|
The EPA's interim release for FOIA request 2025-EPA-04883 discusses the challenges of meeting QA/QC criteria for Continuous Emission Monitoring Systems (CEMS) at low particulate matter levels, specifically regarding Coyote Station's compliance and the associated costs and vendor limitations.
|
2026 |
2025-EPA-04883 |
0005970
|
1 |
|
On March 28, 2025, Talen Montana, LLC and NorthWestern Corporation submitted a request to the EPA for a Presidential exemption from the 2024 MATS Rule for the Colstrip Steam Electric Station, citing technological unavailability and national security interests.
|
2025 |
2025-EPA-04193 |
0001246–0001257
|
12 |
|
On March 31, 2025, Nick Bound of Ameren Missouri submitted a request for a Presidential Exemption under CAA Section 112(i)(4) regarding EPA's final rule on National Emission Standards for Hazardous Air Pollutants for coal- and oil-fired electric utility steam generating units.
|
2025 |
2025-EPA-04883 |
0005280
|
1 |
|
On March 31, 2025, GVEA submitted a Presidential Exemption Request regarding the Healy Power Plant, detailing challenges in maintaining PM emissions compliance under new EPA standards and the technical infeasibility of achieving valid PM correlations.
|
2025 |
2025-EPA-04883 |
0005605
|
1 |
|
SunCoke requested a two-year exemption from the 0.0 percent leaking door requirement under the Coke Ovens Rule, citing national security interests related to domestic steel production and the critical role of its coke in various industries.
|
2025 |
2025-EPA-04883 |
0005658
|
1 |
|
A 2025 communication regarding EPA's compliance deadline indicates that SunCoke cannot meet the 18-month timeline for new emission limits due to underestimated costs and necessary technological upgrades.
|
2025 |
2025-EPA-04883 |
0005767
|
1 |
|
On March 31, 2025, Tony Germinario of BASF Corporation provided a table detailing specific facilities, emissions standards, and compliance periods to various EPA officials, including Aaron Szabo and Abigale Tardif, under FOIA request 2025-EPA-04883.
|
2025 |
2025-EPA-04883 |
0005804
|
1 |
|
U.S. Environmental Protection Agency interim release dated March 31, 2025, detailing emissions standards and compliance periods for BASF Corporation facilities under FOIA request 2025-EPA-04883.
|
2025 |
2025-EPA-04883 |
0005805
|
1 |
|
A request for a two-year exemption from the revised MATS rule emissions standard for Bay Shore Unit 1 was submitted by Vincent J. Brisini, Director of Environmental Affairs at Olympus Power, citing concerns over electric grid reliability and economic viability.
|
2025 |
2025-EPA-04883 |
0006046
|
1 |
|
EPA FOIA request 2025-EPA-04883 details Schuylkill Energy Resources, Inc.'s request for delayed compliance until July 6, 2029, regarding emissions limitations for its St. Nicholas Cogeneration Project, citing technical and financial challenges.
|
2025 |
2025-EPA-04883 |
0006081
|
1 |
|
Justification for exemption from the 0.01 lb/MMBtu emission limit discusses technical feasibility issues related to compliance methods for low emitting EGU's and the challenges of using PM continuous emission monitors.
|
2025 |
2025-EPA-04883 |
0006082
|
1 |
|
On March 28, 2025, Talon Montana, LLC and NorthWestern Corporation submitted a request to the EPA for a Presidential Exemption from the 2024 MATS Rule for the Colstrip Steam Electric Station, citing unavailability of technology and national security interests.
|
2025 |
2025-EPA-04883 |
0006085
|
1 |
|
Talen Energy submitted a report on March 28, 2025, detailing the technological and economic challenges Colstrip faces in meeting the 2024 MATS rule, arguing that compliance is technologically and economically 'unavailable' and citing national security concerns.
|
2025 |
2025-EPA-04883 |
0006086
|
1 |
|
On March 28, 2025, Talen Energy submitted a report stating that the technology to implement the 2024 MATS Rule at Colstrip is unavailable, citing challenges with integrating baghouses with existing pollution control systems.
