96-1713. Hazardous Waste Treatment, Storage, and Disposal Facilities and Hazardous Waste Generators; Organic Air Emission Standards for Tanks, Surface Impoundments, and Containers  

  • [Federal Register Volume 61, Number 28 (Friday, February 9, 1996)]
    [Rules and Regulations]
    [Pages 4903-4916]
    From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
    [FR Doc No: 96-1713]
    
    
    
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    ENVIRONMENTAL PROTECTION AGENCY
    40 CFR Parts 262, 264, 265, and 270
    
    [IL-64-2-5807; FRL-5407-2]
    
    
    Hazardous Waste Treatment, Storage, and Disposal Facilities and 
    Hazardous Waste Generators; Organic Air Emission Standards for Tanks, 
    Surface Impoundments, and Containers
    
    AGENCY: Environmental Protection Agency (EPA).
    
    ACTION: Final rule; technical amendment.
    
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    SUMMARY: Under the authority of the Resource Conservation and Recovery 
    Act (RCRA), as amended, the EPA has published air standards to reduce 
    organic emissions from hazardous waste management activities (59 FR 
    62896, December 6, 1994). The air standards apply to owners and 
    operators of hazardous waste treatment, storage, and disposal 
    facilities (TSDF) subject to RCRA subtitle C permitting requirements 
    and to certain hazardous waste generators accumulating waste in on-site 
    tanks and containers. This action makes clarifying amendments in the 
    regulatory text of the final standards, corrects typographical and 
    grammatical errors, and clarifies certain language in the preamble to 
    the final rule.
    
    EFFECTIVE DATE: The rule provisions clarified by this action are 
    effective as of June 6, 1996, the effective date of the final rule.
    
    ADDRESSES: This notice is available on the EPA's Clean-up Information 
    Bulletin Board (CLU-IN). To access CLU-IN with a modem of up to 28,800 
    baud, dial (301) 589-8366. First time users will be asked to input some 
    initial registration information. Next, select ``D'' (download) from 
    the main menu. Input the file name ``RCRACLAR.ZIP'' to download this 
    notice. Follow the on-line instructions to complete the download. More 
    information about the download procedure is located in Bulletin 104; to 
    read this type ``B 104'' from the main menu. For additional help with 
    these instructions, telephone the CLU-IN help line at (301) 589-8368.
        Docket. The supporting information used for this rulemaking is 
    available for public inspection and copying in the RCRA docket. The 
    RCRA docket numbers pertaining to this rulemaking are F-91-CESP-FFFFF, 
    F-92-CESA-FFFFF, F-94-CESF-FFFFF, F-94-
    
    [[Page 4904]]
    CE2A-FFFFF, and F-95-CE3A-FFFFF. The RCRA docket is located at Crystal 
    Gateway, 1235 Jefferson Davis Highway, First Floor, Arlington, 
    Virginia. Hand delivery of items and review of docket materials are 
    made at the Virginia address. The public must have an appointment to 
    review docket materials. Appointments can be scheduled by calling the 
    Docket Office at (703) 603-9230. The mailing address for the RCRA 
    docket office is RCRA Information Center (5305W), U. S. Environmental 
    Protection Agency, 401 M Street SW, Washington, DC 20460.
    
    FOR FURTHER INFORMATION CONTACT: The RCRA Hotline, toll-free at (800) 
    424-9346. For further information on the specific provisions to which 
    this clarification refers, contact Ms. Michele Aston, Emission 
    Standards Division (Mail Drop 13), Office of Air Quality Planning and 
    Standards, U.S. Environmental Protection Agency, Research Triangle 
    Park, North Carolina 27711, telephone number (919) 541-2363.
    
    SUPPLEMENTARY INFORMATION:
    
    Background
    
        The EPA is today making clarifying amendments to the final subpart 
    CC standards. Since the publication of the final rule, the EPA has 
    published two Federal Register documents to delay the effective date of 
    the final rule. The first (60 FR 26828, May 19, 1995) revised the 
    effective date of the standards to be December 6, 1995. The second (60 
    FR 56952, November 13, 1995) subsequently revised the effective date of 
    the standards to be June 6, 1996. The EPA has also issued a stay of the 
    standards specific to units managing wastes produced by certain organic 
    peroxide manufacturing processes (60 FR 50426, September 29, 1995).
        On August 14, 1995, the EPA published a Federal Register document 
    entitled, ``Proposed rule; data availability'' (60 FR 41870) and opened 
    RCRA docket F-95-CE3A-FFFFF to accept comments on revisions that the 
    EPA is considering for the final subpart CC standards. The EPA accepted 
    public comments on the appropriateness of these revisions through 
    October 13, 1995 and is now in the process of reviewing and evaluating 
    the comments that were received. The EPA expects to complete its review 
    of these public comments, and publish a Federal Register notice 
    explaining the EPA's decision if and how to amend the rule to reflect 
    the proposed revisions, in early 1996.
        Today's action clarifies provisions of the final rule to better 
    convey the EPA's original intent. While today's clarifications may be 
    applicable to certain comments submitted to docket F-95-CE3A-FFFFF, 
    today's action is independent of those proposed revisions and the 
    Federal Register document that EPA intends to publish in early 1996 
    addressing its evaluation of the proposed revisions. The information 
    presented in this preamble is organized as follows:
    
        1. Applicability.
        2. Definitions.
        3. Schedule for implementation of air emission standards.
        4. Standards: General.
        5. Waste determination procedures.
        6. Standards: Tanks.
        7. Standards: Surface impoundments.
        8. Standards: Containers.
        9. Closed-Vent Systems and Control Devices.
        10. Inspection and Monitoring requirements.
        11. Recordkeeping Requirements.
        12. Reporting Requirements.
        13. Alternative Control Requirements for Tanks.
        14. Immediate Effective Date.
    
    1. Applicability
    
        The EPA deferred applicability of the final subpart CC standards to 
    units used solely for on-site treatment or storage of hazardous waste 
    generated in the course of certain remedial activities. Paragraph 
    (b)(5) of Sec. 264.1080 and Sec. 265.1080 specified that this deferral 
    applied to ``remedial activities required under the corrective action 
    authorities of RCRA sections 3004(u), 3004(v) or 3008(h), CERCLA 
    authorities, or similar Federal or State authorities.'' However, page 
    62897 of the preamble to the final subpart CC standards stated that 
    this deferral applied to ``remedial activities required under RCRA 
    corrective action or CERCLA response authorities (or similar State 
    remediation authorities).'' Consistent with the regulatory language, 
    the EPA intended that this deferral apply to remedial activities under 
    the authority of RCRA corrective action, CERCLA response, similar 
    Federal authorities, or similar State authorities. An example of a 
    similar Federal authority would be the EPA Compliance Monitoring 
    Program (CMP) pursuant to the Toxic Substances Control Act, and a waste 
    management unit that is used solely for on-site storage of hazardous 
    wastes generated from remedial activities required by the CMP thus 
    would qualify for deferral from the applicability of the final subpart 
    CC standards.
        The EPA also deferred applicability of the subpart CC standards to 
    hazardous waste management units that are used ``solely'' to treat or 
    store radioactive mixed waste, in paragraph (b)(6) of Sec. 264.1080 and 
    Sec. 265.1080. EPA is clarifying here that the use of the word 
    ``solely'' does not preclude addition of other materials to a unit 
    managing radioactive mixed waste if applicable regulations of the 
    Atomic Energy Act or the Nuclear Waste Policy Act require that material 
    other than radioactive mixed waste be added to the unit. Such additions 
    would not contravene the purpose of EPA's limitation of the scope of 
    the deferral: To prevent radioactive mixed wastes from being used to 
    exempt other hazardous waste from the rule through mixing and to limit 
    the volume of mixed waste that is managed, again by limiting options 
    for exempt mixing. Thus, if any materials other than radioactive mixed 
    waste are added after June 6, 1996 to units used to treat or store 
    mixed waste, the regulatory deferral of the unit would not apply unless 
    the addition is pursuant to a regulatory requirement imposed pursuant 
    to the Atomic Energy Act and/or the Nuclear Waste Policy Act.
    
    2. Definitions
    
        The EPA is revising the definition of ``cover'' and adding a 
    definition for the term ``enclosure'' to clarify the EPA's intended 
    distinction between the two technologies, and to clarify the specific 
    requirements for an enclosure. As used in the final subpart CC 
    standards, the EPA considers a cover to be a device that is placed on 
    or over a unit and forms a barrier between the entire waste surface and 
    the space external to the unit. Examples of covers include a fitted lid 
    on a drum and a roof on a tank. In contrast, the EPA considers an 
    enclosure to be a structure that is external to a unit which surrounds 
    the unit and some space external to the unit. An example of an 
    enclosure would be a shed or a building within which a unit is either 
    permanently or temporarily located. The definition for ``cover'' 
    contained in the December 6, 1994 final standards listed an enclosure 
    surrounding a container as an example of a cover, which has led to 
    several inquiries from the public as to whether a tank located inside a 
    building equipped with a ventilation system routed to a control device 
    would meet the requirements for tank covers specified in 
    Sec. 264.1084(d) and Sec. 265.1085(d). It is not the EPA's intent to 
    allow an enclosure or building surrounding a tank to meet the control 
    requirements for the final subpart CC standards; see Hazardous Waste 
    TSDF Background Information for Promulgated Organic Air Emission 
    Standards for Tanks, Surface Impoundments, and Containers, EPA-
    
    [[Page 4905]]
    453/R-94-076b (``BID''), page 6-61. To make explicit what is already 
    implicit in the final rule, EPA is clarifying that an enclosure 
    surrounding a tank is not equivalent to a cover on a tank. Thus, the 
    EPA is removing the example of an enclosure from the definition of 
    ``cover'' and is creating a separate definition for the term 
    ``enclosure.''
        The final subpart CC standards require enclosures surrounding open 
    fixation containers to meet airflow and pressure drop requirements, as 
    specified in paragraph (b)(2)(ii) of Sec. 264.1086 and Sec. 265.1087. 
    The EPA has received a number of requests from the public to more 
    clearly specify these requirements. In response, the EPA is 
    specifically defining the term ``enclosure'' such that an enclosure be 
    designed and operated in accordance with the requirements of 
    ``Procedure T--Criteria for and Verification of a Permanent or 
    Temporary Total Enclosure'' contained in Sec. 52.741, appendix B. The 
    requirements of this procedure will provide facilities with a more 
    clear definition of the EPA's intent for the design and operation of 
    enclosures.
        The EPA is also amending the term ``waste stabilization'' to 
    specifically exclude the process of adding non-reactive absorbent 
    material to the surface of a waste. The EPA recognizes that to meet 
    certain criteria under the Land Disposal Restrictions, or to prevent 
    the introduction of liquids into certain combustion devices, owners or 
    operators apply absorbent material to the surface of wastes just prior 
    to disposal. In such procedures, the container is opened, absorbent 
    material is placed on the surface of the waste to absorb a relatively 
    small amount of liquid, and the container is closed. No mixing or 
    agitation is involved in this process. The EPA's intended definition of 
    waste stabilization for the final subpart CC air rules does not include 
    processes that do not include mixing or agitation, and do not involve 
    curing (BID, p. 6-57). The EPA is amending the definition of ``waste 
    stabilization'' to clarify this intent.
    
