

--------------------------------------------------------------------------------
 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

Ms. Martina Wilson 							
Environmental Director
Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation
P.O. Box 1027
Poplar, Montana  59255
martinawilson@fortpecktribes.net 

Re:	CWT Operating, LLC, EPU Deep 10-1/2 Production Facility 
	Permit #SMNSR-FP-000013-2022.002, Proposed Synthetic Minor New Source Review Permit

Dear Ms. Wilson:

The U.S. Environmental Protection Agency Region 8 is proposing to issue a permit in accordance with the Tribal Minor New Source Review (MNSR) Permit Program at 40 CFR part 49, for CWT Operating, LLC's existing EPU Deep 10-1/2 Production Facility. The purpose of the proposed permit is to establish emissions restrictions for existing crude oil production operations to create a synthetic minor source of criteria pollutants with respect to the Clean Air Act title V operating permit program at 40 CFR part 71.

The proposed permit contains emissions limitations, associated testing, monitoring, recordkeeping and reporting requirements for two existing 3-phase heater treater separators and an associated control device. 

A public comment period for the proposed permit will begin on June 7, 2023, and end on July 7, 2023. 

The proposed permit and supporting documents are available in the electronic docket at regulations.gov (Docket ID # EPA-R08-OAR-2022-0846), and we ask you 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 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-2022-0846). 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 proposed permit or technical support document, please contact Claudia Smith, at (303) 312-6520 or at smith.claudia@epa.gov.   

						Sincerely,
                                    
						Adrienne Sandoval
                              Director
                                    Air and Radiation Division


cc: 	Linda Weeks, Air Quality Coordinator, Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation, lweeks@fortpecktribes.net

