[Federal Register: May 1, 2006 (Volume 71, Number 83)]
[Proposed Rules]
[Page 25531-25544]
[DOCID:fr01my06-16]

=======================================================================
-----------------------------------------------------------------------

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 63

[EPA-HQ-OAR-2002-0021; FRL-8163-7]
RIN 2060-AM30

National Emission Standards for Hazardous Air Pollutants: Site
Remediation

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

-----------------------------------------------------------------------

SUMMARY: The EPA is proposing to amend the national emission standards
for hazardous air pollutants (NESHAP) for site remediation activities
that were promulgated on October 8, 2003, to control emissions of
hazardous air pollutants (HAP) from site remediation activities. We are
proposing to amend specific provisions to resolve issues and questions
subsequent to promulgation; correct technical omissions; and correct

typographical, cross-reference, and grammatical errors.

DATES: Comments. Comments on the proposed amendments must be received
on or before June 30, 2006.
    Public Hearing. If anyone contacts EPA requesting to speak at a
public hearing by May 22, 2006, a public hearing will be held on May
31, 2006.

ADDRESSES: Comments. Submit your comments, identified by Docket ID No.
EPA-HQ-OAR-2002-0021, by one of the following methods:
     http://www.regulations.gov. Follow the on-line

instructions for submitting comments.
     E-mail<EMAIL_ADDRESS>     By Facsimile:<PHONE_NUMBER>.
     Mail: Air and Radiation Docket, U.S. EPA, Mailcode 6102T,
1200 Pennsylvania Ave., NW., Washington, DC 20460. Please include a
total of two copies. The EPA requests a separate copy also be sent to
the contact person identified below (see FOR FURTHER INFORMATION
CONTACT).
     Hand Delivery: EPA Docket Center, Docket ID Number EPA-HQ-
OAR-2002-0021, EPA West Building, 1301 Constitution Ave., NW., Room
B102, Washington, DC, 20004. Such deliveries are accepted only during
the Docket's normal hours of operation and special arrangements should
be made for deliveries of boxed information.
    Instructions: Direct your comments to Docket ID No. EPA-HQ-OAR-
2002-0021. The EPA's policy is that all comments received will be
included in the public docket without change and may be made available
online at http://www.regulations.gov, including any personal

information provided, unless the comment includes information claimed
to be Confidential Business Information (CBI) or other information
whose disclosure is restricted by statute. Do not submit information
that you consider to be CBI or otherwise protected through
regulations.gov or e-mail. The http://www.regulations.gov Web site is

an ``anonymous access'' systems, which means EPA will not know your
identity or contact information unless you provide it in the body of
your comment. If you send an e-mail comment directly to EPA without
going through http://www.regulations.gov, your e-mail address will be

automatically captured and included as part of the comment that is
placed in the public docket and made available on the Internet. If you
submit an electronic comment, EPA recommends that you include your name
and other contact information in the body of your comment and with any
disk or CD-ROM you submit. If EPA cannot read your comment due to
technical difficulties and cannot contact you for clarification, EPA
may not be able to consider your comment. Electronic files should avoid
the use of special characters, any form of encryption, and be free of
any defects or viruses. For additional information about EPA's public
docket visit the EPA Docket Center homepage at http://www.epa.gov/epahome/dockets.htm
.

    Docket: All documents in the docket are listed in the http://www.regulations.gov
 index. Although listed in the index, some

information is not publicly available, e.g., CBI or other information
whose disclosure is restricted by statute. Certain other material, such
as copyrighted material, will be publicly available only in hard copy.
Publicly available docket materials are available either electronically
in http://www.regulations.gov or in hard copy at the Air and Radiation

Docket EPA/DC, EPA West, Room B102, 1301 Constitution Ave., NW.,
Washington, DC. The Public Reading Room is open from 8:30 a.m. to 4:30
p.m., Monday through Friday, excluding legal holidays. The telephone
number for the Public Reading Room is<PHONE_NUMBER>, and the telephone
number for the Air and Radiation Docket is<PHONE_NUMBER>.

FOR FURTHER INFORMATION CONTACT: Mr. Greg Nizich, Chemicals and
Coatings Group, Sector Policies and Programs Division (C439-03), U.S.
EPA, Research Triangle Park, NC 27711, telephone number<PHONE_NUMBER>,
facsimile number<PHONE_NUMBER>, electronic mail (e-mail) address:
<EMAIL_ADDRESS>

SUPPLEMENTARY INFORMATION:
    Entities Table. Entities potentially affected by this proposed
action include, but are not limited to, the following:

----------------------------------------------------------------------------------------------------------------
                   Category                        NAICS \1\             Examples of regulated entities
----------------------------------------------------------------------------------------------------------------
Industry......................................          325211  Site remediation activities at businesses at
                                                        325192   which materials containing organic HAP
                                                        325188   currently are or have been in the past stored,
                                                         32411   processed, treated, or otherwise managed at the
                                                         49311   facility. These facilities include: Organic
                                                         49319   liquid storage terminals, petroleum refineries,
                                                         48611   chemical manufacturing facilities, and other
                                                         42269   manufacturing facilities with co-located site
                                                         42271   remediation activities.
Federal Government............................  ..............  Federal agency facilities that conduct site
                                                                 remediation activities to clean up materials
                                                                 contaminated with organic HAP.
State/Local/Tribal Government.................  ..............  Tribal governments that conduct site remediation
                                                                 activities to clean up materials contaminated
                                                                 with organic HAP.
----------------------------------------------------------------------------------------------------------------
\1\ North American Industry Classification System (NAICS) code. Representative industrial codes at which site
  remediation activities have been or are currently conducted at some but not all facilities under a given code.
  The list is not necessarily comprehensive as to the types of facilities at which a site remediation cleanup
  may potentially be required either now or in the future.

    This table is not intended to be exhaustive, but rather provides a
guide for readers regarding entities likely to be regulated by this
action. This table lists the types of entities that we are now aware
could potentially be regulated by this action.
    A comprehensive list of NAICS codes cannot be compiled for
businesses or facilities potentially regulated by the rule due to the
nature of activities regulated by the source category. The industrial
code alone for a given facility does not determine whether the facility
is or is not potentially subject to the rule. The rule may be
applicable to any type of business or facility at which a site
remediation is conducted to clean up media contaminated with organic
HAP and other hazardous material. Thus, for many businesses and
facilities subject to the rule, the regulated sources (i.e., the site
remediation activities) are not the predominant activity, process,
operation, or service conducted at the facility. In these cases, the
industrial code indicates a primary product produced or service
provided at the facility rather than the presence of a site remediation
at the facility. For example,

NAICS code classifications where site remediation activities are
currently being performed at some but not all facilities include, but
are not limited to, petroleum refineries (NAICS code 32411), industrial
organic chemical manufacturing (NAICS code 3251xx), and plastic
materials and synthetics manufacturing (NAICS code 3252xx). However, we
are also aware of site remediation activities potentially subject to
the rule being performed at facilities listed under NAICS codes for
refuse systems, waste management, business services, miscellaneous
services, and nonclassifiable.
    To determine whether your facility is regulated by the action, you
should carefully examine the applicability criteria in the 40 CFR part
63, subpart GGGGG--National Emissions Standards for Hazardous Air
Pollutants: Site Remediation. If you have questions regarding the
applicability of this action to a particular entity, consult the person
listed in the preceding FOR FURTHER INFORMATION CONTACT section.
    WorldWide Web (WWW). Following the Administrator's signature, a
copy of the proposed amendments will be posted on the Technology
Transfer Network's (TTN) policy and guidance page for newly proposed or
promulgated rules at http://www.epa.gov/ttn/oarpg. The TTN provides

information and technology exchange in various areas of air pollution
control.
    Public Hearing. If a public hearing is requested, it will be held
at 10 a.m. at the EPA Facility Complex in Research Triangle Park, North
Carolina or at an alternate site nearby. Contact Mr. Greg Nizich at
919-541-3078 to request a hearing, to request to speak at a public
hearing, to determine if a hearing will be held, or to determine the
hearing location.
    Outline. The information presented in this preamble is organized as
follows:

