Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Redesignation of the Johnstown (Cambria County) Ozone Nonattainment Area to Attainment and Approval of the Area's Maintenance Plan and 2002 Base Year Inventory

EPA is approving a State Implementation Plan (SIP) revision submitted by the Commonwealth of Pennsylvania. The Pennsylvania Department of Environmental Protection (PADEP) is requesting that the Johnstown (Cambria County) ozone nonattainment area (Cambria Area) be redesignated as attainment for the 8-hour ozone ambient air quality standard (NAAQS). EPA is approving the ozone redesignation request for Cambria Area. In conjunction with its redesignation request, PADEP submitted a SIP revision consisting of a maintenance plan for Cambria Area that provides for continued attainment of the 8-hour ozone NAAQS for at least 10 years after redesignation. EPA is approving the 8-hour maintenance plan. PADEP also submitted a 2002 base year inventory for the Cambria Area which EPA is approving. In addition, EPA is approving the adequacy determination for the motor vehicle emission budgets (MVEBs) that are identified in the Cambria Area maintenance plan for purposes of transportation conformity, and is approving those MVEBs. EPA is approving the redesignation request, and the maintenance plan and the 2002 base year emissions inventory as revisions to the Pennsylvania SIP in accordance with the requirements of the Clean Air Act (CAA).