Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Texas; Beaumont/Port Arthur Ozone Nonattainment Area: Redesignation to Attainment for the 1997 8-Hour Ozone Standard and Determination of Attainment for the 1-Hour Ozone Standard

摘要

EPA is proposing to approve a request from the State of Texas to redesignate the Beaumont-Port Arthur (BPA) Texas ozone nonattainment area to attainment of the 1997 8-hour ozone standard. In proposing to approve this request, EPA also proposes to approve as a revision to the BPA State Implementation Plan (SIP), a 1997 8-hour ozone maintenance plan with a 2021 Motor Vehicle Emissions Budget (MVEB). EPA is proposing to determine that the BPA nonattainment area has attained the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS), based on complete, quality-assured, and certified ambient air quality monitoring data for the 2005-2007 and 2006-2008 monitoring periods, as well as data from 2009 that are in EPA's Air Quality System (AQS) database but not yet certified, that demonstrate that the area has attained and is continuing to attain the 1997 8-hour ozone NAAQS. EPA also is proposing to make a determination that the BPA area is meeting the 1-hour ozone standard based upon three years of complete, quality- assured, and certified ambient air quality monitoring data for the 2005-2007 and 2006-2008 monitoring periods, as well as data from 2009 in AQS but not yet certified. EP