the Agency cannot agree
that the TC should not be applicable to
special wastes; rather, the applicability
to these wastes will be determined on a
case-by-case basis. If EPA makes a
determination that any special wastes
should be regulated under RCRA
subtitle C, the Agency will at that time
make a separate determination
concerning the applicability cf the TC to
such wastes.
6. RCRA Subtitle I (Underground
Storage Tanks)
c. Scope of the Underground Storage
Tank Program. Subtitle I of RCRA
provides for the establishment of a
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Federal Register / Vol. 55. No. 61 /Thursday,March 29. 1990 / Rules and Regulations
regulatory program for underground
storage tanks containing "regulated
substances." Regulated substances are
defined under RCRA section 9001(2) as
(1) petroleum and [2] hazardous
substances listed under section 101(14)
of the Comprehensive Environmental
Response, Compensation, and Liability
Act (CERCLA or Superfund), excluding
hazardous wastes regulated under
subtitle C of RCRA.
Except as discussed below, today's
action will change the regulatory status
of TC wastes that were previously
subject to RCRA subtitle I. Because
these wastes will be RCRA hazardous
wastes, they are excluded from
regulation under subtitle I (see 40 CFR
part 280.10(b)(l)). For this reason,
underground storage tanks that contain
TC wastes will be subject to the subtitle
C tank requirements rather than those
promulgated under subtitle I.
b. Deferral for Petroleum-
Contaminated Media and Debris
Subject to Part 280 Corrective Action
Requirements. As part of its
underground storage tank (UST)
program, the Agency has recently
promulgated regulations which address
releases from USTs containing
petroleum (see 53 FR 37082, September
23.1988 and 53 FR 43322, October 2B,
1988), Among other requirements, these
rules require petroleum UST owners and
operators to install leak detection, to
report leaks from their tanks and piping,
to undertake corrective action to
address such releases, and to
demonstrate financial assurance for
corrective action and third party
liability resulting from such releases.
These requirements started going into
effect in December, 1988, and the
Agency estimates that over the next few
years more than 300,000 petroleum UST
releases will be discovered and be
subject to the subtitle I corrective action
requirements. In addition, the Agency
has, through cooperative agreements,
provided funding to states from the
Leaking Underground Storage Tank
(LUST) Trust Fund under RCRA to
undertake the necessary response
actions where petroleum UST owners
and operators are unable or unwilling to
do so. Hundreds of petroleum UST
cleanups have been initiated to date
under this program.
As noted in the preamble to the final
UST rules, due to the large regulated
community affected by the UST
regulations, the UST program is based
on self-implementing requirements and
is highly dependent upon voluntary
compliance to attain the environmental
performance objectives of the program.
However, because petroleum contains
several of the hazardous constituents for
which regulatory levels are being
established today (e,g., benzene) some
of the petroleum-contaminated media
and debris may exhibit the Toxiciry
Characteristic under today's rule. While
the-amount and type of media and
debris that may exhibit the
characteristic at any particular UST site
will depend upon the petroleum product,
soil type, and the size of the release, it is
likely that many sites where petroleum
UST releases have occurred will contain
some media that exhibits the Toxicity
Characteristic, The management of any
such media and debris would be subject
to subtitle C requirements for hazardous
waste management.
The Agency has insufficient
information concerning the full impact of
this rule on UST cleanups, but the
information available to date suggests
that the impact may be severe in terms
of the administrative feasibility of both
the subtitle C and subtitle I programs.
Thus, the Agency has decided to defer a
final decision on the application of the
TC to media and debris contaminated
with petroleum from USTs subject to the
part 280 requirements. The application
of today's rule to these cleanups will be
delayed while the Agency evaluates the
extent and nature of this impact and
alternative administrative mechanisms
for implementing the UST cleanups in
accordance with subtitle C
requirements. The Agency believes that
the UST regulations governing cleanups
at these sites will be adequate in the
interim to protect human health and the
environment.
The deferral of a final decision
concerning application of this rule to
UST cleanups is necessary for several
reasons. First, while the actual number
of sites and amount of media and debris
at each site that would exhibit the
toxicity characteristic under today's rule
is unclear, based on a preliminary
assessment, the number and amount
could be extremely high. As noted
above, EPA expects hundreds of
thousands of UST releases to be
uncovered in the next few years.
Subjecting each of these sites to subtitle
C requirements could overwhelm the
hazardous waste permitting program
and the capacity of existing hazardous
waste treatment, storage, and disposal
facilities. Imposition of the subtitle C
requirements is also likely to delay •
cleanups significantly and severely
discourage the self-monitoring and
voluntary reporting essential to
implementation of the UST program.
Moreover, the UST cleanup activities
involving the most contaminated media
and debris are also likely to involve free
product recovery. Free product recovery
would not be subject to subtitle C
requirements because the material being
recovered is not a waste.
Because of the uncertainties of the
impacts on the UST cleanups as a result
of this rule, including the amount of
contaminated media that would become
hazardous waste and the type of
management feasible and appropriate
for such waste (i.e., on-site-treatment,
off-site disposal), EPA cannot determine
whether the application of this rule to
these cleanups will have the severe
consequences on implementation of
these RCRA programs that preliminary
information suggests. Also, because this
issue did not come to the Agency's
attention until late in the development
of this rulemaking, the Agency has not
had an opportunity to obtain public
input on this issue, the implications of
the subtitle C requirements when
applied to UST cleanups, or any
alternative regulatory mechanisms to
make feasible the implementation of
UST cleanups while meeting subtitle C
hazardous waste requirements. Thus,
the Agency believes that further
evaluation of the impacts of applying the
TC to soils and ground water
contaminated by petroleum from USTs
and subject to the subtitle I program is
necessary in order to determine whether
an exemption for such materials is
warranted or whether additional
regulatory or administrative changes
can or should be made in order to make
the application of the TC to UST
cleanups feasible.
In order to make a final decision
concerning the applicability of this rale
to UST sites, the Agency intends to
undertake several activities. First, the
Agency will attempt to more specifically
define the impact of the TC through
studies of petroleum UST sites, focusing
upon the potential hazard from these
sites. More specifically, the Agency will
study the characteristics of UST sites
(number of UST sites by media type,
volumes of media and debris typically
removed, fraction of this media and
debris that exhibits the TC, if any, etc,},
current practices and requirements for
management of these media and debris,
and how contaminated media and
debris from these sites are managed
under the new subtitle I state programs.
As currently envisioned, these studies
will include: (1) A survey of tank
vendors, contractors, and others
knowledgeable about UST site
characteristics and contaminated media
and debris management practices: (2) a
survey of current state and local
programs; and (3) a sampling program
conducted in conjunction with one or
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11837
more selected states. The Agency also
plans to evaluate the impact that
subtitle C management of petroleum-
contaminated media and debris from
USTs would have on the Agency's and
states' hazardous waste management
programs. In addition, the inclusion of
these media and debris in the subtitle C
management system will be evaluated in
comparison to the available capacity for
commercial hazardous waste treatment,
storage, and disposal.
Second, the Agency will evaluate
whether and how the subtitle C
requirements can be feasibly
implemented for UST cleanups. This
evaluation will include an investigation
of regulatory streamlining, phased
compliance, or other administrative
changes to increase the feasibility of
implementing UST cleanups in
accordance with subtitle C
requirements. As part of this effort and
the larger issue of the application of
subtitle C requirements to contaminated
media, EPA intends to convene a public
forum to discuss the relationship
between subtitle C and subtitle I
requirements, the impacts of the subtitle
C program on UST cleanups, and how
the subtitle C requirements can feasibly
be applied to the UST cleanups.
EPA requests data and comment from
the public on these issues. Upon
completion of the evaluations described
above, EPA will determine whether to
retain the temporary exemption for UST
cleanups provided in this rule or to
remove the exemption and make the TC
fully applicable to corrective actions
under subtitle I.
7. RCRA Section 3004(n) Air Regulations
In HSWA. Congress directed EPA to
"* * * promulgate such regulations for
the monitoring and control of air .
emissions at hazardous waste treatment,
storage, and disposal facilities, including
but not limited to open tanks, surface
impoundments, and landfills, as may be
necessary to protect human health and
the environment." This provision was "
added as section 3004(n) of RCRA. In
response, the Agency proposed the first
of a multi-phased set of air regulations
for TSDFs on February 5,1987 (53 FR
3748). This first phase is intended to
apply to equipment that would be used
to treat wastes that would first be
subject to the Land Disposal
Restrictions (LOR] standards to ensure
that the LOR treatment did not result in
cross-media transfer of hazardous
constituents to the air (see III.I.2., above,
for a discussion of the LDR program).
This first phase is to be followed by
proposals for more comprehensive air
regulations for TSDFs. Once these air
standards are promulgated, they are
expected to apply to many of the wastes
newly regulated by today's rule.
The February 5,1987 proposal would
limit air emissions of organics as a class
from certain treatment units. The
proposed rule would apply to specified
equipment that contains or is in contact
with certain hazardous wastes, which
are identified based upon their potential
to emit organics. The proposed
standards contain two major features.
First, a 95% reduction in process
emissions from units distilling or
stripping (air or steam) organic wastes
would be required. Second, leak
detection and repair programs would be
required for certain valves, pumps,
compressors, pressure relief devices,
and closed-vent systems. If wastes that
exhibit the TC also have concentrations
of organic constituents exceeding the
regulatory threshold, they will be
subject to this first phase of regulation
for air emissions.
/. Relationship to Other Regulatory
Authorities
1. Comprehensive Environmental
Response, Compensation, and Liability
Act (CERCLA)
Although promulgated in fulfillment of
a RCRA mandate, today's rule may
affect, to varying degrees, remedia lions
performed under CERCLA authority.
Such effects or interactions, when they
arise, will be associated with section
121(d) of CERCLA, which requires
CERCLA remedial actions to comply
with all applicable or relevant and
appropriate requirements (ARARs) of
other federal and state laws, including
RCRA.
Several commenters questioned the
applicability of the TC to CERCLA sites
and argued that the TC would constrain
the discretion of Remedial Project
Managers and On-Scene Coordinators.
However, CERCLA section 121(d) is
clear that CERCLA remediations must
comply with Federal and State ARARs.
Accordingly, RCRA regulations,
including today's TC, are incorporated
into the CERCLA decision-making and
remediation process to augment controls
already in place under the CERCLA
program.
In addition, a few commenters argued
that as a result of today's rule, a greater
number of hazardous waste
determinations would be made during
CERCLA remediations. Consequently,
"thousands of additional Superfund
sites" would be created, attributable in
large part, one commenter notes, to
petroleum and petrochemical waste that
will exceed TC levels. The Agency
disagrees with the commenters. While it
is clear that CERCLA remediations must
comply with Federal and State ARARs,
the TC is not used by CERCLA to
determine whether or not to undertake a
clean-up action. Rather, the TC will
apply to decisions concerning the
management of solid wastes (e.g., soil
and debris) generated during cleanup
activities.
2. Clean Water Act
a. Conflict with NPDES Effluent
Guidelines and Pretreatment Standards.
Many commenters argued that the
regulatory levels in the proposed TC
conflict with NPDES effluent guidelines
and pretreatment standards under the
Clean Water Act (CWA). Several
commenters stated that in many cases,
the proposed TC regulatory levels are
lower than the concentrations allowed
in wastewaters directly discharged to
surface waters in compliance with
NPDES effluent guidelines. Commenters
also stated that many wastewaters that
are indirectly discharged to publicly
owned treatment works in compliance
with pretreatment standards will exhibit
the TC.
Most of the commenters argued that it
would be difficult to justify labeling a
wastewater as "hazardous" under
RCRA, but "safe" under the CWA. One
commenter claimed that differential
treatment of identical wastewaters is
particularly difficult to justify because
leaks from on-site wastewater
management operations normally
migrate to the same bodies of water that
receive NPDES-permitted discharges.
EPA acknowledges the possibility that
some wastewaters that meet NPDES
effluent guidelines or pretreatment
standards may exhibit the TC. However,
because the statutory bases for setting
regulatory levels are different under the
CWA and RCRA, the treatment
standards and effluent limitations
established under the CWA are not
inconsistent with the TC rule. The CWA
requires EPA to set effluent limitations
to control discharges of toxic pollutants
"* * * which shall require application
of the best available technology
economically achievable * * *" and to
set more stringent effluent limitations
where necessary to meet applicable
water quality standards (see CWA
section 301(b)). RCRA, however,
mandates that EPA identify wastes
which may be a threat to human health
or the environment. The criteria for the
identification and listing of hazardous
waste requires EPA to take into account
"* * * toxicity, persistence, and
degradability in nature, potential for
accumulation in tissue, and other related
factors such as flammability,
corrosiveness, and other hazardous
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11838 Federal Register / Vol. 55. No. 61 / Thursday, March 29. 1990 / Rules and Regulations
characteristics" (see RCRA section
3001(a)), These criteria are different
from those used under the CWA.
Accordingly, the two statutory
programs have different goals. EPA
believes that the TC regulatory levels
represent concentrations above which a
wastewater poses a potential hazard to
human health and the environment, if
mismanaged, even if it has been treated
to some degree. Therefore, owners and
operators of wastewater treatment
facilities that treat wastewaters
exhibiting the TC will be required to
comply with all applicable regulations
under RCRA and the CWA.
b. Permit Requirements for
Wastewater Treatment Facilities. Many
commenters stated that under the
proposed TC, many wastewater
treatment facilities will become
hazardous waste treatment facilities
subject to full RCRA permitting
requirements. These commenters were
concerned that the costs to industry of
preparing permit applications and
complying with RCRA regulations for"
hazardous waste treatment facilities
will be prohibitive. Some commenters
argued that EPA has insufficient
resources to process permit applications
from all of the wastewater treatment
facilities that will require permits.
Although owners and operators of
some wastewater treatment facilities
that use newly-regulated surface
impoundments could be subject to
RCRA permitting requirements, EPA
believes that the actual number of
facilities requiring permits will not be
large. The Regulatory Impact Analysis
for this rule indicates that other options
available to wastewater treatment
facilities treating wastewaters
exhibiting the TC are likely to be more
cost-effective than obtaining an RCRA
permit (see section VI. B for a more
detailed discussion). In particular, an
alternative that the Agency expects may
be attractive to many owners and
operators is the replacement of surface
impoundments with tanks. Retrofitting
existing surface impoundments to meet
RCRA requirements for hazardous
waste management facilities will often
be more expensive than building tanks
that are subject to CWA requirements in
lieu of RCRA permitting requirements.
("Wastewater treatment units" are
exempt from, the hazardous waste
management standards under 40 CFR
264.1(g)(6) and 265.1{c)[10). Similarly,
"totally enclosed treatment facilities"
are exempt under 40 CFR 284.1{g)(5) and
265.1(c}(9}.) Thus, there are options
available to owners/operators for whom
RCRA standards, may be too costly.
There may be some wastewater
treatment facilities that opt to continue
using surface impoundments to manage
wastewaters exhibiting the TC, and
these facilities will enter the RCRA
permitting system. However, the Agency
does not believe that there will be such
a large number of facilities that it will
overwhelm the Agency's permitting
capabilities.
c. Sludges from Publicly Owned
Treatment Works (POTW). The
preamble to the June 13,1986 proposed
rule requested comments on the
regulation of sewage sludge under
RCRA and under the CWA. The
preamble stated that EPA was
considering an exemption from RCRA
regulation for sludges from publicly
owned treatment works (POTW sludges)
upon the promulgation of sewage sludge
management standards pursuant to
section 405(d) of the CWA,
A number of commenters, including
many municipalities, responded to this
request for comments. Although a few
commenters opposed an exemption from
RCRA for POTW sludges, the
commenting municipalities supported an
exemption from RCRA. These
municipalities stated that sewage sludge
management regulations, in addition to
pretreatment standards, are sufficient to
protect human health and the
environment without additional
regulation under RCRA. Commenters
stated that regulating POTW sludge
under RCRA will place a significant
economic burden on municipalities and
will cause municipalities and EPA to
face duplicative administrative costs
and regulatory confusion.
EPA does not agree with commenters
that regulation of POTW sludge under
RCRA will place a significant economic
burden on municipalities or increase the
burden of implementation. EPA's office
of Water tested 18 POTW sludge
samples using the TCLP; none of the
samples tested exhibited the TC at the
proposed regulatory levels (Ref. 18).
Because the final TC regulatory levels
are higher than the proposed regulatory
levels, the Agency believes that few, if
any, POTW sludges will exhibit the TC.
Thus, most POTW sludges will not be
classified as hazardous waste under
RCRA.
, Although EPA does not believe it is
necessary to exempt POTW sludges
from RCRA at this time, the Agency may
reconsider this decision after the
sewage sludge management regulations
are promulgated. In the unlikely event
that a particular POTW sludge does
exhibit the TC, the municipality may use
the pretreatment program under the
CWA to eliminate the indirect
discharges of the pollutants that are
causing the sludge to exhibit the TC.
3. Safe Drinking Water Act
Several commenters noted that the
proposed regulatory level for chloroform
is lower than the primary drinking water
standard for trihalomethanes (a class of
organic chemicals that includes
chloroform) established under the Safe
Drinking Water Act (SDWA). Most of
these commenters consequently
declared that the regulatory level had
been set too low, and they argued that it
would be unreasonable to regulate
ordinary drinking water as a hazardous
waste. Some commenters asserted that
an industrial facility taking water from a
public water supplier (a facility
supplying drinking water in compliance
with the SDWA rules) could find that its
noncontact cooling water becomes a
hazardous waste after it is passed
through the plant and is disposed.
In today's final rule, the regulatory
level for chloroform has been raised
from that proposed in the June 13,1986,
notice of proposed rulemaking. The
change is because of two modifications
to the data originally used to set the
regulatory level: first, the chronic
toxicity reference level for chloroform is
roughly 12 tines higher than when
originally proposed (see 53 FR18024)
and, second, due to the changes in the
model, the OAF is about 7 times higher
than the one originally proposed.
Together, these two changes result in a
regulatory level that is higher than both
the original regulatory level and the
SDWA standard for trihalomethanes.
Non-contact cooling water or other
wastewaters derived from public water
supplies complying with the SDWA thus
should not exhibit the TC for chloroform
unless these wastewaters are
contaminated by other sources.
4. Federal Insecticide, Fungicide, and
Rodenticide Act (FIFRA)
a. Pesticide Wastes. The Federal
Insecticide, Fungicide, and Rodenticide
Act (FIFRA) authorizes EPA regulation
of pesticide sale, distribution, use, and
disposal. Since RCRA regulations cover
solid wastes which include pesticide
product wastes, these wastes may be
regulated under both FIFRA and RCRA.
Until recently, pesticide disposal
under FIFRA was primarily controlled
by mandating that product labeling
include instructions for the proper
disposal of the pesticide and its
container. Recent amendments to
FIFRA, effective October 25,1988,
authorize the Administrator to impose
additional requirements relating to
storage, transportation, and disposal of
certain pesticides. For example, EPA
under FIFRA may issue requirements
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11839
and procedures for the storage,
transportation, and disposal of
suspended or cancelled pesticides and
of rinsates or containers associated with
the pesticides. Also, EPA may require
that applicants for registration of a
pesticide submit information regarding
methods for safe storage and disposal of
the pesticide, and that applicants for
registration provide evidence of
sufficient financial resources to provide
for disposal in the event of suspension
or cancellation.
A number of pesticide-related wastes
are listed as hazardous under 40 CFR
part 281, The listings include four
groups: The first, at § 261.31, includes
'certain discarded unused pesticide
formulations containing tri-, tetra-, and
pentachlorophenols (F027) or certain
compounds derived from the
chlorophenols; these are listed as acute
hazardous waste. This listing includes
approximately 20 phenoxy pesticides
and their salts and esters. Today's rale
will add the constituent 2,4,6-
trichlorophenol, which is used as an
active ingredient in pesticide products,
to the TC list Because products
containing this constituent are
separately listed under F027, the
promulgation of specific toxicity limits
will not affect their regulation under
RCRA (i.e., they will continue to be
regulated as acute hazardous wastes at
all concentrations, both above and
below the TC level).
The second group, at § 262.32. consists
of "K" wastes from the production of
specific pesticides, such as wastewater
treatment sludges from the production of
the pesticide chlordane (K032); these are
listed as toxic wastes. Again, however,
because these wastes are listed, they
will not be affected by the regulatory
levels of the TC, but will continue to be
subject to regulation regardless of
concentration levels.
The third grouping, at § 261.33 (e) and
ff), consists of "P" and "U" wastes.
Section 261.33 lists certain commercial
chemical products as hazardous when
discarded or intended for discard.
Approximately 50 pesticide active
ingredients are listed as acute
hazardous wastes under § 281.33(e],
while 83 pesticide active ingredients are
listed under § 261.33(1) as toxic
hazardous wastes. Pesticide products
containing these chemicals as sole
active ingredients or the pure or
technical grade of these chemicals are
regulated under both RCRA and FIFRA
when they become wastes. Generally,
products containing these ingredients as
one of multiple active ingredients are
not regulated (at this time) as hazardous
wastes under subtitle C of RCRA unless
they meet one of the characteristics;
their disposal is still subject to any
applicable FIFRA and RCRA subtitle D
requirements. For the majority of the 133
listed pesticides, today's rule will not
change their status under RCRA; waste
pesticides that are either pure, technical
grade, or sole active ingredient products
will continue to be subject to regulation
as hazardous at all concentrations under
RCRA subtitle C. Wastes from multiple
active ingredient products that do not
exhibit a characteristic wiE still be
regulated under any applicable FIFRA
and RCRA subu'Oe D requirements.
Six pesticide wastes that are currently
regulated on a concentration basis
under the existing EPTC at § 261.24,
.form the fourth group. These six
pesticides (endrin, lindane,
methoxychlor, toxaphene, 2.4-D, and
silvex) will be retained in the new rule
with their current concentration limits,
which are based on a DAF of ICO. The
significant difference between the
listings and the TC is that, while
multiple active ingredient products are
not covered by the listings, they are
covered under the characteristic. Thus,
increasing the number of pesticidal
constituents encompassed by the TC
(whether or not they are also listed),
brings more multiple active ingredient
formulations into the subtitle C system.
Consequently, today's rule is expanding
regulation of pesticide wastes under
RCRA.
Although EPA is adding pesticides to
the TC list of constituents, today's rule
will not have a significant effect on
many pesticide users who generate
wastes. RCRA regulations contain
special requirements that affect the
extent to which pesticide users will
become subject to additional RCRA
regulation:
* Household pesticide wastes are,
like other household wastes, exempt
from RCRA.
• Farmers who triple rinse their
containers and dispose of the rinsate on
their own farm in a manner consistent
with 40 CFR 262.51 and label
instructions ara exempt from RCRA
requirements.'
• Other small quantity generators
under § 2B1.S need comply only with
reduced requirements. Many pesticide
users are small quantity generators,
• Under § 261.7, properly emptied
containers may be exempted from
further RCRA requirements. Thus, many
pesticide containers may not be subject
to regulation as hazardous wastes.
As a result, the principal effects of
today's final rule will be felt by
commercial applicators, such as aerial
applicators and pest control operators.
who are not eligible for the special
requirements-applicable to farmers and
who may use sufficiently large volumes
of pesticides that they exceed the small
quantity generator limitations. If they
use large quantities of multiple active
ingredient pesticide products that have
not previously been regulated, such
commercial applicators may be newly
subject to the RCRA hazardous waste
management requirements.
b. Treated Wood Wastes. The Agency
is promulgating TC regulatory levels for
certain chemicals—for example, cresols
and pentachlorophenol—that are
commonly used as wood preservatives.
In its review of wood preservative
chemicals under FIFRA, EPA concluded
that these wood preservatives may
continue to be used under certain
circumstances, and the Agency decided
to allow disposal of treated wood by
means of ordinary trash collection,
burial, or incineration (49 FR 20GG6, July
13,1984, and 51 FR 1334, January 10.
1986). However, the mandates of FIFRA
and RCRA are different. EPA has
previously stated that even if it were
determined that certain ground uses of
treated wood did not pose unreasonable
risks, wood wastes might still be
regulated under RCRA subtitle C (45 FR
78531, November 25,1980). Under
FIFRA, the Agency may determine that
the economic benefits of continued use
of a pesticide outweigh any potential
risks posed by the pesticide. This does
not mean, however, that materials
treated with pesticides should not be
managed in a controlled manner under
RCRA at the end of their useful lives, to
ensure that long-term risks are
minimized.
Some treated wood that is hazardous
solely because it fails the EP toxicity
test for arsenic which is not a hazardous
waste for any other reason or reasons is
exempt from regulation as hazardous (40
CFR 261.4(b)(9)J. The exemption is
limited to wood wastes generated by
persons who use wood products for their
intended end use. Several commentars
claimed that large quantities of treated
wood wastes will be newly regulated as
hazardous under the TC, and they
argued that this result is inconsistent
with other EPA policies and regulations.
Most of these commenters
recommended that EPA expand the
existing exemption for arsenic-treated
wood waste to encompass all treated
wood that exhibits the TC.
EPA has decided not to expand the
existing exemption for arsenic-treated
wood. If a wood waste does exhibit the
TC for a constituent other than arsenic,
or if the waste is hazardous waste for
any other reasons or reasons, the
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11840 Federal Register / Vol. 55. No. 61 / Thursday, March 29, 1990 / Rules and Regulations
Agency believes that the waste should
be regulated as hazardous, in order to
protect human health and the
environment. The arsenic-treated wood
exemption is not being revoked at this
time, but it may be Devaluated in the
future.
5. Food, Drug, and Cosmetic Act (FDCA)
a. Food Wastes. Several commenters
noted that allowable levels set by the
Food and Drug Administration (FDA]
under the Food, Drug, and Cosmetics
Act (FDCA] are, in some cases, higher
than the proposed TC regulatory levels
for the same chemicals. Most of these
commenters then asserted that if it is
safe to consume substances containing
pesticides or additives, it must also be
safe to place such substances in
municipal landfills. Some commenters
expressed concern that food wastes that
comply with FDCA pesticide tolerance
or action levels may nevertheless have
to be handled as hazardous wastes as a
result of the TC. One food processing
industry trade association requested
that the final TC rule state that any
waste from food already in compliance
with a tolerance or action level set by
EPA or FDA is nonhazardous.
The Agency acknowledges that for
certain chemicals in waste, it proposed
TC regulatory levels lower than FDCA
tolerances or action levels in food.
However, it is inappropriate to make a
direct comparison of these two sets of
levels. FDCA levels are set for
concentrations in food products, while
TC levels apply to concentrations in the
leachate from waste materials. Because
not all toxic constituents leach from the
waste, levels in the leachate are lower
than in the waste material itself.
Accordingly, for a food waste to be
hazardous, the waste would have to
have constituent concentrations higher
than the TC levels. The Agency is
unaware of any food-related wastes that
will be regulated as hazardous under the
TC rule. (In addition, unlike the FDCA,
RCRA does not allow consideration of
economic factors in establishing
regulatory levels of concern.)
If any food waste does exhibit the TC,
it may be subject to lesser requirements
as household waste (40 CFR 281.4(b)(l))
or under the small quantity generator
provisions (40 CFR 261.5). For non-
household food wastes that fail the TC
(i.e., leachate from the waste contains
contaminants in levels equal to or above
the regulatory levels promulgated in
today's rule) and that are generated in
large quantities, it is appropriate that
they be managed in a controlled manner
to protect human health and the
environment. Because EPA sees no
conflict between the TC rule and
tolerance or action levels under FDCA,
this rule contains no exemption for
wastes that meet the FDCA standards.
b. Pharmaceutical and Cosmetic
Wastes. Several commenters, arguing
that the proposed TC levels were too
low, pointed out that the proposed
regulatory levels are lower than FDCA-
allowed levels for the same chemicals in
drugs or cosmetics.
Although the proposed TC regulatory
levels for certain chemicals were lower
than the FDCA levels for the same
chemicals in drug and cosmetic
products, the levels are higher in the
final rule. Moreover, it is clear that
different factors must be taken into
account when regulating these
constituents in drugs and cosmetics
rather than in solid wastes, as confirmed
by different statutory mandates. The
constituents in drugs and cosmetics
products, often used in very small
quantities, serve a useful function and
may be therapeutic in certain quantities
and under proper circumstances.
However, this does not mean that these
same constituents should not be
controlled where found at TC levels in
waste materials.
Of course, drug and cosmetic wastes
generated in households are not subject
to subtitle C regulation (40 CFR
261.4(b)(l)) nor are wastes generated by
small quantity generators (less than 100
kg/mo of non-acute hazardous waste—
see 40 CFR 261.5). However, drug and
cosmetic products when discarded may
present risks to human health and the
environment if disposed in large
volumes. Thus, EPA maintains that
regulation of large quantities of drug or
cosmetic wastes exhibiting the TC is
appropriate and not in conflict with the
existing FDCA program.
8. Used Oil Recycling Act
The Used Oil Recycling Act of 1980
(UORA), which amended RCRA, was
intended to increase safe recycling and
reuse of used oil. It established that it is
in the national interest to recycle used
oil in a manner that both protects public
health and the environment and
conserves energy and materials. The
UORA has been incorporated in section
3014 of RCRA.
Section 3014 of RCRA. as amended by
HSWA, requires EPA to make a
determination of whether to list or
identify used oil as a hazardous waste
(see RCRA section 3014(b)). In response
to this statutory directive, EPA proposed
to list most types of used oil, including
recycled used oil, as a hazardous waste
on November 29,1985 (see 50 FR 49258).
EPA subsequently decided in November,
1986 not to list used oil because the
Agency believed that the listing would
discourage recycling of used oil and
could result in an increase in the amount
of used oil that is disposed of or illegally
dumped. The Agency decided to
continue to study whether used oil that
is disposed should be listed as a
hazardous waste under RCRA or
regulated under different statutes (see 51
FR 41900 (November 19,1986)). EPA's
decision to withdraw the proposed
listing of used oils was invalidated by
the D.C. Circuit Court of Appeals in
1988. The Agency was directed by the
Court to reconsider the listing of used oil
as a hazardous waste based on the
technical criteria contained in RCRA
section 3001.
Some commenters claimed that used
oil would be brought into the subtitle C
system under the TC proposal. They
stated that used oil is likely to fail the
TC test for both aromatic hydrocarbons
(e.g., benzene) and chlorinated solvents
(e.g., trichloroethylene and
tetrachloroethylene). The commenters
argued that regulating used oil as a
hazardous waste would be inconsistent
with the intent of the UORA, as well as
with current Agency policies regarding
used oil.
Under today's rule, used oil will be
regulated as a hazardous waste only: (1)
If it exhibits one or more of the
hazardous waste characteristics defined
in subpart C of 40 CFR part 261
(including the TC as finalized today)
and (2) if it is disposed of (rather that
recycled). On the other hand, used oil
that exhibits one or more of the
hazardous waste characteristics and is
recycled is exempt from regulation (see
40 CFR 261.6(a)(3)(iii)) except as
provided in subpart E of 40 CFR part
266. In addition, RCRA prohibits the use
of used oil as a dust suppressant or for
road treatment if it is contaminated with
dioxin or mixed with a hazardous
waste. Thus, used oil that exhibits one.
or more of the characteristics (except for
ignitability) cannot be used as a dust
suppressant. In particular, the
regulations have the following effect:
• Solid waste that is hazardous waste
because it fails a characteristic and that
is recycled (except by burning or use as
a dust suppressant) is exempt from
regulation.
• Characteristically hazardous used
oil that is disposed of (or incinerated
without recovery of energy value) is
subject to full RCRA subtitle C
regulation.
• Characteristically hazardous used
oil that is being burned for energy
recovery is subject to subpart E of part
266—i.e., off-specification used oil is
subject to certain administrative
requirements, while specification used
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11341
oil is subject only to the analysis and
recordkeeping requirements of 40 CFR
266.43(fa) (1) and (6).
• Characteristically hazardous used
oil is prohibited from being used as a
dust suppressant, unless it is hazardous
solely for exhibiting the ignitability
characteristic (see 40 CFR 266.23(b)}.
• Characteristically hazardous used
oil that is recycled in any manner other
than being burned for energy recovery
(e.g., by being rerefined) is exempt from
subtitle C regulation.
Therefore, today's rule will not affect
the regulatory status of most recycled
used oil. In fact, today's rule should
encourage the recycling of used oil, and
not discourage its recycling as suggested
by some commenters. It should also be
noted that some percentage of used oil
already is defined as hazardous (i.e.,
exhibits one or more of the hazardous
waste characteristics and is disposed).
Consequently, the amount of used oil
that is affected by this rule and is either
disposed of or recycled by being burned
for energy recovery or used as a dust
suppressant will be even less.
The Agency is currently determining
how best to deal with used oil listing
and management issues. Section 3014 of
RCRA also requires EPA to promulgate
management standards for used oil that
is recycled. Standards for controlling
used oil which is recycled were
proposed on November 29,1985 (50 FR
49212), but have not been finalized. The
Agency will be addressing these issues
as well as addressing the listing
determination in the near future.
7. Toxic Substances Control Act (TSCA)
EPA has decided to exempt from the
application of this rule certain
polychlorinated biphenyl (PCB) wastes
that are regulated under the Toxic
Substances Control Act (TSCA) and
would be identified as hazardous
because of today's rule. Specifically,
PCB-containing dielectric fluids
removed from electrical transformers,
capacitors, and associated PC3-
contaminated electrical equipment may
exhibit the TC, and thus become
hazardous wastes when disposed, not
because they contain PCBs (which are
not among the constituents regulated
under the TC) but because they may
contain other TC constituents, such as
chlorinated benzenes. The Agency has
decided to exempt such wastes from the
subtitle C management standards
because new regulation of these wastes
under RCRA may be disruptive to the
mandatory phaseout of PCBs in certain
electrical transformers and capacitors.
In addition, the Agency believes that the
regulation of these wastes under TSCA
is adequate to protect human health and
the environment. However, the
exemption applies only to those
dielectric fluids (as described above)
that are fully regulated under TSCA.
Other PCB-containing wastes that are
hazardous (i.e., listed or exhibit a
hazardous waste characteristic
including the existing EPTC wastes—
waste codes D004 through D017) are
subject to all applicable subtitle C
standards. Furthermore, these non-TC
hazardous wastes that are (1) liquids
containing PCBs at concentration
greater than 50 ppm, or (2) solids
containing PCBs listed in Appendix III of
part 288 at concentrations greater than
1000 nig/Kg, are prohibited from land
disposal under 40 CFR part 263.
The disposal and storage of PCB
wastes is regulated under TSCA section
6(e)(l) authority rather than under
subtitle C of RCRA. Since the enactment
of TSCA, the manufacture, processing,
and distribution in commerce of PCBs
(without an exemption) has been
banned and the use of PCB without
authorization has been banned. In
addition, EPA has developed
comprehensive PCB disposal regulations
under TSCA. This regulatory framework
includes specific disposal requirements
for defined classes of PCB wastes,
specific marking requirements for PCB
items, facility recordkeeping
requirements, approval requirements for
disposers, and a proposed notification
and manifesting system modeled on the
subtitle C "cradle to grave" tracking
system.
One commenter stated that utility
transformer dielectric fluids are likely to
exhibit the revised TC and urged the
Agency to exempt PCB-containing utility
transformer dielectric fluids from the
rule. The commenter noted that the
regulation of PCBs is unique because the
manufacture of PCBs (without an
exemption) has been banned. Thus, the
critical regulatory concern with respect
to these PCB wastes is the need to
expedite safe disposal of the chemical.
The commenter stressed that if FCB
wastes were to be regulated now under
RCRA as well as under TSCA, serious
legal, practical and administrative
complications could result.
The Agency agrees with the
commenter. The most significant
potential negative impact of dual
regulation of these wastes under both
RCRA subtitle C and TSCA results from
the unique scope and timing of PCB
disposal. The Agency estimates that
approximately 312 million pounds of
PCBs are dispersed among nearly 30
million discrete units of electrical
equipment. The TSCA regulations
require the phaseout of certain PCB-
containing electrical transformers, and
EPA expects that the TSCA mandatory
phaseout requirements and restrictions
will render the next three years a peak
period for PCB disposal. Under the
authority of the TSCA mandatory
phaseout, by October 1,1990, owners of
secondary network higher voltage
transformers located in or near
commercial buildings are required to
either remove or reclassify these
transformers, ^classification
necessitates draining of all PCB fluids
from the unit, arid replacing them with
non-PCB fluids or low concentration
PCB fluids, and keeping the transformer
in full service, under loaded conditions,
for a minimum of three months.) !n
addition, the phaseout restrictions affect
lower secondary voltage network ur.its
of PCB-containing electrical
transformers located in or near
commercial buildings: by October 1,
1993, such transformers must either be
removed cr bs reclassified, or an
alternative option for lower voltage
units allows for providing enhanced
electrical protection on such units by
October 1,1990. Radial PCB-containing
electrical transformers must either have
enhanced electrical protection or be
removed.
The TSCA program, with which the
regulated community is familiar, is
specifically tailored to deal with the
problem of widely dispersed waste
generation and the timely disposal of a
chemical that is no longer commercially
produced. The confusion that could
result from the addition of requirements
under a separate regulatory disposal
system, and the RCRA disincentives to
waste production, would cause
significant disruption to the expeditious
disposal of large quantities of these PCB
wastes if these wastes were to become
subject to the RCRA hazardous waste
regulations.
In addition, the Agency believes that
the existing system for PCB disposal,
including the existing TSCA disposal
regulations and recent additions to the
program (e.g., the proposed notification
and manifesting rule, published at 53 FR
37436], are adequate to protect human
health and the environment with respect
to the disposal of these wastes. Thus,
further regulation under RCRA for PCB-
containing dielectric fluids and
associated PCB-contaminated electrical
equipment does not appear to be
necessary at this time. The Agency will
also evaluate the integration of the
TSCA PCB regulations with the RCRA
hazardous waste regulations for other
PCB-containing wastes which are
identified or listed as hazardous.
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K. Implementation Issues
EPA received many comments
concerning implementation of the TC
rule. The comments addressed issues
including the schedule for companies
and municipalities to come into
compliance with subtitle C
requirements, exemptions and
applicability, implications for permit
modifications, and administrative
requirements. Major comments on
implementation are summarized and
addressed below. Section V of this
preamble further discusses how the
Agency will implement today's rule.
1. Notification
•In the June 13.1986 Federal Register
notice. EPA proposed to waive the
RCRA section 3010 notification
requirement for persons who manage TC
wastes and have already: (1) Notified
the Agency that they manage other
hazardous wastes and (2) received an
EPA identification number. Virtually all
commenters who addressed the
notification requirement supported
EPA's proposal. However, one state
agency opposed the proposal, on the
grounds that a waiver would hinder
efforts to develop a more accurate and
complete understanding of hazardous
waste management practices within the
United States.
EPA has decided, as proposed, to
waive the notification requirement for
TC waste handlers that have already
notified the Agency that they manage
hazardous wastes and have received an
EPA identification number. The Agency
believes that, given the vast scope of the
TC rule, a notification requirement for
persons already identified within the
hazardous waste management universe
would present an administrative burden
without providing any significant
benefits to human health and the
environment.
2. Effective Date
Several commenters claimed that the
6-month effective date of the TC rule
would not provide them with sufficient
time to come into compliance with the
full array of hazardous waste
regulations. Some commenters argued
that it would be impossible for
generators of TC wastes to test their
wastes, obtain EPA identification
numbers, arrange for transport and off-
site management of their wastes, modify
their short-term storage (i.e.,
accumulation] practices, and institute
the necessary recordkeeping and
reporting procedures within a 6-month
time frame. The commenters stated that
the time constraints are especially
unreasonable in light of the shortages of
laboratory and TSDF capacity that can
be expected to result from the TC
revisions. Other commenters claimed
that TSDFs will require more than 6
months to come into compliance with
the interim status standards of 40 CFR
part 265 (e.g., personnel training,
contingency planning, and financial
responsibility],
EPA appreciates the concerns of the
commenters, and the Agency is aware
that all of the commenters addressing
the effective date for the TC rule
encouraged EPA to adopt a delayed
effective date for most, if not all,
requirements. However, RCRA section
3010(b] requires that hazardous waste
regulations become effective 6 months
after the date of promulgation unless
EPA has good cause to establish an
earlier effective date. Thus, the effective
date for the final TC rule will be 6
months from the date of promulgation.
However, EPA is promulgating
different compliance dates for two
different categories of waste generators:
(1) All generators of more than 100 and
less than 1,000 kg/month of hazardous
waste (small-quantity generators) must
come into compliance with subtitle C
requirements for management of their
TC waste within one year of today; and
(2) all generators of 1,000 kg/month or
more of hazardous waste are required to
comply with all subtitle C requirements
for TC wastes within six months of
today, on the effective date of the rule.
All generators of over 1,000 kg/month
of hazardous waste are required to
comply with all applicable RCRA
regulations for their TC wastes on the
effective date of this rule. (The generator
quantity refers to all of a generator's
hazardous waste, not just newly
hazardous TC waste.) The Agency
recognizes that this compliance category
will include two groups of generators:
current hazardous waste generators,
including small quantity hazardous
waste generators who will be generating
additional hazardous wastes and
generators of large quantities of solid
wastes who will be regulated as
hazardous waste generators for the first
time. EPA believes that both of these
groups of generators should
predominantly be large businesses and
either be familiar with the waste
management regulations or be in a
position to come into compliance with
the requirements within the six month
period. These persons should have been
aware of the Agency's statutory
commitment and have had ample notice
of the impending TC rule through the
proposed rule and supplemental notices.
On the other hand, the Agency is
allowing an additional six months from
the effective date (i.e., one year from
today] for generators of greater than 100
but less than 1,000 kg/month of
hazardous waste (small quantity
generators] to comply with all
applicable subtitle C regulations. (As
with the over 1,000 kg/month category,
this quantity refers to the total quantity
of a generator's hazardous waste, not
just newly hazardous TC waste.) The
TC has the potential to affect an
extremely large number of handlers that
never before have been subject to the
hazardous waste regulations; many of
these firms are small businesses.
Handlers that will assume small
quantity generator status as a result of
the TC rule are most likely not regulated
under subtitle C at the present time.
Thus, these handlers are less likely to be
familiar with the waste management
regulations, or because of their small
business status, will need more than six
months to come into compliance with
the regulations.
As already indicated, these handlers
are likely to be small entities and may
be unaware that their practices, which
were not regulated in the past, will now
be regulated as a result of today's rule.
The Agency recognizes that these new
handlers of small quantities of TC
wastes (over 100 but less than 1.000 kg/
month) may have to test their wastes,
obtain EPA identification numbers,
arrange for transport and off-site
management of their wastes, modify
their short-term storage (i.e.,
accumulation) practices, and institute
the necessary recordkeeping and
reporting procedures. As recognized by
the Agency in establishing special
requirements for small quantity
generators, the burden of initial
compliance may fall relatively harder on
these generators (see 51 FR 10146,
March 24,1986). Thus, to lessen the
burden on the handlers of small
quantities of TC wastes, the Agency has
developed an outreach program targeted
for the small quantity generators which
will inform new generators of the
required steps necessary to enter the
hazardous waste management system.
Effective program outreach, however,
will take more than 6 months.
In amending RCRA in 1984, Congress,
in requiring EPA to promulgate
regulations for small quantity
generators, indicated that the Agency
should consider the impacts on small
businesses, while still providing
protection to human health and the
environment. While this rule is not
promulgated pursuant to this provision,
we believe the intent of Congress is for
the Agency (in promulgating any rule
substantially affecting small quantity
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OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations 11843
generators) to consider such impacts
and to provide procedural adjustments
where appropriate, EPA believes that
extending the compliance'date for this
group of generators will allow the
Agency time to provide necessary
assistance and outreach to these
generators and will allow sufficient time
for small quantity generators to comply
with the full range of applicable subtitle
C requirements. Finally, by delaying the
effective date of the TC for small
quantity generators, the Agency will be
able to concentrate its initial
implementation efforts on large quantity
generators, who will generate the vast
majority of waste brought into the
' RCRA subtitle C system under this rule.
Thus, because the delayed compliance
date for small quantity generators
enables the Agency to focus its attention
on the waste generators expected to
produce the largest volumes of waste, it
maximizes protection of human health
and the environment.
In summary, the Agency believes that
allowing an additional six months for
small quantity generators to come into
full compliance with the TC will serve
two purposes. First, it will allow the
Agency time to educate small quantity
generators on the RCRA rules, while at
the same time, allowing the Agency to
focus immediate implementation efforts
on large generators of hazardous waste.
Second, it will provide the necessary
time for small quantity generators to
comply with subtitle C requirements as
a result of the TC.
3. Permitting
Several commenters expressed
concern that they would not be able to
submit required permit modifications
before the effective date of the rule.
Some commenters also expressed
concern that the TC revisions could
place a significant burden on the system
for permitting hazardous waste
treatment, storage, and disposal
facilities.
The commenters recommended a
number of different mechanisms for
reducing the prospective burdens on the
permitting system, such as (1) Allowing
permitted facilities to operate under
interim status with respect to newly
regulated wastes; (2) handling requests
from permitted facilities to manage TC
wastes as minor permit modifications,
rather than as major permit
modifications (especially in the case of
facilities that are already permitted to
manage listed wastes containing TC
constituents); (3) requiring permitted
facilities to apply for major permit
modifications by the effective date of
the TC rule, but not requiring them to
actually obtain the modification until a
later date; or (4) delaying the effective
date of the final rule.
EPA has promulgated amendments to
the procedures for permit modifications
for treatment, storage, and disposal
facilities on September 28,1983 (53 FR
37934). These changes to the regulations
should generally allay the concerns
expressed by the commenters. Although
the new permit modifications rule will
not automatically be effective in'
authorized states, EPA expects that
many authorized states will adopt the
provisions and EPA plans to use the
new permit modification procedures to
implement the TC. The new permit
modification procedures are further
explained in section V.
IV. Regulatory Levels
The regulatory levels established in
today's rule are based on two
elements—the toxicity of each
constituent and the expected fate of the
constituent when released into the
environment. The latter element is
expressed as a dilution/attenuation
factor (DAF), which, when multiplied by
the toxicity value, results in the
regulatory level. It is this level that.
when compared to the results of the
TCLP, defines a waste as hazardous. If
the waste leachate generated through
the TCLP contains constituents equal to
or above the regulatory levels in today's
rule, the waste is a hazardous waste.
This section summarizes the Agency's
basis for selecting the final list of
constituents and the regulatory levels
that are being promulgated in today's
rule.
A. List of Constituents
1. Proposed List
The Agency initially proposed
regulatory levels for 38 new organic
• constituents, proposed to modify the
regulatory levels for the six organic
constituents that are regulated under the
existing EPTC, and proposed to retain
the existing levels for the eight inorganic
constituents regulated in the existing
EPTC (see Table IV-1).
2. Constituents for Which Final
Regulatory Levels Are Not Now Being
Promulgated
The model used to predict DAFs for
today's rule accounts for hydrolysis.
which may occur during the transport of
a constituent through the environment. If
a constituent hydrolyzes during
transport, its concentration will
decrease more rapidly than it would if it
were influenced by dispersion alone.
Therefore, the DAF for a constituent that
hydrolyzes during transport will be
higher than that for a constituent that
does not hydrolyze. However, the
products that are formed because of
hydrolysis of the constituent also may
be toxic.
TABLE IV-1.—TC CONSTITUENTS AND REGULATORY LEVEUS PROPOSED JUNE 13,1986
HWNO1
D016 . . ... _ ,.
DQ04
0005 „.. „„
0019 .
0020 ™ , ..„__." ™™..,,
0006 .„_
D021 - _...... „
0022 .- . ~ ...
0023 .
0024 » ~. .. .
D02S „.,.. .
0007 „ _
0026 .... . ~ - ~
0027 . •
0028 „_ -...
0016 . . _
0029 _ _.
D03Q , . .
0031
Constituents
Benzene . . ....... -
BisC2-cMoroethyi; ether
Cadmium . ... . .. .. ~
Carbon (ffisuttide . . .... ... «. .7.
Carbon tetfachlorida..,. „ . , . ..
Chiordano...... ...... ..... . . . .
Chlorooenzene. . ....
Chloroform ...
Chromium ....... .,....„.„,
o-Cresol ....
m-Cresol . . . .
p-Crssol ..... .
2,4-D
1 ,2-Dichlorobenzene
1 ,4-Dicrik3robenzene ...
1,2-Dichloroethane
CASNO *
107-13-1
7440-38-2
7440-39-3
71-43-2
111-44-4
7440-43-9
75-15-0
58-23-5
57-74-9
108-90-7
67-66-3
1333-82-0
95-46-7
106-39-4
. 106-44-5
94-75-7
96-50-1
106-46-7
107-08-2
Regulatory
level (mg/U
50
50
1000
007
005
1 0
14 4
007
003
1 4
007
50
1C 0
100
100
1 4
43
108
O.-iO
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Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations
11845
levels for these constituents at their
current levels. When the MINTEQ
model (see III.B.S.c) is available to
accommodate these constituents, the
Agency will reconsider their regulatory
levels and propose new ones, if so
warranted.
B. Selection ofDAFs
The selection of the appropriate DAF
for the constituents addressed in today's
rule is based on the municipal landfill
scenario, as proposed. However, based
on comments on fate processes that
were not appropriately considered in the
model, several constituents have been
omitted from the proposed list of
constituents — specifically, those that
may hydrolyze to more than a negligible
extent and those for which the steady-
state assumption may not be
appropriate.
For the remaining constituents, the
Agency believes that a DAF of 100 is
appropriate for establishing regulatory
levels in today's rule. The basis for this
conclusion is explained in Section
C. Analytical Constraints
The regulatory levels for the
compounds proposed for inclusion in the
TC span approximately five orders of
magnitude (i.e., from the low parts per
billion to 100 parts per million). The
calculated regulatory levels for three of
these compounds (2,4-dinitrotoluene,
hexachlorobenzene, and pyridine) are
below the concentrations measurable
using currently available methods.
EPA believes that the appropriate
way to deal with a calculated regulatory
level that is below the analytical
detection limit is to use (for the
regulatory level) the lowest level of
detection that can be attained. The
lowest level of a particular chemical
that can be reliably measured within
acceptable limits of precision and
accuracy under routine laboratory
operating conditions is that chemical's
"quantitation limit." A quantitation limit
is determined through such studies as
method performance evaluations.
If data from Intel-laboratory studies
are unavailable, quantitation limits are
estimated based on the detection limits
and an estimated multiplier that
represents a practical and routinely
achievable level with relatively high
certainty that the reported value is
reliable. EPA proposed to use a value of
five times the analytical detection limit
as the quantitation limit and to set the
regulatory level at the quantitation limit
for those compounds for which the
calculated regulatory level is below the
quantitation limit, and interlaboratory
studies were not available.
Because TCLP extracts are aqueous in
nature, the quantitation limits used in
this rule are based on the presence of
these compounds in a water matrix. The
Agency received many comments on the
use of the quantitation limit as the
regulatory level for the three compounds
with health-based thresholds below that
level. Most commenters expressed
concern that quantitation limits based
on analysis of the constituent in a water
matrix may not be achievable in more
complex samples. The comments
discussed potential complications that
could hamper analysis of various kinds
of wastes and recommended that EPA
work toward determining actual
quantitation limits on real wastes.
The Agency agrees that the ability to
achieve the quantitation levels listed in
the proposed rule is strongly influenced
by the type of waste that is being
analyzed. However, determination of a
matrix-dependent quantitation limit
would require analysis of a wide variety
of wastes. EPA believes that it would be
impractical to perform such waste-
specific analyses at this time. Therefore,
EPA has chosen to use the proposed
definition (i.e., five times the method
detection limit) for the quantitation
limit.
A number of commenters addressed
the issue of the generic multiplier used
to derive the quantitation limit. Several
commenters recommended using 10 to
25 times the detection limit as the
regulatory level, while a few
commenters supported setting the
regulatory level at the detection limit
itself, to provide what they believe
would be greater environmental
protection.
The Agency is working to improve the
sensitivity of analytical methods to
provide increased protection of human
health and the environment. Analytical
detection limits are, by definition,-not
routinely achievable under average
laboratory conditions. Thus, a
regulatory level set at the detection limit
would be difficult for the Agency to
enforce and would make it difficult for
the regulated community to demonstrate
compliance. To provide a consistently
enforceable regulatory limit while
providing assurance that those wastes
that clearly pose hazards are subject to
subtitle C requirements, the Agency will
set the regulatory level at five times the
detection limit. The Agency has a high
degree of confidence in setting the
regulatory level at the quantitation limit
(i.e., five times the detection limit)
because other programs within the
Agency have successfully used this
method in the past to set regulatory
levels (e.g., the Contract Laboratory
Program under the Superfund Program).
Comments on the use of the
quantitation limit are addressed more
extensively in the testing methods
background document.
D, Final Regulatory Levels
The regulatory levels being
promulgated today are equal to the
product of each constituent's toxicity
threshold and the DAF or the
quantitation limit. These regulatory
levels are presented in Table IV-3.
These levels are designed to identify
wastes that clearly pose a hazard and
define those wastes as hazardous.
However, it should be noted that wastes
that do not exhibit this characteristic
(e.g., result in TCLP levels that are less
than the regulatory levels) are not
necessarily nonhazardous and may be
listed as a hazardous waste or become
hazardous under other hazardous waste-
characteristics.
TABLE IV-3.—TOXICITY CHARACTERISTIC CONSTITUENTS AND REGULATORY LEVELS
EPA HW number >
D004 _
0005
0018
D006
0019 _ _
0020
0021 . _ - _
D022
0007 ~
O023
Constituent
Arsenic
Barium
Benzene
Cadmium
Cartoon tetrachlonde „
Chlordane
Chlorobenzene _
Chloroform
Chromium „
o-C'esol
CAS
Number '
7440-38-2
7440-39-3
71-43-2
7440-43-9
56-23-5
57.74-9
108-90-7
67-66-3
7440-47-3
95-48-7
Regulatory
level (mg/L)
5.0
1000
0.5
1 0
0.5
003
100.0
60
5.0
< 200.0
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Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations 11847
administer and enforce the RCRA
program within the state (see 40 CFR
part 271 for the standards and
requirements for authorization).
Following authorization, EPA retains
enforcement authority under sections
3008, 7003 and 3013 of RCRA, although
authorized states have primary
enforcement responsibility. Prior to
HSWA, a state with final authorization
administered its hazardous waste
program entirely in lieu of the federal
program. The federal requirements no
longer applied in the authorized state,
and EPA could not issue permits for any
facilities in a state that was authorized
to issue permits. When new, more
- stringent federal requirements were
promulgated or enacted, the state was
obligated to enact equivalent authority
within specified time frames. New
federal requirements did not take effect
in an authorized state until the state
adopted the requirements as state law.
In contrast, under section 3006(g) of
RCRA, 42 U.S.C, 6926{g), new
requirements and prohibitions imposed
by HSWA take effect in authorized
states at the same time that they take
effect in nonauthorized states. EPA is
directed to carry out those requirements
and prohibitions in authorized states,
including the issuance of permits, until
the state is granted authorization to do
so. While states must still adopt HSWA-
related provisions as state law to retain
final authorization, the HSWA
requirements are implemented by EPA
in authorized states in the interim.
Today's rale is promulgated pursuant
to RCRA section 300l(gj and (h). These
provisions were added by HSWA.
Therefore, the Agency is adding the
requirement to Table 1 in § 271.1(j),
which identifies the federal program
requirements that are promulgated
pursuant to HSWA and that take effect
in all states, regardless of their
authorization status. States may apply
for either interim of final authorization
for the HSWA provisions identified in
Table 1, as discussed in the following
section of this preamble.
2. Effect on State Authorization
As noted above, EPA will implement
today's rale to authorized states until
they modify their programs to adopt
these rules and the modifications are
approved by EPA. Because the rule is
promulgated pursuant to HSWA, a state
submitting a program modification may
apply to receive either interim or final
authorization under section 3008(g)(2) or
3006(b), respectively, on the basis of
requirements that are substantially
equivalent or equivalent to EPA's. The
procedures and schedule for state
program modifications for either interim
or final authorization are described in 40
CFR 271.21. It should be noted that all
HSWA interim authorizations will
expire January 1,1993 [see 40 CFR
271.24(c)).
40 CFR 271.21(e){2) requires that
states with final authorization must
modify their programs to reflect federal
program changes, and they must
subsequently submit the modifications
to EPA for approval. The deadline for
state program modifications for this rale
is July 1,1991 (or July 1,1992, if a state
statutory change is needed). These
deadlines can be extended in certain
cases (40 CFR 271.21(e}{3)). Once EPA
approves the modification, the state
requirements become subtitle C RCRA
requirements. States with authorized
RCRA programs may already have
requirements similar to those in today's
rule. These state regulations have not
been assessed against the federal
regulations being promulgated today to
determine whether they meet the tests
for authorization. Thus, a state is not
authorized to implement these
requirements in lieu of EPA until the
state program modification is approved.
Of course, states with existing standards
may continue to administer and enforce
their standards as a matter of state law.
In implementing the federal program,
EPA will work with states under
cooperative agreements to minimize
duplication of efforts. In many cases,
EPA will be able to defer to the states in
their program implementation efforts,
rather than take separate actions under
federal authority.
States that submit their official
applications for final authorization less
than 12 months after the effective date
of these standards are not required to
include standards equivalent to these
standards is their application. However,
the state must modify its program by the
deadline set forth in § 271.21le). States
that submit official applications for final
authorization 12 months after the
effective date of these standards must
include standards equivalent to these
standards in their application. The
process and schedule for final state
authorization applications is described
in 40 CFR 271.3,
B. Integration of Today's Final Rule
with Existing EPIC
As explained above, because this rule
is promulgated pursuant to HSWA, it
will be effective six months from today
in both authorized and unauthorized
states and will be implemented by EPA
until states receiv.e authorization for this
rule. Thus, beginning on the effective
date, large quantity generators that
generate TC waste in all states are
responsible for complying with the
appropriate requirements. However, the
rule promulgated today also revises an
existing RCRA rule defining hazardous
wastes that authorized states have been
implementing for some time. The two
principal changes in the rule are the
revision to the leaching procedure, by
replacing the EP with the TCLP, and the
addition of constituents for which the
leachate will be analyzed. The
discussion below and Table V-2
describe how state implementation of
the existing EPTC will be integrated
with EPA implementation of the TC as
promulgated today.
1. Facilities Located in Authorized
States
There are three types of facilities
located in authorized states which are
affected by today's rule: facilities which
are already operating under a RCRA
permit, facilities which are already
operating under interim status, and
facilities which are subject to RCRA
permit requirements for the first time as
a result of today's rule. Permitted and
interim status facilities can also be
affected by today's rule in three distinct
ways: (1) The facility may already be
managing wastes that are hazardous
under the existing EPTC, (2) the facility
may already be managing wastes that
are hazardous under the existing EPTC
but which also exhibit the toxicity
characteristic for a new constituent(s)
under today's rule (and thus the waste
would have a new waste code), or {3}
the facility may be managing a solid
waste which is newly subject to
regulation as a result of today's revision
of the TC. Table V-2 summarizes the
initial filing requirements and applicable
standards for each category of facility.
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11848 Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations
TABLE V-2.—INTEGRATION OF TC WITH EXISTING EPIC
Status of State authorization
1, Authorized Stale
11. N0i>authoiizac State
Facility status
A. Permitted
8. Interim Status
C. Newly-regulated....
B. Interim Status
C. Newly-regulated....
Type at waste
1. Regulated EPA
waste w/no new
constituents under
revised TC.
2. Regulated EP waste
w/naw constituents.
3. Previously
• unregulated waste in:
-Already regulated
unit,
-Previously
unregulated unit
1. Regulated EP waste
w/no new
constituents under
revised TC.
2. Regulated EP waste
w/new constituents
under revised TC.
3. Previously
unregulated waste.
1 Regulated EP waste
w/no new
constituents under
revised TC.
2. Regulate EP waste
w/new constituents
under revised TC.
3. Previously
unregulated waste in:
-Already regulated
unit
-Previously
unregulated unit
1. Regulated EP waste
w/no new
constituents under
revised TC.
w/new constituents
under revised TC.
3. Previously
unregulated waste.
What to file
NA
Class 1 permit
modification under 40
CFR 270.42.
Class 1 permit
modification under 40
CFR 270.42.'
NA
Revised Part A under
40 CFH 270.72.
Revised Part A under
40 CFH 270.72. l
Part A and 3010 under
40 CFR 270.70.»
NA .. ..
Class 1 permit
modification under 40
CFR 270.42.
Class 1 permit
modification under 40
CFR 270.42. '
NA „ .
40 CFR 270.72.
Revised Part A under
40 CFR 270.72.«
Part A and 3010 under
40 CFR 270.70.»
Where to Me
NA »
EPA Regional Office
and State.
EPA Regional Office
and State.
NA
EPA Regional Office
and State.
EPA Regional Office
and State,
EPA Regional Office
NA
EPA Regional Office
EPA Regional Office
NA „.
EPA Regional Office .«
EPA Regional Office
EPA Regional Office........
Applicable permitting
standards
State permit standards.
State permit standards.
State permit standards.
40 CFR Part 265.
standards.
State interim status
standards.
40 CFR Part 265.
40 CFR Part 265
40 CFH Part 264
40 CFR Part 265.
40 CFH Part 264.
40 CFR Part 265.
40 CFH Part 265.
40 CFR Part 265
40 CFR Part 265.
40 CFH Part 265.
1 Facility may also need to receive a Class 2 or Class 3 modification under CFR 270.42.
3 If newly regulated waste is being managed in a land disposal unit, facility may need to submit certification of compliance within one year under 40 CFR 270.73.
»If facility is a land disposal facility, Part B permit application and certfication of complia "
and 40 CFH 270.73.
i of compliance must be submitted within one year under RCRA Section 3005(e)(3)
For facilities which have been
managing EPTC wastes under an
authorized state program and the
constituents exhibited by the wastes are
unchanged under today's rule, (i.e., no
waste code change is necessary), such
interim status and permitted facilities
have no changes to file with permitting
authorities. Similarly, since the
regulatory status of the waste is
unchanged, management of that waste
will continue to be regulated under the
authorized state standards. The only
effect of today's rule on such facilities is
that the facility must use the TCLP when
testing for toxic constituents. However,
use of the EP in addition to the TCLP
may continue to be required as a matter
of state law.
For facilities which have been
managing EPTC wastes under an
authorized state program and the
constituents exhibited by the wastes
have changed as a result of today's rule,
the facility will need to change the
waste code assigned to its TC wastes.
Permitted facilities must submit permit
modifications to EPA reflecting the new
wastes codes. Because EPA must
implement this rule until the state is
authorized to do so, the permittee must
comply with federal permit modification
procedures under 40 CFR 270.42 rather
than state permit modification
procedures. However, because the
permit undergoing modification is most
likely a joint EPA-state RCRA permit, a
copy of the modification request should
also be submitted to the authorized
state. Similarly, interim status facilities
must submit a revised part A permit
application to EPA pursuant to 40 CFR
270.72, with a copy to state permitting
authorities. Although these facilities
must make appropriate waste code
modifications to reflect the new TC
constituents, the wastes are already
regulated as EP wastes under the
authorized state program. Accordingly,
such wastes are not subject to any new
management requirements as a result of
this rule and must continue to comply
with appropriate authorized state
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OSWER DIR. MO. 9541.00-14
Federal Register / Vol. 55. No. 61 / Thursday. March 29, 1990 / Rules and Regulations 11849
requirements for management of these
wastes.
Some permitted and interim status
facilities in authorized states will be
managing wastes which will become
hazardous as a result of today's rule.
These facilities must-also submit permit
modifications or part A permit
application revisions to EPA, However,
because these wastes were previously
unregulated under RCRA. they also
were not regulated under the authorized
state program. As a result, if these
wastes are in a previously unregulated
unit, they will be subject to the self-
implementing Federal standards for
hazardous wastes management at 40
CFR part 265 until permit issuance (for
interim status facilities) or modification
(for permitted facilities). After permit
issuance or modification, the Federal
permitting standards at 40 CFR part 264
will apply to these wastes (or the state
permitting standards if the permit is
ultimately issued or modified by a state
authorized for the TC), However, if the
wastes are at a permitted facility in a
unit that is already regulated, that unit
will continue to comply with the
applicable 40 CFR part 264 (or state
equivalent) standards.
Facilities in authorized states which
are newly subject to RCRA permit
requirements as a result of today's rule
must obtain an EPA identification
number and submit their part A permit
application and section 3010 notification
to EPA in order to obtain interim status
(see 40 CFR 270.70). Such facilities are
subject to regulation under 40 CFR part
26S until a permit is issued by EPA or a
state authorized for the TC.
2. Facilities Located in Unauthorized
States
There are also three types of facilities
located in unauthorized states which are
affected by today's rule: already
permitted facilities, facilities operating
under interim status, and facilities
newly subject to RCRA permit
requirements under today's rule. As in
authorized states, some of the permitted
and interim status facilities have been
managing EPTC wastes.
For interim status and permitted
facilities which have been managing
EPTC wastes that will exhibit no new
constituents as a result of the
replacement of the EP with the.TCLP
and the addition of constituents to the
TC, there will be no waste code
changes. Accordingly, such facilities do
not need to submit permit modifications
or revised permit applications to EPA
and will continue to be subject to the
applicable federal standards for
hazardous wastp management.
Facilities which have been managing
EPTC wastes which exhibit the toxicity
characteristic for new constituents as a
result of today's changes to the TC must
notify EPA of the waste code changes
for its TC wastes. Permitted facilities
must submit permit modifications to
EPA as required under 40 CFR 270.42
that reflect the new wastes codes.
Interim status facilities must submit
'revised part A permit applications in
accordance with 40 CFR 270.72. These
facilities must continue to comply with
the applicable federal standards for
hazardous waste management.
Permitted and interim status facilities
which manage waste that is newly
defined as hazardous waste as a result
of today's rule must also submit permit
modification requests or part A permit
application revisions to EPA. Facilities
must manage these wastes in
accordance with 40 CFR part 265 or 40
CFR part 264 until permit modification
or issuance, depending on whether the
waste is managed in a newly regulated
or previously regulated unit.
Facilities which are newly subject to
RCRA permit requirements as a result of
today's rule must get an EPA
identification number and a part A
permit application to EPA in order to
obtain interim status. Such facilities are
subject to regulation under 40 CFR part
265 until a permit is issued.
C, Notification
Pursuant to RCRA section 3010, the
Administrator may require all persons
who handle hazardous wastes to notify
EPA of their hazardous waste
management activities within 90 days
after the wastes are identified or listed
as hazardous. This requirement may be
applied even to those generators,
transporters, and TSDFs who have
previously notified EPA with respect to
the management of other hazardous
wastes.
In the June 13,1986, Federal Register
notice, EPA proposed to waive the
notification requirement for persons
who manage TC wastes and have
already (1) notified the Agency that they
manage other hazardous wastes and (2)
received an EPA identification number.
EPA has decided to waive the
notification requirement as proposed.
The Agency believes that, given the vast
scope of the TC rale, a notification
requirement for persons already
identified within the hazardous waste
management universe is unnecessary,
EPA is not waiving the notification
requirement for TC waste handlers that
have neither notified the Agency that
they manage hazardous wastes nor
received an EPA identification number.
Those persons must notify EPA no later
than June 27,1990 of these activities
pursuant to section 3010 of RCRA.
Notification instructions are set forth in
45 FR12748, February 26,1980.
D, Permitting
Currently permitted facilities that
manage TC wastes must submit Class 1
permit modifications if they are to
continue managing the newly regulated
wastes in units that require a permit.
The facilities must obtain the necessary
modification by the effective date of the
rule, or they will be prohibited from
accepting additional TC wastes.
Interim status facilities that manage
TC wastes in units that require a permit
must file an amended part A permit
application under 40 CFR 270.10fg) if
they are to continue managing newly
regulated wastes. The facilities must file
the necessary amendments by the
effective date of the rule, or they will not
receive interim status with respect to the
TC wastes [i.e., they will be prohibited
from accepting additional TC wastes
until permitted).
Newly regulated facilities (i.e.,
facilities at which the only hazardous
wastes that are managed are newly
regulated TC wastes) must qualify for
interim status by the compliance date of
the rule in order to continue managing
TC wastes prior to receiving a permit.
Under 40 CFR 270.70, an existing facility
may obtain interim status by getting an
EPA identification number and
submitting a part A permit application.
To retain interim status, a newly-
regulated land disposal facility must
submit a part B permit application
within one year after the effective date
of the rule and certify that the facility is
in compliance with aO applicable ground
water monitoring and financial
responsibility requirements (see RCRA
section 3005(e)f3)).
EPA recently promulgated
amendments to the procedures for
permit modifications for treatment,
storage, and disposal facilities (see 53
FR 37934, September 28,1988). The
following discussion assumes
implementation in accordance with the
new rule. EPA will implement the TC by
using the new permit modification
procedures, consistent with EPA policy
(see 53 FR 37933, September 28,1986).
Under the new regulation in i 270.42.
there are now three classes of permit
modifications with different submittal
and public participation requirements
for each class. In § 270.42(g), which
concerns newly listed or identified
wastes, a permitted facility that is "in
existence" as a hazardous waste facility
for the newly listed or identified waste
on the effective date of the notice must
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11850 Federal Register / Vol. 55, No. 61 / Thursday. March 29. 1990 / Rules and Regulations
submit a Class 1 modification by that
date. Essentially, this modification is a
notification to the Agency that the
facility is handling the waste. As part of
the procedure, the permittee must also
notify the public within 90 days of
submittal to tfie Agency.
Next, within 180 days of the effective
date, the permittee must submit a Class
2 or 3 modification to the Agency. A
permittee may submit a Class 2
modification if the newly regulated
waste will be disposed in existing TSD
units and will not require additional or
different management practices from
those authorized in the permit. A Class 2
modification requires public notice by
the facility owner of the modification
request, a 60 day public comment
period, and an informal meeting
between the owner and the public
within the 60 day period. The rule
includes a "default provision," so that
for Class 2 modifications, if the Agency
does not make a decision within 120
days, the modification is automatically
authorized for 180 days. If the Agency
does not reach a decision by the end cf
that period, the modification is
permanently authorized. If the newly
regulated waste requires additional or
different management practices, a Class
3 modification is required. The initial
public notification and public meeting
requirements are the same as for Class
2. However, after the end of the public
comment period, the Agency will
develop a draft permit modification,
open a public comment period of 45
days and hold a public hearing.
E. Compliance Date
The Agency is promulgating two
different compliance dates for two
different categories of TC waste
generators: (1) All generators of greater
than 100 and less than 1,000 kg/month of
hazardous waste (small-quantity
generators) must come into compliance
with subtitle C requirements for
management of their TC waste within
one year from today; and (2) all
generators of 1,000 kg/month or more of
hazardous waste and TSDFs are
required to comply with all subtitle C
requirements for TC wastes within six
months from today, on the effective date
of the rule. Thus the EPTC remains in
effect until six months after today's date
for large quantity generators and TSDFs,
and remains in effect for 12 months after
today's date for small quantity
generators. The generator quantity
refers to all of a generator's hazardous
waste, not just newly hazardous TC
waste.
Further discussion of the Agency's
reasons for promulgating an extended
compliance date for small-quantity
generators is provided in section III.K of
this preamble. In summary, the Agency
believes that allowing an additional six
months for small quantity generators to
come into full compliance with the TC
will serve two purposes. First, it will
allow the Agency time to educate small
quantity generators on the RCRA rules
while, at the same time, allowing the
Agency to focus immediate
implementation efforts on large volumes
of hazardous waste. Second, it will
provide the necessary time for small
quantity generators to comply with
subtitle C requirements as a result of the
TC.
VI. Regulatory Requirements
A. Introduction
This portion of the preamble discusses
the analyses required by Executive
Order No. 12291 and the Regulatory
Flexibility Act. The Agency is required
under the Executive Order to estimate
the costs, economic impacts, and
benefits of "major" rules by conducting
a regulatory impact analysis (RIA).
Recognizing the potential of the Toxicity
Characteristic (TC) rule to affect a broad
spectrum of American industry, EPA
prepared an RIA comparing several
regulatory alternatives. Based on the
results of this analysis, the Agency
concluded that this final regulation is a
major rule. Section VLB presents the
methodology and results of the RIA.
The Regulatory Flexibility Act
requires the Agency to assess small
business impacts resulting from
regulations. The analysis of small
business impacts indicated that the TC
rule would not have a significant impact
on small businesses, and therefore a
formal regulatory flexibility analysis
was not prepared. Section VI.C
addresses potential effects on small
businesses.
The Agency received many comments
on the RIA for the June 13,1986
proposal. A summary of comments,
along with Agency responses, is
included as section VI.D. Section VI.E
discusses requirements under the
Paperwork Reduction Act.
Details of the regulatory impact
analysis and small business analysis are
available in the RIA document for the
final rule (Ref. 8). This final rule was
submitted to the Office of Management
and Budget for review as required by
E.O. No. 12291.
B. Regulatory Impact Analysis
1. Executive Order No. 12291
Executive Order No. 12291 requires
EPA to assess the effect of Agency
actions during the development of
regulations. Such an assessment
consists of a quantification of the
potential costs, economic impacts, and
benefits of a rule, as well as a
description of any beneficial or adverse
effects that cannot be quantified in
monetary terms. In addition, Executive
Order No. 12291 requires that regulatory
agencies prepare a regulatory impact
analysis (RIA) for major rules. Major
rules are defined as those likely to result
in (1) an annual cost to the economy of
$100 million or more; (2) a major
increase in costs or prices for consumers
or individual industries; or (3) significant
adverse effects on competition,
employment, investment, innovation, or
international trade.
EPA prepared an RIA comparing the
final TC rule with several regulatory
alternatives. Based on the RIA, EPA
estimates that the final TC rule is a
major rule with annual compliance costs
of between $130 million and $400
million. The analysis was conducted
based on the Office of Management and
Budget's "Interim Regulatory Impact
Analysis Guidance" and EPA's
"Guidelines for Performing Regulatory
Impact Analyses."
2. Basic Approach
In the final rule, EPA is amending its
hazardous waste identification
regulations under Subtitle C of the
Resource Conservation and Recovery
Act (RCRA) by refining and expanding
the existing Extraction Procedure
Toxicity Characteristic (EPTC). The
resulting TC includes a new extraction
procedure (the Toxicity Characteristic
Leaching Procedure or TCLP) and 25
new organic constituents in addition to
the 14 existing EPTC constituents.
Wastes exhibiting the TC, based on
concentrations of constituents in the
TCLP extract, are designated as
hazardous wastes and are brought under
subtitle C regulation.
EPA estimated the costs, economic
impacts, and benefits of the final rule
and of a number of major regulatory
alternatives to the rule. Only the
anticipated effects of the final rule are
presented in this preamble; results for
the regulatory alternatives are discussed
in the RIA. In presenting the results of
the analysis, the Agency has presented
range estimates for costs, economic
impacts, and benefits to express the
uncertainty associated with certain
analytical assumptions.
In order to gauge the effects of the
final rule, EPA first identified wastes
and industries which would be affected
by the rule. Incremental costs for
affected facilities were estimated based
on the change in waste management
practices which would be required once
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OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55, No, 61 / Thursday, March 29, 1990 / Rules and Regulations 11851
the wastes became hazardous. These
incremental costs were aggregated to
estimate national costs of the rule.
Economic impacts on facilities were
based on a comparison of facility
compliance costs with costs of
production and cash from operations.
The potential for facility closures was
also examined.
Benefits, like costs, were based on
required changes in waste management
practices. Benefit measures included
human health risk reduction, resource
damage reduction, and cleanup costs
avoided. Facility-level benefit estimates
were aggregated to obtain national
benefits.
• Section VI.B.3, below, presents the
methodology used to estimate costs,
economic impacts, and benefits. It also
briefly describes the sensitivity analyses
that were conducted to determine the
significance of key analytical
assumptions; these sensitivity analyses
are discussed in more detail in the RIA,
Limitations of the analytical approach
(e.g., assumptions which are likely to
overstate, understate, or create
uncertainty in results) are discussed in
the R1A. Results of the analysis of costs,
economic impacts, and benefits are
provided in section VLB.4,
3. Methodology
The methodology for the RIA is
presented in several parts. First, the
procedure for identifying wastes and
facilities affected by the TC is
discussed. Next, the development of
national cost estimates is presented. The
section on economic impact
methodology describes the criteria used
In gauging impacts on the regulated
community. Following that is a section
that presents several alternative
measures of benefits of the rule. The last
section describes the methodology for
analysis of used oil.
a. Determination of Affected Wastes
and Facilities. The first step in
estimating the impacts of the rule was to
determine which wastes and facilities
would be affected by the rule, based on
waste characteristics, quantities, and
management practices. No single data
source caciained all of this information,
and none of the data were facility-
specific. Therefore, the Agency
assembled aggregated data (e.g., by
industrial sector) from separate sources
and used it to draw inferences on
facility-level impacts.
Data en waste characterization and
volume ca_ne primarily from a series of
TC industry studies. (Ref. 19 through 29)
These staizss were conducted for major
industria.1 categories identified as likely
to genera:* significant quantities of TC
wastes; -~gr sectors, generating smaller
quantities of potentially affected waste,
were not addressed. Standard Industrial
Classifications (SICs) for the industrial
sectors studied range between the two-
digit and four-digit levels. The industries
profiled are shown in Table VI-1.
TABLE VI-1 .—POTENTIALLY AFFECTED IN-
DUSTRIES CONSIDERED IN RiAs FOR
THE PROPOSED AND FINAL TC RULES
Industry
Textile Mills '
Lumber and Wood
Products.2
Pulp and Paper * ....
Printing and
Publishing.
Plastics Materials
and Hesins.*
Synthetic
Rubber.'.
Synthetic Fibers.3
Pharmaceuticals.3...
Cetargents.
Surface Active
Agents.
Paints and Allied
Products.
Organic
Chemicals.*
Agricultural
Chemicals.
Petroleum
Refining.2
Miscellaneous
Petroleum and
Coal Products.'
Rubber and
Miscellaneous
Plastics
Products.1
Non-Ferrous Wire
Drawing and
Insulation.
Machinery and
Mechanical
Products.
Pipelines, except
Natural Gas.1
Electrical Services ..
Wholesale
Petroleum
Marketing.*
SIC«
22
2421, 249i
261 , 262, 263,
288.
27
2821 .
2822
2823, 2824...
283
2841... . _
2843
2851
2865, 2369.......
2879
2911 .....
2992
30
3357
34 through 39..
461 .._ _
491 1
517
Pro-
posed
X
X
X
x
x
x
X
X
X
x
Final
X
x
X
x
x
x
x
X
X
X
X
X
x
x
x
x
1 SICs listed are those defining the group consid-
ered in this analysis. SICs given at trie Two-digit or
three-digit SIC level indicate that the analysis applies
to all four-digit SICs contained wimm the broader
category
1 included in detailed quantitative analysis for the
final RIA.
The industry studies provided data
including waste type (wastewater,
sludge, solid process residual, or organic
liquid), waste quantity, constituent
concentration ranges and distributions,
and number of generating facilities. The
data in the studies were based primarily
on EPA's effluent guidelines reports,
supplemented by best engineering
judgement and data received in
comments on the proposed rule or in
follow-up correspondence (Refs. 30 and
31). Most of the wastes which were
included were related to wastewater
treatment; there was relatively little
data on process residuals. Wastes which
were already hazardous by virtue of a
listing or characteristic (e.g., the EPTC)
were not included. Due to lack of data,
certain types of wastes were not
included in the analysis (e.g..
contaminated soil, off-spec products,
contaminated debris).
It is particularly difficult to predict the
behavior of oily wastes in the TCLP test.
For the purpose of deriving upper bound
estimates of costs, economic impacts,
and benefits, one assumption that EPA
adopted was that oily non-liquid wastes
would not present filtration problems in
the TCLP (i.e., that the oily phase passes
'through the filter and hazardous
constituents in the oil phase leach to the
test extract) and that if extract
concentrations exceeded regulatory
levels, these wastes would fail the TC.
As a basis for lower bound estimates for
costs, economic impacts and benefits.
the Agency assumed that no oily wastes
will be caught by TC regulation because
the oily phase (and corresponding high
levels of toxic constituents) would not
filter through to the extract in the TCLP.
Due to the lack of facility-specific
waste generation data, certain
assumptions had to be made to derive
the quantity of each wastestream per
facility. First, potentially affected
facilities within each industrial sector
were split between small (with less than
50 employees) and large (with 50
employees or more) facility size
categories based on 1932 Census of
Manufacturers data on the number of
facilities by size category. (The 1982
Census data were the most recent
available.) Second, the total quantity of
potentially affected waste was
distributed between small and large
facilities based on Census of
Manufacturers data on the value of
shipments for the small and large size
categories. Using the distribution of
facilities and of total waste quantity
between small and large size categories,
EPA estimated wastestream quantity
per facility for small and large facilities.
EPA conducted a sensitivity analysis
in order to test the sensitivity of results
to the assumed distribution of wastes
based on value of shipments. Since the
division of waste quantities based on
value of shipments resulted in most
waste being generated by large
facilities, EPA tested the alternative
assumption that waste quantities were
split evenly between the large and small
facility size categories in each industry.
(Results of sensitivity analyses are
presented in section VI.B.4.)
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11852 Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations
Baseline management practices (i.e.,
management practices in the absence of
the regulation) were derived primarily
from the Screening Survey of Industrial
subtitle D Establishments. (Ref. 16.) This
survey provided information on the
percent of facilities, by industrial sector,
which manage non-hazardous wastes
on-site in landfills, surface
impoundments, waste piles, and land
application units. Other baseline
management practices were not
specifically identified in the survey;
therefore, EPA had to use knowledge of
potentially affected TC wastes to
identify these other practices and
estimate the percentage of facilities
using them.
In the case of non-wastewaters, the
other practices considered included
management in off-site landfills and
land application units. For wastswaters,
the other baseline practices included
management in tanks as part of a
wastewater treatment system, direct
discharge under a NPDE3 permit, or
indirect discharge to a Publicly Owned
Treatment Works. These other
wastewater management practices were
assumed to be permissible under
subtitle C therefore it was assumed that
facilities using these practices for
wastes which were identified as
hazardous by the TC would not be
affected by the TC rule. EPA examined
the sensitivity of results to this
assumption by assuming, alternatively,
that all wastewaters were managed on
site in subtitle D surface impoundments.
For organic liquids, EPA determined,
based on the Office of Solid Waste's
Industry Studies Database, that the most
likely baseline management practices
were recycling and burning. EPA
assumed that incremental management
costs for these wastes would not be
significant and therefore did not include
the wastes in the analysis.
By combining the waste
characterization and volume data with
the management practice data, it was
possible to estimate, by industrial
sector, the amount of waste and the
number of facilities potentially affected
by theTC.
