DRC-2010-003392 - 0901a0688018ee7c

DRC-2010-003392
Denlson Mines (USA) Corp.
1050 17th Street, Suite 950
Denver, CO 80265
USA
Tel: [phone]
Fax: [phone]
www.denisonmlnes.com
DENISO
MINES
Sent VIA Federal Express
May 28, 2010
Mr. Dane L. Finerfrock
Co-Executive Secretary
Utah Water Quality Board
State ofUtah Department of Environmental Quality
195 North 1950 West
Salt Lake City, UT 84114-4820
Re: Transmittal of 1st Quarter 2010 Nitrate Monitoring Report
UDEQ Docket No. UGW-09-03- White Mesa Uranium Mill
Dear Mr. Finerfrock:
Enclosed are two copies of the White Mesa Uranium Mill Nitrate Monitoring Report for the
1st Quarter of 2010 as required by the January 2009 Stipulated Consent Agreement, UDEQ Docket
No. UGW-09-03, as well as two CDs each containing a word searchable electronic copy of the report.
If you should have any questions regarding this report please contact me.
Yours very truly,
^ DENISON MINES (USA) CORP.
Jo Ann Tischler
Director, Compliance and Permitting
CC: Ron F. Hochstein
David C. Frydenlund
Harold R. Roberts
David E. Turk
DENISOJ)JJ
MINES
Sent VIA Federal Express
May 28,2010
Mr.Dane L.Finerfrock
Co-Executive Secretary
Utah Water Quality Board
State ofUtah Department of Environmental Quality
195 North 1950 West
Salt Lake City,UT 84114-4820
Re:Transmittal of 1st Quarter 2010 Nitrate Monitoring Report
UDEQ Docket No.UGW-09-03-White Mesa Uranium Mill
Dear Mr.Finerfrock:
Denison Mines (USA)Corp.
1050 17th Street,Suite 950
Denver,CO 80265
USA
Tel:[phone]
Fax:[phone]
www.denisonmines.com
Enclosed are two copies of the White Mesa Uranium Mill Nitrate Monitoring Report for the
1st Quarter of2010 as required by the January 2009 Stipulated Consent Agreement,UDEQ Docket
No.UGW-09-03,as well as two CDs each containing a word searchable electronic copy ofthe report.
If you should have any questions regarding this report please contact me.
Yours very truly,9~~
vDENISON MINES (USA)CORP.
JoAnn Tischler
Director,Compliance and Permitting
CC:Ron F.Hochstein
David C.Frydenlund
Harold R.Roberts
David E.Turk

White Mesa Uranium Mill

Nitrate Monitoring Report

State of Utah
Stipulated Consent Agreement, January 2009
Docket No. UGW09-03

1st Quarter
(January through March)
2010

Prepared by:

Denison Mines (USA) Corp.
1050 17th Street, Suite 950
Denver CO 80265

May 28, 2010
i
TABLE OF CONTENTS
1.0 INTRODUCTION................................................................................................. 1 

2.0 GROUNDWATER NITRATE MONITORING ................................................ 1 

2.1 Samples and Measurements Taken During the Quarter ..................................... 1 

2.1.1 Nitrate Monitoring ...................................................................................... 1 
2.1.2 Parameters Analyzed .................................................................................. 2 
2.1.3 Groundwater Head and Level Monitoring .................................................. 2 

2.2 Sampling Methodology and Equipment and Decontamination Procedures ....... 2 

2.2.1 Well Purging and Depth to Groundwater ................................................... 3 
2.2.2 Sample Collection ....................................................................................... 3 

2.3 Field Data ............................................................................................................ 4 

2.4  Depth to Groundwater Data and Water Table Contour Map .............................. 4 

2.5 Laboratory Results .............................................................................................. 5 

2.5.1 Copy of Laboratory Results ........................................................................ 5 
2.5.2 Regulatory Framework ............................................................................... 5 

3.0 QUALITY ASSURANCE AND DATA VALIDATION ................................... 5 

3.1 Field QC Samples ............................................................................................... 6 
3.2 Adherence to Mill Sampling SOPs ..................................................................... 6 
3.3 Analyte Completeness Review ........................................................................... 6 
3.4 Data Validation ................................................................................................... 6 

3.4.1 Field Data QA/QC Evaluation .................................................................... 6 
3.4.2 Holding Time Evaluation ............................................................................ 7 
3.4.3 Receipt Temperature Evaluation ................................................................. 7 
3.4.4 Analytical Method Checklist ...................................................................... 8 
3.4.5 Reporting Limit Evaluation ........................................................................ 8 
3.4.6 QA/QC Evaluation for Sample Duplicates ................................................. 8 

4.0 INTERPRETATION OF DATA ......................................................................... 9 

4.1 Interpretation of Groundwater Levels, Gradients and Flow Directions. ............ 9 

4.1.1 Current Site Groundwater Contour Map..................................................... 9 
4.1.2 Comparison of Current Groundwater Contour Maps to Groundwater
Contour Maps for Previous Quarter ............................................................ 9 
ii
4.1.3 Hydrographs .............................................................................................. 10 
4.1.4 Depth to Groundwater Measured and Groundwater Elevation ................. 10 

4.2 Review of Analytical Results............................................................................ 10 

4.2.1 Current Nitrate and Chloride Isoconcentration Maps ............................... 10 
4.2.2 Chloroform Concentration Trend Data and Graphs .................................. 10 
4.2.3 Interpretation of Analytical Data .............................................................. 10 

5.0 CORRECTIVE ACTION REPORT ................................................................. 11 

5.1 Identification and definition of the problem ..................................................... 11 
5.2 Assignment of Responsibility for Investigation the Problem ........................... 12 
5.3 Investigation and Determination of Cause of the Problem ............................... 12 
5.4 Determination of a Corrective Action to Eliminate the Problem ..................... 12 
5.5 Assigning and Accepting Responsibility for Implementing the Corrective
Action ............................................................................................................... 13 
5.6 Implementing the Corrective Action and Evaluating Effectiveness ................. 13 
5.7 Verifying That the Corrective Action Has Eliminated the Problem ................. 13 

6.0 CONCLUSIONS AND RECOMMENDATIONS ............................................ 13 

7.0 ELECTRONIC DATA FILES AND FORMAT .............................................. 14 

8.0 SIGNATURE AND CERTIFICATION ........................................................... 14 

iii
LIST OF TABLES
Table 1 Summary of Well Sampling and Constituents for the Period

INDEX OF TABS
Tab A Site Plan and Perched Well Locations White Mesa Site

Tab B Order of Sampling and Field Data Worksheets

Tab C Kriged Current Quarter Groundwater Contour Map and Depth to Water Data

Tab D Kriged Previous Quarter Groundwater Contour Map

Tab E Hydrographs of Groundwater Elevations Over Time for Nitrate Monitoring Wells

Tab F Depths to Groundwater and Elevations Over Time for Nitrate Monitoring Wells
(F-1 Correct Data, F-2 Incorrect Historic Data)

Tab G Laboratory Analytical Reports

Tab H Quality Assurance and Data Validation Tables

H-1 Field Data QA/QC Evaluation
H-2 Holding Time Evaluation
H-3 Receipt Temperature Evaluation
H-4 Analytical Method Check
H-5 Reporting Limit Evaluation
H-6 QA/QC Evaluation for Sample Duplicates
H-7 Rinsate Check
H-8 QC Control Limits for Analyses and Blanks

Tab I Kriged Current Quarter Nitrate and Chloride Isoconcentration Maps

Tab J Analyte Concentration Data Over Time

Tab K Nitrate and Chloride Concentration Trend Graphs

Tab L CSV Transmittal Letter
1
1.0 INTRODUCTION
The Utah Department of Environmental Quality (“UDEQ”) noted in a Request dated
September 30, 2008 (the “Request”), for a Voluntary Plan and Schedule to Investigate
and Remediate Nitrate Contamination at the White Mesa Uranium Mill (the “Mill”) (the
“Plan”) that nitrate levels have exceeded the State water quality standard of 10 mg/L in
certain monitoring wells. As a result of the Request, Denison Mines (USA) Corp.
(“DUSA”) entered into a Stipulated Consent Agreement (the “Agreement”) with the Utah
Water Quality Board in January 2009 which directed the preparation of a Nitrate
Contamination Investigation Report and Quarterly Nitrate Monitoring Reports. A
subsequent letter dated December 1, 2009, among other things, recommended that DUSA
also address elevated chloride concentration in the Nitrate Monitoring Reports.

This is the Quarterly Nitrate Monitoring Report, as required under the Agreement, State
of Utah Department of Environmental Quality (“UDEQ”) Docket No. UGW-09-03 for
the 2nd Quarter of 2009 (the “Quarter”)
2.0 GROUNDWATER NITRATE MONITORING
2.1 Samples and Measurements Taken During the Quarter

A map showing the location of all groundwater monitoring wells, piezometers, existing
wells, temporary chloroform contaminant investigation wells and temporary nitrate
investigation wells is attached under Tab A. Nitrate samples and measurements taken
during this reporting period (January through March 2010), are discussed in the
remainder of this section.

2.1.1 Nitrate Monitoring

Quarterly sampling for nitrate monitoring parameters was perfromed in the following
wells:

TWN-1 TWN-8 TWN-15
TWN-2 TWN-9 TWN-16
TWN-3 TWN-10 TWN-17
TWN-4 TWN-11 TWN-18
TWN-5 TWN-12 TWN-19
TWN-6 TWN-13 Upper Wildlife Pond (“UWLP”)
TWN-7 TWN-14 Piezometer 3

Table 1 provides an overview of all locations sampled during the current period, along
with the date samples were collected from each location, and the date(s) upon which
analytical data were received from the contract laboratory. Table 1 also identifies rinsate
samples collected, as well as sample numbers associated with any required duplicates.

2
As indicated in Table 1, nitrate monitoring was performed in all of the nitrate monitoring
wells, the Upper Wildlife Pond and Piezometer 3. Nitrate and chloride are also
monitored in all of the Mill’s groundwater monitoring wells and chloroform investigation
wells. Data from those wells for the Quarter are incorporated in certain of the maps and
figures in this report.
2.1.2 Parameters Analyzed

Locations sampled during this reporting period were analyzed for the following
constituents:

• Inorganic Chloride
• Nitrate plus Nitrite as Nitrogen

Use of analytical methods consistent with the requirements of the White Mesa Uranium
Mill Groundwater Quality Assurance Plan, Revision 6, March 22, 2010 (the “QAP”) was
confirmed for all analytes, as discussed later in this report.
2.1.3 Groundwater Head and Level Monitoring

Depth to groundwater was measured in the following wells and/or piezometers, pursuant
to Part I.E.3 of the Groundwater Discharge Permit (the “GWDP”):

• The quarterly groundwater compliance monitoring wells.
• Existing well MW-4 and all of the temporary chloroform investigation wells.
• Piezometers – P-1, P-2, P-3, P-4 and P-5.
• MW-20 and MW-22
• Nitrate monitoring wells.
• In addition to the above, depth to water measurements are routinely observed in
conjunction with sampling events for all wells sampled during quarterly and
accelerated efforts, regardless of the sampling purpose.

All well levels used for groundwater contour mapping were measured and recorded
within 5 calendar days of each other as indicated by the measurement dates in the
summary sheet under Tab C.

2.2 Sampling Methodology and Equipment and Decontamination Procedures

The QAP provides a detailed presentation of procedures utilized for groundwater
sampling activities under the GWDP.

The sampling methodology, equipment and decontamination procedures that were
performed for the nitrate contaminant investigation, as summarized below, are consistent
with the QAP.
3
2.2.1 Well Purging and Depth to Groundwater

A list of the wells in order of increasing nitrate contamination is generated quarterly. The
order for purging is thus established. The list is included with the Field Data Worksheets
under Tab B. Mill personnel start purging with all of the non-detect wells and then move
to the more contaminated wells in order of nitrate contamination, starting with the wells
having the lowest nitrate contamination.

Before leaving the Mill office, the pump and hose were decontaminated using the
cleaning agents described in Section 6.2.5 of the QAP. Mill personnel then proceed to
the first well which is the well indicating the lowest concentration of nitrate based on the
previous quarter’s sampling results. Well depth measurements are taken and the two
casing volumes are calculated (measurements are made using the same instrument used
for the monitoring wells under the Mill’s GWDP). The Grundfos pump (a 6 to 10 gpm
pump) is then lowered to the bottom of the well and purging is begun. At the first well,
the purge rate is established for the purging event by using a calibrated 5 gallon bucket.
After the evacuation of the first well has been completed, the pump is removed from the
well and the process is repeated at each well location moving from the least contaminated
to most contaminated well. All wells are capped and secured prior to leaving the
sampling location.

Decontamination of non-dedicated equipment, using the reagents in Section 6.2.5 of the
QAP, is performed between each sample location, and at the beginning of each sampling
day, in addition to the pre-event decontamination described above.
2.2.2 Sample Collection

Wells
Following the purging of a nitrate investigation well, the sampling takes place once
stabilization has been achieved in accordance with Section 6.2.7 of the QAP. Prior to
leaving the Mill office to sample, a cooler along with ice is prepared. A trip blank is not
required as the sampling event does not include analyses for Volatile Organic
Compounds (“VOCs”). Once Mill Personnel arrive at the well sites, labels are filled out
for the various samples to be collected. All personnel involved with the collection of
water and samples are then outfitted with rubber gloves to avoid sample contamination.

Each quarterly pumping and sample collection event begins at the location least affected
by nitrate (based on the previous quarter’s sampling event) and proceeds by affected
concentration to the most affected location. The dedicated portable pump is
appropriately decontaminated prior to each sampling event, each sampling day, and
between well samples, and the QA rinsate sample is collected after said decontamination
but prior to the sampling of the next sampling well. Purging practices are consistent with
the requirements of Section 6.2.7 of the QAP.

Samples are taken from the portable pump after stabilization has been achieved, unless
the well is pumped dry. If the well is pumped dry, Mill personnel use a disposable bailer
to sample the well after it has recovered in accordance with Section 6.2.7 of the QAP.
4
The bailer is attached to a reel of approximately 150 feet of nylon rope and then lowered
into the well. After coming into contact with the water, the bailer is allowed to sink into
the water in order to fill. Once full, the bailer is reeled up out of the well.

Sample bottles are filled as follows;

• First, a 250 ml sample is collected for nitrate/nitrite. This sample is not filtered,
but is preserved with H2SO4.

• Second, a 250 ml sample is collected for chloride. This sample is not filtered and
is not preserved.

After the samples have been collected for a particular well, the samples are placed into
the cooler that contains ice. The well is then recapped and Mill personnel proceed to the
next well. If a bailer has been used it is disposed of.

Ponds
Grab samples are taken from the UWLP using a disposable bailer. Sample bottles are
filled as per Section 2.2.2 above. After the samples are collected, the bailer is disposed of
and samples are placed into a cooler containing ice for sample preservation and transit to
the Mill’s contract analytical laboratory, Energy Laboratories (“EL”).

Piezometers
The Plan contemplates DUSA collecting samples from piezometers 2 and 3, if possible.
Samples are collected from piezometers using a disposable bailer following the
procedures described for wells that have been pumped dry, above. However, due to the
difficulty in obtaining samples from the peizometers, the purging protocols set out in the
QAP cannot always be followed.

After samples are collected, the bailer is disposed of and samples are placed into a cooler
containing ice for sample preservation and transit to the Mill’s contract analytical
laboratory, EL.

2.3 Field Data

Attached under Tab B are copies of all Field Data Worksheets that were completed
during the quarter for the nitrate contaminant investigation monitoring wells, piezometer,
and UWLP identified in Section 2.1.1 above, and Table 1.

2.4 Depth to Groundwater Data and Water Table Contour Map

Depth-to-groundwater measurements which were utilized for groundwater contours are
included on the Quarterly Depth to Water Sheet at Tab C of this Report along with the
kriged groundwater contour map for the current quarter generated from this data. A copy
of the kriged groundwater contour map generated from the 4th quarter of 2009 data is
provided under Tab D.
5
2.5 Laboratory Results
2.5.1 Copy of Laboratory Results

All analytical results were provided by EL. Table 1 lists the dates when analytical results
were reported to the QA Manager for each well or other sample.

Results from analysis of samples collected for the 1st quarter nitrate investigation are
provided under Tab G of this Report. Also included under Tab G are the results of
analyses for duplicate samples and rinsate samples for this sampling effort, as identified
in Table 1. See the Groundwater Monitoring Report and Chloroform Monitoring Report
for the First Quarter of 2010 for nitrate and chloroform analytical results for the
groundwater monitoring wells and chloroform investigation wells not listed in Table 1.
2.5.2 Regulatory Framework

As discussed in Section 1.0 above, the Request, Plan, and Agreement each triggered a
series of actions on DUSA’s part. Potential surficial sources of nitrate and chloride have
been described in a Source Review Report. Installation of 19 new monitoring wells has
allowed the nitrate and chloride plumes to be fully bounded at the site. This report
documents the continued monitoring consistent with the program described in the
December 30, 2009 Contamination Investigation Report and Initial Nitrate Monitoring
report.
3.0 QUALITY ASSURANCE AND DATA VALIDATION
The Mill QA Manager, which for the purposes of this Report was DUSA’s Director,
Compliance and Permitting, performed a Quality Assurance/Quality Control (“QA/QC”)
review to confirm compliance of the monitoring program with requirements of the QAP.
As required in the QAP, data quality assurance includes preparation and analysis of
quality control samples in the field, review of field procedures, an analyte completeness
review, and quality control review of laboratory data methods and data. Identification of
field QC samples collected and analyzed is provided in Section 3.1. Discussion of
adherence to Mill sampling Standard Operating Procedures (“SOPs”) is provided in
Section 3.2. Analytical completeness review results are provided in Section 3.3. The
steps and tests applied to check field data QA?QC, holding times, receipt temperature and
laboratory data QA/QC are discussed in Sections 3.4.1 through 3.4.7 below.

The analytical laboratory has provided summary reports of the analytical QA/QC
measurements necessary to maintain conformance with NELAC certification and
reporting protocol. The Analytical Laboratory QA/QC Summary Reports, including
copies of the Mill’s Chain of Custody and Analytical Request Record forms for each set
of Analytical Results, follow the analytical results under Tab G. Results of review of the
laboratory QA/QC information are provided under Tab H and discussed in Section 3.4,
below.

6
3.1 Field QC Samples

The following QC samples were generated by Mill personnel and submitted to the
analytical laboratory in order to assess the quality of data resulting from the field
sampling program.

Field QC samples for the nitrate investigation program consist of one field duplicate
sample for each 20 samples, one DI Field Blank (DIFB) and equipment rinsate samples.

During the 1st Quarter of 2010, two duplicate samples were collected as indicated in
Table 1. The duplicates were sent blind to the analytical laboratory and analyzed for the
same parameters as the nitrate wells.

Rinsates were also collected between well samples where nondedicated sampling
equipment was used. Rinsates were labeled with the name of the subsequently sampled
well with a terminal letter “R” added (e.g. TWN-7R). The results of these analyses are
included with the routine analyses under Tab G.

3.2 Adherence to Mill Sampling SOPs

On a review of adherence by Mill personnel to the existing sampling SOPs, the QA
Manager observed that QA/QC requirements established in the QAP were being adhered
to and that the SOP’s were implemented, except as described below.

3.3 Analyte Completeness Review

All analyses required by the GWDP for nitrate monitoring for the period were performed.

3.4 Data Validation

The QAP and GWDP identify the data validation steps and data quality control checks
required for the nitrate monitoring program. Consistent with these requirements, the
QA/QC Manager performed the following evaluations: a field data QA/QC Evaluation, a
holding time check, a recipt temperature check, an analytical method check, a reporting
limit check, a QA/QC evaluation of sample duplicates, a QA/QC evaluation of the DIFB
and an equipment rinsate sample check. Because no VOCs are analyzed for the nitrate
contamination investigation, no trip blanks are required in the sampling program. Each
evaluation is discussed in the following sections. Data check tables indicating the results
of each test are provided under Tab H.

3.4.1 Field Data QA/QC Evaluation

The QA Manager performs a review of all field recorded parameters to assess their
adherence with QAP requirements. The assessment involved review of two sources of
information: the Field Data Sheets and the Quarterly Depth to Water summary sheet.
Review of the Field Data Sheets addresses well purging volumes and stability of five
7
parameters: conductance, pH, temperature, redox potential, and turbidity. Review of the
Depth to Water data confirms that all depth measurements used for development of
groundwater contour maps were conducted within a five-day period of each other. The
results of this quarter’s review are provided under Tab H.

