Adequacy Status of the Kentucky Portion of the Huntington-Ashland Tri-State Area 1997 Annual PM2.5 Attainment Demonstration Insignificance Finding for Transportation Conformity Purposes

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In this notice, EPA is notifying the public that EPA has made an insignificance finding through the transportation conformity adequacy process for directly emitted fine particulate matter (PM 2.5 ) and nitrogen oxides (NO X ) emissions as contained in the 1997 PM 2.5 attainment demonstration for the Kentucky portion of the tri-state Huntington-Ashland nonattainment area. The tri-state Huntington-Ashland 1997 annual PM 2.5 nonattainment area is comprised of Boyd County, Kentucky; Cabell and Wayne Counties, West Virginia; Lawrence and Scioto Counties, Ohio; and the partial Counties of Lawrence in Kentucky; Mason in West Virginia; and Adams and Gallia in Ohio. On December 5, 2008, the Commonwealth of Kentucky, through the Division of Air Quality (DAQ), submitted an attainment demonstration for the 1997 annual PM 2.5 standard for the Kentucky portion of the tri-state Huntington-Ashland area (hereafter referred to as the Ashland Area). As a result of EPA's insignificance finding, the Ashland Area is no longer required to perform regional emissions analyses for either directly emitted PM 2.5 or NO X as part of future PM 2.5 conformity determinations for the 1997 annual PM 2.5 air quality