Approval and Promulgation of Air Quality Implementation Plans; Illinois; Emission Limit Infrastructure SIP Requirements for the 2008 Ozone, 2010 NO2

The Environmental Protection Agency (EPA) is taking final action to approve some elements of state implementation plan (SIP) submissions from Illinois regarding the infrastructure requirements of section 110 of the Clean Air Act (CAA) for the 2008 ozone, 2010 nitrogen dioxide (NO2), and 2010 sulfur dioxide (SO2) 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. In this action, EPA is specifically approving infrastructure requirements concerning emission limits and other control measures. The proposed rulemaking associated with today's final action was published on February 27, 2015, and EPA received no comments during the comment period, which ended on March 30, 2015.