DRC-2012-001537 - 0901a068802de885

DRC-2012-001537
DENISO
MINES
Denison Mines (USA) Corp.
1050 17th Street, Suite 950
Denver, CO 80265
USA
Tel: [phone]
Fax [phone]^125
www.denisonmines com
May 30, 2012
Sent VIA Federal Express
Mr. Rusty Lundberg
Co-Executive Secretary
Utah Water Quality Board
Utah Department ofEnvironmental Quality
195 North 1950 West
P.O. Box 144810
Salt Lake City, UT 84114-4820
Re: Transmittal of DMT Performance Standards Monitoring Report and Cell 4A BAT
Performance Standards Monitoring Report for the Quarter of 2012
Dear Mr. Lundberg:
Enclosed please find two copies of the DMT Performance Standards Monitoring Report and Cell
4A BAT Performance Standards Monitoring Report for the 1st Quarter of 2012, as required
under Parts I.F.2 and I.F.3 of the White Mesa Mill's State of Utah Groundwater Discharge
Permit No. UGW370004, Also enclosed are two CDs, each with an electronic word-searchable
copy of the enclosed Report.
If you have any questions regarding this Report, please contact the undersigned at (303) 389-
4132 or Mr. David Turk at [phone].
Yours very truly.
DENISON MINES (USA) CORP.
Jo Ann Tischler
Director, Compliance and Permitting
cc David C. Frydenlund
Ron F. Hochstein
Harold R. Roberts
David E. Turk
Kathy Weinel
I -
I
OENISOJ)~~
MINES
. May 30, 2012
Sent VIA Federal Express
Mr. Rusty Lundberg
Co-Executive Secretary
Utah Water Quality Board
Utah Department of Environmental Quality
195 North 1950 West
P.O. Box 144810
Salt Lake City, UT 84114-4820
Denison Mines (USA) Corp.
1050 17th Street, Suite 950
Denver, CO 80265
USA
Tel: [phone]
Fax: [phone]
www.denisonmines.com
Re: Transmittal of DMT Performance Standards Monitoring Report and Cell 4A BAT
Performance Standards Monitoring Report for the 1st Quarter of 2012
Qear Mr. Lundberg:
Enclosed please find two copies of the DMT Performance Standards Monitoring Report and Cell
4A BAT Performance Standards Monitoring Report for the 1st Quarter of 20)2, as required
under Parts LF.2 and LF.3 of the White Mesa Mill's State of Utah Groundwater Discharge
. Permit No. UGW370004. Also enclosed are two CDs, each with an electronic word-searchable
copy of the enclosed Report.
If you have any questions regarding this Report, please contact the undersigned at (303) 389-
4132 or Mr. David Turk at [phone]. '
Yours very truly,
~~
DENISON MINES (USA) CORP.
JoAnn Tischler
Director, Compliance and Permitting
cc David C. Frydenlund
Ron F. Hochstein
Harold R. Roberts
David E. Turk
Kathy Weinel
('
WHITE MESA URANIUM MILL
DMT PERFORMANCE STANDARDS MONITORING REPORT AND CELL 4A AND
CELL 4B BAT PERFORMANCE STANDARDS MONITORING REPORT
1st Quarter
January through March
2012
State of Utah
Groundwater Discharge Permit No. UGW370004
Prepared By:
Denison Mines (USA) Corp .
. 1050 17th Street, Suite 950
Denver, CO. 80265
May 30,2012
TABLE OF CONTENTS
1.0 INTRODUCTION ........................................................................................................................................ 1
2.0 MEASUREMENTS TAKEN AND MONITORING PERFORMED DURING THE QUARTER ....... 1
3.0 WEEKLY TAILINGS WASTEWATER POOL ELEVATION MONITORING .................................. 2
4.0 QUARTERLY SLIMES DRAIN WATER LEVEL MONITORING ...................................................... 3
4.1 GENERAL ..................................................................................................................................................... 3
4.2 RESULTS FOR THE QUARTER ........................................................................................................................ 5
4.3 QUALITY ASSURANCE EVALUATION AND DATA VALIDATION ..................................................................... 5
4.4 GRAPHIC COMPARISON TO PREVIOUS YEAR ................................................................................................ 5
5.0 WEEKLY WASTEWATER LEVEL MONITORING: ROBERTS POND ........................................... 5
6.0 WEEKLY FEEDSTOCK STORAGE AREA INSPECTIONS AND INSPECTIONS OF
FEEDSTOCK MATERIAL STORED OUTSIDE THE FEEDSTOCK STORAGE AREA ................. 5
7.0 TAILINGS CELLS AND POND LINER SYSTEM REPAIRS ............................................................... 6
8.0 DECONTAMINATION PADS ................................................................................................................... 7
8.1 SUMMARY OF WEEKLY INSPECTIONS ........................................................................................................... 7
8.2 ANNUAL INSPECTION OF EXISTING DECONTAMINATION PAD ...................................................................... 8
8.3 ANNUAL INSPECTION OF NEW DECONTAMINATION PAD ............................................................................. 8
9.0 CELL 4A AND CELL 4B BAT PERFORMANCE STANDARDS REPORT FOR THE QUARTER 9
9.1 LDS MONITORING ....................................................................................................................................... 9
9.1.1 Operational Status of LDS Pumping and Monitoring Equipment ........................................................... 9
9.1.2 Measurement of Weekly Fluid Head at the Lowest Point in the Secondary FML. ................................. 10
9.1.3 Measurement of the Volume of Flu ids Pumpedfrom the LDS ............................................................... 10
-9.2 MEASUREMENT OF WEEKLY WASTEWATER FLUIDS IN CELLS 4A AND 4 B ................................................. 11
9.3 SLIMES DRAIN RECOVERY HEAD MONITORING .......................................................................................... 11
10.0 CELL 1 AND CELL 3 LDS MONITORING FOR THE QUARTER .......................................................... 11
10.1 OPERATIONAL STATUS OF LDS PUMPING AND MONITORING EQUIPMENT .................................................. 12
10.2 MEASUREMENT OF THE VOLUME OF FLUIDS PUMPED FROM THE LDS ........................................................ 12
10.3 MEASUREMENT OF WEEKLY WASTEWATER FLUIDS IN CELLS 1, AND 3 ..................................................... 12
10.4 SLIMES DRAIN RECOVERY HEAD MONITORING .......................................................................................... 12
11.0 ANNUAL SLIMES DRAIN RECOVERY HEAD REPORT FOR THE CALENDAR YEAR 2011. .. 12
12.0 SIGNATURE AND CERTIFICATION .................................................................................................... 13
1
LIST OF TABLES
Table 1 -Summary of Waste Water Pool Elevations
Table 2 -New Decontamination Pad Inspection Portal Level
ATTACHMENTS
A Tailings Cell and Roberts Pond Wastewater Elevations
B Notices Pursuant to Part I.G.3 of the GWDP
C Monthly Cell 2 Slimes Drain Monitoring Data
D Graph of Cell 2 Slimes Drain Water Levels Over Time
E Cell Liner Repair Reports and Notices
F Cell4A and Cell4B Leak Detection System Data for the Quarter and BAT O&M Plan
Tables lA and IB, Cell4A and 4B Calculations
G Annual Inspection Forms for Existing and New Decontamination Pads (Part I.F.12)
11
WHITE MESA URANIUM MILL
DMT PERFORMANCE STANDARDS MONITORING REPORT AND CELL 4A AND
CELL 4B BAT PERFORMANCE STANDARDS MONITORING REPORTS
FOR THE 1st QUARTER OF 2012
1.0 INTRODUCTION
This is the routine Discharge Minimization Technology ("DMT") Performance Standards
Monitoring Report for the 1st quarter of2012 (the "Quarter") prepared by Denison Mines (USA)
Corp. ("Denison"), as required under Part LF.2 of the White Mesa Mill's (the "Mill's") State of
Utah Groundwater Discharge Permit No. UGW370004 (the "GWDP"), and the Routine Cell 4A
and Cell 4B Best Available Technology ("BAT") Performance Standards Monitoring Reports for
the Quarter, as required under Part LF.3 of the GWDP.
2.0 MEASUREMENTS TAKEN AND MONITORING PERFORMED DURING THE
QUARTER
During the Quarter, the following DMT monitoring was performed or addressed, as required
under Part LD.3, LE.7, and LF.11 of the GWDP:
• Weekly tailings wastewater pool elevations for tailings Cells 1 and 3 (Part
LE.7(a));
• Quarterly slimes drain water levels in Cell 2 (Part LD.3(b)(1) and (2));
• Annual Slimes Drain Compliance (Part LD.3 (b) and LF.11);
• Weekly wastewater level measurements in Roberts Pond (Part LD.3(e) and Part
LE.7(c));
• Weekly feedstock storage area inspections and inspections of feedstock materials
stored outside of the feedstock storage area (Part LD.3(f) and Parts LE.7(d); and
(e));
• Any tailings cell and pond liner system repairs (Part LE.7 (f) and Part LE.(8)(c));
• Weekly New Decontamination Pad Inspection (Part LE.7 (g)) and
• Annual Decontamination Pad Concrete Inspection (Part LF.11) (not required this
reporting period)
Also during the Quarter, the following Cell 4A and 4B BAT performance standards monitoring
was performed, or addressed, as applicable and as required by Parts LE.8 and LE.12 of the
GWDP:
• Leak detection system ("LDS") monitoring for Cell 4A (Part LE.8.(a)), and Cell
4B (Part LE.12 (a)); and
• Weekly tailings wastewater pool elevations for tailings Cell 4A (Part LE.8 (a))
and Cell4B (Part LE.12 (a)).
1
3.0 WEEKLY TAILINGS WASTEWATER POOL ELEVATION MONITORING
Mill personnel monitored and recorded weekly the elevation of wastewater in the Mill's tailings
cells during the first quarter 2012, to ensure compliance with the maximum wastewater elevation
criteria mandated by Parts I.E.7(a), I.E.8(a) and I.E.12(a) of the GWDP. The results of such
monitoring, reported as feet above mean sea level ("finsl"), are included in Attachment A. Part
I.D.2 of the GWDP provides that under no circumstances shall the freeboard of any tailings cell
be less than three feet, as measured from the top of the flexible membrane liner ("FML"). The
top of the FML in Cell 1 is at 5,618.5 finsl, and the top of the FML in Ce1l4B is 5600.4 finsl.
This means that the maximum wastewater pool elevations in Cells 1 and 4B permitted under Part
I.D.2 of the GWDP are 5,615.5, and 5597.4 finsl, respectively.
The maximum wastewater pool elevations in Cells 1 and 4B, as measured during the Quarter, are
summarized in the following Table 1. The requirement to meet freeboard elevation limits in Cell
3 and Cell 4A was eliminated as documented on March 14 and 15, 2011 respectively. As
indicated in Table 1, the applicable freeboard limits were not exceeded during the Quarter for
any cell.
All cells also met the maximum wastewater criteria of the Mill's State of Utah Radioactive
Materials License No. UT 1900479 (the "License") throughout the period. However, the
requirements to maintain a minimum freeboard in Cell 3 and Cell 4A were removed by the
Executive Secretary of the State of Utah Radiation Control Board (the "Executive Secretary")
during the first quarter 2011 as detailed below.
Condition 10.3 of the License provides that the freeboard limit for Cell 1 shall be set in
accordance with procedures that have been approved by the U.S. Nuclear Regulatory
Commission ("NRC"). Under those procedures the freeboard limit for Cell 1 is set as per the
January 10,1990 Drainage Report for CellI at a liquid maximum elevation of5,615.4 finsl.
Condition 10.3 of the License also provides that the freeboard limit for Cells 3, 4A and 4B shall
be recalculated annually in accordance with the procedures approved by the Executive Secretary.
A letter from the Executive Secretary dated January 27, 2011 which approved the use of Ce1l4B
and a subsequent letter dated March 14,2011, sta(ed that authorization of the use ofCe1l4B and
approval of the DMT and Cell 4A Operations and Maintenance ("O&M") Plans effectively
eliminated the former freeboard elevation requirements for tailings Cell 3. The approvals of the
DMT and Cell 4A O&M Plans also resolved previous freeboard exceedance issues and further
stated that former issues regarding the freeboard exceedances for Cell 3 are closed-out. Pursuant
to the receipt of the March 14, 2011 letter, freeboard elevation survey measurements in Cell 3
were no longer required or conducted.
A letter from the Executive Secretary dated January 27, 2011 which approved the use of Ce1l4B
and a subsequent letter dated March 15, 2011, stated approval of the DMT and Cell 4A and Cell
4B Operations and Maintenance ("O&M") Plans effectively eliminated the former freeboard
elevation requirements for tailings Cell 4A. The approvals of the DMT and Cell 4A and 4B
O&M Plans also resolved previous freeboard exceedance issues and further stated that former
2
issues regarding the freeboard exceedances for Cell4A are closed out. Pursuant to the receipt of
the March 15, 2011 letter, freeboard limits in Cell 4A were no longer required. The solution
elevation measurements in Cell 4A are not req\lired for compliance with freeboard limits but are
required for the calculation of the daily allowable volume of fluids pumped from the Cell 4A
LDS, and as such are collected.
Table 1 -Summary of Waste Water Pool Elevations
Tailings Maximum Maximum Maximum
Cell Wastewater Elevation Wastewater Elevation Wastewater
Measured During the Permitted Under Elevation Permitted
Quarter (fmsl) License Condition Under Part I.D.2 of
10.3 (fms1) the GWDP (fmsl)
CellI 5611.72 5,615.40 5,615.50
Cell 3 Not Measured -No Limit No Limit
freeboard limit was (5,602.50*) (5,605.50*)
removed in Q 1 2011
Ce1l4A 5592.47 Freeboard limit No Limit No Limit
was removed in Q 1 (5,593.74**) , (5,595.50**)
2011.
Ce1l4B 5580.75 5594.60 5597.40
* The Executive Secretary approved the removal of the Cell 3 freeboard lImIt and authonzed the use of Ce1l4B on
January 27,2011. Cell 3 is nearly full of solids, and is undergoing pre-closure steps.
** The Executive Secretary granted a variance from the Ce1l4A freeboard limit on January 13, 2011, and approved
the removal of the Cell 4 A limit and authorized the use of Cell 4 B on January 27, 2011. The previous freeboard limit
noted above for Ce1l4A was not set out in the License. The freeboard limit of 5,593.74 for Ce1l4A was set out in a
letter from the Executive Secretary dated November 20,2008. The approved DMT Plan, Revision!!.! dated January
2011, included the removal of the freeboard limit for Cell 4A to be replaced by a freeboard limit for Cell 4B that
will accommodate the freeboard requirements of Cells !, 4A, and 4B.
4.0 QUARTERL Y SLIMES DRAIN WATER LEVEL MONITORING
4.1 General
Part I.D.3(b)(1) of the GWDP provides that the Permittee shall at all times maintain the average
wastewater recovery head in the slimes drain access pipes of each of Cells 2 and 3 to be as low
as is reasonably achievable, in accordance with the DMT Plan. Part I.D.3(b)(3) of the GWDP
provides that for Cell 3, this requirement shall apply after initiation of dewatering operations.
