{"abstract":"Pursuant to the Federal Clean Air Act (CAA, the Act), the Environmental Protection Agency (EPA) is disapproving a revision to the Texas State Implementation Plan (SIP) submitted by the State of Texas through the Texas Commission on Environmental Quality (TCEQ) on August 20, 2020 (2020 SIP revision). The 2020 SIP revision addresses emissions during planned Maintenance, Startup and Shutdown (MSS) activities for certain Electric Generating Units (EGUs) and includes requirements intended to address visible emissions (opacity) and Particulate Matter (PM) emissions during planned MSS activities. The requirements are included in eight Agreed Orders (AOs) issued by TCEQ to the affected EGUs and provided in the 2020 SIP revision. EPA determined that the requirements contained in these AOs do not meet the CAA enforceability requirements or the CAA requirement that emission limitations must apply on a continuous basis. We are taking this action in accordance with section 110 of the Act.","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/2024/12/20/2024-29956.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"52","title":40}],"citation":"89 FR 104043","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This rule is effective on January 21, 2025.","disposition_notes":null,"docket_ids":["EPA-R06-OAR-2021-0029","FRL-12218-02-R6"],"dockets":[{"supporting_documents":[{"title":"TX249.111 Sierra Club modeling files available upon request","document_id":"EPA-R06-OAR-2021-0029-0111"},{"title":"TX249x110-00 EPA Request to Sierra Club for Modeling Files 10-4-24","document_id":"EPA-R06-OAR-2021-0029-0110"},{"title":"TX249.109 Guide to Powder River Basin (PRB) Coal Mines, 2018","document_id":"EPA-R06-OAR-2021-0029-0109"},{"title":"TX249.108 Lignite Resources in Texas, Bureau of Economic Geology, The University of Texas at Austin","document_id":"EPA-R06-OAR-2021-0029-0108"},{"title":"TX249.107 Actual Limestone Stack Emissions v0.1-r6e.xlsx","document_id":"EPA-R06-OAR-2021-0029-0107"},{"title":"TX249.106 U.S. Energy Information Administration, Annual Electric Power Industry Report, Form EIA-860 detailed data with previous form data (EIA-860A/860B), September 23, 2024, Final 2023 data","document_id":"EPA-R06-OAR-2021-0029-0106"},{"title":"TX249.104 EPA Air Quality System (AQS) Design Values (DVs) for East Texas, October 2024","document_id":"EPA-R06-OAR-2021-0029-0104"},{"title":"TX249.103 NRG Texas Supplemental SO2 Modeling Analysis for W.A. Parish and Limestone Power Plants, January 25, 2016","document_id":"EPA-R06-OAR-2021-0029-0103"},{"title":"TX249.102-00 Wingra Engineering, S.C., Limestone Electric Generating Station Evaluation of Compliance with the 1-hour NAAQS for SO2, 2015","document_id":"EPA-R06-OAR-2021-0029-0102"},{"title":"TX249.99-00 Texas Rusk-Panola Attainment Demonstration State Implementation Plan for the 2010 Sulfur Dioxide National Ambient Air Quality Standard, and Appendices K, L, and N, adopted February 9, 2022","document_id":"EPA-R06-OAR-2021-0029-0099"}],"agency_name":"EPA","documents":[{"comment_count":0,"comment_start_date":"2024-12-20","updated_at":"2024-12-20T12:56:49.568-05:00","comment_url":"https://www.regulations.gov/commenton/EPA-R06-OAR-2021-0029-0093","allow_late_comments":false,"id":"EPA-R06-OAR-2021-0029-0093","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":32,"id":"EPA-R06-OAR-2021-0029","title":"TX249 Texas Agreed Orders Regarding Planned Maintenance, Startup And Shutdown Emissions For Certain Electric Generating Units, submitted to EPA August 20, 2020 (TX-453, SIP)"}],"document_number":"2024-29956","effective_on":"2025-01-21","end_page":104059,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2024/12/20/2024-29956.xml","html_url":"https://www.federalregister.gov/documents/2024/12/20/2024-29956/air-plan-disapproval-texas-control-of-air-pollution-from-visible-emissions-and-particulate-matter","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2024-29956?publication_date=2024-12-20","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2024-12-20/2024-29956/mods.xml","not_received_for_publication":null,"page_length":17,"page_views":{"count":444,"last_updated":"2026-07-28 16:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2024-12-20/pdf/2024-29956.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2024-29956.pdf?1734615913","publication_date":"2024-12-20","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2024/12/20/2024-29956.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"TX249.111 Sierra Club modeling files available upon request","document_id":"EPA-R06-OAR-2021-0029-0111"},{"title":"TX249x110-00 EPA Request to Sierra Club for Modeling Files 10-4-24","document_id":"EPA-R06-OAR-2021-0029-0110"},{"title":"TX249.109 Guide to Powder River Basin (PRB) Coal Mines, 2018","document_id":"EPA-R06-OAR-2021-0029-0109"},{"title":"TX249.108 Lignite Resources in Texas, Bureau of Economic Geology, The University of Texas at Austin","document_id":"EPA-R06-OAR-2021-0029-0108"},{"title":"TX249.107 Actual Limestone Stack Emissions v0.1-r6e.xlsx","document_id":"EPA-R06-OAR-2021-0029-0107"},{"title":"TX249.106 U.S. Energy Information Administration, Annual Electric Power Industry Report, Form EIA-860 detailed data with previous form data (EIA-860A/860B), September 23, 2024, Final 2023 data","document_id":"EPA-R06-OAR-2021-0029-0106"},{"title":"TX249.104 EPA Air Quality System (AQS) Design Values (DVs) for East Texas, October 2024","document_id":"EPA-R06-OAR-2021-0029-0104"},{"title":"TX249.103 NRG Texas Supplemental SO2 Modeling Analysis for W.A. Parish and Limestone Power Plants, January 25, 2016","document_id":"EPA-R06-OAR-2021-0029-0103"},{"title":"TX249.102-00 Wingra Engineering, S.C., Limestone Electric Generating Station Evaluation of Compliance with the 1-hour NAAQS for SO2, 2015","document_id":"EPA-R06-OAR-2021-0029-0102"},{"title":"TX249.99-00 Texas Rusk-Panola Attainment Demonstration State Implementation Plan for the 2010 Sulfur Dioxide National Ambient Air Quality Standard, and Appendices K, L, and N, adopted February 9, 2022","document_id":"EPA-R06-OAR-2021-0029-0099"}],"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-R06-OAR-2021-0029","supporting_documents_count":32,"docket_id":"EPA-R06-OAR-2021-0029","document_id":"EPA-R06-OAR-2021-0029-0093","regulation_id_number":null,"title":"TX249 Texas Agreed Orders Regarding Planned Maintenance, Startup And Shutdown Emissions For Certain Electric Generating Units, submitted to EPA August 20, 2020 (TX-453, SIP)","checked_regulationsdotgov_at":"2024-12-21T16:00:06Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":104043,"subtype":null,"title":"Air Plan Disapproval; Texas; Control of Air Pollution From Visible Emissions and Particulate Matter","toc_doc":"Texas; Control of Air Pollution from Visible Emissions and Particulate Matter","toc_subject":"Air Quality State Implementation Plans; Approvals and Promulgations","topics":["Air pollution control","Carbon monoxide","Environmental protection","Hydrocarbons","Incorporation by reference","Intergovernmental relations","Lead","Nitrogen dioxide","Particulate matter","Reporting and recordkeeping requirements","Volatile organic compounds"],"type":"Rule","volume":89}