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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: 8P-AR

Ms. Minnie Grant
Air Coordinator, Energy, Minerals, & Air
Energy and Minerals Department, Ute Indian Tribe
P.O. Box 70
Fort Duchesne, Utah  84026

Dear Ms. Grant:

The U.S. Environmental Protection Agency Region 8 is proposing to issue a synthetic minor permit for the existing Anadarko Uintah Midstream, LLC. (Anadarko), Diablo Compressor Station on the Uintah and Ouray Indian Reservation. As requested by Anadarko, this permit would incorporate enforceable requirements for the installation and operation of one field gas fired, 4-stroke, lean-burn compressor engine using catalytic emissions control systems. Anadarko also requested enforceable requirements to install and operate two low-emission glycol dehydration units and only instrument air-driven or low-bleed pneumatic controllers. Consistent with a 2008 federal Consent Decree, this permit is only intended to incorporate requested emission limits and provisions from the permit application for existing emissions units operating at the facility.

A public comment period for the proposed permit will begin on February 4, 2019, and end on March 6, 2019.

We have enclosed a CD and paper copy containing the proposed permit and supporting documentation, and we ask that you please make this material available for public review until the end of the public comment period. Comments may be submitted via mail, via email to R8AirPermitting@epa.gov, or through https://www.regulations.gov (Docket ID #EPA-R08-OAR-2018-0323). In addition, we have provided copies of the bulletin board public notice announcement and would appreciate it if you could post this announcement in prominent locations in your area. All of these documents will also be available for review in electronic format on our website at: https://www.epa.gov/caa-permitting/caa-permit­ public-comment-opportunities-region-8. 
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
If you have any questions concerning the enclosed proposed permit or technical support documents, please contact Claudia Smith, of my staff, at (303) 312-6520.   
                                          
                                       Sincerely,
                                                               
                                                   
                                      Monica Morales
                                      Director, Air Program
                                      Office of Partnerships and Regulatory Assistance
                                      
                                      
Enclosures

cc:  Bruce Pargeets, Director, Energy, Minerals and Air, Ute Indian Tribe

