The Changing NESHAP Landscape – Clean Air Act Compliance for Hazardous Air Pollutants

July 28, 2025

Alert for industry to changes in regulations it must comply with.

 

Recently, Donald Trump issued four executive orders extending Clean Air Act – NESHAP compliance deadlines for a number of specific facilities that provide medical equipment sterilization, burn coal to make electricity, manufacture certain synthetic chemicals, or mine taconite. The big headline is the EPA announcing plans to rescind the ‘endangerment finding’ that allows climate regulation. However, at the same time coal combustion residuals rules are being changed. This Regulatory Alert contains language from the four executive orders, which includes a list of the specific facilities that have been granted extensions to comply. In each order, the President finds that the technology required is not available and that it is in the interest of national security to provide the extensions.

Normally there is a notice-and-comment rulemaking under the Administrative Procedures Act to extend deadlines. If the courts allow the President to continue invoking national security we may see more such executive orders modifying regulations. Follow SCS Engineers on social media to read our SCS Technical Bulletins, which summarize regulatory proposals and changes for public and private entities.

As the regulatory landscape continues to evolve, proactive planning is critical to preserving flexibility, value, and mitigating risk. We encourage businesses to consult with environmental engineers and consultants and their legal counsel to navigate these changes for continued sustainable success.

 

NESHAP – EtO Rule

On April 5, 2024, the Environmental Protection Agency published a final rule, pursuant to section 112 of the Clean Air Act, 42 U.S.C. 7412, titled National Emission Standards for Hazardous Air Pollutants:  Ethylene Oxide Emissions Standards for Sterilization Facilities Residual Risk and Technology Review, 89 FR 24090 (EtO Rule).  The EtO Rule imposes new emissions-control requirements on commercial sterilization facilities.

Certain stationary sources subject to the EtO Rule, as identified in Annex I of this proclamation, are exempt from compliance with the EtO Rule for a period of 2 years beyond the EtO Rule’s relevant compliance dates (Exemption).  This Exemption applies to all compliance deadlines established under the EtO Rule applicable to the stationary sources listed in Annex I, with each such deadline extended by 2 years from the date originally required for such deadline.  The effect of this Exemption is that, during each such 2-year period, these stationary sources will remain subject to the emissions and compliance obligations in effect prior to the issuance of the EtO Rule.  In support of this Exemption, I (Trump) hereby make the following determinations:

The technology to implement the EtO Rule is not available.  Such technology does not exist in a commercially viable form sufficient to allow implementation of and compliance with the EtO Rule by the compliance dates set forth in the EtO Rule. It is in the national security interests of the United States to issue this Exemption for the reasons stated in paragraphs 1 and 3 of this proclamation. Link

ANNEX I

International Sterilization Laboratory
Affected Facility/Source: Groveland Facility, Florida

Becton Dickinson and Company

Affected Facility/Source:

      1. BD Covington, Georgia
      2. BD Madison, Georgia
      3. BD Medical, Utah
      4. BD Medical Pharmaceutical Systems, Nebraska
      5. Edwards Lifesciences Technology Sàrl, Puerto Rico

KPR US, LLC d/b/a Kendall Patient Recovery
Affected Facility/Source: Augusta Facility, Georgia

MedXL, LLC

Affected Facility/Source: Ardmore Facility, Oklahoma

Aligned Medical Solutions

Affected Facility/Source:

      1. 1602 4th Ave. Facility, Billings, Montana
      2. 1400 Montana Ave. Facility, Billings, Montana

Professional Contract Sterilization, Inc.

Affected Facility/Source: Taunton Facility, Massachusetts

Sterigenics U.S., LLC

Affected Facility/Source:

      1. Atlanta Facility, Georgia
      2. Charlotte Facility, North Carolina
      3. Grand Prairie Facility, Texas
      4. 4900 S Gifford Ave. Facility, Los Angeles, California
      5. 4801-63 E 50th St. Facility, Los Angeles, California
      6. Ontario Facility, California
      7. Queensbury Facility, New York
      8. Salt Lake City Facility, Utah
      9. Santa Teresa Facility, New Mexico

Cosmed Group, Inc.

