Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Ohio; Determination of Clean Data for the 2006 24-Hour Fine Particulate Standard for the Steubenville-Weirton Area

EPA is making a final determination regarding the two-state Steubenville-Weirton, Ohio-West Virginia nonattainment area (hereafter referred to as the "Steubenville-Weirton Area" or "Area") for the 2006 24-hour fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS). EPA is determining that the Steubenville-Weirton Area has attained the 24-hour 2006 PM<INF>2.5</INF> NAAQS. This determination is based upon complete, quality assured, and certified ambient air monitoring data showing that this area has monitored attainment of the 24-hour 2006 PM<INF>2.5</INF> NAAQS based on the 2008-2010 data. EPA's determination suspends the obligation of Ohio and West Virginia to submit, with respect to this area, attainment demonstrations, associated reasonably available control measures (RACM), reasonable further progress plans, contingency measures, and other planning State Implementation Plans (SIPs) related to attainment of the 2006 PM<INF>2.5</INF> standard for so long as the Area continues to meet the 24-hour 2006 PM<INF>2.5</INF> NAAQS.