Approval and Promulgation of Implementation Plans and Delegation of 112(l) Authority; State of Missouri

Missouri submitted its Rule 10 CSR 10-6.065, entitled ``Operating Permits,'' for Federal approval. The rule would establish a mechanism for creating federally enforceable limitations that would reduce sources' potential to emit such that sources could avoid major source permitting requirements. This action approves this rule as satisfying the criteria set forth in the Federal Register of June 28, 1989, for EPA approval of federally enforceable state operating permit programs (FESOP). In addition, this action addresses Missouri's program covering both criteria pollutants (regulated under section 110 of the Clean Air Act (CAA)) and hazardous air pollutants (HAP) (regulated under section 112).