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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

Mr. Mike Natchees 
Air Quality Program Director
Ute Indian Tribe
P.O. Box 70
Fort Duchesne Utah  84026
Via email: miken@utetribe.comRe:	Caerus Uintah LLC, Natural Buttes Station, Permit #SMNSR-SU-000003-2019.001, Proposed Synthetic Minor New Source Review PermitDear Mr. Natchees:The U.S. Environmental Protection Agency Region 8 is proposing to issue a synthetic minor New Source Review (MNSR) permit for the existing Caerus Uintah, LLC (Caerus), Natural Buttes Station (Natural Buttes) on the Uintah and Ouray Indian Reservation. As requested by Caerus, this permit would incorporate enforceable requirements for the installation and operation of two field gas fired, 4-stroke, lean-burn compressor engine using catalytic emissions control systems. Caerus also requested enforceable requirements to install and operate only instrument air-driven or low- or no-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 August 20, 2020, and end on September 21, 2020.The proposed permit and supporting documentation are available in the electronic docket at Regulations.gov (Docket ID #EPA-R08-OAR-2019-0407), and we ask that you please assist members of the public who contact you with instructions on how to access the 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-2019-0407). 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 Lo. Rao, of my staff, at (303) 312-6241.   
                                          
                                      Sincerely,
                                                
                                      Carl Daly
                                      Acting Director
                                      Air and Radiation Division
                                      
                                      
Enclosures