In order to determine the quantity of
each wastestream which would be
affected by the TC, the regulatory levels
for constituents in the waste were
compared with the estimated
concentration distributions, derived
from the TC industry studies, for
constituents in the waste leachate. The
constituent which caused the largest
percentage of the wastestream to fail the
TC was designated as the "cost-driving"
constituent, and the quantity exhibiting
the TC due to the presence of that
constituent was used as the affected
quantity. EPA tested the sensitivity of
results to the assumption that waste
would fail for a single driving
constituent by adding the percentages
failing for all constituents (up to 100
percent).
Due to the lack of facility-specific
data, it was assumed that the
percentage of facilities affected by the
TC for a particular wastestream would
equal die percentage of the total waste
failing the TC. (For example, if 25
percent of a wastestream failed, it was
assumed that 25 percent of the facilities
generating the waste would be affected
and that all of the wastestream at each
affected facility would fail.) In order to
test the importance of this assumption,
EPA adopted two alternative
assumptions as sensitivity analyses: for
any percentage of waste failing (except
for 0 and 100 percent, where claarly no
facilities or all facilities would be
affected), the percentage of facilities
affected would be 10 percent or,
alternatively, 90 percent.
The effects of potential production
process changes in response to the rule
were not addressed.
b. Cost Methodology. EPA estimated
both the social costs and the compliance
costs cf the final rule. Social costs do
not include transfer payments between
different parties within society (i.e., they
do not include tax payments or above-
average profits); the social costs
therefore represent the real resource
costs imposed by the rule on society as
a whole. Compliance costs, which
include the effects of taxes and above-
average profits, more accurately reflect
the effect of the rale on particular
entities within society.
1. Social Costs
EPA estimated the national social
costs of the final rule by calculating
before-tax incremental management
costs for affected wastes at model
facilities and then summing the facility
costs across industrial sectors.
Before-tax incremental costs were
calculated by subtracting baseline
management costs from post-regulatory
costs. Baseline management practices
were determined as discussed
previously. Post-regulatory management
practices were developed based on
waste types and quantities; the least-
cost practice among those feasible for a
waste was chosen as discussed below.
The post-regulatory practices did not
include potential waste treatment
practices under the land disposal
restrictions program since land disposal
restrictions requirements for TC wastes
will not come into effect until after the
TC rale is promulgated. Possible post-
regulatory management practices, as
well as baseline practices, for TC
wastes are shown in Table VI-2.
TABLE VI-2.—BASEUNE AND POST-
REGULATOBY MANAGEMENT PRACTICES
Waste typo
Wasteweter
Non-
wastewatar.
Organic liquid
Baseline
practice
On-site Subtitle
D surf ace
impoundment
or
Practice
parmissit!3
under
SubStlaA
Ovsna Subtitla
D landfill or
land
application
unit or ctf-ste
Subtitle D
landfill.
Burning,
recycling.
Post-regulatory
practice
On-site tank
exempt from
Subtitle C,
Subtitle C
surface
impound-
ment.1
Same as
baseline.1
On-slte or oft-
srte SubrHSa
C landfiU or
land
application
unit
Same as
baseline.1
1 Dilution and deep-welt injection were also con-
sidered as post-requialory practices but were found
to be more expensive man tank management
•Includes management in Subtitle C-exempI
tanks, direct discharge under a NPDES permit or
indirect discharge to * Publicly Owned Treatment
Works.
9 Since the post-regulatory practice was me sane
as the baseline practice, in* rule would not afiact
management of these waste*.
To estimate before-tax baseline and
post-regulatory costs for wastes, EPA
first estimated the cost per metric ton
for the different on-site and off-Bits
waste management practices. Before-tax
costs for on-site management units
include operation and maintenance
(O&M] and capital costs. O&M costs are
incurred annually for operation and
maintenance of waste treatment or
disposal units. Capital costs include
costs for construction of the unit and for
depreciable assets; these costs, which
assumed an average operating life of 20
years, were restated as annual values
by using a capital recovery factor based
on a discount rate of three percent.
RCRA-related costs such as personnel
training, financial assurance, and
liability insurance were included as
indirect capital costs.
For the subset of subtitle D facilities
which could potentially become subtitle
C TSDFs in order to manage TC wastes
on-site, post-regulatory costs for on-site
management also included corrective
action costs. Corrective action costs for
units were based on data from the to-be-
proposed corrective action subpart S
rule RIA, which indicated the
probability of a unit requiring a RCRA
facility assessment, RCRA. facility
investigation, and corrective action
cleanup. Corrective action costs were
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not assigned to facilities which were
determined to already be subtitle C
treatment, storage, and disposal
facilities, since units at these facilities
would already be subject to corrective
action requirements under subparts S
and F. Like capital costs, corrective
action costs were converted to annual
values.
The annualized capital and (as
appropriate) corrective action costs
were added to yearly O&M costs to
derive overall annualized costs for on-
site units of various sizes. These
annualized costs were then divided by
the waste management capacities of the
units to obtain the costs per metric ton
for on-site management in different
units.
Off-site management costs were
based on commercial hazardous waste
management prices, adjusted for the
effects of above-average profits.
Shipping costs were included for wastes
sent off-site. Neither the on-site nor off-
site costs included the cost of waste
testing.
Since no data were available on the
combinations of wastestreams
generated at particular facilities, EPA
used an algorithm to create model
facilities. In estimating costs for the .
model facilities, wastes that were
amenable to co-management were
grouped to identify economies of scale.
Once the costs per metric ton for
different types of on-site and off-site
management had been developed and
waste quantities for the model facilities
had been determined, EPA estimated
each facility's baseline cost based on
the quantities of waste and the cost per
metric ton for the baseline management
practices identified for the wastes. The
post-regulatory cost for each facility
was estimated in a similar way. The
post-regulatory management practices
for facilities were selected by comparing
the cost per metric' ton for different
feasible post-regulatory practices for
wastes and selecting the least expensive
alternative. (This comparison was made
based on compliance costs, rather than
social costs, as discussed below). EPA
then subtracted baseline costs from
post-regulatory costs to obtain the
before-lax incremental cost for each
facility. These before-tax incremental
costs were then added across industrial
sectors to obtain the total (national]
social costs of the rule.
EPA examined the possibility that.
some facilities managing wastewaters
would incur costs over and above the
cost of switching from management in
unlined surface impoundments to
management in wastewater treatment
tanks that are exempt from subtitle C.
To calculate upper bound costs, the
Agency assumed that facilities
generating large quantities of TC
wastewater (over 400,000 metric tons
per year) would not be able to convert
existing'non-hazardous surface
impoundments to tanks by the effective
date of the rule (i.e., October 1.1990)
and therefore would become interim
status facilities under RCRA and subject
to subtitle C closure of any
impoundments. The upper bound cost
estimates included costs for subtitle C
"landfill closure" of the surface
impoundments currently used to manage
TC waste. Costs for surface
impoundment subtitle C closure
included pumping of free liquid,
solidification of sludges, construction of
a cover system, installation of
upgradient and downgradient ground
water monitoring wells, closure
certification, and potential corrective
action costs triggered by bringing
facilities with TC surface impoundments
into the subtitle C system,
2. Compliance Costs
EPA used the same basic approach to
estimate compliance costs that was used
to estimate social costs except that the
after-tax costs (or revenue
requirements) of management practices
were used rather than the before-tax
costs, and the price of off-site
management was used rather than the
cost of off-site management (to address
above-average profits). Since the
compliance costs reflect the cost of the
rule for particular entities within society
more accurately than the social costs do,
compliance costs were used in
determining whether it would be less
expensive for facilities to use on-site or
off-site post-regulatory management
practices.
Based on the cost analysis discussed
above, EPA estimated the number of
existing subtitle C treatment, storage,
and disposal facilities (TSDFs) electing
to manage TC non-wastewaters on site
and the number of subtitle D facilities
which would be likely to become
subtitle C TSDFs in order to manage
their non-wastewaters on-site. (The
focus was on on-site management of
non-wastewaters, since it was assumed
that most facilities would be able to
manage wastewaters on site without
becoming subtitle C TSDFs.) This was
done by first determining the number of
facilities that would be likely to choose
on-site management as the least-cost
management practice for non-
wastewaters and then estimating how
many of these would be likely to already
be subtitle C TSDFs. EPA also estimated
the number of new subtitle C generators,
by determining how many facilities
would generate in excess of 100
kilograms per month of TC waste and
then calculating how many of these
facilities would be likely to already be
subtitle C generators.
c. Economic Impact Methodology. To
gauge impacts, EPA compared
compliance costs (discussed previously)
with average facility costs of production
and with cash from operations.
Financial data were obtained primarily
from the Census and Annual Survey of
Manufacturers (.U.S. Department of
Commerce, Bureau of Census) and were
organized by Standard Industrial
Classification (SIC) code and facility
size. Impacts were estimated at the
facility level rather than the firm level,
due to lack of data on specific facilities
and the firms owning them.
Two ratios were used to identify
facilities likely to experience adverse
economic effects: compliance cost
divided by cost of production (the COP
ratio) and cash from operations divided
by compliance cost (the CFO ratio).
These ratios bound possible effects on
individual facilities by examining
impacts assuming complete pass-
through of compliance costs to
customers, on the one hand, and
assuming no pass-through of costs, on
the other. The COP ratio represents the
percentage product price increase for
facility output that would be necessary
if the entire compliance cost.
accompanied by facility profit, were to
be passed through to customers in the
form of higher prices. A change
exceeding five percent is considered an
indication of a significant adverse
economic impact on a facility. The CFO
ratio represents the number of times that
a facility's gross margin (profi*) would
cover the compliance cost if the facility
were to fully absorb the cost. For this
ratio, a value of less than 20 is
considered to represent a significant
adverse impact.
EPA then performed an analysis on
the facilities experiencing significant
economic impacts to identify the
potential for facility closures. Those
facilities for which the CFO ratio was
less than two were considered likely to
close.
Impacts on significantly affected
product markets were addressed
qualitatively by examining market
structure and the ability of facilities to
pass compliance costs on to customers.
d. Benefits Methodology. The benefits
of the final rule were evaluated by
considering the reduction in human
health risk, the reduction in resource
damage, and future cleanup costs
avoided that would result from required
changes in management practices for
affected wastes. These benefits
. it
*, M
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11854 Federal Register / Vol. 55. No. 61 / Thursday, March 29, 1990 / Rules and Regulations
measures centered primarily on the
exposure to contaminants via the
ground water medium, since this was
the route of exposure addressed by the
TC rule; however, a screening analysis
of risks via air, due to emissions from
surface impoundments, was also
conducted to gauge the significance of
these risks.
It is important to point out that the
benefits measures should not be added.
The measures provide alternative ways
of evaluating benefits of the rule, and
significant overlap between measures
does occur.
EPA estimated benefits on a
wastestream-by-wastestream basis. To
simplify the analysis of benefits. EPA
employed a screening analysis to
identify two "risk-driving" constituents
in each wastestream, one a carcinogen
and one a non-carcinogen. These
constituents were then used in
developing benefit estimates.
A Monte Carlo modeling approach
was used to simulate fate and transport
of the constituents and subsequent
exposure to them under a variety of
waste characterizations, hydrogeologic
settings, and exposure scenarios. Based
on data from EPA's National Survey of
Solid Waste Municipal Landfill
Facilities (the "Municipal Landfill
Survey"), it was assumed that only 46
percent of facilities had down-gradient
wells. EPA examined the sensitivity of
results to this assumption by assuming,
alternatively, that all facilities had
down-gradient wells.
Due to the way in which fate and
transport of constituents was modeled
(using an infinite source, steady-state
model), benefits estimates were
primarily a function of the number of
facilities estimated to manage each
wastestream and constituent
concentrations in the waste; •
wastestream volumes did not affect
benefits estimates. In contrast, cost
analysis results were a function of the
number of facilities, waste constituent
concentrations, and wastestream
volumes.
Worst-case estimates of baseline risk,
resource damage, and cleanup costs
were developed by assuming that the
baseline management practice for both
wastewaters and non-wastewaters was
an unlined, non-hazardous waste
landfill. This is the same assumption
that was employed by the Agency in
determining regulatory levels for TC
constituents. Post-regulatory risk,
resource damage, and cleanup costs
were estimated by assuming that the
wastes managed as hazardous under the
TC would be effectively prevented from
contaminating ground water and would
therefore result in no risk, resource
damage, or cleanup costs; only those
wastes continuing to be managed as
non-hazardous would pose a threat to
human health or the environment.
For wastewaters, the baseline risk,
resource damage, and cleanup cost due
to ground water contamination were
based on concentrations of constituents
in the influents to waste management
units. Consequently, since volatilization
of constituents from waste management
units was not accounted for, benefits
due to reduction in ground water
contamination may be overstated.
The three benefits measures used in
this analysis are discussed separately
below,
1. Human Health Risk Reduction
EPA estimated two types of human
health risk: risk to the most exposed
individual (MET) and population risk.
Human health risk is defined herein as
the probability of injury, disease, or
death over a given time (70 years) due to
responses to doses of disease-causing
agents. The human health risk posed by
a waste management practice is a
function of the toxicity of the chemical
constituents in the wastestream and the
extent of human exposure to the
constituents. The likelihood of exposure
is dictated by hydrogeologic and
climatic settings at land disposal units
and by the fate and transport of
chemical constituents in environmental
media.
a, MEI Risk Reduction, MEI risk was
based on exposure to the risk-driving
constituents. Concentrations of the risk-
driving constituents in the waste
leachate were selected randomly from
the constituents' concentration
distributions. A dilution-attenuation
factor (DAFJ, derived from EPA's
subsurface fate and transport model
[EPACML). was then randomly selected
and used to model the fate and transport
of the constituents in ground water. (The
DAFs were developed using data from
the Municipal Landfill Survey on landfill
size, hydrogeology, and distance from
the unit to the closest drinking water
well; see section III.E for further
discussion of the model.) By dividing the
initial leachate concentrations of the
risk-driving constituents by the DAF,
exposure concentrations at a down-
gradient well were estimated. Risks
from ingestion of contaminated ground
water were then calculated. The
carcinogenic MEI risk was expressed as
the probability of the MEI contracting
cancer over a 70-year lifetime, and the
non-carcinogenic MEI risk was
expressed as an exceedance of the
health-effects threshold.
Risk estimates were developed in this
way for baseline conditions and for the
final rule. The difference between the
final rule and baseline risk estimate"
yielded the MEI risk reduction (or
benefit).
EPA conducted a separate screening
analysis of baseline MEI risks due to air
emissions from surface impoundments
in order to assess whether potential air
risks were significant. This was done by
assuming that constituents in
wastewaters would potentially
volatilize to the air rather than leach to
ground water. EPA's Liner Location
Model (Ref. 32) was used to estimate
concentrations of constituents at an
exposure point 200 meters from the edge
of the surface impoundment. Both
carcinogenic and non-carcinogenic risks
were estimated.
b. Population Risk Reduction.
Population risk was estimated in much
the same way as MEI risk, with the
exception that ground water plume
areas for risk-driving constituents were
used to model the exposure of
populations located downgradient from
units. The plume areas were developed
for a representative hydrogeologic
environment, based on data from the
Municipal Landfill Survey.
Each plume area contained a gradient
of exposure concentrations, with the
highest concentration near the unit
boundary and the lowest concentration
near the outside edge of the plume. By
assuming a uniform population density
of 1.8 persons per acre, based on the
Municipal Landfill Survey, it was
possible to estimate the number of
persons exposed to each of the
concentration levels within each plume.
The population risk for the
carcinogenic constituent, based on the
constituent's risk-specific dose (RSD),
was expressed as the number of cancer
cases over a 70-year lifetime. The
population risk for the non-carcinogenic
constituent, based on the constituent's
reference dose (RfO), was expressed as
the number of persons exposed to
average daily concentrations exceeding
the RfD over a 70-year period.
2, Resource Damage Avoided
Resource damage measures the cost
associated with replacing contaminated
ground water that had been used as a
source of drinking water. Resource
damage was assumed to result from any
contamination of ground water which
would render it unsuitable for human
consumption; other potential foregone
uses, such as industrial or agricultural
uses, were not addressed.
If the concentration of a constituent in
ground water exceeded a maximum
contaminant level (MCL), the ground
water was assumed to be damaged. If
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the contaminant did not have an MCL
but the concentration exceeded a taste
and odor threshold or a health effects
threshold, the ground water was also
assumed to be damaged. Areas of
damaged ground water were derived
based on a comparison of the
constituent's concentration within the
plume with the constituent's MCL, taste
and odor threshold, or health-based
number, in an approach similar to that
used to estimate plume areas for
population risk.
To place a value on the damaged
resource, EPA assumed that an
alternative water supply system would
have to be built to provide water to
persons living above the area of the
damaged ground water. The costs of
constructing the water supply system
included capital and O&M costs; these
costs were discounted to the present at
a rate of three percent to obtain the
resource damage per facility. Addition
of resource damage across facilities
provided a national estimate.
3. Cleanup Costs Avoided
As an alternative measure of benefits,
EPA estimated the cleanup costs
avoided as a result of the TC rule. Costs
of cleanup of contaminated ground
water were estimated by assuming that
sites with resource damage in the
baseline would eventually require
cleanups. To develop an upper bound
estimate, it was assumed that sites with
resource damage greater than $1.000,000
(present value] would require cleanup.
Cleanup costs were based on an
average cost of $15 million per site, with
cleanups beginning in 15 years. EPA
estimated the average cost of cleanup
by examining recent Superfund records
of decision (RODs) for sites
contaminated with TC constituents that
required substantial ground water
cleanup efforts. Costs were discounted
to present values using a discount rate
of three percent.
e. Used Oil Methodology. EPA
addressed the impacts of the TC on used
oil separately from other wastes for
several reasons. First, used oil is
generated across a wide variety of
industrial sectors. Second, unlike other
wastes, it has economic value and can
be sold in intermediate or end-use
markets; this complicates any analysis
of the costs of regulating it as a
hazardous waste. Also, data on used oil
are quite limited. Finally, it is difficult to
accurately estimate quantities of used
oil that may exhibit the TC because in
practice TCLP filtration is sample-
specific and difficult to predict.
The analysis of costs, economic
impacts, and benefits associated with
used oi) was qualitative in nature: no
attempt was made to develop national
estimates. In determining the quantity of
used oil potentially affected, EPA
excluded used oil that was: (I) Already
hazardous because it exhibits a
hazardous waste characteristic (e.g.,
ignitability); (2) recycled; or (3)
generated by "do-it-yourselfers" (i.e.,
auto owners disposing of crankcase oil).
In order to develop worst-case estimates
of impacts on used oil, it was assumed
that used oil would filter in the TCLP. It
was also assumed that the facilities
managing used oil were subtitle D
facilities. Finally, estimated impacts on
used oil did not account for the possible
stigma associated with management of
used oil as a hazardous waste.
4. Results
Results of the RIA are presented
below. These results are approximations
that are intended to identify the most
significant impacts of the TC rule. As
discussed previously, there were no
data on the waste types and quantities
generated by specific facilities in the
different industrial sectors. Therefore,
EPA used more aggregated data and
focused on those industrial sectors
which were most likely to generate
significant quantities of TC wastes.
a. Affected Wastes and Facilities.
EPA estimated the amount of waste and
the number of facilities that would be
"affected" by the rule, i.e., that would
incur any incremental costs due to
required changes in management
practices for newly hazardous wastes.
1. Affected Wastes
The overall quantity of waste affected
by the TC was driven by wastewaters.
EPA estimated the quantity of affected
wastewaters to be approximately 730
million metric tons (MMT) per year and
the quantity of affected non-
wastewaters (sludges and solids) would
range from approximately 0.85 MMT/
year to 1.8 MMT/year. It should be
noted that the affected wastewaters,
which would be hazardous wastes, are
assumed to be exempt from subtitle C
regulation in the post-regulatory
scenario due to their management in
exempt tanks. However, they would be
affected wastes because a change in
management practice (from surface
impoundments to tanks) would be
required.
The industrial sectors with the largest
quantities of affected wastewaters were
Petroleum Refining (SIC 2911), Organic
Chemicals [SIC 286). Synthetic Rubber
(SIC 2822), and Cellulosic and Non-
Cellulosic Synthetic Fibers (SICs 2823
and 2824). For the lower bound estimate
of 0.85 MMT/year of non-wastewaters
affected, the sectors with the largest
quantities of affected non-wastewaters
were Pulp and Paper (SIC 26), Synthetic
Fibers, Organic Chemicals, and
Pharmaceuticals (SIC 283). For the upper
bound estimate of 1.8 MMT/year,
industry sectors generating the largest
quantities of affected non-wastewaters
were Petroleum Refining. Pulp and
Paper, Synthetic Fibers, Organic
Chemicals, and Wholesale Petroleum
Marketing (SIC 517). Certain sectors
generate significant quantities of both
wastewaters and non-wastewaters due
to the wastewater treatment sludges
associated with wastewater streams.
Most of the affected wastewaters and
non-wastewaters are believed to be
generated by large facilities.
A total of twelve constituents
appeared as "cost-driving" constituents
in the analysis. However, benzene was
the driving constituent for over 60
percent of the affected waste quantity.
Other volume-driving constituents
include chloroform (25%), vinyl chloride
(17%), and trichloroethylene (15%).
2. Affected Facilities
EPA estimated that between 15,000
and 17,000 generators would be affected
by the rule. Costs and additional
requirements among these affected
facilities will vary (e.g., some may
already be RCRA generators or TSDFs,
others may need to apply for RCRA
permits or send wastes off-site). Over 90
percent of these were small facilities
(with fewer than 50 employees). The
industries with the most affected large
facilities were Hosiery and Knit Fabric
Finishing (SIC 225). Wholesale
Petroleum Marketing, Organic
Chemicals. Petroleum Refining, and
Plastics Materials and Resins (SIC 2821).
The industries with the most affected
small facilities were Wholesale
Petroleum Marketing, Hosiery and Knit
Fabric Finishing, Miscellaneous
Petroleum and Coal Products (SIC 2992),
Organic Chemicals, and Plastics
Materials and Resins.
3. Sensitivity Analysis of Affected
Wastes and Facilities
Changes in certain analytical
assumptions had significant effects on
the quantity of waste and number of
facilities affected by the TC final rule.
(Refer to section VI.B.S.a for discussion
of the sensitivity analyses which were
conducted.} Some of the changes also
affected cost and benefit results, as
discussed below under cost results and
benefit results.
Assuming that oily wastes would not
filter in the TCLP, rather than assuming
that they would, would have a very
significant effect on the quantity of non-
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11856 Federal Register / Vol. 55, No. 61 / Thursday, March 29. 1990 / Rules and Regulations
wastewaters affected by the TC. This
effect can be seen in the difference
between lower bound (assuming oily
wastes do not filter] and upper bound
(assuming oily wastes filter without
complications) estimates of affected
quantities of non-wastewaters. Nearly
all of the non-wastewattrs from
Petroleum Refining (including a very
large-volume primary treatment sludge).
Wholesale Petroleum Marketing, and
Petroleum Pipelines are oily wastes.
Assuming that all wastewaters were
managed in surface impoundments,
rather than some portion being managed
by practices exempt under subtitle C,
increased affected wastewater quantity
significantly to approximately 1,900
MMT/year. It also increased the number
of facilities affected in certain sectors,
Finally, assuming that only 10 percent
of the facilities would be affected for a
waste failing the TC, rather than using
the percent of the waste failing,
significantly reduced the number of
facilities affected by the TC in most
industrial sectors.
, b. Cost Results—1. Social Costs and
Compliance Costs. EPA estimated the
total social costs of the TC rule
(excluding taxes and above-average
profits) to be approximately $90 million
to $310 million per year (present value
$1.3 billion to SS.7 billion); this does not
include costs associated with used oil.
Compliance costs (which include taxes
and above-average profits) ranged from
$130 million to S400 million per year
(present value $1.9 billion to $8.0
billion). While affected waste quantities
were driven by wastewaters,
compliance costs (for the scenario
where oily wastes fail the TC and no
surface impoundment closure costs are
incurred) were driven by non-
wastewaters due to the significantly
higher incremental costs of managing
non-wastewaters. Non-wastewaters
accounted for over 95 percent of
compliance costs.
For the lower bound cost estimate, the
industrial sectors with the largest
compliance costs were Pulp and Paper,
Synthetic Fibers, Organic Chemicals,
and Synthetic Rubber. For the upper
bound cost estimate, the industrial
sectors with the largest compliance
costs were Petroleum Refining, Pulp and
Paper, Synthetic Fibers, Wholesale
Petroleum Marketing, and Organic
Chemicals. Constituents driving the cost
results were: benzene, chloroform,
trichloroethylene, vinyl chloride, and
carbon tetra chloride.
Approximately 90 percent of the
compliance costs (for the scenario
where oily wastes fail the TC and no
surface impoundment closure costs are
incurred) were incurred by large
facilities and 10 percent by small
facilities across industrial sectors. A
relatively small number of large
facilities incurs the majority of
compliance costs because large facilities
are believed to have much greater waste
generation rates than small facilities.
The estimated number of subtitle D
facilities seeking permits to become non-
commercial subtitle C TSDFs was 40 to
250; this does not include facilities
seeking permits for storage or treatment
only. Most of the expected permit
applicants were in the Pulp and Paper
Industry in the lower bound estimate.
Most of these new TSDFs in the upper
bound estimate were in Petroleum
Refining.
The number of existing subtitle C non-
commercial TSDFs expected to seek
permit modifications to handle TC
wastes was between 45 and 220,
depending on whether permits are
considered for only disposal or for
treatment, storage, and disposal. Most of
these facilities in the upper bound
estimate were in the Wholesale
Petroleum Marketing and Petroleum
Refining industries.
The number of subtitle C commercial
TSDFs (SIC 4953) seeking permit
modifications or changes to interim
status could be as high as 360, the
estimated number of existing
commercial TSDFs. Many of these
commercial TSDFs are primarily storage
facilities.
In addition, the TC rule would result
in as many as 15,000 new subtitle C
generators. Most of the new generators
would be in Wholesale Petroleum
Marketing and Hosiery and Knit Fabric
Finishing.
2. Sensitivity Analysis of Costs.
Changes in certain analytical
assumptions had significant effects on
the social costs and compliance costs of
the TC final rule. (Refer to section
VI.B.3.3 for discussion of the sensitivity
analyses which were conducted.) Some
of the changes also affected benefit
results, as discussed below under
benefits results.
Assuming that oily wastes would not
filter in the TCLP, rather than assuming
that they would, would have a
significant effect on both social costs
and compliance costs. The Agency
estimated, as a lower bound assuming
that no oily wastes will fail the TC test,
social costs of about $80 million per year
and compliance costs of about $130
million per year. By comparison, if it
were assumed for the purpose of
predicting TCLP results that oily wastes
behave like other non-liquid wastes,
social costs would be $190 million per
year and compliance costs would be
$250 million per year.
Assuming that not all facilities would .
be able to convert within six months
from surface impoundments to tanks for
management of their TC wastewaters,
rather than assuming that all facilities
would be able to convert, significantly
increased the cost of the rule. Based on
landfill closure of impoundments, this
assumption added approximately S120
million to annual social costs and $140
million to annual compliance costs.
Splitting wastestream quantity evenly
between small and large facility size
categories, rathar than based on value of
shipments, shifted wastes from large to
small facilities. While this did not affect
the overall costs greatly, it significantly
decreased compliance costs for large
facilities and increased them for small
facilities.
Finally, assuming that only 10 percent
of the facilities would be affected for a
waste failing the TC, rather than using
the percent of the waste failing,
significantly reduced social costs and
compliance costs due to the larger
quantities of waste being managed at a
smaller number of facilities and the
resultant economies of scale. The
estimated number of new subtitle C
TSDFs, existing TSDFs seeking permit
modifications, and new subtitle C
generators also decreased significantly.
c. Economic Impact Results—1.
Significantly Affected Facilities. Based
on the economic impact criteria
discussed previously the estimated total
number of significantly affected
facilities was 65 to 81, of which most (51
to 66) are large. The fact that most of the
significantly affected facilities are large
can be partially explained by the fact
that data indicate there are no small
facilities in certain sectors (e.g.,
Cellulosic Synthetic Fibers). Another
reason for the preponderance of
significantly affected large facilities is
that for some wastes, total compliance
costs are less for small facilities than for
large facilities because large facilities
are believed to generate significantly
more waste.
In the lower bound estimates,
significantly affected facilities were
expected in four industrial sectors: Pulp
and Paper, Synthetic Rubber, Synthetic
Fibers, and Organic Chemicals, In the
lower bound estimates the Pulp and
Paper industry was predicted to have
the greatest number of significantly
affected facilities (35), of which 30 are
large facilities. The synthetic rubber
industry had the highest number of
significantly affected small facilities (6),
out of a total of 14 significantly affected
small facilities. None of the industries
examined were expected to suffer
facility closures as a result of the TC.
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In the upper bound estimates,
significantly affected facilities were
expected in seven industries: Puio and
Paper. Synthetic Rubber, Synthetic
Fibers, Organic Chemicals, Textiles,
Pharmaceuticals, and Plastics and
Resins. Pulp and paper had the largest
number of significantly affected
facilities—36 out of 80 for all facilities.
2. Effects on Product and Capital
Markets
The industries with significantly
affected facilities have very little
potential to pass compliance costs on to
consumers in the form of higher prices.
These industries produce primarily
intermediate goods (e.g., rubber, paper,
fibers, and chemicals) which are used in
a number of subsequent processes (e.g.,
manufacturing and fabrication) before
they reach consumer markets. The users
of these intermediate products have
access to similar or identical products
from U.S. suppliers that are not
significantly affected by the TC and
from foreign suppliers; because
substitutes are available, these users
would not be forced to pay higher prices
for the intermediate products.
While results suggest that prices in
product markets will not be affected, at
least some impact is likely on capital
markets. Because affected facilities will
not be able to pass compliance costs
through to buyers in the form of higher
prices, they will experience lower
profits. Lower profits will reduce the
value of capital tied up in these
facilities. However, as most of the
affected facilities are part of integrated
production systems and are owned by
large firms with significant asset
holdings, the effect on capital markets
(i.e.. stock prices and bond ratings)
should be relatively small.
3. Sensitivity Analysis of Economic
Impacts.
A change in one of the analytical
assumptions had significant effects on
economic impacts due to the TC final
rule. Refer to section VI.B.3.a for
discussion of the sensitivity analyses
which were conducted.
Splitting wastestream quantity evenly
between small and large facility size
categories, rather than based on value of
shipments, shifted wastes from large to
small facilities. Under the scenario
where oily wastes fail the TC and no
surface impoundment closure costs are
incurred, this resulted in nearly 40
additional small facilities with
significant economic impacts and 10
small facility closures.
d. Benefits Results. EPA estimated the
benefits of regulating TC wastes on a
wastestream by wastestream basis;
results of this analysis are presented in
Table VI-3. As discussed in the benefits
methodology section, results foi
different benefit measures (human
health risk, resource damage, and
cleanup costs avoided] are likely to
overlap and should not be added.
TABLE VI-3.—BENEFITS OF THE TC RULE
Reduction In MEI Risk:
• Reduction in Carcinogenic 370 to 780.
Risk (number of facilities with
risk greater ttian 1x10E-5 at
down-gradient well).
• Reduction in Non-Carcinogenic 8.
Risk (number of facilities with
exposure above a health-based
threshold at downgradient well).
Reduction in Population Risk:
• Reduction in Carcinogenic 6.
Risk (number of cancer cases
over 70 years).
• Reduction in Non-Carcinogenic 320.
Risk (number of persons with
exposure above a health-based
threshold at downgradient
wells).
Reduction in Resource Damage 3.800.
(present value, millions of 1983
dollars).
Cleanup Costs Avoided (present Up to 15,000.
value, millions of 1988 dollars).
1. MEI Risk
As can be seen from the table, there is
a potentially significant reduction under
the final rule in the carcinogenic risk to
the most exposed individual (MEI).
There are from 370-780 fewer facilities
managing wastes that present risks to
the most exposed individual (MEI)
greater than IXIOE"5 under the final
rule than there were under baseline
conditions. The industrial sectors
driving these benefits include Wholesale
Petroleum Marketing (SIC 517) and
Miscellaneous Plastics Products (SIC
3079J. The constituent driving most of
these benefits is benzene. The difference
between the lower and upper bounds
results from certain oily wastes that are
unregulated in the lower bound.
For non-carcinogenic MEI risk, there
are 8 fewer facilities managing
wastewaters where the exposure to a
non-carcinogenic constituent exceeds
the reference dose (RfD) under the final
rule than under baseline conditions.
Wastes from Wholesale Petroleum
Marketing drive these benefits results.
Cresols are the risk-driving constituents.
The Wholesale Petroleum Marketing
sector presents significant risks due to
the large number of facilities managing
wastewaters and non-wastewaters. The
number of facilities in this sector
estimated to manage wastewaters and
non-wastewaters are 1,290 and 1,050
facilities, respectively; this compares
with 1,900 and 8,600 facilities,
respectively, managing affected
wastewaters and non-wastewaters
across all industrial sectors.
A screening analysis of MEI risks due
to air emissions from surface
impoundments was conducted to gauge
the potential risk via the air medium.
This analysis indicated that in sectors
other than Wholesale Petroleum
Marketing approximately 20 percent of
modeled facilities had carcinogenic risks
greater than 1X10E"5 and 5 percent had
non-carcinogenic doses greater than the
RfD; MEI air risks from Wholesale
Petroleum Marketing were less than
1X10E"6. Benzene contribi ted most of
the carcinogenic risks while phenol was
responsible for most of the non-
carcinogenic risks.
The industries generating wastes with
high MEI air risks differ to some extent
from those generating wastes with high
MEI ground water risks. The industries
generating wastes with high MEI air
risks include Pulp and Paper, Plastics
Materials and Resins, Synthetic Rubber*
Cellulosic and Non-Cellulosic Synthetic
Fibers (SICs 2823 and 2824), and Organic
Chemicals.
There is some potential overlap in
estimates of air and ground water risk.
The wastewater MEI risks via ground
water were based on the assumption
that all the constituent mass was
available for leaching to ground water,
in contrast, the air risks assumed some
percentage of constituent mass would
volatilize from impoundments. As a
result, the wastewater MEI risks via
ground water are likely to be overstated.
2. Population Risk
Based on a very limited analysis of
population risk, EPA estimates that
there would be six fewer cancer cases
over the 70-year modeling period due to
the final rule. Wholesale Petroleum
Marketing (constituent: benzene] and
Plastics and Resins (SIC 2821)
(constituent: vinyl chloride) drive these
benefits. The reduction in number of
persons exposed to non-carcinogens at
concentrations greater than the RfDs
was estimated to be 320 over a 70-year
period. Sawmills and Planing Mills (SIC
2421) and Organic Chemicals
(pentachlorophenol and methyl ethyl
keytone) drive these results.
3. Resource Damage
The total reduction in resource
damage would be approximately $3.8
billion (present value). Wholesale
Petroleum Marketing and Miscellaneous
Plastics Products are the industrial
sectors driving resource damage
benefits. Benzene is the driving
constituent.
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11858 Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations
4. Cleanup Costs Avoided
Estimated cleanup costs avoided due
to the final rule ranged up to $15 billion
(present value). Under the assumption
that all sites with significant resource
damage (i.e., resource damage greater
than $1,000,000 (present value)) would
require cleanup, approximately 1,600
facilities would require cleanup.
5. Sensitivity Analysis of Benefits
Changes in certain analytical
assumptions had significant effects on
the benefits of the TC final rule. (Refer
to sections VI.B.3. a and d for discussion
of the sensitivity analyses which were
conducted.) Some of the changes also
affected cost results, as discussed under
cost results.
Assuming that oily wastes would not
Filter in the TCLP, rather than assuming
that they would, would reduce the
benefits associated with non-
wastewaters, as can be seen in the
lower bound estimates indicated in the
results above. This would result
primarily from the significant reduction
in the number of facilities managing
non-wastewaters in Wholesale
Petroleum Marketing.
Assuming that all wastewaters were
managed in surface impoundments,
rather than some portion being managed
by practices exempt under subtitle C,
would increase the number of facilities
affected in many sectors and increase
benefits significantly. Benefits for
wastewaters could increase by
approximately 10 times since there
would be 10 times as many facilities
with surface impoundments.
Assuming that only 10 percent of the
facilities would be affected for a waste
failing the TC, rather than using the
percent of the waste failing, significantly
reduced the number of facilities affected
by the TC in all industrial sectors. This
would significantly reduce benefits as a
result, since fewer facilities would be
managing wastes.
Assuming that all facilities have
down-gradient wells, rather than
assuming only 46% have down-gradient
wells, would increase benefit results by
a factor of approximately two.
e. Cost-Effectiveness. The Agency
estimated the cost-effectiveness of the
final rule and of several regulatory
alternatives. This discussion is
presented in the regulatory impact
analysis document, which is part of the
public docket for the rule.
/. Used Oil Results, Used oil is
generated across a wide variety of ,
industrial sectors. Some generators
manage or dispose of their used oil
directly while others provide their used
oil to the used oil management system
(UOMS), a system of intermediate
collectors and processors (Ref. 33).
Firms in the UOMS then re-refine or
process the used oil and/or sell it for
various end uses.
Under the worst-case assumption that
used oil would not create TCLP filtration
problems, EPA found based on
constituent concentration data (see Ref.
8), that virtually all used oil would fail
the TC. EPA determined that three end-
use management practices for used oil ,
would be affected; landfilling/
incineration, dumping, and road oiling.
Once used oil became TC hazardous,
it would have to be shifted to other end-
use management practices. Much of the
used oil that is currently dumped or
applied directly to roads by generators
would probably be collected and sold to
the UOMS. Firms in the UOMS that
currently sell used oil for road oiling
would generally shift this oil to other
management practices, such as re-
refining or burning as a fuel. Used oil
that is managed by landfilling or
incineration in subtitle D units would
likely be shifted to management in
subtitle C units.
The shift in management practices
would impose costs on used oil
generators, the UOMS, and end-users of
used oil. Used oil generators currently
providing used oil to the UOMS would
be likely to pay somewhat higher
collection costs due to pass-through of
compliance costs by firms in the UOMS,
Generators that currently manage their
wastes by road oiling would incur
storage and collection costs for their
used oil as well as costs for a road-oiling
substitute. Generators directly managing
their wastes by dumping would incur
costs for storage and collection. Firms in
the UOMS that sell used oil for road
oiling would be forced to sell the oil in
less profitable markets, and some firms
could close if unable to enter another
market. Firms in the UOMS could also
incur costs for disposal of low quality
used oil and related wastes in subtitle C
(rather than subtitle D) units if these
wastes were TC hazardous; as
discussed above, some of these costs
could be passed on to used oil
generators. Firms that re-refine used oil
•could benefit from the TC rule, since a
greater volume of used oil would
potentially be available at a lower price.
Finally, end-users that purchase used oil
for road oiling would incur costs for an
alternative dust suppressant.
The shift in management practices
could also result in certain benefits. A
previous study of carcinogenic risks
from used oil management practices
(Ref. 34] indicates that dumping of used
oil may present significant risks relative
to other management practices (with the
possible exception of burning in boilers,
where risks are more comparable). Road
oiling appears to present more
significant risks than recycling and
comparable or fewer risks relative to
burning in boilers or landfill disposal. It
is difficult to draw definitive
conclusions concerning benefits due to
the different constituent profiles and
population densities associated with
each of the management practices in the
risk analysis.
C. Regulatory Flexibility Analysis
1. Approach
The Regulatory Flexibility Act (5
U.S.C. 801 et seq.) requires that
whenever an agency publishes a notice
of rulemaking, it must prepare a
Regulatory Flexibility Analysis (RFA)
that describes the effect of the rule on
small entities (i.e., small businesses,
small organizations, and small
governmental jurisdictions). An RFA is
unnecessary, however, if the Agency's
administrator certifies that the rule will
not have a significant economic effect
on a substantial number of small
entities.
EPA examined the final rule's
potential effects on small entities as
required by the Regulatory Flexibility
Act. Three measures, based on EPA ,
guidelines for conducting an RFA, were
used to determine whether the rule
would have a "significant economic
effect" on small entities: the ratio of
compliance cost to cost of production,
the ratio of compliance cost to value of
sales, and the ratio of cash from
operations to compliance cost (the last
ratio being used to assess potential
closures). Two of the three criteria, the
ratio of compliance cost to cost of
production and the ratio of cash from
operations to compliance cost, are
discussed in section VI.B.3.C. The third,
the ratio of compliance cost to value of
sales, was estimated for small and large
facilities; if the difference between these
ratios was greater than ten percent, this
indicated a significant impact.
The guidelines for conducting RFAs
are somewhat ambiguous with respect
to evaluating impacts based on the third
criterion. Determining whether the
difference between ratios exceeds ten
percent can be done by subtracting the
large facility ratio from the small facility
ratio or by dividing the small facility
ratio by the large facility ratio. Dividing
the small facility ratio by the large
facility ratio may incorrectly indicate
siqnificant impacts on small facilities
when both ratios are very small but the.
small facility ratio is larger than the
large facility ratio. (For example, a small
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facility ratio of 0.00002 divided by a_
large facility ratio of 0.00001 would
indicate a significant impact on small
businesses based on the division
approach, despite the fact that the very
low ratio of compliance cost to value of
sales for small facilities indicates little
impact on small facilities.) Therefore,
the division approach must be
interpreted with caution.
A "substantial number" of small -
entities was assumed to be 20 percent or
more of the population of small
businesses, small organizations, or small
government jurisdictions within the
universe of facilities affected by the
rule.
The Agency defined a small business
as a business employing 50 employees
or less. (Standard Small Business
Administration criterion is 500
employees.) EPA decided to use the 50
employee definition of a small business
because the RIA estimates facility-level
impacts, and the SBA definition applies
to entire firms. The SBA definition
would designate most of the facilities in
the examined industries as small
businesses, which would obscure
differential impacts on smaller facilities.
Impacts on small businesses related to
costs of compliance for used oil and
contaminated soils were not examined
due to lack of data on the facilities^
experiencing those costs.
2. Results
The only entities found to be affected
by the final rule were small businesses,
defined here as businesses employing
fewer than 50 persons. No small
organizations or small government
jurisdictions were identified as potential
TC waste generators in the TC industry
studies which form the foundation for
this analysis.
The Agency did not identify any
industries in which 20 percent or more
of the small businesses were
significantly affected based on the ratio
of compliance cost to cost of production,
the ratio of cash from operations to
compliance cost, or the ratio of
compliance cost to value of sales (using
the subtraction approach). Using the
division approach for the ratio of
compliance cost to value of gales
indicated that small businesses in four
sectors (including Pulp and Paper,
Synthetic Rubber, Organic Chemicals,
and Wholesale Petroleum Marketing)
would be significantly affected.
However, since the small facility and
large facility ratios were both quite
small (small facility ratios were less
than 0.03), the Agency does not expect
significant small business impacts in
these sectors. Based on these results,
EPA has concluded that today's final
rule will not have a significant effect on
a substantial number of small entities.
As a result of this finding, EPA has not
prepared a formal RFA in support of the
rule. More detailed information on small
business impacts is available in the RIA
for this rule.
D. Response to Comments on RIA for
June 13,1986 Proposal
EPA received many comments on the
RIA for the proposed TC rule. This
section presents a general summary and
analysis of the public comments
concerning the original RIA; all of the
comments are addressed in the
background document for this final rule.
Major issues addressed by eommenters
included consideration of particular
industries, specific aspects of cost and
benefit methodologies, cost and benefit
estimates, and the assessment of small
business impacts.
1. Industries Included in the Analysis
The majority of comments on the RIA
for the proposed rule concerned the
absence of specific industrial sectors
from the group examined for potential
impacts. Other eommenters criticized
the RIA for not considering the effects of
the TC on end users of products and on
facilities such as Publicly Owned
Treatment Works and Municipal
Landfills.
Industries that eommenters suggested
should have been evaluated included
natural gas production, manufacturing of
a variety of products, including forest
products, Pharmaceuticals, automobiles,
plastics, metals, polyvinyl chloride,
semi-conductors, wire and cables, and
waste management. The Agency agrees
with eommenters that a number of
industrial sectors were not addressed in
the RIA for the proposed rule. The
Agency notes, however, that several of
the wastestreams that eommenters
believed should have been included in
the RIA (based upon the proposed
regulatory levels) are not expected to be
defined as hazardous based upon the
final regulatory levels being
promulgated today. One of the
fundamental problems with determining
which industries would potentially be
affected by the TC is lack of data on
currently non-hazardous wastes. Since
these wastes are currently outside the
subtitle C system, requirements for
information gathering related to them
are minimal.
The Agency made extensive efforts, in
preparing the RIA for the TC final rule,
to obtain data on the industrial sectors
potentially affected by the TC. These
data were derived from a variety of
sources. The Agency contacted
numerous trade associations and
individual facilities and collected
pertinent EPA and other government
publications. In addition, EPA prepared
a series of TC industry study reports on
those sectors most likely to generate
significant quantities of TC wastes.
In preparing its TC industry studies,
EPA first conducted preliminary studies
which examined a large number of
industries, with emphasis on identifying
whether or not TC constituents -would
be likely to be present in industry
wastes. Based on the preliminary
studies. EPA completed detailed profiles
of potentially affected industries for use
in the final RIA. The Agency examined
the potential for impacts on a number of
industries that were not considered in
the RIA for the proposed rule, as well as
reconsidering some that were addressed
in that RIA. Table VI-1 in section VLB
compares the coverage of industries for
both the proposed rule RIA and the final
rule RIA and indicates the industries for
which detailed quantitative analysis
was conducted.
Commenters also criticized the
proposed rule RIA for not considering
effects on end-users of products
containing TC constituents. Examples of
such end-user industries include
agricultural chemical users, transporters,
automotive maintenance facilities,
petroleum retailers, medical facilities,
and research laboratories. The Agency
recognizes that TC toxicants exist in a
variety of substances, and that end-
users as well as producers of products
containing TC constituents could be
affected by the rule. Some end-users not
identified in the RIA may be affected,
but there is no information to quantify
these potential impacts. The Agency
believes that some of the impacts on
affected end users may be mitigated by
small quantity generator regulations
under 40 CFR 261.5,
Finally, several eommenters
questioned EPA's assessment of impacts
on Publicly Owned Treatment Works
(POTWs), resource recovery facilities,
public water suppliers, municipal
landfills, the electrical services industry,
and currently regulated RCRA facilities.
As discussed previously in section
III.K.2, the Agency has tested a number
of POTW sludges to determine whether
or not these sludges would be
considered hazardous under the TC; the
data generally indicate that these
wastes would not be affected by the TC
(Ref. 8). Because the final regulatory
level for chloroform is significantly
higher than originally proposed, EPA
believes that public water suppliers also
are unlikely to generate TC wastes. The
Agency analyzed wastestreams
generated by the Electrical Services
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industry. These wastes were excluded
from the R1A because they are fossil fuel
combustion wastes, which are exempt
from subtitle C regulation until a
determination is made as to whether
they should be regulated as hazardous.
The Agency acknowledges that some
waste generated by waste management
facilities may exhibit the TC; however,
most of these wastestraams that
ccmmenters believed should be included
are not expected to exhibit the TC under
the final regulatory levels. Finally,
impacts on currently regulated RCRA
'facilities (in the industries included in
the RIA) were addressed in the RIA.
2. Estimation of Costs and Economic
Impacts
Many comir.enlers expressed concern
that the compliance cost estimates for
facilities included in the economic
impact analysis did not captars many of
the expenditures faced by handlers of
hazardous waste. The most common
criticism was directed at the omission of
the cost for actually performing the
TCLP. Other commenters mentioned
insurance costs and costs associated
with RCRA permit applications. Another
large group of comments concerned the
costs for permitting and retrofitting the
large universe of surface impoundments
containing wastewaters which would
exhibit the TC. In addition, a number of
commenters contended that the RLA
significantly underestimated potential
economic impacts of the TC.
Other commenters claimed that the
expense of the highly sophisticated
equipment and specially trained
personnel necessary for the testing of
wastes would pose a significant burden
on many firms, especially those without
on-site laboratory facilities. The Agency
recognizes that testing of wastes could
pose a significant expense for fines that
choose to test their wastes. On the other
hand, there is currently no RCRA
requirement for generators to test their
wastes; the determination of
hazardousness may be made based on
either laboratory analysis of the waste
or on knowledge of the waste, raw
materials, and production processes.
The Agency expects that many
generators will rely on the latter
method, and elect not to perform the
TCLP. The Agency is still considering
promulgating a testing requirement at a
future date. If a testing requirement is
proposed, potential costs of testing will
be analyzed in detail.
Recognizing that administrative and
insurance costs can constitute a
significant portion of waste management
costs* the Agency considered these in
cost estimates in the final RIA. In
addition, the "ost of preparing RCRA
permit applications is considered in the
cost of subtitle C waste management, as
are items such as liability insurance,
personnel training, and contingency
planning.
In response to comments that surface
impoundment impacts were understated,
the Agency examined the effect of the
TC rule on wastewaters and estimated
the costs of compliance with subtitle C
requirements. The Agency assumed in
the final RIA that, based on least-cost
management practices, surface
impoundments would not have to be
retrofitted. Instead, it was assumed that
affected wastewaters would be
segregated and treated in a separata
tank systam, while remaining non-
hazardous wastswaters could continue
to be managed in the impoundments. In
deriving an upper bound estimate of
costs, it was assumed that some
impoundments would have to undergo
subtitle C clean closure.
Given the broad scope of the TC rule
and the general lack of data on
industries and facilities managing
currently non-hazardous wastes, the
Agency agrees that economic impacts
on certain sectors may have been
underestimated in the RIA for the
proposed rule. As discussed above, the
Agency has made significant efforts in
the final RIA to more accurately
characterize the sectors potentially
affected by the TC and to estimate the
actual impacts on affected facilities.
3. Estimation of Benefits
Several commenters remarked en the
original methodology used for the
estimation of benefits. The most
frequent target of criticism was the
assumption that all contaminated
aquifers would be cleaned up as a result
of the TC. Commenters also questioned
the validity of assuming that ground
water resource conditions in North
Carolina were representative of
conditions across the entire United
States.
Commenters on the use of aquifer
cleanup as the basis for estimating
benefits of the proposed rule asked for
justification of the assumption that all
aquifers would be cleaned up and an
explanation of the benefits to human
health and the environment which
would result from the cleanup. The
Agency used a different methodology to
estimate benefits for the final RIA than
was used for the original RIA. For the
final RIA, EPA examined three potential
types of benefits: human health risk
reduction, resource damage avoided,
and cleanup costs avoided. The
assumption that all aquifers would be
cleaned up was not used in the final
RIA. In estimating benefits based on
cleanup costs avoided through
controlled subtitle C management of TC
wastes, EPA assumed in the RIA for the
final rule that, for the near term, the
subtitle D facilities with down-gradient
wells and with at least some resource
damage (as predicted by the resource
damage analysis) would be the most
likely candidates for cleanup.
The Agency agrees with the comments
that ground water resource conditions in
North Carolina may not be
representative of conditions across the
entire United States. As a result, in the
final RIA EPA used distributions of
hydrogeologic parameters which were
representative of nationwide conditions,
rather than relying on hydrogeologic
information from one state.
4. Cost-Benafit Comparisons
In general, commenters argued that
the RIA overestimated likely benefits of
the proposed rule while underestimating
the potential impacts. Commenters
believed that the TC would bring large
quantities of waste into the subtitle C
system with little or no attendant
environmental or health benefit. One
commenter claimed that after all
indirect impacts are considered, the net
benefits of the rule could be negative.
Another commenter, however, stated
that benefits were actually
underestimated because of assumptions
in the baseline scenario.
The Agency has used an improved
methodology and additional data in the
final RIA. EPA believes that the final
RIA provides reasonable estimates of
the potential costs and benefits of the
rule. As presented in this section, the
final RIA does indicate that the TC will
bring relatively large quantities of waste
into the subtitle C system, and also
indicates that there will be attendant
benefits. The Agency used cost and
benefit estimates to compare relative
costs and benefits of the various
regulatory options. The analyses were
conducted separately using approaches
constructed to make the best possible
use of available data. The separate
analyses were not meant to be used to
produce absolute measures of cost
effectiveness. The RIA contains
discussion of the Agency's evaluation
and comparison of cost and benefit
results.
5. Small Business Analysis
The Agency received many comments
on its assessment of the effects of the
proposed TC on small businesses. One
group of comments focused on the
definition chosen by EPA for small
businesses. The Agency was also
criticized for its threshold for
. '-<*..
A. ••*••• x:
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11881
determining if a "substantial number" of
small businesses would suffer
significant economic impacts, and
therefore necessitate the preparation of
a full Regulatory Flexibility Analysis.
Finally, many commenters felt that the
analysis severely underestimated the
Impact of the rule on small businesses.
Commenters asked why the Agency
did not use the standard Small Business
Administration (SBA) criterion of 500
employees to define a small business.
The Agency decided to use the 50
employee definition of a small business
because the RIA estimates facility-level
impacts, and the SBA definition applies
to entire firms. In the absence of data to
estimate firm-level impacts, the Agency
chose the 50 employee cutoff as an
appropriate small facility definition for
the RIA. The SBA definition would
designate most of the establishments in
most of the examined industries as
small facilities, which would obscure
differential impacts on smaller facilities.
The Agency was criticized for using a
20 percent threshold for determining if a
"substantial number" of small
businesses would be significantly
affected. Commenters claimed that it
was arbitrary to consider the small
business impact negligible if "only 19.9
percent" of small business were
significantly affected. The Agency
recognizes that, for an individual
facility, the magnitude of impacts is not
altered by the number of other facilities
which are significantly affected.
Nevertheless, the Agency believes that
20 percent is a reasonable benchmark
for defining a "substantial number" of
small businesses. The 20 percent
threshold is commonly applied in RIAs
conducted by EPA.
A large number of commenters
criticized the overall conclusions of the
small business analysis, declaring that
the analysis severely underestimated
the economic effects of the TC on small
businesses. Commenters maintained
that the universe of small businesses
was inadequately addressed. Examples
of small businesses not included in the
analysis which commenters felt should
have been considered included service
stations and vehicle maintenance
facilities. Commenters also mentioned
the expense of performing the TCLP,
claiming that it was an especially
significant hardship for small
businesses.
As explained in the general discussion
of the industrial sectors included in the
RIA, the Agency made extensive efforts
to identify and include sectors
potentially affected by the TC rule,
including end users of products. And, as
discussed under the comments on
incorporating testing costs, these costs
were not included since generators are
not currently required to test their
wastes. Although EPA maintains that a
full RFA is not necessary for the TC
rule, it realizes that the impact of the
rule could be significant for individual
small enterprises.
E. Paperwork Reduction Act
The information collection
requirements in this rule have been
approved by the Office of Management
and Budget (OMB) under the Paper
Reduction Act. 44 U.S.C. 3501 et seq.,
and have been assigned the following
OMB control numbers: 2050-0007, Land
Disposal Permitting Standards; 2050-
0008, RCRA Closure/Post-Closure; 2050-
0009, Hazardous Waste Storage and
Treatment Facilities; 2050-0011,
Contingency Plans for Hazardous Waste
Facilities; 2050-0012, General Facility
Operating Requirements; 2050-0013,
Operating Record for Hazardous Waste
Facilities; 2050-0028, Notification of a
Hazardous Waste Activity; 2050-0033,
Reporting, Recordkeeping, and Planning
for Ground-Water Monitoring; 2050-
'0034, RCRA Hazardous Waste Permit
Application Part A; 2050-0036, RCRA
Financial Assurance Requirements;
2050-0037, Recordkeeping and Reporting
for RCRA Permitees; and 2050-0039,
Uniform Hazardous Waste Manifest for
Generators and Transporters.
VII. References
1. U.S. EPA, "Response to Public Comments
Background Document for the Subsurface
Fate and Transport Model Used in the
Toxicity Characteristic Rule", 1980,
2. U.S. EPA, "Response to Comments
Background Document for the Toxicity
Characteristic", 1989.
3. U.S. EPA. 'Technical and Response to
Comments Background Document for
Chronic Toxicity Reference Levels",
1990.
4. U.S. EPA, 'Technical and Response to
Comments Background Document for the
TCLP (Method 1311)", 1989.
5, U.S. EPA, "State Subtitle D Regulations on
Solid Waste Landfills", Final Volume I,
1988.
8. U.S. EPA, "National Survey of Solid Waste
(Municipal) Landfill Facilities", Final
Report, EPA/530-SW-88-034.198a
7, U.S. EPA, "Summary of Data on Industrial
Non-hazardous Waste Disposal
Practices", Final Report, December 1985.
8. U.S. EPA. 'Toxicity Characteristic
Regulatory Impact Analysii", 1989.
9. U.S. EPA. "Background Document for
EPA's Compoiite Landfill Model
(EPACML)", 1990.
10. Simkins. S. and M. Alexander, "Models
for Mineralization Kinetics with the
Variables of Substrate Concentration
and Population Density", "Applied and
Environmental Microbiology", 1984, Vol.
47, No. 6, pp. 1299-1308.
11. Lewis, D. L and D. K. Gattie. "Prediction
of Substrate Removal Rates of Attached
Microorganisms and of relative
Contributions of Attached and
Suspended Communities at Field Sites",
"Applied and Environmental
Microbiology", 1988, Vol. 54, No. 2. pp.
434-440.
12. Robinson, J, A. and W. G. Characklis.
"Simultaneous Estimation of Vmax, Km,
and the Rate of Endogenous Substrate
Production (R) from Substrate Depletion
Data", "Microbial Ecology, 1984, Vol. 10,
pp. 185-178.
13. Karickhoff. S. W. "Chapter 11: Sorption
Kinetics of Hydrophobic Pollutants in
Natural Sediments", "Contaminants and
Sediments, Vol. 2: Fate and Transport,
Case Studies, Modeling, Toxicity, Ann
Arbor Science Publishers, Inc. Ann
Arbor, Michigan, 1980. pp. 193-205.
14. Kohring, G., J. E. Rogers and J, Wiegel.
"Anaerobic Biodegradation of 2,4-
Dichlorophenol in Freshwater Lake
Sediments at Different Temperatures",
"Applied and Environmental
Microbiology", 1989, Vol. 55, No. 2, pp.
34a-353.
15. Hwang, H., R. E. Hodson, and D. L Lewis.
"Assessing Interactions of Organic
Compounds During Biodegradation of
Complex Waste Mixtures by Naturally
Occurring Bacterial Assemblages",
"Environmental Toxicology and
Chemistry", 1989, Vol. 8, pp. 209-214.
16. U.S. EPA, "Screening Survey of Industrial
Subtitle D Establishments", Draft Final
Report. December 1987.
17. U.S. EPA, "Analysis of U.S. Municipal
Waste Combustion Operating Practices",
May 1989.
18. U.S. EPA, "Cooperative Testing of
Municipal Sewage Sludges by the
Toxicity Characteristic Leaching
Procedure and Compositional Analysis",
Draft Final. 1988.
19. U.S. EPA, "Estimates of Waste Generation
by Cellulosic Manmade Fibers, Synthetic
Organic Fibers, Petroleum Refining.
Rubber and Miscellaneous Plastic
Products, Leather Tanning and Finishing,
Oil and Gas Transportation Industries.
and the Laundry, Cleaning and Garment
Services", May 27,1987.
20. U.S. EPA, "Estimates of Waste Generation
by the Lumber and Wood Products
Industry", December 9,1987. -
21. U.S. EPA, "Estimates of Waste Generation
by the Organic Chemical Industry",
December 1987.
22. U.S. EPA, "Estimates of Waste Generation
by Petroleum Crude Oil and Petroleum
Products Distribution and Wholesale
Systems", November 13,1987.
23. U.S. EPA, "Estimates of Waste Generation
by Plastic Materials and Resins",
November 1987.
24. U.S. EPA, "Estimates of Waste Generation
by the Petroleum Refining Industry",
November 13,1987.
25. U.S. EPA, "Estimates of Waste Generation
by the Pharmaceutical Industry",
November 18,1987.
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11862 Federal Register / Vol. 55, No. 61 / Thursday, March 29. 1990 / Rules and Regulations
26. US, EPA, "Estimates of Waste Generation
by the Pulp and Paper Industry", August
12.1987.
27, U.S. EPA, "Estimates of Waste Generation
by the Synthetic Fibers Industry",
November 18,1987.
23. U,S. EPA, "Estimates of Waste Generation
by Textile Mills", December 15,1987.
29. U.S. EPA, "Synthetic Rubber industry",
November 1987.
30. U.S. EPA. "Wastewater Treatment
Profiles for Industrial Sectors Impacted
by Proposed Toxicity Characteristic",
August 19,1983.
31. U.S. EPA, "Wastewater Treatment
Profiles for Industrial Sectors Impacted
by Proposed Toxicity Characteristic",
August 24,1988.
32. U.S. EPA, "Liner Location Risk and Cost
Analysts Model, Phase II", Draft Report,
1988,
33. U.S. EPA, "Composition and Management
of Used Oil Generated in the United
States", September 1984.
34. U.S. EPA, "Risk Assessment of Proposed
Waste Oil Standards for the
Management of Used Oil", August 1985.
List of Subjects in 40 CFR Parts 261,264,
2S5,268,271, and 302
Administrative practice and
procedure. Air pollution control.
Chemicals, Confidential business
information. Hazardous materials
transportation, Hazardous substances,
Hazardous waste, Indian lands.
Intergovernmental relations. Natural
resources, Nuclear materials. Penalties,
Pesticides and pests, Radioactive
materials, Recycling, Reporting and
recordkeeping requirements, Superfund.
Water pollution control, Water supply,
Waste treatment and disposal.
Dated; March 5,1990.
William K. Reilly,
Administrator.
For the reasons set out in the
preamble, Chapter I of Title 40 of the
Code of Federal Regulations is amended
as follows:
PART 261—IDENTIFICATION AND
LISTING OF HAZARDOUS WASTE
1. The authority citation for part 261
continues to read as follows:
Authority: 42 U.S.C. 8905,6912(a), 8921, and
8922.
2, Section 261.4 is amended by
revising paragraphs (b)(6)(i)
introductory text, and (b)(9) and by
adding paragraph (b)(10) to read as
follows:
§ 261.4 Exclusions.
* * * * *
(b) * • •
(6}(i) Wastes which fail the test for the
Toxicity Characteristic because
chromium is present or are listed in
subpart D due to the presence of
chromium, which do not fail the test for
the Toxicity Characteristic for any other
constituent or are not listed due to the
presence of any other constituent and
which do not fail the test for any other
characteristic, if it is shown by a waste
generator or by waste generators that:
*****
(9) Solid waste which consists of
discarded wood or wood products
which fails the test for the Toxicity
Characteristic solely for arsenic and
which is not a hazardous waste for any
other reason or reasons, if the waste is
generated by persons who utilize the
arsenical-treated wood and wood
products for these materials' intended
end use.
(10) Petroleum-contaminated media
and debris that fail the test for the
Toxicity Characteristic of § 261.24 and
are subject to the corrective action
regulations under part 280 of this
chapter.
3, Section 261.8 is added to subpart A
to read as follows:
§ 2S1.8 PC3 Wastes Regulated Under
Toxic Substance Control Act
The disposal of PCB-contalning
dielectric fluid and electric equipment
containing such fluid authorized for use
and regulated under part 761 of this
chapter and that are hazardous only
because they fail the test for the
Toxicity Characteristic (Hazardous
Waste Codes D01B through D043 only)
are exempt from regulation under parts
261 through 265, and parts 288,270, and
124 of this chapter, and the notification
requirements of section 3010 of RCEA.
4. Section 261.24 is revised to read as
follows:
§ 261.24 Toxicity characteristic.
(a) A solid waste exhibits the
characteristic of toxicity if, using the test
methods described in Appendix II or
equivalent methods approved by the
Administrator under the procedures set
forth in §§ 260.20 and 260.21, the extract
from a representative sample of the
waste contains any of the contaminants
listed in Table 1 at the concentration
equal to or greater than the respective
value given in that Table. Where the
waste contains less than O.S percent
filterable solids, the waste itself, after
filtering using the methodology outlined
in Appendix II, is considered to be the
extract for the purpose of this section.
(b) A solid waste that exhibits the
characteristic of toxicity, but is not
listed as a hazardous waste in subpart
D, has the EPA Hazardous Waste
Number specified in Table 1 which
corresponds to the toxic contaminant
causing it to be hazardous.
TABLE 1.—MAXIMUM CONCENTRATION OF
CONTAMINANTS FOR THE Toxsenr
CHARACTERISTIC
EPA
HW
No.1
D004
DC05
D018
0006
0019
D020
0021
0022
0007
D023
0024
D025
D026
0016
0027
C028
D029
0030
0012
0031
0032
0033
0034
0008
0013
0009
DQ14
0035
0036
0037
D038
D010
0011
D039
0015
0040
0041
0042
D017
D043
Contaminant
Arsenic .
Barium ~*
B@nzene..«..u.«.....
Cadmium
Carbon
tetrachlotide.
Chlordafid
Chlorcbenisno. —
Chloroform..,.
Chromium _. .
c-Cresol
m-Cresol _.
p-Cresal... . „..
Cresol
2.4-0
1,4-
Oichloroben-
zene.
1,2-
Dichtoroath-
ane.
i,1-
Dichloroethy-
tane.
2.4-
DMrotoluena,
Efidrin ~~ .,
Heptaehtor (and
rts hydroxide).
HexscfUoroben-
zene.
Hexachlorobuta-
diena.
Hexachioroeth-
ana.
Lead .
Undane _ ,
Mercury
MethoxycMw
Methyl ethyl
Netorm
Nitrobenzene
PentrachJoro-
phenoL
Pyridine ...
Selenium ., ..
Silver
Tetractilofoetrryl-
ene.
Toxaphene
Trichtoroethyl-
ene.
2.4,5-
Trichloro- —
phenol
2,4.6-
Trichloro-
phanol.
2,4.5-TP CShex)..,
Vinyl chloride
CAS No.'
7440-38-2
7440-39-3
71-43-2
7440-43-9
56-23-5
57-74-9
103-90-7
67-65-3
7440-47-3
95-48-7
108-39-4
106-44-5
94-75-7
1QS-46-7
107-06-2
75-35-4
121-14-2
72-20-8
78-44-8
118-74-1
87-58-3
67-72-1
7439-92-1
58-S9-9
7439-97-6
72-43-5
78-93-3
98-95-3
87-86-5
110-86-1
7782-<9-2
7440-22-4
127-18-4
8001-35-2
79-01 -6
95-95-4
88-06-2
93-72-1
75-01-4
Regula-
tory
Level
(mg/L)
5.0
100.0
0.5
1.0
0.5
003
1000
6-0
50.
• 200.0
• 200.0
•zooo
•200.0
10.0
7.5
0.5
0.7
'0.13
0.02
O.C08
»013
0.5
3.0
50
0.4
0.2
10.0
200.0
2.0
100,0
'5.0
1.0
5.0
0,7
0.5
0.5
400.0
2.0
1.0
0.2
1 Hazardous waste number.
* Chemical abstracts service number.
•Quantitauon limit is greater man the calculated
regulatory level. The guanwaoon limit tneretore be-
comes trie regulatory level
4 If o-, nv. and p-CrescH concentrations cannot be
differentiated, the total crasot {0026) concentration
is used. The regulatory level of total cresot is 200
mg/l.
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OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55, No, 81 / Thursday, March 29, 1990 / Rules and Regulations 11883
5. Section 261.30 is amended by
revising paragraph (b) to read as
follows:
§261.30 General.
*****
(b) The Administrator will indicate hia
basis for listing the classes or types of
wastes listed in this subpart by
employing one or more of the following
Hazard Codes:
ignitable Waste (!)
Corrosive Waste — (C)
Reactive Waste — (R)
Toxicity Characteristic Waste (E)
Acufe Hazardous Waste (H)
Toxic Waste _ (T)
Appendix VII identifies the constituent
which caused the Administrator to list
the waste as a Toxicity Characteristic
Waste (E) or Toxic Waste (T) in
§§261.31 and 261.32.
*****
6. Appendix II of part 201 is revised to
read as follows:
Appendix II—Method 1311 Toxicity
Characteristic Leaching Procedure
(TCLP)
1.0 Scope and Application
1.1 The TCLP is designed to determine the
mobility of both organic and inorganic
contaminants present in liquid, solid, and
multiphasic wastes.
1.2 if a total analysis of the waste
'demonstrates that individual contaminants
are not present in the waste, or that they are
present but at such low concentrations that
the appropriate regulatory thresholds could
not possibly be exceeded, the TCLP need not
he run.
1.3 If an analysis of any one of the liquid
fractions of the TCLP extract indicates that a
regulated compound is present at such high
ieveis that even after accounting fur dilution
from tha other fractions of tha extract the
concentration would be above the regulatory
threshold for that compound, then the waste
is hazardous and it is not necessary to
analyze the remaining fractions of the
extract.
1.4 if an analysis of extract obtained
using a bottie extractor shows that the
concentration of any regulated volatile
contaminant exceeds the regulatory threshold
for that compound, then the waste is
hazardous and extraction using the ZHE is
not necessary. However, extract from a bottle
extractor cannot be used to demonstrate that
the concentration of volatile compounds is
beiow the regulatory threshold,
2.0 Summary of Method {see Figure 1}
2.1 For liquid wastes (i.e., those
containing less than 0,5 percent dry solid
material), the waste, after nitration through a
0.8 to 0.8-um glass fiber filter, is defined as
the TCLP extract,
2.2 For wastes containing greater than or
equal to 0.5 percent solids, the liquid, if any,
is separated from the solid phase and stored
for later analysis; the solid phase, if
necessary, is reducsd in particle size. The
solid phase is extracted with an amount of
extraction fluid nqual to 20 times the weight
of the solid phase. The extraction fluid
employed is a function of the alkalinity of the
solid phase of the waste. A special extractor
vessel is used when testing for volatile
contaminants (see Table 1 for a list of volatile
compounds). Following extraction, the liquid
extract is separated from the solid phase by
filtration through a 0.6 to 0.8-um glass fit-tr
filter.
BILLING CODE 656O-5O-M
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11884 Federal Register / Vol. 55, No. 61 / Thursday. March 29, 1990 / Rules and Regulations
Figure 1 M.thod 1311 Flowchart
U»a m sub-»*apl* of wa*t«
Solid
Separata extract
iron »olld «/
0 , 6-Q- 8 um 0I««*
fib.r filt.r
lic^uxEJ and analyze
{•atheoalicaUy
eomntrw r««ult »/
r*syit ot MKtract.
.iquid
BILUNO CODE (StO-50-C
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<-*-*.-* OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations 11865
TABLE 1.—VOLATILE CONTAMINANTS '
Compound
Acetone .„..„., . „,„.„.-.„,«...„
Bertzene. ........».,...._. ....,„,,.,... „.-......
n-Butyt alcohol...™-..,-,.... ..,...,m....,™.....
Cartxjn disuftida..™....- „„„... ......
Carbon tetrachlondo ,„,
Cfiiorobenzcne. — «..* «.
Chloroform,—..,,™. .... ... „.._.
1 ,2-Dicfitoroethar*e ...... ......_......
1 , 1 -Dicftlcffoetttyiene ... .. .. .
Ethyl acetate .,™......,™,.,,,..».™.........,..
Ethyi beniene ....*.,..«,.,. „...
Eihyi ether,™..,..............,.... ..... .
isobutafioi .,.-...„.....„.,*.......„...,....,„. .
Methgnc!
Methyl «ttM ketone...... ......... ...................
Tstracnlorcsthytena .,„....„.....„„.,........„..,..
Tcluene,,, .......... , . ....
1,1,1 -Trtchforoethane ............
TrichlQftX'ftylene .
Tfictilorciluccorr ethane. ....... „.„„„.,
1 , 1 ,2-Tricfi'cro- 1 .2,2-triiluoroethane
CASna
67-B4-1
71-43-2
71-36-3
75-15-0
56-23-5
1 03-90-7
67-66-3
107-06-2
75-35-4
141-78-V
100-41-4
60-29-7
78-83-1
S7_gg_l
75-09-2
73-93-3
106-10-1
127-18-4
108-88-3
71-55-5
79-01-6
75-69-4
76-13-1
75-01— S
TABLE 1.—VOLATILE CONTAMINANTS >—
Continued
Compound
CAS no.
Xylene.
1330-20-7
'When testing for any Of all of thesa contami-
nants, the zero-neadspace axtractot vessel shall ba
used instead of the bottle extractor.
2,3 If compatible (i.e., multiple phases will
not form on combination), the initial liquid
phase of the waste is added to the liquid
extract, and these are analyzed together. If
incompatible, the liquids are analyzed
separately and the results are mathematically
combined to yield 3 volume-weighted
average concentration.
3.0 Interferences
3.1 Potential interferences th-'it may be
encountered during analysis are discussed in
the individual analytical methods.
4.0 Apparatus and Materials
4.1 Agitation apparatus: The agitation
apparatus must be capable cf rotating the
extraction vessel in an end-over-end fashion
(see Figure 2) at 30 +2 rpm. Suitable devices
known to EPA are identified in Table 2.
4.2 Extraction Vessel:
4.2.1 Zero-Headspace Extraction Vessel
(ZHEJ. This device is for use only wh«n the
waste is being tested for the mobility of
volatile constituents (i.e., those listed in
Table 1). The ZKE (depicted in Figure 3) .
allows for liquid/solid separation within the
device, and effectively precludes headspace.
This type of vessel allows for initial liquid/
solid separation, extraction, and final extract
filtration without opening the vessel {sue step
4.3.1). The vessels shall have an intarnal
volume of 500-fiOO rnL and be equipped to
accommodate a 90-110 mrn filter. The devices
contain VITON " * O-rings which should be
replaced frequently. Suitable ZHE dsvitas
known to EPA are identified in Table 3.
BILLING CODE 6580-SO-ll
1 VITON " is a trai!«n.-irk of Du Punt.
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11868 Federal Register / Vol. 55, No. 61 / Thursday, March 29, 1990 / Rules and Regulations
Motor
(30 ± 2 fpm)
Extraction Vassal Holder
Rgure 2. Rotary Agitation Apparatus
BILLING CODE swo-so-c
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A-^C OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55. No. 61 / Thursday, March 29. 1990 / Rules and Regulations 11867
TABLE 2.—SUITABLE ROTARY AGITATION APPARATUS >
Company
Analytical Testing and Consulting Services, Inc
Associated Design and Manufacturing Company
Environmental Machine and C3S'gn Inc
IRA Machine Shop and Laboratory
Lars Lande Manufacturing _
Millipore Corp
Location
Warrington, PA (215) 343-4490..
Alexandria, VA (703) 549-5999 ..
Lynchburg VA (804) 845-6424
Santurce PR (809) 752-4004
Whitmore Lake, Ml (313) 449-
4116.
Bedford, MA (800) 225-3384
Model no.
2-ZHE or 4-bottle extractor (DC20S); 4-ZHE or
8-botUe extractor (DC20); 6-ZHE of 12-bottle
extractor (DC20B).
2-vesse) (3740-2). 4-vessel (3740-4). 6-vessel
(3740-6). 8-vessel (3740-8). 12-vessel
(3740-12). 24-vessel (3740-24).
8-vessel (08-00-00) 4-vessel (04-00-00)
8-vessel (011001)
10-vessel (10VRE) 5-vessel (5 VRE).
4-ZHE or 4 1 -liter bottle extractor
(YT300RAHW).
1 Any device that rotates the extraction vessel in an end-over-end fashion at 30 +2 rpm is acceptable.
BILLING CODE 6560-50-M
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11868 Federal Register / Vol. 55, No, 61 / Thursday, March 29, 1990 / Rules and Regulations
Uquid Inlet/Outlet Valve
"
Top Flange
Support Screen-^
Fltte
Support Scree
Vlton o-rings-
Bottom Range—^C
Pressurized Gas-
iniet/Oytiet Valve
Piston
c
c
Gas
Pressure
Gauge
Figure 3, Zero-Headspace Extractor (ZHE)
BIUJNQ CODE 8560-50-C
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OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55. No. 61 / Thursday. March 29. 1990 / Rules and Regulations 11869
TABLI 3.—SUITABLE ZEHO-HEADSPAGE EXTRACTOR VESSELS '
Company
Analytical Tasting & Consulting Services, Inc
Associated Design and Manufacturing Company ..
Lars Lands Manufacturing * ....... ...... ...
Millipore Corporation „
Environmental Machine and Design, Inc . . ....
Location
Warrtngton, PA (215) 343-4490..
Alexandria, VA (703} 549-5999 ..
Whitmora LaKe. Ml (313) 449-
4116.
Bedford MA (800) 325-3384
Lynchburg, VA (804) 845-6424 ..
Model no.
C102, Mechanical Pressure Device.
3745-ZHE, Gas Pressure Device.
ZHE-11, Gas Pressure Device.
YT30090HW, Gas Pressure Device.
VOLA-TQX1, Gas Gas Pressure Device.
' Any device that meets the specifications listed in Section 4.2.1 of trie method is suitable.
1 This device usas a 110 mm filter.
For the ZHE to be acceptable for use, the
piston within the ZHE should be able to be
moved with approximately 15 psi or less. If it
takes more pressure to move the piston, the
O-rings in the device should be replaced. If
this does not solve the problem, the ZHE is
unacceptable for TCLP analyses and the
manufacturer should be contacted.
The ZHE should be checked for leaks after
every extraction. If the device contains a
built-in pressure gauge, pressurize the device
to 50 psi, allow it to stand unattended for 1
hour, and recheck the pressure. If the device
does not have a built-in pressure gauge,
pressurize the device to 50 psi, submerge it in
water, and check for the presence of air
bubbles escaping from any of the fittings. If
pressure is lost check all fittings and inspect
and replace O-rings, if necessary. Retest the
device. If leakage problems cannot be solved,
the manufacturer should be contacted.
Some ZHEs use gas pressure to actuate the
ZHE piston, while others use mechanical
pressure (see Table 3). Whereas the volatiles
procedure (see section 9.0) refers to pounds-
per-square-inch (psi), for the mechanically
actuated piston, the pressure applied is
measured in torque-inch-pounds. Refer to the
manufacturer's instructions as to the proper
conversion.
4^2 Bottle Extraction Vessel. When the
waste is being evaluated using the
nonvolatile extraction, a jar with sufficient
capacity to hold the sample and the
extraction fluid is needed. Headspace is
allowed in this vessel.
The extraction bottles may be constructed
from various materials, depending on the
contaminants to be analyzed and the nature
of the waste (see Step 4,3.3). It is
recommended that borosilicate glass bottles
be used instead of other types of glass,
especially when inorganics are of concern.
Plastic bottles, other than polytetrafluoro-
ethylene, shall not be used if organics are to
be investigated. Bottles are available from a
number of laboratory suppliers. When this
type of extraction vessel is used, the filtration
device discussed in Step 4.3.2 is used for
initial liquid/solid separation and final
extract filtration.
4.3 Filtration Devices: It is recommended
that all filtrations be performed in a hood,
4.3,1 Zero-Headspaee Extractor Vessel
(ZHE): When the waste is evaluated for
volatiles. the zero-headspace extraction
vessel described in section 4.2.1 is used for
filtration. The device shall be capable of
supporting and keeping in place the glass
fiber filter and be able to withstand the
pressure needed to accomplish separation (50
psi).
Note: When it is suspected that the glass
fiber filter has been ruptured, an in-line glass
fiber filter may be used to filter the material
within the ZHE.
4.3.2 Filter Holder: When the waste is
evaluated for other than volatile compounds,
any filter holder capable of supporting a glass
TABLE 4.—SUITABLE FILTEB HOLDERS »
fiber filter and able to withstand the pressure
needed to accomplish separation may be
used. Suitable filter holders range from
simple vacuum units to relatively complex
systems capable of exerting pressures of up
to 50 psi or more. The type of filter holder
used depends on the properties of the
material to be filtered (see Step 4.3.3). These
devices shall have a minimum internal
volume of 300 mi and be equipped to
accommodate a minimum filter size of 47 mm
(filter holders having an internal capacity of
1.5 L or greater and equipped to
accommodate a 142 mm diameter filter are
recommended). Vacuum filtration can only be
used for wastes with low solids content (< 10
percent) and for highly granular liquid-
containing wastes. All other types of wastes
should be filtered using positive pressure
filtration. Suitable filter holders known to
EPA are shown in Table 4.
4.3.3 Materials of Construction:
Extraction vessels and filtration devices shall
be made of inert materials which will not
leach or absorb waste components. Glass.
polytetrafluoroethylene (PTFE), or type 310
stainless steel equipment may be used when
evaluating the mobility of both organic and
inorganic components. Devices made of high-
density polyethylene (HDPE), polypropylene,
or polyvinyl chloride may be used only when
evaluating the mobility of metals. Borosilicate
glass bottles are recommended for use over
other types of glass bottles, especially when
inorganics are constituents of concern.
Company
Nucieopore Corporatiofi — ... ... , ., .«.
Micro Filtration Systems „-. ... . „«.,
Millipore Corporation .... .._.«.» «.- ~.~
Location
Pleasanton CA (800) 882-7711
Dublin CA (800) 334-7132 (415) 828-6010
Bedford, MA (800) 225-3384
Model/Catalogue no.
425910 410400 - -
302400 31 1400
YT30142HW XX10Q47QO
Size (urn)
142 mm
47 mm
142 mm
47 rnm
142mm
47 mm
< Any devica capable of separating me liquid from tho solid phase of ina wast* is suitable, providing that it is chemically compatible with the waste and the
constituents to be analyzed. Plastic devices (not listed above) may be used when only inorganic contaminants are of concern. The 142 mm size filter holder is
recommended.
4.4 Filters: Filters shall be made of
borosilicate glass fiber, shall contain no
binder materials, and shall have an effective
pore size of 0.8 to 0.8-um or equivalent Filters
known to EPA which meet these
specifications are identified in Table 5. Pre-
filters must not be used. When evaluating the
mobility of metals, filters shall be acid-
washed prior to use by rinsing with IN nitric
acid followed by three consecutive rinses
with deionized distilled water (a minimum of
1-L per rinse is recommended). Class fiber
filters are fragile and should be handled with
care.
4.S pH meters: The meter should be
accurate to +0.05 units at 25 "C.
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11870 Federal Register / Vol. 55. No. 61 /Thursday. March 29. 1990 / Rules and Regulations
TABLE 5.—SurrABLE FILTER MECMA *
Cowpafty
MHIipore Corporation «..„ -~.«. ,..™™,.™,..
Nucleoporo Cofpof^tion.«.«..«. .~_. .,„,....., ....
Whatman laboratory Products, Inc. ..»»»„, ..,»,,,. 1,J1.Jllil,,.J
Micro Filtration Systems
Location
Bedford, MA (800) 225-3384
Pleasamon, CA (415) 463-2530
Qilton, NJ C01) 773-5800..
