Limited Federal Implementation Plan; Prevention of Significant Deterioration Requirements for Fine Particulate Matter (PM2.5)
In this rulemaking, the Environmental Protection Agency (EPA) is proposing a limited Federal Implementation Plan (FIP) under the Clean Air Act (CAA or Act) to apply to the North Coast Unified Air Quality Management District (North Coast Unified AQMD or District) in California. This limited FIP would implement provisions to regulate fine particulate matter (PM2.5) under the CAA Prevention of Significant Deterioration (PSD) program within the District. The EPA previously issued two findings of failure to submit a State Implementation Plan (SIP) addressing these PSD requirements and also issued a partial disapproval action applicable to the North Coast Unified AQMD portion of the California SIP that triggered the duty under CAA section 110(c)(1) for the EPA to promulgate this limited FIP. If we finalize this action as proposed, the EPA will be the CAA PSD permitting authority for any new or modified major sources subject to PSD review for PM2.5 or its precursors within the District.