Approval and Promulgation of Implementation Plans; Arizona; Motor Vehicle Inspection and Maintenance Programs

الملخص

EPA is proposing to approve two revisions to the Arizona State Implementation Plan submitted by the Arizona Department of Environmental Quality. These revisions consist of changes to Arizona's Basic and Enhanced Vehicle Emissions Inspection Programs that would exempt collectible vehicles in the Phoenix metropolitan area, and collectible vehicles and motorcycles in the Tucson metropolitan area, from emissions testing requirements; an updated performance standard evaluation for the vehicle emissions inspection program in the Phoenix area; and new contingency measures. EPA is proposing approval of these two state implementation plan revisions because they meet all applicable requirements of the Clean Air Act and EPA's regulations and because the exemptions would not interfere with attainment or maintenance of the national ambient air quality standards in the two affected areas. EPA is proposing this action under the Clean Air Act obligation to take action on State submittals of revisions to state implementation plans. The intended effect is to exempt these vehicle categories from the emissions testing requirements of the State's vehicle emissions inspection programs as approved for th