Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Arkansas; Redesignation of the Crittenden County, AR Portion of the Memphis, Tennessee-Arkansas 1997 8-Hour Ozone Nonattainment Area to Attainment

概要

EPA is taking final action to approve a request submitted on February 24, 2009, from the State of Arkansas to redesignate the Arkansas portion of the bi-state Memphis, Tennessee-Arkansas 8-hour ozone nonattainment area (hereafter referred to as the "bi-state Memphis Area") to attainment for the 1997 8-hour ozone national ambient air quality standards (NAAQS). The bi-state Memphis 1997 8-hour ozone NAAQS nonattainment area is composed of Crittenden County, Arkansas and Shelby County, Tennessee. EPA's approval of the redesignation request is based on the determination that the bi-state Memphis Area has met the criteria for redesignation to attainment set forth in the Clean Air Act (CAA), including the determination that the bi-state Memphis Area has attained the 1997 8- hour ozone standard. Additionally, EPA is approving a revision to the Arkansas State Implementation Plan (SIP) including the 1997 8-hour ozone maintenance plan for Crittenden County, Arkansas that contains the new 2006 and 2021 motor vehicle emission budgets (MVEBs) for nitrogen oxides (NO X ) and volatile organic compounds (VOC) for Crittenden County, Arkansas. The State of Tennessee has submitted a similar redesigna