DRC-2010-006184 - 0901a068801e458b

DENISO
MINES
2010-006
Received
NOV 2010
DiVisionof
Rat'iation Confro/
Sent VIA Federal Express
November 24, 2010
Mr. Rusty Lundberg
Co-Executive Secretary
Utah Water Quality Board
Utah Department of Environmental Quality
195 North 1950 West
P.O. Box 144810
Salt Lake City, UT 84114-4820
Denison Mines (USA) Corp.
1050 17th Street, Suite 950
Denver, CO 80265
USA
Tel: [phone]
Fax: [phone]
vmw.denlscininines.com
Re: Transmittal of 3rd Quarter 2010 Chloroform Monitoring Report
Groundwater Quality Discharge Permit UGW370004 White Mesa Uranium Mill
Dear Mr. Lundberg:
Enclosed are two copies of the White Mesa Uranium Mill Chloroform Monitoring Report for the
3rd Quarter of 2010 as required by the Groundwater Quality Discharge Permit UGW370004, 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.
DEik^iifi j^iNES (USA) CORP.
Jo Ann Tischler
Director, Compliance and Permitting
CC: Ron F. Hochstein
David C. Frydenlund
Harold R. Roberts
David E. Turlc
Kathy Weinel
White Mesa Uranium Mill
Chloroform Monitoring Report
State of Utah
Notice of Violation and Groundwater Corrective Action Order UDEQ
Docket No. UGQ-20-01
3rd Quarter
(July through September)
2010
Prepared by:
Denison Mines (USA) Corp.
1050 1 i h Street, Suite 950
Denver CO 80265
November 24,2010
TABLE OF CONTENTS
1.0 INTRODUCTION ................................................................................................. 1
2.0 CHLOROFORM MONITORING ....................................................................... 1
2.1 Samples and Measurements Taken During the Quarter ...................................... 1
2.1.1 Chloroform Monitoring ............................................................................... 1
2.1.2 Parameters Analyzed ................................................................................... 2
2.1.3 Groundwater Head Monitoring .................................................................... 2
2.2 Sampling Methodology and Equipment and Decontamination Procedures ........ 3
2.2.1 Well Purging and Depth to Groundwater .................................................... 3
2.2.2 Sample Collection ........................................................................................ 4
2.3 Field Data ............................................................................................................. 4
2.4 Depth to Groundwater Data and Water Table Contour Map ............................... 5
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 .................................... 6
3.1 Field QC Samples ................................................................................................ 6
3.2 Adherence to Mill Sampling SOPs ...................................................................... 7
3.3 Analyte Completeness Review ............................................................................ 7
3.4 Data Validation .................................................................................................... 7
3.4.1 Field Data QAlQC Evaluation ..................................................................... 7
3.4.2 Holding Time Evaluation ............................................................................ 9
3.4.3 Receipt Temperature Evaluation ................................................................. 9
3.4.4 Analytical Method Checklist ....................................................................... 9
3.4.5 Reporting Limit Evaluation ......................................................................... 9
3.4.6 Trip Blank Evaluation .................................................................................. 9
3.4.7 QNQC Evaluation for Sample Duplicates ................................................ 10
3.4.8 Rinsate Sample Check ............................................................................... 1 0
3.4.9 Other Laboratory QAlQC .......................................................................... 13
4.0 INTERPRETATION OF DATA ........................................................................ 14
4.1 Interpretation of Groundwater Levels, Gradients and Flow Directions ............ 14
4.1.1 Current Site Groundwater Contour Map ................................................... 14
4.1.2 Comparison of Current Groundwater Contour Maps to Groundwater Contour
Map for Previous Quarter .......................................................................... 14
4.1.3 Hydrographs .............................................................................................. 15
4.1.4 Depth to Groundwater Measured and Groundwater Elevation ................. 15
4.1.5 Evaluation of the Effectiveness of Hydraulic Capture .............................. 15
4.2 Review of Analytical Results ............................................................................ 16
4.2.1 Current Chloroform Isoconcentration Map ............................................... 16
4.2.2 Chloroform Concentration Trend Data and Graphs .................................. 16
4.2.3 Interpretation of Analytical Data ...................................................................... 16
1
5.0 LONG TERM PUMP TEST AT MW-4, TW4-15 (MW-26), TW4-19, TW4-
20, AND TW4-4 OPERATIONS REPORT ....................................................... 18
5.1 Introduction ........................................................................................................ 18
5.2 Pump Test Data Collection ................................................................................ 18
5.3 Water Level Measurements ............................................................................... 19
5.4 Pumping Rates and Volumes ............................................................................. 19
5.4.1 MW-4 ......................................................................................................... 19
5.4.2 TW4-19 ...................................................................................................... 20
5.4.3 TW4-15 (MW-26) ..................................................................................... 20
5.4.4 TW4-20 ...................................................................................................... 20
5.4.5 TW4-4 ........................................................................................................ 20
5.5 Mass Removed ................................................................................................... 21
5.6 Inspections ......................................................................................................... 21
5.7 Conditions That May Affect Water Levels in Piezometers ............................... 21
6.0 CORRECTIVE ACTION REPORT .................................................................. 21
6.1 Rinsate Sample Chloroform and Nitrate Levels ..................................................... 21
6.2 Assessment of Previous Quarter's Corrective Actions ........................................... 23
7.0 CONCLUSIONS AND RECOMMENDATIONS ............................................ 24
8.0 ELECTRONIC DATA FILES AND FORMAT ............................................... 25
9.0 SIGNATURE AND CERTIFICATION ............................................................ 26
LIST OF TABLES
Table 1 Summary of Well Sampling for the Period
Table 2 Mass of Chloroform Removed Per Well Per Quarter
11
INDEX OF TABS
Tab A Site Plan and Perched Well Locations White Mesa Site
Tab BOrder of Sampling and Field Data Worksheets
Tab C Weekly and Monthly Depth to Water Data
Tab D Kriged Current Quarter Groundwater Contour Map, Capture Zone Map, Capture
Zone Details Map, and Depth to Water Data Table
Tab E Kriged Previous Quarter Groundwater Contour Map
Tab F Hydrographs of Groundwater Elevations Over Time for Chloroform Monitoring
Wells
Tab G Depths to Groundwater and Elevations Over Time for Monitoring Wells
Tab H Laboratory Analytical Reports
Tab I Quality Assurance and Data Validation Tables
I-I Field Data QAlQC Evaluation
1-2 Holding Time Evaluation
1-3 Receipt Temperature Check
1-4 Analytical Method Check
1-5 Reporting Limit Evaluation
1-6 Trip Blank Evaluation
1-7 QAIQC Evaluation for Sample Duplicates
1-8 QC Control Limits for Analyses and Blanks
1-9 Rinsate Evaluation
Tab J Kriged Current Quarter Chloroform Isoconcentration Map
Tab K Analyte Concentration Data Over Time
Tab L Chloroform Concentration Trend Graphs
Tab M CSV Transmittal Letter
Tab N Disinfection Byproducts -Trihalomethanes
111
1.0 INTRODUCTION
The presence of chloroform was initially identified in groundwater at the White Mesa
Mill (the "Mill") as a result of split sampling performed in May 1999. The discovery
resulted in the issuance of State of Utah Notice of Violation ("NOV") and Groundwater
Corrective Action Order ("CAO") State of Utah Department of Environmental Quality
("UDEQ") Docket No. UGQ-20-01, which required that Denison Mines (USA) Corp.
("DUSA") submit a Contamination Investigation Plan and Report pursuant to the
provisions of UAC R317 -6-6.15(D).
The frequency of chloroform sampling, which was initially performed on a monthly
basis, was modified on November 8, 2003. Since that time all chloroform contaminant
investigation wells have been sampled on a quarterly basis.
This is the Quarterly Chloroform Monitoring Report for the third quarter of 2010 as
required under the NOV and CAO. This Report also includes the Operations Report for
the Long Term Pump Test at MW-4, TW4-19, TW4-15 (MW-26), TW4-20, and TW4-4
for the quarter.
2.0 CHLOROFORM 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. Chloroform samples and measurements
taken during this reporting period (July through September), are discussed in the
remainder of this section.
2.1.1 Chloroform Monitoring
Quarterly sampling for chloroform monitoring parameters is currently required in the
following wells:
TW4-1
TW4-2
TW4-3
TW4-4
TW4-5
TW4-6
TW4-7
TW4-8
TW4-9
TW4-10
TW4-11
TW4-12
TW4-13
TW4-14
TW4-16
TW4-18
TW4-19
TW4-20
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TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
MW-4
MW-26 (TW4-15)
MW-32 (TW4-17)
TW4-26
Table 1 provides an overview of all wells sampled during the current period, along with
the date samples were collected from each well, and the date(s) which analytical data
were received from the contract laboratory. Table 1 also identifies equipment rinsate
samples collected, as well as sample numbers associated with the deionized (DI) field
blank and any required duplicates. Four wells (TW4-1, TW4-16, TW4-22, and TW4-24)
were resampled during this period for all constituents due to turbidity issues.
As indicated in Table 1, chloroform monitoring was performed in all of the required
chloroform monitoring wells.
2.1.2 Parameters Analyzed
Wells sampled during this reporting period were analyzed for the following constituents:
• Chloroform
• Chloromethane
• Carbon tetrachloride
• Methylene chloride
• Chloride
• Nitrate plus Nitrite as Nitrogen
Use of analytical methods is consistent with the requirements of the Chloroform
Investigation Monitoring Quality Assurance Program (the "Chloroform QAP") attached
as Appendix A to the White Mesa Uranium Mill Groundwater Monitoring Quality
Assurance Plan ("QAP").
2.1.3 Groundwater Head 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 monitoring well MW -4 and all of the temporary chloroform investigation
wells.
• Piezometers -P-1, P-2, P-3, P-4 and P-S.
• MW-20andMW-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 S calendar days of each other as indicated by the measurement data in the
summary sheet under Tab D.
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In addition, weekly and monthly depth to groundwater measurements were taken in MW-
4, TW4-15 (MW-26), TW4-19, TW4-20, and, commencing regularly on March 1, 2010
for TW4-4, as part ofthe long term pumping test for MW-4.
2.2 Sampling Methodology and Equipment and Decontamination Procedures
DUSA completed, and transmitted to UDEQ on May 25, 2006, a revised QAP for
sampling under the Mill's GWDP. While the water sampling conducted for chloroform
investigation purposes has conformed to the general principles set out in the QAP, some
of the requirements in the QAP were not fully implemented prior to UDEQ's approval,
for reasons set out in correspondence to UDEQ dated December 8, 2006. Subsequent to
the delivery of the December 8, 2006 letter, DUSA discussed the issues brought forward
in the letter with UDEQ and has received correspondence from UDEQ about those issues.
In response to UDEQ's letter and subsequent discussions with UDEQ, DUSA has
incorporated changes in chloroform Quality Assurance ("QA") procedures in the form of
the Chloroform QAP, which is a separate Appendix A to the QAP. The Chloroform QAP
describes the differing needs of the chloroform investigation program, and is an
attachment to the GWDP QAP where QA requirements for the chloroform investigation
are addressed. On June 20, 2009 the Chloroform QAP was modified to require that the
quarterly chloroform reports include additional items specific to DUSA's ongoing pump
testing and chloroform capture efforts.
The sampling methodology, equipment and decontamination procedures that were
performed for the chloroform contaminant investigation, as summarized below, are
consistent with the QAP and the Chloroform QAP.
2.2.1 Well Purging and Depth to Groundwater
A list of the wells in order of increasing chloroform 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 chloroform contamination.
Before leaving the Mill office, the portable pump and hose are rinsed with DI water. Mill
personnel then proceed to the first well which is the well with the lowest concentration of
chloroform based on the previous quarter's sampling results. Well depth measurements
are taken and the two casing volumes are calculated for those wells which do not have a
dedicated pump (measurements are made using the same instrument used for the
monitoring wells under the Mill's GWDP). If the well has a dedicated pump, it is
pumped on a set schedule per the remediation plan and is considered sufficiently
evacuated to immediately collect a sample; however, if a pumping well has been out of
service for 48 hours or more, DUSA will follow the purging requirements outlined in
Section 6.2.7(d)(v) of the QAP. The dedicated pump is used to collect parameters and to
collect the samples. If the well does not have a dedicated pump, a Grundfos pump (9 -10
gpm pump) is then lowered to the screened interval in the well and purging is started.
The purge rate is established for the well by using a calibrated 5 gallon bucket. The
purging of the well is completed per Section 6.2.5 of the QAP. In wells where the
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portable pump is used, a disposable bailer is used to collect the samples the day following
purging activities. After each use, the portable pump is decontaminated and a rinsate
sample is collected prior to reuse at the next sample location. This purging process is
repeated at each well location moving from least contaminated to the most contaminated
well. All wells are capped and secured prior to leaving the sampling location.
2.2.2 Sample Collection
Samples are collected as described above. In all cases, on days when samples will be
collected, a cooler with ice is prepared. The trip blank is also gathered at that time (the
trip blank for these events is provided by the Analytical Laboratory). 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. Chloroform investigation samples are collected by means of
disposable bailers.
Mill personnel use a disposable bailer to sample each well that does not have a dedicated
pump. 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 and
the sample bottles are filled as follows:
• Volatile Organic Compound ("VOC") samples are collected first. This sample
consists of three 40 ml vials provided by the Analytical Laboratory. The VOC
sample is not filtered and is preserved with HCI;
• A sample for nitrate/nitrite is then collected. This sample consists of one 250 ml.
bottle which is provided by the Analytical Laboratory. The nitrate/nitrite sample
is also not filtered and is preserved with H2S04;
• A sample for chloride is then collected. This sample consists of one 500 ml.
bottle which is provided by the Analytical Laboratory. The chloride sample is
also not filtered and is not chemically preserved.
After the samples have been collected for a particular well, the bailer is disposed of and
the samples are placed into the cooler that contains ice. The well is then recapped and
Mill personnel proceed to the next well.
2.3 Field Data
Attached under Tab B are copies of all Field Data Worksheets that were completed
during the quarter for the chloroform contaminant investigation monitoring wells
identified in paragraph 2.1.1 above, and Table 1.
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2.4 Depth to Groundwater Data and Water Table Contour Map
Attached under Tab C are copies of the Depth to Water Sheets for the weekly monitoring
of MW-4, TW4-15 (MW-26), TW4-19, TW4-20, and commencing regularly on March 1,
2010, TW4-4, as well as the monthly depth to groundwater data for chloroform
contaminant investigation wells measured during the quarter that are not included in Tab
D. Depth to groundwater measurements which were utilized for groundwater contours
are included on the Quarterly Depth to Water Worksheet at Tab D of this report, along
with the kriged groundwater contour map for the current quarter generated from this data.
In review of the Quarterly Depth to Water Worksheet (which is not the field data sheet
contemplated by the QAP) it was noted that the millimeters of mercury (MMHG) that is,
the barometric pressure, was not recorded for the quarter. This measurement is not
required by either the Permit or the QAP and as such there is no effect on the data
collected and no corrective action is required. All of the water level measurements used
for the contour map were collected within 5 days of each other as indicated by the
measurement dates in the summary sheet under Tab D. A copy of the kriged
groundwater contour map generated from the 2nd quarter 2010 data is provided under
TabE.
2.S Laboratory Results
2.5.1 Copy of Laboratory Results
All analytical results were provided by Energy Laboratories ("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 third quarter chloroform contaminant
investigation are provided under Tab H of this Report. Also included under Tab H are
the results of analyses for duplicate samples and rinsate samples for this sampling effort,
as identified in Table 1, as well as results for trip blank analyses required by the
Chloroform QAP.
2.5.2 Regulatory Framework
As discussed in Section 1.0, above, the NOV and requirements of the CAO triggered a
series of actions on DUSA's part. In addition to the monitoring program, DUSA has
equipped five wells with pumps to recover impacted groundwater, and has initiated
recovery of chloroform from the perched zone. The fifth well, TW4-4, was installed in
January 2010, and commenced pumping on January 31, 2010. It was not fully equipped
for flow measurement until March 31, 2010, when pumping and groundwater capture
flowrates and totals were first recorded.
Sections 4 and 5, below, interpret the groundwater level and flow information,
contaminant analytical results, and pump test data to assess effectiveness of DUSA's
chloroform capture program.
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3.0 QUALITY ASSURANCE AND DATA VALIDATION
The QA Manager performed a QA/Quality Control ("QC") review to confirm compliance
of the monitoring program with requirements of the QAP. As required in the QAP, data
QA includes preparation and analysis of QC samples in the field, review of field
procedures, an analyte completeness review, and QC review of laboratory 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 laboratory data QA/QC are discussed in
Sections 3.4.4 through 3.4.9 below.
The analytical laboratory has provided summary reports of the analytical quality QAlQC
measurements necessary to maintain conformance with National Environmental
Laboratory Accreditation Conference ("NELAC") certification and reporting protocol.
The Analytical Laboratory QAlQC 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 H. Results of review of the laboratory
QAlQC information are provided under Tab I and are discussed in Section 3.4, below.
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 chloroform investigation program consist of one field duplicate
sample for each 20 samples, a trip blank for each shipped cooler which contains VOCs,
one DI Field Blank (DIFB) and rinsate samples.
During the third 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 chloroform wells.
Three trip blanks were provided by Energy Laboratories and returned with the quarterly
chloroform monitoring samples.
Rinsate samples were also collected between well samples where nondedicated purging
equipment was used. Rinsate samples were labeled with the name of the subsequently
purged well with a terminal letter "R" added (e.g. TW4-7R). The results of these
analyses are included with the routine analyses under Tab H.
In addition, one DIFB, while not required by the Chloroform QAP, was collected and
analyzed for the same constituents as the well samples and rinsate samples.
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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 QAlQC requirements established in the QAP and Chloroform
QAP were being adhered to and that the SOPs were implemented, except as described
below.
One site procedure requiring clarification was noted during the QA Manager's review of
the field data. As previously stated, a list of the wells in order of increasing chloroform
contamination (based on the previous quarter's data) is generated quarterly to determine
the order for purging prior to sampling. The QAP wording implies that the samples will
be collected in the same order. Chloroform wells are purged in order of least
contaminated to most contaminated to preclude cross-contamination. Sampling order
may deviate slightly from the generated list. This deviation does not affect the samples
for 2 reasons: 1) the continuously pumped wells have dedicated pumps and cross-
contamination is not possible; 2) wells are sampled with disposable bailers and cross-
contamination resulting from the sampling process is not possible. This deviation does
not affect the quality or usability of the data as there is no increase in cross-contamination
resulting from sampling order. DUSA intends to propose an amendment to address this
in the next revision of the QAP.
3.3 Analyte Completeness Review
All analyses required by the GWDP for chloroform monitoring for the period were
performed.
3.4 Data Validation
The QAP and GWDP identify the data validation steps and data QC checks required for
the chloroform monitoring program. Consistent with these requirements, the QA
Manager performed the following evaluations: a field data QAlQC evaluation, a holding
time check, a receipt temperature check, an analytical method check, a reporting limit
evaluation, a trip blank check, a QAlQC evaluation of sample duplicates, a QC Control
Limit check for Analyses and blanks including the DIFB and a rinsate sample check.
Each evaluation is discussed in the following sections. Data check tables indicating the
results of each test are provided under Tab 1.
3.4.1 Field Data QAlQC 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
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 as indicated by the
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measurement dates in the summary sheet under Tab D. The results of this quarter's
review of field data are provided under Tab 1.
Based upon this review, all non-pumping wells conformed to the QAP requirement to
evacuate two well casing volumes before sampling except TW 4-2, TW 4-7, TW 4-14, and
TW4-26. All of these wells were 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. In addition, TW4-1, TW4-6, TW4-10, and TW4-13
were pumped to dryness after 2 casing volumes were evacuated.
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 Relative Percent Difference
("RPD") (other than the wells that were pumped to dryness and the wells which are
continually pumped, for which this requirement does not apply), except as follows.
The review of the field sheets for compliance with QAP requirements resulted in the
observations noted below. The requirements in Section 6.2.7 of the QAP specifically
state that field parameters must have stabilized to within 10% over at least 2 consecutive
measurements. The QAP states that turbidity should be less than 5 Nephelometric
Turbidity Units ("NTU") prior to sampling unless the well is characterized by water that
has a higher turbidity. The QAP does not require that turbidity measurements be less
than 5 NTU prior to sampling. As such, the noted observations regarding turbidity
measurements less than 5 NTU below are included for information purposes only.
Six wells did not meet the requirement for the stabilization of turbidity within 10% RPD.
TW4-2, TW4-6, TW4-10, TW4-14, and TW4-26 were purged to dryness prior to the
achievement of stabilization for turbidity. TW4-19 is a continuously pumped well. As
previously stated, the continuously pumped wells are excluded from the QAP goals and
requirements because, if a well is continuously pumped, it is pumped on a set schedule
per the remediation plan and is considered sufficiently evacuated to immediately collect a
sample. For continuously pumped wells, the field parameters are therefore collected for
information purposes only.
Twenty four turbidity measurements exceeded the QAP's 5 NTU goal. Of the 24 wells,
seven wells were pumped to dryness and five are continuously pumped wells. The seven
wells that are pumped to dryness and the five continuously pumped wells are excluded
from the QAP goals.
DUSA's letter to DRC of March 26,2010 discusses further why turbidity does not appear
to be an appropriate parameter for assessing well stabilization. In response to DRC's
subsequent correspondence dated June 1, 2010 and June 24, 2010, DUSA is currently
implementing a groundwater monitoring well redevelopment program. The
redevelopment program has reviewed the available turbidity data for the Chloroform
wells and has developed a list of wells that have or will undergo redevelopment utilizing
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several strategies. The redevelopment strategies include additional surging and bailing
and overpumping as necessary. At the completion of the redevelopment program, DUSA
will review the redevelopment data and summarize the status of the Chloroform wells.
Redevelopment results will be discussed with DRC in an effort to come to a consensus
regarding any additional redevelopment steps and/or future turbidity considerations for
the Chloroform wells at the Mill site.
One other field parameter was outside of the QAP requirement for 10% stabilization
criteria. The temperature measurement in TW4-10 had an RPD of52.39% because TW4-
10 was purged to dryness prior to the achievement of stabilization.
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 Tab I. 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
which specifies that samples be received at 6°C or lower. Sample temperatures checks
are provided in Tab I. All samples were received within the required temperature limit.
3.4.4 Analytical Method Checklist
All analytical methods reported by the laboratory were checked against the required
methods enumerated in the Chloroform QAP. Analytical method checks are provided in
Tab I. All methods were consistent with the requirements of the Chloroform 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 Chloroform QAP. Reporting Limit Checks are
provided under Tab I. All analytes were measured and reported to the required reporting
limits, except 26 sets of sample results (25 wells, and 1 duplicate) had the reporting limit
raised for at least one analyte due to matrix interference and/or sample dilution. In all
cases the reported value for the analyte was higher than the increased detection limit.
3.4.6 Trip Blank Evaluation
All trip blank results were reviewed to identify any VOC contamination resulting from
transport of the samples. Trip blank checks are provided in Tab I. All trip blank results
were less than detection level for all VOC analytes.
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3.4.7 QAlQC Evaluation for Sample Duplicates
Section 9.1.4 a) of the QAP states that RPDs will be calculated for the comparison of
duplicate and original field samples. The QAP acceptance limits for RPDs between the
duplicate and original field sample is less than or equal to 20% unless the measured
results (described as activities in the QAP) are less than 5 times the required detection
limit. This standard is based on the EPA Contract Laboratory Program National
Functional Guidelines for Inorganic Data Review, February 1994, 9240.1-05-01 as cited
in the QAP. The RPDs are calculated for all duplicate pairs for all analytes regardless of
whether or not the reported concentrations are greater than 5 times the required detection
limits; however, data will be considered noncompliant only when the results are greater
than 5 times the reported detection limit and the RPD is greater than 20%. The additional
duplicate information is provided for information purposes.
All analytical results except for carbon tetrachloride and chloroform in sample/duplicate
pair TW4-211TW4-65 were within the 20% RPD acceptance limits. The chloroform
result is compliant with the QAP because the reporting limit for that analyte in that
sample was raised to 100 ug/L and both results are not greater than 5 times the reporting
limit. The RPD is included for information purposes only. The carbon tetrachloride
results are both greater than 5 times the reporting limit. The data are, however, within the
acceptable allowable error limits of the methods and as such do not affect the usability of
the data. Results of the RPD test are provided in Tab I.
3.4.8 Rinsate Sample Check
Rinsate sample checks are provided in Tab I.
Chloroform
A review of the analytical results reported for rinsate samples indicated that five rinsate
samples contained chloroform. The rinsate sample chloroform levels ranged from 1.1 to
8.2 ug/L. A DIFB was analyzed and was reported as nondetect.
A comparison of the rinsate concentration levels to the QAP requirements -that rinsate
sample concentrations of the sampling equipment be one order of magnitude lower than
that of the actual well -indicated that all five of the samples met these criteria for
chloroform. This criterion however, is inappropriate for the rinsate sample data collected
during the chloroform sampling program because rinsate samples are collected from the
decontaminated portable pump used for well purging, and the pump is not used for
sample collection. As stated in Section 2.2.1, wells that do not have a dedicated pump
are purged using a portable pump. In wells where the portable pump is used for purging,
a disposable bailer is used to collect the samples the day following purging activities.
Rinsate samples collected from the portable pump may be indicative of possible cross-
contamination resulting from pump usage during the purging process under the Mill's
sampling program the rinsate blank sample results are not directly applicable to the
sample results due to the use of different equipment (disposable bailers) for the sample
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collection. The pump used for purging does not come into contact with the samples at
any time during the sample collection process. Any chloroform left in the well from
pump cross-contamination is reduced or negated by the influx of formation water into the
well in the time after purging and prior to sampling. Because samples are collected the
day following purging and using different equipment the cross-contamination resulting
from the pump use or decontamination fluids is not applicable to the sample results
because the pump does not contact the samples. As noted in previous reports, an
investigation into the source of the chloroform and nitrate contamination present in the
rinsate blanks has been ongoing. Below are the results of the source investigations, and
corrective actions are detailed in Section 6.2.
As previously stated, chloroform has been present in the rinsate blanks in previous
quarters. Based on the investigation into the source of chloroform, DUSA believes that
the potential source for the chloroform present in the rinsate blanks may have been
identified. The data collected during the source investigations are as follows:
• Review of the chloroform detections has shown that there is no correlation
between the rinsate blank concentrations and the sample concentrations in the
wells sampled prior to or subsequent to a rinsate blank sample (Chloroform
Monitoring Report 2nd Quarter 2010, August 30, 2010).
• Chloroform is occasionally present in the DIFB, but the concentrations are not
consistent, and the presence of chloroform in the DIFB is also not consistent.
• Chloroform presence in the rinsate blanks is higher, both in the number of rinsate
blank samples with chloroform as well as the concentrations themselves, on days
of high usage of the DI water system.
• It is known from EPA studies that chloroform is frequently a byproduct of the
chlorination process in potable water supplies.
Based on these findings, DUSA believes the chloroform contamination in the DI water is
most likely the result of chlorination of the intake water used for the DI system. There
are multiple sources which cite the creation of chloroform as a byproduct of chlorination,
and two of them are: (EPA -Basic Information about Disinfection Byproducts in
Drinking Water: Total Trihalomethanes, Haloacetic Acids, Bromate and Chlorite and
Water Research Net etc.). For convenience, the two sources cited herein are attached as
Tab N to this report. The chloroform is most likely the result of the chlorination of the
potable water at the Mill which is subsequently fed to the DI system. The water is free of
chloroform prior to chlorination, as it is tested by the Utah Department of Health,
Division of Epidemiology and Laboratory Services on a routine basis. The chlorine
added reacts with the naturally occurring organic and inorganic materials in the water.
The DI system is designed to remove the chloroform; however, due to the large volume
of DI water processed through the system during the chloroform sampling events (e.g.
1050 gallons on the first day of sampling third quarter 2010) to accommodate the
decontamination needs, breakthrough appears to occur under heavy usage when the
system is "stressed". Removal of chloroform and other organics is accomplished by the
"activated carbon" portion of the DI system. The performance of this portion of the DI
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system is directly proportional to the volume of water treated and, due to the large
volumes of water treated in a short time, the system becomes "stressed" and performance
decreases resulting in chloroform "breakthrough". This is supported by the chloroform
data for the rinsate blanks for second quarter 20 1 a as well as the rinsate data from this
sampling period. In the second quarter 2010, the chloroform concentrations in the rinsate
blanks increased from the beginning of the sampling event to the end. Also in second
quarter 2010 there were rinsate blanks with detections associated with samples that were
nondetect. In the third quarter 2010, the rinsate blanks collected at the beginning of the
period had no chloroform, however; later in the sampling program there were chloroform
detections in the rinsate blanks -the result of the DI system breakthrough. Lastly,
breakthrough is suspected as the pH of the rinsate blanks changes over the course of the
sampling period indicating a change in the overall system operation.
Corrective actions and verification actions are described in Section 6.2.
Nitrate
In addition, six rinsate samples had reported low level concentrations of nitrate. A DIFB
was analyzed and was reported as nondetect for nitrate. A comparison of the rinsate
sample concentration levels to the QAP requirements -that rinsate sample concentrations
be one order of magnitude lower than that of the actual well -indicated that one sample
did not meet this criterion. In this case the rinsate sample reported detections and the
subsequent sample results were nondetect. As previously stated, the criteria to compare
the rinsate sample results to the well sample results are inappropriate for the rinsate
sample data collected during the chloroform investigation for the reasons stated above.
The nitrate levels reported in the rinsate samples for this investigation are similar to the
nitrate rinsate sample concentrations reported for the previous nitrate sampling programs.
Data collected for this ongoing investigation are as follows:
• The nitrate concentrations in the rinsate samples from both the chloroform
sampling program and the nitrate sampling program are just at or slightly above
the detection limit and are not dependent on or affected by the previous sample
concentrations.
• The presence of nitrate in both the chloroform and nitrate sampling programs
indicates that the contamination is due to external factors such as the nitric acid
rinse during the decontamination process and potential contamination issues
associated with the use of nitrile gloves in the presence of nitric acid.
• Nitrate was detected in a minimum of samples collected for the third quarter 2010
nitrate sampling program.
The introduction of chloroform into the DI system is suspected of contributing to the
chloroform in the rinsate blank samples due to the large volumes of water treated in a
short time to accommodate the decontamination needs. It appears as if the contamination
in the rinsate blanks is not due to cross-contamination from the purging process. The
investigation into the nitrate in the rinsate blanks is continuing, with additional focus on
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the nitrile glove usage in the presence of nitric acid as well as the rinsate collection
process. Nitric acid introduced during the decontamination process is the single highest
possible source of nitrate ions. However, there may be some contribution of nitrate from
the decontamination process and/or the nitrile gloves. To address these issues, the
decontamination process and rinsate collection process are being reviewed to determine if
the nitrile gloves in combination with the nitric acid wash used during the
decontamination process are causing the nitrate detections in the rinsate blanks.
Corrective actions are described in Section 6.2.
3.4.9 Other Laboratory QAlQC
Section 9.2 of the QAP requires that the laboratory's QAlQC Manager check the
following items in developing 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 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-specified acceptance limits, or that the case narrative
sufficiently explains any deviation from these limits. Results of this quantitative check
are provided in Tab I.
All lab QAlQC results met these specified acceptance limits except as noted below.
The QAP Section 8.1.2 requires that an MS/MSD (referred to as Duplicate Spike [Matrix
spike] in the QAP) pair be analyzed with each analytical batch. The QAP does not
specify acceptance limits for the MS/MSD pair, and the QAP does not specify that the
MS/MSD pair be prepared on DUSA samples only. Acceptance limits for MS/MSDs are
set by the laboratories. The review of the information provided by the laboratories in the
data packages verified that the QAP requirement to analyze an MS/MSD pair with each
analytical batch was met. While the QAP does not require it, the recoveries were
reviewed for compliance with the laboratory established acceptance limits. The QAP
does not require this level of review, and the results of this review are provided for
information only.
The information from the Laboratory QAIQC Summary Reports indicates that the
MS/MSDs recoveries and the associated RPDs for all quarterly chloroform samples are
within acceptable laboratory limits for all regulated compounds except as indicated in
Tab I. The recoveries which are above the laboratory established acceptance limits do not
affect the quality or usability of the data because the recoveries above the acceptance
limits are indicative of matrix interference. The QAP requirement to analyze a MS/MSD
pair with each analytical batch was met and as such the data are compliant with the QAP.
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The QAP specifies that surrogate compounds shall be employed for all organic analyses,
but the QAP does not specify acceptance limits for surrogate recoveries. The analytical
data associated with the routine quarterly sampling met the requirement specified in the
QAP. The information from the Laboratory QA/QC Summary Reports indicates that the
surrogate recoveries for all quarterly chloroform samples were within acceptable
laboratory limits for all surrogate compounds except as indicated in Tab 1. The surrogate
recoveries that were outside of acceptance limits above the upper limit or that had a high
recovery, indicate a high bias to the individual sample results. A high bias means that
reported results will tend to be more conservative or higher than actual levels. There was
one reported surrogate result which was below the lower acceptance limits. These results
indicate a potential low bias to the individual sample results only. There is no effect on
the quality or usability of the data because there are multiple surrogates added to each
sample and all other surrogates were within limits. Furthermore, there are no QAP
requirements for surrogate recoveries.
The information from the Laboratory QA/QC Summary Reports indicates that the LCS
recoveries were within acceptable laboratory limits for all LCS compounds except for
chloromethane in one analytical batch. As indicated on Tab I, the LCS recoveries were
above the upper acceptance limit and as such indicate a high bias to the sample results
associated with that LCS. A high bias to the sample results is a more conservative
approach to site assessment. It is important to note that there is no QAP requirement for
LCS recovery assessment.
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 D. The data from this tab has been
interpreted (kriged) and plotted in a water table contour map, provided under the same
tab.
Also included under Tab D is a groundwater contour map of the Mill site and a more
detailed map of a portion of the Mill site where the four chloroform pumping wells are
located, in each case with hand-drawn stream tubes, depicting hydraulic capture from the
pumpmg
The contour maps are based on the September 29,2010 data for all wells.
4.1.2 Comparison of Current Groundwater Contour Maps to Groundwater
Contour Map for Previous Quarter
The groundwater contour map for the Mill site for the second quarter of 2010, as
submitted with the Chloroform Monitoring Report for the second quarter of 2010, is
attached under Tab E.
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A comparison of the water table contour maps for the third quarter of 2010 to the water
table contour maps for the previous (second) quarter indicates similar patterns of
drawdown related to pumping of MW-4, MW-26 (TW4-15), TW4-4, TW4-19 and TW4-
20. Water levels and water level contours for the site have not changed significantly
since the last quarter, except for a few locations. Pumping at TW4-4, which began in the
first quarter of 2010, has depressed the water table near TW 4-4, but does not yet appear
to have measurably affected water levels at adjacent wells.
A reported decrease in water level of approximately 6 feet occurred in well TW 4-21.
A reported decrease in water level of approximately 26 feet occurred in pumping well
TW 4-19, and a reported increase in water level of approximately 14 feet occurred in
pumping well TW 4-4 . Water level changes at other pumping wells were less than 5 feet.
Water level fluctuations at 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 26 feet occurred in well TW 4-19 and the largest increase (decrease in
drawdown), of approximately 14 feet, occurred at TW4-4.
4.1.3 Hydrographs
Attached under Tab F are hydro graphs showing groundwater elevation in each
chloroform contaminant investigation monitor well over time.
4.1.4 Depth to Groundwater Measured and Groundwater Elevation
Attached under Tab G are tables showing depth to groundwater measured and
groundwater elevation over time for each of the wells listed in Section 2.1.1 above.
4.1.5 Evaluation of the Effectiveness of Hydraulic Capture
Perched water containing chloroform has been removed from the subsurface by pumping
MW-4, MW-26 (TW4-15), TW4-4, TW4-19, and TW4-20. The primary purpose of the
pumping is to reduce total chloroform mass in the perched zone as rapidly as is practical.
Pumping wells upgradient of TW 4-4 were chosen for pumping because 1) they are
located in areas of the perched zone having relatively high permeability and saturated
thickness, and 2) high concentrations of chloroform were detected at these locations. The
relatively high transmissivity of the perched zone in the vicinity of these pumping wells
results in the wells having a relatively high productivity. The combination of relatively
high productivity and high chloroform concentrations allows a high rate of chloroform
mass removal. TW 4-4 is located in a downgradient area having relatively high
chloroform concentrations but relatively small saturated thickness, and at a transition
from relatively high to relatively low permeability conditions downgradient of TW 4-4 as
indicated by hydraulic testing of TW4-4, TW4-6, and TW4-26 during the third quarter.
Pumping TW 4-4 helps to reduce the rate of chloroform migration in this downgradient
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portion of the plume and to mitigate the increase III chloroform concentrations
downgradient of TW4-4 (for example, at TW4-6).
