DRC-2011-002214 - 0901a06880208ec3

DENISO
MINES
C-EOll-002214
J i- M
I M
^^^^
f.',
Denison Mines (USA) Corp.
1050 17th Street, Suite 950
Denver, CO 80265
USA
Tel: [phone]
Fax: [phone]
www.denisonmines.com
February 25, 2011
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
Re: Transmittal of DMT Performance Standards Monitoring Report and Cell 4A BAT
Performance Standards Monitoring Report for the 4"* Quarter of 2010
Dear Mr. Lundberg:
Enclosed please fmd two copies of the DMT Performance Standards Monitoring Report and Cell
4A BAT Performance Standards Monitoring Report for the 4"" Quarter of 2010, as required
under Parts I.F.2 and 1.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
February 25,2011
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 Ce1l4A BAT
Performance Standards Monitoring Report for the 4th Quarter of 2010
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 4th Quarter of 2010, 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 BAT
PERFORMANCE STANDARDS MONITORING REPORT
4th Quarter
October through December
2010
State of U tab
Gxoundwater Discharge Permit No. UGW370004
Prepared By:
Denison Mines (USA) Corp.
1050 t i h Street, Suite 950
Denver, CO. 80265
February 25, 2011
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 MONTHLY SLIMES DRAIN WATER LEVEL MONITORING ............................... 3
4.1 GENERAL ................................................................................................................................................... 3
4.2 RESULTS FOR THE QUARTER ................................................................................................................ 4
4.3 QUALITY ASSURANCE EVALUATION AND DATA VALIDATlON ................................................... 4
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 .................................... 5
8.0 DECONTAMINATION PADS ......................................................................................... 6
8.1 SUMMARY OF WEEKLY WATER LEVEL (DEPTH) INSPECTIONS .................................................. 6
8.2 ANNUAL INSPECTION OF EXISTING DECONTAMINATION PAD ..................................................... 8
8.3 NEW DECONTAMINATION PAD ............................................................................................................ 8
9.0 CELL 4A BAT PERFORMANCE STANDARDS REPORT FOR THE QUARTER ............ 8
9.1 LDS MONITORING .................................................................................................................................. 8
9.1.1 Operational Status of LDS Pumping and Monitoring Equipment ................................ 8
9.1.2 Measurement of Weekly Fluid Head at the Lowest Point in the Secondary Membrane ........... 9
9.1.3 Measurement of the Volume of Fluids Pumped from the LDS ...................................... 9
9.2 MEASUREMENT OF WEEKLY WASTEWATER FLUIDS IN CELL 4A .............................................. 9
9.3 SLIMES DRAIN RECOVERY HEAD MONITORING ............................................................................. 9
10.0 ANNUAL SLIMES DRAIN RECOVERY HEAD REPORT FOR THE
CALENDAR YEAR 2010 ................................................................................................. 9
10.1 INDIVIDUAL SLIMES DRAIN RECOVERY HEAD FOR 2009 ........................................................... 10
10.2 AVERAGE SLIMES DRAIN RECOVERY HEAD FOR 2010 ............................................................... 10
10.3 TIME SERIES CHART ............................................................................................................................. 10
N:\Required Reports\DMT Reports\2010 DMT Report\Q4 2010 DMT Report\Q4 2010 DMT Report draft.docx
10.4 QUALITY ASSURANCE EVALUATION AND DATA VALIDATION ................................................. 10
10.5 DEMONSTRATION OF COMPLIANCE STATUS WITH THE REQUIREMENTS OF PART I.D.3(B)
AND I.E.7(B) OF THE PERMIT ............................................................................................................. 11
10.5.1 Permit Requirements ........................................................................................................... 11
10.5.2 Demonstration of Compliance with Permit Requirements .................................................. 12
11.0 SIGNATURE AND CERTIFICATION ........................................................................ 15
LIST OF TABLES
Table 1 -Summary of Waste Water Pool Elevations
Table 2 -New Decontamination Pad Inspection Portal Level for the Second Quarter 2010
Table 3 -SDRE Data to be Used for Certain Years
Table 4 -Cell 2 Slimes Drain Recovery Head and SDRE Values for 2010
Table 5 -Cell 2 Slimes Drain Recovery Head and SDRE Values for 2009
ATTACHMENTS
A Tailings Cell and Roberts Pond Wastewater Elevations
B Notices Pursuant to Part I.G.3 of the Permit
C Monthly Cell 2 Slimes Drain Monitoring Data for 2010
D Graph of Cell 2 Slimes Drain Water Levels Over Time
E Cell Liner Repair Reports and Notices
F Cell 4A Leak Detection System Data for the Quarter and BAT O&M Plan Table 1A
G Annual Inspection Forms for Existing and New Decontamination Pads (Part LF.12)
ii
WHITE MESA URANIUM MILL
DMT PERFORMANCE STANDARDS MONITORING REPORT AND CELL 4A BAT
PERFORMANCE STANDARDS MONITORING REPORT
FOR THE 4th QUARTER OF 2010
1.0 INTRODUCTION
This is the routine Discharge Minimization Technology ("DMT") Performance Standards
Monitoring Report for the 4th quarter of2010 (the "Quarter") prepared by Denison Mines (USA)
Corp. ("Denison"), as required under Part I.F.2 of the White Mesa Mill's (the "Mill's") State of
Utah Groundwater Discharge Permit No. UGW370004 (the "Permit"), and the Routine Cell 4A
Best Available Technology ("BAT") Performance Standards Monitoring Report for the Quarter,
as required under Part I.F.3 of the Permit.