|
2025 |
2025-EPA-04883 |
0006089
|
1 |
|
Talen Montana's March 28, 2025, declaration in support of a judicial stay of the 2024 MATS Rule indicates projected compliance costs exceeding $500 million, with ongoing operational expenses and potential plant shutdowns due to financial unavailability.
|
2025 |
2025-EPA-04883 |
0006090
|
1 |
|
A March 28, 2025, declaration from NorthWestern Energy discusses challenges related to compliance with the 2024 MATS Rule and the potential impact of the EPA's GHG Rule on the Colstrip power plant's operations and financial viability.
|
2025 |
2025-EPA-04883 |
0006091
|
1 |
|
Talen Energy's March 28, 2025 communication outlines challenges in meeting the July 6, 2027 compliance deadline for the MATS Rule at Colstrip, citing labor shortages, weather impacts, and supply chain issues.
|
2025 |
2025-EPA-04883 |
0006092
|
1 |
|
On March 28, 2025, the Department of Environmental Quality granted a one-year extension for the Colstrip project, citing national security interests to exempt it from compliance with the 2024 MATS Rule as per Executive Order 14156.
|
2025 |
2025-EPA-04883 |
0006093
|
1 |
|
EPA's analysis of fPM emission reductions from Colstrip power plant units indicates significant assumptions regarding maintenance and technology performance, questioning the feasibility of achieving proposed emission limits.
|
2025 |
2025-EPA-04883 |
0006112
|
1 |
|
EPA's cost analysis for Colstrip's compliance with proposed f-PM limits indicates annual costs of approximately $38 million for the 0.010 lb/MMBtu standard, raising concerns about the fairness of the proposed rule.
|
2025 |
2025-EPA-04883 |
0006111
|
1 |
|
EPA's interim release for FOIA request 2025-EPA-04883 discusses the costs and operational impacts of PM Continuous Emissions Monitoring Systems (CEMS) on coal-fired power plants, particularly focusing on Colstrip's Units 3 and 4.
|
2025 |
2025-EPA-04883 |
0006121
|
1 |
|
Final Rule Strengthens MATS establishes a tighter filterable particulate matter standard of 0.010 lb/MMBtu and a mercury emission standard of 1.2 lb/TBtu, effective for all non-lignite-fired electric generating units.
|
2025 |
2025-EPA-04883 |
0006303
|
1 |
|
On March 28, 2025, Cedric F. Green of Dominion Energy submitted a request to the EPA for a two-year Presidential Exemption under Section 112(i)(4) of the Clean Air Act for the Mt. Storm Power Station in West Virginia, citing national security concerns related to compliance with the revised fPM standard.
|
2025 |
2025-EPA-04883 |
0012743–0012748
|
6 |
|
On March 31, 2025, Thomas M. Alban of Cardinal Operating Company submitted the 2024 Annual Consent Decree Report to Kathy Milenkovski of American Electric Power, including stack tests, allowance surrender confirmation, particulate monitor data, and an EV reimbursement summary.
|
2025 |
2025-EPA-04883 |
0014837
|
1 |
|
On April 16, 2025, City Water, Light and Power of Springfield, Illinois, submitted a request to EPA Administrator Lee Zeldin for a two-year exemption from the 2024 MATS rule for Dallman Unit 4, citing technological unavailability and the unit's critical role in regional grid reliability.
|
2025 |
2025-EPA-04883 |
0014840–0014842
|
3 |
|
A letter from Gcor2ianna R. Stenger, Assistant Manager at Keystone-Conemaugh Projects, submitted to the EPA on September 10, 2025, requests an extension of compliance deadlines for nonmercury metal emissions technologies, citing national security concerns regarding electric grid reliability.
|
2024 |
2025-EPA-04883 |
0005634
|
1 |
|
SunCoke submitted a request to the EPA on September 10, 2025, for a two-year exemption from compliance with MACT floor emission limits for coke ovens and bypass vent stacks due to technological infeasibility.