    3. Schedule for implementation of air emission standards
    
        The December 6, 1994 published rule establishes additional air 
    standards for TSDF owners and operators subject to 40 CFR part 264 or 
    40 CFR part 265. All requirements enacted under this final action are 
    effective as of June 6, 1996. This includes the application of the 
    requirements of 40 CFR part 265 subparts AA, BB, and CC to 90-day 
    accumulation units at hazardous waste generators, and the application 
    of 40 CFR part 265 subparts AA, BB, and CC to facilities with final 
    RCRA permits.
        The final rule provides that when the required air emission control 
    equipment cannot be operational at an existing hazardous waste 
    generator or TSDF by June 6, 1996, an implementation schedule for 
    installation of the equipment must be developed and placed in the 
    facility operating records no later than June 6, 1996. In such cases, 
    Sec. 265.1082(a)(2)(i) states that the facility owner or operator must 
    have all air emission controls required by the final rule in operation 
    no later than December 8, 1997.
        The EPA also recognizes that certain affected facilities may 
    require time beyond June 6, 1996 to implement other provisions of the 
    final standards, such as developing a facility program to perform the 
    specified leak detection tests on tank covers. Also, generator and TSDF 
    facilities to which the requirements of subparts AA and BB are newly 
    applicable on the June 6, 1996 effective date may need additional time 
    to come into compliance with all provisions of those subparts. The EPA 
    expects such instances to be rare, but in the event a facility cannot 
    implement any technical requirement of subparts AA, BB, or CC, it is 
    the EPA's intent that the owner or operator document the necessity for 
    a delay in the facility operating record. To be in compliance with the 
    rule, the necessary documentation must be in place by the June 6, 1996 
    effective date. To be in compliance with the subpart CC standards, 
    affected facilities must have all required air emission controls 
    installed and operating no later than December 8, 1997. However, 
    facilities newly subject to subparts AA and BB must be in compliance 
    with all the requirements of those subparts no later than 30 months 
    after the effective date that the facility becomes subject to those 
    subparts. Paragraph (a)(2) in Sec. 264.1033 and Sec. 265.1033 is 
    amended to clarify this intent.
        In addition, the EPA is clarifying that an affected unit which the 
    owner or operator intends to replace or remove may also be in 
    compliance through the use of an implementation plan. The EPA 
    recognizes that certain facilities may choose to comply with the 
    subpart CC air rules by replacing an existing hazardous waste 
    management unit, or by modifying their facility process such that a 
    given waste management unit is no longer necessary. The EPA also 
    realizes that facilities could require time beyond June 6, 1996 to 
    complete such modifications, during which time it may be necessary for 
    the facility to continue adding hazardous waste to the affected unit. 
    The EPA had therefore intended to allow the owner or operator to be in 
    compliance with the subpart CC standards provided that sufficient 
    documentation is entered into the facility operating record by the June 
    6, 1996 effective date. The facility operating record must contain 
    sufficient information to document the necessity to continue adding 
    hazardous waste to the unit after June 6, 1996, and document the owner 
    or operator's schedule and plan to cease adding hazardous waste to the 
    affected unit as soon as is feasible, but no later than December 8, 
    1997 (BID p. 9-6).
        Paragraphs (b)(3) and (b)(4) in Sec. 264.1080 and Sec. 265.1080 
    specify that the subpart CC standards do not apply to tanks or surface 
    impoundments for which the owner or operator has begun implementing or 
    has completed closure pursuant to an approved closure plan, and into 
    which the owner or operator has stopped adding hazardous waste. 
    However, if a closure plan has not been approved for an affected unit, 
    the final subpart CC standards are applicable to that unit. In such a 
    case, the subpart CC standards require that on the June 6, 1996 
    effective date, if the affected unit is not equipped with the 
    appropriate air emission controls, no hazardous waste may be added to 
    that unit. In this situation, it is the EPA's intent that the owner or 
    operator would be in compliance with the subpart CC standards provided 
    that sufficient documentation is entered into the facility operating 
    record by the June 6, 1996 effective date. This is consistent with the 
    situation described in the previous paragraph where the removal of an 
    affected unit cannot be accomplished before the June 6, 1996 effective 
    date. As with the situation described above, the facility operating 
    record must contain sufficient information to document the inability of 
    the owner or operator to cease adding hazardous waste to the unit prior 
    to June 6, 1996. The facility operating record must also include the 
    owner or operator's schedule to obtain an approved closure plan, or to 
    cease adding hazardous waste to that unit, no later than December 8, 
    1997.
        The December 6, 1994 published rule allowed an extended effective 
    date and compliance date for tanks in which stabilization operations 
    are performed, to allow interested parties time to submit data to the 
    EPA and to allow EPA time to review that data (59 FR at 62897). The 
    effective date for such tanks was originally December 6, 1995. Since 
    the publication of that final rule, the effective date of the final 
    standards for all rule provisions has been extended 
    
    [[Page 4906]]
    until June 6, 1996 (60 FR 56952). Therefore, the EPA no longer 
    considers it necessary to provide a separate compliance schedule for 
    tanks in which stabilization operations are performed, and the 
    effective date for such tanks will be the June 6, 1996 effective date 
    of the final rule.
    
    4. Standards: General
    
        The owner or operator must install and operate the specified air 
    emission controls on every affected tank, surface impoundment, and 
    container used in the waste management sequence from the point of waste 
    origination through the point where the organics in the waste are 
    removed or destroyed by a process in accordance with the requirements 
    of the rule. The final rule provides seven options by which an owner or 
    operator may demonstrate that the required treatment or destruction of 
    organics has been accomplished, as specified in Sec. 265.1083(c)(2) (i) 
    through (vii). Depending on the nature of the affected hazardous waste, 
    the process through which the waste has been managed, or the treatment 
    applied to the waste, one or more of these seven demonstration options 
    may not be appropriate for a given waste stream. In recognition of 
    this, the EPA chose to allow seven different options to demonstrate 
    that effective treatment has been accomplished; the EPA recognizes that 
    not all of these seven options will be practical for demonstrations of 
    all waste treatment scenarios. However, the EPA believes that the 
    variety of waste treatment demonstrations allowed in the final subpart 
    CC rules does offer at least one demonstration alternative for most, if 
    not all, reasonable waste treatment scenarios.
        Paragraph (c)(2)(iii) of Secs. 264.1082 and 265.1083 is one of the 
    seven options to demonstrate that waste has been treated to effectively 
    reduce the organics in accordance with the requirements of the final 
    subpart CC standards. In the December 6, 1994 published rule, this 
    option required that the ``actual organic mass removal rate (MR) for 
    the process is greater than the required organic mass removal rate 
    (RMR) for the process.'' The EPA had intended this provision to specify 
    that the MR for the process must be greater than or equal to the RMR. 
    The EPA is amending this provision to clarify that intent.
        The seven options in Sec. 265.1083(c)(2) refer to a waste treatment 
    process that accomplishes specified organic destruction or removal. As 
    the term ``process'' is used in these requirements, the EPA refers to 
    either a single waste treatment unit, or a series of waste treatment 
    units. If a facility uses a series of waste treatment units, the 
    applicable exemption from controls applies to units downstream of the 
    point where the necessary removal or destruction occurs. Thus, points 
    downstream of the unit which accomplishes the 95th percentile reduction 
    would not be required to install and operate air emission controls.
        Similarly, the requirement for covers on tanks and surface 
    impoundments do not apply to tanks or surface impoundments in which 
    biological degradation of the organics in the hazardous waste treated 
    in the unit is demonstrated to achieve specific performance levels. 
    Either of the following sets of conditions, as described in paragraph 
    (c)(2)(iv) of Sec. 264.1082 and Sec. 265.1083, must be demonstrated to 
    qualify for this exemption: (1) The organic reduction efficiency for 
    the process is equal to or greater than 95 percent, and the organic 
    biodegradation efficiency for the process is equal to or greater than 
    95 percent; or (2) the total actual organic mass biodegradation rate 
    for all hazardous waste treated by the process is equal to or greater 
    than the required organic mass removal rate (59 FR at 62915). A 
    biological treatment unit that is operated within a series of units 
    would not be required to be equipped with a cover provided that series 
    of units met one of the treatment demonstration options in 
    Sec. 265.1083(c)(2), and the biological treatment unit occurred in the 
    series at the point where the necessary treatment was achieved. In the 
    case of a treatment series that achieved a 95 percent reduction in 
    organics by weight as demonstrated by the requirements of 
    Sec. 265.1083(c)(2)(ii), the biological treatment unit could operate 
    without a cover provided that it was the unit achieving the 95th 
    percent control for the affected waste streams. However, if the 
    placement of the biological treatment unit in the treatment series was 
    prior to the achievement of the 95th percent organic reduction, the 
    biological treatment unit must operate with a cover and air emission 
    controls.
        Paragraph (d) in Secs. 264.1082 and 265.1083 of the final rule 
    indicated that certain materials that are not hazardous wastes must be 
    controlled in accordance with the subpart CC standards. These final 
    standards are only applicable to RCRA hazardous waste. The EPA is 
    amending Secs. 264.1082(d) and 265.1083(d) to clarify that non-
    hazardous wastes are not subject to the subpart CC standards. (This 
    means, incidentally, that wastes that become exempt from RCRA subtitle 
    C by virtue of an exemption such as the Bevill amendments (codified at 
    261.4(b)(7)) or the domestic sewage exclusion (codified at 261.4(a)(1)) 
    would not be subject to the subpart CC rules.) In making this 
    clarification, the EPA also notes that it is not addressing here (or in 
    any way reopening) the issue of the types of treatment standards under 
    the Land Disposal Restriction program to which hazardous waste 
    treatment residues could be subject before land disposal. Such 
    treatment standards could apply to spent treatment residues that are 
    not themselves identified or listed as a hazardous waste. See 58 FR at 
    29866-868 and 29871-72 (May 24, 1993) and Chemical Waste Management v. 
    EPA, 976 F.2d 2, 16-18 (D.C. Cir. 1992), cert. denied 113 S. Ct. 1961 
    (1993). This same caveat applies with respect to the spent activated 
    carbon residue discussed at section 9 below.
    
