I
                                Thursday
                                June 13, 1991
                              Part III
                              Environmental
                              Protection  Agency
                                CFR parts 261, 264, and 265
                                                System;

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  27332
Federal Register  /  Vol.  56.  No. 114 / Thursday, June 13. 1991 / Rules  and Regulations
  ENVIRONMENTAL PROTECTION
  AGENCY

  40 CFR Parts 261,264, and 265

  [FRL-3963-6]

  Hazardous Waste Management
  System: Identification and Listing of
  Hazardous Waste; Standards for
  Owners and Operators of Hazardous
  Waste Treatment, Storage, and
  Disposal Facilities; and Interim Status
  Standards for Owners and Operators
  of Hazardous Waste Treatment,
  Storage, and Disposal Facilities

  AGENCY: Environmental Protection
  Agency.
  ACTION: Administrative stay.

  SUMMARY: The Environmental Protection
  Agency is today announcing an
  administrative stay of the hazardous
  waste listings F032. F034, and F035 in
  process areas at wood preserving plants.
  The primary effect of the stay is to
  conditionally extend the effective date
  of the drip pad management standards
  to February 6,1992, for the upgrade of
  existing drip pads and to May 6,1992,
  for the installation of new drip pads.
  Certain management standards for drip
  pads, the inclusion of past users of
  chlorophenolic formulations in the
 listing description for certain F032
 wastes, and the scope of wasiew&ten
 with respect to waters  Suttdo not come
 into contact with preservative are also
 being stayed.
 DATES: Effective Date: Jane 5,1991. For
 reporting deadlines, see section VI of
 this preamble.
 ADDRESSES: The official record far this
 administrative stay is idenfified as
 Docket Number F-91-WPWS-FFFFF
 and is located in the EPA RCRA Docket,
 room M2427.401 M Street SW.,
 Washington. DC 20480. The public must
 make an appointment in order to review
 docket materials by calling (202) 475-
 9327. The docket is available for
 inspection from 9 ajn. to 4 p.m., Monday
 through Friday, excluding Federal
 holidays. The public may copy material
 from any regulatory docket at a cost of
 $0.15 per page.
 FOM FURTHER INFORMATION CONTACT:
 For general information contact the
 RCRA Hotline, toll free at (800) 424-
 8346, or at (202) 382-3000. For technical
 information concerning this notice,
contact Edward L, Freedman, Office of
Solid Waste (OS-333). VS.
Environmental Protection Agency, 401M
Street SWM Washington. DC 20460.
(202} 245-3657.
                           SUPPLEMENTARY INFORMATION: The
                           contents o'f today's notice are listed in
                           the foflowirrg outline-
                           I. Background
                           II. Appropriate Effective Date for Drip Pad
                              Standards
                           III. Substantive Standards for Drip Pads
                           IV. Pentachloropheno! Cross-Contamination
                           V. Scope of the Wastewater Lasting
                           VI. Agency Action
                           VII. Efi'ecls On State Authorization
                           V!U. Paperwork Reduction Act

                           I. Background

                            On December 6.1990. EPA
                           promulgated regulations listing as
                           hazardous various wastes generated
                           from wood  preserving processes that
                           use chiorophenolic. creosote, and/or
                           inorganic (arsenical and chromium)
                           preservatives (55 FR 50450 (Dec. 6,1990),
                           adding hazardous wastes FO32, F034,
                           and F035 to the lists of hazardous
                           wastes in 40 CFR 261.31). IB additkm.
                          and of particular relevance for the
                          present notice, the Agency promulgated
                          standards for a new type of waste
                          management unit, a drip pad (5* FR
                          50484-69, adding a new subpart W to
                          parts 264 and 265 of the regulations).
                          Drip pads receive drippage from treated
                          wood immediately after the wood is
                          removed fron tke treatment vessel The
                          pads are eligible for 90-day generator
                          accumulation status under 5 262.34
                          provided they are designed and
                          operated in compliance with the subpart
                          W standards (amended § 282.34(«)p}. 55
                          PR 50983-44). The standards vaiy
                          somewkat for new and existing drip
                           Because the rule was promulgated
                         partially pursuant to the 1984
                         anendnrents and partially pursuant to
                         preexisting authorities, the requirements
                         take effect at different times in different
                         states. As a HSWA rule, the F032 listing
                         of various residues from wood
                         preserving processes using, or that
                         previously used, chlorophenolic
                         formulations takes effect on June 6,1991
                         in authorized and unauthorized States
                         (55 FR 59469-70 and RCRA section
                         3001(e)). Drip pads used in connection
                         with F032 wastes are likewise subject to
                         the subpart W standards on June 6 i» «fi
                         States (Id. at 50470). The F034 and P035
                         listings and related management
                         standards  do not take effect
                         immediately in authorized States since
                         they were not adopted pursuant to
                         HSWA (Id.).

