Friday
                                        February 12, 1993
                                        Part VIII



                                        Environmental

                                        Protection  Agency

                                        40 CFR Part 261
                                        Exemption of Petroleum-Contaminated
                                        Media and Debris From Underground
                                        Storage Tanks From RCRA Hazardous
                                        Waste Requirements; Proposed Rule
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      8504
Federal Register / VoL •. 58,-No.. 28 /» Friday, February  12, 1993 / Proposed Rules
      ENVIRONMENTAL PROTECTION
      AGENCY

      40 CFR Part 261
      IFHL-4595-9]

      BIN2050-AD69

      Exemption of Petroleum-Contaminated
      Media and Debris From Underground
      Storage Tanks From RCRA Hazardous
      Waste Requirements: Proposed Rule

      AGENCY: Environmental Protectipn
      Agency,
      ACTION: Proposed rule.

      SUMMARY: The Environmental Protection
      Agency (EPA) is proposing to take final
      action on an issue deferred in the 1990
      hazardous waste Toxicity
      Characteristics (TC) rule under the
      Resource Conservation and Recovery
      Act (RCRA). The Agency proposes to
      exempt, from certain portions of EPA's
      hazardous waste regulations, petroleum-
      contaminated media and debris, such as
      soils and groundwater, that are
      generated from underground storage
      tank (UST) corrective actions that are
      subject to subtitle I of RCRA. The
      exemption would be limited to the 25
      newly listed organic chemicals under
      tho TC (i.e., Hazardous Waste Codes
      D018 through D043 only). After
      consideration of comments received in
      response to this proposed rule, EPA will
      publish a rule containing the Agency's
      final determination regarding the
      permanent regulatory status of UST
      petroleum-contaminated media and
      debris under RCRA.
      DATES: Written comments on this
      proposed rule must be submitted on or
      before April 13,1993.   ,
      ADDRESSES: Written comments on
      today's proposal should be addressed to
      the docket clerk at the following
      address: U.S. Environmental Protection
      Agency, RCRA Docket (OS-305), 401M
      Streat, SW., Washington, DC 20460. One
      original and  two copies of comments
      should bo sent and identified by
      regulatory docket reference number F-
      93-DPUP-FFFFF. The docket is open
      from 9 a.m. to 4 p.m., Monday through
      Friday, excluding Federal holidays.
      Docket materials may be reviewed by
      appointment by calling (202) 260-9327.
      Copies of docket materials may be made
      at a cost of $0.15 per page.
      FOR FURTHER INFORMATION CONTACT: For
      general information about this proposal,
      contact the RCRA/Superfund Hotline,
      Office of Solid Waste, U.S.
     Environmental Protection Agency
     Washington, DC 20460, (800) 424-9346
      (toll-free) or (703) 412-9810 (local). For
                       the hearing impaired, the number is
                       (800) 553-7672 (toll-free), or (703) 412-
                       3323 (local). For technical information
                       on this proposal, contact John
                       Heffelfinger in the EPA Office of
                       Underground Storage Tanks at (703)
                       308-8881. To obtain copies of the
                       reports or other materials referred to in
                       this proposal, contact the RCRA Docket
                       at the phone number or address listed
                       above.

                       SUPPLEMENTARY INFORMATION:
                       I. Background

                       A. Toxicity Characteristics Rule
                         The Toxicity Characteristics  (TC) rule
                       for identifying hazardous wastes was
                       promulgated by the Agency on March
                       29,1990 (55 FR11798), was amended
                       on June 29,1990 (55 FR 26986), and
                       became effective on September 25,1990.
                       The rule replaced the Extraction
                       Procedure (EP) leach test with the
                       Toxicity Characteristic Leaching
                       Procedure (TCLP), added 25 organic
                       chemicals to the list of toxic
                       constituents of concern, and established
                       regulatory levels for these organic
                       chemicals.
                         The overall effect of the TC rule was
                       to subject additional solid wastes to
                       regulatory control under the hazardous
                       waste provisions of subtitle C of RCRA..
                       Under this rule, a waste may be a
                       hazardous waste if any chemicals listed
                       in the rule, such as benzene, are present
                       in leachate from the waste (generated
                       from use of the TCLP) at or above the
                       specified regulatory levels. Management
                       of such hazardous waste is subject to
                       stringent RCRA subtitle C controls.
                       B. The UST Deferral
                         Among the wastes that could be TC
                       wastes are petroleum contaminated
                       media and debris. At the time of
                       promulgation of the final TC rule, the
                       Agency made a determination to
                       temporarily defer applicability  of the TC
                       rule to media and debris (e.g., soils and
                       groundwater) contaminated with
                       petroleum from underground storage
                       tanks (USTs) that are subject to the
                       corrective action requirements of
                       subtitle I of RCRA. 55 FR 11862 (March
                       29,1990), as amended 55 FR 26986
                       (June 29,1990). The deferral was
                       limited to the 25 newly listed organic
                       chemicals under the TC (i.e., Hazardous
                       Waste Codes D018 through D043 only).
                       See 40 CFR 261.4(b)(10).
                         The deferral was the result of several
                       factors. See 55 FR 11836 (March 29,
                       1990). Because the potential impact of
                       the TC on materials generated from UST
                       cleanups did not become apparent until
                       very late in the rulemaking process, at
                       the time of promulgation of the final TC
 rule, the Agency had little information
 regarding the full impact of the TC rule
 on UST cleanups, particularly regarding
 the amount of contaminated media that
 would become hazardous waste and the
 type of management feasible and
 appropriate for such waste. However,
 available information suggested that the
 impact of applying subtitle C to UST
 cleanups might be severe in terms of the
 administrative feasibility of both the
 subtitle C and subtitle I programs. A
 preliminary assessment indicated that
 the number of UST cleanup sites and
 the amount of media and debris at each
 site that would exhibit the toxicity
 characteristic could be extremely high,
 with EPA expecting hundreds  of
 thousands of UST releases to be
 identified in the next few years. The
 Agency believed that subjecting all, or
 even a portion, 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.
  In addition, EPA believed that
 imposition of the requirements could
 delay UST cleanups significantly,
 require an enormous new commitment
 of Federal and State resources, and
 undermine the State and local  focus of
 the UST program. All of these factors
 suggested that EPA needed additional
 time to determine with more certainty
 what the impacts of the TC would be on
 UST cleanups before subjecting such
 materials to hazardous waste
 requirements. In addition, EPA needed
 time to investigate whether regulatory
 changes could be made to RCRA subtitle
 C regulations to allow appropriate
 integration of the two programs. EPA
 also believed that the UST regulations
 governing cleanup at these sites would
 be adequate to protect human health
 and the environment in the interim,
 until a final determination was made
 regarding the regulation of UST wastes.
  In the preamble explaining the need
 for the deferral, EPA committed to
 undertaking several studies and
 meetings in order to make a final
 determination concerning the regulation
 of these UST wastes under the  subtitle
 C program. Since the temporary deferral
 was published on March 29,1990, EPA
 has conducted several studies and held
 meetings with interested members of the
 public regarding the temporary deferral
and the anticipated effects of regulating
UST petroleum-contaminated media
and debris as hazardous wastes under
subtitle C of RCRA. EPA recently
published a Notice of Data Availability
summarizing the  findings of these
studies and the results of the public
meetings. 55 FR 36866 (August 14,
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                   Federal Register  / Vol.  58,  No. 28  /  Friday,  February 12, 1993 / Proposed Rules
                                                                     8505
     1992). Comments received in response
     to the Notice of Data Availability will
     also be used by the Agency in making
     its final determination regarding the
     permanent regulatory status of UST
     petroleum-contaminated media and
     debris as hazardous waste under RCRA
     subtitle C.
     II. Explanation of Today's Proposal
       Today's action proposes to exempt
     contaminated media and debris, that are
     generated from petroleum UST
     corrective actions that are subject to
     subtitle I of RCRA, from certain portions
     of the RCRA Toxicity Characteristics
     rule. The exemption would be limited to
     the 25 newly listed organic chemicals
     under the TC rule (i.e., Hazardous Waste
     Codes D018 through D043 only).
     -  The proposed action would be
     accomplished by maintaining the
     language contained in the current
     temporary deferral for UST petroleum-
     contaminated media and debris, found
     at 40 CFR 261.4(b)(10). This deferral
     currently reads as follows:
     Section 261.4 Exclusions
     *****
      (b) Solid wastes which are not hazardous
     wastes. The following solid wastes are not
     hazardous wastes:
     *****
      (10) Petroleum-contaminated media and
     debris that fail the test for the Toxicity
     Characteristic of section 261.24 (Hazardous
     Waste Codes D018 through D043 only) and
     are subject to the corrective action
     regulations under part 280 of this chapter.
      If EPA issues the final determination
     as it is being proposed today, the
     current language of the deferral would
     remain unchanged. Each of the
     individual elements of the proposal is
     discussed in more detail below.