The impact of pumping is indicated by the water level contour maps attached under Tabs
D and E. Cones of depression have developed in the vicinity of MW-4, MW-26 (TW4-
15), TW4-19, and TW4-20 which continue to remove significant quantities of chloroform
from the perched zone. The water level contour maps indicate that effective capture of
water containing high chloroform concentrations in the vicinity of these pumping wells is
occurring. Overall, the combined capture of MW-4, MW-26 (TW4-15), TW4-19, and
TW4-20 has not changed significantly since the last quarter. As noted in Section 4.1.2, a
decrease in water level (increase in drawdown) of approximately 26 feet occurred at
TW4-19, and an increase in water level (decrease in drawdown) of approximately14 feet
occurred at TW4-4. The increase in drawdown at TW4-19 has increased the apparent
capture zone of this well relative to other nearby pumping wells. TW 4-4 has apparently
not been pumped long enough for a well-defined capture zone to develop.
Chloroform concentrations exceeding 70 f.1g/L exist at some locations downgradient of
pumping wells (for example, at TW4-6, located immediately downgradient of TW4-4),
where the lower permeability and relatively small saturated thickness of the perched zone
significantly limits the rate at which chloroform mass can be removed by pumping. By
removing mass and reducing hydraulic gradients, thereby reducing the rate of
downgradient chloroform migration, and allowing natural attenuation to be more
effective, pumping at the productive, up gradient locations has a beneficial effect on this
downgradient chloroform. Pumping at TW 4-4 was implemented during the first quarter
of2010 to improve capture in this downgradient area to the extent allowable by the lower
productivity conditions presumed to exist in this area.
4.2 Review of Analytical Results
4.2.1 Current Chloroform Isoconcentration Map
Included under Tab J of this Report is a current chloroform isoconcentration map for the
Mill site.
4.2.2 Chloroform Concentration Trend Data and Graphs
Attached under Tab K is a table summarizing values for all required parameters, chloride,
nitrate/nitrite, carbon tetrachloride, chloroform, chloromethane, and methylene chloride,
for each well over time.
Attached under Tab L are graphs showing chloroform concentration trends III each
monitor well over time.
4.2.3 Interpretation of Analytical Data
Comparing the analytical results to those of the previous (second) quarter, as summarized
in the table included under Tab K, the following observations can be made:
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a) Chloroform concentrations have increased by more than 20% in the following
wells compared to last quarter: TW4-7 and TW4-21;
b) Chloroform concentrations have decreased by more than 20% in the following
wells compared to last quarter: TW4-10, TW4-22, and new well TW4-26;
c) Chloroform concentrations have remained within 20% in the following wells
compared to last quarter: MW-4. TW4-1, TW4-2, TW4-4, TW4-5, TW4-6,
TW4-11, TW4-15, TW4-18, TW4-19, TW4-20, and TW4-24;
d) TW4-3, TW4-8, TW4-9, TW4-12, TW4-13, TW4-14, TW4-16, TW4-23, and
TW4-25 remained non-detect; and
e) MW-32 (TW4-17) increased from non-detect to 4.3 Ilg/L.
As indicated, third quarter chloroform concentrations at most wells were within 20% of
the values reported for the wells during the second quarter, suggesting that variations are
within the range typical for sampling and analytical error. Wells TW 4-7, TW 4-10, TW 4-
21, and TW4-22, which had changes in concentration greater than 20%, are located
adjacent to pumping wells MW-4, MW-26 (TW4-15), TW4-19, and TW4-20,
respectively. Fluctuations in concentrations at these wells likely result in part from
changes in pumping at the adjacent wells.
Pumping well TW4-20 had the highest detected chloroform concentration. Since the last
quarter, the chloroform concentration in TW4-20 decreased from 18,000 Ilg/L to 15,000
Ilg/L, the concentration in adjacent pumping well TW4-19 increased from 1,800 Ilg/L to
2,000 Ilg/L, the concentration in nearby well TW4-21 increased from 210 to 390 Ilg/L,
and the concentration in nearby well TW4-22 decreased from 540 Ilg/L to 340 Ilg/L.
Wells TW4-23 and TW4-25 remained non-detect for chloroform, and the concentration
in well TW4-24 increased slightly from 1.7 Ilg/L to 1.8 Ilg/L. TW4-24, located west of
TW4-22, and TW4-25, located north ofTW4-21, bound the chloroform plume to the west
and north.
The chloroform concentration in TW4-6 increased from 590 Ilg/L to 630 Ilg/L. TW4-6,
installed in the second quarter of 2000, was the most downgradient temporary perched
well prior to installation of temporary well TW4-23 in 2007 and temporary well TW4-26
in the second quarter of 2010, and remained outside the chloroform plume until the first
quarter of 2009. TW4-6 likely remained outside the chloroform plume between the time
of installation and the fourth quarter of 2008 due to a combination of 1) slow rates of
downgradient chloroform migration in this area due to low permeability conditions and
the effects of upgradient chloroform removal by pumping, and 2) natural attenuation.
TW4-23 and new well TW4-26 (with a chloroform concentration of 5.2 Ilg/L) bound the
chloroform plume to the south.
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The slow rate of chloroform migration in the vicinity of TW 4-6 is demonstrated by
comparing the rate of increase in chloroform at this well to the rate of increase in the
nearest up gradient well TW4-4. Concentrations at TW4-4 increased from non-detect to
more than 2,200 !lg/L within only 2 quarters whereas 16 quarters were required for
concentrations in TW4-6 to increase from non-detect to only 81 !lg/L. This behavior is
consistent with hydraulic tests performed at TW4-4, TW4-6, and TW4-26 during the
third quarter of 2010 that indicate a nearly two order of magnitude decrease in
permeability downgradient of TW4-4. Chloroform migration rates in the vicinity of new
well TW4-26 are also expected to be relatively low due to upgradient pumping and low
permeability conditions.
Wells MW-32 (TW4-17) and TW4-26 are located immediately downgradient of the
chloroform plume. The concentration in MW-32 (TW4-17) increased from non-detect to
4.3 !lg/L, and the concentration in TW4-26 decreased from 13 !lg/L to 5.2 !lg/L. Slight
expansion and contraction of the chloroform plume boundaries in response to changes in
upgradient pumping are expected to impact the concentrations at these wells.
Furthermore, because TW4-26 was installed in May 2010, some of the fluctuation in
concentration may result from lack of stabilization.
5.0 LONG TERM PUMP TEST AT MW-4, TW4-15 (MW-26), TW4-19, TW4-
20, AND TW4-4 OPERATIONS REPORT
5.1 Introduction
As a part of the investigation of chloroform contamination at the Mill site, DUSA has
been conducting a Long Term Pump Test on MW-4, TW4-19, TW4-15 (MW-26) and
TW4-20, and, since January 31,2010, TW4-4. The purpose of the test is to serve as an
interim action that will remove a significant amount of chloroform-contaminated water
while gathering additional data on hydraulic properties in the area of investigation. The
following information documents the operational activities during the quarter.
5.2 Pump Test Data Collection
The long term pump test for MW-4 was started on April 14, 2003, followed by the start
of pumping from TW4-19 on April 30, 2003, from TW4-15 (MW-26) on August 8, 2003,
from TW4-20 on August 4,2005, and from TW4-4 on January 31,2010. Personnel from
Hydro Geo Chern, Inc. were on site to conduct the first phase of the pump test and collect
the initial two days of monitoring data for MW-4. DUSA personnel have gathered
subsequent water level and pumping data.
Analyses of hydraulic parameters and discussions of perched zone hydrogeology near
MW-4 has been provided by Hydro Geo Chern in a separate report, dated November 12,
2001, and in the May 26,2004 Final Report on the Long Term Pumping Test.
Data collected during the quarter included the following:
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• Measurement of water levels at MW-4, TW4-19, TW4-15 (MW-26), and
TW4-20 and, commencing regularly on March 1, 2020, TW4-4, on a
weekly basis, and at selected temporary wells and permanent monitoring
wells on a monthly basis.
• Measurement of pumping history, including:
pumping rates
total pumped volume
operational and non-operational periods.
• Periodic sampling of pumped water for chloroform and nitrate/nitrite
analysis and other constituents.
5.3 Water Level Measurements
Beginning August 16, 2003, the frequency of water level measurements from MW-4,
TW4-15 (MW-26), and TW4-19 was reduced to weekly. From commencement of
pumping TW4-20, and regularly after March 1, 2010 for TW4-4, water levels in these
wells have been measured weekly. Depth to groundwater in all other chloroform
contaminant investigation wells is monitored monthly. Copies of the weekly Depth to
Water monitoring sheets for MW-4, TW4-15 (MW-26), TW4-19, TW4-20 and TW4-4
and the July and August monthly Depth to Water monitoring sheets for all of the
chloroform contaminant investigation wells are included under Tab C. Monthly depth to
water measurements for September are recorded in the Field Data Worksheets included
under Tab B.
5.4 Pumping Rates and Volumes
Table 2 summarizes the recovered mass of chloroform by well per quarter and
historically since the inception of the chloroform recovery program for the five currently-
active pumping wells.
5.4.1 MW-4
Approximately 79,859 gallons of water were pumped from MW-4 during the quarter.
The average pumping rate from MW-4, when the pump was pumping, was approximately
4.3 gpm throughout the quarter. The well is not pumping continuously, but is on a delay
device. The well purges for a set amount of time and then shuts off to allow the well to
recharge. Water from MW-4 was transferred to the Cell 1 evaporation pond through a
pipeline installed specifically for that purpose. During the week of July 13, 2010, flow
measurements were not collected and the well did not pump as the power to the well was
disrupted due to the hydrogeologic testing of TW 4-4. Power on the circuit was disrupted
which affected TW4-4 as well as MW-4.
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5.4.2 TW 4-19
Approximately 116,899 gallons of water were pumped from TW4-19 during the quarter.
The average pumping rate from TW 4-19, when the pump was pumping, was
approximately 5.1 gpm throughout the quarter. The pump in this well is operating on a
delay. It pumps for approximately one and a half minutes and then is off for two to three
minutes. Water from TW4-19 was directly transferred to the Cell 1 evaporation pond
through a pipeline installed specifically for that purpose. The weeks of August 23, and
August 30, 2010 pump problems were noted in this well. In both instances the well was
not properly pumping. The pump was replaced by the time of the next measurement on
September 7,2010 to address the problems.
5.4.3 TW4-15 (MW-26)
Approximately 63,850 gallons of water were pumped from TW4-15 (MW-26) during the
quarter. The average flow rate from TW4-15, when the pump was pumping, was
approximately 5.2 gpm throughout the quarter. The well is not pumping continuously,
but is on a delay device. The well now purges for a set amount of time and then shuts off
to allow the well to recharge. The water is directly transferred to the Cell 1 evaporation
pond through a pipeline installed specifically for that purpose.
5.4.4 TW 4-20
Approximately 39,098 gallons of water were pumped from TW4-20 during the quarter.
The average flow rate from TW4-20, when the pump was pumping, was approximately
1.9 gpm throughout the quarter. The well is not purging continuously but is on a delay
device. The well pump is set on a water elevation device. When the water reaches a set
point, the pump turns on until the water level drops to another set point. The water is
directly transferred to the Cell 1 evaporation pond through a pipeline installed
specifically for that purpose.
5.4.5 TW4-4
Approximately 76,916 gallons were pumped from TW4-4 during the quarter. The
average flow rate, when the pump was pumping, was 8.5 gpm. The well is not pumping
continuously, but is set on a water elevation device. When the water reaches a set point,
the pump turns on until the water level drops to another set point. The water is directly
transferred to the Cell 1 evaporation pond through a pipeline installed specifically for that
purpose. During the week of July 13, 2010, flow measurements were not collected and
the well did not pump as the power to the well was disrupted due to the hydrogeologic
testing of this well. Power on the circuit was disrupted which affected TW 4-4 as well as
MW-4.
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5.5 Mass Removed
Chloroform removal was estimated as of the first quarter 2007. Since that estimation the
mass removed by well for each quarter has been compiled in Table 2 below, indicating
that a total of 511.5 pounds of chloroform have been removed to date.
5.6 Inspections
Denison has submitted an Operations and Maintenance Plan, Chloroform Pumping
System, White Mesa Mill, Blanding, Utah, Revision 2.1 to UDEQ for approval. Upon
approval of that plan, the Mill will commence documenting its required inspections of the
operational status of the chloroform pumping wells on an inspection form. An example
of the form as well as completed reports for the quarter will be included in future
Chloroform reports upon approval by UDEQ. At the time ofthe publication of this report
approval of the Operations and Maintenance Plan, Chloroform Pumping System, White
Mesa Mill, Blanding, Utah, Revision 2.1 had not been received.
Operational problems in the pumping wells are summarized above.
5.7 Conditions That May Affect Water Levels in Piezometers
No significant amount of water was added to any of the three wildlife diversion ponds
during the quarter.
6.0 CORRECTIVE ACTION REPORT
Necessary corrective actions identified during the current monitoring period are described
below.
6.1 Rinsate Sample Chloroform and Nitrate Levels
Identification and Definition of the Problem
Rinsate Chloroform and Nitrate Levels
Chloroform
Chloroform has been present in the rinsate blanks in previous quarters and an
investigation has been ongoing. Based on the results of the investigation DUSA believes
that the potential source for the chloroform present in the rinsate blanks has been
identified. Review of the chloroform detections has shown that there is no correlation
between the rinsate blank concentrations and the sample concentrations in the wells
associated with the rinsate blanks (Chloroform Monitoring Report 2nd Quarter 2010,
August 30, 2010). The chloroform present in the rinsate blanks is most likely present in
the DI water and is not the result of inadequate decontamination of the purging pump.
The chloroform contamination in the DI water is most likely the result of chlorination of
the intake water used for the DI system.
21
N:lRequired ReportslChloroform Quarterly Monitoring Report120 10 Q31201 0_ Q3 _ Chloroform_Report_tcx1.doc
Nitrate
DI water used for decontamination does not show the presence of nitrate. Contamination
does not appear to be related to the nitrate presence in the preceding well that was
purged. Rinsate samples following high concentration wells appear to be the same as
rinsate samples following low concentration wells. Rinsate samples following purging of
uncontaminated wells appear to also be contaminated with nitrate. Presence of nitrate in
the rinsate samples is not consistent from one sampling event to the next.
Assignment of Responsibility for Investigation of the Problem
The problem is currently under investigation by the QA Manager.
Investigation and Determination of Cause of the Problem
Rinsate Sample Chloroform and Nitrate Levels
The QA Manager plans to implement a testing program to confirm the source(s) which
are introducing chloroform into the sampling andlor rinsate process. As discussed above,
and based on evaluations to date, chloroform is most likely entering the rinsate blanks
from the chlorination process. The DI system is showing signs of breakthrough at times
of high usage.
To address the nitrate contamination, DUSA will continue investigating additional
conditions which may be causing the nitrate contamination by mobilizing nitrogen
compounds present in nitrile gloves (such as leaching from the gloves by the nitric acid).
In addition, DUSA has requested in the revised QAP, submitted June 4, 2010, the
removal of the nitric acid rinse step when samples are not collected for heavy metals,
which will effectively remove the source of nitrate. DUSA will proceed with the removal
of that step only upon approval of the QAP revision.
Determination of a Corrective Action to Eliminate the Problem
Rinsate Sample Chloroform and Nitrate Levels
During the fourth quarter chloroform sampling event UDEQ personnel were present and
observed the rinsate blank collection procedures. UDEQ personnel provided
recommended changes, which include the reduction of rinsate blanks to once daily and
the daily reuse of soap/nitric acid decontamination fluids. These changes will reduce
significantly the amount ofDI water needed to implement the sampling program. The
reduction in DI water usage will reduce the "load" on the DI system and eliminate the
breakthrough of chloroform. This change was implemented during the fourth quarter
chloroform sampling program. The QA Manager has completed a preliminary review of
the fourth quarter data and, based on the data received to date, the changes in the
decontamination program have reduced the chloroform contamination in the DI system.
22
N:lRequired ReportslChloroform Quarterly Monitoring Report1201 0 Q31201 0_ Q3 _ Chloroform_Report _text doc
A proposed QAP revision will be prepared to address the changes to the decontamination
procedures and the frequency of rinsate blank sample collection.
The nitrate source is most likely the nitric acid rinse used during decontamination
procedures, however, additional conditions which may be contributing to the nitrate
detections in the rinsate blanks are being investigated. The additional items for
investigation include the leachability of nitrogen ions from nitrile gloves and the
decontaminationlrinsate procedure itself.
Assigning and Accepting Responsibility for Implementing the Corrective Action
Rinsate Chloroform and Nitrate Levels
It will be the joint responsibility of the Director, Compliance and Permitting, and the
Mill's sampling staff to implement the changes and to assess the data to determine if it
has corrected the problems.
Implementing the Corrective Action and Evaluating Effectiveness
Rinsate Chloroform and Nitrate Levels
Implementation to verify the chloroform source(s) was started in previous quarters.
Systematic review of the issue has been ongoing and has been completed. DUSA
believes the source has been identified and that changes suggested by DRC will address
the sources identified. Data collected during the fourth quarter (and possibly other future
quarters) will be reviewed to determine if additional engineering options need to be
considered. Nitrate sources will be removed after the removal of the nitric acid rinse
from the decontamination procedure when heavy metals are not collected (assuming
requisite changes to the QAP submitted June 4, 2010 are approved by the Executive
Secretary). Additive effects from the decontaminationlrinsate procedure and the
contribution from the use of nitrile gloves in the presence of nitric acid are being
investigated to determine additional factors which may be increasing nitrate
contamination.
Verifying That the Corrective Action Has Eliminated the Problem
Verification that chloroform contamination has been eliminated will occur upon receipt
of at least the fourth quarter 2010 data. Additional data collection may be required and
will be discussed in the fourth quarter 2010 report. Verification of nitric acid as the
source of the nitrate contamination cannot be completed until the Executive Secretary
approval of the June 4,2010 QAP revision is received.
6.2 Assessment of Previous Quarter's Corrective Actions
The third quarter 2010 report identified three corrective actions, which are: turbidity
measurements which exceeded the 10% RPD requirement; depth to water measurements
23
N:lRequired Reports\Chloroform Quarterly Monitoring Report12010 Q31201 0_ Q3 _Chloroform_Report _text. doc
not being consistently recorded; and chloroform and nitrate contamination in the rinsate
blanks.
Chloroform and nitrate contamination in the rinsate blanks is discussed above in Section
6.1.
The consistent recording of depth to water measurements has been corrected, and there
are no deviations noted during this sampling program for the third quarter 2010. As such
the corrective action is considered appropriate and complete as evidenced by the field
data sheets included as Tab B to this report.
Turbidity corrective actions are ongoing with the monitoring well redevelopment
program at the Mill. The data collected during the redevelopment program will be
presented to UDEQ under separate cover and discussed to determine the resolution of the
turbidity issues discussed in the UDEQ letters dated June 1,2010 and June 24,2010.
7.0 CONCLUSIONS AND RECOMMENDATIONS
The water level contour maps for the third quarter, 2010 indicate that effective capture of
water containing high chloroform concentrations in the vicinity of pumping wells MW -4,
MW-26 (TW4-15), TW4-19, and TW4-20 is occurring. TW4-4 has apparently not been
pumped long enough for a well-defined capture zone to develop in the vicinity of this
well.
Third quarter chloroform concentrations at most wells were within 20% of the values
reported for the wells during the second quarter, suggesting that variations are within the
range typical for sampling and analytical error. Changes in concentration greater than
20% occurred in wells TW4-7, TW4-10, TW4-21, TW4-22, and new well TW4-26; the
concentration in well MW-26 (TW4-17) increased from non-detect to 4.3 flg/L.
Fluctuations in concentrations at wells TW4-7, TW4-10, TW4-21, TW4-22 likely result
in part from changes in pumping at adjacent wells MW-4, MW-26 (TW4-15), TW4-19,
and TW4-20, respectively. Fluctuations in concentrations at wells MW-32 (TW4-17) and
TW4-26, each located immediately downgradient of the chloroform plume, likely result
from slight expansion and contraction of the chloroform plume boundaries in response to
changes in upgradient pumping. Furthermore, because TW4-26 was installed in May
2010, some of the fluctuation in concentration may result from lack of stabilization.
Between the second and third quarters, the concentration in TW4-26, which is the most
downgradient temporary well, decreased from 13 flg/L to 5.2 flg/L.
The highest chloroform concentration was detected at pumping well TW4-20. Between
the second and third quarters of 2010, the chloroform concentration in TW4-20
decreased from 18,000 flg/L to 15,000 flg/L, the concentration in adjacent pumping well
TW 4-19 increased from 1,800 flg/L to 2,000 flg/L, the concentration in nearby well
TW4-21 increased from 210 to 390 flg/L, and the concentration in nearby well TW4-22
decreased from 540 flg/L to 340 flg/L. Fluctuations in concentrations in these wells are
likely related to their location near the suspected former office leach field source area in
24
N:lRequired ReportslChloroform Quarterly Monitoring Report120 I 0 Q3120 10_ Q3 _Chloroform _ Report_text.doc
addition to variations in pumping in TW4-20 and nearby wells. Regardless of these
measured fluctuations in chloroform concentrations, sampling of temporary wells TW 4-
24 (located west of TW4-22) and TW4-25 (located north of TW4-21), indicates these
wells remain outside the chloroform plume and thus bound the plume to the west and
north. Chloroform was not detected at TW4-25, and was detected at a concentration of
1.8 ~g/L at TW4-24.
The chloroform concentration at well TW4-6 increased from 590 to 630 ~g/L. TW4-6,
which remained outside the plume until the first quarter of 2009, is located within the
southernmost portion of the plume. Although fluctuations in concentrations have
occurred, this well likely remained outside the chloroform plume between installation in
the second quarter of 2000 and the fourth quarter of 2008 due to a combination of 1) slow
rates of downgradient chloroform migration in this area due to low permeability
conditions and the effects of up gradient chloroform removal by pumping, and 2) natural
attenuation. Chloroform remained non-detect at downgradient temporary well TW4-23.
TW4-23 and new well TW4-26 (with a chloroform concentration of 5.2 ~g/L) bound the
chloroform plume to the south.
Continued pumping of MW-4, MW-26 (TW4-15), TW4-19, and TW4-20 is
recommended. Pumping these wells, regardless of any short term fluctuations in
concentrations detected at the wells (such as at TW4-20), helps to reduce downgradient
chloroform migration by removing chloroform mass and reducing average hydraulic
gradients, thereby allowing natural attenuation to be more effective. Continued pumping
at TW 4-4 is also recommended to improve capture of chloroform to the extent practical
in the southern portion of the plume where low permeability conditions exist.
8.0 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 chloroform contaminant
investigation during the quarter, in Comma Separated Values (CSV) format. A copy of
the transmittal e-mail is included under Tab M.
25
N:lRequired ReportslChloroform Quarterly Monitoring Report1201 0 Q312010_Q3_Chloroform_Report_texLdoc
9.0 SIGNATURE AND CERTIFICATION
This document was prepared by Denison Mines (USA) Corp. 011 November 24,2010.
DENISON MINES (USA) CORP.
By:
Da d . Fr denlund
Vice President, Regulatory Affairs and Counsel
26
N,IRoquir«i ROJ>ort.\ChJemfonll Q".rt",Jy Monitoring Roport12010 Q312010_Q3_C,'hlofQfonn)«:"on_I<>tI,doc
Certification:
I certify, under penalty of law, that this document and all attachments were
prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted.
Based on my inquiry of the person or persons who manage the system, or those persons
directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. I am aware that there are
significant pe ties for submitting false information, including the possibility of fine and
en for knowing violations.
Da
Vice President, Regulatory Affairs and Counsel
Denison Mines (USA) Corp.
27
N:\Required ReportslChloroform Quarterly Monitoring Report120l 0 Q312010 _ Q3 _Chloroform _Report_text doc
Tables
Table 1: Summary of Well Sampling for the Period
Well Sample Date Date of Lab Report
MW-4 8/16/2010 9/8/2010*
TW4-1 8/24/2010 9/8/2010*
TW4-1R 8/23/2010 9/8/2010*
TW4-2 8118/2010 9/8/2010*
TW4-2R 8/1712010 9/8/2010*
TW4-3 8/10/2010 9/312010
TW4-3R 8/9/2010 9/3/2010
TW4-4 8116/2010 9/812010*
TW4-5 8/1112010 9/3/2010
TW4-5R 8110/2010 9/3/2010
TW4-6 8112/2010 9/312010
TW4-6R 811112010 9/3/2010
TW4-7 8/18/2010 9/812010*
TW4-7R 8117/2010 9/8/2010*
TW4-8 811112010 9/3/2010
TW4-8R 8/10/2010 9/3/2010
TW4-9 811112010 9/3/2010
TW4-9R 8110/2010 9/3/2010
TW4-10 8/12/2010 9/3/2010
TW4-10R 811112010 9/3/2010
TW4-11 8/12/2010 9/3/2010
TW4-IIR 8/1112010 9/3/2010
TW4-12 8110/2010 9/8/2010
TW4-12R 8/9/2010 9/8/2010
TW4-13 8/10/2010 9/8/2010
TW4-13R 8/9/2010 9/3/2010
TW4-14 8/10/2010 9/312010
TW4-14R 8/9/2010 9/3/2010
TW4-15 8/16/2010 9/8/2010*
TW4-16 8/24/2010 9/17/2010
TW4-16R 8/23/2010 9/17/2010
TW4-17 8/16/2010 9/8/2010*
TW4-18 8112/2010 9/3/2010
TW4-18R 811112010 9/3/2010
TW4-19 8/16/2010 9/8/2010*
TW4-20 8/16/2010 9/8/2010*
TW4-21 8112/2010 9/3/2010
TW4-21R 8/1112010 9/3/2010
TW4-22 8124/2010 9/17/2010
TW4-22R 8/2312010 9117/2010
TW4-23 8/10/2010 9/312010
TW4-23R 8/9/2010 9/3/2010
TW4-24 8/24/2010 9117/2010
TW4-24R 8/23/2010 9/17/2010
TW4-25 8/10/2010 9/312010
TW4-25R 8/9/2010 9/3/2010
TW4-26 8/11/2010 9/3/2010
TW4-26R 8110/2010 9/3/2010
TW4-60 8117/2010 9/8/2010*
TW4-65 8/12/2010 9/3/2010
TW4-70 8116/2010 9/8/2010*
AI! sample locations were sampled for Carbon Tetrachloride, Chloromethane, Methylene Chloride, Chloride and
Nitrogen
"R" following a well number deisgnatcs a rins.te sample collected prior to purging of the well of that number.
TW4-60 is. DI Field Blank, TW4-65 is a duplicate of TW4-21, and TW4-70 is a duplicate ofTW4-J7.
* Data were reported 9/8/2010. A revised report was submitted 1012212010.
Highlighted wells are continuously pumped.
Table 2 Chloroform Mass Removal Per Well Per Quarter
Quarter MW-4 MW4-15 MW4-19 MW4-20 TW4-4 Quarter Totals
Q12007 36.8 12.9 150.2 87.0 NA 286.9
Q22007 1.4 0.1 0.0 2.5 NA 4.0
Q32007 2.2 0.8 2.9 3.1 NA 9.0
Q42007 l.7 1.0 3.1 4.8 NA 10.6
Q12008 l.7 0.4 4.6 7.2 NA l3.8
Q22008 1.3 0.5 3.2 9.9 NA 14.8
Q32008 1.2 0.3 15.9 9.3 NA 26.8
Q42008 1.3 0.3 20.7 0.4 NA 22.7
Q12009 1.7 0.4 4.3 3.6 NA 10.0
Q22009 6.8 0.2 3.7 2.8 NA l3.5
Q32009 1.5 0.4 ILl 5.5 NA 18.5
Q42009 4.8 0.6 17.8 26.1 NA 49.4
Q12010 0.9 0.4 2.7 0.4 NA 4.5
Q22010 1.5 1.0 6.8 5.9 1.4 16.5
Q32010 1.3 1.2 2.0 4.9 1.3 10.6
Well Totals (pounds) 66.0 20.5 248.9 173.4 2.8 511.5
INDEX OF TABS
Tab A Site Plan and Perched Well Locations White Mesa Site
Tab BOrder of Sampling and Field Data Worksheets
Tab C Weekly and Monthly Depth to Water Data
Tab D Kriged Current Quarter Groundwater Contour Map, Capture Zone Map, Capture Zone Details
Map, and Depth to Water Data
Tab E Kriged Previous Quarter Groundwater Contour Map
Tab F Hydrographs of Groundwater Elevations Over Time for Chloroform Monitoring Wells
Tab G Depths to Groundwater and Elevations Over Time for Chloroform Monitoring Wells
Tab H Laboratory Analytical Reports
Tab I Quality Assurance and Data Validation Tables
1-1 Field Data QNQC Evaluation
1-2 Holding Time Evaluation
1-3 Receipt Temperature Check
1-4 Analytical Method Check
1-5 Reporting Limit Evaluation
1-6 Trip Blank Evaluation
1-7 QNQC Evaluation for Sample Duplicates
1-8 QC Control Limits for Analyses and Blanks
1-9 Rinsate Check
Tab J Kriged Current Quarter Chloroform Isoconcentration Map
Tab K Analyte Concentration Data Over Time
Tab L Chloroform Concentration Trend Graphs
Tab M CSV Transmittal Letter
Tab N Disinfection Byproducts -Trihalomethanes
Tab A
Site Plan and Perched Well Locations White Mesa Site
;{
1/ ,I
II
II I ~{I
II
II
II
II
9-~
II
11 32 II
II
II
II
II
II
II
II
II
II
\ • tA-21
\\
\\
N
\1
\\
~ ~ ~ ~ ~
PROPERTY
BOUNDARY
II
II
II
II
II
II
II
MW-Q1 •
MW-18 •
~-5
~ TWN-6
~ TWN-8
~ TWN-15
~ TWN-10
~
TWN-9
PIEZ-1 ..
MW-19
~ TWN-11
~ TWN-14
~
'l •
MW-02 •
111 II
(( -..:::-.
MW-85 ~I
I
~ /; MW-33 __ MW-34 M~. ~ ~--.
~
MW-Q3 •
MW-20 •
~'---=-~~--=--=--~~~
CELL NO.1
CELL NO.2
MW-17 •
~ TWN-7
I I
33
~
TWN-18
~ -TWN-3 PIEZ-2 .. " ~ TW'~ JN4 .,
MILL §ITE~ PIEZ-3
'=" #tv TWN-.. o 4-21
MW-26 TW4_1cPTW4-9
o OTW4-3 OTW4-12
'OTW4-1IbTW4-11 OTW4-13
TW4-7~-8
OTW4-1
OTW4-40TW4_14
TW4-23 OTW4-6 o
PIEZ-4 ..
* PIEZ-5 ..
~TW4-26
,&k .=:::--=--=-- -£/ ---
£;::::7
7
T37S
T38S
f~
1/ ~~~~~-=-4--=--=--=--=--=--=--=--=--=--=--=-7! ~~ 4' Af--lJ "'--::::-
\
\
~ ~ c
(
~
"
L ___ ~~_~-__ -=-_______ c======--, MW-22 • II
//
// 0
SCALE IN FEET
I;XPLAHAIIQN MW-20 • perched monitoring well
TW4-19
0 temporary perched monitoring well
PIEZ-1 perched piezometer " TWN-1 temporary perched nitrate ~ monitoring well
TW4-26 temporary perched monitoring well ~ installed May, 2010
MW-34 perched monitoring well installed -Q-August/September, 2010
3000
f wildlife pond
HYDRO
GEO
CHEM, INC. APPROVED
SJS
//
//
//
//
//
//
//
//
SITE PLAN
AND PERCHED WELL LOCATIONS
WHITE MESA SITE
DATE REFERENCE I FIGURE
H:n18000/nov1 0/welloc1 O.srf
TabB
Order of Sampling and Field Data Worksheets
Order of Contamination for 3rd Quarter 2010 Chlorofonn Purging Event
Chloroform Water Well
Well Sample time Levels Rinsate date/time level Depth
TW4-3 •• 10 ..... 0 o~7 ND ,.q.'D CIIfIIIO 06'\\ 97
TW4-12 V.IO'''. o7't" ND f,..c.\ -Ie D~ 101.5
TW4-13 "".aolo 0:!J' NO ~-~ -10 \~ 102.5
TW4-14 i-1G-Jpp (W)(,. NO 8A·/6 1,,;1,,' 93
, TW 4-17 8-1;-,010 IS~ ND 130 Bladder pump
TW 4-23 ~ 10'~O CE.I.\O ND ~ -~ -\0 l~~ 114
TW4-25 1-10-)610 O~OT ND ~ -\ -It) ''IH 134.8
TW4,.8 ftAII-~II>'/) ~,'U NO is, I() -\~ Ol>UlJ 125
TW4-9 a-II .,.,. oc.!2.. ND ~ -ID ~ 10 o~1 120
TW4-24 c.'\~ ~~ 1.7 (, .10.10 ,0'8 112.5
TW4-16 .-11.)1110 0"1'-1 2.1 c· ,Chi!) nCl() 142
TW4-5 !:"·~tO ~"\"1 12 c. \0.10 1)50 120
TW~26 t.II.)Dto 0"101:\ 13 '-Ib ·10 ''il~ 86 -TW 4-18 s-a..a-oDD 29 c·' •. 10 01S) 137.5 Ibm" ...
TW4-21 Nl.~ 0"'0 210 S." M\O 01S"\'!» 121
TW 4-10 '.!l~O 0151 220 t-Il -10 ()I\'b 113
TW 4-22 8-11.2/40 ·'jl 540 a-u • 10 ID I'{ 113 .5
TW4-6 ,.o,)bI() Qtf01 590 s .. n-16 lOSe. 97.5
TW 4-11 IHl.~ u(a 820 1-11 -10 I~l 100
.. TW4-7 t·II,-;lo1D Ot,11 1100'-11-,0 oS" 120
.-TW4-1 V·II·)DID 0,'1 1600 1-11 -10 0'1» 110
I' TW 4-19 8-lLeaO)!) MS' 1800 125 Cont. Pumping
. TW4-15 ~~'I~~ [~l5 1900 122.5 Cont. Pumping
'TW4-4 {totfa .,a0lb fO~ 2000 112 Cont. Pumping
,.MW4 t·." -).0111 .t.2' 2100 124 Cont. Pumping
< TW4-2 a ·1' ·,.011 0.11 3300'''1'.)010 I~b~ 120
, TW4-20 '~.2D1O I~ 18000 106 Cont. Pumping
TW4-60 D.1. Blank &-\1~O «'('50
TW4-65 Duplicate 1S -1;1.. . .toiO Q730
TW4-70 Duplicate 8·" -,010 I!'tO
Comments:
...
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ma.DDATA WO .... -MGlOONDWATIR
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-r1M'~. _ .... 10 ......... 1( _____ • ,.,...1,. _. _,I.IoIQ~,O~~ ____ _
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QaIfit1 ~ftIa(QAI? ,."lof41
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V..,crf1V_,....,..,...r •• W161~ ....
• • \-' ~'~. ; ':'rlO,'.
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Weekly and Monthly Depth to Water Data
Depth to Water
Date 7-S .. 'JOID mmHg 6/Z. S"S'
TI me WII e o th ep~ c t ommen s
)405 MW-4 7'3.SS Flow 'J. .7 6-P ""
Meter ''13~g6'~
IL\D\ TW4-15 14.07 Flow 5. b &PM.
Meter 3550"\.D
JL\"3C TW4-19 6"1. I G Flow 2 .. 0 ~"A
Meter I '-I SqSl. ~ ~
1~~1 TW4-20 64.11 Flow I. g ("pJ/\
Meter ~ 1 J. J q.)1t;
\'i to TW4-4 7S.Jb Flow ~~~ erPM
Meter I;lDJ:,b"t.b
Water: 64'\l5r
(
Depth to Water
Date 7· /3 '2/J/d mmHg ~;.O( 16 K
1 i W II D th C t me e eD1 ommen s
IAAb MW-4 t,:J. '1iJ Flow*"
Meter 11'f'1SfI..5
!Jq~ TW4-15 ~:J·5;J.. Flow '1.7-_f:trlM...
J.LJI. .. _ u/) Meter:J(' tJ'J ~ , I
I~/~ TW4-19 t/, .51 Flow 1 f £dI!1
Meter I !l!KJJLLl
~'1Sq TW4-20 ~5 'II Flow /. 7_~LIJ1
Meter 7..23 '.7 J
I~IJJI TW4-4 t,t, S"1 Flow *
Meter 177 () ~5". t,
~ I/Iv "-_" 'I a .-A fNAt1 /J_lt~ ~ kr Itk~~ ..s:, L .L L Itt
fU'/IM' ~""" ~/.!.~ -r; ,rr 4N ~~_ f{,~d ~ ~
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I I I
Water: t.. 71./221 7-/.2 ·10
'" r
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Chloroform Wells
Date 7-15-20iO mmHg ~lL\.Q7g
Time Well Degth Comments
1m MW-4 ".'1
,~ TW4-1 6I~.1a
J~'1 TW4-2 ".If"
~18 TW4-3 !:l1·,1
I:z.n TW4-4 ' •• c.o
I!l.~ TW4-5 l~~
la~ TW4-6 7~·q,
12:l3 TW4-7 '!I.'~ ,uo TW4-8 ",.71.
