Approval and Promulgation of Air Quality Implementation Plans; Designation of Areas for Air Quality Planning Purposes; Pennsylvania; Redesignation of the Allegheny County Carbon Monoxide Nonattainment Area and Approval of Miscellaneous Revisions

EPA is taking direct final action to approve a request for Pennsylvania for redesignation of the carbon monoxide (CO) nonattainment area in Allegheny County, to attainment of the CO national ambient air quality standard (NAAQS). EPA is also approving the plan for maintaining the CO standard in Allegheny County, as well as the 1990 base year CO emissions inventory for Allegheny County. Pennsylvania's Redesignation Request and Maintenance Plan was submitted to EPA on August 17, 2001. The 1990 base year inventory was submitted to EPA on November 12, 1992, and revised by the August 17, 2001, submittal. EPA is approving the redesignation request, the maintenance plan and the emissions inventory in accordance with the requirements of the Clean Air Act.