{"abstract":"The Environmental Protection Agency (EPA) is taking final action to approve a State Implementation Plan (SIP) revision submitted by the Missouri Department of Natural Resources (MoDNR) on September 8, 2021, and supplemented on April 8, 2022, as meeting the Marginal nonattainment area requirements for the 2015 8-hour ozone National Ambient Air Quality Standard (NAAQS or standard) for the Missouri portion of the St. Louis, MO-IL nonattainment area (\"St. Louis area\" or \"area\"). The EPA is taking this action pursuant to the Clean Air Act (CAA or 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/2023/02/07/2023-02310.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"52","title":40}],"citation":"88 FR 7885","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This final rule is effective on March 9, 2023.","disposition_notes":null,"docket_ids":["EPA-R07-OAR-2022-0880","FRL-10388-02-R7"],"dockets":[{"supporting_documents":[{"title":"State Implementation Plan Submission Form","document_id":"EPA-R07-OAR-2022-0880-0006"},{"title":"Redesignation Request for the St Louis Nonattainment Area for the 2015 Ozone Standard","document_id":"EPA-R07-OAR-2022-0880-0005"},{"title":"Marginal Plan for the St Louis Nonattainment Area for the 2015 Ozone Standard","document_id":"EPA-R07-OAR-2022-0880-0004"},{"title":"Maintenance Plan for the St Louis Nonattainment Area for the 2015 Ozone Standard","document_id":"EPA-R07-OAR-2022-0880-0003"},{"title":"EPA Comment Letter on Draft MO Marginal Plan","document_id":"EPA-R07-OAR-2022-0880-0002"}],"agency_name":"EPA","documents":[{"comment_count":0,"comment_start_date":"2023-02-07","updated_at":"2023-02-25T04:38:42.426-05:00","comment_url":"https://www.regulations.gov/commenton/EPA-R07-OAR-2022-0880-0007","allow_late_comments":null,"id":"EPA-R07-OAR-2022-0880-0007","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":5,"id":"EPA-R07-OAR-2022-0880","title":"Air Plan Approval; MO; Marginal Nonattainment Plan for the St. Louis Area for the 2015 8-Hour Ozone Standard"}],"document_number":"2023-02310","effective_on":"2023-03-09","end_page":7886,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2023/02/07/2023-02310.xml","html_url":"https://www.federalregister.gov/documents/2023/02/07/2023-02310/air-plan-approval-mo-marginal-nonattainment-plan-for-the-st-louis-area-for-the-2015-8-hour-ozone","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2023-02310?publication_date=2023-02-07","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2023-02-07/2023-02310/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":144,"last_updated":"2026-10-25 14:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2023-02-07/pdf/2023-02310.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2023-02310.pdf?1675691117","publication_date":"2023-02-07","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2023/02/07/2023-02310.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"State Implementation Plan Submission Form","document_id":"EPA-R07-OAR-2022-0880-0006"},{"title":"Redesignation Request for the St Louis Nonattainment Area for the 2015 Ozone Standard","document_id":"EPA-R07-OAR-2022-0880-0005"},{"title":"Marginal Plan for the St Louis Nonattainment Area for the 2015 Ozone Standard","document_id":"EPA-R07-OAR-2022-0880-0004"},{"title":"Maintenance Plan for the St Louis Nonattainment Area for the 2015 Ozone Standard","document_id":"EPA-R07-OAR-2022-0880-0003"},{"title":"EPA Comment Letter on Draft MO Marginal Plan","document_id":"EPA-R07-OAR-2022-0880-0002"}],"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-R07-OAR-2022-0880","supporting_documents_count":5,"docket_id":"EPA-R07-OAR-2022-0880","document_id":"EPA-R07-OAR-2022-0880-0007","regulation_id_number":null,"title":"Air Plan Approval; MO; Marginal Nonattainment Plan for the St. Louis Area for the 2015 8-Hour Ozone Standard","checked_regulationsdotgov_at":"2023-02-25T09:38:41Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":7885,"subtype":null,"title":"Air Plan Approval; MO; Marginal Nonattainment Plan for the St. Louis Area for the 2015 8-Hour Ozone Standard","toc_doc":"Missouri; Marginal Nonattainment Plan for the St. Louis Area for the 2015 8-Hour Ozone Standard","toc_subject":"Air Quality State Implementation Plans; Approvals and Promulgations","topics":["Air pollution control","Environmental protection","Incorporation by reference","Intergovernmental relations","Ozone","Volatile organic compounds"],"type":"Rule","volume":88}