|
2024 |
2025-EPA-04883 |
0005671
|
1 |
|
On July 5, 2024, the EPA finalized a rule establishing 17 new MACT floor emission limits for Hazardous Air Pollutants, affecting SunCoke's operations, with a compliance deadline of December 5, 2025.
|
2024 |
2025-EPA-04883 |
0005778
|
1 |
|
USCA Case #24-1287 filed on 09/30/2024 discusses EPA's failure to include relevant data in setting new MACT floor limits, impacting SunCoke's ability to comply with testing and control requirements.
|
2024 |
2025-EPA-04883 |
0005785
|
1 |
|
USCA Case #24-1287 filed on 09/30/2024 discusses SunCoke's need to install emissions controls at its HH1 facility to comply with new MACT floor limits for mercury and particulate matter.
|
2024 |
2025-EPA-04883 |
0005787
|
1 |
|
USCA Case #24-1287 filed on September 30, 2024, discusses potential compliance costs for SunCoke, estimating up to $1.2 billion for facility upgrades by the December 5, 2025 deadline.
|
2024 |
2025-EPA-04883 |
0005791
|
1 |
|
USCA Case #24-1287 filed on 09/30/2024 discusses SunCoke's PAH emissions testing results from June 2017, indicating marginal compliance with MACT floor limits and potential costs of $260 million for necessary corrections.
|
2024 |
2025-EPA-04883 |
0005790
|
1 |
|
USCA Case #24-1287 filed on 09/30/2024 discusses SunCoke's compliance challenges with new MACT vent stack emissions limits and its critical role in supplying coke to the U.S. steel industry.
|
2024 |
2025-EPA-04883 |
0005795
|
1 |
|
Minnkota's testing indicates that the brominated PAC technology is ineffective for consistent mercury emissions control at Coyote Station, failing to meet the new compliance standards by the July 6, 2027 deadline.
|
2024 |
2025-EPA-04883 |
0005968
|
1 |
|
On September 10, 2025, Panther Creek Power submitted an exemption request to EPA Administrator Lee Zeldin regarding the MATS Rule, seeking additional time to comply with emission standards for coal- and oil-fired electric utility steam generating units.
|
2024 |
2025-EPA-04883 |
0006040
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses the contentious compliance issues among Colstrip's owners regarding the MATS Final Rule and the potential financial implications of emissions control installations.
|
2024 |
2025-EPA-04883 |
0006169
|
1 |
|
USCA Case #24-1190 filed on 06/27/2024 discusses financial risks and disputes among Colstrip owners regarding compliance with the MATS Final Rule and the implications of installing new emissions control systems.
|
2024 |
2025-EPA-04883 |
0006178
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses the MATS Final Rule's stringent fPM limits, requiring Colstrip to potentially invest over $350 million in new emissions control systems or face premature retirement by July 8, 2027.
|
2024 |
2025-EPA-04883 |
0006179
|
1 |
|
Burns & McDonnell's April 2024 evaluation outlines Talen Montana's ongoing efforts to estimate costs and engineering for pollution control equipment to comply with the MATS Final Rule, anticipating a $350 million project timeline extending to 2027.
|
2024 |
2025-EPA-04883 |
0006180
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses the implications of the MATS Final Rule on Talen Montana and Colstrip owners regarding compliance deadlines and potential disputes over pollution control investments.
|
2024 |
2025-EPA-04883 |
0006181
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses Talen Montana's inability to recoup compliance costs for the MATS Final Rule, estimating annualized capital costs of $109 million to $133 million, potentially leading to Colstrip's premature retirement.
|
2024 |
2025-EPA-04883 |
0006183
|
1 |
|
USCA Case #24-1190 filed on 06/27/2024 discusses Talen Montana's operational risks and compliance efforts at Colstrip, noting its fPM emissions consistently below EPA's MATS limit since 2018.