     A. Contaminated Media and Debris
      The term contaminated media
     includes naturally-occurring materials
     such as soil, groundwater, surface water,
     and air that have become contaminated
     with substances released from
     petroleum underground storage tanks.
      The term debris means solid material
     exceeding 60 mm (2.5 inch) particle size
     that is: (1) A manufactured object; or (2)
     plant or animal matter; or (3) natural
     geologic material. This term is defined
     by EPA at 40 CFR 268.2(g). See 57 FR
     37270 (Aug. 18, 1992). The definition of
     debris includes material that is plant or
     animal matter such as grass, trees, and
     stumps; or is natural geologic material
     such as rocks and boulders; or is a solid,
     man-made material such as concrete,
     buried tires, buried empty drums, as
     well as empty petroleum USTs and
     empty piping that are present at the site.
     Included in this term are the UST and
piping from which the petroleum
substance was released, provided they
are empty in accordance with EPA's
closure regulations for underground
storage tanks. 40 CFR 280.70(a) of these
regulations defines an UST system to be
empty when "no more than 2.5
centimeters (one inch) of residue, or 0.3
percent by weight of the total capacity
of the UST system, remain in the
system."
B. Petroleum UST Corrective Actions
  Under today's proposal, contaminated
media and debris are exempted if
"subject to the corrective action
regulations" under 40 CFR part 280.
EPA interprets this to include all media
and debris generated in response to
known or suspected releases from a
petroleum UST  system. The term
"petroleum UST system" is defined in
EPA's UST regulations at 40 CFR
280.12. Responses to releases from
petroleum UST  systems are covered by
EPA's UST regulations at 40 CFR part
280 under subpart E—Release
Reporting, Investigation, and
Confirmation, and subpart F—Release
Response and Corrective Action for UST
Systems Containing Petroleum and
Hazardous Substances.
  The proposed exemption also
includes contaminated media and
debris discovered as a result of routine
petroleum UST  closures, UST site
assessments, and UST replacements.
The rationale for this approach is that
the discovery of contamination when
performing these routine activities
requires reporting under EPA's UST
regulations, as the contamination
represents a known or suspected release
from an UST. See 40 CFR 280.50. Such
releases are subject to subparts E and F
of EPA's UST regulations, referenced
above.
C, Subtitle I of RCRA
  Today's proposal applies only to
contaminated media and debris from
petroleum USTs that are subject to the
corrective action regulations under
subtitle I of RCRA (40 CFR part 280.60-
280.67). Contaminated media and debris
from non-subtitle I regulated sources
(e.g., above ground tanks; farm and
residential motor fuel USTs of 1100 or
less gallons capacity) are not included
in the proposed  exemption. These
materials, however, are the subject of a
separate proposed rulemaking by the
Agency. This separate rulemaking is
discussed elsewhere in today's
preamble.
  USTs storing heating oil for
consumptive use on the premises where
stored are not regulated under subtitle I
and, thus, are not covered by the
proposed exemption. However,  •
contaminated media and debris
generated from residential heating oil
tanks are "household wastes" under 40
CFR 261.4(b)(l). Under EPA's subtitle C
regulations, household wastes are solid
wastes but are excluded from
consideration as hazardous wastes.
Thus, contaminated media and debris
from residential heating oil tanks are not
hazardous wastes under subtitle C of
RCRA.
D. Request for Comments
  EPA requests commenters to indicate
their support or opposition, with
supporting rationale, to the proposed
exemption for UST petroleum-
contaminated media and debris as
described in the preceding paragraphs.
In particular, EPA is interested in
comments addressing whether the scope
of the proposed exemption is
appropriate, or whether it should be
broadened or narrowed. EPA is also
interested in any analytical test data that
indicate the concentration of the TCLP
constituents in petroleum UST-
contaminated media and debris.  EPA
also requests comments on alternatives
to the exemption proposed today, which
are discussed below.
E. Other Options Considered
1. Expansion of the Exemption to all TC
Contaminants
  When the temporary deferral was
clarified in June, 1990, it was limited to
the 25 newly listed organic
contaminants under the 1990 TC rule.
The deferral does not apply to the
original 14 contaminants identified
under EPA's 1980 Extraction Procedure
(EP) toxicity characteristic rule. The
contaminants regulated under the EPTC
are arsenic, barium, cadmium,
chromium, lead, mercury, selenium,
and silver, as well as endrin, lihdane,
methoxychlor, toxaphene, 2,4-D, and
2,4,5-TP silvex. The deferral was limited
only to the new contaminants because
the issue of the relationship between
hazardous waste rules and UST
cleanups came to the Agency's attention
during the development of the TC
rulemaking, and was a result of the
regulation of new constituents under
that rule.
  Since the original  14 contaminants
were not part of the temporary deferral,
generators are currently obligated to
make a determination of whether the
petroleum-contaminated media and
debris would be hazardous for the
original 14 constituents. Generators are
allowed to make the determination
either by  subjecting the materials to the
TCLP, or  "applying knowledge of the
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       8506	Federal Register / Vol. 58, No.  28 / Friday, February  12, 1993 / Proposed Rules
      hazard characteristic of the waste in
      light of the materials or the processes
      used" (40 CFR 262.11(c)).
        EPA believes it may also be
      unnecessary to require a hazardous
      waste determination for the 14 EP
      contaminants. As discussed in the
      preamble to EPA's underground storage
      tank regulations on September 23,1988
      (53 FR 37189), information the Agency
      had at that time from several States
      indicated it was highly unlikely that
      UST petroleum-contaminated soils
      would exhibit the characteristic of EP
      toxicity, even for lead that may have
      resulted from releases of leaded
      gasoline. Further, with the phase-out of
      leaded gasoline, it would seem even less
      likely for contaminated media and
      debris resulting from more recent
      releases of gasoline to exhibit the
      Toxicity Characteristic for lead. Thus,
      inclusion of these contaminants in the
      exemption would appear to have no
      impact on protection of human health or
      the environment, and testing for these
      contaminants appears unnecessary.
        In addition, including these
      contaminants in the exemption will
      result in cost savings in the form of
      avoided TCLP sampling and analysis
      costs because owners and operators
      \vould no longer be required to
      determine whether petroleum
      contaminated media and debris exhibits
      the Toxicity Characteristic. If UST
      owners make this determination
      through TCLP testing of the materials,
      rather than applying some form of
      "knowledge" about them, laboratory
      analytical costs can  range from a few
      hundred to more than a thousand
      dollars per sample. Since several
      samples of the contaminated media and
      debris would likely  be necessary in
      order to adequately characterize the
      contamination at a particular site, the
      savings in sampling and analysis costs
      could amount to several thousand
      dollars per facility. These cost savings
      could bo used to pay for proper
      management of the contaminated media
      and debris, rather than for unnecessary
      sampling and laboratory analyses.
       Therefore, the Agency is interested hi
      obtaining comments from the public
      regarding whether the final rule for the
      exemption should include these
      contaminants. EPA is particularly
      interested in commenters* rationale for
      Including these contaminants within the
      exemption, and hi any supporting data
      that indicate the concentration of these
      contaminants in petroleum UST-
      contaminated media and debris.
 2. Expansion of the Exemption to Other
 Hazardous Waste Characteristics
   EPA considered, but has tentatively
 rejected, proposing to expand the
 exemption for UST petroleum-
 contaminated media and debris to the
 other three characteristics of hazardous
 waste, in addition to the Toxicity
 Characteristic. These three
 characteristics are Ignitability,
 Corrosivity, and Reactivity. See 40 CFR
 260.20-260.23. EPA generally believes
 that UST petroleum-contaminated
 media and debris are unlikely to exhibit
 these characteristics and, thus, would be
 unlikely to be regulated as hazardous
 waste because of these characteristics.
 However, in the event that UST
 petroleum-contaminated media and
 debris were to exhibit one of these
 characteristics, improper management
 of the media or debris could pose severe
 acute human health or environmental
 impacts. The Agency believes that the
 potential for such acute impacts
 warrants management of contaminated
 media and debris as hazardous waste, in
 the unlikely event that these materials.
 exhibit one of these three
 characteristics. EPA is interested in
 public comments on this aspect of
 today's proposal.