~, TW4-9 5~.,~
Ill~ TW4-10 SSAI
I~' TW4-11 51.3(.
11~ TW4-12 31.~&4
g,'i&I TW4-13 ~·"Il
Il~C. TW4-14 11."\
e.G. TW4-15 JII~~
l2S(. TW4-16 '''.41
~'t TW4-17 1'.c.s
llQ\ TW4-18 5b21
1510 TW4-19 '" .Iet
~I TW4-20 lS.51
"-D':\ TW4-21 ~b.3~
11Q9 TW4-22 S~."
'~I TW4-23 ".Q.
1201 TW4-24 S(..~
1159 lW4-25 ~S.~
1:131 TW4-26 '''·1'
Date 7' 'Z o· 10
Ti W II me e
I~Sb MW-4
11s-1 TW4-15
150], TW4-19
jtJ ~?-TW4-20
TW4-4
Water:
Depth to Water
mmHg 6 tl. 55';
D th C ep, t ommen s
7lj.3 1 Flow '1 . .3 bl'fYt
Meter 2 0 2 (j.:r ZJ'
-:; i. 'i " Flow l>. r 6 fJl"t'.-
Meter 3;:; ~ L~ /?
bs:.l4.~ Flow LK "p~
Meter JSi'J24'1"k5;'
~g.~~ Flow /. (J & jJ 1"1
Meter 7SS'"33. ~
i/lN.Ai>/e Flow 7 · 2 (71'111
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6 CfL.4 r.>1
Depth to Water
Date 7. :6'-·.1010 mmHg 6'" ~ D . ur
Ime WII e D th ep1 c t ommen s
1'i3~ MW-4 i l . J.c, Flow 'i.if ,p ~
Meter ~'7~::\J{_~1
1'13\ TW4-15 13 .~ Flow 5.« 6-PM
Meter 3'Qt;t)
TW4-19 tLi. t:t;c, Flow I. 7 6Ppt
Meter IS IS,.x.l,!!
/4;4C. TW4-20 ~'3.I~ Flow l.g {,pM
Meter 77 b 77.15
J'i31 TW4-4 ;6.56 Flow R.h_ 6_P M.
Meter 13MJ b l.'(
.., IUJ",
Water: ~
Date K -J.-,;2010
Ime WII e
lltl{ l MWM 4
143b TW4-15
I ~tJt..j TW4-19
ILl3D TW4-20
, 44!::, TW4-4
Water:
Depth to Water
mmHg b~~ -~Jk
D th ell c t ommen s
/"1. ~:l Flow Y .3 G-PM
Meter .:11 3 8M . ~f,
7:1. ·XLI Flow 5.~ frP,""
Meter D~7l{1'1D
b Y .I ~ Flow I b [ .... eM
Meter J53 06'1.0
~7 1 Flow I.Gf G-PM.
Meter '607 b 9, 00
bg .~l Flow ~,b (,-PPJ\
Meter II-tO~ /l.\.b
7-S146
Depth to Water
Date 8·ft) 2c110 mmHg, _____ _
Time Well DeDth Comments
I?Jf ~ MW-4 te;. g~ Flow 'I. 5 hIm
Meter ~2 J 4 5L~. ~ /ki\./
I"{J ":1-TW4-15 '7Q • .3t Flow ~ (': 'I 6t P t'1
Meter 3 Ktj '17 CJ Idel
11I/1J TW4-19 I~ L 7-K' Flow /. '{ bltvt (t/~ -Meter 1st.! x ~ L.
1.!33 TW4-20 ~:2 7.2. Flow !J tJ (.,~M.
Meter X'J2 70 .. :2 Ale
TW4-4 ~·?s;;. Flow g. ~ L." 1111
Meter J'I ;Zg J -:;.. LI A/<
7S1,~£1 0
I:Water: ~
Depth to Water
Date g .. lb-lOIO mmHg ____________ _
TI W II me e D th ep1 c t ommen s
10'0 MW-4 70.37 Flow "'.s {,. PM
Meter ~707.,.3B
1~15 TW4-15 15.1' Flow 1.7
Meter ~J::l..O
oq't1 TW4-19 '7.13 Flow
Meter '.5'1'3'-0
)"'1 TW4-20 ''I.7({ Flow '.8' GJ>~.
Meter B700'f.'fQ
lO't~ TW4-4 681" Flow g '-l GPA
Meter J 531 tJ~.'4
Water: 77371J{
) Chloroform Wells
Data 8·1& ... ~1O mmHg C;t. , ?1'Z-
Time Well De~th Comments
1251: MW-4 1fl. 61
oe~ TW4-1 ~."
QII~ TW4-2 ,7.~
I~ TW4-3 "11..55
I~~ TW4-4 "1.&5
las2. TW4-5 ,s~ 75-
I~' TW4-6 'Dz g6
D'.13 TW4-7 (,7.1'1
I~' TW4-8 {'.21
.~~ TW4-9 1.1.. !II ,.0 TW4-10 5,.'0
13t10 TW4-11 SI3l
.::a13 TW4-12 ~9y~
I:JI!:I TW4-13 41 li
l;!I' TW4-14 ".s,
12.9!I TW4-15 IS,'t1 s·,. .~ iis 1 .. '
IY!a3. TW4-16 '~I1~!::f
IY.l" TW4-17 :z,.,(~
Ill~ TW4-18 .ss.~
N'f7 TW4-19 4a.o.s
12:~2 TW4-20 ,~ &4"")
Illi TW4-21 ~"'.:Z ,
laYQ TW4-22 ~!:I. y2
1S1b TW4-23 ".11
12~1 TW4-24 55.S.1
13~t TW4-25 Ids.. ,S
13M TW4-26 '~.:ll
Depth to Water
Date ?!·.23 '2010 mmHg &;2 0/. Oll{
T-WilD th C t Ime e ep1 ommen s
J ~ 11 MW~4 n..:2~ Flow 'I.l/ hM.
Meter 1. ~ ~ ~,5'1. L ~
~
IJt 1.3 TW4~15 73-16 Flow 5. I.} h 1/JIi
Meter :3 8'f K S-
,-
Iq t? , TW4~19 itlJ.3K Flow L.. I &'IM. r AU Iih
Meter 15 'I %~
''I/);< TW4~20 hI. ~ r Flow .J. tJ L..,{>M.
Meter iJ()~Ol 'If), I
11./ 2. l{ TW4~4 L:q 71 Flow ~. ¥ 611r\..
Meter J~.3. 4J
Water: 7'i 7:1. J2
~
lA,
Depth to Water
Date 1 ... 30 -JOlt) mmHg (:,17. '18~
Time Well Depth C~JDments
'&(~~ MW-4 "'JIM Flow q . "f GPrt\
Meter ~tJ3u. ",q
1'4'" TW4-15 7().1S Flow s.Cct lrP~
Meter ~1'11~_l)
I..Jg( 1(," ~TW4-19 JD! Flow _ .~ pM
.p~,., ... J 1.'\ I .... ~ .... -.... 1.. &. Meter -....
.". \tJ1Il 'p -,~ b\..' rtl" <lu~ !Jc.J
I"~~ TW4-20 "'4. ~ Flow 2.0
Meter "~.M
N~ TW4-4 UJ~ Flow ,.~ (,I"
Meter ,,-,;a.O,. ~
Water: ffl-'l1b
Date g. 7· to
TI me WI! e
d,!l?o MW~4
t344 TW4~15
i~.21 TW4-19
n~l TW4 .. 20
'.J;~ TW4-4
Water:
Depth to Water
mmHg 6:2l.0,3
D th eD' c t ommen s
--7 D','.-¥) 'h 11 Flow ~~~L.f6c..(!).
Meter ~~.A.:»r ') '-I,q Cf7.. t:
77 .. ;l1 Flow 5.5 ;;PA
Meter ~CJD7tz .. 6b
'II. CZlI Flow ID, ~ APM..
Meter ~j{.>16AO
6) .. _6~ Flow 2. I r;PM
Meter '16'12 1.1
S?1.7 q Flow g' .. 7 ,t.;p P\
Meter I" ~34 1./
g3t7 'i4
\
5
't .. 1:S" 10
Date~
TI me WII e
lD'lf MW-4
1033 TW4-15
lbl~ TW4-19
'1)2..1 TW4-20
I 't!)~" TW4-4
Water:
Depth to Water
mmHg 6 ').l..{ .. t> 7 g
D th eD' c t ommen s
iO_~7 Flow 4 .. 6q 6(JM
Meter ~"34 \0 .. It>
...... • ..... "-9l.l/) Flow 5.'sf GrPA "-Meter lIDLl4~. ~s
Iq'1.~9 Flow 10 to t;P';v\'
Meter .. J 2..41AI.Sl
"S.5~ Flow ~. 10 GP~
Meter Q'6 2~.:t5
ID 74 Flow ~. q &. PM
Meter ,")'1,s'l. ~_.;
16'506l-\
Depth to Water
Date f~;tf Jl@ mmHg,--40-t ____ _
ame wn e o th ell' c t ommen s
1-11.21 MW-4 ? I. 2.() Flow ?': S-&1111
Meter 2~t1.:2.x" .::L ,IIel.)
151 I c:; TW4-15 73.61 Flow 5, tt l~;M.
Meter ll(J172L!i t1ld
1..-L,~",t'.....,.,..
-J1)tJ TW4-19 L._~ Flow L6· I hfl'\.
III;}. IS-Meter 2LfIZ 1Z J
6 .-1"-1 A/~
()ftt. TW4-20 7S.32 Flow I. 1 bPt1'\.
Ll.&<~,;.,. Meter / (};2 7 Or . .3 /llw (/ I
tf12% TW4-4 t,g. <;(7 Flow ~!l LLJJ/H
Meter }M:L5~ .£ JW~
Water: 2> i IJ.S" (j 5'
Depth to Water
Date Cf4 7 ·2,alll mmHg ~J3J3it,
TI me WII e o th eDi c t ommen s
It! '1/ MW-4 :72.{/~ Flow 't.1o bP~
" " . Meter '1t",-~ iI AI~
p-
ft/~t TW4-15 f6.5Y Flow /5,2 bl,.,r..
" r Meter l·/I '-/ t, :; /') tJ/J --
Jtf.~ Sf TW4-19 /M" II Flow '1.1" &tIM lr: Meter ~ 14 t,t52 !!l A •
1'152 TW4-20 ;;1. 1~ Flow /. g ~/~
Meter /0 FP" I. ./ A/,.
1'1 f.~ TW4-4 £r,l2-Flow q ~ trlJ¥....
Meter Lt[/~ ¥ NwJ
Water: gq L/4tt ()
TabD
Kriged Current Quarter Groundwater Contour Map, Details Map, and Depth to Water Summary
/J I(
\1
\\ # ~ ~~. ~=~
4 1/ ,I
,I
I' I ~I
II
/' II
II
~ ~
II
1132 II
II
II
II
II
II
II
II
II
II
MW~ -9dry-
PROPERlY
BOUNDARY
MW-01 e5582
MW-18 e5587
05585 TWN-10
~4
05583 TWN-9
)(:.--b&"--==.:= b ' -
~?
_ 55
\ \ c
(
• M*-21 \ \ ~
o
MW-22
.5450
0 5555
PIEZ-l
~ 5593
TWN-4 ~5605
TW4-26
~5537
MW-34
-9-5492
N
" \ \. ~~ ~~
~,
MW-20
56
~~ ~~ ~~ ~~ --=--=-..... ~-=--=--~, ~ /?-=--=--~-:::--4 --=--=--=--=--=--=--
SCALE IN FEET
EXPLANATION
perched monitoring well showing
elevation in feet amsl
temporary perched monitoring well
showing elevation in feet amsl
perched piezometer showing
elevation in feet amsl
temporary perched nitrate monitoring well
showing elevation in feet amsl
temporary perched monitoring well installed
May, 2010 showing elevation in feet amsl
perched monitoring well installed
August/September, 2010
showing elevation in feet amsl
3000
,s,,6'o
MW-22 "'-
e5450 '"
II
//
//
//
//
//
//
//
//
//
// NOTE: MW-4, MW-26, TW4-4, TW4-19 and TW4-20 are pumping wells
HYDRO
GEO
CHEM,INC. APPROVED
KRIGED 3rd QUARTER, 2010 WATER LEVELS
WHITE MESA SITE
DATE REFERENCE FIGURE
SJS H:l718000/nov1 O/w1091 O.srf
\
/I f{
\1
~
II 1/ , ~.:::-. ~ =::::t-
~-:;::;-.Q ~
lI.,r
# " ,I
I' I ~:I
,I
" II
" II
,I
I'
"
"
32
-1-21
II
II \ \ \ \, N ~~ -~
~
PROPERTY
BOUNDARY
~s.,eo MW-2056
~
MW-01
e5582
MW-18 e5587
05585 TWN-10
05583
TWN-9 P\EZ~·
"5593
5 -4
? ~
?.i-.::::-=--===-
-----------55
~ ~
D
(
~
\
~ ~ --=--=--=--=-~~:-"\ ~-=--=--'::::..-::=:-.9' -~-=--=--=--=--=-~6'o
I --------=====-.............. ~==========~
o
MW-22
.5450
0 5555
PIEZ-1
g 5593
TWN-4
~5605
TW4-26 ~5537
MW-34
-¢-5492
3000
SCALE IN FEET
EXPLANATION
perched monitoring well showing
elevation in feet amsl
temporary perched monitoring well
showing elevation in feet amsl
,. ,.,.,-.
" ,',',' estimated capture zone l l l l boundary stream tubes
perched piezometer showing
elevation in feet amsl
I , " resulting from pumping
temporary perched nitrate monitoring well
showing elevation in feet amsl
temporary perched monitoring well installed
May, 2010 showing elevation in feet amsl
perched monitoring well installed
August/September, 2010
showina elevati'on in feet amsl
HYDRO
GEO
~INC.
" J/ MW-22 " # 50 #
#
#
#
#
#
#
#
#
NOTE: MW-4, MW-26, TW4-4, TW4-19 and TW4-20 are
KRIGED 3rd QUARTER, 2010 WATER LEVELS
AND ESTIMATED CAPTURE ZONES
WHITE MESA SITE
wells
/lPPAOVE.D DATE REFERENCE FIGURE
SJS H:/718000/nov1 O/w1091 Ocz2.srf
N
EXPLANATION 1 , ... " ,'" ,.
" " ,',' estimated capture zone
" " ,',' boundary stream tubes , , " resulting from pumping o 150 300
SCALE IN FEET
<>TWN-1 ., . .... __ N_O_T_E_: M_W_-4_,_M_W_-2_6_, _TW_4_-4_,_TW_4..,-1_9....;.,_a_nd_T_W_4_-2_0_a_r_e..;...p_um--'-pi_n.:;..9_w_e_lIs ______________ ---4 temporary perched nitrate momtonng
5599 well showing elevation in feet amsl • KRIGED 3rd QUARTER, 2010 WATER LEVELS
HYDRO AND ESTIMATED CAPTURE ZONES o TW4-1 temporary perched monitoring well G 0 WHITE MESA SITE
5555 showing elevation in feet amsl __ ~ E (detail map)
• MW-32 perched monitoring well showing CHEM, INC.
5549 elevation in feet amsl H:/718000/aug1 O/wl091 Oez.srt
FIGURE
SJS
Quarterly Depth to Water
NAME: Tanner Holliday, Garrin Palmer MMHG:
Start time: 730
DATE: 9/29/2010 Finish Time: 1442
TIME WELL 1.0. DEPTH TIME WELL 1.0. DEPTH TIME WELL 1.0. DEPTH
922 MW-l 65.32 812 TW4-1 63.32 846 PIEZ-l 62.11
1433 MW-2 109.74 815 TW4-2 67.48 841 PIEZ-2 15.36
1359 MW-3 84.02 816 TW4-3 48.72 830 PIEZ-3 38.07
1400 MW-3A 85.57 819 TW4-4 68.25 1345 PIEZ-4 48.85
1000 MW-4 74.00 823 TW4-5 56.15 1348 PIEZ-5 44.19
1256 MW-5 106.47 827 TW4-6 70.75
957 MW-ll 89.61 1259 TW4-7 67.62 819 TWN-l 48.91
1223 MW-12 108.55 1341 TW4-8 67.06 751 TWN-2 15.32
1236 MW-14 103.83 915 TW4-9 54.67 822 TWN-3 31.64
1240 MW-15 106.53 918 TW4-10 56.39 827 TWN-4 37.28
1354 MW-17 76.22 1317 TW4-11 57.95 1917 TWN-5 69.83
914 MW-18 70.49 835 TW4-12 38.55 909 TWN-6 74.70
843 MW-19 51.22 837 TW4-13 46.77 918 TWN-7 89.43
1412 MW-20 84.11 839 TW4-14 88.40 911 TWN-8 61.74
1418 MW-22 67.27 845 TW4-15 78.02 847 TWN-9 64.20
1219 MW-23 119.31 851 TW4-16 63.48 907 TWN-l0 81.56
1214 MW-24 114.65 941 TW4-17 76.41 901 TWN-ll 69.60
1249 MW-25 75.02 818 TW4-18 57.67 859 TWN-12 34.51
845 MW-26 78.02 856 TW4-19 96.13 849 TWN-13 46.95
811 MW-27 51.00 905 TW4-20 69.20 852 TWN-14 63.00
950 MW-28 77.30 815 TW4-21 62.75 904 TWN-15 92.23
947 MW-29 102.49 909 TW4-22 54.12 856 TWN-16 48.42
945 MW-30 76.13 921 TW4-23 65.90 854 TWN-17 34.78
943 MW-31 69.12 925 TW4-24 55.65 825 TWN-18 57.95
941 MW-32 76.41 813 TW4-25 46.23 740 TWN-19 53.38
1442 MW-33 107.94 927 TW4-26 64.73
1440 MW-34 DRY
1438 MW-35 112.31
Comments: MW-15 was found unlocked, problem was taken care of. Tanner and Garnn split up to
perform depth checks so some of the times may appear to be on top of each other but there were two technicians.
TabE
Kriged Previous Quarter Groundwater Contour Map
/I I(
\1
\\ # ~ ~.;:::-. ~=~
;{
#' II
"
"
,
~II
I,
"
"
"
9 ¥
:' I' 32
I'
" I' II
"
" I' II
,I
II
PROPERTY
BOUNDARY
TWN-150 5584
TWN-1C» 5585
TWN-90 5583
~ IEZ-Q56 2
If
______ ----552
~ ~
[]
(
• M~-21
\ \ ~
" \ ~~ ~~
N '\" ~~ ~~
~~o MW-20 .5457
~~ ~~ --=..-=.. '~-=..-=..-~, ~ 4"-=--=--:::::..-",-~ --=--=--=--=---~--:::::---~
~~~~iiiiiiiiiiiiliiiiiiiiiii~~'
0 3000
SCALE IN FEET
EXPLANATION
MW-22 perched monitoring well showing
• 5450 elevation in feet amsl
o 5556 temporary perched monitoring well
showing elevation in feet amsl
PIEZ-1 perched piezometer showing
Q 5594 elevation in feet amsl
TWN-4 temporary perched nitrate monitoring well ~5605 showing elevation in feet amsl
TW4-26 temporary perched monitoring well installed ~5537 May, 2010 showing elevation in feet amsl
d:t80
MW-22 "" II
.5450 '" // //
//
//
//
//
//
//
//
//
NOTE: MW-4, MW-26, TW4-4, TW4-19 and TW4-20 are pumping wells
HYDRO
GEO
CHEM,INC.
KRIGED 2nd QUARTER, 2010 WATER LEVELS
WHITE MESA SITE
APPROVED I DATE REFERENCE FIGURE
SJS H:l718000/aug1 O/wl061 O.srf
"
TabF
Hydrographs of Groundwater Elevations Over Time for Chloroform Monitoring Wells
N o o o
Depth Below Measuring Point (ft.)
00 o 0\ o .j:>. o ~ 0
09/25/79
-02/06/81
06/21 /82
11 /03/83
03/17/85
07/30/86
12112/87
04/25/89 ~
09/07/90 ~
01/20192 ~ ;-..,
06/03/93 ~ ~
"'CI
10116/94 ..... =-
02/28/96 ~ ~ ..,
07112197 ~ .... e
11 /24/98
.~
~ t""
04/07/00 C" .-a
08/2010 I "'CI '-'
01 /02/03
05/16/04
09128105
-02/10/07
06124/08
~ 11106/09
-03 /21 /11
08/02112
...... o o
Depth Below Measuring Point (ft.)
'" o
<: /"
00 o -...) o
~
0\ o
~ ---.,
~\
~
-.. ~ K ~
+<:: ~
r?
Il < ~~
~
~
~
Ul o ~ o IoN o N o ...... o o
-
04/04/02
09/01102
01/29/03
06/28/03
11/25/03
04/23/04
09120104
02/17/05
07/17/05
12/14/05
05113106
10110106
03/09/07
08/06107
s= ~ ~ > ~ ;-.,
~ (It)
"C .... =-0 -< (It) .,
~ -. a
(It) --~
0" -a
"C --
00
VI
00 o
Depth Below Measuring Point (ft.)
-.l VI -.l o 0\ VI
0\ o VI VI VI 0
11108/99
04/06/00
-09103/00
01/31/01
06/30101
11127101
04/26/02
09/23/02
02/20103 ~ ~ "'" 07120103 I
1-&
12/17/03 ~ .....
05/15/04 ~
'"'I
~
10/12/04 ~ "'C .....
03/11105 =-0
08108/05 -< ~ '"'I
01/05/06 ~ ... 9 ,. 06/04/06 ~ .-
-11101/06 ~
0" -03/31107 9 "'C
08128/07 --
-01125/08
06/23/08
11120108
-04119/09
09/16/09
,. 02/13/10
-07/13110
12/1 0/10
05/09/11
00 VI gg
Depth Below Measuring Point (ft.)
'-J VI '-J o 0'1 VI 0'1 o VI VI VI 0
11/08/99
04/06/00
09/03/00
01 /31 /01
06/30/01
11/27/01
-04/26/02
09/23/02
02/20/03 1-3 ~
07/20/03 t-N
,. 12/17/03 ~
"""" -05/15104 tD .,
~ 101'12/04 tD "'C
0311 1/05 st
08/08/05 ~ tD ...,
01 /05/06 1-3
1-0'
06/04/06 a tD
J 1101/06
-.. ~
a' -03/31/07 a "'C
08/28/07 --
. 01/25/08
06/23 /08
11/20108
04/19/09
09/16/09
02/13/10
-07113110
,. 12/1011 0
05/09/11
-.l VI -.l a
Depth Below Measuring Point (ft.)
0\ VI 0\ a VI VI VI o ~ VI ~ a
11129/99
04/27/00
09124100
02/21101
07/2110]
-12/18/01
-05/] 7102
10/14/02
03/13/03 ~ ~ ~ -08/10103 I (H
01/07/04 ~ ......
-06/05/04 ~ ""l
~ 11102104 ~
"C ......
04/01/05 =-0
08/29/05 -< ~
""l
01126106 ~ ....
06/25/06 a ~ -.
11/22/06 ~
0" -04/21107 a "C
09/18/07 --
02/15/08
-07/14/08
12/11/08
05/10109
10107/09
03/06/10
08/03/10
12/31/10
05/30/11
-...... o
...... o o
Depth Below Measuring Point (ft.)
'-0 o 00 o -.l o 0'1 o VI 0
05/25/00
-09/02/00
-12/11/00
-03/21101
-06/29/01
10107/01
-0]/15/02
.-04/25/02
~ 08/03/02
-11111102
,. 02119/03
05/30103 ~ ~ -09/07/03 ~ I
-12116103 ~
03/25/04 ~
07/03/04 .... ~
~ 10/11/04
.,
~
01119105 ~ "0
04/29/05 .... =-08/07/05 0
11/15/05 -< ~ .,
-02/23106 ~ ...
06103/06 51
09111106 ~ -.
12/20106 ~
03/30107 "a' -07/08/07 51
"0
10/16107 --
01124108
05/03/08
08/11/08
11119108
02/27/09
06107/09
09/15/09
12124109
04/03/10
07/12110
10/20/10
,-01/28/11
05/08/11
0\ N
0\ o
Depth Below Measuring Point (ft.)
VI 00 VI 0\ VI ~ VI N VI 0
01/02/00
04/11/00
-07/20100
10/28/00
02/0S/01
-OS/16/01
08/24/0]
12/02/01
-03/12/02
06/20102
09/28/02
01/06/03 l-3 04116103 ~ -07/2S/03 ~ I
-] 1102103 til
02/10104 ~
OS/20104 ...... ~
08/28/04 "1
~ 12/06/04 ~
"'C
03/16/0S ...... =--06/24/0S 0
-10102/0S -< ~
-01110106 "1
l-3
04/20106 .... e -07/29/06 ~
11/06106 --~
-02/14/07 C'" -OS/2S/07 e
09/02/07 "'C --12111/07
03/20108
06/28/08
] 0106108
01114/09
04/24/09
08/02/09
1]/1 0109
02/]8/10
OS/29/10
09/06110
]2/1S/10
-03/2S/11
07/03/1 ]
\0 o 00
U'l
00 o
Depth Below Measuring Point (ft.)
-.l
U'l
-.l o 0\ U'l 0\ o U'l
U'l
U'l o
OSI2SI00
09/02/00
12/11/00
03/21101
06/29/01
10107101
01/1S102
04/25102
08/03/02
11111/02
02119/03
OSI30103 ~
09/07/03 ~ .&;.
12116103 I ~
03/25104 ~ 07/03/04 ..... ~
10/11/04 ..,
e" 01119/0S ~
04/29/05 ""0 ..... =-08/07/0S 0
11/15105 -< ~
02/23/06
..,
~
06/03/06 ... e
09111106 ~ --12/20106 ~
03/30107 C" -07/08/07 e ""0 10/16107 --
01/24/08
OSI03/08
08111108
11/19/08
02/27/09
06/07/09
09/15109
12/24/09
04/03110
07112/10
10/20/10
01128/11
05108/11
00
Vl
00 o
Depth Below Measuring Point (ft.)
-..J Vl -..J o 0"1 Vl 0"1 o Vl
Vl
Vl 0
11/29199
03/08/00
06116100
09/24/00
01102101
-04112/01
07/21/01
-10/29101
02/06102
05117102
-08/25102
12/03/02 ~ -03/13/03 ~ -06/21/03 ~ I
-09/29103 -.....l
-01107104 ~
~ 04116/04 ...... ~
07/25104
..,
~ 11/02/04 ~ "C 02/10105 ...... =-05/21105 0
08/29105 -< ~
12/07/05 ..,
~
03117106 .... a 06/25106 ~
10103/06 --~
01111107 0" -04/21107 a
07/30107 "C --11107107
02/15108
05/25108
09102/08
12/11/08
03/21/09
06/29109
10107/09
01115110
04/25110
08/03110
11111110
02119/11
05/30111
00 o -..l 00 -..l 0"1
Depth Below Measuring Point (ft.)
-..l ~ -..l N -..l o 0"1 00 0"1 0"1 0"1 0"1 ~ N 0"1 0
-11/29/99
-03/08/00
06/16/00
09/24/00
,-01102/01
,-04112/01
07/21101
10/29/01
,-02/06102
-05/17/02
08/25/02
12103102 1-3 03/13/03 ~ 06/21/03 ~ I
09/29/03 QC
01107104 ~
04/16104 ...... ~
07/25/04 ""l
~
11/02/04 ~ ""CS
02110105 ...... =-05/21105 0
08/29/05 -< ~
12/07/05 ""l
1-3 03/17/06 ... a 06/25106 ~
10103/06 -. ~
01/11107 a -04/21/07 a
07/30107 ""CS '-'
11/07/07
02/15108
05/25/08
09/02/08
-12/11108
-03/21109
06/29/09
-10107/09
01115/10
04/25110
-08/03/10
11/11/10
-02119111
05/30/11
-.J o 0'1 00 0'1 0'1
Depth Below Measuring Point (ft.)
0'1 .j::>. 0'1 tv 0'1 o VI
00
VI 0'1 VI .j::>. VI tv VI 0
12/20/99
03/29/00
,-07/07/00
-10/15/00
01123/01
05/03/01
-08111101
11119/01
02127/02
06/07/02
09115102
12/24/02 ~ -04/03/03 ~ 07/12/03 "'" I
10/20103 \C
01128104 ~
05/07/04 ...... t'D
08/15/04 "1
~ 11/23/04 t'D "'C -03/03/05 ...... =-06111105 0
09119/05 -< t'D
-12/28/05 "1
~ -04/07/06 ... e -07116106 t'D
-10/24/06 -. ~
02/01/07 C'" -05112107 e
08/20107 "'C ---11128/07
03/07/08
06115108
09/23/08
-01/01109
04111109
07120109
10128/09
02/05110
05116110
08124110
-12/02110
03/12111
06/20111
Vl 10 Vl 00
Depth Below Measuring Point (ft.)
Vl -....]
Vl
0\
Vl
Vl
Vl -l:>. Vl w
01103/02
04/13/02
07/22/02
10/30102
02/07/03
OS/18/03
~ 08/26103
--12/04/03
,. 03/13104
06/21 /04
. 09/29/04
01107/0S
04/17/0S
07/26105
l1l03/0S
02/11106
OS/22/06
-08/30106
12/08/06
-03/18107
06/26107
10104/07
01112108
04/21/08
07/30108
11107108
02/1S/09
OS/26109
09/03/09
-12/12/09
03/2211 0
06/30/10
10108/10
01116/11
04126111
~ ~ ~ I ~
Q
~ a-..,
~ ~ "'C ..... =-0 -< ~ ..,
~ -. a ~ -. ~
C'" -a "'C --
00 o ...)
VI
Depth Below Measuring Point (ft.)
-l o 0\ VI 0\ o VI VI VI 0
01 /03/02
04/13/02
07/22/02
10/30102
02/07/03
05/18/03
~ 08/26/03
12/04/03
03/13104
-06/21 /04
-09/29 /04
-01 /07/05
-04/17105
07/26/05
] 1103105
02/11 /06
05/22/06
08/30/06
12/08/06
03 /18/07
-06/26/07
10104/07
01 /12/08
04121 /08
07/30/08
11/07/08
02/15109
OS/2 6/09
-09/03 /09
'12/12/09
03/22/10
06/30/10
10/08/10
-01 /16111
04/26111
i-3 ~ ~ I ~ ~
~ ;-..,
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t .j:::. w .j:::. tv
Depth Below Measuring Point (ft.)
.j:::. ....... .j:::. o W \0 w
00
w -..l w w 0'1 VI w .j:::.
08/23/02
12/01/02
03111/03
06/19/03
09/27/03
01105/04
04/14/04
07/23/04
~ 10131/04
1-3 -02/08/05 ~
05/19105 ~ I
~
~ 08/27/05 ~
~ 12/05/05 ...... ~
-03115106 ..,
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06/23106 ~ "'C ......
-10/01/06 =-
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04/19107
..,
1-3 -. 07/28/07 e ~
11105107 -. ~
02113108 r::t' -05/23/08 e
"'C --08/31108
-12/09/08
-03/19109
-06/27/09
-10105/09
01/13110
04/23110
08/01110
11/09/10
02/) 7111
05/28/) 1
...... o o \CJ o
Depth Below Measuring Point (ft.)
00 o -....l o 0\ o Ul o .j:>. 0
08/23/02
12/01/02
03/11103
06/19/03
-09/27/03
,-01/05104
04/14/04
07/23/04
10131104 ~
,~ 02/08/05 ~ ~
-05/19/05 I
~ ~
08/27/05 ~ 12/05105 ...... ~
03115106 "1
~
06/23/06 ~ ~ ......
10101/06 =-0
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-07/28/07 a ~
11105107 -. ~
02/13/08 C'" -05/23/08 a
~ --08/31/08
12/09/08
03/19/09
-06127109
10105/09
01/13110
-04/23110
-08/01/10
-11109110
-02117/11
05128111
\0 VI ':f
Depth Below Measuring Point (ft.)
\0 W \0 tv \0 \0 o 00 \0 00 00
I. 08/23/02
12/01.102
03 /11 /03
-06119103
09127/03
. 01/05/04
04/14/04
07/23 /04
10/31 /04
~ 02/08/05 ~ ~
-05/19/05 f'
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~ -12/05105 ~
-03115106 "1
~
06/23 /06 t'D "0
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0 01/09/07 ~ t'D
0411 9107 "1
1-3 ...
07128/07 a t'D
-11/05107 -. ~
02/13/08 C" -OS/23/08 a "0
08/31/08 '-'
12/09/08
03/19/09
06/27109
10/05109
01/1311 0
04/23110
08/01 /10
11 /091 10
02/17/11
OS/28111
-o o \C o
Depth Below Measuring Point (ft.)
00 o -J o 0\ o VI o ~ 0
08/23/02
-12/0 I 102
03111103
06/19/03
09/27/03
,-01 /05104
,-04/14/04
07123104
10/3 1/04
02/08/05
05/19105
08/27/05
12/05/05
03 /1 5106
06123106
1 0101./06
01 /09/07
04119107
07/28/07
11/05107
02113108
05/23/08
08/3 1/08
12/09/08
03/19/09
06127/09
10/05109
01 /13110
-04/2311 0
08/0 1/10
~ 11/09/10
-02/1711 1
-05128/11
1-3 ~ "" I ,....
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C'" -e
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VI
Depth Below Measuring Point (ft.)
-..) o 0-VI 0-o VI VI VI 0
08/23/02
-12/01/02
03/11/03
06119103
09/27/03
01 /05/04
04/J4/04
07/23/04
10/31/04
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08127/05 0'\
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03/15/06 "1 ;;
06123106 n> "'C:l
10/01/06 e-
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04/19/07 "1
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07/28/07 S" n>
11105107 -. ~
02/13/08 C" -05/23/08 a "'0 '-' 08/31/08
12/09/08
" 03/19/09
06/27/09
10105109
01/13110
04/23/10
08/011 10
~ 11 /0 911 0
~ 02117/11
05128111
00 .j:>. 00 w 00 tv
Depth Below Measuring Point (ft.)
00 ...... 00 o -..l
'"
-..l 00 -..l -..l -..l 0\
-08/23/02
-12/01/02
03/11103
-06119/03
-09/27103
01l0S/04
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07/23/04
10131104
-02/08/0S ~ ~
OS/19/05 ~ I ~
08/27/0S -....1
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06/23/06 ~ "'CI ......
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01/09/07 0 -< ~
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07/28/07 = ~
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02113/08 C'" -05/23/08 = "'CI --08/31108
12/09/08
03/19109
06/27/09
10105109
01113110
04/23110
08/01/10
11109/10
02/17111
OS/28/11
VI '-0 VI 00 VI -....J
Depth Below Measuring Point (ft.)
VI 0\ VI VI VI ..,. VI
W
VI N VI
>-'
VI 0
-08/23/02
12/01/02
03111103
06119/03
09/27/03
-01/05104
04/14/04
07/23/04
10131/04
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05119105 .&;;0.
I
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06/23/06 ~ ""0 .....
10101/06 =-
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04119/07
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07/28/07 a ~
11/05107 ---~
02/13/08 0" --05/23/08 a
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12/09/08
03/19/09
06/27/09
10/05/09
01/13/10
04/23/10
08/01110
-11109110
02117111
05/28/11
...... o o \0 o
Depth Below Measuring Point (ft.)
00 o -...J o 0\ o Ul o ~ 0
~ 08123/02
-12/01/02
03111103
06/19103
09/27/03
01/05/04
04114104
07/23/04
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02/08/05 ~ ~
05119105 I i-oo'
\0
08/27/05 ~ 12/05/05 ..... ~
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01/09107 -< ~ .,
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07/28/07 e ~
11/05/07 .-~
02/13/08 C'" -05/23/08 e '"0 --08/31/08
12/09108
03119109
06/27/09
-10105/09
01113/10
04/23110
08/01/10
11109/10
02117/11
05/28/11
>-' o o 1.0 o
Depth Below Measuring Point (ft.)
00 o -.l o 0\ o VI o ~ 0
07/29/05
-09/17/05
-11106105
-12/26/05
02/14/06
04/05/06
05/25/06
~ 07/14/06
09/02/06
10/22/06
12/11/06
01130107
03/21107
05/10107
06/29/07
08/18/07
10107/07
11/26/07
01115108
03/05/08
04/24/08
06/13/08
08/02/08
09/21/08
11/1 0108
12/30108
02118109
-04/09/09
05/29/09
07/18109
09/06/09
10/26/09
-12/15/09
02/03/10
03/25/10
-05/14110
07/03/10
08/22110
1 0111/1 0
11130/10
01/19/11
,..,
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I N
0
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Depth Below Measuring Point (ft.)
0'1 o VI
00
VI
0'1
VI ~ VI tv
07/29/05
09117105
-11/06105
-12/26/05
02114/06
-04/05/06
05/25/06
07114106
09/02/06
10/22/06
12/11106
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05/10107 N
1-00'
06/29/07 ~ 08118107 ......
