Proposed rule · 2025-13906

Air Plan Revisions; California; Mojave Desert Air Quality Management District; New Source Review; Stationary Source Permits

The Environmental Protection Agency (EPA) is proposing conditional approval of five permitting rules as a revision to the Mojave Desert Air Quality Management District (MDAQMD) portion of the California State Implementation Plan (SIP). These are revisions to the District's New Source Review (NSR) air permitting program rules for new and modified sources of air pollution under the Clean Air Act (CAA or "Act"). The submitted rules address deficiencies identified in a previous limited disapproval action and incorporate other revisions related to the NSR permitting requirements. If finalized, this action will update the MDAQMD's current SIP with the revised rules. As a separate action in this Federal Register, we are making an interim final determination that will stay or defer the imposition of CAA sanctions associated with our previous limited disapproval action.