I. Background
II. Proposed Amendments
    A. Short-Term Site Remediation Exemption
    B. Point of Determination of Remediation Material Volatile
Organic HAP (VOHAP) Concentration
    C. 1 Mg/yr Site Remediation Exemption
    D. Requirements for Remediation Material Transferred Off-Site
    E. Requirements for Equipment Leaks
    F. Applicability Determination for Remediation Activities at
Certain Oil and Natural Gas Production Facilities
    G. Other Rule Editorial Corrections
III. Statutory and Executive Order Reviews
    A. Executive Order 12866: Regulatory Planning and Review
    B. Paperwork Reduction Act
    C. Regulatory Flexibility Act
    D. Unfunded Mandates Reform Act
    E. Executive Order 13132: Federalism
    F. Executive Order 13175: Consultation and Coordination With
Indian Tribal Governments
    G. Executive Order 13045: Protection of Children From
Environmental Health and Safety Risks
    H. Executive Order 13211: Actions Concerning Regulations That
Significantly Affect Energy Supply, Distribution, or Use
    I. National Technology Transfer Advancement Act

I. Background

    We promulgated subpart GGGGG, National Emission Standards for
Hazardous Air Pollutants: Site Remediation, in 40 CFR part 63 on
October 8, 2003 (68 FR 58172). Subpart GGGGG applies to owners and
operators of facilities that are major sources of HAP emissions and
where a site remediation is conducted that meets the definitions and
conditions specified in the final rule. Certain types of site
remediations are explicitly exempted from being subject to the final
rule. Each site remediation subject to the final rule must meet the
emission limitation and work practice standards in subpart GGGGG that
apply to the source types (e.g., process vents, tanks, containers,
equipment components) used to perform or associated with the site
remediation activities.
    Since the promulgation of subpart GGGGG of 40 CFR part 63, we have
received questions about our interpretation of specific provisions in
the final rule. To clarify these issues, we decided that technical
amendments to the final rule are appropriate. Also, as part of today's
action, we are proposing to amend other rule language to correct
technical omissions, and to correct terminology, typographical,
printing, and grammatical errors that we have identified since
promulgation. The proposed amendments would not significantly change
our original projections for the final rule's compliance costs,
environmental benefits, burden on industry, or the number of affected
facilities.
    A petition for reconsideration for the final rule was filed by the
Sierra Club on December 8, 2003. The amendments proposed today do not
address any issues cited in the Sierra Club's petition. We are still
reviewing the items for reconsideration and will address them in a
future notice.

II. Proposed Amendments

    We are proposing to amend 40 CFR part 63, subpart GGGGG, to clarify
our intent for applying and implementing specific rule requirements and
to correct unintentional technical omissions and editorial errors. A
summary of the proposed amendments to the final rule and the rationale
for these amendments are presented below.

A. Short-Term Site Remediation Exemption

    Subpart GGGGG of 40 CFR part 63 provides an exemption for certain
short-term site remediations performed at facilities subject to the
final rule. Specifically, site remediations where the cleanup of a
contaminated area at the facility can be completed within 30
consecutive calendar days are exempted from the air emission control
requirements in subpart GGGGG. This exemption is included in the final
rule to facilitate the prompt cleanup of contamination resulting from
small spills or similar events where the facility owner or operator can
quickly complete the cleanup in a short period of time. Following
promulgation of the rule, we received requests to clarify how the 30-
day limit is implemented.
    As we discussed in the preamble to the final rule (68 FR 58185),
the time interval for this exemption is based on the time required to
complete those remediation activities that actually emit or have a
potential to emit HAP. Furthermore, this exemption applies to those
cleanups of contaminated areas that can reasonably be completed within
a period much shorter than 30 days (e.g., several days, 1 to 2 weeks).
We chose the 30-day interval specified in the final rule in
consideration of those situations where a cleanup at a particular site
that normally should be completed within several days or a week takes
longer to complete because factors beyond the control of the owner or
operator temporarily suspend or delay the remediation activities (such
as severe weather or unexpected machinery breakdowns). Therefore, we
decided that selecting a maximum of 30 days for the short-term site
remediation exemption allows a sufficient extended period to complete
cleanups that experience unavoidable delays and provides a reasonable
time buffer to account for any unforeseen circumstances that may
develop at a site.
    It is our intention that the short-term site remediation exemption
only applies to those cleanups where all associated activities can be
completed within 30 days (including any off-site treatment of the
remediation materials) such that the organic HAP constituents in all of
the remediation material resulting from the cleanup of the contaminated
area no longer have a reasonable potential for volatilizing and being
released to the atmosphere. In other words, we do not

consider simply shipping the remediation material generated by the
cleanup to another site by the 30th day as complying with the
exemption's intended scope. Materials containing organic HAP that are
shipped off-site may still have the potential for the organics to
volatilize and, consequently, be released to the atmosphere. Unless
properly treated or disposed of, the action of shipping the remediation
materials to an off-site location effectively just moves the HAP
emissions point to another location and extends the time available for
the organic HAP to be emitted.
    We are proposing to amend 40 CFR 63.7884 to clarify the final rule
language with respect to our intent for application of the short-term
remediation exemption, including those situations when the remediation
material is transferred off-site. The proposed amendment language would
explicitly define the beginning and end of the 30-day exemption period.
Within this 30-day period, regardless of the location where the
treatment or disposal occurs (i.e., either on-site or at another
facility), final treatment or disposal of all remediation material
generated during the cleanup would need to be completed.
    The first day of the 30-day exemption period would be defined as
the day on which you initiate any action that removes, destroys,
degrades, transforms, immobilizes, or otherwise manages the remediation
materials. Consistent with the exemption under the existing rule, the
following activities, when completed before beginning this initial
action, would not be counted as part of the 30-day period: Activities
to characterize the type and extent of the contamination by collecting
and analyzing samples; activities to obtain permits from Federal,
State, or local authorities to conduct the site remediation; activities
to schedule workers and necessary equipment; and activities to arrange
for contractor or third party assistance in performing the site
remediation.
    The last day of the exemption period would be defined as the day on
which all of the remediation materials generated by the cleanup have
been treated or disposed of (either at the cleanup site or another
site) in a manner such that the organic HAP in the material no longer
have a reasonable potential for volatilizing and being released to the
atmosphere. This means the final treatment or disposal of all of the
remediation material must be completed within the 30-day period
following initiation of the cleanup. A site remediation where the only
activities completed are excavating or otherwise removing the
contaminated material, and then storing this material (e.g., in waste
piles, tanks, or containers) during the 30-day period does not qualify
for the exemption. In this case, the processes and equipment used for
site remediation would need to meet the applicable emissions
limitations and work practice standards in the final rule (unless the
site remediation qualifies for another exemption allowed under the
final rule).
    Similarly, simply shipping all the remediation material off-site by
the 30th day does not meet the conditions of the exemption. If the
remediation materials generated by a cleanup are shipped off-site for
treatment or disposal, then the owner or operator would be required to
complete the transfer of all of the materials to a facility where these
materials would be treated or disposed of within the 30-day period such
that the organic HAP constituents in the materials no longer have a
reasonable potential for volatilizing and subsequent release to the
atmosphere. In situations when the off-site treatment or disposal of
the remediation material cannot be completed within the 30-day period,
then the remediation material is subject to 40 CFR 63.7936 of subpart
GGGGG which specifies the requirements you must meet when you transfer
remediation material off-site.