10107/07 ~ '"t
11126107 ~ ~
01115/08 "'Cl ......
03/05/08 =-0 04/24/08 -< ~
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08/02/08 ~ .,.. a 09/21/08 ~
-1111 0108 --~
12/30108 'a' --02/18/09 a
04/09/09 "'Cl --05/29/09
07/18/09
09/06109
-10/26109
12115109
-02/03110
-03/25/10
05114110
-07/03110
-08/22/10
,-1011111 0
-11130110
01119111
VI 1.0 VI 00 VI 00
Depth Below Measuring Point (ft.)
VI -.J VI -.J
VI
0\
VI
0\
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VI
VI VI VI ~ VI ~
07/2910S
09/17/0S
11106/0S
12/26/05
02/14/06
04/05/06
OS/2S/06
07/14/06
09/02/06
10/22/06
12/11106
01130107
03/21107
05110107
06/29107
08/18/07
10107/07
11/26/07
01l1S/08
03/0S/08
04/24/08
06/13/08
08/02/08
09/21108
11110108
12130/08
02/18/09
04/09109
OS/29109
07/18/09
09/06/09
10/26/09
12/1S/09
02/03110
03/2SI10
OSI14110
07/03110
08/2211 0
10111110
11130110
01/19111
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Depth Below Measlu·ing Point (ft.)
0\ 00 0'1 00 0\ -..J 0\ -..J 0'1 0\ C\ 0\
0911 3/07
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12/22/07
02/1 0108
03/31/08
OS/20/08
07/09/08
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08/28/08 ~ ~ I
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12/06/08 ~ ;-...
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03/16/09 ~ ='"
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03/01 /10
04/20/10
06/09110
07/29110
09/17/10
11 /0611 0
12126/10
Vl -....l ~
Vl Vl -....l ;-J tv 0
Depth Below Measuring Point (ft.)
Vl Vl Vl Vl Vl Vl
?'I 0\ 0\ 0\ 0\ Vl
00 0., ~ tv 0 00
Vl Vl Vl Vl
0., ~
09/13/07
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12/22/07
02110/08
03/31108
OS/20/08
07/09/08
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08/28/08 ~ ". I
10/17/08 N ".
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06/24/09 ~ ... a
08/13/09 n> --~
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-03/01/10
04120110
-06/09/10
07/29110
09/17/10
11106110
12/26/10
-.J o 0\ o
Depth Below Measuring Point (ft.)
VI o
<
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0211 0108
03/31 /08
05/20108
07/09108
l-3
08/28/08 ~.
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10/17/08 N til
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01 /25/09 ~ ~
03/16/09 '"CS ... =r.
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06/24/09 l-3 .... e
0811 3109 ~ -. ~
10/02/09 C"" -e 11 /21 /09 S
-01/1 011 0
03 /01/10
04/20110
06/09/1 0
07/2911 0
09/17/10
11 /0611 0
12/26110
01/6010 I
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TabG
Depths to Groundwater and Elevations Over Time for Chloroform Monitoring Wells
Water Levels and Data over Time
White Mesa Mill -Well MW 4
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,620.77 5,622.33 1.56 123.6
5,527.63 09/25/79 94.70 93.14
5,527.63 10110/79 94.70 93.14
5,528.43 01/10/80 93.90 92.34
5,529.93 03/20/80 92.40 90.84
5,528.03 06/17/80 94.30 92.74
5,528.03 09115/80 94.30 92.74
5,527.93 10/08/80 94.40 92.84
5,527.93 02/12/81 94.40 92.84
5,525.93 09/01/84 96.40 94.84
5,528.33 12/01184 94.00 92.44
5,528.13 02/01185 94.20 92.64
5,528.33 06/01/85 94.00 92.44
5,528.93 09/01/85 93.40 91.84
5,528.93 10/01/85 93.40 91.84
5,528.93 11/01/85 93.40 91.84
5,528.83 12/01185 93.50 91.94
5,512.33 03/01/86 110.00 108.44
5,528.91 06/19/86 93.42 91.86
5,528.83 09/01/86 93.50 91.94
5,529.16 12/01186 93.17 91.61
5,526.66 02/20/87 95.67 94.11
5,529.16 04/28/87 93.17 91.61
5,529.08 08/14/87 93.25 91.69
5,529.00 11120/87 93.33 91.77
5,528.75 01/26/88 93.58 92.02
5,528.91 06/01/88 93.42 91.86
5,528.25 08/23/88 94.08 92.52
5,529.00 11/02/88 93.33 91.77
5,528.33 03/09/89 94.00 92.44
5,529.10 06/21/89 93.23 91.67
5,529.06 09/01/89 93.27 91.71
5,529.21 11/15/89 93.12 91.56
5,529.22 02/16/90 93.11 91.55
5,529.43 05/08/90 92.90 91.34
5,529.40 08/07/90 92.93 91.37
5,529.53 11113/90 92.80 91.24
5,529.86 02/27/91 92.47 90.91
5,529.91 OS/21/91 92.42 90.86
5,529.77 08/27/91 92.56 91.00
5,529.79 12/03/91 92.54 90.98
5,530.13 03/17/92 92.20 90.64
5,529.85 06/11/92 92.48 90.92
5,529.90 09/13/92 92.43 90.87
Water Levels and Data over Time
White Mesa Mill -Well MW 4
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (q Monitoring ~blw.MP) (blw.LSD) Well
5,620.77 5,622.33 1.56 123.6
5,529.92 12/09/92 92.41 90.85
5,530.25 03/24/93 92.08 90.52
5,530.20 06/08/93 92.13 90.57
5,530.19 09/22/93 92.14 90.58
5,529.75 12114/93 92.58 91.02
5,530.98 03/24/94 91.35 89.79
5,531.35 06/15/94 90.98 89.42
5,531.62 08/18/94 90.71 89.15
5,532.58 12/13/94 89.75 88.19
5,533.42 03/16/95 88.91 87.35
5,534.70 06/27/95 87.63 86.07
5,535.44 09/20/95 86.89 85.33
5,537.16 12/11195 85.17 83.61
5,538.37 03/28/96 83.96 82.40
5,539.10 06/07/96 83.23 81.67
5,539.13 09/16/96 83.20 81.64
5,542.29 03/20/97 80.04 78.48
5,551.58 04/07/99 70.75 69.19
5,552.08 05/11199 70.25 68.69
5,552.83 07/06/99 69.50 67.94
5,553.47 09/28/99 68.86 67.30
5,554.63 01103/00 67.70 66.14
5,555.13 04/04/00 67.20 65.64
5,555.73 05/02/00 66.60 65 .04
5,556.03 05111100 66.30 64.74
5,555.73 05/15/00 66.60 65.04
5,555.98 OS/25/00 66.35 64.79
5,556.05 06/09/00 66.28 64.72
5,556.18 06116/00 66.15 64.59
5,556.05 06/26/00 66.28 64.72
5,556.15 07/06/00 66.18 64.62
5,556.18 07/13/00 66.15 64.59
5,556.17 07118/00 66.16 64.60
5,556.26 07/25/00 66.07 64.51
5,556.35 08/02/00 65.98 64.42
5,556.38 08/09/00 65.95 64.39
5,556.39 08115/00 65.94 64.38
5,556.57 08/31100 65.76 64.20
5,556.68 09/08/00 65.65 64.09
5,556.73 09113/00 65.60 64.04
5,556.82 09/20/00 65.51 63.95
5,556.84 09/29/00 65.49 63.93
5,556.81 10/05/00 65.52 63.96
Water Levels and Data over Time
White Mesa Mill -Well MW 4
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,620.77 5,622.33 1.56 123.6
5,556.89 10112/00 65.44 63.88
5,556.98 10119/00 65.35 63 .79
5,557.01 10/23/00 65.32 63 .76
5,557.14 11109100 65.19 63.63
5,557.17 11114/00 65.16 63.60
5,556.95 11121100 65.38 63.82
5,557.08 11130100 65.25 63.69
5,557.55 12/07/00 64.78 63.22
5,557.66 01114/01 64.67 63.11
5,557.78 02/09101 64.55 62.99
5,558.28 03129101 64.05 62.49
5,558.23 04/30101 64.10 62.54
5,558.31 05/31/01 64.02 62.46
5,558.49 06/22/01 63.84 62.28
5,558.66 07110101 63.67 62.11
5,559.01 08/20101 63.32 61.76
5,559.24 09119101 63.09 61.53
5,559.26 10102/01 63.07 61.51
5,559.27 11108/01 63.06 61.50
5,559.77 12/03/01 62.56 61.00
5,559.78 01103/02 62.55 60.99
5,559.96 02/06/02 62.37 60.81
5,560.16 03/26/02 62.17 60.61
5,560.28 04/09102 62.05 60.49
5,560.76 05/23/02 61.57 60.01
5,560.58 06105102 61.75 60.19
5,560.43 07/08/02 61.90 60.34
5,560.44 08/23/02 61.89 60.33
5,560.71 09/11102 61.62 60.06
5,560.89 10/23/02 61.44 59.88
5,557.86 11122/02 64.47 62.91
5,561.10 12/03 /02 61.23 59.67
5,561.39 01109103 60.94 59.38
5,561.41 02112/03 60.92 59.36
5,561.93 03 /26103 60.40 58.84
5,561.85 04/02/03 60.48 58.92
5,536.62 05101103 85 .71 84.15
5,528.56 06/09103 93.77 92.21
5,535.28 07/07/03 87.05 85.49
5,534.44 08/04/03 87.89 86.33
5,537.10 09/11103 85.23 83.67
5,539.96 10102/03 82.37 80.81
5,535.91 11/07/03 86.42 84.86
Water Levels and Data over Time
White Mesa Mill -Well MW 4
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) ~MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,620.77 5,622.33 1.56 123.6
5,550.70 12/03/03 71.63 70.07
5,557.58 01115/04 64.75 63.19
5,558.80 02/10/04 63.53 61.97
5,560.08 03/28/04 62.25 60.69
5,560.55 04/1 2/04 61.78 60.22
5,561.06 05/13/04 61.27 59.71
5,561.48 06/18/04 60.85 59.29
5,561.86 07/28/04 60.47 58.91
5,529.17 08/30/04 93.16 91.60
5,536.55 09/16/04 85.78 84.22
5,529.00 10/1 1/04 93.33 9l.77
5,541.55 11116/04 80.78 79.22
5,541.12 12/22/04 81.21 79.65
5,540.59 01118/05 81.74 80.18
5,542.85 02/28/05 79.48 77.92
5,537.91 03/15/05 84.42 82.86
5,548.67 04/26/05 73.66 72.10
5,549.53 05/24/05 72.80 71.24
5,544.36 06/30/05 77.97 76.41
5,545.16 07/29105 77.17 75.61
5,544.67 09/12/05 77.66 76.10
5,541.28 09/27/05 81.05 79.49
5,536.96 12/07/05 85.37 83.81
5,546.49 03/08/06 75.84 74.28
5,546.15 06113 /06 76.18 74.62
5,545.15 07/18/06 77.18 75.62
5,545.91 11117/06 76.42 74.86
5,545.90 02/27/07 76.43 74.87
5,548.16 05/02/07 74.17 72.61
5,547.20 08/13/07 75.l3 73.57
5,547.20 10110/07 75.13 73.57
5,547.79 03/26/08 74.54 72.98
5,545.09 06/25/08 77.24 75.68
5,550.36 08/26/08 71.97 70.41
5,550.39 10/14/08 71.94 70.38
5,542.25 03/03/09 80.08 78.52
5,542.25 06/24/09 80.08 78.52
5,550.19 09110/09 72.14 70.58
5,550.94 12/11/09 71.39 69.83
5,546.08 03/11/10 76.25 74.69
5,550.98 0511 1110 71.35 69.79
5,548.33 09/29/10 74.00 72.44
Water Levels and Data over Time
White Mesa Mill -Well MW -4A
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD~ (MP) Riser (L) Monitorin~ ~blw.MP) (blw.LSD) Well
5,620.51 5,622.31 1.80 121.33
5,560.53 8/23/02 61.78 59.98
5,560.76 9111/02 61.55 59.75
5,560.96 10/23/02 61.35 59.55
5,561.00 11/22/02 61.31 59.51
5,561.19 12/3/02 61.12 59.32
5,561.46 1/9/03 60.85 59.05
5,561.48 2112/03 60.83 59.03
5,561.96 3126103 60.35 58.55
5,561.94 4/2/03 60.37 58.57
5,536.88 5/1/03 85.43 83.63
5,529.35 6/9/03 92 .96 9l.l6
5,535.54 717103 86.77 84.97
5,534.74 8/4/03 87.57 85.77
5,536.74 9/11103 85.57 83.77
5,540.24 10/2/03 82.07 80.27
5,536.13 1117103 86.18 84.38
5,550.77 12/3/03 71.54 69.74
5,557.67 1115/04 64.64 62.84
5,558.87 2110104 63.44 61.64
5,560.16 3/28/04 62.15 60.35
5,560.63 4112/04 61.68 59.88
5,561.14 5/13/04 61.17 59.37
5,561.56 6118/04 60.75 58.95
5,561.95 7/28/04 60.36 58.56
5,529.25 8/30/04 93.06 91.26
5,536.63 9116104 85.68 83.88
5,529.08 10111104 93.23 91.43
5,541.63 11116104 80.68 78.88
5,541.20 12/22/04 8l.l1 79.31
5,540.67 1118/05 81.64 79.84
5,543.45 2/28/05 78.86 77.06
5,537.99 3115/05 84.32 82.52
5,549.27 4/26105 73.04 71.24
5,545.08 5/24/05 77.23 75.43
5,544.94 6/30105 77.37 75.57
5,544.71 7/29/05 77.60 75.80
5,545.23 9112/05 77.08 75.28
5,545.00 9/27/05 77.31 75.51
5,537.45 1217105 84.86 83.06
5,546.86 3/8/06 75.45 73.65
5,546.66 6/13/06 75.65 73.85
5,545.63 7118/06 76.68 74.88
5,546.18 1117106 76.13 74.33
Water Levels and Data over Time
White Mesa Mill -Well MW-4A
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (bhv.LSD) Well
5,620.5l 5,622.3 1 1.80 12 1.33
5,545.30 2/27/07 77.01 75.2 1
Water Levels and Data over Time
White Mesa Mill -Well TW 4-1
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL~ (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
z 5,620.77 5,622.33 1.02 111.04
5,540.98 11108/99 81.35 80.33
5,541.13 11109/99 81.20 80.18
5,541.23 01102/00 81.10 80.08
5,541.23 01110/00 81.10 80.08
5,540.98 01117/00 81.35 80.33
5,541.03 01124/00 81.30 80.28
5,541.03 02/01/00 81.30 80.28
5,540.93 02/07/00 81.40 80.38
5,54l.23 02114/00 81.10 80.08
5,541.23 02/23/00 81.10 80.08
5,541.33 03/01100 81.00 79.98
5,541.43 03/08/00 80.90 79.88
5,541.73 03/15/00 80.60 79.58
5,541.43 03/20/00 80.90 79.88
5,541.43 03/29/00 80.90 79.88
5,54l.l8 04/04/00 81.15 80.13
5,540.93 04/13/00 81.40 80.38
5,541.23 04/2 1/00 81.10 80.08
5,541.43 04/28/00 80.90 79.88
5,541.33 05/01100 81.00 79.98
5,541.63 05/11100 80.70 79.68
5,541.33 05/15/00 81.00 79.98
5,541.63 OS/25/00 80.70 79.68
5,541.63 06/09/00 80.70 79.68
5,541.65 06/16/00 80.68 79.66
5,541.63 06/26/00 80.70 79.68
5,54l.85 07/06/00 80.48 79.46
5,541.79 07/13/00 80.54 79.52
5,541.91 07/18/00 80.42 79.40
5,542.17 07/27/00 80.16 79.14
5,542.31 08/02/00 80.02 79.00
5,542.43 08/09/00 79.90 78.88
5,542.41 08115/00 79.92 78.90
5,542.08 08/31/00 80.25 79.23
5,542.93 09/01 /00 79.40 78.38
5,542.87 09/08/00 79.46 78.44
5,543.09 09/13/00 79.24 78.22
5,543.25 09/20/00 79.08 78.06
5,543.44 10/05/00 78.89 77.87
5,544.08 11109/00 78.25 77.23
5,544.49 12/06/00 77.84 76.82
5,546.14 01114/01 76.19 75.17
5,547.44 02/02/01 74.89 73.87
Water Levels and Data over Time
White Mesa Mill -Well TW 4-1
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD~ Well
z 5,620.77 5,622.33 1.02 111.04
5,548.71 03/29/01 73.62 72.60
5,549.20 04/30101 73.13 72.11
5,549.64 05/31101 72.69 71.67
5,549.94 06/22/01 72.39 71.37
5,550.25 07110101 72.08 71.06
5,550.93 08/10101 71.40 70.38
5,551.34 09/19/01 70.99 69.97
5,551.59 10102/01 70.74 69.72
5,549.64 05/31/01 72.69 71.67
5,549.94 06/21/01 72.39 71.37
5,550.25 07110101 72.08 71.06
5,550.93 08/20101 71.40 70.38
5,551.34 09/19/01 70.99 69.97
5,551.59 10102/01 70.74 69.72
5,551.87 11108/01 70.46 69.44
5,552.40 12/03/01 69.93 68.91
5,552.62 01103/02 69.71 68.69
5,553.12 02/06/02 69.21 68.19
5,553.75 03/26/02 68.58 67.56
5,553.97 04/09102 68.36 67.34
5,554.56 05/23/02 67.77 66.75
5,554.54 06/05/02 67.79 66.77
5,554.83 07/08/02 67.50 66.48
5,555.29 08/23/02 67.04 66.02
5,555.54 09111102 66.79 65.77
5,555.94 10/23/02 66.39 65.37
5,556.02 11122/02 66.31 65.29
5,556.23 12/03/02 66.10 65.08
5,556.49 01109103 65.84 64.82
5,556.67 02112/03 65.66 64.64
5,557.15 03/26/03 65.18 64.16
5,557.23 04/02/03 65.10 64.08
5,556.07 05/01/03 66.26 65.24
5,554.28 06/09/03 68.05 67.03
5,553.84 07/07/03 68.49 67.47
5,553.39 08/04/03 68.94 67.92
5,553.06 09/11103 69.27 68.25
5,553.33 10/02/03 69.00 67.98
5,553.25 11107/03 69.08 68.06
5,553.82 12/03/03 68.51 67.49
5,555.61 01115/04 66.72 65.70
5,556.32 02110104 66.01 64.99
5,557.38 03/28/04 64.95 63.93
Water Levels and Data over Time
White Mesa Mill -Well TW 4-1
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD} Well
z 5,620.77 5,622.33 1.02 111.04
5,557.79 04112/04 64.54 63.52
5,558.35 05113/04 63.98 62.96
5,560.03 06/18/04 62.30 61.28
5,560.36 07/28/04 61.97 60.95
5,557.96 08/30104 64.37 63.35
5,557.24 09/16/04 65.09 64.07
5,556.28 10111/04 66.05 65.03
5,556.17 11116/04 66.16 65.14
5,556.21 12/22/04 66.12 65.10
5,555.82 01118/05 66.51 65.49
5,555.96 02/28/05 66.37 65.35
5,556.01 03115/05 66.32 65.30
5,556.05 04/26/05 66.28 65.26
5,556.00 05/24/05 66.33 65.31
5,555.97 06/30/05 66.36 65.34
5,555.90 07/29/05 66.43 65.41
5,556.22 09112/05 66.11 65.09
5,556.25 12/07/05 66.08 65.06
5,556.71 03/08/06 65.62 64.60
5,556.98 06114/06 65.35 64.33
5,560.95 07/18/06 61.38 60.36
5,557.07 11107/06 65.26 64.24
5,558.10 02/27/07 64.23 63.21
5,557.82 05102/07 64.51 63.49
5,557.82 08114/07 64.51 63.49
5,557.63 10110107 64.70 63.68
5,559.48 03/26/08 62.85 61.83
5,560.35 06/24/08 61.98 60.96
5,560.58 08/26/08 61.75 60.73
5,560.62 10/14/08 61.71 60.69
5,560.65 03110/09 61.68 60.66
5,560.66 06/24/09 61.67 60.65
5,560.36 09/10/09 61.97 60.95
5,560.53 12111109 61.8 60.78
5,560.50 03/11110 61.83 60.81
5,559.94 05/11110 62.39 61.37
5,559.01 09/29110 63.32 62.30
Water Levels and Data over Time
White Mesa Mill -Well TW 4-2
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD} Well
5,623.10 5,625.00 1.90 121.125
5,548.85 11108/99 76.15 74.25
5,548.85 11109/99 76.15 74.25
5,548.60 01102/00 76.40 74.50
5,548.80 01110/00 76.20 74.30
5,548.60 01117/00 76.40 74.50
5,549.00 01124/00 76.00 74.10
5,548.90 02/01100 76.10 74.20
5,548.90 02/07/00 76.10 74.20
5,549.30 02/14/00 75.70 73.80
5,549.40 02/23/00 75.60 73.70
5,549.50 03/01100 75.50 73.60
5,549.60 03/08/00 75.40 73.50
5,549.50 03/15/00 75.50 73.60
5,550.20 03/20/00 74.80 72.90
5,550.00 03/29/00 75.00 73.10
5,549.70 04/04/00 75.30 73.40
5,549.80 04/13/00 75.20 73.30
5,550.00 04/21/00 75.00 73.10
5,550.10 04/28/00 74.90 73.00
5,550.10 05/01/00 74.90 73.00
5,550.40 05/11/00 74.60 72.70
5,550.10 05/15/00 74.90 73.00
5,550.40 OS/25/00 74.60 72.70
5,550.40 06/09/00 74.60 72.70
5,550.50 06/16/00 74.50 72.60
5,550.35 06/26/00 74.65 72.75
5,550.45 07/06/00 74.55 72.65
5,550.45 07/13/00 74.55 72.65
5,550.46 07/18/00 74.54 72.64
5,550.61 07/27/00 74.39 72.49
5,550.66 08/02/00 74.34 72.44
5,550.68 08/09/00 74.32 72.42
5,550.70 08/15/00 74.30 72.40
5,550.82 08/31/00 74.18 72.28
5,551.15 09/08/00 73.85 7l.95
5,55l.25 09/13/00 73.75 7l.85
5,551.32 09/20/00 73.68 7l.78
5,546.11 10/05/00 78.89 76.99
5,546.75 11/09/00 78.25 76.35
5,547.16 12/06/00 77.84 75.94
5,552.46 01126/01 72.54 70.64
5,552.48 02/02/01 72.52 70.62
5,551.38 03/29/01 73.62 7l.72
Water Levels and Data over Time
White Mesa Mill -Well TW 4-2
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,623.10 5,625.00 1.90 121.125
5,551.87 04/30101 73.13 71.23
5,552.31 05/3l/01 72.69 70.79
5,552.61 06/21101 72.39 70.49
5,552.92 07110101 72.08 70.18
5,553.60 08/20101 71.40 69.50
5,554.01 09/19/01 70.99 69.09
5,554.26 10102/01 70.74 68.84
5,554.42 11108/01 70.58 68.68
5,555.07 12/03/01 69.93 68.03
5,555.02 01103/02 69.98 68.08
5,555.19 02/06102 69.81 67.91
5,555.43 03/26/02 69.57 67.67
5,555.67 04/09/02 69.33 67.43
5,556.01 05/23/02 68.99 67.09
5,556.07 06/05102 68.93 67.03
5,556.19 07/08/02 68.81 66.91
5,556.32 08/23/02 68.68 66.78
5,556.53 09111102 68.47 66.57
5,557.00 10/23/02 68.00 66.10
5,556.70 1l/22/02 68.30 66.40
5,557.29 12/03/02 67.71 65.81
5,557.48 01109/03 67.52 65.62
5,557.63 02112/03 67.37 65.47
5,558.11 03/26103 66.89 64.99
5,558.15 04/02/03 66.85 64.95
5,553.99 05101103 71.01 69.11
5,549.26 06109/03 75.74 73.84
5,548.42 07/07/03 76.58 74.68
5,548.03 08/04/03 76.97 75.07
5,547.50 09111103 77.50 75.60
5,547.96 10102/03 77.04 75.14
5,547.80 11107/03 77.20 75.30
5,548.57 12/03/03 76.43 74.53
5,554.28 01115104 70.72 68.82
5,555.74 02110104 69.26 67.36
5,557.18 03/28/04 67.82 65.92
5,557.77 04112/04 67.23 65.33
5,558.35 05113/04 66.65 64.75
5,558.47 06118/04 66.53 64.63
5,559.28 07/28/04 65.72 63.82
5,554.54 08/30104 70.46 68.56
5,552.25 09116104 72.75 70.85
5,549.93 10/11104 75.07 73.17
Water Levels and Data over Time
White Mesa Mill -Well TW 4-2
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,623.10 5,625.00 1.90 121.125
5,550.17 11116/04 74.83 72.93
5,550.65 12/22/04 74.35 72.45
5,550.23 01/18/05 74.77 72.87
5,550.37 02/28/05 74.63 72.73
5,550.41 03 /1 5/05 74.59 72.69
5,550.46 04/26/05 74.54 72.64
5,550.60 05/24/05 74.40 72.50
5,550.49 06/30105 74.51 72.61
5,550.39 07/29/05 74.61 72.71
5,550.61 09/12/05 74.39 72.49
5,550.57 12/07/05 74.43 72.53
5,551.58 03/08/06 73.42 71.52
5,551.70 06114/06 73.3 71.40
5,550.80 07118/06 74.20 72.30
5550.80 11/07/06 74.20 72.30
5553.17 02/27/07 71.83 69.93
5,552.34 05/02/07 72.66 70.76
5,552.30 08114/07 72.7 70.80
5,552.48 10110107 72.52 70.62
5,554.86 03/26/08 70.14 68.24
5,555.51 06/24/08 69.49 67.59
5,555.57 08/26/08 69.43 67.53
5,555.71 10/14/08 69.29 67.39
5,556.01 03110109 68.99 67.09
5,556.53 06/24/09 68.47 66.57
5,556.22 09/10109 68.78 66.88
5,556.81 1211 1/09 68.19 66.29
5,558.15 03/1111 0 66.85 64.95
5,557.91 05/11110 67.09 65.19
5,557.52 09/29/10 67.48 65.58
Water Levels and Data over Time
White Mesa Mill -Well TW 4-3
Total or
Measuring Measured Total
Water Land Point Depth to Depth to
Elevation Surface Elevation Length Of Date Of Water Water
{z) (LSD) (MP) Riser (L) Monitorin~ (blw.MP) (blw.LSD) Total DeEth Of Well
5,631.21 5,632.23 1.02 141
5,565.78 11129/99 66.45 65.43
5,566.93 01/02/00 65.30 64.28
5,567.03 01110/00 65.20 64.18
5,566.83 01117/00 65.40 64.38
5,567.13 01124/00 65.10 64.08
5,567.33 02/01100 64.90 63.88
5,567.13 02/07/00 65.10 64.08
5,567.43 02114/00 64.80 63.78
5,567.63 02/23/00 64.60 63.58
5,567.73 03/01100 64.50 63.48
5,567.83 03/08/00 64.40 63.38
5,567.70 03115/00 64.53 63.51
5,568.03 03/20/00 64.20 63.18
5,567.93 03/29/00 64.30 63.28
5,567.63 04/04/00 64.60 63.58
5,567.83 04113/00 64.40 63.38
5,568.03 04/21/00 64.20 63.18
5,568.23 04/28/00 64.00 62.98
5,568.13 05/01100 64.10 63.08
5,568.53 05111100 63.70 62.68
5,568.23 05115/00 64.00 62.98
5,568.53 OS/25/00 63.70 62.68
5,568.61 06/09/00 63.62 62.60
5,568.69 06116/00 63:54 62.52
5,568.45 06/26/00 63.78 62.76
5,568.61 07/06/00 63.62 62.60
5,568.61 07/06/00 63.62 62.60
5,568.49 07/13/00 63.74 62.72
5,568.55 07118/00 63.68 62.66
5,568.65 07/27/00 63.58 62.56
5,568.73 08/02/00 63.50 62.48
5,568.77 08/09/00 63.46 62.44
5,568.76 08116/00 63.47 62.45
5,568.95 08/31/00 63.28 62.26
5,568.49 09/08/00 63.74 62.72
5,568.67 09113/00 63.56 62.54
5,568.96 09/20/00 63.27 62.25
5,568.93 10105/00 63.3 62.28
5,569.34 11/09100 62.89 61.87
5,568.79 12/06/00 63.44 62.42
5,569.11 01/03/01 63.12 62.10
5,569.75 02/09/01 62.48 61.46
5,570.34 03/28/01 61.89 60.87
Water Levels and Data over Time
White Mesa Mill -Well TW 4-3
Total or
Measuring Measured Total
Water Land Point Depth to Depth to
Elevation Surface Elevation Length Of Date Of Water Water
(z) (LSD) (MP) Riser ~L) Monitoring (blw.MP) (blw.L D) Total Oe~th Of Well
5,631.21 5,632.23 1.02 141
5,570.61 04/30/01 61.62 60.60
5,570.70 05/31/01 61.53 60.51
5,570.88 06/21/01 61.35 60.33
5,571.02 07110/01 61.21 60.19
5,571.70 08/20/01 60.53 59.51
5,572.12 09119101 60.11 59.09
5,572.08 10102/01 60.15 59.13
5,570.70 05/31/01 61.53 60.51
5,570.88 06/21/01 61.35 60.33
5,571.02 07110101 61.21 60.19
5,571.70 08/20/01 60.53 59.51
5,572.12 09119101 60.11 59.09
5,572.08 10102/01 60.15 59.13
5,572.78 11/08/01 59.45 58.43
5,573.27 12/03/01 58.96 57.94
5,573.47 01/03/02 58.76 57.74
5,573.93 02/06/02 58.30 57.28
5,574.75 03/26/02 57.48 56.46
5,574.26 04/09102 57.97 56.95
5,575.39 05/23/02 56.84 55.82
5,574.84 06/05/02 57.39 56.37
5,575.33 07/08/02 56.90 55.88
5,575.79 08/23/02 56.44 55.42
5,576.08 09111102 56.15 55.13
5,576.30 10/23/02 55.93 54.91
5,576.35 11122/02 55.88 54.86
5,576.54 12/03/02 55.69 54.67
5,576.96 01109/03 55.27 54.25
5,577.11 02/12/03 55.12 54.10
5,577.61 03/26/03 54.62 53.60
5,572.80 04/02/03 59.43 58.41
5,577.89 05/01/03 54.34 53.32
5,577.91 06/09103 54.32 53.30
5,577.53 07/07/03 54.70 53.68
5,577.50 08/04/03 54.73 53.71
5,577.71 09/11/03 54.52 53.50
5,577.31 10/02/03 54.92 53.90
5,577.33 11107/03 54.90 53.88
5,577.34 12/03/03 54.89 53.87
5,578.24 01115/04 53.99 52.97
5,578.38 02110104 53.85 52.83
5,578.69 03/28/04 53.54 52.52
5,579.15 04112/04 53.08 52.06
Water Levels and Data over Time
White Mesa Mill -Well TW 4-3
Total or
Measuring Measured Total
Water Land Point Depth to Depth to
Elevation Surface Elevation Length Of Date Of Water Water
(z) (LSD) (MP) Riser (L) Monjtoring (blw.MP) (blw.LSD) Total De~th Of Well
5,631.21 5,632.23 1.02 14 1
5,579.47 05/13/04 52.76 51.74
5,579.53 06/18/04 52.70 51.68
5,580.17 07/28/04 52.06 51 .04
5,580.20 08/30/04 52.03 51.01
5,580.26 09116/04 51.97 50.95
5,580.12 10/11104 52.11 51.09
5,579.93 11116/04 52.30 51.28
5,580.07 12122/04 52.16 51.14
5,579.80 01118/05 52.43 51.41
5,580.35 02/28/05 51.88 50.86
5,580.57 03115105 51.66 50.64
5,580.86 04/26/05 51.37 50.35
5,581.20 05/24/05 51.03 50.01
5,581.51 06/30/05 50.72 49.70
5,581.55 07 /29/05 50.68 49.66
5,581 .68 09112/05 50.55 49 .53
5,581.83 12/07/05 50.4 49.38
5,564.92 03 /08/06 67.31 66.29
5,582.73 06113/06 49.50 48.48
5,582.33 07/18/06 49.90 48.88
5,582.75 11107/06 49.48 48.46
5583.35 02/27/07 48.88 47.86
5,559.57 05102/07 72.66 71.64
5,583.29 08/1 4/07 48.94 47.92
5,583.49 10/10/07 48.74 47.72
5,584.95 03/26/08 47.28 46.26
5,584.59 06/24/08 47.64 46.62
5,584.55 08/26/08 47.68 46.66
5,584.03 10/14/08 48.2 47.18
5,583.64 03/03/09 48.59 47.57
5,587.34 06/24/09 44.89 43 .87
5,582.90 09110/09 49.33 48.31
5,583.27 12111109 48.96 47.94
5,583.63 03/11110 48.6 47.58
5,583.82 05111 /10 48.41 47.39
5,583 .51 09/29110 48.72 47.70
Water Levels and Data over Time
White Mesa Mill -Well TW 4-4
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (M_P) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,612.301 5,613.485 1.184 114.5
5,512.145 05/25100 101.34 100.16
5,518.985 06/09/00 94.50 93.32
5,512.145 06116/00 101.34 100.16
5,517.465 06/26/00 96.02 94.84
5,520.145 07/06/00 93.34 92.16
5,521.435 07/13/00 92.05 90.87
5,522.005 07118/00 91.48 90.30
5,522.945 07127/00 90.54 89.36
5,523.485 08/02/00 90.00 88.82
5,523.845 08/09/00 89.64 88.46
5,523.885 08115100 89.60 88.42
5,524.555 09/01100 88.93 87.75
5,5l3.235 09/08/00 100.25 99.07
5,516.665 09/13/00 96.82 95.64
5,519.085 09/20100 94.40 93.22
5,522.165 10105/00 91.32 90.14
5,524.665 11/09/00 88.82 87.64
5,518.545 12/06/00 94.94 93.76
5,527.695 01103/01 85.79 84.61
5,529.085 02/09/01 84.40 83.22
5,529.535 03/27/01 83.95 82.77
5,530.235 04/30101 83.25 82.07
5,530.265 05131101 83.22 82.04
5,534.405 06122/01 79.08 77.90
5,533.145 07110101 80.34 79.16
5,534.035 08/20101 79.45 78.27
5,534.465 09119101 79.02 77.84
5,533.285 10102/01 80.20 79.02
5,530.265 05/31101 83.22 82.04
5,534.405 06/21/01 79.08 77.90
5,533.145 07110101 80.34 79.16
5,534.035 08/20101 79.45 78.27
5,534.465 09/19101 79.02 77.84
5,533.285 10/02/01 80.20 79.02
5,533.865 11108/01 79.62 78.44
5,534.275 12/03/01 79.21 78.03
5,534.715 01/03/02 78.77 77.59
5,535.435 02/06102 78.05 76.87
5,536.445 03/26/02 77.04 75.86
5,536.405 04/09102 77.08 75.90
5,537.335 05/23/02 76.15 74.97
5,537.325 06/05102 76.16 74.98
5,537.975 07/08/02 75.51 74.33
Water Levels and Data over Time
White Mesa Mill -Well TW 4-4
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (bhv.MP) (blw.LSD~ Well
5,612.301 5,6l3.485 1.184 114.5
5,538.825 08/23/02 74.66 73.48
5,539.275 09111/02 74.21 73.03
5,539.765 10/23/02 73.72 72.54
5,540.205 11/22/02 73.28 72.10
5,540.295 12/03/02 73.19 72.01
5,540.795 01109103 72.69 71.51
5,540.985 02112/03 72.50 71.32
5,541.675 03/26/03 71.81 70.63
5,541.765 04/02/03 71.72 70.54
5,541.885 05101103 71.60 70.42
5,542.025 06/09103 71.46 70.28
5,541.925 07/07/03 71.56 70.38
5,541.885 08/04/03 71.60 70.42
5,541.825 09111/03 71.66 70.48
5,541.885 10102/03 71.60 70.42
5,541.995 11/07/03 71.49 70.31
5,542.005 12/03/03 71.48 70.30
5,542.555 01115104 70.93 69.75
5,542.705 02110104 70.78 69.60
5,543.225 03/28/04 70.26 69.08
5,543.555 04/12/04 69.93 68.75
5,543.865 05/13/04 69.62 68.44
5,543.915 06/18/04 69.57 68.39
5,544.655 07/28/04 68.83 67.65
5,544.795 08/30104 68.69 67.51
5,544.845 09116/04 68.64 67.46
5,544.705 10111104 68.78 67.60
