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       UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
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REGION 8
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1595 Wynkoop Street
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Denver, CO   80202-1129
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Phone 800-227-8917
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		www.epa.gov/region8

Ref: 8ARD-PM

The Honorable Julius Murray, Chairman
Ute Business Committee
P.O. Box 190 
Ft. Duchesne, UT 84026-0190
(email: juliusm@utetribe.com)

Re:	Draft Part 71 Response to Comments for Clean Air Act title V Operating Permit, Permit #V-UO-000004-2019.00, Deseret Generation and Transmission Co-operative, Bonanza Power Plant 

Dear Chairman Murray

The EPA is writing to inform you of the completion of a draft Response to Comments (RTC) for the Clean Air Act title V renewal permit for Bonanza Power Plant (Bonanza). This analysis follows the EPA's proposal to renew the title V permit for Bonanza on February 9, 2021. The original title V permit for Bonanza was issued on January 7, 2015, and permits are subject to renewal every five years. During the permit renewal process, the EPA met with members of the Ute Business Committee on September 22, 2020. As follow-up to that meeting, the Ute Business Committee requested in a letter dated October 14, 2020, that the EPA hold a public hearing regarding the permit renewal. The EPA met with Tribal representatives on January 12, 2021 and held a public meeting on the permit renewal on March 11, 2021. While Tribal representatives did not attend the public meeting, the Tribe submitted a comment letter on March 22, 2021 (March 22[nd] letter). The EPA has prepared the attached draft RTC document to address the comments raised in the Ute Business Committee's March 22[nd] letter. On August 30, 2023, the EPA met with Tribal representatives to consult on the title V permit renewal and a minor New Source Review permit modification for peaking engines. Prior to the meeting on August 30[th], EPA provided an electronic copy of the RTC to the Tribe on August 29[th].

Additionally, on September 20, 2023, the EPA has a follow-up consult on the title V permit renewal and a minor New Source Review permit modification. Please submit any written recommendations you may have concerning the attached draft RTC by 5:00 p.m. MT on Friday, September 22, 2023, to Suman Kunwar, of my staff, at kunwar.suman@epa.gov.
						
                              Sincerely,
                                    
						  Adrienne Sandoval
                                Director 
                                Air and Radiation Division

Attachment: Draft EPA Response to Comments Document
