DRC-2011-007863 - 0901a068802b1559

State of Utah
GARYR HERBERT
Governor
GREG BELL
Lieutenant Governot
Department of
Environmental Quahty
Amanda Smith
Executive Director
DIVISION OF RADIATION CONTROL
Rusty Lundberg
Director
SR
August 15 2011
CERTIFIED MAIL
RETURNED RECEIPT REOUESTED
Mr David C Frydenlund
Vice President Regulatory Affairs and Counsel
Denison Mines (USA) Corp (DUSA)
Independence Plaza Suite 950
1050 Seventeenth Street
Denver CO 80265
RC-2011-007863
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RE 8/15/11 chlorofrom conditional apprval / DH
David 0 Frydenlund
Vice President & General Counsel
Denison Mines (USA) Corp (DUSA)
1050 17th ST STE 950
Denver CO 80265
PS F»rm 3»»0, August 2$ti Sec Reverse (•r Instmctions
SUBJECT Chloroform Contamination Investigation Notice of Violation and Groundwater Corrective Action
Order Docket No UGW20 01 DUSA Submittal of a Plan and Work Schedule to Drill and Install
Well TW4 27 Conditional Approval Letter
Dear Mr Frydenlund
The Division of Radiation Control (hereafter DRC ) has reviewed the June 17 2011 Plan of and Work Schedule
(hereafter Plan ) to drill and install chloroform well TW4 27 The submitted Plan is in response to a May 26 2011
Request for Additional Information Letter for a plan of action and work schedule regarding installation of a well(s)
hydraulically down gradient of wells TW4 4 and TW4 6
Based on our review the Plan is conditionally approved with the following modificauon to Plan item 2(c) ladded
wording in italics and underlined deleted wording is struck out]
2(c) Ifthe Executive Secretary determines it is determined that the criteria specified in paragraph 1 2 above
have not been satisfied with the addiUon of TW4 27 then Denison will submit within 30 calendar days of
written notice to the Executive Secretary after submittal of the Quarterly Chloroform Monitoring Report
that contains the second of the two quarters of data referred to above a plan and schedule for installaUon of
one or more additional chloroform monitoring wells The new well(s) must show that the 70 ^sA
chloroform isoconcentration line remains hydraulically up gradient to the new well(s) and the groundwater
contour lines must show the new well(s) are hydraulically down gradient to TW4 4 andTW4 6
If you disagree with the above modificaUon please contact Dean Henderson at 801 536 0046 withm three working
days of receipt of this letter Thank you for your cooperation
UTAH WATER QUALITY BOARD
Rusty Lundberg
Co Executive Secretary
RL/DCH
195 North 1950 West Salt Lake City UT
Mailing Address PO Box 144850 SaltLakeCity UT 84114 4850
Telephone [phone] Fax [phone] TDD [phone]
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