Part I.D.6(c) of the GWDP provides that, after the Permittee initiates pumping conditions in the
slimes drain layer in Cell 4A, the Permittee will provide: 1) continuous declining fluid heads in
the slimes drain layer, in a manner equivalent to the requirements found in Part I.D.3(b), and 2) a
maximum head of 1.0 feet in the tailings (as measured from the lowest point of the upper FML)
in 6.4 years or less. Similarly, Part I.D.13( c) of the GWDP provides that, after the Permittee
initiates pumping conditions in the slimes drain layer in Cell 4B, the Permittee will provide: 1)
continuous declining fluid heads in the slimes drain layer in a manner equivalent to the
requirements found in Part I.D.3(b), and 2) a maximum head of 1.0 feet in the tailings (as
measured from the lowest point of the upper FML) in 5.5 years or less.
3
The GWDP, dated July 14, 2011, Part I.D.3 (b)(2) states "effective July 11, 2011, the Permittee
shall conduct a quarterly slimes drain recovery test ... ". Monthly testing was conducted through
the second quarter of 2011. The frequency change dictated by the GWDP was implemented in
the third quarter 2011. The test ensures that each tailings cell meets the following minimum
requirements: 1) includes a duration of at least 90-hours, as measured from the time that
pumping ceases, and 2) achieves a stable water level at the end of the test, as measured by three
consecutive hourly water level depth measurements with no change in water level, as measured
to the nearest 0.01 foot.
At this time, dewatering operations have not commenced in Cell 3, Cell 4A, or Cell 4B. As a
result, the requirements in Part I.E.7(b) to monitor and record monthly the depth to wastewater in
the slimes drain access pipes as described in Part I.D.3 of the GWDP apply only to Cell 2 at this
time. Accordingly, this Report is limited to slimes drain recovery head information relating to
Cell 2 only.
Pursuant to Parts I.E.7(b) and I.F.2 of the GWDP, Section 8.2 of the DMT Plan and
correspondence from DRC, dated February 7, 2008, the results of quarterly recovery monitoring
of the slimes drain for Cell 2 are to be recorded and included with the results of quarterly
monitoring in the quarterly White Mesa Mill DMT Performance Standards Monitoring Report
and Cell4A and Cell4B BAT Performance Standards Monitoring Reports (the "DMT Reports").
Further, beginning in 2008, quarterly DMT Reports must include both the current year values
and a graphic comparison to the previous year. The annual slimes drain recovery head report for
2012, that addresses the requirements of Part I.F.ll of the GWDP and Section 8.2 of the DMT
Plan will be included in the 4th quarter 2012 DMT Report.
The requirement in Section 3. 1 (b) (v) of the DMT Plan to monitor the depth to wastewater in the
Cell 2 slimes drain access pipe weekly to determine maximum and minimum fluid head is a
requirement of the License and is not a DMT performance monitoring standard required by Parts
I.D.3 or I.E.7 of the GWDP and hence is not required to be included in the routine DMT
Performance Standards Monitoring Report under Part I.F.2 of the GWDP. Denison has included,
in Attachment C, the information requested by DRC for completeness and as noted in the
Denison letter dated November 14, 2011. However, as stated in the November 14, 2011 letter,
Denison revised the DMT Plan by preparing two separate plans for the GWDP and the License
requirements and submitted the revised plans on April 13, 2012. Following approval of the
plans, Denison proposes to continue providing quarterly DMT reports addressing the GWDP
DMT requirements only. Until such time as the separate plans are approved, Denison will
continue to include a summary table of this License-required information in the DMT report for
DRC convenience.
It is important to note that the Weekly Tailings Inspection Forms were changed in Revision 11.5
of the DMT Plan. Denison received approval for implementation of Revision 11.5 of the DMT
Plan on March 14, 2012. The revised forms were used for the weekly inspection conducted on
March 16, 2012 and thereafter. The Revision 11.5 DMT Plan Weekly Inspection Forms were
changed to reflect the deletion of unnecessary information, which resulted in these forms being
shortened to two pages (while in the previous revision the forms were three pages).
4
4.2 Results for the Quarter
In accordance with these requirements, the quarterly slimes drain recovery head monitoring data
for the Quarter, which includes the date and time for the start and end of the recovery test, the
initial water level, and the final depth to stable water level, as well as a weekly summary data
table for the slimes drain head measurements for the Quarter required under the License, are
included as Attachment C to this Report.
4.3 Quality Assurance Evaluation and Data Validation
Denison management has evaluated all slimes drain data collected, data collection methods, and
all related calculations required by the GWDP, and have verified the accuracy and reliability of
both the data and calculations reported.
As a result of its quality assurance evaluation and data validation review, Denison has concluded
that all of the 2009, 2010 slimes drain tailings fluid elevation measurements and the 2011
monthly (through June) and quarterly (July forward) slimes drain tailings fluid elevation
measurements to date meet the test performance standards found in Part LD.3(b )(2) of the
GWDP and can be used for purposes of determining compliance with the requirements of Part
LD.3(b)(2) of the GWDP.
4.4 Graphic Comparison to Previous Year
A graph showing the final depth to stable water level readings for each month in 2009 through
first quarter 2012 (quarterly beginning in July 2011), for which validated data is available (see
Section 4.3 above), is included as Attachment D, which shows a graphic comparison of this
Quarter's data to data for 2009, 2010, and 2011.
5.0 WEEKLY WASTEWATER LEVEL MONITORING: ROBERTS POND
During the Quarter, Mill personnel monitored and recorded weekly the wastewater levels at
Roberts Pond to determine compliance with the DMT operations standards in Part LD.3(e) of the
GWDP. Part LD.3(e) of the GWDP provides that the water level in Roberts Pond shall not
exceed an elevation of 5,624 finsl.
The maximum wastewater elevation measured in Robert's Pond during the quarter was 5,621.72
fmsl, which did not exceed the maximum permitted elevation of 5,624 finsl. The results of such
monitoring are included in Attachment A.
6.0 WEEKLY FEEDSTOCK STORAGE AREA INSPECTIONS AND INSPECTIONS
OF FEEDSTOCK MATERIAL STORED OUTSIDE THE FEEDSTOCK STORAGE
AREA
Weekly feedstock storage area inspections were performed by the Mill's Radiation Safety
Department, to confirm that the bulk feedstock materials are stored and maintained within the
5
defined area described in the GWDP and that all alternate feedstock located outside the defined
feedstock area is maintained within containers that comply with the requirements of Part I.D.11
of the GWDP. The results of these inspections are recorded on the Weekly Mill Inspection
forms, which are available at the Mill for inspection. One item was noted during the weekly
inspections this quarter. During the weekly inspections conducted on January 27, 2012,
February 9, 2012, February 17, 2012, and March 2, 2012 a small quantity of standing water was
noted in the feedstock storage areas. The water was the result of heavy precipitation. No
corrective actions were necessary as the areas where water was noted are sloped towards a
drainage sump that allows the water to drain to Cell 1. The remaining water noted was a residual
amount which remained after the majority of the rain water had drained to Cell 1.
7.0 TAILINGS CELLS AND POND LINER SYSTEM REPAIRS
The liner systems at Cells 1, 2, 3, 4A, and 4B were inspected on a daily basis pursuant to the
requirements of Sections 2.1 and 2.2 of the Mill's DMT Plan. The results of those inspections
are recorded on the Mill's Daily Inspection Data sheets, which are available at the Mill for
review. A visual inspection of Roberts Pond was performed on a weekly basis. The results of
those inspections are recorded on the Weekly Mill Inspection forms, which are available at the
Mill for review.
In accordance with Part I.E.7(f) of the GWDP, in the event that any liner defect or damage is
identified during a liner system inspection, the Mill shall immediately implement the currently
approved Liner Maintenance Provisions. Further, Part I.F. 2 of the GWDP provides that when a
liner repair is performed at any tailings cell or at Roberts Pond, a Repair Report shall be prepared
and included with the next quarterly DMT report.
Mill personnel detected an accumulation of fluid in the LDS standpipe of Cell 1 on Wednesday,
June 2, 2010. Transfer of fluids from Cell 1 to Cell 4A to lower the Cell 1 level sufficiently to
detect and repair any damage began on June 2,2010. Maintenance identified some FML damage
and performed repairs during the period when the level was lowest. Following the repairs, the
level was allowed to gradually return to its June 3 level of 5614.57 feet and the LDS remained
dry until, after a period of heavy rains in late July and early August (and an increase in the
solution in level in Cell 1), a recurrence of the LDS liquid level was identified on August 7,
2010. At that time, the Mill resumed pumping CellI to Ce1l4A to lower the solution level.
During discussions on August 12,2010, DRC personnel agreed with Denison that both the June
and August identifications of LDS solutions were part of one event. The temporary cessation of
flow into the LDS between June and August detections may have resulted from lowering the
solution level to a point below some tears or damage that were not identified during the July
repair efforts. Denison submitted to DRC a plan and schedule for inspection and repair, if
necessary, of the inside slope areas of the Cell 1 FML above the 5613 foot level, on August 18,
2010, and an updated plan on August 30,2010. DRC conditionally approved the updated plan
in a letter dated September 22, 2010. The updated plan commits to completion of the repairs by
July 31, 2012.
6
The September 22, 2010 DRC letter and Part 1.F.2 of the GWDP require that the repairs be
documented in a liner repair report which shall be included with the next quarterly DMT report,
that is, in the DMT Report following completion of the repairs to be reported. Consistent with
the proposed date for completion of repairs in July 2012, Denison will include the required repair
report with the third quarter DMT report to be submitted on December 1,2012.
During the Quarter, no liner repairs were performed at any of the Mill's tailings cells. Consistent
with the approved repair plan and schedule, repairs to the Cell 1 FML were conducted during the
months of September and October 2010, and ceased during the months of November and
December 2010. Repairs to the Cell 1 liner resumed in April 2011 and stopped in October 2011
for the winter. Repairs to the CellI liner resumed again in April 2012.
8.0 DECONTAMINATION PADS
8.1 Summary of Weekly Inspections
Part I.F.7 (g) of the GWDP and Section 3.1 of the DMT Plan require that a weekly inspection of
the New Decontamination Pad be performed, including that the vertical inspection portals on the
New Decontamination Pad which are located between the primary and secondary containments
be visually observed on a weekly basis as a means of detecting any leakage from the primary
containment into the void between the primary and secondary containments. The BAT
performance standards for the New Decontamination Pad are set out in Part I.D.14 of the
GWDP. The New Decontamination Pad was placed into service on March 22,2010. Use of the
New Decontamination Pad was temporarily suspended during the second quarter 2010 as a result
of a cease and desist order from DRC dated May 18, 2010. Because the New Decontamination
Pad was not in use after the second quarter 2010, the weekly inspections of the containments
were stopped for the remainder of 2010. The Executive Secretary provided authorization for use
of the New Decontamination Pad in a letter dated February 1, 2011. Use of the New
Decontamination Pad resumed in February 2011 and the weekly inspections were resumed as
required.
Table 2 below indicates the water level measurements in each portal measured during the 4th
quarter 2011.
7
Table 2 -New Decontamination Pad Inspection Portal Level for the Fourth Quarter 2011
Portal! Portal 2 Portal 3
Liquid Level Liquid Level Liquid Level
Date (in Feet) (in Feet) (in Feet)
116/2012 0.00 0.00 0.00
1113/2012 0.00 0.00 0.00
1120/2012 0.00 0.00 0.00
1127/2012 0.00 0.00 0.00
2/3/2012 0.00 0.00 0.00
2110/2012 0.00 0.00 0.00
2117/2012 0.00 0.00 0.00
2/24/2012 0.00 0.00 0.00
3/212012 0.00 0.00 0.00
3/9/2012 0.00 0.00 0.00
3116/2012 0.00 0.00 0.00
3/23/2012 0.00 0.00 0.00
3/30/2012 0.00 0.00 0.00
As can be seen from the foregoing table, no fluids were observed to be present in any of the
portals during the quarter.
Any soil and debris identified during the weekly inspections was removed from the wash pad of
the New Decontamination Pad, in accordance with part I.D.14 (a) of the GWDP and Section 3.1
(e)(i)(F) of the DMT Plan. No cracks greater than 118" were observed during any weekly
inspections.
8.2 Annual Inspection of Existing Decontamination Pad
As required by Part I.F .12 of the Permit, annual inspections of the existing decontamination pad
must be conducted during the second quarter of each year. The documentation for the 2011
annual inspections was reported in the Second Quarter DMT report submitted August 31, 2011.
The 2012 annual inspection will be conducted during the second quarter of 2012.
8.3 Annual Inspection of New Decontamination Pad
As previously stated, the New Decontamination Pad was placed into service on March 22, 2010.
Use of the New Decontamination Pad was temporarily suspended as a result ofa cease and desist
order from DRC dated May 18, 2010. DRC's approval for use of the New Decontamination Pad
was granted on February 1, 2011, following submittal of revisions to the DMT Plan and DRC
observation of hydrostatic testing of the in-ground water holding tanks. Revisions to the DMT
Plan were submitted by Denison on November 12, 2010 and reviewed by DRC. Hydrostatic
testing was re-performed from November 24 to 26, 2010 following a 10-day advanced notice to
DRC on November 12, 2010. The Executive Secretary provided an authorization for use of the
8
New Decontamination Pad in a letter dated February 1, 2011. Use of the New Decontamination
Pad resumed in February 2011.
Annual inspections of the new decontamination pad will be conducted during the second quarter
of each year. The documentation for the annual inspections was reported in the Second Quarter
DMT report submitted August 31, 2011. The 2012 annual inspection will be conducted during
the second quarter of2012.
9.0 CELL 4A AND CELL 4B BAT PERFORMANCE STANDARDS REPORT FOR
THE QUARTER
This Section constitutes the routine Cell 4A and Cell 4B BAT Performance Standards
Monitoring Report for the Quarter, as required under Part I.F.3 of the GWDP.
9.1 LDS Monitoring
9.1.1 Operational Status of LDS Pumping and Monitoring Equipment
The LDS pumping and monitoring equipment for each ofCe1l4A and Ce1l4B, including, but not
limited to, the submersible pump, pump controller, head monitoring, and flow meter equipment,
operated continuously during the Quarter except as noted below and as detailed in the Notice
pursuant to Part I.G.3 of the GWDP which is included in Attachment B of this report.
Ce1l4A
During the Quarter, there were no failures of any pumping or monitoring equipment not repaired
and made fully operational within 24-hours of discovery, as contemplated by Part I.E.8(a)(1) for
Ce1l4A.