 3. Subtitle I Management Standards for
 Contaminated Media and Debris
   Another option considered by EPA hi
 lieu of regulation under subtitle C was
 to develop Federal management
 standards under subtitle I for the
 treatment and disposal of UST
 petroleum-contaminated media and
 debris. Such management standards
 may provide a greater degree of
 certainty regarding the ultimate
 disposition of these  materials than the
 current subtitle I regulatory structure,
 while avoiding the problems associated
 with regulating these materials under
 subtitle C. This approach, however,
 would reduce the flexibility that the
 States currently have in terms of
 establishing technology requirements,
 cleanup standards, and oversight
 processes that they consider adequate
 and appropriate for management of
 these  materials.
  This approach would also tend to
 inhibit the development of innovative
 technologies for remediation of these
 materials. The Agency is currently
 promoting the use of innovative
 technologies for cleanups and the
 streamlining of State corrective action
procedures, in an effort to improve the
effectiveness and efficiency of corrective
actions. Establishing Federal
management standards for UST
petroleum-contaminated media and
 debris could limit the effectiveness of
 these efforts.
   Establishing new regulations under
 subtitle I would likely require States to
 enact new legislation or regulations to
 be "no less stringent" than the Federal
 requirements in order to obtain approval
 of their State UST program to operate in
 lieu of the Federal program. This could
 cause administrative problems for those
 States that have already received
 approval of their State UST program
 from EPA, as well as delay those that are
 far along in the approval process.
   EPA is interested hi comments on this
 issue, particularly regarding the scope
 and content of potential Federal
 management standards for UST
 petroleum-contaminated media and
 debris under subtitle I. EPA is interested
 hi comments regarding the usefulness
 and desirability of such Federal
 standards, in view of existing State  UST
 corrective action and solid waste
 management programs.

