Partial Approval and Partial Disapproval of Air Quality State Implementation Plans; California; South Coast; Moderate Area Plan for the 2006 PM2.5

The Environmental Protection Agency (EPA) is approving in part and disapproving in part State implementation plan (SIP) revisions submitted by California to address moderate area Clean Air Act (CAA) requirements for the 2006 fine particulate (PM2.5) National Ambient Air Quality Standards (NAAQS) in the Los Angeles--South Coast air basin (South Coast) PM2.5 nonattainment area. These SIP revisions are the 2012 PM2.5 Plan, submitted February 13, 2013, and the 2015 Supplement, submitted March 4, 2015. We are disapproving the Reasonably Available Control Measure, Reasonably Available Control Technology (RACM/RACT), and Reasonable Further Progress elements of the SIP revisions because of new information indicating that the 2010 RECLAIM program does not meet the RACM/RACT requirement for certain sources of emissions. The EPA is prepared to work with the State to correct this deficiency. We are not finalizing our proposed action on the District's ports-related commitment at this time.