Ce1l4B
There was one failure of the monitoring equipment in Cell 4B LDS which was not made
operational within 24-hours of discovery, as contemplated by Part I.E. 12(a)(1) of the GWDP for
Cell 4B. It is important to note that the pumping equipment for Cell 4B LDS remained fully
operational throughout the quarter, but the electronic flow meter associated with the Cell 4B
LDS malfunctioned during the quarter. On March 14, 2012 it was noted by Field Personnel that
the hourly flow rate was not being recorded. The LDS system was measuring solution level,
total gallons pumped and hourly flow rate, but was only displaying and recording solution level
and total gallons pumped. A data download indicated that the system had not recorded hourly
readings since 15:00 (3:00 PM) the previous day (March 13, 2012). The manufacturer
determined that the failure appeared to result from a disconnect between the flow meter and
processor and as a result flow data were being measured but not stored and could not be
downloaded. The manufacturer determined that the Programmable Logic Controller ("PLC")
required replacement. A replacement PLC was received and installed at the Mill on March 16,
2012.
9
Detailed information regarding the root cause, corrective actions and the affirmative defense
surrounding this issue are included in the Notice pursuant to Part I.G.3 of the GWDP which was
submitted to UDEQ on March 19,2012 and is included in Attachment B of this report.
9.1.2 Measurement of Weekly Fluid Head at the Lowest Point in the Secondary FML
The readings pertaining to the fluid head above the lowest point in the secondary FML for Cells
4A and 4B are provided in Attachment F.
As can be seen from a review of Attachment F, at no point in the Quarter did the fluid head in the
Cell 4A LDS sump exceed a I-foot level above the lowest point in the lower FML on the Cell
floor (where for purposes of compliance monitoring this I-foot distance equates to 2.28 feet
[27.36 inches] above the LDS system transducer), as stipulated by Part I.E.8(a)(2) of the GWDP.
During the Quarter, the fluid head in the Cell 4A LDS sump did not exceed 14.8 inches above
the LDS transducer.
As can be seen from a review of Attachment F, at no point in the Quarter did the fluid head in the
Cell 4B LDS sump exceed a I-foot level above the lowest point in the lower FML on the Cell
floor, as stipulated by Part I.E.12(a)(2) of the GWDP. For the purposes of compliance
monitoring this I-foot distance equates to 2.25 feet (27 inches) above the LDS system. During
the quarter the fluid head in Cell4B sump did not exceed 2.13 inches above the LDS transducer.
9.1.3 Measurement of the Volume of Flu ids Pumpedfrom the LDS
The readings pertaining to the volume of fluids pumped are provided in Attachment F.
Cell4A
As can be seen from a review of Attachment F, 2,239 gallons of fluid were pumped from the Cell
4A LDS for the first quarter of 2012. Based on this, the average daily LDS flow volume in Cell
4A did not exceed 24,160 gallons/day, as stipulated by Part I.E.8(a)(3) of the GWDP.
Daily allowable volume of fluids pumped from the Cell 4A LDS have also been calculated based
on weekly tailings cell fluid measurements using the calculations provided in the Cell 4A BAT
Operations and Maintenance Plan. A letter from the Executive Secretary dated January 27,
2011 which approved the use of Cell 4B, and a subsequent letter dated March 15, 2011, stated
approval of the DMT and Cell 4A Operations and Maintenance ("O&M") Plans and effectively
eliminated the former freeboard elevation requirements for tailings Cell 4A. Pursuant to the
receipt of the March 15, 2011 letter, freeboard limits in Cell 4A were no longer required.
However, the weekly wastewater elevations were completed in order to calculate the maximum
daily allowable flow volume, based on in the Cell 4A BAT Operations and Maintenance Plan.
Based on the wastewater pool elevation surveys conducted during the quarter, and the maximum
head recorded on the FML during the Quarter of approximately 37 feet, the allowable flow rate
would be approximately 604.0 gallons/acres/day, as determined under the Mill's Cell 4B BAT
Operations and Maintenance Plan, Table 1A (also included in Attachment F of this report), and
assuming a liner elevation of 5555.55 feet and approximately 40 acres of liquid area. The
average daily flow volume in Cell 4A did not exceed the calculated flow volume of 24,160
10
gallons/day. As mentioned above, during first quarter of 2012, 2,239 gallons of fluid were
pumped from Cell 4A LDS during the period and did not exceed the calculated flow volume.
The first quarter allowable flow rate calculation for Cell 4A is included in Attachment F of this
report.
Cell4B
As can be seen from a review of Attachment F, the 5 gallons of fluid that were pumped from the
Cell 4B LDS for the first quarter of 2012 were below the 26,145 gallons/day limit, as stipulated
by Part I.E. 12(a)(3) of the GWDP.
Based on the wastewater pool elevation surveys conducted during the quarter, the maximum
head recorded on the FML during the Quarter was about 23.25 feet. The allowable flow rate
would therefore be approximately 475.6 gallons/acres/day, as determined under the Mill's Cell
4B BAT Operations and Maintenance Plan, Table 1B (also included in Attachment F of this
report), and assuming a liner elevation of 5557.5 feet and approximately 36.17 acres of liquid
area. The average daily flow volume in Cell 4B did not exceed the calculated flow volume of
17,202 gallons/day. During first quarter 2012, a total of 5 gallons were pumped from Cell 4B
LDS during the period and did not exceed the calculated flow volume. The first quarter
allowable flow rate calculation for Cell4B is included in Attachment F of this report.
9.2 Measurement of Weekly Wastewater Fluids in Cells 4A and 4B
Weekly fluid elevations for Cells 4A and 4B for the quarter are provided in Attachment A along
with elevations for Cell 1 and Roberts Pond.
9.3 Slimes Drain Recovery Head Monitoring
As the Mill has not initiated pumping conditions in the Cell4A or Cell4B slimes drain system at
this time, monthly recovery head tests and fluid level measurements are not required to be made
at this time pursuant to Part I.E.8(b) of the GWDP.
10.0 CELL 1 AND CELL 3 LDS MONITORING FOR THE QUARTER
The requirement in Section 3.1(a) of the DMT Plan to monitor the LDS for Cells 1 and 3 is a
requirement of the License and is not a DMT performance monitoring standard required by Parts
I.D.3 or I.E.7 of the GWDP, and hence is not required to be included in the routine DMT
Performance Standards Monitoring Report under Part I.F.2 of the GWDP. Denison has included
in Attachment F the information requested by DRC for completeness, as noted in the Denison
letter dated November 14, 2011. However, as stated in the November 14, 2011 letter, Denison
revised the DMT Plan by preparing two separate plans for the GWDP and the License
requirements. Following approval of the plans, Denison proposes to continue providing
quarterly DMT reports addressing the GWDP DMT requirements only. Until such time as· the
separate plans are approved, Denison will continue to include a summary table of this License-
required information in the DMT report for DRC convenience.
11
10.1 Operational Status ofLDS Pumping and Monitoring Equipment
The LDS pumping and monitoring equipment for each of Cells 1, and 3, including, but not
limited to, the submersible pump, pump controller, head monitoring, and flow meter equipment,
operated continuously during the Quarter.
For Cell 1, during the fourth Quarter, there were no failures of any pumping or monitoring
equipment not repaired and made fully operational within 24-hours of discovery.
For Cell 3, during the fourth Quarter, there were no failures of any pumping or monitoring
equipment not repaired and made fully operational within 24-hours of discovery.
10.2 Measurement of the Volume of Fluids Pumped from the LDS
No fluids were pumped from the Cell 1 or 3 LDSs during the quarter because no fluids were
detected in either the CellI or Cell 3 LDS.
10.3 Measurement of Weekly Wastewater Fluids in Cells 1, and 3
A summary of the fluid elevations for the Cell 1 and 3 LDSs for the quarter are provided in
Attachment F. The LDS for Cells 1 and 3 were dry during the quarter.
10.4 Slimes Drain Recovery Head Monitoring
As the Mill has not initiated pumping conditions in the Cell 1 or Cell 3 slimes drain system at
this time, monthly recovery head tests and fluid level measurements are not required to be made
at this time.
11.0 ANNUAL SLIMES DRAIN RECOVERY HEAD REPORT FOR THE
CALENDAR YEAR 2011
The annual slimes drain recovery head report for Cell 2 for calendar year 2012 (the "Period"), as
required under Parts LD.3 (b) and LF.ll of the GWDP and Section 8.2 of the DMT Plan will be
included with the 4th quarter DMT report which will be submitted on or before March 1,2013.
12
12.0 SIGNATURE AND CERTIFICATION
This document was prepared by Denison on May 30,2012.
Denison Mines (
13
CERTIFICATION:
I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate
and com teo I am aware that there are significant penalties for submitting false information,
includi he ssibility of fine and imprisonment for knowing violations.
id C. F ydenlund
Vice President, Regulatory affairs and Counsel
Denison Mines (USA) Corp.
14
Attachment A
Date
Free Board
Limit under the
License 1
1/6/2012
1/13/2012
1/20/2012
1/27/2012
2/4/2012
2/10/2012
2/17/2012
2/24/2012
3/2/2012
3/9/2012
3/16/2012
3/23/2012
3/30/2012
5615.40
5611.64
5611.57
5611.68
5610.32
5611.68
5611.64
5611.72
5611.58
5611.67
5611.52
5611.58
5611.59
5611.59
Tailings Pond Elevations
1 st Quarter Elevations
Cell 3 2 Roberts Pond
5602.50 5624.00
No longer required 5621.20
No longer required 5621.03
No longer required 5621.72
No longer required 5620.04
No longer required 5619.03
No longer required 5619.31
No longer required 5618.98
No longer required 5619.22
No longer required 5620.02
No longer required 5619.70
No longer required 5619.20
No longer required 5619.50
No longer required 5619.52
Ce1l4A 3 Ce1l4B 4
5593.74 5594.60
5589.73 5578.83
5590.14 5578.80
5590.56 5578.78
5590.82 5578.75
5591.64 5578.81
5591.95 5578.80
5592.47 5578.89
5592.18 5579.34
5592.13 5579.87
5592.10 5580.06
5591.98 5580.30
5591.65 5580.46
5591.31 5580.75
1 The freeboard limit as permitted under License condition 10.3 is no longer applicable to Cell 3 or Ce1l4A.
2Cell 3 is nearly full of solids, is undergoing pre-closure steps, and the freeboard limit specified here is no longer
required and the weekly measurements are no longer required per the January 27 and March 14, 2011 letters from
DRC.
3 The freeboard limit for Ce1l4A is not set out in the License. The freeboard limit of 5,593.74 for Ce1l4A is set out in
a letter from the Executive Secretary dated November 20,2008. Denison proposed in the DMT Plan revision dated
November 12,2010 the removal of the freeboard limit for Cell4A to be replaced by a freeboard limit for new Cell4B
that will accommodate the freeboard requirements of Cells 2, 3, 4A, and 4B. The Executive Secretary granted a
variance from the Cell4A freeboard limit on January 13, 2011 and approved the removal of the Cell4A limit and the
use of Cell 4 B on January 27, 2011. The weekly measurements are no longer required for compliance with freeboard
limts, but are required to calculate the daily permissable leakage rate for CeIl4A.
4 The freeboard limit listed is the value specified in the DMT plan when the pool surface area is 40 acres. A pool
surface area of 40 acres is used because there are no beaches present in Cell4B at this time.
Attachment B
E
March 19, 2012
VIA EaMAIL AND OVERNIGHT DELIVERY
Rusty Lundberg, Co-Executive Secretary
Utah Water Quality Board
Utah Department of Environmental Quality
195 North 1950 West
P.O. Box 144810
Salt Lake City, UT 84114-4810
Denison Mines (USA) Corp.
1050 17th Street, Suite 950
Denver, CO 80265
USA
Tel: [phone]
Fax : [phone]
www.denisonmines.com
Re: State of Utah Ground Water Discharge Permit No. UGW370004 White Mesa Uranium Mill -
Notice Pursuant to Part I.G.S of the Permit and UAC R317-6~6.16(C)
Dear Mr. Lundberg:
Please take notice pursuant to Part I.G.3 of the White Mesa Mill's (the "Mill's") State of Utah Groundwater
Discharge Permit No. UGW370004 (the "Permit") and Utah Administrative Code ("UAC") R317 -6-6.16(C) that
Denison Mines (USA) Corp. ("Denison"), as operator of the Mill and holder of the Permit, failed to meet the
Best Available Technology ("BAT") standards in Part 1.0.12a) 1) of the Permit, as a result of a malfunctioning
interface in the Cell 48 leak detection system ("LOS"), as described in more detail below.
The malfunction was discovered during the daily tailings inspection on Wednesday, March 14, 2011. Initial
notice of this failure to maintain BAT was given by telephone to Mr. Russ Topham of the Utah Division of
Radiation Control ("ORC") at 1 :35pm on Wednesday March 14, 2011 at 801-536-4256 (within 24 hours of the
discovery) .
1. Facts and Background Information
a) DRe provided authorization for Lise of Cell 48 on January 27, 2011.
b) Part 1.E.12 a) 1) of the Permit requires that
" ... the permittee shall provide continuous operation of the leak detection system pumping and
monitoring equipment, including, but not limited to, the submersible pump, pump controller, head
monitoring, and flow meter equipment approved by the Executive Secretary."
c) Section 3.1 a) of the Best Available Technology/Discharge Minimization Technology Plan states that
"The Cell 4A and 4B leak detection systems are monitored on a continuous basis by use of a
pressure transducer that feeds water level information to an electronic data collector ... The water
levels are measured every hour and the information is stored for later retrieval."
Y:\Notices\03.15.12 Notice to R Lundberg cell 48\03. "19.12 Notice to RLundberg Cell 48 LOS.doc
Letter to Mr. Rusty Lundberg
March 19,2012
Page 2
d) Daily monitoring of the Cell 4B LOS prior to the week of March 14, 2012 indicated that the
components of the pumping and "flow monitoring system (pump, pump controller, flow meter, flow
totalizer, and all other components) were working properly.
e) Daily monitoring of the Cell 48 LDS on March 14, 2012 indicated that the system was measuring,
solution level, total gallons pumped, and hourly flow rate, but was only displaying and recording
solution level and total gallons pumped. That is, the hourly flow rate was not being recorded. A data
download indicated that the system had not recorded hourly readings since 15:00 (3:00 PM) on
Tuesday, March 13, 2012, several hours after the previous day's daily tailings inspection.
f) The pump controller flow meter, and totalize were all working correctly.
g) Mill environmental personnel reported the 'finding to the Mill manager and to Mill engineering
personnel on March 14, 2012. Mill engineering personnel began immediate telephone
communications with the supplier to diagnose and troubleshoot the malfunction.
h) Corporate environmental management determined on March 14, 2012 that notification to DRC of the
status of troubleshooting and repair plans was required under Part I.G.3 of the Permit and UAC
R3"17-6-6.16(c), and notification was made as stated above.
