Approval and Promulgation of Implementation Plans and Redesignation of Areas for Air Quality Planning Purposes; Kentucky and Indiana; Approval of Revisions to State Implementation Plan; Kentucky

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EPA is determining that the Louisville moderate 1-hour ozone nonattainment area (Louisville area) has attained the 1-hour ozone National Ambient Air Quality Standard (NAAQS). The Louisville area includes Jefferson County, and portions of Bullitt and Oldham Counties, Kentucky; and Clark and Floyd Counties, Indiana. This determination is based on three years of complete, quality-assured, ambient air monitoring data for the 1998 to 2000 ozone seasons. On the basis of this determination, EPA is also determining that the State Implementation Plan (SIP) submissions for certain reasonable further progress (RFP) and attainment demonstration requirements, along with certain other related requirements of part D of title I of the Clean Air Act (CAA), are not applicable to the area. EPA is also approving Kentucky's and Indiana's requests submitted March 30, 2001, and April 11, 2001, respectively, as subsequently supplemented, to redesignate the Louisville area to attainment for the 1-hour ozone NAAQS. In approving these requests, EPA is approving the plans for maintaining the 1-hour ozone NAAQS through 2012, as revisions to the Kentucky and Indiana (States) SIPs. EPA is also approving and find