                         H. Appropriate Effective Date for Drip '
                         Pad Standards                       '
                           The first issue discussed in the
                         present notice concerns the
                         effective date for the drip pad  =.-%?J
                         standards. After the rule was    "
   promulgated, the American Wood
   Preservers Institute (AWPI),
   representing a significant segment of the
   wood preserving industry, conducted a
   survey to determine its members' ability
   te comply with the drip pad standards "
   on June 6. Although results are
   somewhat fragmentary, it appears that a
   significant number of facilities subject to
   the lime 6 date are unable  to comply at
   that tine. Extrapolation of the survey
   results in  an estimate of 200 wood
   pKserving facilities subject to the June 6
   deadline (i.e. those managing F032
   wastes, those in unauthorized States.
   and those in States authorized for the
   wood preserving rule), of which
  approxmately 14C (70 percent) report
   that they are unable to comply on June
  8.
    The principal reasons cited for
  inability to comply are: (1) Difficulties in
  obtaining financing: (2) difficulties in
  obtaining a professional engineer's
  certification of compliance  (see
  § 285.441(a). 55 FR 50487); and (3)
  dfficulties in coordinating pad
  installation or upgrading activities with
  ongoing corrective action at the facility.
  {•addition, there has been some
  £acussion of difficulties in some
  e&nates of constructing pads during
  very cold or rainy seasons.
    EPA has examined this information
  carefully, and conducted its own
  independent inquiries and site visits.
  The Aeeacy's conclusion is  that,
  aitfaoogh a  significant percentage of
  facilities can comply with the June 6
  effective date, a significant portion are
  ••able to meet that date for legitimate
  reasons. In this regard, the Agency notes
  that it has phased in new design
 acquirements for other types of
 regulated units to accommodate similar
  difficulties to those now facing certain
 wood preservers. See § 265.193(a)
 {phasing in secondary containment
..xequirements for hazardous waste
 tmks); J 265.90(a) (groundwater
 monitoring requirements effective 18
 ssflBths after promulgation date): 47 FR
 J8555 (April 16,1982) (phasing in certain
 finnncitil responsibility requirements).
 The Affeacy notes further that the issue
 of drip pad compliance effective date
 did not receive a great deal of attention
 daring the rulemaking because the main
 focus of the industry's rulemaking
 comments challenged the need for
 Jhting these wastes at all, and also
 feeeause the court-ordered November 15,
 1MB. promulgation date necessitated an
          Agency review schedule.

              Standards for Drip Pads
            other affected industry
           questioned the

