Partial Approval, Partial Disapproval of California Air Plan Revisions, Antelope Valley Air Quality Management District

The Environmental Protection Agency (EPA) is proposing a partial approval and partial disapproval of revisions to the Antelope Valley Air Quality Management District (AVAQMD or District) portion of the California State Implementation Plan (SIP). These revisions concern the District's demonstration regarding Reasonably Available Control Technology (RACT) requirements for the 1997 and 2008 8-hour ozone National Ambient Air Quality Standards (NAAQS). We are proposing action on local SIP revisions under the Clean Air Act (CAA or the Act). We are taking comments on this proposal and plan to follow with a final action.