DRC-2023-072068 - 0901a06881274b99

�£RGYFUELS
September 7, 2023
Sent VIA E-MAIL AND EXPEDITED DELIVERY
Mr. Doug Hansen Director Division of Waste Management and Radiation Control Utah Department of Environmental Quality 195 North 1950 West Salt Lake City, UT 84116
Energy Fuels Resources (USA) Inc. 225 Union Blvd. Suite 600 Lakewood, CO, US, 80228 303 974 2140 www .energyfuels.com a
Re: White Mesa Uranium Mill-Notice Pursuant to Energy Fuels Resources (USA) Inc. Standard Operating Procedure ("SOP"), Section 5.0 of the Environmental Protection Manual ("EPM"), Settlement Monitoring
Dear Mr. Hansen:
Pursuant to the White Mesa Mill's (the "Mill's") Environmental Protection Manual ("EPM"),
Settlement Monitoring Standard Operating Procedure ("SOP"), Section 5.0, Revision DUSA-2, Energy Fuels Resources (USA) Inc. ("EFRI"), as operator of the Mill, is providing written notice to the Division of Waste Management and Radiation Control ("DWMRC") of a difference of 0.1
foot or greater between two consecutive monthly settlement monitor measurements in six of the 41 monitors, as described in more detail below.
Section 1.6 of the Mill's Settlement Monitoring SOP states that when the monthly data has been
collected, the information will be reviewed for any errors and/or major changes in the vertical
movement on the settlement monitors. If there is a difference of 0.1 foot between two
consecutive months, then an investigation and possible corrective actions will be taken as
follows:
1.Resurvey the settlement monitor that shows vertical movement of 0.1 foot or more, within 7
days of discovery of the problem.
2.Document site conditions.3.Prepare a document to the Corporate Compliance Director stating possible causes (i.e.expected settlement of the tailings sands, man-caused contact, environmental stresses,burrowing animals, etc.).4.Report this information to the Executive Secretary within 30 calendar days for approval andinclude in that notification the investigation steps, movement evaluation, and correctiveactions taken, if needed. This report will also be maintained within the EnvironmentalDepartment records and will be submitted annually as part of the ATER as required by RMLCondition 12.2.
DRC-2023-072068
Letter To Doug Hansen September 7, 2023 Page 3 of 3
If you should have any questions regarding this notice, please contact me.
Yours very truly,
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ENERGY FUELS RESOURCES (USA} INC.Kathy W einel Director, Regulatory Compliance
CC: David Frydenlund Logan Shumway Scott Bakken
Garrin Palmer Tanner Holliday Jordan App