Approval and Promulgation of Implementation Plans; Illinois; Volatile Organic Compound Emission Control Measures for Chicago and Metro-East St. Louis Ozone Nonattainment Areas

On July 29, 2010, September 16, 2011, and September 29, 2011, the Illinois Environmental Protection Agency (IEPA) submitted several volatile organic compound (VOC) rules for approval into its State Implementation Plan (SIP). The purpose of these rules is to satisfy the Clean Air Act's (the Act) requirement that States revise their SIPs to include reasonably available control technology (RACT) for sources of VOC emissions in moderate ozone nonattainment areas. Illinois' VOC rules provide RACT requirements for the Chicago and Metro-East St. Louis 8-hour ozone nonattainment areas. These rules are approvable because they are consistent with the Control Technique Guideline (CTG) documents issued by EPA in 2006, 2007, and 2008 and satisfy the RACT requirements of the Act.