Proposed Rule2025-12800
National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
July 10, 2025
Issuing agencies
Environmental Protection Agency
Abstract
The Oklahoma Department of Environmental Quality (ODEQ) has submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of certain National Emission Standards for Hazardous Air Pollutants (NESHAP) for all sources, as provided for under previously approved delegation mechanisms. The updated State regulations incorporate by reference certain NESHAP promulgated by the Environmental Protection Agency (EPA), as they existed through June 30, 2023. The EPA is proposing to approve ODEQ's requested delegation update. The proposed delegation of authority under this action applies to sources located in certain areas of Indian country as discussed herein.
Full Text
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<title>Federal Register, Volume 90 Issue 130 (Thursday, July 10, 2025)</title>
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[Federal Register Volume 90, Number 130 (Thursday, July 10, 2025)]
[Proposed Rules]
[Pages 30613-30616]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2025-12800]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Parts 61 and 63
[EPA-R06-OAR-2020-0086; FRL-12761-01-R6]
National Emission Standards for Hazardous Air Pollutants;
Delegation of Authority to Oklahoma
AGENCY: Environmental Protection Agency (EPA).
ACTION: Proposed rule.
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SUMMARY: The Oklahoma Department of Environmental Quality (ODEQ) has
submitted updated regulations for receiving delegation and approval of
its program for the implementation and enforcement of certain National
Emission Standards for Hazardous Air Pollutants (NESHAP) for all
sources, as provided for under previously approved delegation
mechanisms. The updated State regulations incorporate by reference
certain NESHAP promulgated by the Environmental Protection Agency
(EPA), as they existed through June 30, 2023. The EPA is proposing to
approve ODEQ's requested delegation update. The proposed delegation of
authority under this action applies to sources located in certain areas
of Indian country as discussed herein.
DATES: Written comments must be received on or before August 11, 2025.
ADDRESSES: Submit your comments, identified by Docket No. EPA-R06-OAR-
2020-0086, at <a href="https://www.regulations.gov">https://www.regulations.gov</a> or via email to
<a href="/cdn-cgi/l/email-protection#04666576766170702a766d676c657660446174652a636b72"><span class="__cf_email__" data-cfemail="b3d1d2c1c1d6c7c79dc1dad0dbd2c1d7f3d6c3d29dd4dcc5">[email protected]</span></a>. Follow the online instructions for submitting
comments. Once submitted, comments cannot be edited or removed from
<a href="http://Regulations.gov">Regulations.gov</a>. The EPA may publish any comment received to its public
docket. Do not submit electronically any information you consider to be
Confidential Business Information (CBI) or other information whose
disclosure is restricted by statute. Multimedia submissions (audio,
video, etc.) must be accompanied by a written comment. The written
comment is considered the official comment and should include
discussion of all points you wish to make. The EPA will generally not
consider comments or comment contents located outside of the primary
submission (i.e., on the web, cloud, or other file sharing system). For
additional submission methods, please contact Rick Barrett, 214-665-
7227, <a href="/cdn-cgi/l/email-protection#ceacafbcbcabbabae0bca7ada6afbcaa8eabbeafe0a9a1b8"><span class="__cf_email__" data-cfemail="51333023233425257f23383239302335113421307f363e27">[email protected]</span></a>. For the full EPA public comment policy,
information about CBI or multimedia submissions, and general guidance
on making effective comments, please visit <a href="https://www.epa.gov/dockets/commenting-epa-dockets">https://www.epa.gov/dockets/commenting-epa-dockets</a>.
Docket: The index to the docket for this action is available
electronically at <a href="http://www.regulations.gov">www.regulations.gov</a>. While all documents in the
docket are listed in the index, some information may not be publicly
available due to docket file size restrictions or content (e.g., CBI).
FOR FURTHER INFORMATION CONTACT: Rick Barrett, EPA Region 6 Office, Air
Permits Section (ARPE), 214-665-7227, <a href="/cdn-cgi/l/email-protection#98faf9eaeafdececb6eaf1fbf0f9eafcd8fde8f9b6fff7ee"><span class="__cf_email__" data-cfemail="7a181b08081f0e0e54081319121b081e3a1f0a1b541d150c">[email protected]</span></a>. We
encourage the public to submit comments via <a href="https://www.regulations.gov">https://www.regulations.gov</a>. Please call or email the contact listed above if
you need alternative access to material indexed but not provided in the
docket.