5,544.525 11116/04 68.96 67.78
5,544.625 12/22/04 68.86 67.68
5,544.305 01118/05 69.18 68.00
5,544.585 02/28/05 68.90 67.72
5,544.685 03/15105 68.80 67.62
5,544.675 04/26/05 68.81 67.63
5,544.785 05/24/05 68.70 67.52
5,544.795 06/30105 68.69 67.51
5,544.775 07/29105 68.71 67.53
5,545.005 09112/05 68.48 67.30
5,545.225 12/07/05 68.26 67.08
5,545.735 03/08/06 67.75 66.57
5,545.785 06114/06 67.70 66.52
5,545.855 07118/06 67.63 66.45
5,545.805 11107/06 67.68 66.50
5546.675 02/27/07 66.81 65.63
Water Levels and Data over Time
White Mesa Mill -Well TW 4-4
Totar or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) ~LSD) (MP) Riser (L) Monitoring (bhv.MP) (blw.LSD} Well
5612.301 5613.485 1.184 114.5
5,546.535 05102/07 66.95 65.77
5,547.155 08115/07 66.33 65.15
5,547.2 15 10/.1 0/07 66.27 65.09
5,548.305 03/26/08 65.18 64.00
5548.865 06/24/08 64.62 63.44
5549.235 08/26/08 64.25 63.07
5,549.305 10114/08 64.18 63.00
5,549.725 03/03/09 63.76 62.58
5,549.905 06/24/09 63 .58 62.40
5549.695 09/10/09 63.79 62.61
5549.865 12111109 63.62 62.44
5,545.60 03/11 /1.0 67.89 66.71
5,530.88 0511111 0 82.61 81.43
5,545.24 09/29/10 68.25 67.07
Water Levels and Data over Time
White Mesa Mill -Well TW 4-5
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitorin~ (blw.MP) (blw.LSD) Well
5,638.75 5,640.70 1.95 121.75
5,579.30 01/02/00 61.40 59.45
5,579.60 01110/00 61.10 59.15
5,579.35 01117/00 61.35 59.40
5,579.60 01124/00 61.10 59.15
5,579.50 02/01100 61.20 59.25
5,579.50 02/07/00 61.20 59.25
5,579.90 02114/00 60.80 58.85
5,579.90 02/23/00 60.80 58.85
5,580.20 03/01100 60.50 58.55
5,580.00 03/08/00 60.70 58.75
5,580.04 031I5/00 60.66 58.71
5,580.70 03/20/00 60.00 58.05
5,580.30 03/29/00 60.40 58.45
5,580.00 04/04/00 60.70 58.75
5,580.20 04/13/00 60.50 58.55
5,580.40 04/21100 60.30 58.35
5,580.50 04/28/00 60.20 58.25
5,580.50 05/01/00 60.20 58.25
5,580.90 05/11/00 59.80 57.85
5,580.50 05115/00 60.20 58.25
5,580.75 OS/25/00 59.95 58.00
5,580.80 06/09/00 59.90 57.95
5,580.92 06116/00 59.78 57.83
5,580.80 06/26/00 59.90 57.95
5,580.90 07/06/00 59.80 57.85
5,581.05 07113/00 59.65 57.70
5,580.90 07118/00 59.80 57.85
5,581.05 07/27/00 59.65 57.70
5,581.06 08/02/00 59.64 57.69
5,581.08 08/09/00 59.62 57.67
5,581.07 08116/00 59.63 57.68
5,581.25 08/31100 59.45 57.50
5,581.32 09/08/00 59.38 57.43
5,581.34 09113/00 59.36 57.41
5,581.41 09/20/00 59.29 57.34
5,581.37 10/05/00 59.33 57.38
5,581.66 11/09/00 59.04 57.09
5,581.63 12/06/00 59.07 57.12
5,581.92 01/03/01 58.78 56.83
5,582.20 02/09/01 58.50 56.55
5,582.54 03/28/01 58.16 56.21
5,582.72 04/30/01 57.98 56.03
5,582.72 05/31/01 57.98 56.03
Water Levels and Data over Time
White Mesa Mill -Well TW 4-5
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) {LSD) (MP) Riser (L~ Monitorin~ (blw.MP) (blw.LSD) Well
5,638.75 5,640.70 1.95 121.75
5,582.81 06/22/01 57.89 55.94
5,582.92 07110101 57.78 55.83
5,583.17 08/20101 57.53 55.58
5,583.28 09/19/01 57.42 55.47
5,583.36 10/02/01 57.34 55.39
5,582.72 05/31/01 57.98 56.03
5,582.81 06/21101 57.89 55.94
5,582.92 07/10101 57.78 55.83
5,583.17 08/20/01 57.53 55.58
5,583.28 09119/01 57.42 55.47
5,583.36 10/02/01 57.34 55.39
5,583.49 11/08/01 57.21 55.26
5,583.84 12/03/01 56.86 54.91
5,583.79 01103/02 56.91 54.96
5,583.96 02/06/02 56.74 54.79
5,584.39 03/26/02 56.31 54.36
5,584.12 04/09/02 56.58 54.63
5,584.55 05/23/02 56.15 54.20
5,584.42 06/05/02 56.28 54.33
5,583.65 07/08/02 57.05 55.10
5,584.90 08/23/02 55.80 53.85
5,585.02 09111/02 55.68 53.73
5,585.20 10/23/02 55.50 53.55
5,585.15 11122/02 55.55 53.60
5,585.42 12/03/02 55.28 53.33
5,585.65 01/09/03 55.05 53.10
5,585.65 02/12/03 55.05 53.10
5,585.92 03/26/03 54.78 52.83
5,586.22 04/02/03 54.48 52.53
5,586.01 05/01103 54.69 52.74
5,584.81 06/09/03 55.89 53.94
5,584.34 07/07/03 56.36 54.41
5,584.40 08/04/03 56.30 54.35
5,583.88 09/11103 56.82 54.87
5,583.57 10102/03 57.13 55.18
5,583.39 11/07/03 57.31 55.36
5,583.97 12/03/03 56.73 54.78
5,585.28 01115/04 55.42 53.47
5,585.50 02110/04 55.20 53.25
5,585.87 03/28/04 54.83 52.88
5,586.20 04/12/04 54.50 52.55
5,586.45 05/13/04 54.25 52.30
5,586.50 06/18/04 54.20 52.25
Water Levels and Data over Time
White Mesa Mill -Well TW 4-5
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) MonitorinG (blw.MP) (blw.LSD) Well
5,638.75 5,640.70 1.95 121.75
5,587.13 07/28/04 53.57 51.62
5,586.22 08/30104 54.48 52.53
5,585.69 09/16/04 55.01 53.06
5,585.17 10111104 55.53 53.58
5,584.64 11116/04 56.06 54.11
5,584.77 12/22/04 55.93 53.98
5,584.65 01118/05 56.05 54.10
5,584.98 02/28/05 55.72 53.77
5,585.15 03/15/05 55.55 53.60
5,586.25 04/26/05 54.45 52.50
5,586.79 05/24/05 53.91 51.96
5,586.52 06/30105 54.18 52.23
5,586.03 07/29/05 54.67 52.72
5,586.05 09/12/05 54.65 52.70
5,585.80 12/07/05 54.90 52.95
5,587.06 03/08/06 53.64 51.69
5,585.90 06113/06 54.80 52.85
5,585.32 07/18/06 55.38 53.43
5,585.35 11107/06 55.35 53.40
5585.81 02/27/07 54.89 52.94
5,585.20 05102/07 55.50 53.55
5,586.66 08114/07 54.04 52.09
5,586.80 10/10107 53.90 51.95
5,588.48 03126/08 52.22 50.27
5,586.51 06/24/08 54.19 52.24
5,586.45 08/26/08 54.25 52.30
5,585.40 10/14/08 55.3 53.35
5,584.80 03 /03/09 55.9 53.95
5,584.73 06/24/09 55.97 54.02
5,584.36 09110109 56.34 54.39
5,585.02 12/11109 55.68 53.73
5,585.66 03111110 55.04 53.09
5,584.86 05/11 /10 55.84 53.89
5,584.55 09129110 56.15 54.20
Water Levels and Data over Time
White Mesa Mill -Well TW 4-6
Total or
Measuring Measured Total Total
Water Land Point Depth to Depth to Depth Of
Elevation Surface Elevation Length Of Date Of Water Water Well
(z) (LSD) (MP) Riser (L) M.onitoring (blw.MP) (blw.L D~ (blw.LSD2
5,607.33 5,608.78 1.450 98.55
5,522.28 OS/25/00 86.50 85.05
5,521.51 06/09/00 87.27 85.82
5,522.35 06/16/00 86.43 84.98
5,522.14 06/26/00 86.64 85.19
5,522.25 07/06/00 86.53 85.08
5,522.13 07/13/00 86.65 85.20
5,522.17 07/18/00 86.61 85.16
5,522.26 07/25/00 86.52 85.07
5,522.31 08/02/00 86.47 85.02
5,522.33 08/09/00 86.45 85.00
5,522.35 08/15/00 86.43 84.98
5,522.40 08/31/00 86.38 84.93
5,522.40 09/08/00 86.38 84.93
5,522.45 09/13/00 86.33 84.88
5,522.53 09/20/00 86.25 84.80
5,522.39 10/05/00 86.39 84.94
5,522.42 11109/00 86.36 84.91
5,522.29 12/06/00 86.49 85.04
5,522.63 01103/01 86.15 84.70
5,522.72 02/09/01 86.06 84.61
5,522.90 03/26/01 85.88 84.43
5,522.70 04/30/01 86.08 84.63
5,522.89 05/31101 85.89 84.44
5,522.88 06/20/01 85.90 84.45
5,522.96 07/10/01 85.82 84.37
5,523.10 08/20/01 85.68 84.23
5,523.23 09/19/01 85.55 84.10
5,523.21 10/02/01 85.57 84.12
5,522.89 05/31101 85.89 84.44
5,522.88 06/21101 85.90 84.45
5,522.96 07/10/01 85.82 84.37
5,523.10 08/20/01 85.68 84.23
5,523.23 09/19/0 I 85.55 84.10
5,523.21 10/02/01 85.57 84.12
5,523.25 11108/01 85.53 84.08
5,523.46 12/03/01 85.32 83.87
5,523.36 01103/02 85.42 83.97
5,523.50 02/06/02 85.28 83.83
5,523.94 03/26/02 84.84 83.39
5,523.75 04/09/02 85.03 83.58
5,524.23 OS/23/02 84.55 83.10
5,523.98 06/05/02 84.80 83.35
5,524.31 07/08/02 84.47 83.02
Water Levels and Data over Time
White Mesa Mill -Well TW 4-6
Total or
Measuring Measured Total Total
Water Land Point Depth to Depth to Depth Of
Elevation Surface Elevation Length Of Date Of Water Water Well
(z) (LSD) (MP) Riser ~L) Monitoring (blw.MP) (blw.LSD) (blw.LSD)
5,607.33 5,608.78 1.450 98.55
5,524.36 08/23/02 84.42 82.97
5,524.49 09111102 84.29 82.84
5,524.71 10/23/02 84.07 82.62
5,524.60 11122/02 84.18 82.73
5,524.94 12/03/02 83.84 82.39
5,525.10 01109103 83.68 82.23
5,525.15 02112/03 83.63 82.18
5,525.35 03/26/03 83.43 81.98
5,525.68 04/02/03 83.lO 81.65
5,525.74 05/01/03 83.04 81.59
5,525.98 06109103 82.80 81.35
5,526.04 07/07/03 82.74 81.29
5,526.07 08/04/03 82.71 81.26
5,526.42 09/11/03 82.36 80.91
5,526.30 10/02/03 82.48 81.03
5,526.41 11/07/03 82.37 80.92
5,526.46 12/03/03 82.32 80.87
5,526.83 01115/04 81.95 80.50
5,526.81 02110/04 81.97 80.52
5,527.14 03/28/04 81.64 80.19
5,527.39 04112/04 81.39 79.94
5,527.64 05113/04 81.14 79.69
5,527.70 06/18/04 8l.08 79.63
5,528.16 07/28/04 80.62 79.17
5,528.30 08/30104 80.48 79.03
5,528.52 09116/04 80.26 78.81
5,528.71 10111/04 80.07 78.62
5,528.74 11116/04 80.04 78.59
5,529.20 12/22/04 79.58 78.13
5,528.92 01118/05 79.86 78.41
5,529.51 02/28/05 79.27 77.82
5,529.74 03115/05 79.04 77.59
5,529.96 04/26/05 78.82 77.37
5,530.15 05/24/05 78.63 77.18
5,530.35 06/30105 78.43 76.98
5,530.47 07/29105 78.31 76.86
5,530.95 09112/05 77.83 76.38
5,531.50 12/07/05 77.28 75.83
5,532.43 03/08/06 76.35 74.90
5,533.49 06/13/06 75.29 73.84
5,532.58 07/18/06 76.20 74.75
5,532.88 11/07/06 75.90 74.45
5534.09 02/27/07 74.69 73.24
Water Levels and Data over Time
White Mesa Mill-Well TW4-6
Total or
Measuring Measured Total Total
Water Land Point Depth to Deptb to Deptb Of
Elevation Surface Elevation Length Of Date Of Water Water Well
(z) (LSD) (MP) Riser (L} Monitoring (blw.MP) (blw.LSD) (blw.L D)
5,607.33 5,608.78 1.450 98.55
5,534.04 05/02/07 74.74 73.29
5,534.43 08/14/07 74.35 72.90
. 5,554.54 10110/07 54.24 52.79
5,535.40 03126/08 73.38 71 .93
5,535.55 06124/08 73.23 71.78
5535.90 08/26/08 72.88 71 .43
5535.87 10/14/08 72 .91 71.46
5536.42 03/10/09 72 .36 70.91
5,536.71 06124/09 72.07 70.62
5,536.83 09/10/09 71.95 70.50
5,537.35 1211 1/09 71.43 69.98
5,537.93 03111 /10 70.85 69.40
5,538,14 05/11110 70.64 69.19
538.03 09/29/10 70.75 69.30
Water Levels and Data over Time
White Mesa Mill -Well TW 4-7
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total Depth
Elevation Surface Elevation Length Of Date Of Water Water Of Well
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) (blw.LSD)
5,619.87 5,621.07 1.20 119.8
5,552.37 11129/99 68.70 67.50
5,553.57 01102/00 67.50 66.30
5,553.87 01/10/00 67.20 66.00
5,553.72 01/17/00 67.35 66.15
5,553.97 01124/00 67.10 65.90
5,553.87 02/01100 67.20 66.00
5,553.87 02/07/00 67.20 66.00
5,554.17 02/14/00 66.90 65.70
5,554.27 02/23/00 66.80 65.60
5,554.37 03/01100 66.70 65.50
5,554.37 03/08/00 66.70 65.50
5,554.27 03/15/00 66.80 65.60
5,554.77 03/20/00 66.30 65.10
5,554.57 03/29/00 66.50 65.30
5,554.27 04/04/00 66.80 65.60
5,554.57 04/13/00 66.50 65.30
5,554.77 04/21 /00 66.30 65.10
5,554.87 04/28/00 66.20 65.00
5,554.87 05/01/00 66.20 65.00
5,555.27 05/11 /00 65.80 64.60
5,554.97 05115/00 66.10 64 .90
5,555.27 OS/25/00 65.80 64.60
5,555.33 06/09/00 65.74 64.54
5,555.45 06/16/00 65.62 64.42
5,555.22 06/26/00 65.85 64.65
5,555.45 07/06/00 65.62 64.42
5,555.40 07113/00 65 .67 64.47
5,555.45 07/18/00 65.62 64.42
5,555.59 07/27/00 65.48 64.28
5,555.65 08/02/00 65.42 64.22
5,555.70 08/09/00 65.37 64.17
5,555.74 08/16/00 65.33 64.13
5,555.96 08/31100 65.11 63.91
5,555.87 09/08/00 65.20 64.00
5,555.95 09113/00 65.12 63.92
5,556.05 09/20/00 65.02 63.82
5,556.06 10/05/00 65.01 63.81
5,556.17 10/12/00 64.90 63.70
5,556.20 10/19/00 64.87 63.67
5,556.22 10/23/00 64.85 63.65
5,556.36 11109/00 64.71 63.51
5,556.42 11114/00 64.65 63.45
5,556.45 11130/00 64.62 63.42
Water Levels and Data over Time
White Mesa Mill -Well TW 4-7
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total Depth
Elevation Surface Elevation Length Of Date Of Water Water Of Well
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) (blw.LSD)
5,619.87 5,621.07 1.20 119.8
5,556.15 12/06/00 64.92 63.72
5,556.89 01114/01 64.l8 62.98
5,557.07 02/09/01 64.00 62.80
5,557.62 03/29/01 63.45 62.25
5,557.51 04/30101 63.56 62.36
5,557.77 05/31101 63.30 62.10
5,557.84 06/21101 63.23 62.03
5,557.98 07110101 63.09 61.89
5,558.33 08/20101 62.74 61.54
5,558.57 09/19/01 62.50 61.30
5,558.53 10102/01 62.54 61.34
5,558.62 11108/01 62.45 61.25
5,559.03 12/03/01 62.04 60.84
5,559.08 01103/02 61.99 60.79
5,559.32 02/06/02 61.75 60.55
5,559.63 03/26/02 61.44 60.24
5,559.55 04/09/02 61.52 60.32
5,560.06 05/23/02 61.01 59.81
5,559.91 06/05102 61.16 59.96
5,560.09 07/08/02 60.98 59.78
5,560.01 08/23/02 61.06 59.86
5,560.23 09/11102 60.84 59.64
5,560.43 10/23/02 60.64 59.44
5,560.39 11122/02 60.68 59.48
5,560.61 12/03/02 60.46 59.26
5,560.89 01/09/03 60.18 58.98
5,560.94 02112/03 60.13 58.93
5,561.28 03/26/03 59.79 58.59
5,561.35 04/02/03 59.72 58.52
5,546.20 05101/03 74.87 73.67
5,539.47 06/09/03 81.60 80.40
5,541.87 07/07/03 79.20 78.00
5,542.12 08/04/03 78.95 77.75
5,541.91 09111103 79.16 77.96
5,544.62 10102/03 76.45 75.25
5,542.67 11107/03 78.40 77.20
5,549.96 12/03/03 71.11 69.91
5,557.17 01115104 63.90 62.70
5,558.65 02110104 62.42 61.22
5,559.90 03/28/04 61.17 59.97
5,560.36 04112/04 60.71 59.51
5,560.87 05113/04 60.20 59.00
5,560.95 06/18/04 60.12 58.92
Water Levels and Data over Time
White Mesa Mill -Well TW 4-7
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total Depth
Elevation Surface Elevation Length Of Date Of Water Water Of Well
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) (blw.LSD)
5,619.87 5,621.07 1.20 119.8
5,561.64 07/28/04 59.43 58.23
5,543.00 08/30104 78.07 76.87
5,541.91 09/16/04 79.16 77.96
5,540.08 10111104 80.99 79.79
5,546.92 11/16/04 74.15 72.95
5,546.97 12/22/04 74.10 72.90
5,546.51 01/18/05 74.56 73.36
5,546.66 02/28/05 74.41 73.21
5,546.81 03/15105 74.26 73.06
5,548.19 04/26/05 72.88 71.68
5,547.11 05/24/05 73.96 72.76
5,546.98 06/30105 74.09 72.89
5,546.92 07/29/05 74.15 72.95
5,547.26 09/12/05 73.81 72.61
5,547.26 12/07/05 73.81 72.61
5,548.86 03/08/06 72.21 71.01
5,548.62 06/13/06 72.45 71.25
5,550.04 07118/06 71.03 69.83
5,548.32 11107/06 72.75 71.55
5,550.44 02/27/07 70.63 69.43
5,549.69 05102/07 71.38 70.18
5,549.97 08114/07 71.10 69.90
5,550.30 10/10/07 70.77 69.57
5,551.92 03/26/08 69.15 67.95
5,552.94 06/24/08 68.13 66.93
5,552.34 08/26/08 68.73 67.53
5,552.61 10/14/08 68.46 67.26
5,552.81 03110109 68.26 67.06
5,553.11 06/24/09 67.96 66.76
5,552.55 09110109 68.52 67.32
5,553.06 12111109 68.01 66.81
5,554.64 03111110 66.43 65.23
5,554.20 05111110 66.87 65.67
5,553.45 09/29110 67.62 66.42
Water Levels and Data over Time
White Mesa Mill -Well TW 4-8
Total or
Measuring Measured
Water Land Point Depth to Total Depth Total
Elevation Surface Elevation Length Of Date Of Water to Water Depth Of
(WL) (LSD) (MP) Riser (L2 Monitoring (blw.MP) (blw.LSD) Well
5,616.80 5,618.21 1.41 126.00
5,543.21 11/29/99 75.00 73.59
5,543.01 01102/00 75.20 73.79
5,543.31 01110/00 74.90 73.49
5,543.11 01117/00 75.10 73.69
5,543.41 01/24/00 74.80 73.39
5,543.31 02/01100 74.90 73.49
5,543.31 02/07/00 74.90 73.49
5,543.71 02/14/00 74.50 73.09
5,543.76 02/23/00 74.45 73.04
5,543.86 03/01100 74.35 72.94
5,543.86 03/08/00 74.35 72.94
5,543.91 03/15/00 74.30 72.89
5,544.31 03/20/00 73.90 72.49
5,544.21 03/29/00 74.00 72.59
5,544.01 04/04/00 74.20 72.79
5,544.21 04/13/00 74.00 72.59
5,544.41 04/21100 73.80 72.39
5,544.51 04/28/00 73.70 72.29
5,544.51 05/01100 73.70 72.29
5,544.81 05/11100 73.40 71.99
5,544.51 05/15/00 73.70 72.29
5,544.71 OS/25/00 73.50 72.09
5,544.71 06/09/00 73.50 72.09
5,544.81 06/16/00 73.40 7l.99
5,544.68 06/26/00 73.53 72.12
5,544.76 07/06/00 73.45 72.04
5,544.77 07/13/00 73.44 72.03
5,544.76 07/18/00 73.45 72.04
5,544.92 07/27/00 73.29 71.88
5,544.96 08/02/00 73.25 71.84
5,544.98 08/09/00 73.23 71.82
5,544.97 08/15/00 73.24 71.83
5,545.21 08/31100 73.00 71.59
5,545.31 09/08/00 72.90 71.49
5,545.43 09/13/00 72.78 71.37
5,545.56 09/20/00 72.65 71.24
5,545.57 10/05/00 72.64 71.23
5,545.81 11109/00 72.40 70.99
5,545.66 12/06/00 72.55 71.14
5,546.28 01103/01 71.93 70.52
5,546.70 02/09/01 71.51 70.10
5,547.18 03/27/01 71.03 69.62
5,547.31 04/30/01 70.90 69.49
Water Levels and Data over Time
White Mesa Mill -Well TW 4-8
Total or
Measuring Measured
Water Land Point Depth to Total Depth Total
Elevation Surface Elevation Length Of Date Of Water to Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,616.80 5,618.21 1.41 126.00
5,547.49 05/31/01 70.72 69.31
5,547.49 06/20/01 70.72 69.31
5,547.83 07110/01 70.38 68.97
5,548.13 08/20/01 70.08 68.67
5,548.30 09119/01 69.91 68.50
5,548.45 10/02/01 69.76 68.35
5,547.49 05/31/01 70.72 69.31
5,547.54 06/21 /01 70.67 69.26
5,547.83 07/10/01 70.38 68.97
5,548.13 08/20/01 70.08 68.67
5,548.30 09/19/01 69.91 68.50
5,548.45 10/02/01 69.76 68.35
5,548.62 11/08/01 69.59 68.18
5,549.03 12/03/01 69.l8 67.77
5,548.97 01/03/02 69.24 67.83
5,549.19 02/06/02 69.02 67.61
5,549.66 03/26/02 68.55 67.14
5,549.64 04/09/02 68.57 67.16
5,550.01 05/23/02 68.20 66.79
5,549.97 06/05/02 68.24 66.83
5,550.13 07/08/02 68.08 66.67
5,550.30 08/23/02 67.91 66.50
5,550.50 09111/02 67.71 66.30
5,550.90 10/23/02 67.31 65.90
5,550.83 11/22/02 67.38 65.97
5,551.04 12/03/02 67.17 65.76
5,551.24 01/09/03 66.97 65.56
5,551.23 02112/03 66.98 65.57
5,551.52 03/26/03 66.69 65.28
5,551.64 04/02/03 66.57 65.16
5,549.02 05/01/03 69.19 67.78
5,544.74 06/09/03 73.47 72.06
5,543.78 07/07/03 74.43 73.02
5,543.39 08/04/03 74.82 73.41
5,543.05 09111/03 75.l6 73.75
5,543.l9 10/02/03 75.02 73.61
5,543.21 11/07/03 75.00 73.59
5,543.40 12/03/03 74.81 73.40
5,548.l0 01/15/04 70.11 68.70
5,549.50 02/10/04 68.71 67.30
5,550.87 03/28/04 67.34 65.93
5,551.33 04/12/04 66.88 65.47
5,551.87 05/13/04 66.34 64.93
Water Levels and Data over Time
White Mesa Mill -Well TW 4-8
Total or
Measuring Measured
Water Land Point Depth to Total Depth Total
Elevation Surface Elevation Length Of Date Of Water to Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,616.80 5,618.21 1.41 126.00
5,551.92 06/18/04 66.29 64.88
5,552.69 07/28/04 65.52 64.11
5,549.78 08/30104 68.43 67.02
5,547.46 09/16/04 70.75 69.34
5,545.21 10/11104 73.00 71.59
5,545.09 11116/04 73.12 71.71
5,545.61 12/22/04 72.60 71.19
5,545.24 01118/05 72.97 71.56
5,545.42 02/28/05 72.79 71.38
5,545.45 03/15105 72.76 71.35
5,545.46 04/26/05 72.75 71.34
5,545.66 05/24/05 72.55 71.14
5,545.54 06/30105 72.67 71.26
5,545.43 07/29/05 72.78 71.37
5,545.61 09/12/05 72.60 71.19
5,545.52 12/07/05 72.69 71.28
5,546.53 03/08/06 71.68 70.27
5,546.51 06/13/06 71.70 70.29
5,546.51 07118/06 71.70 70.29
5,546.46 11107/06 71.75 70.34
5,547.92 02/27/07 70.29 68.88
5,547.01 05102/07 71.20 69.79
5,547.40 08/14/07 70.81 69.40
5,547.57 10/10107 70.64 69.23
5,548.76 03/26/08 69.45 68.04
5,549.17 06/24/08 69.04 67.63
5,549.31 08/26/08 68.9 67.49
5,549.37 10/14/08 68.84 67.43
5,549.72 03/03/09 68.49 67.08
5,550.08 06/24/09 68.13 66.72
5,549.93 09/10/09 68.28 66.87
5,550.44 12111109 67.77 66.36
5,551.46 03/11/10 66.75 65.34
5,551.38 05/11110 66.83 65.42
5,551.15 09/29110 67.06 65.65
Water Levels and Data over Time
White Mesa Mill -Well TW 4-9
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,636.11 5,637.59 1.48 121.33
5,577.09 12/20199 60.5 59.02
5,577.09 01102/00 60.5 59.02
5,577.29 01110/00 60.3 58.82
5,577.09 01/17/00 60.5 59.02
5,577.39 01124/00 60.2 58.72
5,577.29 02/01100 60.3 58.82
5,577.19 02/07/00 60.4 58.92
5,577.69 02/14/00 59.9 58.42
5,577.69 02/23/00 59.9 58.42
5,577.79 03/01/00 59.8 58.32
5,577.79 03/08/00 59.8 58.32
5,577.89 03115100 59.7 58.22
5,568.49 03/20100 69.1 67.62
5,578.14 03/29100 59.45 57.97
5,577.84 04/04/00 59.75 58.27
5,578.04 04/13/00 59.55 58.07
5,578.24 04/21 /00 59.35 57.87
5,578.39 04/28/00 59.2 57.72
5,578.39 05101 /00 59.2 57.72
5,578.79 05/1 1/00 58.8 57.32
5,578.39 05115100 59.2 57.72
5,578.79 05/25 /00 58.8 57.32
5,578.81 06109100 58.78 57.30
5,578.89 06/16/00 58.7 57.22
5,578.74 06/26/00 58.85 57.37
5,578.86 07/06/00 58.73 57.25
5,578.87 07/13/00 58.72 57.24
5,578.84 07/18/00 58.75 57.27
5,579.03 07/27/00 58.56 57.08
5,579.03 08/02/00 58.56 57.08
5,579.05 08/09/00 58.54 57.06
5,579.04 08/15/00 58.55 57.07
5,579.25 08/31 /00 58.34 56.86
5,579.35 09/08/00 58.24 56.76
5,579.40 09113/00 58.19 56.71
5,579.46 09/20/00 58.13 56.65
5,579.44 10/05/00 58.15 56.67
5,579.79 11109100 57.8 56.32
5,579.73 12/06100 57.86 56.38
5,580.01 01103/01 57.58 56.10
5,580.30 02/09/01 57.29 55.81
5,580.66 03/27/01 56.93 55.45
5,580.75 04/30101 56.84 55.36
Water Levels and Data over Time
White Mesa Mill -Well TW 4-9
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) ~LSD) ~MP) Riser (L) Monitoring ~blw.MP) (blw.LSD) Well
5,636.11 5,637.59 1.48 121.33
5,581.04 05/31/01 56.55 55.07
5,581.12 06/21/01 56.47 54.99
5,581.15 07/10/01 56.44 54.96
5,581.51 08/20101 56.08 54.60
5,581.70 09119/01 55.89 54.41
5,581.61 10102/01 55.98 54.50
5,581.04 05/31/01 56.55 55.07
5,581.12 06/21/01 56.47 54.99
5,581.15 07110/01 56.44 54.96
5,581.51 08/20101 56.08 54.60
5,581.70 09119101 55.89 54.41
5,581.61 10/02/01 55.98 54.50
5,581.83 11108/01 55.76 54.28
5,582.17 12/03/01 55.42 53.94
5,582.21 01103/02 55.38 53.90
5,582.57 02/06/02 55.02 53.54
5,583.12 03/26/02 54.47 52.99
5,582.77 04/09102 54.82 53.34
5,583.21 05/23/02 54.38 52.90
5,582.94 06/05/02 54.65 53.17
5,582.71 07/08/02 54.88 53.40
5,583.67 08/23/02 53.92 52.44
5,583.82 09111102 53.77 52.29
5,584.01 10/23/02 53.58 52.10
5,583.88 11122/02 53.71 52.23
5,583.81 12/03/02 53.78 52.30
5,584.28 01/09103 53.31 51.83
5,584.41 02/12/03 53.18 51.70
5,584.68 03/26/03 52.91 51.43
5,584.49 04/02/03 53.10 51.62
5,584.51 05/01103 53.08 51.60
5,583.59 06/09103 54.00 52.52
5,582.96 07/07/03 54.63 53.15
5,582.98 08/04/03 54.61 53.13
5,582.57 09111/03 55.02 53.54
5,582.25 10102/03 55.34 53.86
5,582.09 11107/03 55.50 54.02
5,582.48 12/03/03 55.11 53.63
5,583.69 01115/04 53.90 52.42
5,583.89 02110104 53.70 52.22
5,584.30 03/28/04 53.29 51.81
5,584.59 04112/04 53.00 51.52
5,584.87 05113/04 52.72 51.24
Water Levels and Data over Time
White Mesa Mill -Well TW 4-9
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) ~MP) Riser (L) Monitorin~ (blw.MP) (blw.LSD) Well
5,636.11 5,637.59 1.48 121.33
5,584.96 06118/04 52.63 51.15
5,585.50 07/28/04 52.09 50.61
5,584.81 08/30/04 52.78 51.30
5,584.40 09/16/04 53.19 51.71
5,583.91 10/11104 53.68 52.20
5,583.39 11116/04 54.20 52.72
5,583.54 12/22/04 54.05 52.57
5,583.34 01118/05 54.25 52.77
5,583.66 02/28/05 53.93 52.45
5,583.87 03115/05 53.72 52.24
5,584.74 04126/05 52.85 51.37
5,585.26 05/24/05 52.33 50.85
5,585.06 06/30105 52.53 51.05
5,584.67 07/29105 52.92 51.44
5,584.75 09/12/05 52.84 51.36
5,584.51 12/07/05 53.08 51.60
5,585.74 03/08/06 51.85 50.37
5,584.74 06/13106 52.85 51.37
5,584.26 07118/06 53.33 51.85
5,584.21 11107/06 53.38 51.90
5,584.67 02/27/07 52.92 51.44
5,584.06 05/02/07 53.53 52.05
5,585.33 08114/07 52.26 50.78
5,585.42 10110/07 52.17 50.69
5,587.01 03/26/08 50.58 49.10
5,585.44 06/24/08 52.15 50.67
5,585.23 08/26/08 52.36 50.88
5,584.42 10/14/08 53.17 51.69
5,583.59 03/03/09 54 52.52
5,583.35 06/24/09 54.24 52.76
5,582.91 09110/09 54.68 53.20
5,583.43 12111109 54.16 52.68
5,584.00 03111110 53.59 52.11
5,583.27 05111110 54.32 52.84
5,582.92 09/29110 54.67 53.19
Water Levels and Data over Time
White Mesa Mill -Well TW 4-10
Total or
Measuring Measured
Water Land Point Depth to Total Depth Total
Elevation Surface Elevation Length Of Date Of Water to Water Depth Of
(WL) (LSD) (MP~ Riser ~L) Monitorin~ (blw.MP) (blw.LSD) Well
5,631.99 5,634.24 2.25 121.33
5,576.75 01103/02 57.49 55.24
5,576.92 02/06/02 57.32 55.07
5,577.43 03/26/02 56.81 54.56
5,577.22 04/09/02 57.02 54.77
5,577.80 05/23/02 56.44 54.l9
5,577.47 06/05/02 56.77 54.52
5,577.55 07/08/02 56.69 54.44
5,578.10 08/23/02 56.14 53.89
5,578.24 09111102 56.00 53.75
5,578.49 10/23/02 55.75 53.50
5,578.43 11122/02 55.81 53.56
5,578.43 12/03/02 55 .81 53.56
5,578.66 01109/03 55.58 53.33
5,578.66 02112/03 55.58 53.33
5,578.78 03/26/03 55.46 53.21
5,578.90 04/02/03 55.34 53.09
5,578.83 05/01103 55.41 53 .16
5,578.05 06/09/03 56.l9 53.94
5,577.38 07/07/03 56.86 54.61
5,577.15 08/04/03 57.09 54.84
5,576.76 09111103 57.48 55.23
5,576.36 10102/03 57.88 55.63
5,576.05 11107/03 58.19 55.94
5,576.20 12/03/03 58.04 55.79
5,577.43 01115/04 56.81 54.56
5,577.81 02/10/04 56.43 54.18
5,578.47 03/28/04 55.77 53.52
5,578.69 04/12/04 55.55 53.30
5,578.93 05113/04 55.31 53.06
5,578.99 06/18/04 55.25 53.00
5,579.18 07/28/04 55.06 52.81
5,579.06 08/30104 55.18 52.93
5,578.78 09/16/04 55.46 53.21
5,577.80 10/11104 56.44 54.19
5,577.13 11116/04 57.11 54.86
5,576.96 12/22/04 57.28 55.03
5,576.63 01118/05 57.61 55.36
5,576.82 02/28/05 57.42 55.17
5,576.86 03/15/05 57.38 55.13
5,577.52 04126/05 56.72 54.47
5,578.01 05/24/05 56.23 53.98
5,578.15 06/30105 56.09 53.84
5,577.90 07/29/05 56.34 54.09
Water Levels and Data over Time
White Mesa Mill-Well TW4-10
Total or
Measuring Measured
Water Land Point Depth to Total Depth Total
Elevation Surface Elevation Length Of Date Of Water to Wate,' Deptb or
(WL) (LSD) (MP) Riser (L) MonitorillG (blw.MP) ~blw.LSD) Well
5631.99 5,634.24 2.25 121.33
5578.02 09/12/05 56.22 53.97
5577.56 12/07/05 56.68 54.43
5,579.69 03/08/06 54.55 52.30
5578.34 06113106 55.90 53.65
5,577.94 07/18/06 56.30 54.05
5578.01 11 /07/06 56.23 53.98
5578.43 02/27/07 55.81 53.56
5,577.84 05/02/07 56.40 54.15
5,578.74 08/14/07 55.50 53.25
5,579.04 10/10/07 55.20 52.95
5580.69 03126/08 53.55 51.30
5,579.87 06/24/08 54.37 52.12
5579.47 08126/08 54.77 52.52
5578.87 10/14/08 55.37 53.12
5,578.01 03/10/09 56.23 53.98
5,577.85 06/24/09 56.39 54.14
5,577.49 09/10/09 56.75 54.50
5,577.98 12/11/09 56.26 54.01
5,578.38 03/11/10 55.86 53.61
5,578.16 05/11110 56.08 53.83
5,577.85 09/29/10 56.39 54.14
Water Levels and Data over Time
White Mesa Mill -Well TW 4-11
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) ~MP) Riser (L) Monitorin~ (blw.MP) (blw.LSD) Well
5,621.92 5,623.62 1.70 121.33
5,548.32 01103/02 75.30 73.60
5,548.73 02/06102 74.89 73.19
5,549.03 03/26102 74.59 72.89
5,548.84 04/09/02 74.78 73.08
5,549.30 05/23/02 74.32 72.62
5,549.01 06105/02 74.61 72.91
5,549.22 07/08/02 74.40 72.70
5,549.44 08/23/02 74.18 72.48
5,549.57 09111102 74.05 72.35