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 I.D.3, I.E.7, and I.F.ll of the Permit:
• Weekly tailings wastewater pool elevations for tailings Cells 1 and 3 (Part
I.E.7(a));
• Monthly slimes drain water levels in Cell 2 (Part I.D.3(b)(1) and (2));
• Annual Slimes Drain Compliance (Part I.D.3 (b) and I.F.11
• Weekly wastewater level measurements in Roberts Pond (Part I.D.3(e) and Part
1.E.7(a));
• Weekly feedstock storage area inspections and inspections of feedstock materials
stored outside of the feedstock storage area (Part I.D.3(f) and Parts I.E.7(d) and
(e));
• Any tailings cell and pond liner system repairs (Part I.E.7 (f) and Part I.E.(S)(c));
• Weekly New Decontaminatin Pad Inspection (Part 1.E.7 (g)) and
• Annual Decontamination Pad Concrete Inspection (Part I.F.11 ) (not required this
reporting period)
Also during the Quarter, the following Cell 4A BAT performance standards monitoring was
performed or addressed, as required by PartsLE.S and I.E.12 of the Permit:
• Leak detection system ("LDS") monitoring for Ce1l4A (Part I.E.S.(a)); and
• Weekly tailings wastewater pool elevations for tailings Ce1l4A (Part I.E.S (a)).
1
N:\Required Reports\DMT Reports\2010 DMT ReportlQ4 2010 DMT ReportlQ4 2010 DMT Report draft.dOCX
3.0 WEEKLY TAILINGS WASTEWATER POOL ELEVATION MONITORING
Mill personnel monitored and recorded weekly the elevation of wastewater in Tailings Cells 1, 3
and 4A to ensure compliance with the maximum wastewater elevation criteria mandated by
Condition 10.3 of the Mill's State of Utah Radioactive Materials License No. UT 1900479 (the
"License"). These measurements were made from an elevation survey. The results of such
monitoring, reported as feet above mean sea level (fmsl), are included in Attachment A.
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 fmsl.
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
of the State of Utah Radiation Control Board (the "Executive Secretary"). The current freeboard
limit for Cell 3 was previously calculated under this procedure at 5,601.6 fmsl. However, in a
letter from the Executive Secretary dated November 20, 2008, an interim variance and limit was
established at 5,602.5 fmsl for Cell 3.
The Mill has filled Cell 3 to its final tailings solids capacity in preparation for closure, and pre-
closure activities are underway. As discussed in the DMT Performance Standards Monitoring
Report and Cell4A BAT Performance Standards Monitoring Report for the 3rd Quarter of2010,
the process of filling Cell 3 with solids and the reduction of the liquid "pool" area to a number of
small "puddles" has rendered the freeboard limit meaningless. The solids filling activities in the
third quarter of 20 1 0 resulted in two apparent exceedances of the freeboard limit, which were the
subject of a Notice to the Executive Secretary under Part I.G.3 of the Permit and Utah
Administrative Code ("UAC") R317-6-6.16(C), dated August 4,2010. The notice of August 4,
2010 explained that it is no longer possible to manage the Cell 3 freeboard to achieve the
calculated freeboard limit during the final stages of filling Cell 3 with solids and closing Cell 3.
The continuing solids filling process during the fourth quarter of2010 resulted in all but one of
the weekly fluid elevation measurements remaining above the freeboard limit of 5,602.50 fmsl as
anticipated in the notice of August 4, 2010. However, as discussed below, at no time has the
fluid level exceeded the maximum wastewater elevation of 5605.5 fmsl as required under Part
I.D.2 of the Permit.
In addition, Part I.D.2 of the Permit 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 fmsl, the top of the FML in Cell 3 is at
5,608.5 fmsl and the top of the FML in Cell 4A is at 5,598.5 frnsl. This means that the
maximum wastewater pool elevations in Cells 1, 3 and 4A permitted under Part I.D.2 of the
Permit are 5,615.5, 5,605.5 and 5,595.5 fmsl, respectively.
The wastewater pool elevations in Cells 1, 3 and 4A, as measured during the Quarter, are
summarized in the following Table 1. As indicated in Table 1, the applicable freeboard limits
2
N:\Required Reports\DMT Reports\2010 OMT Report\Q4 2010 OMT Report\Q4 2010 OMT Report draft.dOCX
were not exceeded during the Quarter for Cell 1 and Cell 4A. As discussed above, Cell 3 is
currently filled with solids and the freeboard limits are no longer meaningful.
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
to.3 (fmst) the Permit (fmsl)
Celli 5613.82 5,615.40 5,615.50
Cell 3 5,604.54* 5,602.50** 5,605.50**
Ce1l4A 5,593.13 5,593.74*** 5,595.50
*This is the maxlmum wastewater elevatlOn m Cell 3 durmg the Quarter.
** Cell 3 is now full of solids, is undergoing pre-closure steps, and the freeboard limit specified here is no longer
meaningful.
*** 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
Cell 4B that will accommodate the freeboard requirements of Cells 2, 3, 4A, and 48. The Executive Secretary
granted a variance from the Cell 4A freeboard limit on January 13,2011 and approved the removal of the Cell 4A
limit and the use ofCe1l4B on January 27,2011.
It should be noted that the maximum elevation of 5,593.74 fmsl for Cell 4A has been set
assuming that the total probable maximum precipitation ("PMP") volume for Cells 2, 3 and 4A
will be accommodated in Cell 4A. By letter dated December 11 , 2008, Denison applied for an
amendment to the License to set the freeboard limit for Cell4A at 5,593.74 fmsl and to eliminate
the need to set a freeboard limit for Cell 3, given that the freeboard limit of 5,593.74 fmsl for
Cell 4A is adequate to accommodate the total PMP volume for Cells 2, 3 and 4A. The Utah
Division of Radiation Control ("DRC") has indicated, in a letter of April 29, 2010, their
agreement with Denison's proposed revisions to the freeboard limits for Cells 3 and 4A, pending
Denison's submittal of revisions to the Permit and the White Mesa Mill Tailings Management
System and Discharge Minimization Technology Monitoring Plan ("DMT Plan") reflecting the
proposed changes. Denison prepared and submitted these revisions on November 12, 2010. The
Executive Secretary approved the revisions to the DMT Plan, and authorized use of Cell 4B on
January 27,2011.
4.0 MONTHLY SLIMES DRAIN WATER LEVEL MONITORING
4.1 General
Part I.D.3(b)(1) of the Permit 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
3
N:\Required Reports\DMT Reports\20l0 DMT Report\Q4 2010 DMT Report\Q4 2010 DMT Report draft.dOCX
as is reasonably achievable, in accordance with the DMT Plan. Part I.D.3(b)(3) of the Permit
provides that for Cell 3, this requirement shall apply after initiation of dewatering operations.