SUPPLEMENTARY INFORMATION: Throughout this document wherever ``we,''
``us,'' or ``our'' is used, we mean the EPA.
Table of Contents
I. What does this action do?
II. What is the authority for delegation?
III. What criteria must Oklahoma's program meet to be approved?
IV. How did ODEQ meet the NESHAP program approval criteria?
V. What is being delegated?
VI. What is not being delegated?
VII. How will statutory and regulatory interpretations be made?
VIII. What authority does the EPA have?
IX. What information must ODEQ provide to the EPA?
X. What is the EPA's oversight role?
XI. Should sources submit notices to the EPA or ODEQ?
XII. How will unchanged authorities be delegated to ODEQ in the
future?
XIII. Impact on Areas of Indian Country
XIV. Proposed Action
XV. Statutory and Executive Order Reviews
I. What does this action do?
The EPA is proposing to approve the delegation of the
implementation and enforcement of certain NESHAP to ODEQ. If finalized,
the delegation will provide ODEQ with the primary responsibility to
implement and enforce the delegated standards.
II. What is the authority for delegation?
Section 112(l) of the Clean Air Act (CAA), and 40 CFR part 63,
subpart E, authorize the EPA to delegate authority to any State or
local agency which submits adequate regulatory procedures for
implementation and enforcement of emission standards for hazardous air
pollutants. The hazardous air pollutant standards are codified at 40
CFR parts 61 and 63.
III. What criteria must Oklahoma's program meet to be approved?
Section 112(l)(5) of the CAA requires the EPA to disapprove any
program submitted by a State for the delegation of NESHAP standards if
the EPA determines that:
(A) the authorities contained in the program are not adequate to
assure compliance by the sources within the State with respect to each
applicable standard, regulation, or requirement established under
section 112;
(B) adequate authority does not exist, or adequate resources are
not available, to implement the program;
(C) the schedule for implementing the program and assuring
compliance by affected sources is not sufficiently expeditious; or
(D) the program is otherwise not in compliance with the guidance
issued by the EPA under section 112(l)(2) or is not likely to satisfy,
in whole or in part, the objectives of the CAA.
In carrying out its responsibilities under section 112(l), the EPA
promulgated regulations at 40 CFR part 63, subpart E, setting forth
criteria for the approval of submitted programs. For example, to obtain
approval of a program to implement and enforce Federal section 112
rules as promulgated without changes (straight delegation) for part 70
sources, a State must demonstrate that it meets the criteria of 40 CFR
63.91(d). 40 CFR 63.91(d)(3) provides that interim or final Title V
program approval will satisfy the criteria of 40 CFR 63.91(d).\1\ The
NESHAP delegation for Oklahoma, as it applies to both part 70 and non-
part 70
[[Page 30614]]
sources, was most recently approved on June 20, 2025 (90 FR 26213).
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\1\ Some NESHAP standards do not require a source to obtain a
Title V permit (e.g., certain area sources that are exempt from the
requirement to obtain a Title V permit). For these non-Title V
sources, the EPA believes that the State must assure the EPA that it
can implement and enforce the NESHAP for such sources. See 65 FR
55810, 55813 (September 14, 2000). The EPA previously approved
Oklahoma's program to implement and enforce the NESHAP as they apply
to non-part 70 sources. See 66 FR 1584 (January 9, 2001).
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IV. How did ODEQ meet the NESHAP program approval criteria?
As to the NESHAP standards in 40 CFR parts 61 and 63, as part of
its Title V submission ODEQ stated that it intended to use the
mechanism of incorporation by reference to adopt unchanged Federal
section 112 standards into its regulations. This commitment applied to
both existing and future standards as they applied to part 70 sources.
The EPA's final interim approval of Oklahoma's Title V operating
permits program delegated the authority to implement certain NESHAP to
the State, effective March 6, 1996 (61 FR 4220, February 5, 1996). On
December 5, 2001, the EPA promulgated full approval of the State's
operating permits program, effective November 30, 2001 (66 FR 63170).
