Adequacy Status of the Alabama Portion (Jackson County) of the Chattanooga, Tennessee 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 Alabama portion of the tri-state Chattanooga, Tennessee nonattainment area (hereafter referred to as the "Jackson County Area"). On October 14, 2009, the State of Alabama, through the Alabama Department of Environmental Management (ADEM), submitted an attainment demonstration plan for the 1997 annual PM 2.5 standard for Jackson County, Alabama as part of the tri-state Chattanooga 1997 PM 2.5 nonattainment area. The tri-state Chattanooga 1997 annual PM 2.5 nonattainment area is comprised of a portion of Jackson County, Alabama; Catoosa and Walker Counties, Georgia; and Hamilton County, Tennessee. As a result of EPA's finding, the portion of Jackson County within the tri-state Chattanooga 1997 PM 2.5 nonattainment area is no longer required to perform a regional emissions analysis for either directly emitted PM 2.5 or NO X as part of future PM 2.5 conformity determinations for the 1997 an