40 CFR Parts 52 and 81 - Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes Tennessee Redesignation of the Shelby County, Tennessee Portion of the Memphis, TN-Arkansas 1997 8-Hour Ozone Nonattainme

• Date: May 05, 2010
• Source: www.epa.gov

EPA is taking final action to approve a request submitted on February 26, 2009, from the State of Tennessee, through the Tennessee Department of Environment and Conservation (TDEC), Air Pollution Control Division, to redesignate the Tennessee 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 Shelby County, Tennessee and Crittenden County, Arkansas. EPA’s approval of the redesignation request is based on the determination that the bistate 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 Tennessee State Implementation Plan (SIP) including the 1997 8-hour ozone maintenance plan for Shelby County, Tennessee that contains the new 2006, 2009, 2017, and 2021 motor vehicle emission budgets (MVEBs) for nitrogen oxides (NOX ) and volatile organic compounds (VOC) for Shelby County, Tennessee. This action also approves the emissions inventory submitted with the maintenance plan (under the CAA section 182(a)(1)). The State of Arkansas has submitted a similar redesignation request and maintenance plan for the Arkansas portion of this 1997 8-hour ozone area. EPA is taking action on Arkansas’ redesignation request, emissions inventory and maintenance plan through a separate rulemaking action. On March 12, 2008, EPA issued a revised 8-hour ozone standard. EPA later announced on September 16, 2009, that it may reconsider this revised ozone standard. The current action, however, is being taken to address requirements under the 1997 8-hour ozone NAAQS. Requirements for the bi-state Memphis Area under the 2008 standard will be addressed in the future.

Effective Date: This rule will be effective February 3, 2010.

 

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