DRC-2010-006233 - 0901a068801e5e04

C-2010-006233
December 2, 2010
VIA E-MAIL AND OVERNIGHT DELIVERY
Rusty Lundberg
Utah Department of Environmental Quality
195 North 1950 West
P.O. Box 144810
Salt Lake City, UT 84114-4820
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y
Received
DEC 2010
Division of
Radiation Control
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Denison Mines (USA) Corp.
1050 17th Street, Suite 950
Denver, CO 80265
USA
Tel: [phone]
Fax : [phone]
www.denisonniines.com
Re: State of Utah Ground Water Discharge Permit ("GWDP") No. UGW370004
White Mesa Uranium Mill New Decontamination Pad Transmittal of Hydrostatic Leak Test Results
Dear Mr. Lundberg:
This letter transmits results of hydrostatic testing on the steel tank liner and leak detection system of the New
Decontamination Pad at Denison Mines (USA) Corp.'s ("Denison's) White Mesa Mill as required by Ground
Water Discharge Permit ("GWDP") No. UGW370004. This hydrostatic test and resulting data respond to:
• requirements in Part I.H.4.c) of the GWDP, and
• Utah Division of Radiation Control's ("DRCs) Request for Information ("RFI") letter of February
4,2010.
Denison provided 10 day notice of testing to DRC on September 2, 2010 and November 12, 2010. A
successful 48 hour test was conducted from November 24 to 26, 2010, and results, certified by a Utah
Registered Professional Engineer, are attached to this letter.
Please contact the undersigned if you have any questions or require any further information.
Yours very truly,
DENISON MINES (USA) CORP.
Jo Ann Tischier
Director, Compliance and Permitting
cc: David C. Frydenlund
Harold R. Roberts
David E. Turk
K. Weinel
Central files
DENISO
MINES
Dvnlson Mbtaa Corp.
6426 S. Highway 191, PO Box 809
Blanding, UT 84511
USA
Tel: [phone]
Fax: [phone]
www.clenl8onniliio».oom
TESTING PROCEDURE - LEAK CHECK NEW DECON COLLECTION TANK LINER
The following is the procedure to ensure that the steel tank liner that has been installed in the collection tank
does not have any leaks prior to entering into servrce. The collection tank has three bays with an inspection
port in the comer of each bay. These ports are covered by a pipe cap. It is critical that these caps be left in
place at all times except at time of inspection and measurement. Prior to testing it has been confirmed that
there is no water inside these inspection ports. Prior to starting testing this water must be removed to all
reasonable extent. The test period shall be 48 hours. The following procedure shall be completed and dates,
times, and signatures filled in. The completed form shall be retumed to Steve Snyder.
1.
2.
Verify that each bay has had the residual water removed. Initial
Establish Baseline - Measure any water level in each bay and record along with the Date and Time of
Measurement.
a. Bay 1 (South Bay)
b. Bay2 (Middle Bay)
c. Bay 3 (North Bay)
Water Level.
Water Level
9-(^3
Water Level. Ay. 7^
Date /plH7w Time.
Date If/zyiO Time 3-OS qno
, Date /f/T-'p/O Time 'f--00
Initial
2^ Measurement (24 hrs) - Measure water level in each bay and record along with the Date and Time
of Measurement.
a. Bay 1 (South Bay)
b. Bay2(MiddleBay)
c. Bay 3 ( North Bay)
Water Level.
Water Level.
Water LeveL
jy
jyy
Date \l/z^//(^
Date 117^'^
Time
Time
Time
if:l}0
^1 Od
J2il
Initial
4. Final Measurement (48 hrs) - Measure water level in each bay and record along with the Date and
Time of MeasuremenL
a. Bay 1 (South Bay)
b. Bay 2 (Middle Bay)
c. Bay 3 ( North Bay)
Water Level.
Water Level.
Water Level.
. Date.
Date.
Date \l/'ZiyiO
Time
. Time
Time
j^y/Ajiir
Initial
A passing test will show no measurable increase in water leveL A failed test shall result in leak repair and
retesting.
Pass or Fail _ Signature