 m. Basis for Today's Proposal

 A. Purpose and Legal Basis
   The primary purpose of today's action
 is to allow corrective action, including
 management of petroleum-contaminated
 media and debris, to occur under the
 authority of subtitle I of RCRA rather
 than under overlapping requirements of
 both subtitle C and subtitle I. Subtitle I
 contains comprehensive requirements
 for the reporting and cleanup of soil and
 groundwater contamination from   • .
 petroleum USTs. Further, subtitle I
 requires that treatment or disposal of
 soils be conducted in compliance with
 applicable State and local requirements.
 See 40 CFR 280.62.
   Subtitle I requirements are primarily
 implemented by each of the individual
 States and Territories, under provisions
 of subtitle I State Program Approval
 regulations, or under Memoranda of
 Agreement with EPA in States whose   •
 programs have not yet been approved by
 EPA. In the case  of an approved State,
 EPA has deemed the State's UST
 program to be "no less stringent" than
 the Federal subtitle I program. In a State
 operating under a Memorandum of
 Agreement with EPA, the State is
 implementing the subtitle I regulations
 on behalf of EPA. EPA retains the
 authority to implement the
 requirements, where necessary, in
 unapproved States. In either case, the
 UST program is protective of human
health and the environment, despite
 differences in specific corrective action
procedures or approaches that may exist
between States.
  EPA believes that States are hi the
best position to oversee management of
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                 Federal Register / Vol. 58, No.  28 / Friday, February  12,  1993 / Proposed Rules
                                                                    8507
   the approximately 50,000 new UST
   releases identified each. year. As
   discussed below, EPA studies confirm
   that State agencies are currently
   managing UST petroleum-contaminated
   media and debris in a manner that
   protects human health and the
   environment. Thus, it is unnecessary to
   subject these materials to management
   as hazardous wastes under subtitle C of
   RCRA.
     Section 1004 of RCRA defines a
   "hazardous waste" as a solid waste
   which may pose a substantial threat
   "when improperly * *  * managed." In
   addition, section 3001 of RCRA
   authorizes EPA to determine whether
   subtitle C regulation is appropriate in
   determining whether to designate a
   waste as "hazardous." EPA thus may
   determine that subtitle C regulation is
   not appropriate because such wastes are
   not "hazardous" when properly
   managed and, based on existing.
   regulatory programs, would not be
   mismanaged. Under this approach,
   regulation of UST petroleum-
   contaminated media and debris under
   subtitle C is not necessary to protect
   human health and the environment, due
   to the presence of the Federal subtitle I
   regulations for underground storage
   tanks and the UST programs that are
   active in each of the States.
      EPA is also concerned about the
   implementation and risk impacts
    associated with subjecting some or all
    aspects of petroleum UST cleanups sto
    subtitle C. As discussed in more detail
    below, EPA believes that the findings of
    its studies and the information received
    during the course of meetings with
    interested members of the public
    support today's proposal for a final
    determination to make permanent the
    current temporary deferral for UST
    petroleum-contaminated media and
    debris.
    B. EPA's Studies
      The findings of the Agency's studies
    corroborate the preliminary assessment
    that EPA made at the time of
    promulgation of the temporary deferral.
    Specifically, the findings of EPA's
    studies indicate that removing the TC
    deferral would significantly affect UST
    cleanup procedures, delay remedial
    actions, and increase soil remediation
    costs. Further, delays in site
    remediation caused by compliance with
     subtitle C requirements could increase
     health and environmental risks prior to
     cleanup.
       In addition to findings concerning the
     impacts of removing the deferral, these
     studies also indicate that many States
     have programs in place to adequately
     regulate the management of UST
petroleum contaminated media and
debris. The vast majority of these State
programs address in some manner the
entire cycle of UST petroleum
contaminated soils and groundwater
management, from initial
characterization through storage and
ultimate treatment or disposal.

1. Technical Study
  The Agency has made available for
public comment a draft report titled "TC
Study of Petroleum UST Contaminated
Media and Debris." This report is
organized as follows:
  • Estimates of the amounts of UST
petroleum contaminated soils that might
be expected to exhibit the hazardous
waste characteristic of toxicity if
subjected to the TCLP test,
  • Impacts on hazardous waste
capacity nationwide if these materials
required management as a hazardous
waste,
  • State management  practices for
petroleum contaminated soils from
USTs,
  « Overview of technologies currently
used for management of petroleum  K
 contaminated soils and groundwater,
 and
   • Impacts on the RCRA subtitle I and
 C programs of removing the temporary
 deferral.
 2. Impacts Study
   The Agency has also made available
 for public comment a draft report titled
 "The Impacts of Removing the TCLP
 Deferral for Petroleum-Contaminated
 Media at Underground Storage Tank
 Sites." This report is organized as
 follows:
   • Procedural impacts of removing the
 deferral with regard to changes that
 would be required in cleanup
 procedures, technologies and the pace
 of UST corrective actions,
   •  Cost impacts of removing the
 deferral, both to the regulated
 community, as well as EPA and States,
 and
   •  Preliminary assessment of health
 risk impacts associated with removing
  the temporary deferral.

