{"abstract":"The Environmental Protection Agency (EPA) is partially approving and partially disapproving a revision to the Michigan State Implementation Plan (SIP) for attaining the 2010 1-hour primary sulfur dioxide (SO2) national ambient air quality standard (NAAQS or ``standard'') for the Detroit SO2 nonattainment area (NAA). This SIP revision (hereinafter called the ``Detroit SO2 plan'' or ``plan'') includes Michigan's attainment demonstration and other elements required under the Clean Air Act (CAA). EPA is approving the base year emissions inventory and affirming that the nonattainment new source review (NNSR) requirements for the area have been met. EPA is disapproving the attainment demonstration, as well as the requirements for meeting reasonable further progress (RFP) toward attainment of the NAAQS, reasonably available control measures and reasonably available control technology (RACM/RACT), and contingency measures. Finally, EPA is disapproving the plan's control measures for two facilities as not demonstrating attainment and is approving the enforceable control measures for two facilities as SIP strengthening.","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/2021/03/19/2021-05508.html","cfr_references":[{"chapter":null,"citation_url":null,"part":52,"title":40}],"citation":"86 FR 14827","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This final rule is effective on April 19, 2021.","disposition_notes":null,"docket_ids":["EPA-R05-OAR-2016-0321","FRL-10021-50-Region 5"],"dockets":[],"document_number":"2021-05508","effective_on":"2021-04-19","end_page":14832,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2021/03/19/2021-05508.xml","html_url":"https://www.federalregister.gov/documents/2021/03/19/2021-05508/air-plan-approval-michigan-partial-approval-and-partial-disapproval-of-the-detroit-so2-nonattainment","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2021-05508?publication_date=2021-03-19","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2021-03-19/2021-05508/mods.xml","not_received_for_publication":null,"page_length":6,"page_views":{"count":341,"last_updated":"2024-03-28 10:15:10 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2021-03-19/pdf/2021-05508.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2021-05508.pdf?1616071518","publication_date":"2021-03-19","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2021/03/19/2021-05508.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Michigan Michigan 2010 SO2 Attainment Demonstration for Wayne County; Sierra Club/Earthjustice; 09/21/2016 pre-proposal comments","document_id":"EPA-R05-OAR-2016-0321-0004"},{"title":"Michigan 2010 SO2 NAAQS SIP for Wayne County, 06/30/2016 Addendum","document_id":"EPA-R05-OAR-2016-0321-0003"},{"title":"Michigan 2010 SO2 Attainment Demonstration for Wayne County, 05/31/2016 submittal","document_id":"EPA-R05-OAR-2016-0321-0002"}],"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-R05-OAR-2016-0321","supporting_documents_count":3,"docket_id":"EPA-R05-OAR-2016-0321","document_id":"EPA-R05-OAR-2016-0321-0037","regulation_id_number":null,"title":"Michigan 2010 SO2 Attainment Demonstration for Wayne County\n\n","checked_regulationsdotgov_at":"2021-03-20T03:30:09Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":14827,"subtype":null,"title":"Air Plan Approval; Michigan; Partial Approval and Partial Disapproval of the Detroit SO2 Nonattainment Area Plan","toc_doc":"Michigan; Partial Approval and Partial Disapproval of the Detroit Sulfur Dioxide Nonattainment Area Plan","toc_subject":"Air Quality State Implementation Plans; Approvals and Promulgations:\n","topics":["Air pollution control","Environmental protection","Incorporation by reference","Intergovernmental relations","Reporting and recordkeeping requirements","Sulfur oxides"],"type":"Rule","volume":86}