These interim and final Title V program approvals satisfy the up-front
approval criteria of 40 CFR 63.91(d). Under 40 CFR 63.91(d)(2), once a
State has satisfied up-front approval criteria, it needs only to
reference the previous demonstration and reaffirm that it still meets
the criteria for any subsequent submittals of the section 112
standards. ODEQ has affirmed that it still meets the up-front approval
criteria. With respect to non-part 70 sources, the EPA has previously
approved delegation of NESHAP authorities to ODEQ after finding
adequate authorities to implement and enforce the NESHAP for such
sources. See 66 FR 1584 (January 9, 2001).
V. What is being delegated?
By letter dated October 28, 2024, the EPA received a request from
ODEQ to update its existing NESHAP delegation. With certain exceptions
noted in section VII of this document, ODEQ's request included certain
NESHAP in 40 CFR parts 61 and 63. ODEQ's request included newly
incorporated NESHAP promulgated by the EPA and amendments to existing
standards currently delegated, as amended between June 30, 2022, and
June 30, 2023, as adopted by the State.
VI. What is not being delegated?
All authorities not affirmatively and expressly proposed for
delegation by this action will not be delegated. These include the
following parts 61 and 63 authorities listed below:
<bullet> 40 CFR part 61, subpart B (National Emission Standards for
Radon Emissions from Underground Uranium Mines);
<bullet> 40 CFR part 61, subpart H (National Emission Standards for
Emissions of Radionuclides Other Than Radon From Department of Energy
Facilities);
<bullet> 40 CFR part 61, subpart I (National Emission Standards for
Radionuclide Emissions from Federal Facilities Other Than Nuclear
Regulatory Commission Licensees and Not Covered by Subpart H);
<bullet> 40 CFR part 61, subpart K (National Emission Standards for
Radionuclide Emissions from Elemental Phosphorus Plants);
<bullet> 40 CFR part 61, subpart Q (National Emission Standards for
Radon Emissions from Department of Energy facilities);
<bullet> 40 CFR part 61, subpart R (National Emission Standards for
Radon Emissions from Phosphogypsum Stacks);
<bullet> 40 CFR part 61, subpart T (National Emission Standards for
Radon Emissions from the Disposal of Uranium Mill Tailings); and
<bullet> 40 CFR part 61, subpart W (National Emission Standards for
Radon Emissions from Operating Mill Tailings).
In addition, the EPA regulations provide that we cannot delegate to
a State any of the Category II Subpart A authorities set forth in 40
CFR 63.91(g)(2). These include the following provisions: Sec. 63.6(g),
Approval of Alternative Non-Opacity Standards; Sec. 63.6(h)(9),
Approval of Alternative Opacity Standards; Sec. 63.7(e)(2)(ii) and
(f), Approval of Major Alternatives to Test Methods; Sec. 63.8(f),
Approval of Major Alternatives to Monitoring; and Sec. 63.10(f),
Approval of Major Alternatives to Recordkeeping and Reporting. Also,
some 40 CFR parts 61 and 63 standards have certain provisions that
cannot be delegated to the States as outlined in specific subparts.
Furthermore, no authorities are being proposed for delegation that
require rulemaking in the Federal Register to implement, or where
Federal overview is the only way to ensure national consistency in the
application of the standards or requirements of CAA section 112.
Finally, this action does not propose delegation of any authority under
section 112(r), the accidental release program.
If this action is finalized as proposed, all questions concerning
implementation and enforcement of the excluded standards in the State
of Oklahoma should be directed to the EPA Region 6 Office.
The EPA is proposing a determination that the NESHAP program
submitted by Oklahoma meets the applicable requirements of CAA section
112(l)(5) and 40 CFR part 63, subpart E.
As more fully discussed in section XIII of this document, the
proposed delegation to ODEQ to implement and enforce certain NESHAP
extends to sources or activities located in certain areas of Indian
country, as described below in section XIV.
VII. How will statutory and regulatory interpretations be made?
If this NESHAP delegation is finalized as proposed, ODEQ will
obtain concurrence from the EPA on any matter involving the
interpretation of section 112 of the CAA or 40 CFR parts 61 and 63 to
the extent that implementation, administration, or enforcement of these
sections have not been covered by prior EPA determinations or guidance.