Based upon this review, all well locations conformed to the QAP requirement to evacuate
two well casing volumes before sampling except TWN-3, TWN-7, TWN-14, TWN-25,
and Piezometer 3. These four wells were all pumped to dryness before two casing
volumes were evacuated. In each case, representative samples of formation water were
collected after the wells were allowed to recover. Piezometer 3 was not pumped, and was
sampled directly after measurement of one set of parameters.

During review of the field data sheets, it was observed that sampling personnel
consistently recorded depth to water to the nearest 0.01 foot.

All field parameters for all wells were within the required RPD, except as follows.

Turbidity continues to vary widely based on multiple factors including natural variation,
sampling effects, and well condition. Eleven measurements exceeded the QAP’s 5 NTU
goal. DUSA’s letter to DRC of April 2, 2010 discusses why US EPA guidance and
source studies do not consider turbidity to be an appropriate parameter for assessing well
stabilization and/assuring collection of representative formation water and proposes a
Plan and Schedule to amend the QAP to address this issue. DUSA’s letter to DRC
proposing changes to the QAP, is in progress.

Conductivity exceeded the required RPD in TWN-17. DUSA’s letter to DRC proposing
changes to the QAP, addresses the stabilization of conductivity and other field
parameters, explaining that EPA guidance and source studies consider parameter
measurement as only one of several methods to assure collection of representative
formation water.
3.4.2 Holding Time Evaluation

QAP Table 1 identifies the method holding times for each suite of parameters. Sample
holding time checks are provided in Table H-2 under Tab H. All samples were received
and analyzed within the required holding time.
3.4.3 Receipt Temperature Evaluation

Chain of Custody sheets were reviewed to confirm compliance with the QAP requirement
in QAP Table 1 that samples be received at 6oF or lower. Sample temperatures checks
are provided in Table H-3 under Tab H. All samples were received within the required
temperature limit.
8
3.4.4 Analytical Method Checklist

All analytical methods reported by the laboratory were checked against the required
methods enumerated in the QAP. Analytical method checks are provided in Table H-4
under Tab H. All methods were consistent with the requirements of the QAP.
3.4.5 Reporting Limit Evaluation

All analytical method reporting limits reported by the laboratory were checked against
the reporting limits enumerated in the QAP. Reporting Limit Checks are provided in
table H-5 under Tab H. All analytes were measured and reported to the required
reporting limits, with the exception of three samples that had increased reporting limits
due to matrix interference. However, in all of those cases the analytical results were
greater than the reporting limit used..
3.4.6 QA/QC Evaluation for Sample Duplicates

All analytical results were within the 20% RPD acceptance limits for each of the two
duplicates and its associated well. Results of the RPD test are provided in table H-6
under Tab H.

3.4.7 Rinsate Check

Rinsate checks are provided in Table H-7 under Tab H. A review of the analytical results
reported for rinsate samples indicated that six of the rinsate samples had low levels of
nitrate. Five of the six had levels of 0.1 to 0.2 mg/L nitrate. The analysis of TWN-3R
yielded the single highest nitrate level of 1.7 mg/L.

A comparison of the rinsate concentration levels to the QAP requirements -- that rinsate
concentrations be one order of magnitude lower than that of the actual well -- indicated
that two of the rinsates, TWN-4R and TWN-12R, had concentrations of nitrate above this
conformance level.

The above findings suggest that nitrate present in the rinsate samples may be originating,
at least in part, from cross-contamination of sampling equipment from field samples.

However, based on the above findings, for this current quarter’s data, the presence of
nitrate in the rinsate samples does not affect the validity or utility of the groundwater data
for the following reasons:

• For the two wells in which the preceding rinsate levels exceeded the conformance
criterion, the nitrate concentrations in both of the wells and both rinsates were
significantly lower than the GWDP GWCL of 10.0 mg/L for nitrate.

• For all other rinsates with detections of nitrate, the nitrate level was relatively
low, ranging from 30 times to 620 times lower than the nitrate level in the
subsequently sampled well.
9

The QA Manager plans to implement a testing program to attempt to isolate the source(s)
which are introducing nitrate into the sampling and/or rinsate process. The planned
approach is discussed further in Section 6, below.

3.4.8 Other Laboratory QA/QC

Section 9.2 of the QAP requires that the laboratory’s QA/QC Manager check the
following items in developing of data reports: (1) sample preparation information is
correct and complete, (2) analysis information is correct and complete, (3) appropriate
Analytical Laboratory procedures are followed, (4) analytical results are correct and
complete, (5) QC samples are within established control limits, (6) blanks are within QC
limits, (7) special sample preparation and analytical requirements have been met, and (8)
documentation is complete. In addition to other laboratory checks described above,
DUSA’s QA/QC manager rechecks QC samples and blanks (items (5) and (6) to confirm
that the percent recovery for spikes and the relative percent difference for spike
duplicates are within the method-specific required limits, or that the case narrative
sufficiently explains any deviation from these limits. Results of this quantitative check
are provided in Table H-8 under Tab H. All lab QA/QC results met these requirements.
4.0 INTERPRETATION OF DATA
4.1 Interpretation of Groundwater Levels, Gradients and Flow Directions.
4.1.1 Current Site Groundwater Contour Map

As stated above, a listing of groundwater level readings for the current quarter (shown as
depth to groundwater in feet) is included under Tab C. The data from this tab has been
interpreted (kriged) and plotted in a water table contour map, provided under the same
tab. The contour map is based on the March 11, 2010 data for all wells.
4.1.2 Comparison of Current Groundwater Contour Maps to Groundwater
Contour Maps for Previous Quarter

The groundwater contour map for the Mill site for the fourth quarter of 2009, as
submitted with the Nitrate Monitoring Report for the fourth quarter of 2009, is attached
under Tab D.

A comparison of the water table contour map for the first quarter of 2010 to the water
table contour map for the previous quarter indicates similar patterns of drawdown related
to pumping of MW-4, MW-26 (TW4-15), TW4-19 and TW4-20 (pumping in TW4-4 had
not progressed enough to have impacted the progress of drawdown) under the Mill’s
chloroform investigation. Water levels and water level contours for the site have not
changed significantly since the last quarter, except for a few locations. Differences in
water level contours south of MW-4 are partly due to the start-up of pumping at TW4-4
under the Mill’s chloroform investigation.

10
A reported increase in water level of approximately 6 feet in well TWN-2 occurred, and
reported decreases of approximately 14 feet in well TWN-8, and 13 feet in well TWN-18
occurred. A reported decrease in water level of approximately 6 feet occurred in
chloroform pumping well MW-26 (TW4-15), and a reported increase in water level of
approximately 22 feet occurred in chloroform pumping well TW4-19. Water level
changes at other chloroform pumping wells were less than 5 feet.

Water level fluctuations at chloroform pumping wells MW-4, MW-26 (TW4-15), TW4-
4, TW4-19, and TW4-20 are due in part to fluctuations in pumping conditions just prior
to and at the time the measurements are taken. The largest decrease (increase in
drawdown) of approximately 6 feet occurred in well MW-26 (TW4-15) and the largest
increase (decrease in drawdown), of approximately 22 feet, occurred at TW4-19.
4.1.3 Hydrographs

Attached under Tab E are hydrographs showing groundwater elevation in each nitrate
contaminant investigation monitor well over time.
4.1.4 Depth to Groundwater Measured and Groundwater Elevation

Attached in Table F-1 under Tab F are tables showing depth to groundwater measured
and groundwater elevation over time for each of the wells listed in Section 2.1.1 above.
Previously published versions of these tables reported incorrect values for Water
Elevation (WL) in column 1 of each table. These errors have been corrected in the tables
in Tab F-1 in this Report. A full set of the previous uncorrected tables has also been
included under Tab F-2 for comparison.

4.2 Review of Analytical Results
4.2.1 Current Nitrate and Chloride Isoconcentration Maps

Included under Tab I of this Report are current nitrate and chloride iso-concentration map
for the Mill site. Nitrate iso-contours start at 5 mg/L and chloride iso-contours start at 5
mg/L because those values appear to separate the plumes from background.
4.2.2 Chloroform Concentration Trend Data and Graphs

Attached under Tab J is a table summarizing values for nitrate and chloride for each well
over time.

Attached under Tab K are graphs showing nitrate and chloride concentration trends in
each monitor well over time.
4.2.3 Interpretation of Analytical Data

Generally, the shapes of the nitrate and chloride plumes appear to be stable and
unchanged since the last quarter of 2009. The nitrate and chloride plumes maintain their
general geographic association, and it is still possible to separate the plumes into a
11
segment northeast of the wildlife ponds and a southwest segment near the Mill site.
Specific changes in chloride and nitrate concentrations from fourth quarter 2009 to first
quarter 2010 are best discussed by considering each segment separately.

In general, concentrations of both constituents in segments of the plumes northeast of the
wildlife ponds are within 30 percent of last quarter’s concentration or have substantially
declined. Chloride has declined by more than 40 percent in samples from TWN-13
TWN-15, and TWN-17. Nitrate has declined from 12 mg/L to 7.6 mg/L in samples from
TWN-9 and from 0.5 to non-detect in TWN-13. Exceptions are in samples from TWN-
10, where chloride concentrations increased from 26 mg/L in fourth quarter 2009 to 54
mg/L in first quarter 2010 and in samples from TWN-17 where nitrate concentrations
increased from 6.7 to 10.4 mg/L during the same time period. These changes are
considered to be within the general variability of groundwater data.

Concentrations in samples from the downgradient edge of the plumes (in the vicinity of
MW-30 and MW-31) have remained unchanged and the shapes of the plumes in the
southwest segment near the Mill site have remained stable. However, concentrations of
nitrate and chloride in samples from TWN-2 have increased noticeably. Nitrate
concentrations have increased from 20.8 mg/L in fourth quarter 2009 to 62.1 mg/L in first
quarter 2010. Chloride concentrations have increased from 55 mg/L in fourth quarter
2009 to 85 mg/L in first quarter 2010. Other wells have shown increases of more than 40
percent, TWN-4 (nitrate from 0.4 to 0.9 mg/L and chloride from 11 to 22 mg/L) and
TWN-7 (nitrate from 0.1 to 0.8 mg/L), but the magnitude of the increases are relatively
minor and are considered to be within the general variability of groundwater data.

Increased concentrations in samples from some wells in the southwest segment of the
plumes may be due to changes in groundwater flow direction as a result of pumping for
chloroform remediation or they may be due to the general variability of groundwater
data. However, in view of the stability in shape and extent of the plumes, the three fold
increase in nitrate concentration in samples from TWN-2 should be viewed as suspect
and a potential outlier, pending results of next quarter’s sampling.
5.0 CORRECTIVE ACTION REPORT
Necessary corrective actions identified during the current monitoring period are described
below.

5.1 Identification and definition of the problem

Stabilization of Parameters
Turbidity continues to vary widely based on multiple factors including natural variation,
sampling effects, and well condition. Eleven turbidity measurements exceeded the
QAP’s 5 NTU goal.

Conductivity exceeded the required RPD in TWN-17.

12
Rinsate Nitrate Levels
DI water used for decontamination continues to indicate presence of nitrates. Rinsate
samples generated from use of the DI for decontamination have nitrate levels and level
trends that may result, in part, from decontamination procedures, and potentially from
other factors.

5.2 Assignment of Responsibility for Investigation the Problem

Both problems are already under investigation by the QA Manager.

5.3 Investigation and Determination of Cause of the Problem

Stabilization of Parameters
Data continue to indicate that it may not be feasible to achieve either a turbidity level of
less than 5 NTU or a stabilized turbidity between any two measurements within 10%
RPD in every well. Discussions are underway with DRC to address the fact that it may
not be appropriate or feasible to achieve consistent turbidity levels or a turbidity level of
5 NTU in the Mill’s groundwater program wells under the current evacuation scheme,
and that other well purging approaches, such as micro-purging, may be more appropriate.
A letter report addressing modification of monitoring methods relative to turbidity issues,
submitted by DUSA to DRC on April 2, 2010, is currently under review by DRC.

DUSA’s letter to DRC, in progress, proposing changes to the QAP, addresses the
stabilization of conductivity and other field parameters, and explains why EPA guidance
and source studies consider parameter measurement as only one of several methods to
assure collection of representative formation water.

Rinsate Nitrate Levels
The QA Manager plans to implement a testing program to attempt to isolate the source(s)
which are introducing nitrates into the sampling and/or rinsate process. The QA Manager
plans an initial investigation focused on confirming or eliminating the following sources:

1. Potential of nitrates in DI water
2. Cross-contamination of sampling equipment from field samples

5.4 Determination of a Corrective Action to Eliminate the Problem

Stabilization of Parameters
A letter report addressing modification of monitoring methods relative to turbidity and
other issues related to stabilization of parameters, submitted by DUSA to DRC on April
2, 2010, is currently under review by DRC. DUSA is currently evaluating the suitability
of turbidity, as well as other parameters, in determining stabilization of monitoring wells,
and is preparing proposed changes to the QAP to address these issues.

13
Rinsate Nitrate Levels
A corrective action will be determined following completion of the analytical test results
and data review outlined above.

5.5 Assigning and Accepting Responsibility for Implementing the Corrective
Action

Stabilization of Parameters
It will be the responsibility of the Director, Compliance and Permitting to implement the
corrective action. Development of recommendations and proposed QAP changes to
address parameter stabilization as only one of multiple methods to ensure sampling of
representative formation water are already underway.

5.6 Implementing the Corrective Action and Evaluating Effectiveness

Stabilization of Parameters
Implementation of the corrective action will follow development and DRC approval of an
action plan for well purging, as discussed in Section 3.41.

Rinsate Nitrate Levels
It will be the joint responsibility of the Director, Compliance and Permitting, and the
Mill’s sampling staff to implement the isolation testing and whichever actions result from
its findings.

5.7 Verifying That the Corrective Action Has Eliminated the Problem

Stabilization of Parameters
Verification will occur following DRC review and approval of the proposed revisions to
the QAP and proposal for field testing of approaches to collect representative formation
water.

Rinsate Nitrate Levels
Implementation to remove the nitrate source(s) will occur after isolation testing identifies
the source(s).
6.0 CONCLUSIONS AND RECOMMENDATIONS
Generally, the shapes of the nitrate and chloride plumes appear to be stable and
unchanged since the last quarter of 2009. In general, concentrations of both constituents
in segments of the plumes northeast of the wildlife ponds are within 30 percent of last
quarter’s concentration or have substantially declined. Chloride has declined by more
than 40 percent in samples from TWN-13 TWN-15, and TWN-17. Nitrate has declined
from 12 mg/L to 7.6 mg/L in samples from TWN-9 and from 0.5 to 0.1 in TWN-13.

Concentrations in samples from the downgradient edge of the plumes (in the vicinity of
MW-30 and MW-31) have remained unchanged and the shapes of the plumes in the
southwest segment near the mill site have remained stable. However, concentrations of
nitrate and chloride in samples from TWN-2 have increased noticeably. Increased
concentrations in samples from some wells in the southwest segment of the plumes may
be due to changes in groundwater flow direction as a result of pumping for chloroform
remediation or they may be due to the general variability of groundwater data.However,
in view ofthe stability in shape and extent ofthe plumes,the three fold increase in nitrate
concentration in samples from TWN-2 should be viewed as suspect and a potential
outlier,pending results of next quarter's sampling.
The current quarter's data continue to support the conclusions in the Nitrate Contaminatin
Investigation Report that a)the nitrate and chloride are co-extensive and appear to
originally come from the same source;and b)the source is upgt'adient of the Mill
property more than 1.2 miles from the Mill facility,and is not the result of Mill activities.
7.0 ELECTRONIC DATA FILES AND FORMAT
DUSA has provided to the Executive Secretary an electronic copy of all laboratory
results for groundwater quality monitoring conducted under the nitrate contaminant
investigation during the Quarter,in Comma Separated Values (CSV)format.A copy of
the transmittal e-mail is included under Tab L.
8.0 SIGNATURE AND CERTIFICATION
This document was prepared by Denison Mines (USA)Corp.on May 28,2010.
DENISON MINES (USA)CORP.
David C.Frydenlund
Vice President,Regulatory Affairs and Counsel
14
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 infOlmation submitted is,to the
best of my knowledge and belief,true,accurate,and complete.I am aware that there are
significant penalties for submitting false information,including the possibility offine and
imprison nt fI knowing violations.
D la .Fr denlund
VIce President,Regulatory Affairs and Counsel
Denison Mines (USA)Corp.
15
Table 1: Summary of Well Sampling and Constituents for the Period
Well Sample Collection Date Date of Lab Report
Piezometer 3 3/24/10 13:34 4/5/2010
TWN-1 3/17/10 9:02 3/29/2010
TWN-1R 3/17/10 8:40 3/29/2010
TWN-2 3/24/10 8:17 4/5/2010
TWN-2R 3/24/10 7:53 4/5/2010
TWN-3 3/25/10 9:15 4/5/2010
TWN-3R 3/24/10 8:51 4/5/2010
TWN-4 3/16/10 15:09 3/29/2010
TWN-4R 3/16/10 14:48 3/29/2010
TWN-5 3/16/10 14:09 3/29/2010
TWN-5R 3/16/10 13:43 3/29/2010
TWN-6 3/23/10 8:43 4/5/2010
TWN-6R 3/23/10 8:17 4/5/2010
TWN-7 3/17/10 8:13 3/29/2010
TWN-7R 3/16/10 11:52 3/29/2010
TWN-8 3/16/10 11:15 3/29/2010
TWN-8R 3/16/10 10:00 3/29/2010
TWN-9 3/23/10 15:07 4/5/2010
TWN-9R 3/23/10 14:48 4/5/2010
TWN-10 3/23/10 9:29 4/5/2010
TWN-10R 3/23/10 9:09 4/5/2010
TWN-11 3/17/10 14:34 3/29/2010
TWN-11R 3/17/10 14:08 3/29/2010
TWN-12 3/17/10 9:58 3/29/2010
TWN-12R 3/17/10 9:30 3/29/2010
TWN-13 3/17/10 10:52 3/29/2010
TWN-13R 3/17/10 10:35 3/29/2010
TWN-14 3/24/10 10:50 4/5/2010
TWN-14R 3/23/10 10:03 4/5/2010
TWN-15 3/18/10 8:35 3/29/2010
TWN-15R 3/17/10 13:17 3/29/2010
TWN-16 3/17/10 12:44 3/29/2010
TWN-16R 3/17/10 11:25 3/29/2010
TWN-17 3/24/10 11:05 4/5/2010
TWN-17R 3/23/10 10:57 4/5/2010
TWN-18 3/17/10 15:32 3/29/2010
TWN-18R 3/17/10 15:07 3/29/2010
TWN-19 3/23/10 14:13 4/5/2010
TWN-19R 3/23/10 13:25 4/5/2010
TWN-60 (DI Blank) 3/25/10 9:15 4/5/2010
TWN-65 (Duplicate of TWN-19) 3/23/10 14:13 4/5/2010
TWN-70 (Duplicate of TWN-14) 3/24/10 10:50 4/5/2010
UWLP 3/18/10 9:00 3/29/2010
Note: All wells were sampled for Nitrate and Chloride
UWLP is a sample from the Upper Wildlife Pond
INDEX OF TABS

Tab A Site Plan and Perched Well Locations White Mesa Site
Tab B Order of Sampling and Field Data Worksheets
Tab C Kriged Current Quarter Groundwater Contour Map and Depth to Water Data
Tab D Kriged Previous Quarter Groundwater Contour Map
Tab E Hydrographs of Groundwater Elevations Over Time for Nitrate Monitoring Wells
Tab F Depths to Groundwater and Elevations Over Time for Nitrate Monitoring Wells (F-1 Correct
Data, F-2 Incorrect Data)
Tab G Laboratory Analytical Reports
Tab H Quality Assurance and Data Validation Tables
H-1 Field Data QA/QC Evaluation
H-2 Holding Time Evaluation
H-3 Receipt Temperature Check
H-4 Analytical Method Check
H-5 Reporting Limit Evaluation
H-6 QA/QC Evaluation for Sample Duplicates
H-7 Rinsate Check
H-8 QC Control Limits for Analyses and Blanks
Tab I Kriged Current Quarter Nitrate Isoconcentration Map
Tab J Analyte Concentration Data Over Time
Tab K Nitrate Concentration Trend Graphs
Tab L CSV Transmittal Letter

