DRC-2009-004005 - 0901a06880140824

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MINIS-
Denison Mines (USA) Corp.
105017th Street, Sulla 6$0
Denver, CO 80266
USA
Tal :-303"«28-77fl8
Fax: [phone]
www.denl8onmlnes.com
Facsimile Transmittal
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Company: ^ t^ V^ Q. Date: 9-/- d ?
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White Mesa Uranium Mill
DMT Performance Standard Monitoring Report
StateofUtah
i§ SEP 2nQ9 • ^;
Ch-oundwaler Discharge Permit No. UGW370004 V^. P.'ftS ^'', ^'^ 2- Quarier vj:^'---o. C0...0/ ^^.^/
April through June \^... .CSV
-f ^,
2000 :::(u.Si.^i>
Prepared By:
Deni.son Mines (USA) Corp.
1050 i7ih Street, Suite 9.50
Denver. CO. 80265
September 1, 2009
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DMT PERFORMANCE STANDARD MONITORING REPORT
1.0 Mt^asurements Taken During the Quarter
During the Quarter, thc folluvving DMT Monitoring was performed nr adclrcsscd, as
required under Pan. T.E.6 of the Permit:
-Weekly tailings wastewater pool elevations for tailings (.Iclls 1,3 and 4A;
-Monthly slimes drain water levels;
-Weekly wastewater level measurements m Robcrt'.s Pond; atid
-Weekly feedstock storage area inspections.
2.0 Weekly Tailings Waste Water Pool Elevation Monitorins
Mill personnel monitored and recorded weekly the elevation of wastewater in Tailings Cells 1, 3
and 4A lo ensure compliance with the maximum wastewater elevation criteria mandated by
Condition 10.3 of the Mill's Radioaclive Materials License. These measurements were made
from an elevation survey. The results of such monitoring, reported as feet above me^Hu sea level
(frnsl), arc included in Attachment A,
Condition 10.3 ofthe Mill's Radioactive Materials License provides that freeboard limits for
Cells 1 and 3 shall be set in accordance with procedures thai have been approved by thc U.S.
Nuclear Regulatory Commission. Llnder those procedures:
(i) The freeboard limits are set as per thc January 10. 1990 Drainage Report for Cell
I at a liquid maximum elevation of .5,615.4 fmsl; and
(ii) The freeboard limit for Cell 3 is determined armually using a toimula scl out in
the procedure. The current freeboard liinit for Cell 3 was previously calculated
under this procedure at 5,601.6 fmsl. However, in UDEQ correspondence dated
November 20, 2008 an interim variance and liniii was established at 5,602.5 fmsl.
(iii) In conjunction with the variance established under (ii) above, an interim
maximum elevation for Cel 14A was also established at 5,593.74
In addition. Part LD.2 of the Permit provides that under no circumstances shall die freeboard of
any tailings cell bc less than three feel, a.s measured from the top of the flexible membrane liner
("FML"). The top of the FML in Cell 1 is at 5,618.5 fmsl and lhe top of the FML in Cell 3 is at
5,608.5 fmsl. This means thai the maximum wastewater pool elevations in Cells 1 and 3
permitted under Pan LD.2 of the Permit are 5,615.5 and 5,605.5 fmsl, respectively.
