DRC-2018-005523 - 0901a0688083cc22

Div of Waste Management
and Radiation Control
JUN - 5 2018
ENERGYSOLUTIONS
June 5, 2018 CD18-0103
Mr. Scott T. Anderson, 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):
Well P3-95 SWC Storm Water Management Temporary Variance — Extension
Request
Dear Mr. Anderson:
The third revised Corrective Action Plan (CAP) submitted August 10, 2016 (CD16-
0168), proposed a temporary variance to the storm water management prioritization listed
in GWQDP Appendix J, Part 4.21. EnergySolutions proposed to change the management
priority of surface water in the north-south ditch near monitoring well P3-95 SWC from
Priority 3 to Priority 1 for an 18-month duration beginning on the date of Division of Waste
Management and Radiation Control (DWMRC) approval. DWMRC approved the temporary
variance on December 14, 2016, and since that time, EnergySolutions has managed storm
water in the ditch as Priority 1. The temporary variance is scheduled to expire on June
14, 2018, and this submittal requests an extension of the variance until December 31,
2019.
As discussed in the third revised CAP, infiltration of surface water from the north-south
ditch may transport residual contamination to well P3-95 SWC, and designating
management of this water as Priority 1 will reduce or eliminate this infiltration. Without
the assistance of groundwater extraction which was completed in March 2017, well
P3-95 SWC uranium concentrations have remained less than groundwater protection
levels (GWPLs) for 12 consecutive months (May 2017 through April 2018). This
information suggests that prompt removal of surface water near well P3-95 SWC will
eliminate non-compliant groundwater uranium concentrations. Extension of the
temporary storm water management variance will provide additional confirmation of the
relationship between infiltration and groundwater quality at well P3-95 SWC.
299 South Main Street, Suite 1700 • Salt Lake City, Utah 84111
[phone] • Fax: [phone] • www.energysolutions.com
ENERGYSOLUTIONS
Mr. Scott Anderson
June 5, 2018
CD18-0103
Page 2 of 2
EnergySolutions requests approval of the temporary variance extension by June 14, 2018.
Please contact me at 801-303-0187 with any questions regarding this request.
Sincerely,
Robert W. Sobocinski
Groundwater Program Manager
Enclosures
cc: Charles Bishop, DWMRC
Don Verbica, DWMRC
I certift under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance
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