Dublin, CA (800) 334-7132 (415) 828-6010
Model
AP40 ._
211625 ___. , . ,.__ ._,
Qff . . .. j
GF7S
Pore size
0.7
0.7
0.7
0.7
1 Any titter mat meets the specifications in Section 4.4 of trie Method is suitable.
4.8 ZHE extract collection devices:
TEDLAR" bags or glass, stainless steel or
PTFE gas-tight syringes are used to collect
the initial liquid phase and the final extract of
the waste when using the ZHE device. The
devices listed are recommended for use
under the following conditions:
4.8.1 If a waste contains an aqueous
liquid phase or if a waste does not contain a
significant amount of nonaqueoua liquid (i.e..
1 percent of total waste),
the syringe or the TEDLAR* bag may be used
for both the initial solid/liquid separation
and the final extract filtration. However,
analysts should use one or the other, not
both.
4.0.3 If the waste contains no initial liquid
phase (is 100 percent solid) or has no
significant solid phase (is 100 percent liquid),
either the TEDLAR* bag or the syringe may
be used. If the syringe is used, discard the
first 5 mL of liquid expressed from the device.
The remaining aliquots are used for analysis.
4.7 ZHE extraction fluid transfer devices:
Any device capable of transferring the
extraction fluid into the ZHE without
changing the nature of the extraction fluid is
acceptable (e.g., a positive displacement or
peristaltic pump, a gas tight syringe, pressure
filtration unit (See Step 4.3.2), or other ZHE
device).
4.0 Laboratory balance: Any laboratory
balance accurate to within +0.01 grams may
be used (all weight measurements are to be
within 4-0.1 grams).
5,0 Reagents
5,1 Reagent water. Reagent water is
defined as water in which an interferant is
not observed at or above the methods
detection limit of the analyte(s) of interest
For nonvolatile extractions, ASTM Type 11
water or equivalent meets the definition of
reagent water. For volatile extractions, it is
recommended that reagent water be
generated by any of the following methods.
Reagent water should be monitored
periodically for impurities.
5.1.1 Reagent water for volatile
extractions may be generated by passing tap
water through a carbon filter bed containing
about 500 grams of activated carbon (Calgon
Corp.. Filtrasorb-300 or equivalent).
5.1.2 A water purification system
(Millipore Super-Q or equivalent) may also be
used to generate reagent water for volatile
extractions.
* TEDLAR" is a registered trademark of Du Pont
5.1.3 Reagent water for volatile
extractions may also be prepared by boiling
water for 15 minutes. Subsequently, while
maintaining the water temperature at 90 +5
*C, bubble a contaminant-free inert gas (e.g,
nitrogen) through the water for 1 hour. While
still hot transfer the water to a narrow mouth
screw-cap bottle under zero-headspace and
sea! with a Teflon-lined septum and cap.
5.2 Hydrochloric acid (IN), HO. made
from ACS reagent grade.
5.3 Nitric acid (IN), HNO», made from
ACS reagent grade.
5.4 Sodium hydroxide (IN), NaOH, made
from ACS reagent grade.
5.5 Glacial acetic acid. HOAc, ACS
reagent grade.
5.8 Extraction fluid.
5.6.1 Extraction fluid #1: Add 5.7 mL
glacial HOAc to 500 mL of the appropriate
water (See Step 5.1). add 84 J mL of IN
NaOH. and dilute to a volume of 1 liter.
When correctly prepared, the pH of this fluid
will be 4.93 +0,05.
5.8.2 Extraction fluid #2 Dilute 5-7 mL
glacial HOAc with ASTM Type 11 water (See
Step 5.1) to • volume of 1 liter. When
correctly prepared, the pH of this fluid will be
2.88+005.
Note: These extraction fluids should be
monitored frequently for impurities. The pH
should be checked prior to use to ensure that
these fluids are made up accurately. If
impurities are found or the pH is not within
the above specification*, the fluid shall be
discarded and fresh extraction fluid
prepared.
5.7 Analytical standards prepared
according to the appropriate analytical
method.
5.0 Sample Collection, Preservation, and
Handling
8.1 All samples shall be collected using
an appropriate sampling plan.
82 The TCLP may place requirements on
the minimal size of the field sample
depending upon the physical state or states of
the waste and the contaminants of concern.
An aliquot is needed for preliminary
evaluation of which extraction fluid is to be
used for the nonvolatile contaminant
extraction procedure. Another aliquot may be
needed to actually conduct the nonvolatile
extraction (see section 1.4 concerning the use
of this extract for volatile organic*). If
volatile organics are of concern, another
' aliquot may be needed. Quality control
measures may require additional aliquots.
Further, it is always wise to collect more
sample just in case something goes wrong
with the initial attempt to conduct the test
8.3 Preservatives shall not be added to
samples.
8.4 Samples may be refrigerated unless
refrigeration results in irreversible physical
change to the waste. If precipitation occurs,
the entire sample (including precipitate)
should be extracted.
6.5 When the waste is to be evaluated for
volatile contaminants, care shall be taken to
minimize the loss of volatile*. Samples shall
be taken and stored in a manner to prevent
the lost of volatile contaminants (e.g..
samples should be collected in Teflon-lined
septum capped vials and stored at 4 "C, until
ready to be opened prior to extraction).
8.8 TCLP extracts should be prepared for
analysis and analyzed as soon as possible
following extraction. Extracts or portions of
extracts for metallic contaminant
determinations must be acidified with nitric
acid to a pH <2» unless precipitation occurs
(see section 8.14 if precipitation occurs).
Extracts or portions of extract* for organic
contaminant determinations shall not be
allowed to come into contact with the
atmosphere (i.e., no headspace) to prevent
losses. See section 10.0 (QA requirements) for
acceptable sample and extract holding times.
7,0 Preliminary Evaluations
Perform preliminary TCLP evaluations on a
minimum 100 gram aliqout of waste. This
aliquot may not actually undergo TCLP
extraction. These preliminary evaluations
include; (1) determination of the percent
solids; (2) determination of whether the waste
contain* insignificant solids and is, therefore.
its own extract after filtration; (3)
determination of whether the solid portion of
the waste requires particle size reduction:
and (4) determination of which of the two
extraction fluids are to be used for the
nonvolatile TCLP extraction of the waste.
7.1 Preliminary determination of percent
solids: Percent solids is defined as that
fraction of a waste sample (as a percentage
of the total sample) from which no liquid may
be forced out by an applied pressure, as
described below.
7.1.1 If the waste will obviously yield no
free liquid when subjected to pressure
filtration (i.e., is 100% solids) proceed to Step
7.X
7,1.2 If the sample is liquid or multiphasic,
liquid/solid separation to make a preliminary
determination of percent solids is required.
This involves the filtration device described
in Step 4.3.2 and is outlined in Steps 7.1.3
through 7.1.9,
7.1 J Pre-weigh the filter and the
container that will receive the filtrate.
7.1.4 Assemble the filter holder and filter
following the manufacturer's instructions.
Place the filter on the support screen and
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OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55, No, 81 / Thursday, March 29, 1990 / Rules and Regulations 11871
7.1.5 Weigh out a aubsample of the waste
(100 grant minimum) and record the weight
7.1.8 Allow slurries to stand to permit the
solid phase to settle. Wastes that settle
slowly may be centrifuged prior to filtration.
Centrifugation is to be used only as an aid to
filtration. If used, the liquid should be
decanted and filtered followed by filtration of
the solid portion of the waste through the
same filtration system.
7.1.7 Quantitatively transfer the waste
sample to the filter holder (liquid and solid
phases). Spread the waste sample evenly
over the surface of the filter. If filtration of
the waste at 4 *C reduces the amount of
expressed liquid over what would be
expressed at room temperature then allow
the sample to warm up to room temperature
in the device before filtering.
Note: If waste material (>1 percent of
original sample weight) has obviously
adhered to the container used to transfer the
sample to the filtration apparatus, determine
the weight of this residue and subtract it from
the sample weight determined in Step 7.1.5 to
determine the weight of the waste sample
that will be filtered.
Gradually apply vacuum or gentle pressure
of 1-10 psi, until air or pressurizing gas moves
through the filter. If this point is not reached
under 10 psi. and if no additional liquid has
passed through the filter in any 2-minute
interval, slowly increase the pressure in 10-
psi increments to a maximum of SO psi. After
each incremental increase of 10-psi. if the
pressurizing gas has not moved through the
filter, and if no additional liquid has passed
through the filter in any 2-minute interval,
proceed to the next 10-psi increment. When
the pressurizing gas begins to move through
the filter, or when liquid flow has ceased at
SO psi (i.e., filtration does not result in any
additional filtrate within any 2-minute
period), stop the filtration.
Note: Instantaneous application of high
pressure can degrade the glass fiber filter and
may cause premature plugging.
7,1.8 The material in the filter holder is
defined as the solid phase of the waste, and
the filtrate is defined as the liquid phase.
Note: Some wastes, such as oily wastes
and some paint wastes, will obviously
contain some material that appears to be a
liquid. Even after applying vacuum or
pressure filtration, as outlined in Step" 7.1,7,
this material may not fitter. If this is the case.
the material within the filtration device is
defined as a solid. Do not replace the original
filter with a fresh filter under any
circumstances. Use only one filter.
7.1.9 Determine the weight of the liquid
phase by subtracting the weight of the filtrate
container (see Step 7.1,3) from the total
weight of the filtrate-filled container.
Determine the weight of the solid phase of
the waste sample by subtracting the weight
of the liquid phase from the weight of the
total waste sample, as determined in Su>p
7.1.5 or 7.1,7,
Record the weight of the liquid and solid
phases. Calculate the portent solids as
follows:
Percent solids = •
Weight of solid (Step 7.1.9)
Total weight of waste (Step 7.1.5 or 7.1.7)
X 100
7.2 If the percent solids determined in
Step 7.1,9 is equal to or greater than 0.5%,
then proceed either to Step 7.3 to determine
whether the solid material requires particle
size reduction or to Step 7.2.1 if it is noticed
that a small amount of the filtrate is
entrained in wetting of the filter. If the
percent solids determined in Step 7.1.9 is less
than 0,3%, then proceed to Step 8.9 if the
nonvolatile TCLP is to be performed and to
section 9.0 with a fresh portion of the waste if
the volatile TCLP is to be performed.
7.2.1 Remove the solid phase and filter
from the filtration apparatus.
7.2.2 Dry the filter and solid phase at 100
+ 20 "C until two successive weighing yield
the same value within +1 percent Record
the final weight.
Note: Caution should be taken to ensure
that the subject solid will not flash upon
heating. It is recommended that the drying
oven be vented to a hood or other
appropriate device.
7.2.3 Calculate the percent dry solids as
follows:
Percent dry solids =
(Weight of dry waste 4-filter)—tared weight of filter
Initial weight of waste (Step 7.14 or 7.1.7)
X 100
7.2.4 If the percent dry solids is less than
0.3 percent then proceed to Step 8.9 if the
nonvolatile TCLP is to be performed, and to
Section 9.0 if the volatile TCLP is to be
performed. If the percent dry solids is greater
than or equal to 0.5%, and if the nonvolatile
TCLP is to be performed, return to the
beginning of this Section (7.0) and, with a
fresh portion of waste, determine whether
particle size reduction is necessary (Step 7.3)
and determine the appropriate extraction
fluid (Step 7.4). If only the volatile TCLP is to
be performed, see the note in Step 7.4.
7,3 Determination of whether the waste
requires particle-size reduction (particle-size
is reduced during this step): Using the solid
portion of the waste, evaluate the solid for
particle size. Particle-size reduction is
required, unless the solid has a surface area
per gram of material equal to or greater than
3.1 cm2, or is smaller than 1 cm in its
narrowest dimension (i.e., is capable of
passing through a 9.5 nun (0.37S inch)
standard sieve). If the surface area is smaller
or the particle size larger than described
above, prepare the solid portion of the waste
for extraction by crushing, cutting, or grinding
the waste to a surface area or particle-size as
described above. If the solids are prepared
for organic volatiles extraction, special
precautions must be taken, see Step 9.6.
Note: Surface area criteria are meant for
filamentous (e.g., paper, cloth, and similar)
waste materials. Actual measurement of
surface area is not required, nor is it
recommended. For materials that do not
obviously meet the criteria, sample-specific
methods would need to be developed and
employed to measure the surface area. Such
methodology is currently not available,
7,4 Determination of appropriate
extraction fluid: If the solid content of the
waste is greater than or equal to O.S percent
and if TCLP extraction for nonvolatile
constituents will take place (Section 8.0),
perform the determination of the appropriate
fluid (Step 5.6) to use for the nonvolatiles
extraction as follows:
Note: TCLP extraction for volatile
constituents uses only extraction fluid *1
(Step 5.6.1). Therefore, if TCLP extraction for
nonvolatiles i« not required, proceed to
Section 9.0.
7.4.1 Weigh out a small subsample of the
solid phase of the waste, reduce the solid (if
necessary) to a particle-size of approximately
1 mm in diameter or less, and transfer 5.0
grams of the solid phase of the waste to a
500-mL beaker or Erlenmeyer flask.
7.4.2 Add 96,5 mL of reagent water
(ASTM Type II) to the beaker, cover with a
watchglass, and stir vigorously for 5 minutes
using a magnetic stirrer. Measure and record
the pH. If the pH is 5.0. add
3.5 mL IN HC1, slurry briefly, cover with a
watchglass, heat to SO °C. and hold at 50 *C
for 10 minutes.
7.4.4 Let the solution cool to room
temperature and record the pH. if the pH is
<5.0, use extraction fluid wi. If the pH is
> 5.0, use extraction fluid #2. Proceed to
Section 8.0.
7.5 If the aliquot of the waste used for the
preliminary evaluation (Steps 7.1-7.4) was
determined to be 100% solid at Step 7.1.1,
then it can be used for the Section 8.0
extraction (assuming at least 100 grams
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11872 Federal Register / Vol. 55, No. 61 / Thursday. March 29, 1990 / Rules and Regulations
remain), and the section 9.0 extraction
(assuming at least 25 grams remain). If the
aliquot was subjected to the procedure in
Step 7.1,7, then another aliquot shall be used
for the volatile extraction procedure in
Section 9,0. The aliquot of the waste
subjected to the procedure in Step 7.1,7 might
be appropriate for use for the section 8,0
extraction if an adequate amount of solid (as
determined by Step 7.1.9) was obtained. The
amount of solid necessary is dependent upon
whether a sufficient amount of extract will be
produced to support the analyses. If an
adequate amount of solid remains, proceed to
Step 8.10 of the nonvolatile TCLP extraction.
8.0 Procedure When Volatiles Are Not
Involved
A minimum sample size of 100 grams (solid
and liquid phases) is required. In some cases,
a larger sample size may be appropriate,
depending on the solids content of the waste
sample (percent solids. See Step 7.1), whether
the initial liquid phase of the waste will be
miscible with the aqueous extract of the
solid and whether inorganics, semi volatile
organics, pesticides, and herbicides are all
analytes of concern. Enough solids should be
generated for extraction such that the volume
of TCLP extract will be sufficient to support
all of the analyses required. If the amount of
extract generated by a single TCLP extraction
will not be sufficient to perform all of the
analyses, more than one extraction may be
performed and the extracts from each
combined and aliquoted for analysis.
8.1 If the waste will obviously yield no
liquid when subjected to pressure filtration
(i.e., is 100 percent solid, see Step 7.1), weigh
out a subsample of the waste (100 gram
minimum) and proceed to Step 8.9.
8.2 If the sample is liquid or multiphasic.
liquid/solid separation is required. This
involves the filtration device described in
Step 4.3.2 and la outlined in Steps 8.3 to 8.8.
8.3 Pre-weigh the container that will
receive the filtrate.
8.4 Assemble the filter holder and filter
following the manufacturer's instructions.
Place the filter on the support screen and
secure. Acid wash the niter if evaluating the
mobility of metals (see Step 4.4).
Note: Acid washed filters may be used for
all nonvolatile extractions even when metals
are not of concern.
8 J Weigh out a subsample of the waste
(100 gram minimum) and record the weight. If
the waste contains <0.5 percent dry solids
(Step 72), the liquid portion of the waste.
after filtration, is defined as the TCLP
extract. Therefore, enough of the sample
should be filtered so that the amount of
filtered liquid will support all of the analyses
required of the TCLP extract. For wastes
containing >0.5 percent dry solids (Step 7.1
or 7,2), use the percent solids information
obtained in Step 7.1 to determine the
optimum sample size (100 gram minimum] for
filtration. Enough solids should be generated
by filtration to support the analyses to be
performed on the TCLP extract
8.8 Allow slurries to stand to permit the
solid phase to settle. Wastes that settle
slowly may be centrifuged prior to filtration.
Use centrifugation only as an aid to filtration.
If the waste is centrifuged. the liquid should
be decanted and filtered followed by
filtration of the solid portion of the waste
through the same filtration system.
8.7 Quantitatively transfer the waste
sample (liquid and solid phases) to the filter
holder (see Step 4.3.2). Spread the waste
•ample evenly over the surface of the filter. If
filtration of the waste at 4 *C reduces the
amount of expressed liquid over what would
be expressed at room temperature, then
allow the sample to warm up to room
temperature in the device before filtering.
Not« If waste material (>l percent of the
original sample weight] has obviously
adhered to the container used to transfer the
sample to the filtration apparatus, determine
the weight of this residue and subtract it from
the sample weight determined in Step 8.5, to
determine the weight of the waste sample
that will be filtered.
Gradually apply vacuum or gentle pressure
of 1-10 psi, until air or pressurizing gas moves
through the filter. If this point is not reached
under 10 psi, and if no additional liquid has
passed through the filter in any 2-minute
interval, slowly increase the pressure in 10-
psi increments to a maximum of SO psi. After
each incremental increase of 10 psi. if the
pressurizing gas has not moved through the
filter, and if no additional liquid has passed
through the filter in any 2-minute interval
proceed to the next 10-psi increment When
the pressurizing gas begins to move through
the filter, or when the liquid flow has ceased
at SO psi (i.e., filtration does not result in any
additional filtrate within a 2-minute period),
stop the filtration.
Note: Instantaneous application of high
pressure can degrade the glass fiber filter and
may cause premature plugging.
8.8 The material in the filter holder is
defined as the solid phase of the waste, and
the filtrate is defined as the liquid phase.
Weigh the filtrate. The liquid phase may now
be either analyzed (See Step 8.12) or stored at
4 *C until time of analysis.
Note: Some wastes, such as oily wastes
and some paint wastes, will obviously
contain some material that appears to be a
liquid. Even after applying vacuum or
pressure filtration, as outlined in Step 8.7, this
material may not filter. If this is the case, the
material within the filtration device is
defined as a solid and is carried through the
extraction as a solid. Do not replace the
original filter with a fresh filter under any
circumstances. Use only one filter.
8.9 If the waste contains <0.5 percent dry
solids (see Step 7.2), proceed to Step 8.13. If
the waste contains >0.5 percent dry solids
(see Step 7.1 or 72), and if particle-size
reduction of the solid was needed in Step 7.3.
proceed to Step 8.10, If the waste as received
passes a 9.S nun sieve, quantitatively transfer
the solid material into the extractor bottle
along with the filter used to separate the
initial liquid from the solid phase, and
proceed to Step 6.11.
8.10 Prepare the solid portion of the waste
for extraction by crushing, cutting, or grinding
the waste to a surface area or particle-size as
described in Step 7.3. When the surface area
or particle-size has been appropriately
altered, quantitatively transfer the solid
material into an extractor bottle. Include the
filter used to separate the initial liquid from
the solid phase.
Note: Sieving of the waste is not normally
required. Surface area requirements are
meant for filamentous (e.g., paper, cloth) and
similar waste materials. Actual measurement
of surface area is not recommended. If
sieving is necessary, a Teflon-coated sieve
should be used to avoid contamination of the
sample.
8.11 Determine the amount of extraction
fluid to add to the extractor vessel as follows;
Weight of extraction fluid
20 X percent solids (Step 7.1 )X weight of waste filtered (Step 8,5 or 8,7]
100
Slowly add this amount of appropriate
extraction fluid (see Step 7.4) to the extractor
vessel. Close the extractor bottle tightly (it is
recommended that Teflon tape be used to
ensure a tight seal), secure in rotary agitation
device, and rotate at 30+2 rpm for 18+2
hours. Ambient temperature (i.e., temperature
of room in which extraction takes place) shall
be maintained at 22 +3 *C during the
extraction period.
Note: As agitation continues, pressure may
build up within the extractor bottle for some
types of wastes (e.g., limed or calcium
carbonate containing waste may evolve
gases such as carbon dioxide). To relieve
excess pressure, the extractor bottle may be
periodically opened (e.g., after 15 minutes, 30
minutes, and 1 hour) and vented into a hood.
8,12 Following the 18+2 hour extraction,
separate the material in the extractor vessel
into its component liquid and solid phases by
filtering through a new glass fiber filter, as
outlined in Step 8.7. For final filtration of the
TCLP extract, the glass fiber filter may b*
changed, if necessary, to facilitate filtration.
Filters) shall be acid-washed (see Step 4.4) if
evaluating the mobility of metals.
8,13 Prepare the TCLP extract as follows:
8.13.1 If the waste contained no initial
liquid phase, the filtered liquid material
obtained from Step 8.12 is defined as the
TCLP extract Proceed to Step 8,14.
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Federal Register / Vol. 55. No. 61 / Thursday. March 29, 1990 / Rules and Regulations
11873
8.13.2 If compatible (e.g.. multiple phases
will not result on combination), combine the
filtered liquid resulting from Step 8.12 with
the initial liquid phase of the waste obtained
in Step 8,7. This combined liquid is defined as
!he TCLP extract. Proceed to Step 8,14.
8.13.3 If the ini lial liquid phase of the
waste, as obtained from Step 8.7, ia not or
may not be compatible with the filtered liquid
resulting from Step 8.12. do not combine these
liquids. Analyze these liquids, collectively
defined as the TCLP extract, and combine the
results mathematically, as described in Step
8.14.
8.14 Following collection of the TCLP
extract, the pH of the extract should be
recorded. Immediately aliquot and preserve
the extract for analysis. Metals aliquots must
be acidified with nitric acid to pH<2. If
precipitation is observed upon addition of
nitric acid to a small aliquot of the extract,
then the remaining portion of the extract for
metals analyses shall not be acidified and the
extract shall be analyzed as soon as possible.
All other aliquots must be stored under
refrigeration (4 *C) until analyzed. The TCLP
extract shall be prepared and analyzed
according to appropriate analytical methods.
TCLP extracts to be analyzed for metals shall
be acid digested except in those instances
where digestion causes loss of metallic
contaminants. If an analysis of the
undigested extract shows that the
concentration of any regulated metallic
contaminant exceeds the regulatory level,
then the waste is hazardous and digestion of
the extract is not necessary. However, data
on undigested extracts alone cannot be used
to demonstrate that the waste is not
hazardous. If the individual phases are to be
analyzed separately, determine the volume of
the individual phases (to +0.5 percent],
conduct the appropriate analyses, and
combine the results mathematically by using
a simple volume-weighted average:
Final analyte concentration
where:
Vi =The volume of the first phase (L).
Ci =The concentration of the contaminant of
concern in the first phase (mg/L).
Vj =The volume of the second phase (L).
Ca=The concentration of the contaminant of
concern in the second phase fmg/L).
8,15 Compare the contaminant
concentrations in the TCLP extract with the
thresholds identified in the appropriate
regulations. Refer to { 10-0 for quality
assurance requirements.
9.0 Procedure When VolatHes Are Involved
Use the ZHE device to obtain TCLP extract
for analysis of volatile compounds only.
Extract resulting from the use of the ZHE
shall not be used to evaluate the mobility of
nonvolatile analytes (e.g., metals, pesticides,
etc.).
The ZHE device has approximately a 500-
mL internal capacity. The ZHE can thus
accommodate a maximum of 25 grams of
solid (defined as that fraction of a sample
from which no additional liquid may be
forced out by an applied pressure of 50 psi),
due to the need to add an amount of
extraction fluid equal to 20 times the weight
of the solid phase.
Charge the ZHE with sample only once and
do not open the device until the final extract
(of the solid) has been collected. Repeated
filling of the ZHE to obtain 25 grams of solid
is not permitted.
Do not allow the waste, the initial liquid
phase, or the extract to be exposed to the
atmosphere for any more time than is
absolutely necessary. Any manipulation of
these materials should be done when cold (4
°C) to minimize loss of volatiles.
9.1 Pre-weigh the (evacuated) filtrate
collection container (See Step 4.G) and set
aside. If using a TEDLAR" bag. express ail
liquid from the ZHE device into the bag,
whether for the initial or final liquid/solid
separation, and take an aliquot from the
liquid in the bag for analysis. The containers
listed in Step 4.6 are recommended for use
under the conditions stated in 4.8.1—1.6,3.
92 Place the ZHE piston within the body
of the ZHE (it may be helpful first to moisten
the piston O-rings slightly with extraction
fluid]. Adjust the piston within the Zl IE body
to a height that will minimize the distance the
piston will have to move once the ZHE is
charged with sample (based upon sample size
requirements determined from Section 9.0,
Step 7.1 and/or 7.2). Secure the gas inlet/
outlet flange (bottom flange) onto the ZHE
body in accordance with the manufacturer's
instructions. Secure the glass fiber filter
between the support screens and set aside.
Set liquid inlet/outlet flange (top flange)
aside,
9.3 If the waste is 100 percent solid {seu
Step 7.1), weigh out a subsainpie (25 gram
maximum) of the waste, record weight, and
proceed to Step 9.5.
9.4 If the waste contains <0,5 percent dry
solids (Step 7.2), the liquid portion of waste,
after filtration, is defined as the TCLP
extract. Filter enough of the sample so that
the amount of filtered liquid will support atl
of She volatile analyses required. For wastes
containing >0.5 percent dry solids (Steps 7.1
and/or 7.2), use the percent solids
information obtained in Step 7,1 to determine
the optimum sample size to charge into ths
ZHE. The recommended sample size is as
follows:
9.4.1 For wastes containing e Step 7,1), weigh out a 500-gram
subsampte of waste and record the weight.
9.4.2 For wastes containing >0.5 percent
sulids (see Step 7.1), determine the amount of
waste to charge into the ZHE as follows:
Weight of waste to change ZHE = •
25
Percent solids (Step 7.1)
•— Y, ino
Weigh out a subsample of the waste of the
appropriate size and record the weight
9.5 If particle-size reduction of the solid
portion of the waste was required in Step 7.3,
proceed to Step 9.9. If particle-size reduction
was not required in Step 7.3. proceed to Step
9.7.
9,9 Prepare the waste for extraction by'
crushing, cutting, or grinding the solid portion
of the waste to a surface area or particle-size
as described in Step 7,3,1, Wastes and
appropriate reduction equipment should be
refrigerated, if possible, to 4 °C prior to
particle-size reduction. The means used to
effect particle-size reduction must not
generate heat in and of itself. If reduction of
the solid phase of the waste is necessary,
exposure of the waste to the atmosphere
should be avoided to the extent possible.
Note: Sieving of the waste is not
recommended due to the possibility that
volatiles may be lost. The use of an
appropriately graduated ruler is
recommended as an acceptable alternative.
Surface area requirements are meant for
filamentous (e.g., paper, cloth) and similar
waste materials. Actual measurement of
surface area is not recommended.
Whim the surface area or particle-size has
been appropriately altered, proceed to Step
9.7.
9.7 Waste slurries need not be allowed to
stand to permit the solid phase to settle. Do .
not centrifuge wastes prior to filtration.
9.8 Quantitatively transfer the entire
samole (liquid and solid phases) quickly to
the ZHE. Secure the filter and support
screens onto the top flange of the device and
secure the top flange to the ZHE body in
accordance with the manufacturer's
instructions. Tighten all ZHE fittings and
place the device in the vertical position (gas
-------
11874
Federal Register / Vol. 55, No. 61 / Thursday, March 29. 1990 / Rules and Regulations
inlet/outlet flange on the bottom). Do not
attach the extract collection device to the top
plate.
Note: If waste material (>1% of original
sample weight) has obviously adhered to the
container used to transfer the sample to the
ZHE, determine the weight of this residue
and subtract it from the sample weight
determined in Step 9.4 to determine the
weight of the waste sample that will be
filtered.
Attach a gas line to the gas inlet/outlet
valve (bottom flange) and, with the liquid
inlet/outlet valve (top flange) open, begin
applying gentle pressure of 1-10 psi (or more
if necessary) to force all headspace slowly
out of the ZHE device into a hood. At the first
appearance of liquid from the liquid inlet/
outlet valve, quickly close the valve and
discontinue pressure. If filtration cf the waste
at 4 *C reduces the amount of expressed
liquid over what would be expressed at room
temperature, then allow the sample to warm
up to room temperature in the device before
filtering. If the waste is 100 percent solid (see
Step 7,1). slowly increase the pressure to a
maximum of SO psi to force most of the
headspace out of the device and proceed to
Step 9.12.
9.9 Attach the evacuated pre-weighed
filtrate collection container to the liquid
inlst/outlet valve and open the valve. Begin
applying gentle pressure of 1-10 psi to force
the liquid phase of the sample into the filtrate
collection container. If no additional liquid
has passed through the filter in any 2-minute
interval, slowly increase the pressure in 10-
psi increments to a maximum of SO psi. After
each incremental increase of 10 psi, if no
additional liquid has passed through the filter
in any 2-minute interval, proceed to the next
10-psi increment. When liquid flow has
ceased such that continued pressure filtration
at 50 psi does not result in any additional
filtrate within a 2-minute period, stop the
filtration. Close the liquid inlet/outlet valve.
discontinue pressure to the piston, and
disconnect and weigh the filtrate collection
container.
Note; Instantaneous application of high
pressure can degrade the glass fiber filter and
may cause premature plugging.
9.10 The material in the ZHE is defined as
the solid phase of the waste and the filtrate is
defined as the liquid phase.
Note: Some wastes, such as oily wastes
and some paint wastes, will obviously
contain some material that appears to be a
liquid. Even after applying pressure filtration.
this material will not filter. If this is the case,
the material within the filtration device is
defined as a solid and is carried through the
TCLP extraction as a solid.
If the original waste contained <0,5
percent dry solids (see Step 7.2), this filtrate
is defined as the TCLP extract and is
analyzed directly. Proceed to Step 9.15.
9.11 The liquid phase may now be either
analyzed immediately (See Steps 9.13 through
9.15) or stored at 4 *C under minimal
headspace conditions until time of analysis.
Determine the weight of extraction fluid «1 to
add to the ZHE as follows:
Weight of extraction fluid = •
20Xpercent solids (Step 7.1)x weight of waste filtered (Step 9.4 or 9.8)
100
9.12 The following steps detail how to
add the appropriate amount of extraction
fluid to the solid material within the ZHE and
agitation of the ZHE vessel. Extraction fluid
=1 is used in all cases (See Step 5.0).
9.12,1 With the ZHE in the vertical
position, attach a line from the extraction
fluid reservoir to the liquid inlet/outlet valve.
The line used shall contain fresh extraction
fluid and should be preftushed with fluid to
eliminate any air pockets in the line. Release
gas pressure on the ZHE piston (from the gas
inlet/outlet valve], open the liquid inlet/
outlet valve, and begin transferring extraction
fluid (by pumping or similar means) into the
ZHE. Continue pumping extraction fluid into
the ZHE until the appropriate amount of fluid
has been introduced into the device.
9.12.2 After the extraction fluid has been
added, immediately close the liquid inlet/
outlet valve and disconnect the extraction
fluid line. Check the ZHE to ensure that all
valves are in their closed positions. Manually
rotate the device in an end-over-end fashion
2 or 3 times. Reposition the ZHE in the
vertical position with the liquid inlet/outlet
valve on top. Pressurize the ZHE to 5-10 psi
(if necessary) and slowly open the liquid
inlet/outlet valve to bleed out any headspace
(into a hood) that may have been introduced
due to the addition of extraction fluid. This
bleeding shall be~done quickly and shall be
stopped at the first appearance of liquid from
the valve. Re-pressurize the ZHE with 5-10
psi and check all ZHE fittings to ensure that
they are closed.
9.12J Place the ZHE in the rotary
agitation apparatus (if it is not already there)
and rotate at 30+2 rpm for 18+2 hours.
Ambient temperature (i.e.. temperature of
room in which extraction occurs) shall be
maintained at 22-f 3 *C during agitation.
9.13 Following the 18+2 hour agitation
period, check the pressure behind the ZHE
piston by quickly opening and closing the gas
inlet/outlet valve and noting the escape of
gas. If the pressure has not been maintained
(i.e., no gas release observed), the device is
leaking. Check the ZHE for leaking as
specified in Step 4.2.1, and perform the
extraction again with a new sample of waste.
If the pressure within the device has been
maintained, the material in the extractor
vessel is once again separated into its
component liquid and solid phases. If the
waste contained an initial liquid phase, the
liquid may be filtered directly into the same
filtrate collection container (i.e., TEDLAR"
bag) holding the-initial liquid phase of the
waste. A separate filtrate collection container
must be used if combining would create
multiple phases, or there is not enough
volume left within the filtrate collection
container. Filter through the glass fiber filter.
using the ZHE device as discussed in Step
9.9. All extract shall be filtered and collected
if the TEDLAR* bag is used, if the extract is
multiphasic, or if the waste contained an
initial liquid phase (see Steps 4.6 and 9.1).
Note: An in-line glass fiber filter may be
used to filter the material within the ZHE if it
Is suspected that the glass fiber filter has
been ruptured.
9.14 If the original waste contained no
initial liquid phase, the filtered liquid
material obtained from step 9.13 is defined as
the TCLP extract. If the waste contained an
initial liquid phase, the filtered liquid
material obtained from Step 9.13 and the
initial liquid phase (Step 9.9) are collectively
defined as the TCLP extract.-
9.15 Following collection of the TCLP
extract, immediately prepare the extract for
analysis and store with minimal headspace at
4 °C until analyzed. Analyze the TCLP extract
according to the appropriate analytical
methods. If the individual phases are to be
analyzed separately (i.e.. an not miscibie),
determine the volume of the individual
phases (to 0.5%), conduct the appropriate
analyses, and combine the results
mathematically by using a simple volume-
weighted average:
Final analyte concentration
fVil (C.)+(V3) [C.1
V,+V,
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OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55, No, 61 / Thursday, March 29, 1990 / Rules and Regulations
11875
where:
Vi =The volume of the first phases (1).
Ci =The concentration of the contaminant of
concern in the first phase (mg/l).
Vj=The volume of the second phase {!).
d=The concentration of the contaminant of
concern in the second phase (mg/l),
9.18 Compare the contaminant
concentrations in the TCLP extract with the
thresholds identified in the appropriate
regulations. Refer to section 10.0 for quality
assurance requirements.
10.0 Quality Assurance Requirements
10.1 Maintain all data, including quality
assurance data, and keep it available for
reference or inspection.
10.2 A minimum of one blank (extraction
fluid *l) for every 10 extractions that have
been conducted in an extraction vessel shall
be employed as a check to determine if any
memory effects from the extraction
equipment are occurring.
10.3 A matrix spike shall be performed for
each waste unless the result exceeds the
regulatory level and the data is being used
solely to demonstrate that the waste property
exceeds the regulatory level. If more than one
sample of the same waste is being tested, a
matrix spike needs to be performed for every
twenty samples and the average percent
recovery applied to the waste
characterization.
10.3.1 Matrix spikes are to be added after
filtration of the TCLP extract and before
preservation. Matrix spikes should not be
added prior to TCLP extraction of the sample.
10.3.2 Matrix spike levels should be made
at the appropriate regulatory threshold limits.
However, if the extract contaminant
concentration is less than one half the
threshold limit, the spike level may be one
half the contaminant concentration but not
less than the quantitation limit or a fifth of
the threshold limit.
10.3.3 The purpose of the matrix spike is
to monitor the adequacy of the analytical
methods used on the TCLP extract and to
determine whether matrix interferences exist
in analyte detection. If the matrix spike
recoveries are less than 50%, then the
analytical methods are not performing
adequately or use of the methods is
inadequate. Use of internal calibration
quantitation methods, modification of the
analytical methods, or use of alternate
analytical methods may be needed to
accurately measure the contaminant
concentration in the TCLP extract.
10.3.4 Use of internal quantitation
methods is also required when the
contaminant concentration is within 20% of
the regulatory level. (See section 10.5
concerning the use of internal calibration
methods.)
10.3.5 Matrix spike recoveries are
calculated by the following formula:
Percent recovery =
A-B
X 100%
where A=the concentration of the spiked
sample,
B = the concentration of the unspiked
sample, and
C=the spike level
10.4 All quality control measures
described in the appropriate analytical
methods shall be followed,
10.5 The use of internal calibration
quantitation methods shall be employed for a
contaminant if: (1) Recovery of the
contaminant from the TCLP extract is not at
least 50% and the concentration does not
exceed the regulatory level, and (2) The
concentration of the contaminant measured
in the extract is within 20% of the appropriate
regulatory level.
10.5.1 The method of standard additions
shall be employed as the internal calibration
SAMPLE MAXIMUM HOLDING TIMES
[Days]
quantitation method for each metallic
contaminant.
10.5.1.1 The method of standard additions
requires preparing calibration standards in
the sample matrix rather than reagent water
or blank solution. It requires taking four
identical aliquots of the solution and adding
known amounts of standard to three of these
aliquots. The fourth aliquot is the unknown.
Preferably; the first addition should be
prepared so that the resulting concentration
is approximately 50% of the expected
concentration of the sample. The second and
third additions should be prepared so that the
concentrations are approximately 100% and
150% of the expected concentration of the
sample. All four aliquots are maintained at
the same final volume by adding reagent
water or a blank solution, and may need
dilution adjustment to maintain the signals in
the linear range of the instrumental
technique. All four aliquots are analyzed.
10.5.1.2 Prepare a plot, or subject data to
linear regression, of instrumental signals or
external-calibration-derived concentrations
as the dependent variable (y-axis) versus
concentrations of the additions of standard
as the independent variable (x-axis). Solve
for the intercept of the abscissa (the
independent variable, x-axis) which is the
concentration in the unknown.
10.5.1.3 Alternately, subtract the
instrumental sipal or extemal-calibration-
derived concentration of the unknown
(unspiked) sample from the instrumental
signals or external-calibration-derived
concentrations of the standard additions. Plot
or subject data to linear regression of the
corrected instrumental signals or external-
calibration-derived concentrations as the
dependent variable versus the independent
variable. Derive concentrations for unknowns
using the internal calibration curve as if it
were an external calibration curve.
10.6 Samples must undergo TCLP
extraction within the following time periods:
Volatile* . . __... .....
Seitii-vototiies « «..,...«- , . «. . _~«.
Mercury ............. ..«.«.™™ v^v.. ...Mll, . „.„,,.,.
Metals, except mercury.™.™... „
From:
Reid collection
To:
TCLP extraction
14
7
28
180
From:
TCLP extraction •
To:
Preparative extraction
NA
7
NA
NA
From:
Preparative extraction
To:
Determinative analysis
14
40
28
180
Total elapsed tima
28
54
56
360
NA = Not applicable.
If sample holding times are exceeded, the
values obtained will be considered minimal
concentrations. Exceeding the holding time is
not acceptable in establishing that a waste
does not exceed the regulatory level.
Exceeding the holding time will not
invalidate characterization if the waste
exceeds the regulatory level.
PART 264—STANDARDS FOR
OWNERS AND OPERATORS OF
HAZARDOUS WASTE TREATMENT,
STORAGE, AND DISPOSAL
FACILITIES
7. The authority citation for part 284
continues to read as follows:
Authority: 42 U.S.C. 6905,6912. 6924, and
6925.
8. Section 264.301 is amended by
revising paragraph (e)(l) to read as
follows:
§ 264.301 Design and operating
requirements.
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11878 Federal Register / Vol. 55, No. 61 / Thursday, March 29, 199Q / Rules and Regulations
(a) * ' *
(1) The monofill contains only
hazardous wastes from foundry furnace
emission controls or metal casting
molding sand, and such wastes do not
contain constituents which would
render the wastes hazardous for reasons
other than the Toxicity Characteristic in
I 261,24 of this chapter, with EPA
Hazardous Waste Numbers D004
through D017; and
PART 2SS—INTERIM STATUS*
STANDARDS FOR OWNERS AND
OPERATORS OF HAZARDOUS WASTi
TREATMENT STORAGE, AND
DISPOSAL FACILITIES
. 9. The authority citation of part 265
continues to read as follows:
Authority: 42 U.S.C. 6905.6912(a). 6924,
6925, and 6935.
10, Section 285.221 is amended by
revising paragraph (d)(l) to read as
follows:
§ 265.221 Design requirements.
*****
(d)' * *
(1) The monofill contains only
hazardous wastes from foundry furnace
emission controls or metal casting
molding sand, and such wastes do not
contain constituents which would
render the wastes hazardous for reasons
other than the Toxicity Characteristic in
§ 261.24 of this chapter, with EPA
Hazardous Waste Numbers D004
through D017; and
*****
11. Section 281.273 is amended by
revising paragraph (a) to read as
follows;
§265.273 Waste analysis.
*****
(a) Determine the concentrations in
the waste of any substances which
equal or exceed the maximum
concentrations contained in Table 1 of
§ 261.24 of this chapter that cause a
waste to exhibit the Toxicity
Characteristic;
PART 268—LAND DISPOSAL
RESTRICTIONS
12. The authority citation for part 268
continues to read as follows:
Authority: 42 U.S.C. 6905, 6912[a), 6921. and
6924.
13. Appendix I of part 268 is revised to
read as follows:
Appendix I—Toxicity Characteristic
Leaching Procedure (TCLP)
Note: The TCLP is published in Appendix II
of part 261.
PART 271—REQUIREMENTS FOR
AUTHORIZATION OF STATE
HAZARDOUS WASTE PROGRAMS
14. The authority citation for part 271
continues to read as follows:
Authority: 42 U.S.C. 6905, 6912(a), and 6925.
15. Section 271.1, paragraph (j), the
heading of Table 1 is republished, and
Table 1 is amended by adding the
following entry in chronological order
by date of promulgation to read as
follows:
§ 271.1 Purpose and scop*.
*****
0) * ' *
TABLE 1.—REGULATIONS IMPLEMENTING THE HAZARDOUS AND SOLID WASTE AMENDMENTS OF 1984
Promulgation date
Title of regulation
Federal Register reference
Effective date
March 29,1990..._
....—....— Toxicity characteristic..
[Insert FR reference on date of publi-
cation].
September 25,1990
PART 302—DESIGNATION,
REPORTABLE QUANTITIES, AND
NOTIFICATION
16. The authority citation for part 302
continues to read as follows:
Authority: 42 U.S.C. 9602; 33 U.S.C. 1321
and 1361.
17. Section 302,4 is amended by
revising under the column Hazardous
Substance the entry "Unlisted
Hazardous Wastes Characteristic of EP
Toxicity" to read "Unlisted Hazardous
Wastes Characteristics:" and by
revising the entry "Characteristic of EP
Toxicity" and its sub entries to read as
follows:
§ 302.4 Designation of hazardous
substances.
TABLE 302.4.—LIST OF HAZARDOUS SUBSTANCES AND REPORTABLE QUANTITIES
Hazardous substance
CASRN
Regulatory synonyms
HQ
Statutory
final RQ
Cadet
RCRA
waste
numoer
Category Pounds (Kg)
Characteristic of Toxicity:
Arsenic (D004)
Barium (D005),.
Benzene (0018)..
Cadmium (0006) ...—
Carbon teirachloride (D019)...
Chtonfane (DQ20)
Chtorobenzene (D021).™_—
Chloroform (0022) ,
Chromium (COOT)
o-Cresol (0023)
m-Cresol (D024)..-.«....««—
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
*1
•1
100O
*1
5.000
1
100
5,000
*1
1,000
1,000
4
4
1, 2, 3, 4
4
1,2,4
1,2,4
1,2,4
4
1.4
1,4
0004
D005
D01S
DOOB
0019
D020
0021
D022
D007
0023
0024
X
c
A
A
A
X
B
A
A
C
C
1 (0.454)
1,000 (454)
10 (4.54)
10 (4.54)
10 (4.54)
1 (0.454)
100 (45.4)
10 (4.54)
10 (4.54)
1.000 (454)
1,000 (454}
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Federal Register / Vol. 55, No. 61 / Thursday, March 29. 1990 / Rules and Regulations 11877
TABLE 302.4.—LIST OF HAZARDOUS SUBSTANCES AND HEPORTABLE QUANTITIES—Continued
Statutory
Hazardous substance
p-Cresol (0025),.,
Creso) (DQ26)
24-0(0016)
1,4-Dichlofobenzene (D027)
1.2-DJchtoroattiarw (0028)
1,1-Dtehloroetnylene (D029)..._
2,4-Dinitrototuene (D030)
Endrin (001 2) .
Heptachtor (and hydroxide) (0031)....
Hexachforobenzene (D032)
Hexachtorobutadiene (D033)
Hexachtoroethane (0034)
Lead (0008)
Lindana (0013)
Mercury (DQ09)
Msthoxyehter (0014)
Methyl ethyl ketona (0035)
Nitrobenzene (D038)
Pentachlorophenol (D037) .-...,
Pyridine (0038) ,
Selenium (001 0) „...,
Silver (0011)
Tetrachloroethyleng (D039)._
Toxaphene (D01 5).. .
Thrichloroethylena (0040)
2.4,5-Trichloroethylene (D041)
2,4,6-Trichlorophenol (0042)
2,4,5-TP (001 7)
Vinyi chloride (0043)
CASHN Regulatory synonyms
.... NA
N A
N A
.... N.A.
NA
.... N.A. _
_. NA. „
.... N.A. .
.... N.A.
.... N.A.
.... N,A. .. ,
.... N.A.
.... N.A. _
.. N A
.. NA
.... N.A. ..... .
.... NA _
.... N.A.
.. NA
.... N.A.
.... NA.
.... NA
.... N.A.
.... NA •
.... N.A.
.. . N A
.„ NA _.. . . „
.... N.A, ...... _,
.... N.A. -
* •
RQ
1.000
1,000
100
100
5,000
5,000
1,000
1
1
M
"1
'1
'1
1
M
... 1
'1
1.000
10
'1
M
'1
*1
1
1000
10
10
. 100
'1
*
Codet
1,
1,
1
1,2.
1,2,
1, 2,
1. 2,
1,
1,2,
2.
2.
2,
1,
1,
1,2,
1,2,
2,
1,
1,2,
1,
1,2,
1,
2,3,
*
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
RCRA
wasta
number
D025
D026
D016
0027
0028
D029
D030
0012
0031
0032
D033
0034
D008
0013
0009
0014
0035
0036
0037
0038
D010
0011
0039
D015
0040
0041
0042
0017
D043
*
Final HQ
Category
C
C
B
B
B
B
A
X
X
A
X
8
X
X
X
D
C
A
C
A
X
B
X
B
A
A
B
X
Pounds (Kg)
1,000 (454)
1,000 (45-4)
100 (45 4)
100 (45.4)
100 (45.4)
100 (454)
10 (4 54)
1 (0.454)
1 (0.454)
10 (4.54)
1 (0.454)
100 (454)
iff)
1 (0454)
t (0454)
1 (0454)
5.000 (2270)
1.000 (454)
10 (4 54)
1.000 (454)
10 (454)
1 (0454)
100 (454)
1 (0.464)
tOO (45.4)
10 (4 54)
10 (454j
100 (45.4)
1 (0.454)
*
t—indicates the statutory source as defined by 1, 2, 3, or 4 below.
"'—indicates that the 1-pound HQ is a CEHCLA statutory HQ.
#—indicates that the RQ is subject to change whan the assessment of potential carcmogemcity is completed.
|FR Doc. 90-6104 Filed 3-28-90: 8:45 am]
BILLING CODE «SW-SO-M
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OSWER DIR. NO. 9541.00-14
Friday
June 29, 1990
Part V
Environmental
Protection Agency
40 CFR Parts 261, 264, 265, 268, 271 and
302
Hazardous Waste Management System;
identification and Listing of Hazardous
Waste; Toxiclty Characteristic Revisions;
Final Rule
-------
26986 Federal Register / Vol. 55, No. 126 / Friday, June 29, 1990 / Rules and Regulations
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Parts 261,264,265,268,271
and 302
[SWH-FRL-3792-2;EPA/OSW-FR-90-014]
RIN 2050-AA78
Hazardous Waste Management
System; Identification and Listing of
Hazardous Waste; Toxicity
Characteristic Revisions
AOENCY: Environmental Protection
Agency.
ACTION; Final rule; corrections.
SUMMARY: On March 29,1990 (55 FR
11798), the Environmentl Protection
Agency (EPA) promulgated a rule to
revise the existing toxicity
characteristics, which are used to
identify those wastes which are
hazardous and thus subject to regulation
under subtitle C of the Resource
Conservation and Recovery Act (RCRA)
due to their potential to leach significant
concentrations of specific toxic
constituents. Since promulgation, the
Agency has found the need to make
corrections to the rale in order to ensure
consistency of the toxicity characteristic
leaching procedure (TCLP), Method
1311, with other methods contained in
Test Methods for Evaluating Solid
Waste (Physical/Chemical Methods),
SW-846 and to clarify the section on
quality assurance. This notice also
corrects several errors in the March 29,
1990 notice
DATES: Effective date: September 25,
1990. The effective date and compliance
dates are not changed by this document.
FOR FURTHER INFORMATION CONTACT:
For general information about this
notice, contact the RCRA/Superfund
Hotline at (800) 424-9346 (toll free) or
(202) 382-3000 in the Washington, DC
metropolitan area. For information on
specific aspects of this notice, contact
Steve Cochran, Office of Solid Waste
(OS-332), U.S. Environmental Protection
Agency, 401M Street SW, Washington,
DC 20460, (202) 475-8551.
I. SUPPLEMENTARY INFORMATION:
A. Background
On March 29,1990 (55 FR 11798), EPA
promulgated a rule to revise the existing
toxicity characteristics, which are used
to identify those wastes which are
hazardous and thus subject to regulation
under subtitle C of RCRA. The rule
broadened and refined the scope of the
hazardous waste regulatory program
and fulfilled specific statutory mandates
under the Hazardous and Solid Waste
Amendments of 1984.
Today's notice makes corrections to
appendix II of the regulatory language of
the March 29,1990 final rule. Method
1311, the TCLP. The method has been
reorganized to correspond to the current
version of Test Methods for Evaluating
Solid Waste (Chemical/Physical
Methods), SW-846. In addition, the
quality assurance section has been
renumbered and has been clarified to
eliminate confusion. Today's notice also
corrects several typographical errors
and other omissions that appeared In
the final rule revising the toxicity
characteristics.
The preamble to the March 29,1990
final rule stated that any person that
would like to use the TCLP before the
effective date of the rule (September 25,
1990) may do so in order to determine
whether the eight heavy metals and six
pesticides that are currently regulated
under the Extraction Procedure (EP)
Toxicity Characteristic leach at levels of
regulatory concern. This language was
included because the TCLP is required
for both waste determination (on
September 25,1990, the TC effective
date) and the land disposal restrictions
program. The Agency today is clarifying
that, while it is appropriate to use just
one leach test to fulfill both
requirements, persons that would like to
continue using the EP leach test until the
effective date of the TC rule may do so.
It should be notei however, that the EP
test may still be required as a matter of
state law, and this regulation does not
affect such state law requirements.
B. Method 1311 and Quality Assurance
Today's notice makes technical
corrections to mistakes made in Method
1311, and to errors made during
typesetting, and provides clarifications
to specific procedures of the method.
The method also is being reorganized by
placing the leaching procedure in one
section and the quality assurance in a
separate section to conform with the
format used in SW-846.
A correction is being made in the
calculation for the weight of waste to
charge the Zero-Headspace Extractor
(ZHE). In the final rule published March
29,1990, the method incorrectly stated
that the optimum sample size to charge
into the ZHE should be determined for
wastes containing >0.5% solids. This
calculation results in a charge sample
greater than the capacity of the ZHE.
The Agency today is correcting the
procedure to require a determination on
wastes containing >5% solids. The
sample holding times and errors made
during typesetting are also being
corrected by today's notice.
The Agency received inquiries
indicating that confusion exists
concerning correction Factors and how
they should be applied. Therefore, the
Agency is making a technical correction
in | 8.2.5 of Method 1311, published in
today's notice, by adding a formula for
correcting measured values for
analytical bias. Also, inquiries indicate
that EPA's discussion of the appropriate
GC and GC/MS methods to be used was
improper. The preamble language is
corrected by today's notice to indicate
the appropriate GC and GC/MS
methods to be used.
Method 1311 is also being reorganized
by today's notice by placing the leaching
procedure itself in one section, 7.0. (The
steps of the leaching procedure were
previously presented in sections 7, 8,
and 9 in the March 29,1990 final rule.) In
addition, this notice makes minor
corrections to the quality assurance
section and it is renumbered 8.0. This
reorganization provides consistency
with SW-846.
Appendix II, Method 1311 of the
March 29,1990 final rale is replaced in
its entirety by Method 1311 of this notice
In order to incorporate the corrections,
reorganizations, and clarifications
which are being made by today's notice.
The March 29,1990 final rule provided
an exclusion under 40 CFR 261.4 for
petroleum-contaminated media and
debris that fail the Toxicity
Characteristic. This exclusion applies
only to petroleum-contaminated media
and debris which exhibit the TC for any
one or more of the newly identified
organic constituents, and which are
subject to corrective action under part
280. The regulatory language of this
exclusion in the final rule is revised by
today's notice to correctly reflect this
application.
C Corrections
1. On page 11798, column one, under
"DATES," in the second line of the
compliance dates paragraph, change
"generators: September 25,1990. Small"
to "generators and treatment, storage,
and disposal facilities (TSDFs):
September 25,1990. Small".
2. On page 11804, Table D.2—Toxicity
Characteristics Constitutents and
Regulatory Levels, change the column
heading "Constituent (mg/L)" to
"Constituent".
3. On page 11804, Table II.2—Toxicity
Characteristic Constituents and
Regulatory Levels, line twenty, change
"Heptachlor (and its hydroxide)" to
"Heptachlor (and its epoxide)".
4. On page 11815, column three, Table
C-l—Chronic Toxicity Reference
Levels, lines nineteen and twenty,
change "Heptachlor (and its hydroxide)"
to "Heptachlor (and its epoxide)".
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5, On page 11825, column one, fourth
bullet, first line, change "The data
extracted from RFSs" to "The data
extracted from RFAs".
8. On page 11829, columnn one, the
first full paragraph (lines twenty-four)
through thirty-six) is replaced by the
following: "The Agency agrees that the
GC method (Method 8040) or the GC/MS
method (Method 8270J for phenols and
the GC/Electron Capture Detection
(GC/ECD) for phenoxyacid herbicides
(Method 8150) are more advantageous
for the analysis of these analytes
because the equipment is more readily
available than the HPLC, despite the
associated difficulties. HPLC methods
for phenols and phenoxyacid herbicides
are not included in the third edition of
SW-846 because of a lack of validation
data. The Agency will allow only the
use of the previously mentioned GC and
GC/MS methods (Methods 8040 or 8270)
ot their equivalents for phenols and
Method 8150 for phenoxyacid herbicides
until such time that the Agency proposes
an HPLC method."
7. On page 11831, column two,
paragraph b, seventh line, change "rule
of 40 CFR 262.3{a)(2)(iv) or the" to "rule
of 40 CFR 281.3{a)(2)(iv) or the",
8. On page 11335, column one, first
and second line, change "July 25,1985"
to "July 15,1983".
9, On page 11837, column one, third
complete paragraph, thirteenth line,
change "for TSDFs on February 5,1987
(53 FR" to "for TSDFs on February 5,
1987 (52 FR".
10, On page 11840, column three, first
bullet of second complete paragraph,
first line, change "Solid waste that is a
hazardous waste" to "Used oil that is a
hazardous waste".
11, On page 11844, Table IV-1,—TC
Constituent and Regulatory Levels
Proposed June 13,1988—Continued,
fourth line, change the CASNO for D034
from "76-44-2" to "70-44-8".
12. On page 11844, Table IV-1.—TC
Constituent and Regulatory Levels
Proposed June 13,1988—Continued, line
twenty-one, change to read as follows:
B045. . . . 1,1,1,2-Tetrachloroethane
. , . ,630-20-fl. , . .10.0.
13. On page 11844, column two, Table
IV-2.—Organic Constituents, fourth line,
change the CASNO for D021 from "106-
90-7" to 108-90-7",
14. On page 11844, column three,
Table IV-2.—Organic Constituents-
Continued, first line, change "D031....
Heptachlor (and its hydroxide).... 76-
44-2" to "D031.... Heptachlor (and its
epoxide). . . .78-44-8".
15. On page 11848, Table IV-3—
Toxicity Characteristic Constituents and
Regulatory Levels—Continued, tenth
line, change "Heptachlor (and its
hydroxide)" to "Heptachlor (and its
epoxide)".
16. Also on page 11846, column two,
third line, change "270 of chapter 40." to
"270 of title 40.".
PART 261—[AMENDED]
§261.4 [Corrected]
17. On page 11882, column two, in
§ 261.4 paragraph (b){10), is corrected to
read as follows:
10. Petroleum-contaminated media
and debris that fail the test for the
Toxicity Characteristic of | 281.24
(Hazardous Waste Codes D018 through
D043 only) and are subject to the
corrective action regulations under part
280 of this chapter.
§261.24 [Corrected]
18. Also on page 11882, column three,
in § 281.24 Table 1.—Maximum
Concentration of Contaminants for the
Toxicity Characteristic, lines twenty-
eight and twenty-nine, change
"Heptachlor (and its hydroxide)" to
"Heptachlor (and its epoxide)".
PART 271—{AMENDED]
§ 271.1 [Corrected]
19. On page 11876, in | 271.1(j) Table
1—Regulations Implementing the
Hazardous and Solid Waste
Amendments of 1984, the Federal
Register reference should be "55 FR
11798-11877".
PART 302—{AMENDED]
5302.4 [Corrected]
20. On page 11877, in § 302,4, Table
302.4, List of Hazardous Substances and
Reportable Quantities, in the first
column, make the following corrections;
A. In the ninth line, change
"Heptachlbr (and hydroxide) (D031)" to
"Heptachlor (and epoxide) (D031)."
B. In line twenty-five, change
"Thrichloroethylene (D040)" to
"Trichloroethylene (D040)".
C. In line twenty-six change "2,4,5-
Trichlorethylene (D041)" to "2,4,5-
Trichlorophenol (D041)".
Dated: June 22,1990.
Mary A. Gads,
Acting Assistant Administrator,
In addition to the corrections made
above, part 261 is amended by revising
appendix II to read as follows;
Appendix II—Method 1311 Toxicity
Characteristic Leaching Procedure
(TCLP)
1,0 Scopa and Application
1.1 The TCLP is designed to determine the
mobility of both organic and inorganic
analytes present in liquid, solid, and
multiphasic wastes.
1.2 If a total analysis of the waste
demonstrates that individual analytes are not
present to the waste, or that they are present
but at luch low concentrations (hat the
appropriate regulatory levels could not
possibly be exceeded, the TCLP need not be
run.
1.3 If an analysis of any one of the liquid
fractions of the TCLP extract indicatss that a
regulated compound is present at such high
concentrations that, even after accounting for
dilution from the other fractions of the
extract, the concentration would be equal to
or above the regulatory level for that
compound, then the waste is hazardous and it
is not necessary to analyze the remaining
fractions of the extract.
1.4 If an analysis of extract obtained
using a bottle extractor shows that the
concentration of any regulated volatile
analyte equals or exceeds the regulatory
level for that compound, then the waste is
hazardous and extraction using the ZHE is
not necessary. However, extract from a bottle
extractor cannot be used to demonstrate that
the concentration of volatile compounds is
below the regulatory level.
2.0 Summary of Method
2,1 For liquid wastes (i.e., those
containing less than 0.5% dry solid material),
the waste, after filtration through a 0.9 to 0.8
ftm glass fiber filter, is defined as the TCLP
extract
2.2 For wastes containing greater than or
equal to 0.5% solids, the liquid, if any, is
separated from the solid phase and stored for
later analysis; the particle size of the solid
phase is reduced, if necessary. The solid
phase is extracted with an amount of
extraction fluid equal to 20 times the weight
of the solid phase. The extraction fluid
employed is a function of the alkalinity of the
solid phase of the waste. A special extractor
vessel is used when testing for volatile
analytes (see Table 1 for a list of volatile
compounds). Following extraction, the liquid
extract is separated from the solid phase by
filtration through a 0.0 to 0.8 jim glass fiber
filter.
2.3 If compatible (i.e.. multiple phases will
not form on combination), the initial liquid
phase of the waste is added to the liquid
extract, and these are analyzed together. If
incompatible, the liquids are analyzed
separately and the results are mathematically
combined to yield « volume-weighted
average concentration,
3.0 Interferences
3.1 Potential interferences that may be
encountered during analysis are discussed in
the individual analytical methods,
4.0 Apparatus and Materials
4.1 Agitation apparatus: The agitation
apparatus must be capable of rotating the
extraction vessel in an end-over-end fashion
(see Figure 1) at 30 ±2 rpm. Suitable device*
known to EPA are identified in Table 2.
4.2 Extraction Vessels.
4.2.1 Zero-Headspace Extraction Vessel
{ZHE). This device is for use only when fee
waste is being tested for the mobility of
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26988 Federal Register / Vol. 55. No. 126 / Friday, June 29, 1990 / Rules and Regulations
volatile analytes (i.e., those listed in Table 1).
The ZHE (depicted in Figure 2) allows for
liquid/solid separation within the device, and
effectively precludes headspace. This type of
vessel allows for initial liquid/solid
separation, extraction, and final extract
filtration without opening the vessel (see
section 4.3.1). The vessels shall have an
internal volume of 500-600 mL. and be
equipped to accommodate a 90-110 mm filter.
The devices contain VTTON®1 O-rings which
should be replaced frequently. Suitable ZHE
devices known to EPA are identified in Table
3.
For the ZHE to be acceptable for use, the
piston within the ZHE should be able to be
moved with approximately IS pounds per
square inch (psi) or less. If it takes more
pressure to move the piston, the O-rings in
the device should be replaced. If this does not
solve the problem, the ZHE is unacceptable
for TCLP analyses and the manufacturer
should be contacted.
The ZHE should be checked for leaks after
every extraction. If the device contains a
built-in pressure gauge, pressurize the device
to 50 psi, allow it to stand unattended for 1
hour, and recheck the pressure. If the device
does not have a built-in pressure gauge,
pressurize the device to SO psi, submerge it in
water, and check for the presence of air
bubbles escaping from any of the fittings. If
pressure is lost check all fittings and inspect
and replace O-rings, if necessary. Retest the
device. If leakage problems cannot be solved,
the manufacturer should be contacted.
Some ZHEs use gas pressure to actuate the
ZHE piston, while others use mechanical
pressure (see Table 3). Whereas the volatiles
procedures (see section 7.3) refers to pounds
per square inch (psi), for the mechanically
actuated piston, the pressure applied is
measured in torque-inch-pounds. Refer to the
manufacturer's instructions as to the proper
conversion.
4.Z2 Bottle Extraction Vessel When the
waste is being evaluated using the
nonvolatile extraction, a jar with sufficient
capacity to hold the sample and the
extraction fluid is needed. Headspace is
allowed in this vessel.
The extraction bottles may be constructed
from various materials, depending on the
analytes to be analyzed and the nature of the
waste (see section 4.3.3). It is recommended
that borosilicate glass bottles be used instead
of other types of glass, especially when
inorganics are of concern. Plastic bottles.
other than polytetrafluoroethylene, shall not
be used if organics are to be investigated.
Bottles are available from a number of
laboratory suppliers. When this type of
extraction vessel is used, the filtration device
discussed in section 4.3.2 is used for initial
liquid/solid separation and final extract
filtration.
4.3 Filtration Devices: It is recommended
that all filtrations be performed in a hood.
4.3.1 Zero-Headspace Extractor Vessel
(ZHE): When the waste is evaluated for
volatiles, the zero-headspace extraction
vessel described in section 4.2.1 is used for
nitration. The device shall be capable of
supporting and keeping in place the glass
fiber filter and be able to withstand the
pressure needed to accomplish separation (50
psi).
Note: When it is suspected that the glass
fiber filter has been ruptured, an in-line glass
fiber filter may be used to filter the material
within the ZHE.
4.3.2 Filter Holder: When the waste is
evaluated for other than volatile analytes,
any filter holder capable of supporting a glass
fiber filter and able to withstand the pressure
needed to accomplish separation may be
used. Suitable filter holders range from
simple vacuum units to relatively complex
systems capable of exerting pressures of up
to 50 psi or more. The type of filter holder
used depends on the properties of the
material to be filtered (see section 4.3.3).
These devices shall have a minimum internal
volume of 300 mL and be equipped to
accommodate a minimum filter size of 47 mm
(filter holders having an internal capacity of
1.5 L or greater, and equipped to
accommodate a 142 mm diameter filter, are
recommended). Vacuum filtration can only be
used for wastes with low solids content
(<10%) and for highly granular, liquid-
containing wastes. All other types of wastes
should be filtered using positive pressure
filtration. Suitable filter holders known to
EPA are shown in Table 4.
4.3.3 Materials of Construction:
Extraction vessels and filtration devices shall
be made of inert materials which will not
leach or absorb waste components. Class.
polytetrafluoroethylene (PTFE), or type 316
stainless steel equipment may be used when
evaluating the mobility of both organic and
inorganic components. Devices made of high
density polyethylene (HOPE), polypropylene
(PP), or polyvinyl chloride (PVC) may be used
only when evaluating the mobility of metals.
Borosilicate glass bottles are recommended
for use over other types of glass bottles,
especially when inorganics are analytes of .
concern.
4.4 Filters: Filters shall be made of
borosilicate glass fiber, shall contain no
binder materials, and shall have an effective
pore size of 0.6 to 0.8 jim, or equivalent
Filters known to EPA which meet these
specifications are identified in Table 5. Pre-
filters must not be used. When evaluating the
mobility of metals, filters shall be acid-
washed prior to use by rinsing with IN nitric
acid followed by three consecutive rinses
with deionized distilled water (a minimum of
1 L per rinse is recommended). Class fiber
filter are fragile and should be handled with
care.
4.5 pH Meters: The meter should be
accurate to ± 0.05 units at 25*C,
4.S ZHE Extract Collection Devices:
TEDLAR® • bags or glass, stainless steel or
PTFE gag-tight syringes are used to collect
the initial liquid phase and the final extract of
the waste when using the ZHE device. The
devices listed are recommended for use
under the following conditions:
4.8.1 If a waste contains an aqueous
liquid phase or if a waste does not contain a
significant amount of nonaqueous liquid (i.e.,
1% of total waste), the
syringe or the TEDLAR® bag may be used
for both the intitial solid/liquid separation
and the final extract filtration. However,
analysts should use one or the other, not
both.
4.6.3 If the waste contains no initial liquid
phase (is 100% solid) or has no significant
solid phase (is 100% liquid), either the
TEDLAR® bag or the syringe may be used. If
the syringe is used, discard the first 5 mL of
liquid expressed from the device. The
remaining aliquots are used for analysis.
4.7 ZHE Extraction Fluid Transfer
Devices: Any device capable of transferring
the extraction fluid into the ZHE without
changing the nature of the extraction fluid is
acceptable (e.g. a positive displacement or
peristaltic pump, a gas tight syringe, pressure
filtration unit (see section 4.3.2), or other ZHE
device).
4.8 Laboratory Balance: Any laboratory
balance accurate to within ± 0.01 grams may
be used (all weight measurements are to be
within ± 0.1 grams).
4.9 Beaker or Erlenmeyer flask, glass, 500
mL.
4.10 Watchglass. appropriate diameter to
cover beaker or erlenmeyer flask.
4.11 Magnetic stirrer.
5.0 Reagents
5.1 Reagent grade chemicals shall be used
in all tests. Unless otherwise indicated, it is
intended that all reagents shall conform to
the specifications of the Committee on
Analytical Reagent* of the American
Chemical Society, where such specifications
are available. Other grades may be used.
provided it is first ascertained that the
reagent is of sufficiently high purity to permit
its use without lessening the accuracy of the
determination.
5.2 Reagent water. Reagent water is
defined as water in which an interferant is
not observed at or above the methods
detection limit of the analyte(s) of interest.
For nonvolatile extractions, ASTM Type II
water or equivalent meets the definition of
reagent water. For volatile extractions, it is
recommended that reagent water be
generated by any of the following methods.
Reagent water should be monitored
periodically for impurities.
5.2.1 Reagent water for volatile
extractions may be generated by passing tap
water through a carbon filter bed containing
about 500 grams of activated carbon (Calgon
Corp., Filtrasorb-300 or equivalent).
5.2.2 A water purification system
(Millipore Super-Q or equivalent) may also be
used to generate reagent water for volatile
extractions.
5.2.3 Reagent water for volatile
extractions may also be prepared by boiling
water for 15 minutes. Subsequently, while
maintaining the water temperature at 90 + 5
degrees C bubble a contaminant-free inert
gas (e.g., nitrogen) through the water for 1
hour. While still hot transfer the water to a
narrow mouth screw-cap bottle under zero-
I.+7
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headspace and seal with a Teflon-lined
septum and cap,
5.3 Hydrochloric acid (IN), HCl, made
from ACS reagent grade.
5.4 Nitric acid (IN), HNO,. made from
ACS reagent grade.
5.S Sodium hydroxide (IN), NaOH, made
from ACS reagent grade.
5.8 Glacial acetic acid, CHaCH-OOH,
ACS reagent grade,
5,7 Extraction fluid.
5.7.1 Extraction fluid #1: Add 5.7 mL
glacial CHjCHsOOH to 500 mL of reagent
water (See section 5,2), add 84.3 mL of IN
NaOH, and dilute to a volume of 1 liter,
When correctly prepared, the pH of this fluid
will be 4.93±0.05.
5.7.2 Extraction fluid #2: Dilute 5.7 mL
glacial CHjCHsOOH with reagent water (See
section 5.2) to a volume of 1 liter. When
correctly prepared, the pH of this fluid wfll be
2.88±0.05.
Note: These extraction fluids should be
monitored frequently for impurities. The pH
should be checked prior to use to ensure that
these fluids are made up accurately. If
impurities are found or the pH is not within
the above specifications, the fluid shall be
discarded and fresh extraction fluid prepared.
5.8 Analytical standards shall be
prepared according to the appropriate
analytical method.
6.0 Sample Collection. Preservation, and
Handling
6,1 All samples shall be collected using
an appropriate sampling plan.
6-2 The TCLP may place requirements on
the minimal size of the field sample,
depending upon the physical state or states of
the waste and the analytes of concern. An
aliquot is needed for preliminary evaluation
of which extraction fluid is to be used for the
nonvolatile aaalyte extraction procedure.
Another aliquot may be needed to actually
conduct the nonvolatile extraction (see
section 1.4 concerning the use of this extract
for volatile organics). If volatile organics are
of concern, another aliquot may be needed.
Quality control measures may require
additional aliquots. Further, it is always wise
to collect more samples just in case
something goes wrong with the initial attempt
to conduct the test
6.3 Preservatives shall not be added to
samples before extraction.
6.4 Samples may be refrigerated unless
refrigeration results to irreversible physical
change to the waste. If precipitation occurs,
the entire sample [including precipitate)
should be extracted.
6.S When the waste is to be evaluated for
volatile analytes, care shall be taken to
minimize the loss of volatiles. Samples shall
be collected and stored in a manner intended
to prevent the loss of volatile analytes (e.g..
samples should be collected In Teflon-lined
septum capped vials and stored at 4 "C.
Samples should be opened only immediately
prior to extraction).
6.6 TCLP extracts should be prepared for
analysis and analyzed as *oon as possible
following extraction. Extracts or portions of
extracts for metallic analyte determinations
must be acidified with nitric acid to a pH <2,
unless precipitation occurs (see section 7.2.14
if precipitation occurs). Extracts should be
preserved for other analytes according to the
guidance given in the individual analysis
methods. Extracts or portions of extracts for
organic analyte determinations shall not be
allowed to come into contact with the
atmosphere (i.e., no headspace} to prevent
losses. See section 8.0 (QA requirements) for
acceptable sample and extract holding times.
W Procedure
7.1 Preliminary Evaluations. Perform
preliminary TCLP evaluations on a minimum
100 gram aliquot of waste. This aliquot may
not actually undergo TCLP extraction. These
preliminary evaluations include: (1)
Determination of the percent solids (section
7.1.1): (2) determination of whether the waste
contains insignificant solids and is, therefore,
its own extract after filtration (section 7.1-2);
(3) determination of whether the solid portion
of the waste requires particle size reduction
(section 7.1.3); and (4) determination of which
of the two extraction fluids are to be used for
the nonvolatile TCLP extraction of the waste
(section 7.1.4.).
7.1.1 Preliminary determination of percent
solids: Percent solids is defined as that
fraction of a waste sample (a* a percentage
of the total sample) from which no liquid may
be forced out by an applied pressure, as
described below,
7.1.1.1 If the waste will obviously yield no
liquid when subjected to pressure filtration
(i.e., is 100% solids) proceed to section 7.1 J.
7.1.1.2 If the sample is liquid or
raultiphasic, liquid/solid separation to make
« preliminary determination of percent solids
is required. This involves the filtration device
described in section 4.3.2 and is outlined in
sections 7.1.13 through 7.1.1.9.
7.1.1.3 Pre-weigh the filter and the
container that will receive the filtrate.
7.1.14 Assemble the filter holder and
filter following the manufacturer's
instructions. Place the filter on the support
screen and secure.
7.1.1.5 Weigh out a subsample of the
waste (100 gram minimum) and record the
weight
7.1.1.0 Allow slurries to stand to permit
the solid phase to settle. Wastes that settle
slowly may be centrifuged prior to filtration.
Centrifugation is to be used only as an aid to
* filtration. If used, the liquid should be
decanted and filtered followed by filtration of
the solid portion of the waste through the
same filtration system.
7.1,1.7 Quantitatively transfer the waite
sample to the filter holder (liquid and solid
phases). Spread the waste sample evenly
over the surface of the filter. If filtration of
the waste at 4 "C reduces the amount of
expressed liquid over what would be
expressed at room temperature then allow
the sample to warm up to room temperature
in the device before filtering.
Note: If waste material (>1% of original
sample weight] has obviously adhered to the
container used to transfer the sample to the
filtration apparatus, determine the weight of
this residue and subtract it from the sample
weight determined in section 7.1.1.5 to
determine he weight of the waste sample that
will be filtered
Gradually apply vacuum or gentle pressure
of 1-10 psi, until air or pressurizing gas moves
through the filter. If this point is not reached
under 10 psi, and if no additional liquid has
passed through the filter in any 2 minute
interval, slowly increase the pressure in 10
psi increments to a maximum of 50 psi. After
each incremental increase of 10 psi, if the
pressurizing gas has not moved through the
filter, and if no additional liquid has passed
through the filter in any 2 minute interval,
proceed to the next 10 psi increment When
the pressurizing gas begins to move through
the filter, or when liquid flow has ceased at
SO psi (i.e., filtration does not result in any
additional filtrate within any 2 minute
period), stop the filtration.
Note: Instantaneous application of high
. pressure can degrade the glass fiber filter and
may cause premature plugging.
7.1.1.8 The material in the filter holder is
defined as the solid phase of the waste, and
the filtrate is defined as the liquid phase.
Note: Some wastes, such as oily wastes
and some paint wastes, will obviously
contain some material that appears to be a
liquid. Even after applying vacuum or
pressure filtration, as outlined in section
7.1.1,7, this material may not filter. If this is
the case, the material within the filtration
device is defined as a solid. Do not replace
the original filter with a fresh filter under any
circumstances. Use only one filter.
7.1.1.9 Determine the weight of the liquid
phase by subtracting the weight of the filtrate
container (see section 7.1,1.3) from the total
weight of the filtrate-filled container.
Determine the weight of the solid phase of
the waste sample by subtracting the weight
of the liquid phase from the weight of the
total waste sample, ai determined in section
7.1.1 J or 7.1.1.7.
Record the weight of the liquid and solid
phases. Calculate the percent solids as
follows:
Percent solids
Weight of solid (section 7.1.1 M]
Total weight of waste (section 7.1.1.5 or 7.1.1.7)
X100
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26990 Federal Register / Vol. 55. No. 128 / Friday. June 29, 1990 /Rules and Regulations
7.1.2 If the percent solids determined in
section 7.1.1.9 is equal to or greater than 0.5%,
then proceed either to section 7.1.3 to
determine whether the solid material requires
particle size reduction or to section 7.1.2.1 if it
is noticed that a small amount of the filtrate
is entrained in wetting Of the filter. If the
percent solids determined in section 7.1.1.9 is
less than 0.5%, then proceed to section 7.2.9 if
the nonvolatile TCLP is to be performed and
to section 7.3 with a fresh portion of the
waste if the volatile TCLP is to be performed.
7.1.2.1 Remove the solid phase and filter
from the filtration apparatus.
7.1.2.2 Dry the filter and solid phase at
1QQ± 20°C until two successive weighings
yield the same value within ± 1%. Record the
final weight
Note: Caution should be taken to ensure
that the subject solid will not flash upon
heating. It is recommended that the drying
oven be vented to a hood or other
appropriate device.
7.1.2.3 Calculate the percent dry solids as
follows:
dry solids
(Weight of dry waste-I-filter]—tared weight of filter
Initial weight of waste (section 7.1.1.5 or 7.1.1.7)
'XlOO
7.1.2.4 If the percent dry solids is less
than 0.5%, then proceed to section 7.2.9 if the
nonvolatile TCLP is to be performed, and to
section 7.3 if the volatile TCLP is to be
performed. If the percent dry solids is greater
than or equal to 0.5%, and if the nonvolatile
TCLP is to be performed, return to the
beginning of this section (7.1) and, with a
fresh portion of waste, determine whether
particle size reduction is necessary (section
7.1.3) and determine the appropriate
extraction fluid (section 7.1.4). If only the
volatile TCLP is to be performed, see the note
in section 7.1.4.
7.1.3 Determination of whether the waste
requires particle size reduction (particle size
is reduced during this step): Using the solid
portion of the waste, evaluate the solid for
particle size. Particle size reduction is
required unless the solid has a surface area
pur gram of material equal to or greater than
3.1 cm3, or is smaller than 1 cm in its
narrowest dimension (i.e.. is capable of
passing through a 9.5 mm (0.375 inch)
standard sieve). If the surface area is smaller
or the particle size larger than described
above, prepare the solid portion of the waste
for extraction by crashing, cutting, or grinding
the waste to a surface area or particle size as
described above. If the solids are prepared
for organic volatites extraction, special
precautions must be taken (see section 7.3.6).
Note: Surface area criteria are meant for
filamentous (e.g., paper, cloth, and similar]
waste materials. Actual measurement of
surface area is not required nor is it
recommended. For materials that do not
obviously meet the criteria, sample-specific
methods would need to be developed and
employed to measure the surface area. Such
methodology is currently not available.
7.1,4 Determination of appropriate
extraction fluid: If the solid content of the
waste is greater than or equal to 0.5% and if
the sample will be extracted for nonvolatile
constituents (section 7,2), determine the
appropriate fluid (section 5.7) for the
nonvoiatilea extraction as follows:
Note: TCLP extraction for volatile
constituents uses only extraction fluid #1
(section 5.7.1). Therefore, if TCLP extraction
for nonvolatile! is not required, proceed to
section 7.3.
7.1.4.1 Weigh out a small subsample of
the solid phase of the waste, reduce the solid
(if necessary) to a particle aiie of
approximately 1 mm in diameter or less, and
transfer 5.0 grams of the solid phase of the
waste to a 500 mL beaker or Erlenrneyer
flask.
7.1.4.2 Add 98.5 mL of reagent water to
the beaker, cover with a watchglass, and stir
vigorously for 5 minutes using a magnetic
stirrer. Measure and record the pH. If the pH
is <5.0, use extraction fluid #1. Proceed to
section 7.2.
7,1.4.3 If the pH from section 7.1.4.2 is •
>5.0, add 3.5 mL IN NCI, slurry briefly, cover
with a watchglass, heat to 50°C, and hold at
50*C for 10 minutes.
7,1.4,4 Let the solution cool to room
temperature and record the pH. If the pH is
<5.0, use extraction fluid #1. If the pH is
>5.0, use extraction fluid #2. Proceed to
section 72.
7.1.S If the aliquot of the waste used for
the preliminary evaluation (sections 7.1.1-
7.1.4) was determined to be 100% solid at
section 7.1.1.1, then it can be used for the
section 72 extraction (assuming at least 100
grams remain), and the section 7,3 extraction
(assuming at least 25 grams remain). If the
aliquot was subjected to the procedure in
section 7.1.1.7, then another aliquot shall be
used for the volatile extraction procedure to
section 7.3. The aliquot of the waste
subjected to the procedure in section 7.1.1.7
might be appropriate for use for the section
7.2 extraction if an adequate amount of solid
(as determined by section 7.1.1.9) was
obtained The amount of solid necessary is
dependent upon whether a sufficient amount
of extract will be produced to support the
analyses. If an adequate amount of solid
remain*, proceed to section 7.2.10 of the
nonvolatile TCLP extraction.
7.2 Procedure When Volatiles are not
Involved. A minimum sample size of 100
grams (solid and liquid phases) is
recommended. In some cases, a larger sample
size may be appropriate, depending on the
solids content of the waste sample (percent
solids. See section 7.1.1), whether the initial
liquid phase of the waste will be miscible
with the aqueous extract of the solid, and
whether inorganics, semivolatile organics.
pesticides, and herbicides are all analytes of
concern. Enough solids should be generated
for extraction such that the volume of TCLP
extract will be sufficient to support all of the
analyses required. If the amount of extract
generated by • single TCLP extraction will
not be sufficient to perform all of the
analyses, more than one extraction may be
performed and the extracts from each
combined and aliquoted for analysis.
7.2.1 If the waste will obviously yield no
liquid when subjected to pressure filtration
(i.e., is 100% solid see section 7.1.1), weigh
out a subsample of the waste (100 gram
minimum) and proceed to section 7.2.9.
7.2.2 If the sample is liquid or multiphasic,
liquid/solid separation is required. This
involves the filtration device described in
section 4,3.2 and is outlined in sections 7.2.3
to 7.2.8.
7.2,3 Pre-weigh the container that will
receive the filtrate.
7.2.4 Assemble the filter holder and filter
following the manufacturer's instructions.
Place the filter on the support screen and
secure. Acid-wash the filter if evaluating the
mobility of metals (see section 4,4).
Note: Acid-washed filters may be used for
all nonvolatile extractions even when metals
are not of concern.
7,2.5 Weigh out a subsample of the waste
(100 gram minimum) and record the weight If
the waste contains 0.5% dry solids (sections 7.1.1 or 7.1.2), use
the percent solids information obtained in
section 7.1.1 to determine the optimum
sample size (100 gram minimum) for filtration.
Enough solids should be generated by
filtration to support the analyses to be
performed on the TCLP extract.
