Approval and Promulgation of 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 disapproving revisions to the Texas State Implementation Plan (SIP) submitted to meet certain requirements under section 182(c) of the Clean Air Act (CAA) for the Dallas/Fort Worth (DFW) nonattainment area under the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS or 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 has also determined that the DFW nonattainment area is currently attaining the 1997 ozone NAAQS. This determination is based upon complete, quality-assured and certified ambient air monitoring data that show the area has monitored attainment of the 1997 ozone NAAQS for the 2012-2014 monitoring period. Thus, the requirements to submit an attainment demonstration and other planning SIPs related to attainment of the 1997 ozone NAAQS, and the sanctions clock and the EPA's obligation to promulgate an attainment demonstration Federal Implementation Plan (FIP) for the DFW area are suspended for so long as the area continues to attain the 1997 ozone NAAQS.