Air Plan Approval; Indiana; Infrastructure SIP Requirements for the 2015 Ozone NAAQS and References to the Code of Federal Regulations
The Environmental Protection Agency (EPA) is approving elements of a State Implementation Plan (SIP) submission from Indiana regarding the infrastructure requirements of section 110 of the Clean Air Act (CAA) for the 2015 ozone National Ambient Air Quality Standards (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. EPA is also approving revisions to the Indiana SIP that would incorporate by reference a more recent edition of the Code of Federal Regulations (CFR). EPA proposed this action on June 29, 2022, and received no comments.