7.2.6 Allow slurries to stand to permit the
solid phase to settle. Wastes that settle
slowly may be centrifuged prior to filtration.
lisa centrifugation only as an aid to filtration,
If the waste is centrifuged, the liquid should
be decanted and filtered followed by
filtration of the solid portion of the waste
through the same filtration system.
7.2.7 Quantitatively transfer the waste
sample (liquid and solid phases) to the filter
holder (see section 4.3.2). Spread the waste
sample evenly over the surface of the filter. If
filtration of the waste at 4 *C reduces the
amount of expressed liquid over what would
be expressed at room temperature, then
allow the sample to warm up to room
temperature in the device before filtering.
Note: If waste material (>1% of the original
•ample weight) has obviously adhered to the
container used to transfer the sample to the
filtration apparatus, determine the weight of
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this residue and subtract it from the sample
weight determined in section 7.2.5, to
determine the weight of the waste sample
that will be filtered.
Gradually apply vacuum or gentle pressure
of 1-10 psi, until air or pressurizing gas moves
through the filter. If this point is reached
under 10 psi, and if no additional liquid has
passed through the filter in any 2 minute
interval slowly increase the pressure in 10
psi increments to a maximum of SO psi. After
each incremental Increase of 10 psi, if the
pressurizing gas has not moved through the
filter, and if no additional liquid has passed
through the filter in any 2 minute interval,
proceed to the next 10 psi increment. When
the pressurizing gas begins to move through
the filter, or when the liquid flow has ceased
at 50 psi (i.e., filtration does not result in any
additional filtrate within a 2 minute period),
stop the filtration.
Note: Instantaneous application of high
pressure can degrade the glass fiber filter and
may cause premature plugging.
7.2.8 The material in the filter holder is
defined as the solid phase of the waste, and
the filtrate is defined as the liquid phase.
Weigh the filtrate. The liquid phase may now
be either analyzed (See section 7.2.12) or
stored at 4*C until time of analysis.
Note: Some wastes, such as oily wastes
and some paint wastes, will obviously
contain some material that appears to be a
liquid. Even after applying vacuum or
pressure filtration, as outlined in section 7.2.7,
this material may not filter. If this is the case,
the material within the filtration device Is
defined as a solid and ia carried through the
extraction as a solid. Do not replace the
original filter with a fresh filter under any
circumstances. Use only one filter.
7.2.S If the waste contains <0.5S? dry
solids (see section 7.1.2), proceed to section
7.2.13, If the waste contains >0.5% dry solids
(see section 7.1.1 or 7.1.2J, and if particle size
reduction of the solid was needed in section
7.1.3, proceed to section 7.2.10. If the waste as
received passes a 9.5 mm sieve.
quantitatively transfer the solid material into
the extractor bottle along with the filter used
to separate the initial liquid from the solid
phase, and proceed to section 7.2.11.
7.2.10 Prepare the solid portion of the
waste for extraction by crushing, cutting, or
grinding the waste to a surface area or
particle size as described in section 7.1.3.
When the surface area or particle size has
been appropriately altered, quantitatively
transfer the solid material into an extractor
bottle. Include the filter used to separate the
initial liquid from the solid phase.
Note; Sieving of the waste is not normally
required. Surface area requirements are
meant for filamentous (e.g., paper, cloth) and
similar waste materials. Actual measurement
of surface area is not recommended. If
sieving is necessary, a Teflon-coated sieve
should be used to avoid contamination of the
sample.
7.2.11 Determine the amount of extraction
fluid to add to the extractor vessel as follows:
Weight of extraction fluid =
20x percent solids (section 7.1.1) X weight of waste filtered (section 7i5 or 7.2.7)
100
Slowly add this amount of appropriate
extraction fluid (see section 7.1.4) to the
extractor vessel Close the extractor bottle
tightly (it is recommended that Teflon tape be
used to ensure a tight seal), secure in rotary
agitation device, and rotate at 30 ± 2 rpm for
18 ± 2 boon. Ambient temperature (i.e..
temperature of room in which extraction
takes place) shall be maintained at 23 ± 2*C
during the extraction period.
Note: As agitation continues, pressure may
build within the extractor bottle for some
types of wastes (e.g., limed or calcium
carbonate containing waste may evolve
gases such as carbon dioxide). To relieve
excess pressure, the extractor bottle may be
periodically opened (e.g., after IS minutes, 30
minutes, and 1 hour) and vented into a hood.
7.2.12 Following the 18 ± 2 hour
extraction, separate the material in the
extractor vessel into its component liquid and
solid phases by filtering through m new glass
fiber filter, as outlined in section 7.2.7, For
final filtration of the TCLP extract the glass
fiber filter may be changed, if necessary, to
facilitate filtration. Filters) shall be acid-
washed (see section 4.4} if evaluating the
mobility of metals.
7.2.13 Prepare the TCLP extract as
follows:
7.2.13.1 If the waste contained no initial
liquid phase, the filtered liquid material
obtained from section 7.2.12 is defined as the
TCLP extract. Proceed to section 7.2.14.
7.2.13.2 If compatible (e.g., multiple
phases will not result on combination),
combine the filtered liquid resulting tram
section 7.2.12 with the initial liquid phase of
the waste obtained in section 7,2.7. This
combined liquid is defined as the TCLP
extract. Proceed to section 7.2.14.
7.2,13.3 If the initial liquid phase of the
waste, as obtained from section 7.2.7, is not
or may not be compatible with the filtered
liquid resulting from section 7.2.12. do not
combine these liquids. Analyze these liquids,
collectively defined as the TCLP extract, and
combine the results mathematically, as
described in section 7.2.14.
72.14 Following collection of the TCLP
extract, the pH of the extract should be
recorded. Immediately aliquot and preserve
the extract for analysis. Metals aliquots must
be acidified with nitric acid to pH <2, If
precipitation is observed upon addition of
nitric acid to a small aliquot of the extract
then the remaining portion of the extract for
metals analyses shall not be acidified and the
extract shall be analyzed as soon as possible.
All other aliquota must be stored under
refrigeration (4 *C) until analyzed. The TCLP
extract shall be prepared and analyzed
according to appropriate analytical methods.
TCLP extracts to be analyzed for metals shall
be acid digested except in those instances
where digestion causes loss of metallic
analytes. If an analysis of the undigested
extract shows that the concentration of any
regulated metallic analyte exceeds the
regulatory level, then the waste is hazardous
and digestion of the extract is not necessary.
However, data on undigested extracts alone
cannot be used to demonstrate that the waste
U not hazardous. If the individual phases are
to be analyzed separately, determine the
volume of the individual phases (to ± 0.5%),
conduct the appropriate analyses, and
combine the results mathematically by using
a simple volume-weighted average:
Final Analyte
Concentration
where:
v,+v,
Vt —The volume of the Brut phase (L).
Ci =The concentration of the analyte of
concern in the first phase (mg/L).
Vj=The volume of the second phase (LL
Cj=The concentration of the analyte of
concern in the second phase (mg/L).
7.2.15 Compare the analyte
concentrations in the TCLP extract with the
levels identified in the appropriate
regulations. Refer to section 8.0 for quality
assurance requirements.
7,3 Procedure When Volatiles are
Involved. Use the ZHE device to obtain TCLP
extract for analysis of volatile compounds
only. Extract resulting from the use of the
ZHE shall not be used to evaluate the
mobility of nonvolatile analytes (e.g., metals,
pesticides, etc).
The ZHE device has approximately a 500
ml internal capacity. The £HE can thus
accommodate a maximum of 25 grams of
solid (defined as that fraction of a sample
from which no additional liquid may be
forced out by an applied pressure of 50 psi],
due to the need to add an amount of
extraction fluid equal to 20 times the weight
of the solid phase.
Charge the ZHE with sample only once and
do not open the device until the final extract
(of the solid) has been collected. Repeated
filling of the ZHE to obtain 25 grains of solid
is not permitted.
Do not allow the waste, the initial liquid
phase, or the extract to be exposed to the
atmosphere for any more time than is
absolutely necessary. Any manipulation of
these materials should be done when cold
(4*C) to minimize loss of volatiles.
7.3.1 Pre-weigh the (evacuated) filtrate
collection container (See section 4.6) and set
aside. If using a TEDLAR* bag, express ail
liquid from the ZHE device into the bag.
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26992 Federal Register / Vol. 55. No. 126 / Friday. June 29, 1990 / Rules and Regulations
whether for the initial or final liquid/solid
separation, and take an aliquot from the
liquid in the bag for analysis. The containers
listed in section 4.6 are recommended for use
under the conditions stated in sections 4.8.1-
4.6.3.
7.3.2 Place the ZHE piston within the
body of the ZHE (it may be helpful first to
moisten the piston O-rings slightly with
extraction fluid). Adjust the piston within the
ZHE body to a height that will minimize the
distance the piston will have to move once
the ZHE is charged with sample (based upon
sample size requirements determined from
section 7.3, section 7.1.1 and/or 7.1.2). Secure
the gas inlet/outlet flange (bottom flange)
onto the ZHE body in accordance with the
manufacturer's instructions. Secure the glass
fiber filter between the support screens and
set aside. Set liquid inlet/outlet flange (top
flange) aside.
7.3.3 If the waste is 100% solid (see
section 7.1.1), weigh out a subsample (25
gram maximum) of the waste, record weight,
and proceed to section 7.3.5.
7.3.4 If the waste contains <5% dry solids
(section 7.1.2), the liquid portion of waste,
after filtration, is defined as the TCLP
extract. Filter enough of the sample so that
the amount of filtered liquid will support all
of the volatile analyses required. For wastes
containing >5% dry solids (sections 7.1.1
and/or 7.1.2), use the percent solids
information obtained in section 7.1.1 to
determine the optimum sample size to charge
into the ZHE. The recommended sample size
is as follows:
7.3.4.1 For wastes containing <5% solids
(see Section 7.1.1), weigh out a 500 gram
subsample of waste and record the weight.
7.3.4.2 For wastes containing > 5% solids
(see Section 7.1.1), determine the amount of
waste to charge into the ZHE as follows:
Weight of waste to charge ZHE
25
percent solids (section 7.1.1)
•X100
Weigh out a subsample of the waste of the •
appropriate size and record the weight.
7.3.5 If particle size reduction of the solid
portion of the waste was required in section
7.1.3, proceed to section 7.3.6. If particle size
reduction was not required in section 7.1.3,
proceed to section 7.3.7.
7.3.6 Prepare the waste for extraction by
crushing, cutting, or grinding the solid portion
of the waste to a surface area or particle size
as described in section 7.1.3.1. Wastes and
appropriate reduction equipment should be
refrigerated, if possible, to 4'C prior to
particle size reduction. The means used to
effect particle size reduction must not
generate heat In and of itself. If reduction of
the solid phase of the waste is necessary,
exposure of the waste to the atmosphere
should be avoided to the extent possible.
Note: Sieving of the waste is not
recommended due to the possibility that
volatiles may be lost The use of an
appropriately graduated ruler is
recommended as an acceptable alternative.
Surface area requirements are meant for
filamentous (e.g., paper, cloth) and similar
waste materials. Actual measurement of
surface area is not recommended.
When the surface area or particle size has
been appropriately altered, proceed to
section 7.3.7.
7.3.7 Waste slurries need not be allowed
to stand to permit the solid phase to settle.
Do not centrifuge wastes prior to filtration.
7.3.8 Quantitatively transfer the entire
sample (liquid and solid phases) quickly to
the ZHE. Secure the filter and support
screens onto the top flange of the device and
secure the top flange to the ZHE body in
accordance with the manufacturer';
instructions. Tighten all ZHE fittings and
place the device in the vertical position (gas
inlet/outlet flange on the bottom). Do not
attach the extract collection device to the top
plate.
Note: If waste material (>1% of original
sample weight) has obviously adhered to the
container used to transfer the sample to the
ZHE, determine the weight of this residue
and subtract it from the sample weight
determined in section 7.3.4 to determine the
weight of the waste sample that will be
filtered.
Attach a gas line to the gas inlet/outlet
valve (bottom flange) and, with the liquid
inlet/outlet valve (top flange) open, begin
applying gentle pressure of 1-10 psi (or more
if necessary) to force all headspace slowly
out of the ZHE device into a hood. At the first
appearance of liquid from the liquid inlet/
outlet valve, quickly close the valve and
discontinue pressure. If filtration of the waste
at 4 *C reduces the amount of expressed
liquid over what would be expressed at room
temperature, then allow the sample to warm
up to room temperature in the device before
filtering. If the waste is 100% solid (see
section 7.1.1), slowly increase the pressure to
a maximum of 50 psi to force most of the
headspace out of the device and proceed to
section 7.3.12.
7.3.9 Attach the evacuated pre-weighed
filtrate collection container to the liquid
inlet/outlet valve and open the valve. Begin
applying gentle pressure of 1-10 psi to force
the liquid phase of the sample into the filtrate
collection container. If no additional liquid
has passed through the filter in any 2 minute
interval, slowly increase the pressure in 10
psi increments to a maximum of 50 psi. After
each incremental increase of 10 psi, if no
additional liquid has passed through the filter
in any 2 minute interval, proceed to the next
10 psi increment When liquid flow has
ceased such that continued pressure filtration
at 50 psi does not result in any additional
filtrate within a 2 minute period, stop the
filtration. Close the liquid inlet/outlet valve,
discontinue pressure to the piston, and
disconnect and weigh the filtrate collection
container.
Note: Instantaneous application of high
pressure can degrade the glass fiber filter and
may cause premature plugging.
7.3.10 The material in the ZHE is defined
as the solid phase of the waste and the
filtrate is defined as the liquid phase.
Note: Some wastes, such as oily wastes
and some paint wastes, will obviously
contain some material that appears to be a
liquid. Even after applying pressure filtration,
this material will not filter. If this is the case,
the material within the filtration device is
defined as a solid and is carried through the
TCLP extraction as a solid.
If the original waste contained <0.53S dry
solids (see section 7.1.2), this filtrate is
defined as the TCLP extract and is analyzed
directly. Proceed to section 7.3.15.
7.3.11 The liquid phase may now be either
analyzed immediately (See sections 7.3.13
through 7.3.15) or stored at 4'C under minimal
headspace conditions until time of analysis.
Determine the weight of extraction fluid #1
to add to the ZHE as follows:
Weight of extraction fluid =
20 x percent solids (section 7.1.1) x weight of waste filtered (section 7.3.4 or 7.3.8)
100
.OJ.
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7.3.12 The following sections detail how
to add the appropriate amount of extraction
fluid to the solid material within the ZHE and
agitation of the ZHE vessel. Extraction fluid
#11» used in all cases (See section 5.7).
7.3.12.1 With the ZHE in the vertical
position, attach a line from the extraction
fluid reservoir to the liquid inlet/outlet valve.
The line used shall contain fresh extraction
fluid and should be preflushed with fluid to
eliminate any air pockets in the line. Release
gas pressure on the ZHE piston [from the gas
Inlet/outlet valve), open the liquid inlet/
outlet valve, and begin transferring extraction
fluid (by pumping or similar means) into the
ZHE. Continue pumping extraction fluid into
the ZHE until the appropriate amount of fluid
has been introduced into the device.
7.3.12.2 After the extraction fluid has
been added, immediately close the liquid
inlet/outlet valve and disconnect the
extraction fluid line. Check the ZHE to ensure
that all valves are in their closed positions.
Manually rotate the device in an end-over-
end fashion 2 or 3 times. Reposition the ZHE
in the vertical position with the liquid inlet/
outlet valve on top. Pressurize the ZHE to §-
10 psi (if necessary) and slowly open the
liquid inlet/outlet valve to bleed out any
headspace (into a hood) that may have been
introduced due to the addition of extraction
fluid. This bleeding shall be done quickly and
shall be stopped at the first appearance of
liquid from the valve. Re-pressurize the ZHE
with S-10 psi and check all ZHE fittings to
ensure that they are closed
7.3.12.3 Place the ZHE in the rotary
agitation apparatus (if it is not already there)
and rotate at 30 ± 2 rpm for IB ± 2 hours.
Ambient temperature (i.e., temperature of
room in which extraction occurs) shall be
maintained at 22 ± 3'C during agitation,
7,3.13 Following the 18 ± 2 hour agitation
period, check the pressure behind the ZHE
piston by quickly opening and closing the gas
inlet/outlet valve and noting the escape of
gas. If the pressure has not been maintained
(i.e., no gas release observed), the dtvice is
leaking. Check the ZHE for leaking as
specified in section 4.2.1, and perform the
extraction again with a new sample of waste.
If the pressure within the device has been
maintained, the material in the extractor
vessel is once again separated into its
component liquid and solid phases. If the
waste contained an initial liquid phase, the
liquid may be filtered directly into the same
filtrate collection container (i.e., TEDLAR«
bag) holding the initial liquid phase of the
waste. A separate filtrate collection container
must be used if combining would create
multiple phases, or there is not enough
volume left within the filtrate collection
container. Filter through the glass fiber filter.
using the ZHE device as discussed in section
7,3.9. All extract shall be filtered and
collected if the TEDLAR* bag is used, if the
extract is multiphasic, or if the waste
contained an initial liquid phase (see sections
4.6 and 7.3.1).
Note: An in-line glass fiber filter may be
used to filter the material within the ZHE if it
is suspected that the glass fiber filter has
been ruptured.
7,3.14 If the original waste contained no
initial liquid phase, the filtered liquid
material obtained from section 7.3.13 is
defined as the TCLP extract If the waste
contained an initial liquid phase, the filtered
liquid material obtained from section 7.3.13
and the initial liquid phase (section 7,3.9) are
collectively defined as the TCLP extract
7.3.15 Following collection of the TCLP
extract, immediately prepare the extract for
analysis and store with minimal headspace at
4*C until analyzed. Analyze the TCLP extract
according to the appropriate analytical
methods. If the individual phases are to be
analyzed separately (i.e.. are not miscible).
determine the volume of the individual
phases (to 0.5%), conduct the appropriate
analyses, and combine the results
mathematically by using a simple volume-
weighted average:
Final Analtye
Concentration
CVi)(C.)+fV,)(Cj_
V.+V,
where: • • •
Vi =The volume of the first phases (L).
Ci=The concentration of the analyte of
concern in the first phase (mg/L).
Vj=The volume of the second phase (L).
Cj=The concentration of the analyte of
concern in the second phase (mg/L),
7.3.18 Compare the analyte
concentrations in th« TCLP extract with the
levels identified in the appropriate
regulations. Refer to section 8.0 for quality
assurance requirements.
8.0 Quality Assurance
8,1 A minimum of one blank (using the
same extraction fluid as used for the
samples) must be analyzed for every 20
extractions that have been conducted in an
extraction vessel.
8.2 A matrix spike shall be performed for
each waste type (e.g., wastewater treatment
sludge, contaminated soil etc.) unless the
result exceeds the regulatory level and the
data is being used solely to demonstrate that
the waste property exceeds the regulatory
level. A minimum of one matrix spike must
be analyzed for each analytical batch. The
bias determined from the matrix spike
determination shall be used to correct the
measured values. (See sections 8,2.4 and
8.2.5.) As a minimum, follow the matrix spike
addition guidance provided in each analytical
method.
8,2.1 Matrix spikes are to be added after
filtration of the TCLP extract and before
preservation. Matrix spikes should not be
added prior to TCLP extraction of the sample.
8.2.2 In most cases, matrix spikes should
be added at a concentration equivalent to the
corresponding regulatory level. If the analyte
concentration is less than one half the
regulatory level, the spike concentration may
be as low as one half of the analyte
concentration, but may not be not less than
five times the method detection limit, in order
to avoid differences in matrix effects, the
matrix spikes must be added to the same
nominal volume of TCLP extract as that
which was analyzed for the unspiked sample. •
8.2.3 The purpose of the matrix spike is to
monitor the performance of the analytical
methods used, and to determine whether
matrix interferences exist Use of other
internal calibration methods, modification of
the analytical methods, or use of alternate
analytical methods may be needed to
accurately measure the analyte concentration
of the TCLP extract when the recovery of the
matrix spike is below the expected analytical
method performance.
8.2.4 Matrix spike recoveries are
calculated by the following formula:
SR [% Recovery)=100 [X.-XJ/K
where:
X,=measured value for the spiked sample,
Xu=measured value for the unspiked sample,
and
K = known value of the spike in the sample.
8.2.5 Measured values are corrected for
analytical bias using the following formula:
X«=100(XJ%R)
where:
Xt=corrected value, and
Xu=measured value of the unspiked sample,
8.3 All quality control measures described
in the appropriate analytical methods shall
be followed.
8.4 Samples must undergo TCLP
extraction within the following time periods:
-------
26993 Federal Register / Vol. 55. No. 126 / Friday, June 29, 1990 / Rules and Regulations
SAMPLE MAXIMUM HOLDING TIMES (DAYS)
VOlatilflfF » .Jj™. J..™j..« 1,1 .« . i i««n r t ml '. -.„..!.! MB M. 1. » .......^
"SiMnfunlfllj!^
Momny
M«saK Bxeaet mwcuw
iw^n
From:
Reid
collection
tttTCLP
extraction
14
14
28
180
From:
TCLP
extraction
tot
Prcpara*
live
extraction
NA
7
NA
NA
Front
prepara-
tive
extraction
la
determi-
native
analysis
14
40
28
180
Total
efaosed
time
28
61
58
360
NA-Not applicable.
If sample holding times are exceeded,
the values obtained will be considered
minimal concentrations. Exceeding the
holding time is not acceptable in
establishing that a waste does not
exceed the-regulatory teveL Exceeding
the holding time will not invalidate
characterization if the waste exceeds
> the regulatory level.
TABLE t.—VOLATILE ANAL*TES '•*
TABLE 2.—SUITABLE ROTARY AGITATION
APPARATUS r—Continued
TABLE 4.—SurrABLE FILTER HOLDERS
Compoumf
AtfltOrlfl .„..._..,.. L ,, ; LU,!,.!,,,,,,,,,!!,,!,,!,..,
p.B^tfc^jf ' " '
rtytaiff 1WnM>MfK<4f
1 t^jK^jf^tnytonw „. ,....„„„...„„„,.
Ethyl. acetate ......n, ,„
Flhyl S«17v»n^ -,-,-,-„,„„
Ethyl 'ether — ...„„ m^..,.,
IfiithutiBOf...,......,.,.,,,,, -„-„-, - -,-m, ,,
MathyhHW ehtente _, .„. ,___,_„ __
^^>yf otnyl 'Mtorw
Mattlyl Ki/yurfytk^VTrui „
TTr*SilOrO-1A^trMuofoe»ane-_.
Vmyl rhl/XKfct ..„.,....., „,..,...,.....
CAS No.
67-64-1
71-43-2
- 7t-3S-3
75-15-0
56-23-5
108-80-7
87-66-3
W7-06-2
75-35-4
141-78-6
100-41-4
60-29-7
78-63-1
67-56-1
75-09-2
78-93-3
108-10-1
t27-ti-4
108-88-3
71-55-6
75-69-4
76-13-1
75-01-4
1330-20-7
zaro-headspace extractor vessel sftaK be used in-
stead of tfto t» We extractor.
•Benzenev carbon tetracWoode. cMoroberaerte,
methyl etfiyi ketone, totrachloroefrtylene, tncrilor-
pethytena, and vinyl cftonde are toxicity crwactens-
tic consttluents.
TABLE 2. — SUITABLE ROTARY AGITATION
APPARATUS *
Company
Analytics*
Testing and'
Consuttrtg
Services, Inc.
tocation
Warrington. PA.
(2T5) 343-
4490.
Model No.
4-vessef
(DC20SJ, 8-
vessel
(DC20k12-
vessel
(OC20B).
Company
Assodatad
Design and
Manufactur-
ing Company.
Errwon rnentat
Machine and
Design, Inc..
IRA Machine-
Shop and
Latxxatory.
Lars Land*
Manufactur-
ing.
M;IHpore Corp: —
Locatoo
Alexandria VA,
(703) 549-
5998.
Lynchburg, VA,
(804) 845-
6424.
Samurce. PR,
(809) 752-
" 4004.
WNtmore take.
Ml. (31 3>
449-4116.
Bedford. MA.
(800)225-
3384.
Modal No.
2-vessei (3740-
2).4-vessal
(3740-«).«-
vesse4p74O-
6),6-vessel
(3740-8). 12-
vessel (3740-
12), 24-
vessel (3740-
24).
Odessa) (08-
00-00)4-
vesset (04-
00-00).
8- vessel
(011001).
10-vessel
(01VRE), 5-
vesset
(5VRE).
4.2H60T41.
Her, bottfe
•x5ractoft
(rraooRAHW).
Company
Hocleo-
pore
Corpo-
ration.
Micro
FiHra-
tton
Sys-
tents.
Mitllpws
Corpo-
ration.
Location
Pleaaan-
ton,
CA,
(800)
882-
7711.
Dublin,
CA,
(800)
334-
7132,
828-
6010.
Bedford,
MA,
(800)
225-
3364.
Model/catalogue
425910
410400
302400
311400
YT30142KW
XX10047OO
Saa
142mm,
47
mm.
142mm,
47
mm.
142mm,
47
mm.
1 Any device that routes the extraction vessel in
an end-over-snd fashion at 30 ± Z rpm is accepta-
ble.
TAtLE 3.— SUITABLE ZeRO-HEAospAce
EXTRACTOR VESSELS »
> Any device capable at separating the liquid from
the torn phase of the waste is suitable, providing
that H « cfiemicafly compatible with tfte waste and
the constituent* to be analyzed. Plastic device* (rat
lined above) may be used when only inorganic
«nalyt*» are of concern. The 142 mm size Mter
holder is recommended.
TABLE 5.—SUTTABLE FILTER MEDIA
Company
Analytical
Testing A
Consulting
Services, loc-
Asscoaterf
DesiQnand
Manufactur-
ing Company.
LarsLande
Manufactur-
ing '.
Miltipora
Corporation;
Environmental
Machine and
Design, (nc.
Location
Warnngltx..PA.
(215) 343-
4490.
Atexandria VA,
(703)549-
5999.
WhHmore Lake,
Ml, (313)
449-4116.
Bedford. MA,
(800) 225-
3384.
Lyncnburg, VA,
(804)845-
6424.
Modal No.
C102,
Mechanical
Pressure
Device.
3745-ZHE, Gaa
Pressure
Device.
ZHE-11. Gas
Pressure
Device.
YT30090HW,
Gas Pressure
Device.
VOLA-TOX1,
" Gas Pressure
Device.
Company .
MiUipofv
Corporation.
Niideopore
Corporation.
Whatman
Laboratory
Products.
Inc..
Micro Filtration
Systems.
location
Bedford, MA.
(800)225-
3384.
Pteftssntort,
CA.(415)
483-2530.
C8fton,KJ.
(201J773-
5800.
Outtn,CA,
(800)334-
7132, (415)
828-6010.
Model
AP40
211625
SFF
GF75
POM
Size
(>!">)
0.7
0.7
0.7
0.7
> Any filter that meets me specifications in section
4.4 of me Method is suitable.
BILUIWl COO£ SMO-SO-*
1 Any device mat metis trie specifications listed in
section 4.2.1. of ffw method is acceptable.
*TNs device uses a 110 mm fitter.
-------
OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55, No, 128 / Friday, June 29,1990 / Rules and Regulations 26995
Motor
(30 ± 2 rpm)
Extraction Vessel Holder
Figure 1. Rotary Agitation Apparatus
-------
26398
Federal Register / Vol. 55, No, 126 / Friday, June 29,1980 / Rules and Regulations
Liquid Inlet/Outlet Vaivs
CTP lh C~3
"fep Flanf e—*»P
Support SerseR
Vlton o-rings
iottom Ranga—H-
Pressurized Ga
Intet/OutJst \felv9
Pressure
Gauga
Figure 2. Zerc-Headspace Ixtractoi: (ZHS)
-------
OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55, No. 128 / Friday. June 29,1990 / Rules and Regulations
METHOD 1311
TOXICITY CHARACTERISTIC LEACHATE PROCEDURE
26997
CD
<
Sepc
liquids
solids
0.6 - \
glass
fill
1
irate
. from
, with <0.
0.5 um
fiber
[er
P
Discard
solids
f START]
i
t
Use a
sub-sample of
waste
1
t
55* the % ^
solids in the
wasie?
1
Exa
so
100%
i
mine ^_
ids
CD
Sepc
n e~ liquids
°-5% . soiids
0.6-1
glass
fill
i
Liquid
irate
from
> with
3.8 um
fiber
\er
Solid
Yes
No
Extract with
appropriate fluid
1) Bottle extractor
for non-volatiles
2) ZHE device for
volatiles
Reduce
particle size
to <9.5 mm
B
-------
26998
Federal Register / Vol. 55, No. 126 / Friday, June 29,1990 / Rules and Regulations
METHOD 1311 (CONTINUED)
TOXICITY CHARACTERISTIC LEACHATE PROCEDURE
C
B
J
Separate
extract from
solids with
0.6 - 0.8 um
glass fiber
filter
Store liquid
at 4 C
liquid
compatible
with the
extract?.
Combine
extract with
liquid phase
of waste
Analyze
liquid
(jw>
B
/
h
;e
\.
Measure
liauid an
•^ No (mathe
^k^^___A. T •
/ * combine
result o
ana
amount of
d analyze
matically
result with
f extract
lysis) '
[FR Doc. 90-15048 Filed 8-28-90; 8:45 am]
BILLING COM «SW-SO-C
-------
OSWER DIR. NO. '9541.00-14
Federal Register / Vol. 55, No. 149 / Thursday, August 2, 1990 / Rules and Regulations
31387
release of the Secretary's right to collect
a debt owing to the United States under
this paragraph and/or under paragraph
(a) of this section provided such official
determines:
(i) The loan default was caused by
circumstances beyond Ihe control of the
obligor;
(ii) There are no indications of fraud,
material fault, misrepresentation or bad
faith on the part of the obligor in
obtaining the loan or in connection with
the loan default;
(iii) The obligor cooperated with VA
in exploring all realistic alternatives to
termination of the loan through
foreclosure; and, either
(iv) Review of the obligor's current
financial situation and prospective
earning potential and obligations
indicates there are no realistic prospects
that the obligor could repay all or part of
the anticipated debt within six years of
the liquidation sale while providing Ihe
necessities of life for himself or herself
and his or her family; or,
(v) In consideration for a release of
the Secretary's collection rights the
obligor completes, or VA is enabled to
authorize, an action which reduces the
Government's claim liability sufficiently
to offset the amount of the anticipated
indebtedness which would otherwise be
established pursuant to this paragraph
and likely be collectable by VA after
foreclosure in view of the obligor's
financial situation; such actions would
include termination of the loan by
means of a deed in lieu of foreclosure,
private sale of the property for less than
the Indebtedness with a reduced claim
paid by VA for the balance due the loan
holder or enabling VA to authorize the
holder to elect a more expeditious
foreclosure procedure when such an
election would result in the legal release
of the obligor's liability.
(2) Prior to a liquidation sale, an
official authorized to act for the
Secretary under provisions of section
4342 of this part may approve a partial
release of the Secretary's right to collect
a debt owing to the United States under
this paragraph and/or under paragraph
(a) of this section provided such official
determines:
(i) The loan default was caused by
circumstances beyond the control of the
obligon
(ii} There are no indications of fraud,
material fault, misrepresentation or bad
faith on the part of the obligor in
obtaining the loan or in connection with
the loan default;
(iii) The obligor cooperated with VA
in exploring all realistic alternatives to
termination of the loan through
foreclosure;
(iv) Review of the obligor's current
financial situation and prospective
earning potential.and obligations
indicates there are no realistic prospects
that the obligor could repay all of the
anticipated debt within six years of the
liquidation sale while providing the
necessities of life for himself or herself
and his or her family; and,
(v) The obligor executes a written
agreement acknowledging his or her
liability to VA under this paragraph and
executes a promissory note which
provides for regular amortized monthly
payments of an amount determined by
VA in accordance with paragraph (e)(3)
of this section including interest on the
total amount payable at the rate in
effect for Loan Guaranty liability
accounts at the time of execution, or, the
obligor agrees to other terms of
repayment acceptable to VA including
payment of a lump sum in settlement of
his or her obligation under this
paragraph;
(3) For purposes of this paragraph a
review of an obligor's financial situation
will take into consideration:
(i] The obligor's current and
anticipated family income based on
employment skills and experience;
(ii) The obligor's current short-term
and long-term financial obligations,
including the obligation to repay the
Government which must be afforded
consideration at least equal to his or her
consumer debt obligations;
(iii) A current credit report on the
obligor;
(iv) The obligor's assets and net
worth; and,
(v) The required balance available for
family support used in underwriting VA
guaranteed loans in the area.
The amount of indebtedness
established will be such that the
obligor's financial situation permits
repayment of the debt to the
Government in regular monthly
installments of principal plus interest
over a five year period commencing
within one year after the date the
promissory note is executed, except in
those cases in which a lump sum
settlement appears to be in the best
interest of the Government or in which it
appears the obligor may reasonably
expect significant changes in his or her
financial situation which would permit
higher payments to be made during later
periods of the life of the note.
(4] Determinations made under
paragraphs (e)(2) and (e)(3) of this
section are intended for the benefit of
the Government in reducing the amount
of claim payable by VA and/or avoiding
the establishment of uncollectable debts
owing to the United States. Such
determinations are discretionary on the
part pf VA and shall not constitute a
defense to any legal action to terminate
the loan nor vest any appellate right in
an obligor which would require further
review of the case.
(Authority: 38 U.S.C. 210(c), 18G3(c)(l))
[FR Doc. BO-17938 Filed 8-1-flO; 8:45 am]
BILLJNO CODE 1320-01-M
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Parts 261,264,265,268,271,
and 302
lSWH-FRL-3ei6-F,EPA/OSW-FR-90-FFFJ
RIN 2050-AA78
Hazardous Waste Management
System; Identification and Listing of
Hazardous Waste; Toxlclry
Characteristic Revisions
AGENCY: EPA.
ACTION: Final rule; corrections,
SUMMARY: On March 28,1990, the
Environmental Protection Agency (EPA)
promulgated a rule (55 FR 11798) to
revise the existing toxicity
characteristics (TC), which are used to
identify wastes defined as hazardous
and that are subject to regulation under
subtitle C of the Resource Conservation
and Recovery Act (RCRA) due to their
potential to leach significant
concentrations of specific toxic
constituents. The preamble to these
regulations included implementation
guidance to assist the regulated
community in understanding their
regulatory obligation for managing new
TC wastes. An implementation
timetable included in this section
contained a typographical error that
created confusion among small quantity
generators regarding their notification
responsibilities for TC wastes. This rule
corrects that typographical error and
extends the period of time within which
affected small quantity generators must
comply with the new notification
requirements.
DATIS: This correction is effective
August 2,1990. Generators of 100 to 1000
kg/mo of total hazardous waste who are
newly regulated by the Toxicity
Characteristic must notify the
appropriate EPA Regional office
October 31.1990.
FOft FURTHER INFORMATION CONTACT:
For general information about this
notice, contact the RCRA/Superfund
Hotline at (800) 424-9346 (toll free) or
(202) 382-3000 in the Washington, DC
metropolitan area. For information on
specific aspects of this notice, contact
-------
31388 Federal Register / Vol. 55, No. 149 / Thursday, August 2, 1990 / Rules and Regulations
Steve Cochran, Office of Solid Waste
(OS-332), U.S. Environmental Protection
Agency. 401M Street SW, Washington.
DC 20460. (202) 475-8551.
SUPPLEMENTARY INFORMATION:
Background
Today's rule corrects a typographical
error that appeared in the final rule
revising the toxicity characteristic. At
the time of promulgation, an error was
made in the implementation timeline for
the toxicity characteristic. Tabl^ V-l.—
Implementation Timeline for the
Toxicity Characteristic (55 FR11846)
indicates that generators of 1,000
kilograms per month (kg/mo) or more
and Treatment, Storage, and Disposal
Facilities (TSDFs) who have not
previously notified EPA must submit a
Notification of Regulated Waste
Activity (Form 8700-12, dated 7/90) to
the EPA pursuant to RCRA section 3010
within three months of publication of the
final rule in the Federal Register.
Although language in the preamble to
the rule specifically required all
generators to notify EPA by June 27,
1990 (54 FR 11849), it has come to the
Agency's attention that small quantity
generators (SQGs), those that generate a
total of between 100 kg and 1,000 kg of
hazardous waste in a calendar month,
have relied on the timeline provided in
Table V-l, which suggests no such
notification requirement exists for
SQGs.
The timeline in Table V-l is being
revised to reflect our intent, as specified
in the preamble, that generators of 100
kg/mo or more of hazardous waste and
TSDFs who have not previously notified
must submit a section 3010 notification
(Form 8700-12, dated 7/90) to EPA by
June 27,1990. Since some SQGs may
have missed the original notification
deadline because of reliance on the
information in Table V-l, the Agency is,
in this notice, providing SQGs with an
additional three months to submit ,
notifications. This extension applies to
SQGs only. A copy of the notification
form is included herein.
In addition, the Agency wishes to
clarify the appropriate use of the
toxicity characteristic leaching
procedure (TCLP) and the extraction
procedure (EP) toxicity test by SQGs.
The regulatory language states that any
person that would like to use the TCLP
before the effective date may do so in
order to determine whether the eight
heavy metals and six pesticides covered
by the EP characteristic leach at levels
of regulatory concern. This language
was included because the TCLP is
required for both waste determination
[on September 25.1990, the TC effective
date) and the land disposal restrictions
program. The Agency clarified in an
earlier corrections notice (55 FR 26988,
June 29,1990) that, while it is
appropriate to use just one leach test to
fulfill both requirements, persons that
would like to continue using the EP
leach test until the effective date of the
rule may do so. It should be noted,
however, that the EP test may still be
required as a matter of state law (i.e., in
authorized states), and this regulation
does not affect such state law
requirements.
For SQGs, the compliance date of the
rule is March 29,1991; this is the date on
which SQGs must use the TCLP for
waste characterization purposes relative
to the TC. SQGs who wish to continue
to use the EP toxicity test until that time
may do so. SQGs should be aware that
if they decide to test their waste, they
must continue to use one test or the
other. However, because the EP test is
no longer to be used for any other
purpose, EPA has removed the
procedure from the regulations;
therefore the 1990 version of the' Code of
Federal Regulations (CFR) will no longer
contain the EP toxicity test. The test can
be located in the current CFR (40 CFR
part 261, Appendix II), as well as under
Method 1310 in SW-848. 'Test Methods
for Evaluating Solid Waste (Physical/
Chemical Methods)," Third Edition and
Update I, November 1986, available
from the National Technical Information
Service, 5285 Port Royal Road,
Springfield, Virginia 22161. (703) 487-
4600, document number PB-89-148-076
($67.00 paper, $16.50 microfiche).
Correction
On page 11846, column two, Table V-
1, the bullet under 3 Months should read:
• Generators of 100 kg/mo or more
and TSDFs who have not previously
notified submit 5 3010 Notification
(Form 8700-12, dated 7/90) to the
appropriate EPA regional office.
Note: Generators of 100 kg/mo to 1,000 kg/
mo of hazardous waste have until [insert date
three months from publication] to submit
} 3010 Notification (Form 8700-12. dated 7/
90) to the appropriate EPA Regional office.
Dated: July 26,1990.
Mary A. Cade.
Acting Assistant Administrator.
BILLING CODE «MO-SO-M
-------
OSWER DIE. NO. 9541.00-14
Federal Register / Vol. 55, No. 149 / Thursday, August 2,1990 / Rules and Regulations 31389
Pte«s» prim 02 ehartetaci par inch) in t* unshaded araaa only
one >u. xto-ocii
Ptoun rvfm to ft* Instructions
tor FUing Hottttatkn be*x»
ccxnpMng trm torm. The
infOfmaSon raquMted Here »
raqurad by taw (Sactnn 3010
of»» flwourca Coneamtfon
and Recovery Act). -----
-fc _.-* * Notification of
® EPA Regulated Waste
Activity.
Urtffed States Bivfronmantal Protedton
I. Installation's EPA 10 NSimb*r fMark 'X* la (/)« appropriate box;
Dirtt Racefved
(For Offldal Us* Only)
A. First Notmcatfon
DB. SiAsequent MotfficiUan
(complen item C)
II. Name of Installation ffncfutfo company and specHlc sit* ntmef
III. Location of Installation pnystetl addrtss not P.O. Box or Rout* NumtxrJ
Street
C, tntUllMlen'i EPA ID Numtw
Street (continued)
City or Town
County Code
Stale
HP God*
County Nam*
IV. Installation Mailing Address (St« Instructions)
Street or P.O. Box
City 01 Town
V. Installation Contiet fPenon to fr« eonicctetf regarding wtstt *ctfvftf*s at tfttj
Name fltst)
JobTHle
VI. Installation Contact Address fS«« hvtrvcUom)
Street, P.O. Box, or flout* Numb«r
J_L
City or Town
jtrnf
Mmbwi
rr
Strt*
C. Owner Typ*
ZJPCod*
nrWiiTi Ti
EPA Form 1700-11 (07-90) Pmriou* •dWon la o*»otat«.
-1-
Reproduced from
beat available copy.
Ptiorw Number far»» eorfe amf mintMrJ
A. contact Address
Mjia™
A, Nirn* or instellsnorrs Litgal Owner
-------
31390 Federal Register / Vol. 55, No. 140 / Thursday, August 2,1990 / Rules and Regulations
Phase print or type «wtfi ELITE type (12 characters p*r inch) in the unshaded areas only
ID - For Official Use Only
VIII. Type of Regulated Waste Activity (Marie X In tficr appropriate boxes, flefes to Instructions.)
A. Hazardous Waste Activity
B. Used Oil Fuel Activities
1, Generator (See Instructions)
] a. Greater than lOOOkgAno (2.2OO KM.)
I b. 100 to 1000 ke.'rro (220 - 2.200 tol)
I e. Less than 100 kg/mo (220 Ibs.) j
2. Transporter (Indicate Mode in boxes 1-5 below)]
J i For own waste only |
] b. For commercial purpose*
. Mode o< Transportation
D 1 Air
C] 2. Hal
D 3. Highway Q]
Q 4. Water
Q 5. Other-specify
Q 3 Treater. Storer, Disposer (at SnsUHafon)
Not*: A permit is required for
this ac&vity: see nalzucttons
4. Hazardous Waste Fuel
a. Generator Marketing to Burner
b Other Marketers
c. Surftef •* indicate device(c} —
Type of Combuetion Device
1, Utility Bo8er
2. WusWal BoJer
3. IndusWal Furnace
5 Underground Injectton Conftol
1. Ott-Specifleaaon Used Oil Fuel
Q a, Qeneratbr Marketing to Burner
Q b. Other Mariiarer
O c Burner - indicate devibe(s)-
Type of Comdustkxi Device
D 1, UtJIrtyBoSar
O 2. Industrial Boter
j_j 3. bK&ntrial Furnace
2. Specification Dsad OS Fuef Marteter
D(or On-srt» Burner) Who First Claims
Vie CH Meets the Spedflcation
IX, Description of Regulated Wastet (Uat idctHloml tliceu If n»c*s»vy)
Charictaricttca ol Nonllslwi Hazardoui Wail**, Mark 'X' In tt» boxn corresponding to tha eharactarisfic* ol nontetBd hazardous
wastes your installation handtoc. (See 40 cm Pans 261.20-261.24)
1. Igrtrtabta 2. Corrosive 3. Reactive 4. Toxicfty
(0001) (D002) (0003) Characteristic
(DOQO)
D D D D
(List specific EPA hazardous wast* rtumber(s) lor tw Tcudcaty
CfiaraclerisBc oontamfriaftt(tj) .
B. Listed Hazardous WattM. (See 40 C5R 261.31 - 31 SM insimctlons • you need ID bt mora fort 12 waste oodac.}
C. Othar Wait«*. (Statt or other wastaa requiring *n 1.0. numtor. Sae hstructooi)
f certify under penalty of law fhaf I liav* personally examined end am lamlllar with the Information submitted In this
and all attached documents, and that based on my Inquiry of those Individuals Immediately responsible for
obtaining the Information, I believe that the submitted Information Is true, accurate, and complete. I am aware
that there are significant penalties tor submitting talse Information, Including the possibility of tines and
Imprisonment
Name) and Official Title wpe or punt)
Not* MM compMtit form to Ae appropriate EPA Reofomf or SMe CMfc* (See Section Mot** ftootM lot tttdrtttat.)
EPA Form 8700-12 (07-90) Prrrfout edition It obsolete.
-2-
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OSWER DIE. NO. 9541.00-14
32733
Corrections
Federal Register
Vol. 55, No. 155
Friday, August 10, 1990
This seclion of the FEDERAL REGISTER
contains editorial corrections of previously
published Presidential, Rule, Proposed .
Rule,, and Notice documents. These
corrections are prepared by the Office of
the Federal Register. Agency prepared
corrections are issued as signed
documents and appear in the appropriate
document categories elsewhere in the
issue.
COMMITTEE FOR PURCHASE FROM
THE BLIND AND OTHER SEVERELY
HANIDCAPPED
Procurement List 1390; Additions
Correction
In notice document 90-18159 beginning
on page 31620 in the issue of Friday,
August 3,1890, make the following
correction:
Oh page 31820, in the second column,
the COMMENTS date should read
"September 4,1990,"
BILLING CODE 150S41-O . I
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Parts 261,264, 265,266,271,
and 302
[SWH-FRL-3816-1,EPA/OSW-FR-90"FFF]
RIN2050-AA78
Hazardous Waste Management
System; Identification and Listing of
Hazardous Waste; Toxicity •
Characteristic Revisions
Correction
In rule document 90-18073 beginning
on page 31387 in the Issue of .Thursday. -
August 2,1990, make the following
corrections:
1. On page 31387, in the third column
the docket line was incorrect and should
read as set forth above.
2, On the same page, in the third
column, under DATES, in the last line, ...
"October 31.1990" should read
"November 2,1990".
3. On page 31388, in the third column,
in the note, in the second and third lines,
the bracketed phrase should be removed
and the date "November 2,1990" should
be inserted.
4. On page 31390, in the third column
at the end of the document, the file line
was omitted and should read:
|FR Doc. 90-18073 Filed 8-1-90; 8:45am(
BILLING COM eSM-SO-H
BILLING CODE 1SOS-01-0 ,
DEPARTMENT OF HEALTH AND
HUMAN SERVICES
Social Security Administration
20 CFR Part 416
RIN0960-AC48
Subpart L; Resources and Exclusions;
Exclusion From Resources of Funds
Set Aside for Burial and Burial Spaces
Correction
In rule document 90-18145 beginning
on page 28373 in the issue of
Wednesday, July 11,1990, make the
following corrections:
1, On page 28373, in the second
column, in the first paragraph of the
SUPPLEMENTARY INFORMATION, in the
third line from the end, "to" should read
"for". .:"• . ' ' ' ' '. .
2. On page 28374, in the first column,
in the eighth line from the top, "10"
should read "100",
' 3. On the same page, in the second
column, in the first full paragraph, in the
sixth line, "and" should read "through".
BILLING CODE 1505-Ot-D
DEPARTMENT OF TRANSPORTATION
Coast Guard
33 CFR Parts 175 and 181
[CGD 81-023]
RIN2115-AA58
Equipment Requirements for
Recreational Boats; Personal Flotatio n
Devices
Correction
In rule document 90-17731 beginning
on page 32032 in the issue of Monday,
August 6,1990, make the following
corrections;
§ 175.17 [Corrected)
1. On page 32034, in the second
column, in § 175.17, in the first line of
the introductory text, "Type PFD"
should read "Type V PFD".
PART 181—MANUFACTURER
REQUIREMENTS
2. On the same page, at the bottom of
the same column, the heading for part
161 should read as set forth above.
BIUJMG CODE 1SOMJ1-O
-------
-------
OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55, No. 188 / Thursday, September 27, 1990 /Rules and Regulations 39489
§ 185.2275 N.N-diroethylpiperWInSum
chloride
(a) A tolerance of 8 parts per million
>pm) is established for residues of the
.lanl growth regulator N,N-
dimethylpiperidinium chloride in the
processed fraction raisins, resulting from
application of the plant regulator to the
growing crop groups. Such residues may
be present therein only as a result of the
application of the plant growth regulator
to the growing grapes in accordance
with an experimental use permit that
expires June 30,1991.
(b) Residues in or on raisins not in
excess of B ppm resulting from the use
described in paragraph (a) of this
section remaining after expiration of the
experimental use program will not be
considered actionable if the pesticide is
legally applied during the term of and in
accordance with the provisions of the
emergency use permit and food additive
tolerance.
(c) BASF Corporation shall
immediately notify the Environmental
Protection Agency (EPA) of any findings
from the experimental use that have a
bearing on safety. The firm shall also
keep records of production, distribution.
and performance and on request make
the records available to any authorized
officer or employee of EPA or the Food
and Drug Administration (FDA).
PART 186—{AMENDED]
2. In part 186:
a. The authority citation for part 186
continues to read as follows:
Authority; 21 U.S.C. 343.
b. In § 186.2275, by adding new
paragraph (bj, to read as follows:
§ 188.2275
chloride.
(b) A feed additive regulation is
established permitting the combined
residues of the plant growth regulator
AW-dimethylpiperidinium chloride in or
on the following feeds resulting from
application of the plant growth regulator
to grapes in accordance with an
experimental use program. The
conditions set forth below shall be met.
Feeds
Parts per million
Expiration dale
Gtapa pomace (wet and dry)..
Raian waste _ _
3.0
26.0
6/30/91
6/30/91
(1) Residues in the feed not in excess
of the established tolerancs resulting
from the use described in this paragraph
remaining after expiration of the
experimental program will not be
considered to be actionable if the plant
t>wth regulator is applied during the
•m of and in accordance with the
ovisions of the experimental use
program and feed additive regulation.
(2) The r.cmpany concerned shall '
immediately notify EPA of any findings
from the experimental use dial have a
bearing on safety. The firm shall also
keep records of production, distribution,
and performance, and on request make
the records available to any authorized
officer or employee of EPA or FDA.
(3J These temporary tolerances expire
June 30,1991.
{FR Doc. 90-22905 Filed 9-26-90: 8:45 am)
2ILUHG CODE SSSO-SO-F
40 CFR Parts 261,264, 255,268,271
and 302
IEPA/OSW-FH-80-C20; SWH-FRL-3836-3]
R!N 2G50-AA78
Hazardous Waste Management
System; Identification and Usting of
Hazardous Waste; Toxicity
Characteristic Clarifications
AGENCY: EPA.
ACTION: Final rule; clarification.
'UMMAHY: On March 29,1990 (55 FR
798), the Environmental Protection
Agency (EPAj promulgated the Toxicity
Characteristics (TC) rule to revise the
existing EP toxicity characteristics.
which are used to identify those wastes
defined as hazardous and that are
subject to regulation under subtitle C of
the Resource Conservation and
Recovery Act (RCRA) due to their
potential to leach significant
concentrations of specific toxic
constituents. The preamble to these
regulations included implementation
guidance to assist the regulated
community in understanding their
regulatory obligation for managing new
TC wastes. This notice is intended to
clarify for the regulated community the
following issues: (1) The regulatory
status of surface impoundments
managing newly regulated TC wastes,
(2) ground-water monitoring
requirements for newly regulated land
disposal facilities, (3) section 3010
notification requirements, and (4) permit
modification requirements.
DATES: Effective September 25,1990.
FOR FURTHEfl INFORMATION CONTACT:
For general information about this
notice, contact the RCRA/Superfund
Hotline at (300) 424-9346 (toll free) or
1202) 382-3000 in the Washington, DC
metropolitan area. For information on
specific aspects of this notice, contact
Steve Cbchran, Office of Solid Waste
(GS-332), U.S. Environmental Protection
Agency, 401 M Street SW., Washington,
DC 20460, (202) 475-3551.
SUPPLEMENTARY INFORMATION:
A. Background
On March 29,1990 (55 FR 11798). EPA
promulgated a rule to revise the existing
EP toxicity characteristics, which are
used to identify those wastes which are
hazardous and thus subject to regulation
under subtitle C of RCRA. The ruie
broadened and refined the scope of the
hazardous waste regulatory program
and fulfilled specific statutory mandates
under the Hazardous and Solid Waste
Amendments of 1984.
Today's notice provides clarification
regarding four implementation issues
brought to the Agency's attention since
the publication of the final rule. First
this notice provides clarification
regarding the compliance options for
surface impoundments managing newly
regulated TC wastes. Secondly, this
notice addresses the ground-water
monitoring requirements that owner/
operators of land disposal facilities
managing newly regulated TC wastes
must meet Third, the Agency is
providing additional clarification
regarding § 3010 notification
responsibilities for generators and
owner/operators of treatment, storage.
and/or disposal facilities (TSDFs)
managing newly regulated TC wastes.
Finally, the Agency is clarifying the
permit modification requirements for
hazardous waste management facilities
with newly regulated wastes under the
TC.
-------
39410' -Federal Register / Vol. 55, No. 138 / Thursday, September 27, 1000 / Rules and Regulations
B. Surface Impoundments
The universe of r.ewly regulated
Toxicity Characteristic {TC) wastes
includes (along with other wastes) both
wastewaters and wastes generated from
(he treatment of wastewaters. Some of
lhe.se watewaters and wastewater
treatment wastes are generated or
managed in surface impoundments.
Surface impoundments receiving,
generating, or actively managing newly
regulated TC wastes un or after
September 25,1990 are subject to ail
applicable regulations for surface
impoundments managing RCRA
hazardous wastes. Some of the factors
(hat determine the regulatory status of
these surface impoundments for
permitting purposes and the various
compliance options are discussed
below.
.?. Impoundments ceasing operation
prior to effective date.
Facilities with impoundments ia
which newly regulated TC wastes
currently are generated, stored, and/or
disposed may cease operation of the
units prior to the effective date of the TC
(;.e,, September 25,19SO). If these units
have wastes in place but are not being
used for waste management alter the TC
effective date, these inactive units
would not be subject to regulation under
40 CFR parts 26-1 or 265. However, it
should be noted that inactive units that
are located at facilities otherwise
sjbfect to-subtitle C's interim status or
j-ermitting requirements a;e solid waste-
management units subject to corrective
action requirements under sections
a003(h) and 3004(u) of RCRA. All
facilities, of course, may be subject to
CERCLA cleanup authorities."
In some cases facilities will choose to
ramove some or all of the wastes from
the impoundments. If the removed
wastes are not managed on or after the
effective date of the TC rale, they will
not be subject to subtitle C. However,
any TC waste contained in inactive
impoundments that is removed (i.e.,
actively managed) after the effective
date would be subject to regulation. For
example, if the TC waste was excavated
for treatment and disposal, it would be
regulated as hazardous waste at the
time of excavation and would be
required to be managed at a subtitle C
facility. Sucha removal activity in and
of itself, however, does not subject the
inactive impoundment to subtitle C.
2, Conversion to nan-hazardous waste
impoundment.
A facility with surface impoundments
in which TC wastes have been
generated and/or managed may choose
!:) redesign or reconfigure the existing
wasiawaler treatment system prior to
the effective date such that only non-
hazardous wastes are generated or
managed in some or all units of the
treatment train on or after the effective
(late of the rule. If all TC sludges ara
removed from the surface
impoundments prior to the effective date
of the rale, the units may conti.iue to be
used and will not be subject to subtitle
C of RCRA (provided no other
hazardous wastes are generated,
managed, or disposed in the unit).
Undar another scenario, there may be
surface impoundments that (1) contain
TC wastes deposited prior to the
effective date, and (2) receive or
generals only non-hazardous wastes by
the effective date as a result of system
reconfiguration or modification. The
regulatory status of such units depends
on how the residual TC waste is
managed after the effective date of the
ruls. If (1) the TC wastes remain in the
surface impoundment en or after the
effective date of the rule, and (2) the unit
does not receive or generate any other
hazardous wastes on or after the
effective date, and (3) the impoundment
is the final disposal site for the wastes,
then the unit is not subject to subtitle C,
Note that EPA doea not consider ona
time removal of waste from a unit on or
;»ftar the TC effective date, in and of
itself, to make the unit a storage unit
and thus subject to subtitle C. The
Agency does not view one time removal
of waste as part of a closure as changing
the status of the unit, as long as there
has not been ongoing management of
the waste in the impoundment. Removal
of waste in the context of a closure
provides human health and
environmental benefits since it
eliminates potential sources of ground
water pollution. This approach is also
consistent with current operational
procedures for landfills under identical
circumstances with respect to newly
regulated TC wastes.
3. Active hazardous waste
management impoundments.
Facilities with units in which TC
wastes are managed on or after the
effective date of the rule may continue
t.j use these units to manage TC wastes
if all applicable subtitle C requirements
are satisfied. These facilities are
required to obtain interim status and
apply for a permit (or submit a change in
interim status or a permit modification,
if appropriate) in accordance with the
appropriate compliance dates. The units
will be subject to the Applicable
requirements of 40 CFR parts 2S4 and
2R5 as of the effective date of the TC.
As described in section 2 above,
fjciiity cwrsers or operators may elect to
manage only non-hazardous wastes in
surface impoundments so that the unit
will not be subject to subtitle C.
! knvever, there ars a number of
scenarios where these impoundments
eomd became regulated. For example, if
any TC waste remains in the surface
impoundment on the TC's effective date
and the impoundment is not ths final
disposal site for the wastes, then the
impoundment is considered to be
actively managing (e.g., storing)
hazardous wastes and therefore ia
subject to the Subtitle C requirements
upon the effective date of the rale. If a
facility plans to remove on a periodic
basis all or some of the TC waste from
the unit on cr after the effective date of
the TC rale, the unit would he subject to
subtitle C (including permitting, facility-
wide corrective action, financial
responsibility) on the effective date of
the rale,
A second example would be where
the non-hazardous wastewater influent
to a unit causes a TC hazardous sludge
(disposed prior to the effective date) to
be scoured from the unit so that the
effluent from the unit exhibits the TC on
cir after the effective date. In that case,
the unit generating this TC wastewater
and any surface impoundment receiving
that hazardous effluent would be subje'
to the subtitle C management standards
and would need to be under interim
status or obtain a permit,
A third example is where a TC waste
is generated within the unit from non-
hazardous wastewater on or after the
TC effective date. This could occur
where the hazardous constituents in the
wastawater become concentrated, or if a
new TC sludge is formed by settling. In
these examples, once the TC waste is
generated and stored or disposed of in
the unit, the unit is subject to subtitle C.
C. Ground-Water Monitoring
Requirements
The Agency is aware of confusion
regarding the timing of the subtitle C
ground-water monitoring requirements
as they apply to land disposal units or
fjcililiei-that ars newly regulated as a
result of the final TC, Subpart F of 40
CFR part 285 describes the ground-water
monitoring requirements for interim
status land disposal facilities managing
hazardous wastes. The applicability
section of subpart F (see § 235.90) is not
clear as to whether such units or
facilities newly regulated under the
toxieity characteristic must comply with
the ground-water monitoring
requirements on the effective date of ih
-------
DIE. NO. 9541.00-14
Federal Register / Vol. 55, No. 188 / Thursday, September 27, 1990 / Rules and Regulations 39411
TC [i.e.. September 25.1990] or one year
later on September 25,1991.
la 1980, the Agency promulgated the
nterim status program, including the
part 265, sabpart F ground water
monitoring requirements. The Agency
allowed affected facilities an additional
year from the effective date of the
regulations for compliance with She
groundwater monitoring requirements as
codified at § 255.90(a): "within one year
after the effective date of these
regulations, the owner or operator * * *
must implement a ground water
monitoring program capable of
determining the facility's impact on the
quality of ground water. * * *"EPA
provided this delayed compliance
schedule for groundwater monitoring
requirements in order to allow facilities
sufficient time to properly plan and
install groundwater monitoring systems
(45 FR 33161, May 19,1980). EPA
believes that the rationale for allowing
an additional year after the effective
date of the initial regulations for full
implementation of groundwater
monitoring requirements is also
applicable to newly regulated facilities,
EPA believes that the 6 month effective
date provided for RCRA regulations is
insufficient to allow for proper site
characterization and well placement.
"''us, EPA interprets § 265.90(a) to
\. vide a ons year timeframe from the
t .ctive date of new listings or
.aracteristics roles for the
implementation of a complete
groundwater monitoring program at
newly regulated units or facilities. The
Agency intends to codify this in a future
rulemaking by modifying the •
appropriate sections of the regulations.
Consistent with EPA's implementation
of the loss of interim status requirement
for land disposal facilities in 1935 (50 FR
38946, September 25,1985), land
disposal facilities newly subject to the
ground-water monitoring requirements '
must complete site characterization and
design and installation of groundwater
monitoring systems capable of
determining the facility's impact on
ground water quality by September 25, :
1991. Therefore, owner/operators who
have not already done so should
immediately commence characterizing
their facility's hydrogsology and
designing and installing their
groundwater monitoring systems to meet
this deadline. As in 1985, EPA intends to
rigorously enforce both the part 265
subpart F requirements and the loss of
interim status requirements.
To certify compliance with these : •
quirements, facilities must submit a
lund-water monitoring system
rtifieation, certifications of financial
responsibility and part B permit
applications by September 25,1991.
D. Section 3010 Notifications
In the preamble to the TC final rule
(55 FR 11849), the Agency indicated that,
pursuant to RCRA section 3010, the
Administrator may require all persons
who handle hazardous wastes to notify
the Agency of their hazardous waste
management activity within 90 days
after the wastes are identified as
hazardous. For the TC rule, the
notification date was June 27,1990.
However, the Agency waived
notification for those facilities that
already have notified EPA of their
hazardous waste activity under section
3010 of RCRA and have obtained an
EPA identification number.
Based on inquiries received by
various EPA offices concerning the
notification requirements, and a review
of the preamble language, the Agency
understands that a significant number of
regulated facilities may have been
confused by certain language in the
notification section of the TC preamble.
As a result, the Agency is today
clarifying the notification requirements
for generators and TSDFs, and is also
providing additional time for such
notification.
Notification requirements for large
quantity generators (those that generate
more than 1,000 kg per month of total
hazardous waste) and TSDFs, as
specified in the TC final rule, required
notification by Jane 27,1990 unless they
had already notified EPA of hazardous
waste activity and obtained an EPA
identification number. Based on
inquiries received by various EPA
offices, it is apparent that many persons
did not understand that in order to have
the notification requirement waived, a
generator must have met two criteria: (1)
They must have previously notified the
Agency of hazardous waste
management activity, and (2) they must
have received an EPA identification
number (see § 262,12). Some persons
interpreted this section to mean that any
previous notification under any Agency
program (rather than under the RCRA
program) was sufficient. Others took the
interpretation that if they had an EPA
identification number for any Agency
program, that was sufficient to take
advantage of the notification waiver.
Both interpretations are incorrect. Due
to this apparent confusion, the Agency
is today allowing large quantity
generators and TSDFs newly regulated
by-the TC additional time to notify the
appropriate EPA Regional Office of their
hazardous waste activity. Large quantity-
generators and TSDFs have until
October 29,1990 to notify the Agency of
their hazardous waste management
activity. This is done by completing a
section 3010 notification form (EPA
Form 8700-12, dated 7/SO; see 55 FR
31389, August 2,1S90 for a copy of the
form) and sending it to the appropriate
EPA Regional Office. It is important to
note that this extension applies only to
the notification requirement, and does
not provide an extension for any other
requirement under TC rale, including the
date by which an EPA ED number must
be obtained.
For newly regulated TSDFs. RCRA
specifies that in order for a newly
regulated TSDF to be granted interim
status, three conditions must be met: (1)
The facility/unit must be in existence en
the effective date of the rule; (2) the
facility must submit a section 3010
notification (if required by the Agency)
within the required time frame (for the
TC the date was June 27,1990); and (3)
the facility must submit a part A by
September 25,1990. As indicated above,
the Agency is today extending the time
by which TSDFs must notify the Agency
in order to be eligible for interim status
to October 29,1990. This is done by
completing a section 3010 notification
form (EPA Form 8700-12 as described
above) and sending it to the appropriate
EPA Regional Office. This extension of
the section 3010 notification date does
not affect the date part A applications
are due-, which remains September 25,
1990. It also does not affect the
compliance date for any other
requirement other than the section 3010
notification.
Notification requirements for small
quantity generators (generators of
between 100 and 1,000 kg of total
hazardous waste per month) newly
regulated as a result of the TC were
already clarified in a TC correction
notice published in the Federal Register
on August 2,1990 (see page 31387; see
also editorial correction notice dated
August 10,1990, page 32733). Small
quantity generators that are newly
regulated by the TC are required to
notify their respective EPA Regional
Office by November 2,1990 of their
hazardous waste management activity.
This is done by completing a section
3010 notification form (EPA Form
8700-12 as described above) and sending
it to the appropriate EPA Regional
Office.
E. Permit Modifications
The I oxieity Characteristic (TC) role
is expected to cause many permitted
facilities to seek modifications to their
permits. The TC is the first major
expansion of regulated wastes under
part 261 sines the new permit
modification rule was-promulgated on
September 28,1988 (53 FR 37912). In the
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3S412 Federal Register / Vol. 55, No. 188 / Thursday, September 27, 1990 / Rules and Regulations
preamble to the TC rule, the Agency
generally described the implementation
of the permit modification procedures
for newly regulated wastes (see 55 FR
11843, March 29,1930). However, the
Agency has received questions asking
for clarification of certain provisions of
the new modification rule.
Under the new permit modification
procedures, permitted facilities that
manage TC wastes must submit Class 1
permit modifications to the appropriate
EPA Regional OfSce by the TC rule
effective date, September 25,1S90, if
they are to continue managing the newly
regulated TC wastes in units that
require a permit (see I 270.42[g}). A
number of people have expressed
confusion about the type and extent of
information permitted facilities must
submit with these Class 1 permit
modifications. This confusion stems
from the fact that § 270.42(g) does not
clearly define what information must be
contained in the Class 1 submission. The
rule language for Class 1 modifications
in § 270.42{a) suggests that facilities
must also submit the detailed part B
application information specified in
§§ 270.13 through 270.21, 270.62 and
270,63. However, this is not the intent of
the requirements under | 270,42(g)
because there would be insufficient time
for facilities to develop the necessary
data by the effective date. Furthermore,
the more extensive information
requirements under § 2~0.42{a) are
intended for facility changes initiated by
an owner/operator, not for changes
undsr | 270.42(g) resulting from new
regulatory requirements imposed by the
Agency.
The new waste provision of
I 270.42(g) is analogous to the
procedures required for interim status
facilities or newly regulated facilities,
where a facility can continue to manage
newly regulated wastes by submitting
basic information about the affectsd
waste streams and units and then
complying with the part 285
management standards for any newly
regulated units until final permit
conditions arc developed. Therefore, the
Class 1 submission would comprise a
revised part A form clearly indicating all
activities that are newly regulated as a
result of the TC rale, and any other
description that will clarify which units
at the facility are managing the new
wastes. This Class 1 permit modification
serves as a notification to the Agency
and the public of the newly regulated
activities.
A subsequent Class 2 or 3 permit
modification (if necessary] must be
submitted 180 days after the TC
effective date (i.e., March 24,1G91), and
it is at this time that the detailed part B
information must be submitted. It is
expected that a Class 2 for 3 permit
change will be necessary for virtually
every facility that has wastestreama
which sre newly regulated as hazardous
under the TC, to situations where a
wastestieam was already regulated as
hazardous under the permit but now has
additional waste codes associated with
it due to the TC rule, only a Class 1
modification may be required.
Bated: Ssptesaber 24,1930.
Hoary U Longest II,
Acting, Assistant Administrator, Office of
Solid Waste and Emergency Response.
[FR Doc. SG-223S1 Filed 9-2S-SO; 8;45 amj
BILLING CODS 6SSO-50-M
FEDERAL EMERGENCY
MANAGEMENT AGENCY
44 CFR Part 2
Information Collection Requirements
Approved by tiia C'fica of
Management and Budget
AGENCY: Federal Emergency
Management Agency (FEMA).
ACTION; Final rule.
SUMMARY: This amendment updates and
displays the Office of Management and
Budget (OMB) control numbers assigned
by OMB for collections of information
contained in, or authorized by, FEMA
regulations. The update is necessary to
make corrections to parts and sections
and control numbers listed incorrectly,
add new requirements, and delete
requirements no longer needed or
controlled.
EFFECTIVE DATE: September 27,19t30.
FOR FURTHER INFORMATION CONTACT:
Linda S. Borror, (202) 648-2625.
SUPPLEMENTARY iNFORMATlCH: The
Paperwork Reduction Act of 1930 (44
U.S.C. 3501 et seq.) seeks, to part, to
minimize the Federal paperwork burden.
The Act requires that agencies obtain
OMB review and clearance of certain
reporting and recordkeeping
requirements/collections of information
and give public notice of such clearance
numbers. This rule amends 44 CFR part
2, subpart C to update end display the
control numbers assigned by OMB to
FSMA's collections of information
which ars contained in, or asithorizsd
by, FEMA regulations.
Because this is a nonsubstantive
enaondmsr.t dealing with procedural
matters, it is not subject to the
provisions of the Administrative
Procedure Act (5 U.S.C. 551-553 et seq.}
requiring advance notice and comment.
FEMA has determined that this
regulation will not impose unnecessary
burdens on the economy or on
individuals, and therefore, is not
significant for the purposes of Executive
Order 12291; that a regulatory analysis
is not required; that environmental
impact documents under the National
Environmental Policy Act of 1909 ars not
required since the action is
administrative and categorically exempt
from 44 CFR part 1C; and that the
updated cumulative list of assigned
OMB control numbers is not subject to
further review and clearance by CMS
under the Paperwork Reduction Act of
1980.
List of Subjects in 44 CFR Part 2
Authority delegations (government
agencies). Organization and functions
(government agencies), Reporting and
recordkeeping requirements.
Accordingly, title 44, chapter L
subchapter A of the Code of Federal
Regulations, part 2, subpart C is
amended as follows;
PART 2—{AMENDED]
Subpart C—{Amended]
1. The authority citation for part 2,
subpart C continues to read as follow?
Authority: 4i FR 36503, Sept IB, 1984; a
amended al 50 FR 40000, Oct 1,1985; 51 F*
34804, Sept 30,1988
§ 2.81 CMS control numbers aso.gr.ad to
Information collections.
2. Section 2.81 is amended by revising
the cumulative list of parts and sections
in 44 CFR which identifies or describes
FEMA'i information collection
requirements that have been assigned
OMB control numbers as follows:
44 CFR part or section where iden-
tified or described:
7 Sufcjwirt E...™.... .,.„.,,.„„...-,.,..„ ,
11.35,,.. ,.,,..._.„.. „.,,„ .,_.„
11 sa ,
1 1 Subpart D. _
59.22(a) . .. ...»
S9.22!t>)(2)________.
60.3, 60.4, 60.5_ „____
61, 61 App. A(1), 8! App. A(2)
52 Subpait C, 62 App. A, 62 App
8 .._ „ „
B3Suhfijar-n ....„ . ______ __ _„
64_3(e> __„, ____,
65 „ _
68, 67
70 .
71 .- „....,, :,„:-«-,., ,.,i,,.-, ,,...- ._._
75 SlibpSft ^ i- ,_,L::::: — -~
80, 8t, 63 „
151 SubcartB.. .
Cwrert OMB
Control No.
3067-0177
3007-01 22
?OP7-ni?j»
3067-0167
3067-0020
3087-OC18
3Q67-CQ22
30S7-C022
3067-0160
3067-0198
3C€7-0C2Q>
3C.67-0147
3067-0143
3067-014"
3067-01
i 3067-0:
3067-OC
! scrr-cu.
-------
OSWER DIR. NO. 9541.00-14
40834 Federal Register / Vol. S5, No. 194 / Friday, October 5, 1080 / Rules and p-ejjf *j
request for revision to any state
implementation plan. Each request for
revision to the state implementation
plan shall be considered separately in
light of specific technical, economic, and
environmental factors and in relation to
relevant statutory and regulatory
requirements.
List of Subjects in 40 CFR Part 52
Air pollution control, Particulale
matter.
Dated: September 25,1990.
Kerrigan Clough,
Acting Regional Administrator.
40 CFR Part 52, Subpart QQ is
amended as follows:
PART 52-t AMENDED]
1. The authority citation for Part 52
continues to read as follows:
Authority: 42 U.S.C. 740I-7M2,
Subpart QQ—South Dakota
2. Add a new § 52,218 to read as
follows:
152.2182 PM,o Committal SIP.
On July 121988, the State submitted a
Committal SIP for the Rapid City Group
II PMie area, as required by the PM«
implementation policy. The SIP commits
the State to continue to monitor for PMm
and to submit a full SIP if a violation of
the PMio National Ambient Air Quality
Standards is detected. It also commits
the State to make several revisions
related to PM,o to the existing SIP.
[FR Doc. 90-23Z84 Filed 10-4-90; 8:45 am]
muma COOT SGW-SO-M
40 CFR Part 81
[FRL-3850-7]
National Emission Standards for
Radon Emissions from
Phosphogypsum Stacks
AGENCY: Environmental Protection
Agency (EPA).
ACTION: Notice of compliance waiver.
SUMMARY: Today's action announces the
continuation of a limited compliance
waiver, pending reconsideration and
rulemaking, of subpart R of 40 CFR part
61 ("Subpart R"), National Emission
Standards for Radon Emissions from
Phosphogypsum Stacks (54 FR 51054
December IS, 1989). EPA la issuing this
compliance waiver pursuant to its
authority under Clean Air Act
112(c)(l)(B)(ii) and 40 CFR 60.10-00.11.
Today's limited compliance waiver,
which permits the distribution and use
of phosphogypsum for agricultural
purposes, temporarily continues the
existing limited compliance waiver,
originally issued by the Administrator
on April 10,1990 (55 FR 13480 (April 10,
1990)), pending final action on the
ongoing rulemaking proceedings, but in
no event beyond June 1,1S91.
EFFECTIVE DATE Effective October 1,
1990, the requirement of subpart R of 40
CFR part 81 that phosphogypsum be
disposed in stacks or mines is
temporarily waived to permit the
distribution and use of phosphogypsum
for agricultural purposes, pending final
action on the ongoing rulemaking
proceedings (55 FR 13480 April 10,
1990)), but in no event beyond June 1,
1991.
FOB FURTHER INFORMATION CONTACT:
Craig Conklin, Environmental Standards
Branch, Criteria and Standards Division
(ANR-460), Office of Radiation
Programs, Environmental Protection
Agency, Washington, DC 20460, (202J
475-9610.
SUPPLEMENTARY INFORMATION:
A. Background
On October 31,1989, EPA
promulgated a final rule controlling
radionuclide air emissions from several
source categories, including
phosphogypsum stacks (to be codified at
40 CFR part 61. subpart R ("Subpart
R"J). 54 FR B1653 (December 15,1980).
The standard requires, in part, the
disposal of phosphogypsum in stacks or
mines, thereby precluding alternative
uses of the material. EPA received
petitions from several parties, including
The Fertilizer Institute ("TFI"),
Consolidated Minerals, Inc. ("CMI"),
and U.S. Gypsum Co. ("USG") that EPA
reconsider this portion of the
phosphogypsum NESHAP. On April 10,
1990, EPA published in Ihe Federal
Register a notice of limited
reconsideration of subpart R, a
rulemaking proposal which included
several alternatives to modify or
maintain subpart R, and a limited
compliance waiver which waived the
requirements of subpart R for those
owners or operators engaged in the
distribution or use of phosphogypsum
for agricultural purposes during the
current growing season (not to extend
beyond October 1,1990). 55 FR 13480.
The waiver was issued upon the finding
of the Administrator that such activity
presents no imminent endangerment to
public health, that the immediate
prohibition of such use would cause
great injury to many small farmers who
rely upon phosphogypsum, and that It
would be burdensome and
impracticable to issue limited waivers to
each affected owner or operator. In
addition, it was issued in light of the
scope of the simultaneously granted
limited reconsideration of subpart R and
in recognition that such waiver was
necessary to allow time for
implementation of alternative means of
soil conditioning.
EPA has received well over 100
comments on the proposed rule. EPA is
presently evaluating each comment and
plans to issue a final rule shortly.
Today's action by EPA does not, and
should by no means be construed to,
indicate any Agency predisposition on
the pending rulemaking,
B. Issuance of Compliance Waiver
For the same reasons announced in its
original limited compliance waiver, EPA
today continues in place the limited
compliance waiver for subpart R, as
originally issued on April 10,1990, 55 FR
13480, pending final action on the
rulemaking proceeding also commenced
on April 10,1990, but in no event beyond
June 1,1991. Authority for this waiver
exists in Clean Air Act section
112(C)(l)(B](ii) and 40 CFR 61.10-61.11.
EPA is accumulating and analyzing the
information necessary to issue a final
decision on the rulemaking proceeding,
and expects to take final action shortly.
Pending that final decision, the waiver
bars enforcement against the use and
distribution of phosphogypsum for
agricultural purposes during this period.
Daled: September 28,1990.
William K. Railly,
Administrator.
[FR Doc. 90-23541 Filed WM-flO; 8:45 am]
BILINO CODE IMO-SO-M
40 CFR Part 261
[EPA/OS W-FR-SO-FtF; SWM-FBL-383&-il
RIN 2050-AA78
Hazardous Waste Management
System; identification and Listing of
Hazardous Waste; Toxlcity
Characteristic; Hydrocarbon Recovery
Operations
AGENCY: EPA.
ACTION: Interim final rule with request
for comments.
SUMMARY: On March 29,1990. the
Environmental Protection Agency (EPA)
promulgated revisions to the toxicity
characteristic, one of the testa used to
determine whether particular waste* are
regulated as hazardous under subtitle C
of the Resource Conservation and
Recovery Act (RCRAJ. New information
acquired by the Agency since the
promulgation of the Toxicity
i.O IT
-------
Federal Register / Vol. 55. No. 194 / Friday. October 5, 19BO / Rules and Regulations 40835
Characteristic (TC) rule indicates that
immediate application of the TC could
prevent continued operation of
hydrocarbon recovery and remediation
activities currently being conducted at a
number of petroleum refineries and
rnaiketing terminals or bulk plants
handling crude pertroleum and
immediate products of petroleum
refining. The hydrocarbon recovery and
remediation activities of concern are
those that recover free-floating
hydrocarbons from the contaminated
acquifer, and include es part of the
recovery, reinjection of contaminated
ground water via undergound injection
wells or reinfiltration via an infiltration
gallery into the same aquifer from which
it was withdrawn.
The Agency believes that cessation of
these activities may pose a substantially
greater risk to human health and the
environment than their continued
operation under the existing regulatory
authorities. As a result of this new
information, the Agency is today
promulgating an interim final rule which
extends ths compliance date of the TC
rule for petroleum refining facilities,
marketing terminals and bulk plants
engaged in this specific recovery and
remediation operation for 120 days. The
period of the extension being
promulgated today will allow the
Agency to solicit public comment on
issues related to these facilities, and to
consider all available, pertinent
information, and to develop the best
solution to protect human health and the
environment,
EFFECTIVE DATE September 25,1990.
ADDRESSES: The public docket for this
rulemaking is located at Room M2427,
U.S. Environmental Protection Agency,
401 M Street. SW,, Washington, DC
20460. The docket number assigned to
this notice is F-90-PRAS-FFFFF.
Persons who wish to comment on the
notice should place the docket number
on their comments and provide an
original and two copies.
The EPA RCRA docket is open from 8
a,m. to 4 p.m., Monday through Friday,
excluding Federal holidays. To review
docket materials, the public must make
an appointment by calling (202) 475-
9372. A maximum of SO pages may be
copied from any regulatory docket at no
cost Additional copies cost $0.20 per
page.
FOR FURTHER INFORMATION CONTACT:
For general information about this
notice, contact the RCRA/Superfund
Hotline at (800) 424-8346 toll free, or
(202) 382-3000 in Washington, DC
mstropolitan area. For information on
specific aspects of this notice, contact
David Topping of the Waste
Identification Branch, Office of Solid
Waste (OS-333), U.S. Environmental
Protection Agency, 401 M. Street SW.
Washington DC 20460, (202) 382-4770.
SUPPLEMENTARY INFORMATION:
A. Background
On March 29,1990 (55 FR 11798), the
Environmental Protection Agency (EPA)
promulgated the Toxicity Characteristic
final rule to revise the existing EP
toxicity characteristic. The TC is one of
several characteristic used to identify
wastes which are defined as hazardous
and, as a consequence, are subject to
the subtitle C requirements of the
Resource Conservation and Recovery
Act (RCRA).
In today's notice, the Agency,
invoking good cause under the
Administrative Procedure Act, is
promulgating an extended compliance
date for the TC requirements to
petroleum refining facilities, marketing
terminals and bulk plants engaged in
hydrocarbon recovery and remediation
operations which involve the reinjection
of contaminated ground water into
underground injection wells or
infiltration galleries for 120 days. As
discussed below, EPA believes: (1) Good
cause, under 5 U.S.C. S53, exists for a
short change in compliance date for this
narrow class of TC wastes without prior
notice and comment; and (2) under 5
U.S.C. 705, justice so requires a
postponement of the compliance date.
During the 120 day period, these wastes
will not be a Federal hazadous waste.
This extended compliance date results
from new information that was brought
to the attention of the Agency after the
promulgation of the TC final rule, The
extended compliance date allows the
immediate continued operation of
existing activities while careful
consideration it given to all pertinent
information.
B. Hydrocarbon Recovery and
Reinjection of Contaminated Ground
Water
Subsurface investigations have
revealed that large quantities of free-
floating and dissolved hydrocarbons are
contained In the shallow aquifers
beneath a number of petroleum
refineries marketing terminals and bulk
plants. Many of these facilities have
undertaken operations to remove the
free-floating hydrocarbons and
remediate the contamination. Follow-on
phases of the operation may involve the
remediation of contaminated subsurface
soils and pound water. These recovery
and remediation activities are currently
being conducted under the direction of
various State and local environmental
and water quality authorities.
It is the first phase of such operations
that is of immediate concern to the
Agency. This phase primarily consists of
pumping the free-floating hydrocarbons
from the aquifer beneath the facility.
Some of these operations involve two
pumping systems, One pumping system
is used to bring the free-floating
hydrocarbons to the surface while the
second pumping system reinjects
contaminated ground water to facilitate
the pumping of the free-floating
hydrocarbons and prevent further
migration of the contaminants in the
aquifer. In two pump systems, the
ground water is pumped to create a cone
of depression to promote collection of
free-floating hydrocarbons and thereby
facilitate recovery/removal of the
hydrocarbons from the aquifer. This
pumped ground water, with its high
saturation concentrations of dissolved
hydrocarbon (particularly benzene, due
to the equilibration between the free-
floating hydrocarbons and the water), is
returned to the aquifer via an injection
well or infiltration gallery. The
reinjection/infiltration establishes a
hydraulic gradient that helps to contain
the contamination and maintains the
water table for purposes of the
hydrocarbon recovery. Because of the
significantly high quantities of dissolved
hydrocarbons in the water that is
returned to the aquifer, immediate
application of the TC to this ground
water may result in classification of the
reinjection/infiltration as disposal of a
hazardous waste. If this occurs, use of
UIC Class V wells (which many of these
operations currently use) would no
longer be authorized. Automatic
reclassification of the well as Class IV
wells (infection of hazardous waste into
or above an underground source of
drinking water (USDW) would occur; in
most cases. Class IV wells are
prohibited under section 3020 of RCRA.