B. Point of Determination of Remediation Material Volatile Organic HAP
(VOHAP) Concentration

    Subpart GGGGG of 40 CFR part 63 establishes standards to control
organic HAP emissions from certain remediation material management
units (i.e., tanks, surface impoundments, containers, oil/water
separators, organic/water separators and transfer systems) used for
remediation activities. The final rule requires that those units
managing remediation material with an average VOHAP concentration equal
to or greater than 500 parts per million by weight (ppmw), meet the
applicable emission limitation and work practice standards for the
remediation material management unit specified in the rule. If the
VOHAP concentration of the material is less than 500 ppmw, then the
remediation material management units handling this material are not
required to meet the air emission control requirements in subpart
GGGGG. The VOHAP concentration is based on the organic HAP content of
the remediation material determined by either direct measurement of
samples of the remediation material or through use of knowledge of the
remediation material (i.e., application of the owner's or operator's
expertise using appropriate information regarding the remediation
material).
    As promulgated, subpart GGGGG of 40 CFR part 63 requires the VOHAP
concentration for the remediation material to be determined at the
``point-of-extraction.'' This term is defined to be a point above
ground where you can collect samples of a remediation material before,
or at the first point where, organic constituents in the material have
the potential to volatilize and be released to the atmosphere, and (in
all instances) before placing the material in a remediation material
management unit.
    This point of determination is different from the definition we
originally proposed for subpart GGGGG of 40 CFR part 63. In the
proposed rule, the VOHAP concentration of the remediation material was
specified to be determined at a point prior to, or within, a
remediation material management unit, provided that organic
constituents in the material have not been allowed to volatilize and be
released to the atmosphere. This approach was discussed in the preamble
to the proposed rule (67 FR 49408) and proposed in 40 CFR
63.7882(c)(4)(i) and 40 CFR 63.7912(a). We proposed this approach
because it simplifies the determination procedure for the wide variety
of treatment and management processes that can be used for site
remediation activities.
    The approach addresses situations not only when there is a single
remediation material stream, but also those situations when there are
two or more combined material streams (either only remediation
materials or remediation materials with non-remediation materials). If
a single material stream (or combination of streams) having a VOHAP
concentration of 500 ppmw or greater is managed in a remediation
material management unit, then the unit is subject to the air emission
control requirements for the particular unit, as specified in the final
rule. If at a further downstream point, the VOHAP concentration of the
material falls below the 500 ppmw action level following treatment, the
material no longer needs to be managed in units that meet the
applicable air emission control requirements in subpart GGGGG of 40 CFR
part 63 (however, these units would still need to comply with any
applicable control under other Federal or State air rules). Similarly,
if the VOHAP concentration of a remediation material through processing
or other means is increased in a remediation material management unit
to a level at or greater than the 500 ppmw action

level, that unit will need to use the appropriate controls specified in
subpart GGGGG.
    We received no adverse public comment on the proposed approach. We
did, however, receive unrelated adverse public comments stating that
the format we used for the proposed rule (e.g., reliance on presenting
many rule requirements in an exclusively tabular format and extensive
cross-referencing to provisions in other subparts in 40 CFR part 63)
made the rule difficult to read and understand. In response to these
comments, we significantly revised the editorial format and
organization of the final rule. In doing so, the rule language we
proposed designating the point where the VOHAP concentration of a
remediation material is to be determined for the purpose of identifying
those remediation material management units not subject to the rule's
air emission control requirements (i.e., units managing remediation
material having a VOHAP concentration less than the 500 ppmw action
level) was unintentionally misstated when we converted this provision
to the new format and wording used for the final rule.
    Today's proposed amendments would correct our error by amending the
language in subpart GGGGG of 40 CFR part 63 regarding the point where
the VOHAP concentration of remediation material is determined, and
reinstate the same regulatory approach and language that we used for
the proposed rule. This regulatory language would be placed in the
appropriate sections of the reformatted final version of subpart GGGGG
with appropriate adjustments of terminology and section cross-
references consistent with the final rule structure.
    In addition, today's proposed amendments would remove the term
``point-of-extraction'' in the final rule since the term no longer is
needed to implement any provision of subpart GGGGG of 40 CFR part 63
and would specify that you determine the average total VOHAP
concentration of the remediation material at a point prior to or within
a remediation material management unit. The applicable regulatory
language under the procedures in 40 CFR 63.7943 for determining average
VOHAP concentration of a remediation material would also be revised
using the original proposal language to the fullest extent possible
under the format of the final rule. Thus, we would be implementing our
intended approach for determining the VOHAP concentration of the
remediation material. Under today's proposed amendments (consistent
with our original proposal), once the VOHAP concentration for a
remediation material has been determined to be less than 500 ppmw, all
remediation material management units downstream from the point of
determination managing this material would no longer be required to
meet the air emission control requirements in subpart GGGGG unless a
remediation process is used that concentrates all, or part of, the
remediation material being managed in the unit such that the VOHAP
concentration of the material increases to 500 ppmw or more (e.g.,
free-product separation).

C. 1 Mg/yr Site Remediation Exemption

    An applicability exemption is provided in 40 CFR 63.7881(c) for a
facility that is a major source of HAP and is subject to another
subpart under 40 CFR part 63, but where the annual quantity of organic
HAP in the materials generated by the site remediations conducted at
the facility is less than 1 megagram per year (Mg/yr). Facilities at
which the site remediation activities qualify for this exemption are
not subject to the final rule except for recordkeeping requirements.
The owner or operator is required to maintain records documenting that
the total quantity of the organic HAP in the remediation materials
generated by site remediations at the facility is less than 1 Mg/yr.
This section of the final rule has been wrongly interpreted by some to
mean that the 1 Mg/yr limit is applied on an individual site
remediation basis. By this interpretation, at a facility where two site
remediations are conducted in a year, each site remediation would be
allowed to generate remediation materials having total organic HAP
content up to 1 Mg/yr resulting in a facilitywide total of 2 Mg/yr,
which is not what we intended. This is not how the exemption provisions
are to be applied to a facility.
    The 1 Mg/yr limit for the exemption is applied on a facilitywide
basis. As we stated in the proposal (67 FR 49406), the exemption
applies to a facility for which the owner or operator demonstrates that
the total annual organic HAP mass content of the remediation material
cleaned up at a facility is less than 1 Mg/yr. The mass limit is based
on the total organic HAP content of the remediation material at the
facility, not the material from an individual site remediation at the
facility. There is no restriction on the number of site remediations
for which the exemption applies so long as the total organic HAP amount
in the remediation materials generated by all of the site remediations
conducted at the facility during a year is less than 1 Mg/yr.
    To clarify the final rule language with respect to how the small-
quantity remediation exemption is to be applied, we are proposing
amended language for 40 CFR 63.7881(c). This language would not change
how the 1 Mg/yr limit applies nor change the documentation requirements
for the exemption now in the final rule, but simply and more explicitly
state that the 1 Mg/yr limit applies on a facilitywide, calendar-year
basis, and that there is no restriction of the number of site
remediations under the exemption.

D. Requirements for Remediation Material Transferred Off-Site

    The requirements for owners and operators transferring remediation
material, having an average VOHAP concentration of 10 ppmw or greater,
to an off-site facility are specified in 40 CFR 63.7936 of subpart
GGGGG. This section has been incorrectly interpreted by some to mean
that any remediation material transferred off-site with a VOHAP
concentration at or above the 10 ppmw action level has some treatment
obligation under subpart GGGGG. While we are not proposing to amend the
existing language in 40 CFR 63.7936, we are including an explanation
here to clarify how the 10 ppmw action level in 40 CFR 63.7936 is
applied to remediation material transferred off-site.
    The 10 ppmw VOHAP concentration action level in 40 CFR 63.7936 is
not used to determine applicability of emissions control or work
practice standards under subpart GGGGG of 40 CFR part 63. Rather, the
10 ppmw VOHAP concentration action level is specified because, at or
above that VOHAP concentration, some action may be required by both the
transferring facility and receiving facility, but further evaluation is
needed to be certain if any action is required. If the VOHAP
concentration of the transferred remediation material is less than 10
ppmw, there are no requirements under subpart GGGGG of 40 CFR part 63
regarding the off-site transfer and subsequent management of this
material. However, if the VOHAP concentration of the transferred
remediation material is 10 ppmw or greater, then there are
recordkeeping, notification, and possibly air emission control
requirements (depending on how the material is managed at the receiving
facility) under subpart GGGGG of 40 CFR part 63 that must be met.
    The determination of which air emission control requirements in
subpart GGGGG of 40 CFR part 63 apply to, or follow, the transferred

remediation material to the receiving facility is based on other action
levels in the final rule that are specifically applied to the affected
sources regardless of the source location (i.e., the 10 ppmw action
level for process vents in 40 CFR 63.7885 and the 500 ppmw action level
for remediation material management units in 40 CFR 63.7886). In cases
where transferred remediation material, having an average VOHAP
concentration of 10 ppmw or greater, is treated or managed at the
receiving facility in vented processes that would be affected sources
under subpart GGGGG if located at the transferring facility (40 CFR
63.7882(a)(1)), then these processes must comply with the air emission
control requirements for process vents in the final rule (40 CFR
63.7885).
    In cases where transferred remediation material having an average
VOHAP concentration of 500 ppmw or greater is treated or managed at the
receiving facility in remediation material management units that would
be affected sources under subpart GGGGG (40 CFR 63.7882(a)(2)), these
units must comply with the applicable air emission control requirements
in the final rule (40 CFR 63.7886). If instead the average VOHAP
concentration of the transferred remediation material placed in these
remediation material management units at the receiving facility is 10
ppmw or greater but less than 500 ppmw, then the units are not required
to meet the air emission control requirements in subpart GGGGG. The
only requirement is to document why the transferred remediation
material is not subject to the air emission control requirements in
subpart GGGGG (i.e., the VOHAP concentration of the material is below
the 500 ppmw action level).

