                                       
                               December 4, 2023



Ref: 8ARD-PM

The Honorable Julius Murray
Chairman
Ute Business Committee
P.O. Box 190
Ft. Duchesne, Utah  84026-0190
juliusm@utetribe.com 

Re: 	Final Part 71 Operating Permit, Permit #V-UO-000004-2019.00, Deseret Generation and Transmission Co-operative, Bonanza Power Plant

Dear Chairman Murray

This is regarding renewal of the 40 CFR part 71 title V operating permit (Part 71 permit) for Deseret Generation and Transmission Co-operative's (Deseret's) Bonanza Power Plant. In response to a request from the Ute Business Committee dated October 14, 2020, the EPA held a public hearing on the draft Part 71 permit renewal on March 11, 2021. The public comment period for the draft permit ended on March 11, 2021. The EPA received one comment letter from Deseret during the comment period. The Ute Business Committee transmitted a letter to the EPA dated March 22, 2021, providing the Tribe's comments on the draft Part 71 permit renewal. 

On August 30, 2023, the EPA met with representatives from the Ute Business Committee to consult on the Part 71 permit renewal and a Minor New Source Review (MNSR) permit for a modification to add natural gas-fired peaking engines to the facility. Before that meeting, on August 29, 2023, the EPA provided an electronic copy of a draft comprehensive Response to Comments (RTC) document to the Tribe for review. The EPA transmitted a second copy of the draft RTC document to the Tribe on September 11, 2023, and had a follow-up consultation with the Tribe on September 20, 2023. On October 10, 2023, the Tribe transmitted a letter to the EPA with comments on the draft RTC document.

We have reviewed the comments on the draft Part 71 permit renewal from Deseret and provided responses in "Enclosure 1 - Response to Comments Document." We have made revisions to the draft permit in response to those comments. We have also reviewed the Tribe's comments on the draft RTC document and have enclosed a final comprehensive RTC document to address the comments in the Tribe's March 22, 2021, and October 10, 2023 letters. 

Based on the information provided in Deseret's Part 71 permit renewal application, subsequent application updates and public comments on the draft permit, the EPA hereby issues the enclosed final renewed Part 71 permit for the Bonanza Power Plant. The new permit number is #V-UO-000004-2019.00.

Please review each condition carefully and note any restrictions placed on this source. Procedures for appealing this permit can be found in 40 CFR 71.11(l). A petition to the Environmental Appeals Board (EAB) must be filed within 30 days of receipt of this final permit action. The permit will be effective on January 3, 2024, provided there are no appeals filed with the EAB.

If you have any questions concerning the enclosed final permit, please contact Suman Kunwar, of my staff, at (303) 312-6095 or at kunwar.suman@epa.gov.

							Sincerely,
							
							Adrienne Sandoval
							Director
							Air and Radiation Division


ENCLOSURES
    Response to Comments Document
    Deseret Bonanza Title V Response to Tribe Comments

cc:  Mitch Holditch, Partner, Native Law Group, MHolditch@nativelawgroup.com
	Lonnie Favel, Air Quality Program Director, Ute Indian Tribe, lonnief@utetribe.com