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                                                                            '. Juae 13. 1991 / Rule* TtaA
1
               appmprjatenew of raqmringnew drip
               pads to be seeled with an impermeable
               coating and *o have liners and leak
               detection systems « well. In their view,
               this level «f control »g either redundant
               or unnecessary, fa addition, fhey
               questioned the technical feasibility of
               finding an impermeable sealer for some
               arsenical solutions.
    IV. Penlachloropbenol Cross-
    Contamination
      A further issue that concerns the
    wood preserring industry is the scope of
    the F032 listing (for wastes  torn
    processes using pentachJorophenol as a
    preservative]. As promulgated, this
    listing includes wastes generated by
    creosote or CCA plants that previously
    used chlorophenolic formulations.
    Although the rules provide a procedure
    whereby an individual facility can
   demonstrate thai cross-
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      Persons unable to make this
    demonstration would have to cease
    operation by November 7, 1991. (The
    scheme is somewhat similar to the
    statutory loss of interim status
    provisions which required certain
    facilities to certify that the facility was
    in compliance with financial
    responsibility and groundwater
    monitoring requirements by a particular
    date or to cease operation fRCRA
    section 3005(e)(2))). EPA repeats thai the
    rule remains in effect for persons who
    do not comply with these conditions.
    EPA or the state, as appropriate, may in
    its discretion, allow a facility to operate
    beyond the November 6. 1991. deadline-
   provided, that (1) The respondent
    demonstrates that it cannot meet the
   November 6.1991. deadline because of
   circumstances entirely beyond its
   control, despite its best efforts to complv
   (e.g.. its impossibility of performance is"
   due to corrective action being
   undertaken at the wood preserving
   facility pursuant to a federal or state
   order or permit), and (2) such
   authorization to operate is set forth in
   an enforceable compliance  order.
    B. EPA has also decided to issue a
   stay of the requirement that new drip
   pads  be sealed coated, or covered with
   an impermeable material
   (§ 264.572(a)(4). § 265.443(a)(4)). The
   Agency is taking this step because we
   are now convinced that this requirement
   is unnecessary for pads constructed
  with a liner and leak detection system
  provided the pad is maintained in good
  condition with actions taken to remedy
  any cracks that may develop. The Kner
  £  f ?^Ae secondary containment
  thus fulfilling the Agency's object in
  developing management standards for
  dnp pads (55 FR at 50453). We
  consequently are staying this
  requirement. Thus, on May 6.1992 (i e
  the date when new pads must comply'
  with the regulatory standards), new   -
  pads will not be required to be sealed.
  coated, or covered with an impermeable
 material. EPA also intends to initiate
 rulemaking to determine whether to
 make this a permanent regulatory
 change.
   EPA  intends, however, that this
 requirement remain in place for existing
 pads, once those pads are required to
 comply with the regulatory standards,
 because few (if any) existing pads are
 known to have liner and leak detection
 systems that comply with the subpart W
 standards. Thus, on February 6,1992,
 existing pads must be sealed, coated, or
 covered with an impermeable surface
Because existing pads need not have
liner and leak detection systems
(SS 284JSn, 265.441) the requirement of
     an impermeable surface is necessarv to
     provide secondary containment. (The
     Agency has determined that
     commercially available sealants exist
     that would be appropriate for use at the
    pH of preservative solutions used by the
    wood preserving industry.)
      C. The Agency is also staying the
    portion of the rule that included wastes
    from plants generating F034 or F035
    wastes that previously used
    chlorophenolic formulations as within
    the scope of the F032 listing. Upon
    reflection, the Agency realizes that
    structuring the rule in this way is not
    serving any useful  environmental
    purpose. Wastes from creosote or
    inorganic arsenical wood preserving
    processes that previously used
    chlorophenolics are already classified
   as hazardous under the FC34 or F035
   listings. The regulatory standards for
   F032. F034. and F035 wastes are
   identical, so that the F032 listing does
   not carry with it a stricter regulatory
   regime (55 FR at 50467).  The only
   immediate regulatory consequence of
   the F032 listing for these plants is to
   make more facilities subject to the June
   6 compliance date. As explained above
   in the discussion on compliance dates
   for drip pads, this consequence has
   negative features because many
   facilities that can comply with the drip
   pad standards with some additional
   time appear unable to do so by June 6
  for legitimate reasons. Since the F032
  listing does not result in different
  substantive regulation for the wastes
  other than the timing of the effective
  date. EPA has decided to stay the scope
  of the F032 listing so that it does not
  cover wastes from creosote or inorganic
  arsenical plants that  previously used
  chlorophenolic preservatives as long as
  any wastes from that plant are regulated
  as F034 or F035 wastes. EPA also
  intends to initiate rulemaking to
  determine whether to permanently
  amend the F032 listing.
   The Agency notes,  however, that the
 issue of chlorophenolic cross-
 contamination will be relevant when
 EPA establishes treatment standards for
 the F032, F034 and F035 wastes under
 the land disposal restrictions program
 The fact that a waste may be classified
 as F034/F035 rather than F032 does not
 prevent the Agency from promulgating
 treatment standards for the
 chlorophenolic formulation, and the
 various dioxins and furans that may be
 present in these wastes as a result of
 equipment cross-contamination. Thus,
 the Agency anticipates including
standards for these constituents in ail of
the treatment standards for the listed
wood preserving wastes.
       D. Finally. EPA has decided to stay
     the listing of wastewaters so that the
     listing applies only to wastewaters that
     have come in contact with process
     contaminants, i.e.. wood preserving
     solutions, spent preservatives, and  the
     like, ll is these process contaminants
     that make the wastewater hazardous,
     and the Agency did not intend for the
     listing to apply to uncontaminated
     wastewaters (see 56 FR 21955. May  13.
    1991). Thus, if wastewaters are kept
    uncontaminated, they will not  be (and
    should not)  be covered by the listing
    EPA intends to initiate rulemaking to
    determine whether to n.ake this a
    permanent regulatory change.
     Any wood preserver claiming that
    wastewater has not come in contact
    with process contaminants would have
    the burden of proving  that this is the
    case. This is because the details of plant
    operation, and in particular wastewater
   management, are within the special
   knowledge of the wood preserving
   facility. See 50 FR at 643 (January 4,
   1985) and cases there cited. The best
   (and perhaps only) way of showing no
   contamination would be to segregate
   uncontaminated waters (for example,
   non-contact cooling water) from normal
   process wastes and process areas. Such
   segregation also serves a useful waste
   minimization function by reducing the
   total volume of contaminated
   wastewater. Thus, the Agency views
   today's action as creating an incentive
   for waste minimization. Conversely,
   however, the Agency notes that if
  initially uncontaminated wastewater is
  mixed with contaminated wastewater
  (as in a centralized wastewater
  treatment system)  or with process
  contaminants (such as rainwater falling
  on a process area drip pad), then the
  entire volume of wastewater is
  hazardous because of the mixture rule.
    E. EPA is issuing this administrative
  stay pursuant to 5 U.S.C. 705 which
  provides that an agency may postpone
  the effective date of action taken  by it
  when justice so requires, pending
 judicial review.' The Agency believes
 that this standard is satisfied here
 because it appears to be legitimately
 mfeasible for a significant number of
 wood preserving facilities to comply
 with the drip pad standards by June 6.
   In addition, the sealant requirement
 for new drip pads appears unnecessary
 and could add to the time needed to
 comply with drip pad standards.
 Inclusion of potentially cross-
 contaminated wastes within  the F032
 listing does not serve any direct
  "AW* l»* Bed .petition far review of the
PnntmNr Stale.

