Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; State of Arizona; Redesignation of Phoenix-Mesa Area to Attainment for the 1997 8-Hour Ozone Standard

The Environmental Protection Agency (EPA) is approving, as a revision to the Arizona state implementation plan, a request from the Arizona Department of Environmental Quality to redesignate the Phoenix- Mesa ozone nonattainment area to attainment of the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS or "standard") because the request meets the statutory requirements for redesignation under the Clean Air Act. EPA is also approving the State's plan for maintaining the 1997 ozone standard in the Phoenix-Mesa area for 10 years beyond redesignation, and the inventories and related motor vehicle emissions budgets within the plan, because they meet the applicable requirements for such plans and budgets.