    5. Waste Determination Procedures
    
        Under the final subpart CC standards, a TSDF owner or operator is 
    not required to determine the volatile organic concentration of the 
    waste if it is placed in a tank, surface impoundment, or container 
    using the required air emission controls. However, an owner or operator 
    must perform a determination of the average volatile organic (VO) 
    concentration for each hazardous waste placed in a waste management 
    unit exempted from using air emission controls based on the VO 
    concentration of the waste at its point of waste origination. The EPA 
    is amending paragraphs (a)(1) and (b)(1) of Sec. 264.1083 to clarify 
    this requirement.
        The determination of the volatile organic concentration of 
    hazardous waste under the final subpart CC standards is based on the 
    organic composition of the waste at the ``point of waste origination.'' 
    The ``point of waste origination'' is defined in Sec. 265.1081 of the 
    final rule with respect to the point where the TSDF owner or operator 
    first has possession of a hazardous waste. This definition specifies 
    that when the TSDF owner or operator is the generator of the hazardous 
    waste, the ``point of waste origination'' means the point where a solid 
    waste produced by a system, process, or waste management unit is 
    determined to be a hazardous waste as defined in 40 CFR part 261. In 
    such a case, the owner or operator may sample the hazardous waste at 
    its point of origination, or may sample the waste at a point downstream 
    from the point of origination, provided the downstream sampling point 
    provides an accurate representation of the waste volatile organic 
    concentration as it was at the point of waste origination. Simply put, 
    an owner or operator may sample 
    
    [[Page 4907]]
    downstream of the point of origination provided the waste has not been 
    altered, mixed with other materials, or allowed to release any volatile 
    organic components prior to sampling. When neither the TSDF owner or 
    operator is the generator of the hazardous waste, the ``point of waste 
    origination'' means the point where the owner or operator accepts 
    delivery or takes possession of the hazardous waste. The EPA considers 
    this to be the point when and where the TSDF owner or operator accepts 
    the waste manifest document for the hazardous waste.
        The preamble to the final subpart CC rule incorrectly stated that 
    to calculate the average of a waste stream using direct measurement, 
    ``a sufficient number of samples, but no less than four, must be 
    collected to represent the complete range of organic compositions and 
    organic quantities that occur in the hazardous waste stream during the 
    entire averaging period'' (59 FR at 62916). The intended rule 
    requirement to take a minimum number of four waste samples is for the 
    performance of one single waste determination. The requirement for four 
    individual samples is intended to compensate for both variations in the 
    methodology and variations within a waste stream that may be due to 
    non-homogeneous waste mixtures. It is not acceptable to take four or 
    more individual samples of a waste stream, mix the samples, then 
    perform a method 25D analysis on the mixture. The requirements of 
    Sec. 265.1084(a)(5)(iv) specify the procedure by which the four or more 
    samples be analyzed by method 25D individually, and the results 
    mathematically averaged to produce one waste determination result. This 
    process accounts for test method variability as well as variability in 
    the waste stream and the waste samples.
        The EPA recognizes that not all hazardous waste regulated by the 
    subpart CC standards is liquid or aqueous. Therefore, Sec. 4.1.4 of 
    method 25D (40 CFR part 60, appendix A) includes a sampling technique 
    for solid materials. For wastes that are solid or semi-solid, a 
    representative sample is obtained by placing a 10 gram sample of the 
    waste material into a vial containing the specified 30 mL of 
    polyethylene glycol. Once the sample is obtained, the method 25D 
    analysis is performed as it would be on any other waste sample.
        To calculate an average volatile organic concentration for a waste 
    stream that has variations in the organic concentration, the owner or 
    operator must perform the number of waste determinations that are 
    necessary to adequately demonstrate that the waste stream volatile 
    organic concentration meets the applicable criteria. An owner or 
    operator may choose to perform a waste determination at a point where 
    they know the waste stream is at its maximum volatile organic 
    concentration for the averaging period. If the resulting average of the 
    four required Method 25D sample runs yields a volatile organic 
    concentration below 100 parts per million by weight (ppmw), the owner 
    or operator would not need to perform additional waste determinations 
    for that averaging period. However, if the owner or operator was not 
    able to perform a waste determination at the point of the waste 
    stream's maximum volatile organic concentration, they could be required 
    to perform additional waste determinations during the averaging period 
    to sufficiently calculate a mass-weighted average volatile organic 
    concentration. The final subpart CC standards specify that the facility 
    owner or operator enter into the facility record a test plan that 
    demonstrates how they will perform a representative volatile organic 
    concentration determination.
        The final subpart CC rules require that a waste determination be 
    performed prior to the first time a hazardous waste is placed in an 
    affected unit on or after June 6, 1996. Section 265.1084(a)(2) (i) and 
    (ii) specify the process to determine the average VO concentration for 
    waste streams generated as part of a continuous process or generated as 
    part of a batch process that is performed repeatedly but not 
    necessarily continuously. The EPA is amending Sec. 265.1084(a)(2) to 
    clarify that for waste generated as part of a batch process that is not 
    performed repeatedly, the owner or operator shall perform a waste 
    determination of the VO concentration of the waste in the batch. The 
    EPA is amending Sec. 265.1084(b)(2) to clarify the similar waste 
    determination procedures for treated hazardous waste.
        The procedures in paragraphs (a)(5), (a)(6) and (b)(4) of 
    Sec. 265.1084 for determining the average VO concentration of a 
    hazardous waste require that the owner or operator have sufficient 
    knowledge of any variations in the volatile organic concentration of 
    their affected waste streams throughout the averaging period. An owner 
    or operator who does not have sufficient knowledge of variations in the 
    VO concentration of their waste stream prior to June 6, 1996, may not 
    be eligible to determine compliance with the final rule using the 
    average VO concentration for their affected waste streams. The option 
    to use an average volatile organic waste concentration requires 
    sufficient knowledge of the waste stream, and if that knowledge is not 
    available, the option is not allowed. In such a case, the owner or 
    operator would be required to install and operate air emission controls 
    on each affected unit receiving hazardous waste on or after June 6, 
    1996 (as required by paragraph (b) of Sec. 264.1082 and Sec. 265.1083), 
    or to determine that at no time waste with a VO concentration greater 
    than or equal to 100 ppmw is placed in a unit not equipped with the 
    required air emission controls (as required by paragraph (c) of 
    Sec. 264.1082 and Sec. 265.1083). In essence, each and every portion of 
    the hazardous waste entering the unit would be considered to be a 
    discrete quantity that is not generated as part of a batch process; 
    therefore, the average VO concentration of each of these discrete 
    quantities of waste would be the same as its measured VO concentration 
    (as described in Sec. 265.1084(a)(2)(iii) and Sec. 265.1084(b)(2)(iii), 
    as amended by today's action).
        In Sec. 265.1084(a)(5)(v)(C) the equation to determine the average 
    VO concentration of the hazardous waste at the point of waste 
    origination was printed with an incorrect symbol representing the 
    average VO concentration of the hazardous waste at the point of waste 
    origination. The EPA is revising that equation to specify the correct 
    symbol.
        Section 265.1084(a)(6)(iii) of the final subpart CC standards 
    allows an owner or operator to determine the volatile organic 
    concentration of a hazardous waste using knowledge that is based on 
    information supplied by the generator of the waste. The generator-
    prepared information can be included in manifests, shipping papers, or 
    waste certification notices accompanying the waste shipment, as agreed 
    upon between the waste generator and the TSDF owner or operator. The 
    subpart CC final rules do not impose requirements for a generator to 
    provide such documentation to a TSDF. Rather, where such information 
    does exist, the TSDF owner or operator has the option to use that 
    information to perform the volatile organic waste determination or the 
    volatile organic vapor pressure determination upon accepting delivery 
    or taking possession of the hazardous waste. The EPA is amending 
    paragraph (b)(8) of Sec. 264.13 and Sec. 265.13 to clarify this intent. 
    The validity of any information used to comply with these final 
    standards is the responsibility of the owner or operator who has 
    custody of the waste. Therefore, a TSDF owner or operator should rely 
    on waste information only if it is provided by a source in whose 
    accuracy they have confidence.
    
    [[Page 4908]]
    
        The December 6, 1994 published rule incorrectly referenced the 
    requirements by which waste streams entering a process must be 
    measured, at Sec. 265.1084(b)(6)(iii)(B) and in the nomenclature for 
    CBj at Sec. 265.1084(b)(6)(iv). The EPA is amending these 
    provisions to reference the requirements contained in paragraph 
    (a)(5)(iv). The EPA is also amending the nomenclature for QAj in 
    Sec. 265.1084(b)(6)(iv) to clarify that it represents the mass quantity 
    of waste exiting the process.
        To determine the maximum organic vapor pressure of a hazardous 
    waste in a tank using Method 25E, an owner or operator shall collect a 
    minimum of three waste samples. It was the intent of the EPA to defer 
    to the Clean Air Act General Provisions contained in Sec. 60.8(f) to 
    specify the number of samples required for a Method 25E analysis. 
    However, the subpart CC standards are not subject to Sec. 60.8(f); 
    therefore, this information was not referenced for the final subpart CC 
    standards. The EPA is amending the requirements of paragraph 
    265.1084(c) to require that, unless otherwise specified in the method 
    being used, a minimum of three samples shall be taken when using any of 
    the methods listed in Sec. 265.1084(c)(3)(ii). To perform a Method 25E 
    analysis, each of these samples shall be analyzed separately, and the 
    result of the analysis mathematically averaged. The requirements of 
    Method 25E specify the procedure to analyze the samples and 
    mathematically average the analytical results.
    
