Approval and Promulgation of Air Quality Implementation Plans; Texas; Dallas/Fort Worth 1-Hour Ozone Nonattainment Area; Determination of Attainment of the 1-Hour Ozone Standard

The EPA has determined that the Dallas/Fort Worth (DFW) 1-hour ozone nonattainment area is currently attaining the 1-hour 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 1-hour ozone NAAQS for the 2004-2006 monitoring period. In addition, quality controlled and quality assured ozone data for 2007 and 2008 that are available in the EPA Air Quality System database show this area continues to attain the 1-hour ozone NAAQS. The requirements for this area to submit an attainment demonstration or 5% Increment of Progress (IOP) plan, a reasonable further progress (RFP) plan, contingency measures, and other planning State Implementation Plans (SIPs) related to attainment of the 1-hour ozone NAAQS are suspended for so long as the area continues to attain the 1-hour ozone NAAQS.