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Public Notice

CHAPTER 6, SECTION 2 CONSRUCTION/MODIFICATION PERMIT - Department of Environmental Quality, Division of Air Quality PUBLIC NOTICE: In accordance with Chapter 6, Section 2(m) of the Wyoming Air Quality Standards and Regulations, notice is hereby given that the State of Wyoming, Department of Environmental Quality, Division of Air Quality, proposes to approve a request by American Colloid Company to modify the Colony East and West Plants by updating the burner size on three (3) rotary Dryers (CKD002-CKD004) from 37 MMBtu/hr to 40 MMBtu/hr and updating the pilot from 3.7 MMBtu/hr to 4.0 MMBtu/hr. The Colony East and West Plants are located in Sections 3 and 10, T56N, R61W, approximately one-half (1/2) mile northwest of Colony, in Crook County, Wyoming.

For the duration of the public comment period, the permit application, the agency’s analysis, and the public notice are available for public inspection online at, utilizing facility ID F021196 and permit number P0035907 under permits. This material may also be viewed online, at the above URL, utilizing a public computer at the Crook County Library, Sundance, Wyoming. Additionally, for the duration of the public comment period a copy of this public notice is available for public inspection at the Crook County Clerk’s Office, Sundance, Wyoming. In accordance with the Americans with Disabilities Act, special assistance or alternate formats will be made available upon request for individuals with disabilities.

Written comments may be directed to Nancy Vehr, Administrator, Division of Air Quality, Department of Environmental Quality, 200 West 17th St., Cheyenne, Wyoming 82002 or by fax

(307) 635-1784. Please reference A0014266 in your comment. Comments may also be submitted electronically through the Division’s website ( Comments submitted by email will not be included in the administrative record. All comments received by 5:00 p.m., Monday, March 6, 2023 will be considered in the final determination on this application. A public hearing will be conducted only if in the opinion of the administrator sufficient interest is generated or if an aggrieved party so requests. Para español, visite 

Publish: February 2, 2023

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