Notice2025-19988
EPA Determinations of Compliance and Applicability Under Clean Air Act Section 111, 112, and 129 Dashboard: EPA Formal Responses to Inquiries Concerning Compliance With the Clean Air Act Stationary Source Program (Since May 2019)
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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
November 17, 2025
Issuing agencies
Environmental Protection Agency
Abstract
This document announces the availability of applicability determinations, alternative monitoring decisions, and regulatory interpretations made by the Environmental Protection Agency (EPA) with regard to the New Source Performance Standards (NSPS); the National Emission Standards for Hazardous Air Pollutants (NESHAP); the Emission Guidelines and Federal Plan Requirements for existing sources; and/or the Stratospheric Ozone Protection Program.
Full Text
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<title>Federal Register, Volume 90 Issue 219 (Monday, November 17, 2025)</title>
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[Federal Register Volume 90, Number 219 (Monday, November 17, 2025)]
[Notices]
[Pages 51312-51315]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2025-19988]
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ENVIRONMENTAL PROTECTION AGENCY
[EPA-HQ-OAR-2025-0486; FRL-12870-01-OAR]
EPA Determinations of Compliance and Applicability Under Clean
Air Act Section 111, 112, and 129 Dashboard: EPA Formal Responses to
Inquiries Concerning Compliance With the Clean Air Act Stationary
Source Program (Since May 2019)
AGENCY: Environmental Protection Agency (EPA).
ACTION: Notice of availability.
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SUMMARY: This document announces the availability of applicability
determinations, alternative monitoring decisions, and regulatory
interpretations made by the Environmental Protection Agency (EPA) with
regard to the New Source Performance Standards (NSPS); the National
Emission Standards for Hazardous Air Pollutants (NESHAP); the Emission
Guidelines and Federal Plan Requirements for existing sources; and/or
the Stratospheric Ozone Protection Program.
FOR FURTHER INFORMATION CONTACT: For questions about the Clean Air Act
(CAA) section 111, 112, and 129 Dashboard or this document, contact
Diana Felix, Air Quality Policy Division, Operating Permits Group;
telephone number: (919) 541-7627; email address: <a href="/cdn-cgi/l/email-protection#99fffcf5f0e1b7fdf0f8f7f8d9fce9f8b7fef6ef"><span class="__cf_email__" data-cfemail="a4c2c1c8cddc8ac0cdc5cac5e4c1d4c58ac3cbd2">[email protected]</span></a>.
An electronic copy of each complete document posted on the CAA
section 111, 112, and 129 Dashboard, which contains determinations
signed after May 2019, is available on the internet through the
Resources and Guidance Documents for Compliance Assistance page of the
CAA Compliance Monitoring website under ``Air'' at: <a href="https://www.epa.gov/complying-air-emissions-standards-stationary-sources/epa-determinations-compliance-and">https://www.epa.gov/complying-air-emissions-standards-stationary-sources/epa-determinations-compliance-and</a>. All previously issued responses are
posted on the Applicability Determination Index (ADI) data system
available on the internet through the Resources and Guidance Documents
for Compliance Assistance page of the CAA Compliance Monitoring website
under ``Air'' at: <a href="https://www.epa.gov/compliance/resources-and-guidance-documents-compliance-assistance">https://www.epa.gov/compliance/resources-and-guidance-documents-compliance-assistance</a>.
The letters and memoranda on the CAA section 111, 112, and 129
Dashboard may be located by facility name, affected subpart, or by
response date and is searchable by string word searches.
SUPPLEMENTARY INFORMATION:
General Information
The General Provisions of the NSPS in 40 Code of Federal
Regulations (CFR) part 60 and the General Provisions of the NESHAP in
40 CFR part 61 provide that a source owner or operator may request a
determination of whether certain intended actions constitute the
commencement of construction, reconstruction, or modification. 40 CFR
60.5 and 61.06. The General Provisions in part 60 also apply to Federal
and EPA-approved state plans for existing sources in 40 CFR part 62.