5,549.64 10/23/02 73.98 72.28
5,549.58 11122/02 74.04 72.34
5,549.62 12/03/02 74.00 72.30
5,549.85 01109/03 73.77 72.07
5,549.91 02112/03 73.71 72.01
5,550.15 03/26103 73.47 71.77
5,550.01 04/02/03 73.61 71.91
5,550.31 05/0\/03 73.31 71.61
5,550.44 06109/03 73.18 71.48
5,550.33 07/07/03 73.29 71.59
5,550.35 08/04/03 73.27 71.57
5,550.44 09/11/03 73.18 71.48
5,550.47 10/02/03 73.15 71.45
5,550.60 11/07/03 73.02 71.32
5,550.60 12/03/03 73.02 71.32
5,550.94 01115/04 72.68 70.98
5,551.00 02/10104 72.62 70.92
5,550.34 03/28/04 73.28 71.58
5,551.54 04112/04 72.08 70.38
5,551.89 05/13/04 71.73 70.03
5,551.94 06/18/04 71.68 69.98
5,552.49 07/28/04 7l.l3 69.43
5,552.74 08/30104 70.88 69.18
5,553.01 09/16104 70.61 68.91
5,553.11 10/11104 70.51 68.81
5,553.19 11/16104 70.43 68.73
5,553.53 12/22/04 70.09 68.39
5,553.31 01118/05 70.31 68.61
5,553.84 02/28/05 69.78 68.08
5,554.04 03/15/05 69.58 67.88
5,554.23 04/26105 69.39 67.69
5,553.87 05/24/05 69.75 68.05
5,554.46 06/30105 69.16 67.46
5,554.57 07/29/05 69.05 67.35
Water Levels and Data over Time
White Mesa Mill -Well TW4-11
Total or
Measuring Measured Total
Water Land Point Depth to Deptb to Total
Elevation Surface Elevation Leng~h Of Date Of Water Water Depth Of
(WL~ (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5621.92 5,623.62 1.70 121.33
5,553.86 09/12/05 69.76 68.06
5555.30 12107/05 68.32 66.62
5,556.20 03/08/06 67.42 65.72
5,556.48 06/14/06 67.14 65.44
5556.37 0711 8/06 67.25 65.55
5556.94 I J107/06 66.68 64.98
5557.92 02127/07 65.7 64
5557.84 05/02/07 65.78 64.08
5558.02 08/15/07 65.60 63.90
5,557.13 10/10/07 66.49 64.79
5,569.74 03/26/08 53.88 52.18
5,561.01 06/24/08 62.61 60.91
5,562.07 08/26/08 61.55 59.85
5,562.47 10114/08 61.15 59.45
5,563.80 03/10/09 59.82 58.12
5,564.27 06124/09 59.35 57 .65
5,564.32 09/(0/09 593 57.60
5,564.70 12/1 J/09 58.92 57.22
5,565.14 03/11/10 58.48 56.78
5,565.6 1 05/1U10 58.01 56.31
5,565.67 09/29/10 57.95 56.25
Water Levels and Data over Time
White Mesa Mill -Well TW 4-12
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,622.38 5,624.03 1.65 121.33
5,580.71 08/23/02 43.32 41.67
5,581.34 09111102 42.69 41.04
5,581.13 10/23/02 42.90 41.25
5,581.27 11/22/02 42.76 4l.l1
5,581.35 12/03/02 42.68 41.03
5,582.38 01109/03 41.65 40.00
5,582.27 02112/03 41.76 40.11
5,582.51 03/26103 41.52 39.87
5,581.91 04/02/03 42.12 40.47
5,582.72 05101103 41.31 39.66
5,582.93 06109103 4l.l0 39.45
5,583.01 07/07/03 41.02 39.37
5,583.11 08/04/03 40.92 39.27
5,583.35 09111103 40.68 39.03
5,583.52 10102/03 40.51 38.86
5,583.57 11107/03 40.46 38.81
5,583.81 12/03103 40.22 38.57
5,584.17 01115/04 39.86 38.21
5,584.19 02/10104 39.84 38.19
5,584.31 03/28/04 39.72 38.07
5,584.70 04/12/04 39.33 37.68
5,584.68 05/13/04 39.35 37.70
5,584.73 06118/04 39.30 37.65
5,585.16 07/28/04 38.87 37.22
5,585.18 08/30104 38.85 37.20
5,585.29 09116104 38.74 37.09
5,585.65 10111104 38.38 36.73
5,585.71 11/16104 38.32 36.67
5,586.15 12/22/04 37.88 36.23
5,585.94 01118/05 38.09 36.44
5,586.36 02/28/05 37.67 36.02
5,586.75 03115105 37.28 35.63
5,587.00 04/26105 37.03 35.38
5,587.15 05/24/05 36.88 35.23
5,587.38 06/30105 36.65 35.00
5,587.38 07/29/05 36.65 35.00
5,587.74 09112/05 36.29 34.64
5,588.23 12/07/05 35.80 34.15
5,588.72 03/08/06 35.31 33.66
5,588.14 06113 /06 35.89 34.24
5,588.13 07118/06 35.90 34.25
5,584.50 11107/06 39.53 37.88
5588.65 02/27/07 35.38 33.73
Water Levels and Data over Tjme
White Mesa Mill-Well TW4-12
Total or
Measuring Measured Total
Water Land Point Depth to Deptb to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) ~MP) Riser (L) MonitorinG ~blw.MP) (blw.LSD2 Well
5,622.38 5,624.03 1.65 121.33
5,588.33 05/02/07 35.70 34.05
5,586.29 08114/07 37.74 36.09
5586.48 10/10/07 37.55 35.90
5,587.56 03/26/08 36.4-7 34.82
5587.39 06124/08 36.64 34.99
5587.1.5 08/26/08 36.88 35.23
5586.64 10114/08 37.39 35.74
5,585.97 03/03/09 38.06 36.41
5,585.54 06124/09 38.49 36.84
5,585.34 09/10/09 38.69 37.04
5585.57 12111109 38.46 36.81
5,585.68 03111110 38.35 36.70
5586.15 05/11 /10 37.88 36.23
5,585.48 09/29/\0 38.55 36.90
Water Levels and Data over Time
White Mesa Mill -Well TW 4-13
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) ~L D} (MP) Riser (L) Monitorin~ (blw.MP) (blw.LSD) Well
5,618.09 5,619.94 1.85 121.33
5,529.66 08/23/02 90.28 88.43
5,530.66 09111/02 89.28 87.43
5,529.10 10/23/02 90.84 88.99
5,530.58 11122/02 89.36 87.51
5,530.61 12/03/02 89.33 87.48
5,529.74 01109103 90.20 88.35
5,531.03 02/12/03 88.91 87.06
5,531.82 03/26/03 88.12 86.27
5,524.63 04/02/03 95.31 93.46
5,531.54 05/01103 88.40 86.55
5,538.46 06/09103 81.48 79.63
5,539.38 07/07/03 80.56 78.71
5,540.72 08/04/03 79.22 77.37
5,541.25 09111103 78.69 76.84
5,541.34 10/02/03 78.60 76.75
5,541.69 11107/03 78.25 76.40
5,541.91 12/03/03 78.03 76.18
5,542.44 01115/04 77.50 75.65
5,542.47 02/10104 77.47 75.62
5,542.84 03/28/04 77.10 75.25
5,543.08 04/12/04 76.86 75.01
5,543.34 05/13/04 76.60 74.75
5,543.40 06/18/04 76.54 74.69
5,544.06 07/28/04 75.88 74.03
5,544.61 08/30104 75.33 73.48
5,545.23 09116/04 74.71 72.86
5,546.20 10111104 73.74 71.89
5,547.43 11116/04 72.51 70.66
5,548.96 12/22/04 70.98 69.13
5,549.02 01118/05 70.92 69.07
5,550.66 02/28/05 69.28 67.43
5,551.26 03/15/05 68.68 66.83
5,552.23 04/26/05 67.71 65.86
5,552.87 05/24/05 67.07 65.22
5,553.42 06/30105 66.52 64.67
5,554.00 07/29/05 65.94 64.09
5,555.21 09112/05 64.73 62.88
5,558.13 12/07/05 61.81 59.96
5,562.93 03/08/06 57.01 55.16
5,564.39 06113/06 55.55 53.70
5,562.09 07118/06 57.85 56.00
5,565.49 11107/06 54.45 52.60
5571.08 02/27/07 48.86 47.01
Water Levels and Data over Time
White Mesa Mill -Well TW 4-13
Total or
Measuring Measured Tot.al
Water· Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Deptb or
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,618.09 5,619.94 1.85 121.33
5,570.63 05/02/07 49.31 47.46
5,565.24 08114/07 54.7 52.85
5,565.83 10110/07 54.11 52.26
5569.29 03/26/08 50.65 48.80
5,570.00 06/24/08 49.94 48.09
5570.41 08/26/08 49.53 47.68
5,570.64 10/14/08 49.3 47.45
5570.43 03/03/09 49.51 47.66
5,570.56 06/24/09 49.38 47.53
5,570.42 09/10109 49.52 47.67
5,571.15 12/1U09 48.79 46.94
5,572.01 03/11/10 47.93 46.08
5572.88 05111110 47.06 45.21
5,573.17 09129110 46.77 44.92
Water Levels and Data over Time
White Mesa Mill-Well TW4-14
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (~SD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,610.92 5,612.77 1.85 121.33
5,518.90 08/23/02 93.87 92.02
5,519.28 09111102 93.49 91.64
5,519.95 10/23/02 92.82 90.97
5,520.32 11122/02 92.45 90.60
5,520.42 12/03/02 92.35 90.50
5,520.70 01109/03 92.07 90.22
5,520.89 02112/03 91.88 90.03
5,521.12 03/26/03 91.65 89.80
5,521.12 04/02/03 91.65 89.80
5,521.24 05/01103 91.53 89.68
5,521.34 06/09/03 91.43 89.58
5,521.36 07/07/03 91.41 89.56
5,521.35 08/04/03 91.42 89.57
5,521.30 09111/03 91.47 89.62
5,521.35 10102/03 91.42 89.57
5,521.36 11/07/03 91.41 89.56
5,521.16 12/03/03 91.61 89.76
5,521.29 01115/04 91.48 89.63
5,521.36 02110104 91.41 89.56
5,521.46 03/28/04 9l.31 89.46
5,521.54 04112/04 91.23 89.38
5,521.59 05113/04 91.18 89.33
5,521.69 06118/04 91.08 89.23
5,521.71 07/28/04 91.06 89.21
5,521.76 08/30104 91.01 89.16
5,521.77 09/16/04 91.00 89.15
5,521.79 10/11104 90.98 89.13
5,521.80 11116/04 90.97 89.12
5,521.82 12/22/04 90.95 89.10
5,521.82 01118/05 90.95 89.10
5,521.86 02/28/05 90.91 89.06
5,521.85 03/15/05 90.92 89.07
5,521.91 04/26/05 90.86 89.01
5,521.93 05/24/05 90.84 88.99
5,521.94 06/30105 90.83 88.98
5,521.84 07/29/05 90.93 89.08
5,521.99 09/12/05 90.78 88.93
5,522.04 12/07/05 90.73 88.88
5,522.05 03/08/06 90.72 88.87
5,522.27 06/13/06 90.50 88.65
5,521.92 07118/06 90.85 89.00
5,520.17 11107/06 92.60 90.75
5522.24 02/27/07 90.53 88.68
Water Levels and Data over Time
White Mesa Mill -Well TW 4-14
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP~ (blw.LSD) Well
5,610.92 5,612.77 1.85 121.33
5522.47 05/02/07 90.30 88.45
5520.74 08/14/07 92.03 90.18
5518.13 10/10/07 94.64 92.79
5522.85 03/26/08 89.92 88.07
5522.91 06124/08 89.86 88.01
5,523.01 08126/08 89.76 87.91
5,522.96 10114/08 89.81 87.96
5,523.20 03 /03/09 89.57 87.72
5523.33 06/24/09 89.44 87.59
5,523.47 09/10/09 89.3 87.45
5,523.54 121l J/09 89.23 87.38
5,522.98 03 /11 110 89.79 87.94
5524.0l 05/11/10 88.76 86.91
5524.37 09/29/10 88.40 86.55
Water Levels and Data over Time
White Mesa Mill -Well TW 4-15 (MW -26)
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitorin~ (blw.MP) (blw.LSD) Well
5,624.15 5,625.45 1.30 121.33
5,574.75 08/23/02 50.70 49.40
5,574.97 09111102 50.48 49.18
5,575.10 10/23/02 50.35 49.05
5,574.99 11122/02 50.46 49.16
5,575.28 12/03/02 50.17 48.87
5,575.41 01109/03 50.04 48.74
5,575.43 02112/03 50.02 48.72
5,575.63 03/26/03 49.82 48.52
5,575.91 04/02/03 49.54 48.24
5,575.81 05/01103 49.64 48.34
5,572.36 06/09103 53.09 51.79
5,570.70 07/07/03 54.75 53.45
5,570.29 08/04/03 55.16 53.86
5,560.94 09111 /03 64.51 63.21
5,560.63 10102/03 64.82 63.52
5,560.56 11107/03 64.89 63.59
5,564.77 12/03/03 60.68 59.38
5,570.89 01115104 54.56 53.26
5,572.55 02110104 52.90 51.60
5,574.25 03/28/04 51.20 49.90
5,574.77 04112/04 50.68 49.38
5,575.53 05/13/04 49.92 48.62
5,575.59 06/18/04 49.86 48.56
5,576.82 07/28/04 48.63 47.33
5,527.47 0911 6/04 97.98 96.68
5,553.97 11116/04 71.48 70.18
5,562.33 12/22/04 63.12 61.82
5,550.00 01118/05 75.45 74.15
5,560.02 04/26/05 65.43 64.13
5,546.11 05/24/05 79.34 78.04
5,556.71 06/30105 68.74 67.44
5,554.95 07/29105 70.50 69.20
5,555.48 09112/05 69.97 68.67
5,551.09 12/07/05 74.36 73 .06
5,552.85 03/08/06 72.60 71.30
5,554.30 06/13/06 71.15 69.85
5,554.87 07118/06 70.58 69.28
5,550.88 11/07/06 74.57 73.27
5558.77 02/27/07 66.68 65.38
5,548.54 05102/07 76.91 75.61
5,551.33 10110107 74.12 72.82
5,545.56 03/26/08 79.89 78.59
5,545.56 06/25108 79.89 78.59
Water Levels and Data over Time
White Mesa MiII-Well TW4-15 (MW-26)
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth or
(WL) (LSD) {MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Wen
5,624.15 5,625.45 1.30 121.33
5,545.82 08126/08 79.63 78.33
5545.64 10/14/08 79.81 78.51
5,544.45 03/03/09 81.00 79.70
5545.32 06/24/09 80.13 78.83
5544.61 09/\0/09 80.84 79.54
5,549.33 12111 /09 76.12 74.82
5,543.78 03111 /10 81.67 80.37
5,545.61 05/11 /10 79.84 78.54
5547.43 09129/10 78.02 76.72
Water Levels and Data over Time
White Mesa Mill-Well TW4-16
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) {MP~ Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,622.19 5,624.02 1.83 121.33
5,562.91 08/23/02 61.11 59.28
5,563.45 09111102 60.57 58.74
5,563.75 10/23/02 60.27 58.44
5,563 .68 11122/02 60.34 58 .51
5,563.68 12/03/02 60.34 58.51
5,564.16 01109103 59.86 58.03
5,564.25 02112/03 59.77 57.94
5,564.53 03126/03 59.49 57.66
5,564.46 04/02/03 59.56 57.73
5,564.79 05/01103 59.23 57.40
5,564.31 06/09/03 59.71 57.88
5,563.29 07/07/03 60.73 58.90
5,562.76 08/04/03 61.26 59.43
5,561.73 09111/03 62.29 60.46
5,561.04 10102/03 62.98 61.15
5,560.39 11107/03 63.63 61.80
5,559.79 12/03/03 64.23 62.40
5,561.02 01115/04 63 61.17
5,561.75 02110104 62.27 60.44
5,562.98 03/28/04 61.04 59.21
5,563.29 04Jl2/04 60.73 58.90
5,564.03 05Jl3/04 59.99 58.16
5,564.09 06Jl8/04 59.93 58.10
5,565.08 07/28/04 58.94 57.11
5,564.56 08/30/04 59.46 57.63
5,563.55 09116/04 60.47 58.64
5,561.79 10111 /04 62.23 60.40
5,560.38 11116/04 63.64 61.81
5,559.71 12/22/04 64.31 62.48
5,559.14 01118/05 64.88 63.05
5,558.65 02/28/05 65.37 63.54
5,558.54 03Jl5/05 65.48 63.65
5,558.22 04/26/05 65.8 63.97
5,558.54 05/24/05 65.48 63 .65
5,559.24 06/30/05 64.78 62.95
5,559.38 07/29/05 64.64 62.81
5,559.23 09112/05 64.79 62.96
5,557.67 12/07/05 66.35 64.52
5,557.92 03/08/06 66.10 64.27
5,558.47 06/13/06 65.55 63.72
5,558.42 07/18/06 65.60 63.77
5,558.09 11107/06 65.93 64.10
5557.34 02/27/07 66.68 64.85
Water Levels and Data over Time
White Mesa Mill -Well TW 4-16
Total or
Measuring Measured Total
Water Land Point Depth to Deptb to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) {MP) Riser (L) Monitoring ~blw.MP) (blw.LSD) WeU
5,622.19 5,624.02 1.83 121.33
5547.11 05/02/07 76.91 75.08
5,558.52 08/14/07 65.5 63.67
5,559.02 10/10/07 65.00 63./7
5,561 .04 03/26/08 62.98 61.15
5560.06 06/24/08 63.96 62.13
5559.32 08126/08 64.7 62.87
5,558.89 10/1 4/08 65.13 63.30
5,558.40 03/03/09 65.62 63.79
5558.32 06/24/09 65.7 63.87
5558.03 09/10/09 65 .99 64.]6
5,558.81 12/11 /09 65.21 63.38
5559.80 03/1111 0 64.22 62.39
5559.85 05/1 1/10 64./7 62.34
5,560.54 09129/10 63.48 61.65
Water Levels and Data over Time
White Mesa Mill -Well TW 4-17 (MW -32)
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitorin~ (blw.MP) (blw.LSD~ Well
5,623.41 5,625.24 1.83 121.33
5,542.17 08/23/02 83.07 81.24
5,542.39 09111102 82.85 81.02
5,542.61 10/23/02 82.63 80.80
5,542.49 11122/02 82.75 80.92
5,542.82 12/03/02 82.42 80.59
5,543.03 01109/03 82.21 80.38
5,543.04 02/12/03 82.20 80.37
5,543.41 03/26/03 81.83 80.00
5,543.69 04/02/03 81.55 79.72
5,543.77 05/01103 81.47 79.64
5,544.01 06/09103 81.23 79.40
5,544.05 07/07/03 81.19 79.36
5,543.99 08/04/03 81.25 79.42
5,544.17 09/11103 81.07 79.24
5,544.06 10102/03 81.18 79.35
5,544.03 11107/03 81.21 79.38
5,543.94 12/03/03 81.30 79.47
5,543.98 01115/04 81.26 79.43
5,543.85 02/10/04 81.39 79.56
5,544.05 03/28/04 81.19 79.36
5,544.33 04/12/04 80.91 79.08
5,544.55 05/13/04 80.69 78.86
5,544.59 06/18/04 80.65 78.82
5,545.08 07/28/04 80.16 78.33
5,545.26 08/30/04 79.98 78.15
5,545.48 09/16/04 79.76 77.93
5,545.61 10111/04 79.63 77.80
5,545.46 11116/04 79.78 77.95
5,545.66 12/22/04 79.58 77.75
5,545.33 01118/05 79.91 78.08
5,545.51 02/28/05 79.73 77.90
5,545.57 03115/05 79.67 77.84
5,545.46 04/26/05 79.78 77.95
5,545.45 05/24/05 79.79 77.96
5,545.33 06/30/05 79.91 78.08
5,545.16 07/29/05 80.08 78.25
5,545.54 09112/05 79.70 77.87
5,545.77 12/07/05 79.47 77.64
5,546.09 03/08/06 79.15 77.32
5,545.94 06/13/06 79.30 77.47
5,545.94 07/18/06 79.30 77.47
5,546.24 11107/06 79.00 77.17
5546.81 02127/07 78.43 76.6
Water Levels and Data over Time
White Mesa Mill -Well TW4-17 (MW-32)
Total or
Measuring Measured Total
Water Land Point Depth to Deptb to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (iVlP) Ri er (L) Monitoring (blw.MP) ~blw.LSD) Well
5,623.41 5,625.24 1.83 121.33
5546.56 05/02/07 78.68 76.85
5546.81 08/15107 78.43 76.6
5546.96 10/10/07 78.28 76.45
5547.9 03/26/08 77.34 75.51
5548.08 06/25/08 77.16 75.33
5548.42 08/26/08 76.82 74.99
5548.05 10/14/08 77.19 75.36
5548.29 03/03/09 76.95 75.12
5548.09 06124/09 77.15 75.32
5547.79 09/10/09 77.45 75.62
5548.09 12/11 /09 77.15 75.32
5,548.50 03111110 76.74 74.91
5,548.89 05111 /10 76.35 74.52
5,548.83 09/29110 76.41 74.58
Water Levels and Data over Time
White Mesa Mill -Well TW 4-18
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) ~LSD} (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,639.13 5,641.28 2.15 121.33
5,585.13 08/23/02 56.15 54.00
5,585.41 09111102 55.87 53.72
5,585.47 10/23/02 55.81 53.66
5,585.40 11122/02 55.88 53.73
5,585.68 12/03/02 55.60 53.45
5,585.90 01109/03 55.38 53.23
5,590.79 02/12/03 50.49 48.34
5,586.18 03/26/03 55.10 52.95
5,586.36 04/02/03 54.92 52.77
5,586.24 05/01/03 55.04 52.89
5,584.93 06/09/03 56.35 54.20
5,584.46 07/07/03 56.82 54.67
5,584.55 08/04/03 56.73 54.58
5,584.01 09/11103 57.27 55.12
5,583.67 10/02/03 57.61 55.46
5,583.50 11107/03 57.78 55.63
5,584.08 12/03/03 57.20 55.05
5,585.45 01115/04 55.83 53.68
5,585.66 02110104 55.62 53.47
5,586.13 03/28/04 55.15 53.00
5,586.39 04112/04 54.89 52.74
5,586.66 05113/04 54.62 52.47
5,586.77 06/18/04 54.51 52.36
5,587.35 07/28/04 53.93 51.78
5,586.34 08/30104 54.94 52.79
5,585.85 09/16/04 55.43 53.28
5,585.22 10/11/04 56.06 53.91
5,584.70 11116/04 56.58 54.43
5,584.81 12/22/04 56.47 54.32
5,584.68 01118/05 56.60 54.45
5,585.02 02/28/05 56.26 54.11
5,585.25 03115/05 56.03 53.88
5,586.31 04/26/05 54.97 52.82
5,586.97 05/24/05 54.31 52.16
5,586.58 06/30105 54.70 52.55
5,586.10 07/29/05 55.18 53.03
5,586.05 09112/05 55.23 53.08
5,585.86 12/07/05 55.42 53.27
5,587.13 03/08/06 54.15 52.00
5,585.93 06113/06 55.35 53.20
5,585.40 07118/06 55.88 53.73
5,585.38 11107/06 55.90 53.75
5585.83 02/27/07 55.45 53.30
Water Levels and Data over Time
White Mesa Mill-Well TW4-18
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length or Date or Water Water Depth or
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5639.13 5641.28 2.15 121.33
5585.15 05102/07 56.13 53.98
5586.47 06/24/08 54.81 52.66
5586.3 08/26 /08 54.98 52.83
5585.21 10114/08 56.07 53 .92
5584.47 03/03/09 56.81 54.66
5584.35 06/24/09 56.93 54.78
5583.88 09/10/09 57.4 55.25
5584.43 12/11109 56.85 54.70
5,585.26 03/11110 56.02 53 .87
5,584.17 05/1 1/10 57.11 54.96
5583.61 09129/10 57.67 55.52
Water Levels and Data over Time
White Mesa Mill -Well TW 4-19
Total or
Measuring Measured
Water Land Point Depth to Total Depth
Elevation Surface Elevation Length Of Date Of Water to Water Total Depth Of
(WL) (LSD) (MP) Riser (L) Monitorin~ (blw.MP) (blw.LSD) Well
5,629.53 5,631.39 1.86 121.33
5,581.88 08/23/02 49.51 47.65
5,582.14 09/11102 49.25 47.39
5,582.06 10/23/02 49.33 47.47
5,582.07 11/22/02 49.32 47.46
5,582.16 12/03/02 49.23 47.37
5,582.28 01/09/03 49.11 47.25
5,582.29 02/21103 49.10 47.24
5,582.74 03/26/03 48.65 46.79
5,582.82 04/02/03 48.57 46.71
5,548.47 05/01103 82.92 81.06
5,564.76 06/09/03 66.63 64.77
5,562.53 07/07/03 68.86 67.00
5,564.10 08/04/03 67.29 65.43
5,566.01 08/30104 65.38 63.52
5,555.16 09/16/04 76.23 74.37
5,549.80 10/11104 81.59 79.73
5,546.04 11116/04 85.35 83.49
5,547.34 12/22/04 84.05 82.19
5,548.77 01118/05 82.62 80.76
5,551.18 02/28/05 80.21 78.35
5,556.81 03/15/05 74.58 72.72
5,562.63 04/26/05 68.76 66.90
5,573.42 05/24/05 57.97 56.11
5,552.94 07/29/05 78.45 76.59
5,554.00 09112/05 77.39 75.53
5,555.98 12/07/05 75.41 73.55
5,552.00 03/08/06 79.39 77.53
5,545.74 06113/06 85.65 83.79
5,544.06 07118/06 87.33 85.47
5,548.81 11107/06 82.58 80.72
5543.59 02/27/07 87.8 85.94
5544.55 05/02/07 86.84 84.98
5558.97 08115/07 72.42 70.56
5559.73 10110107 71.66 69.8
5569.26 03/26/08 62.13 60.27
5535.47 06/25/08 95.92 94.06
5541.41 08/26/08 89.98 88.12
5558.45 10/14/08 72.94 71.08
5536.9 03/03/09 94.49 92.63
5547.76 06/24/09 83.63 81.77
5561.48 09110109 69.91 68.05
5548.14 12111109 83.25 81.39
5,570.58 0311111 0 60.81 58.95
Water Land
Elevation urface
(WL) (LSD)
5,629.53
5,561.35
5535.26
Water Levels and Data over Time
White Mesa Mill-Well TW4-19
Total or
Measuring Measured
Point Depth to
Elevation Length Of Date Of Water
(MP) Ri er' (L) Monitoring (blw.MP~
5631.39 1.86
05111110 70.04
09/29/10 96.13
Total Depth
to Water Total Depth Of
{blw.L D) Well
121.33
68.18
94.27
Water Levels and Data over Time
White Mesa Mill-Well TW4-20
Total or
Measuring Measured Total
Water Land Point Depth to Deptb to Total
Elevation urface Elevation Length Of Date Of Water Water Depth Of
(WL~ (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,628.52 5,629.53 1.01 106.0
5,565.70 07/29/05 63.83 62.82
5,546.53 08/30/05 83.00 81.99
5,540.29 09112/05 89.24 88.23
5,541.17 12/07/05 88.36 87.35
5,540.33 03/08/06 89.20 88.19
5530.43 06J13/06 99.10 98.09
5,569.13 07/18/06 60.40 59.39
5,547.95 11/07/06 81.58 80.57
5,549.25 02/27/07 80.28 79.27
5,550.58 05/02/07 78.95 77.94
5,563.60 08/14/07 65.93 64.92
5,555.85 10110/07 73.68 72.67
5,569.10 03/26/08 60.43 59.42
5,560.00 06/25/08 69.53 68.52
5,539.64 08/26/08 89.89 88.88
5,539.51 10/14/08 90.02 89.01
5,553.00 03/03/09 76.53 75.52
5,534.18 06/24/09 95.35 94.34
555839 09/10/09 71.14 70.13
5,560.99 12/11/09 68.54 67.53
5,564.09 03/11110 65.44 64.43
5,564.22 05/11110 65.31 64.30
5560.33 09/29/10 69.20 68.19
Water Levels and Data over Time
White Mesa Mill-Well TW4-21
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
{WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,638.20 5,639.35 1.15 120.92
5,582.98 07/29105 56.37 55.22
5,583.43 08/30105 55.92 54.77
5,581.87 09/12/05 57.48 56.33
5,580.50 12/07/05 58.85 57.70
5,583.64 03/08/06 55.71 54.56
5,580.55 06113/06 58.80 57.65
5,578.95 07118/06 60.40 59.25
5,578.47 11107/06 60.88 59.73
5,579.53 02/27/07 59.82 58.67
5,578.07 05102/07 61.28 60.13
5,583.41 08115107 55.94 54.79
5,583.45 10/10/07 55.9 54.75
5,586.47 03/26/08 52.88 51.73
5,579.16 06/24/08 60.19 59.04
5,579.92 08/26/08 59.43 58.28
5,577.37 10114/08 61.98 60.83
5,578.00 03/10109 61.35 60.20
5,580.14 06/24/09 59.21 58.06
5,578.72 09110109 60.63 59.48
5,579.99 12111109 59.36 58.21
5,582.81 03111110 56.54 55.39
5,582.23 05/11/10 57.12 55.97
5,576.60 09/29110 62.75 61.60
Water Levels and Data over Time
White Mesa MilI-Well TW4-22
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LS D) (MP) ~er(L) Monitoring (blw.MP) (blw.LSD) Well
5,627.83 5,629.00 1.17 113 .5
5571 .. 89 07/29/05 57.11 55.94
5,57220 08/30/05 56.80 55.63
5572.08 09/12/05 56.92 55.75
5571.61 12/07/05 57.39 56.22
5 571.85 03/08/06 57.15 55.98
5,571.62 06/13/06 57.38 56.21
5571.42 07118/06 57.58 56.4 1
5571.02 11 /07/06 57.98 56.8 1
557 1.24 02/27/07 57.76 56.59
5,570.75 06129/07 58.25 57.08
5,571.82 08/14/07 -7.18 56.0 1
5571.99 10/10/07 57.01 55.84
5573.05 03126/08 55.95 54.78
5,573.04 06/24/08 55.96 54.79
5573.04 08/26/08 55 .96 54.79
5573.02 10/14/08 55.98 54.8 1
5573.19 03/10/09 55.81 54.64
5,573.32 06/24/09 55.68 54.5 1
5,573.17 09/10/09 55.83 54.66
5,573.52 12/11 /09 55.48 54.31
5573.88 03/11 /l0 55.12 53.95
557429 05/l l/l0 54.71 53.54
5,574.88 09129/10 54.12 52.95
Water Levels and Data over Time
White Mesa MiIl-Well TW4-23
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,627.83 5,629.00 1.17 113.5
5,560.52 09/13/07 68.48 67.31
5,560.43 10/10107 68.57 67.40
5,560.88 11130107 68.12 66.95
5,561.12 12111/07 67.88 66.71
5,560.82 01108/08 68.18 67.01
5,561.07 02118/08 67.93 66.76
5,561.17 03/26/08 67.83 66.66
5,561.34 04/23/08 67.66 66.49
5561.11 05/30108 67.89 66.72
5,561.16 06/24/08 67.84 66.67
5,561.07 07116/08 67.93 66.76
5,561.31 08/26/08 67.69 66.52
5,562.81 09/10/08 66.19 65.02
5,561.20 10/14/08 67.8 66.63
5,560.92 11/26/08 68.08 66.91
5,561.18 12/29108 67.82 66.65
5,561.78 01126/09 67.22 66.05
5,561.37 02/24/09 67.63 66.46
5,561.49 03/06/09 67.51 66.34
5,561.35 04/07/09 67.65 66.48
5,561.47 05/29109 67.53 66.36
5,561.75 06/30109 67.25 66.08
5,561.75 07/31109 67.25 66.08
5,561.90 08/31109 67.1 65 .93
5,561.76 09110109 67.24 66.07
5,562.27 12111/09 66.73 65.56
5,562.78 03111110 66.22 65.05
5,563.24 05/11/10 65.76 64.59
5,563.10 09/29/10 65.90 64.73
Water Levels and Data over Time
White Mesa Mill-Well TW4-24
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring ~blw.MP) (blw.LSD) Well
5,627.83 5,625.70 -2.l3 113.5
5,568.48 09/13/07 57.22 59.35
5,568.40 10/10107 57.30 59.43
5,569.03 11/30107 56.67 58.80
5,569.17 12/11107 56.53 58.66
5,568.90 01108/08 56.80 58.93
5,569.09 02/18/08 56.61 58.74
5,569.30 03/26/08 56.40 58.53
5,569.55 04/23/08 56.15 58.28
5569.39 05/30108 56.31 58.44
5,569.21 06/24/08 56.49 58.62
5,569.15 07116/08 56.55 58.68
5,569.21 08/26/08 56.49 58.62
5,569.10 09/10/08 56.60 58.73
5,568.99 10/14/08 56.71 58.84
5,568.82 11126/08 56.88 59.01
5,568.79 12/29108 56.91 59.04
5,569.52 01126/09 56.18 58.31
5,569.18 02/24/09 56.52 58.65
5,569.24 03/06/09 56.46 58.59
5,569.08 04/07/09 56.62 58.75
5,569.10 05/29109 56.60 58.73
5,569.29 06/30/09 56.41 58.54
5,569.25 07/31109 56.45 58.58
5,569.35 08/31109 56.35 58.48
5,569.15 09/10/09 56.55 58.68
5,569.51 12/11109 56.19 58.32
5,569.73 03/11/10 55.97 58.l0
5,569.78 05/11/10 55.92 58.05
Water Levels and Data over Time
White Mesa Mill-Well TW4-2S
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD~ (MP) Riser (L) Monitorin~ (blw.MP) (blw.LSD) Well
5,627.83 5,644.91 17.08 113.5
5,601.86 09113/07 43.05 25.97
5,601.89 10110107 43.02 25.94
5,602.57 11130107 42.34 25.26
5,602.82 12/11107 42.09 25.01
5,60l.94 01108/08 42.97 25.89
5,599.13 02118/08 45.78 28.70
5,597.11 03/26/08 47.80 30.72
5,595.51 04/23 /08 49.40 32.32
5594.42 05/30108 50.49 33.41
5,594.26 06/24/08 50.65 33.57
5,586.67 07116/08 58.24 41.16
5,594.17 08/26/08 50.74 33 .66
5,594.23 09110108 50.68 33 .60
5,594.12 10/14/08 50.79 33 .71
5,594.06 11126/08 50.85 33.77
5,594.87 12/29108 50.04 32.96
5,595.89 01126/09 49.02 31.94
5,596.27 02/24/09 48.64 31.56
5,596.47 03/06/09 48.44 3l.36
5,596.74 04/07/09 48.17 31.09
5,597.55 05/29/09 47.36 30.28
5,598.11 06/30109 46.8 29.72
5,598.22 07/31109 46.69 29.61
5,598.52 08/31109 46.39 29.31
5,598.49 09/10/09 46.42 29.34
5,599.48 121l1l09 45.43 28.35
5,599.75 03 /11110 45.16 28.08
5,599.63 05/11110 45.28 28.20
5,598.68 09/29/10 46.23 29.15
Water Levels and Data over Time
White Mesa Mill-Well TW4-26
Total or
Measuring Measured Total
Water Land Point Deptb to Depth to Total
Elevation Surface Elevation Length Of Datt} Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD} Well
5599.98 5601.68 1.70 86
5,536.90 06/14/10 64.78 63.08
5,536.95 09/29/10 64.73 63.03
TabH
Laboratory Analytical Reports
Er\ERGY
I ,\nIJI"/d c', .... , , ,
www.energyiab.com
AMIyIIaI~smc. 1m
Helena, MT 877-472-0711 • Billings, MT 800-735-4488 • Casper, WY 888-235-0515
Gillette, WY 11&-&8&-7175 • Rapid City, SD 888-172-1225 • College Station, TX 888-&90-2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-007
Client Sample ID: MW-4
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
RL -Analyte reporting limit.
QCL -Quality control limit.
Result
38
4.8
1.5
1900
ND
ND
105
107
112
87.0
D -RL increased due to sample matrix.
