Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Determination of Attainment of the 2006 24-Hour Fine Particulate Standard for the Liberty-Clairton Nonattainment Area

The Environmental Protection Agency (EPA) is finalizing a determination of attainment regarding the Liberty-Clairton, Pennsylvania 2006 24-hour fine particulate matter (PM<INF>2.5</INF>) nonattainment area (hereafter "Liberty-Clairton Area" or "the Area"). EPA is determining that the Liberty-Clairton Area has attained the 2006 24-hour PM<INF>2.5</INF> National Ambient Air Quality Standard (NAAQS), based upon quality-assured, quality-controlled and certified ambient air monitoring data for the calendar years 2012-2014. EPA's final "clean data determination" will suspend the requirements to submit for the Liberty-Clairton Area an attainment demonstration, reasonably available control measures (RACM), reasonable further progress (RFP), and contingency measures related to attainment of the 2006 24-hour PM<INF>2.5</INF> NAAQS, for so long as the Area continues to attain the 2006 24-hour PM<INF>2.5</INF> NAAQS. This final determination will not constitute a redesignation to attainment. This final action is being taken under the Clean Air Act (CAA).