Affected Facility/Source:

      1. Erie Facility, Pennsylvania
      2. Franklin Facility, New Jersey
      3. Linden Facility, New Jersey

Arthrex

Affected Facility/Source: Ave Maria Facilities (2), Florida

Cook Incorporated

Affected Facility/Source: Ellettsville North Facility, Indiana

ALCON Research Ltd.

Affected Facility/Source: ALCON Advance Optic Device Center, North Facility, West Virginia

  1. Braun U.S. Device Manufacturing LLC

Affected Facility/Source: Allentown Manufacturing Facility, Pennsylvania

DeRoyal Industries, Inc.

Affected Facility/Source:

      1. 1135 Highway 33 South, New Tazewell, Tennessee
      2. 1211 Highway 33 South, New Tazewell, Tennessee

Sterilization Services of Georgia, Inc.

Affected Facility/Source: Atlanta Facility, Georgia

Sterilization Services of Virginia, Inc.

Affected Facility/Source: Richmond Facility, Virginia

Trinity Sterile, Inc.

Affected Facility/Source: Trinity Sterile, Inc., Maryland

LivaNova USA, Inc.

Affected Facility/Source: LivaNova Arvada Facility, Colorado

Covidien LP

Affected Facility/Source: Covidien North Haven Facility, Connecticut

Medtronic Xomed LLC

Affected Facility/Source: Jacksonville Facility, Florida

Medtronic Puerto Rico Operations Company, Inc.

Affected Facility/Source:

      1. Villalba Facility, Puerto Rico
      2. Juncos Facility, Puerto Rico

Advanced Product Solutions

Affected Facility/Source: Columbia Facility, Alabama

Affected Facility/Source: Salinas, Puerto Rico

Steri-Tech, Inc.

 

NESHAP – MATS Rule

On May 7, 2024, the Environmental Protection Agency published a final rule, pursuant to section 112 of the Clean Air Act, 42 U.S.C. 7412, titled National Emissions Standards for Hazardous Air Pollutants:  Coal- and Oil-Fired Electric Utility Steam Generating Units Review of the Residual Risk and Technology Review, 89 FR 38508 (Rule), which amended the preexisting Mercury and Air Toxics Standards (MATS) rule to make it more stringent.  The Rule’s effective date was July 8, 2024.  Id.  Its compliance date is July 8, 2027, 3 years after its effective date.  See 89 FR 38519.

Certain stationary sources subject to the Rule, as identified in Annex I of this proclamation, are exempt from compliance with the Rule for a period of 2 years beyond the Rule’s compliance date — i.e., for the period beginning July 8, 2027, and concluding July 8, 2029 (Exemption). The effect of this Exemption is that, during this 2-year period, these stationary sources are subject to the compliance obligations that they are currently subject to under the MATS as the MATS existed prior to the Rule.  In support of this Exemption, I (Trump) hereby make the following determinations:

a.  The technology to implement the Rule is not available.  Such technology does not exist in a commercially viable form sufficient to allow implementation of and compliance with the Rule by its compliance date of July 8, 2027.

b.  It is in the national security interests of the United States to issue this Exemption for the reasons stated in paragraphs 1 and 3 of this proclamation. Link

ANNEX I

Affected Facility/Source: Cardinal Unit 1, Unit 2, and Unit 3, Ohio

Tri-State Generation and Transmission Association

Affected Facility/Source: Craig Generating Station Unit 2 and Unit 3, Colorado

City Water, Light and Power

Affected Facility/Source: Dallman Unit 4, Illinois

Cardinal Operating Company

 

NESHAP – HON Rule

On May 16, 2024, the Environmental Protection Agency published a final rule titled New Source Performance Standards for the Synthetic Organic Chemical Manufacturing Industry and National Emission Standards for Hazardous Air Pollutants for the Synthetic Organic Chemical Manufacturing Industry and Group I & II Polymers and Resins Industry, 89 FR 42932 (HON Rule). The HON Rule imposes new emissions-control requirements on certain chemical manufacturing facilities, some of which were promulgated pursuant to section 112 of the Clean Air Act, 42 U.S.C. 7412.