    6. Standards: Tanks
    
        In the final subpart CC tank standards, paragraph (b)(4) of 
    Sec. 264.1084 and Sec. 265.1085 allows the use of a pressure tank to 
    manage affected hazardous waste. The EPA did not intend to specify 
    operating conditions or a minimum internal pressure that must be met to 
    comply with the option. For the purpose of complying with this 
    provision of the subpart CC standards, the EPA is clarifying that a 
    pressure tank must be designed and operated such that the internal 
    pressure is above atmospheric pressure and the tank operates as a 
    closed system, with no detectable emissions occurring during routine 
    operations including filling and emptying (BID p. 6-51). Therefore, the 
    tank must be designed and operated to withstand the pressure of having 
    the vapor space of the waste compressed until the tank is filled to 
    design capacity. The EPA is amending the tank standards to clarify this 
    requirement.
        The EPA intended that the final subpart CC standards allow tanks to 
    operate with a fixed-roof type cover without any additional air 
    emission controls provided certain conditions were met (59 FR at 
    62917). As published in the December 6, 1994 final standards, paragraph 
    (c) of Sec. 264.1084 and Sec. 265.1085 did not correctly convey the 
    EPA's intent for this provision. The EPA is revising these paragraphs 
    of the tank standards to clarify that for the purposes of compliance 
    with the subpart CC standards, tanks meeting the specified waste 
    management requirements can operate fixed-roof type covers without 
    additional air emission controls.
        One of the conditions that must be met for this provision is that 
    no turbulent agitation may occur on the surface of the waste, as 
    described in paragraph (c)(1) of Sec. 264.1084 and Sec. 265.1085. Such 
    turbulence on the surface of a waste increases emission of organics 
    from the waste to the air. This cover-only option was provided for 
    tanks that are used for waste storage, and in which no waste treatment 
    is occurring. The cover-only option of paragraph (c)(1) does not 
    provide effective emission control for waste that is managed such that 
    there is visible turbulent flow on the surface of the waste. The EPA 
    considers that the requirements of paragraph (c)(1) are consistent with 
    the provisions of the New Source Performance Standard for volatile 
    organic liquid storage vessels under 40 CFR part 60, subpart Kb, after 
    which the technical requirements for fixed-roof covers were modelled. 
    The EPA does not intend to specify a test to measure turbulent flow, or 
    to otherwise narrowly define the conditions that meet this paragraph. 
    The EPA does wish to clarify that for a tank through which the waste 
    surface is not viewable, an owner or operator may elect to use 
    engineering calculations and modelling to determine if the surface of 
    the hazardous waste managed in a tank has turbulent flow that would be 
    visible.
        The EPA recognizes that, for certain hazardous wastes managed in 
    tanks, it may be necessary to continuously mix, stir or circulate the 
    waste inside the tank during normal storage operations. For instance, 
    the properties of the waste may be such that it is necessary to 
    continuously stir the waste to prevent phase separation or to prevent 
    the waste from solidifying. Paragraph (c)(1) of Sec. 264.1084 and 
    Sec. 265.1085 prohibits such activities if they result in splashing, 
    frothing, or visible turbulent flow on the surface of the waste. 
    However, an owner or operator may perform continuous or frequent mixing 
    operations in a cover-only tank, provided the operation does not cause 
    visible turbulent flow on the surface of the waste. To be allowed under 
    the requirements of paragraph (c)(1), such a mixing operation must be 
    designed and performed to operate without causing visible turbulent 
    flow on the waste surface. To design and operate a mixing system to 
    ensure that visible turbulent flow does not occur, the owner or 
    operator must consider all relevant factors, including mixing speed, 
    position of the mixing apparatus, and waste level in the tank. If the 
    mixing apparatus is positioned and designed such that visible turbulent 
    flow occurs when the waste is below a certain level in the tank, the 
    mixing operation must be ceased when the waste is not above that level 
    in the tank. During such a period, visible turbulent flow on the 
    surface of the waste would be allowed if it resulted from an 
    intermittent required operation, such as loading waste into the tank.
        The EPA recognizes that owners or operators may need to mix, stir 
    or circulate the waste that is stored in tanks to occasionally perform 
    certain necessary operations, and these actions may result in 
    splashing, frothing, or visible turbulent flow. Examples of this 
    include mixing waste contents at sample times to facilitate obtaining a 
    representative waste sample, and causing visible turbulent flow on the 
    waste surface during transfer of hazardous waste into or from the tank. 
    In such a situation, there would be a mixing apparatus available to be 
    used in the tank, but this apparatus would not be in use during normal 
    waste storage operations. The EPA considers some degree of splashing, 
    frothing, or visible turbulent flow to be allowable, provided that the 
    activity causing this condition is waste sampling, waste transfer, or a 
    similar necessary operation that is performed infrequently. The 
    requirements of Sec. 264.1084(c)(1) and Sec. 265.1085(c)(1) specify 
    that the disallowed waste management activities must not be part of the 
    normal process operations for that tank. The EPA intends that provision 
    to prohibit continual or usual performance of such procedures, but 
    allow the procedure when necessary to perform intermittent operations, 
    such as waste sampling or waste transfer (BID p. 6-54). Therefore, a 
    tank for which the waste transfer operation is continuous or occurs 
    frequently and causes visible turbulent flow, should be equipped with 
    organic emission controls in accordance with paragraph (b) of 
    Sec. 264.1084 and Sec. 265.1085. Similarly, the EPA intends that this 
    clarification also apply to hazardous waste management in surface 
    impoundments complying with the 
    
    [[Page 4909]]
    floating membrane cover provisions of Sec. 264.1085(c) and 
    Sec. 265.1086(c).
        An additional condition that must be met for the fixed-roof cover 
    control option requires that the waste managed in the unit have a 
    volatile organic vapor pressure below certain limits based on the 
    capacity of the tank, as described in paragraph (c)(4) of Sec. 264.1084 
    and Sec. 265.1085. The waste managed in the tank must meet the 
    appropriate volatile organic vapor pressure limits at the highest vapor 
    pressure that will occur under normal operating conditions. Unlike the 
    waste volatile organic concentration determination which must represent 
    individual waste streams prior to mixing or dilution, the waste organic 
    vapor pressure determination must indicate the vapor pressure of the 
    actual mixture of waste that is managed in the tank. The waste organic 
    vapor pressure to be compared to the limits specified in 
    Sec. 264.1084(c)(4) and Sec. 265.1085(c)(4) of the final rule is the 
    highest pressure present among any temperatures at which the waste is 
    present in the tank.
        The EPA had intended the final subpart CC standards to allow fixed-
    roof covers on tanks to be equipped with one or more pressure relieving 
    devices that vent directly to the atmosphere to allow for the relief of 
    pressure or vacuum caused by normal operations (BID p. 6-47). For the 
    purposes of this provision the EPA requires that the pressure relieving 
    device be a normally closed device that opens only when a pressure or 
    vacuum is created in the unit. The EPA does not intend to specify 
    parameters for the operation or setting of such pressure relieving 
    device, but rather has established a performance standard that the 
    facility owner or operator design and operate the conservation vents so 
    that emissions to the atmosphere are minimized, yet tank integrity is 
    protected, in accordance with sound engineering design specifications 
    and practices appropriate for the affected tank. This provision is 
    clarified in the amendments to paragraph (c) of Sec. 264.1084 and 
    Sec. 265.1085. This allowance for pressure relieving devices differs 
    from the final rule allowance for safety devices described in paragraph 
    (g) of Sec. 264.1084 and Sec. 265.1085, which are only allowed to vent 
    to the atmosphere during unplanned events. Units not eligible to be 
    equipped with pressure relieving devices that open during normal 
    operations include pressure tanks, and tanks equipped with floating 
    roofs.
    
    7. Standards: Surface Impoundments
    
        In the December 6, 1994 published rule, paragraph (d) of 
    Sec. 264.1085 and Sec. 265.1086 incorrectly referenced paragraph 
    (b)(1), which does not exist. The EPA is amending paragraph (d) of 
    these sections to reference paragraph (b), as intended.
    
    8. Standards: Containers
    
        In Sec. 264.1086 and Sec. 265.1087, paragraph (b)(1) lists three 
    options to demonstrate compliance for containers used to manage 
    hazardous waste subject to subpart CC. The first option, in paragraph 
    (b)(1)(i), specifies that the container operates with no detectable 
    emissions as tested by Method 21 in 40 CFR part 60 appendix A. This 
    option is appropriate for any container subject to subpart CC, 
    including the types of containers specified in the second and third 
    options. The second option, in paragraph (b)(1)(ii), is a container 
    with a capacity of 0.46 cubic meters, which complies with all 
    Department of Transportation regulations for packaging hazardous waste 
    for transport under 40 CFR part 178. The third option, in paragraph 
    (b)(2)(iii), is a tank truck or rail car that has been demonstrated 
    within the previous 12 months to be organic vapor tight using the 
    pressure test specified in Method 27 of 40 CFR part 60 appendix A. The 
    EPA has received several questions regarding the applicability of 
    Method 27 for use on vehicular containers that are not equipped with a 
    vapor recovery system. This method is a pressure test procedure 
    originally developed by the EPA for determining the vapor-leak 
    tightness of a gasoline tank truck equipped with a vapor recovery 
    system. The EPA also considers Method 27 appropriate on tank trucks and 
    rail cars that are used to manage hazardous waste, regardless of 
    whether the tank truck or rail car is equipped with a vapor recovery 
    system. As described above, an owner or operator of a tank truck or 
    rail car has the option to comply with paragraph (b)(1)(i), and 
    demonstrate no detectable emissions by Method 21, as does the owner or 
    operator of any container equal to or less than 0.46 m\3\ in capacity.
        Paragraph (b)(2)(ii) of Sec. 264.1086 and 265.1087 of the December 
    6, 1994 final standards describes the criteria for an enclosure in 
    which stabilization operations performed in open containers must be 
    located. In describing the requirements for the enclosure, the EPA had 
    intended to paraphrase the specifications of Procedure T in Appendix B 
    to Sec. 52.741, titled ``Criteria for and Verification of a Permanent 
    or Temporary Total Enclosure.'' To better clarify the intended 
    requirements for container enclosures, the EPA is revising the 
    enclosure requirements of paragraph (b)(2)(ii) to specifically 
    reference Procedure T in Sec. 52.741, Appendix B.
        The waste transfer requirements specified in paragraph (b)(3) of 
    Sec. 264.1086 and Sec. 265.1087 of the final rule for containers are 
    intended to reduce exposure of hazardous waste to the atmosphere. 
    Paragraph (b)(3)(i) specifically describes submerged-fill techniques to 
    be used; however, the EPA does not intend that submerged-fill be 
    performed in situations where the process of submerged-fill increases 
    waste exposure to the atmosphere, or worker exposure to hazardous 
    wastes. Certain splash loading operations are performed through a 
    fitted opening in the top of a container, and the transfer line is 
    subsequently purged with nitrogen gas to clean the interior of the line 
    before it is removed from the container opening. This transfer practice 
    could result in less waste exposure than a submerged-fill practice 
    performed for the same waste and container. Another container loading 
    practice is vapor balancing, in which the vapors displaced by 
    transferring waste into a container are routed to the unit from which 
    the waste was transferred. Thus, the EPA is adding clarifying language 
    to the container transfer requirements of paragraph (b)(3) in 
    Sec. 264.1086 and Sec. 265.1087 to direct owners or operators to 
    transfer waste using the procedure that will minimize exposure of waste 
    to the atmosphere.
        The submerged filling procedure described in the final subpart CC 
    standards is one procedure that may be appropriate for waste transfer 
    into containers, but the EPA is amending these provisions to direct 
    owners or operators to employ the container filling practice most 
    appropriate for their facility operation.
        The EPA originally intended the subpart CC final rules to allow 
    containers to vent emissions directly to the atmosphere during filling 
    operations. The December 6, 1994 final rules only allowed for venting 
    through the opening through which waste was transferred. The EPA 
    intended to allow venting during waste transfer operations either 
    through the opening through which the waste is transferred, or through 
    a second opening that would serve as a vent. In addition to the 
    amendment to paragraph (b)(3) described above, the EPA is amending 
    paragraph (c) of Sec. 264.1086 and Sec. 265.1087 to clarify this 
    venting allowance.
    