Similarly, Part I.D.6(c) of the Permit 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 ofthe upper FML) in 6.4 years or less.
Part I.D.3(b)(2) of the Permit provides that the Permittee shall conduct a monthly slimes drain
recovery test at each tailings cell that 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, initiation of dewatering operations has not commenced in Cell 3 nor has the Mill
initiated pumping conditions in the slimes drain layer of Cell 4A. 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 Permit 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 Permit, Section 8.2 of the DMT Plan and
correspondence from DRC, dated February 7, 2008, the results of monthly 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 Cell 4A BAT Performance Standards Monitoring Report (the "DMT Reports"). Further,
beginning in 2008, quarterly DMT Reports must include both the current year monthly values
and a graphic comparison to the previous year. An annual slimes drain recovery head report, that
addresses the requirements of Part I.F.11 of the Permit and Section 8.2 of the DMT Plan must be
included in the 4th quarter DMT Report.
4.2 Results for the Quarter
In accordance with these requirements, the individual monthly 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, is included as
Attachment C to this Report. Those data, as well as the data for the previous year, including the
slimes drain recovery elevations ("SDRE"), are presented graphically in Attachment D.
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 Permit, and have verified the accuracy and reliability of
both the data and calculations reported.
4
N:\Required Reports\DMT Reports\2010 OMT Report\Q4 2010 OMT Report\Q4 2010 OMT Report draft.docx
As a result of its quality assurance evaluation and data validation review, Denison has concluded
that all of the 2010 monthly and all of the 2009 monthly slimes drain tailings fluid elevation
measurements set out in Tables 2 and 3 meet the test performance standards found in Part
LD.3(b)(2) of the Permit and can be used for purposes of determining compliance with the
requirements of Part LD.3(b)(2) ofthe Permit.
4.4 Graphic Comparison to Previous Year
A graph showing the final depth to stable water level readings for each month in 2010 and 2009,
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 the previous year.
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
Permit. Part LD.3(e) ofthe Permit provides that the water level in Roberts Pond shall not exceed
an elevation of 5,624 fmsl.
The maximum wastewater elevation measured in Robert's Pond during the quarter was 5,622.96
fmsl, which did not exceed the maximum permitted elevation of 5,624 fmsl. 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
defined area described in the Permit and that all alternate feedstock located outside the defined
feedstock area is maintained within containers that comply with the requirements of Part LD.ll
of the Permit. The results of these inspections are recorded on the Weekly Mill Inspection
forms, which are available at the Mill for inspection. No variance from the requirements of part
LD.11 was noted during the weekly feedstock storage area inspections.
7.0 TAILINGS CELLS AND POND LINER SYSTEM REPAIRS
The liner systems at Cells 1, 2, and 3 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.
5
N:\Required Reports\DMT Reports\2010 DMT Report\Q4 2010 DMT Report\Q4 2010 DMT Report draft.dOCX
In accordance with Part I.E.7(t) of the Permit, 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 Permit 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 Cell4A to lower the CellI 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 of5614.57 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, Mill resumed pumping CellI to Ce1l4A to lower the solution level.
During discussions on August 12,2010, ORC 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 CellI FML above the 5613 foot level, on August 18,
2010, and 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.
The September 22 DRC letter and Part l.F.2 of the groundwater discharge permit require that the
repairs be documented in a liner repair report which shall be included with the next quarterly
DMT report, that is, 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 other than
Cell 1. Consistent with the approved repair plan and schedule, repairs to the Cell 1 FML were
conducted during the months of September and October 2010, ceased during the months of
November and December 2010, and are scheduled to resume in the month of April 2011.
8.0 DECONTAMINATION PADS
8.1 Summary of Weekly Inspections
Part I.F.7 (g) of the Permit and Section 3.1 of the DMT Plan requires 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 pnmary and secondary containments. The BAT
6
N:\Required Reports\DMT Reports\2010 DMT ReportlQ4 2010 DMT ReportlQ4 2010 DMT Report draft.dOCX
performance standards for the New Decontamination Pad are set out in Part LD.14 of the Permit.
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, the weekly inspections of the containments were stopped. Table 4 below
indicates the water level measurements in each portal measured during the second quarter 2010
that correspond to the last usage of the New Decontamination Pad. The data have been
maintained here for information purposes only.
Table 2 -New Decontamination Pad Inspection Portal Level for the Second Quarter 2010
Portall Portall Portall
Liquid Level Liquid Level Liquid Level
Date (in Feet)l (in Feet) (in Feet)
4/2/10 0.00 0.00 0.00
4/9/10 0.00 0.00 0.00
4116/10 0.00 0.00 0.00
4/23110 0.00 0.00 0.00
4/30/10 0.00 0.00 0.00
517110 0.00 0.00 0.00
5114110 0.00 0.00 0.00
5/21110 0.00 0.00 0.00
5/28/10 0.00 0.00 0.00
6/4110 0.00 0.00 0.00
6/11/10 0.00 0.00 0.00
6118110 0.00 0.00 0.00
6/25 /10 0.00 0.00 0.00
1. As per part LD.14 of the Permit, the water level shall not exceed 0.10 foot above the cement floor in any
LDS access pipe at any time.
As can be seen from the foregoing table, no fluids were observed to be present in any of the
portals during the second quarter. The New Decontamination Pad remained out of service
during the third and fourth quarters.
Any soil and debris identified during the weekly inspections was removed from the wash pad of
the New Decontamination Pad, in accordance with part LD.14 (a) of the Permit and Section 3.1
(e)(i)(F) of the DMT Plan. No cracks greater than 1/8" were observed during any weekly
inspections.
The Executive Secretary provided an authorization for use of the New Decontamination Pad in a
letter dated February 1, 2011. Use of the New Decontamination Pad is expected to resume in
February 2011.
