Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Redesignation of the West Virginia Portion of the Huntington-Ashland, WV-KY-OH 1997 Annual PM2.5 Nonattainment Area to Attainment and Approval of the Associated Maintenance Plan

요약

EPA is proposing to approve a redesignation request and State Implementation Plan (SIP) revision submitted by the State of West Virginia. The West Virginia Department of Environmental Protection (WVDEP) is requesting that the West Virginia portion of the Huntington- Ashland, WV-KY-OH-fine particulate matter (PM 2.5 ) nonattainment area ("Huntington-Ashland Area" or "Area") be redesignated as attainment for the 1997 annual PM 2.5 national ambient air quality standard (NAAQS). The Huntington-Ashland Area is comprised of Cabell and Wayne Counties and a portion of Mason County in West Virginia (West Virginia portion of the Area); Boyd County and a portion of Lawrence County in Kentucky; and Lawrence and Scioto Counties and portions of Adams and Gallia Counties in Ohio. In this rulemaking action, EPA is proposing to approve the PM 2.5 redesignation request for the West Virginia portion of the Area. EPA is also proposing to approve the maintenance plan SIP revision that the State submitted in conjunction with its redesignation request. The maintenance plan provides for continued attainment of the 1997 annual PM 2.5 NAAQS for 10 years after redesignation of the West Virginia portion of th