DRC-2025-000380

299 South Main Street, Suite 1700 ▪ Salt Lake City, Utah 84111
[phone] ▪ Fax: [phone] ▪ www.energysolutions.com
January 31, 2025 CD-2025-018
Mr. Doug Hansen, Director
Division of Waste Management and Radiation Control
P.O. Box 144880
Salt Lake City, UT 84114-4880
Re: Groundwater Quality Discharge Permit Number UGW450005 (GWQDP) –
Depleted Uranium Storage Building Roof Replacement Completion
Dear Mr. Hansen:
EnergySolutions hereby provides a resolution to Best Available Technology (BAT), as
required by Section 4.19 of Appendix J to the GWQDP, non-conformance with the
leaking Depleted Uranium (DU) Storage Building Roof, as presented on April 3,2024
(via CD-2024-069) and September 3, 2024 (via CD-2024-183). A summary of the
corrective actions is reported below.
Sheets of plastic were first draped over the drums as a barrier between infiltrating rainfall
and DU waste in storage. All roof panel screws (believed to be the locations of
precipitation leakage) were inspected individually. Loose screws were tightened, and
those that could not be tightened were replaced with larger screws or rivets. Sealant was
also applied to any identified gaps. Vertical weather stripping and bottom seals on the
garage doors were replaced. Faulty rollers on the garage doors were also replaced to
ensure better contact with the vertical seals. Despite these repairs and repeated similar
attempts, BAT inspectors continued to report stormwater in the building.
To address those leaks, a more robust repair was undertaken to install a membrane over
the entire building roof, eliminating the possibility of moving panels, failed seams, wind
or pressure differentials allowing water into the building. The repair began November 6,
2024 and included cleaning and preparing the existing roof for the in-filling of roofing
ridges with insulating foam, to achieve a flat surface. Followed by a 60-mil membrane
overlay heat welded together into a single piece cover. The work was completed mid-
January, and the final inspection was done the week of January 20, 2025 to verify the
quality of the work, and the seal of the membrane.
EnergySolutions is confident this roof replacement is a long-term fix and an immediate
improvement to the formerly ongoing leakage problems facing the building’s roof.
However, confirmation of the repairs effectiveness will not be confirmable until it has
been exposed to subsequent storm events.
Mr. Doug Hansen
January 31, 2025
CD-2025-018
Page 2 of 2
Please contact me at [phone] with any questions regarding this notification.
Sincerely,
Mathew R Schon
Manager, Groundwater and Environmental Program
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance
with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry
of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information
submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fine and imprisonment for knowing violations.