E. Requirements for Equipment Leaks

    The general standards in subpart GGGGG of 40 CFR part 63 for
process vents and for remediation material management units provide
owners and operators an alternative compliance option for those units
that are already using air pollution controls to comply with another
subpart under 40 CFR part 61 or 40 CFR part 63. Under this option, your
unit is not subject to air emission control requirements in subpart
GGGGG if the unit is controlled in compliance with the standards
specified in the applicable subpart of 40 CFR part 61 or 40 CFR part
63. This means the unit meets all applicable emissions limitations and
work practice standards under the other subpart (e.g., you install and
operate the required air emission control devices or have implemented
the required work practice to reduce HAP emissions to levels specified
by the applicable subpart). This provision only applies if the other
subpart actually specifies a standard requiring control of HAP
emissions from your affected process vents. It does not apply to any
exemption of the affected source from using air pollution controls
allowed by the other applicable subpart. This compliance option under
subpart GGGGG was included in the proposed rule for both process vents
and remediation material management units. We received no adverse
public comments on allowing this compliance option.
    The general standards in subpart GGGGG of 40 CFR part 63 do not
include a comparable compliance option for those affected equipment
leak sources associated with a site remediation that are already using
air pollution controls to comply with another subpart under 40 CFR part
61 or 40 CFR part 63. There is no reason not to extend the same
compliance option that subpart GGGGG allows for process vents and
remediation material management units to equipment leak sources. The
exclusion of this type of compliance option under the general standards
for equipment leaks from the final rule was an oversight on our part.
Therefore, the proposed amendments would add to the general standards
for equipment leaks in 40 CFR 63.7887 a compliance option for those
affected equipment leak sources that are already using air pollution
controls or work practices to comply with another subpart under 40 CFR
part 61 or 40 CFR part 63. The proposed regulatory language for this
option effectively is the same (with minor wording changes appropriate
to equipment leak sources) as used in the final rule for process vents
and for remediation material management units that are already using
air pollution controls to comply with another subpart under 40 CFR part
61 or 40 CFR part 63.

F. Applicability Determination for Remediation Activities at Certain
Oil and Natural Gas Production Facilities

    Since promulgation of the final rule, we have been notified that
provisions in the Clean Air Act (CAA) providing special consideration
for activities located at certain oil and natural gas production field
facilities were not incorporated into the Site Remediation NESHAP.
These provisions, under section 112(n)(4)(A) of the CAA, have resulted
in incorporation of regulatory text in other regulations that often
apply to oil and natural gas production field facilities such as the
Oil and Natural Gas Production NESHAP. These provisions were not
accounted for in the Site Remediation NESHAP proposed on July 30, 2002.
In addition, the issue was not raised by commenters on the proposed
rule and, as a result, the final rule does not treat emissions at oil
and natural gas production fields differently from those at any other
location. Since we believe regulations must be consistent with the CAA,
we are proposing amendments to the applicability provisions of the Site
Remediation NESHAP to further that outcome. Section 112(n)(4)(A)
states:

    Notwithstanding the provisions of subsection (a) of this
section, emissions from any oil or gas exploration or production
well (with its associated equipment) and emissions from any pipeline
compressor or pump station shall not be aggregated with emissions
from other similar units, whether or not such units are in a
contiguous area or under common control, to determine whether such
units or stations are major sources, and in the case of any oil and
gas exploration or production well (with its associated equipment),
such emissions shall not be aggregated for any purpose under this
section.

    In the Oil and Natural Gas Production NESHAP, 40 CFR part 63
subpart HH, we address the provisions of section 112(n)(4)(A) by
limiting the emission points that can be aggregated in the major source
determination process at production field facilities. In order to be
consistent with both the Oil and Natural Gas Production NESHAP, and
section 112 of the CAA, we are proposing amendments to the Site
Remediation NESHAP to limit emissions aggregation for major source
status determination at production field facilities only, to glycol
dehydration units, storage vessels with flash emission potential and
site remediation activities. The terms ``production field facility,''
``glycol dehydration unit,'' and ``storage vessel with the potential
for flash emissions'' are all defined terms under the Oil and Natural
Gas Production NESHAP (40 CFR 63.761) and will be referenced under the
proposed amendments to the Site Remediation NESHAP.

G. Other Rule Editorial Corrections

    Table 1 to subpart GGGGG of 40 CFR part 63 lists the specific
organic chemical compounds, isomers, and mixtures that are HAP for
purposes of implementing the requirements of subpart GGGGG. The version
of table 1 to subpart GGGGG published in October 2003 inadvertently
included a listing for the compound 1,1-dimethyl hydrazine that we
stated in the preamble for the final rule should not have been listed
in the table (68 FR 58175). The proposed

amendments would replace table 1 to subpart GGGGG with the correct
version of the table excluding the listing for 1,1-dimethyl hydrazine.
    Amendments to the regulatory language throughout 40 CFR part 63,
subpart GGGGG, are proposed to correct terminology, typographical,
section cross-reference, or grammatical errors. These amendments would
not change any of the technical or administrative requirements of the
final rule.

III. Statutory and Executive Order Reviews

A. Executive Order 12866: Regulatory Planning and Review

    Under Executive Order 12866, (58 FR 51735, October 4, 1993) we must
determine whether the regulatory action is ``significant'' and,
therefore, subject to OMB review and the requirements of the Executive
Order. The Order defines ``significant regulatory action'' as one that
is likely to result in a rule that may:
    (1) Have an annual effect on the economy of $100 million or more or
adversely affect in a material way the economy, a sector of the
economy, productivity, competition, jobs, the environment, public
health or safety, or State, local, or tribal governments or
communities;
    (2) Create a serious inconsistency or otherwise interfere with an
action taken or planned by another agency;
    (3) Materially alter the budgetary impact of entitlements, grants,
user fees, or loan programs or the rights and obligations of recipients
thereof; or
    (4) Raise novel legal or policy issues arising out of legal
mandates, the President's priorities, or the principles set forth in
the Executive Order.''
    Pursuant to the terms of Executive Order 12866, OMB has notified
EPA that it considers this action a ``significant regulatory action''
within the meaning of the Executive Order. The EPA submitted this
action to OMB for review. Changes made in response to OMB suggestions
or recommendations will be documented in the public record.

B. Paperwork Reduction Act

    This action does not impose any new information collection burden.
The proposed amendments would result in no changes to the information
collection requirements of the existing rule. OMB has previously
approved the information collection requirements contained in 40 CFR
part 63, subpart GGGGG, under the provisions of the Paperwork Reduction
Act, 44 U.S.C. 3501 et seq., and has assigned OMB control number 2060-
0534, EPA ICR number 2062.02. A copy of the OMB approved Information
Collection Request (ICR) may be obtained from Susan Auby; Collection
Strategies Division; U.S. EPA (2822T); 1200 Pennsylvania Ave., NW.;
Washington, DC 20460 or by calling<PHONE_NUMBER>.
    Burden means the total time, effort, or financial resources
expended by persons to generate, maintain, retain, or disclose or
provide information to or for a Federal agency. This includes the time
needed to review instructions; develop, acquire, install, and utilize
technology and systems for the purposes of collecting, validating, and
verifying information, processing and maintaining information, and
disclosing and providing information; adjust the existing ways to
comply with any previously applicable instructions and requirements;
train personnel to be able to respond to a collection of information;
search data sources; complete and review the collection of information;
and transmit or otherwise disclose the information.
    An agency may not conduct or sponsor, and a person is not required
to respond to a collection of information unless it displays a
currently valid OMB control number. The OMB control numbers for EPA's
regulations in 40 CFR are listed in 40 CFR part 9.

C. Regulatory Flexibility Act

    The Regulatory Flexibility Act (RFA) generally requires an agency
to prepare a regulatory flexibility analysis of any rule subject to
notice and comment rulemaking requirements under the Administrative
Procedure Act or any other statute unless the agency certifies that the
rule will not have a significant economic impact on a substantial
number of small entities. Small entities include small businesses,
small organizations, and small governmental jurisdictions.
    For purposes of assessing the impacts of today's proposed rule
amendments on small entities, small entity is defined as: (1) A small
business as defined by the Small Business Administration's (SBA)
regulations at 13 CFR 121.201; (2) a small governmental jurisdiction
that is a government of a city, county, town, school district or
special district with a population of less than 50,000; and (3) a small
organization that is any not-for-profit enterprise which is
independently owned and operated and is not dominant in its field.
    After considering the economic impacts of today's proposed rule
amendments on small entities, I certify that this action will not have
a significant economic impact on a substantial number of small
entities. The small entities that may be directly regulated by the
proposed rule include small businesses and small governmental
jurisdictions. We have determined that there would be little or no
impact on any affected small entities because the proposed rule
amendments would amend existing regulations to clarify specific
provisions and to correct technical omissions and editorial errors. We
continue to be interested in the potential impacts of the proposed rule
amendments on small entities and welcome comments on issues related to
such impacts.

