Approval and Promulgation of Air Quality Implementation Plans; Ohio; Dayton-Springfield, Steubenville-Weirton, Toledo, and Parkersburg-Marietta; 1997 8-Hour Ozone Maintenance Plan Revision to Approved Motor Vehicle Emissions Budgets

Zusammenfassung

Under the Clean Air Act, EPA is proposing to approve the request by Ohio to revise the 1997 8-hour ozone maintenance air quality state implementation plan (SIP) for the Dayton-Springfield and Toledo areas, and the Ohio portions of the Parkersburg-Marietta and Steubenville-Weirton, West Virginia-Ohio areas to replace onroad emissions inventories and motor vehicle emissions budgets (budgets) with inventories and budgets developed using EPA's Motor Vehicle Emissions Simulator (MOVES) emissions model. The Dayton-Springfield area consists of Clark, Greene, Miami, and Montgomery Counties. The Ohio portion of the Steubenville-Weirton, West Virginia-Ohio area consists of Jefferson County, Ohio. The Toledo area consists of Lucas and Wood Counties. The Ohio portion of the Parkersburg-Marietta, West Virginia-Ohio area consists of Washington County. Ohio submitted the SIP revision requests for the areas on the following dates: Dayton- Springfield on February 11, 2013; Steubenville-Weirton on March 15, 2013; Toledo on April 18, 2013; Parkersburg-Marietta on April 26, 2013.