Withdrawal of Approval of Air Quality Implementation Plans; California; San Joaquin Valley; 1-Hour and 8-Hour Ozone Extreme Area Plan Elements

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EPA is proposing to withdraw a March 8, 2010 final action approving state implementation plan (SIP) revisions submitted by the State of California under the Clean Air Act (CAA) to provide for attainment of the 1-hour ozone National Ambient Air Quality Standards (NAAQS) in the San Joaquin Valley extreme ozone nonattainment area. This proposed action is in response to a decision issued by the U.S. Court of Appeals for the Ninth Circuit (Sierra Club v. EPA, 671 F.3d 955 (9th Cir. 2012)) remanding EPA's approval of these SIP revisions. In addition, EPA is proposing to withdraw our approval of a portion of a March 1, 2012 final rule approving SIP revisions submitted by California to provide for attainment of the 1997 8-hour ozone NAAQS in the San Joaquin Valley. The portion of this final action for which EPA is proposing to withdraw its approval addressed requirements regarding emissions growth caused by growth in vehicle miles traveled under the CAA. This proposed action is in response to a decision issued by the U.S. Court of Appeals for the Ninth Circuit (Association of Irritated Residents, 632 F.3d 584 (9th Cir. 2011), as amended Jan. 27, 2012), rejecting EPA's interpretation of the