7
N:\Required Reports\OMT Reports\201O OMT Report\Q4 2010 OMT Report\Q4 2010 OMT Report draft .dOCX
8.2 Annual Inspection of Existing Decontamination Pad
As required by Part I.F.12 of the Pennit, annual inspections of the existing decontamination were
conducted during the second quarter 2010. The documentation for the annual inspections are
reported in the Second Quarter DMT report submitted on August 30, 2010.
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 of a 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. As of December 31, 2010 the New Decontamination Pad had not
yet been approved for use.
The New Decontamination Pad was taken out of service and inspected during the second quarter
on April 13,2010 to ensure integrity of the wash pad's exposed concrete surface, as required by
Part I.F.12 of the Permit and Section 6.5 of the DMT Plan. No abnormalities were identified.
No significant cracks (greater than 1/8 inch), deterioration or damage were identified. No repairs
were required at the time of the inspection. A few minor cracks (less than 1/8 inch) were
observed. These minor cracks are being monitored to determine whether they expand over time
and require repair.
9.0 CELL 4A BAT PERFORMANCE STANDARDS REPORT FOR THE QUARTER
This Section constitutes the routine Cell 4A BAT Performance Standards Monitoring Report for
the Quarter, as required under Part I.F.3 ofthe Permit.
9.1 LDS Monitoring
9.1.1 Operational Status of LDS Pumping and Monitoring Equipment
The LDS pumping and monitoring equipment, including, but not limited to, the submersible
pump, pump controller, head monitoring, and flow meter equipment operated continuously
during the Quarter.
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) of
the Permit.
8
N:\Required Reports\DMT Reports\2010 DMT Report\Q4 2010 DMT Report\Q4 2010 DMT Report draft.dOCX
9.1.2 Measurement of Weekly Fluid Head at the Lowest Point in the Secondary Membrane
The readings pertaining to the fluid head above the lowest point in the secondary FML for Cell
4A 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 1-
foot distance equates to 2.28 feet above the LDS system transducer), as stipulated by Part
I.E.8(a)(2) of the Permit. During the Quarter, the fluid head in the Cell 4A LDS sump did not
exceed 9.6 inches above the LDS transducer.
9.1.3 Measurement of the Volume of Fluids Pumped from the LDS
The readings pertaining to the volume of fluids pumped are provided in Attachment F. As can
be seen from a review of Attachment F, during the Quarter, the average daily LDS flow volume
did not exceed 24,160 gallons/day, as stipulated by Part I.E.8(a)(3) of the Permit. Based on the
maximum head recorded on the FML during the Quarter of about 37 feet, the allowable flow rate
would actually be approximately 23,955 gallons per day, as determined under the Mill's Cell 4A
BAT Operations and Maintenance Plan, Table lA (also included in Attachment F of this report),
and assuming a liner elevation of 5555.55 feet and approximately 39.66 acres of liquid area. For
fourth quarter 2010, a total of 0 gallons were pumped.
9.2 Measurement of Weekly Wastewater Fluids in Ce1l4A
Weekly fluid elevations for Cell 4A are provided in Attachment A along with elevations for
Cells 1 and 3 and Roberts Pond. During the Quarter, the Mill operated and maintained
wastewater levels in Cell 4A to provide the minimum vertical freeboard as required by Part
I.E.8(a)(4) of the Permit. See the discussion in Section 3 above.
9.3 Slimes Drain Recovery Head Monitoring
As the Mill has not initiated pumping conditions in the Cell 4A 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 Permit.
10.0 ANNUAL SLIMES DRAIN RECOVERY HEAD REPORT FOR THE
CALENDAR YEAR 2010
This Section constitutes the annual slimes drain recovery head report for calendar year 2010 (the
"Period"), as required under Parts I.D.3 (b) and I.F.ll of the Permit and Section 8.2 of the DMT
Plan.
9
N:\Required Reports\OMT Reports\2010 OMT Report\Q4 2010 OMT Report\Q4 2010 OMT Report draft.dOCX
10.1 Individual Slimes Drain Recovery Head for 2009
The individual monthly slimes drain recovery head monitoring data for the Period, 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, is included as Attachment C to this Report. The equivalent
recovery water level elevation is determined by subtracting the final depth to stable water
measurement from the sheets in Attachment C or D from 5614.83 fmsl, being the surveyed
elevation of the measuring point. Those elevations are set out in Tables 3 and 4 below.
10.2 Average Slimes Drain Recovery Head for 2010
The simple average of the slimes drain recovery head for Cell 2 for the Period was 5603.49 finsl.
By comparison, the simple average slimes drain recovery head for the year immediately prior to
the Period was 5603.23 fmsl, using data that meet the test performance standards found in Part
I.D.3(b )(2) of the Permit. See Section 10.4 below.
10.3 Time Series Chart
Included in Attachment D is a time series chart that shows trends in the monthly recovery water
level elevations in the Cell 2 slimes drain over time, using data that meet the test performance
standards found in Part I.D.3(b)(2) of the Permit. See Section 10.4 below.
10.4 Quality Assurance Evaluation and Data Validation
Denison management has evaluated all data collected, data collection methods, and all related
calculations required by the Permit, and have verified the accuracy and reliability of both the
data and calculations reported. Based on these evaluations, the following observations were
made:
The monthly tailings fluid elevation measurements for each month in 2010 were reviewed and
found to meet the test performance standards found in Part I.D.3(b)(2) and to be suitable for use
in demonstrating compliance status in Section 10.5 below.
As a result of its quality assurance evaluation and data validation review, Denison has concluded
that:
1. All of the 2009 monthly slimes drain tailings fluid elevation measurements meet the
test performance standards found in Part I.D.3(b)(2) of the Permit and can be used for
purposes of determining compliance with the requirements of Part I.D.3(b )(2) of the
Permit.
2. All of the 2010 monthly slimes drain tailings fluid elevation measurements meet the
test performance standards found in Part I.D.3(b)(2) of the Permit and can be used for
purposes of determining compliance with the requirements of Part I.D.3(b)(2) of the
Permit.