2. Action Taken
a) Mill environmental and engineering personnel determined that the failure appeared to result from a
disconnect between the flow meter and the processor and as a result, flow rate data was being
measured, but not recorded or stored, and could not be downloaded.
b) The manufacturer, Environmental Pump Solutions, determined on Thursday, March 15, 2012 that the
failure required replacement of the Programmable Logic Controller ("PLC") unit in the processor. The
manufacturer shipped a replacement PLC unit overnight.
c) A replacement PLC unit was received at the Mill on Friday, March 16, 2012.
d) The unit was installed on March 16, 2012. System checking and startup was completed on Friday,
March 16, 2012
e) Mill engineering personnel, mill environmental personnel, and Corporate environmental management
discussed the corrective steps taken and a path forward on March 16, 2012.
f) Daily inspection and monitoring of the system will continue to confirm that the repair has corrected
the over-recording problem.
3. Root Cause
The root cause analysis is as follows
a) The flow rate meter is one of the data input devices whose data is controlled by the PLC unit. It was
determined that the nature of the failure to record flow required replacement of the PLC unit.
OENBSON
i'/UNES
Letter to Mr. Rusty Lundberg
March 19,2012
Page 3
4. Actions That Will be Taken to Prevent a Reoccurrence of this Incident
The following actions will be taken to prevent a reoccurrence of this incident:
a) Mill personnel installed a replacement for the malfunctioning PLC Unit.
b) Mill personnel will check the performance of the monitoring system daily for two weeks to confirm the
PLC continues to function properly.
c) Mill engineering personnel are evaluating alternative systems and suppliers for a more robust
alternative controller and data recorder, if necessary, to replace the existing system.
5. Affirmative Defense
Denison believes that the affirmative defense in Part !.G.3.c) of the Permit should be applicable to this
incident, for the following reasons:
a) Notification
By virtue of the initial oral notification given to DRC at 1 :35 PM on March 14, 2012 (within 24 hours of the
discovery) and this written notice, Denison has submitted notification according to Part I.G .3 of the Permit and
UAC R317-6-6.13.
b) Failure Was Not Intentional or Caused by the Permittee's Negligence
The failure to continuously measure the fluid volume pumped from the Cell 4B LOS was not caused by
Denison's negligence, either in action or in failure to act. The programmable logic controller which records
the hourly flow rate from the flow meter malfunctioned. Mill personnel discovered the mal'function and
initiated diagnosis, in conjunction with the manufacturer, and repair in a timely manner.
c) The Permittee Has Taken Adequate Measures to Meet Permit Conditions
Mill personnel confirmed that the LOS head level monitoring equipment, LOS pump, pump flow meter, and flow
totalizer were functioning throughout the entire period of diagnostics and repair. The LOS pumping circuit was
and continues to operate properly. The maximum allowable head was and continues to be measured correctly.
As soon as it was determined that the hourly flow rate was not being transferred to the data recorder, diagnostic
and repair measures were immediately implemented to reinstitute recording of the hourly flow rates.
d) Denison Has Taken Adequate Measures to Meet Permit Conditions in a Timely Manner.
The provisions of the Permit were implemented immediately. UDEQ was notified within 24 hours of discovery
of the measurement inaccuracy. Diagnostics of the system were initiated immediately upon Mill personnel's
identification of the potential malfunction. A replacement PLC unit was ordered as soon as the
manufacturer's diagnostics determined it was the source of the malfunction. Delivery and installation of the
replacement PLC was completed on March 16, 2011.
e) The Provisions of UCA 19-5-107 Have Not Been Violated
The provisions of Utah Code 19-5-107 have not been violated. There has been no discharge of a pollutant
into waters of th e state. Denison has not caused pollution which constitutes a menace to public health and
welfare, or is harmful to wildlife, fish or aquatic life, or impairs domestic, agricultural, industrial, recreational, or
other beneficial uses of water, nor has Denison placed or caused to be placed any waste in a location where
there is probable cause to believe it will cause pollution.
OIENISO
MINES
Letter to Mr. Rusty Lundberg
March 19,2012
Page 4
There was no discharge of solutions from the Mill's tailings impoundments.
Please contact the undersigned if you have any questions or require any further information.
Yours very truly,
DENISON MINES (USA) CORP.
el f2v. ~~~~~ !t;nnTiS::
Director, Compliance and Permitting
cc: Dan Hillsten
David C. Frydenlund
Harold R. Roberts
David E. Turk
Central files
Attachment C
· QUARTERLY HEAD MEASUREMENT TEST
Location: Date: 3/12/2012
Slimes Cell # 2
Sampler: Garrin Palmer
Tanner Holliday
3/5/12 3/6/12 3/7/12 3/8/12 3/9/12 3/10/12 3/11/12 3/12/12
600
700 35.70 26.74 24.15 23.43 22.79
800 34.55 25.62 24.11 23.42 22.77 20.90
900 33.82 26.45 24.08 23.41 22.74 20.90
1000 33.09 26.29 24.05 23.40 22.71 20.90
1100 32.53 26.17 24.02 23.37 22.67
1200 32.01 25.95 23.98 23.33 22.63
1300 31.63 25.77 23.95 23.30 22.59
1400 31.05 25.60 23.92 23.25 22.52 21.78
1500 30.65 25.44 23.90 23.21 22.46 21.20
1600
Comments: Readings were taken Saturday the 10th and Sunday the 11th.
The final reading for the quarter is 20.90.
1/6/2012 35.19 37.00 2.78 0.97 Yes
1/13/2012* 26.39 31.51 11.58 6.46 Yes
1/20/2012 28.45 33.29 9.52 4.68 Yes
1/27/2012 34.85 36.53 3.12 1.44 Yes
2/3/2012 35.30 36.20 2.67 1.77 Yes
2/10/2012 35.65 36.61 2.32 1.36 Yes
2/17/2012 35.51 37.02 2.46 0.95 Yes
2/24/2012 35.30 37.09 2.67 0.88 Yes
3/2/2012 35.43 37.01 2.54 0.96 Yes
3/9/2012 N/A N/A N/C N/C Yes
3/16/2012 35.65 36.71 2.32 1.26 Yes
3/23/2012 35.15 36.75 2.82 1.22 Yes
3/30/2012 35.31 36.80 2.66 1.17 Yes
N/A -Unable to perform due to recovery test.
NC -Head levels not calculated, because no measurement was taken this week.
* The electrical power to the pump was interrupted and the power to the pump electrical system was
off when Field Personnel arrived for inspection. The power protection system was reset and the
pump was started as required.
The pre and post-pump head level calculations are done as follows:
Pre-pump head = (37.97(ft) -depth to liquid pre-pump)
Post-pump head = (37.97 (ft) -depth to liquid post-pump)
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denison11.l
Page 28 of49
Date: \ ~ {; ~ 2!P I '7-
1. Pond and Beach
elevations (msI, ft)
APPENDIX A (CONT)
DENISON MINES (USA) CORP.
WEEKLY TAILINGS INSPECTION
CellI: (a) Pond Solution Elevation
(b) Flv1L Bottom Elevation 5597--.-_-
(c) Depth of Water above FNIL «a)-(b))====1_y'-"" ........ 6;......Y-'--_
Ce1l4A: (a)Pond Solution Elevation 5 $ gg. 73
(b)FN1L Bottom Elevation ___ 5555.14_
(c )Deptb of Water above FML «a)-Cb)) 3 y . S 9
Ce1l4B: (a)Pond Solution Elevation S57<Jr g3
Cb)FML Bottom Elevation 5557.50
(c)Depth of Water above FML «a)-(b)) 71 33
(d)Elevation of Beach Area with Highest Elevation
(montllly) A/A
Roberts
Pond: (a)Pond Solution Elevation 56?1 ( M
(b)FML Bottom Elevation ____ 5612.3-
(c )Depth of Water above FML ( a)-(b)) __ --:.,.!.~:....::;.P_q+-._
2. Slimes Drain Liquid Levels Cell 2 Pump functioning properly ~
__ >=-=S_~_l_tt",-____ Depth to Liquid pre-pump
__ '3_7_" (,?_~ __ Depth to Liquid Post-pump
(all measurements are depth-in-pipe)
:Sf ~ 17
Pre-pump head is S' -Depth to Liquid Pre-pump =
2 .. 7f 37.'1'1
Post-pump head is U' -Depth to Liquid Post-
pump = C2~q7
C:\Docurnents and Settings\dturk.DMC\Loca1 Settings\Temporary Internet FiIes\Content.Outlook\V113Y6S1l\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -RedJine.doc '
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
3. Leak Detection Systems
Observation:
CellI Cell 2
Is LDS wet or __ wet __ wet
dry? vclry ~dry
Cell 3
__ wet
~dry
01111 Revision: Denison 11.1
Page 29 of49
Ce1l4A Ce1l4B
~wet ~wet
-dry dry
If wet, Record --Ftto --Ftto -' Ft to 10.6 Ftto \"0 Pt to
liquid level: Liquid Liquid Liquid Li.guid * Liquid *
If sufficient Volume Volume -Volume Volume Volume
fluid is -....-------......-~U~4bc ~8:
present, record Flow Flow Flow Flow Flow
volume of Rate -Rate --Rate ---Rate~ Rate --
fluid pumped
and flow rate:
Was fluid __ yes~no __ yes~no __ yes~no --1L'yes_~no __ yes~no
sample
collected?
Observation:
New Decon Pad~ New Decon Pad2 New Decon Pad
Portal! Portal 2 Portal 3
Is LDS (portal) __ wet~dry __ wet L/"" dry __ wet /dry
wet or dry?
If wet~ Record ,--Ftto ---Ftto ----Ftto
liquid level: Liquid Liquid Liquid
If wet~ Repolt to
RSO
I • : .. ~ i!. "'_Yo ..
4. Tailings Area Inspectiori'(N~te dispersal of blowing tailings):
t:~~ttl~!"~--:~"j, J:'b~lJ:~~~ t:t!1~4~~A:A ~k
V'-t..~ S G t+-I e.-VV\. e A-t .N\.eI v'\.: +-0 (' ..s m 0 "'-e-.~ H :> "
5. Control Methods hnplemented: .s1~VVlV$ 2. rJ..,t; !;ok" L.A..-c LJc,-s olc.J6 VP So
(oj td/0·+: C6A.. r) be + S C CI u t lil 10 l-t ~ (k t', .A-Oy.. "lr& et l' ~ .$ CO 1 ~.A.. c...
) 6. Jem~rks~ l 0 ~e I L t e..J... ~ I\. ,If A/I: ffi "r; CQr-e ~ he t cA. L. ke...A,b e.A ~\.u,c f-e--II
--'" J<-..:M\ (C0. [AS 1
C:\Documents and Settings\dturkDMOLoca1 Settings\Temporary Internet Files\Content.OutlookWM3Y6SlI\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denison11.1
Page 30 of49
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 amsl for CeI14A and 5558.50 for Ce1l4B)? ~no __ yes
If Ce1l4A leak detection system level exceeds 12 inches above the lowest point on the bottom flexible
membrane liner (elevation 5556.14 amsl), notify supervisor or Mill manager immediately.
C:\Docllments and Settings\dturk.DMC\Local Settings\Temporary Internet Files\Content.Outlook\VM3Y6S1I\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc
't,i .. White Mesa Mill-Standard Operating Procedures
Book 11: Ellvironmental Protection Manual, Section 3.1
01111 Revision: Denison11.l
Page 28 of 49
Date:J/t3/~ A
1. Pond and Beach
elevations (msI, ft)
APPENDIX A (CONT)
DENISON MINES (USA) CORP.
WEEKLY TAILINGS INSPECTION
Inspectors: ~ner 1-1.11."11 \ (;fA rr;" 8JM J
CellI: (a) Pond Solution Elevation S~I\.51
(b) FML Bottom Elevation ___ 5597 __ _
(c) Depth of Water aboveFML «a)-(b» _.....;.1 "i_,_S_1 __ _
Ce1l4A: (a)Pond Solution Elevation 5S40.l1.f
(b)FML Bottom Elevation ___ 5555.14_
(c )Depth of Water above F!v.IL «a)-(b)) __ 3-5~ __ _
Ce1l4B: (a)Pond Solution Elevation SS,g·tsC
Roberts
(b)FML Bottom Elevation 5557.50
(c)Depth of Water above FML «a)-(b)) ~.1 ,."'~
(d)Elevation of Beach Area with Highest Elevation
(monthly)
Pond: (a)Pond Solution Blevation Sb~\ .D3
(b)FML Bottom Elevation __ 5612.3_
(c )Depth of Water above FML « a)-(b») _---:~::;...;..f...;..,J.;..__--
2. Slimes Drain Liquid Levels Cell 2 Pump functioning properly .,..,.!\j",,",,£.,--:,,_~
& \'=1 ~o..~ -r"~f~~J.*
R~~eJ (}J\~ ~~~~r'\t.A
\~lLcJL\~ \-€.~\-.
--..;co-=" :,..:::=b",-" ':s""'8-L-___ .Depth to Liquid pre-pump
_-"":!>o:....Il ....... _!)~I ___ ,Depth to Liquid PostMpump
(all measurements are depth-in-pipe)
37.;<r7
Pre-pump head is .'-Depth to Liquid Pre-pump =
11 ... 58 37 .. 'l 7
Post-purnD head is-B' -Depth to Liquid Post-
pump=_ 6~ '16
C:\Docuruents and Settings\dturk.DMC\Local Settings\Temporary Internet Files\Content.Outlook\VM3Y6S1l\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc .
f.,.:~ a "'4
.-.' j[l
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denison 1 1. 1
Page 29 of 49
3. Leak Detection Systems
Observation:
CellI Cell 2 Cell 3 Ce1l4A
IsLDS wet or __ wet __ wet __ wet ~wet
dry? /ruy ~dry /dry dry
If wet, Record Ftto Ftto Ftto ~-" Ftto
liquid level: Liquid Liquid Liquid Liquid *
If sufficient Volume Volume ' Volume Volume
fluid is .... -.,; !2.b'14 '-C
present, record Flow Flow Flow Flow
volume of Rate Q Rate & Rate "1) Rate 0
fluid pumped
and flow rate:
Was fluid __ yes~o __ yes~no .~_yes~no __ yes~no
sample
collected?
Observation:
New Decon Pad~ New Decon Pad2 New Decon Pad
Portall Porta12 Portal 3
/'
Is LDS (portal) __ wet-Ldry __ wet~dry __ wet~dry
wet or dry?
