Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Revision to the 1-Hour Ozone Maintenance Plan for the Pittsburgh-Beaver Valley Area to Reflect the Use of MOBILE6

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EPA is taking direct final action to approve a State Implementation Plan (SIP) revision submitted by the Commonwealth of Pennsylvania. The revision amends Pennsylvania's ten-year plan to maintain the 1-hour ozone national ambient air quality standard (NAAQS) in the Pittsburgh-Beaver Valley ozone maintenance area (the Pittsburgh area). The maintenance plan is being amended to revise the volatile organic compound (VOC) and nitrogen oxides (NO X ) motor vehicle emission budgets (MVEBs) to reflect the use of MOBILE6. The intended effect of this action is to approve a SIP revision that will better enable the Commonwealth of Pennsylvania to maintain attainment of the 1-hour ozone NAAQS in the Pittsburgh area. This action is being taken in accordance with the requirements of the Clean Air Act.