|
2024 |
2025-EPA-04883 |
0006184
|
1 |
|
USCA Case #24-1190 filed on June 27, 2024, discusses Talen Montana's compliance efforts with the MATS Final Rule and the implications for Colstrip's owners amid potential disputes and significant costs.
|
2024 |
2025-EPA-04883 |
0006186
|
1 |
|
USCA Case #24-1190 filed on 06/27/2024 discusses the potential economic impacts of the MATS Final Rule on Talen Montana and the Colstrip plant, emphasizing the urgency of decisions amid ongoing litigation.
|
2024 |
2025-EPA-04883 |
0006187
|
1 |
|
A confidential evaluation report titled 'Co'strip Particulate Matter Control Cost Evaluation - Final,' prepared by Burns & McDonnell for Talen Montana, was filed on June 27, 2024, under USCA Case #24-1190.
|
2024 |
2025-EPA-04883 |
0006191
|
1 |
|
Final evaluation report on Colstrip Steam Electric Station emissions control technologies, including cost analyses and descriptions of Pulse-Jet Fabric Filters and Dry Electrostatic Precipitators, filed under USCA Case #24-1190 on April 29, 2024.
|
2024 |
2025-EPA-04883 |
0006192
|
1 |
|
The April 29, 2024, evaluation report for Colstrip Units 3 and 4 outlines operation and maintenance cost estimates for particulate emissions control options, recommending fabric filters with a total capital cost of $356,426,000 and an annual O&M cost of $14,786,000.
|
2024 |
2025-EPA-04883 |
0006195
|
1 |
|
The April 29, 2024, report evaluates compliance options for reducing filterable particulate matter emissions at the Colstrip Steam Electric Station in Montana, detailing cost estimates for installing new pollution control technologies.
|
2024 |
2025-EPA-04883 |
0006196
|
1 |
|
Final evaluation of emission reduction technologies for the Colstrip facility, detailing the pulse-jet fabric filter and electrostatic precipitator as potential solutions to meet MATS particulate emissions regulations, dated April 29, 2024.
|
2024 |
2025-EPA-04883 |
0006198
|
1 |
|
Final evaluation of emission guarantees for the Colstrip facility, dated April 29, 2024, discusses the atypical configuration of a wet particulate scrubber and the confidence of Southern Environmental Inc in meeting proposed MATS rates.
|
2024 |
2025-EPA-04883 |
0006204
|
1 |
|
Cost evaluation report for control technologies at Colstrip, detailing capital and operational costs based on vendor estimates, prepared by Burns & McDonnell, dated April 29, 2024, under FOIA ID 2025-EPA-04883.
|
2024 |
2025-EPA-04883 |
0006205
|
1 |
|
Final cost evaluation for the Colstrip Power Station's fabric filter and ESP, detailing capital costs and project estimates, filed in USCA Case #24-1190 on April 29, 2024.
|
2024 |
2025-EPA-04883 |
0006206
|
1 |
|
Final evaluation report for particulate matter control at Colstrip, dated April 29, 2024, detailing operation and maintenance costs, emission rates, and economic impacts for control technologies, filed under USCA Case #24-1190.
|
2024 |
2025-EPA-04883 |
0006211
|
1 |
|
A report discusses the financial implications and operational challenges for Colstrip Units 3 and 4 under the proposed regulations, concluding that compliance costs may necessitate their retirement by January 1, 2032.
|
2024 |
2025-EPA-04883 |
0006223
|
1 |
|
The U.S. Environmental Protection Agency released a final report on April 25, 2024, analyzing the economic implications of the revised Mercury Air and Toxics Standards on Montana's Colstrip Steam Electric Station and its associated coal mine.
|
2024 |
2025-EPA-04883 |
0006227
|
1 |
|
Minnkota Power Cooperative's May 22, 2024 report details mercury emissions control strategies for the Milton R. Young Station, emphasizing the feasibility of over 90% Hg removal using brominated activated carbon at specified injection rates.