Tab A
Site Plan and Perched Well Locations White Mesa Site

HYDRO
GEO
CHEM, INC.APPROVED DATE REFERENCE FIGURE
CELL NO. 2
CELL NO. 4A
3332
MW-21

3000
BOUNDARY
PROPERTY
SCALE IN FEET
0
CELL NO. 1
MILL SITE
MW-01
MW-02
MW-03
MW-05
MW-11
MW-12
MW-14
MW-15
MW-16
MW-17
MW-18
MW-19
MW-20
MW-22
MW-23
MW-24
MW-25
MW-27
MW-28
MW-29
MW-30
MW-31
MW-32
PIEZ-1
PIEZ-2
PIEZ-3
PIEZ-4
PIEZ-5
MW-26
TW4-1
TW4-2
TW4-3
TW4-4
TW4-5
TW4-6
TW4-9
TW4-11
TW4-12
TW4-13
TW4-14
TW4-16
TW4-18
TW4-20
TW4-21
MW-04TW4-7 TW4-8
TW4-10
TW4-22
TW4-19
TW4-23
TW4-24
TW4-25
TWN-1
TWN-2
TWN-3
TWN-4
TWN-5
TWN-6
TWN-7
TWN-8
TWN-9
TWN-10
TWN-11 TWN-12
TWN-13
TWN-14
TWN-15
TWN-16
TWN-17
TWN-18
TWN-19
MW-20
PIEZ-1
perched monitoring well
temporary perched monitoring
well installed April, 2005
perched piezometer
MW-31
temporary perched monitoring well
perched monitoring well
installed April, 2005
SITE PLAN
AND PERCHED WELL LOCATIONS
WHITE MESA SITE
H:/718000/may10/welloc.srf
TW4-19
TW4-20
EXPLANATION
temporary perched monitoring well
installed May, 2007
TW4-23
wildlife pond
SJS
temporary perched nitrate
monitoring well
TWN-1

Tab B
Order of Sampling and Field Data Worksheets

Nitrate Order
1st Quarter 2010
Nitrate Samples Rinsate Samples
Name Nitrate Mg/L Date/Purge sample Depth Totai Depth Name Date Sample
TWN-8 NO~,"r>-@ i~.ii5 P"'jA-.«TWN-7 10.1
TWN-5 0.2
TWN-4 0.4
TWN-l 0.5
TWN-12 0.5
TWN-13 0.5
TWN-16 1
11'TWN-15 1.1
TWN-ll 1.3
TWN-18 1.3
TWN-6 1.4
TWN-lO 1.4
TWN-9 12
TWN-2 20.8
-?t'TWN-3 29
"'P-ie-z<t 7.4
.e.ltu;-2-0,6
Piez S 1.2
wildlife ND
'1NiV,t o .1~~.
13/n'/l()lilt.:s;l..J,Cf 145.5
'"7".01:.
I'UMI'IIO -)11 cY,,-,"..,;N.XI 105
1iY'l,'-j'7
~V /."0 ilit-A --7f)l:J~150
q241
I~/i?ji()P:'I,q 3(;.Cf'f 125.7
41,4'1
1'7l,/1'7/111 DCID2 \..\1.'Is",112.5
-,/q"
"..117'/11)OGi'*"\)U"-110
.:Acn
?.Ii711/)10-':''2 '-\7,i c.:120
'.<.~.b'-'
'o,i nil"\<;l4'-\4'1.o',;l,.100
4£1_x\
i:>,];$()In f1l<....b '-/2 etC,155
10:;1.·ILie.m It/>itl'1fl "'TO.i:l.142
~.4f,
ivi11!'/)i..;'\-:J t:st.'<G 145
?,':I"~,,
,~...,..,0&4:",1'-1.G'3 130
II,'lie.
..ID.VID Dq:l&\KI.1:1.105
.qll.~l.i
i":/Y3llfJ ~.qE>135
i3/Jl IIIIJ -\1\2.1(,Ih.?-l6
,'?,jJ;If}JIll,';'\t:..I't 'I.t 110
i7,!?'IIII I()"l.lj{'t.":-tlt/
3 I~'5,,>.gfl '110
~'1 q'f -.<;1
"'(\1 (.-l.iJ!,97
'..'-",,{\
l'-<12/111/\1)/(/7-il.(.IJX 96
q:J.15
l'Z,/fllf /II J fJlJ/-f''~'.<;'2 96
4'11-'11/
A/i.<l
1i1J
l'i'I.7'(IIO 133Cf 3'5.6%
i'.1.,/I Ifl)Oqoo
41,04
TWN-8R
TWN-7R
TWN-4R
TWN-1R
TWN-12R
TWN-13R
TWN-16R
TWN-1SR
TWN-11R
TWN-l0R
TWN-14R
TWN-17R
TWN-19R
TWN-9R
TWN-2R
TWN-3R
Samplers:
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Tab C
Kriged Current Quarter Groundwater Contour Map and Depth to Water Summary

HYDRO
GEO
CHEM, INC.APPROVED DATE REFERENCE FIGURE
3332
3000
SCALE IN FEET
0
5582
5503
5472
5503
5521
5501
5494
5494
5499
5587
5604
5458
5450
5498
5507
5537
5577
5543
5512
5538
5547 5557
5558
5584
5546
5586
5538
5584
5578
5565
5586
5572
5523
5544
5560
5548
55855571
5564
5583
5574
5593
5612
5602
5543
5541
MW-01
MW-02
MW-03
MW-05
MW-11
MW-12
MW-14
MW-15
MW-17
MW-18
MW-19
MW-20
MW-22
MW-23
MW-24
MW-25
MW-27
MW-28
MW-29
MW-30
MW-31

MW-26

MW-32
TW4-19

PIEZ-1
PIEZ-2
PIEZ-3
PIEZ-4
PIEZ-5
5546
5555 5555MW-04
5541
5569
5600

TWN-3
TWN-4
TWN-5
TWN-6
TWN-7
TWN-8
TWN-9
TWN-10
TWN-11 TWN-12
TWN-13
TWN-14
TWN-15
TWN-16
TWN-17
TWN-18
TWN-19
5603
5605
5585
5590
5560
5590
5583
5585
5615 5630
5587
5587
5584
5604
5606
5587
5607
5601
5612
TWN-1
TWN-2
TW4-20
TW4-4
MW-22
PIEZ-1
5450
5593
perched monitoring well showing
elevation in feet amsl
temporary perched monitoring well installed
April, 2005 showing elevation in feet amsl
perched piezometer showing
elevation in feet amsl
5557
MW-31
5547
temporary perched monitoring well
showing elevation in feet amsl
5574
perched monitoring well installed April, 2005
showing elevation in feet amsl KRIGED 1st QUARTER, 2010 WATER LEVELS
WHITE MESA SITE
H:/718000/may10/wl0310.srf
EXPLANATION
temporary perched monitoring well installed
May, 2007 showing elevation in feet amsl5541 SJS
temporary perched nitrate
monitoring well showing
elevation in feet amsl
TWN-4
5605
NOTE: MW-4, MW-26, TW4-4, TW4-19 and TW4-20 are pumping wells
NAME:
800
DATE: 1530
TIME WELL I.D. DEPTH TIME WELL I.D. DEPTH TIME WELL I.D. DEPTH
1256 MW‐1 65.65 1017 MW‐4 76.25 1217 PIEZ‐1 62.25
1332 MW‐2 109.64 1021 TW4‐1 61.83 1212 PIEZ‐2 16.67
1439 MW‐3 83.17 1015 TW4‐2 66.85 1209 PIEZ‐3 35.82
1442 MW‐3A 85.24 1013 TW4‐3 48.60 1035 PIEZ‐4 48.61
1021 MW‐4 61.83 1024 TW4‐4 67.89 1042 PIEZ‐5 43.31
816 MW‐5 106.41 1010 TW4‐5 55.04
832 MW‐11 89.81 1027 TW4‐6 70.85 1156 TWN‐1 47.54
821 MW‐12 108.43 1018 TW4‐7 66.43 803 TWN‐2 14.24
828 MW‐14 103.76 1023 TW4‐8 66.75 1159 TWN‐3 31.60
825 MW‐15 106.40 1012 TW4‐9 53.59 1206 TWN‐4 36.56
1435 MW‐17 76.57 1009 TW4‐10 55.86 1301 TWN‐5 70.21
1253 MW‐18 70.75 844 TW4‐11 58.48 1246 TWN‐6 74.70
1214 MW‐19 50.61 1426 TW4‐12 38.35 1301 TWN‐7 89.72
1446 MW‐20 83.00 1427 TW4‐13 47.93 1249 TWN‐8 61.80
1451 MW‐22 67.10 1428 TW4‐14 89.79 1220 TWN‐9 64.53
814 MW‐23 113.91 849 TW4‐15 81.67 1243 TWN‐10 81.77
857 MW‐24 114.62 1510 TW4‐16 64.22 1235 TWN‐11 69.88
830 MW‐25 75.31 841 TW4‐17 76.74 1233 TWN‐12 37.97
849 MW‐26 81.67 1404 TW4‐18 56.02 1224 TWN‐13 46.87
1048 MW‐27 50.87 1516 TW4‐19 60.81 1226 TWN‐14 62.82
809 MW‐28 77.41 1007 TW4‐20 65.44 1240 TWN‐15 92.39
813 MW‐29 102.50 807 TW4‐21 56.54 1231 TWN‐16 48.86
839 MW‐30 76.91 1004 TW4‐22 55.12 1229 TWN‐17 35.30
840 MW‐31 69.31 1030 TW4‐23 66.22 1201 TWN‐18 58.09
841 MW‐32 76.74 1003 TW4‐24 55.97 1320 TWN‐19 54.14
805 TW4‐25 45.16
Comments: some of the times appear to be off a little bit, its due to using two different vehicles with which the 
clocks varied by about 15‐20 minutes. This was not identified until the event was done. So rather than change 
numbers to what we think they should have been the times will be left as recorded.
Quarterly Depth to Water 
Tanner Holliday MMHG: 
Start time:
3/11/2010 Finish Time: 

Tab D
Kriged Previous Quarter Groundwater Contour Map

HYDRO
GEO
CHEM, INC.APPROVED DATE REFERENCE FIGURE
3332
3000
SCALE IN FEET
0
5582
5503
5471
5502
5521
5501
5494
5493
5498
5587
5604
5458
5450
5498
5507
5537
5576
5543
5512
5537
5547 5557
5557
5583
5550
5585
5537
5583
5578
5565
5586
5571
5524
5549
5559
5548
55845548
5561
5580
5574
5593
5614
5600
5542
5541
MW-01
MW-02
MW-03
MW-05
MW-11
MW-12
MW-14
MW-15
MW-17
MW-18
MW-19
MW-20
MW-22
MW-23
MW-24
MW-25
MW-27
MW-28
MW-29
MW-30
MW-31

MW-26

MW-32
TW4-19

PIEZ-1
PIEZ-2
PIEZ-3
PIEZ-4
PIEZ-5
5551
5553 5554MW-04
5541
5569
5599

TWN-3
TWN-4
TWN-5
TWN-6
TWN-7
TWN-8
TWN-9
TWN-10
TWN-11 TWN-12
TWN-13
TWN-14
TWN-15
TWN-16
TWN-17
TWN-18
TWN-19
5603
5606
5585
5590
5559
5603
5583
5585
5614 5629
5587
5587
5584
5604
5606
5600
5607
5603
5607
TWN-1
TWN-2
TW4-20
MW-22
PIEZ-1
5450
5593
perched monitoring well showing
elevation in feet amsl
temporary perched monitoring well installed
April, 2005 showing elevation in feet amsl
perched piezometer showing
elevation in feet amsl
5556
MW-31
5547
temporary perched monitoring well
showing elevation in feet amsl
5574
perched monitoring well installed April, 2005
showing elevation in feet amsl KRIGED 4th QUARTER, 2009 WATER LEVELS
WHITE MESA SITE
H:/718000/feb10/wl1209c.srf
EXPLANATION
temporary perched monitoring well installed
May, 2007 showing elevation in feet amsl5541 SJS
temporary perched nitrate
monitoring well showing
elevation in feet amsl
TWN-4
5605

Tab E
Hydrographs of Groundwater Elevations Over Time for Chloroform Monitoring Wells

44.0
44.5
45.0
45.5
46.0
02
/
0
1
/
0
9
03
/
0
1
/
0
9
04
/
0
1
/
0
9
05
/
0
1
/
0
9
06
/
0
1
/
0
9
07
/
0
1
/
0
9
08
/
0
1
/
0
9
09
/
0
1
/
0
9
10
/
0
1
/
0
9
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
w M
e
a
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-1 Water Level Over Time (ft. blmp)
46.5
47.0
47.5
48.0
48.5
De
p
t
h

B
e
l
o
w
0.0
5.0
10.0
02
/
0
1
/
0
9
03
/
0
1
/
0
9
04
/
0
1
/
0
9
05
/
0
1
/
0
9
06
/
0
1
/
0
9
07
/
0
1
/
0
9
08
/
0
1
/
0
9
09
/
0
1
/
0
9
10
/
0
1
/
0
9
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
w M
e
a
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-2 Water Level Over Time (ft. blmp)
15.0
20.0
25.0
De
p
t
h

B
e
l
o
w
30.0
30.5
31.0
02
/
0
1
/
0
9
03
/
0
1
/
0
9
04
/
0
1
/
0
9
05
/
0
1
/
0
9
06
/
0
1
/
0
9
07
/
0
1
/
0
9
08
/
0
1
/
0
9
09
/
0
1
/
0
9
10
/
0
1
/
0
9
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
w M
e
a
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-3 Water Level Over Time (ft. blmp)
31.5
32.0
32.5
De
p
t
h

B
e
l
o
w
33.0
34.0
35.0
36.0
37.0
02
/
0
1
/
0
9
03
/
0
1
/
0
9
04
/
0
1
/
0
9
05
/
0
1
/
0
9
06
/
0
1
/
0
9
07
/
0
1
/
0
9
08
/
0
1
/
0
9
09
/
0
1
/
0
9
10
/
0
1
/
0
9
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-4 Water Level Over Time (ft. blmp)
38.0
39.0
40.0
41.0
De
p
t
h

B
e
l
o
w

M
69.9
70.0
70.1
70.2
70.3
08
/
0
1
/
0
9
09
/
0
1
/
0
9
10
/
0
1
/
0
9
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-5 Water Level Over Time (ft. blmp)
70.4
70.5
70.6
70.7
70.8
De
p
t
h

B
e
l
o
w

M
74.2
74.4
74.6
74.8
08
/
0
1
/
0
9
09
/
0
1
/
0
9
10
/
0
1
/
0
9
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-6 Water Level Over Time (ft. blmp)
75.0
75.2
75.4
75.6
De
p
t
h

B
e
l
o
w

M
86.0
88.0
90.0
92.0
08
/
0
1
/
0
9
09
/
0
1
/
0
9
10
/
0
1
/
0
9
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-7 Water Level Over Time (ft. blmp)
94.0
96.0
98.0
De
p
t
h

B
e
l
o
w

M
0.0
10.0
20.0
30.0
08
/
0
1
/
0
9
09
/
0
1
/
0
9
10
/
0
1
/
0
9
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-8 Water Level Over Time (ft. blmp)
40.0
50.0
60.0
70.0
De
p
t
h

B
e
l
o
w

M
64.0
64.2
64.4
64.6
64.8
08
/
0
1
/
0
9
09
/
0
1
/
0
9
10
/
0
1
/
0
9
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-9 Water Level Over Time (ft. blmp)
65.0
65.2
65.4
65.6
De
p
t
h

B
e
l
o
w

M
81.2
81.4
81.6
81.8
82.0
08
/
0
1
/
0
9
09
/
0
1
/
0
9
10
/
0
1
/
0
9
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-10 Water Level Over Time (ft. blmp)
82.2
82.4
82.6
82.8
83.0
De
p
t
h

B
e
l
o
w

M
69.0
69.5
70.0
70.5
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-11 Water Level Over Time (ft. blmp)
71.0
71.5
72.0
De
p
t
h

B
e
l
o
w

M
37.0
37.5
38.0
38.5
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-12 Water Level Over Time (ft. blmp)
39.0
39.5
40.0
40.5
De
p
t
h

B
e
l
o
w

M
46.6
46.7
46.8
46.9
47.0
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-13 Water Level Over Time (ft. blmp)
47.1
47.2
47.3
47.4
47.5
De
p
t
h

B
e
l
o
w

M
62.5
62.6
62.7
62.8
62.9
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-14 Water Level Over Time (ft. blmp)
63.0
63.1
63.2
63.3
63.4
De
p
t
h

B
e
l
o
w

M
76.0
78.0
80.0
82.0
84.0
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-15 Water Level Over Time (ft. blmp)
86.0
88.0
90.0
92.0
94.0
De
p
t
h

B
e
l
o
w

M
48.6
48.7
48.8
48.9
49.0
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-16 Water Level Over Time (ft. blmp)
49.1
49.2
49.3
49.4
De
p
t
h

B
e
l
o
w

M
35.1
35.2
35.2
35.3
35.3
35.4
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-17 Water Level Over Time (ft. blmp)
35.4
35.5
35.5
35.6
35.6
35.7
De
p
t
h

B
e
l
o
w

M
0.0
10.0
20.0
30.0
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-18 Water Level Over Time (ft. blmp)
40.0
50.0
60.0
70.0
De
p
t
h

B
e
l
o
w

M
53.6
53.8
54.0
54.2
54.4
11
/
0
1
/
0
9
12
/
0
1
/
0
9
01
/
0
1
/
1
0
02
/
0
1
/
1
0
03
/
0
1
/
1
0
Mea
s
u
r
i
n
g

P
o
i
n
t

(
f
t
.
)
TWN-19 Water Level Over Time (ft. blmp)
54.6
54.8
55.0
55.2
55.4
De
p
t
h

B
e
l
o
w

M

Tab F
Depths to Groundwater and Elevations Over Time for Groundwater Monitoring Wells
(F-1 Correct Data, F-2 Incorrect Historic Data)