As indicated in lhe table below, thc wasle water pool elevations in Cells 1 and 3, as measured
during thc Quarter, did not exceed these regulatory .standards:
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Table J • Summary of Wa.«;te Water Pool Elevations
Tailinj^s
Cell
Cel
Cell 3
Cell 4A
Maximum
Wastewater E)leviition
Measured During the
Quarter (fm.sl)
5.612.23
5,600.68
5,590.14
Maximum
Wastewater Klevation
Permitted Under
Liccn.se Condition
10.3 (fmsl)
5615.4
5.602.5
Maximum
Wastewater
l^leyation Permitted
Under Part l.D.2 of
the Permit (fmsl)
5,615.5
5.605.5
5593.74
Note: Interim ma.ximum clevaiions of 5.602,5 fmsl and 5,593.74 fmsl for Cells 3 and 4A,
respectively have been established in correspondence from UDEQ dated November 20, 2008. Thc
maximum elevation of 5,593.74 fmsl for Cell 4A has been set assuming diat the total PMP volume
for Cells 2, 3 and 4A will be accommodated in Cell 4A. By letter dated December 11, 2008 Denison
applied for an amendment to ils Radioactive Materials License to set tlie freeboard limit for Cell 4A
al 5,593.74 fmsl and to eliminate the need to set a freeboard limit for Cell 3, given that the freeboard
limit of 5,593.74 fmsl for Cell 4A is .idcLjuate to accommodate the total PMP volume for CelLs 2. 3
and 4A,
3.0 Monthly Slimes Drain Waler Level Monitoring
Pursuant to Patt 1.F.2 of the Groundwater Discharge Permit and correspondence from the UDEQ
dated February 7, 2008, the rcsulls of monthly recovery monitoring of the slimes drain for Cell 2 are
to be recorded and included with the resulrs of cjuarlerly monitoring in the Quarterly Report. In
accordance with these requiremenis, the monthly readings and a graph showing the initial reading
and thc final reading for each monlh are included as Attachment B. These readings are to be
collected during a 90 hour recovery period aftei' the slimes drain pump has been turned off iri order to
delennine the static water level in die drain (head) after this short cessation in pumping.
In Part l.E.6.b) of tlie Permit this requirement shall apply to Cell 3 only upon initiation of tailings de-
watering operations. As Tailings Cell 3 is currently an active tailings cell and de-watering operations
have not commenced, no such measurements will be made in lhe slimes drain access pipe for Cell 3
in the foreseeable future.
4.0 Weekly Wasiewater Level Monitoring: Roberts Pond
Mill personnel monitored and recorded weekly, commencing on March 8, 2005, the effective date of
thc Permit, the wastewater levels at Roberts Pond to detemiine compliance with the DMT operations
standards in Pari LD.3. uf the Pennil. Fait I .D.3 of the Pennit provides that the water level in
Robcn's Pond shall not exceed an elevation of 5624 fmsl. Thc results of such monitoring, reported
as feet above mean sea level (fmsl),
3T.xb:36ed 0S3b9£ST0ST6:oi bSn S3NIW N0SIN3a:"Jo-i3 63= ST 600S-T0-d3S
The maximum wastewater elevation measured in Robcii's Pond during the quarter was 5620:56
fmsl which did not exceed the maximum permitted elevation of 5,624 fmsl.
5.0 Weekly Feedstock Storage Area Inspection
Weekly feedstock storage area inspections wcrc performed by the Radiation Safety Department,
coimncncing on March 8, 2005, the effective dale of the Pentiit, to confirm that the bulk
feedstock materials are stored and mainuiined within the defined area described in the Permit and
that all alternate feedstock localed outside the defined feedstock area arc maintained within water
light containers. The results of these inspections are recorded on thc Weekly Mill Inspection
Forms, which are available at the Mill for inspection. No variance in stored materials from this
requirement or leaking alternate feedstock drums or other alternate feedstock containers were
observed during the inspections.
6.0 Signature and Certification
This document was prepared by Denison Mines (USA) Corp. on September 1, 2009.
Denison Mines (USA) Corp.
By:
David C. Frydenlund -
Vice President, Regulatory affairs and Counsel
Certificarion:
T certify, under penalty of law, that this document and all attachments were prepared
under my direction or supervision in accordance widi a system designed to assure thai qualified
persomiel properly gather and evaluate the information submitted. Based cm my inquiry of the
person or persons who manage the system, or those persons directly responsible Ibr gathering the
information, the udbnnaiion 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 infomiation,
including the possibihty of fine and imprisonment or knowing violations.
Dappwl CTFrydcnlund
Vice President, Regulatory affairs and Counsel
Denison Mines (USA) Corp.