If wet, Record -Ptto -Ftto ~ Ftto
liquid level: Liquid Liquid Liquid
If wet, Report to
RSO
5. ControIMethodsImplemented:w<:. c..ol'\~i(lCAC -+b Rcs~ G-FL C>I' .Si"M~..s :#.=2., R~~ tbu''''''l<~j jI l!:Ji -+0 ~"~~0 dPcer ;:fr M "n Joe'" :
6. Remarks: ~ tt>\.c·hJ (Af'~ 01"l1'Sh<7J <Q \NA('..f~riJ »;'.,JrA1c .fh ~ w f2-r!'/;(.,
:\ l-DoJ.s £ II ~ Dv..Mp~~ J-his c,.).{}<:Y--(E d' ;-J!... ~h )
Ce1l4B
~wet
.dry
l '~~ . Ftto
Liquid *
Volume
1~
Flow
Rate rj
__ yes-Lno
C:\Documents and Settings\dturkDMC\Loca1 Settings\TemporalY Internet FiIes\Content.Outlook\VM3Y6S1l\Tailings Mgnt System and DMT
MOll Plan Nov 2010 Rv 11 1 -Redline.doc
White Mesa Mill -Standard Operating Procedures
Book 11 : Environmental Protection Manual, Section 3.1
01111 Revision: Denisonl1.1
Page 30 of49
7. Contaminated Waste Durop:_--.,;:...1-_o_o.-:;k..s_---""&-o-oJ."------__________ _
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 aiDsl for Ce1l4A and 5558.50 for Ce1l4B)? / 110 __ yes
If Cell 4A leak detection system level exceeds 12 inches above the lowest point on the bottoln flexible
membrane liner (elevation 5556.14 amsl), notify supervisor or Mill manager immediately.
C:\Documents and Settings\dturk.DMC\Local Settings\Temporary Internet Piles\Content.Outlook\VM3Y6SlI\Taillngs Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 . Redline.doc
White Mesa Mill-Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denisonl1.1
Page 28 of49
Date: l/w/ ;tc'~2...
1. Pond and Beach
elevations (msl, ft)
APPENDIX A (CONT)
DENISON MINES (USA) CORP.
WEEKLY TAaINGS INSPECTION
Cell 1: (a) Pond Solution Elevation
(b) Fl\1L Bottom Elevation 5597. __ _
(c) Depth of Water above FML (a)-(b) )-s-I-:1 J:,i:f
CeIl4A: (a)Pond Solution Elevation ~ .. l.:~qO ,,$
(b)FML Bottom Elevation ___ 5555.14_
(c)Depth of Water aboveFrv1L «(a)-(b))3 S .4?'
Ce1l4B: (a)Pond Solution Elevation Sr.1l6·1 g .
Roberts
(b)FML Bottom Elevation 5557.50
(c)Depth of Water above FML «a)-(b)) a..j .2fi
(d)Blevation of Beach Area with Highest Elevation
(monthly)
Pond: (a)Pond Solution Elevation 5b2.\.7r;:z
(b)FML Bottom Elevation ___ 5612.3_
(c)Depth of Water above FML «a)-(b)) __ q.l.;...l:J--L2.::::...-. __
2. Slimes Drain Liquid Levels Cell 2 Pump functioning properly :?c~
---!::2..::::(l>~~:;....j ..... ~",---___ Depth to Liquid pre-pump
~$_ .. ;,ii!!j.~t.;;;." .:5.W""jl;:;.;J!.,~~~----,Depth to Liquid Post-pump
(all measurements are depth-in~pipe)
31,,'f1
Pre-pump head is .' -Depth to Liquid Pre-pump = _q#5~ 37.Q7
Post-pumo head is ~' -Depth to Liquid Post-
pump= Yw6~
C:\Documents and Settings\dturk.DMC\Local Settings\Temporary futernetFiles\Content.Outlook\VM3Y6S1I\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -RedIine.doc
;'~J" ~-. , .'
""--~.
White Mesa MiU -Standard Opel'ating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denison11.1 .
Page 29 of49
3, Leak Detection Systems
Observation:
CellI Cell 2 Cell 3 Cell4A Cell4B
IsLDS wet or __ wet __ wet wet ~wet ~wet
dry? /.dry /~<iry '~ry .dry ~dty
If wet, Record ....-. Ftto "'" Ftto -Ftto \f,g Ftto ~j'1 Ftto
liquid level: Liguid Liquid Liquid Liquid * Liquid *
If sufficient Volume Volume ' Volume Volume Volume
fluid is ,aO" ... -~l1hO 3~
present, record Flow Flow Flow Flow Flow
volume of Rate Rate .."....,. Rate r Rate ~ Rate -
fluid pumped
and flow rate: /
Was fluid __ yes v no __ yes .../ no --yes~no __ yes~no ~ yes~no
sample
collected?
Observation:
New Decon Pad~ New Decon Pad! New Decon Pad
Portall Portal 2 Portal 3
Is LDS (portal) __ wet /dry __ wet~dry __ wet /dry
wet orcl!Y?
If wet, Record . ..r Ftto ..... Ftto ;-Ftto
liquid level: Liquid Liquid Ltfluid
If wet, Report to
RSO
4. Tailings Area Inspection (Note dispersal of blowing tailings):
. r~ ~
C:\Documents and Settings\dturkDMC\Local Settings\Temporary Internet Files\Content.Outlook\VM3Y6S1l\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denison 11.1
Page 30 of49
7. Contaminated Waste Dump:_-lLIo::JQ~Dl,f:\s~5~a1-!:e~t.d::::l.-______________ _
\.)
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 amsl for Ce1l4A and 5558.50 for Ce1l4B)? ~ no __ yes
If Cell 4A leak detection system level exceeds 12 inches above the lowest point on the bottoln flexible
membrane liner (elevation 5556.14 aIDsl), notify supervisor or Mill manager immediately.
C:\Documents and Settings\dturk.DMC\Local Settings\Temporary Internet Files\Content.Outlook\VM3Y6Sll\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 111 -RedJine.doc
,"" l'" 1; White Mesa Mill-Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denison 1 1.1
Page 28 of49
APPENDIX A (CONT)
DENISON MINES (USA) CORP ..
WEEKLY TAILINGS INSPECTION
1. Pond and Beach Cell 1: (a) Pond Solution Elevation 5610" ~ 2..
elevations (msI, ft)
(b) FML Bottom Elevation __ 5597 __ _
(c) Depth of Water above FML «a)-(b) __ .a..:13~.!....:$::...II;L~_
Ce1l4A: (a)Pond Solution Elevation S590 ~ S ~
(b)FML Bottom Elevation 5555.14_
(c)Deptb of Water aboveFML «a)--(b-))-' 35 69
CeIl4B: (a)Pond Solution Elevation 557g,75
(b)FIv.1L Bottom Elevation 5557.50
(c)Depth of Water above Flv1L «a)-(b)) 2=1 r 1:5
(d)Blevation of Beach Area with Highest Elevation
(montllly) AI)\
Roberts
Pond: (a)Pond Solution Elevation 56> "J.O .0=1
(b)FML Bottom Elevation ___ 5612.3_
(c )Depth of Water above Th1L « a)-(b)) ___ 7,I-IJe_7_L.{ __ _
2. Slimes Drain Liquid Levels Cell 2 Pump functioning properly
,
_.....:I3~Li;...::. .. ...IoiS~5~_,Depth to Liquid pre-pump
_----.;;:!,;.....z(,~,~5~3 __ Depth to Liquid Post-pump
(all measurements are depth-in-pipe)
'37 .. '17
Pre-pump head is D' -Depth to Liquid Pre-pump =
.:2 .. 1.2 37~97
Post~pump head is .., -Depth to Liquid Post-
pump = ~-'-J '
C:\Documents and Settings\dturk.DMC\Local Settings\Temporary Internet Piles\Content.Outlook\VM3Y6S1l\TaiIings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc
1:=>'.: ~.' •.....
$..~'I: ....
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
3. Leak Detection Systems
Observation:
CellI Cell 2
Is LDS wet or __ wet __ wet
dry? v-dry vdry
Cell 3
__ wet
~dry
o III I Revision: Denison11.1
Page 29 of49
Ce1l4A Ce1l4B
. , ,.
~wet ~wet
.Qry dI}'
If wet, Record --Ftto ~Ftto .....-Ftto 9'.:3 Ft to 1.5hFt to
liquid level: Liguid Liquid Liquid Liquid * Liquid *
If sufficient Volume Volume -Volume Volume Volume
fluid is ---~ .-Z6y~6O J~
present, record Flow Flow Flow Flow Flow
volUlne of Rate -Rate ---Rate --Rate ......--Rate ,--
fluid pumped
and flow rate:
Was fluid __ yes~no __ yes~no __ yes v'no __ yes-1L.no __ yes~o
sample
collected?
Observation:
New Decon Pad~ New Decon Pad1 New Decon Pad
Portall Porta12 Portal 3
Is LDS (portal) __ wet ~ry __ wet ~ry __ wet~dry
wet or.dry?
If wet, Record ~ Ftto .-Ftto -Ftto
liquid level: Liquid . Liquid Liquid
If wet, Report to
RSO
4. Tailings Area Inspection (Note dispersal of blowing tailings):
Cl t~ I~ti G.t'"w p(AL-e-A bUMper po.st:\ 4d)2v~ Sc:.tt\c:..M(,..A.t y1AetlA.l +-o.r-,(
It Ah,w sc...j:i:{~ tAAp.I\':'f-(W-.s wt'Cc. el4u..tA. Oh. J-bc.. wc..st ~ <!>r
t:..~tl ~.
5. Control Methods Implemented: t2.~e'lA.Lu:.l ~c..ec...-t bvtb.> QA ,wy .. t.1 ~
MW".. 'J-b., :r C1,t..U "-+Nt... D~Md\c.. 1$ 'sLt...cAl}'ub.. rQ r...o~(. .s~C)t +-ke
?=\c..vJicJ\..s C!~ t-k-e.... ~t.,..w settl~~ VV\p.M.~+e-r-S £/6-~e..b. 6 ..
6. Remarks: Lbe4A.pt( .. teA t;kv\C1(,,-O~O'.,v\. Q \ $4Mpl;~ r i.lC.A.+. kDcifle.l:eA
~lAA.vwt W\O",!\o.\y /zw SCut'\{Jii~.,
C;\Documents and Settings\dturk.DMC\Locai Settings\Temporary Internet Files\Content.Outlook\VM3Y6S1I\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 ~ Redline.doc
White Mesa Mill -Standard Operating Procedures
Book 11 : Environmental Protection Manual, Section 3.1
01111 Revision: Denisonl1.1
Page 30 of49
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 alnsl for Ce1l4A and 5558.50 for Ce1l4B)? ---tL: no __ yes
If Ce1l4A leak detection system level exceeds 12 inches above the lowest point on the bottom flexible
membrane liner (elevation 5556.14 amsl), notify supervisor or Mill manager immediately.
C:\Documents and Settings\drork.DMC\Local Settings\Temporary Internet Files\Content.Outlook\VM3Y6SlI\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc
White Mesa Mill-Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denison 11.1
Page 28 of49
Date: ;:2.-3-, ?-
1. Pond and Beach
elevations (msJ, ft)
APPENDIX A (CONT)
DENISON MINES (USA) CORP.
WEEKLY TAILINGS INSPECTION
CellI: (a) Pond Solution Elevation
(b) FIv.1L Bottom Elevation __ 5597-.". __
(c) Depth of Water above FML «a)-(b) __ .L.l Lt-L! .. ~61:..,...;~~_
Ce1l4A: (a)Pond Solution Elevation 5591. 6'1
(b)FML Bottom Elevation __ 5555.14_
(c)Deptb of Water above FML «a)-(b)) Abe 5b
Ce1l4B: (a)Pond Solution Elevation 5S78'.SI
(b)FML Bottom Elevation 5557.50
(c)Depth afWater above FML «a)-(b)) 21 .. 3\
(d)Elevation of Beach Area with Highest Elevation
(monthly) AlA
Roberts
Pond: (a)Pond Solution Elevation 561 '1,0:>
(b)Fl\1L Bottom Elevation __ 5612.3_
(c )Deptb of Water above FML «a) .. (b») __ ....IIIi6;..a .. --'7 ....... 3~·_
2. Slimes Drain Liquid Levels Cell 2 Pump functioning properly YG-J.
____ -=3=5.::::...=--=3~O~_Depth to Liquid pre-pump __ 3~b .............. __ 2-..-0<-_D.epth to Liquid Post-pump
.$uc.-It-0-.;,..... c..->... b....b~Lc.. t-s (all measurements are depth-in-pipe) wT+~ ~V'Io-tJ.-~~ ~)v'\.U ~ :37. q7
r 1 Iff' L '~ t-v. r~ pre-pu~ head is II) -Depth to Liquid Pre-pump = C' or T'V'-C-v ~ pe, ... . '? ,., -?
J ~. ~ . :>7 ... '1,
OA. 1: WO ~ a-olc...fl~ (A.. , Post-pump head is 5i' -Depth to Liquid Post-
-\-~+ +-;~e-~ +Vr~ pump= ,.77
l 4-b~c...lc-t-o ~o SeJ t-~l.-
Pv M.. (J woveuL V\t:' +-t>v" v\.. vPf.
I C:\Documents and Settings\dturk.DMC\Local Settings\Temporary Internet Flles\Content.Outlook\VM3Y6S ll\Tailings Mgnt Syste'
Mon Plan Nov 2010 Rv 11 1 -Redline.doc · ,<' rt"·
{
1 I
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
3. Leak Detection Systems
Observation:
CellI Ce112
Is LDS wet or __ wet wet
dry? ~dry ~dry
Cell 3
__ wet
~ dry
01111 Revision: Denisonll.1
Page 29 of49
Ce114A Ce1l4B
~wet /wet
-dry dry
If wetJ Record .-Ftto -Ftto -' Ftto 9 .. 9 Ftto \.,51. Ft to
liquid level: Liquid Liquid Liquid Liquid * L!guid *
If sufficient Volume Volume' Volume Volume Volume
fluid is ---U~L.160 3~
presen t, record Flow Flow Flow Flow Flow
volume of Rate -Rate -Rate -Rate -Rate -
fluid pumped
and flow rate:
Was fluid __ yesLno __ yes~no __ yes~no __ yeS-L-no __ yes--L:no
sample
collected?
Observation:
New Decon Pad~ New Decon Pad= New Decon Pad
Portal 1 Portal 2 Portal 3
Is LDS (portal) __ wet ~dry __ wet~dry _~wet~dry
wet or dry?
If wet, Record ---Ftto --Ftto ---Ftto
liquid level: Liquid Liquid Liquid
If wet, Report to
RSO
4. Tailings Area Inspection (Note dispersal of blowing tailings): ~"'+-t ; .... c>(" w t ~ c,~ wc:"re
c-A. C>~ t:. ~~flL.tc..A \ k ~~ r If"\-olL-f'f..(,.. c..v..c.c;...~.
Cot.-J.5 (:z:.ve-A,S) a..rc.. ~OW i~. ~c... ~OA:t-,...~~ o..."r-~t>.-V\.or-+,~ 0 ~ fl""ofv +-) ,..~~ .-~~\--c"-LCA is "OA.4-'~~i~ ....., >e.per~+e.-~ro~ ~~ tA.~, P;c.,..\-Vtc,S
WG.I""c.. +-~""'~ ~ we~ rc.p(X-+~ t-~ ~C» Sl>-ff:" ,~ltl ~~a.
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
7. Contaminated Waste Dump: LcoQ t...s 0:C20 ~
01111 Revision: Denison11.1
Page 30 of 49
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 runsl for Ce1l4A and 5558.50 for Ce1l4B)? ~no __ yes
If Cell 4A leak detection system level exceeds 12 inches above the lowest point on the bottOln flexible
membrane liner (elevation 5556.14 amsl), notify supervisor or Mill manager immediately.