C. Environmental Benefit!
The extended compliance date being
promulgated In today's notice will allow
the Agency to seek and consider all
pertinent information concerning
hydrocarbon recovery operations, and
will provide time for the Agency to
develop the best long-term solution to
protect human health and the
environment. The Impacts that RCRA
may have on these operations as a result
of application of the TC (i.e., permit
requirements, corrective action notices,
etc.) may prohibit temporarily, if not
permanently, the reinjection/infiltration
of ground water which industry asserts
is an integral part of the recovery phase
of the operation. Reinjection of the
ground water may serve two main
-------
OSWER DIR. NO. 9541.00-14
40836 Federal Register / Vol. 55, No. 194 / Friday, October 5, 1990 / Rules and Regulations
.__ VMu_M_MR__..|^_lll^_llllll_H_IIIM__-;,HH»_M^^ ««IBBCMHHH[MaBMBBBHB««BHBaMHB«flMNWBHMa^^K«»HinmillB^MKnni
purposes: it facilitates pumping, thua
increasing the recovery rate for free-
floating product, and lessens further
migration of the contaminant plume
within the aquifer. Without reinjection,
industry argues that the recovery phase
may take longer to complete, there is
probable risk of further contamination
of subsurface soils, and the plume of
contaminated ground water is likely to
spread. Furthermore, they argue that it is
not practicable to treat the
contaminated ground water to levels
below those specified in the TC before
its reinjection during the recovery phase
since the water is returned to the aquifer
mixes and equilibrates with the
remaining contaminated ground water
and free-floating product. Therefore, it
attains the same saturation
concentration of dissolved hydrocarbon
as was present before pumping and
treatment. The ground water will
continue to attain the high saturation
levels of dissolved hydrocarbon once
returned to the aquifer until the source
of contamination (i.e., the free-floating
product) is removed. Industry argues
that it is both environmentally beneficial
end technically feasible lo continue
operation in this manner and, once
recovery of free product is complete,
begin ground water and soil
remediation.
D. Interim Final Rule
EPA ia invoking two authorities for
this immediate effective interim final
action. First, EPA is invoking the good
cause exemptions in sections 5S3(b)(3)
and 553(d)(3) of the Administrative
Procedure Act to immediately change
the compliance date with requirements
imposed by the TC for wastes involved
in specific product recovery activities.
Second, EPA is invoking the authority in
5 U.S.C. 705. The ground water will not
be a Federal hazardous waste during the
period of the extension. EPA has only
very recently received information
regarding these operations and believes
that continued operation of these
actions are important for environmental
protection. Aa discussed above, without
the immediate change of the compliance
date for these operations, such activities
might cease. EPA believes that requiring
these facilities to meet all applicable
RCRA and SDWA requirements by the
September 25,1890 effective date of the
TC rule is both impracticable and
contrary to public interest. Therefore, at
petroleum refineries and marketing
terminals or bulk plants currently
engaged in hydrocarbon recovery
operations stemming from handling
crude petroleum and immediate
products of petroleum refining, the
compliance date for the TC is extended
until January 25,1991. Facilities with
existing contracts for construction of
these operations are also included
within the scope of today's notice,
EPA ia today soliciting comments on
regulatory approaches for issues
involved in today's notice and is
considering further extending the
compliance requirements under a
separate regulatory proposal. Until EPA
evaluates fully the issues involved in
activities, the Agency believes that the
current State oversight of these
activitiea and continuing Agency
involvement in these issues will provide
adequate assurances against
development of any imminent threat to
human health and the environment. As
discussed above, if such a change is not
made, environmentally beneficial
activities would, at a minimum, be
suspended for many months, possibly
increasing the potential threat to human
health and the environment due to
futher migration of the contamination.
E. State Authority
1, Applicability of Rules in Authorized
States
Under section 3000 of RCRA, EPA
may authorize qualified States to
administer and enforce the RCRA
program within the State. Following
authorization, EPA retains enforcement
authority under section 3003,3013, and
7003 of RCRA although authorized
States have primary enforcement
responsibility. The standards and
requirements for authorization are found
in 40 CFR part 271.
Prior to HSWA, a State with final
authorization administered its
hazardous waste program in lieu of EPA
administering the Federal program in
that State. The Federal requirements no
longer applied in the authorized State,
and EPA could not issue permits for any
facilities that the State was authorized
to permit. When new, more stringent
Federal requirements were promulgated
or enacted, the State was obliged to
enact equivalent authority within
specified time frames. New Federal
requirements did not take effect in an
authorized State until the State adopted
the requirements as State law. In
contrast, under RCRA section 3006(g) (42
U.S.C. 6928(g)), new requirements and
prohibitions imposed by HSWA take
effect in authorized States at the same
time that they take effect in
nonauthnrized States. EPA is directed to
carry out these requirements and
prohibitions in authorized States,
including the issuance of permits, until
the State is granted authorization to do
so. While States must still adopt
HSWA-related provisions as State law
to retain final authorization, HSWA
applies in authorized States in the
interim.
2. Effect on State Authorizations
EPA will implement the provisions of
today's interim final rule in authorized
States until their programs are modified
to adopt the final toxicity characteristic
and the modification to the State's
program io approved by EPA.
Implementation of today's Interim final
rule beyond the date of a State's
receiving final authorization for the
toxicity characteristic depends upon
actions taken by the State, as discussed
below. EPA will implement the
provisions of today's rule in
nonauthorized States. Today's rule
extends the compliance date for
requirements imposed In the final
Toxicity Characteristic final regulation
(see SS FR11798, March 29,1990) for
certain hydrocarbon recovery
operations.
The Toxicity Characteristic WHS
promulgated pursuant to a HSWA
provision and must be adopted by
States which intend to retain final
authorization. However, today's rule
provides, for 120 days, a less stringent
standard for certain hydrocarbon
recovery and remediation operations
than would be imposed in the final
Toxicity Characteristic as promulgated.
In order to promote environmentally
beneficial hydrocarbon recovery
operations, today's interim final rule
provides that these wastes would not be
hazardous wastes under the Federal
regulations until January 25,1991, and
States would not be required to mandate
their management as such in order to
retain RCRA authorization. However,
Section 3009 of RCRA provides that
States may impose more stringent
requirements than those imposed under
Federal regulations. States, whether
using RCRA authorities (e.g., authorities
under State law where States have
received final authorization to
implement the toxicity characteristic
provisions in lieu of their
implementation by EPA), or other State
authorities under other statues, may
impose hazardous waste requirements
on such operations, or may require other
more stringent conditions upon
management of these wastes.
F. Regulatory, Requirements
1, Regulatory Impact Analysis
Under Executive Order 122tl, EPA
must determine whether a regulation is
"major," and therefore subject to the
requirement of a Regulatory Impact
Analysis. The overall effect of today's
-------
Federal Register / Vol. SS, No, 194 / Friday, October 5, 1990 / Rules and Regulations 40837
ipwv(r
-------
OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 75
Listing of 1,1-Dimethylhydrazine Production Wastes
55 FR 18496-18506
May 2, 1990
HSWA Cluster II
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
PART 261 - IDENTIFICATION AND LISTING OF HAZARDOUS WASTE
SUBPART D - LISTS OF HAZARDOUS WASTES
HAZARDOUS WASTES FROM SPECIFIC SOURCES
1 add K107-K110 to
the subgroup
"Orqanic Chemicals"
261 .32
Industry and EPA hazardous
waste No.
Hazardous waste
Hazard
code
Organic chemicals:
K107.
K108.
K109.
Column bottoms from product separation from
the production of 1,1-dimethylhydrazine (UDMH)
from carboxylic acid hydrazides.
Condensed column overheads from product
separation and condensed reactor vent gases
from the production of 1,1-dimethylhydrazine
(UDMH) from carboxylic acid hydrazides.
Spent filter cartridges from product
purification from the production of
1,1-dimethylhydrazine (UDMH) from carboxylic
acid hydrazides.
(C,T)
(T)
May 2» 1990 - Page 1 of 3
DCL75.9 - 12/9/91
-------
SPA 9,
RCRA REVISION CHECKLIST 75: Listing of 1,1-Dimethylhydrazine Production Wastes (cont'd)
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
"EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
K110.
Condensed column overheads from intermediate
separation from the production of
1,1-dimethylhydrazine (UDMH) from carboxylic
acid hydrazides.
(T)
APPENDIX III TO PART 261
CHEMICAL ANALYSIS TEST METHODS
add compound and
analysis method to
Table 1
Appendix III
TABLE 1. - ANALYSIS METHODS FOR ORGANIC
CHEMICALS CONTAINED IN SW-846
Compound
Method
No.
1,1 -Dimethylhydrazine (UDMH) 8250
APPENDIX VII TO PART 261
BASIS FOR LISTING HAZARDOUS
add, in numerical
order, K107-K110
Appendix
WASTE
VII
May 2, 1990 - Page 2 of 3
DCL75.9 - 12/9/91
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DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 75: Listing of 1,1-Dimethylhydrazine Production Wastes (cont'd)
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
Eoinv^"
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
EPA hazardous
waste No.
Hazardous constituents for
which listed
K107 1,1-Dimethylhydrazine (UDMH).
K108 , 1,1 -Dimethylhydrazine (UDMH).
K109 1,1-Dimethylhydrazine (UDMH).
K110 1,1-Dimethylhydrazine (UDMH).
1
The Federal Register for this Rule contains two typographical errors in the description of the
K107 hazardous waste (55 FR 18505). "1,1-dimethyl-hydrazine* should be "1,1-
dimethylhydrazine" and "hydrazines" should be "hydrazides." This revision checklist contains the
corrected description for K107.
May 2, 1990 - Page 3 of 3
DCL75.9 - 12/9/91
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OSWKR D1R. -NO. y>4i.UU-14
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Wednesday
May 2, 1990
Part IV
Environmental
Protection Agency
Hazardous Waste Management System:
Identification and Listing of Hazardous
Waste and CERCLA Hazardous
Substance Designation and Reportable
Quantity Adjustment—1,1-
Dimethylhydrazlne Production Wastes;
Final Rule and Proposed Rule
^VnflBMI
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1049G Federal kegisler /'Vol! 55, 'No. 05 /Wednesday, May 2/1990 / Rules nnd' Regulations
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Parts 261, 271, and 302
ISWH-FRL-3719-6J
HIM 2050-AC91
Hazardous Waste Management
System: Identification and Listing of
Hazardous Waste and CERCLA
Hazardous Substance Designation and
Reportable Quantity Adjustment—1,1-
Dimethylhydrazine Production Wastes
AGENCY: Environmental Protection
Agency.
ACTION: Final rule.
SUMMARY: The Environmental Protection
Agency (EPA) today is amending the
regulations for hazardous waste
management under the Resource
Conservation and Recovery Act (RCRA)
by listing as hazardous four wastes
generated during the production of 1,1-
dimclhylliydrnzine (UDMH) from
carboxylic acid hydrazides. The effect of
this regulation is (hut these wastes will
be subject to regulation under 40 CFR
parts 2G2-2G6, and parts 270. 271, and
124.
In addition, the Agency also is making
final amendments to regulations
promulgated under the Comprehensive
I7.nvironmental Response,
Compensation, ond Liability Act
{CERCLA) in 40 CFR part 302 that are
related to today's hazardous waste
listings. In particular, EPA is making
final the designation as CERCLA
hazardous substances all of the wastes
made final in today's rule and the final
rcportable quantities that would be
applicable to those wastes.
EFFECTIVE DATE: This regulation
becomes effective on November 2,1990.
ADDRESSES: The official record for this
rulemtiking is identified as Docket
Number F-90-DMMF-FFFFF and is
located in the EPA RCRA Docket, Room
2427, 401 M Street SVV., Washington, DC
20400. The public must make nn
appointment to review docket materials
by calling (202) 475-9327. Copies of the
non-CD! version of the listing
background document, the Health and
Environmental Effects Profiles (HEEPs),
and not readily available references are
available for viewing and copying only
in the OSW docket. Copies of materials
relevant to the CF.RCLA portions of this
rulemaking are also located in Room
2427. U.S. EPA. 401 M Street SW..
Washington, DC 20-100. Doth dockets are
available for inspection from 9:00 a.m. to
4:00 p.m. Monday through Friday,
excluding Federal holidays. The public
may copy a maximum of 100 pages from
the docket at no charge; additional
copies are available at $0.15 per page.
FOR FURTHER INFORMATION CONTACT: •
The RCRA/Superfund Hotline at (000)
424-9340 or at(202) 302-3000. For
technical information on the RCRA
hazardous waste listings, contact Dr.
Cute Jenkins, Office of Solid Waste
(OS-332), U.S. Environmental Protection
Agency, 401 M Street SW., Washington,
DC 20400, (202) 302-4786. For technical
Information on the CERCLA final rule,
contact Ms. Ivette Vega, Response
Standards and Criteria Branch,
Emergency Response Division (OS-210),
U.S. EPA, 401 M St. SW., Washington.
DC 20460, (202) 302-2403.
SUPPLEMENTARY INFORMATION: The
contents of today's preamble are listed
in the following outline:
I. Legal Authority
II. Background
111. Summary of the Fimil Regulation
IV. Response to Comments
A. Concentration Level Criteria for Listing
Waste as Hazardous
D. Assessment Risk for UDMH In the
Waste*
C. Regulatory Impact Analysis
D. Additional Waste Streams
V. Relation to Other Regulations
VI. Test Methods for Compound Added to
Appendix VII
VII. CERCLA Impacts
VIII. Stale Authority
A. Applicability of Rules in Authorized
Slates
D. Effect on State Authorizations
IX. Compliance Dates
A. Notification
D. Interim Status
X. Regulatory Impact Analysis
XL Regulatory Flexibility Act
XII. Paperwork Reduction Act
1. Legal Authority
These regulations are being
promulgated under the authority of
sections 2002(a) and 3001 (b) and (e)(2)
of the Solid Waste Disposal Act, as
amended, 42 U.S.C. 6912(a) and 6921 (b)
and (c)(2) (commonly referred to as
RCRA), and section 102(a) of the
comprehensive Environmental
Response, Compensation, and Liability
Act of 1980, 42 U.S.C. 9602(a).
II. Background
Pursuant to section 3001 of subtitle C
of the Resource Conservation and
Recovery Act (RCRA), EPA today -
promulgates final rules listing four
wastes generated during the production
of 1,1-dimethylhydrazine (UDMH) from.
carboxylic acid hydrazides. The
following discussion provides a brief
overview of regulatory actions affecting
the wastes being finalized today.
On December 20,1984, EPA proposed
to amend the regulations for hazardous
waste management under RCRA by
listing as hazardous four wastes
generated during the production of 1,1-
. dimcthylhydrazine (see 49 FR 49550).
These wastes arc: (1) Column bottoms
from product separation (EPA
Hazardous Waste No. K107), (2)
condensed column overheads from
product separation and condensed
renctor vent gases (EPA Hazardous
Waste No. KlOO), (3) spent filter
cartridges from product purification
(EPA Hazardous Waste No. K109), and
(4) condensed column overheads from
intermediate separation (EPA
Hazardous Waste No. KllO).
The basis for this action was a
determination by the Agency that these
wastes contained significant
concentrations of 1,1-dimethylhydrazine
(UDMH). UDM1I Is carcinogenic.
mutagenic, nnd teratogenic. UDMII is
typically present in each waste at
significant levels. In addition, UDMI I is
mobile and persistent, and can reach
• environmental receptors in harmful
concentrations if these wastes are
mismanaged. (See the preamble to the
proposed listing for those wastes (49 FR
49556) and the Listing Background
Document, available from the
ADDRESSES section, for more
Information on the hazards of these
wastes.)
On August 17,1989. the Agency made
available for public comment additional
data which supports the conclusion (hut
UDMH should be considered a potential
human carcinogen (54 FR 33942). The
Agency requested comments on the use
of this new data as part of the basis for
listing wastes generated from the
manufacture of UDMH. The comments
received on the December 20,1904
proposal to list the four wastes and on
the use of this new data are responded
to in this Federal Register notice. These
comments do not refute the Agency's
conclusion that UDMH is carcinogenic,
mutagenic and teratogenic.
In addition, in a document published
elsewhere in today's Federal Register,
EPA is proposing to list as hazardous
two additional wastes generated during
the production of UDMH from
carboxylic acid hydrazides. These
wastes are: (1) Flush water from the
; catalyst removal system, and (2) spent
catalyst and filter media. As a result of
comments received from a manufacturer
of UDMH in response to the proposed
listing of four wastes generated during
. the manufacture of UDMH (December
20,1904. 49 FR 49556), the Agency
received data that supports a
preliminary determination that these
two additional wastes also should be
listed as hazardous.
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OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55, No. 05 / Wednesday, May 2, 1990 / Rules and Regulations 18437
On November 0, 1ftfi between 11 to 14 *C (52
to 55 °F), which makes this waste
ignilable according to the criteria in 40
CFR 261.21 (o)(l). Also, the pH of the
column bottoms from product separation
(EPA Waste No. K107) has been
measured to be between 13 and 14,
which makes this waste corrosive
according to the criteria in 40 CFR
201.22(a)(l).
EPA has evaluated these wastes
against the criteria for listing hazardous
wastes (40 CFR ZOl.ll(n)), and has
determined that they typically contain
high concentrations of the constituent of
concern (UDMII), that this toxicant Is
mobile and persistent in the
environment, and that the toxicant in
the wastes is regulated by other EPA
regulations, as well as by regulations of
other government agencies. In addition,
one of the wastes is corrosive, and
another is ignilable, and thus these
wastes are nlso being listed as
hazardous based on these
characteiislica. Ihe Agency, therefore,
believes that these wastes are capable
of posing a substantial present or
potential threat to human health or the
environment when improperly treated,
stored, transported, disposed of, or
otherwise managed, and thus are
hazardous wastes. (Additional
information on the hazards and the toxic
constituents of these wastes may be
found in Ihe listing background
document and the Health and
Environmental Effects Profiles, available
as described in the "AOOBESSES"
section.)
The Agency received comments on
the proposed listings from the generator
of the wastes (Uniroyal Corporation) as
well as another manufacturer of UDMH
thai uses a different process not subject
to these listings. Uniroyal also submitted
comments on the new data on UDMH
made available on August 17,1989. We
have evaluated these comments
carefully, and have modified the
supporting documentation accordingly.
This notice makes final the regulations
proposed on December 20,1984, and
provides EPA's response to the
comments received.
The manufacturer of UDMH from
carboxylic acid hydrazides, Uniroyal
Corporation, also supplied the Agency
with information on the generation of
two additional wastes from the
manufacture of UDMII as part of their
comments—namely (1) flush water from
the catalyst removal system, and (2)
spent catalyst and filter media. As a
result, the Agency is proposing to odd
these two wastes to the list of hazardous
wastes in 40 CFR 261.32 in a document
published elsewhere in today's Federal
Register.
IV. Response lo Comments
EPA received comments on several
aspects of the proposed regulations (and
on the use of Ihe data made available
for public comment on August 17.1!)BO)
from the generator of these wastes.
Uniroyal Corporation; the Agency nlso
received comments on the proposed
regulations from another manufacturer
of UDMH that uses a different process
not subject to these listings, Olin
Corporation, The Agency has evaluated
these comments carefully, and has
modified the supporting documentation
to this regulation accordingly, as well as
proposing new hazardous waste listings
based on these comments. This section
presents the comments received, as well
as the Agency's response.
A, Conceniralion Level Criteria for
Listing Waste as Hazardous
One commenter requested that the
Agency's listing of UDMI-I include a
"delisting threshold" so that industry
would have criteria for determining
whether a waste containing UUMi I (or
any other toxicant) is considered
hazardous, and could use (his as a basis
for a petition pursuant to 40 CFR 260.22
to exclude n particular UDMH
manufacturing waste from Ihe list of
hazardous waste, the "delisting"
process.
When evaluating delisting petitions,
the Agency considers a number of
factors, including the presence of cny
additional toxicants other than those for
which the waste was listed and the
behavior of the toxicants in Ihe
environment See 40 CFR 260.22(a).
Therefore, the delisting process is more
complex than a simple evaluation of the
concentration of the toxicant(s) for
which the relevant waste was listed.
The Agency has described its general
approach to evaluating delisting
petitions in the Federal Register. See 50
FR 40000. November 27,1985. In that ,
notice and in many subsequent
proposed and final delisting
determinations, the Agency described
ils evaluation process in detail and
explained how it uses information
provided by the petitioner (e.g., see 54
FR 14101, April 7,19B9). For the reasons
described in those notices and above,
the Agency is not including a
concentration level of UDMH in the
wastes below which the wastes would
not be considered hazardous.
B. Assessment of Risk fur UDMH in the
Wastes
Uniroyiil challenged the Agency's
evaluation of the carcinogenic!ty of
UDMH for several reasons. In response
to the December 20,1904 proposed
Reproduced trom
best available copy.
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18498 Federal Register / Vol. 55, No. 05 / Wednesday, May 2, 1990 / Rules and Regulations
UUMH listings (49 FR 49550), Uniroyal
contended thai a study by Toth,1 which
was used by EPA to conclude that
UUMi f should be considered a probable
human carcinogen (a D2 carcinogen
using EPA's weight-of-evidence
classification system), was so flawed ns
to be invalid for any risk assessment.
Uniroyal also challenged Ihe validity of
EPA's conclusions on the
carcinogenicity of UDMH based on Ihe
interim results of new studies currently
being conducted by Uniroyal. These
new studies were conducted by
Uniroyal pursuant to requirements
under the Federal Insecticide, Fungicide,
nnd Rodenticide Act (FIFRA) (U.S.C.
part 130 ei. seq,), and were proposed to
be used as a partial basis for the UDMH
listing regulations under RCRA on
August 17, 1909 (54 FR 22942).
The response to challenges by
Uniroyal on the use of either the earlier
Toth study or the new interim results of
the studies conducted by Uniroyal are
provided below.
1. Use of the Toth Study to Establish
Carcinogenic Risk of UDMH
Uniroyal stated that EPA based its
risk assessment of the carcinogenicity of
UDM11 solely on a study by Toth.2
Uniroynl contended thai this study
deviated from scientifically valid
protocols, thus invalidating the use of
the study for establishing the
carcinogenic risk of UDMH to humans.
The specific areas where Uniroyal
claimed that the Toth study was not in
conformance with EPA Guidelines for
oncogonicity studies,5 and the Agency's
specific responses to these comments
are given below. In general, however,
while noting that there are certain
deficiencies in the methodological
conduct of the Tolh study, the Agency's
I luman I lealth Assessment Group
(I II1AG) (formerly the Carcinogen
Assessment Group (CAGJ) made a final
determination in 1988 that the Toth study
mny be used as the basis for a
citrcinogenicity determination for
UDM1 i.* This determination was made
1 Toth. B. (1973) 1.1-Dimclhylhydrimne
(Unaymmelrical) Carcinogcncftis in Mice. Ugh)
Microscopic and Uliraitruclurnl Studies on
N«oplnstic Dloud Vessels./ Mil/. CancerInsl,
50:181,
» Tulh, D, (1973). ibid.
9 Pesticide Assessment Guideline*. Subdivision F.
1SMIZ. '
4 U.S.EPA. GAG (June, lime) Evnluation of the
Poli-nllnl Corcinogcnlr.ily of l,1-0tm
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OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55, No. 05 / Wednesday, May 2, 1990 / Rules and Regulations 18499
thai EPA uses to evaluate the effects of
toxicants, that ref|iiire any minimal
survival rate at different stages of a
bionssay.
In addition, survival rates in the Toth
study did no! demonstrate that the MTD
wns exceeded. Among mule mice, the
survival rale was lower than in the
untreated animals, but only after more
than 50 weeks of exposure. Since 84
percent of the animals in this group
developed vasculur tumors and 78
percent lung tumors, with average
latencies of 42 and 53 weeks,
respectively, it is highly likely that
cancer induction itself was responsible
for mortality after 50 weeks. Among
male hamsters, in which the latency for
tumor development was longer with
fewer incidences, the survival rate was
the same for treated and control
animals. If adjustments are made for
very early mortality in female hamsters,
then the long term survival rate was also
equivalent in treated animals and
controls.
Excessive noncancer liver pathology
was not reported in the Tolh study, nor
wns it found by the EPA audit of this
study, as would be expected if (he MTD
were exceeded.10 Based upon the
mortality results and lack of reported
pathology, there is little direct evidence
that the MTD was exceeded.
c. Uniroyal challenged the validity of
the Toth study because complete
necropsy records were not maintained,
and portions of the study were
conducted by technicians in the absence
of direct supervision.
Response; The audit performed by
EPA considered in detail this problem
with the Toth study, noting that there
was a large turnover of technicians, and
that none of the observations,
calculations or other records for the
necropsy histopathology report sheets
were dated, signed, or initialled. Despite
these deficiencies noted by the auditors,
the CAG >' concluded that the Toth
study was still adequate for a risk
assessment, since no evidence was
found to suggest that errors were made
by the technicians under these
conditions.
d. Uniroyal contended that animal
randomization wns inadequate to
prevent in-breeding (a condition that
could lead to heightened sensitivity to
carcinogens as B result of genetic drift).
Response: According to the EPA
Guidelines,12 humans are assumed to be
'« U.S. EPA (ScplRtittmr 24. IfldO) Guideline* for
Oardnognnic Risk Assessment. i/>;W.
1' U.S. EI'A. CAG (Jimuiiry 7, IOB7). ibid
5 U.S. F.PA (Spplrmimr 24.190(1). ibid.
as sensitive to the agent as the most
sensitive strains of animal species,
unless there is knowledge otherwise. As
a result, this allegedly possible change
in sensitivity of the colony of mice
maintained by Dr. Toth's laboratory
would not alter the weighl-of-evidence
determination for UDMI I.
Furthermore, there is no evidence
from pathological data on the control
animals evaluated in Dr. Toth's
laboratory to suggest that any
genetically enhanced susceptibility to
spontaneous carcinogenesis
(carcinogenesis that occurs without the
intentional administration of a test
substance) has occurred due to genetic
drift. If there was such heightened
sensitivity, then increased spontaneous
carcinogenesis in the control animals
would be expected to accompany any
genetically enhanced susceptibility to
exogenously induced carcinogenesis
(carcinogenesis that occurs as the result
of the administration of a test
substance). The EPA audit of the Toth
study did not reveal any increased rate
of spontaneous carcinogenesie in the
control animals maintained by Dr.
Toth's laboratory compared to animals
of the same species maintained by other
laboratories and the supplier. This fact
discredits Uniroyal's theory of in-
breeding leading to enhanced
susceptibility to carcinogenesis to
exogenous carcinogens.
In addition, the rate of spontaneous
carcinogenesis was seen to be identical
for the control groups maintained by Dr.
Toth's laboratory two years prior to the
UDMH bioassay as at the same time as
the UDMH bioassny. This further
supports the conclusion that there was
no genetic drift over time due to in-
breeding or other factors in the animals
tested.
Furthermore, the Swiss albino strain
of mice used In the Toth study are highly
susceptible to carcinogenesis. This
facilitates the development of tumors
over the short life span of this rodent
species. As a result, any genetic drift
thai would occur in these mice is likely
to lead to decreased sensitivity, not the
other way around. Thus, the results of
the Toth study are not compromised by
any alleged enhanced sensitivity of the
animals to carcinogens.
e. Uniroyal contended that another
deficiency in the Toth study was a lack
of suitable analytical verification of the
test material during the study.
Response: The EPA auditors
recognized that the overall Analytical
verification of the study did not conform
to today's General Laboratory Practice
standards,19 but concluded that despite
the deficiencies, there was no reason to
doubt that the mice received the test
substances (UDMH and Alar*) at the
indicated dosage levels. The EPA
auditors found, however, that the
UDMI I purchased from Aldrich
Chemical Company had been analyzed
for chemical composition by Aldrich. In
addition, the auditors found that the
UDMH mixed with water in known
proportions were in fact analyzed for
chemical composition, and that these
were the mixtures that were
administered to the animals in the Toth
study.
The EPA auditors as well as CAG
concluded that despite the uncertainties
with the analytical method, there was
no evidence to suggest that the UDMH/
water solutions did not contain the
concentrations reported in the study.
This Is because even in the absence of
analytical verification, laboratory
methods for making solutions of known
concentrations by the addition of
accurately measured portions of a
substance (UDMH in this instance) have
historically been found to be capable of
great nccuracy, in the absence of any
decomposition or other losses of the
substance from the water. Any
deterioration of the UDMH/water
solutions, through hydrolysis or
volatilization of the UDMH, would have
resulted in decreased cancer rates, not
the other way around.
In addition, even if the analysis of the
UDMH obtained from Aldrich Chemical
Company, the supplier, were inaccurate,
as impliedly alleged by Uniroyal, it was
known that Aldrich itself had analyzed
the UDMH for purity. There is no
evidence that the UDMH contained any
toxic contaminants, or that any toxic
contaminants were present in sufficient
concentration or of sufficient potency to
have confounded the observations of the
carcinogenic effects of UDMH,
f. Uniroyal contended that even if the
Tolh study were valid, then the
estimated risk from UDMH exposure
was lower than the value derived by
EPA, based on that study. The q, *
(carcinogenic potency) value of 8.60
(mg/kg/day) "'was calculated using nn
observed carcinogenic response of 42
out of SO mice by EPA. Uniroyal
claimed, however, that only 25 of 40
mice were diagnosed as having blood
vessel tumors, basing this contention on
an audit performed for Uniroyal.14
•» U.S. EPA. OPP (April 22,19B5). ibid.
" Veijelinovilch, S.D., Report to Uniroy.it, Inc.
(I9IM).
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1B500 Federal Register / Vol. 55. No. 85 / Wednesday. May 2, 1990 / Rules and Regulations
Response: EPA's audit1S of the Toth
study confirmed the tumor incidence
found by Dr. Toth. In addition, GAG *»
has concluded that since the control
animals lived longer (not suffering the
acute toxic effects from UDMH that
resulted in premature death, thus
presumably having more time to develop
tumors) the potency of UDMH as a
carcinogen may even be underestimated
using data from the Toth study.
Moreover, even if the incidence of
tumors was the lower rate contended by
Uniroyal, that rate is still highly
significant and would not alter the
determination that UDMH is a category
B2 carcinogenic.
g, Uniroyal expressed the position
that EPA cannot list the UDMH
manufacturing wastes as hazardous
until the scientific validity of the
carcinogenicity study conducted by Toth
was ascertained or repeated. Uniroyal
noted that EPA itself was currently
conducting an audit of the Toth study as
a result of comments on the study
submitted by Uniroyal regarding
proposed regulations under F1FRA, and
suggested that EPA should take the
results of this audit into account.
Response: The results of the EPA
auditl7 referred to by Uniroyal became
available after Uniroyal submitted its
comments on the proposed UDMH
listings. As discussed earlier, this audit,
although acknowledging certain
deficiencies in the Toth study, noted
that the increases in the tumor
incidences were so striking that even if
the controls had been dropped from the
study, it would not weaken the findings
of the study in any regard. The audit
team found that data obtained from
missing pathology slides that were
subsequently located further
substantiated the tumor incidences
stated in the publication by Dr. Toth.
Thus, this audit does not provide any
support for Uniroyal's position that the
Toth study is invalid for performing a
carcinogenic risk assessment.
2. Use of the Interim Results of Studies
on UDMH Carcinogenicity Currently
Being Conducted by Uniroyal
As part of its review of the pesticide
manufactured from UDMH, Daminozide
(Alar®), under the Re-registration
Process under FIFRA, EPA required
Uniroyal Corporation to conduct
additional studies on the health effects
of both UDMH AND Daminozide. Based
on the interim results of the data
submitted by Uniroyal, EPA proposed to
cancel certain pesticide product
registrations under FIFRA.18
On August 17,1989, EPA announced
its intent to use this new interim data
developed by Uniroyal as part of the
basis for listing wastes from the
manufacture of UDMH as hazardous
under RCRA,19 since EPA believed that
this data provided strong evidence that
UDMH is a carcinogen. Uniroyal
responded to the August 17,1989 Notice
of Data Availability with the following
contentions that the data did not
support a determination that UDMH
was a probable human carcinogen. The
specific challenges to the significance of
these data for a carcinogenicity
determination are given below.
a. Uniroyal claimed that the biological
significance of the interim results of the
UDMH and Darninozide study are
questionable. For example, while
positive tumorigenic results were seen in
mice, no significant increases in tumor
incidences were detected in any of the
exposed groups of rats.
Response: The lack of detectable
effects in rats cannot be construed as
evidence for noncarcinogenicity. Only
an extremely potent carcinogen would
be expected to induce an increase in
tumor incidence as early as 12 months
from the start of exposure. In fact, the
positive results seen in mice as early as
8 months, suggest that UDMH is not
only a carcinogen, but a rather potent
one. Furthermore, it is generally
recognized that species may differ in
sensitivity to an applied dose, so the
interim results with rats is not
inconsistent with this expectation.
b. Uniroyal argued that there was no
increase in the number and severity of
liver islands, as would.be expected if an
agent was a carcinogen.
Response: The liver is made up of
liver cells called hepatocytes. In the
liver island assay most of the liver is
removed to stimulate rapid cell division
among the remaining hepatocytes.
Subsequent administration of a
potentially carcinogenic agent may
induce genetic changes resulting in the
gain or loss of specific enzyme systems
in the hepatocytes. Since the cells are
rapidly dividing, one enzymatically
altered cell will reproduce to form an
"island" of similar cells. These islands
can be made visible by differential
staining techniques. The assay is
regarded as a test for probable
carcinogenicity since the enzymatic
changes are considered by many
investigators to be early steps in the
progression of cellular changes leading
to cancer.
The tumors resulting from exposure to
UDMH, however, occur in blood vessels,
a different type of tissue than located in
the liver. Thus, the lack of any increase
or severity of the liver islands does not
negate the carcinogenicity
determination.
c. Uniroyal argued that since positive
results were seen in mice only at 40 and,
80 ppm, dosages that Uniroyal claims
are dearly in excess of the maximum
tolerated dose (MTD), any conclusions
on the carcinogenicity of UDMH based
on results from tests which exceeded the
MTD are not valid.
Response: According to established
Guidelines 10 using body weight gains,
survival, etc., EPA believes that the
MTD was not exceeded. Mortality that
did occur during the first 12 months of
exposure was considered by the EPA
reviewers 21 to more likely be the result
of cancer rather than liver necrosis.
Since tumor increases were detected in
intermediate dosed males as well as in
females, in which the pathological
effects and other toxic signs were
minimal, the results are not considered
to be invalidated by the alleged
overdosage.
Even if the MTD was exceeded, the
data can be used in assessing
carcinogenicity according to EPA's risk
assessment Guidelines, if the results are
carefully reviewed to ensure that
responses are not due to factors
operating only at levels above MTD.22
These include effects such as metabolic
activation at high concentrations and
hormonal changes. There is little
information to indicate that UDMH
requires this type of activation,
however, which would call into question
the possibility that the observed effects
were due to an exceedance of the MTD.
In addition, there is also no data to
indicate that important hormonal
changes are taking place, another effect
that could be caused if the MTD were
exceeded.
The pathological changes in the liver
would be of serious concern in
evaluating whether the MTD had been
exceeded if the liver itself was the
primary target organ for the
carcinogenic effects of UDMH. The
possible genetic alterations with
increased cell turnover rates resulting
from the pathological changes could
lead to tumor induction in some cases.
s U.S. EPA. OPP (April 22.1985), ibid.
1 U.S. EPA. CAC (January 7.1987), ibid.
' U.S. EPA. OPP (April 22,1985), ibid.
18 54 FR 22558. May 24.1989,
19 54 FR 33942.
10 U.S. EPA [September 24.1980). ibid,
" U.S. EPA. OPP (May IS, 1989). Second Peer
Review of Daminozide (Alar) and UDMH
(Unsymmetrical 1,1-dimethylhydrazme].
" U.S. EPA (September 24.1886). ibid. pp. 1-5
4.
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OSWER DIR. NO. 9541.00-14
Federal Register / Vol. 55, No. B8 / Wednesday, May 2, 1990 / Rules and Regulations 18501
UDMI I, however induces lumore in
blood vessels and not in the liver itself.
As a result, I!IB changes in the liver do
not confound thn observations of
c;,'in;inogc;nio effects in oilier organs, llio
blood vessels.
Thus, EPA docs nol believe that the
MTU was exceeded in the recent
Uniroyal studies. Secondly, even if the
MTD has been exceeded, EPA's careful
review of the data hns oscertoined thai
Ihe carcinogenic effects were
independent of nny physiological
changes which could have been caused
by an exceedance of Ihe MTD. The
results, therefore, still may be used to
determine thnt UDMII is a carcinogen.
d, Uniroyal claimed that the
carcinogenic effects were accompanied
by a variety of hematological, liver
enzyme and liver pathology changes
Ihut may well have boon responsible for
the (amor induction. Thus, the
commenter contended that the tumors
should not be considered to be the result
of a carcinogenic effect of UDMII.
Response: The hernalological, liver
enzyme, and liver pathology changes are
considered by EPA to be a result of
tumor growth, anil thus nol responsible
for their induction. In other words, these
changes in the liver and blood are
consitlered to be Ihe result of the
carcinogenic effects of UDMH, and not
due to any direct action of UDMH by a
lexicological mechanism unrelated to
caroinogenesis. In addition, it should be
noted that tumors were induced in
females in which alterations of liver
enzyme activity and hematological
parameters were minimal. Finally,
increased tumor incidences were also
seen in the lungs, nn organ showing few
indications of pathological changes.
Thus, Ihe Agency does not agree thai the
observation of hematological and liver
changes negates a conclusion that
UDMII should be considered a
causative agent for carcinogenesis.
e. In general, Uniroyal contended that
Ihe weight-of-evidence from Ihe interim
results of the studies on UDMH
cnrcinogenicily did not support a
determination that UDMH should be
classified as a category "B2" carcinogen,
a "probable human carcinogen."
Response; Given thnt significant
increases in tumor incidences were seen
at more than one silo, in both sexes of
mice, and to occur very early, nnd
because the responses occurred in the
lungs even at lower, relatively non-toxic
doses, the newer, interim data is
considered by the Agency to be
consistent with the earlier data
regarding the carcinogenicity of UDMH.
According to EPA's Guidelines for
cancer risk assessment, a chemical is
classified into category B2 when there is
sufficient evidence for carcinogenicity in
animals, but insufficient data in humans.
Sufficient evidence for carcinogenicily
in animals occurs when there is an
increased incidence of malignant or
combined benign and malignant tumors
(a) in multiple strains or species (bj in
multiple experiments (e.g., with different
dose levels) or (c) to an unusual degree
in a single experiment. The interim
results of the studies satisfy both
categories "a" and "c" in that significant
tumor increases occurred in both mice
and hamsters and the response occurred
to an unusual degree, e.g., 84 percent
incidence of hemangiosarcomas in male
mice. Thus, since human data is
inadequate, while animal data is
sufficient, UDMH is slill considered to
fit the classification weight-of-evidence
category B2.
f. Uniroyal claimed that the interim
data were also inadequate to establish a
quantitative, or dose-response, risk
estimate for UDMI I.
Response; The Agency need not
develop quantitative wcight-of-evidence
for a potential carcinogen as a
necessary basis for a determination that
a toxicant of concern or wastes
containing that toxicant should be
regulated as hazardous under RCRA.
The available study on UDMH does
indicate that it is a potent carcinogen.
The final studies on UDMI I
carcinogenicity to be submitted to EPA
in the future are not likely to alter this
evaluation.
g. Uniroyal also claimed that the
results from the interim studies being
conducted by Uniroyal demonstrated
that UDMH was nol mulogcnic.
Response: A total of 8 mutagenicily
studies were submitted by Uniroyal to
EPA during 1909 as part of the Interim
results on UDMH oncogenicity. The
following three tests were considered to
be negative and acceptable: (1) The
Ames Salmonella test, (2) unscheduled
DNA synthesis, and {3) primary rat
hepatocyte and Cl lO/aberration. The
use of an unusual solvent (0.25 Normal
hydrochloric acid) in these tests,
however, limits the use of the results of
these tests to predict mutagenesis that
may occur under more usual.test
conditions.
Two CHO/hprl gene mutation assays
have also been submitted by Uniroyal,
one using the hydrochloric acid solvent.
In the second, an attempt was made to
buffer the solution. In these latter two
studies there were enough instances of
elevated frequencies to suggest that
there may be mutagenic activity. Token
as a whole, therefore, the results must
be considered to be equivocal, rather
thnn negative.
The interim results of the mutagrmicily
studies being conducted by Uniroyal
also do nol call into question the
validity of the earlier UDMH tests that
were positive for mutagenicity, since the
conditions used by Uniroynl differed
from those in earlier tests. The positive
results of earlier mutagenicity studies
are discussed in the background
documentation for this final rule as well
as in the May, 1908 technical support
document developed by EI'A as par! of
the FIFRA reregislration review of
Alar."
In summary, after carefully evaluating
(he comments, the Agency believes thnt
the available evidence supports a
determination that UDMH is
carcinogenic, mutagenic, and
leratogenic.
C. Additional Waste Stream$
The commenter, the generator of the
four wastes covered by today's
rulemnking, supplied information on Iho
generation of two additional
wastestreams, both having the potential
for significant UDMH contamination. As
a result of this new Information, the
Agency, in an accompanying action in
today's Federal Register, is proposing to
add two additional waste streams from
the manufacture of UDMH from
carboxylic acid hydrazides to the list of
hazardous wastes,
V, Relation to Other Regulations
A, Toxicity Characteristics (TC)
As one of the mandates of HSWA. Ihe
Agency expanded the loxicity
characteristics (TC) by including
additional toxic organic chemicals.
Under the March 29,1990 final rule (55
FR 11796J, hazardous waste listings will
not be affected by the toxicity
characteristic—that is, all the listings
will remain in effect, including those
listings that were based on the presence
of TC constituents. It is EPA's intention
that the hazardous waste listings will
continue to complement the TC.
Although the TC currently does nol
include UDMH as a toxicily
characteristic contaminant, any future
addition of UDMI! to the TC may
capture other wastes contaminated by
UDMH that are not covered by wastes
K107, K108, K109 and KllO. In addition,
the recently promulgated TC may
capture other wastes generated by the
UDMH manufacturing industry that
contain the current toxicity
characteristic contaminants that are not
covered by wastes K107, K108, K109 and
KllO.
1 U.S. EPA, OH' (Mny, 1900). ibid.
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1S502 Federal Register / Vol. 55. No. 85 / Wednesday, May 2, 1990 / Rules and Regulations
B. Land Disposal Restrictions
HSWA mandated that EPA
promulgate under a specific schedule
land disposal restrictions for all wastes
listed or identified as hazardous prior to
the enactment of HSWA (see RCRA
section 3004(g)[4)(C}). HSWA also
requires the Agency to make a land
disposal prohibition determination for
any hazardous waste that is newly
identified or listed after November 8,
1984, within six months of the date of
identification or listing (RCRA section
3004(g){4), 42 U.S.C. 6924{g)(4)).
However, the statute does not provide
for an automatic prohibition of the land
disposal of such wastes if EPA fails to
meet this deadline. The Agency is
evaluating treatment standards for
newly listed wastes K107, K108, K109,
and K110.
VI. Test Methods to Be Added to
Appendix III
Appendix HI of 40 CFR part 261 is a
list of test methods that are approved
for use in demonstrating that the
constituents of concern in listed wastes
are not present at concentrations of
concern. The Agency is designating
Method 8250 for testing for UDMH. and
is adding this method to Appendix III of
part 261. The proposed regulation
proposed the use of Method 8250 for
testing for UDMH in the wastes (49 FR
49556); no comments were received
regarding the use of this method for this
purpose. Method 8270 is also believed to
be a suitable method since most
commercial laboratories now prefer to
use the capillary column
chromatography specified in this method
to improve the chromatographic
resolution. The only difference between
these two methods is the use of a
capillary column gas chromatography
technique instead of a packed column
technique.
Persons wishing to submit delisting
petitions must use one of these methods
(or an equivalent one] to demonstrate
the concentration of UDMH in their
wastes.24 (See 40 CFR 260.22(d)(lJ.) As
part of their petitions, EPA requests
submission of quality control data
demonstrating that the methods they
have used yield acceptable recovery
(i.e., >80% recovery at concentrations
above 1 MS/8) on spiked aliquots of their
waste.
The above methods are in 'Test
Methods for Evaluating Solid Waste:
Physical/Chemical Methods," SW-846,
14 Petitioners may use other methods to analyze
for UDMH if. among other things, they demonstrate
the equivalency of these methods by submitting
their quality control and assurance information
along with their analysis data. (See 40 CFR 260.21.)
3rd Ed., as updated, available from:
Superintendent of Documents,
Government Printing Office,
Washington. DC 204C2, (202) 783-3238,
Document Number: 055-002-81001-2.
VII. CERCLA Impacts
All listed hazardous wastes, as well
as any solid waste that exhibits one or
more of the characteristics of a
hazardous waste (as defined in 40 CFR
261.21 through 261.24), are hazardous
substances under section 101(14)(C) of
the Comprehensive Environmental
Response, Compensation, and Liability
Act of 1980, as amended (CERCLA).
(CERCLA hazardous substances are
listed in Table 302.4 at 40 CFR 302.4.
along with their reportable quantities
(RQs).) CERCLA section 103(a) requires
that persons in charge of vessels or
facilities from which a hazardous
substance has been released in a
quantity that is equal to or greater than
its RQ immediately notify the National
Response Center of the release [at (800)
424-8802 or in the Washington, DC
metropolitan area at (202) 426-2675]. In
addition, section 304 of the Superfund
Amendments and Reauthorization Act
of 1986 (SARA) requires the owner or
operator of a facility to report the
release of a hazardous substance to the
appropriate state emergency response
commission (SERC) and to the local
emergency planning committee (LEPC)
when the amount released equals or
exceeds the RQ for the substance.
According to the "mixture rule" used
for notification under CERCLA and
SARA (50 FR 13463, April 4,1985). the
release of mixtures must be reported
when the amount released equals or
exceeds the RQ for the waste, unless the
concentrations of the constituents of the
waste are known. When the
concentrations of the individual
constituents of a hazardous waste are
known, the release of the hazardous
waste would need to be reported to the
NRC and to the appropriate LEPC and
SERC when the RQ of any of the
hazardous constituents is equaled or
exceeded. RQs of different hazardous
substances are not additive under the
mixture rule (except for radionuclides.
see 54 FR 22536, May 24,1989), so that
spilling a mixture containing half an RQ
of one hazardous substance and half an
RQ of another hazardous substance
does not require a report.
Under Section 102 of CERCLA, all
hazardous wastes newly designated
under RCRA will have a statutorily-
imposed RQ of one pound unless and
until adjusted by regulation under
CERCLA. In order to coordinate the
RCRA and CERCLA rulemaking with
respect to new waste listings, the
Agency also proposed on December 20,
1984 regulatory amendments under
CERCLA authority in connection with
the proposed listings to: (1) Designate
wastes K107 to KllO based on the
hazardous substances under section 102
of CERCLA; and (2) adjust the RQs of
wastes K107 to KllO based on the
application of the RQ adjustment
methodology under section 102(a) (49 FR
49556).
The RQs for each waste and for each
of the hazardous constituents are
identified in the table below. The
constituent of concern, UDMH, has an
RQ that has undergone adjustment since
the proposed listing of UDMH
production wastes. On August 14,1989.
EPA adjusted the RQ for UDMH from
one pound to 10 pounds (54 FR 33426).
The adjustment of the RQs of wastes
K107, K108, K109 and KllO from the
statutory one-pound level is based on
the current RQ of the constituent in
these listings. Because the only toxic
constituent of concern in the wastes
(UDMH) has an RQ of 10 pounds, the
RQs of the four wastes likewise are
being set today as 10 pounds. These RQs
will become effective on the effective
date of today's action, when the wastes
simultaneously become hazardous
substances under CERCLA.
Hazardous substance
Waste No. K107
Waste No K108
Waste No K109
Waste No K110
Con-
stituent
UDMH...
UDMH...
UDMH...
UDMH...
RQ
10 !bs.
10 IDS.
10 Ibs
10 Ibs.
10 Ibs
10 Ibs.
10 Ibs.
10 Ibs.
VIII. State Authority
A. Applicability of Rules in Authorized
States
Under section 3006 of RCRA, EPA
may authorize qualified States to
administer and enforce the RCRA
program within the State. (See 40 CFR
part 271 for the standards and
requirements for authorization.)
Following authorization, EPA retains
enforcement authority under sections
3007, 3008, 3013, and 7003 of RCRA.
although authorized States have primary
enforcement responsibility.
Prior to the Hazardous and Solid
Waste Amendments of 1984 (HSWA). a
State with final authorization
administered its hazardous waste
program entirely in lieu of EPA
administering the Federal program in
that State. The Federal requirements no
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OSWER DIR. NO. 9541.00-14
Federal Kugisfor / Vol. 55, No. WO / Wednesday, May 2, 1900 / Hubs and Rc(|uliititms 13503
I(H!j»i;r applied in Ihu authorized Stale,
.•mil EPA could not issuu permits fur uny
futilities in the Stale Ihut (ho State was
tiiilhoraed to permit. When nnw, more
s!ringnnl Federal rci|ulrpmonts wore
promulgated or enonled, the State was
obliged to enact equivalent authority
wilhin specified time frames. New
Federal requirements did not lake effect
in fin nulhorizud Stati; unlil the Stiite
ndopled the requirements as Stale law.
In contrast, under suction 3000(g) of
RCRA, 42 U.S.C. n»2Q(gj. new
requirements and prohibitions imposed
by the HSWA take effect in authorized
Slates at the same lime that they take
effect in nonaulliorizcd Slntes. EPA is
directed to implement those
requirements ond prohibitions in
authorized Stales, inr.Iuding the issuance
of permits, until the Slate is grunted
authorization to do so. While Stntes
roust still adopt I1SWA related
provisions as State law to retain final
authorization, the IISWA applies in
authorized States in the Interim.
Todny's rule is promulgated pursuant
to section 3001{e)(2) of RCRA, a
provision added by the IISWA.
Therefore, these wastes have been
added to Table 1 in 40 CFR 271,1(|),
which identifies the Federal program
requirements that are promulgated
pursuant to HSWA, and that lake effect
in all Suites, regardless of their
authorization stains. States may apply
for either interim or final authorization
fur the HSWA provisions identified In
Table 1, as discussed in the following
section of this preamble. Because EPA
promulgated rules regarding the timing
for I ISWA listings after this rule was
proposed, the existing regulatory time
frames supersede the discussions in the
preamble to the proposed rule.
O. Effect on Slate Authorizations
As noted above, EPA will implement
today's rule in authorized States until
ihny modify their programs to adopt
these rules, ond the modification is
approved by EPA. Because the rule is
promulgated pursuant to HSWA, a State
submitting a program modification may
apply to receive either interim or final
authorization under section 3Q06(g)(2) or
300fl(ljJ, respectively, on the basis of
regulations that ore substantially
equivalent or equivalent to EPA's. The
procedures and schedule for State
program modifications under section
300(i(b) are described in 40 CFR 271.21.'
The same procedures should be
followed for section 3000(g)(2).
Section 27i,Zl(e)(2J requires that
Slates that have finul authorization
must modify their programs to reflect
Federal program chimges and must
subsequently submit the modifications
to EPA for approval. Slate program
modifications to conform to today's ruin
must be made by July 1,1091, if only
regulatory changes ore necessary, or by
July 1.1992, if statutory changes are
necessary. See 40 CFR 2?l,21(e)(2)(iv)
nnd 271.21(e)(2)(v). These deadlines can
be extended in exceptional cases. See 40
CI'R 271.21(e)(3).
States with authorized RCRA
programs already may have regulations
similar to those in today's rule. These
State regulations have not been
assessed against the Federal regulations
being promulgated today to determine
whether they meet the tests for
authorization. Thus, a State is not
authorized to implement these
regulations in lieu of EPA until the Stale
program modification is approved. Of
course, States with existing regulations
may continue to administer and enforce
their regulations as a matter of State
law. In implementing the Federal
program, EPA will work with Status
under cooperative agreements to
minimize duplication of efforts. In many
cases, EPA will be able to defer to the
States in their efforts to implement their
programs, rather than take separate
actions under Federal authority.
States that submit official applications
for final authorization less than 12
months after the effective dale of these
regulations are not required to include
standards equivalent to these standards
in their applications. However, a State
must modify ita program by the
deadlines set forth in 40 CFR 271.21 (e).
States that submit official applications
for final authorization 12 months after
the effective date of these standards
must include standards in their
application. Section 271,3 sets forth the
requirements a State must meet when
submitting its final authorization
application.
IX. Compliance Dates
A. Notification
Under section 3010 of RCRA, EPA
may waive the notification requirement
otherwise applicable to persons
managing newly-regulated hazardous
waste. The Agency has decided to
waive the RCRA section 3010
notification requirement for only those
persons who generate, transport, treat,
store, or dispose of hazardous wastes
subject to today's rule that have
previously notified EPA or an authorized
State of hazardous waste activities and
have received an identification number.
The Agency believes that most, if not
all, persons who manage these wastes
have already notified EPA and received
an EPA identification number and
therefore will not have to re-notify.
However, any person who generates.
transports, treats, stores, or disposes of
these wastes has not previously notified
and received an identification number,
that person must notify EPA or nn
aullioriznd Slate HO later than July 31,
1990. of these activities pursuant to
section 3010 of RCRA. Notification
instructions are set forth in 45 FR 12740,
February 20, 19UO.
O. I'eriniUiuy
Because I ISWA requirements ure
applicable in authorized States at the
same time ns in unauthorized Slates,
EPA will regulate K107-K110 unlil Stylus
are authorized to regulate these wastes.
Thus, once this regulation becomes
effective, EPA will apply Federal
regulations to these wastes and to their
management In both authoriznd nnd
unauthorized States. Facilities (h«t treal,
store, or dispose of K107-K110, but that
have not received a permit pursuant to
section 3005 of RCRA and are not
operating pursuont to interim status,
might be eligible for interim stalus undur
HSWA (see section 3005(e)(l)(A)(ii) of
RCRA, as amended). In order to operate
pursuant to interim status, the eligible
facilities are required to possess an EPA
ID number pursuant to 40 CFR 270.70(a),
and will be required to submit a I'urt A
permit application by November 2,1990.
Currently permitted facilities that
manage UDMH wastes must submit
Class I permit modifications if they are
to continue managing the newly
regulated wastes in units thai require a
permit. The facilities must oblnin the
necessary modification by the effective
date of the rule, or they will be
prohibited from accepting additional
UDMII wastes.
Interim status facilities that manage
UDMH wastes In units that require a
permit must file an amended Part A
permit application under 40 CFR
270.10(gJ if they are to continue
managing newly regulated wastes. The
facilities must file the necessary
amendments by the effective dale of the
rule, or they will not receive interim
status with respect to the UDMH wastes
(i.e., they will be prohibited from
accepting additional UDMH wastes until
permitted).
Newly regulated facilities (i.e.,
facilities at which the only hazardous
wastes that are managed are newly
regulated UDMH wastes) must qualify
for interim status by the compliance
dale of the rule in order to continue
managing UDMH wastes prior to
receiving a permit. Under 40 CFR 270.70,
an existing facility may obtain Interim
status by getting an EPA identification
number and submitting a Part A permit
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18504 Federal Register / Vol. 55, No, 85 / Wednesday, May 2, 1990 / Rules and Regulations
application by the effective date of this
rule. To retain interim status, a newly-
regulated land disposal facility must
submit a Part B permit application
within one year after the effective date
of the rule and certify that the facility is
in compliance with all applicable ground
water monitoring and financial
responsibility requirements {see RCRA
section 3Q05(e)(3)),
EPA recently promulgated
amendments to the procedures for
permit modifications for treatment,
storage, and disposal facilities (see 53
FR 37934, September 28,1988). The
following discussion assumes
implementation in accordance with the
new rule. EPA will implement the
UDMH listing regulations by using the
new permit modification procedures,
consistent with EPA policy (see 53 FR
37933, September 28,1988).
Under the new regulation in 40 CFR
270.42, there are now three classes of
permit modifications with different
submittal and public participation
requirements for each class. In 40 CFR
270.42{g), which concerns newly listed
or identified wastes, a permitted facility
that is "in existence" as a hazardous
waste facility for the newly listed or
identified waste on the effective date of
the notice must submit a Class 1
modification by that date. Essentially,
this modification is a notification to the
Agency that the facility is handling the
waste. As part of the procedure, the
permittee must also notify the public
within 90 days of submittal to the
Agency.
Next, within 180 days of the effective
date, the permittee must submit a Class
2 or 3 modification to the Agency. A
permittee may submit a Class 2
modification if the newly regulated
waste will be disposed in existing TSD
units and will not require additional or
different management practices from
those authorized in the permit. A Class 1
modification requires public notice by
the facility owner of the modification
request, a 60 day public comment
period, and an informal meeting
between the owner and the public
within the 80 day period. The rule
includes a "default provision," so that
for Class 1 modifications, if the Agency
does not make a decision within 120
days, the modification is automatically .
authorized for 180 days. If the Agency-
does not reach a decision by the end of
that period, the modification is
permanently authorized. If the newly
regulated waste requires additional or
different management practices, a Class
3 modification is required. The initial
public notification and public meeting •
requirements are the same as for Class
2. However, after the end of the public
comment period, the Agency will
develop a draft permit modification,
open a public comment period of 45
days and hold a public hearing.
X. Regulatory Impact Analysis
Under Executive Order 12291, EPA
must determine whether a regulation is
"major" and, therefore, subject to the
requirement of a Regulatory Impact
Analysis. The generator subject to
today's rule, Uniroyal Corporation, is
not currently manufacturing UDMH. As
a result, none of the wastes covered by
this final regulation are currently being
generated, and therefore no costs from
their management as hazardous would
be incurred at the present time.
However, Uniroyal may resume
production; when this occurs the total
additional incurred cost for disposal of
the wastes as hazardous would be less
than 32,000 (based on previous
production levels), well under the $100
million constituting a major regulation,
This cost would be insignificant and
would result from minimal additional
compliance requirements, as these
wastes were already handled as if they
were hazardous.
Since EPA does not expect that the
amendments promulgated here will have
an annual effect on the economy of Si 00
million or more, result in a measurable
increase in cost or prices, or have an
adverse impact on the ability of U.S.-
based enterprises to compete in either
domestic or foreign markets, these
amendments are not considered to
constitute a major action. As such, a
Regulatory Impact Analysis is not
required,
The Agency received comments on
the economic impact analysis included
with the December 20, 1984 proposed
regulations. Uniroyal criticized the
Agency's economic analysis because it
did not consider the impact of co-
disposal of the aqueous wastes with
other plant wastes by deep well
injection. Uniroyal contended that in the
event that the subject hazardous wastes
are mixed with other solid wastes, the
resulting mixture would be hazardous
wastes bv the mixture rule (see 40 CFR
Because the commenter ceased
underground injection of their UDMH
manufacturing wastes in May, 1985
(because of having ceased the
production of UDMH itself), long before
promulgation of today's rule, the
commenter will not be subject to the
permitting requirements of parts 144 and
146 for Class 1 wells receiving hazardous
wastes (assuming no other hazardous
wastes are being injected). As a result.
no additional management costs would
be incurred by a designation as
hazardous wastes formerly disposed in
this manner. The commenter would stfll
be required to comply with She parts 144
and 146 requirements for Class 1 wells
for the disposal of non-hazardous
industrial wastes, however, if the deep
well continues to receive other wastes
from the facility not regulated as
hazardous under RCRA.
XI. Regulatory Flexibility Act
Pursuant to the Regulatory Flexibility
Act, 5 U.S.C. sections 601-612, whenever
an agency is required to publish a
general notice of rulemaking for any
proposed or final rule, it must prepare
and make available for public comment
a regulatory flexibility analysis that
describes the impact of the rule on smail
entities [i.e., smail businesses, small
organizations, and small governmental
jurisdictions). No regulatory flexibility
analysis is required, however, if the
head of the agency certifies that the rule
will not have a significant economic
impact on a substantial number of small
entities.
The hazardous wastes listed here are
not generated by small entities (as
defined by the Regulatory Flexibility
Act), and the Agency received no
comments that small entities will
dispose of them in significant quantities.
Accordingly, I hereby certify that this
regulation will not have a significant
economic impact on a substantial
number of small entities. This
regulation, therefore, does not require a
regulatory flexibility analysis.
XII. Paperwork Reduction Act
This rule does not contain any
information collection requirements
subject to OMB review under the
Paperwork Reduction Act of 1980,44
U.S.C. section 3S01 et saq.
List of Subjects
40 CFR Part 281
Hazardous waste. Recycling.
40 CFR Part 271
Administrative practice and
procedure. Confidential business
information, Hazardous materials
transportation. Hazardous waste, Indian
lands. Intergovernmental relations.
Penalties, Reporting and recordkeeping
requirements. Water pollution control,
Water supply.
40 CFR Part 302
Air pollution control. Chemicals,
Hazardous materials, Hazardous
materials transportation, Hazardous
substances. Intergovernmental relations.
Natural resources. Nuclear materials,
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OSWER DIR. NO. 9541.00-14
Federal Register / Vul. 5S, No. 05 / Wednesday. May 2. 1990 / Rules and Regulations 18505
rijslir.ides and pests, Radioactive
inatcnuls, Reporting nnd rccordknopfng
requirements, Siipcrfund, Waste
h iNilinnnt nn(i disposal. Water pollution
control.
Diiied: April 23,1890.
William K. Rcilly,
Administrator.
For the reasons sot out in the
preamble, Title 40 of the Code of Federal
Regulations is amended as follows:
PART 261—IDENTIFICATION AND
LISTING OF HAZARDOUS WASTE
1. The authority citation for part 201
continues to read us follows:
Authority: 42 U.S.C. 0905, 6912(a), 6921.
6022, and 6930.
2. In § 261.32, add the following wnsln
streams to the subgroup 'Organic
Chemicals':
§ 261.32 Hazardous wastes from specific sources.
Industry and EP/l
hazardous wss'.c No.
Hazatdous wcsle
Hazard
corio
Oiga.iic chemicals:
«•*«*»«
K107 Column bottoms tictn product separation from the production ol t.l-dimethyl-hydrazlns (UDMH) (torn carboxyllc ocid (CJ)
hydrazines.
K10S , Condensed column ovecrwwds Imm product separation and condensed reactor venl rjsses from the production ol 1.1- (I,T)
dim?thythydraztnB (UDMH) Irom carboxylic acid hydiazides.
K109 , Spent filter cartridges from product purification from the production of 1,t-dimethylhydra;r,in« (UDMH) from cartxjxyte acid (T)
hydraiides,
K110 Condensed coltimn overheads from intermediate separation Irom lha production of 1,1-dimethylhydraziiie (UDMH) Irom (T)
carboxylic acid hydrazides.
3, Add Ihc following compound and
unalysis methods in alphabetical order
to Table 1 of Appendix HI of part 2G1:
Appendix III—Chemical Analysis Tcsl
Methods
TABLE 1,—ANALYSIS METHODS FOR OR-
GANIC CHEMICALS CONTAINED IN SW-
846
Compound
Melhod
No.
4. Add the following entries in
numerical order to Appendix VII of part
201:
Appendix VII—Masis for Listing
Hazardous Waste
EPA
hazardous I lazardous constituents for which listed
waste No.
K107 t.l-Dlmelhylhydrazine (UDMH).
K108 1,1-Diroe!bythyd>azine (UDMH).
K109 1,1-Dimethylhydrazine (UDMH).
K110 1,1-Dimelhylhydrailne (UDMH).
PART 271—REQUIREMENTS FOR
AUTHORIZATION OF STATE
HAZARDOUS WASTE PROGRAMS
5, The authority cilnlion for part 271
continues to read as follows:
Authority: 42 U.S.C, 6905,0912(a), and 6920.
0. Section 271.1(j) ia amended by
adding the following entry to Table 1 in
chronological order by date of
publication:
§271.1 Purpose and scope.
1,1-Dimelhylhydrazine (UDMM)..
8250
TABLE 1.—REGULATIONS IMPLEMENTING THE HAZARDOUS Arm SOLID WASTE AMENDMENTS OF 1984
date
Title of regulation
Federal
Register refer- FHoclive dale
ence
May 1, t990 Listing Wastes from the Production of UDMH from Carboxylic Acid Hydrazfdes..
[insert Federal November 2,
Register 1990.
page
numbers).
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10508 Federal Register / Vol. 55, No. 85 / Wednesday, May 2, 1990 / Rules and Regulations
PART 302—DESIGNATION,
REPORTABLE QUANTITIES, AND
NOTIFICATION
7, The authority citiolion for part 302
continues to read as Follows:
Authority: Sees. 101(1)(14) and I02(b) of the 8, Section 302.4 is amended by adding
Comprohonsive Envlronmontal Response,
Compensation and Liability Act of 1900,42
U.S.C, 9001(14) and 9602; sees. 311 and 501(n)
of the Federal Water Pollution Control Act,
33 U.S.C, 1321 and 1301.
the wnstc streams K107, K108, K109. and
K110 to Table 302.4.
§ 302.4 Designation ol hazardous
substances.
TABLE 302.4—LIST OF HAZARDOUS SUBSTANCES AND REPORTABLE QUANTITIES
Hazardous substance
KIDS'
Column boltoms from product separation horn lh« production ol 1,1-dimolhyIhy-
drazine (UDMH) Irom cnrtxxyllc «ck) hydrazines,
K108 . .
Condensed column oveiheads from product separation and condensed reactor
venl gases from the production ol 1,1-dimelhylhydrazine (UDMH) Irom carbox-
ylic ecid hydrazidos.
K109
SjMMit filler cartridges tram product purification Irom Jho production ol 1,1-
dimethythydrazins (UOMH) Irom carboxylic scid hydrazklos.
KIIO
Condensed column overheads Irom intermediate separation from th« production
ol 1,1-dimethythyrfrazine (UDMH) Irom carboxylic acid hydraiides.
CASRN
Rogulatory
synonyms
•
•
Statutory
RO
10
10
10
10
Code
4
4
A
4
RCflA
WR9tO
num.
bor
K«07
K108
KI09
K110
Final RQ
Category
*
X
X
X
X
*
Pounds
10 H.54J
10 H.54)
10 (4.54)
10 (4.5.1)
1 4—indicates thai !he slatutory source lor designation of this hazardous substance under CERCLA Is HCRA section 3001.
[I'R Doc. 90-9970 Filed 5-1-90: 0:45 om|
BILl 1HQ CODE »560-50-H
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OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 76
Criteria for Listing Toxic Wastes; Technical Amendment
55 FR 18726
May 4, 1990
(Non-HSWA Cluster VI)
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
PART 261 - IDENTIFICATION AND LISTING OF HAZARDOUS WASTE
SUBPART B - CRITERIA FOR IDENTIFYING THE CHARACTERISTICS OF
HAZARDOUS WASTE AND FOR LISTING HAZARDOUS WASTE
CRITERIA FOR LISTING HAZARDOUS WASTE
replace "unless" after
"Appendix VIII" with
"and"; delete "any of"
after "considering";
delete "not" after
"waste is"
261.11(a){3)
May 4, 1990 - Page 1 of 1
DCL76.9 - 12/9/91
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18728
OSWER DIR. No. 9541.00-14
Federal Register / Vol. 55. No. 87 / Friday. May 4. 1990 / Rules and Regulations
Authority: 42 U.S.C. 7401-764Z,
§52.2220 [Amended]
2. In § 52.2220, paragraph (c)(9l)(m) is
redesignated as (c)(91)(ii).
§52,2222 [Amended]
3. In § 52,2222 paragraph (C) is
redesignated as (c).
[FR Doc. 90-10353 Filed 5-3-90; 8:45 amj
BILLING CODE 6560-5O-M
40 CFR Part 261
[FRL-3762-3]
Hazardous Waste Management
System: Identification and Listing of
Hazardous Waste
AGENCY: Environmental Protection
Agency.
ACTION: Technical amendment.
SUMMARY: On May 19,1980, as part of
its final and interim final regulations
implementing section 3001 of the
Resource Conservation and Recovery
Act (RCRA), EPA promulgated a series
of criteria for listing wastes as
hazardous. The Agency is today
conforming the language of the
regulation to reflect the Agency's intent
and consistent interpretation.
EFFECTIVE DATE: May 4,1990.
FOR FURTHER INFORMATION CONTACT:
The RCRA/Superfund Hotline at (800)
424-9348 or at (202) 382-3000. For
technical information, contact Mr.
William A. Collins, Office of Solid
Wastes (OS-332), U.S. Environmental
Protection Agency, 401 M Street, SW..
Washington, DC 20460, (202) 382-4791.
SUPPLEMENTARY INFORMATION! On May
19,1980, EPA promulgated final and
interim final regulations implementing
section 3001 of the Resource
Conservation and Recovery Act
(RCRA). Section 300l{a), among other
provisions, requires the Agency to
promulgate criteria for listing wastes as
hazardous. The Agency's regulations to
implement this section of the Act is
codified at 40 CFR 281.11.
The provision involved in this
technical correction is § 261.11(a)(3), the
criteria for listing toxic wastes. This
provision states that the Agency will list
a waste as toxic if the waste contains
any toxic constituent listed in appendix
VIII of part 261 unless, after considering
a series of enumerated factors, the
Administrator determines that the waste
is not capable of posing a substantial
hazard to human health and the
environment even if managed
improperly. Appendix VIII contains a
i list of substances shown in scientific
studies to be toxic, carcinogenic,
mutagenic or teratogenic. The factors set
out in the rule—drawn for the most part
from sections 1004(5) and 3001(a) of
RCRA—include the nature of the toxic
constituents, the concentration of toxic
constituents in the waste-, the migratory
potential of the constituents and their
mobility and persistence after migrating
from a waste. Other factors are the
plausible ways the waste could be
mismanaged, the quantity of waste
generated, damage incidents caused by
past management of the waste, and
action by other regulatory agencies
regarding the waste or waste
constituents.
In practice, the Agency has always
evaluated the waste factors (or those
factors that are relevant) in its specific
listing actions at issue, and then made
judgments as to whether wastes
containing an Appendix VIII constituent
is capable of causing substantial harm if
mismanaged. (See Listing Background
Documents of: May 19,1980,45 FR
33084-33137; November 12,1980,45 FR
74884-74894; November 23,1980,4S FR
78524-78550; January 16,1981,46 FR
4614-4620; May 29,1981, 48 FR 27473-
27480; May 10,1984, 49 FR 19922-19923;
January 14,1985, 50 FR 1978-2006;
October 23,1985, 50 FR 42936-42943;
December 31,1985, 50 FR 53315-53320;
February 13,1986, 51 FR 5327-5331,
February 25,1988, 51 FR 8537-6542; May
28,1986,51 FR 19320-19322; September
13,1988, 53 FR 35412-3S421; October 6,
1989.54 FR 41402-41408; and December
11,1989, 54 FR 50968-50979 (explaining
the basis for listing the waste in 40 CFR
281.31,261.32, and 261.33 based upon the
criteria for listing in § 261.11(a)(3))). As
written, however, the rule could
mistakenly be read to imply that wastes
are hazardous if they contain an
appendix VIII constituent (conceivably
in any concentration), without
considering the enumerated factors
which serve only to rebut the
presumption,
As stated above, the Agency has
never applied the rule in this way, and
has always interpreted the rule to
require consideration of the appropriate
factors in determining whether to list
wastes: By appropriate factors, the
Agency does not mean that each factor
enumerated in | 261.11(a)(3) must be
considered in a particular case. The
Agency therefore believes that the
wording of the rule should be corrected
to reflect the proper standard
established by the rule. Accordingly, the
Agency is amending § 261.11(a){3) to
state that wastes will be listed as
hazardous if they contain one or more
appendix VIII constituents and after
considering the enumerated factors, the
Administrator determines that the waste
is capable of posing substantial harm if
managed improperly. This change in
language is not intended to and will not
affect existing Agency listing practices
based upon the Agency's consistent
interpretation of the 1980 regulatory
language. Thus, EPA has and will
continue to provide more or less
detailed consideration of the factors, as
well as to consider factors jointly, as
appropriate.
Because this action is a technical
clarification of an existing rule, EPA
believes that notice and comment
requirements do not apply to and are
unnecessary for today's action. Any
regulatory action was achieved by the
1980 rule and by the numerous listings
providing EPA's interpretation of the
rule. In any event, EPA believes that
good cause exists for today's changes
under section 553(b)(3)(B) of the
Administrative Procedures Act because
this is a technical clarification (or at
most an interpretive rule).
List of Subjects in 40 CFR Part 2S1
Hazardous waste, Recycling.
Dated: April 20,1990.
Henry L. Longest n,
Acting Assistant Administrator, Office of
Solid Waste and Emergency Response.
PART 261—IDENTIFICATION AND
LISTING OF HAZARDOUS WASTE
1. The authority citation for part 281
continues to read as follows:
Authority: 42 U.S.C. 6905, 6912(a), 6921, and
6922.
2. In § 261.11, paragraph (a)(3)
introductory text is revised to read as
follows:
§ 261.11 Criteria for listing hazardous
waste.
(a) * ' •
(3) It contains any of the toxic
constituents listed in Appendix VIII and,
after considering the following factors,
the Administrator concludes that the
waste is capable of posing a substantial
present or potential hazard to human
health or the environment when
improperly treated, stored, transported
or disposed of, or otherwise managed:
[FR Doc. 90-10326 Filed 5-3-90; 8:45 am|
BILUNO COOi «5«0-50-*l
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OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 77
HSWA Codification Rule, Double Liners; Correction
55 FR 19262-19264
May 9, 1990
(HSWA Cluster II)
Note: The final rule addressed by this checklist corrects 264.221 (c) and 264.301 (c) as
promulgated on July 15, 1985 (50 FR 28702; Revision Checklist 17 H). This correction is based
on a decision reached in the U.S. Court of Appeals for the District of Columbia on June 23, 1987
concerning a lawsuit filed against EPA. States not yet authorized for Revision Checklist 17 H are
encouraged to adopt these corrections at the same time the Revision Checklist 17 H provisions
are adopted.
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUW-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
PART 264 - STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS
WASTE TREATMENT, STORAGE AND DISPOSAL FACILITIES
SUBPART K - SURFACE IMPOUNDMENTS
DESIGN AND OPERATING REQUIREMENTS
1 insert "for units where
the Part B of the
permit application is
received by the
Regional Administrator
after November 8,
1984" after "permit"
264.221 (c)
SUBPART N - LANDFILLS
DESIGN AND OPERATING REQUIREMENTS
add sentence regard-
ing applicability of
264.301 (c) only where
Part B of the permit
application is
received after
November 8, 1984
264.301 (c)
1
"Issuance" should not be changed to "insurance" in this paragraph; this is a typographical error
in the FR for this correction notice (55 FR 19263).
May 9, 1990 - Page 1 of 1
DCL77.9 - 12/9/91
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19282
DIE. No. 9541.00-14
Federnl Register / Vol. 55, No, 90 / Wednesday, May 9, 1990 / Rules and Regulations
be commingled in (he same sack and
counted toward the 10 pound minimum,
284.511 Direct Country Sack Label.
Direct country sacks must be labeled
with PS Tag 116. The tag is white and
specially coded to route the mail Jo a
specific country and airport of
destination. The blocks on the tag for
dale, weight, and dispatch information-
must be completed by the Postal Service
and may not be completed by the
mailer. Tag 115, International Priority
Airmail, must also be affixed to the
Direct Country Sacks, Tag 115 is a "Day-
Glo" pink tag that identifies the mail lo
ensure it receives priority handling.
234.52 Mixed Direct Country Bundle
Sacks
284.S21 General. The direct country
bundles containing six or more pieces
destined to a specific country that
cannot be made up in direct.country
sacks, must be enclosed.in orange
Priority Mail sacks unless other
equipment is specified by the
acceptance office.
284.522 Mixed Direct Country Sack
Label. The sack label must be completed
as follows;
Line 1: DIS Acceptance Post Office
Routing Code
Line 2: international Priority Airmail
Line 3: Mailer, Mailer Location
Example;
DIS, Philadelphia. PA 190
International Priority Airmail
ABC Store, Philadelphia, PA
284.53 Nonpresort/Residual Mail
Sacks
284.531 General. The working
bundles of mixed country mail and loose
items should be enclosed in orange
Priority Mail sacks unless other
equipment is specified by the
acceptance office. Nonpresorted letter-
size mail consisting of 400 pieces or
more may be presented In trays if
authorized by the acceptance office.
Working bundles of mixed mail cannot
be enclosed in Mixed Direct Country
Sacks.
284.532 Nonpresort/Residual Mail
Sack Label. The sack label must be
completed as follows:
Line 1: Appropriate U.S. Exchange
Office and routing code
Line 2: International Priority Airmail—
WKG
Line 3: Mailer, Mailer Location
Example:
AMF, Boston, MA 021
International Priority Airmail—WKG
CPA Company, Boston, MA
284.54 Tag* and Weight Maximum for
Sacks
284.541 Weight Maximum. The
maximum weight.of the sack and
contents must not exceed 66 pounds.
284.542 Tag 115 and Tag 118. All IPA
sacks (direct country, mixed direct
country bundle sacks and nonpresort/
residual mail sacks must be labeled with
Tag 115, International Priority Airmail,
Tag 115 is a "Day-Glo" pink tog that
identifies IPA mail to ensure that it
receives priority treatment Tag 116 is a
dispatching tag to be used only for
Direct Country Sacks. Tag 116 is white
and specially coded to route the mail to
a specific country and airport of
destination. The blocks on the tag for
date, weight, and dispatch information
must be completed by the Postal Service
and may not be completed by the
mailer. Postal tags and sacks are
available from the post office.
234.6 Bundle and Sack Label
Information. Mailers may obtain routing
information forfacing slips and sack
labels from the acceptance post office.
' Routing information is also printed In
Publication 507, International.Priority
Airmail Mailer Guidelines, and
Handbook IM-201 International Priority
Airmail Guide lines,
284.7 Customs Forms Requirements
284.71 Letters and Letter Packages.
See 224.5.
284.72 Printed Matter. See 244,6.
284.73 Small Packets. See 284.5.
A transmittal letter making the
changes in the pages in the Internattooal
Mail manual will be published and
transmitted to subscribers
automatically. Notice of issuance of the
transmittal letter will be published in
the Federal Register as provided by 39
CFR 20.3.
Fred Eggleston, ,
Assistant General Counsel, Legislative
Division.
[FR Doc. 90-10822 Filed &-8-90: 8:45 am)
BILLWQ CODE 7710-ia-U
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 52
IFRL-3783-5]
Approval and Promulgation of State
Implementation Plans; Montana
AGENCY: Environmental Protection
Agency.
ACTION: Final rule; correction,
SUMMARY: On December 2,1988 (53 FR
48645) EPA added 40 CFR 52.1382(c)
which described an air quality modeling
commitment made by Montana.
However. 40 CFR 52.1382(c) which
described Class II designations already
existed. Today's notice redesignates 40
CFR 52.1382(0), which pertains to air
quality modeling, as 40 CFR 52.1382(d),
On June 7.1989 (54 FR 24341) EPA added
40 CFR 52.1387, stack height regulations.
However, a § 524387. visibility
protection, already existed. Today's
notice redesignates § 52.1387, stack
height regulations, as § 52.1308.
EFFECTIVE DATES: January 31,1989, for
the corrections to 40 CFR 52.1382. July 7,
1989, for the corrections to 40 CFR
52.1387,
FOR FURTHER INFORMATION CONTACT.
Laurie Ostrand, Air Programs Branch.
Environmental Protection Agency, 999
18th Street, suite 500, Denver, Colorado
80202-2405, (303) 293-1814, FTS 330-
1814.
Dated:.April 28,1990.
Irwtn L. Dickstein,
Acting Regional Administrator.
40 CFR part 52, subpart BB. is
amended as follows.
PART 52—{AMENDED!
Subpart BB—Montana
1. The authority citation for part 52
continues to read as follows:
Authority: 42 U.S;C. 7401-7642
5 52.1382 [Amended]
2. Section 52.1382 is amended by"
redesignating paragraph (c) (which was
inadvertently added on December 2,
1988 (53 FR 48845)) as (d),
§52.1387 [Amended]
3. Part 52 is amended by redesignating
§ 52,1387 (which was inadvertently
added on June 7,1980 (54 FR 24341J) as
| 52.1388.
[FR Doc. 90-10620 Filed 5-8-90:8:45 am)
BILLING CODE SMO-50-U
40 CFR Part 264
[FRL-3394-9J
Hazardous Waste Management
System; Final Codification Rule;
Correction
AGENCY: Environmental Protection
Agency.
ACTION: Final Rule; correction.
SUMMARY: EPA is issuing a correction
notice for || 2B4.221(c) and 264.301{c) as
promulgated on July 15,1985 (see 50 FR
28747 and 28748 respectively). This
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Federal Register / Vol. SS, No. 90 / Wednesday, May 9, 1990 / Rules and Regulations 19283
correction notice is based on a decision
reached in the United States Court of
Appeals for the District of Columbia on
June 23,1987, concerning a lawsuit filed
against EPA. This correction notice
applies to certain landfill and surface
impoundment units for which the Pert B
of the permit application was received
by November 8,1984. Permits issued for
units in this category are not required to
include conditions Imposing double liner
and leachate collection system
requirements as a matter of statute
pursuant to section- 3004(o) but may
include such requirements where
necessary to protect human health and
the environment on a case-by-case basis
pursuant to section 3005(c).
EFFECTIVE DATE May 9, 1990.
FOB FURTHER INFORMATION COKTACTJ
Mr. Alessi Otte (202) 382-4854.
SUPPLEMENTARY INFORMATION; On fune
23,1987, the United States Court of
Appeals for the District of Columbia
issued its decision in United
Technologies Corp. vs. U.S,
En vironmental Protection Agency. The
lawsuit challenged a number of aspects
of EPA's July 15,1985, final rule
interpreting amendments to the
Resource Conservation and Recovery
Act (RCRA) enacted in HSWA. The
Court of Appeals upheld all but one of
EPA's interpretations. The only portion
of the rule that the Court found lacking
dealt with the applicability of the
minimum technological requirements
(i.e., double liner and leachate detection
and collection systems) provision
contained in section 3004(o){l) of the
Act, 42 U.S.C section 6924(o}(l], The
Court concluded as follows:
We do find that 40 CFR Sec. 295.221,
265.301 are invalid to the extent that they
impose Section 3004(o) technological
requirements on owner* and operators whose
applications for a final determination on their
Section 3005 permits were received before .
