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

요약

EPA is proposing to approve three revisions to the Arizona State Implementation Plan submitted by the Arizona Department of Environmental Quality. Two of these revisions relate to an amendment to Arizona's Basic and Enhanced Vehicle Emissions Inspection Programs that would exempt motorcycles in the Phoenix metropolitan area from emissions testing requirements. The third revision would expand the geographic area in which various air quality control measures, including the vehicle emissions inspection program but also including other control measures, apply in the Phoenix metropolitan area. EPA is proposing approval of these SIP revisions because we have found that they meet all applicable requirements and would not interfere with reasonable further progress or attainment of any of the national ambient air quality standards. EPA is proposing this action under the Clean Air Act obligation to take action on State submittals of revisions to state implementation plans.