Approval and Promulgation of Air Quality Implementation Plans; Texas; Attainment Demonstration for the Dallas/Fort Worth 1997 8-Hour Ozone Nonattainment Area; Determination of Attainment of the 1997 Ozone Standard

The Environmental Protection Agency (EPA) is proposing to disapprove revisions to the Texas State Implementation Plan (SIP) submitted to meet certain requirements under section 182(c) of the Clean Air Act (CAA or Act) for the Dallas/Fort Worth (DFW) nonattainment area under the 1997 8-hour ozone standard. The revisions address the attainment demonstration submitted on January 17, 2012, by the Texas Commission on Environmental Quality (TCEQ) for the DFW Serious nonattainment area. The EPA is also proposing to determine that the DFW 8-hour ozone nonattainment area is currently attaining the 1997 ozone National Ambient Air Quality Standard (NAAQS). This determination is based upon certified ambient air monitoring data that show the area has monitored attainment of the 1997 ozone NAAQS for the 2012-2014 monitoring period. If this proposed determination is made final, the requirements for this area to submit an attainment demonstration, a reasonable further progress (RFP) plan, contingency measures, and other planning SIPs related to attainment of the 1997 ozone NAAQS shall be suspended for so long as the area continues to attain the 1997 ozone NAAQS. This proposed action is consistent with the requirements of section 110 and part D of the CAA.