Air Plan Approval; Illinois; Infrastructure SIP Requirements for the 2012 PM2.5 and 2015 Ozone NAAQS

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Environmental Protection Agency 40 CFR Part 52 [EPA-R05-OAR-2017-0583; EPA-R05-OAR-2019-0311; EPA-R05-OAR-2020-0501; FRL-9056-01-R5] AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: The Environmental Protection Agency (EPA) is proposing to approve elements of a State Implementation Plan (SIP) revision submitted by the State of Illinois regarding the infrastructure requirements of section 110 of the Clean Air Act (CAA) for the 2012 annual fine particulate matter (PM 2.5 ) and 2015 ozone National Ambient Air Quality Standards (NAAQS). Additionally, EPA is proposing to approve the infrastructure requirements related to Prevention of Significant Deterioration (PSD) for previous NAAQS. The infrastructure requirements are designed to ensure that the structural components of each state's air quality management program are adequate to meet the state's responsibilities under the CAA. DATES: Comments must be received on or before October 29, 2021. ( printed page 53916) ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R05-OAR-2017-0583 (for PM 2.5 ), EPA-R05-OAR-2019-0311 (for ozone), or EPA-R05-OAR-2020-0501 (for PSD) at https://www.regulations.gov or via email to arra.sarah@epa.gov . For comments submitted at Regulations.gov , follow the online instructions for submitting comments. Once submitted, comments cannot be edited or removed from Regulations.gov . For either manner of submission, EPA may publish any comment received to its public …