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

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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. 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. The benefit of this rule is that establishing specific standards in place of a case-by-case analysis improves the clarity, predictability, and timeliness of certain State permit decisions.