Approval and Promulgation of Air Quality Implementation Plans; Washington

The Environmental Protection Agency (EPA) is approving the State Implementation Plan (SIP) revisions submitted by the State of Washington, Department of Ecology (Ecology). These revisions pertain to the plan to maintain the 1997 8-hour national ambient air quality standard (NAAQS) for ozone in the Vancouver portion of the Portland/ Vancouver Air Quality Maintenance Area (Pdx/Van AQMA). The maintenance plan for this area meets Clean Air Act (CAA) requirements and demonstrates that the Vancouver portion of the Pdx/Van AQMA will be able to remain in attainment for the 1997 ozone NAAQS through 2015. The EPA is approving the maintenance plan and minor revisions to the motor vehicle inspection and maintenance (I/M) regulations in the statewide Emission Check Program.