C:\Documents aJld Settings\dturk.DMaLocal Settings\Temporary Internet Files\ContentOutlook\VM3Y6SlI\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 ~ Redline,doc
White Mesa Mill -Standard Operating Procedures 01111 Revision: Denison 11.1
Page 28 of49 Book 11: Environmental Protection Manual, Section 3.1
Date: A / Ie /.2.0 )2
1. Pond and Beach
elevations (msI, ft)
APPENDIX A (CONT)
DENISON MINES (USA) CORP.
WEEKLY TAILINGS INSPECTION
Celll: (a) Pond Solution Elevation
(b) FML Bottom Elevation __ ~5597 __ _
(c) Depth of Water above FML «a)~(b)) ---.:..l-.:.Lt~. ':t-~~ __
Ce114A: (a)Pond Solution Elevation $ 59 , . 9 5
(b)FML Bottom Elevation ___ 5555.14_
(c)Deptb of Water above FML «a)-(b)) 5'. g I
CeIl4B: (a)Pond Solution Elevation 557H, XC
Roberts
(b)Fl\1L Bottom Elevation 5557.50
(c)Depth of Water above FML «a)-(b)) eU .;:)
(d)Elevation of Beach Area with Highest Elevation
(monthly)
Pond: (a)Pond Solution Elevation 5{,lQ.3\
(b)FJv1L Bottom Elevation ___ .5612.3_
(c)Depth of Water above FML «a)-(b)) _......J'1!....L.()~1 ~ __
2. Slimes Drain Liquid Levels Cell 2 Pump functioning properly 'ie, S
_3~5'-C.., .=b~~~ __ .Depth to Liquid pre-pump
__ 3~'~. b ....... l _____ Depth to Liquid Post-pump
(all measurements are depth-in-pipe)
'3.1.q1
Pre-pump head is II' -Depth to Liquid Pre-pump:;:
~.$a. ')1.'\1
Post-pump head is .' -Depth to Liquid Post-
pump = 1.3b
C:\Documents and Settings\dturk.DMC\Laca1 Settings\Temporary Internet FiIes\ContentOutlook\VM3Y6SII\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rvll 1 -Redline.doc
~} .. , ~.---' ..
~"~, ..
White Mesa Mill-Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denison11.1
Page 29 of49
3. Leak Detection Systems
Observation:
CellI Cell 2 Cell 3 Ce1l4A Cell4B
Is LDS wet or __ wet wet __ wet ~wet ~wet
dry? / QI1'_ --::;r /dry .dry dry -dry
If wet, Record -Ftto Ftto Ft to '1, , Ftto jl~ Ftto --liquid level: Liquid Liquid Liquid Liquid * Liquid *
If sufficient Volume Volume ' Volume Volume Volume
fluid is .... .... .".. ~'YYkO JK
present, record Flow Flow Flow Flow Flow -volume of Rate Rate -Rate -Rate 0 Rate 0
fluid pumped
and flow rate:
Was fluid __ yes V no __ yes ~no __ yes ~no __ yes~no __ yes---.£..no
sample
collected?
Observation:
New Decon Pad2 New Decon Pad! New Decon Pad
Portal 1 Porta12 Portal 3
/ ./
Is LDS (portal) _~wet ../dry __ wet /dry __ wet~dry
wet or dry?
If wet, Record -Ftto ,.. Ftto -Ftto
liquid level: Liquid Liquid Liquid
If wet, Report to
RSO
4. Tailings Area Inspection (Note dispersal of blowing tailings); t: ~rc ;:;t~ \o.\p ~~ccl. *' blad~.l.~+a1 .~ So"'4-
C:\Documents and Settings\dturk.DMC\Local Settings\Temporary Intemet Files\Conrent.Outlook\VM3Y6SlI\Tailings Mgnt System and DMT
Moo Plan Nov 2010 R v 11 1 -Redline.doc
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01/11 Revision: Denison 1 1.1
Page 30 of49
7. Contaminated Waste Dump: __ l..:....l;1o=-~.....;:::..~(,.L..rb/IU.b"'-"'.c\+-, _____________ ~ __
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 amsl for Ce1l4A and 5558.50 for Ce1l4B)? ,/ no __ yes
If Ce1l4A leak detection system level exceeds 12 inches above the lowest point on the bottom flexible
membrane liner (elevation 5556.14 amsl)~ notify supervisor or Mill manager inunediately.
C:\Documents and Settings\dturk.DMC\Local Settings\Temporary Internet Files\Content.Outlook\VM3Y6S1l\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 ~ Redline.doc
-White Mesa Mill-Standard Operating Procedures 01/11 Revision: Denison 11.1
Page 28 of49 Book 11: Environmental Protection Manual, Section 3.1
Date: 2/ 11/~c\c2
1. Pond and Beach
elevations (msl, ft)
APPENDIX A (CONT)
DENISON MINES (USA) CORP.
WEEKLY TAILINGS INSPECTION
CellI: (a) Pond Solution Elevation 5Coll·76
(b) FML Bottom Elevation 5597 __ _
(c) Depth of Water above FIv1L «a)-(b))~==)-..JY~ -1-' 1~Q..-=-__
Ce1l4A: (a)Pond Solution Blevation SS9~.LJJ
(b)F1v1L Bottom Elevation ___ 5555.14~
(c)Depth of Water above FML «a)-(b)) 37.>3
Ce1l4B: (a)Pond Solution Elevation SS755.gj
Roberts
(b)FM:L Bottom Elevation 5557.50
(c )Depth of Water above FML «( a) .. (b)) a...l.39
(d)Elevation of Beach Area with Highest Elevation
(monthly)
Pond: (a)Pond Solution Elevation S0 ,~. q 8'
(b)FMLBottomElevation __ -.5612.3-
(c)Depth of Water above Th1L «a)-(b» _...:oCa~b.=iS:.---__
2. Slimes Drain Liquid Levels Cell 2 Pump functioning properly Y'(; s...
__ '3._S_.S_· _, __ Depth to Liquid pre-pump
__ · ...... 3~7~ ......... ()o...=:;l.."'-""--___ Depth to Liquid PostRpump
(all measurements are depth-in-pipe)
31.91
Pre-pump head is ~'-Depth to Liquid Pre-pump =
~.Li.b 37,q1
Post-pump head is ~ -Depth to Liquid Post-
pump= ·95
C:\Documents and Settings\dturk.DMC\Loca1 Settings\Temporary Internet FJ.1es\Content.Outlook\VM3Y6S1I\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denison 11.1
Page 29 of49
3. Leak: Detection Systems
Observation:
CellI Cell 2 Cell 3 Ce1l4A CeIl4B
Is LDS wet or ~wet ~wet wet ~wet ../wet
dry? dry .dry --:?dry .dry dry
If wet, Record -Ftto -Ftto -Ftto 10.9 Ftto .,47 Ftto
liquid level: Liquid Liquid Liquid Liquid * Liquid *
If sufficient Volume Volume ' Volume Volume Volume
fluid is ---~t1'i.bO JK
present, record Flow Flow Flow Flow Flow
volume of Rate -Rate ,-Rate -Rate -Rate -
fluid pumped
and flow rate:
Was fluid __ yes~no __ yes Lno __ yes~no __ yes /no __ yes~no
sample
collected?
Observation:
New Decon Pads New Decon Pad1 New Decon Pad
Portal 1 Portal 2 Portal 3
/ / /
Is LDS (portal) __ wet ./ dry __ wet ../ dry __ wet"" dry
wet or dry?
If wet, Record -Ftto --Ftto r Ftto
liquid level: L~quid Liquid Liquid
If wet, Report to
RSO
4. Tailings Area Inspection (Note dispersal of blowing tailings):
K ~
5. Control ~ethods Implemented: Ro~~ ~<:<:J. +0 0r~ ....... \,'H-J~ If'p(, then Dced. 10 b, bt:J,d
1!rz..!\$.Gr \"" {rem edt ~ ~ h c.dl Ij 8 ,~ "OW \(\ ~p~("h~ .. '
6. Remarks: :'-kdcJ.. I'" G>" "c-t,r , £r,. wJ, .:>Jec ~ pf:j 71:" iIl""k. '&ipa;cc~ rv1c,jl\lt-fY'I<~O\t ~$.I~ 0(\ DR-~1
C:\Documents and Settings\dturkDMC\LocaI Settings\Temporary IntemetFiles\Content.Outlook\VM3Y6Sll\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denisonl1.1
Page 30 of49
7. Contanunated Waste Dump: __ l-_o_o_~_!:.. __ (r_o_c>_J. _____ ~ _________ _
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 amsl for Ce1l4A and 5558.50 for Ce1l4B)? L no __ yes
If Ce1l4A leak detection system level exceeds 12 inches above the lowest point on the bottom flexible
membrane liner (elevation 5556.14 amsl)) notify supervisor or Mill manager immediately.
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Mon Plan Nov 2010 Rv 11 1 ~ Redline.doc
White Mesa Mill-Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denison 11.1
Page 28 of 49
1. Pond and Beach
elevations (msI, ft)
APPENDIX A (CONT)
DENISON MINES (USA) CORP.
WEEKLY TAILINGS INSPECTION
Cell 1: (a) Pond Solution Elevation
(b) FIv1L Bottom Elevation ___ .5597 __ _
(c) Depth of Water above FML «a)-(b» _...---J..}y~.,-"""S~K~_
Ce1l4A: (a)Pond Solution Elevation Ie 55 ~~)i<j(
(b)FML Bottom Elevation ___ ,5555.14_
(c)Deptb of Water above FML «a)-(b» '$1.0:1
Ce1l4B: (a)Pond Solution Elevation
Roberts
(b)FML Bottom Elevation 5557.50
(c)Depth of Water above FML «a)-(b) a-l ~'i
(d)Elevation of Beach Area with Highest Elevation
(monthly)
Pond: (a)Pond Solution Elevation S~ 19.'?';?'"
(b)FML Bottom Elevation ___ 5612.3_
(c )Depth of Water above FML «a)-(b») _----ll.e~, 91,;...2.-==-----·_
2. Slimes Drain Liquid Levels Cell 2 Pump functioning properly Ye s.
_~=~=." ·:;;.:..,.~-=-O ___ ~Depth to Liquid pre-pump
---"'?::>_J"-l. • ..Io.oO'--9>---___ ,Depth to Liquid Post-pump
(all measurements are depth-in-pipe)
31.'\1
Pre-pump head is J8'-Depth to Liquid Pre-pump =
)..f.:,1 $7,'1'1
Post-pump head is R' -Depth to Liquid Post-
pump = l'i 1(&
C:\Documents and Settings\dturk.DMC\Local Settings\Temporary Internet Files\ContentOutlook\VM3Y6S 1l\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Red line. doc
y • ....
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01/11 Revision: Denison 11 .1
Page 29 of49
3. Leak Detection Systems
Observation:
Is LDS wet or
dry?
If wet, Record
liquid level:
If sufficient
fluid is
present, record
volume of
fluid pumped
and flow rate:
CellI
wet -:TdlY
-Ftto
Liquid
Volume
Flow
Rate_-' __
Cell 2
wet ~dry
---=_=---_F.t to
Liquid
Volume '
Flow
Rate .----
Cell 3
wet
./ dry
-Ftto
Liquid
Volunle
Flow
Rate. __ -~
Ce1l4A
/
~wet
dry
L.5 Ftto
Liquid *
Volume
;;2. b'1 '-\bb
Flow
Rate_-__
Cell4B
115.2. Pt to
Liquid *
Volume
3&
Flow
Rate_"-__
Was fluid
sample
collected?
__ yes~no __ yes~no __ yes~no __ yes.---£no __ yes~no
Observation:
New Decou Pads New Decon Pad!
Portall Portal 2
'" Is LDS (Portal) __ wet~dry __ wet ./dry
wet or dry?
If wet, Record -Ftto , Ftto
liquid level: Liquid Liquid
If wet, Report to
RSO
4. Tailings Area Inspection (Note dispersal of blowing tailings):
~D(A.;, 0-\: tl-k rYh",aJ~furo~~ov-t +k -.J<!e\(,
New DecoD Pad
Porta13
--wet~dry
,.. Ftto
L!guid
5. Control Methods Implemented: 1"1:.;+.;\;+,, £.C~w £l\J'1 bl~:Qj ssoo-t.l..s.. \A~l\,'tJ Uc~ o"-t
po.;ntia bU.Mpif p",st!l Mt.U4\4. ><:.\Jrr1h0 eJmon:tar,
6.
C:\Documents and Settings\dturkDMC\Local Settings\ Temporruy Internet Files\Content. Outlook\ VM3Y6S lI\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 • Redline.doc
White Mesa Mill -Standard Operating Procedures
Book 11; Environmental Protection Manual, Section 3.1
01111 Revision: Denison 1 1.1
. Page 30 of 49
7. Contaminated Waste Dump:_....J·IIo!:. ... ..!l'>Q..a.·~.=.>L--.J.,.J(T:.u.M=)(-"-\ ____ ~ ___________ _
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 runsl for Ce1l4A and 5558.50 for Cell4B)? -.L no __ yes
If Cell 4A leak detection system level exceeds 12 inches above the lowest point on the bottom flexible
membrane liner (elevation 5556.14 amsl), notify supervisor or Mill manager inunediately.
C:\Documents and Settings\dturk.DMC\Local Settings\Temporary Internet Files\Content.Outlook\VM3Y6SlI\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc
/1
;/ "
i' / /
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denison 11.1
Page 28 of49
Date: "?)/'J,./;?"O \4.
1. Pond and Beach
elevations (msl, ft)
APPENDIX A (CONT)
DENISON MINES (USA) CORP.
WEEKLY TAaINGS INSPECTION
Cell 1: (a) Pond Solution Elevation 56H. 67
(b) FML Bottom Elevation __ 5597 __ _
(c) Depth of Water above FML «a)-(b)) _--......Jll-y~f:.K..6-:.7 __
Ce1l4A: (a)Pond Solution Elevation 5511 .. 13
(b)FML Bottom Elevation ___ 5555.14_
(c)Depth of Water above F1VfL «a)-(b)) 3 6. C, q
Ce1l4B: (a)Pond Solution Elevation 5579. <67
Roberts
(b)FN1L Bottom Elevation 5557.50
(c )Deptb. of Water above FML « a)-(b)) "22 « .3 7
(d)Elevation of Beach Area with Highest Elevation
(monthly)
Pond: (a)Pond Solution Elevation .5ilD.OJ-
(b)FML Bottom Elevation 5612.3_
(c) Depth of Water above FML «a)-(b») =~~~........j-1t....:::.;.......7,--,2M.,.·,--
2. Slimes Drain Liquid Levels Cell 2 Pump functioning properly ~ (j
-:::~..:..S~'Y..a..:~=-___ Depth to Liquid pre-pump
--"=3=-1"-'-(......;;O_\~ __ --'Depth to Liquid Post-pump
(alllueasurements are depth-in-pipe)
'3/.q1
Pre-pump head is 18' -Depth to Liquid Pre-pump =
t2....SLJ ~l.c-ll
Post-pump head is M}' -Depth to Liquid Post-
pump = . tk,
C:\Documents and Settings\dturk.DMC\Local Settings\Temporary Internet F'lles\Content.Outiook\VM3Y6S Il\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc .
