Approval and Promulgation of Air Quality Implementation Plans; Indiana; Redesignation of the Evansville Area to Attainment of the Fine Particulate Matter Standard

概要

On April 3, 2008, the Indiana Department of Environmental Management (IDEM) submitted a request for EPA to approve the redesignation of the Evansville, Indiana nonattainment area to attainment of the 1997 annual fine particulate matter (PM 2.5 ) standard. This request also included emissions information and related material to address related State Implementation Plan (SIP) requirements. On May 23, 2011, EPA proposed to approve the SIP submittals and to act as requested to redesignate the Evansville PM 2.5 nonattainment area to attainment. The submittals included emissions inventories, a maintenance plan for the Evansville area for the 1997 annual PM 2.5 standard and accompanying motor vehicle emissions budgets. EPA received one set of adverse comments and one set of supportive comments. After review and consideration of these comments and of the emission reduction mandates of the final Cross-State Air Pollution Rule promulgated recently, EPA is taking final action to approve the requested SIP revisions and to redesignate the Evansville PM 2.5 nonattainment area to attainment for the annual 1997 PM 2.5 standard.