DRC-2023-074936 - 0901a068812a8291

DRC-2023-074936 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

November 6, 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 October 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) October 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 the 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
(or above for pH) the GWCL
Baseline Monitoring
Frequency
MW-30 Field pH 10 Quarterly

It was noted per review of groundwater monitoring data, including independent review of field data
sheets, that Field pH sample results for MW-30 have been below (or above for pH) the permitted
Groundwater 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 (or above for pH) the GWCL; therefore, the request to return to
baseline monitoring for the wells/parameters 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/wa

c: Grant Sunada, Health Director, San Juan Public Health Department
Ronnie Nieves, Environmental Health Director, San Juan Public Health Department
Russell Seeley, District Engineer, UDEQ