D. Unfunded Mandates Reform Act

    Title II of the Unfunded Mandates Reform Act of 1995 (UMRA), Public
Law 104-4, establishes requirements for Federal agencies to assess the
effects of their regulatory actions on State, local, and tribal
governments and the private sector. Under section 202 of the UMRA, EPA
generally must prepare a written statement, including a cost-benefit
analysis, for proposed and final rules with ``Federal mandates'' that
may result in expenditures to State, local, and tribal governments, in
the aggregate, or to the private sector, of $100 million or more in any
one year. Before promulgating an EPA rule for which a written statement
is needed, section 205 of the UMRA generally requires EPA to identify
and consider a reasonable number of regulatory alternatives and adopt
the least costly, most cost-effective or least burdensome alternative
that achieves the objectives of the rule. The provisions of section 205
do not apply when they are inconsistent with applicable law. Moreover,
section 205 allows EPA to adopt an alternative other than the least
costly, most cost-effective or least burdensome alternative if the
Administrator publishes with the final rule an explanation why that
alternative was not adopted. Before EPA establishes any regulatory
requirements that may significantly or uniquely affect small
governments, including tribal governments, it must have developed under
section 203 of the UMRA a small government agency plan. The plan must
provide for notifying potentially affected small governments, enabling
officials of affected small governments to have meaningful and timely
input in the development of EPA regulatory proposals with significant
Federal intergovernmental mandates, and informing, educating, and
advising small governments on compliance with the regulatory
requirements.
    Today's proposed rule amendments contain no Federal mandates (under
the regulatory provisions of Title II of the UMRA) for State, local, or
tribal

governments or the private sector. The proposed rule amendments do not
contain a Federal mandate that may result in expenditures of $100
million or more for State, local, and tribal governments, in the
aggregate, or the private sector in any 1 year. Thus, the proposed rule
amendments are not subject to the requirements of section 202 and 205
of the UMRA. In addition, the proposed rule amendments contain no
regulatory requirements that might significantly or uniquely affect
small governments because the burden is small and the regulation does
not unfairly apply to small governments. Therefore, the proposed rule
amendments are not subject to the requirements of section 203 of the
UMRA.

E. Executive Order 13132: Federalism

    Executive Order 13132, entitled ``Federalism'' (64 FR 43255, August
10, 1999), requires EPA to develop an accountable process to ensure
``meaningful and timely input by State and local officials in the
development of regulatory policies that have federalism implications.''
``Policies that have federalism implications'' is defined in the
Executive Order to include regulations that have ``substantial direct
effects on the States, on the relationship between the national
government and the States, or on the distribution of power and
responsibilities among the various levels of government.''
    The proposed rule amendments do not have federalism implications.
Today's action will not have substantial direct effects on the States,
on the relationship between the national government and the States, or
on the distribution of power and responsibilities among the various
levels of government, as specified in Executive Order 13132. The
proposed rule amendments would amend existing regulations to clarify
specific provisions in the existing regulations and to correct
technical omissions and editorial errors. Thus, Executive Order 13132
does not apply to this action.
    In the spirit of Executive Order 13132, and consistent with EPA
policy to promote communications between EPA and State and local
governments, EPA specifically solicits comment on the proposed rule
amendments from State and local officials.

F. Executive Order 13175: Consultation and Coordination With Indian
Tribal Governments

    Executive Order 13175, entitled ``Consultation and Coordination
with Indian Tribal Governments'' (65 FR 67249, November 9, 2000),
requires EPA to develop an accountable process to ensure ``meaningful
and timely input by tribal officials in the development of regulatory
policies that have tribal implications.'' The proposed rule amendments
do not have tribal implications, as specified in Executive Order 13175.
Today's action will not have substantial direct effects on tribal
governments, on the relationship between the Federal government and
Indian tribes, or on the distribution of power and responsibilities
between the Federal government and Indian tribes. Thus, Executive Order
13175 does not apply to the proposed rule amendments.

G. Executive Order 13045: Protection of Children From Environmental
Health and Safety Risks

    Executive Order 13045 (62 FR 19885, April 23, 1997) applies to any
rule that: (1) Is determined to be ``economically significant'' as
defined under Executive Order 12866, and (2) concerns an environmental
health or safety risk that EPA has reason to believe may have a
disproportionate effect on children. If the regulatory action meets
both criteria, the Agency must evaluate the environmental health or
safety effects of the planned rule on children, and explain why the
planned regulation is preferable to other potentially effective and
reasonably feasible alternatives considered by the Agency.
    The proposed rule is not subject to the Executive Order because it
is not economically significant as defined under Executive Order 12866,
and because EPA interprets Executive Order 13045 as applying only to
those regulatory actions that are based on health or safety risks, such
that the analysis required under section 5-501 of the Order has the
potential to influence the regulation. Today's action is based on
technology performance and not on health or safety risks and therefore
is not subject to Executive Order 13045.

H. Executive Order 13211: Actions Concerning Regulations That
Significantly Affect Energy Supply, Distribution, or Use

    Today's action is not a significant energy action: as defined in
Executive Order 13211, ``Actions Concerning Regulations That
Significantly Affect Energy Supply, Distribution, or Use'' (66 FR
28355, May 22, 2001) because it is not likely to have a significant
adverse effect on the supply, distribution, or use of energy because it
only clarifies our intent and corrects errors in the existing rule.
Further, we have concluded that the proposed rule amendments are not
likely to have any adverse energy effects.

I. National Technology Transfer Advancement Act

    Section 12(d) of the National Technology Transfer and Advancement
Act of 1995 (NTTAA), Public Law 104-113, section 12(d) (15 U.S.C. 272
note) directs us to use voluntary consensus standards in our regulatory
activities unless to do so would be inconsistent with applicable law or
otherwise impractical. Voluntary consensus standards are technical
standards (e.g., material specifications, test methods, sampling
procedures, business practices) developed or adopted by one or more
voluntary consensus bodies. The NTTAA directs us to provide Congress,
through OMB, explanations when we decide not use available and
applicable voluntary consensus standards.
    This action does not involve any new technical standards or the
incorporation by reference of existing technical standards. Therefore,
the consideration of voluntary consensus standards is not relevant to
this action.

List of Subjects in 40 CFR Part 63

    Environmental protection, Air pollution control, Hazardous
substances, Reporting and recordkeeping requirements.

    Dated: April 25, 2006.
Stephen L. Johnson,
Administrator.
    For the reasons stated in the preamble, title 40, chapter I, part
63, of the Code of the Federal Regulations is proposed to be amended as
follows:

PART 63--[AMENDED]

    1. The authority citation for part 63 continues to read as follows:

    Authority: 42 U.S.C. 7401 et seq.

Subpart GGGGG--[Amended]

    2. Section 63.7881 is amended by revising paragraphs (a)(3) and (c)
to read as follows:

Sec.  63.7881  Am I subject to this subpart?

    (a) * * *
    (3) Your facility is a major source of HAP as defined in Sec.
63.2, except that for facilities that are production field facilities,
as defined in Sec.  63.761, only HAP emissions from glycol dehydration
units, storage vessels with the potential for flash emissions (both as
defined in Sec.  63.761), and site remediation activities shall be
aggregated for a major source determination. A major source emits or
has the potential to emit any single HAP at the rate of 10 tons (9.07
megagrams) or more per year or any combination of

HAP at a rate of 25 tons (22.68 megagrams) or more per year.
* * * * *
    (c) Your site remediation activities are not subject to the
requirements of this subpart, except for the recordkeeping requirements
in this paragraph (c), if the total quantity of the HAP listed in Table
1 to this subpart that is contained in the remediation material
excavated, extracted, pumped, or otherwise removed during all of the
site remediations conducted at your facility in a calendar year is less
than 1 megagram per year (Mg/yr). This exemption applies the 1 Mg/yr
limit on a facilitywide, calendar-year basis and there is no
restriction of the number of site remediations that can be conducted
during this period. You must prepare and maintain at your facility
written documentation to support your determination that the total HAP
quantity in your remediation materials for the year is less than 1 Mg.
The documentation must include a description of your methodology and
data used for determining the total HAP content of the remediation
material.
* * * * *
    3. Section 63.7884 is revised to read as follows:

Sec.  63.7884  What are the general standards I must meet for each site
remediation with affected sources?