10
N:\Required Reports\DMT Reports\2010 DMT Report\Q4 2010 DMT Report\Q4 2010 DMT Report draft.dOCx
10.5 Demonstration of Compliance Status with the Requirements of part I.D.3(b) and
I.E.7(b) of the Permit
10.5.1 Permit Requirements
Part LD.3 fthe Permit provides that annual slimes drain compliance shall be achieved when the
average annual wastewater recovery elevation in the slimes drain access pipe, as determined
pursuant to the DMT Plan, meets the conditions in Equation 1, below:
Equation 1:
[LEy + LY_I + L y-2] / Ny + N y_1 + N y-2] < [LEy_1 +Ly-2+ L y-3] / N y-I + N y-2+ N y-3]
Where:
=
Sum of all monthly slimes drain tailings fluid elevation measurements that meet
the test performance standards found in Part LD.3(b)(2), during the calendar year
of interest. Hereafter, these water level measurements are referred to as slimes
drain recovery elevations (SDRE). Pursuant to the DMT Plan, these recovery
tests are to be conducted monthly and the SDRE values reported in units of feet
above mean sea level (amsl).
Sum of all SDRE measurements made in the year previous to the calendar year of
interest.
Sum of all SDRE measurements made in the second year previous to the calendar
year of interest.
Sum of all SDRE measurements made in the third year previous to the calendar
year of interest.
Total number of SDRE tests that meet the test performance standards found in
Part LD.3(b )(2), conducted during the calendar year of interest.
Ny_1 Total number of SDRE tests that meet the test performance standards found in
Part LD.3(b)(2), conducted in the year previous to the calendar year of interest.
Ny-2 Total number of SDRE tests that meet the test performance standards found in
Part LD.3(b)(2), conducted in the second year previous to the calendar year of
interest.
Ny-3 Total number of SDRE tests that meet the test performance standards found in
Part LD.3(b)(2), conducted in the third year previous to the calendar year of
interest.
11
N:\Required Reports\DMT Reports\2010 DMT Report\Q4 2010 DMT Report\Q4 2010 DMT Report draft.dOCX
Part LD.3 further provides that prior to January 1, 2013, the following values for E and N in
Equation I shall be based on SDRE data from the following calendar years.
Table 3 -SDRE Data to be Used for Certain Years
Report Source of Data By Calendar Year for Equation 1 Variables (right
for side)
Calendar Ey-1 Ey-2 Ey-3 Ny-l Ny-2 Ny-3
Year
2010 2009 2009 2009 2009 2009 2009
2011 2010 2009 2009 2010 2009 2009
2012 2011 2010 2009 2011 2010 2009
Part LD.3 provides that failure to satisfy conditions in Equation 1 shall constitute DMT failure
and non-compliance with the Permit, and that for Cell 3, this requirement shall apply after
initiation of de-watering operations.
10.5.2 Demonstration of Compliance with Permit Requirements
2010 SDRE values that meet the test performance standards found in Part LD.3(b)(2), reported in
units ofFMSL are as follows:
Table 4 -Cell 2 Slimes Drain Recovery Head and SDRE Values for 2010
Reported Final
2010 Test Closing Elevation of Depth to Stable SDRE Values
Date Measurement Point Water Level Re~orted as fmsl
1115/2010 5,614.83 13.96 5,600.87
2/21/2010 5,614.83 12.50 5,602.33
3115/2010 5,614.83 11.04 5,603.79
4/12/2010 5,614.83 10.40 5,604.43
5/19/2010 5,614.83 10.43 5,604.40
6/30/2010 5,614.83 10.13 5,604.70
8/2/2010 5,614.83 10.74 5,604.09
8/25/2010 5,614.83 10.65 5,604.18
9/24/2010 5,614.83 11.50 5,603.33
10/25/2010 5,614.83 12.35 5602.48
11123/2010 5,614.83 10.81 5604.02
12122/2010 5,614.83 11.58 5603.25
LE20 ]0 = 67,241.87
N2010=12
12
N:\Required Reports\DMT Reports\2010 DMT Report\Q4 2010 DMT Report\Q4 2010 DMT Report draft.dOCX
2009 SDRE values that meet the test perfonnance standards found in Part J.D.3(b)(2), reported in
units of FMSL are as follows:
Table 5 -SDRE Values for 2009
2009 Test Closing Elevation of Reported Highest SDRE Values
Date Measurement Point Level (feet) (Reported as fmsl)
(fmsl)
1130/2009 5614.83 11.25 5603.58
2/27/2009 5614.83 9.35 5605.48
3/28/2009 5614.83 8.84 5605.99
4/27/2009 5614.83 11.98 5602.85
5/20/2009 5614.83 10.28 5604.55
6/22/2009 5614.83 13 5601.83
7/30/2009 5614.83 13 5601.83
8/31/2009 5614.83 11.04 5603.79
9/2812009 5614.83 11.46 5603.37
10/30/2009 5614.83 13.35 5601.48
11123/2009 5614.83 12.49 5602.34
12114/2009 5614.83 13.12 5601.71
IE2009 =67 ,238.8
N2009 = 12
Based on the foregoing, it is evident that IE20IO = 67,241.87 fmsl, and N20IO = 12, and that IE2009
= 67238.8 fmsl, and N2009 = 12
Also, based on Table 2 above, for year 2010,
By-I = E y-2 = E y-3, that is all are to be based on 2009 data, and N y-l = N y-2 = N y-3, that is, all are to
be based on 2009 data
Based on these values, equation 1 can be applied as follows:
[IEy + IEy-1 + IEy-2 ] 1 [Ny + Ny-l + N y-2 ] = [67,241.87 + 67,238.8 + 67,238.8]/[12 + 12 + 12]
= 5603.32 finsl
and
[IEy-l + IEy-2 + IEy-3 ] 1 [ N y_1 + N y-2 + N y-3 ] =[67,238.8 + 67,238.8 + 67,238.8]/[12 + 12 +
12] = 5603.23 fmsl
Although 5,603.32 fmsl is essentially the same level as 5,603.23 fmsl, it is 0.09 foor (1") higher.