F-1 Correct Data

Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,646.96 5,648.09 1.13 112.5
5,600.38 02/06/09 47.71 46.58
5,599.99 07/21/09 48.10 46.97
5,600.26 09/21/09 47.83 46.70
5,601.10 10/28/09 46.99 45.86
5,602.59 12/14/09 45.50 44.37
5,600.55 03/11/10 47.54 46.41
Water Levels and Data over Time
White Mesa Mill - Well TWN-1
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,625.75 5,626.69 0.94 95
5,611.37 02/06/09 15.32 14.38
5,610.63 07/21/09 16.06 15.12
5,609.73 9/21/2009 16.96 16.02
5,607.08 11/2/2009 19.61 18.67
5,606.57 12/14/2009 20.12 19.18
5,612.45 03/11/10 14.24 13.30
Water Levels and Data over Time
White Mesa Mill - Well TWN-2
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,633.64 5,634.50 0.86 110
5,603.77 02/06/09 30.73 29.87
5,602.37 7/21/2009 32.13 31.27
5,602.34 9/21/2009 32.16 31.30
5,602.60 10/28/2009 31.90 31.04
5,603.12 12/14/2009 31.38 30.52
5,602.90 03/11/10 31.60 30.74
Water Levels and Data over Time
White Mesa Mill - Well TWN-3
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,641.04 5,641.87 0.83 136
5,601.47 02/06/09 40.40 39.57
5,604.26 7/21/2009 37.61 36.78
5,605.02 9/21/2009 36.85 36.02
5,605.87 10/28/2009 36.00 35.17
5,605.81 12/14/2009 36.06 35.23
5,605.31 03/11/10 36.56 35.73
Water Levels and Data over Time
White Mesa Mill - Well TWN-4
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,653.70 5,655.18 1.48 155
5,584.43 08/25/09 70.75 69.27
5,584.51 9/21/2009 70.67 69.19
5,584.54 11/10/2009 70.64 69.16
5,584.62 12/14/2009 70.56 69.08
5,584.97 03/11/10 70.21 68.73
Water Levels and Data over Time
White Mesa Mill - Well TWN-5
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,663.03 5,664.94 1.91 135
5,589.52 08/25/09 75.42 73.51
5,589.46 9/22/2009 75.48 73.57
5,589.61 11/3/2009 75.33 73.42
5,589.92 12/14/2009 75.02 73.11
5,590.24 03/11/10 74.70 72.79
Water Levels and Data over Time
White Mesa Mill - Well TWN-6
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,647.39 5,649.26 1.87 120
5,552.56 08/25/09 96.70 94.83
5,558.34 9/21/2009 90.92 89.05
5,558.82 11/10/2009 90.44 88.57
5,558.96 12/14/2009 90.30 88.43
5,559.54 03/11/10 89.72 87.85
Water Levels and Data over Time
White Mesa Mill - Well TWN-7
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,649.35 5,651.48 2.13 160
5,589.01 08/25/09 62.47 60.34
5,589.10 9/21/2009 62.38 60.25
5,589.09 11/3/2009 62.39 60.26
5,603.38 12/14/2009 48.10 45.97
5,589.68 03/11/10 61.80 59.67
Water Levels and Data over Time
White Mesa Mill - Well TWN-8
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,645.68 5,647.45 1.77 102.5
5,582.05 08/25/09 65.40 63.63
5,582.12 9/22/2009 65.33 63.56
5,582.27 11/10/2009 65.18 63.41
5,582.53 12/14/2009 64.92 63.15
5,582.92 03/11/10 64.53 62.76
Water Levels and Data over Time
White Mesa Mill - Well TWN-9
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,664.63 5,666.98 2.35 107.5
5,584.18 08/25/09 82.80 80.45
5,584.40 9/22/2009 82.58 80.23
5,584.61 11/10/2009 82.37 80.02
5,584.90 12/14/2009 82.08 79.73
5,585.21 03/11/10 81.77 79.42
Water Levels and Data over Time
White Mesa Mill - Well TWN-10
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,683.16 5,684.53 1.37 147.5
5,613.00 11/03/09 71.53 70.16
5,613.88 12/14/2009 70.65 69.28
5,614.65 03/11/10 69.88 68.51
Water Levels and Data over Time
White Mesa Mill - Well TWN-11
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,667.03 5,668.24 1.21 115
5,628.33 11/03/09 39.91 38.70
5,628.86 12/14/2009 39.38 38.17
5,630.27 03/11/10 37.97 36.76
Water Levels and Data over Time
White Mesa Mill - Well TWN-12
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,633.04 5,634.32 1.28 120
5,586.95 11/03/09 47.37 46.09
5,587.22 12/14/2009 47.1 45.82
5,587.45 03/11/10 46.87 45.59
Water Levels and Data over Time
White Mesa Mill - Well TWN-13
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,647.80 5,649.53 1.73 135
5,586.18 11/04/09 63.35 61.62
5,586.51 12/14/2009 63.02 61.29
5,586.71 03/11/10 62.82 61.09
Water Levels and Data over Time
White Mesa Mill - Well TWN-14
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,675.01 5,676.49 1.48 155
5,594.12 11/10/09 82.37 80.89
5,584.03 12/14/2009 92.46 90.98
5,584.10 03/11/10 92.39 90.91
Water Levels and Data over Time
White Mesa Mill - Well TWN-15
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,651.07 5,652.70 1.63 100
5,603.34 11/04/09 49.36 47.73
5,603.56 12/14/2009 49.14 47.51
5,603.84 03/11/10 48.86 47.23
Water Levels and Data over Time
White Mesa Mill - Well TWN-16
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,639.73 5,641.55 1.82 100
5,605.96 11/04/09 35.59 33.77
5,606.27 12/14/2009 35.28 33.46
5,606.25 03/11/10 35.30 33.48
Water Levels and Data over Time
White Mesa Mill - Well TWN-17
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,643.95 5,645.45 1.50 100
5,586.85 11/02/09 58.60 57.10
5,600.14 12/14/2009 45.31 43.81
5,587.36 03/11/10 58.09 56.59
Water Levels and Data over Time
White Mesa Mill - Well TWN -18
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,659.59 5,661.36 1.77 110
5,606.17 11/02/09 55.19 53.42
5,606.70 12/14/2009 54.66 52.89
5,607.22 03/11/10 54.14 52.37
Water Levels and Data over Time
White Mesa Mill - Well TWN-19

F-2 Incorrect Historic Data

Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,646.96 5,648.09 1.13 112.5
5,577.74 02/06/09 47.71 46.58
5,577.35 07/21/09 48.10 46.97
5,577.62 09/21/09 47.83 46.70
5,578.46 10/28/09 46.99 45.86
5,579.95 12/14/09 45.50 44.37
Water Levels and Data over Time
White Mesa Mill - Well TN4-1
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitoring
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,625.75 5,626.69 0.94 95
5,610.13 02/06/09 15.32 14.38
5,609.39 07/21/09 16.06 15.12
5,608.49 9/21/2009 16.96 16.02
5,605.84 11/2/2009 19.61 18.67
5,605.33 12/14/2009 20.12 19.18
Water Levels and Data over Time
White Mesa Mill - Well TN4-2
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,633.64 5,634.50 0.86 110
5,594.72 02/06/09 30.73 29.87
5,593.32 7/21/2009 32.13 31.27
5,593.29 9/21/2009 32.16 31.3
5,593.55 10/28/2009 31.9 31.04
5,594.07 12/14/2009 31.38 30.52
Water Levels and Data over Time
White Mesa Mill - Well TN4-3
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,641.04 5,41.87 0.83 136
5,585.05 02/06/09 40.40 39.57
5,587.84 7/21/2009 37.61 36.78
5,588.60 9/21/2009 36.85 36.02
5,589.45 10/28/2009 36 35.17
5,589.39 12/14/2009 36.06 35.23
Water Levels and Data over Time
White Mesa Mill - Well TN4-4
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,653.70 5,655.18 1.48 155
5,554.70 08/25/09 70.75 69.27
5,554.78 9/21/2009 70.67 69.19
5,554.81 11/10/2009 70.64 69.16
5,554.89 12/14/2009 70.56 69.08
Water Levels and Data over Time
White Mesa Mill - Well TN4-5
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,663.03 5,664.94 1.91 135
5,550.03 08/25/09 75.42 73.51
5,549.97 9/22/2009 75.48 73.57
5,550.12 11/3/2009 75.33 73.42
5,550.43 12/14/2009 75.02 73.11
Water Levels and Data over Time
White Mesa Mill - Well TN4-6
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,647.39 5,649.26 1.87 120
5,528.75 08/25/09 96.70 94.83
5,534.53 9/21/2009 90.92 89.05
5,535.01 11/10/2009 90.44 88.57
5,535.15 12/14/2009 90.3 88.43
Water Levels and Data over Time
White Mesa Mill - Well TN4-7
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,649.35 5,651.48 2.13 160
5,562.98 08/25/09 62.47 60.34
5,563.07 9/21/2009 62.38 60.25
5,563.06 11/3/2009 62.39 60.26
5,577.35 12/14/2009 48.1 45.97
Water Levels and Data over Time
White Mesa Mill - Well TN4-8
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,645.68 5,647.45 1.77 102.5
5,560.05 08/25/09 65.40 63.63
5,560.12 9/22/2009 65.33 63.56
5,560.27 11/10/2009 65.18 63.41
5,560.53 12/14/2009 64.92 63.15
Water Levels and Data over Time
White Mesa Mill - Well TN4-9
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,664.63 5,666.98 2.35 107.5
5,542.65 08/25/09 82.80 80.45
5,542.87 9/22/2009 82.58 80.23
5,543.08 11/10/2009 82.37 80.02
5,543.37 12/14/2009 82.08 79.73
Water Levels and Data over Time
White Mesa Mill - Well TN4-10
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,683.16 5,684.53 1.37 147.5
5,553.92 11/03/09 71.53 70.16
5,554.80 12/14/2009 70.65 69.28
Water Levels and Data over Time
White Mesa Mill - Well TN4-11
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,667.03 5,668.24 1.21 115
5,585.54 11/03/09 39.91 38.70
5,586.07 12/14/2009 39.38 38.17
Water Levels and Data over Time
White Mesa Mill - Well TN4-12
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,633.04 5,634.32 1.28 120
5,578.08 11/03/09 47.37 46.09
5,578.35 12/14/2009 47.1 45.82
Water Levels and Data over Time
White Mesa Mill - Well TN4-13
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,647.80 5,649.53 1.73 135
5,562.10 11/04/09 63.35 61.62
5,562.43 12/14/2009 63.02 61.29
Water Levels and Data over Time
White Mesa Mill - Well TN4-14
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,675.01 5,676.49 1.48 155
5,543.08 11/10/09 82.37 80.89
5,532.99 12/14/2009 92.46 90.98
Water Levels and Data over Time
White Mesa Mill - Well TN4-15
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,651.07 5,652.70 1.63 100
5,576.09 11/04/09 49.36 47.73
5,576.31 12/14/2009 49.14 47.51
Water Levels and Data over Time
White Mesa Mill - Well TN4-16
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,639.73 5,641.55 1.82 100
5,589.86 11/04/09 35.59 33.77
5,590.17 12/14/2009 35.28 33.46
Water Levels and Data over Time
White Mesa Mill - Well TN4-17
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,643.95 5,645.45 1.50 100
5,566.85 11/02/09 58.60 57.10
5,580.14 12/14/2009 45.31 43.81
Water Levels and Data over Time
White Mesa Mill - Well TN4-18
Water
Elevation
(WL)
Land
Surface
(LSD)
Measuring
Point
Elevation
(MP)
Length Of
Riser (L)
Date Of
Monitorin
g
Total or
Measured
Depth to
Water
(blw.MP)
Total
Depth to
Water
(blw.LSD)
Total
Depth Of
Well
5,659.59 5,661.36 1.77 110
5,570.26 11/02/09 55.19 53.42
5,570.79 12/14/2009 54.66 52.89
Water Levels and Data over Time
White Mesa Mill - Well TN4-19