See 40 CFR 62.02(b)(2). The EPA's written responses to source or
facility-specific inquiries on provisions in parts 60, 61 and 62 are
commonly referred to as applicability determinations. Although the
NESHAP part 63 regulations [which include Maximum Achievable Control
Technology (MACT) standards and/or Generally Available Control
Technology (GACT) standards] contain no specific regulatory provision
providing that sources may request applicability determinations, the
EPA also responds to written inquiries regarding applicability for the
40 CFR part 63 regulations. In addition, the General Provisions in
parts 60 and 63 allow sources to seek permission to use monitoring or
recordkeeping that is different from the promulgated requirements. See
40 CFR 60.13(i), 61.14(g), 63.8(b)(1), 63.8(f), and 63.10(f). The EPA's
written responses to these inquiries are commonly referred to as
alternative monitoring decisions. Furthermore, the EPA responds to
written inquiries about the broad range of regulatory requirements in
40 CFR parts 60 through 63 as they pertain to a whole source category.
These inquiries may pertain, for example, to the type of sources to
which the regulation applies, or to the testing, monitoring,
recordkeeping, or reporting requirements contained in the regulation.
The EPA's written responses to these inquiries are commonly referred to
as regulatory interpretations.
The EPA previously compiled EPA-issued NSPS and NESHAP
applicability determinations, alternative monitoring decisions, and
regulatory interpretations, and posted them to the ADI. As of October
2, 2023, the EPA determinations of compliance and applicability under
CAA section 111, 112, and 129 will be posted to the CAA section 111,
112, and 129 Dashboard. The CAA section 111, 112, and 129 Dashboard is
a data system, accessed via the internet, containing all determinations
signed after May 2019.
This document comprises a list of 62 such documents added to the
CAA section 111, 112, and 129 Dashboard on June 25, 2025. This document
lists the title of each letter and memorandum. Complete copies of these
documents may be obtained from the CAA section 111, 112 and 129
Dashboard on the internet through the Resources and Guidance Documents
for Compliance Assistance page of the CAA Compliance Monitoring website
under ``Air'' at: <a href="https://www.epa.gov/compliance/resources-and-guidance-documents-compliance-assistance">https://www.epa.gov/compliance/resources-and-guidance-documents-compliance-assistance</a>.
[[Page 51313]]
Applicability Determinations, Alternative Monitoring Plans and Regulatory Interpretations Uploaded to CAA
Section 111, 112, and 129 Dashboard on June 25, 2025
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Facility name Title Affected subpart Date of response
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ANR Pipeline Company Sulphur Alternative Monitoring for 40 CFR part 63, subpart 2025-06-13
Springs and LaGrange Compressor Stationary Gas Turbines. YYYY.
Stations.
Eagle Butte Co-op Incinerator...... Applicability Determination 40 CFR part 60, subpart 2025-05-28
for Commercial and CCCC.
Industrial Solid Waste
Incineration Units.
Gulf South Pipeline Company, LLC-- Alternative Monitoring for 40 CFR part 63, subpart 2025-05-19
McComb Compressor Station. Stationary Gas Turbines. YYYY.
North Omaha Station................ Performance Test Waiver for 40 CFR part 63, subpart 2025-05-19
Coal- and Oil-Fired UUUUU.
Electric Utility Steam
Generating Unit.
Clean Harbors--Kimball NE.......... Alternative Monitoring for 40 CFR part 63, subpart EEE 2025-05-14
Hazardous Waste Combustors.
QSS Biosolids, LLC................. Applicability Determination 40 CFR part 60, subpart 2025-05-13
for Sewage Sludge LLLL; 40 CFR part 60,
Incineration Units. subpart CCCC.
Citgo Corpus Christi East Refinery. Alternative Monitoring for 40 CFR part 60, subpart Ja. 2025-04-25
Petroleum Refineries.
Heartland Corn Products............ Request for Operating 40 CFR part 63, subpart 2025-04-22
Limits/Monitoring YYYY.
Petitions for Stationary
Gas Turbines.
Potlatch Deltic Saint Marie's...... Regulatory Interpretation 40 CFR part 63, subpart 2025-03-13
for Industrial, DDDDD.
Commercial, and
Institutional Boilers and
Process Heaters.
Domtar AW LLC--Ashdown AR.......... Applicability Determination 40 CFR part 60, subpart BB; 2025-03-10
for Kraft Pulp Mills. 40 CFR part 63, subpart S.
Birmingham Airport Authority....... Applicability Determination 40 CFR part 60, subpart 2025-03-10
for Other Solid Waste EEEE.
Incineration Units.
Duke Energy........................ Regulatory Interpretation 40 CFR part 63, subpart 2025-02-27
for Stationary ZZZZ.
Reciprocating Internal
Combustion Engines.
Dow Chemical--Freeport, TX......... Alternative Monitoring for 40 CFR part 63, subpart JJJ 2025-01-08
Polymers and Resins.
Arbor Management Specialist........ Applicability Determination 40 CFR part 60, subpart 2024-12-10
for Commercial and CCCC.
Industrial Solid Waste
Incineration Units.
