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                 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
                                   REGION 8
                              1595 Wynkoop Street
                            DENVER, CO   80202-1129
                          http://www.epa.gov/region8

EPA's Renewal Draft Air Quality Permit to Operate for the Deseret Generation and Transmission Co-operative, Bonanza Power Plant on the Uintah and Ouray Indian Reservation

Statement

Region 8 is proposing to issue a renewed air quality permit to operate under Federal Clean Air Act (CAA) title V (TV) and title 40 Code of Federal Regulations, part 71 for the Deseret Generation and Transmission Co-operative's Bonanza Power Plant (Bonanza) located on Indian country lands within the Uintah and Ouray Indian Reservation. The original permit was issued on December 5, 2014 and followed by two administrative amendments on October 19, 2015 and September 23, 2016, respectively. EPA is the permitting authority since the Ute tribe does not currently have an approved TV operating permit program.

The renewal draft TV permit includes requirements for controlling air pollutant emissions which come from the main boiler of the power plant and associated electric generating equipment. The draft permit discusses the main boiler emission limitations for particulate matter, sulfur dioxide and nitrogen oxides. Bonanza is a major source, emitting greater than 100 tons per year, for each of these pollutants in addition to carbon monoxide. Bonanza is also a major source of hazardous air pollutant (HAP) emissions, emitting greater than 25 tons per year of total HAP emissions. The draft permit also includes a coal consumption cap of 20,000,000 short tons for the period from January 1, 2020 through the end of service for the main boiler as well as other monitoring, recordkeeping and reporting requirements ensuring proper regulation of the facility.

For more information on Bonanza's TV permitting history, please visit: https://www.epa.gov/caa-permitting/title-v-operating-permit-deseret-generation-and-transmission-cooperative-bonanza