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     regulatory p«v«s (given &e uniform
     regulatory standards ior F032, F034. and
     F035 wastes), and causes more facilities
     to be subject to the June 6 effective date
     with which they may "be unable to
     comply. Inclusion of uncontaminated
     wastewaters within the scope of the
     listing is not necessary to further any
     legitimate environmental objective, and
     so should legitimately be stayed.
       At the same time, the administrative
     stay is structured so as to prevent
     environmental abuses from uncontrolled
     arippage during the pendency of the
     slay, and is further structured to be
     available only to facilities making bona
     fide efforts to comply. A .significant
    number of wood preservers thus could
    be harmed irreparably should the drip
    pad standards take effect on Jor.e 6. The
    conditions on the administralive stay
    plus structuring the duration of the stay
    to allow time for clean-up of dnppage
    contamination in existing process areas.
    also assures that the stay win be in the
    public interest. The Agency
    consequently find, thai iwmng this stay
    is in the interests of justice*
   VII. Effects on State Aotborieaijoa
     The effects of the administrative stay
   depend largely «n whether the facility fa,
   managing a wood preserving waste
   dentified by a HSWA-based listing fi.e
   the F032 wastes), as opposed to the    '
   "I* ? L81!? wastes 'F034 and F035) for
   which the listmgdetermmalions were
   based on pre-HSWA authority
   ,u As explained earlier. EPA consider
   that both the FQ32 lasting and the new
  subpart W dnp pad standards (when
  applied to the management of F032
  wastes} are  based on HSWA authority
  AsEPA explained in the December 6.
  £^LT uce (see K ra 50469J- *e
  "^A.basedFDSZ Irsting and related
  snbpart W facility standards take effect
  sinralraneousry hi all Stares, regardless
  of their authorization stains. With
  respect to these HSWA-based
  requirements, tins effect of tbe
  administrative »tay n to defer in all
  States EPA'a implementation and
  enforcement  of these requirements
              Agency does nol regard today's
                                  '
       ,              80od cause for '
  nd fa   °"°r '""'" a"d OP"0™""* for commen!
 jnd for nixing ,1 immfdidlely ^ffeclive. Th.s IB
 oemc out t)j. the penning compliance duie and
 of fcc?!m«  °f;jomplli"";re for ' Mb«.nnal number
 of facilities, *nd mean* of condition.^ the aiav to
 MJure continued protection of human health and
 Uje environment. In addition. EPA mis sought and
 oolumcd comment on thu action not only from the
 wood preserving industry but from members of the
enMfonmemal community and (he waste treatment
industry as well. Thefc also was opporVunity to
comment on all
            .   e  aso was opporu
comment on all of these issue* during the
nilemakinB "scif. so that further comment
unnecessary.
                      er comment may be
     beyond fum«, Km. in ncomrJance wtth
     Uie ad.nwiBtr.tiw ..bay schedule.
     According to the schedule for State
     program revisions contained m 4C CFR
     271.2l(e). the December 8.1990 Wood
     Presenration Rule is subject to • July i
     1992 deadline (July 1.1993 if a statutory
     change is required) for States to modify
     their hazardous waste programs and
     thereafter seek approval from EPA for
     the program revision. Since the
    administrative stay would not extend
    any effective dates beyond May 6.  1992.
    EPA considers it very unlikely that any
    State wiH have received approval from
    EPA to implement the December 6,1990
    regulation tmder RCRA authority with
    earlier or more stringent effective dates
    than those set out hi  this stay.
    Nevertheless, States  may modify their
    hazardoas waste programs to adopt the
    Wood  Preservative Rule in tfee interim.
    While  EPA encourages States to follow
    the deferred effective dates announced
   in this  stay. States nay etea. to
   implement the rale with effective dates
   earner  Bran those imposed under this
   stay, as a matter of State law.
     In the case of facsntte» managing ft34
   and F035 wastes, the effect of the stay
   depends on whether the facility is
   located in an authorized of? unauthorized
   State. The FB34 and RXJ5 fisting
   determinations were promulgated
   pursuant to pre-HSWA authority, and
   EPA considers tbe subpart W drip pad
   "FSS?**?*' 8°Vern *• ""«*«"««*
   of F034 and F035 wood preserving
   wastes to also be based on pre-HSWA
  authority. According to the December 6.
  1990 Rule notice, these wastes listings
  and facility standards  would have been
  effective on June 6.1991 only in those
  States that are not authorized for any
  part of RCRA. EPA implements the
  RCRA program in unauthorized States,
  and the effect  of this stay will be to
  defer EPA's implementation and
  enforcement of the Wood preserving
  Rule's F034 and R»5 provisions ki
  accordance with the administrative stav
  schedule.
   In authorized States,  the pre-HSWA
  basis for  the F034 and F035 listings (and
 related subpart W drip pad standards)
 means that these requirements cannot
 be implemented as RCRA requirements
 until the State has adopted die
 necessary program modifications and
 obtained approval for the necessary
 program modifications and obtained
 approval for the revisions from EPA.
 The modification schedule in 40 CFR
 271.20(e) requires that States modify
 their programs by July 1,1992 (July 1.
 1993 if a statutory change is required) to
adopt this regulation and thereafter seek
approval of the revisions from EPA.
                                                                                    Since the stay does not extend any
                                                                                    effective dates beyond May a, 1292. it is
                                                                                    unlikely that States will became
                                                                                    authorized for the F634 and F03S listing*
                                                                                    and fa ciliry standards before  tke
                                                                                    deferred effective o*ie* in the stay have
                                                                                    already passed. However, facilities in
                                                                                    both authorized states and unauthorized
                                                                                    states should understand that states
                                                                                    may adopt and implement wood
                                                                                    preserving regulations as a matter of
                                                                                    state law. prior to obtaining EPA
                                                                                    approval. While EPA strongly
                                                                                    encourages States to follow the deferred
                                                                                    effective dates announced in this stay.
                                                                                    States may elect to adopt wood
                                                                                   preserving waste regulations with more
                                                                                   •tringent'fe.f;., carter) effective dates
                                                                                   than those announced in this
                                                                                   administrative stay.
                                                                                      . Paperwork P^^tjnn Act