    (a) For each site remediation with affected sources designated
under Sec.  63.7882, you must meet the standards specified in
Sec. Sec.  63.7885 through 63.7955, as applicable to your affected
sources, unless your site remediation meets the requirements for an
exemption under paragraph (b) of this section.
    (b) A site remediation that is completed within 30 consecutive
calendar days according to the conditions in paragraphs (b)(1) through
(3) of this section is not subject to the standards under paragraph (a)
of this section. This exemption cannot be used for a site remediation
involving the staged or intermittent cleanup of remediation material
whereby the remediation activities at the site are started, stopped,
and then re-started in a series of intervals with durations less than
30-days per interval for which the total time of all of the intervals
required to complete the site remediation exceeds a total of 30 days.
    (1) The 30 consecutive calendar day period for a site remediation
that qualifies for this exemption is determined according to actions
taken by you as defined in paragraphs (b)(1)(i) and (b)(1)(ii) of this
section.
    (i) The first day of the compliance period is defined as the day on
which you initiate any action that removes, destroys, degrades,
transforms, immobilizes, or otherwise manages the remediation
materials. The following activities, when completed before beginning
this initial action, are not counted as part of the 30-day period:
Activities to characterize the type and extent of the contamination by
collecting and analyzing samples; activities to obtain permits from
Federal, State, or local authorities to conduct the site remediation;
activities to schedule workers and necessary equipment; and activities
to arrange for contractor or third party assistance in performing the
site remediation.
    (ii) The last day of the compliance period is defined as the day on
which treatment or disposal of all of the remediation materials
generated by the cleanup is completed such that the organic
constituents in these materials no longer have a reasonable potential
for volatilizing and being released to the atmosphere.
    (2) For the purpose of complying with this paragraph (b)(2), if you
ship or otherwise transfer the remediation material off-site you must
complete the transfer of all of the material to a facility where your
remediation material will be treated or disposed within the 30-day
period such that the organic constituents in these materials no longer
have a reasonable potential for volatilizing and being released to the
atmosphere. If remediation material is to be shipped or otherwise
transferred to an off-site facility where the final treatment or
disposal of the material cannot be completed within the 30-day period,
then the transfer (and subsequent management) of this material is
subject to the requirements specified in Sec.  63.7936.
    (3) You must prepare and maintain at your facility written
documentation describing the exempted site remediation, and listing the
initiation and completion dates for the site remediation.
    4. Section 63.7886 is amended by revising paragraph (b)(2) to read
as follows:

Sec.  63.7886  What are the general standards I must meet for my
affected remediation material management units?

* * * * *
    (b) * * *
    (2) You determine that the average total VOHAP concentration, as
defined in Sec.  63.7957, of the remediation material managed in the
remediation material management unit material is less than 500 ppmw.
You must follow the requirements in Sec.  63.7943 to demonstrate that
the VOHAP concentration of the remediation material is less than 500
ppmw. Once the VOHAP concentration for a remediation material has been
determined to be less than 500 ppmw, all remediation material
management units downstream from the point of determination managing
this material meet the requirements of this paragraph unless a
remediation process is used that concentrates all, or part of, the
remediation material being managed in the unit such that the VOHAP
concentration of the material could increase (e.g., free-product
separation).
* * * * *
    5. Section 63.7887 is revised to read as follows:

Sec.  63.7887  What are the general standards I must meet for my
affected equipment leak sources?

    (a) You must control HAP emissions from equipment leaks from each
equipment component that is part of the affected source by implementing
leak detection and control measures according to the standards
specified in Sec. Sec.  63.7920 through 63.7922 unless you elect to
meet the requirements in paragraph (b) of this section.
    (b) If the affected equipment leak source is also subject to
another subpart under 40 CFR part 61 or 40 CFR part 63, you may control
emissions of the HAP listed in Table 1 to this subpart from the
affected equipment leak source in compliance with the standards
specified in the other applicable subpart. This means you are complying
with all applicable emissions limitations and work practice standards
under the other subpart (e.g., you implement leak detection and control
measures to reduce HAP emissions as specified by the applicable
subpart). This provision does not apply to any exemption of the
affected source from the emissions limitations and work practice
standards allowed by the other applicable subpart.
    6. Section 63.7890 is amended by revising paragraph (b)(2) to read
as follows:

Sec.  63.7890  What emissions limitations and work practice standards
must I meet for process vents?

* * * * *
    (b) * * *
    (2) Reduce from all affected process vents the emissions of total
organic compounds (TOC) (minus methane and ethane) to a level below 1.4
kg/hr and 2.8 Mg/yr (3.0 lb/hr and 3.1 tpy); or
* * * * *
    7. Section 63.7893 is amended by revising paragraph (b)
introductory text to read as follows:

Sec.  63.7893  How do I demonstrate continuous compliance with the
emissions limitations and work practice standards for process vents?

* * * * *
    (b) You must maintain emission levels from all of your affected
process vents to meet the facilitywide emission limits in Sec.
63.7890(b) that apply to you, as specified in paragraphs (b)(1) through
(4) of this section.
* * * * *
    8. Section 63.7896 is amended by revising paragraph (b)(2) to read
as follows:

Sec.  63.7896  How do I demonstrate initial compliance with the
emissions limitations and work practice standards for tanks?

* * * * *
    (b) * * *
    (2) You have determined, according to the procedures in Sec.
63.7944, and recorded the maximum HAP vapor pressure of the remediation
material placed in each affected tank subject to Sec.  63.7886(b)(1)(i)
that does not use Tank Level 2 controls.
* * * * *
    9. Section 63.7898 is amended by revising paragraph (e)(2) to read
as follows:

Sec.  63.7898  How do I demonstrate continuous compliance with the
emissions limitations and work practice standards for tanks?

* * * * *
    (e) * * *
    (2) Visually inspecting the external floating roof according to the
requirements in Sec.  63.1063(d)(1) and inspecting the seals according
to the requirements in Sec.  63.1063(d)(2) and (3).
* * * * *
    10. Section 63.7903 is amended by revising paragraphs (a) and (b)
introductory text to read as follows:

Sec.  63.7903  How do I demonstrate continuous compliance with the
emissions limitations and work practice standards for containers?

    (a) You must demonstrate continuous compliance with the emission
limitations and work practice standards in Sec.  63.7900 applicable to
your affected containers by meeting the requirements in paragraphs (b)
through (e) of this section.
    (b) You must demonstrate continuous compliance with the requirement
to determine the applicable container control level specified in Sec.
63.7900(b) for each affected container by meeting the requirements in
paragraphs (b)(1) through (3) of this section.
* * * * *
    11. Section 63.7913 is amended by revising paragraph (c)
introductory text to read as follows:

Sec.  63.7913  How do I demonstrate continuous compliance with the
emissions limitations and work practice standards for separators?

* * * * *
    (c) You must demonstrate continuous compliance for each separator
using a fixed roof vented through a closed vent system to a control
device according to Sec.  63.7910(b)(2) by meeting the requirements in
paragraphs (c)(1) through (6) of this section.
* * * * *
    12. Section 63.7915 is amended by revising paragraph (c)(2) to read
as follows:

Sec.  63.7915  What emissions limitations and work practice standards
must I meet for transfer systems?

* * * * *
    (c) * * *
    (2) A transfer system that consists of continuous hard-piping. All
joints or seams between the pipe sections must be permanently or semi-
permanently sealed (e.g., a welded joint between two sections of metal
pipe or a bolted and gasketed flange).
* * * * *
    13. Section 63.7917 is amended by revising the first sentence of
paragraph (c) to read as follows:

Sec.  63.7917  What are my inspection and monitoring requirements for
transfer systems?

* * * * *
    (c) If you operate a transfer system consisting of hard piping
according to Sec.  63.7917(c)(2), you must annually inspect the
unburied portion of pipeline and all joints for leaks and other
defects.* * *
* * * * *
    14. Section 63.7918 is amended by revising paragraph (e)
introductory text to read as follows:

Sec.  63.7918  How do I demonstrate continuous compliance with the
emissions limitations and work practice standards for transfer systems?

