Revisions to the California State Implementation Plan, Sacramento Metropolitan Air Quality Management District

The Environmental Protection Agency (EPA) is proposing a partial approval and partial disapproval of revisions to the Sacramento Metropolitan (Metro) Air Quality Management District (SMAQMD 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 8-hour ozone National Ambient Air Quality Standard (NAAQS). We are proposing action on a local SIP revision under the Clean Air Act (CAA or the Act). We are taking comments on this proposal and plan to follow with a final action.