{"abstract":"The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision, submitted by the state of Iowa, through the Iowa Department of Natural Resources (IDNR), to the EPA on May 26, 2016, for the purpose of providing for attainment of the 2010 1-hour primary Sulfur Dioxide (SO<INF>2</INF>) National Ambient Air Quality Standard (NAAQS) in the Muscatine County, Iowa nonattainment area (NAA). The EPA concludes that Iowa has appropriately demonstrated that its SIP provides for attainment with the 2010 1-hour primary SO<INF>2</INF> NAAQS in the NAA, and that the plan meets the other applicable requirements under the Clean Air Act (CAA or Act). As a part of approving the attainment demonstration, the EPA is taking final action to approve into the Iowa SIP the SO<INF>2</INF> emissions limits and associated compliance parameters for the NAA. The EPA is also applying a policy regarding startup, shutdown, and malfunction (SSM) exemption provisions in the Iowa SIP that is consistent with the EPA's national policy. In light of this policy and the EPA's evaluation of Iowa's SIP, the EPA is withdrawing the SIP call issued to Iowa as part of the EPA's 2015 SSM SIP Action.","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/2020/11/17/2020-24031.html","cfr_references":[{"chapter":null,"citation_url":null,"part":52,"title":40}],"citation":"85 FR 73218","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This rule will become effective on December 17, 2020.","disposition_notes":null,"docket_ids":["EPA-R07-OAR-2017-0416","FRL-10016-10-Region 7"],"dockets":[],"document_number":"2020-24031","effective_on":"2020-12-17","end_page":73229,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2020/11/17/2020-24031.xml","html_url":"https://www.federalregister.gov/documents/2020/11/17/2020-24031/air-plan-approval-iowa-air-quality-implementation-plan-muscatine-sulfur-dioxide-nonattainment-area","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2020-24031?publication_date=2020-11-17","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2020-11-17/2020-24031/mods.xml","not_received_for_publication":null,"page_length":12,"page_views":{"count":387,"last_updated":"2026-04-04 12:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2020-11-17/pdf/2020-24031.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2020-24031.pdf?1605534314","publication_date":"2020-11-17","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2020/11/17/2020-24031.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Document DB-IA-175 RTC Final Muscatine SO2 1hr Attainment SIP Approval","document_id":"EPA-R07-OAR-2017-0416-0065"},{"title":"Document A-Index of Docket Documents","document_id":"EPA-R07-OAR-2017-0416-0063"},{"title":"Document CL- Iowa 567-28.1","document_id":"EPA-R07-OAR-2017-0416-0058"},{"title":"Document CH- Iowa 567-26.1","document_id":"EPA-R07-OAR-2017-0416-0054"},{"title":"Document CE- Iowa 567-24.1","document_id":"EPA-R07-OAR-2017-0416-0051"},{"title":"Document CC- Final SIP Consistency Issues Guide","document_id":"EPA-R07-OAR-2017-0416-0049"},{"title":"Document CB- SIP Consistency Memo to the File_6-16-20","document_id":"EPA-R07-OAR-2017-0416-0048"},{"title":"Document AH- OAR Concurrence on Region 7 alt policy","document_id":"EPA-R07-OAR-2017-0416-0047"},{"title":"Document Z- IDNR email_FW_ SIP modeling","document_id":"EPA-R07-OAR-2017-0416-0035"},{"title":"Document Y- IDNR_email_5_11_2015","document_id":"EPA-R07-OAR-2017-0416-0034"}],"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-2017-0416","supporting_documents_count":46,"docket_id":"EPA-R07-OAR-2017-0416","document_id":"EPA-R07-OAR-2017-0416-0062","regulation_id_number":null,"title":"Approval of Iowa’s Air Quality Implementation Plan;  Muscatine Sulfur Dioxide Nonattainment Area","checked_regulationsdotgov_at":"2020-11-19T04:30:09Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":73218,"subtype":null,"title":"Air Plan Approval; Iowa; Air Quality Implementation Plan-Muscatine Sulfur Dioxide Nonattainment Area and Start-up, Shutdown, Malfunction SIP Call Withdrawal","toc_doc":"Iowa; Air Quality Implementation PlanMuscatine Sulfur Dioxide Nonattainment Area and Start-up, Shutdown, Malfunction State Implementation Plan Call Withdrawal","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":85}