|
2024 |
2025-EPA-04883 |
0006327
|
1 |
|
Minnkota Power Cooperative's May 22, 2024 report details a test campaign for Milton R. Young Station Units 1 and 2, conducted from November 2023 to April 2024, evaluating mercury emissions and fuel additive systems, concluding that the units cannot meet the proposed MATS limit of 1.2 lb/TBtu.
|
2024 |
2025-EPA-04883 |
0006326
|
1 |
|
EPA's May 22, 2024, report on Minnkota Power Cooperative's Milton R Young Station Units 1 and 2 details flaws in cost analysis for mercury compliance, including discrepancies in estimated sorbent injection rates and costs.
|
2024 |
2025-EPA-04883 |
0006333
|
1 |
|
EPA's May 22, 2024 report details cost estimates for fuel additives at Minnkota Power Cooperative's Milton R. Young Station, indicating significant discrepancies in projected versus actual costs for compliance with mercury emissions standards.
|
2024 |
2025-EPA-04883 |
0006334
|
1 |
|
Minnkota Power Cooperative's May 22, 2024 report outlines the need for new equipment and a separate silo for Milton R. Young Station Unit 2 to achieve higher PAC injection rates for mercury control, estimating significant costs not accounted for by the EPA.
|
2024 |
2025-EPA-04883 |
0006336
|
1 |
|
The EPA's May 22, 2024 report outlines revisions to the MATS RTR, including new mercury limits for lignite-fired power plants and reduced limits for filterable particulate matter, with compliance required within three years of the final rule's effective date.
|
2024 |
2025-EPA-04883 |
0006369
|
1 |
|
EPA's interim release dated September 10, 2025, discusses the challenges and costs associated with compliance for the revised mercury and particulate matter standards at the Oak Grove Power Plant, citing technological limitations and potential impacts on grid reliability.
|
2023 |
2025-EPA-04883 |
0005927
|
1 |
|
Comments submitted to the EPA regarding the proposed 0.010 lb/MMBtu fPM limit for coal-fired units, advocating for a subcategory for Colstrip and suggesting a more achievable limit of 0.025 lb/MMBtu.
|
2023 |
2025-EPA-04883 |
0006118
|
1 |
|
Burns & McDonnell's June 23, 2023 report discusses particulate matter (fPM) compliance and potential control technologies for Colstrip power units, evaluating options to meet the proposed MATS limit of 0.010 lb fPM/mmBtu.
|
2023 |
2025-EPA-04883 |
0006129
|
1 |
|
Summary of capital, operation, and maintenance costs for particulate emissions control methods at Colstrip, detailing emission rates, reduction estimates, and associated costs as of June 23, 2023, under FOIA request 2025-EPA-04883.
|
2023 |
2025-EPA-04883 |
0006134
|
1 |
|
A summary table from the EPA dated June 23, 2023, outlines capital, operation and maintenance, and levelized costs for particulate emissions control methods at Colstrip, detailing emission rates, annual emissions, and associated costs.
|
2023 |
2025-EPA-04883 |
0006135
|
1 |
|
Summary of capital, operation and maintenance, and levelized costs for particulate emissions control methods at Colstrip, including emission rates and economic impacts, dated June 23, 2023, under FOIA ID 2025-EPA-04883.
|
2023 |
2025-EPA-04883 |
0006136
|
1 |
|
The EPA's interim release for FOIA request 2025-EPA-04883 discusses the technological limitations of PM Continuous Emission Monitoring Systems (CEMS) in meeting new emissions standards and the potential impacts on North Dakota's energy generation and national security.
|
2023 |
2025-EPA-04883 |
0006319
|
1 |
|
Minnkota Power Cooperative's June 23, 2023 report evaluates mercury emissions and coal quality variability from the Center Mine, detailing capture efficiencies of different emission control technologies and limitations of existing systems.
