Approval and Promulgation of Implementation Plans; Alaska: Infrastructure Requirements for the 1997 8-Hour Ozone National Ambient Air Quality Standard

EPA is approving the State Implementation Plan (SIP) submittals from the State of Alaska to demonstrate that the SIP meets the requirements of section 110(a)(1) and (2) of the Clean Air Act (CAA) for the National Ambient Air Quality Standards (NAAQS) promulgated for ozone on July 18, 1997. EPA finds that the Alaska SIP meets the following 110(a)(2) infrastructure elements for the 1997 8- hour ozone NAAQS: (A), (B), (C), (D)(ii), (E), (F), (G), (H), (J), (K), (L), and (M). EPA is concurrently approving a number of revisions to the Alaska SIP as a necessary condition to approving the 110(a)(2) infrastructure elements for ozone. Specifically, EPA is approving revisions submitted by Alaska to update the SIP to include the ozone standard at an 8-hour averaging period, the associated federal method for measuring and monitoring ozone in ambient air, a general definition of ozone, federal Prevention of Significant Deterioration (PSD) program changes to regulate NOx as a precursor to ozone, and provisions to satisfy CAA section 128 conflict of interest disclosure requirements.