Approval of California Air Plan Revisions, South Coast Air Quality Management District

The Environmental Protection Agency (EPA) is proposing to approve revisions to the South Coast Air Quality Management District (SCAQMD) portion of the California State Implementation Plan (SIP). These revisions concern emissions of oxides of nitrogen (NOX) from facilities that emit four or more tons per year of NOX or oxides of sulfur (SOX). We are proposing to approve local rules to regulate these emission sources under the Clean Air Act (CAA or the Act). We are taking comments on this proposal and plan to follow with a final action.