Indiana; Ohio; Disapproval of Interstate Transport Requirements for the 2008 Ozone NAAQS

The Environmental Protection Agency (EPA) is disapproving elements of State Implementation Plan (SIP) submissions from Indiana and Ohio regarding the infrastructure requirements of section 110 of the Clean Air Act (CAA) for the 2008 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 is adequate to meet the state's responsibilities under the CAA. This action pertains specifically to infrastructure requirements concerning interstate transport provisions, for which Ohio and Indiana made SIP submissions that, among other things, certified that their existing SIPs were sufficient to meet the interstate transport infrastructure SIP requirements for the 2008 ozone NAAQS.