Approval and Limited Approval and Limited Disapproval of Air Quality Implementation Plans; California; Mendocino County Air Quality Management District; Stationary Source Permits

The Environmental Protection Agency (EPA) is finalizing action on four permitting rules submitted as a revision to the Mendocino County Air Quality Management District ("MCAQMD" or "the District") portion of the applicable state implementation plan (SIP) for the State of California pursuant to requirements under the Clean Air Act (CAA or Act). We are finalizing a limited approval and limited disapproval of one rule and finalizing approval of the remaining three permitting rules. The amended rules govern the issuance of permits for stationary sources, including review and permitting of minor sources, and major sources and major modifications under part C of title I of the Act. The limited disapproval action triggers an obligation for EPA to promulgate a Federal Implementation Plan (FIP) for the specific New Source Review (NSR) program deficiencies unless California submits and we approve SIP revisions that correct the deficiencies within two years of the final action.