/"). ~~" .. ' .
~-
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
3. Leak Detection Systems
Observation:
Is LDS wet or
dry?
CellI
wet ~dry
Cell 2
__ wet
./~
Cell 3
wet
:/dry
01111 Revision: Denisonll.l
Page 29 of 49
Cell4A
~wet
dry
Ce1l4B
L . ~wet
.dry
If wett Record
liquid level:
__ -__ .Ftto
Liguid
-Ft to
Liquid
-Ftto
Liquid
n ·Lj Ft to
Liquid *
t'..?~ Ftto
L~quid *
Vogame Volume ' Volume Volume 38 If sufficient
fluid is
present, record
volume of
fluid pumped
and flow rate:
Flow
Rate __ -_
Flow
Rate_-__
Flow _
Rate __ _
Volume
.2W-\l-lbO
Flow
Rate~~ __
Flow
Rate~ __
/
Was fluid
sample
collected?
__ yes~no __ yes v' no __ yes~no __ yes-.Lno __ yes~no
Observation:
New Decon Pad! New Decon Pad~ New Decon Pad
Portall Portal 2 Portal 3
L /'
Is LDS (Portal) __ wet~dry __ wet v dry __ wet v'dry
wet or dry?
If wet, Record ~ Ftto Ft to .--Ft to ,
liquid level: Liquid Liquid Liquid
If wet, Report to
RSO
4. Tailings Area Inspection (Note dispersal of blowing tailings):
Ro<A.d..s ~~;" I"'wM(j J.~ to pc~c.:plf",-+/~r'\!
6. Remarks: f1{\!;,h~l' i i!1\ Q~r\r CI'OtN\J ~;-d"\ Shot e'k"£i\t;[)l\)c/\ .$c+~c.rr1<!".tt+joI'\C"'~}os~,
flni:JyA Monthb Aept~ lhcds Cs:hIDCoRcn) t
C;\Documents and Settings\dturk.DMC\Local Settings\Tempof8.lY Internet FHes\Content.Outlook\ VM3Y6S 1I\Tailiogs Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denison 1 1.1
Page 30 of49
7. Contaminated Waste Dump:_=l~f>o~\,{~:;-~..;::&:;.....;I1~c>(;;.:...:l ________________ _
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 amsl for Ce1l4A and 5558.50 for Ce1l4B)? _1/_ no __ yes
If Cell 4A leak detection system level exceeds 12 inches above the lowest point on the bottom flexible
membrane liner (elevation 5556.14 amsl), notify supervisor or Mill manager immediately.
C:\Documents and Settings\dturk.DMC\Local Settings\Temporary Intemet Files\Content.OutIook\VM3Y6SlI\Tailings Mgnt System and DMT
Mon Plan Nov 2010 R v 11 1 \ • Redline.doc
White Mesa Mill-Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denisonll.l
Page 28 of49
Date:_ 31 tI L;;.O l~
1. Pond and Beach
elevations (msl, ft)
APPENDIX A (CONT)
DENISON MINES (USA) CORP.
WEEKLY TAILINGS INSPECTION
Inspectors: --r;;:-n n e (' UD 1/ "dJ I 6-",(f'!'" Po. 1m cf"
Cell!: (a) Pond Solution Elevation 5'1I,..$l
(b) FML Bottom Elevation 5597~ __
(c) Depth of Water above FML «a)-(b ))-......,,\~j' . 5~ ~
CeIl4A: (a)Pond Solution Elevation o5Cf~ ,ID
(b)FML Bottom Elevation __ ~.5555.14_
(c)Depth of Water above FML «a)-(b»), ..3~¥qk
Cell 4B: (a)Pond Solution Elevation 5;\t<o.Db
Roberts
(b)FML Bottom Elevation 5557.50
(c)Depth of Water aboveFML «a)-(b») .2,~-.5b
(d)Elevation of Beach Area with Highest Elevation
(monthly)
Pond: (a)Pond Solution Elevation -Sc, I q .ID
(b)FML Bottom Elevation ___ 5612.3_
(c)Depth of Water above FML «a)-(b») _-7../..-+-1 -1..1..-_"_
2. Slimes Drain Liquid Levels Cell 2 Pump functioning properly ~e$ > •
,Jot o--b\e +0 perVorY'1
~~4-J\Ae-.to th~
Q~ell~ 'Reco\)e'j
Icst
_______ ,Depth to Liquid pre-pump
_______ Deptb to Liquid Post-pump
(all measurements are depth-in-pipe)
Pre-pump head is 38' -Depth to Liquid Pre-pump =
Post-pump head is 38' -Depth to Liquid Post-
pump= __ _
C:\Docuruenfs and Settings\drurk.DMC\Local Settings\Temporary Internet FUes\Content.Outlook\VM3Y6S1l\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc
/.~), ~::' : .....
,~
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
3. Leak Detection Systems
Observation:
Cell! Cell 2
IsLDS wet or ~wet wet
dry? '.' dry ~ -~
If wet, -Record Ftto Ftto
liquid level: Liquid Liquid
If sufficient Volume Volume '
fluid is -.,.".
present, record Flow Flow
volume of Rate .... Rate -"'"
fluid pumped
and flow rate: /' L
Was fluid __ yes ~no __ yes J no
sample
collected?
Observation:
Cell 3
~et
..........
Ftto
Liquid
Volume ...
Flow
Rate .....-
__ yes ./ 110
01111 Revision: Denison 11.1
Page 29 of 49
Cell4A Ce1l4B
/ L
~wet " __ wet
.dry dry
~~I Ftto .'11 Ftto
Liquid * Liquid *
Volume Volume
:Lb,=Plb1 1-\3
Flow Flow
Rate --Rate -
/
-yes~no __ yes _..{ no
New Decon Pad2 New Decon Pada New Decon Pad
Portal 1 Portal 2 Portal 3
/ '" /
Is LDS (portal) __ wet ../ dry __ wet /dry __ wet -"/ dry
wet or dry?
If wet, Record -, Ftto ~ Ftto ........ Ftto
liquid level: Liguid Liquid Liquid
If wet, Report to
RSO
C:\Documents and Settings\dturk.DMC\Local Settings\Temporary Internet Files\Content.Outlook\VM3Y6Sll\Tallings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 -Redline.doc
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
01111 Revision: Denisonl1.1
Page 30 of 49
7. Contaminated Waste Dump:--tk=o=-=o=-k~s~.J-&L.!:{)O~J ________ ~ _____ _
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 amsl for Ce1l4A and 5558.50 for CeIl4B)? /' no __ yes
If Cell 4A leak detection system level exceeds 12 inches above the lowest point on the bottom flexible
membrane liner (elevation 5556.14 amsl), notify supervisor or Mill manager immediately.
C;\Documents and Settings\drurk.DMC\Local Settings\Temporary Internet Files\Content.Outlook\VM3Y6SlI\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 11 1 • Redline.doc
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
2112 Revision: Denisonl1.5
Page 33 of 55
1. Pond and Beach
elevations (msl~ ft)
APPENDIX A (CONT)
DENISON MINES (USA) CORP.
WEEKLY TAILINGS INSPECTION
CellI: (a) Pond Solution Elevation .5611.53
(b) FML Bottom Elevation __ 5597~ __
(c) Depth of Water above FML «a)-(b» ___ 1.....14 ...... 5_· ...... 8 __
Ce1l4A: (a)Pond Solution Elevation "'59 1 r9 g
(b)FML Bottom Elevation __ ,5555.14_
(c)Depth of Water above FML «a)-(b» 3b!fM
Ce1l4B: (a)Pond Solution Elevation ., ,£580 3D
Roberts
(b )FML Bottom Elevation 5557.50
(c )Depth of Water above FML «a)-(b» & 1. ~ 0
(d)Elevation of Beach Area with Highest Elevation
(monthly) NA
Pond: (a)Pond Solution Elevation 5"'. ;60
(b)FML Bottom Elevation __ 5612.3_
(c )Deptb of Water above FML «a)-(b» ~~"""!!b~' .~lf.:1...-~
2. Slimes Drain Liquid Levels Cell 2 Pump functioning properly L
_---"> __ 5_'·· "-'~ 6",,-° s_-''---_.Depth to Liquid pre-pump
~_. _3 '-;!1;6.. .... ' r:""""J,.",*,J __ Depth to Liquid Post-pump
(all measur~ments are depth-in-pipe)
Pre-pump head is 37.97'~Depth to Liquid Pre-
pump =:: 2 .. 3'6
Post-pump head is 37~97' -Depth to Liquid Post-
pump=:: L;~6
C~\D«OO:~fJl$J MdSenEiniMtr'kJ'MCU..la.S.etCings\Tem~f11JY fuJe:me1. E~~(lIp'MlM:3.y§S'ilmMI ,Pr1mR~k!ll~.~~2 Rgrv 1.1 5
~_~M?T f31\ili~~:Jl~1J'flem 00,*'.1.2 .ReA~·tft;~t~~~I*i}!i$'111~~~a~m:~~oo.OO,12 :Re('
U~t'-P.t~~~12Re:\f 11..:) ieEttiRe~~ae
White Mesa Mill-Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
3. Leak Detection Systems
2/12 Revision: Denison 1 1.5
Page 34 of 55
(Same data as Daily Inspection Fonn. Record data on daily form).
Observation:
New Decon Pad, New Decon Pad3 New Decon Pad
Portal 1 Portal 2 Portal 3
Is LDS (Portal) __ wet /dry __ wetL dry __ wet....J.L"dry
wet or dry?
If wet, Record -Ftto -Ftto ."". Ftto
liquid level: L~uid Liquid Liquid
If wet, Report to
RSO
4. Tailings Area Inspection (Note dispersal of blowing tailings):
t)'i;~e.rJjQA. rtil,j..,,,u . ~~r4. ,""PlvA. evil £'4" ,+4« L.A.,!' ~ tt'(6pr''Y "..e:rt"p1'-A.Ml ~tA.,
J1 6Dt b4~ S'tpt ,..J.." ?Mr"J\ I (tL\(. ;6. tre.wfv \ *4(. £~!\Me L,c.U L.
5.
L~~~ 1"'-+,...~fe:-1:A..(... W~S t"e.fc-t"-I-eA ,Xt:
( .......... ~
• ..• ..,1
Tv,....~
6. Remarks:t:p.-.,.eJg.juL AM&+b l-j fi.U J:Q.M~d~~'f Gonu...teA 'i}l'·ffotw ,wt1d er 'sJ?jLfI!!tp "".,L &" .... oo.LA"""'f-(!~l ,_iy,'i&g;jl.".., ,....1.iP·· ~U'JI;.~, ,:;""r.t-_U'"=--l+1_·....t.t:....Lr~.!8_·· ~u&· ......i!ooralil/O.W~.· ...... IIUlltJ;..:I!.:;;:..,.CJr·_1~A_$,1.0L<"'-, ....,.;~;;.,;()...;;",.t_er __ ..!!w::;;;, ,..~i£!7e:.;A.. __ ..:E:k..~,;;."i;;IoSib.-""",b"",' '!/i;!t;!'~e.A. ih,,..f· fr> ~~ep ~u.s I o\.ow
7. Designated Disposal Area for Non-Tailings Mill Waste (awaiting DRC approval)
L-oc ~j ("..p(>+~
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 amsl for Ce114A and 5558.50 for Ce1l4B)? ~ no __ yes
If Cell 4A leak detection system level exceeds 12 inches above the lowest point on the bottom flexible
membrane liner (elevation 5556.14 amsl), notify supervisor or Mill manager immediately.
C-IDtf~mem~)I.W!1 s«mgs\dWtij:d)MQ1.peaJ Seltffi&ii'(ummM:aQ!' [nmol$!,fW.s.\Co;m.·OI.moo1:.1YM;3Y6S1ml,\f.f ,Paarw_!'®li!m!,l :rota. R~ tl~
~IDMTPWRMl'·Plali!)~.~y 11.a;p.J4CfiM ffl1?fI;i@W:51A]!2.R!v Jl,~;~WF-Plaffl.DM1!~~.49,I2.~
~t:.-~Pekoot'Y ~12. Re~';;';}.k~liae~doo
' .. ~')
White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
2/12 Revision: Denison 11.5
Page 33 of 55
Date: 3/~ / ;2.oQ
1. Pond and Beach
elevations (msl, ft)
APPENDIX A (CONT)
DENISON MINES (USA) CORP.
WEEKLY TAILINGS INSPECTION
CellI: (a) Pond Solution Elevation 5'=.11.54
(b) FML Bottom Elevation ____ 5597 __
(c) Depth of Water above FML «a)-(b» _--,-lY4.,:.._Sy..9 __
Ce1l4A: (a)Pond Solution Elevation .554 I. ~
(b)FML Bottom Elevation __ 5555.14_
(c)Deptb of Water above FML «a)-(b») 3f-..5 \
Ce1l4B: (a)Pond Solution Elevation sSKb.t..tk
Roberts
(b )FML Bottom Elevation 5557.50
(c)Deptb of Water above FML «a)-(b» ;:?.2 4f
(d)Elevation of Beach Area with Highest Elevation
(monthly)
Pond: (a)Pond Solution Elevation .5 ~ I q. 50
(b)FML Bottom Elevation ___ 5612.3_
(c)Deptb of Water above FML «a)-(b» __ 7""--',.=.2.""---__
2. Slimes Drain Liquid Levels Cel12 Pump functioning properly Ve $.
_~';;;='..J..Zl 1_5..r...-__ ,Depth to Liquid pre-pump
_3~'=:-'....:7;.;;:5~ __ Depth to Liquid Post-pump
(all measurements are depth-in-pipe)
Pre-pump head is 37.97'-Depth to Liquid Pre-
pump = ~ .~.:z
Post-pump head is 37.97' -Depth to Liquid Post-
pump= }.~
C:\Documellts and Settings\dturk.DMC\I.ocaJ Settings\Temporary Internet Files\Content.OutJookWM3Y6SIIIDMT Plan February 2012 Rev I) 5
cJean.docl\l:\DMT PlaRW~H PlftR 00.29.12 Rev 11.5\DMT Pian Fe~fUary 2Ql2 Rev 11.5 e1eafujee~J:\DMTPIan\DMT P1M Q2.29.t2 Rev
11.5\DMT Pbm Pebmary 2912 Re'l 11.5 redlifle.:Elee
White Mesa Mill-Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
3. Leak Detection Systems
2112 Revision: Denison 1 1.5
Page 34 of 55
(Same data as Daily Inspection Fonn. Record data on daily form).