Tab G
Laboratory Analytical Reports

iihii&ENERGYLABORATORIES,INC.•2393SaltCreek Highway(82601)•PO.Box3258 •Casper,WY82602
....,.TollFree 888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com
ANALYTICAL SUMMARY REPORT
March 29,2010
Denison Mines USA Corp
6425 S Hwy 191
Blanding,UT 84511
Workorder No.:C10030674
Project Name:1st Quarter Nitrate
Energy Laboratories,Inc.received the following 24 samples for Denison Mines USA Corp on 3/19/2010 for analysis.
Sample ID ClientSample ID Collect Date Receive Date Matrix Test
C10030674-001 TWN-8R 03/16/10 10:00 03/19/10 Aqueous Chloride
Nitrogen, Nitrate +Nitrite
C10030674-002 TWN-7R 03/16/10 11 :52 03/19/10 Aqueous Same As Above
C10030674-003 TWN-5R 03/16/1013:43 03/19/10 Aqueous Same As Above
C10030674-004 TWN-4R 03/16/1014:4803/19/10 Aqueous Same As Above
C10030674-005 TWN-1R 03/17/1008:4003/19/10 Aqueous Same As Above
C10030674-006 TWN-12R 03/17/1009:30 03/19/10 Aqueous Same As Above
C10030674-OO7 TWN-13R 03/17/1010:3503/19/10 Aqueous Same As Above
C10030674-008 TWN-16R 03/17/10 11 :25 03/19/10 Aqueous Same As Above
C10030674-D09 TWN-15R 03M7M01~170Y19MO Aqueous Same As Above
C10030674-010 TWN-11R 03/17/10 14:08 03/19/10 Aqueous Same As Above
C10030674-011 TWN-18R 03/17/1015:0703/19/10 Aqueous Same As Above
C10030674-012 TWN-8 03/16/10 11 :15 03/19/10 Aqueous Same As Above
C10030674-013 TWN-7 03/17/1008:13 03/19/10 Aqueous Same As Above
C10030674-014 TWN-5 03/16/1014:09 03/19/10 Aqueous Same As Above
C10030674-015 TWN-4 03/16/10 15:09 03/19M 0 Aqueous Same As Above
C10030674-016 TWN-1 03/17/1009:02 03M9/10 Aqueous Same As Above
C10030674-017 TWN-12 03/17/1009:58 03/19/10 Aqueous Same As Above
C10030674-018 TWN-13 03/17/10 10:52 03/19/10 Aqueous Same As Above
C10030674-019 TWN-16 03/17/1012:44 03/19/10 Aqueous Same As Above
C10030674-020 TWN-15 03/18/10 08:35 03/19/10 Aqueous Same As Above
C1OO30674-021 TWN-11 03/17/1014:3403/19/10 Aqueous Same As Above
C10030674-022 TWN-18 03/17/1015:3203/19MO Aqueous Same As Above
C10030674-023 UWLP 03/18/10 09:00 03/19/10 Aqueous Same As Above
ENERGYLABORATORIES,INC.·2393Salt CreekHighway (82601)·PO Box3258 •Casper,WY82602III1M7011Free888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com
ANALYTICAL SUMMARY REPORT
C10030674-024 Temp Blank 03/18/1009:00 03119110 Aqueous Temperature
Any exceptions or problems with the analyses are noted in the laboratory Analytical Report,the QAlQC Summary
Report,or the Case Narrative.
The results as reported relate only to the item(s)submitted for testing.
Ifyou have any questions regarding these test results,please call.
Report Approved By:&'P,h4Ntie S\.U)~
Stephanie D.Waldrop \---
Reporting Supervisor
ENERGYLABORATORIES.INC.'2393Sah Creek Highway (82601)•P.O Box3258 •Casper,WY826021IIIIiI1_7b._11_A_r8_e_888._._2._'35._.o._'5_1_5_'_3<_'O_7._,2._l1._'5._05_1_5_'_Fax_3<_'O_7._.2._'34_._163._'9_'_C_'8_spe_r_@_e_'I7e_rg,._~_'!ab_.c_'a_m_._www.__.e_'f7,_e'!1_~_~_'8b_.ro_m _
LASORATORY ANALYTICAL REPORT
Client:
Site Name:
Denison Mines USA Corp
1st Quarter Nitrate Report Date:03/29/10
Lab 10:C10030674-001
Client Sample 10:TWN-8R
Matrix:Aqueous
Collection Date:03/1611010:00
DateReceived:03/19110
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab 10:C10030674-002
Client Sample 10:TWN-7R
Matrix:Aqueous
NO
NO
mg/L
mg/L
1
0.1
A4500-CI B 03/22/1009:38/dvg
E353.2 03/23/1012:261 jal
Collection Date:03/16/10 11:52
DateReceived:03/19/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab 10:C10030674-003
Client Sample 10:TWN-5R
Matrix:Aqueous
NO
NO
mg/L
mg/L
1
0.1
A450o-CI B 03/22/10 09:38 1dvg
E353.2 03/23/1012:291 jal
Collection Date:03/1611 0 13:43
DateReceived:03/19/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
----------------------------------------------
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab 10:C10030674-004
Client Sample 10:TWN-4R
Matrix:Aqueous
NO
NO
mg/L
mg/L
1
0.1
A4500-CI B 03/2211009:391 dvg
E353.2 03/23/10 12:311 jal
Collection Date:03/16/1014:48
DateReceived:03119/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date'By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
NO
0.2
rng/L
mg/L
1
0.1
A4500-CI B
E353.2
03/22110 09:41 1dvg
03/23/10 12:34 1jal
Report RL -Analyte reporting limit.
Definitions:QCL -Quality control limit.
MCL -Maximum contaminant tevel.
NO -Not detected at the reporting limit.
ENERGYLABORATORIES,INC.•2393 SaD CreekHighway (82601)•PO Box3258 •Casper,WY82602
7011Free 888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com..------------------------------------
LASORATORY ANALYTICAL REPORT
Client:
Site Name:
Denison Mines USA Corp
1st Quarter Nitrate Report Date:03129/10
Lab ID:C10030674-005
Client Sample ID:TWN-1 R
Matrix:Aqueous
Collection Date:03117/1008:40
DateReceived:03119/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
NO
NO
mglL
mg/L
1
0.1
A4500-CI B
E353.2
03/22110 09:42 1dvg
03/23/10 12:36 1jal
Lab ID:C10030674-006
Client Sample ID:TWN-12R
Matrix:Aqueous
Collection Date:03/17/1009:30
DateReceived:03119/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab ID:C10030674-007
Clien~ample ID:TWN-13R
Matrix:Aqueous
NO
0.1
mg/l
mg/l
1
0.1
A4500-CI B 03/22110 09:55 1dvg
E353.2 03123/10 12:46 1jal
Collection Date:03/17/1010:35
DateReceived:03/19/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
lab ID:C10030674-008
Client Sample ID:TWN-16R
Matrix:Aqueous
NO
NO
mg/l
mg/l
1
0.1
A4500-CI B 03/22/1009:561 dvg
E353.2 03/23/1012:491jal
Collection Date:03/17/10 11 :25
DateReceived:03/19/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
NO
NO
mg/l
mg/l
1
0.1
A4500-CI B
E353.2
03/22110 09:58 1dvg
03/23/1012:51 1jal
Report Rl -Analyte reporting limit.
Definitions:QCl-Quality control limit.
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
ENERGYLABORATORIES,INC••2393Salt CreekHighway (82601)'Po.Box3258 •Casper,WY82602
TollFree 888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com..------------------------------------
LASORATORY ANALYTICAL REPORT
Client:
Site Name:
Denison Mines USA Corp
1st Quarter Nitrate Report Date:03/29/10
lab 10:C10030674-009
Client Sample 10:TWN-15R
Matrix:Aqueous
Collection Date:03/17/1013:17
DateReceived:03/19/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
NO
NO
mg/L
mg/L
1
0.1
A4500-CI B
E353.2
03/22/10 09:59 1dvg
03/23/10 12:54 1jal
Lab 10:C10030674-010
Client Sample 10:TWN-11R
Matrix:Aqueous
Collection Date:03/17/1014:08
DateReceived:03119/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
lab 10:C10030674-011
ClientSample 10:TWN-18R
Matrix:Aqueous
NO
NO
mg/L
mg/L
1
0.1
A4500-CI B 03/22/1010:021 dvg
E353.2 03/23/1012:561jal
Collection Date:03/17/1015:07
DateReceived:03/19/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
NO
0.1
mg/L
mg/L
1
0.1
A4500-CI B
E353.2
03/22/1010:031 dvg
03/23/1013:041jal
lab 10:C10030674-012
Client Sample 10:TWN-8
Matrix:Aqueous
Collection Date:03/1611 0 11:15
DateReceived:03/19/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
11
NO
mg/L
mg/L
1
0.1
A4500-CI B 03/22110 10:051 dvg
E353.2 03/23/10 13:061jal
Report RL -Analyte reporting limit.
Definitions:QCL -Quality control limit.
MCL -Maximum contaminant level.
NO -Not detected at the reporting limit.
ENERGYLABORATORIES.INC.·2393Salt CreekHighway (82601)•Po.Box3258 •Casper,WY82602lllHli!/!j7 7011Free 888.235.0515 •301.235.0515 •Fax [phone] •casper@energy/ab.com·www.energylab.com....._---------
LASORATORY ANALYTICAL REPORT
Client:
Site Name:
Denison Mines USA Corp
1st Quarter Nitrate Report Date:03/29/10
Lab 10:C10030674-013
Client Sample 10:TWN-7
Matrix:Aqueous
Collection Date:0311711008:13
OateReceived:03/19/10
Analyses Result Units Qualifiers Rl
MCU
QCl Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab 10:C10030674-014
Client Sample 10:TWN-5
Matrix:Aqueous
6
0.8
mg/L
mg/L
1
0.1
A4500-CI B 03122/10 10:081dvg
E353.2 03/23/10 13:091jal
Collection Date:03116/1014:09
OateReceived:03/1911 0
Analyses Result Units Qualifiers Rl
MCU
QCl Method Analysis Date1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
43
0.3
mg/L
mg/L
1
0.1
A4500-CI B
E353.2
03/2211010:141 dvg
03/23/10 13:11 1jal
Lab 10:C10030674-015
Client Sample 10:TWN-4
Matrix:Aqueous
Collection Date:03/16/1015:09
OateReceived:03/19/10
Analyses Result Units Qualifiers Rl
MCU
QCl Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
22
0.9
mg/L
mg/L
1
0.1
A4500-CI B
E353.2
03/22/1010:261 dvg
03/23/10 13:14 1jal
Lab 10:C10030674-016
Client Sample 10:TWN-1
Matrix:Aqueous
Collection Date:03/17/1009:02
OateReceived:03/19/10
Analyses Result Units Qualifiers RL
MCU
QCl Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
17
0.5
mglL
mglL
1
0.1
A450o-CI B
E353.2
03/2211010:361 dvg
03/23/10 13:24 1jal
Report RL -Analyte reporting limit.
Definitions:QCL -Quality control limit.
MCL -Maximum contaminant level.
NO -Not detected at the reporting limit.
IlIJiJfIi(ENERGYLABORATORIES,INC••2393Sah CreekHighway(82601)•P.O Box3258 •Casper,WY82602
7011Free 888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com
LABORATORY ANALYTICAL REPORT
Client:
Site Name:
Denison Mines USA Corp
1st Quarter Nitrate Report Date:03/2911 0
Lab 10:C10030674-017
Client Sample 10:TWN-12
Matrix:Aqueous
Collection Date:03/17/1009:58
OateReceived:03/19/10
Analyses Result Units Qualifiers Rl
MCU
QCl Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab 10:C10030674-018
Client Sample 10:TWN-13
Matrix:Aqueous
113 mg/L
0.7 mg/L
1
0.1
A4500-CI B 03/22110 10:381 dvg
E353.2 03/23/1013:261 jal
Collection Date:03/17/1010:52
OateReceived:03/19/10
Analyses Result Units Qualifiers Rl
MCU
QCl Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab 10:C10030674-019
Client Sample 10:TWN-16
Matrix:Aqueous
47
NO
mg/L
mg/L
1
0.1
A4500-CI B 03/22/1010:391 dvg
E353.2 03/23/10 13:29 1jal
Collection Date:03/17/1012:44
OateReceived:03/19/10
Analyses Result Units Qualifiers Rl
MCU
QCl Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab 10:C10030674-020
ClientSample 10:TWN-15
Matrix:Aqueous
35
1.2
mg/L
mg/L
1
0.1
A4500-CI B 03/22/1010:411 dvg
E353.2 03/23/1013:31/jal
Collection Date:03/1811008:35
OateReceived:03/19/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
43
0.7
mg/L
mg/L
1
0.1
A4500-CI B 03/22/1010:431 dvg
E353.2 03/23/1013:341jal
Report RL -Analyte reporting limit.
Definitions:QCL -Quality control limit.
MCL -Maximum contaminant level.
NO -Not detected at the reporting limit.
ENERGYLABORATORIES.INC••2393Sah Creek Highway(82601)•PO.Box3258 •Casper,WY82602~TO//Free 888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energy/ab.com....._----------
LASORATORY ANALYTICAL REPORT
Client:
Site Name:
Denison Mines USA Corp
1st Quarter Nitrate Report Date:03/29/10
Lab 10:C10030674-021
Client Sample 10:TWN-11
Matrix:Aqueous
Collection Date:03/17/1014:34
OateReceived:03/19/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
73
1.4
mg/l
mg/l
1
0.1
A4500-CI B
E353.2
03/2211010:441 dvg
03/23/10 13:44 I jal
Lab 10:C10030674-022
Client Sample 10:TWN-18
Matrix:Aqueous
Collection Date:03/17/1015:32
OateReceived:03119/10
Analyses Result Units Qualifiers Rl
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
42
1.6
mg/l
mg/l
1
0.1
A4500-CI B
E353.2
03/22110 10:46 1dvg
03/23/10 13:46 1jal
Lab 10:C10030674-023
Client Sample 10:UWLP
Matrix:Aqueous
Collection Date:03/18/10 09:00
OateReceived:03/19/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
ND
NO
mg/l
mg/l
1
0.1
A4500-CI B
E353.2
03/22/1010:471 dvg
03/23/1013:491 jal
Lab 10:C10030674-024
ClientSample 10:Temp Blank
Matrix:Aqueous
Collection Date:03/18/10 09:00
DateReceived:03/19/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
PHYSICAL PROPERTIES
Temperature
Report Rl-Analyte reporting limit.
Definitions:QCl-Quality control limit.
3.0 ·C E170.1
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
03/19/1009:201 ha
~ENERGYLABORATORIES,INC••2393 San Creek Highway (82601)•p.D.Box 3258 •Casper,WY82602
....._70_{/_A_'ee_B._'B._'8._.2._'35._._05_'_5_._3_0_7._.2._:1._'5._05_'_5_._Fax_3_0_7._.2._'34._._163._'9_'_C8_'S._pe_'_@_8_f1,_ell_YYi_i8_0_.CG._m_._www.__.e_'f1_ell_y._~I._'8b_._ca_m _
QA/QC Summary Report
Client:Denison Mines USA Corp
Project:1st Quarter Nitrate
Report Date:03/29/10
Work Order:C10030674
Analyte Count Result Units RL "IoREC Low Limit High Limit RPO RPOLImit Qual
Method:A4500-C1 B
Sample 10:MBLK9-100322A
Chloride
Method Blank
NO mglL
Batch:100322A-CL-TTR-W
Run:TITRATION_100322A 03/22110 09:20
0.4
Sample 10:C100521-002AMS
Chloride
Sample 10:C100521-002AMSO
Chloride
Sample 10:C10030674-015AMS
Chloride
Sample 10:C10030674-015AMSO
Chloride
Sample 10:LCS35-100322A
Chloride
Sample 10:C10030674-020AMS
Chloride
Sample 10:C10030674-020AMSO
Chloride
Qualifiers:
RL -Analyte reporting limit.
Sample Matrix Spike
379 mg/L
Sample Matrix Spike Duplicate
375 mg/L
Sample Matrix Spike
196 mg/L
Sample Matrix Spike Duplicate
196 mg/L
Laboratory Control Sample
3580 mg/L
Sample Matrix Spike
389 mg/L
Sample Matrix Spike Duplicate
393 mg/L
Run:TITRATION_1 00322A
1.0 107 90 110
Run:TITRATION_1 00322A
1.0 106 90 110
Run:TITRATION_100322A
1.0 98 90 110
Run:TITRATION_100322A
1.0 98 90 110
Run:TITRATION_100322A
1.0 101 90 110
Run:T1TRATION_100322A
1.0 98 90 110
Run:TITRATION_100322A
1.0 98 90 110
NO -Not detected at the reporting limit.
0.9
o
0.9
03/22/1009:48
03/22/10 09:54
10
03/22/10 10:27
03/22/10 10:28
10
03/22/1010:31
03/2211010:51
03/2211010:51
10
NnrtitV ENERGYLABORATORIES.INC.•2393Sah Creek Highway(82601)•Po.Box 3258 •Casper,WY82602
.....lOllFree 888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com
QA/QC Summary Report
Client:Denison Mines USA Corp Report Date:03/29110
Project:1st Quarter Nitrate Work Order:C10030674
Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual
Method:E353.2 Batch:R130899
Sample 10:MBLK-1 Method Blank Run:TECHNICON_100323A 03/23/10 12:21
Nitrogen,Nitrate+Nitrite as N NO mg/L 0.03
Sample 10:LCS-2 Laboratory Control Sample Run:TECHNICON_100323A 03/23/1012:24
Nitrogen,Nitrate+Nitrite as N 2.63 mg/L 0.10 105 90 110
Sample 10:C10030674-o05BMS Sample Matrix Spike Run:TECHNICON_100323A 03/23/10 12:39
Nitrogen,Nitrate+Nitrite as N 2.19 mglL 0.10 107 90 110
Sample 10:C10030674-o05BMSO Sample Matrix Spike Duplicate Run:TECHNICON_100323A 03/23/10 12:41
Nitrogen,Nitrate+Nitrite as N 2.22 mglL 0.10 109 90 110 1.4 10
Sample 10:C10030674-o15BMS Sample Matrix Spike Run:TECHNICON_100323A 03123/10 13:16
Nitrogen,Nitrate+Nitrite as N 3.03 mg/L 0.10 108 90 110
Sample 10:C10030674-o15BMSO Sample Matrix Spike Duplicate Run:TECHNICON_100323A 03/23/10 13:19
Nitrogen,Nitrate+Nitrite as N 3.04 mglL 0.10 108 90 110 0.3 10
Sample 10:C10030544-002GMS Sample Matrix Spike Run:TECHNICON_100323A 03/23/10 13:56
Nitrogen,Nitrate+Nitrite as N 2.20 mg/L 0.10 110 90 110
Sample 10:C10030544-002GMSO Sample Matrix Spike Duplicate Run:TECHNICON_100323A 03/23/1013:59
Nitrogen,Nitrate+Nitrite as N 2.16 mg/L 0.10 108 90 110 1.8 10
Qualifiers:
RL -Analyte reporting limit.NO -Not detected at the reporting limit.
liZiiilU
LABORATORlE-S
compa~me:,
cl )p 1\11 Stll\l
Chain of Custody and Analytical Request Record,,-
PLEASE PRINT (Provide as much information as possible.)
Project ~me;lWS,Permit,Etc.ISample Origin
1$/(~.AlUJ~'J\l ;.J.r"",L.State:(A"
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j::'R for charges and
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(Name,Location,Interval,etc.)Date Time ~
Special ReporUFormats:
8 TIN'~.,it 1L [~:11·JO I'JIJ,?""I (Ix 1)(
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Record Relinquish by (print):ate Ime:I Received by (print):
MUST bel--------------.v-----L--Signed Samole Disoosal:Return to Client:•,'-vv••vv v,--_.__.,.
In certain circumstances,samples submitted to Energy Laboratories,Inc.may be subcontracted to other certified laboratories in order to complete the analysis requested.
This serves as notice of this possibility.All sub,contract data will be clearly notated on your analytical report.
Visit our web site at www.energylab.com for additional information,downloadable fee schedule,forms,and links.
Chain of Custody and Analytical Request Record
PLEASE PRINT (Provide as much information as possible.)
Project Name,PWS,Permit,E:c.I Sample Origin
J-;;r(J'nL'llL AJ/lrak State:IA T
InvoicEi Contact &Phone:
page2of~
Q'uot~/Bottle Order:
EPA/State Compliance:•
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Email:
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SAMPLE IDENTIFICATION
(Name,Location,Interval,etc.)
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Record Received by (print):DatelTime:Signature:
Ml:'ST bef-------------------...L------------1,..",ece=O:::ve::l"'l!:~y~a=r~a~ry~:---~a~e~lm~e:--------~f\~aa~t~u~r~:-_.....-_-_~--",,-_"""
Signed Sample Disposal:Return to Client:Lab Disposal:~.\0\·\0 ~~()~1I\W\
In certain circumstances,samples submitted to Energy Laboratories,Inc.may be subcontracted to other certified laboratories in order to complete the analysis requested.
This serves as notice of this possibility.All sub-contract data will be clearly notated on your analytical report.
Visit our web site at www.energylab.com for additional information,downloadable fee schedule,forms,and links.
page~of~Chain of Custody and Analytical Request Recordli/BilB
LABORATORIES ..--..........-,.-----....---_........_......__.._....----------companYDl proiecj~elj:::m~Et~J;t/k~Sample Origin EPA/State Compliance:.
,~Ni,>()N rrl,~~State:lAl Yes)?No 0
Report M~Address:KtJ7 Contact Name:Phone/Fax:Email:S~:~£I~.().I2AN iJklL ~"ff ?-?2-1'J"-1~II1'r"J/'~brl ff'lSII
Invoice Ad"dress:I Invoice Contact &Phone:Purchase Order:Quote/Bottle Order:
c~~
Special Report/Formats:&~&11W®O@ ~~®(ill~®'TI'~[Q)..Contact ELI prior to :;nlppea.DY:
s:RUSH sample submittal ~\CCCClQ;for charges and Cooler10(5):~o If)-c ~R~co:201 Q;0 scheduling -See ~._>(5 >oro w I-Instruction PageDowDEOO/EOT(Electronic Data)J!l en en<1ls:~e Cil If)I0s:=~Cl "0 ReceiptTempDPOTWNVWTP()c:Comments:Format:u<c~I.Q~::J U :3'0 .....COl e «°°cDState:D LEVEL IV ..••Q)c'-I--co'-~<O.Q 0 I--c:
(!)NDOther:D NELAC ~~Iro '..On Ice:«::J
::J Q).:Q)s:~l-SZ0..<C1l!rCl w "0 Custody SealIj''i ..E >1 W co On Bollie Y N<1l (j)"0 On Cooler ~Nen-~c:CO
(!)NenHIntact
SAMPLE IDENTIFICATION Collection Collection MATRIX I~,~Signature G:)N(Name,Location,Interval,etc.)Date Time Match
1
7!AJN -/J 3-f1-/0 /I.fst{2.,IAJ X X I~
2 77NAJ -I K 3·(-=l--/()/632 :l-W )(X I~~C'"1('\~\Io14
3u.WL..P ir~·18·IO 1J4b()2..-vJ XX 1\9
Innn
4 W)I~
5 1'=~
6 ~
7 ~
8 ~0
9 ac;I~
10 I.J
Custody Relinquished by (print):DatelTime:Signature:Received by (print):DatelTime:Signature:
Record Relinquished by (print):DatelTime:Signature:Received by (print):Date/Time:Signature:
MUST be
Signed Kece,vea DyLaDOratory:3ate/J.lm~\q~o ~ltD JV<\OU)Sample Disposal:Return to Client:Lab Disposal:-\0\'0
In certain circumstances,samples submitted to Energy Laboratories,Inc.may be subcontracted to other certified laboratories in order to complete the analysis requested.
This serves as notice ofthis possibility.All sub-contract data will be clearly notated on your analytical report.
Visit our web site at www.energylab.com for additional information,downloadable fee schedule,forms,and links.
Energy Laboratories Inc
Workorder Receipt Checklist
Denison Mines USA Corp
Login completed by:Halley Ackerman
Reviewed by:
Reviewed Date:
IIIIIIIIIII~1111111~IIIIII~III
C10030674
Date Received:3/19/2010
Received by:ha
Carrier name:FedEx
Shipping container/cooler in good condition?
Custody seals intact on shipping container/cooler?
Custody seals intact on sample bottles?
Chain ofcustody present?
Chain ofcustody signed when relinquished and received?
Chain ofcustody agrees with sample labels?
Samples in proper container/bottle?
Sample containers intact?
Sufficient sample volume for indicated test?
All samples received within holding time?
ContainerlTempBlank temperature:
Water -VOA vials have zero headspace?
Water -pH acceptable upon receipt?
Contact and Corrective Action Comments:
None
Yes 0'
Yes 0'
Yes 0
Yes 0'
Yes 0'
Yes 0'
Yes 0'
Yes 0'
Yes 0'
Yes 0'
3°C On Ice
Yes 0
Yes 0'
No 0
No 0
No 0
No 0
No 0
No 0
No 0
No 0
No 0
No 0
No 0
No 0
Not Present 0
Not Present 0
Not Present 0'
No VOAvials submitted 0'
NotApplicable 0
..
ENERGYLABORATORIES.INC.'2393 Sah CreekHighway (82601)'P.O.Box3258 •Casper,WY82602
TOIlFree 888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com
---------
CLIENT:Denison Mines USA Corp
Project:1st Quarter Nitrate
Sample Delivery Group:C10030674
ORIGINAL SAMPLE SUBMITIAL(S)
All original sample submittals have been returned with the data package.
Report Date:03/29/10
CASE NARRATIVE
SAMPLE TEMPERATURE COMPLIANCE:4°C (±2°C)
Temperature ofsamples received may not be considered properly preserved by accepted standards.Samples that are
hand delivered immediately after collection shall be considered acceptable ifthere is evidence that the chilling process has
begun.
GROSS ALPHA ANALYSIS
Method 900.0 for gross alpha and gross beta is intended as a drinking water method for low TDS waters.Data provided by
this method for non potable waters should be viewed as inconsistent.
RADON IN AIR ANALYSIS
The desired exposure time is 48 hours (2 days).The time delay in returning the canister to the laboratory for processing
should be as short as possible to avoid excessive decay.Maximum recommended delay between end ofexposure to
beginning of counting should not exceed 8 days.
SOIUSOLlD SAMPLES
All samples reported on an as received basis unless otherwise indicated.
ATRAZINE,SIMAZINE AND PCB ANALYSIS
Data for PCBs,Atrazine and Simazine are reported from EPA 525.2.PCB data reported by ELI reflects the results for seven
individual Aroclors.When the results for all seven are NO (not detected),the sample meets EPA compliance criteria for
PCB monitoring.
SUBCONTRACTING ANALYSIS
Subcontracting of sample analyses to an outside laboratory may be required.Ifso,ENERGY LABORATORIES will utilize its
branch laboratories or qualified contract laboratories for this service.Any such laboratories will be indicated within the
Laboratory Analytical Report.
BRANCH LABORATORY LOCATIONS
eli-I>-Energy Laboratories,Inc.-Billings,MT
eli-g -Energy Laboratories,Inc.-Gillette,WY
eli-h -Energy Laboratories,Inc.-Helena,MT
eli-r -Energy Laboratories,Inc.-Rapid City,SO
eli-t -Energy Laboratories,Inc.-College Station,TX
CERTIFICATIONS:
USEPA:WY00002,Radiochemical WY00937;FL-DOH NELAC:E87641,Radiochemical E871 017;California:02118CA;
Oregon:WY200001;Utah:3072350515;Virginia:00057;Washington:C1903
ISO 17025 DISCLAIMER:
The results ofthis Analytical Report relate only to the items submitted for analysis.
ENERGY LABORATORIES,INC.-CASPER,WY certifies that certain method selections contained in this report meet