  3. Study Findings
   As stated previously, EPA believes
  that these study findings support a final
  determination to make permanent the
  current temporary deferral for UST
  petroleum contaminated media and
  debris. The primary study findings that
  serve as a basis for making the deferral
  permanent are summarized below.
    a. Procedural impacts.  Removal of
  the  deferral would result in substantial
  delays in UST cleanups due to the
  necessity of issuing a  RCRA permit, by
EPA or authorized States, for cleanups
that involve treatment of TC-hazardous
contaminated media on site (other than
treatment that occurs on site in tanks in
less than 90 days, or other units exempt
from permitting). EPA's studies estimate
that approximately 10% to 20% of the
soil contaminated at a petroleum UST
release may exhibit the Toxicity
Characteristic. A significant
consideration, however, is that this
percentage contamination may exist at
the majority of UST release sites, which
currently average about 50,000 new
release sites identified each year. EPA's
studies indicate that on-site treatment of
soils currently occurs at at least 20% of
the UST soil remediation sites,  with the
trend increasing toward additional on-
site treatment of soils. The situation
with regard to groundwater
contamination is also an important
consideration. Virtually all treatment of
petroleum-contaminated groundwater at
UST release sites is performed on site.
Although some of the groundwater
treatment techniques may be exempt
 from RCRA permitting requirements,
 others would not be exempt.
   Delays in UST cleanups would occur,
 in part, due to the tremendous  increase
 in the number of permit applications for
 UST cleanups that would likely have to
 be handled with current Federal or State
 RCRA subtitle C permitting staff
 resources. It takes approximately one to
 four years, at current workload levels, to
 issue a RCRA subtitle C permit. Further,
 in States riot yet authorized under
 subtitle C for the TC portion of the
 regulatory program, EPA alone would be
 responsible for issuance of permits. The
 substantial delays discussed above
 would allow subsurface contamination
 to continue and spread, increasing the
 costs of remediation, and increasing the
 potential for ground water
 contamination and for additional
 receptors to be affected.
    Removal of the deferral would result
 in significant changes in the UST
 corrective action process. The current
 subtitle I remedial decision-making
 process is relatively simple and
 straightforward, compared to the more
 complex process associated with
 managing contaminated media and
  debris as hazardous waste. One example
  of the increased complexity of
  implementing remedial measures for
  hazardous waste would be the need to
  evaluate on-site versus off-site options
  for the management of the material. This
  would include identifying RCRA
  permitted treatment, storage, or disposal
  (TSD) facilities that would accept the
  waste, balancing transportation and off-
  site disposal costs with on-site
  management costs, and formal
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Federal Register / Vol. 58, No.  28 / Friday, February 12, 1993 / Proposed Rules
      consideration of the risks and benefits of
      on-site versus off-site management.
        If the TC deferral were eliminated, the
      flexibility EPA currently allows States
      in the choice of cleanup technologies
      would be significantly reduced. For
      example, based on the current subtitle C
      regulations, UST owners and operators
      would likely be limited, in practice, to
      a choice of three cleanup options: (1)
      Excavate and send contaminated soil
      off-site to RCRA subtitle C permitted
      hazardous waste treatment, storage, or
      disposal facilities, (2) treat soils on-site
      in loss than 90 days in a tank, in
      accordance with subtitle C tank
      generator and accumulation regulations,
      or (3) become a permitted TSD facility,
      thereby allowing on-site treatment of the
      petroleum contaminated media and
      debris.
       , With regard to the above management
      scenarios under subtitle C, the Agency
      is not aware of any currently used
      cleanup technologies that would
      involve the treatment of large volumes
      of petroleum-contaminated soils on site
      in tanks for less than 90 days. Thus, this
      appears to be an unlikely management
      alternative), As for obtaining a RCRA
      TSD permit, two States have estimated
      owner/operator administrative costs to
      obtain a TSD permit for petroleum
      release sites ranging from $21,000 to
      $80,000. Because of the delays and
      relatively high cost of a subtitle C TSD
      permit, which would be required for
      many on-site remediations of hazardous
      waste, petroleum contaminated soil
      management and disposal is more likely
      to be conducted off-site if it were
      considered hazardous waste. Since
      disposal in a subtitle C landfill is
      generally less  expensive than subtitle C
      incineration, the Agency believes that
      for the majority of sites, the practical
      result of regulating UST petroleum-
      contaminated media and debris as
      hazardous waste would be the
      excavation and disposal of these
      materials  in subtitle C landfills. This
      option, however, may be limited in
      time. When the TC land disposal
      restrictions are promulgated,
      incineration or other forms of treatment
      would likely be required for these
      materials prior to disposal, if they were
      considered hazardous waste.
        On the contrary, the flexibility
      afforded under subtitle I for managing
      UST petroleum-contaminated media
      and debris as non-hazardous allows for
      the use of a much broader spectrum of
      management options for these materials,
      such as aeration, low temperature
      thermal treatment, soil vapor extraction,
      and bioremediation. While there is
      currently variation between states in the
      Subtitle I soil technologies commonly
                                                     •on
 used, the majority currently rely
 excavation and relatively simple
 treatment and disposal methods. The
 trend during the past several years,
 however, and EPA's preferred approach
 to management of these materials, is to
 treat them on site, in situ, i.e., without
 excavation or transportation off-site.
   Since the Agency believes that, in
 most cases, the practical result of
 regulating UST petroleum-contaminated
 media and debris as hazardous waste at
 this time would be the excavation and
 disposal of these materials in subtitle C
 landfills, this would adversely affect the
 Agency's current efforts to promote the
 use of innovative technologies for
 treatment of these materials, particularly
 those that can be used in situ, such as
 bioremediation and soil vapor
 extraction. In addition, EPA estimates
 that landfilling of these materials at
 subtitle C facilities would increase the
 amount of waste going to these facilities
 by 8 to  20 percent annually. Since the
 Agency's studies confirm that these
 materials are currently being managed
 under subtitle I State programs that are
 protective of human health and the
 environment, the Agency believes that it
 would be more prudent to reserve the
 nation's limited hazardous waste
 landfill capacity for those wastes that
 might otherwise be mismanaged, or for
 which no equivalent subtitle I-type
 program exists.
   Although it is difficult to estimate the
 precise  pace at which UST remediations
 would proceed when the contaminated
 media and debris is considered
 hazardous waste, EPA's studies indicate
 that they would take substantially
 longer than cleanups currently managed
 solely under subtitle I. Several factors
 may contribute to the increased
 duration of cleanups, such as more
 extensive sampling and analysis
 requirements, and increased complexity
 of corrective action procedural
 requirements, as described previously.
   More  important, however, than the
 increased length of time needed to
 perform the actual cleanup, are the
 delays that would occur prior'to the
 beginning of corrective action,
 particularly if the site requires
 permitting. For example, permit
 standards and conditions are
 established on a site-specific basis
 under subtitle C. In-situ soil vapor
 extraction or bioremediation are
 treatment approaches with which the
 RCRA program has little permitting
 experience to date, so uncertainties exist
as to the most appropriate permit
conditions for such cleanups. This
uncertainty is likely to result in further
