Approval and Promulgation of Air Quality Implementation Plans; Indiana; South Bend-Elkhart, Indiana Ozone Maintenance Plan Revision To Approved Motor Vehicle Emissions Budgets

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EPA is proposing to approve Indiana's request to revise the South Bend-Elkhart, Indiana 1997 8-hour ozone maintenance air quality State Implementation Plan (SIP) by replacing the previously approved motor vehicle emissions budgets (budgets) with budgets developed using EPA's Motor Vehicle Emissions Simulator (MOVES) 2010a emissions model. Indiana submitted this request to EPA for parallel processing with a letter dated June 15, 2012, and followed up with a final submittal after the state public comment period ended on July 18, 2012.