Approval and Promulgation of Air Quality Implementation Plans; Delaware; Reasonably Available Control Technology Under the 8-Hour Ozone National Ambient Air Quality Standard

EPA is approving a State Implementation Plan (SIP) revision submitted by the State of Delaware. This SIP revision pertains to the requirements in meeting the reasonably available control technology (RACT) under the 8-hour ozone national ambient air quality standard (NAAQS). These requirements are based on: Certification that previously adopted RACT controls in Delaware's SIP that were approved by EPA under the 1-hour ozone NAAQS are based on the currently available technically and economically feasible controls, and that they continue to represent RACT for the 8-hour implementation purposes; the adoption of new or more stringent regulations that represent RACT control levels; and a negative declaration that certain categories of sources do not exist in Delaware. This action is being taken under the Clean Air Act (CAA).