    9. Closed-Vent Systems and Control Devices
    
        The final subpart CC standards added requirements for the 
    management of 
    
    [[Page 4910]]
    spent carbon removed from a carbon adsorption system used to comply 
    with the subpart AA, BB, and CC standards. The EPA is clarifying that 
    the carbon management requirements are only applicable to carbon that 
    is hazardous waste. Spent carbon is hazardous if it exhibits a 
    characteristic of hazardous waste or if it is listed. Spent carbon 
    deriving from the treatment of listed hazardous waste is considered to 
    be a type of listed waste by virtue of the derived from rule found at 
    Sec. 261.3(c)(2). See also 56 FR at 7200 (February 21, 1991).
        The EPA is amending the spent carbon management requirements of 
    Secs. 264.1033(m) and 265.1033(l), and paragraph (c)(3)(ii) of 
    Sec. 264.1087 and Sec. 265.1088 to clarify the intent described today. 
    The EPA is also revising Secs. 264.1033(m) and 265.1033(l) to allow 
    management of affected spent carbon to be conducted in certain interim 
    status units in addition to the permitted units specified in the 
    December 6, 1994 published rule.
    
    10. Inspection and Monitoring Requirements
    
        As published in the December 6, 1994 final rule, 
    Secs. 264.1033(k)(2) and 265.1033(j)(2) allowed that after the required 
    initial leak detection monitoring, an owner or operator is not required 
    to conduct annual monitoring on those closed-vent system components 
    which continuously operate in vacuum service. The EPA had intended that 
    this allowance apply to system components continuously operating under 
    negative pressure, because such systems would not release constituents 
    to the atmosphere even if there were a rupture or other loss of 
    integrity to the component (BID p. 6-100). However, the EPA specified 
    the term ``in vacuum service,'' which requires that a system operate at 
    an internal pressure at least 5 kPa below ambient pressure, under the 
    assumption that systems operating under negative pressure would meet 
    this requirement. The use of the term ``in vacuum service'' has 
    prompted several questions from the public asking EPA to clarify 
    whether systems operated under negative pressure, but not necessarily 
    in vacuum service, must be monitored annually after the initial leak 
    detection monitoring. The EPA had intended to not require annual 
    monitoring of closed-vent system components which operate under 
    pressure such that all emissions are routed to a control device even if 
    a leak or hole exists in the component. A component that continuously 
    operates under negative pressure would satisfy this intent, even if the 
    component does not necessarily operate in vacuum service. Therefore, 
    the EPA is amending Secs. 264.1033(k)(2) and 265.1033(j)(2) to specify 
    that, after the initial leak detection monitoring, an owner or operator 
    is not required to monitor system components which continuously operate 
    under negative pressure.
        As published in the December 6, 1994 standards, the reference in 
    paragraph (d) of Sec. 264.1088 and Sec. 265.1089 incorrectly specified 
    that certain control devices used to comply with the subpart CC 
    standards must be inspected and monitored in accordance with the 
    procedures specified in Sec. 264.1033(f). The EPA had intended that 
    this reference should be to Sec. 264.1033(f)(2). The EPA is amending 
    paragraph (d) in Sec. 264.1088 and Sec. 265.1089 to correct this 
    reference and to clarify the frequency of monitoring and the 
    requirement for corrective measures.
    
    11. Recordkeeping Requirements
    
        The EPA is amending Sec. 264.1089(a)(1) and Sec. 265.1090(a)(1) 
    such that these paragraphs correctly reference paragraph 265.1091(a) of 
    the alternative tank control requirements. The EPA is also amending 
    Sec. 264.1089(e) and Sec. 265.1090(e) such that these paragraphs 
    correctly specify recordkeeping requirements for a hazardous waste 
    incinerator and boiler or industrial furnace used to comply with the 
    treatment demonstration options in Sec. 264.1082 and Sec. 265.1083. 
    These amendments clarify references that were incorrectly printed in 
    the December 6, 1994 published standards (59 FR 62896).
    
    12. Reporting Requirements
    
        The EPA is amending Sec. 264.1090 (c) and (d) to clarify what 
    noncompliance occurrences for control device operations a facility 
    owner or operator must report to their Regional Administrator.
    
    13. Alternative Control Requirements for Tanks
    
        Paragraph 265.1091(a)(1)(i) of the final subpart CC standards 
    specifies filling requirements for a tank equipped with an internal 
    floating roof. The requirement is that when the roof is resting on the 
    leg supports, the process of filling, emptying, or refilling shall be 
    continuous and shall be accomplished as rapidly as possible. The intent 
    of this requirement is to minimize the time during which a vapor space 
    exists between the floating roof and the stored waste. EPA recognizes 
    that facility owners or operators may not have full control over the 
    amount and handling of waste transferred into their tanks, and this may 
    lead to periods when the filling of a tank may not be continuous. 
    Therefore, the EPA is clarifying this requirement to state that the 
    process of filling shall be as continuous as possible, based on the 
    amount of waste and the nature of the waste handling operation.
    
    14. Immediate Effective Date
    
        The EPA has determined to make today's action effective 
    immediately. The EPA believes that the corrections being made in this 
    document are either interpretations of existing regulations which do 
    not require prior notice and opportunity for comment, or are technical 
    corrections of obvious errors in the published rule (for example 
    corrections of regulatory language that is inconsistent with the 
    preamble, BID, or with otherwise clearly indicated EPA intent) for 
    which comment is unnecessary (within the meaning of 5 USC 
    553(b)(3)(B)). In addition, the EPA notes that many of these 
    clarifications result from the public comment obtained at various 
    public meetings regarding the subpart CC standards that were held 
    during the summer of 1995. Thus, the EPA has provided for a measure of 
    opportunity to comment.
        Docket. Five RCRA dockets contain information pertaining to today's 
    rulemaking: (1) RCRA docket number F-91-CESP-FFFFF, which contains 
    copies of all BID references and other information related to the 
    development of the rule up through proposal; (2) RCRA docket number F-
    92-CESA-FFFFF, which contains copies of the supplemental data made 
    available for public comment prior to promulgation; (3) RCRA docket 
    number F-94-CESF-FFFFF, which contains copies of all BID references and 
    other information related to development of the final rule following 
    proposal; (4) RCRA docket number F-94-CE2A-FFFFF, which contains 
    information pertaining to waste stabilization operations performed in 
    tanks; and (5) RCRA docket number F-95-CE3A-FFFFF, which contains 
    information about potential final rule revisions made available for 
    public comment. The public may review all materials in these dockets at 
    the EPA RCRA Docket Office.
        The EPA RCRA Docket Office is located at Crystal Gateway, 1235 
    Jefferson Davis Highway, First Floor, Arlington, Virginia. Hand 
    delivery of items and review of docket materials are made at the 
    Virginia address. The public must have an appointment to review docket 
    materials. Appointments can be scheduled by calling the Docket Office 
    at (703) 603-9230. The mailing address for the RCRA Docket Office is 
    RCRA 
    
    [[Page 4911]]
    Information Center (5305W), 401 M Street SW., Washington, DC 20460. The 
    Docket Office is open from 9 a.m. to 4 p.m., Monday through Friday, 
    except for Federal holidays.
    
    Legal Authority
    
        These regulations are amended under the authority of sections 2002, 
    3001-3007, 3010, and 7004 of the Solid Waste Disposal Act of 1970, as 
    amended by RCRA, as amended (42 U.S.C. 6921-6927, 6930, and 6974).
    
    List of Subjects
    
    40 CFR Part 262
    
        Environmental protection, Accumulation time, Air pollution control, 
    Container, Tank.
    
    40 CFR Parts 264 and 265
    
        Air pollution control, Container, Control device, Hazardous waste, 
    Incorporation by reference, Inspection, Miscellaneous unit, Monitoring, 
    Reporting and recordkeeping requirements, Standards, Surface 
    impoundment, Tank, TSDF, Waste determination.
    
    40 CFR Part 270
    
        Administrative practice and procedure, Air pollution control, 
    Confidential business information, Hazardous waste, Permit, Permit 
    modification, Reporting and recordkeeping requirements.
    
        Dated: December 18, 1995.
    Mary D. Nichols,
    Assistant Administrator for Air and Radiation.
    
        For the reasons set out in the preamble, title 40, chapter I, parts 
    262, 264, 265, 270, and 271 of the Code of Federal Regulations is 
    amended as follows:
    
    PART 262--STANDARDS APPLICABLE TO GENERATORS OF HAZARDOUS WASTE
    
        1. The authority citation for part 262 continues to read as 
    follows:
    
        Authority: 42 U.S.C. 6906, 6912(a), 6922, 6923, 6924, 6925, 6937 
    and 6938, unless otherwise noted.
    
    
    Sec. 262.34  [Amended]
    
        2. Section 262.34(a)(1)(i) is amended by inserting a comma after 
    ``subparts I'' to read ``subparts I, AA, BB and CC''.
    
    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. 6905, 6912(a), 6924 and 6925.
    
    Subpart B--General Facility Standards
    
        4. Section 264.13 is amended by revising paragraphs (b)(8) (i) and 
    (ii) to read as follows:
    
    
    Sec. 264.13  General waste analysis.
    
    * * * * *
        (b) * * *
        (8) * * *
        (i) If direct measurement is used for the waste determination, the 
    procedures and schedules for waste sampling and analysis, and the 
    results of the analysis of test data to verify the exemption.
        (ii) If knowledge of the waste is used for the waste determination, 
    any information prepared by the facility owner or operator or by the 
    generator of the hazardous waste, if the waste is received from off-
    site, that is used as the basis for knowledge of the waste.
    
