Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Indiana; Redesignation of Greene County and Jackson County 8-Hour Ozone Nonattainment Areas to Attainment for Ozone

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EPA is proposing to make determinations that the Greene County and Jackson County ozone nonattainment areas have attained the 8-hour ozone National Ambient Air Quality Standard (NAAQS). These proposed determinations are based on three years of complete, quality-assured ambient air quality monitoring data for the 2002-2004 seasons that demonstrate that the 8-hour ozone NAAQS has been attained in the areas. EPA is proposing to approve requests from the State of Indiana to redesignate the Greene County and Jackson County areas to attainment of the 8-hour ozone NAAQS. These requests were submitted by the Indiana Department of Environmental Management (IDEM) on July 15, 2005 and supplemented on September 6, 2005, September 7, 2005, October 6, 2005, and October 20, 2005. In proposing to approve these requests, EPA is also proposing to approve the State's plans for maintaining the 8-hour ozone NAAQS through 2015 in these areas as a revision to the Indiana State Implementation Plan (SIP). EPA is also proposing to find adequate and approve the State's 2015 Motor Vehicle Emission Budgets (MVEBs) for these areas. In the final rules section of this Federal Register, EPA is approving the SIP re