{"abstract":"The U.S. Environmental Protection Agency (EPA) is finalizing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Polyether Polyols (PEPO) Production under the Clean Air Act (CAA). Specifically, for this NESHAP, the EPA is finalizing the removal of affirmative defense provisions associated with the violation of air emission standards due to malfunctions.","action":"Final rule.","agencies":[{"raw_name":"ENVIRONMENTAL PROTECTION AGENCY","name":"Environmental Protection Agency","id":145,"url":"https://www.federalregister.gov/agencies/environmental-protection-agency","json_url":"https://www.federalregister.gov/api/v1/agencies/145","parent_id":null,"slug":"environmental-protection-agency"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2025/09/02/2025-16744.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"63","title":40}],"citation":"90 FR 42323","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This final rule is effective on September 2, 2025.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2023-0509","FRL-11651-04-OAR"],"dockets":[{"supporting_documents":[{"title":"Proposed edits to Regulatory Text for removal of Affirmative Defense provisions","document_id":"EPA-HQ-OAR-2023-0509-0004"},{"title":"EPA letter granting Sierra Club petition 2014","document_id":"EPA-HQ-OAR-2023-0509-0003"},{"title":"Petition to remove Affirmative Defense Sierra Club 2014","document_id":"EPA-HQ-OAR-2023-0509-0002"}],"agency_name":"EPA","documents":[{"comment_count":null,"comment_start_date":null,"updated_at":"2025-09-02T09:55:55.450-04:00","comment_url":"https://www.regulations.gov/commenton/EPA-HQ-OAR-2023-0509-0011","allow_late_comments":false,"id":"EPA-HQ-OAR-2023-0509-0011","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":3,"id":"EPA-HQ-OAR-2023-0509","title":"Removal of Affirmative Defense Provisions from Specified New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants"}],"document_number":"2025-16744","effective_on":"2025-09-02","end_page":42328,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2025/09/02/2025-16744.xml","html_url":"https://www.federalregister.gov/documents/2025/09/02/2025-16744/national-emission-standards-for-hazardous-air-pollutants-for-the-polyether-polyols-production","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2025-16744?publication_date=2025-09-02","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2025-09-02/2025-16744/mods.xml","not_received_for_publication":null,"page_length":6,"page_views":{"count":563,"last_updated":"2026-07-27 10:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2025-09-02/pdf/2025-16744.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2025-16744.pdf?1756471522","publication_date":"2025-09-02","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2025/09/02/2025-16744.txt","regulation_id_number_info":{"2060-AW56":{"issue":"202504","html_url":"https://www.federalregister.gov/regulations/2060-AW56/national-emission-standards-for-hazardous-air-pollutants-for-the-polyether-polyols-production-indust","title":"National Emission Standards for Hazardous Air Pollutants for the Polyether Polyols Production Industry: Removal of Affirmative Defense","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202504&RIN=2060-AW56&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["2060-AW56"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Proposed edits to Regulatory Text for removal of Affirmative Defense provisions","document_id":"EPA-HQ-OAR-2023-0509-0004"},{"title":"EPA letter granting Sierra Club petition 2014","document_id":"EPA-HQ-OAR-2023-0509-0003"},{"title":"Petition to remove Affirmative Defense Sierra Club 2014","document_id":"EPA-HQ-OAR-2023-0509-0002"}],"comments_count":0,"agency_id":"EPA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-HQ-OAR-2023-0509","supporting_documents_count":3,"docket_id":"EPA-HQ-OAR-2023-0509","document_id":"EPA-HQ-OAR-2023-0509-0011","regulation_id_number":null,"title":"Removal of Affirmative Defense Provisions from Specified New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants","checked_regulationsdotgov_at":"2025-09-03T16:55:04Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":42323,"subtype":null,"title":"National Emission Standards for Hazardous Air Pollutants for the Polyether Polyols Production Industry: Removal of Affirmative Defense","toc_doc":"Polyether Polyols Production Industry: Removal of Affirmative Defense","toc_subject":"National Emission Standards for Hazardous Air Pollutants","topics":["Administrative practice and procedure","Air pollution control","Environmental protection","Hazardous substances","Intergovernmental relations","Reporting and recordkeeping requirements"],"type":"Rule","volume":90}