DRC-2023-066300 - 0901a0688121bbc8

DRC-2023-066300 195 North 1950 West • Salt Lake City, UT Mailing Address: P.O. Box 144880 • Salt Lake City, UT 84114-4880 Telephone [phone] • Fax [phone] • T.D.D. 711
www.deq.utah.gov Printed on 100% recycled paper
State of Utah
SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor
Department of Environmental Quality
Kimberly D. Shelley Executive Director DIVISION OF WASTE MANAGEMENT AND RADIATION CONTROL Douglas J. Hansen Director June 16, 2023

Kathy Weinel, Quality Assurance Manager Energy Fuels Resources (USA) Inc.
225 Union Boulevard., Suite 600
Lakewood, CO 80228 RE: Energy Fuels Resources (USA) Inc., White Mesa Uranium Mill April 25, 2023, Request to Return Certain Groundwater Monitoring Parameters to Baseline Monitoring Frequency
Utah Groundwater Discharge Permit No. UGW370004
Dear Ms. Weinel: The Division of Waste Management and Radiation Control (Division) has completed its review of the
Energy Fuels Resources (USA) Inc. (EFRI) April 25, 2023, State of Utah Ground Water Discharge
Permit No. UGW370004 White Mesa Uranium Mill – Removal of Certain Groundwater Monitoring
Parameters from Accelerated Monitoring Status. Per review, EFRI requests that certain monitoring well parameters be returned to baseline monitoring as
listed on the table below:

Monitoring
Well Parameter
Number of Consecutive
Sample Results Below the GWCL
Baseline Monitoring
Frequency
MW-25 Total Dissolved Solids 11 Quarterly
MW-12 Selenium 9 Semi-Annual MW-12 Uranium 8 Semi-Annual
It was noted per review of groundwater monitoring data, including laboratory data sheets included with the EFRI Request, that Total Dissolved Solids sample results for MW-25, Selenium sample results for MW-12, and Uranium sample results for MW-12 have been below the Permitted Ground Water
Compliance Limits (GWCLs) for eight or more consecutive accelerated sampling events.
(Over)

Per past Division protocols, accelerated monitoring may be discontinued if at least eight consecutive
samples show concentrations below the GWCL; therefore, the request to return to baseline monitoring for the wells/parameters on the table above is hereby approved. If you have any questions, please call Christopher Leahy at 385-602-5505.

Sincerely,
Phil Goble, Uranium Mills and Radioactive Materials Section Manager
Division of Waste Management and Radiation Control PRG/CL/jk
c: Grant Sunada, Executive Director/Health Officer, San Juan County Public Health Department
Ronnie Nieves, Environmental Health Director, San Juan County Public Health Department Russell Seeley, District Engineer, UDEQ