VIII. What authority does the EPA have?
We retain the right, as provided by CAA section 112(l)(7) and 40
CFR 63.90(d)(2), to enforce any applicable emission standard or
requirement under section 112. In addition, the EPA may enforce any
federally approved State rule, requirement, or program under 40 CFR
63.90(e) and 63.91(c)(1)(i). The EPA also has the authority to make
certain decisions under the General Provisions (subpart A) of parts 61
and 63. We are proposing to delegate to the ODEQ some of these
authorities, and retaining others, as explained in sections V and VI
above. In addition, the EPA may review and disapprove State
determinations and subsequently require corrections. See 40 CFR
63.91(g)(1)(ii). The EPA also has the authority to review ODEQ's
implementation and enforcement of approved rules or programs and to
withdraw approval if we find inadequate implementation or enforcement.
See 40 CFR 63.96.
Furthermore, we retain the authority in an individual emission
standard that may not be delegated according to provisions of the
standard. Finally, we retain the authorities stated in the original
delegation agreement. See ``Provisions for the Implementation and
Enforcement of NSPS and NESHAP in Oklahoma,'' effective March 25, 1982,
a copy of which is included in the docket for this action.
A table of currently delegated NESHAP standards and how the updated
NESHAP delegation would look if this proposal is finalized may be found
in the Technical Support Document (TSD) included in the docket for this
action. The table also shows the authorities that cannot be delegated
to any State or local agency.
[[Page 30615]]
IX. What information must ODEQ provide to the EPA?
ODEQ must provide any additional compliance related information to
the EPA, Region 6, Office of Enforcement and Compliance Assurance,
within 45 days of a request under 40 CFR 63.96(a). Under 40 CFR
63.91(g)(1), Oklahoma may request delegation of any of the authorities
listed as Category I in 40 CFR 63.91(g)(1)(i), and EPA will delegate
any such authorities at its discretion. The State must maintain a
record of all approved alternatives to all monitoring, testing,
recordkeeping, and reporting requirements and provide this list of
alternatives to its EPA Regional Office at least semi-annually, or on a
more frequent basis if requested by the Regional Office. See 40 CFR
63.91(g)(1)(ii).
X. What is the EPA's oversight role?
The EPA must oversee ODEQ's decisions to ensure the delegated
authorities are being adequately implemented and enforced. We will
integrate oversight of the delegated authorities into the existing
mechanisms and resources for oversight currently in place. If, during
oversight, we determine that ODEQ has made decisions that decrease the
stringency of the delegated standards, then ODEQ shall be required to
take corrective actions and the source(s) affected by the decisions
will be notified, as required by and under the procedures set forth at
40 CFR 63.96(b). We will initiate withdrawal proceedings of the program
or rule under 40 CFR 63.96(b) if the corrective actions taken are
insufficient.
XI. Should sources submit notices to the EPA or ODEQ?
For the delegated NESHAP standards and authorities covered by this
proposed action, if finalized, sources would submit all the information
required pursuant to the general provisions and the relevant subpart(s)
of the delegated NESHAP (40 CFR parts 61 and 63) directly via
electronic submittal to online EPA database portals that are specified
in each rule and to the ODEQ. The ODEQ accepts submissions using an
acceptable electronic format or paper submittals at the following
address: Oklahoma Department of Environmental Quality, 707 North
Robinson, P.O. Box 1677, Oklahoma City, Oklahoma 73101-1677. The ODEQ
is the primary point of contact with respect to delegated NESHAP. The
EPA Region 6 proposes to waive the requirement that courtesy
notifications and reports for delegated standards be submitted to the
EPA in addition to ODEQ in accordance with 40 CFR 63.9(a)(4)(ii) and
63.10(a)(4)(ii).\2\ For those standards and authorities not delegated
as discussed above, sources must continue to submit all appropriate
information to the EPA by electronic database portals.
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\2\ This waiver only extends to the submission of copies of
notifications and reports; the EPA does not waive the requirements
in delegated standards that require notifications and reports be
submitted to an electronic database (e.g., 40 CFR part 63, subpart
HHHHHHH).
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XII. How will unchanged authorities be delegated to ODEQ in the future?