Observation:
New Decon Pad~ New Decon Pad! New Decon Pad
Portall Porta12 Portal 3
Is LDS (Portal) __ wet~dry ~_wet if dry __ wet /dry
wet or dry?
If wett Record -Ft to -Ftto -Ft to
liquid level: Liquid Liquid Liquid
If wet, Report to
RSO
4. Tailings Area Inspection (Note dispersal of bIO!ing tailings):
,&004$ hClve been hltAd e4 10 -tb, ge~n'c trJ a11=1l a-nd s.onr0f1{6, '-0 rrlrlJ}J~!t R~~.
-("..:\11'::] h,"t:.~ wo~s ('~"'-\ ~ooa. \)c:.. bc,..J .... bet Q... AM ~1-cr "p~) 0,..., ±h~fOJ"j.~. ,;Ii
5.
6.
7. De~ignated Pisp~sal Area for Non-Tailings Mill Waste (awaiting DRC approval)
~0S2'K.5 &~tJa .
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 amsI for CeIl4A and 5558.50 for Ce1l4B)? -.L no __ yes
If Cell 4A leak detection system level exceeds 12 inches above the lowest point on the bottom flexible
membrane liner (elevation 5556.14 amsl), notify supervisor or Mill manager immediately.
Q~\D«:tlmepts md S!m·~dcDMQIRRii Seqmgs\IemppmnrIn~6~R!!l.O~3Y6SUWMT PiM &bmpy m12lkf II 5
aD~'fT ft. @t.yr19'>li 6iw 'I 114m" Ply ~.,:;:fl'2 Am 1'4' ..,.eNi\n:MT Pk.R\G).EIt,iT~;r».L3 Jti!'!
Ili~MT ~~1001'2~ I'LjrtiJilI~~.dl!ll!e
White Mesa Mill -Standard Operating Procedures
Book 11; Environmental Protection Manual, Section 3.1
01111 Revision: Denison1l.1
Page 30 of49
7. Contaminated Waste Dump: __ LIe...!.I""Q.u.\<'.=..5.L-..I.J(Tu;;,.e=rJ,~l ________________ _
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 amsl for Ce1l4A and 5558.50 for Ce1l4B)? -L no __ yes
If Cell 4A leak detection systeln level exceeds 12 inches above the lowest point on the bottom flexible
membrane liner (elevation 5556.14 amsl), notify supervisor or Mill manager immediately_
C;\Documents and Settings\dturk.DMC\Local Settings\Temporary Internet Files\Content.OutlookWM3Y6SlI\Tailings Mgnt System and DMT
Mon Plan Nov 2010 Rv 111 ~ Redline.doc
/.~,-)." .. . ,
. '~
'" .) '. ,,,.;;,so'
White Mesa MiIl-Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3.1
2112 Revision: Denisonl1.5
Page 33 of 55
Date: 3/30/2D\.2.
1. Pond and Beach
elevations (mst, ft)
APPENDIX A (CONT)
DENISON MINES (USA) CORP.
WEEKLY TAILINGS INSPECTION
Cell 1: (a) Pond Solution Elevation
(b) FML Bottom Elevation ___ .5597 __ _
(c) Depth of Water above FML «a)-(b» _--+} ...... Y..:.:::. 5::..9.J...-_
Ce1l4A: (a)Pond Solution Elevation 5~q . -:; 1
(b)FML Bottom Elevation __ 5555.14_
(c)Depth of Water above FML «a)-(b» .3f., '7
CeIl4B: (a)Pond Solution Elevation 5$80.75
Roberts
(b )FML Bottom Elevation 5557.50
(c)Depth of Water above FML «a)-(b» ~.2..~
(d)Elevation of Beach Area with Highest Elevation
(monthly)
Pond: (a)Pond Solution Elevation ':"b Vi . 5~
(b)FML Bottom Elevation __ 5612.3_
(c )Deptb of Water above FML «a)-(b» _---.;.'1.-;;, ~~:.....--_
2. Slimes Drain Liquid Levels Cell 2 Pump functioning properly ~e$
__ :\S~.,.=~:......:.l ___ Depth to Liquid pre-pump
_...::.'3~b~._X,-=O:.-.... __ Depth to Liquid Post-pump
(all measurements are depth-in-pipe)
Pre-pump head is 37.97' -Depth to Liquid Pre-
pump = ::;.. ·G/,.,
Post~pump head is 37.97' -Depth to Liquid Post-
pump = J. j7
C:\Documents and Settings\drnrk.DMC\LocaI Settings\Temporary Internet FHes\ContentOutJookWM3Y6SU\DMT Plan February 2012 Rev 11 5
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11.3\D~{T Plan Feeruary 2Q J 2. Re'! 11.5 redJine.Elee
-White Mesa Mill -Standard Operating Procedures
Book 11: Environmental Protection Manual, Section 3,1
3. Leak Detection Systems
2/12 Revision: Denison 1 1.5
Page 34 of 55
(Same data as Daily Inspection Form. Record data on daily form).
Observation:
New Decon Pad2 New Decon Pad2 New Decon Pad
Portall Portal 2 Portal 3
Is LOS (Portal) __ wet ~dry __ wet~dry __ wet ./dry
wet or dry?
If wet, Record -Ftto -Ftto .-Ft to
liquid level: Liquid Liquid Liquid
If wet, Report to
RSO
4. T~,ling~ Are~ Inspection ,(Note dispersal of blowing tailings):. ~.I
U';"l)!!:!& {,£Oa h,,~ (j"ud:.¢..-Attrpy;;d, ~4 ~t'[fb .of\ ... yr.:,,..). $lll.{ J; Gq,i.'3,~ ,?ro...irJ~ J,,:;}s
yi'Cr ~of;XH,~ V p$g:r 1:g ~l~ 1. _ :1A~1i~ AreA L¢}A-&!JcA\.
6.
7. Designated Disposal Area for Non-Tailings Mill Waste (awaiting ORe approval)
Loo\(\ Cr.,cd
* Does Level exceed 12 inches above the lowest point on the bottom flexible membrane liner (solution
elevation of 5556.14 amsl for Ce1l4A and 5558.50 for Ce1l4B)? .X--no __ yes
If Cell 4A leak detection system level exceeds 12 inches above the lowest point on the bottom flexible
membrane liner (elevation 5556.14 amsl), notify supervisor or Mill manager immediately.
~iXUffi!!nw anrl, S;euh't!t'!l4tpT~DjMQL:xjrl $enjl~mT~'®')!enitt fj!g.s1,{'~III!eIlJLomlookt\\'MTy&~.U'jf)MT E!!tm ~btu!ID' un 2 ~, ~ 1. s
clf"41L<~~tQZ·~J~m:PI~.;u;y2!li,~ Rwil~§ sI~dMN .. \!lM'fe.Wl\PMTP.IM Q~~
~. ~.~~~~~JN.~'i Il.S4red~ .
Attachment D
Feet Below Top of Standpipe
N N N ~ ~ ~ ~ N 0 00 en ~
(:) (:) (:) (:) (:) (:)
0 0 0 0 0 0
1/30/2009
3/30/2009
5/30/2009
7/30/2009
n tD 9/30/2009
11/30/2009 N
+ V\ --.
1/31/2010
V'l 3 ~ roO tD Vl U) N
C 3/31/2010
""'" ~
5/31/2010 -. :::s
7/31/2010 N
0
9/30/2010
0 c: U) ::J C'D ... Q)
11/30/2010.
""" N Vl 0 C'D
""" ~ roO
Vl 0 .!:;. ...
N 1/31/2011
0
~
~ 3/31/2011
J20
N 5/31/2011
0
~
N 7/31/2011
9/30/2011
11/30/2011
1/31/2012
Attachment E
Attachment F
i ~
January 2012
Date
1/6/2012
1/13/2012
1/20/2012
1/27/2012
Cell 4A LOS Monitoring Information
Weekly measurements in
inches from transducer at
the bottom of the LDS
sump.
10.6
8.6
11 .8
9.3
Flow Meter in Gallons
264460
264460
264460
264460
Highest level for the month based on the daily data was 13.0 inches and the lowest level for the month
was 6.7 inches. Total number of gallons pumped was O.
February 2012
Weekly measurements in
inches from transducer at
the bottom of the LDS
Date sump. Flow Meter in Gallons
2/3/2012 9.9 264460
2/10/2012 9.1 264460
2/17/2012 10.9 264460
2/24/2012 6.5 264460
Highest level for the month based on the daily data was 14.8 inches and the lowest level for the month
was 7.4 inches. Total number of gallons pumped was O.
March 2012
Date
3/2/2012
3/9/2012
3/16/2012
3/23/2012
3/30/2012
Weekly measurements in
inches from transducer at
the bottom of the LDS
sump.
13.4
5.1
5.0
6.5
7
Flow Meter in Gallons
264460
264461
266699
266699
266699
Highest level for the month based on the daily data was 13.4 inches and the lowest level for the month
was 5.0 inches. Total number of gallons pumped was 2239.
For the 1 st Quarter 2012, the highest level was 14.8 inches and the lowest level was 5.0 inches and 2239
gallons were pumped.
-'-
January 2012
Date
1/6/2012
1/13/2012
1/20/2012
1/27/2012
Cell 48 LOS Monitoring Information
Weekly measurements in
inches from transducer at
the bottom of the LDS
sump.
1.80
1.25
0.97
1.52
Flow Meter in Gallons*
38
38
38
38
Highest level for the month based on the daily data was 2.36 inches and the lowest level for the month
was 0.97 inches. Total number of gallons pumped was O.
February 2012
Date
2/3/2012
2/10/2012
2/17/2012
2/24/2012
Weekly measurements in
inches from transducer at
the bottom of the LDS
sump.
1.52
1.25
0.97
1.52
Flow Meter in Gallons*
38
38
38
38
Highest level for the month based on the daily data was 1.80 inches and the lowest level for the month
was 0.69 inches. Total number of gallons pumped was O.
March 2012
Date
3/2/2012
3/9/2012
3/16/2012
3/23/2012
3/30/2012
Weekly measurements in
inches from transducer at
the bottom of the LDS
sump.
1.52
0.97
0.14
1.02
1.57
Flow Meter in Gallons**
38
43
o
o
o
Highest level for the month based on the daily data was 2.13 inches and the lowest level for the month
was 0.14 inches. Total number of gallons pumped was 5.
For the 1st Quarter 2012, the highest level was 2.36 inches and the lowest level was 0.14 inches and
5 gallons were pumped.
* On December 6, 2011, the processor on Cell 4B was replaced to address problems noted with the
totalizer in 04 2011. The new processor reset the total gallons pumped to zero. The last reading
before the processor was changed on December 6, 2011 was 360970. On December 6, 2011, 13
gallons were pumped manually to test the system after the maintenance/installation of the new
processor.
** On March 16, 2012 the Programmable Logic Controller (PLC) on Cell4B was replaced to address
problems noted with the flow meter. The new PLC reset the total gallons pumped to zero. The last
reading before the processor was changed was 43.
G.IYntttcConsuftants Table 1A
Calculated Action Lalkqe Rates for Various Head Condltlons
CeJl4A, White Meia Mill
BlandIn" Utah
Head Above LIner e»la ..... Actfon ....... Rate
sYltem (feet, (ptlaht/_ete/daV)
5 222.04
16 314.0
15 384~5B
20 444.08
25 496.5
, ' 30 549,88
35 587.s
37 604.0
G'Dqntec ColllUbnfl Tibia 18
Carculated ActIon Lfakage Rates for Various Head Condltrons
Cell 48, WhIte Mell Mill
Bllndln&, Utah
HI.d Above Une,sptem c:.fCIIlltld ActJon Ltaup Rate '
(f ... ) "Ino ns/. are/day)
5 211.4
10 117.0
15 869.9
ZO 422.7
25 47S.6 -' SO 528.4 as 570.0 --37 581.2
--
Max head on Cell 4A FM L
Max elevation (ft.)
FML elevation (ft.)
Head (ft.)
From BAT O&M Table 1A (gallon/acre/day)
Acres of fluid based on maximum level (acres)
Max allowable flow rate (gal/day)
4A -Q12012
5592.47
5555.55
36.92
604.0
40
24160
Max head on Cell 4B FM L
Max elevation (ft.)
FML elevation (ft.)
Head (ft.)
From BAT O&M Table 1B (gallon/acre/day)
Acres of fluid based on maximum level (acres)
Max allowable flow rate (gal/day)
4B -Q12012
5580.75
5557.50
23.25
475.6
36.17
17202
I
I I
I
./ , i
I
f
f :
I I
1 i
I ! 1
1 ,
!
I !
Calculation of Maximum Daily Allowable LDS Flow Volume for Varying Head Conditions in
Cells 4A and 4B
The equation for the calculation of maximum daily allowable flow volume in Cells 4A and 4B is
as follows:
Step 1)
Where:
Step 2)
Step 3)
Step 4)
Elevation I-Elevation 2 = Head (ft.)
Elevation 1 is the maximum elevation in feet measured during the reporting
period.
Elevation 2 is the FML elevation in feet.
Determine Calculated Action Leakage Rate from Table lA (for Cell 4A) or Table
IB (for Ce114B) using the head calculated in Step 1 above. If the head calculated
in step 1 above falls between two values in the Head Above Liner System (feet)
column, then the closet of these two values will be used to determine the
Calculated Action Leakage Rate.
Calculate the acres of tailings cell fluids based on the area of the base of the cell,
the head, and the angle of the sideslopes of the cell.
Action Leakage Rate (from Table lA or IB) X Acres of Taiiings Cell Fluids =
MaximuD?-DailyAllowable Flow Volume
Cell 1 and Cell 3 LOS Monitoring Information -First Quarter 2012
January 2012
Measurement in Measurement in
inches from inches from
Cell Date transducer at the Cell Date transducer at the
bottum of the LDS bottum of the LDS
sump. sump.
Celli 1/6/2012 Dry Cell 3 1/6/2012 Dry
1/13/2012 Dry 1/13/2012 Dry
1/20/2012 Dry 1/20/2012 Dry
1/27/2012 Dry 1/27/2012 Dry
February 2012
Measurement in Measurement in
inches from inches from
Cell Date transducer at the Cell Date transducer at the
bottum of the LDS bottum of the LDS
sump. sump.
Cell 1 2/3/2012 Dry Cell 3 2/3/2012 Dry
2/10/2012 Dry 2/10/2012 Dry
2/17/2012 Dry 2/17/2012 Dry
2/24/2012 Dry 2/24/2012 Dry
March 2012
Measurement in Measurement in
inches from inches from
Cell Date transducer at the Cell Date transducer at the
bottu m of the LDS bottum of the LDS
sump. sump.
Celli 3/2/2012 Dry Cell 3 3/2/2012 Dry
3/9/2012 Dry 3/9/2012 Dry
3/16/2012 Dry 3/16/2012 Dry
3/23/2012 Dry 3/23/2012 Dry
3/30/2012 Dry 3/30/2012 Dry
Attachment G
This attachment has been deliberately left blank.