delays in issuing of permits for such
sites, as  w.ell as the imposition of
 additional permit conditions that are
 beyond the conditions typically
 imposed by States under subtitle I.
   In addition to the permitting
 requirements for the "regulated unit,"
 i.e., the remediation unit where TC-
 hazardous waste is treated, stored, or
 disposed at the UST site, any existing
 "solid waste management units," or
 SWMUs, at the facility would have to be
 cleaned up in accordance with RCRA
 section 3004(u) corrective action
 authorities and EPA's corrective action
 guidance for permitted hazardous waste
 TSD facilities. SWMUs at a typical UST
 facility might include a used oil tank, a
 trash disposal area, or an old drum
 storage area, but include virtually any
 portion of the property at which solid
 waste has ever been managed.  Cleanup
 for these units under a RCRA TSD
 permit would generally be to risk-based
 levels, as determined on a site-specific
 basis. See 55 FR 30798 (July 27,1990).
 As part of the permit conditions, UST
 owners or operators would be required
 to undertake a RCRA Facility
 Assessment, a RCRA Facility
 Investigation, a Corrective Measures
 Study and, finally, Corrective Measures
 Implementation for any SWMUs at the
 site. In addition, public participation
 requirements apply prior to issuance of
 each RCRA permit. This includes local
 notice of the proposed permit action
 and providing the public an opportunity
 for public hearings on the permit. These
 additional requirements add to delays in
 the subtitle C permitting process and are
 likely to severely discourage UST
 owners from undertaking on-site, in-situ
 cleanups. This result has also been
 corroborated by an Agency study on
 Corrective Action Management Units
 (CAMUs). See 57 FR 48195 (October 22,
 1992). The study indicates that applying
 the hazardous waste land disposal
 restrictions to remediation wastes
 increases risks by causing less
 treatment, and less on-site treatment in
 particular, thereby increasing risks from
 transport of hazardous waste and
 leaving wastes in place without
 treatment;
  An important consideration for UST
 cleanups that would require subtitle C
 permitting is that cleanup cannot begin
 until the permit is issued. The delays-
 associated with permit issuance will
 allow contamination to continue
 unabated, increasing the costs of
 remediation and increasing the potential
 for groundwater contamination and for
 additional receptors to be affected.
  b. Risk impacts. EPA's studies
 considered human health risk impacts
that potentially would result if the UST
petroleum-contaminated media deferral-
were removed. The studies evaluated
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                    Federal Register / Vol. 58, No. 28 / Friday, February  12,  1993 / Proposed Rules
                                                                       8509
      three components of health risk. The
      first component is interim risk, which is
      the health risk present at an UST site
      prior to remediation, including drinking
      water risks, and risks such as fire and
      explosions, and inhalation of vapors.
      Interim risk would be expected to rise
      significantly without the exemption,
      since permitting delays prior to
      remediation would allow increased
      migration of petroleum contaminants,
      thereby increasing exposure potentials
      for populations near the site.
        EPA also evaluated a second
      component of risk, known as residual
      risk. Residual risk is the health risk
      remaining at the site following soil and
      groundwater remediation. EPA's studies
      indicate that residual risk would likely
      remained unchanged, i.e., neither
      increased nor decreased, by removal of
      the deferral and regulation of UST
      petroleum-contaminated media and
      debris as hazardous waste. This is due
      to the fact that the Toxicity
      Characteristic is not relevant to residual
      risk, because it is not a cleanup
      standard. Rather, the TC and associated
      subtitle C regulations impose
      requirements on how the waste
      generated from a cleanup can be
      managed. The soil and groundwater
      cleanup standards for the UST portion
      of the remediation is likely to be
      identical either with or without the
      exemption being proposed today.
       The remaining component of risk, the
      treatment/disposal risk, relates to the
      exposure potential associated with
      treatment or disposal of contaminated
      soil and groundwater. The effect of
      removing the deferral on  this element of
      risk is ambiguous. Different subtitle I
      and subtitle C technologies imply
      increased exposure potential, while
      others imply decreased potential. For
      example, in general, leak protection and
      subsurface monitoring at subtitle C
      landfills is generally superior to that at
      subtitle D landfills, where UST
    .  petroleum-contaminated  soils may be  .
      disposed of in certain States. Thus,
      health risk potential is likely reduced by
      disposal in a subtitle C landfill versus
      subtitle D. In other cases, however,
      thermal treatment of subtitle I soils
      would provide more rapid contaminant
      destruction,than subtitle C landfilling.
      Under this scenario, this type of
      treatment would likely pose less risk
      than subtitle C disposal.
       A further risk consideration involves
      the transport of contaminated soils.
      When soils are hauled over long
      distances, as would more likely be the
      case if they required management as
      hazardous waste and were excavated for
      off-site landfilling or incineration, the
      potential for accidental releases of
 contaminants is increased. Many States
 lack commercial subtitle C capacity to
 manage these materials, so transport
 over long distances is likely. In contrast,
 subtitle I treatment often occurs on site,
 as indicated in EPA's studies. Off-site
 treatment and disposal under subtitle I
 is typically accomplished within the
 State, resulting in far less hauling
 distances for the contaminated soils
 and, thus, less risk due to
 transportation.
  c. Cost Impacts.  EPA's study findings
 indicate that per-site remediation costs
 under subtitle C would be substantially
 higher than those currently incurred
 under subtitle I. As discussed
 previously, as a practical matter, the
 techniques that would likely be used in
 managing UST petroleum-contaminated
 media and debris as hazardous waste
 would be more limited than those
 currently used under subtitle I. For the
 majority of cases, it is likely that
 excavation followed by subtitle C
 landfilling or incineration would occur.
 For sites involving soil management
 only, the studies indicate that typical
 subtitle C costs may range from two to
 15 times or more higher than the costs
 of cleanup under subtitle I. The primary
 source of this increase is the relative
 expense of the likely subtitle C soil
 management approaches compared to
 those currently used  under subtitle I.
 The broad range of the increase is
 dependent upon the subtitle C approach
 selected by the UST owner or
 necessitated by site conditions.
  For example, unit costs for subtitle I
 thermal treatment of soils in one State
 average $55 per cubic yard, compared to
 $1060 for subtitle C incineration and
 $510 for subtitle C landfills. Assuming
 management of 150 cubic yards of soil,
 subtitle I costs would be $8250,
 compared to $76,500 for subtitle C
 landfilling and $159,000 for subtitle C   .
 incineration.
 :.'- As a direct result of this increase in
 per-site cleanup costs, the removal of
 the deferral would result in significant
 nationwide increases in annual.UST
 remediation costs. The range of possible
 subtitle C management approaches and
 soil and groundwater remediation.
technologies makes it difficult to predict
the size of the increases. However,
based on reasonable assumptions about
the likely mix of technologies selected,
EPA's studies indicate national cost
increases may range from $1.9 billion to
$4.0 billion in each of the first five years
following removal of the deferral. These
estimates represent an 81 percent to 108
percent increase over current subtitle I
projected cleanup costs.
  Based on the discussion of risk
impacts previously, such cost increases
 are unnecessary in achieving adequate
 protection of human health and the
 environment. Further, if hazardous
 waste permitting of UST cleanups
 occurred, there would likely be a   ;
 decrease in the protection currently
 provided under subtitle I UST programs,
 but at an increased cost.