* * * * *
    (e) You must demonstrate continuous compliance for each transfer
system that is enclosed and vented to a control device according to
Sec.  63.7915(c)(3) by meeting the requirements in paragraphs (e)(1)
through (5) of this section.
* * * * *
    15. Section 63.7927 is amended by revising paragraph (b)(3) to read
as follows:

Sec.  63.7927  What are my inspection and monitoring requirements for
closed vent systems and control devices?

* * * * *
    (b) * * *
    (3) Use a CPMS to measure and record the hourly average temperature
of the adsorption bed after regeneration (and within 15 minutes after
completing any cooling cycle).
* * * * *
    16. Section 63.7928 is amended by revising paragraphs (b)(6),
(b)(7) and (c) introductory text to read as follows:

Sec.  63.7928  How do I demonstrate continuous compliance with the
emissions limitations and work practice standards for closed vent
systems and control devices?

* * * * *
    (b) * * *
    (6) If the closed vent system is equipped with a flow indicator,
recording the information in Sec.  63.693(c)(2)(i).
    (7) If the closed vent system is equipped with a seal or locking
device, visually inspecting the seal or closure mechanism at least
monthly according to the requirements in Sec.  63.693(c)(2)(ii), and
recording the results of each inspection.
    (c) You must demonstrate continuous compliance of each control
device subject to the emissions limits in Sec.  63.7925(d) with the
applicable emissions limit in Sec.  63.7925(d) by meeting the
requirements in paragraph (c)(1) or (2) of this section.
* * * * *
    17. Section 63.7937 is amended by revising paragraphs (c)(2) and
(c)(4)(ii) to read as follows:

Sec.  63.7937  How do I demonstrate initial compliance with the general
standards?

* * * * *
    (c) * * *
    (2) If the remediation material managed in the affected remediation
material management unit has an average total VOHAP concentration less
than 500 ppmw according to Sec.  63.7886(b)(2), you have submitted as
part of your notification of compliance status, specified in Sec.
63.7950, a signed statement that you have determined, according to the
procedures in Sec.  63.7943, and recorded the average VOHAP
concentration of the remediation material placed in the affected
remediation material management unit.
* * * * *
    (4) * * *
    (ii) You will monitor the biological treatment process conducted in
each

unit according to the requirements in Sec.  63.684(e)(4).
* * * * *
    18. Section 63.7938 is amended by revising paragraph (c)(4)(ii) to
read as follows:

Sec.  63.7938  How do I demonstrate continuous compliance with the
general standards?

* * * * *
    (c) * * *
    (4) * * *
    (ii) Monitoring the biological treatment process conducted in each
unit according to the requirements in Sec.  63.7886(4)(i).
* * * * *
    19. Section 63.7940 is amended by revising paragraph (c) to read as
follows:

Sec.  63.7940  By what date must I conduct performance tests or other
initial compliance demonstrations?

* * * * *
    (c) For new sources, you must conduct initial performance tests and
other initial compliance demonstrations according to the provisions in
Sec.  63.7(a)(2).
    20. Section 63.7941 is amended as follows:
    a. Revise paragraph (c);
    b. Revise paragraph (g); and
    c. Remove and reserve paragraph (h).

Sec.  63.7941  How do I conduct a performance test, design evaluation,
or other type of initial compliance demonstration?

* * * * *
    (c) If you use a carbon adsorption system, condenser, vapor
incinerator, boiler, or process heater to meet an emission limit in
this subpart, you may choose to perform a design evaluation to
demonstrate initial compliance instead of a performance test. You must
perform a design evaluation according to the general requirements in
Sec.  63.693(b)(8) and the specific requirements in Sec.
63.693(d)(2)(ii) for a carbon adsorption system (including establishing
carbon replacement schedules and associated requirements), Sec.
63.693(e)(2)(ii) for a condenser, Sec.  63.693(f)(2)(ii) for a vapor
incinerator, or Sec.  63.693(g)(2)(i)(B) for a boiler or process
heater.
* * * * *
    (g) If you are required to conduct a visual inspection of an
affected source, you must conduct the inspection according to the
procedures in Sec.  63.906(a)(1) for Tank Level 1 controls, Sec.
63.1063(d) for Tank Level 2 controls, Sec.  63.926(a) for Container
Level 1 controls, Sec.  63.946(a) for a surface impoundment equipped
with a floating membrane cover, Sec.  63.946(b) for a surface
impoundment equipped with a cover and vented to a control device, Sec.
63.1047(a) for a separator with a fixed roof, Sec.  63.1047(c) for a
separator equipped with a fixed roof and vented to a control device,
Sec.  63.695(c)(1)(i) or (c)(2)(i) for a closed vent system, and Sec.
63.964(a) for individual drain systems.
    (h) [Reserved]
* * * * *
    21. Section 63.7943 is amended as follows:
    a. Revise paragraph (a);
    b. Revise paragraph (b) introductory text;
    c. Revise paragraphs (b)(1) introductory text and (b)(3); and
    d. Revise paragraph (c) introductory text.

Sec.  63.7943  How do I determine the average VOHAP concentration of my
remediation material?

    (a) General requirements. You must determine the average total
VOHAP concentration of a remediation material using either direct
measurement as specified in paragraph (b) of this section or by
knowledge as specified in paragraph (c) of this section. These methods
may be used to determine the average VOHAP concentration of any
material listed in (a)(1) through (3) of this section.
    (1) A single remediation material stream; or
    (2) Two or more remediation material streams that are combined
prior to, or within, a remediation material management unit or
treatment process; or
    (3) Remediation material that is combined with one or more non-
remediation material streams prior to, or within, a remediation
material management unit or treatment process.
    (b) Direct measurement. To determine the average total VOHAP
concentration of a remediation material using direct measurement, you
must use the procedures in paragraphs (b)(1) through (3) of this
section.
    (1) Sampling. Samples of each material stream must be collected
from the container, pipeline, or other device used to deliver each
material stream prior to entering the remediation material management
unit or treatment process in a manner such that volatilization of
organics contained in the sample is minimized and an adequately
representative sample is collected and maintained for analysis by the
selected method.
* * * * *
    (3) Calculations. The average total VOHAP concentration (C) on a
mass-weighted basis must be calculated by using the results for all
samples analyzed according to paragraph (b)(2) of this section and
Equation 1 of this section as follows:
[GRAPHIC] [TIFF OMITTED] TP01MY06.001

Where:

C = Average VOHAP concentration of the material on a mass-weighted
basis, ppmw.
i = Individual sample ``i'' of the material.
n = Total number of samples of the material collected (at least 4
per stream) for the averaging period (not to exceed 1 year).
Qi = Mass quantity of material stream represented by
Ci, kilograms per hour (kg/hr).
QT = Total mass quantity of all material during the
averaging period, kg/hr.
Ci = Measured VOHAP concentration of sample ``i'' as
determined according to the requirements of paragraph (b)(2) of this
section, ppmw.

    (c) Knowledge of the material. To determine the average total
VOHAP concentration of a remediation material using knowledge, you
must use the procedures in paragraphs (c)(1) through (3) of this
section.
* * * * *
    22. Section 63.7956 is amended by revising paragraph (c)
introductory text to read as follows:

Sec.  63.7956  Who implements and enforces this subpart?

* * * * *
    (c) The authorities that cannot be delegated to State, local, or
tribal agencies are listed in paragraphs (c)(1) through (4) of this
section.
* * * * *
    23. Section 63.7957 is amended by removing the definition of
``Point-of-extraction'' and revising the definitions of ``Deviation''
and ``Transfer system'' to read as follows:

Sec.  63.7957  What definitions apply to this subpart?

