Determination of Attainment, Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Indiana; Redesignation of the Evansville Area to Attainment of the 8-Hour Ozone Standard

概要

On June 2, 2005, the State of Indiana, through the Indiana Department of Environmental Management (IDEM), submitted: A request for the EPA to redesignate the area of Evansville (Vanderburgh and Warrick Counties) from nonattainment to attainment of the 8-hour ozone National Ambient Air Quality Standard (NAAQS); and a request for EPA approval of an Indiana State Implementation Plan (SIP) revision containing a 10- year maintenance plan for the Evansville area. EPA is proposing to approve the State's request to redesignate the Evansville area to attainment of the 8-hour ozone NAAQS. EPA's proposed approval of the redesignation request is based on the determination that the Evansville area and the State of Indiana have met the criteria for redesignation to attainment specified in the Clean Air Act (CAA), including the determination that the Evansville area has attained the 8-hour ozone standard. In conjunction with the proposed approval of the redesignation request for the Evansville area, EPA is proposing to approve the State's plan to maintain the attainment of the 8-hour ozone NAAQS through 2015 in this area as a revision to the Indiana SIP. EPA is also proposing to approve 2015 Vola