requirements as set forth by the above accrediting authorities.Some results requested by the client may not be covered
under these certifications.All analysis data to be submitted for regulatory enforcement should be certified in the sample
state oforigin.Please verify ELI's certification coverage by visiting www.energylab.com
ELI appreciates the opportunity to provide you with this analytical service.For additional information and services visit our
web page www.energylab.com.
THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT
IUiililItetlM6t1ilinii
April05,2010
ENERGYLABORATORIES,INC.•2393San CreekHighway (82601)'PO.Box3258 •Casper,WY82602
To//Free 888.235.0515 •307.235.0515 •Fax [phone] •casper@energy/ab.com·www.energy/ab.com
ANALYTICAL SUMMARY REPORT
Denison Mines USA Corp
6425 S Hwy 191
Blanding,UT 84511
Workorder No.:C10030840
Project Name:1st Quarter Nitrate
Energy Laboratories,Inc.received the following 21 samples for Denison Mines USA Corp on 3/26/2010 for analysis.
Sample ID Client Sample ID Collect Date Receive Date Matrix Test
C10030840-001 TWN-6R 03123/1008:17 03/26/10 Aqueous Chloride
Nitrogen, Nitrate +Nitrite-
C1003084D-002 TWN-10R 03/23/10 09:09 03/26/10 Aqueous Same As Above
C10030840-003 TWN-14R 03123/10 10:03 03/26/10 Aqueous Same As Above
C1003084D-004 TWN-17R 03123/1010:5703/26110 Aqueous Same As Above
C10030840-005 TWN-19R 03123/10 13:25 03/26/10 Aqueous Same As Above
C1003084D-006 TWN-9R 03123/1014:4803/26110 Aqueous Same As Above
C1003084D-007 TWN-2R 03/24/1007:53 03/26110 Aqueous Same As Above
C1003084D-008 TWN-3R 03/24/1008:51 03/26/10 Aqueous Same As Above
C10030840-OO9 Piezometer 3 03124/10 13:34 03/26/10 Aqueous Same As Above
C10030840-010 TWN-65 03/23/10 14:13 03/26/10 Aqueous Same As Above
C10030840-011 TWN-6 03123/1008:4303/26/10 Aqueous Same As Above
C10030840-012 TWN-10 03/23/1009:2903/26/10 Aqueous Same As Above
C10030840-013 TWN-14 03/24/10 10:50 03/26/10 Aqueous Same As Above
C10030840-014 TWN-17 03/24/10 11:05 03/26/10 Aqueous Same As Above
C10030840-015 TWN-19 03/23/10 14:13 03/26/10 Aqueous Same As Above
C10030840-016 TWN-9 03/23/1015:07 03/26/10 Aqueous Same As Above
C1OO30840-017 TWN-2 03/24/1008:17 03/26/10 Aqueous Same As Above
C10030840-018 TWN-3 03/25/1009:1503/26/10 Aqueous Same As Above
C1OO30840-019 TWN-70 03/24/1010:50 03/26/10 Aqueous Same As Above
C1003084D-020 TWN-60 03/25/10 09:15 03/26/10 Aqueous Same As Above
C1003084D-021 Temp Blank 03/25/10 00:00 03/26/10 Aqueous Temperature
Any exceptions or problems with the analyses are noted in the Laboratory Analytical Report,the QAlQC Summary
Report,or the Case Narrative.
The results as reported relate only to the item(s) submitted for testing.
Ifyou have any questions regarding these test results,please call.
Report Approved By:~~MW D.wJAJD
Stepanie D.Waldrop l
Reporting Supervisor
ENERGYLABORATORIES.INC••2393 Salt CreekHighway (82601)°P.O Box3258 °Casper,WY 82602
/IlIfI1_To_11_A_re_e_B._'B._'8._2._'35._._05_'_5_O_3_V_7._.2._'3:_'5._05_'_5_'_Fax_3_V_7._,2._'34_._'63._'9_o_ca_spe_r_@_8_ne_fl_Y}'l_i8_b_.CO_'!n_o_www.__.8_n_efi_y._ryl._'8b_,_CO_'!n _
CLIENT:Denison Mines USA Corp
Project:1st Quarter Nitrate
Sample Delivery Group:C10030840
ORIGINAL SAMPLE SUBMITTAL(S)
All original sample submittals have been returned with the data package,
Report Date:04/05/10
CASE NARRATIVE
SAMPLE TEMPERATURE COMPLIANCE:4°C (±2°C)
Temperature of samples received may not be considered properly preserved by accepted standards.Samples that are
hand delivered immediately after collection shall be considered acceptable ifthere is evidence that the chilling process has
begun.
GROSS ALPHA ANALYSIS
Method 900.0 for gross alpha and gross beta is intended as a drinking water method for low TDS waters.Data provided by
this method for non potable waters should be viewed as inconsistent.
RADON IN AIR ANALYSIS
The desired exposure time is 48 hours (2 days).The time delay in returning the canister to the laboratory for processing
should be as short as possible to avoid excessive decay,Maximum recommended delay between end of exposure to
beginning of counting should not exceed 8 days.
SOIUSOLlD SAMPLES
All samples reported on an as received basis unless otherwise indicated.
ATRAZINE,SIMAZINE AND PCB ANALYSIS
Data for PCBs,Atrazine and Simazine are reported from EPA 525.2,PCB data reported by ELI reflects the results for seven
individual Aroclors.When the results for all seven are ND (not detected),the sample meets EPA compliance criteria for
PCB monitoring.
SUBCONTRACTING ANALYSIS
Subcontracting of sample analyses to an outside laboratory may be required.If so,ENERGY LABORATORIES will utilize its
branch laboratories or qualified contract laboratories for this service.Any such laboratories will be indicated within the
Laboratory Analytical Report.
BRANCH LABORATORY LOCATIONS
eli-b -Energy Laboratories,Inc.-Billings,MT
eli-g -Energy Laboratories,Inc.-Gillette,WY
eli-h -Energy Laboratories,Inc.-Helena,MT
eli-r -Energy Laboratories,Inc.-Rapid City,SD
eli-t -Energy Laboratories,Inc.-College Station,TX
CERTIFICATIONS:
USEPA:WY00002,Radiochemical WY00937;FL-DOH NELAC:E87641,Radiochemical E871017;California:02118CA;
Oregon:WY200001;Utah:3072350515;Virginia:00057;Washington:C1903
ISO 17025 DISCLAIMER:
The results ofthis Analytical Report relate only to the items submitted for analysis.
ENERGY LABORATORIES,INC.-CASPER,WY certifies that certain method selections contained in this report meet
requirements as set forth by the above accrediting authorities.Some results requested by the client may not be covered
under these certifications.All analysis data to be submitted for regulatory enforcement should be certified in the sample
state of origin.Please verify ELI's certification coverage by visiting www.energylab.com
ELI appreciates the opportunity to provide you with this analytical service.For additional information and services visit our
web page www.energylab.com.
ENERGYLABORATORIES,INC••2393 Salt CreekHighway(82601)•P.D.Box3258 •Casper,WY82602
lOllFree 888235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com
LABORATORY ANALYTICAL REPORT
Client:
Site Name:
Denison Mines USA Corp
1st Quarter Nitrate Report Oate:04/0511 0
lab 10:C10030840-001
ClientSample 10:TWN-6R
Matrix:Aqueous
Collection Oate:03/23/1008:17
OateReceived:03/26/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab 10:C10030840-002
Client Sample 10:TWN-10R
Matrix:Aqueous
NO
NO
mglL
mg/L
1
0.1
A4500-e1 B 04/01/1013:271 dvg
E353.2 04/03/10 20:01 1Ijl
Collection Oate:03/23/10 09:09
OateReceived:03/26/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
NO
NO
mg/L
mg/L
1
0.1
A4500-CI B
E353.2
04/01/10 13:271 dvg
04/03/10 20:141 Ijl
Lab 10:C10030840-003
Client Sample 10:TWN-14R
Matrix:Aqueous
Collection Oate:03/23/10 10:03
OateReceived:03/26/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
NO
0.1
mg/L
mg/L
1
0.1
A4500-CI B
E353.2
04/01/1013:281 dvg
04/03/10 20:16 1Ijl
Lab 10:C10030840-004
Client Sample 10:TWN-17R
Matrix:Aqueous
Collection Oate:0312311010:57
OateReceived:03126/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
NO
0.1
mg/L
mg/L
1
0.1
A4500-CI B 04/01/1013:301 dvg
E353.2 04/03/1020:19 fiji
Report
Definitions:
RL -Analyte reporting limit.
QCL -Quality control limit.
MCL -Maximum contaminant level.
NO -Not detected at the reporting limit.
-----------------_._------
ENERGYLABORATORIES.INC.·2393SaU CreekHighway (82601)'Po.Box3258 •Casper,WY82602
TOilFree 888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com
l-ALI()/V170m£5
LASORATORY ANALYTICAL REPORT
Client:
Site Name:
Denison Mines USA Corp
1st Quarter Nitrate Report Date:04/05/10
Lab ID:C10030840-005
Client Sample ID:TWN-19R
Matrix:Aqueous
Collection Date:0312311013:25
DateReceived:03/26/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
NO
0.2
mg/L
mg/l
1
0.1
A4500-CI B
E353.2
04/01/1013:31/dvg
04/03/1020:21/1jl
Lab ID:C10030840-006
Client Sample ID:TWN-9R
Matrix:Aqueous
Collection Date:03/23/1014:48
DateReceived:03/26/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab ID:C1003084D-007
Client Sample ID:TWN-2R
Matrix:Aqueous
NO
0.2
mgIL
mgIL
1
0.1
A45OQ-CI B 04/01/1013:321 dvg
E353.2 04/03/10 20:24 I Ijl
Collection Date:03/24/1007:53
DateReceived:03/26/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
NO
0.1
mg/l
mg/l
1
0.1
A4500-CI B
E353.2
04/01/1013:331 dvg
04/03/1020:31 Iljl
Lab ID:C10030840-008
Client Sample ID:TWN-3R
Matrix:Aqueous
Collection Date:0312411008:51
DateReceived:03126/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
NO
1.7
mg/l
mg/l
1
0.1
A450o-CI B
E353.2
04/01110 13:36/dvg
04/03/1020:34/ljl
Report Rl -Analyte reporting limit.
Definitions:QCl -Quality control limit.
MCl •Maximum contaminant level.
NO -Not detected at the reporting limit.
ENERGYLABORATORIES,INC.·2393Salt CreekHighway (82601)·PO Box3258 •Casper,WY82602
1IIIiII_7i._Oh_VFi_fi_'ee_BB._'8._,2._'35._,_05_'_5_._30_7._,2._'35._,_Q_'5_'5_•_Fax_3_'O_7._,2._'3_'4,_'6._'3._'9_._ca_s._~_er_@_le_n_efi_yy._1a_'b_.o_o_m_._www.__,e_'f1_e_r!l_ryh_'8_'b,_Ga_m _
LABORATORY ANALYTICAL REPORT
Client:
Site Name:
Denison Mines USA Corp
1st Quarter Nitrate Report Date:04/05/10
Lab 10:C10030840-009
Client Sample 10:Piezometer 3
Matrix:Aqueous
Collection Date:03/2411013:34
DateReceived:03126/10
Analyses Result Units Qualifiers Rl
MCU
QCl Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab 10:C10030840-010
Client Sample 10:TWN-65
Matrix:Aqueous
116 mg/L
1.7 mg/L
1
0,1
A4500-CI B 04/01/1013:41/dvg
E353.2 04/03/10 20:36 1Ijl
Collection Date:03123/1014:13
DateReceived:03126/10
Analyses Result Units Qualifiers Rl
MCU
QCl Method Analysis Date 1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
113
7.4
mg/L
mg/L
1
0.2
A4500-CI B
E353,2
04/01/10 13:52 1dvg
04/03/10 20:39 Iljl
Lab 10:C10030840-011
ClientSample 10:TWN-6
Matrix:Aqueous
Collection Date:03123/1008:43
DateReceived:03126/10
Analyses Result Units Qualifiers Rl
MCU
QCl Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
19
1,5
mg/L
mg/L
1
0.1
A4500-CI B
E353.2
04/01/1014:021 dvg
04/03/1020:41/1jl
LablD:C10030840-012
ClientSample 10:TWN-10
Matrix:Aqueous
Collection Date:03/23/10 09:29
DateReceived:03/26/10
Analyses Result Units Qualifiers Rl
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
54
1.5
mg/L
mg/L
1
0.1
A4500-CI B
E353.2
04/01/1014:051 dvg
04/03/1020:51 Iljl
Report RL -Analyte reporting limit.
Definitions:QCL -Quality control limit.
MCL -Maximum contaminant level,
NO -Not detected at the reporting limit.
ENERGYLABORATORIES,INC••2393Salt CreekHighway (82601)'P.O Box3258 •Casper,WY82602JgU({~Y 7011Free 888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com
L/lUnfUllORf£5
LABORATORY ANALYTICAL REPORT
Client:
Site Name:
Denison Mines USA Corp
1st Quarter Nitrate Report Date:04/05/10
Lab 10:C10030840-013
Client Sample 10:TWN-14
Matrix:Aqueous
Collection Date:03124/1010:50
DateReceived:03126/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab 10:C10030840-014
Client Sample 10:TWN-17
Matrix:Aqueous
24
2.9
mg/l
mg/l
1
0.1
A4500-CI B 04/01/1014:081 dvg
E353.2 04/03/1020:54/ljl
Collection Date:03/24/10 11 :05
DateReceived:03/26/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen.Nitrate+Nitrite as N
78
10.4
mg/l
mg/l
1
0.2
A4500-CI B
E353.2
04/0111014:10 I dvg
04/03/10 20:56 Iljl
Lab 10:C10030840-015
Client Sample 10:TWN-19
Matrix:Aqueous
Collection Date:03123/1014:13
DateReceived:03126110
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab ID:C10030840-016
ClientSample 10:TWN-9
Matrix:Aqueous
118 mg/l
7.2 mg/l
1
0.2
A4500-CI B 04/01/1014:161 dvg
E353.2 04/03/10 20:59 I Ijl
Collection Date:03/2311 0 15:07
DateReceived:03/26110
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
183
7.6
mg/l
mg/l
1
0.2
A4500-CI B
E353.2
04/01/1014:191dvg
04/03/10 21 :01 Iljl
Report Rl -Analyle reporting limit.
Definitions:QCl -Quality controllimil.
MCl -Maximum contaminant level.
ND -Not detected at the reporting limit.
ENERGYLABORATORIES,INC.·2393SaHCreek Highway(82601)•PO.Box3258 •Casper,WY82602
Toll Free 888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.comIIIlIfl(------------------------------------
LASORATORY ANALYTICAL REPORT
Client:
Site Name:
Denison Mines USA Corp
1st Quarter Nitrate Report Date:04/05/10
LablD:C10030840-017
Client Sample ID:TWN-2
Matrix:Aqueous
Collection Date:03/24/1008:17
DateReceived:03/26/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
85
62.1
mg/L
mg/L D
1
0.8
A4500-CI B
E353.2
04/01/10 14:21 1dvg
04/03/1021 :11/1jl
Lab ID:C10030840-018
ClientSample ID:TWN-3
Matrix:Aqueous
Collection Date:03/25/1009:15
DateReceived:03/26/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date1By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab ID:C10030840-019
Client Sample ID:TWN-70
Matrix:Aqueous
111 mg/L
25.3 mg/L D
1
0.3
A4500-CI B 04/01/1014:241 dvg
E353.2 04/03/1021 :14/1jl
Collection Date:03/24/10 10:50
DateReceived:03/26/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
Lab ID:C10030840-020
Client Sample ID:TWN-60
Matrix:Aqueous
24
3.3
mg/L
mg/L
1
0.2
A4500-CI B 04/01/10 14:291 dvg
E353.2 04/03/1021 :16/1jl
Collection Date:03/25/1009:15
DateReceived:03/26/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date I By
MAJOR IONS
Chloride
Nitrogen,Nitrate+Nitrite as N
NO
0.1
mg/L
mg/L
1
0.1
A4500-CI B 04/0111014:331 dvg
E353.2 04/03/1021 :19/1jl
Report RL -Analyte reporting limit.
Definitions:QCL -Quality control limit.
D -RL increased due to sample matrix interference.
MCL -Maximum contaminant level.
ND -Not detected at the reporting limit.
ENERGYLABORATORIES,INC.•2393SaO CreekHighway (82601)'PO.Box3258 •Casper,WY82602
TollFree 888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com
LAIJORATaRlES
LASORATORY ANALYTICAL REPORT
Client:
Site Name:
Denison Mines USA Corp
1st Quarter Nitrate Report Date:04/05/10
Lab 10:C10030840-021
Client Sample 10:Temp Blank
Matrix:Aqueous
Collection Date:03125/10
DateReceived:03/26/10
Analyses Result Units Qualifiers RL
MCU
QCL Method Analysis Date1By
PHYSICAL PROPERTIES
Temperature
Report Rl-Analyte reporting limit.
Definitions:QCl-Quality control limit.
3.0 ·C E170.1
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
03/26/10 09:20 1ha
ENERGYLABORATORIES.INC••2393Salt Creek Highway(82601)'p.o.Box 3258 •Casper,WY82602
Toll Free 888.235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com
I ARORATOR/F,
QA/QC Summary Report
Client:Denison Mines USA Corp
Project:1st Quarter Nitrate
Report Date:04/05/10
Work Order:C10030840
Analyte Count Result Units RL %REC LowLimit High Limit RPO RPOLlmlt Qual
Method:A4500-CI B
Sample 10:MBLK9-100401A
Chloride
Method Blank
NO mg/l
Batch:100401A-Cl-TTR-W
Run:TITRATION_100401A 04/01/1013:27
0.4
Sample 10:C10030840-002AMS
Chloride
Sample 10:C10030840-002AMSO
Chloride
Sample 10:C10030840-012AMS
Chloride
Sample 10:C10030840-012AMSO
Chloride
Sample 10:LCS35-100401A
Chloride
Qualifiers:
Rl -Analyte reporting limit.
Sample Matrix Spike
68.8 mg/l
Sample Matrix Spike Duplicate
71.6 mg/l
Sample Matrix Spike
375 mg/l
Sample Matrix Spike Duplicate
382 mgll
laboratory Control Sample
3510 mg/l
Run:TITRATION_100401A
1.0 97 90 110
Run:TITRATION_100401A
1.0 101 90 110
Run:TITRATION_100401A
1.0 91 90 110
Run:TITRATION_100401A
1.0 93 90 110
Run:TITRATION_100401A
1.0 99 90 110
NO -Not detected at the reporting limit.
4
1.8
04/01/10 13:54
04/01/10 13:55
10
04/01/1014:38
04/01/1014:39
10
04/01/1014:41
ENERGYLABORATORIES,INC••2393SaltCreek Highway(82601)•PO Box3258 •Casper,WY82602
TOil Free 888235.0515 •307.235.0515 •Fax [phone] •[e-mail]·www.energylab.com
LAIJORATORl£5
QA/QC Summary Report
Client:Denison Mines USA Corp Report Date:04/05/10
Project:1st Quarter Nitrate Work Order:C10030840
Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual
Method:E353.2 Batch:R131252
Sample 10:MBLK·1 Method Blank Run:TECHNICON_100403A 04/03/1019:44
Nitrogen,Nitrate+Nitrite as N 0.06 mg/L 0.03
Sample ID:LCS·2 Laboratory Control Sample Run:TECHNICON_100403A 04/03/1019:46
Nitrogen,Nitrate+Nitrite as N 2.50 mg/L 0.10 98 90 110
Sample ID:C10030840-o01BMS Sample Matrix Spike Run:TECHNICON_100403A 04/03/1020:04
Nitrogen,Nitrate+Nitrite as N 2.00 mg/L 0.10 97 90 110
Sample ID:C10030840·001BMSD Sample Matrix Spike Duplicate Run:TECHNICON_100403A 04/03/1020:06
Nitrogen,Nitrate+Nitrite as N 2.00 mg/L 0.10 97 90 110 0 10
Sample ID:C10030820-o01DMS Sample Matrix Spike Run:TECHNICON_100403A 04/03/10 21 :24
Nitrogen,Nitrate+Nitrite as N 2.20 mg/L 0.10 98 90 110
Sample ID:C10030820-o01DMSD Sample Matrix Spike Duplicate Run:TECHNICON_100403A 04/03/1021 :26
Nitrogen,Nitrate+Nitrite as N 2.28 mg/L 0.10 101 90 110 3.6 10
Sample ID:C10030840-o11BMS Sample Matrix Spike Run:TECHNICON_100403A 04/03/1021:34
Nitrogen,Nitrate+Nitrite as N 3.38 mg/L 0.10 93 90 110
Sample ID:C10030840-o11BMSD Sample Matrix Spike Duplicate Run:TECHNICON_100403A 04/03/1021:36
Nitrogen,Nitrate+Nitrite as N 3.46 mg/L 0.10 97 90 110 2.3 10
Qualifiers:
RL •Analyte reporting limit.NO -Not detected at the reporting limit.
Energy Laboratories Inc
Workorder Receipt Checklist
Denison Mines USA Corp
Login completed by:Corinne Wagner
Reviewed by:
Reviewed Date:
IIIIII1 ill~11111111 ~~~~IIII~IIIIII
C10030840
Date Received:3/26/2010
Received by:ha
Carrier name:FedEx
Shipping container/cooler in good condition?
Custody seals intact on shipping container/cooler?
Custody seals intact on sample bottles?
Chain ofcustody present?
Chain ofcustody signed when relinquished and received?
Chain ofcustody agrees with sample labels?
Samples in proper container/bottle?
Sample containers intact?
Sufficient sample volume for indicated test?
All samples received within holding time?
ContainerlTemp Blank temperature:
Water -VOA vials have zero headspace?
Water -pH acceptable upon receipt?
Contactand Corrective Action Comments:
None
Yes 0
Yes 0
Yes 0
Yes 0
Yes 0
Yes 0
Yes 0
Yes 0
Yes 0
Yes 0
3°C On Ice
Yes D
Yes 0
No 0
No 0
No 0
No 0
No 0
No D
No 0
No 0
No 0
No 0
No 0
No 0
Not Present 0
Not Present 0
Not Present 0
No VOA vials submitted 0
Not Applicable 0
page~of4ChainofCustodyandAnalyticalRequestRecordl!/Bilfd
LAGORA TORIES - --
-..-_..--....~...---...__......_.....__._..----_._._.
Company Name:proj7~rp1j:W~~~rm~:~Sample Origin EPA/State Compliance:~6)Alt~MJ t1lIN~~State:JA'I Yes~No D
Report Mail A~O~S:kS~8'~r Contact Niiine:/11 PhoneiFax:Email:Sampler:(Please Print)
P;2t,..J'~fAr ~lfSJI I2~H'L -~6 V-cY ~z 2.1 T2A t\-hlrl/
Invoice Address:(Invoice"Contact &Phone:Purchase Order:Quote/Bottle Order:
$/It(£r ~~""""-
Special ReporVFormats:&Im&[1W@O@ OO~®QD[g@'U'~[Q)..Contact ELI prior to l>hippea by:.
~~L\~"lClQ>RUSH sample submittal
~O(/)..r:::.i='for charges and Cooler lo(s):
2!co;g 01 Q>0 ~R scheduling -See CU<LV\~.->0 >orooDWDEDD/EDT(Electronic Data).lBenenro~W Instruction Pagec:Ul (/)J:o~=~0)"0 Receipt TempoPOTWIWWTPFormat:U c:Comments:u«~I.Q~::J U '3'0 .....COI c:«0 °CoState:D LEVEL IV "-"-Qj2 §'I::I-rooOther:D NELAC ~o.rol"",Cl ~c:<V"-On Ice:~ro I ::J
::J Q).="Q)~l-Szo..«I~Cl ~~W "E Custody Seal!ij >1 W ro On Bottle Y N~C/)"0 ~:en ,I::On Cooler
I~85 H Intact
SAMPLE IDENTIFICATION Collection Collection MATRIX I~Signature ~N(Name,Location,Interval,etc.)Date Time Match
f-WAI -til..1:3-23-'6 ~lflf 2-w X)<~
7NN,./1JIL l3·Z3·/D dill?2-vJ y X ~
37IAJN-14r1-r5-/3-10 L4A~~!l-f/J X X Q)I••IIU nnn
47wlJ _17-P....l~·23-ID J~5?.2-1;..)X Ix m
5..,lA1J -Jqrl l~:1..~·'O r~2,t;':;l..-f,.J )(-=)(~
6-rz,..JjJ -qfL l~-/3'IO jlf'IK',2-w y X ~Iirr)~o ru
7TN}!~2rt 13·24./-,/J 1J163 ~-V\I )(X ~
8-tJt/A/-.31l..L1·2 &(-10 dJr6"1 :l.-w )(X ~0
9 .~.~'L .......-~t?.~l$·2lf·IO I/~<'L/f)-/;V X )(ro-aI~
~"rJVAI"'~1J-23'/O Ilfl3 2.~lA)If}(It::::!
Custody Rel~hedby (Pi)}./.Date/Time:<>'gno ,.re:a~Received by (print):DatelTime:Signature:
14...1 --_'!'25-JtJ 1'101)~~MR~~~r:e Relinquist1e~by (~nnt):DatelTime:dature:I -
Received by (print):DatelTime:Signature:
r l<eCSlvea Dy LaDorawry:uale/llme:c.rzo :;~}(O MCuISignedSampleDisposal:Return to Client:Lab Disposal:~-?-b·\(..)
In certain circumstances,samples submitted to Energy Laboratories,Inc.may be subcontracted to other certified laboratories in order to complete the analysis requested.
This serves as notice of this possibility.All sub-contract data will be clearly notated on your analytical report.
Visit our web site at www.energylab.com for additional information,downloadable fee schedule,forms,and links.
page.2-of-2-Chain of Custody and Analytical Request RecordJiliilg
LAGORATORILS .---------..-----..---------.---_.._-
Co~y Name:Project Nam~wS,Permit,Etc.Sample Origin EPA/State Compliance:
_I )eAl/~otV m;A!€'S I ~r U~eTtL State:LA.'1 Yes ~No 0
Rep~r~/A~1 IP{Slf Corz:m"p~..v p;;;722/Email T2:.(~")
Invoice Address:I Invoice Contact &Phone:Purchase Order:Quofe/Bottle Order:
.-'-•_<;".L~
Special ReporUFormats:3:~&[1W@O@ W~®QD~@'i]'~[Q)..Contact ELI prior to .~edPY:r".,o ....RUSH sample submittal .\-lC"A L X
~0 U)~.-..for charges and CoolerlOIs):.~ro~~$0 ~R scheduling-See n{ar-.nY-
O 0 j9>C/)t1l ~w t:-Instruction Page ~'-{DW EDD/EDT(Electronic Data)§~:£!~:>I '0 R I T
O :>'0 t1l 0>I''\C C t ece pt empPOTWIWWTPFormat:~~~I~I~~e u ommen 5:3 0oState:0 LEVEL IV ....~"*§;5 .-~CoOther:0 NELAC ~~I~.~5 On Ice:6JN
::::l (1).-(I)3:I-5za.~I 5fO _W 'E Custody Seal
~>1 ,~W t1l On Bottle Y N
C/)....;I ~C/)-g On Cooler &N~t1l1--------------.-----,..-----+------1 .."'1 I"""':en H Intact N
SAMPLE IDENTIFICATION Collection Collection MATRIX :...l ~Signature A,.
(Name,Location,Interval,etc.)Date Time ~\.Match ~N
1/INfJ ~ft;Ic~·23-/0 IfJxC/3 ~-r"J )<)(.~
2-r1N/\///)~·23-/oIM..19 :l-iAJ X X ~
3T!AJAf J'f IJ·2f.{·/O I~SO ~-fA))()c ~
4 T1AJ)J 17-3-.:24·/0 /l1J.<'a~w K 'X ~
5 INAI"....11 1~'7-3-{D I'-II~~'W)(X ~
6/INAI _q 13·23-(0 16fJ7-~-fA)x.X ~
7-'NN_1.13,21./·10 ng/1 :),IAJ X X '~l~tl)<.rflID
8 '11tJAI-~-S ~S·2t(.ltJ 11J9/r d,fA)X Y ~
9 -nJW -7-{)13 ·2l{-(0 fAr-1J 2 -fA)~)c ~
10 TW/V"~/O :5~o'l()11191t"a·W )(X c:JlCustodyRel~edby (print)/)l DatelTime:I~'O -:--:>Sign~:/:Received by (print):DatelTime:Signature:.,./.'...VA _A~-zr:J6 I~/~y:~~r~e Relinquis~ed by (prinr):DatelTime:I Spature:-Received by (print):DatelTime:Signature:
•",eC8'veo oy LaOOratory:.!:!.ale~,me:\ \::S'~~I~e:of1SignedSampleDisposal:Return to Client:Lab Disposal:'3"'1i.,-.In crl..O ~A"~J~
In certain circumstances,samples submitted to Energy Laboratories,Inc.may be subcontracted to other certified laboratories in order to complete the analysis requested.
This serves as notice of this possibility.All sub-contract data will be clearly notated on your analytical report.
Visit our web site at www.energvlab.com for additional information,downloadable fee schedule,forms,and links.

