DRC-2025-002511

State of Utah
SPENCER J. COX
Governor
DEIDRE HENDERSON
Lieutenant Governor
Department of EnvironmentalQuality
Tim Davis
Executive Director
DIVISION OF WASTE MANAGEMENT AND RADIATION CONTROL
Douglas J. Hansen
Director
August 7, 2025
Vern C. Rogers, Director of Regulatory Affairs
EnergySolutions, LLC
299 South Main Street, Suite 1700
Salt Lake City, UT 84111Subject:Stipulation andConsent Order for Closure of the Class A West (CAW)Embankment - Request for InformationGroundwater Quality DischargePermitNo UGW450005
Dear Mr. Rogers:
Thank you for your letter of May 7, 2025, that discusses the history of the Open-Cell-Time Limit found in Part I.E.6 of the Ground Water Quality Discharge Permit (Permit) and the Cover
Test Cell’s impact on Class A West embankment cover construction.
As you are aware, the Permit does allow modification of the 18-year time limitation; the Permit requires that a plan, schedule, and justification be provided to obtain director approval
of a modification of the Open Cell Time Limitation. As part of the justification forthemodification of the open-cell time limit the Division of Waste Management and Radiation Control
(Division)needs to know when EnergySolutionsnotified David Esser, formerly of the Division, that they would not meet the Open Cell Time Limitation. Additionally, could you provide dates
and times of meeting between EnergySolutions, the Division, and David Esser to discussthe exceedance of the Open Cell Time Limitation and the context of those meetings.In an April 1,
2024 letter, EnergySolutions provided an approximate timeline for the construction of final cover of the Class A West embankment. The Division would like a more formal schedule with
a better-defined timeline for the closure of the Class A West embankment. The division intends to use a Stipulation and Consent order for the closure ofthe Class A West Embankment, replacing
the 18-year time limit for the Class A West embankment. Any information that EnergySolutions thinks should be included in aStipulation and Consent ordershould be included with the response
to this letter.
If you have any questions, please call Charles Bishops at [phone]
Sincerely,
Douglas J. Hansen, Director
Division of Waste Management and Radiation Control
DJH/CB/jkc:Jeff Coombs, Health Officer, Tooele County HealthDepartment
Bryan Slade, Environmental Health Director, Tooele County Health Department EnergySolutionsGeneral Correspondence Email
LLRW General Correspondence Email