    Subpart AA--Air Emission Standards for Process Vents
    
        5. In Sec. 264.1033 the second sentence of paragraph (a)(2) is 
    revised, paragraph (k)(2) is revised, and paragraph (m) is revised to 
    read as follows:
    
    
    Sec. 264.1033  Standards: Closed-vent systems and control devices.
    
        (a) * * *
        (2) * * * The controls must be installed as soon as possible, but 
    the implementation schedule may allow up to 30 months after the 
    effective date that the facility becomes subject to this subpart for 
    installation and startup. * * *
    * * * * *
        (k) * * *
        (2) Closed-vent systems shall be monitored to determine compliance 
    with this section during the initial leak detection monitoring, which 
    shall be conducted by the date that the facility becomes subject to the 
    provisions of this section, annually, and at other times as requested 
    by the Regional Administrator. For the annual leak detection monitoring 
    after the initial leak detection monitoring, the owner or operator is 
    not required to monitor those closed-vent system components which 
    continuously operate under negative pressure or those closed-vent 
    system joints, seams, or other connections that are permanently or 
    semi-permanently sealed (e.g., a welded joint between two sections of 
    metal pipe or a bolted and gasketed pipe flange).
    * * * * *
        (m) The owner or operator using a carbon adsorption system shall 
    document that all carbon removed that is a hazardous waste and that is 
    removed from a carbon adsorption system used to comply with 
    Sec. 264.1033(g) and Sec. 264.1033(h) is managed in one of the 
    following manners, regardless of the volatile organic concentration of 
    that carbon:
        (1) Regenerated or reactivated in a thermal treatment unit for 
    which the owner or operator has been issued a final permit under 40 CFR 
    part 270, and designs and operates the unit in accordance with the 
    requirements of subpart X of this part;
        (2) Incinerated in a hazardous waste incinerator for which the 
    owner or operator either:
        (i) Has been issued a final permit under 40 CFR part 270, and 
    designs and operates the unit in accordance with the requirements of 
    subpart O of this part; or
        (ii) Has certified compliance with the interim status requirements 
    of 40 CFR part 265, subpart O; or
        (3) Burned in a boiler or industrial furnace for which the owner or 
    operator either:
        (i) Has been issued a final permit under 40 CFR part 270, and 
    designs and operates the unit in accordance with the requirements of 40 
    CFR part 266, subpart H; or
        (ii) Has certified compliance with the interim status requirements 
    of 40 CFR part 266, subpart H.
    * * * * *
    
    Subpart CC--Air Emission Standards for Tanks, Surface Impoundments, 
    and Containers
    
    
    Sec. 264.1082  [Amended]
    
        6. In Sec. 264.1082 paragraph (c)(2)(iii) is amended by revising 
    ``removal rate (MR) for the process is greater'' to read ``removal rate 
    (MR) for the process is equal to or greater''.
        7. In Sec. 264.1082 paragraph (d) is amended by revising ``that is 
    not a hazardous waste but has an average VO concentration equal to or 
    greater than 100 ppmw shall'' to read ``that is a hazardous waste 
    shall''.
    
    
    Sec. 264.1083  [Amended]
    
        8. In Sec. 264.1083 paragraph (a)(1) is amended by revising 
    ``placed in waste management units'' to read ``placed in a waste 
    management unit''.
        9. In Sec. 264.1083 paragraph (b)(1) is amended by revising 
    ``placed in waste management units'' to read ``placed in a waste 
    management unit''.
        10. Section 264.1084 is amended by adding the following sentence to 
    the end of paragraph (b)(4), and revising paragraph (c) to read as 
    follows: 
    
    [[Page 4912]]
    
    
    
    Sec. 264.1084  Standards: Tanks.
    
    * * * * *
        (b) * * *
        (4) * * * To be considered a pressure tank for the purpose of 
    compliance with this subpart, a unit must operate with no detectable 
    emissions during filling to design capacity and the subsequent 
    compression of the vapor headspace.
    * * * * *
        (c) As an alternative to complying with paragraph (b) of this 
    section, an owner or operator may place hazardous waste in a tank 
    equipped with a cover (e.g., a fixed roof) meeting the requirements 
    specified in paragraph (c)(2) of this section when the hazardous waste 
    is determined to meet the conditions specified in paragraph (c)(1) of 
    this section.
        (1) All of the following conditions shall be met at all times that 
    hazardous waste is managed in the tank under normal process operations:
        (i) The hazardous waste in the tank is neither mixed, stirred, 
    agitated, nor circulated within the tank using a process that results 
    in splashing, frothing, or visible turbulent flow on the waste surface 
    during normal process operations;
        (ii) The hazardous waste in the tank is not heated by the owner or 
    operator except during conditions requiring that the waste be heated to 
    prevent the waste from freezing or to maintain adequate waste flow 
    conditions for continuing normal process operations;
        (iii) The hazardous waste in the tank is not treated by the owner 
    or operator using a waste stabilization process or a process that 
    produces an exothermic reaction; and
        (iv) The maximum organic vapor pressure of the hazardous waste in 
    the tank as determined using the procedure specified in 
    Sec. 264.1083(c) of this subpart is less than the following applicable 
    value:
        (A) If the tank design capacity is equal to or greater than 151 
    m3, then the maximum organic vapor pressure shall be less than 5.2 
    kPa;
        (B) If the tank design capacity is equal to or greater than 75 
    m3 but less than 151 m3, then the maximum organic vapor 
    pressure shall be less than 27.6 kPa; or
        (C) If the tank design capacity is less than 75 m3, then the 
    maximum organic vapor pressure shall be less than 76.6 kPa.
        (2) To comply with paragraph (c)(1) of this section, the owner or 
    operator shall design, install, operate, and maintain a cover to meet 
    the following requirements:
        (i) The cover and all cover openings (e.g. access hatches, sampling 
    ports, and gauge wells) shall be designed to operate with no detectable 
    organic emissions when all cover openings are secured in a closed, 
    sealed position.
        (ii) Each cover opening shall be secured in a closed, sealed 
    position (e.g. covered by a gasketed lid or cap) at all times that 
    hazardous waste is in the tank except as provided for in paragraphs 
    (c)(2)(iii), (f)(1), and (f)(2) of this section.
        (iii) One or more pressure relief devices which vent directly to 
    the atmosphere may be used on the cover provided that each device 
    remains in a closed, sealed position at all times except when tank 
    operating conditions require that the device open for the purpose of 
    preventing physical damage or permanent deformation of the tank or 
    cover in accordance with good engineering design practices and the 
    equipment manufacturer's recommendations. The device must be operated 
    to minimize organic air emissions to the atmosphere to the extent 
    practical, in consideration of good design and safety practices for 
    handling hazardous materials. Examples of such devices include 
    pressure-vacuum relief valves and conservation vents. Examples of tank 
    operating conditions that may require the pressure relief device to 
    open are filling and emptying of the tank, and internal pressure 
    changes caused by diurnal temperature changes.
    * * * * *
    
    
    Sec. 264.1084  [Amended]
    
        11. Section 264.1084(e) introductory text, is amended by revising 
    ``or other closed-systems, EPA considers a drain system that meets the 
    requirements of 40 CFR 61.346(a)(1) or 40 CFR 61.346(b)(1) through 
    (b)(3) to be a `closed systems''' to read ``or other closed systems for 
    the transfer of hazardous waste as described in paragraph (e)(1) or 
    (e)(2) of this section. The EPA considers a drain system that meets the 
    requirements of 40 CFR 61.346(a)(1) or 40 CFR 61.346(b)(1) through 
    (b)(3) to be a closed system.''
    
    
    Sec. 264.1085  [Amended]
    
        12. In Sec. 264.1085 paragraph (d) introductory text, is amended by 
    revising ``paragraph (b)(1)'' to read ``paragraph (b)''.
        13. In Sec. 264.1085 paragraph (f) introductory text, is amended by 
    revising ``or other closed-systems, EPA considers a drain system that 
    meets the requirements of 40 CFR 61.346(a)(1) or 40 CFR 61.346(b)(1) 
    through (b)(3) to be a `closed system''' to read ``or other closed 
    systems for the transfer of hazardous waste as described in paragraph 
    (f)(1) or (f)(2) of this section. The EPA considers a drain system that 
    meets the requirements of 40 CFR 61.346(a)(1) or 40 CFR 61.346(b)(1) 
    through (b)(3) to be a closed system.''
    
    
    Sec. 264.1086  [Amended]
    
        14. Section 264.1086(b)(1) is amended by revising ``as required by 
    paragraph (b)(2) to read ``in accordance with the requirements of 
    paragraph (b)(2)''.
        15. Section 264.1086 is amended by revising paragraph 
    (b)(2)(ii)(B), adding paragraph (b)(2)(ii)(C), revising paragraph 
    (b)(3) and revising paragraph (c) introductory text, to read as 
    follows:
    
    
    Sec. 264.1086  Standards: Containers.
    
        (b) * * *
        (2) * * *
        (ii) * * *
        (B) The enclosure may have permanent or temporary openings to allow 
    worker access; passage of containers through the enclosure by conveyor 
    or other mechanical means; entry of permanent mechanical or electrical 
    equipment; or to direct airflow into the enclosure.
        (C) The enclosure shall be designed and operated in accordance with 
    the criteria for a permanent total enclosure as specified in 
    ``Procedure T--Criteria for and Verification of a Permanent or 
    Temporary Total Enclosure'' in Appendix B of Sec. 52.741.
    * * * * *
        (3) Transfer of the waste into or from a container shall be 
    conducted in such a manner as to minimize waste exposure to the 
    atmosphere to the extent practical, considering good engineering and 
    safety practices for handling hazardous materials. Examples of 
    container loading procedures that the EPA considers to meet the 
    requirements of this paragraph include using a submerged-fill method to 
    load liquids into the container; using a vapor-balancing or a vapor-
    recovery system to collect and control the vapors displaced from the 
    container during filling operations; and transferring waste through a 
    conveyance tube that is fitted to a container opening above the liquid 
    level to splash-fill the material, and subsequently purging the 
    conveyance tube with gas prior to removing it from the container 
    opening.
        (c) Each container opening shall be maintained in a closed, sealed 
    position (e.g. covered by a gasketed lid) at all times that hazardous 
    waste is in the container except when it is necessary to have the 
    opening open during procedures to:
    * * * * *
        16. In Sec. 264.1087 paragraph (c)(3)(ii) is revised to read as 
    follows: 
    
    [[Page 4913]]
    
    
    
    Sec. 264.1087  Standards: Closed-vent systems and control devices.
    
