DRC-2023-069726 - 0901a068812531fc

DRC-2023-069726 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 August 22, 2023

Kathy Weinel, Quality Assurance Manager Energy Fuels Resources (USA) Inc.
225 Union Blvd., Suite 600
Lakewood, CO 80228 RE: Energy Fuels Resources (USA) Inc., White Mesa Uranium Mill July 11, 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 review of the
Energy Fuels Resources (USA) Inc. (EFRI), July 11, 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 the monitoring well parameter listed on the table below be returned to
baseline monitoring:

Monitoring Well Parameter Number of Consecutive Sample Results Below the GWCL
Baseline Monitoring Frequency
MW-11 Total Dissolved Solids 8 Quarterly
It was noted per review of groundwater monitoring data, including independent review of laboratory data sheets, that Total Dissolved Solids sample results for MW-11 have been below the permitted Ground Water Compliance Limits (GWCLs) for eight or more consecutive accelerated sampling events.
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 listed on the table above is hereby approved. (Over)

If you have any questions, please call Chris 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