Shuqualak Lumber Company........... Alternative Monitoring for 40 CFR part 63, subpart 2024-12-05
Industrial, Commercial, DDDDD.
and Institutional Boilers
and Process Heaters.
Chem Plate Industries.............. Applicability Determination 40 CFR part 61, subpart E.. 2024-10-10
for Sludge Drying
Operation.
Primient Lafayette................. Alternative Monitoring for 40 CFR part 63, subpart 2024-09-26
Stationary Gas Turbines. YYYY.
Kaiser Aluminum Spokane Valley..... Regulatory Interpretation 40 CFR part 63, subpart RRR 2024-09-09
for Secondary Aluminum
Production.
Consumers Muskegon River Compressor Alternative Operating 40 CFR part 63, subpart 2024-09-05
Station. Limits/Monitoring for YYYY.
Stationary Combustion
Turbines.
Oil Energy Systems Inc............. Applicability Determination 40 CFR part 60, subpart 2024-09-05
for Other Solid Waste EEEE.
Incineration Units.
Sonoma Ecology Center (SEC)........ Applicability Determination 40 CFR part 60, subpart 2024-08-22
for Other Solid Waste EEEE.
Incineration.
Platte Generating Station.......... Alternative Recordkeeping/ 40 CFR part 63, subpart 2024-08-22
Reporting for Coal- and UUUUU.
Oil-Fired Electric Utility
Steam Generating Unit.
Cerro Colorado Landfill--City of Alternative Monitoring for 40 CFR part 60, subpart Cf. 2024-08-07
Albuquerque. MSW Landfills.
Aurora Energy...................... Alternative Reporting for 40 CFR part 63, subpart 2024-08-01
Oil and Gas Exploration JJJJJJ.
and Production Operation.
Lon D Wright Power Plant........... Alternative Reporting and 40 CFR part 63, subpart 2024-08-01
Recordkeeping Requirements UUUUU.
for Coal-Fired Power Plant.
Monarch Ceramic Tile............... Applicability Determination 40 CFR part 60, subpart OOO 2024-07-02
for Nonmetallic Mineral
Processing Plant.
North Wake Landfill................ Alternative Landfill Gas 40 CFR part 62, subpart 2024-07-02
Flowrate Calculation OOO; 40 CFR part 63,
Procedures for NSWL. subpart AAAA.
Nebraska City Station and North Alternative Recordkeeping 40 CFR part 63, subpart 2024-07-01
Omaha Station. and Reporting for MATS. UUUUU.
Savant Alaska...................... Alternative Reporting for 40 CFR part 60, subpart 2024-07-01
Oil and Gas Exploration OOOOa.
and Production Operation.
[[Page 51314]]
Enerfin Resources Northwest........ Alternative Monitoring for 40 CFR part 63, subpart HH. 2024-06-17
Measurement of VHAP.
CLECO Brame Energy Center--Madison Performance Test Waiver for 40 CFR part 63, subpart 2024-06-13
Units 3-1_3-2. Coal- and Oil-Fired UUUUU; 40 CFR part 63,
Electric Utility Steam subpart A.
Generating Units.
ANR Pipeline Sulphur Springs CS.... Alternative Operating 40 CFR part 63, subpart 2024-06-04
Limits/Monitoring for YYYY.
Stationary Combustion
Turbines.
Brown County South Landfill........ Applicability Determination 40 CFR part 60, subpart XXX 2024-05-13
for Municipal Solid Waste.
DTE Gas Company--Belle River Mills, Alternative Operating 40 CFR part 63, subpart 2024-05-02
Milford, and Willow Run. Limits/Monitoring for YYYY.
Stationary Combustion
Turbines.
GVEA Healy......................... Alternative Test Dates for 40 CFR part 63, subpart 2024-04-25
MATS. UUUUU.
BP Pipelines (North America) Inc... Applicability Determination 40 CFR part 60, subpart Ja. 2024-04-15
for Petroleum Refinery.
Amgen Manufacturing, Limited....... Performance Test Extension 40 CFR part 60, subpart 2024-04-11
for Stationary Combustion KKKK:.
Turbine.
Alyeska Valdez Marine Terminal..... Applicability Determination 40 CFR part 63, subpart 2024-04-04
for Municipal Waste EEEE; 40 CFR part 63,
Combustors. subpart SS.
City of Spokane Waste to Energy Other: Force Majeure....... 40 CFR part 60, subpart Eb; 2024-04-03
Facility. 40 CFR part 60, subpart Cb.
