Withdrawal of Approval and Disapproval of Air Quality Implementation Plans; California; San Joaquin Valley; Contingency Measures for the 1997 PM2.5
The Environmental Protection Agency (EPA) is withdrawing a May 22, 2014 final action approving a state implementation plan (SIP) revision submitted by the State of California under the Clean Air Act (CAA) to address contingency measure requirements for the 1997 annual and 24-hour national ambient air quality standards (NAAQS) for fine particulate matter (PM2.5) in the San Joaquin Valley. Simultaneously, EPA is disapproving this SIP submission. These final actions are in response to a decision issued by the U.S. Court of Appeals for the Ninth Circuit (Committee for a Better Arvin v. EPA, 786 F.3d 1169 (9th Cir. 2015)) remanding EPA's approval of a related SIP submission and rejecting EPA's rationale for approving plan submissions that rely on California mobile source control measures to meet SIP requirements such as contingency measures, which was a necessary basis for the May 22, 2014 final rule. Finally, EPA is issuing a protective finding for transportation conformity determinations for the disapproval.