Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Nevada; Wintertime Oxygenated Gasoline Rule; Vehicle Inspection and Maintenance Program; Redesignation of Truckee Meadows to Attainment for the Carbon Monoxide Standard

EPA is approving certain submittals by the State of Nevada of revisions to the Nevada state implementation plan that are intended to provide for attainment and maintenance of the carbon monoxide national ambient air quality standard in the Truckee Meadows nonattainment area located within Washoe County, Nevada. These revisions include a local wintertime oxygenated gasoline rule, a "basic" vehicle inspection and maintenance program (including a performance standard evaluation), current statutory provisions and State rules governing mobile sources, a maintenance plan and related motor vehicle emissions budgets. EPA is also approving Nevada's request to redesignate the Truckee Meadows carbon monoxide nonattainment area to attainment. EPA is deferring action on the proposal to rescind a provision previously approved in the plan and related to inspection and maintenance of vehicles operated on Federal installations. EPA is taking these actions pursuant to those provisions of the Clean Air Act that obligate the Agency to take action on submittals of revisions to state implementation plans and requests for redesignation. This action makes certain State and local measures and commitments related to attainment and maintenance of the carbon monoxide standard in Truckee Meadows federally enforceable as part of the Nevada state implementation plan.