Therefore, annual slimes drain compliance has not been achieved for 2010, in accordance with
Part J.D.3 of the Pennit. However, for the reasons discussed below, Denison believes that the
13
N:\Required Reports\DMT Reports\20 10 DMT Report\Q4 2010 DMT Report\Q4 20 I 0 DMT Report draft.dOCX
monitoring requirements of Part I.D.3(b )(2) seriously interfere with Denison's ability to comply
with Parts I.D.3(b)(i) and I.D.3 (b)(3) and should be amended.
Part I.D.3(b)(2) of the Permit requires that each slimes drain monthly monitoring test: 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.
It should be noted that, in 2010, order to meet the test requirements:
1. The slimes drain pump has remained off an average of 6.42 days per month every month
for performance of the measurements, and
2. This means that the slimes drain pump remains off approximately 77 days (11 weeks) per
year or 20 percent of the year for performance of measurements.
That is, in order to meet the requirements for testing in Part I.D.3(b)(2) of the Permit, it has not
been possible to run the slimes drain pump often enough to meet the requirement in Part
I.D.3(b)(1) of the Permit that Denison maintain the average wastewater recovery head in the
slimes drain access pipe as low as reasonably achievable, when the pump can only be run 80% of
the time. That is, the monitoring requirement to demonstrate the slimes drain level has been
reduced, seriously interferes with the pumping needed to reduce the slimes drain level.
Nonetheless, even with the limitation of operating only 80% of the year due to the monitoring
constraint, the Mill has maintained the slimes drain at an approximately constant level. It is
anticipated that if the monitoring constraint were modified to allow more pumping time,
compliance with the Part I.D.3(b) requirements could be achieved. Denison recommends that
the monitoring requirement in the Permit be modified to allow the slimes drain pump sufficient
running time to dewater the cell. For example, the monitoring requirement could be reduced
from monthly to quarterly. This would reduce the downtime to approximately 26 days per year,
or increase the pumping time to 339 days per year, or 93%, which would help.
In addition, the following factors should be noted:
1. The slimes drain elevation measured at the end of 2010 was lower than the slimes drain
elevation measured at the beginning of2009, indicating an overall reduction in elevation;
2. For both 2009 and 2010 there appeared to be a rise in elevation over the period from
January through March, followed by a reduction over the remainder of the year. The rate
of reduction for the remainder of the year in 2010 was lower than in 2009, possibly due to
the significantly higher precipitation experienced in 2010 of 15.13 inches compared to
the 2009 total precipitation of8.13 inches. The Mill was able to maintain the 2010 slimes
drain recovery level within 1 inch of the preceding year's level despite the fact that the
annual precipitation was 7 inches (186%) higher than the preceding year.
14
N:\Required Reports\DMT Reports\2010 DMT ReportlQ4 2010 DMT ReportlQ4 2010 DMT Report draft.dOCX
11.0 SIGNATURE AND CERTIFICATION
This document was prepared by Denison on February 25, 2011.
By:
David . ~ yd nlund
Vice Presiden~ Regulatory Affairs and Counsel
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 complete. I am ware that there are significant penalties for submitting false information,
including th ossi IJity of fine and imprisonment for knowing violations.
Vice President, _ egulatory affairs and Counsel
Denison Mines (USA) Corp.
15
N:\Required Reports\DMT Reports\2010 DMT ReportlQ4 2010 DMT ReportlQ4 2010 DMT Report draft.dOCX
Tab A
Tailings Pond Elevations
4th Quarter Elevations
Date Cell 1 Cell 3 Roberts Pond Cell4A
Free Board 1 5615.40 5602.50 5624.00 5593.74
10/1/2010 5613.45 5604.41 5617.97 5588.75
10/8/2010 5613.81 5603.23 5618.39 5588.73
10/15/2010 5612.38 5604.47 5617.98 5589.67
10/22/2010 5613.34 5604.43 5618.48 5589.69
10/29/2010 5613.44 5603.21 DRY 5589.94
11/5/2010 5613.44 5603.35 5619.42 5589.91
11/12/2010 5613.38 5604.14 5619.64 5590.18
11/19/2010 5613.49 5604.54 5620.48 5590.47
11/26/2010 5613.51 5602.02 5620.53 5591.01
12/3/2010 5613.48 5602 .59 5620.78 5591.31
12/10/2010 5613.48 5602.88 5622.84 5591 .85
12/17/2010 5613.48 5602.98 5622.96 5592.03
12/23/2010 5613.67 5603.66 5622.14 5592.63
12/31/2010 5613.82 5603.92 5622.28 5593.13
Notes:
1. Freeboard as permitted under License condition 10.3
2. The Mill has filled Cell 3 to its final tailings solids capacity in preparation for closure,
and pre-closure activities are underway. There is no remaining pool area of any
significance in Cell 3.
•
Tab B
This attachment has been deliberately left blank.
Tab C
MONTHLY HEAD MEASUREMENT TEST
January-IO
Location: Date: 1/15/2010
Slimes Cell # 2
Sampler: Tanner Holliday
Ryan Palmer
1/11/2010 1/12/2010 1/13/2010 1/14/2010 1/15/2010
600
700 24.75 17.53 15.41 14.42 13.96
800 24.05 17.4 15.39 14.4 13.96
900 23.37 17.28 15.35 14.39 13.96
1000 22.72 17.16 15.29 14.37 13.96
1100 22.23 17.03 15.25 14.35
1200 21.71 16.92 15.19 14.34
1300 21.24 16.79 15.12 14.3
1400 20.87 16.65 15.03 14.26
1500 20.55 16.52 14.94 14.24
1600
13.96
Comments: The Reporting number is 13.96
MONTHLY HEAD MEASUREMENT TEST
Location: Date: 2/21/2010
Slimes Cell # 2
Sampler: Tanner Holliday
Ryan Palmer
2/15/2010 2/16/2010 2/17/2010 2/18/2010 2/19/2010 2/20/2010
600
700 17.55 15.47 14.4 13.66
800 17.42 15.44 14.38 13.65
900 24.34 17.31 15.4 14.34 13.63
1000 23.91 17.2 15.35 14.3 13.61
1100 23.32 17.08 15.31 14.27 13.58
1200 22.66 16.95 15.25 14.22 13.56
1300 22.06 16.81 15.19 14.18 13.54
1400 21.65 16.7 15.12 14.15 13.48
1500 21.12 16.59 15.05 14.08 13.43
1600
Comments: The report number is 12.5 it took longer than usual to stablize I don't
know if the weather had anything to do with this or not?