November 0.1984.
EPA in this final rule is making
conforming changes to its regulations in
line with the Court of Appeals decision.
In this regard, EPA interprets the
decision as applying to section
3004 (o)(l) requirements where permit
applications were received by the date
of enactment of HSWA, for purposes of
requiring double liners and leachate
collection systems as permit conditions
under section 3005(c). The conforming
changes appear in 40 CFR part 264.221
and 264.301.
Petitioners did not challenge and the
decision does not address the
applicability of the minimum
technological requirements under
section 3013, which was also codified in
the July IS, 1985 rule. Section 3015
contains its own applicability provision.
It applies to new, replacement, and
expanded surface Impoundments and
landfill units that qualify for interim
status and that receive waste after May
8,1985 (six months after the dale of
enactment of HSWA}. It subjects these
facilities to the "requirements of section
3(XM(o)." In light of the separate
applicability plan describe above, EPA
interprets this language as referring to
the substantive requirements In section .
3004(o) rather than its applicability
provisions. Hence, section 3015 applies
without regard to the date the owner/
operator submitted a part B permit
application. Since part 265 Implements
section 3015, no change is necessary to
part 285.
Similarly, the decision has no impact
on the applicability of minimum
technological requirements under
section 30050). Section 3005(j) again
contains its own applicability provision.
It requires owners and operators of
surface Impoundments in existence and
qualifying for interim status on
November 8,1984, to stop receiving
hazardous waste by November 8,1988,
unless the owner or operator retrofits
the unit to come into "compliance with
the requirements of section - .
3004(o](l)(A)" by November 8,1988, or
qualifies for a statutory exemption.
Again, EPA interprets this provision as
applying the substantive requirements of
section 3004(o) to the units described in '
the separate furisdictional provisions of •
section 3005(j). Hence, the Court's
decision to read section 3004(o) as
applying to units for which part B •.
applications are first submitted after
November 8,1984, has no impact on the
surface impoundment retrofit
requirements. . • .
In addition, nothing in the Court of
Appeals decision addresses or affects
EPA's ability to condition permits • ..'
pursuant to RCRA section 3005(c)(3) to
ensure protection of human health and
the environment. Thus, regardless of the
date of permit application. Regional
Administrators can determine, based on
a case-by-case evaluation, that a permit
may need to be conditioned to include
minimum technological requirements,
due to the particular circumstances
associated with a facility or the
characteristics of a specific site.
List of Subjects in 40 Fart 264
Hazardous waste. Insurance, '
Packaging and containers, Reporting
and recordkeeping requirements,
Security measures. Surety bonds.
Dated: April 27.1990.
William K. Reilly,
Adminislrator.
For the reasons set out in the
preamble, title 40 of the Code of Federal
Regulations is amended as follows:
PART 264—STANDARDS FOR
OWNERS AND OPERATORS OF
HAZARDOUS WASTE TREATMENT,
STORAGE, AND DISPOSAL
FACILITIES
1. The authority citation for part 2&4
continues to resd as follows:
Authority: 42 U.S.C. 8905, 8812(8), 69Z4 and
6925.
2. Section 264.221 is amended by
revising paragraph (c) to read as
follows:
§ 264.221 Design and operating
requirements.
* * # « '• # .>*'..
(c) The owner or operator of each new
surface impoundment, each new surface
Impoundment unit at an existing facility,
each replacement of an existing surface
impoundment unit, and each lateral
expansion of an existing surface
impoundment unit, must Install two or •
more liners and leachate collection • .
system between such liners. The liners
and leachate collection system must :
protect human health and the
environment. The requirements of this
paragraph shall apply with respect to all
waste received after insurance of the
permit for units where the part B of the
permit application is received by the
Regional Administrator after November
8,1984. The requirement for the
installation of two or more liners in this
paragraph may be satisfied by the
installation of B top liner designed,
operated, and constructed of materials
to prevent the migration of any
constituent into such liner during the
period such facility remains in operation
(including any post-closure monitoring
periodj, and a lower liner designed,
operated, and constructed to prevent the
migration of any constituent through
such liner during such period. For the
purpose of the preceding sentence, a
lower liner shall be deemed to satisfy
such requirement if it is constructed of
at least a 3-foot thick layer of
recompacted clay or other natural
material with a permeability of no more
than 1X10"* centimeter per second.
« * « * *
3. Section 264.301 is amended by
revising paragraph (c) to read as
follows:
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19264
OSWER DIR. No. 9541.00-14
Federal Register / Vol. 55, No. 90 / Wednesday, May 9, 1990 / Rules and Regulations
5 264.301 Design and operating
requirements.
« t • • «
(c) The owner or operator of each new
landfill, each new landfill unit at an
existing facility, each replacement of an
existing landfill unit, and each lateral
expansion of an existing landfill unit.
must install two or more liners and a
leachate collection system above and
between the liners. The liners and
leachate collection systems must protect
human health and the environment. The
requirements of this paragraph shall
apply with respect to all waste received
after issuance of the permit for units
where the part B of the permit
application is received by the Regional
Administrator after November 8,1964.
The requirement for the installation of
two or more liners in this paragraph may
be satisfied by the Installation of a top
liner designed, operated, and
constructed of materials to prevent the
migration of any constituent into such
liner during the period such facility
remains in operation (including any
post-closure monitoring period), and a
lower liner designed, operated, and
constructed to prevent the migration of
any constituent through such liner
during such period. For the purpose of
the preceding sentence, a lower liner
shall be deemed to satisfy such
requirement if it is constructed of at
least a 3-foot thick layer of recompacted
clay or other natural material with a
permeability of no more than IXIO"'
centimeter per second.
* * * • *
|FR Doc, 90-10842 Filed 5-4-00; 5:45 am]
BILLING CODE MW-SO-M
40 CFR Part 350
[OPTS-400039A; FRL-3734-«J
Notice of Change of Address for
Submission of Information Under the
Emergency Planning and Community
Rlght-to-Know Act; Correction
AGENCY: Environmental Protection
Agency (EPA).
ACTION: Final rule; correction.
SUMMARY: EPA issued a change of
address notice that was published in the
Federal Register of January 5,1990 (55
FR 420). The P.O. Box number was
inadvertently misstated. This notice
corrects that P.O. Box number.
DATES: This document is effective May
9.1990.
FOR FURTHER INFORMATION CONTACT:
Doug Sellers, Project Officer, Title III
Reporting Center, Environmental
Protection Agency. 401 M St.. SW..
Washington, DC 20460, Telephone: 202-
332-3587.
SUPPLEMENTARY INFORMATION: In the
Federal Register of January 5,1990 (55
FR 420), EPA issued a notice announcing
the new mailing address to be used by
facilities when submitting toxic
chemical release forms and trade
secrecy claims to EPA under section.313
of the Emergency Planning and
Community Right-to-Know Act of 1988
(also known as Title III). The P.O. Box
numberfor the new mailing address was
incorrectly stated as "223779" in the
preamble and codified text on page 420,
in the third column, in two places: the
eleventh line of the SUPPLEMENTARY
INFORMATION paragraph and the next to
the last line of the codified text. The
correct mailing address is: Title III
Reporting Center, Environmental
Protection Agency, P.O. Box 23779,
Washington, DC 20026-3779,
Dated: April 25.1990.
Linda A. Trevors,
Director. Information Management.Division,
Office of Toxic Substances.
|FR Doc. 90-10843 Filed 5-8-90; 8:45 a.m.]
BILLINO COOC *MO-«M>
FEDERAL COMMUNICATIONS
COMMISSION
47 CFR Part 73
(FCC 90-125)
Broadcast Services; Withdrawal of
Disqualifying Major Changs
Amendments
AGENCY: Federal Communications
Commission.
ACTION: Final rule.
SUMMARY: The Commission revises
5573.3571, 73.3572, and 73.3573 of its
rules regarding processing of AM. FM,
and television applications to allow an
applicant who submits a major
amendment, that would otherwise
require the assignment of a new file
number and place the applicant at the
end of the processing line, to withdraw
the amendment-Applicants In.
comparative cases may withdraw such
amendments any time prior to
designation of the application for
hearing: or subject to the discretion of
the Administrative Law Judge after
designation for a hearing. This policy
has existed with regard to applicants in
comparative cases since the late 1970's.
This action is taken to formally codify
the policy with regard to all applicants.
emcrivn DATI: May e, 1990.
ADDRESSES: Federal Communication
Commission, Washington, DC 20554.
FOR FURTHER INFORMATION CONTACT.
Marilyn Mohrman-Gillis, Mass Media
Bureau. (202) 632-7792.
SUPPLEMENTARY INFORMATION: This is a
synopsis of the Commission's Order.
FCC No. 90-125, adopted April 9,1990.
and released May 1,1990. The full text
of this Commission decision is available
for inspection and copying during
normal business hours in the FCC
Dockets Branch (Room.230), 1919 M
Street, N.W., Washington. DC. The
complete text of this decision may also
be purchased from the Commission's
copy contractor, Internationa!
Transcription Services, (202) 857-0800,
2100 M Street, NW., suite 140,
Washington. DC 20037.
Synopsis of Order
1. The Commission revises 47 CFR
73.3571, 73.3572, and 73.3573.regarding
processing of AM, FM, and television
applications to permit an applicant to
withdraw a pre-designation amendment
to an application that is mutually
exclusive with other applications if.it
would.require assignment assignment of
a new file number and place that
applicant at the end of the processing
line. The Order also amends the rules to
permit applicants.to withdraw pre-
designation:rnajor amendments during
the hearing stage of a proceeding at the
discretion of the Administrative Law
Judge. Finally, single applicants are
permitted to withdraw a major change
amendment.
2. The rules being amended had
required that where an applicant
submits a major amendment after the
period for amendment had expired but
before the application had been
designated for a hearing, if applicable,
the application would be assigned a new
file number and placed at the end of the
processing line. In comparative cases,
this had the effect of removing the
applicant from the processing. In cases
involving a single applicant, the
applicant was again subjected to
competing applications and petitions to
deny. Since the late 1970's the
Commission has permitted applicants in
comparative cases to withdraw such
amendments rather than be removed
from the proceeding. Sec e.g., Golden
Shores Broadcasting Co.. 2 FCC Red
4743 (1987); Tequesta Television, Inc.. 61
RR 2d 1403 (1937). The Commission
issued this Order to codify this
previously established policy.
3. In making these amendments, the
Commission recognized that the purpose
of the original rule was to eliminate
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OSWER DIE. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 78
Land Disposal Restrictions for
Third Third Scheduled Wastes
55 FR 22520-22720
June 1, 1990
(HSWA Cluster II and Non-HSWA Cluster VI)
Notes: 1) The Federal Register addressed by this checklist is the last of five Congressionally
mandated prohibitions on land disposal of hazardous wastes. Previous checklists based on the
Congressional mandate include Revision Checklists 34, 39, 50 and 63. Revision Checklists 62
and 66 correct the First Thirds Rule addressed by Revision Checklist 50. Revision Checklist 83
(56 FR 3864) addresses changes to the Third Thirds Rule, Because of the changes made to the
tables and appendices by this correction notice, States are strongly encouraged to adopt them at
the same time as the provisions addressed by Revision Checklist 78.
2) This checklist may be subject to change in the future. EPA's State Programs Branch is
currently discussing the relationship of hazardous waste injection issues to the State authorization
program. In question are the changes made to 40 CFR Part 148 by the final rule addressed by
this checklist and whether they should be included In the checklist This present checklist does
not include these changes.
3) The checklist is in HSWA Cluster II, with the exception of the clarifying amendment to
§261.33(c) which is in non-HSWA Cluster VI. This clarification Is not immediately effective in
authorized States since the requirements are not imposed pursuant to HSWA. Thus, these
requirements are applicable only in those States that do not have interim or final authorization. In
authorized States, the requirements will not be applicable until the State revises its program to
adopt equivalent requirements under State law.
4) The following Part 268 sections are not delegabte to States because of the national concerns
which must be examined when decisions are made relative to them: 268.5 (case-by-case effective
date extensions); 268.42(b) (application for alternate treatment method); and 268.44 (variance from
a treatment standard). "No migration" petitions under 268.6 will be handled by EPA, even though
States may be authorized to grant such petitions in the future. States have the authority to grant
such petitions under RCRA Section 3006 because such decisions do not require a national
perspective, as is the case for decisions under 268.5, 268.42(b) or 268.44. However, EPA has
had few opportunities to implement the land disposal restrictions and expects to gain valuable
experience and information from reviewing "no-migration" petitions.
5) In the past, the nondetegabte sections/paragraphs of the LDR regulations have been omitted
from the LOR checklists because States could not assume the authority for them. However, this
procedure has led to confusion among the States on how to handle the sections/paragraphs in
their code. For this reason, the Agency has decided to include these nondetegable sections on
the LDR checklists. To differentiate these sections from the detegabte portions of the LDR
restrictions, asterisks precede (a single row) and follow (a double row) each non-delegable section.
If States have already filled out a version of Revision Checklist 78 which does not include the
nondetegable sections, they need not fill out a revised version containing these sections. This
change in format was made only to improve clarity.
June 1, 1990 - Page 1 of 28 ocuss
-------
SPA 9
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
The Agency suggests that States incorporate the nondelegable portions of the LDR regulation into
their regulations. It is essential, however, that States leave the terms "Administrator", "Federal
Register" and "Agency" unchanged, i.e., States may not substitute analogous State terms for these
Federal terms. Similarly, States incorporating by reference must be careful to exclude these
sections from blanket substitutions of State terms for Federal terms. For a more complete
discussion of issues surrounding nondelegable sections, see Appendix J of the State Authorization
Manual (SAM).
6) Note that while 268.40 is delegable to States, "Administrator* in the following phrase
"Approved by the Administrator under the procedures set for this in 268.42(b)" should not be
replaced with an analogous State term because it is referring to decisions under 268.42(b). Such
decisions will be made by the EPA Administrator.
7) States which have not submitted any land disposal restrictions are strongly encouraged to use
the Consolidated Land Disposal Restriction Checklist rather than the seven individual revision
checklists.
8) Note that the Toxicity Characteristic Leaching Procedure (TCLP) referred to by the Third Third
Scheduled Waste Rule is the TCLP entered into the Federal code at 40 CFR 261 Appendix II by
the Toxicity Characteristic Rule (55 FR 11798, March 29, 1990) and amended at 55 FR 26986
(June 29, 1990). (Both the Toxicity Characteristic Rule and the June amendment are addressed
by Revision Checklist 74.) The TCLP procedure previously located at 40 CFR Part 268, Appendix
i and introduced by the Solvents and Dioxins Land Disposal Restrictions Rule (51 FR 40572;
November 7, 1986; Revision Checklist 34) is the outdated version of the TCLP. Thus, States
adopting the Third Third Scheduled Waste Rule must also adopt the new version of the TCLP.
The Revision Checklist 34 version of the TCLP should be removed from their code as well.
9) Guidance regarding the use of the new TCLP versus the EP Toxicity Test may be found at 55
FR 22660 (June 1, 1990). The code (40 CFR 268.40(a) and 268.41 (a)) addressing this issue
contains a serious technical error which is discussed In Footnote 11 found at th d of this
checklist.
10) Adopting the alternate treatment standards for lab packs Is optional. However, if a State
chooses to adopt these alternate standards, all of the requirements related to these standards
must be adopted, including all of the provisions added by the Third Third Scheduled Waste Rule
(i.e., Revision Checklist 78) at 264.316(1), 265.316(1), 288.7(a)(7), 288.7(a)(8), 268,42(e),
268.42(c)(1)-(4), and Appendices IV and V to Part 268.
June 1, 1990 • Page 2 of 28 ocL7s,s -12*91
•• * ..
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OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
'Stiff ATOLWTg!
EDOI^"
ALENT
MORE BROADER
STRINGENT IN SCOPE
PART 261 - IDENTIFICATION AND LISTING OF HAZARDOUS WASTE
SUBPART C - CHARACTERISTICS OF HAZARDOUS WASTE
GENERAL
remove ", but is not
listed as a hazardous
waste in Subpart D";
change "the EPA"
to "every EPA";
insert "that is
applicable as"
before "set forth";
remove "In the
respective charac-
teristic" before "in
this Subpart"; before
"recordkeeping",
change "certain" to
"all applicable"
261.20(b)
CHARACTERISTIC OF IGNITABILITY
remove ", but is
not listed as a
hazardous waste
in Subpart D,"
261.2Kb)
CHARACTERISTIC OF CORROSIVITY
remove ", but is
not listed as a
hazardous waste
in Subpart D,"
261.22(b)
CHARACTERISTIC OF REACTIVITY
remove ", but is
not listed as a
hazardous waste
in Suboart D."
261.23(b)
June 1, 1990 - Page 3 of 28
DCL78.9 -12/9/91
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RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
SPA 9
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINQ1NT
BROADER
IN SCOPE
CHARACTERISTIC OF EP TOXICITY
remove ", but is
not listed as a
hazardous waste
in Subpart D."
261.24(b)
SUBPART D - LISTS OF HAZARDOUS WASTES
HAZARDOUS WASTES FROM NON-SPECIFIC SOURCES
add the waste
code "F039" to list
in alphanumeric
order to list as
specified below
261.31
Industry and EPA hazardous
waste No.
Hazardous waste
Hazard
code
F039.
Leachate resulting from the treatment, storage,
or disposal of wastes classified by more than
one waste code under Subpart D, or from a mixture
of wastes classified under Subparts C and D of
this part. (Leachate resulting from the manage-
ment of one or more of the following EPA Hazardous
Wastes and no other hazardous wastes retains its
hazardous waste code(s): F020, F021, F022,
F023, F026, F027, and/or F028.).
(T)
DISCARDED COMMERCIAL CHEMICAL PRODUCTS, OFF SPECIFICATION SPECIES,
CONTAINER RESIDUES. AND SPILL RESIDUES THEREOF
1 insert "or (f)"
after "(e)";
change "261 .7(b)(3)"
to "261 .7(b)"
261,33(c)
June 1, 1990 - Page 4 of 28
DCL78.8 -12/8/81
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OSWER DIR. NO. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
SlArfe ANALOQ IS:
EQUIV-
ALENT
MORE BROADER
STRINGENT IN SCOPE
APPENDIX VII TO PART 261
BASIS FOR LISTING HAZARDOUS
add "F039" to list
in alphanumeric order
as shown below:
Appendix
WASTE
VII
EPA hazardous
waste No.
Hazardous constituents for
which listed
F039.
.All constituents for which treatment
standards are specified for multi-source
leachate (wastewaters and non-
wastewaters) under 40 CFR 268.43(a),
Table CCW.
June 1, 1990 - Page 5 of 28
DCL78.8 -12/9/91
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RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
SPA 9
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUltf- 1
ALENT 1
MORE I BROADER
STRINGENT | IN SCOPE
PART 262 - STANDARDS APPLICABLE TO GENERATORS OF
HAZARDOUS WASTE
SUBPART A - GENERAL
HAZARDOUS WASTE DETERMINATION
in the first sentence,
replace "If with
"For purposes
of compliance with
40 CFR Part 268, or
if; remove "as a
hazardous waste"
after "listed"; replace
"of 40 CFR Part 261"
with "of this part";
replace "he must
determine" with
"the generator must
then determine"
262.1 1(c)
SUBPART C - PRE-TRANSPORT REQUIREMENTS
ACCUMULATION TIME
replace "and with
§265.16" with
", with §265.16,
and with 40 CFR
268,7(aH4)"
262.34(a)(4)
June 1, 1990 - Page 6 of 28
DCL78.9 -12/9/91
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SPA 9
RCRA REV'SiON CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS ^
STATE CITATION
STATE ANAL5S 15:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
SUBPART M - LAND TREATMENT
SPECIAL REQUIREMENTS FOR IGNITABLE OR REACTIVE WASTES
insert "the waste and
the treatment zone
meet all applicable
requirements of
40 CFR Part 268, and"
after "unless"
264.281
SUBPART N - LANDFILLS
SPECIAL REQUIREMENTS FOR IGNITABLE OR REACTIVE WASTES
replace "in treated,
rendered, or mixed
before or immediately
after placement in a
landfill so that:" with
"and landfill meet all
applicable requirements
of Part 268, and:"
begin the first
sentence with "Except
for prohibited wastes
which remain subject
to treatment standards
in Subpart D of
Part 268,"
264.31 2(a)
264.31 2{b)
:
t,2
DISPOSAL OF SMALL CONTAINERS OF HAZARDOUS WASTE IN OVERPACKED
DRUMS (LAB PACKS)
add new paragraph
regarding disposal in
compliance with Part
268; requirement for
fiber drums to meet
DOT specifications
and 264.31 6(b)
requirements if
incinerate lab packs
264.31 6(f)
June 1, 1990 - Page 8 of 28
DCL78.S -12/8/91
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OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATS ANALOG IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
PART 265 - INTERIM STATUS STANDARDS FOR OWNERS AND OPERATORS OF
HAZARDOUS WASTE TREATMENT, STORAGE AND DISPOSAL FACILITIES
SUBPART A - GENERAL
PURPOSE. SCOPE. AND APPLICABILITY
replace "Part 268" with
"40 CFR Part 268, and
the 40 CFR Part 268
standards are
considered material
conditions or
requirements of the
Part 265 interim
status standards"
265.1(e)
SUBPART B - GENERAL FACILITY STANDARDS
GENERAL WASTE ANALYSIS
revise comment
following subparagraph
(a) (2) as follows:
remove "or all" after
"supply part"; add
", except as otherwise
specified in 40 CFR
268.7(b) and (c)."
to the second
sentence
265.1 3(a)(2)
SUBPART K - SURFACE IMPOUNDMENTS
SPECIAL REQUIREMENTS FOR IGNITABLE OR REACTIVE WASTE
insert "the waste
and impoundment
satisfy all applicable
requirements of
40 CFR Part
268, and"
after "unless"
265.229
June 1, 1990 - Page 9 of 28
DCL78.9 -12/9/91
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SPA 9
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
FoUNT
AL1NT
MORE
STfMNQENT
BROADER
IN SCOPE
SUBPART L - WASTE PILES
SPECIAL REQUIREMENTS FOR IGNITABLE OR REACTIVE WASTE
insert "the waste and
pile satisfy all
applicable requirements
of 40 CFR Part 268,
and" after "unless"
265,256
SUBPART M - LAND TREATMENT
SPECIAL REQUIREMENTS FOR IGNITABLE OR REACTIVE WASTES
insert "the waste and
treatment zone meet
all applicable require-
ments of 40 CFR
Part 268, and" after
"unless"
265.281
SUBPART N - LANDFILLS
SPECIAL REQUIREMENTS FOR IGNITABLE OR REACTIVE WASTES
replace "is treated,
rendered, or mixed
before or immediately
after placement in a
landfill so that:" with
"and landfill meet all
applicable requirements
of 40 CFR 268, and:"
begin the first
sentence with "Except
for prohibited wastes
which remain subject
to treatment standards
in Subpart D of
Part 268,"
265.312(a)
265.31 2(b)
June 1, 1990 - Page 10 of 28
DCL78.S -13/W91
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OSWER DIR. No. 9541.00-14
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Thin! Scheduled Wastes (cont'd)
SPA 9
t,2
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
DISPOSAL OF SMALL CONTAINERS OF HAZARDOUS WASTE IN OVERPACKED
DRUMS (LAB PACKS)
add new paragraph
regarding disposal in
compliance with Part
268; requirement for
fiber drums to meet
DOT specifications
and 264.31 6(b)
requirements if
incinerate lab packs
265.31 6(f)
PART 268 - LAND DISPOSAL RESTRICTIONS
SUBPART A - GENERAL
PURPOSE. SCOPE AND APPLICABILITY
wastes that are
hazardous only
because they exhibit
a hazardous charac-
teristic, and which
are otherwise
prohibited from
land disposal
if the wastes:
disposed into
a nonhazardous
or hazardous injection
well as defined in
40 CFR 144.6(a)
do not exhibit
any prohibited
characteristic of
hazardous waste at
the point of injection
paragraph
removed
268.1(cM3)
268.1 (c)(3)(i)
268.1 (c)(3Mii)
268.1(c)(5)
June 1, 1990 - Page 11 of 28
DCL78.9 -12/9/91
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RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
SPA 9
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
JsIA^E ANALOQ IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
DEFINITIONS APPLICABLE TO THIS PART
new introductory
paragraph for
definitions
redesignate
"halogenated organic
compounds" or "HOCs"
as 268.2(a)
4 redesignate
"hazardous constituent
or constituents"
as 268.2(b)
5 redesignate "land
disposal" as 268.2(c)
6 add
"nonwastewaters"
7 redesignate
"polychlorinated
biphenyis" or "RGBs"
as 268.2(e)
add
"wastewaters" and
the following
exceptions:
"F001, F002, F003
F004, F005 solvent-
water mixtures"
"K011, K013, K014
wastewaters"
"K103 and K104
wastewaters"
add "inorganic solid
debris"; specific
inorganic or metal
materials:
metal slaas
classified slaa
alass
concrete
268.2
268.2(a)
268.2{b)
268.2(c)
268.2(d)
268.2(6)
268.2(f)
268.2ff)m
268.2(f)(2)
268.2(M3)
268.2(a)
268.2(a)(1)
268.2(aX2)
268.2(a)(3)
268.2(a)(4)
«
June 1, 1990 - Page 12 of 28
DCL78 9 -12/9/91
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OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
masonry and
refractory
bricks
metal cans,
containers,
drums or tanks
metal nuts, bolts,
pipes, pumps, valves,
appliances, or
industrial equipment
scrap metal as
defined in
40 CFR261.1(c)(6)
FEDERAL RCRA CITATION
268.2(a)(5)
268.2(a)(6)
268.2(a)(7)
268.2(Q)(8)
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
DILUTION PROHIBITED AS A SUBSTITUTE FOR TREATMENT
8 begin sentence with
"Except as provided
in paragraph (b)
of this section,"
new paragraph;
permissible forms
of dilution related
to Sections 307 or
402 of the CWA
268.3(a)
268,3(W
WASTE ANALYSIS AND RECORDKEEPING
revise section to
include more guidance
on specifying treat-
ment standards
revise section to
include more
guidance on
specifying treatment
standards
9 revise section to
include more guidance
on specifying treat-
ment standards
268.7«M1Mii)
268.7(a)(2)(i)(B)
268.7(a)(3){ii)
June 1, 1990 • Page 13 of 28
DCL78.9 -12/8/91
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SPA 9
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
replace entire
paragraph with new
requirements for
the development of
a waste analysis
plan and record-
keeping requirements
when treating in
262.34 tanks/con-
tainers; other
requirements:
what the waste
analysis plan must be
based on and contain
requirements for
filing of waste
analysis plan
compliance with
268.7(a)(2)
notification
requirements for
wastes shipped
off-site
remove
suboaraaraDh
notification for a
generator managing
a lab pack that
contains wastes
identified in
Appendix IV if use
alternate treatment
standards under
268,42;
268.7(a}(5)&(6)
compliance;
certification
FEDERAL RCRA CITATION
268.7(a)(4)
268.7(aM4)(i)
268.7(aM4)(H)
268.7(aK4)(iii)
268,7(aM4)(iv)
268.7(a)(7>
ANALOGOUS
STATE CITATION
STATE ANALOG (S:
EQUIV-
ALENT
MORE
STRINQENT
BROADER
IN SCOPE
t,2
June 1, 1990 - Page 14 of 28
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SPA 9
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
notice for a
generator managing
a lab pack that
contains organic
wastes specified in
Appendix V if use
alternate treatment
standard under
268.42;
268.7(a)(5)&(6)
compliance; certi-
fication
notification and
certification
requirements for
small quantity
generators with
tolling agreements
pursuant to
40 CFR 262.20(6)
revise section to
include more guidance
on specifying treat-
ment standards
insert "impermissible"
in front of "dilution"
in the certification
paragraph
certification require-
ments for wastes with
treatment standards
expressed as concen-
trations in the
waste pursuant to
268.43
remove paragraph
268.7(b)(7) and
redesignate
268.7(b)(8)
as 268.7(b)(7)
FEDERAL RCRA CITATION
268.7(a)(8)
268.7(a)(9)
288.7(bH4Hli)
268.7(bH5Mi)
288.7(b)(5Hili)
268.7(b)(7)
ANALOGOUS
STATE CITATION
STATE ANALoS IS:
"EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
t,2
10
June 1, 1990 - Page 15 of 28
DCL78.9 -12/9/91
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SPA 9
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
begin the paragraph
with "Except where
the owner or operator
is disposing of any
waste that is a
recyclable material
used in a manner
constituting disposal
pursuant to
40 CFR 266.2Q(W,"
remove paragraph
remove paragraph
FEDERAL RCRA CITATION
268.7{c)
268.7(eM3)
268.7(c)(4)
ANALOGOUS
STATE CITATION
STA™ ANALOG is:
E5J31V-
ALENT
MORE
STRINGENT
BROADER
IN SCOPi
LANDFILL AND SURFACE IMPOUNDMENT DISPOSAL RESTRICTIONS
insert
"As of May 8, 1990,
this section is
no longer in effect"
at the end of the
paragraph
268.8(a)
SPECIAL RULES REGARDING WASTES THAT EXHIBIT A CHARACTERISTIC
determination of
applicable treatment
standards under
Subpart D of Part 268
by initial generator
of a solid waste;
code designation
268.9(3)
June 1, 1990 - Page 16 of 28
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OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 78; Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
the treatment standard
for the waste code
listed in 40 CFR
Part 261, Subpart D
will operate for wastes
both listed under
Subpart D, Part 261
and exhibit a
characteristic under
Subpart C,
Part 261 ; conditions
under which treatment
standards for ail
applicable listed and
characteristic waste
codes must be met
no prohibited waste
which exhibits a
characteristic under
40 CFR Part 261 ,
Subpart C may be
land disposed unless
waste complies with
Part 268, Subpart D
treatment standards
wastes that exhibit
a characteristic are
subject to all 268.7
requirements unless
wastes are no longer
hazardous; if not
hazardous, notification/
certification sent to
EPA Regional
Administrator or
authorized State
information needed
with each notification
FEDERAL RCRA CITATION
268.9(W
268.9fc)
268.9(d)
268,9{d){1)
288.9(d)(1)m
268.9(d)(1)fii)
268.9(dH1)(iii)
ANALOGOUS
STATE CITATION
STAT6 ANALOG IS:
EQUIV-
ALENT
MORi
STRINGENT
BROADER
IN SCOPE
June 1, 1990 - Page 17 of 28
DCL78.9 -12/8/91
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SPA 9
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
certification signed
by authorized
representative stating
language found in
268.7(b)(5Hi)
FEDERAL RCRA CITATION
268.9(d)(2)
ANALOGOUS
STATE CITATION
STAIE ANAUOU is:
EQUIV-
ALENT
MORE BROADER
STRINGENT IN SCOPE
SUBPART C - PROHIBITIONS ON LAND DISPOSAL
WASTE SPECIFIC PROHIBITIONS - THIRD THIRD WASTES
effective August 8,
1990, prohibition
from land disposal of
certain wastes
specified in
261,31, 261.32,
261.33{e) and 261.33(f)
effective November 8,
1990, prohibition
from land disposal
of certain wastes
specified in 261.32
effective May 8, 1992,
prohibition from land
disposal of certain
wastes specified in
261.31, 261.32,
261.33(6), 261.33(f),
certain characteristic
wastes, inorganic
debris defined in
268.2(a}(7), and RCRA
hazardous wastes
containing naturally
occurring radioactive
materials
effective May 8, 1992,
prohibition from land
disposal of 268.1 2
mixed radioactive/
hazardous wastes
268.35(a)
268.35(W
268.35(c)
268.35W)
June 1, 1990 - Page 18 of 28
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OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
effective May 8, 1992,
prohibition from land
disposal of wastes
specified in 268.35
as having Subpart D,
Part 268 treatment
standards based on
incineration, mercury
retorting, or vitri-
fication, and which
are contaminated
soil or debris
between May 8, 1990,
and August 8, 1 990,
wastes included in
paragraph 268.35(a)
may be disposed of in
a landfill or surface
impoundment only if
such unit is in
compliance with
268.5{h)(2)
between May 8, 1990,
and November 8,
1990, wastes included
In paragraph
268.35(b) may be dis-
posed of in a landfill
or surface impound-
ment only if such unit
is in compliance with
268.5(h)(2)
between May 8, 1990,
and May 8, 1992,
wastes included in
paragraphs 268.35(c),
(d) and (e) may be
disposed of in a
landfill or surface
impoundment only if
such unit is in
compliance with
268.5(h((2)
FEDERAL RCRA CITATION
268.35(6)
268.35(f)
268.35(0)
268.35(h)
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINQENT
BROADER
IN SCOPE
June 1, 1990 - Page 19 of 28
DCL78.9 -12/9/81
JLt
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RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
SPAS
FEDERAL REQUIREMENT
conditions under
which requirements
of paragraphs
268.35(a), (b), (c) (d)
and (e) do not apply
wastes meet appli-
cable 268 Sub-
part D standards
persons granted
exemption under 268.6
wastes meet
applicable alternate
standards under
268.44
persons granted
extension to the
effective date
of a prohibition
under 268.5
testing of waste
to determine if
268.10, 268.11 and
268.12 wastes exceed
applicable treatment
standards specified
in 268.41 and 268.43;
consequences of
exceed! nq standards
FEDERAL RCRA CITATION
268.35(f)
268.35(0(1)
268.35{IH2)
268.35(i)(3)
268.35(i)(4)
268.35(i)
ANALOGOUS
STATE CITATION
STAT1 ANALOG IS:
EoTJIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
SUBPART D - TREATMENT STANDARDS
11
APPLICABILITY OF TREATMENT STANDARDS
revise paragraph
by adding the
exception for
certain wastes that
may be land disposed
if test methods
in Appendix 1, Part
268 or Appendix il,
Part 261 methods
are used
268.40(a)
June 1, 1990 - Page 20 of 28
DCL78.9 -12/9/91
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OSWER DIR. No. 9541.00-14
SPA 9
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
begin the paragraph
with "Except as
otherwise specified
in §268.43(cL"
FEDERAL RCRA CITATION
268.40(c)
ANALOGOUS
STATE CITATION
STATE ANAL5S 15:
r EQUI\T
ALENT
MORE
STRINQENT
BROADER
IN SCOPE
TREATMENT STANDARDS EXPRESSED AS CONCENTRATIONS IN WASTE EXTRACT
revise paragraph
by adding the
exception for
certain wastes that
Table CCWE identifies
and whose
constituents are
extracted using
test methods
In Appendix 1, Part
268 or Appendix II,
Part 261; compliance
based on grab
samples
replace Table CCWE
with new table
as shown on pages
22690 through 22692
of this final rule
268.41 (a)
268.41 (a)/
Table CCWE
11
TREATMENT STANDARDS EXPRESSED AS SPECIFIED TECHNOLOGIES
treatment of wastes
identified in
268.42(a)(1)&(2) with
technology specified
in those sub-
paragraphs and in
Table 1 of 268.42
insert "40 CFR" in
front of "Part 264"
and "Part 265";
remove "or in boilers
or industrial furnaces
burning in accordance
with applicable
regulatory standards"
remove paragraph
268.42(a)
268.42(a)(2)
268.42(aU3)
June 1, 1990 - Page 21 of 28
DCL78.9 -12/9/91
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SPA 9
RCRA REVISION CHECKLIST 78; Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
FEDERAL REQUIREMENT
remove oaraaraoh
add new
Table 1 addressing
Technology Codes and
Description of
Technology-Based
Standards as
shown on pages
22693 and 22694 of
this final rule
add new table on
Technology-Based
Standards by RCRA
Waste Code as shown
on pages 22694
through 22700 of this
final rule
add new table on
Technology-Based
Standards for Specific
Radioactive Hazardous
Mixed Waste as
shown on page 22700
of this final rule
FEDERAL RCRA CITATION
268.42(a){4)
268.42(a)/Table 1
268.42(a)/Table 2
268.42(aVTable 3
ANALOGOUS
STATE CITATION
5TAT1 ANAL05 I§:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
Guidance note: 268.42 is NOT DELEGABLE. States should see Note 5 at the beginning of this
checklist regarding how to incorporate this paragraph into their code.
replace
"paragraph (a)" with
"paragraphs (a), (c),
and (d)" in two places
268.42(b)
t.2 ALTERNATE TREATMENT STANDARDS FOR LAB PACKS
conditions for
eligibility of
lab packs for
land disposal:
268.42(c)
June 1, 1990 - Page 22 of 28
DCL78.9 -12/9/91
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RCRA REVISION CHECKLIST 78; Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
SPA 9
FEDERAL REQUIREMENT
compliance of
lab packs with
applicable
provisions of
264.316 and 265.316
Part 268 Appendix IV
and Appendix V
hazardous wastes
contained in
lab packs
incineration of
lab packs in
accordance with
Part 264, Subpart O
and Part 265,
Subpart O
requirements
treatment standards
for incinerator
residues from lab
packs containing
D004, D005, D006,
D007, D008, D010
and D011
FEDERAL RCRA CITATION
268.42(c)f1)
268.42(cM2)
268,42(eM3)
268.42{c)(4)
ANALOGOUS
STATE CITATION
STATl ANAL5Q IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
12
radioactive
hazardous mixed
wastes with
Table 3 treatment
standards not
subject to 268.41,
268.43 or Table 2
treatment standards;
radioactive
hazardous mixed
wastes not subject
to Table 3 treatment
standards remain
subject to 268.41,
268.43 and Table 2
treatment standards
268.42W)
June 1, 1990 - Page 23 of 28
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RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
SPA 9
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPi
TREATMENT STANDARDS EXPRESSED AS WASTE CONCENTRATIONS
replace the last
sentence with
"Compliance with
these concentrations
is required based
upon grab samples,
unless otherwise
noted in the
following Table CCW
replace Table CCW
with new table
as shown on pages
22701 through 22713
of this final rule
conditions for
demonstrating
compliance with
treatment standards
for organic
constituents
provided:
treatment for
organic constituents
established based on
incineration in units
operated in accor-
dance with Subpart O
requirements of Part
264 or Part 265 or
based on combustion
in fuel substitution
units in accordance
with applicable tech-
nical requirements
organic constituents
treated using
paragraph
268.43(c)(1) methods
good-faith efforts
fail to detect the
organic constituents;
when such efforts
must be demonstrated
268.43(a)
268.43(a)/Table CCW
268.43(c)
268.43(cM1)
268.43(c>{2)
268.43(c)(3)
June 1, 1990 - Page 24 of 28
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OSWER DIR. No. 9541.00-14
RCRA REVISION CHECKLIST 78; Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
SPA 9
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STAlfc ANALOG IS:
EQlW-
ALENT
MORi
STRINGENT
BROADiH
IN SCOPE
APPENDIX IV TO PART 268
t,2 ORGANOMETALLIC LAB PACKS
add Appendix IV
as shown on page
2271 3 of this final
rule
Appendix IV
APPENDIX V TO PART 268
ORGANIC LAB PACKS
add Appendix V
as shown on pages
22713 and 22714 of
this final rule
Appendix V
APPENDIX VI TO PART 268
RECOMMENDED TECHNOLOGIES TO ACHIEVE DEACT1VAT1ON OF CHARACTERISTICS IN
SECTION 268.42
add Appendix VI
as shown on pages
22714 and 22715 of
this final rule
Appendix VI
APPENDIX VII TO PART 268
EFFECTIVE DATES OF SURFACE DISPOSED WASTES REGULATED LDRs
(COMPREHENSIVE LIST)
add Appendix VII
as shown on pages
22715 through 22718
of this final rule
Appendix VII
June 1, 1990 - Page 25 of 28
DCL78.9 -12/W91
,
w t,
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RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
SPA 9
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
APPENDIX VIII TO PART 268
NATIONAL CAPACITY LDR VARIANCES FOR UIC WASTES (COMPREHENSIVE LIST)
add Appendix VIII
as shown on pages
22718 and 22719 of
this final rule
Appendix VIII
PART 270 - EPA-ADMINISTERED PERMIT PROGRAMS; THE HAZARDOUS
WASTE PERMIT PROGRAM
SUBPART D - CHANGES TO PERMIT
PERMIT MODIFICATION AT THE REQUEST OF THE PERMITTEE
13 CLASSIFICATION OF PERMIT MODIFICATION
redesignate old
B(1)(b) as B(1)(c)
and add new item
involving F039
under General
Facility Standards
as shown below
270.42,
Appendix I
Modifications
Class
B. General Facility Standards
1. *
b. To incorporate changes associated
with F039 (multi-source teachate)
sampling or analysis methods
June 1, 1990 • Page 26 of 28
DCL78 9 -12/9/91
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OSWER DIR. No. 9541.00-14
RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (eont'd)
SPA 9
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPE
1
8
Unlike the other changes addressed by this checklist, the change to 261.33(c) is not imposed
pursuant to HSWA. Thus, this change is placed in non-HSWA Cluster VI.
This code is part of the optional requirements for the alternate treatment standards for tab packs
under the Third Third Scheduled Waste Rule. If adopted, ail of the requirements (I.e.,
264.316(f), 265.316(1), 268.7(a)(7), 268.7(a)(8), 268.42(c), 268.42(c)(1)-(4), and Appendices IV
and V to Part 268) related to these alternate treatment standards must be adopted.
This is a new subparagraph introduced into the code by Revision Checklist 78. The original
subparagraph 268.1 (c)(3) was introduced by Revision Checklist 34, modified by Revision
Checklist 39, then removed by Revision Checklist 50, with 268.1(c)(4) redesignated as (c)(3).
The redesignated subparagraph 268.1 (c)(3) was subsequently removed by Revision Checklist 66.
This paragraph was originally part of 268.2(a) when it was entered into the code by Revision
Checklist 34. Revision Checklist 78 renumbered it as 268.2(b) and removed the old 268.2(b)
Introduced by Revision Checklist 34,
The definition of land disposal was introduced into the code as part of 268.2(a) by Revision
Checklist 34. It was modified by Revision Checklist 39 and designated as 268.2(c) by Revision
Checklist 78.
Note there is a typographical error in the Federal Register notice for Revision Checklist 78 (55
FR 22520, June 1, 1990). The reference to "(g)(6)" should be to "(f)."
This definition was introduced by Revision Checklist 39 as part of 268.2(a). it was,redesignated
as 268.2(e) by Revision Checklist 78.
Paragraph 268.3(a) was originally introduced into the code by Revision Checklist 34 as 268.3,
and was then revised by Revision Checklist 39. Revision Checklist 78 revised and redesignated
it as 268.3(a).
Note that on page 22687 of the final rule addressed by this checklist, It appears that
268.7(a)(3)(iii)-(v) were removed. This is an error and these three subparagraphs should remain
in the code.
10
11
This paragraph was originally 268.7(b)(8) when it was entered into the code by Revision
Checklist 50, but it was redesignated as 268.7(b)(7) by Revision Checklist 78 because the old
278.7(b)(7) and 278.7(b)(7)(i)-(iv) were removed by Revision Checklist 78. Revision Checklist
66 corrected 268.7(b)(8) before it was redesignated by Revision Checklist 78.
The current text of 268.40(a) and 268.41 (a) indicates that an extract or treatment residue of
certain wastes may be land disposed only if certain requirements are met using either the test
method in Appendix I of Part 268 or the test method in Appendix II of Part 261. Following
promulgation of the March 29, 1990 Toxicity Characteristics rule addressed by Revision
Checklist 74 (55 FR 11798, as amended at 55 FR 26986), both of these appendices relate to
June 1, 1990 - Page 27 of 28
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RCRA REVISION CHECKLIST 78: Land Disposal Restrictions for
Third Third Scheduled Wastes (cont'd)
SPA 9
FEDERAL REQUIREMENT
FEDERAL RCRA CITATION
ANALOGOUS
STATE CITATION
STATE ANALOG IS:
EQUIV-
ALENT
MORE
STRINGENT
BROADER
IN SCOPi
12
13
the same test method, the TCLP. Previously, the Part 261 appendix contained the EP Toxicity
test procedures while the Part 268 appendix contained the TCLP. EPA will issue a correction
to the rule for these particular paragraphs in the near future, clarifying which procedures may
be used. Until such time, however, EPA indicates that for the specific waste exceptions listed
In these paragraphs the TCLP can be used for measuring compliance with the treatment
standards for those specified wastes, and, If the extract or treatment residue fails that test, the
EP Toxicity test can be used. If the extract or residue passes that less stringent test, then
such waste is considered in compliance with the treatment standards. For more information
related to the use of either of the two test methods, see the discussion at 55 FR 22660 (June
1, 1990).
The 55 FR 22520, June 1, 1990, code incorrectly states that a subparagraph 268.42(e) is
added. The Federal Register did not contain a 268.42{e); it only added 268.42(d).
Appendix I was introduced by Revision Checklist 54 as an optional modification to section
270.42. Changes to this appendix addressed by Revision Checklist 78 are relevant only if a
State has modified its code to include Appendix I as per Revision Checklist 54.
June 1, 1990 - Page 28 of 28
DCL78.9 -12/9/91
M
i.JL
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= ES
OSWER DIR. NO. 9541.00-1A
Friday
June 1, 1990
Part II
Environmental
Protection Agency
40 CFR Part 148 et al. .
Land Disposal Restrictions for Third
Third Scheduled Wastes; Rule
-------
22520 Federal Register /Vol. 55. No. 106 / Friday, June 1, 1990 / Rules and Regulations
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Parts 148, 281, 262, 264, 265,
258, 270, 271, and 302
[EPA/OSW-FR-90-010;SWH-FRL-3751-1J
KIN 2050-AC73
Land Disposal Restrictions for Third
Third Scheduled Wastes
AGENCY: Environmental Protection
Agency (EPA).
ACTION: Final rule.
SUMMARY: The Environmental Protection
Agency (EPA) today is promulgating
regulations implementing the last of five
Congressionally mandated prohibitions
on land disposal of hazardous wastes
(the third one-third of the schedule of
restricted hazardous wastes, hereafter
referred to as the Third Third). This
action is taken in response to
amendments to the Resource
Conservation and Recovery Act
(RCRA), enacted in the Hazardous and
Solid Waste Amendments (HSWA) of
1984. When fully effective in May 1992,
this rule, combined with the previous
rulemakings, is expected to require
treatment of a total of seven million tons
of hazardous waste managed in RCRA-
regulated facilities.
EFFECTIVE DATE: This final rule is
effective on May 8,1990. .
ADDRESSES: The official record for this
rulemaking is identified as Docket .
Number F-90-LD13-FFFFF, and is
located in the EPA RCRA Docket, room
2427,401 M Street SW., Washington. DC
20460. The docket is open from B a.m. to
4 p.m., Monday through Friday, except
on Federal holidays. The public must
make an appointment to review docket
materials by calling (202) 475-9327. The
public may copy a maximum of 100
pages from any regulatory document at
no cost. Additional copies cost $.15 per
page.
FOB FURTHER INFORMATION CONTACT:
For general information contact the
RCRA Hotline at: (800) 424-9346 (toll-
free) or (202) 382-3000 locally.
For information on specific aspects of
this final rule, contact Richard Kinch or
Rhonda Craig, Office of Solid Waste
(OS-333), U.S. Environmental Protection
Agency, 401 M Street SW., Washington,
DC 20460, (202) 382-7917. For specific
information on BOAT treatment
standards, contact Larry Rosengrant,
Office of Solid Waste (OS-322), U.S.
Environmental Protection Agency. 401 M
Street SW., Washington, DC 20460, (202)
382-7917. For specific information on the
Underground Injection Control Program
and hazardous waste injection wells,
contact Bruce Kobelski, Office of
Drinking Water (WH-550), U.S.
Environmental Protection Agency, 401 M
Street SW., Washington, DC 20460, (202)
382-7275. For specific information on
capacity determinations or national
variances, contact Jo-Ann Bassi, Office
of Solid Waste (OS-322), U.S.
Environmental Protection Agency, 401 M
Street SW., Washington, DC 20460, (202)
475-6673.
SUPPLEMENTARY INFORMATION:
Expanded Summary
Today's notice promulgates specific
treatment standards and effective dates
for the Third Third wastes, "soft
hammer" First and Second Third
wastes, and five newly listed wastes.
Today's notice also promulgates
treatment standards and effective dates
for multi-source leachate and mixed
radioactive/hazardous wastes, which
were re-scheduled to the Third Third.
The Agency has also re-scheduled
wastes from the petroleum refining
industry, EPA Hazardous Waste Nos.
K048-K052. to the Third Third, is
revising the treatment standards for
these wastes, and is granting a six-
month national capacity variance for
K048-K052 nonwastewaters. The .
Agency is also promulgating alternate
treatment standards for lab packs.
The Agency is also promulgating
treatment standards and effective dates
for hazardous wastes that exhibit one or
more of the following characteristics:
Ignitibility, corrosivity, reactivity or EP
toxiciry (40 CFR 261.21-261.24). The
Agency has revised the proposed
treatment standards for these wastes to
reflect data submitted during the
comment period showing wide
variability in the wastestreams. Today's
final rule establishes treatment
standards for the characteristic wastes
in one of four forms: (1) A concentration
level equal to, or greater than the
characteristic level; (2) a concentration
level less than the characteristic level;
(3) a specified treatment technology
which in many cases will result in
treatment below the characteristic level;
or (4) a treatment standard of
"deactivation" to remove the
characteristic, with guidance on
technologies the Agency believes will
remove the characteristics (see
appendix VI to part 268).
In promulgating treatment standards
for characteristic wastes, EPA has
evaluated the applicability of certain
provisions of the land disposal
restrictions' framework with respect to
characteristic wastes including wastes
regulated under the National Pollutant
Discharge Elimination System (NPDES)
program, sections 307(b) and 402 of the
Clean Water Act (CWA) and the Safe
Drinking Water Act (SDWA) programs
regulating deep well injection to ensure
successful integration of these programs
with the regulations being promulgated
today. Specifically, the Agency
considered the appropriateness of the
dilution prohibition for each of the
characteristic wastestreams, and the
applicability of treatment standards
expressed as specified methods.
In general, the Agency believes that
the mixing of waste streams to eliminate
certain characteristics is appropriate
and should be permissible for certain
characteristic waste streams (e.g.. most
wastes that are purely corrosive).
Furthermore, EPA believes that the
dilution prohibition should not apply to
characteristic wastes that are managed
in treatment trains regulated under the
Pretreatment and National Pollutant
Discharge Elimination System (NPDES)
programs under sections 307(b) and 402
of the CWA or in Class I underground
injection well systems regulated under
the Safe Drinking Water Act (SDWA).
The Agency believes that the treatment
requirements and associated dilution
rules under the CWA are generally
consistent with the dilution rules under
RCRA, and that the Agency should rely
on the existing CWA provisions.
Similarly, EPA has established a
regulatory program under the SDWA to
prevent underground injection which
endangers drinking water sources. Class
I deep wells inject below the lowermost
geologic formation containing an
underground source of drinking water,
and are subject to minimum location,
construction, and operation
requirements. The Agency believes that
application of dilution rules to these
wastes would not further minimize
threats to human health and the
environment, and that disposal of these
wastes by underground injection at the
characteristic levels is as sound as the
treatment option. However, hazardous
effluent, sludges, or other residues
generated from these treatment trains,
or pretreatment from CWA or SDWA
systems, that are subsequently land
disposed are subject to the land disposal
restriction provisions.
The Agency also is limiting the
circumstances under which treatment
standards expressed as specified
methods apply to wastes regulated
under the CWA and SDWA programs.
In general, the Agency believes that
where a treatment standard is
expressed as a specified method, and
where application of that method is
consistent with and promotes the
objectives of the program, it should be
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"Federal Register / Vol. 55,'No. 108 / Friday, June 1, 19SO /Rules and Regulations
22321
impermissible to dilute these wastes and
avoid treating them by the designated
treatment method. With respect to
existing CWA regulations, the Agency
believes that this is true for all specified
methods in today's rule. Therefore, the
Agency is specifying that dilution is
impermissible for these wastes, and that
the treatment standards expressed as
specified methods apply. The Agency,
however, is not requiring treatment of
underground injected wastes with the
specified methods, based on the
previously-stated belief that disposal of
such characteristic wastes by this
method is as sound as the treatment
option. (The Agency emphasizes that
any mixture of listed and characteristic
wastes is subject to the existing dilution
prohibition rule, and must comply with
the treatment standard for the listed
waste, even if it is a specified method.)
The Agency received comments
indicating that generators may be likely
to change waste codes and ship their
wastes as characteristic wastes rather
than as listed wastes as a result of this
rulemaking. The Agency is concerned
with the potential for mislabeling
hazardous wastes, but believes that this
incentive has always existed since
characteristic wastes may be disposed
in a subtitle D facility once they no
longer exhibit a hazardous
characteristic. Furthermore, the Agency
is revising the waste identification
requirements of 40 CFR parts 261, 202,
254, and 265 to require that all relevant
waste codes must be provided; we
believe this revision will enhance the
ability to enforce the accurate labeling
of hazardous wastes. Finally, the
Agency emphasizes that the mislabeling
of hazardous wastes is a serious
violation of the land disposal
restrictions, and potentially a criminal
act. The Agency will be modifying the
existing Waste Analysis Plan Guidance
to aid treatment and disposal facilities
in determining whether waste has been
properly classified.
The Agency is promulgating certain
provisions of general applicability in
today's rulemaking, including certain
revisions to the existing rule that
prohibits dilution of prohibited wastes,
amendments to 40 GFR 262.11, which
outlines the procedures for identification
of hazardous wastes, and modifications
to the tracking and recordkeeping
requirements of 40 CFR 268.7. In
addition, EPA is modifying existing
testing requirements for treatment and
disposal facilities, and amending
subparagraph (c) of 40 CFR 261.33
(commercial chemicals that are
hazardous wastes when discarded) due
to the possible lack of clarity that
became apparent in the course of
establishing treatment standards for
these wastes. The Agency also is
clarifying certain questions of
applicability, such as whether, wastes
formerly excluded by the Bevill
Amendment are to be considered newly
identified for purposes of the land
disposal restrictions, and applicability
of California list prohibitions to newly
identified and newly lifted hazardous
wastes.
Unless a longer national capacity
variance is specified, the effective date
for compliance with treatment standards j
for all waste codes in the final rule has
been extended to August 8,1990 by |
granting a three-month national capacity
variance. The effective date is being ^
delayed because the Agency realizes
that even where data indicate that
sufficient treatment capacity exists, it is
not immediately available. Nonetheless,
all Third Third wastes become restricted
on May 8,1990 and therefore subject to
a number of LDR provisions. For
example, if hazardous wastes not
treated in compliance with applicable
treatment standards are disposed of in
surface impoundments or landfills, such
units must meet minimum technological
requirements. Furthermore, wastes
subject to this extension of the effective
date must be in compliance with all
applicable recordkeeping requirements,
and California list prohibitions, if
applicable.
Finally, wastes for which treatment
standards are being promulgated may
be land disposed after their effective
dates only if the applicable treatment
standards are met, or if disposal occurs
in units that satisfy the "no migration"
standard.
Outline
I. Background
A. Summary of the Hazardous and Solid
Waste Amendments of 1984 and the
Land Disposal Restrictions Framework
1. Statutory Requirements
2. Applicability to Injected Wastes
3. Solvents and Dioxins
4. California List Wastes
5. Disposal of Solvents, Dioxins, and
California List Wastes in Injection
Wells
6. Scheduled Wastes
7. Newly identified and Listed Wastes
B. Regulatory Framework
1. Applicability
2. Treatment Standards
3. National Capacity Variances from the
Effective Dates
4. Case-By-Case Extensions of the Effec-
tive Dates
5. "No Migration" Exemptions from the
Restrictions
6. Variances from the Treatment Stand-
ards
7. Exemption for Treatment in Surface
Impoundments
8. Storage of Prohibited Wastes
9. "Soft Hammer" Provisions
C. Pollution Prevention (Waste Minimizii-
tlon) Benefits
D. Summary of the Proposed Rule
1. Characteristic Wastes
2. Determining When Dilution is Permis-
sible
3. Other Impermissible Dilution Issues
4. Treatment Standards for Multi-Source
Leachate
5. Alternate Treatment Standards for
Lab Packs
8. Applicability to Mineral Processing
Wastes
7. Clarification of "P" and "U" Soiid
Wastes
8. Treatment/Disposal Facility Testing
Requirements
9. Testing of Wastes Treated in 90-Day
Tanks or Containers
10. Generator Notification Requirements
11. Storage Prohibition
12. Applicability of California List Prohi-
bitions After May 8. 1990
II. Summary of Today's Final Rule
A. Applicability of Today's Final Rule
1. Three Month National Capacity Vari-
ance for Third Third Wastes
2. Hazardous Woste Injection Wells
Regulated Under 40 CFR 148
3. Remaining Scheduled Listed Hazard-
ous Wastes
4. Characteristic Hazardous Wastes
5. Characteristic Wastes Reguhited
Under the Safe Drinking Water Act
(SWDAJ and the Clean Water Act
(CWA) and RCRA
8. Mineral Processing Wastes
B. Implementation of Requirements for
Characteristic Wastes
1. Overlap of Standards for Listed
Wastes that also Exhibit a Character-
istic
2. Revisions to Waste Identification Re-
quirements
3. Wastes Subject to a Capacity Vari-
ance
4. Use of TCLP v. EP Analytical Meth-
ods for Compliance
5. Newly Identified Toxicity Characteris-
tic (TCJ Wastes
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22522
Federal Register / ¥ol. 55, No. 100 / Friday, June 1. 1990 / Rules and Regulations
6. Further Principle* Governing Applica-
bility
C. Amended Tracking System for Charac-
teristic Prohibited Wastes
D. The Dilution Prohibition as it Applies to
Centralized Treatment
£. Treatment Standards for Multi-Source
Leechate
F. Alternate Treatment Standards for Lab
Packs
G. Mixed (Hazardous/Radioactive) Wastes
H. Nationwide Variances from the" Effec-
tive Date
I. Generator Notification Requirements
J. Waste Analysis Plans and Treatment/
Disposal Facility Testing Requirements
K. Testing of Wastes Treated in 90-Day
Tanks or Containers
L. Clarification of "P" and "U" Solid
Wastes
M. Storage Prohibition
N. Caie-by-Case Extension Petitions
O. Applicability of California list Prohibi-
tions After May 8.1990
P. Analysis of Treated Wastes
Q. Practical Quantitation Limits (PQLs)
R. Best Demonstrated Available Technol-
ogies (BOAT)
S. Reformatting of Treatment Standard
Tables and Addition of Appendix VI! to
Part 268, Effective Dates for Prohibited
Wastes
T. Relationship of Hazardous Waste
Treatment Council v. EPA to Treatment
Standards Promulgated in Today's Final
Rule
III.A, Detailed Discussion of Today's Final
Rule
1. Development and Identification of
Treatment Standards
a. The BOAT Methodology
b. Use of Technologies Identified As
BDAT
c. Applicability of Treatment Standards
to Treatment Residues Identified as
"Dcrived-From" Wastes and to Waste
Mixtures
d. Wastewater Versus Nonwastewater
Standards
e. Transfer of Treatment Standards
f. Treatment Standards Based on Single
Facility Data, Grab Samples Versus
Composite Samples, and Waste Anal-
ysis Plans
g. Analytical Requirements, the BDAT
List and Relationship of PQLs to
BDAT
h. Relationship of Detection Limits to
Concentration-Based Standards
1. Relation of Hazardout Waste Treat-
ment Council v. EPA
1II.A.2, Treatment Standards for Certain
Characteristic Wastes
a. General Issues on Developing Treatment
Standards for Characteristic Wastes
b, Ignitable Characteristic Wastes
c. Corrosive Characteristic Wastes
d. Reactive Characteristic Wastes
e. Effect of Treatment Standards on Dis-
posal Provisions in 40 CFR 264 and 285
for Ignitable and Reactive Wastes
f, EP Toxic Halogenated Pesticide Wastes
UI.A.3. Treatment Standards for Metal
Wastes
a. Introduction
b. Arsenic {D004. K031, K084, K101, K102.
P010, POll, P01Z, P036, P038, U138]
c. Barium {D005, P013]
d. Cadmium JD006, Cadmium Batteries]
e. Chromium [D007, U032]
f. Lead [D008, K069, K100, P110, U144,
ui4s, ime}
g. Mercury fJDOW, K071, K106, P06S, P092,
U151]
h. Selenium [D010, P103, P114, U204, U20S)
i. Silver [D011. P099, P104J
j. Thallium [P113, P114, P11S, U214, U21S,
U218, U217J
k. Vanadium (P119, PI20]
1II.A.4. Treatment Standards for Remaining F
and K Wastes
a. F002 and F005
b. F006 and F019
c. F024
d. F025
e. K001 and U051
f, K002, K003, K004, KOOS, K006, K007, and
KOOB
g. K011, KOT3, and K014
h. K015
i. K017 and K073
|. K021
k. K022. K025, K026, K035, and KOS3
I, K028, K029, KD95. and K098
m. K032, K033, K034, K041, K097, and K096
n. K038 and K037
o. K042. K085, and K105
p, K044, K045, K048, and K047
q. K04S, K049, KOSO, K051. and K052
r, K060
s. K061
t, K088
I1I.A.5. Development of Treatment Standards
for U and P Wastewaters and Non-
wastewater* Excluding Metal Salts and
Organo-metallics
a. Concentration-based Standards for Spe-
cific Organics
b. Technology-based Standards for Specif-
ic Organics •-
c. U and P Wastes That are Potentially
Reactive
d. Gases
e, U and P Cyanogens
III.A.6, Development of Treatment Standards
for Multi-Source Leachate •
a. Background
b. Final Approach for Regulating Multi-
Source Leachate
c. Multi-Source Leachate That Exhibits a
Characteristic of Hazardous Waste
d. Multi-Source Leachate Containing Diox-
ins and Furans
e. Status of Multi-source Leachate that is
Mixed with Other Prohibited Wastes
III.A.7. Applicability of Treatment Standards
to Soil and Debris
III,A,8, Radioactive Mixed Waste
n. Characterization and Industries Affect-
ed
b. Applicable Technologies
c. Determination of BDAT for Certain
Mixed Wastes
UI.A.9, Alternate Treatment Standards for
Lab Packs
B. Capacity Determinations .
1, Determination of Alternative Capacity
and Effective Dates for Surface Land-
Disposed Wastes for which Treatment
Standards are Proposed
a. Total Quantity of Land-Disposed
Wastes
b. Required Alternative Capacity for
Surface Land-Disposed Wastes
c. Capacity Currently Available and
Effective Dates
2. Contaminated Soil and Debris Capac-
ity Variance
3, Capacity Determination for Under-
ground Injected Wastes
C. Ninety-Day Capacity Variance for Third
Third Wastes
D, Applicability of Land Disposal Restric-
tions
1. Introduction
2. Legal Authority Over Characteristic
Wastes
a. Introduction
b. General Standard for Agency Con-
struction of Statutes
c. Scope of *.gency Authority for
Treatm<>~ airements
d. Agency £ amework for Addressing
Treatment Standards for Character-
istic Wastes and Integrating Them
with Other Regulatory Programs
3. Treatment Levels
a. Environmental Considerations
(1) Toxic Wastewaters
(2) Toxic Nonwastewaters
(3) Other Characteristic Wastes
b. Regulatory Problems
4, Methods of Treatment
a. Environmental Considerations
b. Regulatory Problems
S. General Dilution Prohibition
a. Environmental Considerations
b. Regulatory Problems
8. Exemption to Dilution Prohibition for
Characteristic Wastes Treated for Pur-
poses of Certain Clean Water Act Pro-
gram*
a. Introduction
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Federal Register / Vol. 55, No, 106 / Friday, June 1, 1990 / Rules and Regulations 22523
b. Environmental Considerations
c. Regulatory Problems
7, Exemption for U3R Prohibitions for
Characteristic Wastes Disposed Below
Characteristic Levels in Wells Regu-
lated Under the Safe Drinking Water
Act
a. Introduction
b. Environmental Considerations
c. Regulatory Problems
E. Implementation of Requirements for
Characteristic Wastes
1. Overlap of Treatment Standards for
Listed Wastes that also Exhibit a
Characteristic
Z. Revisions to Waste Identification Re-
quirements
3. Wastes Subject to a Capacity Vari-
ance
4. Use of TCLP v. EP Analytical Meth-
ods for Compliance
5. Newly Identified TC Wastes
6, Further Principles Governing Applica-
bility
a. Other Statutory Exemptions or Ex-
clusions
b. Restricted Wastes Versus Prohibit-
ed Wastes
c. Changes in Treatability Groups
F. Amended Tracking System for Charac-
. (eristic Prohibited Wastes
G, The Dilution Prohibition as it Applies to
Centralized Treatment
H. Applicability of Today's Final Rule to
Mineral Processing Wastes
I. Generator Notification Requirements
|. Waste Analysis Plans and Treatment/
Disposal Facility Testing Requirements
K. Testing of Wastes Treated in 90-Day
Tanks or Containers
L. Clarification .of "P" and "U" Solid
Wastes
M. The Storage Prohibition
N. Case-By-Case Extensions
O. Applicability of California List Prohibi-
tions After May 8,1990
IV. State Authority
A. Applicability of Rules in Authorized
States
B. Effect on State Authorizations ..
C. State Implementation
V. Effect of the Land Disposal Restrictions
Program on Other Environmental Programs
A. Discharges Regulated Under the Clean
Water Act
B. Discharges Regulated Under the Marine
Protection, Research, and Sanctuaries
Act
C. Wellhead Protection Regulated Under
the Safe Drinking Water Act
D. Air Emissions Regulated Under the
Clean Air Act (CAA)
E. Clean-Up Actions Regulated Under the
. Comprehensive Environmental Re-
sponse, Compensation, and Liability Act
F. Applicability of Treatment Standards to
Wastes from Pesticides Regulated Under
the Federal Insecticide, Fungicide, and
Rodenticide Act
G, Regulatory Overlap of Polychlorinated
Biphenyls (PCBs) Under the Toxic Sub-
stances Control Act (TSCA) and Re-
source Conservation and Recovery Act
VI. Regulatory Requirements
A. Regulatory Impact Analysis—Surface
Disposed Wastes
1. Overview of Affected Wastes, Facili-
ties, and Management
a. Quantity of Affected Waste
b. Affected Facilities
c. Waste Management Practices
2, Benefits of the Final Rule
a. Humsn Health Benefits
b. Safety Benefits
c. Environmental Benefits
3. Costs
4, Economic Impacts
B. Regulatory Flexibility Analysis—Sur-
face Disposed Wastes
C. Regulatory Impact Analysis—Under-
ground Injected Wastes
D, Regulatory Flexibility Analysis—Under-
ground Injected Wastes
E, Paperwork Reduction Act
F. Review of Supporting Documents
I. Background
A. Summary of the Hazardous and Solid
Waste Amendments of 1984 and the
Land Disposal Restrictions Framework
1. Statutory Requirements
The Hazardous and Solid Waste
Amendments (HSWA), enacted on
November 8,1S84, prohibit the land
disposal of hazardous wastes;
Specifically, the amendments specify
dates when particular groups of
hazardous wastes are prohibited from
land disposal unless "* * * it has been
demonstrated to the Administrator, to a
reasonable degree of certainty, thai
there will be no migration of hazardous
constituents from the disposal unit or
injection zone for as long as the wastes
remain hazardous" (RCRA sections 3004
(d)(l), (e)(l), (g)(5); 42 U.S.C, 6924 (d)(l),
MID. (8)15)).
The amendments also require the
Agency to set "* ' * levels or methods
of treatment, if any, which substantially
diminish the toxicity of the waste or
substantially reduce the likelihood of
migration of hazardous constituents
from the waste so that short-term and
long-term threats to human health and
the environment are minimized" (RCRA
section 3004(m)(l), 42 U.S.C. 6024(m)(l)).
Wastes that meet treatment standards
established by EPA are not prohibited
and may be land disposed. In addition, a
hazardous waste that does not meet the
treatment standard may be land
disposed provided the "no migration"
demonstration specified in RCRA
sections 3004 (d)(1), (e)(l) and (g)(5) is
accepted by EPA.
For the purposes of the restrictions,
HSWA defines land disposal to
include, but not be limited to, any
placement of such hazardous waste in a
landfill, surface impoundment, waste
pile, injection well, land treatment
facility, salt dome formation, salt bed
formation, or underground mine or
Give" (RCRA section 3004(k), 42 U.S.C.
6i24(k)).
The land disposal restrictions are
effective when promulgated unless the
Administrator grants a national capacity
variance from the otherwise-applicable
date and establishes a different date
(not to exceed two years beyond the
statutory deadline] based on "* * * the
earliest date on which adequate
alternative treatment, recovery, or
disposal capacity which protects human
health and the environment will be
available" (RCRA section 3004(h)(2), 42
U.S.C. 6924(h)(2)). The Administrator
may also grant a case-by-case extension
of the effective date for up to one year,
renewable once for up to one additional
year, when an applicant successfully
makes certain demonstrations (RCRA
section 3004(h)(3), 42 U.S.C. 6924(h)(3)J,
A case-by-case extension can be
granted whether or not a national
capacity variance has been granted.
The statute also allows treatment of
hazardous wastes in surface
impoundments that meet certain
minimum technological requirements (or
certain exceptions thereto). Treatment
in surface impoundments is permissible
provided the treatment residues that do
not meet the treatment standard(s) (or
applicable statutory prohibition levels)
are "* * * removed for subsequent
management within one year of the
entry of the waste into the surface
impoundment" (RCRA section
30050)(il)(B), 42 U.S.C. 6925(j)(H)(B)).
In addition to prohibiting the land
disposal of hazardous wastes. Congress
prohibited storage of any waste which is
prohibited from land disposal unless
"* * * such storage is solely for the
purpose of the accumulation of such
quantities of hazardous waste as are
necessary to facilitate proper recovery,
treatment or disposal" (RCRA,section
3004(j), 42 U.S.C. 6924(j)J.
2. Applicability to Injected Wastes
As noted above, disposal of
hazardous wastes in injection wells is
subject to the provisions of HSWA. The
injection of hazardous wastes is
controlled by two statutes, RCRA and
the Safe Drinking Water Act (SDWA).
The regulations governing injection of
these wastes have been codified along
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22524 Federal Register / Vol. 55, No. 106 / Friday, June 1, 1990 / Rules and Regulations
with other regulations of the
Underground Injection Control (UIC)
program under the SDWA in parts 124.
144, 145, 148, 147, and 146 of the Code of
Federal Regulations.
3. Solvents and Dioxins
Effective November 8, 1988, HSWA
prohibited land disposal (except by deep
well injection] of solvent-containing
hazardous wastes numbered F001-F005
listed in 40 CFR 261.31 and dioxin-
containing hazardous wastes numbered
F020-F023 and F028-F028 {RCRA
sections 3004 fe)(l), (e)(2), 42 U.S.C. 6924
(e)(l j, (e}(2)). In response to this
mandate, EPA promulgated a final rule
(51 FR 40572} on November 7. 1986.
implementing RCRA section 3004fe).
This rule established the general
framework for the land disposal
restrictions program, and established
treatment standards for the F001-FOOS
solvent wastes and F020-F023 and FQ26-
F028 dioxin-containing wastes.
4, California List Wastes
Effective July 8. 1987, the statute
prohibited further land disposal (except
by deep well injection] of the following
listed or identified wastes (RCRA
section 3001) set out in RCRA sections
3004 (d)(l) and (d](2) (42 U.S.C. 6924
(A] Liquid hazardous wastes,
including free liquids associated with
any solid or sludge, containing free
cyanides at concentrations greater than
or equal to 1,000 mg/L
(B) Liquid hazardous wastes,
including free liquids associated with
any solid or sludge, containing the
following metals (or elements] or
compounds of these metals (or elements)
at concentrations greater than or equal
to those specified below:
(!) Arsenic and/or compounds (as As)
500 mg/1;
(ii) Cadmium and/or compounds (as
Cd) 100 mg/1
(iii) Chromium (VI and/or compounds
(as Cr VI)) 500 mg/1;
(iv) Lead and/or compounds (as Pb)
500 mg/1;
(v) Mercury and/or compounds (as
Hg) 20 mg/1:
(vi) Nickel and/or compounds (as Ni)
134 mg/1;
(vii) Selenium and/or compounds (as
Se) 100 mg/1; and
(viii) Thallium and/or compounds (as
Tl) 130 mg/1.
(C) Liquid hazardous waste having a
pH less than or equal to two (2.0).
(D) Liquid hazardous wastes
containing polychlorinated biphenyla
(PCBs) at concentrations greater than or
equal to SO ppm.
(E) Hazardous wastes containing
halogenated organic compounds (HOCs)
in total concentration greater than or
equal to 1,000 mg/kg.
On July 8,1987, EPA promulgated a
final rule (52 FR 25760) implementing
RCRA section 3004(d). This rule
established treatment standards for
California list wastes containing PCBs
and certain HOCs, and codified the
statutory prohibition on liquid corrosive
wastes. The statutory prohibition also is
in effect for the California list wastes
containing free cyanides, metals, and
the California list dilute HOC
wastewaters.
5. Disposal of Solvents, Dioxins and
California List Wastes in Injection Wells
Section 3004(f) of RCRA required that
the Administrator prohibit the disposal
of solvents, dioxins and California list
wastes in deep wells, effective August 8,
1988, unless such disposal had been
determined to be protective of human
health and the environment for as long
as the wastes remained hazardous, or
unless a variance had been granted
under RCRA section 3004(h). On July 28,
1988, the Agency established effective
dates for the prohibition on injection of
solvents and dioxin wastes (53 FR
28118). In another regulation, effective
August 8,1988 and published August 16,
1986 in the Federal Register, die Agency
established effective dates for the
prohibition on injection of California list
wastes (53 FR 30908).
6. Scheduled Wastes
HSWA required the Agency to
prepare a schedule by November 8,1986,
for restricting the land disposal of all
hazardous wastes, including
underground injected wastes, listed or
identified as of November 8,1984, in 40
CFR part 281, excluding solvent- and
dioxin-containing wastes and California
list wastes covered under the schedule
set by Congress. The schedule, based on
a ranking of the listed wastes that
considers their intrinsic hazard and their
volume, ensures that prohibitions and
treatment standards are promulgated
first for high volume hazardous wastes
with high intrinsic hazard before
standards are set for low volume wastes
with low intrinsic hazard. The statute
further requires that these
determinations be made by the
following deadlines:
(A) At least one-third of all listed
hazardous wastes by August 8,1988;
(B) At least two-thirds of all listed
hazardous wastes by June 8,1989; and
(C) All remaining listed hazardous
wastes and all hazardous wastes "
identified as of November 8,1984, by
one or more of the characteristics
defined in 40 CFR part 281 by May 8,
1990.
Furthermore, if EPA failed to set a
treatment standard by the statutory
deadline for any hazardous waste in the
first or second third of the schedule, •
should such waste be disposed in a
landfill or surface impoundment that
unit must meet the minimum
technological requirements specified in
RCRA section 3004(o] for new facilities
(RCRA section 3004(g)(B)). (Note: In the
August 17,1988 First Third final rule,
EPA interpreted the term "such facility"
in section 3004(g)(6) to refer to die
individual surface impoundment or
landfill unit) In addition, prior to
disposal in such unit the generator was
required to certify to the Administrator
that he had investigated the availability
of treatment capacity and had
determined that disposal in such landfill
or surface impoundment was the only
practical alternative to treatment
currently available to the generator.
This restriction on the use of landfills
and surface impoundments that met the
minimum technological requirements
applied until EPA set a treatment
standard for the waste, or until May 8,
1990, whichever was sooner. These
requirements were collectively referred
to as the soft hammer provisions. Other
forms of land disposal, including
underground injection, were not
similarly restricted, and could continue
to be used for disposal of untreated
wastes until EPA promulgated a
treatment standard, or until May 8,1990,
whichever was sooner.
If the Agency fails to set a treatment
standard for any scheduled hazardous
waste by May 8,1990, the soft hammer
provisions are superseded by the hard
hammer. (Note: It is EPA's interpretation
that me hard hammer applies to
characteristic wastes. See 54 FR 48409.)
These wastes are automatically
prohibited from all forms of disposal on
May 8,1990, unless the wastes are the
subject of a successful "no migration"
demonstration (RCRA section 3004(g)(S),
42 U.S.C. 6924(g)(5)). (Note: RCRA
section 3004(h)(2) permits extensions of
the effective date such as national
capacity extensions or case-by-case
extensions beyond die hard hammer
date.)
On May 2& 1988. EPA promulgated
the schedule for setting treatment
standards for the listed and identified
hazardous wastes (51 FR 19300). All
wastes that are identified as hazardous
by characteristic are scheduled in the
Third Third. This schedule is
incorporated in 40 CFR 288.10,268.11
and 268.12.
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22525
For the scheduled wastes, the statute
does not provide different deadlines for
restriction of wastes that are injected
underground versus disposed of in
surface land units. The Agency did,-
howcver. propose and promulgate First
Third regulations for surface disposed
and injected wastes on separate dates.
The First Third final rule, promulgated
on August 8,19S8, and published in the
Federal Register on'August 17,1988 (S3
FR 31138), set out the conditions under
which wastes included in the first one-
third of the schedule of restricted
hazardous wastes may continue to be
land disposed (other than by injection).
Final regulations prohibiting deep well
injection of certain First Third wastes
were published on August 16,1988 (53
FR 30908) and on June 14,1389 (54 FR
25416).
The Second Third final rule,
promulgated on lune 8,1989, and
published in the Federal Register on
June 20,1989, (54 FR 2B5i4) established
treatment standards and prohibition
effective dates for land disposal and
underground injection for certain
wasles. In addition, EPA promulgated
treatment standards and effective dates
for certain First Third soft hammer
wastes. Third Third wastes and newly
listed wastes.
Today's notice promulgates me
conditions under which Third Third
wastes may continue to be land
disposed. It also promulgates treatment
standards for some First and Second
Third restricted hazardous wastes, five
newly listed wastes (i.e., listed after
November 8,1984), promulgates
alternate treatment standards for lab
packs, and revises the treatment
standards for petroleum refining wastes
(EPA Hazardous Waste No. K048-K052).
This rule applies to all forms of land
disposal, including deep well injection,
and finalizes the November 22.1989
proposed rulemaking (54 FR 48372).
7. Newly Identified and Listed Wastes
RCRA requires the Agency to make a
land disposal prohibition determination
for any hazardous waste that is newly
identified or listed in 40 CFR part 261
after November 8,1984, within six
months of the date of identification or
listing (RCRA section 3004(g)(4), 42
U.S.C. 8924(g)(4)). However, the statute
does not provide for an automatic
prohibition of the land disposal of such
wastes if EPA fails to meet this
deadline. Today's notice promulgates
treatment standards for five newly
listed wastes (see section III.A).
B. Regulatory Framework
The November 7,1986, final rule (51
FR 40572) established the regulatory
framework for implementing the land
disposal restrictions program. Some
changes to the framework were made in
the July 8.1987, final rule (52 FR 25760)
that prohibited the land disposal of
California list wastes, and in the August
17,1988, First Third final rule. Some
additional changes are also being
promulgated in today's final rule,
particularly with respect to
characteristic wastes. Regulations
specifying how the framework applies to
injected wastes were promulgated July
26,1988 (53 FR 28118). The following
discussion summarizes the major
provisions of the land disposal
restrictions framework.
1, Applicability
The land disposal restrictions apply
prospectively to the affected wastes. In
other words, hazardous wastes land
disposed after the applicable effective
dates are subject to the restrictions, but
wastes land disposed prior to the
effective dates are not required to be
removed or exhumed for treatment (51
FR 40577). However, if these wastes or
contaminated media are excavated and
removed, these wastes are subject to the
land disposal restrictions. Similarly,
only surface impoundments receiving
restricted wastes after the applicable
deadline are subject to the restrictions
on treatment in surface impoundments
contained in 40 CFR 268.4 and RCRA
section 3005(j)(ll). Also, the storage
prohibition applies to wastes placed in
storage after the effective dates.
The provisions of the land disposal
restrictions apply to wastes produced by
generators of greater than 1,000
kilograms of hazardous waste per
calendar month, as well as small
quantity generators of 100 to 1,000
kilograms of hazardous waste (or
greater than 1 kilogram of acute
hazardous waste) in a calendar month.
However, wastes produced by small
quantity generators of less than 100
kilograms of hazardous waste (or less
than 1 kilogram of acute hazardous
waste) per calendar month are
conditionally exempt from RCRA,
including the land disposal restrictions
(sec 40 CFR 268.1).
The land disposal restrictions apply to
all facilities subject to RCRA, including
both interim status and permitted
facilities. The requirements of the land
disposal restrictions program supersede
40 CFR 270.4(a), which currently
provides that compliance with a RCRA
permit constitutes compliance with
subtitle C of RCRA. Therefore, even
though the requirements may not be
specified in the permit conditions, all
permitted facilities are subject to the
restrictions. Moreover, the land disposal
restrictions are material conditions or
requirements of the interim status
standards that may be enforced in either
a criminal or civil action. Although EPA
attempted to clarify this point in the
June 4,1987 correction notice (54 FR
21010, item #1, and 21016, item #27), the
Agency's correction has been viewed as
imprecise in that it characterized part
265 as requirements of persons
managing wastes pursuant to part 268.
Although the Agency believes that this
point is already established, EPA is
clarifying today that the part 268
provisions should be characterized as
material conditions or requirements of
part 265. Therefore, 265.l(e) is modified
accordingly,
2. Treatment Standards
By each statutory deadline, the
Agency must establish the applicable
treatment standards under 40 CFR part
268 subpart D for each restricted
hazardous waste (RCRA section
3004(m)(lJ), After the applicable
effective dates, restricted wastes may be
land disposed only if they meet the
treatment standards, or it has been
demonstrated to a reasonable degree of
certainty, that there will be no migration
of hazardous constituents from the
disposal unit or injection zone for as
long as the wastes remain hazardous. If
EPA does not promulgate treatment
standards by the statutory deadlines,
such wastes are prohibited from land
disposal (with the exception of First and
Second Third scheduled hazardous
wastes, which were subject to the soft
hammer provisions of RCRA section
3004(g)(6) until May 8,1990).
At present, a treatment standard is
based on the performance of the best
demonstrated available technology
(BDAT) to treat the waste (51 FR 40578).
EPA may establish treatment standards
either as specific technologies or as
performance standards based on the
performance of BDAT. Compliance with
performance standards may be
monitored by measuring the
concentration level of the hazardous
constituents (or in some circumstances,
indicator pollutants) in the waste,
treatment residual, or in the extract of
the waste or treatment residual. When
treatment standards are set as
performance levels, the regulated
community may use any technology not
otherwise prohibited (such as
impermissible dilution) to treat the
waste to meet the treatment standard.
Thus, treatment is not limited to only
those technologies considered in
determining the treatment standard.