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Attachment A
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Tailings Pond Elevations
2nd Quarter Elevations
Date
Free Board
4/3/2009
4/10/2009
4/17/2009
4/24/2009
5/1/2009
5/8/2009
5/15/2009
5/22/2009
5/29/2009
6/5/2009
6/12/2009
6/19/2009
6/26/2009
CelM
5615.40
5612.2
5612.14
5612.23
5612
5611.86
5611.84
5611.67
5611.51
5611.48
5611.4
5611.27
5611.14
5611,05
Cells
5601.60
5600.58
5600.43
5600.51
560068
5600.4
5600.55
5600,47
5600.38
5600.45
5600.36
5600.34
5600.27
5600.1
Roberts Pond
5624.00
5618.07
5618.05
5618.23
5620.56
5618.66
561884
5618.34
5618.56
Dry
Dry
Dry
Dry
Dry
Cell 4A
5593.74
5588.4
5588.32
5588.44
5588.21
5588.24
5588.72
5588.77
5589.38
5590.02
5590.14
5590.11
5590.05
5589.86
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MONTHLY HEAD MEASUREMENT TEST
Location;
Slime
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
Comments
s Cell #2
4/20/2009 4/21/2009
16.79 15.44
16.73 15.4
16.65 15,37
16.6 15.31
16.58 15.27
16.51 15.74
16.4 15.18
T6.32 15.1
16.27 15.04
Date:
Sampler:
4/27./2009
14,43 14.41
14.39
14.35
14.32
14.28
14.22
14.17
14.14
: Start number was low because over
power was cut to the tailings area for some high voltag*
stopped th
4/27/2Q09
4/23/2009
72-
13.66
liJ.54
13.63
33.6
• 13.57
1.3.53
13.49
13,44
13.41
Ryan Palmer
4/24/2009
13.05
13.04
13.01
12.99
12.98
12.95
12.92
12.89
12.85
4/27
the weekend of april 18th and 19th
! repair work. This power outage
e pump from working on the slimes drain. When they turned the power back
/2009
11.98
11.98
1L9S
on the breaker was tripped leaving pump off until the ivionthly head test was started
Monday th
report num
e 20th of april. After completetion of test the pump was turned back on. The
ber is going to be 11.98.
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MONTHLY HEAD MEASUREMENT TEST
Location:
Slimes
600
700
. 800
900
1000
1100
1200
1300
1400
1500
1600
Comments:
Cell li 2
5^5/2009
11.28
11.28
11.28
11.27
11.27
11,24
11.23
11.22
11.19
5/16/2009
11.11
11.11
11.11
11.11
11.11
.11.11
11.11
11.08
11.06
Test was started mid week
Dale:
Sampler:
5/17/2009
11
11
10.99
10.97
10.97
10.95
10.95
10.94
10.91
5/20/2009
5/18/2009
10.74
10.74
10.74
10.74
10.72
10.7
10.68
10.66
10.63
Tanner Holliday
5/19/2009 .'5/20/2009
I'W
10.52 10.28
10.51 10,28
10.5 10.28
10.49
10.48
10.45
10.42
10.41
10.38
so repairs could be made to the slimes pump.
Environmental staff worked thorugh weekend on other projects, so they recorded the
slimes information as well.
.
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MONTHLY HEAD MEASUREMENT TEST
Location: Date; 6/22/2009
Slimes Cell # 2
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
Comments
the slimes
6/15/2009
25.16
25.52
24,77
24.05
23.59
Sampler:
6/16/2009 6/17/2009
^
19,39 16.75
19.2 1S.7
19.03 16.68
18.84 16.62
18.72 i^ 1G.56
18.55 16.49
18.41 16.41
18.25 16.34
18.05 15.24
Tanner Holliday
Ryan Palmer
G/18/20O9 6/19/2009 6/20/2009
15.46
l.S.aj
15.38
15.35
•il 15.29 ^t
15.;i6
15.2
15.15
15.1
14.62 13.62
14.61
14.58
14.55
14.52 i(UO
14.47
14.44
14.4
14.35
i During down time the gasket was replaced on the flange just outside
pipe. The report number will be 13.00
'
G/22/2009
13.00
13.00
1^^ 13.00
13.00
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Auachment B
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•Final Reading
-Intlial Reading
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