Units
mg/L
mg/L
ug/L
ug/L
ug/L
ug/L
%REC
%REC
%REC
%REC
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/16/10 10:33
DateReceived: 08/20/1 0
Matrix: Aqueous
MCLI
Qualifiers RL QCL Method Analysis Date 1 By
A4500-CI B 08/31/10 14:14/1jl
D 0.5 E353.2 09/02110 14:15/1jl
1.0 SW8260B 08/30/10 18:401 jlr
D 100 SWB260B 08/27/1019:521 jlr
1.0 SW8260B 08/30/10 18:40 1 jlr
1.0 SWB260B 08/30/10 18:401 jlr
80-120 SWB260B OB/30/10 1 B:40 1 jlr
70-130 SWB260B OB/30/10 1 B:40 1 jlr
80-120 SW8260B 08/30/10 18:401 jlr
80-120 SW8260B 08/30/10 18:40 1 jlr
MCL -Maximum contaminant level.
ND -Not detected at the reporting limit.
Page 90f25
EN:RGY
I I\H.)Pf\1 "111 •
www.energylab.com
AM/JfIaI ~ t6IcI IISI
Helena, MT 877-472-0711 • Billings, MT 801-735-4489 • Casper, WY 888-235-0515
Gillette, WY 1&&-&88-7175 • Rapid City, SD 888-172-1225 • College StatiDn, 1X BlB-690-2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-005
Client Sample 10: TW4-1
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: l,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
35
6.7
1.0
1600
ND
ND
105
109
112
86.0
o -RL increased due to sample matrix.
Units
mg/l
mg/l
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/18/1008:37
DateReceived: 08/20/1 0
Matrix: Aqueous
MCl/
Qualifiers Rl QCl Method Analysis Date I By
A4500-CI B 08/31/10 14:10/ljl
D 0.5 E353.2 09/02110 14:10/ Ijl
1.0 SW8260B 08/30/10 21 :02 / jlr
o 100 SW8260B 08/27/10 18:42 / jlr
1.0 SW8260B 08/30/10 21 :02 / jlr
1.0 SW8260B 08/30/10 21 :02 / jlr
80-120 SW8260B 08/30/10 21 :02 / jlr
70-130 SW8260B 08/30/1021 :02 / jlr
80-120 SW8260B 08/30/10 21 :02 / jlr
80-120 SW8260B 08/30/10 21 :02 / jlr
MCl -Maximum contaminant level.
ND -Not detected at the reporting limit.
Page 70f25
EN:RGY ; >
l ,"I}O I~/'1 t ':Jlt '-
www.energyiab.com
AM/fIJaI~ SIrru 1m
Helena, tIT 817-472-0711 • Billings, tIT 801-735-4489 • Casper, WY 888-235-0515
Gillatte, WY 88&-&86-7175 • Rapid City, SD 888-&72-1225 • College StatiDn, 1X 888-69D-221 a
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-014
Client Sample ID: TW4-1R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
NO
NO
NO
1.6
NO
NO
104
104
112
87.0
Units
mg/l
mg/l
ug/l
ug/l
ug/L
ug/l
%REC
%REC
%REC
%REC
Qualifiers RL
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/17/10 09:20
DateReceived: 08/20/10
Matrix: Aqueous
MCL!
QCL Method Analysis Date 1 By
A4500-CI B 08/31/10 14:40/ljl
E353.2 09/02110 14:38 Iljl
SW8260B 08/30/10 22:50 I jlr
SW8260B 08/30/10 22:50 I jlr
SW8260B 08/30/10 22:50 I jlr
SW8260B 08/30/10 22:501 jlr
SW8260B 08/30/10 22:50 I jlr
SW8260B 08/30/10 22:50 I jlr
SW8260B 08/30/10 22:50 I jlr
SW8260B 08/30/10 22:501 jlr
MCl -Maximum contaminant level.
ND -Not detected at the reporting limit.
Page 16 of 25
EN:RGY
,\IIl)l'/\! Cfd •
www.energytab.com
bl/flla/~1IIra '152
Helena, lIT 811-472-0711 • Billings, lIT 800-735-4489 • Casper, WY 888-235-0515
Gillatte, WY 8&&-&88-7175 · Rapid City, SD 888-112-1225 . College Station, TX 888-&90-2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-008
Client Sample ID: TW4-2
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analy1e reporting limit.
QCl -Quality control limit.
Result
43
6.6
2.5
3300
ND
ND
105
103
113
87.0
D -Rl Increased due to sample matrix.
Units
mg/L
mglL
ug/L
ug/L
ug/l
ug/l
%REC
%REC
%REC
%REC
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/18/10 08:17
DateReceived: 08/20/10
Matrix: Aqueous
MCL!
Qualifiers Rl QCl Method Analysis Date I By
A4500-CI B 08/31/10 14:16/1jl
o 0.5 E353.2 09/02110 14:18/1jl
1.0 SW8260B 08/30/10 19:16 I jlr
o 1000 SW8260B 08/27/10 20:28 I jlr
1.0 SW8260B 08/30/10 19:16 I jir
1.0 SW8260B 08/30/1019:16/ jlr
80-120 SW8260B 08/30/10 19:16 I jlr
70-130 SWB260B 08/30/1019:16 I jlr
80-120 SW8260B 08/30/1019:16 I jlr
80-120 SW8260B 08/30/10 19:16 I jlr
MCl -Maximum contaminant level.
ND -Not detected at the reporting limit.
Page 10 of 25
EI\ERGY
\ I )',11-/11 f..~1 JI-•
www.energylab.com
AM(yIIaI EltIllN~ SIna 1HZ
Hsleoa, MT 811-472-0111 • Billings, MT 808-735-4489 • Casper, WY 888-235-8515
Gillette, WY 818-&88-7175 • Rapid City, SD 888-&72-1225 • College Station, 1X 888-888-2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
LablD:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-015
Client Sample ID: TW4-2R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
NO
NO
NO
1.7
NO
NO
103
106
112
87.0
Units
mg/l
mg/l
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Qualifiers Rl
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/17/10 10:03
DateRecelved: 08/20/1 0
Matrix: Aqueous
MCll
QCl Method Analysis Date I By
A4500-CI B 08/31/10 14:42/1jl
E353.2 09/02110 14:40 Iljl
SW8260B 08/31/10 00:031 jlr
SW8260B 08/31/10 00:031 jlr
SW8260B 08/31/10 00:031 jlr
SW8260B 08/31/10 00:031 jlr
SW8260B 08/31/1000:031 jlr
SW8260B 08/31/1000:031 jlr
SW8260B 08/31/1000:031 jlr
SW8260B 08/31/1000:031 jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 17 of 25
EI\ERGY
L\Hn~~J"()IHf S
Helena, MT 177-472-8711 • 81111nll, MT 1G'-735-44111 • Cuper, WY 11111-235-1515
Glllitte, WY 1111-111·7175 • Rapid City, SD 11111·172·1225 • Coli.,. Station, TX 1111-1111-2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 10080518-001
Client Samp/alD: TW4-3
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene·d4
Surr: Oibromofluoromethane
SUIT: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definition.:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
22
3.1
NO
NO
NO
NO
106
108
107
86.0
o -Rl Increased due to sample matrix.
Units
mgll
mgll
ugll
ugll
ugll
ugll
%REC
%REC
%REC
%REC
Report Data: 09/03/10
Collection Date: 08/10/10 06:27
DateRecalved: 08/13/10
Matrix: Aqueous
MCU
Qualifiers RL QCL Method Analysis Date 1 By
A4500-CI B 08/24/10 10:49 /lr
0 0.2 E353.2 08126/10 12:49/1jl
1.0 SW8260B 08/18/10 13:35 1 jlr
1.0 SW8260B 08/18/1013:351 jlr
1.0 SW8260B 08/18/10 13:35 1 i'r
1.0 SW8260B 08118/10 13:35 1 jlr
80-120 SW8260B 08/18110 13:35 1 ilr
70-130 SW8260B 08/18/10 13:35 1 jlr
80-120 SW8260B 08118/10 13:35 1 jlr
80-120 SW8260B 08118/1013:351 ilr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 4 of 52
EN:RGY
I\H .J~f\Tr:'llf <.
:" www.8Mfrilab.com
,.".. E.ruIIIII.5IIat 1m
H~a,IIT'71-412"'711 • Bllllnll,lIT 801-731-4411 • Casper, 'NY 8BI-235-0515
Gil/etta. Vi'( 111-.... 7175 • Rapid City, SD IBI-172-1225 • CDlla,e Station, TX 181-811-221.
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-011
Client Sample 10: TW4-3R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLAnLE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
RL -Analyte reporting limit.
OCL -Quality control limit.
Result
NO
NO
NO
NO
NO
NO
103
103
106
88.0
Units
m!Vl
m!Vl
u!VL
u!VL
u!VL
u!VL
%REC
%REC
%REC
%REC
Qualifiers RL
1
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 08/09/10 08:41
DateRecelved: 08/13/10
Matrix: Aqueous
MCU
QCL Method Analysis Date I By
A4500-CI B 08/24/10 11 :25 Ilr
E353.2 08/26/10 13:26 Iljl
SW8260B 08/18/10 23:37 I jlr
SW8260B 08/18/10 23:37 I jlr
SW8260B 08/18/10 23:37 I jlr
SW8260B 08118/10 23:37 I jlr
SW8260B 08/18/10 23:37 I jlr
SW8260B 08118/1023:371 jlr
SW8260B 08/18/10 23:37 I jir
SW8260B 08/18/10 23:37 I jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 14 of 52
EN:RGY
I J\' ,1.,." 1('1-/1: '--
_.energylab.com
~I ElaIIIIIU SItIu IW
Helena, lIlT 817-412-0111 • Billings, MT 808-135-4489 • Casper, WY 888-235-0515
Gillatta, WY 818-688-1115 • Rapid City, SD 888-112-1225 • Collage Station, 1X 888-690-2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-006
Client Sample ID: TW4-4
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
36
7.3
1.3
2100
ND
ND
104
107
112
87.0
D -Rl increased due to sample matrix.
Units
mg/l
mg/l
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/16/10 10:52
DateReceived: 08/20/10
Matrix: Aqueous
MCL!
Qualifiers RL QCL Method Analysis Date 1 By
A4500-CI B 08/31/10 t4:12/1jl
D 0.5 E353.2 09/02110 14:13/1jl
1.0 SW8260B 08/30/10 18:041 ilr
D 100 SW8260B 08/27/1019:171 ilr
1.0 SW8260B 08/30/10 18:041 jlr
1.0 SW8260B 08/30/10 18:041 jlr
80-120 SW8260B 08/30/10 18:041 jlr
70-130 SW8260B 08/30/10 18:04 1 jlr
80-120 SW8260B 08/30/10 18:041 jlr
80-120 SW8260B 08/30/10 18:041 ilr
MCl -Maximum contaminant level.
ND -Not detected at the reporting limit.
Page 8 of 25
EN:RGY
J\HCI-l/'lrnl4l! ~~
Helena, MT .11-412-0711 • Bllllnll, MT .'·735-4411 • Casper, WY 811-235-0515
Gillette, WY ....... ·7175 • Rapid City, SD •• 1-112·1225 • Collega StatiM, TX 111-81102211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 10080518-021
Client Sample 10: lW4-5
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Rl -Analyte reporting limit.
QCl -Quality controllimil.
Result
38
7
ND
12
ND
ND
111
100
122
95.0
D -Rl increased due to sample matrix.
Units
mg/l
mg/l
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Reporl Date: 09/03/10
Collection Date: 08/11/10 06:17
DateRecelved: 08/13/10
Matrix: Aqueous
MeL!
Qualifiers RL QCL Method Analysis Date 1 By
A4500-CI B OS/24/10 11 :52 1 Ir
D E353.2 OS/26/10 14:09 1 Ijl
1.0 SW8260B OS/20/10 17:301 i'r
1.0 SW8260B OS/20/10 17:301 i'r
1.0 SWS260B 08/20/1017:301 ilr
1.0 SWS260B OS/20/10 17:301 ilr
S0-120 SW8260B 08/20/10 17:30 1 ilr
70-130 SW8260B OS/20/10 17:301 ilr
S SO-120 SWS260B OS/20/10 17:301 ilr
80-120 SW8260B OS/20/10 17:301 jlr
MCl - Maximum contaminant level.
ND -Not detected at the reporting limit.
S -Spike recovery outside of advisory limits.
Page 24 of 52
EN:RGY
I. ~. C.J : 41"\ r.J ~ , ,; ,;
Helena, MT 171-472-8711 • BUllnlS, MT 801·135-44.1 -Casper, WY .... U5-051I
GillBIt" VlfIl ..... ·7175 · Rapid City, SD ... ·112-1225 . CoIISlaStIHon,1X 11"'1~2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-030
Client Sample 10: TW4-5R
Anal~s
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr; 1,2-0ichlorobenzene-d4
Surr: Oibromolluoromethane
Surr: p-Bromolluorobenzene
Surr: Toluene-d8
Report
Definitions:
RL -Analyte reporting limit.
OCL -Quality control limit.
Result
NO
NO
NO
NO
NO
NO
111
92.0
119
94.0
Units
mglL
mglL
ugiL
ugiL
ugll
ugll
%REC
%REC
%REC
%REC
Qualifier. RL
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 0811 0/1 0 12:50
DateReceived: 08/13/10
Matrix: Aqueous
MCU
QCL Method Analysis Date 1 By
A4500-CI B 08/24/10 12:1311r
E353.2 08/26/10 14:441 Iii
SW8260B 08/20/10 16:20 1 ilr
SW8260B 08/20/10 16:20 1 ilr
SW8260B 08120/10 16:20/ ilr
SW8260B 08/20/1016:201 ilr
SW8260B 08/20/1016:201 ilr
SW8260B 08/20/10 16:20/ ilr
SW8260B 08/20/10 16:201 i'r
SW8260B 08/20/10 16:201 ilr
MCl - Maximum contaminant level.
NO -Not detected at the reporting limil.
Page 33 of 52
EN:RGY
AH .J1~""Or#I~:,
www.energyllb.com
MIIIfIaI EnIIIIiI&w,.. 1151
1fll1en., MT '17-412-8711 • Bllllnls, MT 80.-731-4411 • Casper, WY ... 135-111 I
G111eth, W1 ....... -7171 . Rapid City, SD 118-172·1221 · Colli,. Station, TX 1 ........ 221.
LABORATORY ANAL VTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518'027
Client Sample 10: 1W4-6
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLAnLE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definition.:
Al -Analyte reporting limit.
QCl -Quality control limit.
Result
31
3.9
ND
630
ND
ND
105
112
111
98.0
D -RL increased due to sample matrix.
Units
mg/l
mg/l
ug/L
ug/L
ug/L
ug/L
%AEC
%AEC
%AEC
%AEC
Report Date: 09/03/10
Collection Data: 08/12/10 08:07
DateRecelved: 08/13/10
Matrix: Aqueous
MeL!
Qualifiers RL QCL Method Analysis Date / By
1 A4500-CI B 08/24/10 12:07/ Ir
D 0.2 E353.2 08/26/1014:36/ Iii
1.0 SW8260B 08/26/10 18:56/ jlr
D 100 SW8260B 08/21110 04:07/ ilr
1.0 SW8260B 08/26/10 18:56 / ilr
1.0 SW8260B 08/26/10 18:56 / ilr
80-120 SW8260B 08/26/10 18:56/ ilr
70-130 SW8260B 08/26/10 18:56 / ilr
80-120 SW8260B 08/26/1018:58/ jlr
80-120 SW8260B 08/26/1018:56 / ilr
MeL -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 30 of 52
EN:RGY -..
Helena, lIT 111-412-8111 • 8i1l1n.1, MY sal·m·44'1 • Cuper, WY 811-235-151.
/' 1-1 \ • : 1/\ r r ~'<I t f ' GlllettlJ. WY 11 ..... ·7115 • Rapid City, SD 111-172·1225 • CoIle,1 Station, 1X 1 .... '10221.
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 10080518-036
Client Sample 10: TW 4-6R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Dibromolluoromethane
Surr: p-Bromolluorobenzene
Surr: Toluene-d8
Report
DefinitIons:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
NO
NO
NO
6.2
NO
NO
114
119
113
97.0
Units
mgll
mgll
ugll
ugll
ugll
ugll
%REC
%REC
%REC
%REC
QualIfiers RL
1
0.1
1.0
1.0
1.0
1.0
80-120
70-130
SO-120
80-120
Report Date: 09/03/10
Collecllon Date: 08/11/10 10:56
DaleRecelved: 08/13/10
Matrix: Aqueous
MeL!
QCL Method Analysis Oat. I By
A4500-C1 B 08/24/10 12:37 Ilr
E353.2 08/26/10 15:0611il
SW8260B OS/20/10 23:581 ilr
SW8260B OS/20/10 23:581 ilr
SWS260B 08/20/10 23:5SI ilr
SWS260B 08/20/10 23:58 I ilr
SW8260B OS/20/10 23:581 ilr
SW8260B 08/20/1023:581 ilr
SW8260B 08/20/10 23:58 1 jlr
SW8260B 08/20/10 23:581 ilr
MCl • Mll)(imum contaminant level.
NO -Not detected at the reporting limit.
Page 39 of 52
EI\ERGY
_!\!10Id ,l f'I-lI" •
www.energylab.com
ABI/ffIRJ ~ SIIICI IIfZ
Hulena, MT 817-472-0711 • Billings, MT 801-735-4489 • Casper, WY 888-235-0515
GillattB, WV 818-&8&-7175 • Rapid City, SD &88-172-1225 • College Slation, TX 8&8-690-2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
Denison Mines USA Corp
3rd Quarter Chloroform
LabID: C 10080785-004
Client Sample ID: TW4-7
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dlchlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
36
3.9
1.1
1500
NO
ND
104
111
111
86.0
o -Rl increased due to sample matrix.
Units
mg/l
mg/l
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/18/10 08:27
DateReceived: 08/20/1 0
Matrix: Aqueous
MCll
Qualifiers Rl QCl Method Analysis Date I By
A4500-CI B 08/31/10 14:08/1jl
D 0.5 E353.2 09/02110 14:00 /ljl
1.0 SW8260B 08/30/10 20:27 I jlr
o 100 SW8260B 08/27/10 18:07 I jlr
1.0 SW8260B 08/30/10 20:27 I jlr
1.0 SW8260B 08/30/10 20:27 I jlr
80-120 SW8260B 08/30/10 20:27 I jlr
70-130 SWB260B OB/30/10 20:27 I jlr
80-120 SW8260B OB/30/10 20:27 I jlr
80-120 SWB260B OB/30/10 20:27 I jlr
MCl -Maximum contaminant level.
ND -Not detected at the reporting limit.
Page 6of25
EN:RGY
• ,"'! ~) I , ,,1 {'I' I •
www.energylab.com
AMJytIaI EIuIIwIa au IISI
Helena, tIT 871-472-0711 • Billings, tIT 800-735-4419 • Casper, WY 888-235-0515
Gillatia, WY 81&-688-7175 • Rapid City, SD 888-172-1225 • College Station, TX 888-698-2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-013
Client Sample ID: TW4-7R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
NO
NO
NO
1.1
NO
NO
102
106
108
86.0
Units
mg/l
mg/l
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Qualifiers Rl
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/17/1008:36
DateReceived: 08/20/10
Matrix: Aqueous
MCll
QCl Method Analysis Date 1 By
A4500-CI B 08/31/10 14:37 IIjl
E353.2 09/02110 14:35/1jl
SW8260B 08/30/1022:141 jlr
SW8260B 08/30/1022:141 jlr
SW8260B 08/30/10 22:141 jlr
SW8260B 08/30/10 22:141 jlr
SW8260B 08/30/10 22:141 jlr
SW8260B 08/30/1022:141 jlr
SW8260B 08/30/1022:141 jlr
SW8260B 08/30/1022:141 jlr
Mel -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 15 of 25
EI\ERGY
:\h, ... U/,rr'Ut-~
Halena, lIT 117 ... 12-0111 • 81111n.1, lIT 801-731·4488 • Casper, W1811-231-1515
GUlette, WY ....... -7175 • Rapid City, SD 01-172-1225 • Colfel. Station, TX 1 .... 11-221.
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518·007
Client Sample 10: TW4-8
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Deflnltlons:
Rl -Analyte reporting limit.
OCl -Quality control limit.
Result
45
NO
NO
NO
NO
NO
106
109
109
a8.0
Units
mg/l
mg/l
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Quallflers Rl
1
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 08/11/1006:48
DateRecelved: 08/13/10
Matrix: Aqueous
MCU
QCl Method Analysis Date I By
A4500-CI B 08/24/10 11 :06 Ilr
E353.2 08/26/10 13:16/1il
SW8260B 08/18/10 17:07 / ilr
SW8260B 08/18/10 17:07 I ilr
SWa260B 0811 a/1 0 17:07 I ilr
SW8260B 08/18/10 17:07/ ilr
SW8260B 08/18/1017:07 I ilr
SW8260B 08118110 17:07 I ilr
SW8260B 08/18/10 17:07 / ilr
SW8260B 08/18/10 17:071 ilr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 10 of 52
EI\ERGY
/'I. HI Jtl/ ... IOHI'-~'
www.energylab.com
AM/ftlalbaIIIcI.a. 1111
Helen., tIT 177-412-0111 • Blllln,I, Mr 11.-131-4488 • Casper, wr 888-235-0111
GIllIIIte, WY 8.1-111-7171 • Rapid City, SD 811-172-1225 • CoIleg8 Station, TX 111-61~2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab ID:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C1008051S-017
Client Sample ID: TW4-SR
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1 ,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Rl -Analyte reporting limit.
QCl -Quality conlrollimit.
Result
NO
0.1
NO
NO
NO
NO
101
111
105
89.0
Units
mgll
mgll
uglL
ugll
ugll
uglL
%REC
%REC
%REC
%REC
Qualifiers Rl
1
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: OS/10/10 OS:40
DateRecelved: 08/13/10
Matrix: Aqueous
MCW
QCl Method Analysis Date I By
A4500-CI B 08/24/10 11 :36 /lr
E353.2 08/26/10 13:56 Iljl
SW8260B 08/19/1003:10 I jlr
SW8260B 08/19/10 03:10 I jlr
SW8260B 08/19/10 03: 10 I jlr
SW8260B 08/19/10 03:10/ jlr
SW8260B 08/19/10 03: 10 / jlr
SW8260B 08/19/10 03:10/ jlr
SW8260B 08119/10 03: 1 0 / jlr
SW8260B 08119/1003:101 jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 20 of 52
EN:RGY
to '-t')flA rnUlf ~,
KelQqa, NT 817-472·0711 • Bllllnls, tIT 881·731-44 •• • Cuper, WY ..... 235-.. 15
GII/ette, Wf 111-188·7175 • Repid City, SD 1111-172·1225 . CollelaStJlIon, IX ...... 1).2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-008
Client Sample 10: lW4-9
Analyses
MAJOR IONS
Chloride
Nitrogen, Nilrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon letrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
DefinHlona:
Rl -Analyte reporting limit.
QCl -Quality coniroilimit.
Result
40
1.2
NO
NO
NO
NO
104
105
109
87.0
o -AL increased due to sample matrix.
Units
mgll
mgll
ugll
ugll
ugll
ugll
%REC
%REC
%REC
%REC
Report Date: 09/03/10
Collection Date: 08/11/10 06:32
DateReceived: 08/13/10
Matrix: Aqueous
MeLJ
Qualifiers RL QCL Method Analysis Date I By
A4500-CI B 08/24/10 11 :08 Ilr
0 0.2 E353.2 08/26/1013:19/ Iii
1.0 SW8260B 08/18/10 21 :50 I ilr
1.0 SW8260B 08/18/10 21 :50 / jlr
1.0 SW8260B 08118/10 21 :50/ ilr
1.0 SW8260B 08/18/10 21 :50 I ilr
80-120 SW8260B 08/18/10 21 :50 / ilr
70-130 SW8260B 08/18/10 21 :50 / ilr
80-120 SW8260B 08/18/10 21 :50 I ilr
80-120 SW8260B 08/18/10 21 :50 / jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 11 of 52
EN:RGY
~'\1-iOrII\T()HI~ -:~
Halena, MT 177-472"',11 • 9illln.l, MT 111-735-4411 • Casper, 'NY.II-23H515
GUletta, WY 11 .. 1.-1111 • Rapid City, SD 111-172-1225 • Colleg. Station, TX 811-1ID-2218
lABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-018
Client Sample 10: TW4-9R
Analyas
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Pleport
Definitions:
Rl -Analyte reporting limit.
OCl -Quality control limit.
Result
ND
ND
ND
ND
ND
ND
101
108
105
88.0
Units
mg/l
mg/l
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Qualifiers RL
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 08/10/1009:27
DateRecelved: 08/13/10
Matrix: Aqueous
MCU
QCL Method Analysis Date 1 By
A4500-CI B 08/24/10 11 :38 1 Ir
E353.2 08/26/10 14:01/1jl
SW8260B 08/19/1003:46 /jlr
SW8260B 08/19/1003:48 /1Ir
SW8260B 0811911 0 03:46 1 jlr
SW8260B 08119/10 03:46 1 jlr
SW8260B 08119/10 03:46 1 IIr
SW8260B 08119/10 03:461 Ilr
SW8260B 08/19/10 03:46 1 jlr
SW8260B 0811911 0 03:46 1 llr
Mel -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 21 of 52
EI'ERGY Halena, 1fT 171-472-11711 • Blmnl!, 1fT IIGI·l31-44 •• • Casper, WV .... 235-1515
.... ':r2"' .. \ICIHF·; Gillette, WV ....... ·1115 • Rapid CItr, SD ..... 172·1225 • CDllels Station, TX ......... 2211
lABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-025
Client Sample 10: TW4-10
Analyses
MAJOR IONS
Chloride
Nitrogen, Nilrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
DefInitions:
RL -Analyte reporting limit.
QCL -Quality control limit.
Result
38
0.8
ND
100
ND
ND
100
102
105
99.0
D -RL increased due to sample matrix.
Units
mg/L
mg/L
ug/L
ug/L
ug/L
ug/L
%REC
%REC
%REC
%REC
Report Date: 09/03/10
Collection Date: 08/12/10 07:57
DateRecelved: 08/13/10
Matrix: Aqueous
MeL'
Quallfle,s RL QCL Method Analysis Date I By
A4500-CI B 08/24/10 12:02 Ilr
0.1 E353.2 08/26/10 14:26 I Iii
1.0 SW8260B 08/26/10 17:46 / ilr
D 20 SW8260B 08/21/10 02:56 I ilr
1.0 SW8260B 08/26/1017:46/ ilr
1.0 SW8260B 08/26/10 17:46 / ilr
80-120 SW8260B 08/26/10 17:46/ ilr
70-130 SW8260B 08/26/1017:461 ilr
80-120 SW8260B 08/26/10 17:46 / jlr
80-120 SW8260B 08/26/10 17:46 I jlr
MeL -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 28 of 52
EI\ERGY Halena, lIT 117-412-41111 • Bllllnll, lIT 801·131-4411 • Caspar, WY .... 23~I515
I\H · ... ftllrr'll· :,. Gliletta, V« .1&-181·7175 · Rlpid City, SD 111-112·1225 . CollelaSlJtlon, TX ..... 111-2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-034
Client Sample 10: TW4-10R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLAnLE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: l,2-0ichlorobenzene-d4
Surr: Oibromolluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
DetlnHlons:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
NO
NO
NO
NO
NO
NO
120
128
118
94.0
Units
mg/l
mg/l
ug/l
ug/l
ugll
ug/l
%REC
%REC
%REC
%REC
Quallfle,s RL
1
0.1
1.0
1.0
1.0
1.0
BO-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 08/11/10 09:30
DateRecelved: 08/13/10
Matrix: Aqueous
MCU
QCL Method Analysis Date I By
A4500-CI B 08124/10 12:34/1r
E353.2 08/26/10 15:01 lJil
SW8260B OB/20/10 19:50 I ilr
SWB260B OB/20/10 19:50 I ilr
SW8260B OB/2011 0 19:50 I ilr
SW8260B 08/20/10 19:50 I ilr
SWB260B 08/20/10 19:50 I ilr
SW8260B 08120/10 19:50 I jlr
SW8260B 08/20/10 19:50 I ilr
SW8260B OB/20/10 19:50 I ilr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 37 of 52
EN:RGY
....... H(:.HhrCH-4.t C". E www.energylab.com 1MI/fItII,......-'lIZ Halena, lIT 177-472-8711 • Bllllnll, lIT 881-135-"1' • Casper, WY .... 235-•• 11
G1II1ttt, WY 1.1-.11-1171 • Rapid City, SD 111-'12-1225 • College Station, TX 1 ... 81.2211
LABORATORY ANAL VTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-028
Client Sample 10: lW4-11
Analyses
MAJOR IONS
Chloride
Nitrogen, Nltrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
DefInitions:
Rl -Analyte reporting limit.
OCl -Quality control limit.
Result
43
6.7
NO
800
NO
NO
99.0
105
108
97.0
o -RL increased due to sample matrix.
Units
mgll
mgll
ugll
ugll
ugll
ugll
%REC
%REC
%REC
%REC
Report Date: 09/03/10
Collection Date: 08/12/10 08:18
DateRecelved: 08/13/10
Matrix: Aqueous
MCW
Qualifiers RL QCL Method Analysis Date I By
A4500-CI B 08/24/10 12:0911r
o 0.5 E353.2 08/26/10 14:39 / Ijl
1.0 SW8260B 08/26/1019:311 jlr
o 100 SW8260B 08/26/10 16:01 I jlr
1.0 SW8260B 08/26/1019:311 jlr
1.0 SW8260B 08/26/10 19:31 I jlr
80-120 SW8260B 08/26/1019:311 jlr
70-130 SW8260B 08126/10 19:31 I jlr
80-120 SW8260B 08/26/10 19:31 I jlr
80-120 SW8260B 08/26/10 19:31 I jlr
Mel -Maximum contaminanllevel.
NO -Not detected at the reporting limit.
Page 31 of 52
EN:RGY
IH·" dl/d r)"r· .,
www.anergylab.com
.... ~ ... 'IU
Hallna,lIIT 117-412-1J11 • Bllllnll,lIIT .1-735-44" • Casper, WY .... 235-.515
Glliatte, WY ......... J115 • Rapid City, SD 111-172·1225 • Collage Station, TX 111-&11-2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-037
Client Sample 10: TW4-11 R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLAnLE ORGANIC COMPOUNDS
Carbon tetrachloride
Chlor%rm
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
o.flnltlons:
Rl -Analyta reporting limit.
aCl -Ouality control limit.
Result
ND
ND
ND
2.1
ND
ND
114
113
116
96.0
Units
mgll
mgll
ugll
ug/l
ugll
ugll
%REC
%REC
%REC
%REC
Qualifiers Rl
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 08/11/1012:51
Dat.Recelved: 08/13/10
Matrix: Aqueous
MCU
QCl Method Analysis Date I By
A4500-CI B 08/24110 12:3911r
E353.2 08/26/10 15:16/1jl
SW8260B 08/21/10 00:341 jlr
SW8260B 08/21/1000:341 jlr
SW8260B 08/21/1000:341 jlr
SW8260B 08/21/1000:341 jlr
SW8260B 08/21/10 00:34 1 jlr
SW8260B 08/21/10 00:34 1 jlr
SW8260B 08/21/1000:341 jlr
SW8260B 08/21/10 00:341 jlr
MCl • Maximum contaminant level.
ND -Not detected attha reporting limit.
Page 40 of 52
EN:RGY
"'t \Ofl;dOI~It: .,
Helena, MT 171-472"'711 • Billings, MT 881·131-4411 • Casper, wr 1"'23~1511
GIIIIlte, WY 111-.. 8·7175 • Rapid City, SD 118·112·1221 • Coliaie Station, TX ........ 2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 10080518-002
Client Sample 10: TW4-12
Analysn
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: l,2-Dichlorobenzene-<l4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
RL -Analyte reporting limit.
OCL -Quality control lim II.
Result
35
9
ND
NO
ND
ND
106
108
108
87.0
o -Rl increased due to sample matrix.
Units
mgll
mgll
ugll
ugll
ugll
ug/L
%REC
%REC
%REC
%REC
Report Date: 09/03/10
Collection Date: 08/10/1007:46
DateRecelved: 08/13/10
Matrix: Aqueous
yeLl
Qualifiers RL QCL Method Analysis Date I By
A4500-CI B 08/24/10 10:51 IIr
D E353.2 08/26/10 12:59 I Ijl
1.0 SW8260B 08/18/1014:10 I jlr
1.0 SW8260B 08/18/1014:10 I ilr
1.0 SW8260B 08/1811014:10 I ilr
1.0 SW8260B 08/18/10 14:10 I ilr
80-120 SW8260B 08/18/1014:10 I ilr
70-130 SW8260B 08/18/1014:10 I ilr
80-120 SW8260B 08/18/1014:10 I ilr
80-120 SW8260B 08/18/1014:10 I ilr
MCl -Maximum contamlnantlavel.
ND -Not delected altha reporting limit.
Page 5 of 52
EN:RGY
1'.'-i·::;,;,..,rr.'H~ ~,
www.anergyllb.com
W/fIIaJ~-'111 Halena, MT 177-471-8711 • Bllllnls, MT 10'-735-« •• • Casper, WY .'I-23~D51I
GlIlIIItI. V« .. 1-.11-7175 · Rapid City, SO 11 ... 72·1225 . CoIlq8Station. TX 8 ..... 18-221.
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-012
Client SamplelD: TW4-12R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
SUrf: l,2-0ichlorobenzene-d4
Su,,: Dibromolluoromethane
SUIT: p-Bromofluorobenzene
SUIT: Toluene-d8
Report
De"nl1lons:
Rl -Analyte reporting limit.
OCl -Quality control limit.
Result
NO
0.1
NO
NO
NO
NO
102
104
109
87.0
Units
mIVl
mIVl
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Quallflera RL
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 08/0911 0 09:28
DateRecelved: 08/13/10
Matrix: Aqueous
Mew
QCl Method Analysis Date I By
A4500-CI B 08/24/10 11 :26 Ilr
E353.2 08/26/10 13:36 Iljl
SW8260B 08/19/1000:121 jlr
SW8260B 08/19/1000:121 jlr
SW8260B 08/1911000:121 jlr
SW8260B 08/19/10 00: 12 1 jlr
SW8260B 08/19/10 00: 12 1 jlr
SW8260B 08/19/1000:121 jlr
SW8260B 08/19/1000:121 jlr
SW8260B 08/19/1000:121 jlr
MCl -Maximum contaminant level.
ND -Not detected at the reporting limit.
Page 15 of 52
EN:RGY
, I\HUI ~j\ T()f~lt S
\VWW,enerlYlab,com
~lrIIIIM" ,lit
Helena, M1'177-472-GJt1 • Bllllnll, MT 18.·135-4481 • Casper, W't 8.1-235-1511
Gliletta, WY ....... ·7115 • Rapid City, SD 18 ... 12·1225 • Colle,. Station, TX 8 ..... 11J.2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 10080518-003
Client Sample 10: TW4-13
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
SUIT: Dibromofluoromelhane
SUIT: p-Bromofluorobenzene
SUIT: Toluene-d8
Report
DefInition.:
RL -Analyle reporting limit.
OCL -Quality control limit.
RHuit
55
5.6
ND
ND
ND
ND
105
109
106
88.0
D -RL increased due 10 sample matrix.
Units
mglL
mglL
uglL
uglL
uglL
uglL
%REC
%REC
%REC
%REC
Report Date: 09/03/10
Collection Date: 08/10/10 07:56
DateRecelved: 08/13/10
Matrix: Aqueous
MCL!
Qualifiers RL QCL Method Analysis Date I By
1 A4500-C/B 08/24/10 10:56/1r
D 0.5 E353.2 08/26/10 13:01 Iljl
1.0 SW8260B 08/18/1014:461 jlr
1,0 SW8260B 08/18/10 14:46 I jlr
1.0 SW8260B 08/18/1014:461 jlr
1.0 SW8260B 08/18/10 14:46 I jlr
80-120 SW8260B 08/18/1014:461 jlr
70-130 SW8260B 08/18/1014:461 jlr
80-120 SW8260B 08/18/1014:461 jlr
80-120 SW8260B 08/18/1014:461 jlr
MeL -Maximum contaminant level.
ND -Not detected at the reporting limit.
Page 6 of 52
EN:RGY
I\ftO'U\IDHlf S
Halen., MT 111-472-8711 • Billlnls, MT 181·131-441. • Casper, W'/81 .. 235-8S15
GIIIIIlta, WY ....... ·m5 • Rapid City, SD .... 112·1225 • Collell SlatiM,1X 111-1111-2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-013
Client SamplelD: TW4-13R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: l,2-0ichlorobenzene-d4
Surr: Oibromolluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definition.:
RL -Analyte reporting limit.
QCl -Quality control limit.
Result
NO
0.1
NO
NO
NO
NO
103
108
108
89.0
Units
mg/l
mg/l
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Qualifiers RL
1
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 08/09/10 10:26
DeteRecelved: 08/13/10
Matrix: Aqueous
MeLl
OCL Method Analysis Date 1 By
A4500-CI B 08/24/10 11 :27 Ilr
E353.2 08126/10 13:39 / Ijl
SW8260B 08l19/10oo:48/jlr
SW8260B 08/19/10 00:481 ilr
SW8260B 08/1911 0 00:48 I jlr
SW8260B 08/19/1000:481 ilr
SW8260B 08119110oo:48 /llr
SW8260B 08l19110oo:48/llr
SW8260B 08119/10 00:48 1 jlr
SW8260B 08119/1 0 00:481 Jlr
MCl -Maximum contaminantlavel.