Diversified Vapor Technologies..... Alternative Monitoring Plan 40 CFR part 60, subpart J; 2024-03-27
and Performance Waiver for 40 CFR part 60, subpart Ja.
Petroleum Refineries.
MSU Simon Turbine.................. Applicability Determination 40 CFR part 63, subpart 2024-03-25
for Stationary Combustion YYYY.
Turbines.
Dow Chemical Plaquemine Operations. Applicability Determination 40 CFR part 63, subpart 2024-03-18
for MON. FFFF.
U.S. Steel--Keetac................. Applicability Determination 40 CFR part 63, subpart 2024-02-26
for Ore Processing. RRRRR.
Consumers Energy's Muskegon River Applicability Determination 40 CFR part 63, subpart 2024-02-21
Compressor Station. for Stationary Combustion YYYY.
Turbines.
DTE Marietta....................... Applicability Determination 40 CFR part 63, subpart 2024-02-21
for Stationary Combustion YYYY.
Turbines.
ANR Pipeline Company (ANR) LaGrange Applicability Determination 40 CFR part 63, subpart 2024-02-20
Compressor Station. for Stationary Combustion YYYY.
Turbines.
Seepex, Inc........................ Applicability Determination 40 CFR part 63, subpart 2024-01-25
for Nine Metal Fabrication XXXXXX.
and Finishing Source
Categories.
Cleveland--Cliffs Minorca Mine Inc. Alternative Monitoring 40 CFR part 63, subpart 2024-01-19
Request for Taconite Iron RRRRR; 40 CFR part 60,
Ore Processing Units. subpart BBa; 40 CFR part
63, subpart MM.
Applied Gaia B3 Continuous Applicability Determination 40 CFR part 60, subpart 2024-01-09
Pyrolysis Machine (Biochar for the Other Solid Waste EEEE.
Reactor). Incineration Units.
Corteva Midland Michigan........... Applicability Determination 40 CFR part 63, subpart F; 2023-12-12
Regarding the Distillation 40 CFR part 60, subpart
of a SOCMI-listed Chemical. VVa; 40 CFR part 63,
subpart G.
DTE Gas Company, Milford Compressor Alternative Monitoring for 40 CFR part 63, subpart 2023-12-08
Station. Stationary Gas Turbines. YYYY.
DTE Gas Company, Willow Compressor Alternative Monitoring for 40 CFR part 63, subpart 2023-12-08
Station. Stationary Gas Turbines. YYYY.
DTE Gas Company, Belle River Alternative Monitoring for 40 CFR part 63, subpart 2023-12-08
Compressor Station. Stationary Gas Turbines. YYYY.
Primary Products Ingredients Alternative Monitoring for 40 CFR part 63, subpart 2023-12-08
Americas LLC--Primient South. Stationary Gas Turbines. YYYY.
MSU Simon Power Plant.............. Alternative Operating 40 CFR part 63, subpart 2023-12-08
Limits/Monitoring for YYYY.
Stationary Combustion
Turbines.
Consumers Energy Company--Muskegon Alternative Operating 40 CFR part 63, subpart 2023-11-07
River Compressor Station. Limits/Monitoring for YYYY.
Stationary Combustion
Turbines.
DTE Marietta....................... Alternative Operating 40 CFR part 63, subpart 2023-11-07
Limits/Monitoring for YYYY.
Stationary Combustion
Turbines.
Cottonwood Hills RDF............... Other Request for MSW 40 CFR part 63, subpart 2023-10-31
Landfills. AAAA.
DTE Greenwood Energy Center........ Applicability Determination 40 CFR part 63, subpart 2023-10-24
for Electric Generating DDDDD; 40 CFR part 63,
Unit. subpart UUUUU.
Baxter Healthcare of Puerto Rico... Performance Test Extension 40 CFR part 60, subpart 2023-10-10
for Stationary Spark JJJJ.
Ignition Internal
Combustion Engines.
Holmes Regional Medical Center..... Alternative Testing for 40 CFR part 63, subpart 2023-10-05
Stationary Compression ZZZZ; 40 CFR part 60,
Combustion Engine. subpart IIII.
Magellan Pipeline Company, L.P.-- Test Extension Request for 40 CFR part 63, subpart 2023-09-18
Osborn Station. Reciprocating Internal ZZZZ.
Combustion Engine.
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[[Page 51315]]
Panagiotis Tsirigotis,
Director, Office of Air Quality Planning and Standards.
[FR Doc. 2025-19988 Filed 11-14-25; 8:45 am]
BILLING CODE 6560-50-P
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</html>Indexed from Federal Register on November 17, 2025.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.