                                                                                     The information collection
                                                                                   requirements in &* ruieJave been
                                                                                   approved by fte Office of Management
                                                                                   and Budget fOMB) under the Paperwork
                                                                                   RedactioH Act -44 U&C. 3501 et seq.
                                                                                   The OMB approval number is 2050-915.
                                                                                   The public reporting burden for the
                                                                                   wood preserving rale {as pub&hed in
                                                                                  the Ftikul Register OH DecraBfaer*
                                                                                   1990). inclusive of the reporting
                                                                                  requirements in this administrative stay,
                                                                                  is estimated to result in a total of 271
                                                                                  hours per fadfty per yeer. The b«nten
                                                                                  prior to tfeis administrative stay was
                                                                                  estimated te average 272 hears per
                                                                                  facility per year.
                                                                                   Send comments regarding the burden
                                                                                  estimate or any other aspect of this
                                                                                  collection of information, including
                                                                                  suggestions Sot reducing this burden, to
                                                                                  Chief, Information Policy Branch, PM-
                                                                                  223. U.S. Environmental Protection
                                                                                  Agency. 401 M St. SW, Washington, DC
                                                                                  20460: and to the Office of Information
                                                                                  and Regulatory Affairs, Office of
                                                                                 Management and Budget, Washington.
                                                                                 DC  20503 marked "Attention: Desk
                                                                                 Officer for EPA."
                                                                                   Da ted:  Junes, IWl
                                                                                 F. Henry  HabichU
                                                                                 Acting Administrator.