13.05
13.04
13.02
2/21/2010
12.5
12.5
12.5
12.5
MONTHLY HEAD MEASUREMENT TEST
Location: Date: 3/15/2010
Slimes Cell # 2
Sampler: Tanner Holliday
Ryan Palmer
3/8/2010 3/9/2010 3/10/2010 3/11/2010 3/12/2010 3/14/2010 3/15/2010
600
700 16.47 14.09 13.07 12.46 11.04
800 16.31 14.06 13.07 12.46 11.04
900 16.15 14.03 13.07 12.46 11.04
1000 16.00 13.97 13.05 12.43
1100 23.73 15.79 13.90 13.03 12.40
1200 23.21 15.76 13.82 13.00 12.35
1300 22.53 15.64 13.75 12.97 12.30
1400 21.80 15.52 13.68 12.93 12.26
1500 21.31 15.34 13.61 12.89 12.23
1600 11.09
11.04
Comments: Three consecutive readings was obtained earlier in the week but the 90 hrs
had not been reached. The pump remained off during the weekend, one reading was
taken on Sunday the 14th at 1730 hrs. Monday Morning we achieved three consecutive
readings once again and by this time the 90 hr requirement was also meet. The reading
at this time was 11.04 which will be the reporting number for this recovery test.
MONTHLY HEAD MEASUREMENT TEST
Location: Date: 4/12/2010
Slimes Cell # 2
Sampler: Tanner Holliday
4/5/2010 4/6/2010 4/7/2010 4/8/2010 4/9/2010 4/12/2010
600
700 20.83 15.38 13.81 12.78 11.89 10.4
800 20.37 15.29 13.78 12.76 11.88 10.4
900 19.93 15.2 13.75 12.7 11.85 10.4
1000 19.58 15.09 13.7 12.67 11.83
1100 19.23 14.99 13.66 12.62 11.8
1200 18.85 14.9 13.62 12.58 11.77
1300 18.57 14.81 13.56 12.51 11.73
1400 18.21 14.73 13.5 12.47 11.69
1500 17.93 14.65 13.44 12.39 11.64
1600
Comments: Additional readings were taken over the weekend, each day had one
reading taken. On the 10th the level was 11.41 the reading on the 11th was 10.77.
The report number was 10.4 for the month of April.
MONTHLY HEAD MEASUREMENT TEST
location: Date: 5/19/2010
Slimes Cell # 2
Sampler: Tanner Holliday, Ryan Palmer
5/10/2010 5/11/2010 5/12/2010 5/13/2010 5/14/2010 5/17/2010 5/18/2010 5/19/2010
600
700 17.29 15.06 13.87 13.07 11.35 10.78 10.43
800 17.08 14.98 13.85 13.04 11.34 10.77 10.43
900 16.93 14.90 13.82 13.00 11.32 10.75 10.43
1000 16.75 14.85 13.8 12.96 11.3 10.72
1100 16.60 14.79 13.75 12.93 11.27 10.7
1200 16.47 14.72 13.71 12.90 11.24 10.68
1300 16.34 14.66 13.68 12.85 11.21 10.66
1400 23.64 16.23 14.60 13.64 12.82 11.17 10.65
1500 22.95 16.13 14.54 13.59 12.80 11.13 10.62
1600
10.43
Comments: The report number is 10.43
When the slimes test was started it was found that the main breaker was
tripped. It was determined that the breaker couldn't have tripped to long ago
based on the first depth reading of 23.64
MONTHLY HEAD MEASUREMENT TEST
Location: Date: 6/30/2010
Slimes Cell # 2
Sampler: Tanner Holliday
Garrin Palmer, Ryan Palmer
6/21/2010 6/22/2010 6/23/2010 6/24/2010 6/25/2010 6/28/2010
600
700 23.37 14.97 13.3 12.31 11.56 10.13
800 22.11 14.88 13.3 12.29 11.56 10.13
900 21.36 14.80 13.2 12.26 11.55 10.13
1000 20.66 14.71 13.2 12.23 11.52
1100 20.01 14.62 13.1 12.19 11.48
1200 19.62 14.53 13.1 12.15 11.45
1300 19.13 14.43 13.0 12.10 11.41
1400 18.71 14.34 13.0 12.06 11.38
1500 18.29 14.27 12.9 12.02 11.35
1600
10.13
Comments Report number is 10.13. An additional reading was taken on 6/26/10
At 1120 and the measurement was 10.90.
MONTHLY HEAD MEASUREMENT TEST
Location: Date: 7/26/10-8/2/10
Slimes Cell # 2
Sampler: Tanner Holliday
Garrin Palmer
7/26/2010 7/27/2010 7/28/2010 7/29/2010 7/30/2010 8/1/2010 8/2/2010
600
700 16.09 14.19 13.16 12.32 10.74
800 23.95 15.99 14.15 13.13 12.30 10.74
900 23.18 15.90 14.10 13.10 12.28 10.74
1000 22.25 15.82 14.05 13.05 12.24
1100 21.61 15.64 14.00 13.01 12.22
1200 20.99 15.53 13.95 12.98 12.21
1300 20.55 15.42 13.89 12.94 12.14
1400 20.13 15.32 13.83 12.86 12.10
1500 19.79 15.24 13.77 12.82 12.05
1600 10.94
10.74
Comments: Report number that will be used is 10.74
MONTHLY HEAD MEASUREMENT TEST
Location: Date: 8/25/2010
Slimes Cell # 2
Sampler: Tanner Holliday
Garrin Palmer
8/25/2010 8/26/2010 8/27/2010 8/28/2010 8/29/2010 8/30/2010 8/31/2010 9/1/2010
600
700 15.85 13.92 11.46 11.08 10.65
800 15.75 13.88 11.43 11.06 10.65
900 21.85 15.61 13.83 11.42 11.05 10.65
1000 21.40 15.50 13.77 11.40 11.04
1100 20.96 15.44 13.70 11.38 11.03
1200 20.38 15.34 13.62 11.36 11.00
1300 19.97 15.25 13.58 11.32 10.97
1400 19.58 15.15 13.52 11.29 10.95
1500 19.23 15.04 13.45 11.56 11.25 10.93
1600
10.65
Comments: Slimes Drain was started a little late on the 25th of August. The full test was
completed on September 1st 2010. the report number is 10.65 for this, August 2010.
