DRC-2010-005044 - 0901a068801c3621

DRC-2010-005044 Page 1 of 2
Phillip Goble - RE: Cell 1 Leak Discussion Meeting
From: Jo Ann Tischler <jtischler(@denisonmines.com>
To: Phillip Goble <pgoble(@utah.gov>
Date: 9/14/2010 9:28 AM
Subject: RE: Cell 1 Leak Discussion Meeting
CC: Harold Roberts <HRoberts(^denisonmines.com>, David Frydenlund
<DFrydenlund(@denisonmines.com>
Attachments: Revised Table 1 for June and August 2010.pdf
Phil
That will work. We will call Loren's office.
I have also attached an updated version of Table 1 from both the June and August leak detection system level
measurements, with footnotes clarifying the meaning of the raw data.
Jo Ann Tischler
Jo Ann Tischler
Director, Compliance and Permitting
t: (303) 389^132 | f: [phone]
1050 17th Street, Suite 950, Denver, CO 80265
DENISON MINES (USA) CORP
www.denisonmines.corri
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From: Phillip Goble [mailto:pgoble(autah.gov]
Sent: Tuesday, September 14, 2010 7:32 AM
To: Jo Ann Tischler
Cc: Loren Morton
Subject: RE: Cell 1 Leak Discussion Meeting
Alright, how does Tomorrow (Wednesday) at 1:00 work for you. Please call in to Loren's office.
Phil
>>> Jo Ann Tischler <jtischler(g)denisonmines.com> 9/13/2010 2:56 PM >>>
Harold is out of town Thursday through Monday September 16 through 20. We can do today, tomorrow
afternoon or Wednesday anytime, or next Monday or Tuesday.
Thanks,
Jo Ann Tischler
Jo Ann Tischler
Director, Compliance and Ponvitlinq
t: [phone] | f: [phone] DENISON MINES (USA) CORP
file://C:\Documents and Settings\Pgoble\Local Settings\Temp\XPgrpwise\4C8F402FEQD.,. 9/16/2010
Page 2 of 2
1050 17th Street, Suite 950, Denver, CO 80265 www.denisonmines.com
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contain privileged or proprietary information. If you are not the intended recipient(s) please delete this message and notify the sender. You may not use, distribute
print or copy this message if you are not the intended recipient(s).
From: Phillip Goble [mailto:[e-mail]]
Sent: Monday, September 13, 2010 12:53 PM
To: Jo Ann Tischler
Cc: Loren Morton
Subject: Cell 1 Leak Discussion Meeting
Jo Ann,
I checked with Loren, the best time for us to meet to discuss the Cell 1 Leak Repair Plan is Thursday September
16 at 9:00 a.m., please call Loren's office. Please let me know if that date and time will work for you.
Phil
file://C:\Documents and Settings\Pgoble\Lpcal Settings\Temp\XPgrpwise\4C8F402FEQD... 9/16/2010
TABLE 1
Estimation of Cell 1 Leakage Rate
From June 2010 Date of Fluid Detection
Until Leak Detection System Achieved Dryness
Date Time Conditions at
Time of Level
Measurement
Approximate
Depth to Liquid
Level
Height of Liquid
Column (feet)
Calculated
Leakage rate
(gpm)
06/2/2010 14:50 During routine
inspection
55 feet 10
inches
7.5
6/3/2010 08:25 Before pumping
standpipe
55 feet 6 inches 7.83
\ • .: 6/3/2010 08:42 After pumping
standpipe
63 feet 4 inches
(dry)^
0
6/3/2010 09:30 Before pumping
standpipe
61.feet 9 inches 1.58
6/3/2010 09:33 After pumping
standpipe
63 feet 4 inches
(dry)
0 0.48
6/3/2010 14:05 Before pumping
standpipe
58 Feet 8
inches
4.67
6/3/2010 14:10 After pumping
standpipe
63 feet 4 inches
(dry)
0 0.17
6/4//2010 07:50 Before pumping
standpipe
57 feet 0 inches 6.33
6/4//2010 07:59 After pumping
standpipe
63 feet 4 inches
(dry)
0 0.05
6/4//2010 14:11 Before pumping
standpipe
57 feet 5 inches 5.92
6/4//2010 14:17 After pumping
standpipe
63 feet 4 inches
(dry)
0 0.14
6/7/2010 10:25 Before pumping
standpipe
56 feet 6 inches 6.83
6/7/2010 10:31 After pumping
standpipe
63 feet 4 inches
(dry)
0
^ Value of 63 feet 4 inches indicates length of standpipe/blow tube before extensions were added in August 2010.
TABLE 1
Estimation of Cell 1 Leakage Rate
From date of August Fluid Detection
Until Leak Detection System Achieved Dryness
Date Time Conditions at
Time of Level
Measurement
Approximate
Depth to Liquid
Level
Height of
Liquid Column
(feet)
Calculated
Leakage rate
(gpm)
8/7/2010 21:30 During routine
inspection
61 feet 8 inches'" 1.70
8/8/2010 13:55 Before pumping
standpipe
60 feet 8 inches 2.83 0.01
8/9/2010 09:00 Before pumping
standpipe
60 feet 2 inches
(dry)
3.3 0.02
8/10/2010 14:24 Before pumping
standpipe
Unable to read
while PVC
cement was
setting^,^
0.02
8/11/2010 13:15 Before pumping
standpipe
63 feet 9 inches
(dry)
5.75 0.01
8/12/2010 15:00 Before pumping
standpipe
64 Feet 2 inches 5.33 0.02
8/13/2010 10:40 Before pumping
standpipe
65 feet 0 inches
(dry)
4.5 0.02
8/14//2010 14:20 Before pumping
standpipe
66 feet 2 inches 3.33 0.01
8/15//2010 16:15 Before pumping
standpipe
66 feet 4 inches
(dry)
3.17 0.01
8/16//2010 14:50 Before pumping
standpipe
67 feet 5 inches 2.08 0.01
8/17//2010 13:45 Before pumping
standpipe
68 feet 5 inches 1.08 0.002
8/18/2010 14:30 Before pumping
standpipe
No liquid present;
no pumping
required
io;;
8/19/2010 14:45 Before pumping
standpipe
No liquid present;
no pumping
required
0 . .
• By this date, the environmental staff had added a 2-inch extension to the end of the blow pipe. The pipe length was
now 63 feet 6 inches.
^ Based on requests by Dave Rupp and Dean Henderson the LDA standpipe was extended by six (6) feet on August
10,2010
^ There were no obstructions to the standpipe or blow tube. The PVC cement for the pipe extension had not dried at
the time ofthe level measurement. To prevent disturbance ofthe cement before it was properly set, the
measurement was deferred to the next day.