As stated in previous NESHAP delegation actions, the EPA has
approved Oklahoma's mechanism of incorporation by reference of NESHAP
standards into ODEQ regulations, as they apply to both part 70 and non-
part 70 sources. See, e.g., 61 FR 4224 (February 5, 1996) and 66 FR
1584 (January 9, 2001). Consistent with the EPA regulations and
guidance,\3\ ODEQ may request future updates to Oklahoma's NESHAP
delegation by submitting a letter to the EPA that appropriately
identifies the specific NESHAP which have been incorporated by
reference into State rules, reaffirms that it still meets up-front
approval delegation criteria for part 70 sources, and demonstrates that
ODEQ maintains adequate authorities and resources to implement and
enforce the delegated NESHAP requirements for all sources. We will
respond in writing to the request stating that the request for
delegation is either approved or denied. A Federal Register action will
be published to inform the public and affected sources of the updated
delegation, indicate where source notifications and reports should be
sent, and amend the relevant portions of the Code of Federal
Regulations identifying which NESHAP standards have been delegated to
the ODEQ.
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\3\ See Hazardous Air Pollutants: Amendments to the Approval of
State Programs and Delegation of Federal Authorities, Final Rule (65
FR 55810, September 14, 2000); and ``Straight Delegation Issues
Concerning Sections 111 and 112 Requirements and Title V,'' by John
S. Seitz, Director of Air Quality Planning and Standards, EPA, dated
December 10, 1993.
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XIII. Impact on Areas of Indian Country
Following the U.S. Supreme Court decision in McGirt v. Oklahoma,140
S. Ct. 2452 (2020), the Governor of the State of Oklahoma requested
approval under Section 10211(a) of the Safe, Accountable, Flexible,
Efficient Transportation Equity Act of 2005: A Legacy for Users, Public
Law 109-59, 119 Stat. 1144, 1937 (August 10, 2005) (``SAFETEA''), to
administer in certain areas of Indian country (as defined at 18 U.S.C.
1151) the State's environmental regulatory programs that were
previously approved by the EPA outside of Indian country. The State's
request excluded certain areas of Indian country further described
below.
The EPA has approved Oklahoma's SAFETEA request to administer all
of the State's EPA-approved environmental regulatory programs in the
requested areas of Indian country. As requested by Oklahoma, the EPA's
approval under SAFETEA does not include Indian country lands, including
rights-of-way running through the same, that: (1) qualify as Indian
allotments, the Indian titles to which have not been extinguished,
under 18 U.S.C. 1151(c); (2) are held in trust by the United States on
behalf of an individual Indian or Tribe; or (3) are owned in fee by a
Tribe, if the Tribe (a) acquired that fee title to such land, or an
area that included such land, in accordance with a treaty with the
United States to which such Tribe was a party, and (b) never allotted
the land to a member or citizen of the Tribe (collectively ``excluded
Indian country lands'').
The EPA's approval under SAFETEA expressly provided that to the
extent the EPA's prior approvals of Oklahoma's environmental programs
excluded Indian country, any such exclusions are superseded for the
geographic areas of Indian country covered by the EPA's approval of
Oklahoma's SAFETEA request. The approval also provided that future
revisions or amendments to Oklahoma's approved environmental regulatory
programs would extend to the covered areas of Indian country (without
any further need for additional requests under SAFETEA).
As explained above, the EPA is proposing an update to the Oklahoma
NESHAP delegation which will apply statewide in Oklahoma. Consistent
with the EPA's SAFETEA approval, this NESHAP delegation will apply to
areas of Indian country pursuant to the SAFETEA approval, including to
all Indian country in the State of Oklahoma other than the excluded
Indian country lands as described above.
XIV. Proposed Action
In this action, the EPA is proposing to approve an update to the
Oklahoma NESHAP delegation that would provide the ODEQ with the
authority to implement and enforce certain newly incorporated NESHAP
promulgated by the EPA and amendments to existing standards currently
delegated, as they existed though June 30, 2023. This proposed
delegation to ODEQ extends to sources and activities located in certain
[[Page 30616]]
areas of Indian country, as explained in section XIII above.
XV. Statutory and Executive Order Reviews
Under the CAA, the Administrator has the authority to approve
section 112(l) submissions that comply with the provisions of the Act
and applicable Federal regulations. In reviewing section 112(l)
submissions, the EPA's role is to approve state choices, provided that
they meet the criteria and objectives of the CAA and the EPA's
implementing regulations. Accordingly, this action merely proposes to
approve the State's request as meeting Federal requirements and does
not impose additional requirements beyond those imposed by State law.