Tab H
Quality Assurance and Data Validation Tables

Table H-1: Field Data QA/QC Evaluation
Location 2x Casing Volume
Volume
Pumped
(gallons)
Volume
Check RPD RPD RPD RPD RPD
Piezometer 3 -- -- -- 2583 -- -- 11.7 -- -- 13.2 -- -- 242 -- -- 34.2 -- --
TWN-1 84.46 90.00 OK 737.2 738.1 -0.12 7.01 7.01 0.00 14.74 14.75 -0.07 509 509 0.00 39.1 30.1 26.01
TWN-2 106.99 110.00 OK 2961 2961 0.00 6.38 6.36 0.31 13 13.07 -0.54 530 530 0.00 93 121 -26.17
TWN-3 84.15 70.00 Insufficient 2607 2610 -0.12 6.66 6.62 0.60 14.5 14.38 0.83 493 493 0.00 382 146.8 88.96
TWN-4 115.86 120.00 OK 972.1 973.5 -0.14 6.71 6.7 0.15 14.43 14.43 0.00 478 479 -0.21 31.2 31.6 -1.27
TWN-5 103.75 110.00 OK 3075 3075 0.00 6.3 6.32 -0.32 14.63 14.62 0.07 473 471 0.42 11.6 9.2 23.08
TWN-6 72.31 80.00 OK 1480 1482 -0.14 6.65 6.64 0.15 14.34 14.35 -0.07 451 452 -0.22 37.3 38.1 -2.12
TWN-7 19.76 12.00 Insufficient 1166 1159 0.60 6.91 6.86 0.73 15.56 15.3 1.69 443 439 0.91 19.7 28.3 -35.83
TWN-8 108.67 108.60 OK 2370 2375 -0.21 7.01 6.99 0.29 14.45 14.45 0.00 181 188 -3.79 16 14.3 11.22
TWN-9 42.21 50.00 OK 2459 2576 -4.65 6.52 6.45 1.08 14.81 14.74 0.47 435 439 -0.92 46.8 47.1 -0.64
TWN-10 30.40 40.00 OK 3836 3883 -1.22 4.1 4.12 -0.49 14.48 14.5 -0.14 536 534 0.37 55.5 77.5 -33.08
TWN-11 93.88 100.00 OK 2750 2752 -0.07 6.46 6.45 0.15 14.6 14.6 0.00 445 443 0.45 173.1 150.6 13.90
TWN-12 93.80 100.00 OK 2512 2522 -0.40 6.66 6.67 -0.15 14.45 14.45 0.00 362 351 3.09 401 419 -4.39
TWN-13 95.14 100.00 OK 1244 1237 0.56 7.42 7.42 0.00 14.91 14.89 0.13 364 358 1.66 50.3 432 -158.28
TWN-14 94.08 50.00 Insufficient 1129 -- -- 7.32 -- -- 14.94 -- -- 469 -- -- 269.2 -- --
TWN-15 81.42 20.00 Insufficient -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
TWN-16 66.58 70.00 OK 1834 1828 0.33 6.62 6.62 0.00 15 15.02 -0.13 443 443 0.00 46.4 7.1 146.92
TWN-17 97.70 100.00 OK 3 520.4 -197.71 6.94 7.03 -1.29 14.57 14.83 -1.77 478 469 1.90 176.1 90.9 63.82
TWN-18 113.15 120.00 OK 2139 2144 -0.23 6.58 6.56 0.30 14.31 14.3 0.07 412 412 0.00 26.5 27.3 -2.97
TWN-19 73.29 80.00 OK 1058 1061 -0.28 6.91 6.9 0.14 14.81 14.8 0.07 441 442 -0.23 70.9 68.3 3.74
UWLP -- -- -- 134.1 133.5 0.45 7.73 7.75 -0.26 6.38 6.39 -0.16 459 457 0.44 1.4 1.5 -6.90
Piezometer 3 was not pumped, only one set of parameters was taken.
TWN-3, TWN-7, TWN-14, and TWN-15 were pumped dry. Only one set of parameters was able to be taken from TWN-14 and TWN-15
UWLP is a pond grab sample, no pumping was required.
Conductivity pH Temp (oC) Redox Potential Turbidity NTU)
Table H-2: Holding Time Evaluation
All samples in the first quarter 2010 Nitrate sampling event were analyzed within their accepted holding
times for every analyte.
Well
Nitrate/Nitrite as
Nitrogen Chloride
Piezometer 3 X X
TWN-1 X X
TWN-1R X X
TWN-2 X X
TWN-2R X X
TWN-3 X X
TWN-3R X X
TWN-4 X X
TWN-4R X X
TWN-5 X X
TWN-5R X X
TWN-6 X X
TWN-6R X X
TWN-7 X X
TWN-7R X X
TWN-8 X X
TWN-8R X X
TWN-9 X X
TWN-9R X X
TWN-10 X X
TWN-10R X X
TWN-11 X X
TWN-11R X X
TWN-12 X X
TWN-12R X X
TWN-13 X X
TWN-13R X X
TWN-14 X X
TWN-14R X X
TWN-15 X X
TWN-15R X X
TWN-16 X X
TWN-16R X X
TWN-17 X X
TWN-17R X X
TWN-18 X X
TWN-18R X X
TWN-19 X X
TWN-19R X X
TWN-60 X X
TWN-65 X X
TWN-70 X X
UWLP X X
X= Holding time was verified against method and QAP requirements and was found to be in compliance.
Table H-3: Receipt Temperature Evaluation
Sample Batch Wells in Batch Temperature
C10030674
TWN-1, TWN-1R, TWN-4, TWN-4R, TWN-5, TWN-5R,
TWN-7, TWN-7R, TWN-8, TWN-8R, TWN-11, TWN-11R,
TWN-12, TWN-12R, TWN-13, TWN-13R, TWN-15, TWN-
15R, TWN-16, TWN-16R, TWN-18, and TWN-18R
3 ˚C
C10030840 Piezometer 3, TWN-2, TWN-2R, TWN-3, TWN-3R, TWN-
6, TWN-6R, TWN-9, TWN-9R, TWN-10, TWN-10R, TWN-
14, TWN-14R, TWN-17, TWN-17R TWN-19, and TWN-
19R
3 ˚C
Table H-4: Analytical Method Check
Parameter Method Method Used by Lab
Nitrate E353.2 E353.2
Chloride A4500-Cl B A4500-Cl B
Table H-5: Reporting Limit Evaluation
Well Analyte
TWN-9 Nitrate 0.2 mg/L 0.1 mg/L
TWN-17 Nitrate 0.2 mg/L 0.1 mg/L
TWN-19 Nitrate 0.2 mg/L 0.1 mg/L
TWN-65 (Duplicate of TWN-19) Nitrate 0.2 mg/L 0.1 mg/L
TWN-70 (Duplicate of TWN-14) Nitrate 0.2 mg/L 0.1 mg/L
The above reporting limits were acceptable because they resulted from dilution of the
sample due to elevated concentrations and/or or matrix interference and in all cases the
analytical result was greater than the reporting limit used.
Reporting Limit
Used
Approved Reporting
Limit With Qualifier
Table H-6: QA/QC Evaluation for Sample Duplicates
Constituent TWN-19 TWN-65 %RPD
Chloride 118 113 4.33
Nitrate 7.2 7.4 -2.74
TWN-14 TWN-70 %RPD
24 24 0.00
Nitrate 2.9 3.3 -12.90
H-7: Rinsate Check
Rinsate Sample Parameter Qualifier Well Sampled Qualifier
Reporting
Limit
TWN-2R Nitrate and Nitrite 0.1 mg/L TWN-2 62.1 mg/L D 0.1 mg/L
TWN-3R Nitrate and Nitrite 1.7 mg/L TWN-3 25.3 mg/L D 0.1 mg/L
TWN-4R Nitrate and Nitrite 0.2 mg/L TWN-4 0.9 mg/L 0.1 mg/L
TWN-9R Nitrate and Nitrite 0.2 mg/L TWN-9 7.6 mg/L 0.1 mg/L
TWN-12R Nitrate and Nitrite 0.1 mg/L TWN-12 0.7 mg/L 0.1 mg/L
TWN-14R Nitrate and Nitrite 0.1 mg/L TWN-14 2.9 mg/L 0.1 mg/L
TWN-17R Nitrate and Nitrite 0.1 mg/L TWN-17 10.4 mg/L 0.1 mg/L
TWN-19R Nitrate and Nitrite 0.2 mg/L TWN-19 7.2 mg/L 0.1 mg/L
Rinsate Result Result
Table H-8: QC Control Limits for Analysis and Blanks
The percent recovery was within the limits for all method blanks, lab control samples,
matrix spikes, and matrix spike duplicates from Energy Labs reports C10030674 and C10030840.

Tab I
Kriged Current Quarter Chloroform Isoconcentration Map

HYDRO
GEO
CHEM, INC.APPROVED DATE REFERENCE FIGURE
3332
3000
SCALE IN FEET
0
NS
NS
NS
NS
0.1
NS
ND
NS
NS
NS
2.8
6.5
2.7
NS
0.1
ND
5.8
0.2
NS
16
22 7.1
6.8
2.8
6.6
6.8
1.6
1.4
5
6.8
4
4.3
4.5
0.2
4.2
ND
5.12
2
8.4
37
NS
NS
1.7
NS
NS
MW-01
MW-02
MW-03
MW-05
MW-11
MW-12
MW-14
MW-15
MW-17
MW-18
MW-19
MW-20
MW-22
MW-23
MW-24
MW-25
MW-27
MW-28
MW-29
MW-30
MW-31

MW-26

MW-32
TW4-19

PIEZ-1
PIEZ-2
PIEZ-3
PIEZ-4
PIEZ-5
3.8
4 NDMW-04
ND
33
14
TWN-1
TWN-2
TWN-3
TWN-4
TWN-5
TWN-6
TWN-7
TWN-8
TWN-9
TWN-10
TWN-11 TWN-12
TWN-13
TWN-14
TWN-15
TWN-16
TWN-17
TWN-18
TWN-19
0.5
62
25
0.9
0.3
1.5
0.8
0.1
7.6
1.5
1.4 0.7
0.1
2.9
0.7
1.2
10
1.6
7.2
MW-4
PIEZ-3
4.0
1.7
perched monitoring well showing
concentration in mg/L
temporary perched monitoring well installed
April, 2005 showing concentration in mg/L
perched piezometer showing
concentration in mg/L
7.1
MW-32
ND
temporary perched monitoring well
showing concentration in mg/L
8.4
perched monitoring well installed April, 2005
showing concentration in mg/L
KRIGED 1st QUARTER, 2010 NITROGEN (mg/L)
(NITRATE + NITRITE AS N)
WHITE MESA SITE
H:/718000/
may10/nitrate/nit0310c.srf
EXPLANATION
NOTES: ND = not detected, NS = not sampled
temporary perched monitoring well installed
May, 2007 showing concentration in mg/LND SJS
temporary perched nitrate
monitoring well showing
concentration in mg/L
0.5
TWN-1
HYDRO
GEO
CHEM, INC.APPROVED DATE REFERENCE FIGURE
3332
3000
SCALE IN FEET
0
NS
NS
NS
NS
33
NS
17
NS
NS
NS
NS
70
61
NS
46
31
37
102
NS
106
128 35
42
23
48
43
45
47
49
42
22
53
33
57
77
38
41144
179
228
427
NS
NS
116
NS
NS
MW-01
MW-02
MW-03
MW-05
MW-11
MW-12
MW-14
MW-15
MW-17
MW-18
MW-19
MW-20
MW-22
MW-23
MW-24
MW-25
MW-27
MW-28
MW-29
MW-30
MW-31

MW-26

MW-32
TW4-19

PIEZ-1
PIEZ-2
PIEZ-3
PIEZ-4
PIEZ-5
36
45 57MW-04
45
896
296
TWN-1
TWN-2
TWN-3
TWN-4
TWN-5
TWN-6
TWN-7
TWN-8
TWN-9
TWN-10
TWN-11 TWN-12
TWN-13
TWN-14
TWN-15
TWN-16
TWN-17
TWN-18
TWN-19
17
85
111
22
43
19
6
11
183
54
73 113
47
24
43
35
78
42
118
MW-4
PIEZ-3
45
116
perched monitoring well showing
concentration in mg/L
temporary perched monitoring well installed
April, 2005 showing concentration in mg/L
perched piezometer showing
concentration in mg/L
35
MW-32
38
temporary perched monitoring well
showing concentration in mg/L
179
perched monitoring well installed April, 2005
showing concentration in mg/L KRIGED 1st QUARTER, 2010 CHLORIDE
WHITE MESA SITE
H:/718000/
may10/chloride/cl0310.srf
EXPLANATION
NOTES: ND = not detected, NS = not sampled
temporary perched monitoring well installed
May, 2007 showing concentration in mg/L45 SJS
temporary perched nitrate
monitoring well showing
concentration in mg/L
17
TWN-1

Tab J
Analyte Concentrations Over Time

TWN‐1
Date Nitrate (mg/l) Chloride (mg/l)
2/6/2009 0.7 19
7/21/2009 0.4 17
9/21/2009 0.4 19
10/28/2009 0.5 18
3/17/2010 0.5 17
TWN‐2
Date Nitrate (mg/l) Chloride (mg/l)
2/6/2009 25.4 29
7/21/2009 25 25
9/21/2009 22.6 17
11/2/2009 20.8 55
3/24/2010 62.1 85
TWN‐3
Date Nitrate (mg/l) Chloride (mg/l)
2/6/2009 23.6 96
7/21/2009 25.3 96
9/21/2009 27.1 99
11/2/2009 29 106
3/25/2010 25.3 111
TWN‐4
Date Nitrate (mg/l) Chloride (mg/l)
2/6/2009 1 13
7/21/2009 0.05 12
9/21/2009 0.4 13
10/28/2009 0.4 11
3/16/2010 0.9 22
TWN‐5
Date Nitrate (mg/l) Chloride (mg/l)
8/25/2009 22 42
9/21/2009 0.5 45
11/10/2009 0.2 48
3/16/2010 0.3 43
TWN‐6
Date Nitrate (mg/l) Chloride (mg/l)
8/25/2009 3.2 32
9/22/2009 1.6 13
11/3/2009 1.4 21
3/23/2010 1.5 19
TWN‐7
Date Nitrate (mg/l) Chloride (mg/l)
8/25/2009 ND 11
9/21/2009 ND 7
11/10/2009 0.1 7
3/17/2010 0.8 6
TWN‐8
Date Nitrate (mg/l) Chloride (mg/l) Notes
8/25/2009 0 11 Nitrate is ND
9/21/2009 0 12 Nitrate is ND
11/10/2009 0 12 Nitrate is ND
3/16/2010 0 11 Nitrate is ND
TWN‐9
Date Nitrate (mg/l) Chloride (mg/l)
8/25/2009 9.3 169
9/22/2009 8.9 201
11/10/2009 12 205
3/23/2010 7.6 183
TWN‐10
Date Nitrate (mg/l) Chloride (mg/l)
8/25/2009 1.1 19
9/22/2009 1.6 35
11/10/2009 1.4 26
3/23/2010 1.5 54
TWN‐11
Date Nitrate (mg/l) Chloride (mg/l)
11/3/2009 1.3 74
3/17/2010 1.4 73
TWN‐12
Date Nitrate (mg/l) Chloride (mg/l)
11/3/2009 0.5 109
3/17/2010 0.7 113
TWN‐13
Date Nitrate (mg/l) Chloride (mg/l) Notes
11/4/2009 0.5 83
3/17/2010 0 47 Nitrate ND
TWN‐14
Date Nitrate (mg/l) Chloride (mg/l)
11/4/2009 3.4 32
3/24/2010 2.9 24
TWN‐15
Date Nitrate (mg/l) Chloride (mg/l)
11/10/2009 1.1 78
3/18/2010 0.7 43
TWN‐16
Date Nitrate (mg/l) Chloride (mg/l)
11/4/2009 1 39
3/17/2010 1.2 35
TWN‐17
Date Nitrate (mg/l) Chloride (mg/l)
11/4/2009 6.7 152
3/24/2010 10.4 78
TWN‐18
Date Nitrate (mg/l) Chloride (mg/l)
11/2/2009 1.3 57
3/17/2010 1.6 42
TWN‐19
Date Nitrate (mg/l) Chloride (mg/l)
11/2/2009 7.4 125
3/23/2010 7.2 118
Piezometer 1
Date Nitrate (mg/l) Chloride (mg/l)
2/19/2009 6.8 NA
7/14/2009 6.8 60
9/22/2009 7.3 78
10/27/2009 7.4 61
Piezometer 2
Date Nitrate (mg/l) Chloride (mg/l)
2/19/2009 0.5 NA
7/14/2009 0.5 7
9/22/2009 0.5 17
10/27/2009 0.6 7
Piezometer 3
Date Nitrate (mg/l) Chloride (mg/l)
2/19/2009 0.7 NA
7/14/2009 0.8 12
9/22/2009 0.8 24
10/27/2009 1.2 19
3/24/2010 1.7 116
Piezometer 4
Date Nitrate (mg/l) Chloride (mg/l)
7/14/2009 1.8 46
Piezometer 5
Date Nitrate (mg/l) Chloride (mg/l)
7/14/2009 0.7 18
MW‐18
Date Nitrate (mg/l) Chloride (mg/l)
7/14/2009 ND 51
MW‐19
Date Nitrate (mg/l) Chloride (mg/l)
7/14/2009 2.2 24
Wildlife Pond
Date Nitrate (mg/l) Chloride (mg/l) Note
9/22/2009 0 5 Nitrate ND
10/27/2009 0 3 Nitrate ND
Frog Pond
Date Nitrate (mg/l) Chloride (mg/l) Notes
10/14/2009 0 NA Nitrate ND