However, when treatment standards are
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expressed as specific technologies, such
technologies must be employed,
3. National Capacity Variances From the
Effective Dates
The Agency has the authority to grant
national capacity variances from the
statutory effective dates, not to exceed
two years, if there is insufficient
alternative protective treatment,
recovery or disposal capacity for the
wastes (RCRA section 3004(h)(2)). To
make capacity determinations, EPA
compares the nationally available
alternative treatment, recovery, or
protective disposal capacity at
permitted and interim status facilities
which will be in operation by the
effective date with the quantity of
restricted waste generated. If there is a
significant shortage of such capacity
nationwide, EPA will establish an
alternative effective date based on the
earliest date such capacity will be
available. During the period such a
capacity variance is in place, if the
waste is disposed in a landfill or surface
impoundment, such disposal may only
be in a unit meeting the minimum
technological requirements of RCRA
section 3004(o) (53 FR 31188 and 40 CFR
2W.5(hH2)). It should be noted, however,
that if a waste subject to a national
capacity variance is treated to meet the
applicable treatment standards, the land
disposal restrictions allow such waste to
be disposed in a subtitle C landfill or
surface impoundment regardless of
whether the unit meets minimum
technological requirements. Note,
however, that independent RCRA
provisions may require such wastes to
be disposed in units meeting minimum
technological requirement.
4. Case-By-Case Extensions of the
Effective Date
The Agency will consider granting up
to a one-year extension (renewable only
once) of a prohibition effective date on a
case-by-case basis. The requirements
outlined in 40 CFR 268.5 must be
satisfied, including a demonstration that
adequate alternative treatment,
recovery, or disposal capacity for the
petitioner's waste cannot reasonably be
made available by the effective date due
to circumstances beyond the applicant's
control, and that the petitioner has
entered into a binding contractual
commitment to construct or otherwise
provide such capacity. If a waste is
placed in a surface impoundment or
landfill during the period that such a
case-by-case extension is in place, such
unit must meet the minimum
technological requirements of RCRA
seciion
5. "No Migration" Exemptions From the
Restrictions
EPA has the authority to allow the
land disposal of a restricted hazardous
waste which does not meet the
treatment standard provided that the
petitioner demonstrates that there will
be no migration of hazardous
constituents from the disposal unit or
injection zone for as long as the waste
remains hazardous (40 CFR 268.6). If a
petition is granted under 40 CFR part
268, it can remain in effect no longer
than ten years for disposal in interim
status land disposal units, end for no
longer than the term of the RCRA permit
for disposal in permitted units (40 CFR
268.6(h)),
However, for injected wastes, 40 CFR
148.20 (promulgated on July 26,1988, see
53 FR 28118) outlines in detail the
Agency's requirements for "no
migration" petitions for hazardous
waste injection facilities. Briefly, a
petitioner is required, through modeling.
to demonstrate that there is no
migration of hazardous constituents
from the injection zone for as long as the
waste remains hazardous. This
demonstration can be made in one of
two ways: the use of flow and transport
models to show that injected fluids will
not migrate vertically ne year is not for the
purpose of accumulating sufficient
quantities to facilitate proper treatment,
recovery, or disposal. Id,
9. The "Soft Hammer" Provisions
First and Second Third wastes for
which EPA did not promulgate
treatment standards by their respective
effective dates could continue to be
disposed of in landfill and surface
impoundment units until May 8,1990.
Such land disposal could occur only if
certain demonstrations were made, and
provided technology requirements of
RCRA section 3004(o) (see 53 FR 31181,
August 17,1988). Other types of land
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disposal were not similarly restricted
(e.g., underground injection). On May B,
1990, wastes for which EPA has not
established treatment standards are
prohibited from land disposal (including
underground injection). This prohibition
is referred to as the hard hammer.
Effective May B, 1990, therefore, the soft
hammer provisions are no longer in
effect.
C. Pollution Prevention (Waste
Minimization) Benefits
EPA's progress over the years in
improving environmental quality
through its media-specific pollution
control programs has been substantial.
Over the past two decades, standard
industrial practice for pollution control
concentrated to a large extent on "end
of pipe" treatment or land disposal of
hazardous and non-hazardous wastes.
However, EPA realizes that there are
limits to how much environmental
improvement can be achieved under
these programs which emphasize
management after pollutants have been
generated. EPA believes that reducing or
eliminating discharges and/or emissions
to the environment through the
implementation of cost-effective source
reduction and environmentally sound
recycling practices can provide
additional environmental improvements.
Many corporations are seeking to
incorporate waste minimization
planning programs into their strategic
planning to lower emission volumes and
toxicities as a function of actual plant
processes through either recycling or
source reduction.
Under sections 3002(b) and 3005(h),
hazardous waste generators are
required to certify that they have a
program in place to reduce the volume
or quantity and toxicity of hazardous
waste to the degree determined by the
generator to be economically
practicable. EPA encourages hazardous
waste generators to pursue source
reduction and environmentally sound
recycling wherever possible to reduce
the need for and costs of subsequent
treatment, storage and disposal. In many
cases, there may be economic as well as
environmental benefits for companies
that pursue pollution prevention options.
Waste minimization planning programs
have been suggested by EPA and
mandated by some state governments.
Several EPA documents on waste
minimization are available to the public .
(Draft Guidance to Hazardous Waste
Generators on the Elements of a Waste
Minimization Program; Notice and
Bequest for Comment, Federal Register
Vol. S4, No. Ill, June 12,1889; The EPA
Manual for Waste Minimization
Opportunity Assessments, EPA 600/2-
88/025, April liBB). Several state
governments have already enacted
waste minimization legislation
(Massachusetts Toxics Use Reduction
Act of 1989; Oregon Toxics Use
Reduction and Hazardous Waste
Reduction Act, House Bill 3S15, July 2,
1989). About six other states have
legislation pending that will mandate
some type of waste minimization
program and/or facility planning. About
25 other states offer some type of
technical assistance to companies that
seek alternatives to treatment, storage
and disposal of waste.
Many companies have already
implemented waste minimization
programs. Most of these waste
minimization programs have elements in
common. The most successful programs
have incorporated waste minimization
into company policy. It is advantageous
for top corporate management and/or
individual plant management to provide
support for assessing and understanding
the economic and regulatory benefits of
pursuing waste minimization versus
treatment, storage and disposal options.
Typically, management supports
assessment of the true costs associated
with waste production, including the
costs of compliance, loss of production
potential, and potential liability.
Program success generally requires
that each individual, regardless of status
or rank, be encouraged to make a
contribution to minimize waste.
Collective and individual pay incentives
can be provided for productivity
improvements. Waste minimization
circles can be established using self-
managing teams chosen from a broad
spectrum of production and .
management personnel. These
management teams can be provided
with all information necessary to
adequately assess waste minimization
opportunities. Additionally, it is very
beneficial for production personnel to be
trained and retrained in optimum use of
plant equipment and raw materials.
Some companies set explicitly defined
objectives for the reduction of waste
volume and toxicity that are achievable
within a reasonable time frame.
Typically, the objectives should not
exceed the ability of the operations
personnel to support and maintain them.
In all cases, it is necessary to
determine the causes of waste
generation. This can be done for
individual processes or for several
combined processes if the plant process
waste streams are particularly complex.
Many corporations have implemented
this type of "waste minimization
assessment" as part of an overall waste
minimization program.
For a waste minimization assessment,
it Is generally necessary to accurately
characterize the type of waste generated
by volume, toxicity and source(s). Most
companies track their waste generation
by a variety of means and then
normalize the results to account for
variations in production rate(s). One
State (Massachusetts Toxics Use
Reduction Act) requires each generator
of a toxic or hazardous substance to
track the rote of waste generation and
release/transfer per unit of product. The
EPA Manual for Waste Minimization
Opportunity Assessments aids In
tracking waste streams which can be
quite difficult to analyze in complex
plant operations, where many processes
discharge into one waste stream.
Next, individual processes can be
examined to search for opportunities for
waste reduction such as recycling,
substituting less hazardous raw
materials, modifying existing equipment,
novel technologies, capital
improvements, and increasing process
efficiency. EPA and State funded
technical assistance programs (e.g.,
Minnesota Technical Assistance
Program—MnTAP, California Waste
Minimization Clearinghouse, U.S. EPA
Pollution Prevention Information
Clearinghouse) are becoming
increasingly available to identify some
of these opportunities. Information is
also available through industry trade
associations, professional consultants
specializing in waste minimization,
technical literature, and chemical and
equipment vendors.
It is important to realize that waste
minimization, especially when
incorporated into company policy, is a
continual process. Ideally, a waste
minimization program becomes an
integral part of the company strategic
plan to increase manufacturing
productivity,
D, Summary of the Proposed Rule
On November 22,1989, the Agency
proposed treatment standards and
prohibition effective dates for
approximately 350 hazardous wastes,
including hazardous wastes listed in 40
CFR 288.12 (Third Third wastes), certain
wastes listed in 40 CFR 268.10 and
268.11 (First and Second Third wastes).
Five newly listed wastes, and wastes
exhibiting a characteristic (i.e.,
ignitability, corrosiviry, reactivity, and
EP toxicity) as described in 40 CFR
261.21-261.24. In addition, the Agency
proposed one modification to the land
disposal restrictions regulatory
framework and several interpretations
of general applicability. Furthermore,
the Agency proposed to revise the
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treatment standards for wastes from the
petroleum refining Industry, EPA
Hazardous Waste Nos, K048-K052.
Today's rulemaking finalizes the
November 22,1989 proposal.
1. Characteristic Wastes
In the November 22,1989 notice, EPA
proposed two alternatives: (1) Set the
treatment standards at the characteristic
level for all of the characteristic wastes;
or (2) set treatment standards at the
lowest level which data indicated could
be consistently achieved, some of which
were below the characteristic levels,
and require these standards to be met
before the waste could be land disposed
(even though the waste was no longer
defined as hazardous). This second
alternative was based on a reading of
the statute that the land disposal
prohibitions can attach at the point a
waste becomes hazardous, and that the
section 3004(m) requirements to treat to
a level (or by a method] that minimizes
threats to human health and the
environment can attach at that point.
Waste that is hazardous at the point of
generation and destined for land
disposal remains subject to the
requirements of section 3004 (m)
regardless of its concentration at any
subsequent time. See 54 FR 48490.
In addition, if a waste is identified as
carrying more than one characteristic, it
would need to meet each treatment
standard or utilize each method for
those characteristics. If 8 listed waste
could also be identified for one or more
characteristic waste codes, EPA
proposed that the waste would have to
be treated to meet the treatment
standards for each of the waste codes.
See 54 FR 48491,
2. Determining When Dilution is
Permissible
The Agency also clarified the dilution
rules as they apply to centralized
treatment in the proposed rule. In
particular, the Agency indicated that
aggregation of wastes for the purpose of
treatment in a centralized treatment
system must, at a minimum, result in
"actual reduction in the toxiciry or
mobility of at least one BDAT
constituent in each prohibited waste
that is centrally treated to the extent
that these constituents are present in
initial concentrations that exceed the
treatment standard for that prohibited
waste." See 54 FR 48494.
3. Other Impermissible Dilution Issues
The Agency proposed that: (1)
Impermissible dilution (as previously
defined for listed wastes) of a waste
that exhibits a characteristic be
prohibited; and (2) impermissible
dilution of a listed waste to achieve a
delisting level be prohibited. See 54 FR
48495.
4..Treatment Standards for Multi-Source
Leachate
On February 27,1989. the Agency
amended the schedule for prohibiting
hazardous wastes from land disposal by
placing multi-source leachate derived
from listed spent solvents and scheduled
hazardous wastes [i.e.. First, Second,
and Third Third) in the Third Third (see
54 FR 8264). In the Third Third proposed
rule, the Agency proposed two options
for the development of treatment
standards for multi-source leachate: (1)
Continued application of the treatment
standards developed for the underlying
wastes from which the leachate is
derived; or (2) establishment of one set
of wastewater standards and one set of
nonwastewater standards which would
apply to all multi-source leachate: See
54 FR 48481.
5. Alternative Treatment Standards for
Lab Packs
The Agency proposed an approach for
lab packs that establishes alternate
treatment standards expressed as
technologies for those lab packs meeting
certain criteria. In particular, EPA
proposed incineration as the alternative
treatment standard for lab packs
containing certain characteristic waste
and listed organic hazardous waste
codes only, and stabilization for lab
packs containing certain EP toxic metals
only. The proposed approach was
intended to provide administrative relief
and simplify the management system for
lab pack wastes, because the treatment
residue for these wastes would not need •
to be analyzed for compliance with
individual treatment standards. See 54
FR 48470.
8. Applicability to Mineral Processing
Wastes
On September 1,1989 (54 FR 36592),
EPA narrowed the scope of the RCRA
exclusion for solid wastes from the
extraction, beneficiation, and processing
of ores and minerals, limiting this
exclusion to 25 high volume/low toxicity
wastes. On January 23,1990 (55 FR
23227), the Agency removed five
additional wastes from the exclusion
based upon additional volume and/or
hazard data. In the Third Third
proposal, EPA proposed to consider the
wastes that were removed from the
exclusion to be "newly identified" for
the purposes of these provisions, and
further proposed not to apply the
treatment standards for characteristic
wastei to such wastes. Therefore, these
wastes would not be subject to the
BDAT treatment standards for
.characteristic wastes. See 54 FR 48492
7, Clarification of "P" and "U" Solid
Wastes
The Agency proposed to modify the
existing language of 40 CFR 261.33 to
include residues of 40 CFR 261.33(11
materials remaining in containers and in
inner liners, in addition to 40 CFR
26l.33[e) residues already included in
the scope of the commercial chemical
product listings.
EPA also proposed that soils and spill
residues contaminated with 40 CFR
261.33(d) wastes be considered to be
solid wastes unless they are recycled
within 90 days of the spill, regardless of
intent to recycle hi the future. See 54 FR
48493,
8. Treatment/Disposal Facility Testing
Requirements
EPA proposed revisions to the facility
testing requirements contained in 40
CFR 264.13(8), 265.13(8), 288.7(b), and
288.7(c). Specifically, the Agency
proposed two approaches to specify
under what circumstances EPA may
require the owner/operator of a
treatment or disposal facility to analyze
a representative sample of a waste: (1)
State that the generator may supply
waste analysis information only if an
EPA approved waste analysis plan
allows the generator to do so; or (2)
state that the owner/operator is
required to test the waste a minimum of
once a year, and that the Regional
Administrator may require more
frequent testing, through the waste
analysis plan on a site-specific basis.
See 54 FR 48497.
9. Testing of Wastes Treated in 90-Day
Tanks or Containers .
Under 40 CFR 288,7(b), treatment
facilities treating prohibited hazardous
wastes must test the treatment residues
that they generate at a frequency
determined by their waste analysis plan
in order to ascertain compliance with
the applicable treatment standards.
There is a regulatory gap, however, with
respect to treatment of prohibited
wastes that is conducted in 90-day tanks
or containers regulated under { 262.34.
This is because such tanks or containers
are not subject to a waste analysis plan
requirement. To close this regulatory
gap, EPA proposed that persons treating
prohibited wastes in such tanks and
containers must prepare a plan
justifying the frequency of testing based
on a detailed analysis of a
representative sample of the prohibited
waste. The plan must contain all
information necessary to treat the waste
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in accordance with part 2B8, and must
be retained as a facility record. See 54
FR 48497.
10. Generator Notification Requirements
EPA proposed to clarify 40 CFR 268.7
by allowing generators to reference the
treatment standards in 40 CFR 260.41,
265.42, or 285.43, Such a reference must
include the EPA Hazardous Waste No.,
the treatability group(s) of the waste(s),
and the CFR section where the
treatment standards appear. The
Agency also proposed to amend 40 CFR
268.7 to allow a one-time notification
and certification requirement for small
quantity generator (SQG) shipments
subject to tolling agreements. See 54 FR
48498.
11. Storage Prohibition
Section 3004(j) of RCRA provides that
storage of prohibited hazardous waste is
itself prohibited "* * * unless such
storage is solely for the purpose of the
accumulation of such quantities of
hazardous waste as are necessary to
facilitate proper recovery, treatment, or
disposal" (40 CFR 268,50(ap) and 51 FR
1709). The Agency proposed an
interpretation of this section such that
the storage prohibition does not apply
where storage precedes legitimate,
protective treatment, or recovery. See 54
FR 48498.
12, Applicability of California List
Prohibitions After May 8,1990
The Agency outlined three situations
where the California List is still
applicable: (1) Liquid hazardous wastes
that contain over 50 ppm PCBs, where
PCBs are not a regulated constituent In
the treatment standards; (2) HOC-
containing wastes identified as
hazardous by a characteristic property
that does not contain HOCs; and (3)
liquid hazardous wastes that exhibit a
characteristic and also contain over 134
mg/1 of nickel and/or 130 mg/1 of
thallium.
The California list regulatory and
statutory prohibitions are superseded by
more specific prohibitions and treatment
standards. However, EPA solicited
comment on a national capacity
variance (to May 8,1992) for injected
corrosive wastes, but did not propose a
capacity variance for corrosive wastes
disposed of in surface impoundments.
The legal basis for this approach was
that without it, in the case of a waste
which received a national capacity
variance under the California list rule,
EPA would effectively grant a national
capacity variance far • California list
waste for longer than two years. EPA
also proposed to modify the language of
40 CFR 2R8.32(h) to ensure that there are
no periods of time in which neither the
California list or superseding HOC
standards would operate. See 54 FR
48488.
II, Summary of Today's Final Rule
Today's final rule is the fifth
rulemaking required under the land
disposal restrictions program as outlined
in the 1984 Hazardous and Solid Waste
Amendments to RCRA. The Agency is
required to promulgate regulations
establishing conditions under which the
Third Third wastes included in 40 CFR
268.12 may be land disposed by the
statutory deadline of May 8,1990.
A. Applicability of Today's Final Rule
The Agency today is promulgating
treatment standards and effective dates
for all Third Third wastes, including
wastes exhibiting a characteristic as
described in 40 CFR 261.21-261.24 (see
sections IHA.3 and III.A.4J. The Agency
also is promulgating treatment
standards and effective dates for all
First and Second Third soft hammer
wastes (previously subject to the
requirements of 40 CFR 268.8).
In previous rulemakings, the Agency
amended the schedule so that certain
First and Second Third wastewoter
residues, derived-from wastes (i.e.,
multi-source leachate), and mixtures of
scheduled hazardous/radioactive
wastes were moved to the Third Third
of the schedule (see 53 FR 31214.
I 288.12 (b), (c), and (d); S4 FR 8264; and
54 FR 26648, § 268.12 (b) and (c)). The
Agency today is promulgating treatment
standards for these wastes. In addition,
the Agency is promulgating treatment
standards for five newly listed wastes
(i.e., wastes listed after enactment of the
Hazardous and Solid Waste
Amendments of 1984); four wastes that
fall into the F002 and FOC5 (spent
solvent) waste codes, and F025.
In the Second Third rulemaking, the
Agency solicited comments, data, and
specific suggestions regarding the
regulation of lab packs. In today's rule,
the Agency is promulgating alternate
treatment standards expressed as
specified technologies for lab packs
meeting certain criteria.
1. Three-Month National Capacity
Variance for Third Third Wastes
The Agency is granting a three-month
national capacity variance for all wastes
effected by this rule, based on the time
required for the regulated community to
make adjustments necessary to comply
with the new regulations. The
prohibitions en land disposal In thia
final rule, therefore, will be effective on
August 8,1990, During the period
between May 8,1990, and August 8,
1930, wastes (that do not meet the
treatment standards) disposed in
landfills or surface impoundments, must
be disposed in units that meet the
minimum technological requirements set
out in 40 CFR 26B.5(h)(2), and must
comply with the California list
prohibitions, where applicable. Sea 52
FR 25760, July 8,1987. In addition, the
reccrdkeeping requirements of 40 CFR
268,7 (a)(3) and (b)(6) apply to all Third
Third wastes during the three-month
national capacity variance. See section
Ht.C of today's preamble for a
discussion of this capacity variance.
2. Hazardous Waste Injection Wells
Regulated Under 40 CFR Part 148
The Agency has, on occasion,
proposed and promulgated regulations
and effective dates for underground
injected hazardous wastes covered
under RCRA sections 3004 (f) and (g)
separately from regulations addressing
wastes disposed in surface facilities.
EPA is addressing all methods of land
disposal of wastes in today's
rulemaking, including hazardous waste
injection wells regulated jointly under
the Safe Drinking Water Act (SDWA)
and RCRA.
3. Remaining Scheduled Listed
Hazardous Wastes
Today's final rule establishes
treatment standards and effective dates
for those listed hazardous wastes
included in 40 CFR 288.10-208.12 for
which treatment standards have not
been promulgated to date. In section
III.A, the Agency identifies the waste
treatability groups by waste code and
identifies the best demonstrated
available technology (BDAT) for each.
Treatment standards applicable to each
treatability group are based on the
performance levels achievable by the
BDAT identified for each group. The
Agency reiterates that any technology
not otherwise prohibited (e.g.,.
impermissible dilution] may be used tu
meet the concentration-based treatment
standards.
In addition, EPA is re-scheduling
wastes from the petroleum refining
industry, K048-K052, to the Third Third,
and promulgating revisions to existing
treatment standards for these wastes.
The Agency is also rescinding all
existing treatment standards expressed
as "no land disposal" for
nonwastewaters. A detailed discussion
of the revised treatment standards for
these wastes may be found in section
III.A.
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22530 Federal Register / Vol. i5, No. 106 / Friday. June 1, 1990 / Rules and Regulations
4. Characteristic Hazardous Wastes
In today's final rule, EPA is
promulgating treatment standards and
effective dates for hazardous wastes
that exhibit one or more of the following
characteristics: Jgnitibility, corrosivity,
reactivity or EP toxicity (40 CFR 261.21-
261.24), In the November 22,1989 notice,
the Agency proposed treatment
standards based on the performance of
best demonstrated available technology
without regard to the characteristic
level. The standards, however, were
transferred from treatment of listed
wastes, which after evaluating data
submitted by commenters, proved
unachievable for characteristic wastes.
The Agency today is promulgating
treatment standards for these wastes
that have been revised to reflect data
from treating characteristic wastes
submitted during the comment period.
These newly-submitted data show wide
variability in the wastestreams. Today's
final rale establishes treatment
standards for the characteristic wastes
in one of four forms: (1) A concentration
level equal to or greater than the
characteristic level for the EP toxic
metals; (2} a specified treatment
technology; (3) a treatment standard of
"deactivation" to remove the
characteristic, with guidance on
technologies the Agency believes will
remove the characteristics (see
appendix VI to part 268]; or (4)
treatment to concentration levels below
the characteristic level (typically where
the standard can be based on a
treatment technology that is not matrix-
dependent, or the Agency has sufficient
data to find achievability). In addition,
the Agency believes that by specifying
technologies for certain of the
characteristic wastes (i.e., incineration
of high-TOC ignitible nonwastewaters
and EP toxic pesticide wastewaters), it
is requiring treatment below the
characteristic levels for wastes where
such treatment is technically achievable.
A detailed discussion of the treatment
standards promulgated for the
characteristic wastes is provided in
sections III.A.2. IU.A.3 and OLD of
today's preamble,
5. Characteristic Wastes Regulated
Under the Safe Drinking Water Act
(SOW A) and the Clean Water Act
(CWA) and RCRA
Today's final rule limits the
applicability of certain provisions of the
land disposal restrictions' framework to
characteristic wastes subject to
regulation under the Clean Water Act
(i.e.. discharges permitted under the
NPOES or POTW pretreatment
regulations), and to characteristic
wastes managed in systems which
discharge to Class I underground
injection wells subject to regulation
under the Safe Drinking Water Act
First, the LDR dilution prohibition does
not apply to characteristic wastes
managed in NPDES or pretreatment
systems and subsequently discharged
under CWA regulations, unless a
method of treatment is specified.
Second, the LDR dilution prohibition
does not apply to wastes disposed of in
Class I underground injection wells.
Third, where a specified technology is
the treatment standard for a
characteristic waste, the method need
not be utilized if the waste is disposed
of in a Class I injection well.
Characteristic wastes that are exempt
from the dilution prohibition and which
are managed and disposed of on-site,
are not subject to the Ml § 268.7
requirements for waste analysis and
recordkeeping. The Agency believes that
this action is necessary to successfully
integrate RCRA and SDWA programs;
the underlying rationale for these
decisions is provided in section III.D of
today's preamble.
6. Mineral Processing Wastes
On September 1,1989 and January 23,
1990, EPA published final rules in the
Federal Register (54 FR 36592 and 55 FR
2322, respectively) that removed a
number of mineral processing wastes
from the so-called "Bevill Exclusion."
RCRA section 300l(b)(3)(A)(ii) excludes
from the hazardous waste regulations,
pending completion of studies by the
Agency, solid wastes from the
extraction, beneficiation, and processing
of ores and metals.
All of these previously excluded
mineral processing wastes that exhibit
one or more of the characteristics of
hazardous waste will be subject to the
hazardous waste regulations when the
final rules become effective March 1,
1990, and July 23,1990.
EPA believes that these wastes are
"newly identified" for the purposes of
determining applicability of the land
disposal prohibitions. Although
technically the wastes are not being
identified by a new characteristic, they
are being brought into the subtitle C
system after the date of enactment of
HSWA on November 8,1984. The
Agency, therefore, is clarifying in
today's final rale that these newly
identified mineral processing wastes are
not subject to the BOAT treatment
standards promulgated today for
characteristic hazardous wastes. A
detailed discussion is provided in
section III.H.
A Implementation of Requirements for
Characteristic Wastes
In today's final rule, the Agency is
promulgating several new provisions,
and revising existing regulations to
implement the treatment standards for
characteristic wastes.
1, Overlap of Standards for Listed
Wastes That Also Exhibit a
Characteristic
The Agency today is promulgating its
proposed approach with respect to
determining applicable treatment
standards for wastes that carry more
than one waste code. Specifically,
wastes that carry more than one
characteristic waste code must be
treated to meet the treatment standard
for each characteristic; listed wastes
that also exhibit one or more hazardous
characteristics must be treated to meet
the treatment standard for each of the
waste codes, unless the characteristic
constituent or property is specifically
addressed in the treatment standard for
the listed waste. Finally, EPA is
specifying that disposal of a waste that
exhibits a characteristic at the point of
disposal is prohibited unless the
treatment standard for that
characteristic component is above the
characteristic level. See section IH.E.l
for a more detailed discussion.
2. Revisions to Waste Identification
Requirements
Section 282.11 of 40 CFR currently sets
out an either/or scheme where, if the
generator determines that a waste is
listed, the generator does not need to
determine whether the waste exhibits a
characteristic. The Agency is amending
§ 262.11 to indicate that generators must
determine whether listed wastes also
exhibit characteristics of hazardous
waste for purposes of compliance with
40 CFR part 268. In addition, the Agency
is amending |§ 261.21 through 261.24 to
indicate that wastes that carry
characteristic waste codes may also be
listed wastes. See section III.E.2 of
today's preamble.
3, Wastes Subject to a Capacity
Variance
EPA is clarifying the requirements
that are applicable to characteristic
wastes during the period of a capacity
variance. Under the present rule, it is
possible for prohibited characteristic
wastes which are subject to a national
capacity variance to become
nonhazardous. If, during the period of
the variance the waste is treated to be
nonhazardous, arguably the landfill or
impoundment unit would have to meet
minimum technological requirements.
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OSWER DIR. NO. 9541.00-14
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Federal Register / Vol. 55, No. 106 / Friday, June 1, 1990 / Rules and Regulations
22531
EPA does not read the statute or the
rules this way, and is making this
clarification in section IILE.3 of today's
preamble.
4. Use of TCLP v. EP Analytical Methods
for Compliance
EPA is establishing treatment
standards for several characteristic
wastes at the characteristic level, and
has determined that this level should be
measured by the TCLP. This is the
protocol which large quantity generators
will use to assess the toxicity of their
wastes starting on September 25,1990
(small quantity generators are subject to
the revised testing protocol on March 29,
1990), and it is the protocol used to
measure the efficacy of stabilization or
other immobilization treatment in most
of the BOAT standards. A detailed
discussion is provided in section III.E.4.'
5. Newly Identified Toxicity
Characteristic (TC) Wastes
EPA is clarifying that wastes that
exhibit the TC but not the EP are not
presently prohibited, even if the
constituent causing the waste to exhibit
the TCLP is also a constituent controlled
by the EP, This point is also discussed in
section IILE.5 of today's preamble.
In addition, EPA is clarifying that for
hazardous wastes that are subject to
more than one treatment standard,
during the period of a national capacity
variance for one of the wastes, the
treatment standards for any other waste
codes that have not received such an
extension must be met. As indicated in
previous ruletnakings, hazardous wastes
that are subject to a capacity extension
and contain California list constituents
must comply with the California list
prohibitions. See 53 FR 31188. A detailed
discussion is provided in section 1II.E.3
of today's preamble.
B. Further Principles Governing
Applicability
The Agency notes that the issues in
this rulemaking concerning when
hazardous wastes become prohibited
from land disposal do not change the
status of other regulatory or statutory
inclusions or exclusions to the definition
of solid or hazardous waste found at 40
CFR 261.2-261.8. These provisions can
override the LDR point of generation
evaluation to keep wastes from being
prohibited and subject to a dilution
prohibition or treatment standard.
Further, those who manage hazardous
waste will need to assess what LDR
prohibitions apply at different points in
the waste management process. The
question of whether a given waste is "
going to prohibited land disposal is
complicated by the fact that wastes may
change form or treatability groups after
undergoing treatment. The Agency
explains these decision rules and
provides clarifying examples in section
III.E.6 of today's final rule.
C. Amended Tracking System for
Characteristic Prohibited Wastes
EPA's decisions concerning
characteristic wastes necessitate certain
modifications of the tracking provisions
contained in 40 CFR 268.7. These
changes are summarized below, and a
detailed discussion of each of these
provisions is provided in section III.F of
today's preamble.
1. Clarification of and Changes to
Generally Applicable Recordkeeping
Requirements
Most of the existing provisions of
I 268,7 contemplate that restricted
wastes are being shipped off-site for
treatment or disposal (see §§ 268.7 (a)(2)
and (a)(3), and §§ 268.7 (b){4) and
(b}(5)). The Agency is clarifying in -
today's rulemaking that for wastes
managed on-site, generators must
determine if the waste is restricted, and
keep some documentation of that
determination, plus some documentation
of where the restricted waste was
treated, stored, or disposed—whether
treatment, storage, or disposal occurs '
on-site or off-site. This requirement
applies to characteristic wastes, even
when the hazardous characteristic is
removed prior to disposal, or when the
waste is excluded from the definition of
hazardous or solid waste under 40 CFR
261.2-261.8, The Agency also notes that
those wastes exempted from all of part .
268 under 40 CFR 268.1 (b) and (e) are
not subject to any recordkeeping
requirements,
2. Tracking (i.e.. Notification/
Certification) Provisions Applicable to
Generators
EPA believes that the existing
tracking system requires some
modification for characteristic waste
that the generator has treated to meet
the treatment standard before it is sent
off-site (and therefore, in most cases
may be land disposed in a subtitle 0
facility). The Agency believes that under
the present rule, sending the tracking
forms to subtitle D facilities could have
counterproductive effects, and has
determined that the tracking forms
should not accompany shipments from
generators to subtitle D facilities. By
deciding that tracking documents for
prohibited characteristic wastes that no
longer exhibit a characteristic should
not go to these facilities, however, the
Agency is not deciding that notifications
and certifications should not be
prepared for such wastes. EPA believes
that the notifications and certifications
should be sent to the appropriate EPA
Regional Administrator or his delegated
representative, or to a state authorized
to implement the land disposal
restrictions. EPA is making some slight
modifications in the notification form
that would be sent to EPA (or to an
authorized State), because the existing
notification refers to the waste's ID
number and manifest number when
shipped, neither of which are available
for wastes no longer exhibiting a
characteristic. While the revised
notification form would not contain
hazardous waste codes, it must contain
a complete and accurate description of
the waste, including its former
hazardous waste classification, and
must identify the facility receiving the
waste. EPA is not amending the tracking
requirements for.those characteristic
wastes that still exhibit a characteristic
when they are sent off-site.
3. Tracking Provisions Applicable to
Treaters
EPA is adopting the same approach
for treaters of characteristic wastes as it
is for generators. Thus, tracking forms
for shipments of characteristic wastes
that meet a treatment standard, and no
longer exhibit a characteristic of
hazardous waste, would be sent to EPA
or to an authorized state.
4, Land Disposal Facilities
Under existing rules, subtitle C
disposal facilities receiving prohibited
wastes must keep copies of the
notification and certification prepared
by the generator and/or the treater,
must test wastes (or waste extracts) at a
frequency specified in their waste
analysis plan (as modified in today's
rule), and must-dispose of certain types
of wastes in minimum technology units.
40 CFR 288.7(c) (1), (2), and (3). These
requirements do not fit well for the
characteristic wastes prohibited in
today's rule. The Agency is thus
indicating that the requirements of
§ 268.7(c) do not apply to subtitle D
disposal facilities receiving wastes that
no longer exhibit a characteristic.
5. Changes in Certification to Reflect
Dilution Prohibition
EPA is amending the certifications of
compliance required of treaters and
generators in § 268.7 to state that the
treatment standard was not achieved by
a form of impermissible dilution.
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22532 Federal Register / Vol. 55. No. 106 / Friday, June 1, 1990 / Rules and Regulations
D. The Dilution Prohibition as It Applies
to Centralized Treatment
The existing rules on dilution and
EPA's interpretive statements regarding
those rules indicate that the dilution
prohibition has a two-fold objective: (1)
To ensure that prohibited wastes are
actually treated; and (2) to ensure that
prohibited wastes are treated by
methods that are appropriate for that
type of waste. EPA has acknowledged
that prohibited wastes which are
aggregated are not diluted
impermissibly if they are treated
legitimately in centralized treatment
systems, irrespective of the dilution
inherent in such a system. Thus, if
"dilution" is a legitimate type of
treatment, or a necessary pretreatment
step in a legitimate treatment system,
such dilution is permissible. Conversely,
prohibited wastes that are "treated" by
inappropriate methods, or sent to
treatment systems that do not treat the
wastes, are diluted impermissibly.
In applying these principles to
characteristic wastes, EPA encountered
two major difficulties; First, the
interface with regulatory systems
established pursuant to the Clean Water
Act and Safe Drinking Water Act, and
second, difficulties in being able to
quantify the proposal in a meaningful
way. Given these problems and
complications, EPA has decided that the
most constructive course is to provide
additional interpretive guidance on the
existing dilution prohibition contained
in § 268.3, and to explain more fully how
those rules would apply in specific
situations.
In all cases, the Agency has
determined that for non-toxic hazardous
characteristic wastes, it should not
matter how the characteristic property is
removed so long as it is removed. Thus,
dilution is an acceptable treatment
method for such wastes. In most cases.
EPA has determined also not to apply a
dilution prohibition to characteristic
wastes that are managed in treatment
systems regulated under the Clean
Water Act or the Safe Drinking Water
Act. However for aggregation of listed
wastestreams or toxic characteristic
wastestreams not included above, the
Agency is able to provide limited
additional guidance today on the issue
of when centralized treatment methods
involving dilution are permissible. As a
general rule, if the wastes are all
legitimately amenable to the same type
of treatment and this method of
treatment is utilized for the aggregated
wastes, the aggregation step does not
constitute impermissible dilution.
E. Treatment Standards for Multi-
Source Leachate
On February 27.198i, the Agency
amended the schedule for prohibiting
hazardous wastes from land disposal by
placing multi-source leachate derived
from hazardous wastes in the Third
Third (see 54 FR 3284). The Agency took
this step to study more fully the most
appropriate treatment standards for
such leachate. The Agency's original
approach to multi-source leachate was
that the leachate carries the waste
codes of all of the listed hazardous
wastes from which it is derived and,
therefore, is subject to each of the
prohibitions and treatment standards for
those wastes. In the event a particular
constituent in the leachate is present in
more ban one prohibited waste, the
stricter treatment standard would apply
(53 FR 31138, August 17,1988).
The Agency today is promulgating a
fixed set of wastewater treatment
standards and a set of nonwastewater
treatment standards for all multi-source
leachate and residues derived from the
treatment of multi-source leachate. The
Agency is promulgating treatment
standards for these wastes under EPA
Hazardous Waste Code No. P039. The
Agency has identified treatment levels
for the entire BOAT list of hazardous
constituents in the wastewater and
nonwastewater treatability groups.
The Agency is also specifying that
leachate derived solely from F020-F023
and FQ28-F028 (dioxin) wastes, and no
other listed wastes, is considered to be
single-source leachate and must comply
with the treatment standards for those
wastes and continue to be classified
under those waste codes.
The Agency is not promulgating
separate standards for multi-source
leachate that exhibits a characteristic of
hazardous waste because, by
promulgating standards for all of the
BOAT list constituents, the treatment
standards will address all of the
constituents and properties that the
treatment standards for characteristic
wastes address. Should multi-source
leachate or residues derived from the
treatment of multi-source leachate
exhibit a characteristic at the point of
disposal, however, it would have to be
treated to meet the treatment standards
for that characteristic. A detailed
discussion of the treatment standards
for multi-source leachate is contained in
section IIIA.6 of today's final rule.
F. Alternate Treatment Standards for
Lab Packs
The Agency is today promulgating
alternate treatment standards for lab
packs that contain certain prohibited
organometallic and organic wastes
specified in appendix IV and appendix
V to 40 CFR part 288, respectively. The
alternate treatment standards are
expressed as a specified technology for
each of the waste categories: (1)
Incineration followed by treatment to
meet the treatment standards for certain
EP toxic metals for the organometallic
wastes identified in appendix IV-, and (2)
incineration as a specified method for
the organic hazardous wastes identified
in appendix V. In addition, the Agency
is allowing certain unregulated wastes
to be included in lab packs utilizing the
alternate treatment standards. The
Agency is not promulgating the
proposed alternate treatment standard
for inorganic wastes due to concerns
about unverified stabilization of
variable waste streams.
The Agency believes that the
alternate treatment standards provide
some administrative relief, while
minimizing the threats posed by land
disposal of these small volumes of
hazardous waste. Section IILA.9 of
today's preamble contains a detailed
discussion of the alternate treatment
standards for these wastes.
G. Mixed (Hazardous/Radioactive)
Wastes
EPA is granting a two-year national
capacity variance under section
3004{h)(2) for mixed scheduled
hazardous/radioactive wastes subject to
today's rulemaking. The Agency bases
the national variance for these wastes
upon a determination that there i*
inadequate treatment capacity available
for these wastes. The Agency is
continuing to evaluate the volumes,
characteristics, and treatment options
for such wastes. A detailed discussion
of EPA's approach for mixed wastes
subject to today's rulemaking is
provided in section IILA.8 of today's
preamble.
The Agency is also establishing four
separate treatability groups for specific
types of mixed waste that could not be
treated with the technologies
determined to be BDAT for the
corresponding nonradioactive wastes.
The BOAT treatment standard for high-
level radioactive wastes generated
during the reprocessing of fuel rods is
vitrification. For radioactive lead solids,
the BDAT treatment standard is
macroencapsulatiQn. The BDAT
treatment standard for radioactive
elemental mercury is amalgamation. For
radioactive hydraulic oil contaminated
with mercury, BDAT is incineration.
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GSWER DIE. NO. 9541.00-14
Federal Register / Vol. 55, No. 106 / Friday, June 1, 1990 / Rules and Regulations 22S33
H. Nationwide Variances From the
Effective Date
Due to lack of sufficient treatment or
recovery capacity, EPA is promulgating
a two-year national capacity variance
for the surface-disposed and deep well-
injected hazardous wastes listed in
Tables 1 and 2, In addition to the wastes
listed in Tables 1 and 2, EPA is also
granting a two-year national capacity
extension to: mixed hazardous/
radioactive wastes; naturally occurring
radioactive materials that are mixed
with RCRA hazardous wastes; soil and
debris contaminated with Third Third
wastes for which the treatment standard
is based on incineration, mercury
retorting, vitrification, or wet-air
oxidation; and inorganic debris as
defined in | 2G8.2(a}(7) (which also
applies to chromium refractory bricks
carrying the EPA Hazardous Waste Nos,
K048-K052). The Agency is also granting
a six-month capacity variance to
nonwastewaters from the petroleum
refining industry, EPA Hazardous Waste
Nos. K04S-K052. See section III.B of
today's preamble for a detailed
discussion of this six-month capacity
variance.
Determinations of available capacity
are based on a comparison of the
volumes of wastes requiring treatment
to the amount of capacity available for
such treatment. Although EPA does not
require that BDAT technologies be used
to meet the applicable treatment
standards, unless otherwise specified,
EPA assesses available capacity by
evaluating the availability of
technologies identified as BDAT,
TABLE 1. SUMMARY OF TWO-YEAR NA-
TIONAL CAPACITY VARIANCES FOR SUR-
FACE-DISPOSED WASTES '
TABLE 1. SUMMARY OF TWO-YEAR NA-
TIONAL CAPACITY VARIANCES FOR SUR-
FACE-DISPOSED WASTES 1M3ontinued
Heoui'ed
alturnanvs
treatment
technology
Acid Leaching and
Chemical
Precipitation.
Combustion of
Sludge/Solids.
Mercury Retorting....
Waste code/
physical form
D009
K108
P06S
P092
U151
F039*
K048>
K049
KOSO
K05J
K052
D009
K106
Low Mercury
Nonwastewater.
Low Mercury
Nonwastewater.
Low Mercury
Nonwastewater.
Low Mercury
Nonwastewaler.
Lew Mercury
Nonwastewater,
Nonwastawater.
Nonwastewatar.
Nonwastewater.
Nonwastewater.
Nonwaslewater.
Nonwastewttar,
High Mercury
Nonwistewater.
High Mercury
Nonwastewater.
Required
alternative
treatment
technology
Secondary
Smelling.
Thermal Recovery ..
Vitrification . ....
poes
P092
U151
DOOS
P087
OC04
K031
K084
KiOi
K102
P010
P011
P012
P036
P038
U138
Waste cods/
physical form
High Mercury
Nonwastewater.
High Mercury
Nonwestewatar,
High Mercury
Nonwastewater.
Lead Materials
Stored before
Secondary
Smelling.
Nonwastewater/
wastewatv,
Nonwastewator.
Nonwastewater,
Nonwastewater,
Nonwastewater.
Nonwastewater.
Nonwastewater.
Nonwastewater.
Nonwastewater.
Nonwastewater.
Nonwaslewater.
Nonwastewater.
1 EPA is granting these wastes • two-year national
capacity variance, except for K048-K052 non-
wastswaters. This table does not include mixed
radioactive wastes, certain contaminated soil and
debris, or inorganic debris as defined in 268.2(a)(7)
which are receiving two-year national capacity var-
iances.
1 Multi-source Leachate.
'For KQ48-KOS2 petfoteurrwefining non-
wastewaters, EPA Is granting a six-month variance.
TABLE 2. SUMMARY OF TWO-YEAR NA-
TIONAL CAPACITY VARIANCES FOR UN-
DERGROUND INJECTED WASTES
Required
alternative
treatment
technology
Acid Leaching and
Chemical
Precipitation.
AIRailine
Chlorination.
Chemical Oxidation
followed by
Chemical
Precipitation.
Chemical Oxidation
followed by
Chromium
Reduction and
Chermcal
Precipitation.
Chromium
. Reduction
followed by
Chemical
Precipitation.
Mercury Retorting „..
Neutralization _..
Wei-Air Oxidation
Waste code/
physical form
0009
0003 «
0003 •
DC03»
0007
DOOS
DOG2"
K011
K013
K014
Low Mercury
Nonwastewater.
Wastewator/
Nonwastewater.
Wastswater/
Nonwaslewater.
Wastewater/
Nonwastewaler.
Wastewater/
Nonwastewater.
Nonwastewater,
Wastewatsr/
Nonwastewater.
Wastawat*r,
Waste water.
Wastewater/
Nonwastewater,
TABLE 2. SUMMARY OF TWO-YEAR NA-
TIONAL CAPACITY VARIANCES FOR UN-
DERGROUND IMJECTED WASTES—Con-
tinued
Required
alternative
treatment
technology
Wet-Air Oxidation
Followed by
Carbon
Adsorption
Followed by
Chemical
Precipitation;
Biological
Treatment
Followed by
Chemical
Precipitation.
Wast* code/
physical form
FQ39*
Wastewatar.
1 D003 (Cyanides).
1D003 (Sulfides).
3 D003 (Explosives, water reactivss, and other
reactive*},
' Oeepwell Injected D002 liquids with a pH less
than 2.0 must meat the California list prohibitions on
August 8.1890.
' Multi-Source Leachate.
I. Generator Notification Requirements
The generator notification
requirements set forth in 40 CFR 268.7
specify that when the generator has
determined that the waste is restricted
and does not meet the applicable
treatment standards, the generator must,
with each shipment of waste, notify the
treatment facility in writing of the
appropriate treatment standards. This
notice must include, among other items,
the applicable treatment standard and
all applicable prohibitions set forth in
1288.32 or RCRA section 3Q04(d). If the
waste being shipped is restricted, but
can be land disposed without further
treatment, the generator must submit to
the land disposal facility the same
information, as well as a certification
stating that the waste meets the
applicable treatment standards {40 CFR
268.7(a)(2)).
In today's final rule, the Agency is
amending § 268.7 to allow referencing of
the treatment standards. The following
information must be included in the
reference: EPA Hazardous Waste
Number, the subcategory of the waste
code [e.g., D003, reactive cyanide
subcategory), the treatability group(s) of
the wastc(s) (e.g., Wastewater or non-
wastewater), and the section where the
treatment standards appear. This
change does not apply to spent solvents
{FQ01-F005), multi-source leachate
(F039), or California list wastes because
these waste categories each contain a
number of Individual constituents or
waste groups.
In addition, the Agency is amending
§ 208,7 to allow a one-time notification
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Federal Register / Vol. 55, No, 108 / Friday, June 1, 1990 / Rules and Regulations
and certification for SQG shipments
subject to tolling agreements, A detailed
discussion of these changes is provided
in section III.I of today's preamble.
/, Waste Analysis Plans and Treatment/
Disposal Facility Testing Requirements
The Agency today is promulgating
modifications to the waste analysis plan
requirements which incorporate
elements of both approaches proposed
on November 22,1989. Under the final
approach, treatment and disposal
facilities must conduct periodic detailed
physical and chemical analyses of their
wastestreams to assure that the
appropriate 40 CFR part 268 treatment
standards are being met. Today's final
rule amends the comment in 40 CFR
264.13(aJ(2J and 285,13(a)(2) to clarify
that the generator or treater may supply
part of the waste analysis information,
and that waste analysis requirements
are not superseded if the treatment or
disposal facility is supplied information
by the generator or treater. See section
III.) for a detailed discussion.
K. Testing of Wastes Treated in 90-Day
Tanks or Containers
The Agency is promulgating testing
requirements for wastes treated to
comply with the BOAT treatment
standard in so-called 90-day tanks (or
containers] as proposed. A regulatory
gap existed widi respect to treatment of
prohibited wastes in such tanks or
containers regulated under § 262.34
because they were not subject to the
waste analysis plan requirements. Thus,
there was no regulatory vehicle for
determining testing frequency in such
circumstances.
In order to close this regulatory gap,
EPA is requiring that persons treating
prohibited wastes in such tanks and
containers must prepare a plan
justifying the frequency of testing that
they choose to adopt. The Agency is
also clarifying that these wastes are
subject to the 40 CFR 268.7
recordkeeping requirements. A detailed
discussion of these requirements is
provided in section UI.K of today's
preamble.
L. Clarification of "P"and "U" Solid
Wastes
The Agency is amending 40 CFR
26l.33(c) to clarify the regulations
pertaining to "P" and "U" hazardous
wastes. The amendment will add
residues of | 261.33(f) materials
remaining in containers and in inner
liners to the residues already included in
the scope of the commercial chemical
product listings. The existing regulatory
language is partially in error, and the
Agency is correcting it with today's
revisions.
In the November 22,1989 proposal, the
Agency also proposed amendments to
§ 261.33 regarding soil, water and spill
debris contaminated with § 261.33 (e)
and (f) (P and U wastes) materials.
Specifically, the Agency proposed that
residues of spills of commercial
chemical products will be considered
solid waste if they are not recycled
within 90 days of the spill. The Agency
has decided not to promulgate this
revision as the desired effect can be
achieved through interpretation of
existing regulations.
Finally, during the comment period,
several commenters requested
clarification of the exception to the
mixture rule for de minimi's losses of "P"
and "U" wastes (§ 261.3(a)(iv)(D}) to
underground injection units. Today's
notice provides this clarification. A
detailed discussion of these issues is
provided in section III.L of today's final
rule.
M Storage Prohibition
Section 3004(f) provides that storage
of prohibited hazardous waste is
prohibited " * * * unless such storage
is solely for the purpose of the
accumulation of such quantities of
hazardous waste as are necessary to
facilitate proper recovery, treatment or
disposal." See § 268.50f.ap), and 51FR
1709, January 14.1988. This language
applies only to storage of prohibited
wastes in non-land based storage units
[e.g., tanks and containers), as land-
based storage is a form of disposal. In
the November 22,1989, notice, the
Agency proposed an interpretation that
the storage prohibition does not apply
where storage precedes legitimate,
protective fre«tmenl, recovery, or
disposal. The Agency is not pursuing a
definitive reinterpretation in today's
final rule as proposed. The Agency
continues to believe, however, that the
statutory prohibition was designed to
prevent the use of storage as a means of
avoiding a treatment standard, and will
continue to enforce the storage
prohibition with that intention in mind.
EPA is aware of the difficulties posed by
the applicability of the section 3004(j)
storage prohibition to mixed
(radioactive/hazardous) wastes, as
there is little disposal or treatment
capacity available. EPA is further
evaluating the legal, policy and factual
issues relevant to these wastes, and
expects to issue policy on these issues
within the next 90 days. A detailed
discussion is provided in section III.M of
today's preamble.
N, Case-by-Case Extension Petitions
In granting a case-by-case extension,
there is a statutory requirement that a
binding contractual commitment to
construct or otherwise provide
alternative treatment, recovery, or
disposal capacity that meets the
treatment standards be in place. RCRA
section 3004(h){3). EPA today is
clarifying that this requirement may be
satisfied by EPA proposing to grant a
no-migration petition or a treatability
variance. See preamble section III.N for
a more detailed discussion.
O. Applicability of California List
Prohibitions After May 8,1990
With the promulgation of the Third
Third final rule, almost all of the
California list prohibitions will be
superseded by more specific
prohibitions and treatment standards
when they become effective.1 The only
continued applicability of the California
list appears to be (1) for liquid
hazardous wastes that contain over 50
ppm PCBs; (2) for HOC-containing
wastes identified as hazardous by a
characteristic property that does not
involve HOCs, as, for example, an
ignitable waste that also contains
greater than 1000 ppm HOCs (but not an
EP toxic waste that exhibits the
characteristic because it contains one of
the six chlorinated organic pesticides
covered by the EP toxicity
characteristic); and (3) for liquid
hazardous wastes that exhibit a
characteristic and also contain over 134
mg/1 of nickel and/or 130 mg/1 of
thallium.
Today's final rule also addresses
several issues that were raised in the
November 22,1990, proposal. First, EPA
is restating that the California list
prohibitions apply to wastes that
receive national capacity variances in
later ruleraakings. The Agency believes
these more general prohibitions serve as
a minimum requirement. EPA notes,
however, that the California list
prohibitions do not apply to newly listed
or identified wastes {i.e., wastes
identified or listed after November 8,
1984) as the statute does not compel a
contrary interpretation, A more detailed
discussion of these issues appears in
section IILO of today's preamble.
P, Analysis of Treated Wastes
The Agency today is using the same
approach to waste analysis promulgated
in the First and Second Third final rules
1 See S2 FR 29993 (Auguit 12,1917) «nd 52 FR
25773 (July 8,1987): set also «Q CFR 268.32(h) (HOC
prohibition supeneded by treatment standard and
effective date for a particular HOC),
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Federal Register / Vol. 55, No. 106 / Friday, June I, 1990 / Rules and Regulations 22535
(53 FR 31148 and 54 FR 26594). (The
fohowing discussion and later preamble
discussion are included for purposes of
information and do not reopen the issue
for judicial review.) Where BOAT is a
destruction or removal technology, a
total waste analysis is required because
it is most appropriate for measuring
such destruction or removal. The
legislative history indicates a strong
preference for treatment that destroys
hazardous constituents (see, e.g., 130
Cong. Rec., S9179, daily ed. {uly 25,1984,
statement of Senator Chafee), and the
only reliable way to verify that
destruction has occurred is to measure
the total waste. Similarly, where BOAT
is identified as an immobilization
technology such as stabilization,
analysis of a TCLP waste extract is
required because it is the most
appropriate measure of immobilization.
In cases where both technologies are
identified as BOAT, both types of waste
analysis are required.
In order to determine whether the
waste meets the applicable treatment
standards as generated, the original
generator should perform an analysis of
the waste. The waste extract is
analyzed if the applicable treatment
standards appear in 40 CFR 268.41, and
a total waste analysis is performed if the
applicable treatment standards appear
in § 268.43. The generator may also
make this determination based on
knowledge of the waste, provided there
is a reasonable basis for doing so (for
example, the generator uses so little of a
key constituent that it could not be
found in the waste at levels exceeding a
treatment standard). All supporting data
used to make the determination must be
retained on-site in the generator's files.
See 40 CFR 288.7(a)(i), The Agency has
discussed this principle in past
rulemakings. and is repeating it here for
the reader's convenience.
Q. Practical Quantitation Limits (PQLs)
As noted above, where BDAT is
based on a destruction/removal
technology, total waste analysis is
performed to measure compliance with
the BDAT levels. Several commenters
have raised concerns that, in certain
cases, analytical problems may prevent
demonstrating compliance with the
treatment standards. They contend that
the BDAT concentration levels are, in
some cases, below the practical
quantitation limit (PQL)—the lowest
level of quantitation that the Agency
believes a competent laboratory car.
reliably achieve.
The Agency is currently developing
guidance material on waste analysis
which the Agency believes will resolve
many of these problems. In the interim,
the Agency believes that where a waste
has been treated with a combustion
BDAT process (i.e., incineration or fuel
substitution unit), and if the person has
made a good faith effort to achieve the
maximum analytical sensitivity, in
certain cases the Agency will consider
the person to have demonstrated
compliance with the treatment standard
for the respective organic constituents in
the waste. For a more complete
discussion of these issues, see section
III.A.1 of today's final rule.
R. Best Demonstrated Available
Technologies (BDAT)
Today's rule defines waste treatability
groups by waste code, and identifies the
Best Demonstrated Available
Technology (BDAT) for each waste code
within the treatability group (see section
IILA.l). Treatment standards are based
on the performance levels achievable by
the BDAT identified for each waste
code. Any technology not otherwise
prohibited (e.g., impermissible dilution)
may be used to meet the concentration-
based treatment standards. Where
treatment standards are expressed as a
technology, the waste must be treated
using the specified technology prior to
land disposal.
5. Reformatting of Treatment Standard
Tables and Addition of Appendix VII to
Part 268, Effective Dates for Prohibited
Wastes
The Agency is reformatting all of the
tables of treatment standards in 40 CFR
part 268 subtitle D and is providing the
subpart D treatment standard tables in
their entirety, including both previously
promulgated standards and the
treatment standards, being promulgated
today. The reformatted tables (i.e., 40
CFR 268,41, 268.42, and 268.43) are
arranged a-'- 'irding to waste code in
alphanumeric; order and include the
CAS number identifying each regulated
constituent, whether the standard is
based on analyses of grab or composite
samples, cross-references, and several
other clarifying features that will make
determining applicable treatment
standards easier for the reader. The
treatment standards finalized for the
first time today are included in the
tables. No substantive changes are
being made to the treatment standards
that were previously promulgated in the
November 7,1986, the July 8,1987, the
August 17,1988, and the June 23,1989,
final rules except as discussed in other
preamble sections of today's rule; (As
an example, regulated constituents are
being added to the wastes KQ48-K052,
as well as F002 and FOOS, wastes for
which certain treatment standards were
previously promulgated. See preamble
section III.A.4.a. for a discussion of F002
and FOOS and section III.A.4.0. for a
discussion of K048-KOS2.)
In addition, the Agency is providing a
complete list of waste codes regulated to
date under the land disposal restrictions
(including the waste codes included in
today's rulemaking), as appendix VII to
part 268. The appendix is provided for
the reader's convenience; no substantive
changes have been made to the dates,
except as discussed in the preamble of
today's rule,
T. Relationship of Hazardous Wests
Treatment Council v. EPA to Treatment
Standards Promulgated in Today's Final
Rule
A number of commenters raised the
issue of whether the treatment
standards being adopted are below
levels at which threats to human health
and the environment are minimized,
citing portions of the recent opinion
Hazardous Waste Treatment Council v.
EPA, 886 F.2d 355 (D.C. Cir. 1989)
(HWTC III). In that case, the Court
upheld EPA's existing technology-based
approach to establishing treatment
standards as a reasonable construction
of the statute, but remanded the case to
the Agency in order for the Agency to
. explain properly why it had chosen this
approach. EPA's explanation was
published in the Federal Register on
February 28,1990, and was accepted by
the Court, which dismissed all petitions
for review on March. 15,1990 The
standards EPA is adopting in this rule
are also technology-based, which the
Agency believes is warranted at this
time due to the uncertainties associated
with hazardous waste land disposal and
the Agency's present inability to
quantify precisely de minimi's levels of
hazardous constituents that would
determine when threats to human health
and the environment from disposal of
prohibited wastes are minimized. 55 FR
6642. Further discussion of this point
may be found in section III.A.1.1 of
today's preamble. As discussed in
section OLD, EPA believes that HWTC
III is not dispositive on the issue of
appropriate treatment standards for
characteristic wastes,
1II.A, Detailed Discussion of Today's
Final Rule
1. Development and Identification of
Treatment Standards
Today's rule promulgates treatment
standards for the remaining Third Third
scheduled wastes, and for the First
Third and Second Third wastes which
heretofore were subject to the "soft
hammer" provisions of 40 CFR 268.8.
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22536 Federal Register / Vol. 55. No. 106 /Friday, June 1, 1990 /Rules and Regulations
Development and identification of the
treatment standards are presented on a
waste code basis in sections ffl.A.2.
through II1.A.5. of today's notice. Section
ffl.A.8. presents the development of
treatment standards for wastes
identified as F039, multi-source leachate.
Section ffl.A.7. discusses the
applicability of today's treatment
standards to contaminated soil and
debris. Section UI.A.8. presents the
Agency's approach to regulating
radioactive waste that is mixed with
hazardous wastes.
The following discussion has
appeared in previous preambles and is
being repeated here as an aid to the
reader's understanding of the land
disposal restrictions program.
Comments were not solicited in the
proposed rule on the following
discussion; however, comments were
received pertaining to various issues
discussed below. These comments, and
the Agency's responses, are found in the
Response to BDAT-Related Comments
Document, Volume 1, in the RCRA
Docket.
a. The BOAT Methodology
The first step in the development of
treatment standards is to divide the
wastes to be regulated into groups
based on similar physical and chemical
properties. These waste treatability
groups take into account differences in
the applicability and effectiveness of
treatment for those particular wastes.
The Agency initially decides how
wastes should be grouped by examining
whether the wastes are generated by
similar industries or from similar
processes. This is a valid starting point
because the waste characteristics that
affect treatment performance are
expected to be similar for these wastes
even though the wastes themselves are
somewhat different.
The next step in the development of
treatment standards is to identify the
Best Demonstrated Available
Technology (BOAT) for each treatability
group. A treatment technology is
considered to be "demonstrated"
primarily based on data from full-scale
treatment operations that are currently
being used to treat the waste (or a
similar waste). Once the
"demonstrated" technologies have been
Identified, the Agency determines
whether these technologies may be
considered "available". To be
"available", the technology itself or the
services of the technology must be able
to be purchased, and the technology
must substantially diminish the toxicity
of the waste or reduce the likelihood of
migration of the waste's hazardous
constituents. EPA prefers to base BDAT
on technologies that further the
statutory goals of waste minimization
and recycling. EPA may select this type
of technology as BDAT over more
conventional treatment if the disparity
in performance of the technologies is not
too pronounced, and the technology
selected minimizes threats to human
health and the environment by
substantially diminishing waste toxicity
and reducing mobility of toxic
constituents.
Treatent data from "demonstrated"
"available" technologies are then
screened with regard to the design and
operation of the equipment, the quality
assurance/quality control (QA/QC)
analyses of the performance and
operating data, and the accuracy and
precision of the analytical tests used to
assess treatment performance. After this
screening, the treatment data are
adjusted for each constituent based on
the analytical recovery of that
constituent from the treatment residuals.
The Agency has chosen to perform this
adjustment in order to account (in part)
for analytical interferences associated
with the chemical makeup of the
treatment residual. Where data for more
than one treatment technology exist the
individual performance data for each of
the various treatment technologies are
then statistically evaluated. The mean
concentrations of the constituents in the
treatment residuals from each
technology are then compared using an
analysis of variance (ANOVA) test in
order to determine if one technology
performed significantly better than the
other. (A detailed discussion of the
methodology for identification of BDAT
and the ANOVA test is provided in the
November 7,1986 final rule (51FR
40572),) Where data exist for only one
technology, the Agency uses best
engineering judgment to assess whether
that technology represents tha best
applicable technology for that particular
waste and whether the data indicate
that the treatment system was well-
designed and well-operated.
After BDAT is identified, EPA
develops the treatment standard for
certain constituents in the waste.
Treatment standards are expressed as
maximum constituent-specific
concentrations allowed in the waste (or
in an extract of the treated waste), as a
specific technology (or group of
technologies), or as a combination of
these. Although the statute provides
discretion to establish treatment
standards as either levels or methods of
treatment, EPA normally attempts to set
concentration-based treatment
standards whenever possible, because
they provide the regulated community
with flexibility in choosing treatment
technologies and also allow the
investigation and development of new
and alternative technologies. In
addition, establishing concentration-
based standards provides a means of
ensuring that treatment technologies are
operated at conditions that will result in
the best demonstrated performance.
b. Use of Technologies Identified As
BDAT
Compliance with a concentration-
based treatment standard requires only
that the treatment level be achieved;
once achieved, the waste may be land
disposed. The waste need not be treated
by the BDAT technology; in fact, a
concentration-based treatment standard
provides maximum flexibility in one's
choice of treatment technology because
any treatment, including recycling or
any combination of treatment
technologies, unless prohibited (e.g.,
impermissible dilution) or unless defined
as land disposal (e.g., land treatment),
can be used to achieve these standards.
Some treatment standards in today's
rule, however, are expressed as a
treatment method rather than as a
concentration-based standard. EPA
typically establishes a treatment method
as the standard when it has no means of
calculating valid concentration-based
standards. In such cases, the specified
technology must be used to treat that
particular waste (including any mixture
that contains the waste). After the waste
is treated using the specified method, it
may be land disposed, unless EPA has
specified otherwise in the rule, or if the
residue exhibits a hazardous waste
characteristic and does not meet the
treatment standard for that
characteristic. In situations where
wastes subject to concentration-based
standards are mixed with wastes
subject to treatment standards
expressed as a method, the mixture
must be treated by the specified method
and must also meet the concentration-
based treatment standards for any other
prohibited waste contained in the
matrix (see generally 53 FR 31146-7,
August 17,1988).
When EPA requires the use of a
technology (or technologies), a generator
or treater may demonstrate that an
alternative treatment method can
achieve the equivalent level of
performance as that of the specified
treatment method (40 CFR 268,42(b)).
This demonstration is typically both
waste-specific and site-specific and may
be baaed on: (1) The development of a
concentration-based standard that
utilizes a surrogate or indicator
compound that guarantees effective
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Federal Register / Vol. 55, No. 106 / Friday, June 1, 1990 / Rules and Regulations 22537
treatment of the hazardous constituents;
(2) the development of a new analytical
method for quantifying the hazardous
constituents; and (3) other
demonstrations of equivalence for an
alternative method of treatment based
on a statistical comparison of
technologies, including a comparison of
specific design and operating
parameters,
c. Applicability of Treatment Standards
to Treatment Residues Identified as
Derived-From Wastes and to Waste
Mixtures
(1) Derived-From Wastes. All residues
from treating the original listed F, K, U
or P wastes are likewise usually
considered to be the listed waste by
virtue of the derived-from rule found in
40 CFR 281,3{c){2), Consequently, all
wastes generated in the course of
treatment are prohibited from land
disposal unless they comply with the
treatment standard or are otherwise
exempted from the prohibition, such as
through a no-migration determination or
by a capacity variance. Residues from
the treatment of characteristic wastes,
however, are not automatically
considered the characteristic waste;
these residues are considered
characteristic if they still display the
original characteristic, or if they display
another characteristic.
Treatment operations, including those
identified as BDAT, typically generate
wastewater and nonwastewater
residuals that may require further
treatment. EPA has not tested every
possible waste that may result from
every subsequent part of the treatment
train. However, since the treatment
standards promulgated today are
generally based on treatment of a
relatively concentrated form of the
waste (i.e., the "original" waste), the
Agency believes that residues from
subsequent treatment will be less
difficult to treat.
The Agency is investigating de
minimls levels for certain hazardous
constituents in listed wastes below
which the waste will no longer be a
hazardous waste for purposes of sobsitle
C regulation. The Agency has yet to
propose these de mirdmis levels. UK
Agency has indicated, however, tluat
these de minimis levels will cap
treatment standards if they are higtar
than the treatment standards (55 Fl
6640; Feb. 28,1990).
(2) Mixtures of Different /fozonfeasr
Waste Streams. Today's treatment
standards apply to mixtures of dlfiasai
waste streams. Where a waste misfflBe
consists of listed wastes and hasnsse
than one applicable concentration-
based treatment standard for a
particular constituent, the most stringent
standard must be met prior to land.
disposal (see 40 CFR 288.41(bJ). In the
event that such a waste mixture cannot
be treated to meet the moat stringent
standard, one may petition the Agency
for a variance from the treatment
standard pursuant to 40 CFR 268.44.
d. Wastewater Versus Nonwastewater
Standards
In today's rule, the treatment
standards (both concentration-based
and specified methods) are generally
presented as applicable to wastewaters
or to nonwastewaters (see 40 CFR
268.2). Wastewaters are defined as
those wastes (listed wastes, including
wastes generated as a result of the
mixture and derived-from rules) that
contain less than 1% total organic
carbon (TOC) and less than 1% total
suspended solids (TSS), except for those
wastes identified as FOOl, F002, F003,
F004, and F005 solvent-water mixtures.
(See 53 FR 31145 (August 17,1988) which
adopts this definition for most First
Third wastes, and 51 FR 40579
(November 7,1986) for the definition of
FOOl, F002, F003, F004, and F005 solvent-
water mixtures.) Those wastes (listed
wastes, including wastes that are
hazardous as a result of the mixture and
derived-from rules) that do not meet
these criteria are defined as
nonwastewaters and thus contain
greater than or equal to 1% TOC, or
greater than or equal to 1% TSS. (Note,
however, the discussion in ffl.B. of
further subcategorization of ,
nonwastewaters for purposes of
national capacity variances based on a
lack of solids incineration capacity.)
(1) Impermissible Switching of
Wastewater and Nonwastewater
Standards for Listed Wastes. (See also
discussion at III.D. below for issues
associated with characteristic wastes.)
It is not permissible to dilute or partially
treat a prohibited listed waste in order
to switch the applicability of a
nonwastewater standard to a
wastewater standard, or vice versa (see
52 FR 21012 (June 4,1987); but see 52 FR
25767 (July 8,1987) noting special
circumstances when California list
wastes are involved). The Agency has
established this principle because
technologies applicable to
nonwastewaters are not generally
applicable to wastewaters, or require
special designs (in the case of
incineration) in order to simultaneously
handle wastewaters. Furthermore,
treatment residues meeting the
definition of nonwastewaters must
comply with all applicable
nonwastewater treatment standards;
likewise, residual wastewaters must
comply with all applicable wastewater
treatment standards.
The Agency recognizes, however, that
certain technologies are specifically
designed to separate wastewaters from
nonwastewaters. Such technologies may
or may not be considered partial
treatment under this principle, as
discussed in the following paragraphs.
Dewatering technologies such as
filtration and centrifugation are typically
designed to remove suspended solids
(TSS) from aqueous wastes. When these
technologies are applied to a
nonwastewater that contains greater
than 1% TSS but less than 1% TOC, the
resultant liquid residue will probably
meet the definition of a wastewater (i.e.,
it will probably contain less than 1%
TSS and less than 1% TOC). The Agency
does not consider this impermissible
switching of applicable treatment
standards. (Note: For the purposes of
applying BOAT treatment standards, the
Agency does not consider carbon
adsorption a dewatering technology
even though it may act as a filter for
suspended material.)
When the suspended material is
organic and the overall untreated waste
contains peater than 1% TOC, these
dewatering technologies are also not
precluded from use. The resultant
residuals (i.e., the removed solids and
the liquids) must comply with the
applicable wastewate or nonwastewater
treament standards depending on their
TOC and TSS content If the liquid
residues from these dewatering
technologies meet the definition of
wastewaters, the Agency does not
consider this to be impermissible
switching of applicable standards.
The importance of the TOC level in
determining impermissible switching of
applicable wastewater or
nonwastewater treatment standard is
apparent in the scenario of treatment of
a waste containing less than 1% TSS and
slightly more than 1% TOC (such aa 2 or
3% TOC), and thereby being a
nonwastewater by definition. If EPA has
established concentration-based
treatment standards for the
corresponding wastewater form of this
waste, it would be permissible to use
carbon adsorption to treat this
nonwastewater, BO long as these
concentration-based treatment
standards for the wastewaters are .
ultimately achieved (i.e., if the residual
wastewater contains hazardous
constituents at levels above the
concentration-based wastewater
treatment standards, additional
treatment with other technologies is
necessary prior to land disposal.)
However, if EPA has established a
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22530 Federal Register / Vol. 55, No. 106 / Friday, June 1. 1990 / Rules and Regulations
wastewater treatment standard
expressed as Carbon Adsorption as a
Method of Treatment for this waste
code, the nonwastewater described
above must comply with the standard
for the nonwastewater form, despite the
fact that the TOG content is only slightly
greater than 1%. This is not just a
mechanical application of the
requirement that treatment must be
conducted by the specified method, with
the treatability group determined at the
point of generation, EPA established
Carbon Adsorption as a Method of
Treatment standard for certain
wasteweters based on the assumption
that wastewaters typically contain TOG
levels much less than 1%, so that
removal of the organic constituents from
these wastewaters was anticipated to
be effective. If the nonwastewater
previously described is subjected to
carbon adsorption as a method of
treatment, there would be no means of
assuring optimum removal of the
hazardous constituents. Thus, in such a
situation, the use of carbon adsorption
for this nonwastewater, is not permitted
as a means of complying with BDAT.
The Agency considers this an
impermissible switching of applicable
treatability groups and treatment
standards.
When EPA specifies a treatment
method as the treatment standard,
residues resulting from the required
treatment method are no longer
prohibited from land disposal unless
EPA should otherwise specify. In the
Second Third final rule (see generally 54
FR 26625, 26630, June 23,1989), the
Agency presented specific guidelines on
this. {This summary is repeated here for
the reader's convenience.) Where EPA
has established Incineration as the
treatment standard for nonwastewaters
and/or wastewaters, or where EPA has
established Carbon Adsorption the
treatment standard for wastewaters, the
following statements concerning
residuals from treatment trains
incorporating these technologies are
true: (1) Scrubber waters from
incinerators in compliance with the
substantive provisions of 40 CFR part
264 subpart O or part 265 subpart O are
considered to meet the treatment
standard and can be land disposed; (2)
the scrubber waters from incinerators in
compliance with the sustantive
provisions of 40 CFR part 284 subpart O
or part 265 subpart O are not required to
undergo Carbon Adsorption as a
Method of Treatment when this
specified wastewater treatment method
ilso has been established; (3)
incinerator ashes and residues from the
subsequent treatment of scrubber
waters from incinerators in compliance
with the substantive provisions of 40
CFR part 264 subpart O or part 265
subpart O are considered to meet the
treatment standard, and can be land
disposed; (4) Incinerator equipment
(such as fire brick) derived from
sections of the incinerator that have
been directly subjected to the high
temperatures of the incinerator that was
operated in compliance with the
substantive provisions of 40 CFR part
264 subpart O or part 265 subpart O, or
are downstream from the high
temperature zones, are considered to
meet the treatment standards for the
wastes that were incinerated and can be
land disposed (this does not include
incinerator equipment such as refractory
bricks that, as manufactured, contain
metals that may be characteristic
wastes by virtue of the EP toxicity test
when discarded); (5) wastewater
effluent and any subsequent
nonwastewater treatment residues from
carbon adsorption units treating
wastewater forms of these wastes (i.e.,
wastes from downstream from the
carbon column) are considered to meet
the specified treatment standard and
can be land disposed; and, (6) where
EPA specifies carbon adsorption as the
treatment method for wastewaters,
spent carbon, as well as any other
nonwastewater residues from the
wastewater treatment preceding carbon
adsorption, are not considered to meet
the treatment standard; such spent
carbon and nonwastewater residues
must be treated by the specified
nonwastewater method prior to land
disposal.
e. Transfer of Treatment Standards
Rather than testing the performance of
BDAT on evey waste, in certain cases,
the Agency transfers treatment
standards from a tested waste to a
similar untested waste. EPA believes
that transferring treatment performance
data for untested wastes is technically
valid, particularly when the untested
wastes are generated from similar
industries or similar processing steps.
EPA also believes that transferring
treatment performance data for tested
constituents tn one waste to untested
constituents in another similar waste is
technically valid, particularly when the
constituents and wastes have similar
chemical and physical properties.
To determine whether wastes
generated by different processes can be
treated to the same performance levels,
EPA reviews data on waste
characteristics to identify parameters
that are expected to affect treatment
selection. When this analysis suggests
that an untested waste can be treated
with the same technology as a tested
waste, the Agency examines a more
comprehensive list of constituents that
represent the most important waste
characteristics that will affect treatmen
performance.
The complete methodology for
transferring treatment standards.
however, depends upon the waste itself
and often differs from treatability group
to treatability group. For a detailed
discussion of the transfer methodology
for the wastes presented in today's rule,
refer to the background documents for
each waste or treatability group end the
background documents for the wastes
from which the treatment standards
were transferred.
EPA notes further that in the case of
transferring standards based on
performance of incineration, EPA is
most often transferring standards that
were based on the ability of the
incinerator to achieve destruction of
organics to detection limits as measured
in the ash and scrubber water. This is
supported by data from approximately
fourteen different test burns for a
variety of different RCRA hazardous
wastes. These wastes contained varying
concentrations of many BDAT list
organics. In developing concentration-
based treatment standards for the U and
P wastes, the Agency considered all of
the detection limits and determined
which were the most representative of U
and P wastes. In order to account for the
anticipated variability in waste
characteristics of untreated U and P
.wastes, the Agency typically selected
the highest detection limits for the
constituent that corresponded to the
chemical represented by the U or P
code. Thus, the Agency believes the
resultant treatment standards should be
achievable on a routine basis for the
majority of U and P wastes.'
When developing ccncentration-based
treatment standards for certain F and K
wastes containing organics, the Agency
considered all of the data and
determined which particular waste was
the most representative of that
particular F or K waste based on the
availability of waste characterization
data. As a result, the Agency often
transferred treatment standards that
were significantly lower than those
developed for the U and P wastes. The
Agency believes that these lower
treatment standards are achievable for
these F and K wastes based on the
ability to achieve detection limits for
organics in the waste matrix from which
the standard was transferred.
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Federal Register / Vol. 55, No. 108 / Friday. June 1. 1990 / Rules and Regulations
2253!:
f. Treatment Standards Based on Single
Facility Data, Grab Samples Versus
Composite Samples, and Waste
Analysis Plans
(1) Single Facility Data, As discussed
in the August 17,1988 final rule for First
Third wastes, the Agency believes that
the use of a small number of data sets
from a single treatment facility can be
representative of the treatment achieved
by the particular treatment system. This
is particularly true when no other
treatment data are available, or when
data exist but there is no verification
that the treatment process from which
the data were obtained was well-
designed or well-operated. It is not
possible for the Agency to sample every
facility generating the waste or every
treatment system treating the waste. For
the purposes of determining treatment
standards, the Agency has established a
methodology for selecting particular
facilities and treatment systems that it
considers to be well-designed and well-
operated. The Agency also selects
wastes that are representative of those
most difficult to treat.
The Agency recognizes that there is
variability inherent in every treatment
system, as well as variability in the
characteristics of the wastes. The
Agency accounts for these by
multiplying the mean of the constituent
concentrations by a variability factor.
This factor is derived through a
quantitative procedure that determines
the statistical 99th percentile for the
treatment standard. This establishes a
treatment standard that should be
achievable 99 percent of the time by a
well-designed, well-operated system.
The Agency further adjusts the
treatment standard to account for
variabilities due to analytical recovery.
In addition, all analyses of hazardous
constituents are performed in
accordance with an established QA/QC
plan as outlined in the BDAT Generic
Quality Assurance Project Plan.
Standards based on incineration are
always established above the limit of
detection for that particular waste
rather than at the detection limit. This is
because the Agency prefers to account
for the variability inherent in the
treatment system and in the analysis of
the recovery data. Therefore, following
EPA's methodology for establishing
treatment standards, the data are
adjusted through use of the variability
factor (typically 2.8) and an adjustment
for recovery of a spiked analyte (or
surrogate). The resulting treatment
standards for the organic constituents
are above the detection limits. The
standards are thus greater than the
achievable levels (which are at or below
the detection limits) and should be
easily met by a well-designed, well-
operated incineration system,
(2) Grab versus Composite Samples,
Where performance data exist based on
both the analysis of composite samples
and the analysis of grab samples, the
Agency establishes the treatment
standards based on the analysis of grab
samples. Grab samples normally reflect
maximum process variability, and thus
would reasonably characterize the range
of treatment system performance.
In cases where only composite data
exist, the Agency considers the QA/QC
of the data, the inherent efficiency of the
process design, and the level of
performance achieved. The Agency may
then choose to use this composite data
to develop the treatment standard.
Where these data are used to establish
the treatment standard, the treatment
standard is identified as based on
analysis of a composite sample.
Enforcement of that standard thus
would also be based on composite
samples.
(3) Waste Analysis Plans. The waste
analysis plan provides the basis for
monitoring a disposal facility's
compliance with the promulgated
treatment standards. This plan must be
adequate to assure compliance with part
268. The disposal facility is, however,
ultimately responsible if it disposes of a
waste that does not meet a treatment
standard. Therefore, a disposal facility
might violate the land disposal
restrictions while at the same time
comply with the provisions of its waste
analysis plan. Put another way, a waste
analysis plan may be written to
authorize types of sampling and
monitoring different from those used to
develop the treatment standard(s). In
such an instance, the disposal facility
must demonstrate that the waste
analysis plan (and the specific deviating
feature) is adequate to assure
compliance with part 268 (see 40 CFR
264.13). This might require, for example,
a demonstration of statistical
equivalence between a composite
sampling protocol and one based on
grab sampling, or a demonstration of
why monitoring for a subset of
pollutants would assure compliance of
those not monitored. In any case,
enforcement of the land disposal
restrictions is based on grab samples
(except as described in the previous
section) and analysis of all constituents
regulated by the applicable treatment
standands, not on the facility's waste
analysis plan. (See preamble section
III.G. for further discussion of WAPs.)
g. Analytical Requirements, the BDAT
List, and Relationship of PQLs to BDAT
(1) Waste Analysis Requirements, in
today's rule, BDAT has been identified
as a destruction technology for organic
constituents and cyanides in many
wastes. The best measure of treatment
performance for these wastes is one that
reflects the extent to which these
organics and cyanides have been
destroyed. This approach is consistent
with the Congressional preference to
destroy hazardous wastes where
possible. See, e.g., 130 Cong. Rec. S
9178-S179 (July 25,1984) (statement of
Sen, Chaffee) (wastes with high organic
content should be incinerated). This
approach is also consistent with the
strong Congressional goal of eliminating
uncertainty from the land disposal of
hazardous waste. See, e.g., RCRA
section 3004(d)(l), because it ensures
removal of hazardous constituents from
the land disposal environment. The
corresponding treatment standards for
these constituents are based, therefore,
on an analysis of total constituent
concentrations in a representative
sample of the treated waste.
(Note: The land disposal restrictions
for solvent waste codes FOOI-FOQ5 (51
FR 40572) require analysis of waste
extracts obtained from the Toxicity
Characteristic Leaching Procedure
(TCLP) as a measure of performance. At
the time that the treatment standards for
F001-F0Q5 were promulgated, useful
data were not available on total
constituent concentrations in treated
residuals and, as a result, the TCLP was
considered to be the best available
measure to evaluate performance of the
treatment technology.)
In cases where treatment standards
formetais in nonwastewaters are based
on stabilization, the use of the TCLP is
typically required as the measure of the
performance of the treatment
technology. Where treatment standards
for nonwastewaters are based on
multiple treatment processes due to
mixtures of organics and metals, or
where recovery of metals is the basis of
the treatment standards, analysis of
total constituent concentrations and
analysis of the TCLP extract (or EP
extract depending upon the standard)
must be performed prior to land
disposal,
(2) The BOAT List. The Agency has
established a list of chemicals made up
primarily from the constituents in 40
CFR part 261 appendix VII and
appendix VIII, that are evaluated for
regulation as BDAT constituents (i.e., for
purposes of concentration-based
treatment standards) when they are
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22540 Federal Register / Vol. 55, No. 106 / Friday, June 1. 1880 / Rules and Regulations
present in a listed waste. The rationale
for selection of the particular
constituents to be regulated can be
found in the background document for
each waste or waste treatability group.
The Agency believes that it is not
limited to regulating only those
constituents for which a waste is listed
[40 CFR part 261 appendix VII).
Appendix VII sets forth only the
constituents that were the basis for the
listing and is not an exhaustive list of
hazardous constituents in each waste.
Additional support fcr taking this
approach is found in RCRA section
3CQl(f), which specifies that EPA must
consider additional hazardous
constituents other than those for which
the waste was listed when evaluating
delisting petitions. Section 30M(f) thus
acknowledges that appendix VI! is only
a partial list of the hazardous
constituents that can be present in a
listed waste.
(3) Relationship cf Treatment
Standards to PQLs, In proposed
revisions to the September 1986 edition
of Test Methods for Evaluating Solid
Wastes (also known as and herein
referred to as SW-848). the Agency
defines practical quantisation limits
(PQLs) as '*• * * Ae lowest level of
quantitation that the Agency believes a
competent laboratory can be expected
to reliably achieve." PQLs are directly
related to the amount of interferences
that are present in different waste
matrices, and the PQLs listed in SW-848
are not always achievable for
constituents as measured in untreated
wastes. Most treatment processes,
however, particularly destructive
tachnologies such as incineration,
destroy not only the hazardous
constituents of the waste but also other
organics that typically interfere with the
analysis for constituents in untreated
wastes. Thus, PQLs typically are
significantly lower for treatment
residuals such as incinerator ash than
for untreated wastes. Such differences
in FQLs for untreated versus treated
wastes are demonstrated by the data for
almost every incineration test burn
performed by the Agency in developing
the treatment standards.