Certain stationary sources subject to the HON Rule, as identified in Annex I of this proclamation, are exempt from compliance with those aspects of the HON Rule that were promulgated under section 112 of the Clean Air Act, 42 U.S.C. 7412 for a period of 2 years beyond the HON Rule’s relevant compliance dates (Exemption). This Exemption applies to all compliance deadlines established under the HON Rule applicable to the stationary sources listed in Annex I, with each such deadline extended by 2 years from the date originally required for such deadline. The effect of this Exemption is that, during each such 2-year period, these stationary sources will be subject to the emissions and compliance obligations that they are currently subject to under the applicable standard as that standard existed prior to the HON Rule. In support of this Exemption, I (Trump) hereby make the following determinations:

a.  The technology to implement the HON Rule is not available. Such technology does not exist in a commercially viable form sufficient to allow implementation of and compliance with the HON Rule by the compliance dates in the HON Rule.

b.  It is in the national security interests of the United States to issue this Exemption for the reasons stated in paragraphs 1 and 3 of this proclamation. Link

ANNEX I

  1. Shell Chemical LP
    i. Affected Facility/Source: Geismar Plant, Louisiana
  2. SABIC Innovative Plastics Mt. Vernon, LLC
    i. Affected Facility/Source: Manufacturing Plant, Indiana
  3. Bakelite Synthetics
    i. Affected Facility/Source:
    a. Riegelwood, North Carolina;
    b. Conway, North Carolina;
    c. Crossett, Arkansas;
    d. Louisville, Kentucky;
    e. Lufkin, Texas;
    f. Taylorsville, Mississippi
  4. The Dow Chemical Company
    i. Affected Facility/Source: Glycol II Plant, Louisiana
  5. Trinseo LLC
    i. Affected Facility/Source:
    a. Trinseo Facility, Georgia
    b. Trinseo Facility, Michigan
  6. Formosa Plastics Corporation, U.S.A.
    i. Affected Facility/Source:
    a. Formosa Plastics Corporation, Louisiana
    b. Formosa Plastics Corporation, Texas
  7. Union Carbide Corporation/The Dow Chemical Company
    i. Affected Facility/Source:
    a. Seadrift Operations, Texas
    b. Hahnville, St. Charles Parish Facility, Louisiana
  8. Westlake Vinyl’s LLC/Westlake Corporation
    i. Affected Facility/Source:
    a. Petrochemical Complex, Louisiana
    b. Styrene Monomer Production Facility, Louisiana
    c. Styrene Marine Terminal, Louisiana
    d. Lake Charles South Facility, Louisiana
    e. Lake Charles North Facility, Louisiana
  9. BASF TotalEnergies Petrochemicals LLC
    i. Affected Facility/Source: Port Arthur Facility, Texas
  10. BASF Corporation
    i. Affected Facility/Source:
    a. Geismar Facility, Louisiana;
    b. North Geismar Facility, Louisiana;
    c. Freeport Facility, Texas
  11. Rubicon LLC
    i. Affected Facility/Source: Geismar Facility, Louisiana
  12. CITGO Petroleum Corporation
    i. Affected Facility/Source:
    a. Lake Charles Refinery, Louisiana
    b. Corpus Christi Refinery, Texas
    c. Lemont Refinery, Illinois
  13. INEOS Americas LLC
    i. Affected Facility/Source: Bayport EO Plant, Texas
  14. Celanese Corporation
    i. Affected Facility/Source:
    a. Narrows Facility, Virginia
    b. Clear Lake Facility, Texas
    c. Bishop Facility, Texas
    d. Bay City Facility, Texas
  15. Huntsman Petrochemical LLC
    i. Affected Facility/Source:
    a. Huntsman Pensacola, Florida
    b. Huntsman Conroe, Texas
  16. TotalEnergies Petrochemicals & Refining USA, Inc.
    i. Affected Facility/Source:
    a. TotalEnergies Petrochemicals & Refining USA, Inc., Alabama
    b. Cos-Mar StyreneMonomer Plant, Alabama
    c. TotalEnergies Polystrene Plant, Louisiana
    d. Port Arthur Refinery, Texas
  17. Indorama Ventures Xylenes and PTA
    i. Affected Facility/Source: Decatur Facility, Alabama
  18. Denka Performance Elastomer LLC
    i. Affected Facility/Source: LaPlace Neoprene Production Facility, Louisiana
  19. Sasol Chemicals (USA) LLC
    i. Affected Facility/Source: Lake Charles Chemical Complex, Louisiana
  20. Philips 66 Company
    i. Affected Facility/Source:
    a. Sweeny Refinery, Texas
    b. WRB Refining LP Calvert Refinery, Illinois
    c. WRB Refining LP Borger Refinery, Texas
  21. Indorama Ventures Oxides, LLC
    i. Affected Facility/Source: Port Neches Facility, Texas
  22. Eastman Chemical Company
    i. Affected Facility/Source: Longview Facility, Texas
  23. DuPont Specialty Products USA, LLC
    i. Affected Facility/Source: Pontchartrain Site, Louisiana
  24. Stepan Company
    i. Affected Facility/Source: Millsdale Facility, Illinois
  25. Ascend Performance Materials Operations LLC
    i. Affected Facility/Source:
    a. Ascend Decatur, Alabama;
    b. Ascend Alvin, Texas;
    c. Ascend Pensacola, Florida