    * * * * *
        (c) * * *
        (3) * * *
        (ii) All carbon that is a hazardous waste and that is removed from 
    the control device shall be managed in accordance with the requirements 
    of Sec. 264.1033(m) of this part, regardless of the VO concentration of 
    the carbon.
    * * * * *
        17. Section 264.1088 is amended by revising paragraph (d) to read 
    as follows:
    
    
    Sec. 264.1088  Inspection and monitoring requirements.
    
    * * * * *
        (d) Each control device used in accordance with the requirements of 
    Sec. 264.1087 of this subpart shall be inspected and monitored by the 
    owner or operator in accordance with the procedures specified in 
    Sec. 264.1033(f)(2) and Sec. 264.1033(i) of this part. The readings 
    from each monitoring device required by Sec. 264.1033(f)(2) shall be 
    inspected at least once each operating day to check control device 
    operation. Any necessary corrective measures should be immediately 
    implemented to ensure the control device is operated in compliance with 
    the requirements of Sec. 264.1087 of this subpart.
    * * * * *
    
    
    Sec. 264.1089  [Amended]
    
        18. Section 264.1089(a)(1) is amended by revising ``40 CFR 
    265.1091(c)'' to read ``40 CFR 265.1091(a)''.
        19. Section 264.1089(e) is amended by revising 
    ``Sec. 264.1082(c)(2)(v) or Sec. 264.1082(c)(2)(vi)'' to read 
    Sec. 264.1082(c)(2)(vi) or Sec. 264.1082(c)(2)(vii)''.
    
    
    Sec. 264.1090  [Amended]
    
        20. Section 264.1090(a) is amended by revising ``reoccurrence'' to 
    read ``recurrence''.
        21. Section 264.1090 is amended by revising the second sentence of 
    paragraph (c) and by revising paragraph (d) to read as follows:
    
    
    Sec. 264.1090  Reporting requirements.
    
        (a) * * *
        (c) * * * The report shall describe each occurrence during the 
    previous 6-month period when either:
        (1) A control device is operated continuously for 24 hours or 
    longer in noncompliance with the applicable operating values defined in 
    Sec. 264.1035(c)(4); or
        (2) A flare is operated with visible emissions for 5 minutes or 
    longer in a two-hour period, as defined in Sec. 264.1033(d). * * *
        (d) A report to the Regional Administrator in accordance with the 
    requirements of paragraph (c) of this section is not required for a 6-
    month period during which all control devices subject to this subpart 
    are operated by the owner or operator such that:
        (1) During no period of 24 hours or longer did a control device 
    operate continuously in noncompliance with the applicable operating 
    values defined in Sec. 264.1035(c)(4); and
        (2) No flare was operated with visible emissions for 5 minutes or 
    longer in a two-hour period, as defined in Sec. 264.1033(d).
        22. Section 264.1091 is amended by adding paragraph (a)(3) to read 
    as follows:
    
    
    Sec. 264.1091  Alternative control requirements for tanks.
    
        (a) * * *
        (3) The owner or operator may elect to comply with Sec. 264.1084 
    (b)(2) or (b)(3) of this subpart using an alternative means of emission 
    limitation as specified in 40 CFR 265.1091(a)(3).
    * * * * *
    
    PART 265--INTERIM STATUS STANDARDS FOR OWNERS AND OPERATORS OF 
    HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES
    
        23. The authority citation for part 265 continues to read as 
    follows:
    
        Authority: 42 U.S.C. 6905, 6912(a), 6924, 6925, and 6935.
    
    Subpart B--General Facility Standards
    
        24. Section 265.13 is amended by revising paragraph (b)(8)(i) and 
    (ii) to read as follows:
    
    
    Sec. 265.13  General waste analysis.
    
    * * * * *
        (b) * * *
        (8) * * *
        (i) If direct measurement is used for the waste determination, the 
    procedures and schedules for waste sampling and analysis, and the 
    results of the analysis of test data to verify the exemption.
        (ii) If knowledge of the waste is used for the waste determination, 
    any information prepared by the facility owner or operator or by the 
    generator of the hazardous waste, if the waste is received from off-
    site, that is used as the basis for knowledge of the waste.
    
    Subpart AA--Air Emission Standards for Process Vents
    
        25. In Sec. 265.1033 the second sentence of paragraph (a)(2) is 
    amended, paragraph (j)(2) is revised, and paragraph (l) is revised to 
    read as follows:
    
    
    Sec. 265.1033  Standards: Closed-vent systems and control devices.
    
    * * * * *
        (a) * * *
        (2) * * * The controls must be installed as soon as possible, but 
    the implementation schedule may allow up to 30 months after the 
    effective date that the facility becomes subject to this subpart for 
    installation and startup. * * *
    * * * * *
        (j) * * *
        (2) Closed-vent systems shall be monitored to determine compliance 
    with this section during the initial leak detection monitoring, which 
    shall be conducted by the date that the facility becomes subject to the 
    provisions of this section, annually, and at other times as requested 
    by the Regional Administrator. For the annual leak detection monitoring 
    after the initial leak detection monitoring, the closed-vent system 
    components which continuously operate under negative pressure or those 
    closed-vent system joints, seams, or other connections that are 
    permanently or semi-permanently sealed (e.g., a welded joint between 
    two sections of metal pipe or a bolted and gasketed pipe flange).
    * * * * *
        (l) The owner or operator using a carbon adsorption system shall 
    document that all carbon that is a hazardous waste and that is removed 
    from the control device is managed in one of the following manners, 
    regardless of the volatile organic concentration of the carbon:
        (1) Regenerated or reactivated in a thermal treatment unit for 
    which the owner or operator has been issued a final permit under 40 CFR 
    part 270, and designs and operates the unit in accordance with the 
    requirements of 40 CFR part 264 subpart X;
        (2) Incinerated in a hazardous waste incinerator for which the 
    owner or operator either:
        (i) Has been issued a final permit under 40 CFR part 270, and 
    designs and operates the unit in accordance with the requirements of 40 
    CFR part 264 subpart O; or
        (ii) Has certified compliance with the interim status requirements 
    of subpart O of this part; or
        (3) Burned in a boiler or industrial furnace for which the owner or 
    operator either:
        (i) Has been issued a final permit under 40 CFR part 270, and 
    designs and operates the unit in accordance with the 
    
    [[Page 4914]]
    requirements of 40 CFR part 266, subpart H; or
        (ii) Has certified compliance with the interim status requirements 
    of 40 CFR part 266, subpart H.
    * * * * *
    
    Subpart CC--Air Emission Standards for Tanks, Surface Impoundments, 
    and Containers
    
        26. Section 265.1081 is amended by revising the definition of 
    Cover, and adding a definition for Enclosure to read as follows:
    
    
    Sec. 265.1081  Definitions.
    
    * * * * *
        Cover means a device or system which is placed on or over a 
    hazardous waste to create an air-tight barrier between the entire 
    hazardous waste surface area and the space surrounding the unit, such 
    that air emissions to the atmosphere are reduced. A cover may have 
    openings such as access hatches, sampling ports, and gauge wells that 
    are necessary for operation, inspection, maintenance, or repair of the 
    unit on which the cover is installed provided that each opening is 
    closed and sealed when not in use. Examples of covers include a fixed 
    roof installed on a tank, a floating membrane cover installed on a 
    surface impoundment, and a lid installed on a drum.
        Enclosure means a structure that: (1) Surrounds a hazardous waste 
    management unit, captures organic vapors emitted from that unit, and 
    vents the vapors through a closed vent system to a control device; and 
    (2) is designed and operated in accordance with the criteria for a 
    permanent total enclosure as specified in ``Procedure T--Criteria for 
    and Verification of a Permanent or Temporary Total Enclosure'' in 
    Appendix B of Sec. 52.741.
    
    
    Sec. 265.1081  [Amended]
    
        27. In Sec. 265.1081, the definition of Waste determination is 
    amended by revising ``determining the organic reduction efficiency'' to 
    read ``the organic reduction efficiency'' and the definition of Waste 
    stabilization process is amended by adding the sentence ``This does not 
    include the adding of absorbent materials to the surface of a waste, 
    without mixing, agitation, or subsequent curing, to absorb free 
    liquid.'' to the end of the definition.
    * * * * *
    
    
    Sec. 265.1083  [Amended]
    
        28. In Sec. 265.1083 paragraph (c)(2)(iii) is amended by revising 
    ``removal rate (MR) for the process is greater'' to read ``removal rate 
    (MR) for the process is equal to or greater''.
    
    
    Sec. 265.1083  [Amended]
    
        29. In Sec. 265.1083 paragraph (d) is amended by revising ``that is 
    not a hazardous waste but has an average VO concentration equal to or 
    greater than 100 ppmw shall'' to read ``that is a hazardous waste 
    shall''.
        30. Section 265.1084 is amended by adding paragraph (a)(2)(iii), 
    revising paragraph (a)(5)(iv), introductory text, revising the equation 
    and the first definition in paragraph (a)(5)(v)(C), adding paragraph 
    (b)(2)(iii), revising paragraph (b)(4)(iv), introductory text, revising 
    the first sentence of paragraph (b)(6)(iii)(B), revising the 
    definitions of Qaj and Cbj in paragraph (b)(6)(iv), and 
    revising the first sentence of paragraph (c)(3)(i) to read as follows:
    
    
    Sec. 265.1084  Waste determination procedures.
    
        (a) * * *
        (2) * * *
        (iii) When the hazardous waste is generated as part of a batch 
    process that is not performed repeatedly, the owner or operator shall 
    perform a waste determination of the VO concentration of the waste in 
    the batch. The result of this waste determination is the average VO 
    concentration for that waste.
    * * * * *
        (5) * * *
        (iv) The following procedure shall be used to measure the VO 
    concentration for each discrete quantity of material identified in 
    paragraph (a)(5)(iii) of this section:
    * * * * *
        (v) * * *
        (C) * * *
        [GRAPHIC] [TIFF OMMITTED] TR09FE96.015
        
    where:
    
    C=Average VO concentration of the hazardous waste, at the point of 
    waste origination, ppmw.
    * * * * *
        (b) * * *
        (2) * * *
        (iii) When the hazardous waste is treated by a batch process that 
    is not performed repeatedly, the owner or operator shall perform a 
    waste determination for the treated waste in the batch. The result of 
    this waste determination is the average VO concentration for that 
    waste.
    * * * * *
        (4) * * *
        (iv) The following procedure shall be used to measure the VO 
    concentration for each discrete quantity of material identified in 
    paragraph (b)(4)(iii) of this section:
    * * * * *
        (6) * * *
        (iii) * * *
        (B) The VO concentration of each hazardous waste stream entering 
    the process (Cb) during the run shall be measured in accordance 
    with the requirements of paragraph (a)(5)(iv) of this section. * * *
        (iv) * * *
    Qaj = Mass quantity of hazardous waste exiting process during run 
    ``j'', kg/hr. * * *
    Cbj = Measured VO concentration of hazardous waste entering 
    process during run ``j'' as determined in accordance with the 
    requirements of Sec. 265.1084(a)(5)(iv), ppmw.
    * * * * *
        (c) * * *
        (3) * * *
        (i) Unless otherwise specified in the methods referenced in 
    paragraphs (c)(3)(ii) (A) through (E) of this section, a sufficient 
    number of samples, but no less than three samples, shall be collected 
    to represent the waste contained in the tank. * * *
    * * * * *
        31. Section 265.1085 is amended by adding the following sentence to 
    the end of paragraph (b)(4) and revising paragraph (c) to read as 
    follows:
    
    
    Sec. 265.1085  Standards: Tanks.
    