Potential users of PQLs should keep in
mind that the PQLs in SW-646 were
established to provide guidance for the
analysis of waste samples by acting as
minimum performance criteria for
analytical laboratories. The PQLs do not
necessarily represent the lowest limits
of analytical performance achievable for
any given waste.
The PQLs in SW-B48 were intended to
be broadly applied to groups of wastes.
As a result, matrix dependent correction
factors were not developed for any
particular waste code, and do not
specifically apply to any particular
treatment residuals (i.e., only correction
factors for matrices identified as ground
water, low-level soil, high-level soil, and
non-water miscible waste were
specified in Method 8250 of SW-84iJ.
Furthermore, the Agency is currently
modifying and expanding the matrix
correction factors, as well as modifying
the detection limits from which the PQLs
are derived.
The PQLs listed in SW-846 for some
constituents are less stringent than some
of the treatment standards. This
apparent anomaly results primarily from
the fact that the PQLs in SW-B48 were
not based on the same waste matrices
(i.e., treatment residues) that were
tested in developing the treatment
standards. The treatment standards for
a given waste code are based on
analysis of the treatment residuals of
the waste (or in some cases, a similar
waste from which the treatment
standards are transferred).
Consequently, the resulting treatment
standards appropriately reflect the level
of analytical performance achievable far
that waste. Thus, the PQLs in SW-648
are generally not used directly in
developing the Part 268 treatment
standards.
Today's promulgated concentration-
based nonwastewater standards based
on combustion derive from detection
limits from EPA's 14 test burns (which
generated the data supporting virtually
all of the proposed rale's concentration-
based standards) plus a data set
submitted by a commenter representing
the hazardous waste treatment industry.
This comment is discussed at length in
subsequent paragraphs.
This commenter submitted a study
that was undertaken to verify whether
industry labs can reliably quantify
regulated constituents at the level of
both the existing and the proposed
concentration-based standards. The
study's secondary purpose was to
identify any regulated constituents for
which the concentration-based
treatment standards may be
inappropriate. The study consisted of
analyzing regulated constitutents in
incinerator ash at levels near the
concentration-based standards.
In the commenter's opinion, the data
and observations indicate that many
treatment standards are inappropriate,
and also made three major assertions
with respect to PQLs. First, the
commenter asserted that based on the
FQLs calculated using his data, certain
previously promulgated concentration-
based standards are not achievable.
EPA rejects this assertion because no
specific treatment data were received in
either this study or during the comment
period for the appropriate ruiemaking
that indicated on a waste-specific busis
that these treatment standards could not
be achieved. (Note; The Agsncy is sot
precluded, however, from promulgating
revisions to these standards in a later
rulemaking after giving sufficient public
notice.)
Second, the commenter asserted that
certain of the proposed Third Third
concentration-based standards are not
achievable because they are based on
detection levels below the PQLa
calculated from his study. EPA
evaluated the commenter's detection
limit data rather than his PQLs and has
determined that the majority of the
commenter's detection limits
demonstrate compliance with the
concentration-based standards that
were proposed, and all but a very few,
comply with the standards being
promulgated in today's rule. Because of
this, and for reasons discussed below,
the Agency has generally rejected the
use of the PQLs calculated by the
commenter in promulgating treatment
standards.
However, several nonwastewater
standards promulgated in today's rale
reflect revisions baaed on the
commenter'a detection limit and
recovery data. EPA has indicated where
these data were used to revise specific
standards in later sections of today's
preamble. Although EPA revised these
standards based on some data from this
study, EPA generally found Saws with
the commenter's study (such as:
Incomplete untreated waste
characterization; probable analytical
interferences; and incomplete
incinerator process documentation) that
precluded incorporation of much of the
data into the treatment standards for
nonwastewaters. For example, BOAT
analytes were detected at levels above
the detection level (i.e., at measurable
quantities) in several of the commenter's
ash samples. Also, different ash samples
appeared to have different compositions
of these BOAT analytes. apparently
indicating that these ashes differ
significantly from one another. (See
detail responses of these data in the
Response to BDAT-Related Comments
Background Document for Third Land
Disposal Restrictions in the
administrative record for today's rule.)
Third, the commenter stated that EPA
had inappropriately calculated
nonwastewater treatment standards in
terms of both numerical detection levels
and the best procedure for calculating
standards, specifically, considering the
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QSWER DIE. NO. 9541.00-14
..->•• ' •• \ • :•.,.• • , r," .:!•: •-• h. V -. :': ! M M V.! t •'{ >>;;;
Federal Register / Vol. 55, No, 108 / Friday, June 1, 1990 / Rules and Regulations 22541
use of PQLs. The commenter chose to
use a methodology adapted from the
Clean Water Act regulations to
calculate alternative concentration-
based standards for ash which they
asked EPA to consider. Regardless of
the validity of the commenter's data,
EPA is not deviating from the
calculation methodology of the Generic
Quality Assurance Project Plan for Land
Disposal Restrictions Program ("BDAT")
promulgated in conjunction with the
November 11,1986 regulatory .
framework. The Agency therefore is
retaining its established methodology.
h. Relationship of Detection Limits to
Concentration-Based Standards
Several commenters raised the issue
that, hi certain cases, analytical
problems (i.e., difficulties in reliable
quantitation at detection limits near the
concentration-based treatment
standards) may prevent demonstrating
compliance with the proposed treatment
standards for Third Third wastes. They
also pointed out that this same problem
already may exist for some Fkst and
Second Third wastes.
EPA has examined the data submitted
to the Agency in support of these
comments. (See discussion of these data
as they relate to PQLs in the preceding
section of the preamble.) While the
Agency does not believe that the
currently available data is conclusive,
EPA acknowledges that there can be
situations where lack of available
analytical methods may prevent
demonstration of compliance with the
treatment standards.
EPA is dealing with this potential
problem in a number of ways. First, EPA
has examined detection limit data
submitted by the commenters and
compared them to the data used to
develop the proposed standards. After a
thorough technical evaluation, the
Agency incorporated a portion of these
data into the promulgated standards in
today's rule. In addition, the Agency has
reevaluated the existing BDAT data
generated by the Agency, the transfer
procedures used for some of the wastes,
and recently available information and
data on recovery of the BDAT organic
constituents. Thus, EPA concurred with
the commenters and concluded that
many of the other proposed
concentration-based treatment
standards may not be achievable. As a
result, EPA is promulgating revised
treatment standards for some organics
in nonwastewaters that are higher than
the proposed standards. In doing so, the
majority of the commenters' concerns
over ability to measure at
concentrations near the standards are
no longer applicable. {Note: The Agency
is continuing to study this issue and, if
warranted, may adjust other standards,
including some for First and Second
Third wastes, after sufficient public
notice.)
Second, in certain situations where
compliance with a standard cannot be
demonstrated for a particular waste due
to problems with analytical detection
limits and where the treatment
technology employed was considered by
the Agency to be BDAT (see specific
instances below), the Agency has
decided that reliance upon the
treatabiliry variance petition process
would place an unnecessary burden on
both the regulated and regulatory
communities. The Agency believes that
where a waste has been treated with a
combustion BDAT process (i.e.,
incineration or fuel substitution unit),
and if the person has made a good faith
effort to achieve maximum analytical
sensitivity, the Agency will consider the
person to have demonstrated
compliance with the treatment standard
for the respective organic constituents in
the waste.
In order to demonstrate compliance in
such cases, the person will have had to
make a good faith effort to demonstrate
that the analyte of concern is not
present in the waste at. or above, the
treatment standard. To provide a more
concrete basis for making such
demonstrations, EPA intends to develop
and issue guidance on what constitutes
a good faith effort to achieve such
analytical sensitivity within the near
future. This guidance is anticipated to be
available at or near the effective date
for the Third Third treatment standards
(August 8,1990).
In developing the treatment standards
in today's rule, the Agency selected the
treatment data (i.e., detection limit data)
that best represented what the majority
of wastes could meet. (Note: Most of
these data were from incinerator units
that were considered well-designed and
well-operated.) However, the Agency
rejected detection limit data for some
wastes, because the Agency determined
that these wastes were not necessarily
representative of the treatability of other
wastes. After reexamination of all of the
available detection limit data, the
Agency has found that the majority of
the detection limit data for these wastes
will generally not exceed the
promulgated treatment standards by
more than one order of magnitude. The
Agency also points out that there is an
inherent three-fold difference in
detection limits that may arise due to
difference in sample size taken for
analysis.
Thus, until this formal guidance is
available, the Agency will consider that,
if an analytical sensitivity (i.e., detection
limit) within an order of magnitude of
the organic constituent treatment
standard has been achieved, compliance
with such treatment standard will be
considered to have been demonstrated
provided the data represents the use of
a combustion process (i.e., restricted to
incineration or fuel substitution in a unit
In compliance with all applicable
technical operating requirements under
40 CFR part 264 subpart O and part 265
subpart 0, Thus, it is likely that the
combustion unit is being operated
properly). The Agency believes that this
is consistent with RCRA section
3004(m), in that, as an alternative to
specifying a concentration-based
standard for these wastes, the Agency
could have promulgated a method of
treatment specifying the use of
incineration or fuel substitution.
One commenter requested that
persons with untreated wastes also be
allowed to certify compliance if
analytical problems prevent their
demonstrating compliance with the
treatment standards. The Agency
emphatically disagrees. This situation
has a substantial potential to mask the
presence of hazardous constituents.
Untreated wastes, and wastes treated
by other than the aforementioned
combustion processes (e.g.,
biotreatment), typically contain many
materials that interfere with achieving
low detection limits. Such wastes can,
thus, contain significant levels of
hazardous constituents even when the
treatment process is operating properly.
Allowing land disposal of such wastes
would be contrary to the objectives of
the land disposal restrictions statutory
provisions. In addition, the rules already
allow generators to certify compliance
based on their knowledge of the waste,
rather than by testing (section
288.7(a){2)). If a generator believes, for
example, that as a result of mass
balance information a waste meets the
treatment standard, it can certify
compliance even if it Is not possible to
analytically demonstrate compliance
with the standard.
EPA is thus amending 11 268.7 and
268.43 to state that where-a treatment
standard for organics in
nonwastewaters is based on the
aforementioned combustion
technologies (i,e,, incineration or fuel
substitution in units operated in
accordance with the technical operating
requirements of 40 CFR part 284 subpart
O and part 265 subpart O) and a waste
has been treated using that treatment
method, the treatment facility may
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Federal Register / Vol. 55, No. 106 / Friday. June 1, 1990 / Rules and Regulations
certify compliance with the organic
constituent standard if a good faith
effort has been made to analytically
demonstrate compliance with this
standard and a detection limit within an
order of magnitude of the organic
constituent standard has been achieved.
This includes all waste codes in the
First, Second, and Third Thirds where
standards for organics are based on
such combustion processes or were
transferred from wastes based on such
combustion processes. These standard!
are specifically indicated in Table CCW
of § 268.43.
The Agency points out that in cases
where a facility believes that waste-
specific treatment standards cannot be
met because their laboratory is still
unable to achieve detection limits below
the treatment standards on specific
treatment residuals, and: (1) The facility
complies with all the other conditions
mentioned above; or (2) a facility
utilizes a combustion technology other
than incineration or fuel substitution: or
(3) a facility utilizes a technology other
than combustion that can be
demonstrated to be equivalent, the
facility may submit a petition for a
variance from the treatment standards
for that particular waste code (EPA
construes 40 CFR 268.44 as
encompassing such petitions). The
facility must demonstrate that the
analyses are in compliance with all
other BDAT QA/QC provisions (as
outlined in the BDAT Generic Quality
Assurance Project Plan (EPA/530-SW-
87-011, March 1987]. Moreover, the
petitioner must also demonstrate that
the treatment process is a well-designed
and well-operated BDAT process.
i. Relation of Hazardous Waste
Treatment Council v. EPA
A number of commenters raised the
issue of whether the treatment
standards being adopted are below
levels at which threats to human health
and the environment are minimized,
citing portions of the recent opinion
Hazardous Waste Treatment Council v,
EPA, 886 F. 2d 355 (D.C.Cir. 1989)
(HWTC ni). In that case, the Court
upheld EPA's existing technology-based
approach to establishing treatment
standards as a reasonable construction
of the statute, but remanded the case to
the Agency in order for the Agency to
properly explain why it had chosen this
approach. EPA's explanation was
published in the Federal Register on
February 28.1990 and was accepted by
the Court, which dismissed all petitions
for review on March 15,1990.
. The standards EPA is adopting in this
rule are also technology based.
However, as diacusse*1 ln detail in
section ULD. below, the Agency believes
that with respect to disposal of
prohibited characteristic wastes that are
no longer "hazardous" under the
regulations, the Agency must harmonize
the competing considerations of section
3C04(g) and ICOfi (b) (relating to a
regulatory framework for subtitle D
systems) with those of section 3004(m]
(relating to treatment to fully minimize
threats) before determining the extent of
the prohibition.
EPA notes further that it believes that
treatment standards established below
characteristic levels can result in
nonredundant minimization of threats to
human health and the environment and
thus be permissible under RCRA section
3004(m) and the Court's opinion. Indeed,
the Court itself noted that characteristic
levels do not serve as a bar to further
treatment (886 F. 2d at 363). The
treatment standards for characteristic
wastes in today's rule thus are not
premised on any finding that the
characteristic level, in and of itself,
creates a bar to further treatment.
2. Treatment Standards for Certain
Characteristic Wastes
This section of today's preamble
presents a discussion of D001 Ignitable,
D002 Corrosive, and D003 Reactive
characteristic wastes, as well as the six
EP Toxic pesticides (D012 through D017).
Treatment standards for the eight EP
Toxic metals are found in section HI.A-3.
of this preamble.
a. General Issues on Developing
Treatment Standards for Characteristic
Wastes
There were a number of options
proposed for developing treatment
standards for the characteristic wastes.
One option considered by the Agency
was to promulgate concentration-based
standards (for those characteristic
wastes that were defined by a level)
based on available data. A second
option was to promulgate a treatment
standard expressed as a required
method, A third option was to simply
establish the characteristic level as the
treatment standard, and a fourth option
was to establish a method of treatment
along with a required performance level.
The Agency received extensive
comments discussing these options,
particularly the option of setting
treatment standards expressed as the
characteristic levels. A few commenters
strongly supported establishing
treatment standards for characteristic
wastes at levels below the characteristic
levels, stating that available
performance data supported such an
approach. The majority of commenters.
however, supported limiting tile
treatment standards at the characteristic
levels.
The Agency found some of the
technical issues raised by these
commenters persuasive. (Discussion of
the policy issues associated with setting
treatment standards for characteristic
wastes is found in preamble section
HID.) The Agency agrees with
commenters that argued that
characteristic wastes may be generated
in many matrices, and thus, can take
any number of different forms;
transferring data from specific listed
wastes to these variable characteristic
wastes, the commenters indicated, may
not account for such differences.
In addition, for certain DOOl. D002.
and D003 treatability groups, there are
currently no available analytical
methods to quantify residual ignitability,
corrosiveness, and reactivity. Until EPA
can develop analytical methods capable
of accurately determining quantitative
characteristic hazards, industry must
Judiciously make qualitative technical
decisions dependent on the waste
definition. Treaters must complete
treatment until qualitative technical
judgement indicates that the waste or
waste residual no longer exhibits the
characteristic hazard specified by the
definition.
Many commenters supported the
Agency's approach for setting treatment
standards for Igni table. Corrosive, and
Reactive (with the exception of Reactive
Cyanides) wastes expressed as a
required method of treatment:
Deactivation. The Agency, therefore, is
promulgating the Deactivation treatment
standard and is providing suggested
deactivation methods to remove the
characteristic for the various Ignitabte,
Corrosive, and Reactive treatabiSity
groups in appendix VI to 40 CFR part
268.
No comments were received on the
proposed approach for regulating the EP
Toxic pesticides P011-D017). The
Agency is promulgating concentration-
based treatment standards for the
nonwaatewater forma of these wastes
and methods of treatment for the
wastewaters. The Agency is taking this
action based on data indicating that
incineration can remove organic
constituents to non-detectable levels in
nortwastewaters as evidenced by
incineration data available for certain
halogenated pesticides. Further
discussion of issues associated with
promulgating treatment standards for
these characteristic wastes is found in
the following sections of today's
preamble.
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b. Ignitable Characteristic Wastes
Under 40 CFR 281.21, there are four
criteria for identifying a waste as D001
Ignitable. Paraphrasing these criteria, a
waste is a DOOl Ignitable if: (1) It is a
liquid with a flash point less than 140 *F;
(2) it is an ignitable compressed gas; (3)
it is not a liquid and is capable of
causing fire through friction, absorption
of moisture, or spontaneous chemical
changes and when ignited bums
vigorously and persistently; or (4) it is
an oxidizer. EPA has determined that
these four criteria translate directly into
four major D001 subcategories (although
EPA has further subcategorized the
ignitable liquid subcategory into three
treatability groups). If a waste is
classified as D001 because it fits under
more than one D001 subcategory, the
waste must be treated by a treatment
method or treatment methods that will
remove all characteristics of ignitability
for each applicable subcategory.
(1) Ignitable Liquids Subcategory, The
first D001 subcategory, the Ignitable
Liquids Subcategory, refers to those
D001 wastes that exhibit the properties
listed in § 281.21(a)(l). Commenters
specifically questioned whether the
determination of liquid under
§ 281.21{a)(l) was based on the paint
filter test ("free liquid" Method 9095),
the EP test (Method 1310), or the
releasable liquids test in Method 9096,
While the Agency has defined liquids
both as materials expressed from
wastes in Step 2 of Method 1310 (EP),
and in Methods- 9095 and 9096, there is
not a specific definition of liquid with
respect to this characteristic in the
regulations. Therefore, the generator of a
potentially ignitable waste may use any
method for determining whether the
waste is classified as a liquid for which
he can provide an appropriate scientific
or technical justification.
One cornmenter requested
clarification regarding the D001 liquid
exclusion for aqueous alcohol wastes
which is found in 40 CFR 261.21(a), This
provision states that a solid waste
exhibits the characteristic of ignitability
if "it is a liquid, other than an aqueous
solution containing less than 24 percent
alcohol by volume, and has a flash point
less than 60 'C (140 T) * * *" The
Agency notes that, in this definition, the
term alcohol refers to any alcohol or
combination of alcohols. (Note: If the
alcohol has been used for solvent
properties and is one of the alcohols
specified in EPA Hazardous Waste No.
F003 or F005, the waste must be coded
with these Hazardous Waste Numbers
(which cover the hazard of ignitability).)
Data indicate that the majority of all
D001 wastes generated fall into the D001
Ignitable Liquids Subcategory and are
typically described as solvents, paint
thinners, contaminated oils, and various
organic hydrocarbons. Some of these
wastes may contain organic constituents
that are potential carcinogens or
otherwise toxic. Typically, the major
organic constituents in these wastes are
volatile, flammable hydrocarbons or
oxygenated hydrocarbons that provide
the characteristic of ignitability to the
waste (i.e., a flash point of less than 140
*F). (Note: Currently, the length of time
over which combustion is sustained at a
temperature of less than 140 *F is not
specified although such a regulatory
change may be appropriate in the future.
This issue assumes relevance when
considering the large volume of solvent-
containing wastewafers that flashes but
does not sustain combustion.)
For purposes of BOAT determination,
most of the ignitable liquid wastes are
typically classified as nonwastewaters
because of their high organic content
(usually greater than 1 percent TOG).
Technologies applicable for treatment of
these organic nonwastewaters include
incineration, fuel substitution, and
recovery processes such as distillation
or liquid-liquid extraction. Thermal
destruction, technologies such as
incineration and reuse as a fuel
completely remove the characteristic of
low flash point by completely destroying
the volatile organic compounds (VOCs),
thereby rendering the waste
nonignitable. Recovery processes also
remove the characteristic but recover
the ignitable material for reuse instead
of destroying the material. Furthermore,
the Agency believes such technologies
are both demonstrated and available
because EPA has data showing that the
majority (i.e., 75%) of D001 Ignitable
Liquids are already treated by
incineration, reused as a fuel substitute
because of their high BTU content, or
recovered for reuse through processes
such as distillation. Based on the fact
that these demonstrated, available
technologies remove the characteristic
of ignitability permanently and
completely, as well as destroying a
number of hazardous constituents, EPA
proposed a treatment standard of
"Incineration, Fuel Substitution, or
Recovery as Methods of Treatment" for
D001 nonwastewaters In the Ignitable
Liquids Subcategory (54 FR 48420).
At the time of proposal, the Agency
was unable to determine whether any
DOOl wastes in the Ignitable Liquids
Subcategory, as initially generated,
conformed to EPA's regulatory
definition of wastewaters (i.e., wastes
containing less than 1 percent TOC and
1 percent TSS). Accordingly, EPA did
not believe that wastewater treatment
technologies such as biodegradation
were applicable for treatment of any
waste forms in the DOOl Ignitable
Liquids Subcategory because of the high
organic contents and large BTU values
thought to be inherent in these wastes,
as well as the concern for air emissions
caused by the release of untreated
VOCs during dilution and aeration steps
associated with most wastewater
treatment technologies. Consequently,
EPA proposed that the standard for
nonwastewaters apply to any
wastewaters as well, since the end
result would be the removal of the
ignitability characteristic and
destruction of the hazardous
constituents. See 54 FR 48420-22.
Concerning the issue of wastewater
generation, the Agency received many
comments indicating that there are
wastes in the DOOl Ignitable Liquids
Subcategory that consist primarily of
water. The commenters also emphasized
that most of these low-organic, aqueous
DOOl wastes are best treated using
wastewater treatment technologies even
though such aqueous streams may
contain greater than 1 percent TOC and
may thus be classified as
nonwastewaters. With respect to
wastewater treatment technologies
being appropriate methods of treating
aqueous ignitable wastes, some
commenters said that biological
treatment is applicable for some of the
DOOl aqueous wastes that contain
water-soluble organics. Other
commenters indicated that wet air
oxidation and carbon adsorption are
also applicable forms of treatment for
DOOl aqueous wastes. Nonetheless, the
Agency is still concerned about possible
air emissions associated with the
aeration and dilution steps that are
often part of wastewater treatment
processes such as biodegradation.
However, EPA believes that such
emissions can be controlled by altering
operating parameters (e.g., aeration
rates, temperatures) and by performing
process steps such as aeration and
dilution steps in controlled
environments such as tanks equipped
with air pollution control devices. The
Agency believes some facilities are
already practicing these precautions. For
example, one commenter mentioned a
biodegradation system used to treat
DOOl that was anaerobic and kept any
air emissions contained inside the
system.
After evaluation of all the appropriate
waste characterization data and
treatment performance data presented
in the comments, the Agency decided
that wastewater treatment technologies
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22544
Federal Register / Vol. 55, No. 106 / Friday, June 1. Ii90 / Rules and Regulations
that are capable of providing legitimate
treatment for such aqueous wantes do
exist. Next, EPA investigated
information about technology treatment
capabilities corresponding to the organic
and water contents of wastes. For
example, the Agency has information
indicating that incineration is generally
applied to those wastes having greater
than 10 percent organic content and that
technologies such as air stripping, wet
air oxidation, and solvent extraction can
be applied to streams containing up to
10 percent organic content. Using this
information, along with the Agency's
regulatory definitions of wastewaters
and nonwastewaters, EPA determined
that the D001 Ignitable Liquids
Subcategory should be further
subcategorized by division into three
treatability groups as follows: (1) DOQ1
Ignitable Liquids High TOC
Nonwastewaters, (2) D001 Ignitable
Liquids Low TOC Nonwastewaters, and
(3) D001 Ignitable Liquids Wastewaters.
The Ignitable Liquids High TOC
Nonwastewater Subcategory is defined
as ignitable liquid wastes that contain
greater than or equal to 10 percent TOC
as generated. These wastes have large
organic concentrations, high BTU
content, and low water content. It is
common practice to recover reusable
organic materials from these wastes
using processes such as distillation,
steam stripping, and liquid-liquid
extraction. Also, many of these wastes
are excellent candidates for fuel
substitution because of high BTU values.
(Additional discussion on fuel
substitution as a treatment method for
these wastes is contained in the
discussion of national capacity
variances in section III.B.) The Agency
is promulgating "Incineration (INCINJ,
Fuel Substitution (FSUBS), or Recovery
(RORGS) a Method of Treatment" for
this treatability group. See § 268.42
Table 1 in today's rule for a detailed
description of the technology standard
referred to by the five letter technology
code in parentheses.
The Agency believes it appropriate to
require that these wastes be treated by
some type of destruction and recovery
technology given that they often contain
high concentrations of toxic organic
constituents that provide the ignitability
characteristic to the waste. The toxics in
these wastes might not be destroyed if
the waste could be land disposed so
long as it is not ignitable at the point of
disposal. Additionally, the Agency notes
that this is an instance illustrating how a
point-of-generation approach (i.e., the
treatment method applies if the waste is
in the treatability group when
generated) ensures that the objectives of
section 3004(m) are satisfied, EPA also
notes that if an Ignitable Liquids High
TOC Nonwaetewater is commingled
with other waste streams, the entire
mixture must be treated by one of the
methods prescribed for Ignitable Liquids
High TOC Nonwastewater Subcategory
268.41(b). This is an instance of how the
rules seek to ensure that wastes are not
commingled if the treatment method is
not appropriate for each commingled
waste. Put another way, commingling of
Ignitable Liquids High TOC
Nonwastewaters with non-incinerable
wastes is normally a type of
impermissible dilution. See 52 FR 25766
(July B, 1987J.
The Ignitable Liquids Low TOC
Nonwastewater Subcategory is defined
as wastes that contain greater than 1%
but less than 10% TOC as generated.
The Ignitable Liquids Wastewater
Subcategory is defined as wastes that
contain less than 1 percent TOC and
less than 1 percent TSS as generated.
The Agency believes that some of these
wastes can be effectively treated (i.e.,
remove the characteristic of ignitability
by either destroying or recovering the
organic constituents that gave the waste
its ignitable character} using
technologies applicable for treatment of
aqueous wastes. In some cases, these
wastewaters and low TOC
nonwastewaters may need to be mixed
with other wastewaters to achieve an
organic concentration desirable for
proper operation of a treatment system
for aqueous wastes. For instance,
wastewaters destined for biological
treatment are often commingled to
achieve an organic concentration that is
optimal for the microorganisms. Fuel
substitution is not considered practical
since wastes in both these categories
generally do not have high BTU contents
because they contain mostly water.
Most of these wastes can be treated
with wastewater technologies; however.
Incineration may also be applicable,
especially for the Low TOC
Nonwastewaters. EPA is promulgating
"Deactivate (DEACT) to Remove the
Characteristic of Ignitability" for both
the Ignitable Liquids Low TOC
Nonwastewater Subcategory and the
Ignitable Liquids Wastewater
Subcategory. See section 268 appendix
VI of today's rule for a list of applicable
technologies that used alone or in
combination can achieve this standard.
(See also § 268.42 Table 1 for a technical
description of these technologies. A five
letter code (acronym) for each
technology has been established in
order to simplify the tables.)
One commenter requested
clarification on whether phase
separation followed by recovery or use
as a fuel of the organic phase could be
considered a permissible type of
deactivation treatment for ignitible
wastes. EPA considers processes that
separate an organic phase to be
recovery (or in some cases
pretreatmentj and, hence, acceptable
treatment provided the separated
organic phase is reused or further
treated by a technology that will remove
the characteristic of ignitability. The
aqueous phase would not require further
treatment unless it still exhibited the
ignitability characteristic (assuming the
aqueous phase is not hazardous for any
other reason). See also discussion of
permissible switching of applicable
wastewater and nonwastewater
standards 54 FR 48383 (November 22,
1989). (Additionally, this is in keeping
with the general principle established in
these rules that determination of
whether a characteristic waste achieves
BDAT must be reevaluated whenever a
treatment residual is generated. Put
another way, each new treatability
group is a new point of generation for a
characteristic waste. See section in.D.
below.)
EPA is aware that some D001
Ignitable Liquids have been shown to
contain organic constituents that are
also constituents in F001-F005 solvents.
The Agency studied the option of
transferring the standards for these
constituents from the corresponding
F001-F005 standards promulgated in the
November 7,1986, final rule (51 FR
40842), The Agency received comments
for and against this option. However,
the Agency believes that this option
would create an unnecessary burden on
the regulated community since the
majority of D001 wastes in the Ignitable
Liquids Subcategory should not contain
these constituents and that most wastes
containing F001-F005 constituents are
probably cases of misclassification.
Misclassifying F001-F005 waste as D001
is currently one of the largest
enforcement issues in the RCRA
.program. Such misclassification is, of
course, illegal and a serious infraction. It
avoids the Congressionally mandated
treatment standards for the prohibited
solvent wastes. Indeed, solvents were
the wastes Congress prioritized for
prohibition and treatment. EPA believes,
however, that the problem is best
handled through enforcement rather
than establishing treatment standards
for the misclassified wastes because it
seems an unreasonable burden to
require generators of authentic D001
wastes to conduct the significant
amount of testing and certification
required under the land disposal
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22545
restrictions when it is likely that the
constituents will not be present in most
true DOQ1 wastes. Therefore, the Agency
is not promulgating concentration-based
DOOl treatment standards based on a
transfer of F001-FD05 data at this time,
although it may reevaluate this decision
in the future.
(2) Ignitable Compressed Gases
Subcategory, The second subestegory,
the Ignitable Compressed Gases
Subcategory, refers to those D001
wastes that exhibit the properties listed
in § 261.21(a)(3). The Agency has limited
information on the generation and
characterization of D001 wastes in this
Subcategory, but suspects that although
these wastes are generated, it is unlikely
that they require placement in any type
of land disposal unit. The Agency
believes that there are no gas cylinders
containing compressed ignitable gases
placed in surface impoundments and
that it is physically impossible to
dispose of them by means of deep well
injection. Some cylinders containing
D001 ignitable gases may be placed in
waste piles; however, such placement of
a container in a storage unit is not land
disposal under section 3004{k). See 54
FR 48439. In addition, these types of
cylinders are usually returned to
distribution facilities to be refilled. The
Agency does not intend to prevent
short-term storage of cylinders prior to
refilling.
The Agency proposed several options
as treatment standards for compressed
ignitable gases. The first option was that
of recovery by direct reuse since,
typically, the cylinders are directly
refilled. The second option was
incineration by venting the gas into an
incinerator. The Agency proposed a
treatment standard of "Recovery or
Incineration of Vented Ignitable Gases"
for these wastes.
EPA continues to believe that both
incineration and recovery are applicable
technologies for treatment of most
compressed gases. However, several
commenters presented information
about the limitations of the proposed
technologies and provided information
about additional technologies that the
Agency also believes to be applicable
treatment methods for removing the
characteristic of ignitability for this
Subcategory,
In regard to the feasibility of the
recovery option, one commenter stated
that it is viable within the compressed
gas industry, except for cases such as
cylinders that have defective valves,
that have lost the identity of the
manufacturer, that ara lecture bottle
size, ur that are damaged. In any of
these four cases, the contents in the
cylinders must instead be treated. The
commenter also stated that the most
prevalent treatment method is to feed
the ignitable gas into a furnace as a fuel
source. The Agency did not propose fuel
substitution as a method because EPA's
knowledge about the use and suitability
of these wastes as fuels was limited.
However, Ihe characterization data
submitted during the comment period
indicate that most of the waste gases
currently treated by fuel substitution are
gases that can be used efficiently and
safely as fuels.
With respect to "incineration of
vented gases" as a treatment method,
EPA believes that there may be cases
when it is preferable to vent the gas into
an appropriate adsorbent material (e.g.,
water, solvents, activated cajbon) and
then to incinerate the adsorbed gas/
adsorbent material combination to
permanently remove the characteristic.
Additionally, a commenter said that for
small volume containers of ignitable
compressed gases (e.g., aerosol cans of
18 oz. or less), the containers can be fed
directly into the kiln and vented within
the kiln itself by the melting of the small
cans. The vented gases are then
incinerated in the kiln or afterburner.
One commenter described a method
of treatment for pyrophoric gases.
Typical gases in this class include
tributyl aluminum, dimethylzine,
triethylborane, and tetramethylin. The
commenter claimed that these gases,
because of their air reactive
characteristics, cannot be vented into an
incinerator without considerable risk.
The cominenter's method of treatment
for such gases has been by remote
control penetration and detonation
under a column of appropriate scrubbing
solution.
Another method of treatment
described by the commenters to
deactivate the ignitable characteristic in
some compressed gases is to chemically
oxidize them in an aqueous medium.
The commenters claimed that carbonyl
sulfide and methyl mercaptans are
efficiently treated by oxidation.
Chemical oxidation and chemical
redaction technologies include reactions
with reagents in aqueous mediums that
will oxidize or reduce the hazardous
constituents.
The Agency believes that all these
technologies can remove the
characteristic of ignitability and is
promulgating a treatment standard of
"Deactivation (DEACT) to Remove the
Characteristic of Ignitability" for the
Ignitable Compressed Gas Subcategory.
The Agency has established this
standard to allow the regulated
community the flexibility to use the
"best" technology for the specific
gaseous waste. See section 268
Appendix ¥1 of today's rule for a list of
applicable technologies that used alone
or in combination can achieve this
standard. (See also § 268.42 Table 1 for a
technical description of these
technologies. A five letter code
(acronym) for each technology has been
established in order to simplify the
tables.) This treatment standard will
apply to all forms of wastes to the
Ignitable Compressed Gases
Subcategory since the definitions of
wastewater and nonwastewater do not
apply to this group of wastes.
(3) Ignitable Reactives Subcategory,
The third Subcategory, the Ignitable
Reactives Subcategory, refers to those
DOOl wastes that exhibit the properties
listed in § 261.21(a)(2). These wastes are
typically generated on a sporadic basis
in low volumes and are characterized as
primarily inorganic solids or wastes
containing reactive materials. Ignitable
reactive materials include reactive
alkali metals or metalloids (such as
sodium and potassium] and calcium
carbide slags. Most of these are very
reactive with water and will generate
gases that can ignite as the result of heat
generated from the reaction with water.
Other reactive ignitable solids in this
Subcategory include metals such as
magnesium and aluminum that, when
finely divided, can vigorously react with
the oxygen in the air when ignited.
There appears to be an overlap
between wastes in this DOOl Subcategory
and certain D003 (characteristic of
reactivity) wastes, A close examination
of the definitions in § 261.21(a)(2) for
ignitable wastes and §§ 281.23(a) (2), (3).
and (6) for reactive wastes reveals the
distinction between these two groups.
The key difference is in the definition of
ignitable wastes, which states:
" * * * when ignited, bums vigorously
and persistently." This phrase implies
that the hazard is due primarily to the
ignition potential rather than to the
extreme reactivity.
The Agency proposed a treatment
standard of "Deactivation as a Method
of Treatment" for wastes in the DOOl
Ignitable Reactive Subcategory. The
Agency took this approach for these
wastes since the hazardous
characteristic is based on imminent
hazard (i.e., ignition and violent
reaction) rather than on other criteria
such as levels of hazardous constituents
and since technologies exist that can
completely remove this characteristic.
Current management practices for
some of these wastes, such as calcium
carbide slag, involve controlled
deactlvation with water. Other DOOl
Ignitable Reactives, such as those
containing reactive alkali metals
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22546 Federal Register /Vol. 55, No. 106 / Friday, June 1, 1990 / Rules and Regulations
(sodium or potassium) are sometimes
chemically deactivated using chemical
oxidation or chemical reduction
technologies. Several commenters stated
that incineration is also an appropriate
treatment method for these wastes.
Additionally, other commenters have
indicated that recovery technologies are
applicable for some wastes in this
subeategory. EPA also believes that
stabilization is an established
deactivation technique for safe and
equivalent management of reactive
ignitable materials since it accomplishes
results equivalent to those of other
technologies by isolating and
encapsulating the pyrophoric metal fines
and precluding conditions that could
cause ignition or reaction of the
material.
The Agency believes that chemical
oxidation, chemical reduction,
incineration, and recovery are all
applicable technologies for waste forms
in the D001 Ignitable Reactives
Subcategory because these technologies
will remove the characteristic of
ignitability. However, the Agency
believes that because of the diversity in
physical and chemical forms of the
wastes in the Ignitable Reactives
Subcategory it is not possible to
determine a "best" technology for all
wastes. EPA is promulgating a treatment
standard of "Deactivation (DEACT) to
Remove the Characteristic of
Ignitability" for the Ignitable Reactives
Subcategory. See section 268 Appendix
VI of today's rule for a list of applicable
technologies that used alone or in
combination can achieve this standard,
(See also § 268.42 Table 1 for a technical
description of these technologies. A five
letter code (acronym) for each
technology has been established in
order to simplify the tables.) This
treatment standard is established only
for nonwastewaters since ignitable
reactive wastes are described as being
very reactive with water and hence
cannot exist as wastewaters.
(4) Oxidizers Subcategory. The fourth
subcategory, the D001 Oxidizers
Subcategory, refers to those D001
wastes that exhibit the properties listed
in § 2ei.21(a){4) and meet the definitions
in 49 CFR 173.151. Several commenters
have asked for an elaboration of the
oxidizer definition because the DOT
definition is not definitive but rather
lists examples of oxidizing compounds.
EPA believes that D001 wastes in the
Oxidizers Subcategory are primarily
inorganic and include such things as
waste peroxides, perchlorates. and
permanganates. The Agency has very
limited information on the generation
and characterization of D001 wastes in
this subcategory. Currently, generators
must assess wastes for oxidizing
hazards by considering known oxidizing
constituents contained within the
wastes, and by the definition as outlined
in 49 CFR 173.151 which states;
"An oxidizer for the purpose of this
subchapler is a substance such SB a chlorate,
permanganate, inorganic peroxide, or a
nitrate, that yields oxygen readily to
stimulate the combustion of the organic
matter."
In other words, the presence of any
amount of the above substances does
not indicate that a material is an
oxidizer, rather one or more of these
substances must be present in a quantity
sufficient to yield oxygen and stimulate
combustion.
The Agency believes recovery for
reuse to be an applicable treatment for
wastes in this subcategory since it is
possible that certain aqueous solutions
of waste oxidlzers could be useful in the
treatment of other hazardous wastes.
These wastes must, however, be used as
treatment reagents in tanks and not in
surface impoundments because of the
potential release of heat and volatile
organics during the oxidation/reduction
reactions (see 40 CFR 2B4.229 and
265.229).
Several commenters wrote about
different technologies that are
applicable to wastes in the oxidizer
subcategory. One commenter generates
calcium hypochlorite and
trichlorocyanuric acid wastes that Fit
into the oxidizer subcategory. They are
both off-spec or contaminated
swimming poolchlorination chemicals.
The wastes are normally generated as
solids and routinely disposed of through
deactivation by adding the material to
large quantities of water (similar to its
use in swimming pools). Following the
deactivation, the waste is further treated
in a wastewater treatment facility.
During deactivation and treatment, there
is no release of chlorine gas. EPA
considers mixing with water followed
by chemical treatment to be applicable
for oxidizer wastes.
Additionally, the commenter pointed
out that both hydrogen peroxide and
nitric acid are oxidizers and that the
standard treatment for these chemicals
is dissolution in water followed by
neutralization. In the case of nitric acid,
the diluting in water is needed to
prevent an adverse reaction. Other
commenters use recovery and
incineration as treatment methods. The
Agency believes that all these
technologies are applicable for
treatment of oxidizer wastes since they
will remove the characteristic of
ignitability.
The Agency proposed a treatment
standard of "Deactivation" for wastes in
the D001 Oxidizers Subcategory. The
Agency took this approach for these
wastes since the hazardous
characteristic of these wastes is based
on imminent hazard, (i.e., oxidizers can
react violently with organics or other
materials and result in the rapid
generation of Fires) rather than on other
criteria such as levels of hazardous
constituents and since technologies
exist that can completely remove this
characteristic. EPA continues to believe
that this standard is appropriate for
wastes in the D001 Oxidizer
Subcategory and is promulgating a
treatment standard of "Deactivation
(DEACT) to Remove the Characteristic
of Ignitability" for the DOOl Oxidizers
Subcategory. See section 266 appendix
VI of today's rule for a list of applicable
technologies that used alone or in
combination can achieve this standard.
(See also § 268.42 Table 1 for a technical
description of these technologies. A five
letter code (acronym) for each
technology has been established in
order to simplify the tables.) This
standard will allow the regulated
community the flexibility to determine
the "best" treatment based on the
physical and chemical characteristics of
the oxidizer wastes.
BOAT TREATMENT STANDARDS FOR D001
ISNITABLE LIQUIDS 261.21(3)(1)
[NonwastevwtersJ—[High TOO Ignitable Uouids
Subcategory—Greater than or equal to 10% total
organic carbon!
Incinoratkm (INCIN), fuel substitution (FSUBS), or
recovery (RORGS) as a method of treatment"
BOAT TREATMENT STANDARDS FOR D001
IQNITABIE UQUIDS 26l.2l(a)(l)
tNormastewatera)—CLo* TOO Ignitable Liquids
Subcategory—Less than 10% total organic carbon]
Deactivation (DEACT) to remove the characteristic
ol ignitability*
BOAT TREATMENT STANDARDS TOR D001
IGNITABLE LIQUIDS 261.21 (a)(l)
[Waslewaters]
DaacUvation (DEACT) to remove the characteristic
of lomtabiliry'
4.'
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22547
BOAT TREATMENT STANDARDS FOR D001
IGNITABLE COMPRESSED GASES
261.21(a)(3)
DeactivaBon (DEACT) to remove the characteristic
ol ignitabilily*
BOAT TREATMENT STANDARDS FOR D001
IGNITABLE REACTIVES 261.21 (a)(2)
[Nonwastewaters]
Deactivation (DEACT) to remove the characteristic
ol kjnitjibility"
BOAT TREATMENT STANDARDS FOR D001
OXIDIZERS 261.21 (a)(4)
[Wastewaters and Nonwastewaters]
Deactivation (DEACT) to remove the characteristic
of ignitability'
* See 5 268.42 Table 1 in today's rule lor a de-
tailed description ol all technologies referred to by a
five letter technology code. See also pan; 268 ap-
pendix VI for a list of applicable technologies that
used alone or in combination can achieve deacttva-
bon of ignitability.
c. Corrosive Characteristic Wastes
Paraphrasing the criteria for defining
a D002 Corrosive waste (40 CFR 261.22),
a waste can be a D002 waste if it is
aqueous and has a pH less than or equal
to 2; or it is aqueous and has a pH
greater than or equal to 12.5; or it is a
liquid and corrodes steel at a specified
rate and temperature. EPA tentatively
determined at proposal that these
criteria translated into three
subcategories, the Acid Subcategory, the
Alkaline Subcategory, and the Other
Corrosives Subcategory (54 FR 48422). In
general, commenters supported this
subcategorization of D002 wastes.
Therefore, EPA is adopting this
classification scheme in the final rule.
(1) D002 A cid and Alkaline
Subcategories. The Acid Subcategory
and the Alkaline Subcategory, refer to
those D002 wastes that exhibit the
properties listed in 40 CFR 261.22(a)(l)
and are distinguishable by the
appropriate pH specifications. The Acid
Subcategory is defined as those wastes
with a pH of less than or equal to 2.0, •
and the Alkaline Subcategory is defined
as those wastes with a pH of greater
than or equal to 12.5. Also by definition
In § 261.22, D002 wastes in these two
subcategories only include wastes
which are considered to be "aqueous",
due to the fact that standard pH
measurement can only be performed in
the presence of significant amounts of
water (i.e., pH is the measure of the
concentration of hydronium ions in
water).
D002 wastes in the Acid Subcategory
typically include concentrated spent
acids, acidic wastewaters, and spent
acid strippers and cleaners. Wastes in
the Alkaline Subcategory typically
include concentrated spent bases,
alkaline wastewaters. and spent
alkaline strippers and cleaners. These
wastes represent a significant portion of
all hazardous wastes generated by
almost every industry.
EPA proposed a treatment standard of
"Base Neutralization to a pH 6 to 9 and
Insoluable Salts" for the D002 Acidic
Subcategory (54 FR 48422). Likewise,
EPA proposed a treatment standard of
Acid Neutralization to a pH 6 to 9 and
Insoluble Salts" for the D002 Alkaline
Subcategory (54 FR 48422).
(i.) Comments Concerning the
Proposed pH Requirements. Treatment
of acids and bases is generally referred
to as "neutralization". In the proposed
rule, the Agency interpreted this to
mean a pH range of 6 to 9. This range
was selected based on a rounding off of
the pH range found in fresh water
aquatic ecosystems through natural
carbonate/bicarbonate buffering (I.e.,
pH 5.5 to 8.5). While a "true" neutral pH
is equal to 7, by proposing the pH 8 to 9
range, the Agency was recognizing that
even in natural systems, pH can
fluctuate significantly. Thus, the
Agency's underlying premise was that
treatment of corrosive wastes should
result in a pH range (I.e., pH 6 to 9) that
was referred to as "neutral".
In addition, the Agency expressed
concern on whether a waste with a pH 2
to 6 could have a negative impact on the
effectiveness of a clay liner in mitigating
the mobility of hazardous constituents
from surface impoundments. In fact, this
was one of the major concerns of
Congress with respect to the statutory
land disposal restrictions imposed by
HSWA on all hazardous wastes with pH
less than 2. (See generally 52 FR 25760
through 25792 (July 8,1987) where EPA
codified these restrictions for all
corrosive wastes (without specifically
referring solely to D002 wastes.)).
EPA received many comments
pertaining to the impact that the pH
range of 8 to 9 would have on generators
and treaters of D002 wastes.
Commenters documented that enormous
disruptions of existing wastewater
treatment systems would occur if the
standard were promulgated with the
proposed pH restrictions. For example,
every surface impoundment or injection
well receiving commingled wastes
(some of which were D002 corrosive
wastes at the point of generation, but
once commingled were above pH 2 (or
below pH 12.5) and therefore no longer
considered hazardous by section 261.22)
that were outside of the pH 6 to 9 range
would be in violation of the standard.
This would effect thousands of such
units (most of which are RCRA subtitle
D units and hence not presently affected
by RCRA subtitle C).
With regard to the proposed pH 8 to 9
requirement for underground injection
units, several commenters stated that
the proposed pH range would cause
problems in many of the injection units
and wells, because some metals tend to
precipitate out of solution at these pH
ranges resulting in plugging in either the
injection unit itself or further inside the
well. Commenters also stated that
specific pH ranges are typically required
in permits for many underground
injection wells and are typically at
levels less than pH 8 to ensure that the
injected fluid flows properly through the
injection zone without plugging.
Another commenter remarked that
they treat an acidic D002 waste only to a
pH of 4.5 prior to commingling with
other wastes that require
biodegradation. This is done in order to
counter the production of alkaline
ammonia during the biodegradation
process, and thereby aids in maintaining
a "neutral" pH in the biodegradation
process.
Other commenters pointed out that a
pH of 10 is often considered the
optimum pH for removal of most metals
from wastewaters and that requiring a
pH of 8 to 9 would cause severe
disruptions in most metals removal
treatment systems. These treatment
systems generally consist of chemical
precipitation in tanks to remove metals
followed by neutralization of the
effluent in surface impoundments prior
to discharge.
As a result of all of the comments on
pH ranges mentioned above and for the
reasons mentioned below, the Agency is
not promulgating the proposed pH range
of 6 to 9. While the Agency maintains
that in some cases a pH of 8 to 9 may be
considered desirable, the Agency
believes the Clean Water Act. end-of-
pipe, NPOES limitations will address
these specific situations, where water
quality issues are of concern
(specifically where discharges of such.
neutralized wastewaters are into fresh
water ecosystems). (Note: The Agency
points out that pH is commonly already
regulated for such discharges.)
The Agency also notes that liquids are
not allowed in subtitle C landfills under
section 3004(c). As mentioned by the
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Federal Register / Vol. 55, No. 106 / Friday. June 1, 1990 / Rules and Regulations
eommenters (and discussed above),
requiring a pH range of 6 to 9 before
discharge to most surface
impoundments will cause severe
disruptions in existing treatment
operations. Additionally, the Agency
believes that its concern regarding the
impact of corrosive wastes on the
integrity of clay liners is addressed
mostly by the statutory restrictions on a
pH of less than 2. The Agency currently
has little data on the impact that wastes
containing pH of 2 to 8 may have on clay
liners. Finally, regarding the proposed
pH range, the Agency did not intend to
Interfere with optimum pH levels
desired for treatment of metals in tanks,
nor did it intend for these standards to
interfere with other legitimate
wastewater treatment operations (such
as the biotreatment processes
mentioned by the commenter).
(ii.) Comments Concerning the
Proposed Acid and Base Requirements.
EPA additionally proposed that
"neutralization" of wastes in the D002
Acidic and Alkaline subcategories be
accomplished specifically through the
use of the corresponding neutralization
chemicals (i.e., acids to neutralize the
Alkaline Subcategory and bases to
neutralize the Acidic Subcategory}. As
commenters quickly pointed out, almost
all chemicals (including water which
dissociates into hydronium and
hydroxide ionsj have some acid
character and some basic character
depending upon the reference chemical.
That is what is historically been taught
in academia as the "Lewis Acid
Theory". The Agency never intended to
dispute basic chemical theory, but was
merely stating its preference to
neutralize the corrosive characteristic of
these wastes with chemicals that would
result in an overall reduction in total
dissolved solids in effluent (i.e., the use
of these chemicals is coupled with the
concept of the proposed requirement to
create insoluble salts rather than the
concept of neutralization to a specific
pH) (See also the discussion on
insoluble salts in the preamble
discussion following this one.)
With respect to the use of these
chemicals (i.e., acids and bases) to
achieve the treatment standard, several
commenters stated that it is not always
necessary to use chemicals that are
specifically identified as commercial
aaas or bases to achieve treatment of
DGC2 wastes. In fact many facilities
generate both acidic and alkaline
wastes (often from different processes)
and commonly use them to neutralize
each other. This situation also occurs at
commercial hazardous waste treatment
facilities, h thnt the facilities will take
acid wastes from various generators and
will neutralize them with alkaline
wastes from other generators. In
general, commercial acids and bases are
used to complete the neutralization
processes and often are used only for
pH adjustment of the final wastewater
discharges. Many commenters also
pointed out that the mixing of D002
corrosive wastes with other
wastewaters (even other acidic,
noncorrosive wastes) will contribute to
an overall neutralization due to the
resultant change in pH. This is because
pH is merely a measure of the
concentration of hydronium ions {H*J in
water and is dependent upon the
equilibrium constant for the dissociation
of water into hydronium and hydroxide
ions. As more water is present, the
equilibrium will be shifted and thereby
increase the pH; resulting in
"neutralization." Because of this, EPA is
specifically allowing mixing of D002
wastes with each other and with other
wastewaters to remove the
characteristic of corrosivity (i.e.,
resulting in a pH between 2 and 12,5).
However, EPA's allowance of mixing
wastes to remove corrosivity does not
override other prohibitions on dilution
of wastes for other purposes (i.e., this
does not override other dilution
prohibitions that may be applicable for
other wastes).
Many commenters declared that
incineration should also be allowed as
treatment for D002 wastes, especially for
organic acids, mixed D001/D002 waste
streams, and other D002 wastes with
organics. Pollution control devices on
incinerators will remove corrosive gases
from the burning of these D002 wastes.
Alkaline scrubber waters are often
employed in these air pollution control
devices hi order to neutralize acidic
emissions. These scrubber waters are
then further neutralized if necessary.'
The Agency agrees with the commenters
that incineration is an applicable
treatment method for some D002 wastes
and is thus not precluding incineration
as treatment of D002 wastes.
(iii.) Comments Concerning the
Insoluble Salt Requirement. The Agency
proposed that neutralization of wastes
in the D002 Acid and Alkaline
Subcategories should be required to
result in insoluble salts. The reason was
that the Agency felt that the overall
dissolved solids loading on fresh water
aquatic systems could be reduced by
establishing such a standard, even
though it would result in an insoluble
sludge that would require landfilling.
The Agency believed that such a
standard would discourage the
generation of D002 acids and alkaline
wastes and thereby promote
minimization/source reduction as well
as recycling of acids (either directly or
after some form of pretreatment). While
the Agency maintains that the goal
behind the proposed standard is
consistent with national policy on wasle
minimization and the Agency's overall
concerns on cross-media impacts of
both hazardous and nonhazardous
constituents on the entire environment,
many commenters presented technical
complications with the proposed
requirement on insoluble salts that the
Agency has found persuasive.
The Agency received numerous
comments concerning this proposed
requirement indicating that
neutralization and formation of
insoluble salts is either impractical or
technically impossible for some of the
most commonly used acids and bases
that become DOC2 wastes (such as nitric
acid, hydrochloric acid, sodium
hydroxide, potassium hydroxide, other
acid halides). Because the salts
generated from the neutralization of
these particular acids and bases are
very soluble in water, the proposed
requirement to generate insoluble salts
would result in treatment with exotic
chemicals in order to comply (if there
are any methods at all to create
insoluble salts). The Agency concurs
with the commenters. This is further
supported by the fact that almost all
nitrate and chloride salts of the major
metals are very soluble in water.
Other commenters stated that
requiring the formation of insoluble salts
often will nsgate the use of alkaline and
acidic process wastes that are generated
on-site for neutralization. This would in
effect, result in double the volume of
insoluble salts that would have to be
disposed and use up valuable virgin
commercial acids and bases that
otherwise would not be needed. As
stated in the preceding sections of this
discussion on corrosive wastes, the
Agency never intended to preclude such
on-site neutralization with wastes, and
agrees that this would probably result in
an unnecessary use of virgin materials
for waste treatment.
Additionally, one commenter points
out that in many cases neutralization of
D002 wastes that contain organics, is
often a necessary pretreatment step foi
other treatment processes (such as
steam stripping, biological treatment
and/or carbon adsorption) that remove
or destroy the organics in the waste. If a
sludge must be formed during the
neutralization process, organic
constituents that could have been
destroyed or removed while in the
wastewalers are instead being •
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22549
transferred to the solid phase where
they will be either disposed of untreated
or where they may require treatment
with incineration. The Agency shares
the commenters concerns on treatment
of organics in D002 wastes.
As a result, the Agency is
withdrawing the requirement for
neutralization to insoluble salts for
wastes in the D002 Acid and Alkaline
subcategories. In doing so, the Agency's
concerns of using acids and bases to
provide neutralization is a moot point.
(iv.) Promulgated Treatment
Standards. For the reasons outlined in
the previous discussions, the Agency is
withdrawing the proposed treatment
standards for D002 Acid and Alkaline
Subcategories. The Agency considered
promulgating a treatment standard as a
specified technology, namely
"Neutralization". However, the Agency
found that in certain cases,
"incineration" and "recovery" processes
were also quite applicable to wastes in
these subcategories.
In addition, many D002 wastes also
are hazardous for other reasons, and
may requke that additional treatment
processes be employed besides
neutralization, incineration, or recovery.
For example, a facility may have
interpreted that biodegradation would
have been precluded from use, for a
D002 waste that also contained
organics. Since biodegradation may
have actually been a technically viable
alternative for this waste, the facility
would have had to submit a petition for
a (Testability variance. While the
Agency probably would have granted it,
the variance process would have
created an unnecessary burden on both
the regulatory and regulated community,
and probably without incurring any
additional protection of human health
and the environment.
As a result, EPA is promulgating a
general treatment standard for wastes in
the D002 Acid and Alkaline
Subcategories that allows the use of any
appropriate treatment technology,
namely: "Deactivation (DEACT) to
Remove the Characteristic of
Corrosivity", This means that the facility
may use any treatment (including
neutralization achieved through mixing
with other wastewaters) that results in a
pH above 2 but less than 12.5, and
thereby removes the characteristic of
corrosivity. See section 268 Appendix VI
of today's rule for a list of applicable
technologies that used alone or in
combination can achieve this standard.
(See also § 268.42 Table l for a technical
description of these technologies. A five
letter code (acronym) for each
technology has been established in
order to simplify the tables.)
EPA has adopted this standard, in
part, to avoid the massive disruptions to
wastewater treatment systems that
would have resulted from the proposed
standard (which impacts far exceeded
any others that would have resulted
under the proposed rule), and because
the final standard does require the
removal of the property of corrosivity.
Corrosivity is not defined in the same
way EP Toxic wastes are defined.
Corrosivity is not based on a toxic
constituent, where the environmental
concern is mass-loading in the
environment. With respect to the issue
of toxics present in these corrosive
wastes, EPA notes that if a corrosive
waste also exhibits the toxicity
characteristic, it must be treated to meet
the treatment standard for the toxic
constituent as well (see generally
section III.A.l. of this preamble).
The Agency received many comments
regarding non-liquid wastes that are
corrosive and the applicability of
treatment technologies for aqueous and
liquid corrosive wastes to treat non-
liquid corrosive wastes, The proposal
did not specifically address corrosive
solids because there is not a definition .
of corrosive solids in § 261.22 at this
time..Until the Agency amends § 261.22
to include a definition for corrosive
solids and promulgates a treatment
technology, generators must prudently
handle wastes with regard to known
hazards. Although not required under
current regulations, many generators of
corrosive solids prefer to classify these
•wastes as D002 corrosives and choose
waste management and disposal
protocols accordingly in an added effort
to protect the environment.
(2) Other D002 Corrosives. The third
major subcategory is classified as the
Other Corrosives Subcategory and is
defined as those D002 wastes that
exhibit corrosivity to steel as defined in
§ 28l.22(a)(2). They often are
nonaqueous corrosive wastes such as
certain organic liquids, but can
represent inorganic chemicals as well.
Wastes in the Other D002 Corrosives
Subcategory are generated on a
sporadic basis and generally in low
volumes. The Agency suspects that
these wastes are often identified as
corrosive without performing the
specified testing with steel (I.e., the
corrosivity of the waste may be
assumed due to the presence of known
corrosive constituents). This may also
be due, in part, to the high cost of testing
and to the difficulties in identifying
laboratories that are experienced in
steel corrosion testing.
The physical and chemical
characteristics of this group of wastes
vary greatly. The wastes may be
aqueous or they may be primarily
organic. In addition, a large variety of
corrosive chemicals may appear as
constituents in this type of corrosive
waste. Depending on the concentration
of these corrosive chemicals, they may
corrode SAE1020 steel. Examples of
chemicals that may contribute to
corrosivity include ferric chloride.
benzene sulfonyl chloride,
benzotrichloride, acetyl chloride, formic
acid, hydrofluoric acid, some catalysts,
various resins, metal cleaners, and
etchants. Highly concentrated acids that
have no water may also be included in
this subcategory, since pH
measurements are not possible on these
wastes.
Wastes in the Other Corrosives
Subcategory are often treated by
deactivating the corrosive constituents
of the waste with an appropriate
chemical reagent. Wastes that contain
high concentrations of corrosive
organics are often incinerated; however,
due to the great variety of potential
corrosive organics, the Agency does not
believe that it should establish
concentration-based standards based on
incineration for these DOOZ wastes.
Removal and recovery of either organic
or inorganic corrosive constituents may
also be applicable technologies, since
recovery could extract the corrosive
constituents until the waste itself is no
longer corrosive to steel.
EPA proposed a treatment standard of
"Deactivation" for D002 wastes in the
Other Corrosives Subcategory. The
Agency took this approach for these
wastes since the hazardous
characteristic is based on imminent
hazard (i.e., the corrosivity to steel may
cause rupture of a tank or container,
thus releasing the contents either
suddenly or through leaks) rather than
on other criteria such as levels of
hazardous constituents, and that
technologies exist that can completely
remove this characteristic.
EPA continues to believe that the
proposed standard is appropriate for
wastes in the D002 Other Corrosives
Subcategory and is promulgating a
treatment standard of "Deactivation
(DEACT) to Remove the Characteristic
of Corrosivity". See section 288
Appendix VI of today's rule for a list of
applicable technologies that used along
or in combination can achieve this
standard. (See also § 268.42 Table 1 for
a technical description of these
technologies, A five letter code
(acronym) for each technology has been
established in order to simplify the
tables.) This standard will allow the use
of the "best" treatment based on the
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22550 Firfeial legbter / Vol. 55. No. 106 /Friday. |ane 1. 1990 / Rolea and Regulations
chemical and physical characteristics of
the waste.
BOAT TREATMENT STANDARDS FOR 0002
Mm SUBCATEGORV 261^2(a)(1)
DeacthiaHon (DEACT) to remove the characteristic
of corrosnrity*
BOAT TREATMENT STANDARDS FOR 0002
ALKAUNE SUBCATEGORY 261.22(a)(1)
Deacthraticn (DEACT) to remove the characteristic
Of corroSMly*
BOAT TREATMENT STANDARDS FOR 0002
OTHER CORROSIVES 26l.22(a)(2)
DeaetwaHon (DEACT) to remove the charactertrtc
o» corroswrty*
•See section 268 appendix VI of today's rule (or a
list of applicable tachnotogtta that uaed atone or In
combination can achieve this standard See also
$268.42 Table 1 for a description of the technol-
ogies indicated by a live loiter code.
d. Reactive Characteristic Wastes
According to 40 CFR 261.23, there are
eight criteria for defining a waste as a
D003 Reactive waste. Paraphrasing
these criteria, a waste can be a D003
waste if: (1) It is unstable and readily
undergoes violent changes without
detonating; or (2) it reacts violently with
water; or (3) it forms potentially
explosive mixtures with water; or (4)
when mixed with water, it generates
toxic gases; or (S) it is a cyanide or
sulfide bearing waste which under
certain conditions can generate toxic
gases; or (6} it is capable of detonation
or explosive reaction if it is subjected to
a strong initiating source or if heated
under confinement; or (7) it is readily
capable of detonation or explosive
decomposition or reaction at standard
temperature and pressure; or (8) it is a
forbidden explosive, a Class A
explosive, or a Class B explosive.
EPA tentatively determined at
proposal that these eight criteria
translated into five subcategories for
D003 wastes (54 PR 48424). Commenten
concurred with these classifications.
The first subcategory is classified as the
Reactive Cyanides subcategory and
refers to those D003 wastes that exhibit
the properties listed in 5 261-23(a)(5) for
cyanide. The second subcategory is
classified as the Explosives subcategory
and refers to those DOC3 wastes that
exhibit the properties listed in
!§ 261.23(a)(6) through 261.23(a)(8). The
third subcategory is classified as the
Water Reactive subcategory and refers
to those D003 wastes that exhibit the
properties listed in If 281.23(a)(2)
through 261.23(a)(4). The fourth
subcategory is classified as the Reactive
Sulfides subcategory and refers to those
D003 wastes that exhibit the properties
listed in { 261.23[a)(5) for sulfide. The
fifth subcategory is classified as the
Other Reactives subcategory and refers
to those D003 wastes that exhibit the
properties listed in § 261.23(a)(l),
For all subcategories of D003 wastes
except the Reactive Cyanides, the
Agency believes that development of
concentration-based treatment
standards would be difficult because
there are no known analytical tests that
are specifically designed to measure the
particular reactivity associated with
each D003 treatability subcategory, nor
is there a test that distinguishes the
reactive chemical from the deactivated
chemical.
The Agency solicited comments and
data on the physical and chemical
characterization of all five subcategories
of D003 wastes. The Agency also
requested comment on the applicability
of chemical deactivation, incineration,
and any other type of chemical or
physical deactivation technology to
these wastes.
(1) Reactive Cyanides. D003 wastes in
the Reactive Cyanides Subcategory are
by definition those cyanide-bearing
wastes that generate toxic gases
(assumed to be hydrogen cyanide) when
exposed to pH conditions between 2 and
12,5, in a sufficient quantity to present a
danger to human health and the
environment (40 CFR 281.23(a)(5)).
Commenters requested clarification of
which analytical methods should be
used to determine reactive cyanide and
associated toxic gas liberation. EPA's
approved analytical procedures can be
found in SW-846 VoL 1C Chapter 7
which defines the characteristic and
regulation of reactive wastes.
Specifically, Section 7.3.3.2 describes the
"Test Method to Determine Hydrogen
Cyanide Released from Wastes" which
outlines the correct procedure of
hydrogen cyanide gas liberation from
reactive wastes. Method 9010 is the
analytical method for quantitatively
determining reactive cyanide
concentrations.
The reactive cyanide wastes typically
are generated by the electroplating and
metal finishing industries, and include
mixed cyanide salts, cyanide solutions,
and cyanide-bearing sludges. Most of
the volume of all D003 waste* that are
generated can be identified as wastes
belonging to the Reactive Cyanides
Subcategory. Reactive cyanide wastes
are not typically placed directly in most
types of land disposal units without
treatment; however, it is possible that
some untreated wastes are placed in
surface impoundments.
Reactive cyanide wastes (like other
reactive wastes) are already subject to
special requirements prior to disposal in
landfills, surface impoundments, and
waste piles under existing regulations.
Also, as a July 8,1987 (the statutory
deadline for the California list
prohibitions), liquid hazardous wastes
having a free cyanide concentration in
excess of 1,000 mg/kg (ppm) were
prohibited from land disposal. No one
has suggested, however, that these
existing regulations and prohibitions are
sufficient to apply to the Reactive
Cyanides Subcategory. The statute did
not specifically identify the California
list cyanides as D003 wastes, and
furthermore, it did not specify a required
method of treatment, nor did it establish
the 1,000 mg/kg prohibition level as a
"treatment standard".
The Agency believes that simple
cyanides (e.g. NaCN, KCN] are more
likely to react to liberate hydrogen
cyanide gas since they are soluble and
have weaker bond energies than
complex cyanides (e.g., Fes[Fe(CN)«]z,
Ni[Fe(CN)]z. ZnsFe(CN]e). Consequently,
EPA believes that simple cyanide rather
than complex cyanide is the cyanide
form most likely to give a waste
containing cyanide the characteristic of
reactivity. Accordingly, the Agency
believed at the time of proposal that
most D003 nonwastewaters resembled
wastes containing simple cyanides (i.e..
FOIL F012 and P030) rather than wastes
containing complex cyanides (i.e, F006,
FOOT, F008, FOOT). Treatment
technologies applicable for treatment of
D003 reactive cyanide wastes include
electrolytic oxidation, alkaline
chiorination and wet air oxidation.
The Agency proposed to transfer the
treatment performance of simple
cyanide nonwastewaters (i.e., mixture of
Foil and F012) using electrolytic
oxidation followed by alkaline
chiorination developed in the Second
Third final rule (54 FR 28594, June 23,
1989), the nonwastewaters in the
Reactive Cyanides Subcategory (54 FR
48425). In other words, the Agency
believed all D003 reactive cyanide
nonwastewaters could be treated to a
total cyanide level of 110 mg/kg and an
amenable cyanide level of 9.1 mg/kg
representing treatment of wastes
containing simple cyanides (Le.» Foil
and F012) instead of a total cyanide
level of 590 mg/kg and an amenable
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Foderal Register / Vol. 55, No. 108 / Friday. June 1. 1990 / Rules and Regulations
22551
cyanide level of 30 ing/kg representing
treatment performance of wastes
containing compiexed cyanides (i.e.,
FOOO-F009), For wastewaters in the
Reactive Cyanides Subcatogory, EPA
proposed to transfer treatment
performance from treatment of FOQ6-
FGC9 wastewaters using alkaline
chlorinalion, since this is the best
treatment data available to the Agency
for wastewa'ers containing high
concentrations of cyanides.
With respect to the transfer being
valid, several commenters submitted
data indicating that D003 wastes in the
Reactive Cyanides Subcategory more
closely resemble the wastes containing
compiexed cyanides rather than the
wastes containing simple cyanides and
that the proposed treatment levels were
unachievable for some D003 wastes
because of the presence of iron cyanide
and other cyanide complexes. One
commenter claimed that, in many cases,
iron contamination in some DC03
cyanide wastes is unavoidable due to
normal process operation and that a
threshold level of only 50 to 100 rag/kg
of iron is required to result in formation
of iron cyanide complex.
Based on the high iron contents shown
to be present in some D003 cyanide
wastes, the Agency believes that some
D003 cyanide wastes may contain
compiexed cyanides ar.d thus may not
be treatable to the 110 mg/kg level. One
commenter suggested that the Agency
develop two treatability groups for
nonwastswater forms in the DOM
Reactive Gytnidss Subcategory based
on the concentration of complex cyanide
presant in the waste: one group for
wastes containing mostly simple
cyanides (i.e., less than 110 mg/kg
complex cyanide) and the other group
for wastes containing high
concentrations of compiexed cyanides
(i.e.. greater than 110 mg/kg complex
cyanide). EPA believes that this concept,
while desirable, may not be viable
because of the analytical interferences
caused by the complicated matrices of
untreated wastes. Furthermore, the */ast
majority of characterization data
submitted during the comment period
seem to indicate that D003
nonwastewalers more closely resemble
the FOQ8-F009 nonwastewaters instead
of the Foil and F012 nonwastewaters.
Therefore, the Agency is promulgating a
treatment standard of 590 mg/kg total
cyanide and 30 mg/kg amenable
cyanide based on the treatment of
wastes containing complex cyanides
(i.e., F008-F009 nonwastewaters) for
nonwastewaters in the D003 Reactive
Cyanide Subnategory.
For the waste waters in the DOCS
Reactive Cyanide Subcategory, EPA
proposed a treatment standard of 1.9
mg/1 total cyanide and 0.1 rag/1
amenable cyanide based on alkaline
• chlorination. Comments and data were
received from Sterling Chemicals
demonstrating that alkaline chlorination
did not achieve those limits for D003.
Further examination of categorical
wastewater discharge standards,
pursuant to the Clean Water Act,
supported the inability of alkaline
chlorination to achieve the proposed
amenable cyanide leveL EPA is
promulgating an amenable cyanide
standard of 0.36 mg/1 based en the
Metal Finishing categorical wastewater
discharge standards. Data submitted by
Sterling Chemicals demonstrated
compliance with this limit With regard
to total cyanide, the Agency is reserving
the standard for further analyses to
resolve the substantial variation in total
cyanide levels submitted by comraenters
and standards established for
categorical wastewater discharges. In
the interim, the amenable cyanide limit
will insure that alkaline chJorination of
equivalent BDAT technology is utilized
to comply with the land disposal
restriction for reactive cyanide D003
wastes.
The Agency has chosen a
concentration based treatment level for
wastes in the D003 Reactive Cyanide
Subcategory rather than establish
"Deactivation (DEACT) to Remove the
Characteristic of Reactivity" for the
following reasons: First, unlike the other
characteristic wastes, the Agency can
identify an indicator compound (i.e.,
cyanide) that is known to be present in
all D003 reactive cyanide wastes and
can analyze the indicator compound in
wastewater and nonwastewater
matrices with EPA-approved SW 848
analytical test methods. (See also
section iHA.6.(a) of today's preamble
for a further discussion of cyanide
treatment standards for other wastes
and a clarification of the analytical
methodology for compliance with the
promulgated standards.) Second, EPA
believes most D003 cyanide wastes are
generated from the same types of
processes that generate the F008-FQ12
and PQ30 wastes and thus, are
frequently of the same type, and present
similar risks when land disposed as the
listed wastes. EPA does not believe that
Congress precluded the Agency from
establishing the same treatment
standards for the D003 wastes that have
been established for the listed wastes
(assuming, of course, that such
standards are consistent with the
command of section 3004{n:} to reduce
toxicity or mobility so that risks to
health and the environment are
minimized). Finally, the Agency suspects
that some generators ore currently
misclassifying FOQ8-F012 and P030
wastes as D003 reactive cyanide wastes.
While this is primarily an issue for
enforcement, the Agency is concerns*
that a less stringent standard would
discourage proper identification of the F
and P cyanide wastes.
The Agency realizes that reactive
cyanide wastes treated to meet the
promulgated standard may no longer
exhibit the characteristic of reactivity
(although the determination of reactivity
can sometimes be difficult due to the
non-quantified standard in
I 261.23(a)(5)), The Agency believes this
appropriate, As discussed in section
IILD., the Agency sees no legal bar in -
establishing treatment standards that
are below the characteristic level Doing
so is appropriate for these wastes
because the reactivity characteristic
does not evaluate the toxic nature of tha
wastes, because Congress specifically
intended that cyanides be destroyed
where possible (see statement of
Senator Chafce, 130 Cong. Rec. S 9178-9
(July 25,1984)), and because the Agency
believes the similarity of most D003
wastes and the F006-FOQ9 wastes
warrants the same treatment standards
for each in order to satisfy the section
3004(m) standard.
(2) Reactive Sulfides Subcategor/.
D003 wastes in the Reactive Sulfides
Subcategory are by definition those
sulfide-bearing wastes that generate
toxic gases (assumed to be H2S) when
exposed to a pH between 2 and 12.5, in
a sufficient qnantity to present a danger
to human health and the environment.
Currently the accepted method for
quantitatively determining reactive
sulfides is outlined in SW-848, Vol. 1C, .
I 7.322. and in Method 9030.
The Agency is in the process of
developing a quantitative threshold for
toxic gas generated from reactive sulfide
wastes. The interim value the Agency is
considering is 500 mg of HaS generated
per kilogram of waste. Although this
number is only an interim guideline for
the purpose of BDAT determinations,
the Agency proposed to use this number
to identify the wastes in this
subcategory (given the need for an
objective means of determining the
subcategory's applicability). The Agency
received several comments stating that
a test method should be finalized and a
rationale published prior to setting this
threshold as a numerical standard. EPA
agrees with the commenters that for
wastes in this subcategory the test
method used in determining how much
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22552 Federal Register / Vol. 55. No. 106 / Friday, June 1. 1990 / Rules and Regulations
gas can oe released from a waste needs
to be standardized before establishing a
concentration based treatment standard
with the test methods. Accordingly, the
Agency's action today should not be
viewed as redefining the characteristic
for sulfide-bearing wastes.
Reactive sulfides may be treated and
chemically converted to relatively inert
sulfur, to insoluble metallic sulfide salts,
or to soluble sulfates that can be
removed or recovered. Some data
indicate that these wastes can be
treated by alkaline chlorination,
specialty incineration, or other chemical
deactivation techniques. The Agency
believes that some of these wastes may
also be contaminated with organic
sulfides known as mercaptans. These
malodorous chemicals are believed to
complicate the treatment of these
reactive sulfide wastes. It is believed
that these wastes have posed particular
treatment problems for the petroleum
refining industry and the paper and pulp
industry.
The Agency solicited waste
characterization and treatment data that
could potentially be used to develop
treatment standards for these wastes.
One commenter sent data demonstrating
that treatment with chlorine dioxide is a
very effective technology for destroying
organic sulfides and mercaptans in
petroleum wastes. Another commenter
submitted stabilization data indicating
that this treatment process can treat
D003 reactive sulfide wastes by
removing the characteristic. One
commenter uses mercaptan-free and
organic-free sulfide wastes to
precipitate metals from wastewater.
Another commenter uses a thermal
process that converts aulfides to sulfates
instead of sulfur oxides.
The Agency proposed a treatment
standard of "Alkaline Chlorination,
Chemical Oxidation, or Incineration
Followed By Precipitation to Insoluble
Sulfates" for the Reactive Sulfide
subcategory. (Note; While alkaline
chlorination is a form of chemical
oxidation, the Agency did not want to
specifically preclude the use of any
particular oxidant.)
Because of the variety of treatment
processes currently used to treat
reactive sulfide wastes, the Agency is
promulgating a treatment standard of
"Deactivation (DEACT) to Remove the
Characteristic of Reactix'ity" for
non waste waters and wastewaters in the
D003 Reactive Sulfides Subcategory to
allow the treatment facility the
flexibility to use the "best" technology
for the particular wasle stream. See
section 288 Appendix VI of today's rule
for a list of applicable technologies that
used alone or in combination can
achieve this standard. (See also § 268.42
Table 1 for a technical description of
these technologies. A five letter code
(acronym) for each technology has been
established in order to simplify the
tables.) The treatment standard is
expressed as required methods of
treatment rather than as a
concentration-based standard because
the Agency has not approved a standard
analytical method for testing either
sulfides or "reactive" sulfides in
hazardous wastes or in treatment
residues (however, as noted above, the
Agency is working to develop a
quantitative threshold for reactive
sulfides). In the future the Agency may
establish numerical standards for
wastes in this subcategory,
(3) Explosives Subcategory. D003
wastes in the Explosives Subcategory
are by definition those wastes that are
capable of detonation or explosive
reaction under various conditions, or are
forbidden. Class A, or Class B
explosives (according to 49 CFR 173.52,
173.53, and 173,88 respectively).
Commenters expressed concern that
many types of waste may fall into a
potentially explosive classification, and
requested a standardized procedure for
making a reactivity determination to
assist in the classification of explosive
hazardous wastes. The Agency chose to
rely on the current descriptive definition
primarily because the available tests for
measuring the various classes embraced
by the reactivity definition suffer from
some deficiencies.
In 1984, under an interagency
agreement with the Bureau of Mines
(BOM), OSW sponsored research on
two test methods designed to determine
whether a substance had explosive
properties. However, in June 1885, the
Agency issued Memorandum #7
[OSWER Dir. 9445.04(85)) that explained
that the BOM test results were
inconclusive, and in the interim, OSW
supported the use of a battery of tests
submitted by the U,S. Army to the
Agency. Information on these Army
tests can be obtained from the Office of
Solid Waste's Methods Section (202-
382-4770).
Wastes classified as D003 and
belonging to the explosives subcategory,
have typically been identified as being
generated by the explosives industry
and by the U.S. Department of Defense.
While these wastes are not generated as
•frequently as the reactive cyanides, they
are generated more often than all other
reactive subcategories. Explosives are
already subject to special requirements
prior to disposal in landfills, surface
impoundments, and waste piles under
existing regulations. These explosive
wastes are not typically placed in most
types of land disposal units; rather,
commenters have indicated that they
can be treated by technologies such as
chemical oxidation or incineration. Such
treatments permanently remove the .
explosive characteristic of this D003
waste by thermal or chemical
destruction of explosive constituents.
Incineration is an applicable
technology for some D003 explosive
wastes. Such units are not typically
found at commercial incineration
facilities. The Agency is aware that
incineration units specially designed
and fitted with explosion-proof
equipment are currently used by the
Department of Defense to treat
explosive wastes. One commenter
suggested that the Agency divide the
explosive wastes into incinerable and
nonincinerable wastes. EPA, however,
could not make a determination of
explosive wastes that could always be
incinerated 100% of the time as
generated.
The Agency proposed a general
standard of "Deactivation" for the D003
Explosives Subcategory. By establishing
this standard, the Agency is allowing
the regulated community to use that
treatment technology (e.g., incineration,
chemical deactivation) that best fits the
type of explosive waste. The Agency
took this approach for these wastes
since the hazardous characteristic is
based on imminent hazard (i.e.,
explosiviry) rather than on other criteria
such as levels of hazardous constituents,
and because technologies exist that can
completely remove this characteristic.
Due to the large number of explosive
formulations and the difference in
applicable, treatments (see Department
of .the Amy Technical Manual TM&-
1300-214, Military Explosives), the
Agency continues to believe that the
proposed standard is applicable for
wastes In the D003 Explosive
Subcategory and is promulgating a
treatment standard of "Deactivation
(DEACT) to Remove the Characteristic
of Reactivity" for nonwastewaters and
wastewaters in the D003 Explosive
Subcategory. See section 268 Appendix
VI of today's rule for a list of applicable
technologies that used alone or in
combination can achieve this standard,
(See also ! 268.42 Table 1 for a technical
description of these technologies. A five
letter code (acronym) for each
technology has been established in
order to simplify the tables,) This
standard should provide treaters of
explosive wastes the ability to use the
"best" treatment technology based on
the chemical and physical parameters of
the explosive waste, and any safety
considerations.
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Federal Register / Vol. 55, No. 108 / Friday, Jane 1, 1990 / Rules and Regulations
22553
Several comraenters have indicated
that mixing with water or organic
liquids (i.e., kerosene) may be necessary
in some cases to reduce potential for
explosion and thus, ensure safe handling
snd/or transportation for subsequent
incineration or chemical treatment of
explosive wastes. EPA is not restricting
the use of this practice for any waste in
the D003 Explosives Sabcatcgory.
(4) Water Reactive and Other
Reactives Subcategories. D003 wastes in
the Water Reactive or Other Reaclives
Subcategories can be either organic or
inorganic. Water Reactive D003 waste*
as defined in 40 CFR 261.23{a)(2), (3),
and (4J are either very reactive with
water, or can generate toxic or
explosive gases with water. These
reactions are usually very vigorous and
therefore difficult to control. Wastes
considered to belong in D003 Other
Reactives Subcategory exhibit the
property Listed in | 261.23(a)fl). Wastes
in both of these Subcategories are
generated on a sporadic basis and
generally in low volumes. These wastes
are not typically placed in land disposal
units nor are they placed In surface
impoundments due to their violent
reactivity.
The Agency has information
suggesting that some water reaclivas are
treated try Incineration. During this
thermal oxidation process, the reactive
organic constituents are destroyed and
the reactive inorganic constituents form
less hazardous oxides. Other applicable
treatment technologies include
controlled reactions with water,
chemical oxidation and chemical
reduction. All the above-mentioned
technologies can remove the
characteristic of reactivity.
The Agency proposed a general
standard of "Deactivation" for the DC03
Water Reactives and Other Reectives
Subcategories. The Agency chose this
approach for these wastes since the
hazardous characteristic is based on
imminent hazard (i.e., potential violent
reactions with water) rather than on
other criteria such as levels of
hazardous constituents, and that
technologies exist that can completely
remove these reactive characteristics.
Because of the diversity in physical
and chemical forms of me waste in both
subcategories, it is not possible to
determine a "best" technology for all
wastes. The Agency is promulgating a
treatment standard of "Deactivation
(DEACT) to Remove the Characteristic
nf Reactivity" for wastes in the D003
Water Reactives Subcategory and D003
Other Reactives Subcategory to allow
flexibility in the selection of the "best"
technology. See section 268 appendix VI
of today's rule for a list of applicable
technologies that used alone or in
combination can achieve this standard.
(See also | 288,42 Table 1 for a technical
description of these technologies. A five
letter code (acronym) for each
technology has been established in
order to simplify the tables.) For wastes
in the D003 Water Reactives
Subcategory, the standard is established
only for norrwastewoters since these
wastes are very reactive with water and
thus cannot exist as wastewaters.
Several commenters have Indicated
that mixing with certain organic liquids
(such as kerosene) may be necessary in
Dome cases to reduce potential for
violent reaction with water and thus,
ensure safe handling and/or
transportation for subsequent
incineration or chemical treatment. EPA
is not restricting the use of this practice
for any waste in these D003
Subcategories.
BOAT TREATMENT STANDARDS FOR 0003
REACTIVE CYANIDES—261.23