For that reason, this proposed action:
A. Executive Order 12866: Regulatory Planning and Review and Executive
Order 13563: Improving Regulation and Regulatory Review
This action is not a significant regulatory action as defined in
Executive Order 12866 (58 FR 51735, October 4, 1993) and was therefore
not submitted to the Office of Management and Budget (OMB) for review.
B. Executive Order 14192: Unleashing Prosperity Through Deregulation
This action is not an Executive Order 14192 regulatory action
because this action is not significant under Executive Order 12866.
C. Paperwork Reduction Act (PRA)
This action does not impose an information collection burden under
the PRA (44 U.S.C. 3501 et seq.) because it does not impose an
information collection burden.
D. Regulatory Flexibility Act (RFA)
This action is certified to not have a significant economic impact
on a substantial number of small entities under the RFA (5 U.S.C. 601
et seq. ).This action proposes to approve the delegation of federal
rules as requested by the state agency and will therefore have no net
regulatory burden for all directly regulated small entities.
E. Unfunded Mandates Reform Act (UMRA)
This action does not contain an unfunded mandate as described in
UMRA, 2 U.S.C. 1531-1538, and does not significantly or uniquely affect
small governments. This action imposes no enforceable duty on any
State, local, or tribal governments or the private sector.
F. Executive Order 13132: Federalism
This action does not have Federalism implications as specified in
Executive Order 13132 (64 FR 43255, August 10, 1999). It 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.
G. Executive Order 13175: Consultation and Coordination With Indian
Tribal Governments
This proposed approval of revisions to the Oklahoma SIP that update
the Oklahoma NESHAP delegation will apply, if finalized as proposed, to
certain areas of Indian country throughout Oklahoma as discussed in the
preamble, and therefore has tribal implications as specified in E.O.
13175 (65 FR 67249, November 9, 2000). However, this action will
neither impose substantial direct compliance costs on federally
recognized tribal governments, nor preempt tribal law. This action will
not impose substantial direct compliance costs on federally recognized
tribal governments because no actions will be required of tribal
governments. This action will also not preempt tribal law as no
Oklahoma tribe implements a regulatory program under the CAA, and thus
does not have applicable or related tribal laws. Consistent with the
EPA Policy on Consultation and Coordination with Indian Tribes
(December 7, 2023), the EPA has offered consultation to all 38 Tribal
governments whose lands are located within the exterior boundaries of
the State of Oklahoma and that may be affected by this action and
provided information about this action.
H. Executive Order 13045: Protection of Children From Environmental
Health Risks and Safety Risks
The EPA interprets Executive Order 13045 as applying only to
regulatory actions considered significant under section 3(f)(1) of
Executive Order 12866 and that concern environmental health or safety
risks that EPA has reason to believe may disproportionately affect
children, per the definition of ``covered regulatory action'' in
section 2-202 of Executive Order 13045. This action is not subject to
Executive Order 13045 because it approves a state program.
I. Executive Order 13211: Actions Concerning Regulations That
Significantly Affect Energy Supply, Distribution or Use
This action is not subject to Executive Order 13211 (66 FR 28355,
May 22, 2001), because it is not a significant regulatory action under
Executive Order 12866.
J. National Technology Transfer and Advancement Act (NTTAA)
This rulemaking does not involve technical standards. This action
is not subject to requirements of section 12(d) of the National
Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272 note)
because application of those requirements would be inconsistent with
the Clean Air Act.
List of Subjects
40 CFR Part 61
Environmental protection, Air pollution control, Hazardous
substances, Intergovernmental relations, Radioactive materials,
Reporting and recordkeeping requirements, Uranium, Vinyl chloride.
40 CFR Part 63
Environmental protection, Air pollution control, Administrative
practice and procedure, Business and industry, Carbon oxides, Hazardous
substances, Intergovernmental relations, Nitrogen oxides, Ozone,
Reporting and recordkeeping requirements, Sulfur oxides, Volatile
organic compounds.
Authority: 42 U.S.C. 7401 et seq.
Dated: June 30, 2025.
James McDonald,
Director, Air and Radiation Division, Region 6.
[FR Doc. 2025-12800 Filed 7-9-25; 8:45 am]
BILLING CODE 6560-50-P
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