{"abstract":"EPA is proposing to approve revisions to Indiana's state implementation plan as requested by the Indiana Department of Environmental Management (IDEM) to EPA on July 12, 2012, and December 12, 2012. The revisions to Indiana's state implementation plan (SIP) implement certain EPA regulations for particulate matter smaller than 2.5 micrometers (PM<INF>2.5</INF>) by establishing definitions related to PM<INF>2.5</INF>, defining PM<INF>2.5</INF> increment levels, and setting PM<INF>2.5</INF> class 1 variances. The revisions also incorporate definitions and regulations that recognize nitrogen oxides (NO<INF>X</INF>) as an ozone precursor.","action":"Proposed 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/2013/11/01/2013-26267.html","cfr_references":[{"chapter":null,"citation_url":null,"part":52,"title":40}],"citation":"78 FR 65590","comment_url":null,"comments_close_on":"2013-12-02","correction_of":null,"corrections":[],"dates":"Comments must be received on or before December 2, 2013.","disposition_notes":null,"docket_ids":["EPA-R05-OAR-2012-0567","FRL-9902-36-Region 5"],"dockets":[],"document_number":"2013-26267","effective_on":null,"end_page":65592,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2013/11/01/2013-26267.xml","html_url":"https://www.federalregister.gov/documents/2013/11/01/2013-26267/approval-and-promulgation-of-air-quality-implementation-plans-indiana-indiana-pm25-nsr","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2013-26267?publication_date=2013-11-01","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2013-11-01/2013-26267/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":115,"last_updated":"2026-09-20 18:15:07 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2013-11-01/pdf/2013-26267.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2013-26267.pdf?1383232061","publication_date":"2013-11-01","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2013/11/01/2013-26267.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Indiana PM2.5 NSR (Revisions to 326 IAC 2), December 12, 2012 Revised Request","document_id":"EPA-R05-OAR-2012-0567-0004"},{"title":"Indiana PM2.5 NSR (Revisions to 326 IAC 2), July 12, 2012 submittal and Attachments A to C","document_id":"EPA-R05-OAR-2012-0567-0002"}],"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-R05-OAR-2012-0567","supporting_documents_count":2,"docket_id":"EPA-R05-OAR-2012-0567","regulation_id_number":null,"title":"Indiana PM2.5 NSR (Revisions to 326 IAC 2)","checked_regulationsdotgov_at":"2013-12-04T05:00:18Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":65590,"subtype":null,"title":"Approval and Promulgation of Air Quality Implementation Plans; Indiana; Indiana PM2.5 NSR","toc_doc":"Indiana; Indiana PM2.5 NSR","toc_subject":"Air Quality State Implementation Plans; Approvals and Promulgations:","topics":["Air pollution control","Environmental protection","Incorporation by reference","Intergovernmental relations","Nitrogen dioxide","Ozone","Particulate matter","Reporting and recordkeeping requirements","Sulfur oxides","Volatile organic compounds"],"type":"Proposed Rule","volume":78}