Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Section 110(a)(1) 8-Hour Ozone Maintenance Plan and Amendments to the 1-Hour Ozone Maintenance Plan

EPA is approving State Implementation Plan (SIP) revisions submitted by West Virginia. These revisions pertain to: the maintenance plan prepared by West Virginia to maintain the 8-hour national ambient air quality standard (NAAQS) for ozone in Greenbrier County, which is designated attainment for the ozone NAAQS; and two amendments to the existing 1-hour ozone maintenance plan, which include removal of the obligation to submit a maintenance plan for the 1-hour NAAQS eight years after approval of the initial 1-hour maintenance plan, and removal of the State's obligation to implement contingency measures upon a violation of the 1-hour NAAQS. The purpose of this approval is to ensure Federal enforceability of the state air program plan and to maintain consistency between the State-adopted plan and the approved SIP. This action is being taken under the Clean Air Act (CAA).