 

NESHAP – Taconite Rule

On March 6, 2024, the Environmental Protection Agency published a final rule, pursuant to section 112 of the Clean Air Act, 42 U.S.C. 7412, titled National Emission Standards for Hazardous Air Pollutants: Taconite Iron Ore Processing, 89 FR 16408 (Taconite Rule).  The Taconite Rule imposes new emissions-control requirements on taconite iron ore processing facilities.

Certain stationary sources subject to the Taconite Rule, as identified in Annex I of this proclamation, are exempt from compliance with the Taconite Rule for a period of 2 years beyond the Taconite Rule’s relevant compliance dates (Exemption).The technology to implement the Taconite Rule is not currently available, and it is necessary to issue this Exemption now because long design, permitting, and construction lead times mean that regulated entities will not be able to meet the relevant compliance deadlines absent compliance relief. This Exemption applies to all compliance deadlines established under the Taconite Rule, with each such deadline extended by 2 years from the date originally required for such deadline. The effect of this Exemption is that, during each such 2-year period, these stationary sources are subject to the emissions and compliance obligations that they are currently subject to under the applicable standard as that standard existed prior to the Taconite Rule. In support of this Exemption, I (Trump) hereby make the following determinations:

a.  The technology to implement the Taconite Rule is not available.  Such technology does not exist in a commercially viable form sufficient to allow implementation of and compliance with the Taconite Rule by the compliance dates in the Taconite Rule.

b.  It is in the national security interests of the United States to issue this Exemption for the reasons stated in paragraphs 1 and 3 of this proclamation. Link

ANNEX I

  1.  United States Steel Corporation
    i.    Affected Facility/Source:
    i.    Keetac Plant, Keewatin, Minnesota
    ii.   Minntac Plant, Mountain Iron, Minnesota2.    Cleveland-Cliffs Inc.
    i.    Affected Facility/Source:
    i.    United Taconite, Minnesota
    ii.   Northshore Mining, Minnesota
    iii.  Hibbing Taconite, Minnesota
    iv.   Minorca Mine, Minnesota
    v.    Tilden Mine, Michigan
    vi.   Empire Mine, Michigan

 

 

Posted by Diane Samuels at 6:00 am
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