|
2023 |
2025-EPA-04883 |
0006348
|
1 |
|
Minnkota Power Cooperative's June 23, 2023 report evaluates mercury control strategies for the Milton R Young Station Unit 2, discussing the feasibility of achieving a 1.2 lb/TBtu Hg emission rate and necessary modifications for compliance.
|
2023 |
2025-EPA-04883 |
0006349
|
1 |
|
Minnkota Power Cooperative's June 23, 2023, evaluation report assesses the PM and Hg control technologies at Milton R Young Station Unit 2, indicating that existing technologies cannot meet the proposed emissions limits set by the April 24, 2023, MATS rule.
|
2023 |
2025-EPA-04883 |
0006352
|
1 |
|
EPA FOIA record 2025-EPA-04883 discusses the immediate need for Minnkota to upgrade its electrostatic precipitator (ESP) to comply with the new fPM Limitation, detailing timelines and vendor availability for compliance efforts.
|
2023 |
2025-EPA-04883 |
0006387
|
1 |
|
A performance test report from Talen Montana details measures taken at the Colstrip facility to optimize scrubber and combustion processes for compliance with particulate matter limits, noting annual emissions of approximately 0.022 lb/MMBtu in 2022.
|
2022 |
2025-EPA-04883 |
0006102
|
1 |
|
A 2022 analysis by B&M estimates the annualized costs for a new facility at Colstrip to range from $90.3M to $104.9M, significantly exceeding EPA's estimate of $538M, with detailed cost-effectiveness evaluations for various control options.
|
2022 |
2025-EPA-04883 |
0006117
|
1 |
|
Comments from GVEA regarding the technical infeasibility of meeting the amended mercury emissions standard at Healy Unit 1 and Unit 2, citing challenges with PM CEMS and mercury monitoring equipment, dated March 2025, FOIA ID 2025-EPA-04883.
|
2018 |
2025-EPA-04883 |
0005599
|
1 |
|
The 2018 EPA report discusses challenges faced by Big Stone Plant in meeting new PM standards due to limitations of PM Continuous Emission Monitoring Systems and the need for PM spiking services.
|
2018 |
2025-EPA-04883 |
0005960
|
1 |
|
EPA's 2018 proposal to tighten filterable particulate matter (fPM) limits disproportionately impacts the Colstrip facility, which would require new emissions control technology to comply with the proposed standard.
|
2018 |
2025-EPA-04883 |
0006110
|
1 |
|
Email correspondence dated September 10, 2025, discusses Ameren's request for a two-year compliance exemption from the MATS rule due to challenges in meeting new PM emissions standards and the associated costs of compliance technology.
|
2014 |
2025-EPA-04883 |
0005799
|
1 |
|
The 2010 report from Minnkota details testing results indicating that brominated powdered activated carbon (PAC) does not effectively reduce mercury emissions to meet the EPA's New Mercury Limitation of 1.2 lb/TBtu at the Young Station.
|
2010 |
2025-EPA-04883 |
0006316
|
1 |
|
EPA's 2004 assessment indicates that no cost-effective technology is available to implement the Lime Rule standards, estimating compliance costs at $2.4 billion over 20 years, with significant concerns raised by the Small Business Administration regarding feasibility.
|
2004 |
2025-EPA-04883 |
0006050
|
1 |
|
Attachment A outlines emission limitations and compliance deadlines for affected sources at coke plants, specifying conditions for new and existing sources under EPA regulations 63.7282 and 63.7283.
|
2001 |
2025-EPA-04883 |
0005771
|
1 |
|
Technical memo detailing annual costs of control options at Colstrip to meet the proposed 0.010 lb/MNIBtu fPMI limit, including capital and annualized costs based on specific assumptions and factors.
|
2001 |
2025-EPA-04883 |
0006116
|
1 |
|
The EPA document discusses the reliability issues of particulate matter continuous emissions monitors at the Big Stone Plant, co-owned by Otter Tail, and outlines the implications of the MATS RTR and potential exemption costs.
|
1975 |
2025-EPA-04883 |
0005957
|
1 |