    * * * * *
        (b) * * *
        (4) * * * To be considered a pressure tank for the purpose of 
    compliance with this subpart, a unit must operate with no detectable 
    emissions during filling to design capacity and the subsequent 
    compression of the vapor headspace.
        (c) As an alternative to complying with paragraph (b) of this 
    section, an owner or operator may place hazardous waste in a tank 
    equipped with a cover (e.g., a fixed roof) meeting the requirements 
    specified in paragraph (c)(2) of this section when the hazardous waste 
    is determined to meet the conditions specified in paragraph (c)(1) of 
    this section.
        (1) All of the following conditions shall be met at all times that 
    hazardous waste is managed in the tank, during normal process 
    operations:
        (i) The hazardous waste in the tank is neither mixed, stirred, 
    agitated, nor circulated within the tank using a process that results 
    in splashing, frothing, or visible turbulent flow on the waste surface 
    during normal process operations;
        (ii) The hazardous waste in the tank is not heated by the owner or 
    operator 
    
    [[Page 4915]]
    except during conditions requiring that the waste be heated to prevent 
    the waste from freezing or to maintain adequate waste flow conditions 
    for continuing normal process operations;
        (iii) The hazardous waste in the tank is not treated by the owner 
    or operator using a waste stabilization process or a process that 
    produces an exothermic reaction; and
        (iv) The maximum organic vapor pressure of the hazardous waste in 
    the tank as determined using the procedure specified in 
    Sec. 265.1084(c) of this subpart is less than the following applicable 
    value:
        (A) If the tank design capacity is equal to or greater than 151 
    m3, then the maximum organic vapor pressure shall be less than 5.2 
    kPa;
        (B) If the tank design capacity is equal to or greater than 75 
    m3 but less than 151 m3, then the maximum organic vapor 
    pressure shall be less than 27.6 kPa; or
        (C) If the tank design capacity is less than 75 m3, then the 
    maximum organic vapor pressure shall be less than 76.6 kPa.
        (2) To comply with paragraph (c)(1) of this section, the owner or 
    operator shall design, install, operate, and maintain a cover to meet 
    the following requirements:
        (i) The cover and all cover openings (e.g. access hatches, sampling 
    ports, and gauge wells) shall be designed to operate with no detectable 
    organic emissions when all cover openings are secured in a closed, 
    sealed position.
        (ii) Each cover opening shall be secured in a closed, sealed 
    position (e.g., covered by a gasketed lid or cap) at all times that 
    hazardous waste is in the tank except as provided for in paragraphs 
    (c)(2)(iii), (f)(1), and (f)(2) of this section.
        (iii) One or more pressure relief devices which vent directly to 
    the atmosphere may be used on the cover provided that each device 
    remains in a closed, sealed position at all times except when tank 
    operating conditions require that the device open for the purpose of 
    preventing physical damage or permanent deformation of the tank or 
    cover in accordance with good engineering design practices and 
    manufacturers recommendations. The device must be operated to minimize 
    organic air emissions to the atmosphere to the extent practical, in 
    consideration of good design and safety practices for handling 
    hazardous materials. Examples of such devices include pressure-vacuum 
    relief valves and conservation vents. Examples of tank operating 
    conditions that may require the pressure relief device to open are 
    filling and emptying of the tank, and internal pressure changes caused 
    by diurnal temperature changes.
    * * * * *
    
    
    Sec. 265.1086  [Amended]
    
        32. Section 265.1086(d) is amended by revising ``paragraph (b)(1)'' 
    to read ``paragraph (b)''.
    
    
    Sec. 265.1087  [Amended]
    
        33. Section 265.1087(b)(1) is amended by revising ``as required by 
    paragraph (b)(2)'' to read ``in accordance with the requirements of 
    paragraph (b)(2)''.
        34. Section 265.1087 is amended by revising paragraph 
    (b)(2)(ii)(B), adding paragraph (b)(2)(ii)(C), revising paragraph 
    (b)(3) and revising paragraph (c), introductory text, to read as 
    follows:
    
    
    Sec. 265.1087  Standards: Containers.
    
    * * * * *
        (b) * * *
        (2) * * *
        (ii) * * *
        (B) The enclosure may have permanent or temporary openings to allow 
    worker access; passage of containers through the enclosure by conveyor 
    or other mechanical means; entry of permanent mechanical or electrical 
    equipment; or to direct airflow into the enclosure.
        (C) The enclosure shall be designed and operated in accordance with 
    the criteria for a permanent total enclosure as specified in 
    ``Procedure T--Criteria for and Verification of a Permanent of 
    Temporary Total Enclosure'' in Appendix B of Section 52.741.
    * * * * *
        (3) Transfer of the waste into or from a container shall be 
    conducted in such a manner as to minimize waste exposure to the 
    atmosphere to the extent practical, considering good engineering and 
    safety practices for handling hazardous materials. Examples of 
    container loading procedures that the EPA considers to meet the 
    requirements of this paragraph include using a submerged-fill method to 
    load liquids into the container; using a vapor-balancing or a vapor-
    recover system to collect and control the vapors displaced from the 
    container during filling operations; and transferring waste through a 
    conveyance tube that is fitted to a container opening above the liquid 
    level to splash-fill the material, and subsequently purging the 
    conveyance tube with gas prior to removing it from the container 
    opening.
        (c) Each container opening shall be maintained in a closed, sealed 
    position (e.g. covered by a gasketed lid) at all times that hazardous 
    waste is in the container except when it is necessary to have the 
    opening open during procedures to:
    * * * * *
        35. In Sec. 265.1088 paragraph (c)(3)(ii) is revised to read as 
    follows:
    
    
    Sec. 265.1088  Standards: Closed-vent systems and control devices.
    
    * * * * *
        (c) * * *
        (3) * * *
        (ii) All carbon that is a hazardous waste and that is removed from 
    the control device shall be managed in accordance with the requirements 
    of Sec. 264.1033(m) of this part, regardless of the VO concentration of 
    the carbon.
    * * * * *
        36. In Sec. 265.1089 paragraph (d) is revised to read as follows:
    
    
    Sec. 265.1089  Inspection and monitoring requirements.
    
    * * * * *
        (d) Each control device used in accordance with the requirements of 
    Sec. 265.1088 of this subpart shall be inspected and monitored by the 
    owner or operator in accordance with the procedures specified in 
    Sec. 265.1033(f)(2). The readings from each monitoring device required 
    by Sec. 265.1033(f)(2) shall be inspected at least once each operating 
    day to check control device operation. Any necessary corrective 
    measures should be immediately implemented to ensure the control device 
    is operated in compliance with the requirements of Sec. 265.1088 of 
    this subpart.
    * * * * *
    
    
    Sec. 265.1090  [Amended]
    
        37. Section 265.1090(a)(1) is amended by revising ``as listed in 
    Sec. 265.1091(c)'' to read ``as listed in Sec. 265.1091(a)''.
    
    
    Sec. 265.1090  [Amended]
    
        38. Section 265.1090(e) is amended by revising ``in accordance with 
    Sec. 265.1083(c)(2)(vi) or Sec. 265.1083(c)(2)(v)'' to read ``in 
    accordance with Sec. 265.1083(c)(2)(vi) or Sec. 265.1083(c)(2)(vii)''.
        39. In Sec. 265.1091 paragraph (a)(1)(i) is revised to read as 
    follows:
    
    
    Sec. 265.1091  Alternative tank control requirements.
    
        (a) * * *
        (1) * * *
        (i) The fixed roof shall comply with the requirements of 
    Sec. 265.1085(d)(1) of this subpart. The internal floating roof shall 
    rest or float on the waste surface (but not necessarily in complete 
    contact with it) inside a tank that has a fixed roof. The internal 
    floating roof shall be floating on the waste surface at all 
    
    [[Page 4916]]
    times, except during initial fill and during those intervals when the 
    tank is completely emptied or subsequently emptied and refilled. When 
    the roof is resting on the leg supports, the process of filling, 
    emptying, or refilling shall be as continuous as possible, based on the 
    amount of waste and the nature of the waste handling operation, and 
    shall be accomplished as rapidly as possible.
    * * * * *
    
    PART 270--EPA ADMINISTERED PERMIT PROGRAMS: THE HAZARDOUS WASTE 
    MANAGEMENT PROGRAM
    
        40. The authority citation for Part 270 continues to read as 
    follows:
    
        Authority: 42 U.S.C. 6905, 6912, 6925, 6927, 6939, and 6974.
    
    Subpart B--Permit Application
    
    
    Sec. 270.27  [Amended]
    
        41. Section 270.27(a)(1) is amended by revising ``as listed in 
    Sec. 265.1091(c)'' to read ``as listed in Sec. 265.1091(a)''.
    
    
    Sec. 270.27  [Amended]
    
        42. Section 270.27(a)(3) is amended by revising ``the specification 
    listed in Sec. 265.1087(b)(2)(ii)'' to read ``the specifications listed 
    in Sec. 264.1086(b)(2)(ii).''
    * * * * *
    [FR Doc. 96-1713 Filed 2-8-96; 8:45 am]
    BILLING CODE 6560-50-P
    
    

Document Information

Effective Date:
6/6/1996
Published:
02/09/1996
Department:
Environmental Protection Agency
Entry Type:
Rule
Action:
Final rule; technical amendment.
Document Number:
96-1713
Dates:
The rule provisions clarified by this action are effective as of June 6, 1996, the effective date of the final rule.
Pages:
4903-4916 (14 pages)
Docket Numbers:
IL-64-2-5807, FRL-5407-2
PDF File:
96-1713.pdf
CFR: (52)
40 CFR 265.1082(a)(2)(i)
40 CFR 265.1084(a)(5)(iv)
40 CFR 265.1084(b)(6)(iv)
40 CFR 261.3(c)(2)
40 CFR 265.1083(c)(2)
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