 C. Public meetings
  In the preamble to the 1990 TC rule,
 EPA also stated its intention to convene
 a public forum to discuss the issues
 associated with regulating UST
 petroleum-contaminated soils and
 debris under subtitle C of RCRA. To
 fulfill this commitment, in September
 and December, 1991, EPA convened
 several meetings with various interested
 parties (including representatives from
 the States, Congressional staff,
 environmental groups and the waste
 treatment and waste generating
 industries) to discuss issues related to
 the cleanup of petroleum contamination
 from UST as well as non-UST sources,
 and the potential impacts of the TC rule
 on these cleanups.
  The thirteen States attending these
 meetings expressed significant concern
 about the adverse environmental
 impacts resulting from the application
 of the TC rule to petroleum  UST
 releases. The State representatives
 indicate'd that regulation of petroleum
 contaminated media and debris as  '
 hazardous waste would significantly
 increase the cost of cleanup of these
 releases, substantially delay cleanup,
 and in some cases (by delaying cleanup)
 negatively impact human health and the
 environment.
  A number of States have funds that
 provide a significant portion of the
 cleanup costs for petroleum UST
 releases. According to these States, if
 petroleum contaminated media and
 debris are regulated as hazardous
 wastes,  the resulting dramatic increases
 in costs of waste management would
 significantly impair the ability of the
 State to pay for future cleanups. Further,
 if there is no guarantee that payment
 will be forthcoming, several States
believe that many responsible parties
and their cleanup contractors will be
much less willing to report and respond
promptly to releases. The net result,
according to these States, will be that
fewer sites will be remediated and
remediations will be delayed, thus
increasing the migration of
contamination off-site, and in turn
negatively impacting human health and
the environment.
  In the view of many States, the delays
associated with RCRA subtitle C
management would allow for
volatilization and migration of certain
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      8510	Federal Register / Vol. 58, No. 28 / Friday, February 12, 1993  / Proposed Rules
      TC constituents, such as benzene, prior
      to cleanup. These States point to RCRA
      testing and permitting as significant
      sources of delay. In addition, States
      cautioned EPA to recognize that,
      because of the high costs associated
      with subtitle C management, there
      would be a significant disincentive to
     , promptly report and undertake
      corrective action for petroleum releases.
      Thoy explained that UST owners may
      instead purposely allow the waste to
      volatilize until it no longer exhibits the
      toxicity characteristic, thus rendering it
      non-hazardous.
        Groups representing the waste
      generating industries (e.g., petroleum
      and petrochemical industries) at the
      meetings generally agreed with the
      views being expressed by the States,
      although several stated that the
      problems associated with applying
      subtitle C standards to remediations
      wore not unique to petroleum
      contaminated media.
        Environmental group representatives
      acknowledged the importance of these
      problems, but saw the issue as similar
      to other claims that regulations deter
      effective corrective actions. The
      environmental group representatives
      agreed on the merits of streamlining the
      subtitle C administrative processes and
      procedures (e.g., RCRA subtitle C
      permitting, as discussed later in this
      notice), but felt that regulatory control
      was necessary to ensure environmental
      safety. The environmental group
      representatives also argued that the
      important benefits of a RCRA permit,
      particularly public involvement and
      facility-wide corrective action, would be
      lost if EPA adopted the approach
      suggested by the States, i.e., making the
      UST deferral permanent.
        Certain representatives of the
      hazardous waste treatment industry
      expressed strong concerns with
      exemption from the TC rule as the
      mechanism for solving the
      implementation problems posed by
      subtitle C regulation of petroleum
      contaminated media and debris.
      According to these representatives, EPA
      should consider streamlining the RCRA
      permitting process for the cleanup and
      disposal of petroleum contaminated
      media  and debris. They specifically
      suggested that EPA consider issuing
      pormits-by-rule for petroleum
      contaminated media and debris, as well
      as for other cleanup wastes. They also
      expressed concern that the UST deferral
      effectively exempts petroleum
      contaminated media and debris from the
      RCRA technical standards, in particular
      tha land disposal restrictions. Other
      representatives of the waste treatment
      industry however, supported the
 deferral and favored expanding it to
 other cleanup wastes.
   A complete summary of these
 meetings is hi the docket for this
 rulemaking. The various viewpoints
 expressed in these meetings will be
 considered as part of EPA's final
 decisionmaking concerning the deferral.
 IV. Regulatory Alternatives Under
 Subtitle C
   The studies indicate that subjecting
 petroleum  UST cleanups to the full
 range of subtitle C regulations would
 have significant adverse impacts.
 However, in the context of other
 previous rulemakings, EPA has explored
 the concept of alternative, ostensibly
 more streamlined, types of RCRA
 regulatory approaches that could be
 used to expedite cleanups. Some of
 these alternatives are discussed below.
 EPA is interested in comments from the
 public on the efficacy of using these
 approaches in dealing with UST
 petroleum-contaminated media and
 debris under subtitle C of RCRA as an
 alternative to the exemption being
 proposed today.
   One alternative is reflected in the
 proposed rulemaking for mobile
 treatment units (52 FR 20914, June 3,
 1987).  Thermal treatment of UST
 petroleum contaminated soilsr often in
 mobile thermal treatment units, is an
 innovative  soil treatment technology
 that is  increasing in use. The primary
 legal impediments to obtaining this type
 of "streamlined" permit for UST
 corrective actions under subtitle C are
 the need to provide for site specific
 public participation (as required under
 RCRA  7004), and the requirement to
 address facility-wide corrective action
 (under RCRA 3004(u)). Given that any
 treatment permit would have to address
 these statutory requirements, and that
 doing so would require a considerable
 time and resource commitment on the
 part of the issuing government
 agency(s), as well as the permittee, it
 may be that creating this type of permit
 for UST petroleum cleanup situations
 would  actually have little
 "streamlining" effect.
  Another approach is the use of
 emergency permits under Subtitle C of
 RCRA as an alternative to full subtitle C
 permitting. Emergency permits under 40
 CFR 270.61 could be used hi some
 situations involving petroleum UST
releases. The problem is that these
permits are of such short duration (90
 days) that they would not be useful for
 extended cleanup operations, or for sites
where cleanup is not being conducted
hi response to an actual "emergency"
situation. Of the 112,000 UST cleanups
initiated that have been reported to EPA
 by the States, only 5900 were
 categorized as emergency responses.
   The concept of permits-by-rule has
 been considered as a mechanism that
 could alleviate the administrative
 impacts of individually permitting
 petroleum UST cleanups under subtitle
 C, while maintaining the substantive
 controls and standards (including the
 land disposal restrictions) provided
 under Subtitle C. However, as noted
 above, Section 7004(b)(2) of RCRA
 specifies that permits issued under
 RCRA for hazardous waste facilities
 must undergo a local hearing process.
 Thus, the utility of "permits-by-rule"
 may be limited under RCRA. See NRDC
 v. EPA, 907 F.2d 1146 (DC Cir. 1990)
 (remanding a hazardous waste permit-
 by-rule).
   Even if the administrative problems
 associated with issuing permits for
 petroleum UST cleanups activities
 could be resolved, additional problems
 of regulating these  cleanups under
 subtitle C remain. For example, UST
 owners or operators would have to
 register as a hazardous waste generator
 and obtain a generator identification
 number if they are generating soils or
 groundwater that exhibit the toxicity
 characteristic. The  thousands of
 facilities each year that may be involved
 in such transactions would impose
 additional burdens on the issuing
 agency, and likely add to delays in the
 cleanup process. In addition, generators
 of hazardous waste are required to
 prepare and submit to EPA a biennial
 report of their hazardous waste
 generation activities, resulting in an
 increased paperwork burden to the
 regulated community, and additional
 administrative costs to EPA to process
 such reports.
  EPA requests comment on the legal
 and technical defensibility of the above
 regulatory alternatives for regulation of
 these materials under RCRA subtitle C.
 EPA is concerned that some of the
 alternatives either may present legal
 concerns or fail to provide sufficient
 flexibility to remedy the environmental
 problems caused by regulating these
 materials as hazardous waste. EPA also
 requests suggestions concerning other
 changes to the subtitle C regulations that
 will allow EPA to regulate these
 materials under subtitle C while at the
 same time providing the flexibility to
 avoid the counterproductive impacts of
 subtitle C regulation of UST petroleum-
 contaminated media and debris
 discussed previously. EPA is also asking
 for comment on these and other
regulatory alternatives in a related
rulemaking concerning non-UST
petroleum contaminated media and
debris.
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                                                                     8511
    V. Process for the Final Determination
      EPA will review and evaluate the
    public comments on the studies, public
    meetings, and this proposed rule as part
    of its decisionmaking concerning the
    regulatory status of UST petroleum-
    contaminated media and debris.
    Following review of all the public
    comments submitted on these notices,
    EPA will publish in the Federal
    Register its final determination
    regarding the regulatory status of UST
    petroleum-contaminated media and
    debris.
    VI. Relationship to Non-UST
    Petroleum-Contaminated Media and
    Debris
      In a separate action (57 FR 61542,
    December 24,1992) the Agency has
    proposed suspension of the TC rule for
    the 25 newly listed organic
    contaminants for three years for
    environmental media and debris
    contaminated by petroleum products  -
    released from sources other than RCRA
    subtitle I regulated USTs. This
    suspension has been requested by
    several States. During the suspension
    period, the Agency would collect
    additional data, perform additional
    analyses, and explore other
    administrative and legal mechanisms to
    better tailor RCRA regulatory
    requirements to unique issues
    associated with remediation of non-UST
    petroleum releases.  ,
      Persons who would like to submit
    comments to EPA regarding the separate
    action for media and debris
    contaminated by non-UST releases must
    do so by submitting comments
    specifically addressing that action, to
    the appropriate RCRA docket.
     . .The Agency believes it is appropriate
    to examine the application of the TC
    rule to petroleum-contaminated media
    and debris from USTs and non-UST
    sources separately. Programs that
    regulate USTs and,non-UST sources of
    petroleum contaminated media and
    debris can be distinct, with their own
    regulatory and administrative
    structures. Hence, the impacts of the TC
    rule on UST and non-UST cleanups can
    differ. For this reason, the ultimate
    determinations as to how to regulate
    UST  and non-UST petroleum
    contaminated media and debris could
    be different.
       Different exemptions, however, for
     very  similar or identical types of waste,
     may be confusing to the regulated
     community and may pose challenges for
     the enforcement program. EPA is
     interested in obtaining comment from
     the public regarding whether and to
     what extent these two distinct
exemptions should be made consistent
or identical. Commenters may want to
focus their attention on four differences
in the non-UST proposal and today's
proposal, discussed below.
  First, the exemption in the non-UST
proposal is limited to petroleum-
contaminated media and debris
generated at sites that are the subject of
a site-specific enforcement order or
other written approval from the State.
The Agency believes a similar provision
is unnecessary in today's proposal, due
to the existence of the Federal corrective
action regulations for USTs under
subtitle I of RCRA, and the existence of
active UST regulatory programs in each
State that provide oversight of UST
corrective action activities.
  Second, the non-UST proposal limits
the exemption to media and debris that
are contaminated solely with petroleum
product. The Agency believes a similar
provision is unnecessary in today's
proposal. Subtitle I of RCRA contains a
well-defined universe  of "petroleum
UST systems" to which the exemption
would apply. These petroleum UST
systems are subject to the Federal UST
corrective action regulations and the
State programs discussed above,
whether they contain petroleum product
only, or other petroleum substances,
such as used oil, in certain
circumstances.
  Third, although not  a part of the
preferred option, the non-UST proposal
solicits comment on whether to limit
that exemption to releases of less than
a specified size, e.g., less than 10,000
gallons of released product. Larger spills
might be subject to full subtitle C
controls. While this provision may be
^appropriate for above ground spills
where the quantity of released product
can be more easily estimated, the
Agency believes such a provision is
unsuitable for releases from
underground storage tanks, because it
would be difficult, if not impossible, to
ascertain, the amount of material that
had been released into the subsurface
environment prior to the initiation of
cleanup.
   Fourth, both proposals limit the
exemption to the  25 newly h'sted TC
constituents. However, the non-UST
proposal solicits comment on further
limiting the scope of the non-UST
suspension only to those TC
constituents which are known to be
indigenous to petroleum product. The
Agency is considering three
 contaminants in this regard under the
 non-UST rule—benzene, cresols, and
 methyl ethyl ketone. The Agency
believes such a limitation is
 unnecessary in today's proposal,
 however, because contaminated media
and debris is exempt only if it is
generated from a subtitle I petroleum-
UST system, which is well defined. See
40 CFR part 280.12. For example, a
petroleum UST to which hazardous
waste had been added would no longer
be a subtitle I petroleum UST system
(rather, it would be subject to subtitle C
regulations). Thus, media and debris
contaminated by releases from such a
tank would not be exempt under today's
proposal.
VH. Effect on Subtitle C State
Authorization
  Since today's proposal will, when
finalized, make permanent the existing
temporary exemption already contained
in EPA's hazardous waste regulations,
there would be no impact on State
subtitle C hazardous waste programs,
whether authorized by EPA for the TC
or not. EPA did not require States to
adopt the UST temporary deferral, nor
would they be required to adopt the
exemption being proposed today, when
final, since this provision is less
stringent than subjecting UST
petroleumicontaminated media and
debris to the full requirements of the TC
rule.
VHI. Regulatory Requirements

