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 finding adequate Kentucky's and Indiana's motor vehicle emission budgets (MVEBs) for volatile organic compounds (VOC) and nitrogen oxides(NOX ) in the submitted maintenance plans for transportation conformity purposes. Approval of the MVEBs is based in part on commitments submitted by the States to use the MOBILE6 mobile emission model within a specific timeframe when it becomes available to update the MVEBs. Finally, EPA is approving source-specific Board Orders to control NOX emissions from 11 sources in Jefferson County, Kentucky. This action finalizes EPA's proposed rulemakings to determine that the Louisville area has attained the 1-hour ozone NAAQS; and to redesignate both the Kentucky and Indiana portions of the Louisville area to attainment for the 1-hour ozone NAAQS, and to approve the 11 source-specific NOX Reasonably Available Control Technology (RACT) Board Orders as revisions to the Kentucky SIP.
↧