Approval and Promulgation of Air Quality Implementation Plans; Interstate Transport for Utah

The Environmental Protection Agency (EPA) is proposing action on the portions of two submissions from the State of Utah that are intended to demonstrate that the State Implementation Plan (SIP) meets certain interstate transport requirements of the Clean Air Act (Act or CAA). These submissions address the 2008 ozone National Ambient Air Quality Standards (NAAQS) and 2008 lead (Pb) NAAQS. Specifically, the EPA is proposing to approve interstate transport prongs 1 and 2 for the 2008 Pb NAAQS, and proposing to disapprove prongs 1 and 2 for the 2008 ozone NAAQS.