                                                                                 List  of Subjects

                                                                                 •to CFR Part 261

                                                                                   Hazards materials. Waste treatment
                                                                                 and disposal. Recycling.

                                                                                40 CFR Part 264
  Hazardous materials, Packaging and
containers. Reporting requirements.
Security measures. Surety bonds. Waste
treatment and disposal.

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7336
              Federal Register  /  Vol. 56. No.  114 / Thursday.  June 13. 1991  / Rules  and  Regulations
  40 CFR Part 265

    Air pollution control, Hazardous
  materials, Packaging and containers.
  Reporting requirements, Security
  measures, Surety bonds, Waste
  treatment and disposal, Water supply.
    For the reasons set out in the
  preamble, title 40, chapter I is amended
  as set forth  below.
                                       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. 6905, 6912(a). 6921.
                                       6922. and 6938.
    2. Section 261.31 is amended by
  revising the F032, F034, and F035 1,stings
  to read as follows:

  f 261.31   Hazardous wastes from non-
  specific sources.      *
  Industry ana
     EPA
   hazardous
   waste Mo.
                                                    Hazardous waste
                                                                                                               Hazard
                                                                                                               cooe
  F032 '
         Wastewaters. process resduals, preservative dnppage. and spent formulauons from wood
          °T*L^ SI1*" PreWOUSty "^ ct"°«**e'>°* tormutadons (except potently crossontarnawsa
          wa«ecode deleted «  accordance w,rh §261.35 of Ms chapter and where the generator does not  resume
          chtorophenoHc formulabons). Th* ksung does not mdixte K001 bottom sediment sludgVfrom the tre
           rwerw  processes tha. use creosote and/ex pentachtoroohenoi. (NOTE: The kstnglrf was.ewa.ers
                                 Staye" rt™™™****. The feting for ptante that have prmously used
                                                                           These
                                                                                      processes oene-aled a' plants a- a-  f,
 F034 '
 F035'



 PART 264—STANDARDS FOR
 OWNERS AND OPERATORS OF
 HAZARDOUS WASTE TREATMENT,
 STORAGE, AND DISPOSAL
 FACILITIES

   3. The authority citation for part 264
 continues to read as follows:
   Authority: 42 U.S.C. 8905, 6912fa). 6924. and
 6925.

   4. Section 264.572 is amended by
 revising paragraph (aj(4) to read as
 follows:

 §264.572  Design and operating
 requirements.
   (a) *  * «
   (4) Be impermeable, e.g., concrete
 pads must be sealed, coated, or covered
 with an impermeable material such that
 the entire surface where drippage occurs
or may run across is capable of
containing such drippage and mixtures
of drippage and precipitation, materials,
                                      or other wastes while being routed to an
                                      associated collection system.

                                        Note: The requirement that new drip pads
                                      be impermeable, e.g., that new drip pads be
                                      sealed, coated, or covered with an
                                      impermeable material it administratively
                                      stayed. The stay will remain in effect until
                                      further administrative action is taken.
                                     PART 265—INTERIM STATUS
                                     STANDARDS FOR OWNERS AND
                                     OPERATORS OF HAZARDOUS WASTE
                                     TREATMENT, STORAGE, AND
                                     DISPOSAL FACILITIES

                                       5. The authority citation for part 265
                                     continues to read as follows:
                                       Authority: 42 U.S.C. 6905. 6912(a). 6924,
                                     6925. and 6935.

                                       6. Section 265.443 is amended by
                                     revising paragraph  (a){4) to read as
                                     follows:
 § 265.443 Design and operating
 requirement*.
   (a) * • •
   (4) Be impermeable, e.g., concrete
 pads must be sealed, coated, or covered
 with an impermeable material such that
 the entire surface where drippage occurs
 or may run across is capable of
 containing such drippage and mixtures
 of drippage.and precipitation, materials.
 or other wastes while being routed to an
 associated collection system.

  Note: The requirement that new drip pads
 be impermeable,  e.g., that new drip pads be
 sealed, coated, or covered with an
 impermeable material is administratively
 slaved. The stay will remain in effect until
 further administrative action is taken.
 •    *    •     »    *

 [FR Doc. 91-13954 Filed 6-12-91: 8:45 am)
BILLING COOE »540-SO-M

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