MONTHLY HEAD MEASUREMENT TEST
Location: Date: 9/24/2010
Slimes Cell # 2
Sampler: Tanner Holliday
Garrin Palmer
9/20/2010 9/21/2010 9/22/2010 9/23/2010 9/24/2010
600
700 15.35 13.07 11.99 11.50
800 25.95 15.20 13.00 11.98 11.50
900 23.78 15.06 12.95 11.97 11.50
1000 23.22 14.90 12.90 11.96
1100 22.30 14.77 12.85 11.94
1200 21.48 14.65 12.79 11.92
1300 20.67 14.52 12.73 11.89
1400 20.32 14.40 12.67 11.87
1500 19.75 14.28 12.61 11.84
1600
Comments: Report number that will be used is 11.50
MONTHLY HEAD MEASUREMENT TEST
Location: Date: 10/25/2010
Slimes Cell # 2
Sampler: Garrin Palmer
Tanner Holliday
10/18/2010 10/19/2010 10/20/2010 10/21/2010 10/22/2010
600
700 16.17 14.87 13.91 13.09 12.35
800 16.14 14.81 13.87 13.08 12.35
900 16.08 14.80 13.84 13.06 12.35
1000 16.02 14.76 13.82 13.03
1100 15.96 14.72 13.78 12.99
1200 15.89 14.65 13.74 12.96
1300 15.81 14.59 13.70 12.93
1400 15.72 14.55 13.66 12.89
1500 15.65 14.49 13.60 12.85
1600
Comments: when test was started the breaker was found tripped. That's why the beginning
levels were up from what they normally start at. The reporting nubmer is 12.35
MONTHLY HEAD MEASUREMENT TEST
Location: Date: 11/23/2010
Slimes Cell # 2
Sampler: Garrin Palmer
Tanner Holliday
11/16/2010 11/17/2010 11/18/2010 11/19/2010 11/21/2010 11/22/2010
600
700 28.60 15.98 13.84 12.63 10.81
800 26.82 15.84 13.78 12.58 10.81
900 25.33 15.71 13.72 12.54 10.81
1000 24.45 15.58 13.66 12.51
1100 23.84 15.45 13.60 12.46
1200 23.19 15.32 13.53 12.40
1300 22.49 15.19 13.46 12.35
1400 21.87 15.07 13.39 12.32
1500 21.28 14.95 13.31 12.25 10.95
1600
Comments: ------------------------------------------------------
MONTHLY HEAD MEASUREMENT TEST
Location: Date: 12/22/2010
Slimes Cell # 2
Sampler: Tanner Holliday
Garrin Palmer
12/13/2010 12/14/2010 12/15/2010 12/16/2010 12/17/2010 12/20/2010
600
700 29.10 17.50 15.08 14.06 13.32 11.58
800 27.75 17.37 15.04 14.04 13.31 11.58
900 26.70 17.24 15.00 14.01 13.30 11.58
1000 25.75 17.10 14.95 13.98 13.29
1100 24.90 16.93 14.87 13.93 13.26
1200 24.39 16.75 14.80 13.87 13.23
1300 23.70 16.65 14.73 13.83 13.19
1400 23.24 16.55 14.70 13.79 13.16
1500 22.62 16.43 14.68 13.76 13.12
1600
Comments: Report number is 11.58
Tab D
n ",
N
~ -
3
", en
C
al
::::s
N o o
U)
flO
N o ....-o
+ VI C1) .,
m" N
c: :::J C1) QJ .,
til C1) .,
m" ~
.-. 0"1 .-.
"""
Feet Below Top of Standpipe
.-. o 00 0"1 """ N o
-1--11-1/30/2009
2/28/2009
3/31/2009
-4/30/2009
-5/31/2009
6/30/2009
7/31/2009
8/31/2009
9/30/2009
10/31/2009
11/30/2009
12/31/2009
,-1/31/2010
2/28/2010
3/31/2010
4/30/2010
5/31/2010
6/30/2010
7/31/2010
8/31/2010
9/30/2010
10/31/2010
-11/30/2010
12/31/2010
Tab E
This attachment has been deliberately left blank.
Tab F
Cell 4A LOS monitoring information
Fourth Quarter 2010
October 2010
Date Measurements in Inches Flow Meter in Gallons
10/1/10 3.0 260850
10/8/10 4.4 260850
10/15/10 4.1 260850
10/22/10 7.0 260850
10/29/10 7.3 260850
Lowest level for the month was 3.0 inches. Total number of gallons pumped was O.
November 2010
Date
11/5/10
11/12/10
11/19/10
11/26/10
Measurements in Inches
7.7
7.7
8.3
8.4
Flow Meter in Gallons
260850
260850
260850
260850
Lowest level for the month was 6.9 inches. Total number of gallons pumped was O.
December 2010
Date Measurements in Inches Flow Meter in Gallons
12/3/10 8.9 260850
12/10/10 9.2 260850
12/17/10 9.0 260850
12/23/10 9.6 260850
12/31/10 9.4 260850
Lowest level for the month was 8.3 inches. Total number of gallons pumped was O.
For the 4th Quarter 2010, the lowest level was 3.0 inches and a total of 0 gallons were pumped.
Geosynt« Consultants Table 1A
Cllculated Action Leakage Rates for VlrIoU5 Head Conditions
Cell 4A, White Mesa Mill
B/andlng, Utah
Head Above Uner CIIlculated Action La ... Rate
System (feet) (plians/lcre/dQ)
5 222.04
10 314.0
15 384.58
20 444.08
2S 496.5
30 543.88
35 587.5
37 604.0
Tab G
This attachment has been deliberately left blank.