* * * * *
    Deviation means any instance in which an affected source subject to
this subpart, or an owner or operator of such a source:
    (1) Fails to meet any requirement or obligation established by this
subpart, including but not limited to any emissions limitation
(including any operating limit), or work practice standard;
    (2) Fails to meet any term or condition that is adopted to
implement an applicable requirement in this subpart and that is
included in the operating permit for any affected source required to
obtain such a permit; or
    (3) Fails to meet any emissions limitation (including any operating
limit), or work practice standard in this subpart during startup,
shutdown, or malfunction, regardless of whether or

not such failure is permitted by this subpart.
* * * * *
    Transfer system means a stationary system for which the predominant
function is to convey liquids or solid materials from one point to
another point within a waste management operation or recovery
operation. For the purpose of this subpart, the conveyance of material
using a container (as defined for this subpart) or a self-propelled
vehicle (e.g., a front-end loader) is not a transfer system. Examples
of a transfer system include but are not limited to a pipeline, an
individual drain system, a gravity-operated conveyor (such as a chute),
and a mechanically-powered conveyor (such as a belt or screw conveyor).
* * * * *
    24. Table 1 to Subpart GGGGG of Part 63 is revised to read as
follows:

 Table 1 to Subpart GGGGG of Part 63.--List of Hazardous Air Pollutants
------------------------------------------------------------------------
           CAS No. \a\                   Compound name          Fm 305
------------------------------------------------------------------------
75070............................  Acetaldehyde.............      1.000
75058............................  Acetonitrile.............      0.989
98862............................  Acetophenone.............      0.314
98862............................  Acetophenone.............      0.314
107028...........................  Acrolein.................      1.000
107131...........................  Acrylonitrile............      0.999
107051...........................  Allyl chloride...........      1.000
71432............................  Benzene (includes benzene      1.000
                                    in gasoline).
98077............................  Benzotrichloride (isomers      0.958
                                    and mixture).
100447...........................  Benzyl chloride..........      1.000
92524............................  Biphenyl.................      0.864
542881...........................  Bis(chloromethyl)ether\b\      0.999
75252............................  Bromoform................      0.998
106990...........................  1,3-Butadiene............      1.000
75150............................  Carbon disulfide.........      1.000
56235............................  Carbon Tetrachloride.....      1.000
43581............................  Carbonyl sulfide.........      1.000
133904...........................  Chloramben...............      0.633
108907...........................  Chlorobenzene............      1.000
67663............................  Chloroform...............      1.000
107302...........................  Chloromethyl methyl            1.000
                                    ether\b\.
126998...........................  Chloroprene..............      1.000
98828............................  Cumene...................      1.000
94757............................  2,4-D, salts and esters..      0.167
334883...........................  Diazomethane\c\..........      0.999
132649...........................  Dibenzofurans............      0.967
96128............................  1,2-Dibromo-3-                 1.000
                                    chloropropane.
106467...........................  1,4-Dichlorobenzene (p)..      1.000
107062...........................  Dichloroethane (Ethylene       1.000
                                    dichloride).
111444...........................  Dichloroethyl ether (Bis       0.757
                                    (2-chloroethylether)).
542756...........................  1,3-Dichloropropene......      1.000
79447............................  Dimethyl carbamoyl             0.150
                                    chloride\c\.
64675............................  Diethyl sulfate..........      0.0025
77781............................  Dimethyl sulfate.........      0.086
121697...........................  N,N-Dimethylaniline......      0.0008
51285............................  2,4-Dinitrophenol........      0.0077
121142...........................  2,4-Dinitrotoluene.......      0.0848
123911...........................  1,4-Dioxane (1,4-              0.869
                                    Diethyleneoxide).
106898...........................  Epichlorohydrin (1-Chloro-     0.939
                                    2,3-epoxypropane).
106887...........................  1,2-Epoxybutane..........      1.000
140885...........................  Ethyl acrylate...........      1.000
100414...........................  Ethyl benzene............      1.000
75003............................  Ethyl chloride                 1.000
                                    (Chloroethane).
106934...........................  Ethylene dibromide             0.999
                                    (Dibromoethane).
107062...........................  Ethylene dichloride (1,2-      1.000
                                    Dichloroethane).
151564...........................  Ethylene imine                 0.867
                                    (Aziridine).
75218............................  Ethylene oxide...........      1.000
75343............................  Ethylidene dichloride          1.000
                                    (1,1-Dichloroethane).
                                   Glycol ethers\d\ that      (\e\)
                                    have a Henry's Law
                                    Constant value equal to
                                    or greater than 0.1 Y/
                                    X(1.8 x 10-6 atm/gm-mole/
                                    m\3\) at 25 [deg]C.
118741...........................  Hexachlorobenzene........      0.97
87683............................  Hexachlorobutadiene......      0.88
67721............................  Hexachloroethane.........      0.499
110543...........................  Hexane...................      1.000
78591............................  Isophorone...............      0.506
58899............................  Lindane (all isomers)....      1.000
67561............................  Methanol.................      0.855
74839............................  Methyl bromide                 1.000
                                    (Bromomethane).
74873............................  Methyl chloride                1.000
                                    (Choromethane).
71556............................  Methyl chloroform (1,1,1-      1.000
                                    Trichloroethane).
78933............................  Methyl ethyl ketone (2-        0.990
                                    Butanone).
74884............................  Methyl iodide                  1.000
                                    (Iodomethane).

108101...........................  Methyl isobutyl ketone         0.979
                                    (Hexone).
624839...........................  Methyl isocyanate........      1.000
80626............................  Methyl methacrylate......      0.999
1634044..........................  Methyl tert butyl ether..      1.000
75092............................  Methylene chloride             1.000
                                    (Dichloromethane).
91203............................  Naphthalene..............      0.994
98953............................  Nitrobenzene.............      0.394
79469............................  2-Nitropropane...........      0.989
82688............................  Pentachloronitrobenzene        0.839
                                    (Quintobenzene).
87865............................  Pentachlorophenol........      0.0898
75445............................  Phosgene \c\.............      1.000
123386...........................  Propionaldehyde..........      0.999
78875............................  Propylene dichloride (1,2-     1.000
                                    Dichloropropane).
75569............................  Propylene oxide..........      1.000
75558............................  1,2-Propylenimine (2-          0.945
                                    Methyl aziridine).
100425...........................  Styrene..................      1.000
96093............................  Styrene oxide............      0.830
79345............................  1,1,2,2-Tetrachloroethane      0.999
127184...........................  Tetrachloroethylene            1.000
                                    (Perchloroethylene).
108883...........................  Toluene..................      1.000
95534............................  o-Toluidine..............      0.152
120821...........................  1,2,4-Trichlorobenzene...      1.000
71556............................  1,1,1-Trichloroethane          1.000
                                    (Methyl chlorform).
79005............................  1,1,2-Trichloroethane          1.000
                                    (Vinyltrichloride).
79016............................  Trichloroethylene........      1.000
95954............................  2,4,5-Trichlorophenol....      0.108
88062............................  2,4,6-Trichlorophenol....      0.132
121448...........................  Triethylamine............      1.000
540841...........................  2,2,4-Trimethylpentane...      1.000
108054...........................  Vinyl acetate............      1.000
593602...........................  Vinyl bromide............      1.000
75014............................  Vinyl chloride...........      1.000
75354............................  Vinylidene chloride (1,1-      1.000
                                    Dichloroethylene).
1330207..........................  Xylenes (isomers and           1.000
                                    mixture).
95476............................  o-Xylenes................      1.000
108383...........................  m-Xylenes................      1.000
106423...........................  p-Xylenes................      1.000
------------------------------------------------------------------------
Notes:
Fm 305 Fraction measure factor in Method 305, 40 CFR 305 part 63,
  appendix A.
\a\ CAS numbers refer to the Chemical Abstracts Services registry number
  assigned to specific compounds, isomers, or mixtures of compounds.
\b\ Denotes a HAP that hydrolyzes quickly in water, but the hydrolysis
  products are also HAP chemicals.
\c\ Denotes a HAP that may react violently with water.
\d\ Denotes a HAP that hydrolyzes slowly in water.
\e\ The Fm 305 factors for some of the more common glycol 305 ethers can
  be obtained by contacting the Waste and Chemical Processes Group,
  Office of Air Quality Planning and Standards, Research Triangle Park,
  NC 27711.

    25. Table 3 to Subpart GGGGG is amended by revising the entry for
``63.7(c)'' to read as follows:

           Table 3 to Subpart GGGGG of Part 63.--Applicability of General Provisions to Subpart GGGGG
                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------
       Citation                Subject                 Brief description              Applies to Subpart GGGGG
----------------------------------------------------------------------------------------------------------------

                                                  * * * * * * *
Sec.   63.7(c)........  Quality Assurance/    Requirement to submit site-specific  Yes.
                         Test Plan.            test plan 60 days before the test
                                               or on date Administrator agrees
                                               with: Test plan approval
                                               procedures; performance audit
                                               requirements; internal and
                                               external QA procedures for testing.

                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------

[FR Doc. 06-4080 Filed 4-28-06; 8:45 am]

BILLING CODE 6560-50-P