Approval and Promulgation of Implementation Plans; AR; Redesignation of the Crittenden County, 2008 8-Hour Ozone Nonattainment Area to Attainment

On December 10, 2015, the State of Arkansas, through the Arkansas Department of Environment Quality (ADEQ), submitted a request for the Environmental Protection Agency (EPA) to redesignate the portion of Arkansas that is within the Memphis, Tennessee-Mississippi- Arkansas (Memphis, TN-MS-AR) 2008 8-hour ozone nonattainment area (hereafter referred to as the ``Memphis, TN-MS-AR Area'' or ``Area'') and to approve a State Implementation Plan (SIP) revision containing a maintenance plan for the Area. EPA has determined that the Memphis, TN- MS-AR Area is attaining the 2008 8-hour ozone national ambient air quality standards (NAAQS); is approving the State's plan for maintaining attainment of the 2008 8-hour ozone NAAQS in the Area, including the motor vehicle emission budgets (MVEBs) for nitrogen oxides (NOX) and volatile organic compounds (VOC) for the years 2012 and 2027 for the Arkansas portion of the Area, into the SIP; and is redesignating the Arkansas portion of the Area to attainment for the 2008 8-hour ozone NAAQS. EPA is also notifying the public of the status of EPA's adequacy determination for the MVEBs for the Arkansas portion of the Memphis, TN-MS-AR Area.