Approval and Promulgation of Air Quality Implementation Plans; Indiana; VOC Emissions From Fuel Grade Ethanol Production Operations

EPA is approving a March 30, 2007, request from the Indiana Department of Environmental Management (IDEM) to revise the Indiana State Implementation Plan (SIP) by adding a volatile organic compound (VOC) rule for fuel grade ethanol production at dry mills as amendments to 326 IAC 8-5. This rule revision creates an industry-specific Best Available Control Technology (BACT) standard for new fuel grade ethanol production dry mills that replaces the otherwise required case-by-case SIP BACT determination for new facilities with the potential to emit 25 tons or more of VOC per year. Indiana believes that this rule will increase the clarity, predictability and timeliness of its air permits for this particular group of sources. These rules were proposed for approval on September 13, 2007, and comments were received on October 8, 2007.