A. Regulatory Impact Analysis
   Executive Order 12291 (46 FR 13193)
requires that regulatory agencies
determine whether a new regulation
constitutes a "major" rulemaking and, if
so, that a Regulatory Impact Analysis
(RIA) be conducted. An RIA consists of
the quantification of the potential
benefits, costs, and economic impacts of
a major rule. A major rule is defined in
Executive Order 12291 as a regulation
likely to result in: (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, or local
government agencies, or geographic
regions; or (3) a significant adverse
effect on competition, employment,
investment, productivity, innovation, or
on the ability of United States based
enterprises to compete with foreign
based enterprises in domestic or export
markets.
   As discussed elsewhere in this
preamble, EPA has estimated that
today's proposed rule will result
indirectly in significant cost savings, by
avoiding the increased costs that would
 otherwise be associated with regulating
UST petroleum-contaminated media,
 and debris as hazardous waste. See
EPA's draft reports titled "TC Study of
Petroleum UST Contaminated Media
 and Debris" and "The Impacts of
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     8512
Federal Register / Vol. 58, No. 28 / Friday, February  12,  1993 / Proposed Rules
     Removing the TCLP Deferral for
     Petroleum-Contaminated Media at
     Underground Storage Tank Sites" for
     documentation of those cost savings.
       Also, EPA does not believe the rule
     will significantly affect consumers,
     individuals, industries, Federal, State,
     or local government agencies, or
     geographic regions, or have significant
     adverse effects on competition,
     employment, investment, innovation, or
     international trade. Therefore, EPA has
     determined that today's proposed rule is
     not a major rule and that a Regulatory
     Impact Analysis is  not required.
     B. Regulatory Flexibility Act
       Under the Regulatory Flexibility Act
     (RFA) of 1980 {Pub, L. 96-345),
     whenever a Federal agency publishes a
     nolica of rulemaking for a proposed or
     final rule, it must prepare and make
                        available for comment a Regulatory
                        Flexibility Analysis that describes the
                        impact of the rule on small entities,
                        including small businesses, small
                        organizations, and small governmental
                        jurisdictions, unless the Agency head
                        certifies that the proposed action will
                        not have a significant economic impact
                        on a substantial number of small
                        entities.
                          This proposal will provide significant
                        regulatory relief to businesses, including
                        many small businesses, faced with
                        corrective action as  a result of releases
                        from petroleum USTs. Therefore,
                        pursuant to section  605(b) of the
                        Regulatory Flexibility Act, 5 U.S.C.
                        605(b), the Administrator certifies that
                        this rule will not have a significant
                        economic impact on a substantial
                        number of small entities.
 C. Paperwork Reduction Act

  This rule does not impose any
 additional reporting, recordkeeping, or
 information collection requirements on
 any member of the regulated public.
 Therefore, no estimate of public
 reporting burden is required for this
 rule.

 List of Subjects in 40 CFR Part 261

  Hazardous waste, Recycling,
 Reporting and recordkeeping
 requirements.
' Dated: January 20,1993.
 William K.Reilly,
 Administrator.
 [FR Doc. 93-3475 Filed 2-11-93; 8:45 am]
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