Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Revisions to the Ozone Maintenance Plan for the Huntington-Ashland Area

EPA is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of West Virginia. This revision amends West Virginia's ten-year plan to maintain the national ambient air quality standard (NAAQS) for ozone in the Huntington-Ashland area. The maintenance plan is being amended to implement contingency measures in response to recorded violations of the 1-hour ozone NAAQS, and to revise the motor vehicle emission sub-budgets for the West Virginia counties (Cabell and Wayne) that are located in the Huntington-Ashland area. This action is being taken under the Clean Air Act (the Act).