Tab K
Chloroform Concentration Trend Graphs

0.3
0.4
0.5
0.6
0.7
0.8
(m
g
/
L
)
TWN-1 Nitrate Concentrations
0
0.1
0.2
Fe
b
-
0
9
Ma
r
-
0
9
Ap
r
-
0
9
Ma
y
-
0
9
Ju
n
-
0
9
Ju
l
-
0
9
Au
g
-
0
9
Se
p
-
0
9
Oc
t
-
0
9
No
v
-
0
9
De
c
-
0
9
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
17.5
18
18.5
19
19.5
(m
g
/
L
)
TWN-1 Chloride Concentrations
16
16.5
17
Fe
b
-
0
9
Ma
r
-
0
9
Ap
r
-
0
9
Ma
y
-
0
9
Ju
n
-
0
9
Ju
l
-
0
9
Au
g
-
0
9
Se
p
-
0
9
Oc
t
-
0
9
No
v
-
0
9
De
c
-
0
9
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
30
40
50
60
70
(m
g
/
L
)
TWN-2 Nitrate Concentrations
0
10
20
Fe
b
-
0
9
Ma
r
-
0
9
Ap
r
-
0
9
Ma
y
-
0
9
Ju
n
-
0
9
Ju
l
-
0
9
Au
g
-
0
9
Se
p
-
0
9
Oc
t
-
0
9
No
v
-
0
9
De
c
-
0
9
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
40
50
60
70
80
90
(m
g
/
L
)
TWN-2 Chloride Concentrations
0
10
20
30
Fe
b
-
0
9
Ma
r
-
0
9
Ap
r
-
0
9
Ma
y
-
0
9
Ju
n
-
0
9
Ju
l
-
0
9
Au
g
-
0
9
Se
p
-
0
9
Oc
t
-
0
9
No
v
-
0
9
De
c
-
0
9
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
15
20
25
30
35
(m
g
/
L
)
TWN-3 Nitrate Concentrations
0
5
10
Fe
b
-
0
9
Ma
r
-
0
9
Ap
r
-
0
9
Ma
y
-
0
9
Ju
n
-
0
9
Ju
l
-
0
9
Au
g
-
0
9
Se
p
-
0
9
Oc
t
-
0
9
No
v
-
0
9
De
c
-
0
9
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
100
105
110
115
(m
g
/
L
)
TWN-3 Chloride Concentrations
85
90
95
Fe
b
-
0
9
Ma
r
-
0
9
Ap
r
-
0
9
Ma
y
-
0
9
Ju
n
-
0
9
Ju
l
-
0
9
Au
g
-
0
9
Se
p
-
0
9
Oc
t
-
0
9
No
v
-
0
9
De
c
-
0
9
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
0.6
0.8
1
1.2
(m
g
/
L
)
TWN-4 Nitrate Concentrations
0
0.2
0.4
Fe
b
-
0
9
Ma
r
-
0
9
Ap
r
-
0
9
Ma
y
-
0
9
Ju
n
-
0
9
Ju
l
-
0
9
Au
g
-
0
9
Se
p
-
0
9
Oc
t
-
0
9
No
v
-
0
9
De
c
-
0
9
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
10
15
20
25
(m
g
/
L
)
TWN-4 Chloride Concentrations
0
5
Fe
b
-
0
9
Ma
r
-
0
9
Ap
r
-
0
9
Ma
y
-
0
9
Ju
n
-
0
9
Ju
l
-
0
9
Au
g
-
0
9
Se
p
-
0
9
Oc
t
-
0
9
No
v
-
0
9
De
c
-
0
9
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
10
15
20
25
(m
g
/
L
)
TWN-5 Nitrate Concentrations
0
5
8/
2
5
/
2
0
0
9
9/
1
/
2
0
0
9
9/
8
/
2
0
0
9
9/
1
5
/
2
0
0
9
9/
2
2
/
2
0
0
9
9/
2
9
/
2
0
0
9
10
/
6
/
2
0
0
9
10
/
1
3
/
2
0
…
10
/
2
0
/
2
0
…
10
/
2
7
/
2
0
…
11
/
3
/
2
0
0
9
11
/
1
0
/
2
0
…
11
/
1
7
/
2
0
…
11
/
2
4
/
2
0
…
12
/
1
/
2
0
0
9
12
/
8
/
2
0
0
9
12
/
1
5
/
2
0
…
12
/
2
2
/
2
0
…
12
/
2
9
/
2
0
…
1/
5
/
2
0
1
0
1/
1
2
/
2
0
1
0
1/
1
9
/
2
0
1
0
1/
2
6
/
2
0
1
0
2/
2
/
2
0
1
0
2/
9
/
2
0
1
0
2/
1
6
/
2
0
1
0
2/
2
3
/
2
0
1
0
3/
2
/
2
0
1
0
3/
9
/
2
0
1
0
3/
1
6
/
2
0
1
0
43
44
45
46
47
48
49
(m
g
/
L
)
TWN-5 Chloride Concentrations
39
40
41
42
8/
2
5
/
2
0
0
9
9/
1
/
2
0
0
9
9/
8
/
2
0
0
9
9/
1
5
/
2
0
0
9
9/
2
2
/
2
0
0
9
9/
2
9
/
2
0
0
9
10
/
6
/
2
0
0
9
10
/
1
3
/
2
0
…
10
/
2
0
/
2
0
…
10
/
2
7
/
2
0
…
11
/
3
/
2
0
0
9
11
/
1
0
/
2
0
…
11
/
1
7
/
2
0
…
11
/
2
4
/
2
0
…
12
/
1
/
2
0
0
9
12
/
8
/
2
0
0
9
12
/
1
5
/
2
0
…
12
/
2
2
/
2
0
…
12
/
2
9
/
2
0
…
1/
5
/
2
0
1
0
1/
1
2
/
2
0
1
0
1/
1
9
/
2
0
1
0
1/
2
6
/
2
0
1
0
2/
2
/
2
0
1
0
2/
9
/
2
0
1
0
2/
1
6
/
2
0
1
0
2/
2
3
/
2
0
1
0
3/
2
/
2
0
1
0
3/
9
/
2
0
1
0
3/
1
6
/
2
0
1
0
1.5
2
2.5
3
3.5
(m
g
/
L
)
TWN-6 Nitrate Concentrations
0
0.5
1
Au
g
-
09
Se
p
-
09
Oc
t
-
0
9
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
15
20
25
30
35
(m
g
/
L
)
TWN-6 Chloride Concentrations
0
5
10
Au
g
-
09
Se
p
-
09
Oc
t
-
0
9
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
0.4
0.5
0.6
0.7
0.8
0.9
(m
g
/
L
)
TWN-7 Nitrate Concentrations
0
0.1
0.2
0.3
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
4
6
8
10
12
(m
g
/
L
)
TWN-7 Chloride Concentrations
0
2
4
8/
2
5
/
2
0
0
9
9/
1
/
2
0
0
9
9/
8
/
2
0
0
9
9/
1
5
/
2
0
0
9
9/
2
2
/
2
0
0
9
9/
2
9
/
2
0
0
9
10
/
6
/
2
0
0
9
10
/
1
3
/
2
0
…
10
/
2
0
/
2
0
…
10
/
2
7
/
2
0
…
11
/
3
/
2
0
0
9
11
/
1
0
/
2
0
…
11
/
1
7
/
2
0
…
11
/
2
4
/
2
0
…
12
/
1
/
2
0
0
9
12
/
8
/
2
0
0
9
12
/
1
5
/
2
0
…
12
/
2
2
/
2
0
…
12
/
2
9
/
2
0
…
1/
5
/
2
0
1
0
1/
1
2
/
2
0
1
0
1/
1
9
/
2
0
1
0
1/
2
6
/
2
0
1
0
2/
2
/
2
0
1
0
2/
9
/
2
0
1
0
2/
1
6
/
2
0
1
0
2/
2
3
/
2
0
1
0
3/
2
/
2
0
1
0
3/
9
/
2
0
1
0
3/
1
6
/
2
0
1
0
0.4
0.5
0.6
0.7
0.8
0.9
1
(m
g
/
L
)
TWN-8 Nitrate Concentrations
TWN-8 Nitrate Concentrations are all Non Detect
0
0.1
0.2
0.3
8/
2
5
/
2
0
0
9
9/
1
/
2
0
0
9
9/
8
/
2
0
0
9
9/
1
5
/
2
0
0
9
9/
2
2
/
2
0
0
9
9/
2
9
/
2
0
0
9
10
/
6
/
2
0
0
9
10
/
1
3
/
2
0
…
10
/
2
0
/
2
0
…
10
/
2
7
/
2
0
…
11
/
3
/
2
0
0
9
11
/
1
0
/
2
0
…
11
/
1
7
/
2
0
…
11
/
2
4
/
2
0
…
12
/
1
/
2
0
0
9
12
/
8
/
2
0
0
9
12
/
1
5
/
2
0
…
12
/
2
2
/
2
0
…
12
/
2
9
/
2
0
…
1/
5
/
2
0
1
0
1/
1
2
/
2
0
1
0
1/
1
9
/
2
0
1
0
1/
2
6
/
2
0
1
0
2/
2
/
2
0
1
0
2/
9
/
2
0
1
0
2/
1
6
/
2
0
1
0
2/
2
3
/
2
0
1
0
3/
2
/
2
0
1
0
3/
9
/
2
0
1
0
3/
1
6
/
2
0
1
0
11
11.2
11.4
11.6
11.8
12
12.2
(m
g
/
L
)
TWN-8 Chloride Concentrations
10.4
10.6
10.8
11
8/
2
5
/
2
0
0
9
9/
1
/
2
0
0
9
9/
8
/
2
0
0
9
9/
1
5
/
2
0
0
9
9/
2
2
/
2
0
0
9
9/
2
9
/
2
0
0
9
10
/
6
/
2
0
0
9
10
/
1
3
/
2
0
…
10
/
2
0
/
2
0
…
10
/
2
7
/
2
0
…
11
/
3
/
2
0
0
9
11
/
1
0
/
2
0
…
11
/
1
7
/
2
0
…
11
/
2
4
/
2
0
…
12
/
1
/
2
0
0
9
12
/
8
/
2
0
0
9
12
/
1
5
/
2
0
…
12
/
2
2
/
2
0
…
12
/
2
9
/
2
0
…
1/
5
/
2
0
1
0
1/
1
2
/
2
0
1
0
1/
1
9
/
2
0
1
0
1/
2
6
/
2
0
1
0
2/
2
/
2
0
1
0
2/
9
/
2
0
1
0
2/
1
6
/
2
0
1
0
2/
2
3
/
2
0
1
0
3/
2
/
2
0
1
0
3/
9
/
2
0
1
0
3/
1
6
/
2
0
1
0
6
8
10
12
14
(m
g
/
L
)
TWN-9 Nitrate Concentrations
0
2
4
Au
g
-
09
Se
p
-
09
Oc
t
-
0
9
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
100
150
200
250
(m
g
/
L
)
TWN-9 Chloride Concentrations
0
50
Au
g
-
09
Se
p
-
09
Oc
t
-
0
9
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
0.8
1
1.2
1.4
1.6
1.8
(m
g
/
L
)
TWN-10 Nitrate Concentrations
0
0.2
0.4
0.6
Au
g
-
09
Se
p
-
09
Oc
t
-
0
9
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
30
40
50
60
(m
g
/
L
)
TWN-10 Chloride Concentrations
0
10
20
Au
g
-
09
Se
p
-
09
Oc
t
-
0
9
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
1.32
1.34
1.36
1.38
1.4
1.42
(m
g
/
L
)
TWN-11 Nitrate Concentrations
1.24
1.26
1.28
1.3
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
73.2
73.4
73.6
73.8
74
74.2
(m
g
/
L
)
TWN-11 Chloride Concentrations
72.4
72.6
72.8
73
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
0.3
0.4
0.5
0.6
0.7
0.8
(m
g
/
L
)
TWN-12 Nitrate Concentrations
0
0.1
0.2
0.3
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
110
111
112
113
114
(m
g
/
L
)
TWN-12 Chloride Concentrations
107
108
109
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
0.3
0.4
0.5
0.6
(m
g
/
L
)
TWN-13 Nitrate Concentrations
0
0.1
0.2
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
40
50
60
70
80
90
(m
g
/
L
)
TWN-13 Chloride Concentrations
0
10
20
30
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
3
3.1
3.2
3.3
3.4
3.5
(m
g
/
L
)
TWN-14 Nitrate Concentrations
2.6
2.7
2.8
2.9
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
15
20
25
30
35
(m
g
/
L
)
TWN-14 Chloride Concentrations
0
5
10
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
0.6
0.8
1
1.2
(m
g
/
L
)
TWN-15 Nitrate Concentrations
0
0.2
0.4
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
40
50
60
70
80
90
(m
g
/
L
)
TWN-15 Chloride Concentrations
0
10
20
30
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
1.05
1.1
1.15
1.2
1.25
(m
g
/
L
)
TWN-16 Nitrate Concentrations
0.9
0.95
1
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
36
37
38
39
40
(m
g
/
L
)
TWN-16 Chloride Concentrations
33
34
35
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
6
8
10
12
(m
g
/
L
)
TWN-17 Nitrate Concentrations
0
2
4
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
60
80
100
120
140
160
(m
g
/
L
)
TWN-17 Chloride Concentrations
0
20
40
60
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
0.8
1
1.2
1.4
1.6
1.8
(m
g
/
L
)
TWN-18 Nitrate Concentrations
0
0.2
0.4
0.6
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
30
40
50
60
(m
g
/
L
)
TWN-18 Chloride Concentrations
0
10
20
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
7.25
7.3
7.35
7.4
7.45
(m
g
/
L
)
TWN-19 Nitrate Concentrations
7.1
7.15
7.2
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
120
122
124
126
(m
g
/
L
)
TWN-19 Chloride Concentrations
114
116
118
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
6.9
7
7.1
7.2
7.3
7.4
7.5
(m
g
/
L
)
Peizometer 1 Nitrate Concentrations
6.5
6.6
6.7
6.8
Fe
b
-
0
9
Ma
r
-
0
9
Ap
r
-
0
9
Ma
y
-
0
9
Ju
n
-
0
9
Ju
l
-
0
9
Au
g
-
0
9
Se
p
-
0
9
Oc
t
-
0
9
40
50
60
70
80
90
(m
g
/
L
)
Peizometer 1 Chloride Concentrations
0
10
20
30
Ju
l
-
0
9
Au
g
-
09
Se
p
-
09
Oc
t
-
0
9
0.52
0.54
0.56
0.58
0.6
0.62
(m
g
/
L
)
Peizometer 2 Nitrate Concentrations
0.44
0.46
0.48
0.5
Fe
b
-
0
9
Ma
r
-
0
9
Ap
r
-
0
9
Ma
y
-
0
9
Ju
n
-
0
9
Ju
l
-
0
9
Au
g
-
0
9
Se
p
-
0
9
Oc
t
-
0
9
8
10
12
14
16
18
(m
g
/
L
)
Peizometer 2 Chloride Concentrations
0
2
4
6
Ju
l
-
0
9
Au
g
-
09
Se
p
-
09
Oc
t
-
0
9
0.8
1
1.2
1.4
1.6
1.8
(m
g
/
L
)
Peizometer 3 Nitrate Concentrations
0
0.2
0.4
0.6
Fe
b
-
0
9
Ma
r
-
0
9
Ap
r
-
0
9
Ma
y
-
0
9
Ju
n
-
0
9
Ju
l
-
0
9
Au
g
-
0
9
Se
p
-
0
9
Oc
t
-
0
9
No
v
-
0
9
De
c
-
0
9
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
60
80
100
120
140
(m
g
/
L
)
Peizometer 3 Chloride Concentrations
0
20
40
Ju
l
-
0
9
Au
g
-
09
Se
p
-
09
Oc
t
-
0
9
No
v
-
09
De
c
-
09
Ja
n
-
1
0
Fe
b
-
1
0
Ma
r
-
1
0
0.8
1
1.2
1.4
1.6
1.8
2
(m
g
/
L
)
Peizometer 4 Nitrate Concentrations
0
0.2
0.4
0.6
7/
1
4
/
2
0
0
9
20
25
30
35
40
45
50
(m
g
/
L
)
Peizometer 4 Chloride Concentrations
0
5
10
15
7/
1
4
/
2
0
0
9
0.3
0.4
0.5
0.6
0.7
0.8
(m
g
/
L
)
Peizometer 5 Nitrate Concentrations
0
0.1
0.2
7/
1
4
/
2
0
0
9
8
10
12
14
16
18
20
(m
g
/
L
)
Peizometer 5 Chloride Concentrations
0
2
4
6
7/
1
4
/
2
0
0
9
0.4
0.5
0.6
0.7
0.8
0.9
1
(m
g
/
L
)
MW-18 Nitrate Concentrations
0
0.1
0.2
0.3
7/
1
4
/
2
0
0
9
30
40
50
60
(m
g
/
L
)
MW-18 Chloride Concentrations
0
10
20
7/
1
4
/
2
0
0
9
1
1.5
2
2.5
(m
g
/
L
)
MW-19 Nitrate Concentrations
0
0.5
7/
1
4
/
2
0
0
9
15
20
25
30
(m
g
/
L
)
MW-19 Chloride Concentrations
0
5
10
7/
1
4
/
2
0
0
9
0.4
0.5
0.6
0.7
0.8
0.9
1
(m
g
/
L
)
Wildlife Pond Nitrate Concentrations
0
0.1
0.2
0.3
Se
p
-
09
Oc
t
-
0
9
3
4
5
6
(m
g
/
L
)
Wildlife Pond Chloride Concentrations
0
1
2
Se
p
-
09
Oc
t
-
0
9
0.4
0.5
0.6
0.7
0.8
0.9
1
(m
g
/
L
)
Frog Pond Nitrate Concentrations
0
0.1
0.2
0.3
10
/
1
4
/
2
0
0
9
0.4
0.5
0.6
0.7
0.8
0.9
1
(m
g
/
L
)
Frog Pond Chloride Concentrations
0
0.1
0.2
0.3
1/
1
/
1
9
0
0

Tab L
CSV Transmittal Letter

Jo Ann Tischler
From:
Sent:
To:
Cc:
Subject:
Attachments:
Dear Mr.Finerfrock,
Jo Ann Tischler
Thursday,May 27,2010 2:44 PM
'Dane Finerfrock'
David Frydenlund;Harold Roberts
Transmittal of CSV Files White Mesa Mill 2010 Q1 Nitrate Monitoirng
C10030674.csv;C10030840.csv
Attached to this email are electronic copies of laboratory results for nitrate monitoring conducted at the White Mesa
Mill during the first quarter of 2010,in Comma Separated Value (CSV)format.
Please contact me at 303-389-4132 if you have any questions on this transmittal.
Your Truly,
Jo Ann Tischler
Denison Mines (USA)Corp.
Director,Compliance and Permitting
1