Partial Approval, Partial Disapproval and Promulgation of State Plans for Designated Facilities and Pollutants; Spokane Regional Clean Air Agency; Control of Emissions From Existing Large Municipal Waste Combustors

The Environmental Protection Agency (EPA) is taking final action to partially approve and partially disapprove a July 18, 2022, Clean Air Act (CAA) State Plan submitted by the Spokane Regional Clean Air Agency (SRCAA) to establish emission limits for existing large municipal waste combustors (MWC) and to provide for the implementation and enforcement of these limits. SRCAA submitted this State Plan to fulfill its requirements under the CAA in response to the EPA's May 10, 2006, promulgation of Emissions Guidelines and Compliance Times for Large MWC Constructed on or before September 20, 1994 (Emission Guidelines). The EPA is partially approving the State Plan because it meets the requirements of the Emission Guidelines for existing large MWC known to operate in Spokane County, Washington. The EPA is partially disapproving the State Plan because it omits requirements for fluidized bed combustors and air curtain incinerators, which are required elements of a State Plan. This action is being taken under the CAA.