Approval and Promulgation of Air Quality Implementation Plans; Ohio; Redesignation of the Ohio Portion of the Wheeling Area to Attainment of the 1997 Annual Standard for Fine Particulate Matter

摘要

On April 16, 2012, the Ohio Environmental Protection Agency submitted a request for EPA to approve the redesignation of the Ohio portion of the Wheeling, West Virginia-Ohio (WV-OH), nonattainment area to attainment of the 1997 annual standard for fine particulate matter (PM 2.5 ). EPA is proposing to approve Ohio's request. EPA is proposing to determine that the entire Wheeling West Virginia-Ohio area attains the 1997 annual PM 2.5 standard, based on the most recent three years of certified air quality data. EPA is proposing to approve, as revisions to the Ohio State Implementation Plan (SIP), the state's plan for maintaining the 1997 annual PM 2.5 National Ambient Air Quality Standard (NAAQS) through 2022 in the Ohio portion of the area. EPA is proposing to approve a 2005 emissions inventory for the Ohio portion of the Wheeling area as meeting the comprehensive emissions inventory requirement of the Clean Air Act (CAA or Act). Ohio's maintenance plan submission includes an insignificance finding for the mobile source contribution of PM 2.5 and nitrogen oxides (NO X ) to Ohio's portion of the Wheeling PM 2.5 Area for transportation conformity purposes; EPA agrees with this finding