DRC-2025-001463

May 6, 2025
Matthew R. Schon
Groundwater and Environmental Program Manager
EnergySolutions, LLC
299 South Main Street, Suite 1700
Salt Lake City, UT 84111
RE:ExtensionRequest Groundwater Monitoring Well P3-95 SWC Tracer Dye Test Plan Variance
Ground Water Quality Discharge Permit No. UGW450005
Dear Mr. Schon:
On April 23, 2025, the Division of Waste Management and Radiation Control (Division) received a variance request to extend the deadline to begin thetracer dye test at Compliance Well
P3-95 SWCfrom April 25, 2025, as per the October 9, 2023 Revised Corrective Action Plan (CAP) to address the presence of uranium in groundwater at the Clive Facility Compliance Groundwater
Monitoring well P3-95 SWC(DRC-2023-071888, DRC-2025-001372).
After review, EnergySolutions’request for a variance tothe October 9, 2023CAP for Groundwater Compliance Well P3-95 SWCand subsequent Monitoring Well P3-95 SWC Tracer Dye Test Plan (DRC-2025-000667)
is hereby approved. Seasonably higher precipitation leading to stormwateraccumulation in the ditch west of the P3-95 SWC has been correlated with elevateduranium levels occurring in
groundwater, and the Division agrees that, due to a very dry spring, the conditions required to conduct the tracer dye study have been inadequate. As outlined in the Monitoring Well
P3-95 SWC Tracer Dye Test Plan, EnergySolutions intends to conduct this test when there is a precipitation event largeenough to fill the jettied ditchesduring a seasonably wet period,
such as the fall or spring, whichhas historically been the time Total Uranium has exceeded allowable Ground Water Protection Levels.
The Division agrees to a one-year extensionto begin the tracer dye study,from April 25, 2025 to April 25, 2026, to allow for the flexibility to conduct the tracer dye study when optimal
conditions arise.
If you have any questions regarding this letter, please contact Bailey Anderson by email at [e-mail] or by phone at 385-460-6130.
Sincerely,
Douglas J. Hansen, Director
Division of Waste Management and Radiation Control
DJH/BMA/[???]
c:Taylor Palmer, Tooele County Health Department
Wade Tolbert, Tooele County Health Department
Tooele County Health Department, Environmental Health Email
EnergySolutions General Correspondence Email
LLRW General Correspondence Email
Matthew R. Schon,Groundwater and Environmental Program Manager,
EnergySolutions, LLC (Email) [e-mail]
Nick Clarke, Compliance Specialist, EnergySolutions, LLC (Email)[e-mail]