Adequacy Status of the Knoxville, TN 1997 8-Hour Ozone Maintenance Plan Motor Vehicle Emission Budgets for Transportation Conformity Purposes

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EPA is notifying the public that it has found that the motor vehicle emissions budgets (MVEBs) contained in the State Implementation Plan (SIP) revision for the Knoxville, Tennessee 1997 8-Hour Ozone Maintenance Plan are adequate for transportation conformity purposes. This revision was submitted on July 14, 2010, by the Tennessee Department of Environment and Conservation (TDEC). The Knoxville 1997 8-Hour ozone nonattainment area (hereafter referred to as "the Knoxville Area") for which MVEBs are established in today's notice is comprised of the entire counties of Anderson, Blount, Jefferson, Knox, Sevier, and Loudon as well as the portion of Cocke County that falls within the boundaries of the Great Smoky Mountains National Park. On March 2, 1999, the United States Court of Appeals for the District of Columbia Circuit (DC Circuit) ruled that submitted SIPs cannot be used for transportation conformity determinations until EPA has affirmatively found them adequate. As a result of EPA's finding, the Knoxville Area must use the MVEBs for future conformity determinations for the 1997 8-hour ozone national ambient air quality standards (NAAQS).