NO -Not detected attha reporting limit.
Page 16 of 52
EN:RGY
.... ,..;QBl'rc,HIt: .~
www.energyllb.com
IMI/*IJ~_'"
Helena, MT 171-412-8711 • 81111nll, MT BGI-735-4411 • Casper, WY .11-231-1511
Gin., WY 1 ....... 1175 . Rapid CIty,SD 111-172-1%25 . CDilailStation, TX ..... 11-2211
lABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 1008051 8-004
Client Sample 10: TW4-14
Analyses
MAJOR IONS
Chloride
Nitrogen, Nilrate+Nitrite as N
VOLAnL& ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromolluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-dS
Report
Dellnltlon.:
RL -AnaJyte reporting limit.
QCL -Quality control limit.
Result
35
2.S
NO
NO
NO
NO
106
109
107
88.0
o -RL increased due to sample matrix.
Units
mglL
mglL
uglL
uglL
uglL
uglL
%REC
%REC
%REC
%REC
Report Date: 09/03/10
Collecllon Date: 08110/1008:06
DateRecelved: 08/13/1 0
Matrix: Aqueous
MeLJ
Quallflers RL QCL Method Analysis Date I By
A4500-CI B 08l24/1010:57/1r
0 0.2 E353.2 OS/26/10 13:04 Iljl
1.0 SW8260B OS/18/10 15:211 jlr
1.0 SW8260B 08/18110 15:21 I jlr
1.0 SW8260B 08/18/10 15:211 Ilr
1.0 SWS260B 08/18/1015:211 jlr
80-120 SWS260B 08/18/1015:211 jlr
70-130 SWS260B OS/1S/10 15:21 I jlr
SO-120 SW8260B 08/1811015:211 jlr
80-120 SW8260B 08/18/1015:211 jlr
Mel -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 7 of 52
EN:RGY
AHUJtl\fCI"1l ::.
www.energyfeb.com
..,..ClclllllaSlw'1U
Helena, lIT 117-472-11711 • Blllln,s, lIT .1-731-441. • Casper, WY 811-23t-151 •
Gillette, VIY "1-.11-7111 • Rapid City, SD 11"'72-1225 • CDlla,. SlltiOll, TX ....... 1J.2Z1.
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-014
Client Sample 10: TW4-14R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Detlnhlone:
RL -Analyte reporting limit.
OCL -Quality control limit.
Result
NO
NO
NO
NO
NO
NO
102
102
108
88.0
Units
mglL
mglL
uglL
uglL
uglL
uglL
%REC
%REC
%REC
%REC
Qualifier. RL
1
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 08/09/10 12:26
DateRecelved: 08/13/10
Matrix: Aqueous
MCU
QCL Method Analysis Date I By
A4500-CI B 08/24/10 11 :31 IIr
E353.2 08/26/1013:4111il
SW8260B 08/19/10 01 :24 I ilr
SW8260B 08/19/10 01 :241 ilr
SW8260B 08/19/10 01 :24 I jlr
SW8260B 08/19/10 01 :24 / ilr
SW8260B 08/19/10 01 :24 I ilr
SW8260B 08/1911 0 01 :24 / jlr
SW8260B 08/19/10 01 :24 I ilr
SW8260B 08/19/10 01 :24 I ilr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 17 of 52
EN:RGY
•• \11(')'1/<.1 ';In· .
www.energylab.com
IM/fIIaI ~ SIIIu 'lSI
Halena, MT 871-412-0711 • Billings, MT 801-735-4489 • Casper, WY 888-235-0515
Gillatte, WY 81&-186-7175 • Rapid City, SD 888-&72-1225 • College Station, 1X 888-&90-2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab ID:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-003
Client Sample ID: TW4-15
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
49
0.6
ND
2200
NO
21
104
109
111
88.0
D -Rl increased due to sample matrix.
Units
mg/l
mgll
ugll
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/16/10 14:15
DateReceived: 08/20/1 0
Matrix: Aqueous
MCLI
Qualifiers RL QCL Method Analysis Date 1 By
A4500-CI B 08/31/10 14:0511jl
0.1 E353.2 09/02110 13:5811jl
1.0 SW8260B 08/30/10 17:29 1 jlr
0 100 SWB260B 08/27/10 17:321 jlr
1.0 SW8260B 08/30/10 17:291 jlr
1.0 SWB260B 08130/10 17:29 1 jlr
80-120 SW8260B 08/30/10 17:291 jlr
70-130 SW8260B 08/30/10 17:291 jlr
80-120 SWB260B 08/30/10 17:291 jlr
80-120 SW8260B 08/30/1017:291 jlr
MCl -Maximum contaminant level.
ND -Not detected at the reporting limit.
Page 5 of 25
EN:RGY
I\H~;,"'Ar()HI'-OJ
www.anergyllb.com f
,..".. baIIIICII SIIIII 1m
Helena, lIT Bl1-472-0111 • Blilingl, MT BGI-735-".' • Casper, WY 1.1-235-0515
GllleIt!, WY 11&-111-1115 • Rapid City, SD .11-172-1225 • Collele Station, 1X 1.1-110-2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform
C10081012-002
Client Sample ID: TW4-16
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLAnLE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
SUIT: 1,2-Dichlorobenzene-d4
Surr: Dlbromofluoromethane
SUIT: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Deffnltlons:
Al -Analyte reporting limit.
OCl -Quality control limit.
Result
72
4.6
ND
4.3
ND
ND
111
119
114
92.0
D -Rl Increased due to sample matrix.
Units
mgll
mgll
ug/l
ugll
ugll
ug/l
%REC
%REC
%REC
%REC
Report Date: 09/17/10
Collection Date: 08/24/1012:32
DateRecelved: 08/27/10
Matrix: Aqueous
MCU
Qualifier. RL QCL Method Analysis Date 1 By
1 A4500-CI B 09/07/10 15:41 /lr
D 0.2 E353.2 09/06/10 16:11 /Iii
1.0 SW8260B 09/02110 01 :06 1 jlr
1.0 SW8260B 09/02/10 01 :06 1 ilr
1.0 SW8260B 09/02110 01 :06 1 jlr
1.0 SW8260B 09/02110 01 :06 1 ilr
80-120 SW8260B 09/02110 01 :06 1 ilr
70-130 SWB260B 09/02110 01 :06 1 ilr
60-120 SW6260B 09/02110 01 :061 ilr
80-120 SW8260B 09/02110 01 :061 ilr
MCl -Maximum contaminant level.
ND -Nol detected althe reporting limit.
Page 4 of 17
EI\ERGY
I\H()H;,\rOHIt r=
www.energylab.com
.,..lJaIIIIIw.Ella '161
Halana, NT 177-412-0711 • Bililnss, MT 801·135·44" • Casper, WY 881-23'-0515
Gillette; vt'f ....... ·1115 • Rapid City. SD 11 ... 12·1225 • Collei~Slatlon, IX 81 .... 11-2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform
C1 0081 012-006
Client Sample 10: TW4-16R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromolluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
AL -Analyte reporting limit.
OCl -Qualily control limit.
Result
NO
NO
NO
NO
NO
NO
108
113
113
94.0
Units
mgll
mgll
ugll
ugll
uglL
ugll
%AEC
%AEC
%REC
%REC
Qualifiers RL
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/17/10
Collection Date: 08/23/1009:57
DateRecelved: 08/27/1 0
Matrix: Aqueous
MeLl
QCL Method Analysis Date I By
A4500-CI B 09/07/10 15:50 IIr
E353.2 09/06/10 16:29/ IiI
SW8260B 09/02110 02:56/ ilr
SW8260B 09/02110 02:56/ ilr
SW8260B 09/02110 02:56/ ilr
SW8260B 09/02110 02:56 / ilr
SW8260B 09/02110 02:561 ilr
SW8260B 09/02110 02:56/ ilr
SW8260B 09/02110 02:561 ilr
SW8260B 09/02110 02:56 I ilr
Mel -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page a of 17
EN:RGY
l /\:H)lll\ICI~Jt '.....,
www.energylab.com
AM/JfkaI uun.-sma 1m Helena, tIT 877-472-0711 • Billings, tIT 801-735-4489 • Casper, WV 888-235-0515
Gillatte, WV 81&-888-7175 • Rapid City, SD 888-172-1225 • Collage Station, TX 818-890-2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-001
Client Sample ID: TW4-17
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromolluorobenzene
Surr: Toluene-d8
Report
Definitions:
RL -Analyte reporting limit.
QCL -Quality control limit.
Result
28
NO
NO
NO
NO
NO
101
124
109
94.0
Units
mg/L
mg/L
ug/L
ug/L
ug/L
ug/L
%REC
%REC
%REC
%REC
Qualifiers RL
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/16/10 13:40
DateReceived: 08/20/10
Matrix: Aqueous
MCL!
QCL Method Analysis Date 1 By
A4500-CI B 08/31/10 14:00/ljl
E353.2 09/02110 13:53/1jl
SW8260B 08/27/10 23:591 jlr
SWB260B 08/27/10 23:591 jlr
SW8260B 08/27/1023:591 jlr
SW8260B 08/27/10 23:591 jlr
SW8260B 08/27/1023:591 jlr
SW8260B 08/27/1023:591 jlr
SW8260B 08/27/1023:591 jlr
SW8260B 08/27/1023:591 jlr
MCL -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 3 of25
EI\ERGY
I\Huf,ll\r(";llIf ~
www.enerlYlab.com
IItIIfIWIr.......a.. '111
Helena, MT 177-412-0711 • BllllnlS, MT 801-135-4411 • Casper, Yf( 811-235-8515
SHlIfta, W'f ......... 7175 • Rapid City, SD ..... 72-1225 • Collage Station, 1X ...... 1~221.
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 10080518-023
Client Sample 10: TW4-18
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: l,2-0ichlorobenzene-{j4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-{j8
Rl -Analyte reporting limit.
OCl -Quality control limit.
Result
37
9
NO
29
NO
NO
117
111
122
91.0
o -RL increased due to sample matrix.
Units
mgll
mgll
uglL
uglL
uglL
ugll
%REC
%REC
%REC
%REC
Report Date: 09/03/10
Collection Date: 08/12/10 07:20
DateRecelved: 08/13/10
Matrix: Aqueous
MCLJ
Qualifiers RL QCL Method Analysis Date I By
A4500-C1 B 08/24/10 11 :56 Ilr
0 E353.2 08/26/1014:21 I Iii
1.0 SW8260B 08/21/1001 :441 ilr
1.0 SW8260B 08/21/10 01 :441 ilr
1.0 SW8260B 08/2111 0 01 :441 ilr
1.0 SW8260B 08/21/10 01 :441 ilr
80-120 SW8260B 08/21/10 01 :441 ilr
70-130 SW8260B 08/21/10 01 :441 ilr
S 80-120 SW8260B 08/21/10 01 :44 I ilr
80-120 SW8260B 08/21/10 01 :441 ilr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
S -Spike recovery outside of advisory limits.
Page 26 of 52
EN:RGY
• "\. " ~ r ,." J ('"';, J t ~ ';.
www.energylab.com ... ,.......,'111 Halena, MT .77-472-0711 • Bllllnls, MT sal·13S-4411 • Casper, 'iN .... 23 ... S1.
8111II1II, WVHl-I .... 11l5 . Rapid City, SD ""'12-1225 • Collela StaHon, TX ...... 111-221 •
LABORATORY ANALYTICAL REPORT
Client:
ProJect:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 201 0
C10080518-032
Client Sample 10: TW4-18R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: l,2-0Ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
"-port
DefInitions:
RL -Analyte reporting limit.
aCL -Quality control limit.
Result
NO
NO
NO
NO
NO
NO
114
98.0
113
96.0
Units
mg/L
mg/L
ug/L
ug/L
ug/L
ug/L
%REC
%REC
%REC
%REC
Quallfl .... RL
1
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 08/11/10 07:53
DateRecelved: 08/13/10
Matrix: Aqueous
MCU
QCL Method Analy.l. Date I By
A4500-CI B 08/24/10 12:30 Ilr
E353.2 08/26/10 14:56/1jl
SW8260B 08/20/10 18:40 I jlr
SW8260B 0812011 0 18:40 I jlr
SW8260B 0812011 0 18:40 1 jlr
SW8260B 08120/1 0 18:40 r jlr
SW8260B 08f20/10 18:40 I jlr
SW8260B 08120/1 0 18:40 I jlr
SW8260B 0812011 0 18:40 Ijlr
SW8260B 08120/10 18:40 r jlr
MCL -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 35 of 52
EN:RGY
\-\()"/'1 '~ /-1;1 ~
www.energytab.com
AIMIyII&M EsuIwla SIIIa 1152
Helena, MT 877-472-0711 • Billings, MT 800-735-4488 . Casper, WY 888-235-0515
Gillette, WY 816-688-7175 • Rapid City, SD 888-112-1225 • Collage Station, 1X 888-&80-221.
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-002
Client Sample 10: TW4-19
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0Ichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
RL -Analyte reporting limit.
QCL -Quality control limit.
Result
142
5.9
4.9
2000
NO
NO
104
103
110
86.0
o -Rl increased due to sample matrix.
Units
mg/L
mg/L
ug/L
ug/L
ug/L
ug/L
%REC
%REC
%REC
%REC
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/16/10 09:58
DateReceived: 08/20/10
Matrix: Aqueous
MCll
Qualifiers Rl QCl Method Analysis Date I By
A4500-CI B 08/31/10 14:03 Iljl
o 0.5 E353.2 09/02110 13:55/ Ijl
1.0 SW8260B 08/30/10 16:521 jlr
o 100 SW8260B 08/27/10 16:57/ jlr
1.0 SW8260B 08/30/10 16:52/ jlr
1.0 SW8260B 08/30/10 16:52/ jlr
80-120 SW8260B 08/30/10 16:52/ jlr
70-130 SW8260B 08/30/10 16:521 jlr
80-120 SW8260B 08/30/10 16:521 jlr
80-120 SW8260B 08/30/10 16:52 / jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 4 of 25
EN:RGY
• I·.~(),":'I ::'_HJ •
Helen., liT 811-472-0711 • Billings, MT 801-735-4488 • Casper, WY 888-235-0515
Gillette, WV 81&-&88-1175 . Rapid City, SD 888-&12-1225 . College Station, TX 888-&90-2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-009
Client Sample 10: TW4-20
Analyses
MAJOR IONS
Chloride
Nitrogen, Nilrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
RL -Analyte reporting limit.
QCL -Quality control limit.
Result
196
5.3
12
15000
NO
2.2
102
67.0
109
89.0
o -RL increased due to sample matrix.
Units
mg/L
mg/L
ug/L
ug/L
ug/L
ug/L
%REC
%REC
%REC
%REC
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/16/10 12:22
DateReceived: 08/20/10
Matrix: Aqueous
MCL!
Qualifiers RL QCL Method Analysis Date I By
1 A4500-CI B 08/31/10 14:28 Iljl
o 0.5 E353.2 09/02/10 14:20/ Ijl
1.0 SW8260B 08/30/1019:51/ jlr
o 1000 SW8260B 08/27/10 21 :03 / jlr
1.0 SW8260B 08/30/1019:51/ jlr
1.0 SW8260B 08/30/10 19:51 I jlr
80-120 SW8260B 08/30/1019:511 jlr
S 70-130 SW8260B 08/30/10 19:51 I jlr
80-120 SW8260B 08/30/10 19:51 I jlr
80-120 SW8260B 08/30/1019:511 jlr
MCL -Maximum contaminant level.
NO -Not detected at the reporting limit.
S -Spike recovery outside of advisory limits.
Page 11 of 25
EI\ERGY
.'\HI ... "~/lIOIIH 5
Helena, lilT 117-412-0111 • BllllnlS, MT 101-135-441. • Casper, WY 8 ... 235-lm
Ollllltt, IVY 1.1-... ·7115 • Rapid City, SD 1.I-IJ2·1225 • CoIIe,8 Station, TX 181-1111-221'
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 10080518-024
Client Sample 10: TW4-21
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
278
14
9.2
390
ND
ND
104
104
109
97.0
D -Rl increased due 10 sample matrix.
Units
mgll
mgll
ugll
ugll
ug/l
ugll
%REC
%REC
%REC
%REC
Report DIIte: 09/03/10
Collection Da.e: 08/12/10 07:30
DateRecelved: 08/13/10
Matrix: Aqueous
MCW
Qualifiers RL QCL Method Analysis Date I By
A4500-CI B 08/24/10 11 :59 Ilr
0 E353.2 08/26/10 14:24/1jl
1.0 SW8260B 08126/10 17:11 1 jlr
0 100 SW8260B 08/26/10 15:261 jlr
1.0 SW8260B 08126/10 17:11 I jlr
1.0 SW8260B 08126/1017:11 / jlr
80-120 SW8260B 08126/1017:11 1 jlr
70-130 SW8260B 08126/1017:11 1 jlr
80-120 SW8260B 08126/10 17: 11 I jlr
80-120 SW8260B 08l26/1017:11 /jlr
MeL -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 27 of 52
EI\ERGY
.'I,Ht'i't"rrH'r ~
www.enerlYflb.com
MIJf/JaI~SiAw 1m Helena, MT 177--412-1711 • 81111nlS, MT Il0l-731-44" • Casper, WY .... 235-1515
Gillette, WY.I ..... ·JUS . Rapid City, so •• 1-172·1225 · CoIlegeStalion, TX 11 .... 1-2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 1 0080518-033
Client Sample 10: TW4-21 R
Analyses
MAJOR IONS
Chloride
NItrogen, Nitrate+Nitrile as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definition.:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
NO
NO
NO
NO
NO
NO
117
116
119
97.0
Units
mgil
mgll
ug/l
ug/l
ug/l
ug/L
%REC
%REC
%REC
%REC
Qualifiers RL
1
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Dale: 08/11/10 08:43
DaleRecelved: 08/13/10
Matrix: Aqueous
Meu
QCL Method Analysis Date I By
A4500-CI B 08/24/10 12:33 Ilr
E353.2 08/26/10 14:5911jl
SW8260B 08/20/10 19: 15 / jlr
SW8260B 08/20/10 19:15/ jlr
SW8260B 08/20/1019:151 jlr
SW8260B 08/20/1019:15/ jlr
SW8260B 08/20/10 19: 15 / jlr
SW8260B 08/20/10 19: 15 / jlr
SW8260B 08/20/10 19: 15 / jlr
SW8260B 08/20/1019:15/ jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 36 of 52
EI\ERGY
_Aio-H_1HI\T()I.lIL5
www.energyiab.com
MII1/IUI ttu .... .u.c. 1161
Halena, MT 817-472-0111 • Bllllnls, MT BGI·131·4481 • Casper, WY 811-235-0515
Glllatte, WY 111-... ·1115 • Rapid City, SD 111-112·1225 • ColiDla Slation, TX 811-111)..221.
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform
Cl0081012-003
Client Sample 10: TW4-22
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definition.:
RL -Analyte reporting limit.
QCL -Quality control limit.
Result
130
15
ND
340
ND
ND
112
132
122
96.0
D -Rl increased due to sample matrix.
Units
mg/L
mg/L
ug/L
ug/L
ug/L
ug/L
%REC
%REC
%REC
%REC
Report Date: 09/17/10
Collection Date: 08/24/10 12:21
DateRec:elvec:l: 08/27/10
Matrix: Aqueous
MCU
Qualifiers RL QCL Method Analysis Date I By
D
D
S
S
A4500-CIB 09/07/10 15:4311r
E353.2 09/06/10 16:14 /ljl
1.0 SW8260B 09/0111020:541 jlr
100 SW8260B 09/01/1019:441 jlr
1.0 SW8260B 09/01/10 20:541 jlr
1.0 SW8260B 09/01/10 20:541 jlr
80-120 SW8260B 09/01/10 20:541 jlr
70-130 SW8260B 09/01/10 20:54 / jlr
80-120 SW8260B 09/01/10 20:541 jlr
80-120 SW8260B 09/01/1020:541 jlr
Mel -Maximum contaminant level.
ND -Not detected at the reporting limit.
S -Spike recovery outside of advisory limits.
Page 5 of 17
EN:RGY
~ /\H()nA'('j~~1f ~
www.energylab.com
Mtt/JfIaI EJrdIIa'-' IISI
Helena, MT 117-47Z-07f1 • Billings, MT 881-135·441. • Casper, WY B11-235-0515
GlllaIte, WY 111-181·7175 • Rapid City, SD 111-172·1225 • Collage Stalion, TX ....... 1).2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform
C1 0081 012·007
Client Sample 10: TW4-22R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
DefinitIons:
Rl -Analyte reporting limit.
Qel -Quality control limit.
Result
NO
0,1
NO
NO
NO
NO
110
112
123
92,0
Unlls
mg/l
mg/l
ug/l
ug/l
ugll
ug/l
%REC
%AEC
%REC
%REC
S -Spike recovery outside of advisory limits,
Report Date: 09/17/10
Collection Date: 08123/10 12:34
Dat.Recelved: 08/27/1 0
Matrix: Aqueous
MCW
Qualifiers Rl QCL Method Analysis Dale 1 By
A4500-CI B 09/07/10 15:52/1r
0,1 E353,2 09/06/10 16:31/1jl
1.0 SW8260B 09/02110 03:321 jlr
1,0 SW8260B 09/02110 03:321 jlr
1,0 SW8260B 09/02110 03:32 / jlr
1,0 SW8260B 09/02110 03:321 jlr
80-120 SW8260B 09/02110 03:321 ilr
70-130 SW8260B 09/02110 03:32/ jlr
S 80-120 SW8260B 09/02/10 03:32 1 ilr
80-120 SW8260B 09/02110 03:32 1 jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 9 of 17
EN:RGY
.r.y "lH.\l()Hrt .~
Helena, IT 171-472-0711 • Billings, r.rr aal· 731·4411 • Casper, WY '11-23~1515
GllletIB, YIY U ...... ·7175 • Rapid City, SD 1.1-172·1225 • Colle,s Station, TX UWI1J.2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 10080518·005
Client Sample 10: TW 4-23
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Oibromolluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
DefInitions:
Rl -Analyte reporting limit.
OCl· Quality controllimil.
Result
40
NO
NO
NO
NO
NO
104
111
105
88.0
Units
mgll
mgll
ugll
ugll
ugll
ugll
%REC
%REC
%REC
%REC
Qualifiers Rl
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 08/10/10 06:40
DeteRecelved: 08/13/10
Matrix: Aqueous
MCL/
QCl Method Analysis Date I By
A4500-CI B 08/24/1010:59/1r
E353.2 08/26/10 13:06/1jl
SW8260B 08/18/10 15:56 I jlr
SW8260B 08/1811015:561 jlr
SW8260B 08/1811015:561 ilr
SW8260B 08/18/10 15:561 ilr
SW8260B 08/18/10 15:56 I ilr
SW8260B 08/18/1 0 15:56 I ilr
SW8260B 08/18/10 15:56 I ilr
SW8260B 08/18/10 15:561 ilr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 8 of 52
EI\ERGY
,j\"'UJloil\rr")III( ~
www.energyllb.com
MI/JfIt:II~ .. ,.
Helena, MT 117-472-1111 • Blllln,., MT 101-735-44" • Casper, W1U'-23IH515
Glilettl, WY ........ -1115 • Rapid City, SD 111-.72-1225 • Collaaa Station, TX .... 811-2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-015
ClIent Sample 10: lW4-23R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definition.:
Rl -Analyte reporting limit.
eCl -Quality control limit.
Result
NO
NO
NO
NO
NO
NO
102
107
105
88.0
Units
mgll
mgll
ugll
ugll
ugll
ugll
%REC
%REC
%REC
%REC
Qualifiers Rl
1
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
CollectIon Date: 08/09/10 13:06
DateRecelved: 08/13/10
Matrix: Aqueous
MCU
QCl Method Analysis Date I By
A4500-CI B 08/24/10 11 :33 Ilr
E353.2 08/26/10 13:44 IIi I
SW8260B 08/19/10 01 :59 1 ilr
SW8260B 08/19/10 01 :591 ilr
SW8260B 08/19/10 01 :59 1 ilr
SW8260B 08/19/1001 :591 ilr
SW8260B 08/19/10 01 :59 1 ilr
SW8260B 08/19/10 01 :59 1 ilr
SW8260B 08119/10 01 :59 1 ilr
SW8260B 08/19/10 01 :59 1 ilr
MCl -Maximum contaminanllevel.
NO -Not detected at the reporting limit.
Page 18 of 52
EN:RGY
. I\HOHI\TC 'JH S
www.energylab.cGm
.,..lIaIIIctllu 'IU
Halana, NT '71-472-8711 • Bililnss, MY 801·135-4489 • Caspar, WY 111-23$-1515
GIlIIIttt, W'f •• 1-... ·7175 • Rapid City, SO 111-172·1225 • Collasa Station, TX 111-6.0-2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform
C10081012-004
Client Sample 10: lW4-24
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1 ,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-dB
Al -Analyte reporting limit.
QCl -Quality control limit.
Result
587
31
NO
1.8
NO
NO
111
131
112
96.0
o -Rl increased due to sample matrix.
Units
mgll
mgll
ug/l
ugll
ug/l
ugll
%REC
%REC
%REC
%REC
Report Date: 09/17/10
Collection Date: 08124/10 12:10
DateRecelved: 08/27/10
Matrix: Aqueous
MCU
Qualifiers RL QCL Method Analysis Date 1 By
A4500-CI B 09/07/10 15:47/1r
D E353.2 09/06/10 16:2411il
1.0 SW8260B 09/02110 01 :431 ilr
1.0 SW8260B 09/02110 01 :43 1 ilr
1.0 SWB260B 09/02110 01 :43 1 ilr
1.0 SWB260B 09/0211001 :431 ilr
BO-120 SW8260B 09/02110 01 :43 1 ilr
S 70-130 SW8260B 09/02110 01 :43 1 ilr
80-120 SW8260B 09/02110 01 :43 1 ilr
80-120 SWB260B 09/02110 01 :43 1 ilr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
S -Spike recovery outside of advisory limits.
Page 6 of 17
EI'ERGY
, I\H(JHtl.Jor.,l1l S
www.energylab.com
,.",.. iMIIII&w SIIrt 1m
Halena, lIT 817-472-0711 • 81111n&s, lIT aal·735-4418 • Casper, WY 811-235-0515
Gilllltta, WY 118·188-7175 • Rapid City, SD 118·172·1225 • Collala Station, 1X 8I1-88G-221,
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Client Sample 10:
Denison Mines USA Corp
3rd Quarter Chloroform
C1 0081 012-008
TW4·24R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-dB
Rl -Analyte reporting limit.
OCl -Quality control limit.
Result
ND
0.1
ND
ND
ND
ND
111
119
119
104
Units
mg/l
mg/l
ugll
ugll
ugll
ugll
%REC
%REC
%REC
%REC
Qualifiers RL
1
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/17/10
Collection Date: 08/23/10 08:55
DateRecelved: 08/27/10
Matrix: Aqueous
MCU
QCL Method Analysis Date I By
A4500-CI B 09/07/10 15:52/1r
E353.2 09/06/10 16:34/1jl
SW8260B 09/02110 04:08 I jlr
SW8260B 09/02110 04:08 I jlr
SWB260B 09/02110 04:08 I jlr
SW8260B 09/02110 04:081 jlr
SWB260B 09/02110 04:08 I jlr
SWB260B 09/02110 04:08 I jlr
SW8260B 09/02110 04:081 jlr
SW8260B 09/02110 04:081 jlr
Mel -Maximum contaminant level.
ND -Not detected at the reporting limit.
Page 10 of 17
EN:RGY
~"'r:iOdflt.rC '.ll f S
www.energyllb.com ..,..,....,S/tD,. Helena, lIT 177-471-8711 • Bllllnls, lIT .1· 731-44" • Cupet, WY ..... n5-151'
GilleItI, WY 88 ...... ·7175 • Rapid CHy, SD 118 .. 112 .. 122. • CoIllle Station, TX ........ 2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 10080518-006
Client Sample 10: TW4·25
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLAnLE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Deflnltlons:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
250
14
NO
NO
NO
NO
105
112
106
87.0
o -Rl increased due to sample matrix.
Units
mgll
mgll
ugll
ugll
ugll
ugiL
%REC
%REC
%REC
%REC
Report Date: 09/03/10
Collection Date: 0811 0/1 0 06:07
DateRecelved: 08/13/10
Matrix: Aqueous
Meu
Qualifier. RL QCL Method Analysis Date I By
A450o-CI B 0B/24110 11 :04/1r
0 E353.2 0B/26/10 13:09 Iljl
1.0 SW8260B 08118110 16:321 jlr
1.0 SW8260B 0811811016:321 jlr
1.0 SW8260B 08118/10 16:32/]lr
1.0 SW8260B 08118(10 16:321 jlr
80-120 SW8260B 08118110 16:32/1'r
70-130 SW8260B 0B/18110 16:32 1 llr
80-120 SW8260B 08/18/10 16:32/jlr
80-120 SW8260B 08118/1016:321 jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 9 of 52
EN:RGY
.-\fl.-;~U\I OlIlJ ~.
Helena, MT 111-412-41111 • 81111nls, MT 881·131 ....... Casper, WY 111-23$-1515
.GUIIItt, WYIIJ.Ig.71J5 . Rapid CIIy,SD 111·112·1225 · CoIle,eSlItlon, TX ...... D-2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-016
Client Sample 10: 1W4-25R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrale+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1 ,2-0ichlorobenzene-d4
Surr: Dibromofluoromethane
SUIT: p-Bromofluorobenzene
Surr: Toluene-dB
Report
Definitions:
RL -Analyte reporting limit.
OCl -Quality control limit.
Relult
NO
NO
NO
NO
NO
NO
102
103
107
88.0
Units
mglL
mglL
uglL
uglL
uglL
uglL
%REC
%REC
%REC
%REC
Qualifier. Rl
0.1
1.0
1.0
1.0
1.0
BO-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 08/09/10 14:11
DateRecelved: 08/13/10
Matrix: Aqueous
MeLJ
QCl Method Analysis Date/ By
A4500-CI B OB/24/10 11 :34 Ilr
E353.2 OB/26/10 13:46 Iljl
SW8260B OB/19/1 0 02:35 I jlr
SW8260B 08/19/10 02:35 I jlr
SW8260B OB/19/10 02:35/ jlr
SWB260B 08/19/1002:351 jlr
SWB260B 08/19/10 02:351 jlr
SWB260B 08/19/1002:35/ jlr
SW8260B 08/19/10 02:35 I jlr
SW8260B 08/19/10 02:351 jlr
Mel -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 19 of 52
EN:RGY
"'HOII .. ,fCd III "
Helena, MT 117-412-8711 • Bllllnls, MT III· 731-4411 • Casper, WY .11-23,"1115
Gillette, Wl8 ....... ·mS • Rapid City, SD 8 ..... 12-1225 • College Stltion, TX 811-111to221.
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-022
Client SamplelD: TW4-26
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nilrite as N
VOLAnLE ORGANIC COMPOUNDS
Carbon letrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromelhane
Surr: p-Bromofluorobenzene
Surr: Toluene-dB
Pleport
DefInitions:
Rl -Analyte reporting limit.
OCl -Qualily conlrollimit.
Result
17
9
NO
5.2
NO
NO
113
101
118
96.0
o -Rl Increased due 10 sample matrix.
Units
mg/l
mg/l
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Report Date: 09/03/10
Collection Date: 08/11/1007:04
DateRecelved: 08/13/10
Matrix: Aqueous
MCU
Qualifiers Rl QCl Method Analysis Date 1 By
1 A4500-CI B 08/24/10 11 :54/1r
0 1 E353.2 08/26/10 14:19/1jl
1.0 SW8260B 08/20/10 lB:051 jlr
1.0 SW8260B 08/20/10 1 B:051 jlr
1.0 SW8260B 08/20/10 18:05 1 jlr
1.0 SW8260B 08/20/10 1 B:051 jlr
80-120 SW8260B 08/20/10 18:051 jlr
70-130 SW8260B 08/20/10 1 B:05 1 jlr
BO-120 SW8260B OB/20/10 18:05 1 jlr
80-120 SW8260B 08/20/10 1B:051 jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 25 of 52
EN:RGY
.... ,i -.f/br r rl" £,
Helena, IT 111--'12-8111 • BlIllnls, MT 111-131-441. • Clsper, WY 811-231-1511
Gillette. ¥If nl-lll-7111 • Rapid City, sa 111-112-1225 • CO/lqa Station, IX ......... 2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C10080518-031
Client SamplelD: TW4-26R
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLAnLE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Deflnhlona:
Rl -Analyte reporting limit.
OCl -Quality conlrollimil.
Result
NO
NO
NO
NO
NO
NO
112
96.0
122
94.0
Un"_
mg/l
mgll
ugll
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
S -Spike recovery outside of advisory limits.
Report Date: 09/03/10
Collection Date: 08/1011 0 14:14
Dat.Recelved: 08/13/10
Matrix: Aqueous
MCU
Quallfle,. RL QCL Method Analysis Date I By
A4500-CI B 08/24/10 12:2811r
0.1 E353.2 08/26/10 14:46 I Ijl
1.0 SW8260B 08/20/10 16:55 1 jlr
1.0 SW8260B 08/20/1016:551 jlr
1.0 SW8260B 08/20/1016:551 jlr
1.0 SW8260B 08/20/1016:551 jlr
80-120 SW8260B 08/20/10 16:551 jlr
70-130 SW8260B 08/20/10 16:55 1 jlr
S 80-120 SW8260B 08/20/10 16:551 jlr
80-120 SW8260B 08/20/1016:551 jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 34 of 52
Er\ERGY
.\hC)it'IC P I ~
~., www.energylab.com
~~smulftZ
Helena, MT 877-472·D711 • Billings, MT 801·735·4419 • Casper, WY 188·235·0515
Gilletta, WY 11&-&8&·7175 • Rapid City, SD 888·112·1225 • College Station, TX 888·690·2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform
C1 0080785-01 0
Client Sample 10: TW4-60
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: l,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
NO
NO
NO
NO
NO
NO
102
118
110
96.0
Units
mg/l
mg/l
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Qualifiers Rl
1
0.1
1.0
1.0
1.0
1.0
SO-120
70-130
80-120
SO-120
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/17/10 14:30
DateReceived: 08/20/10
Matrix: Aqueous
MCL!
QCl Method Analysis Date 1 By
A4500-CI B 08/31/10 14:32/1jl
E353.2 09/02110 14:30/ Ijl
SWS260B OS/27/10 22:14/ jlr
SWS260B OS/27/10 22:14/ jlr
SW8260B 08/27/10 22:14/jlr
SWS260B OS/27/10 22: 14 / jlr
SWS260B 08/27/1022:14/ jlr
SW8260B 08/27/1022:14/ jlr
SW8260B 08/27/10 22:14/ jlr
SW8260B 08/27/10 22:14/ jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 12 of 25
EI\ERGY
AH(.fv\r"-llllf S E Helena, lIT ,71·472-1111 • 81111nll, MT ... ·131·44 .. • Casper, WY .... us-.m
/lIIlett8, WY n ..... ·7115 • Rapid City, SO .... 172·1225 • College Station, TX 111-8110221'
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 10080518-029
Client Sample 10: 1W4-65
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLAnLE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: l,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-dS
Rl -Analyte reporting limit.
OCl -Quality control limit.
Result
269
15
12
650
NO
NO
103
104
110
96.0
o -RL increased due 10 sample matrix.
Units
mgll
mgll
ugll
ugll
ugll
ugll
%REC
%REC
%REC
%REC
Report Date: 09/03/10
Collection Date: 08/12/10 07:30
DateRecelved: 08/13/10
Matrix: Aqueous
MCU
Quallflera RL QCL Method Analyall Date I By
A4500-CI B OS/31110 12:21/1jl
0 E353.2 OS/26/10 14:41 /ljl
1.0 SWS260B 08/26/102O:06 /1Ir
0 100 SWS260B OS/26/10 16:36/11r
1.0 SWS260B 08126110 20:06 1 jlr
1.0 SWS260B 08126110 20:06 I jlr
60-120 SWS260B 08126/10 20:06 I jlr
70-130 SWS260B 08126/10 20:06 I llr
So-120 SWS260B 08126110 20:06 1 jlr
SO-120 SWS260B 08/26/10 20:06 /11r
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 32 of 52
EN:RGY
• }\I }~JI ,/d{--,IJ' ._
www.energytab.com
AM/ftIaI~.fIIrcIlftZ
Helena, MT 811-472-0711 • Billings, MT 8OD-735-4419 • Casper, WY 888-235-0515
Gillatte, WY 818-&8&·1175 • Rapid City, SD 8BB-&12-1225 • College Station, 1X BB8-&9D-2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
LabID:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-011
Client Sample ID: TW4-70
Analyses
MAJOR IONS
Chloride
Nitrogen, Nitrate+Nitrite as N
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analyte reporting limit.
QCL -Quality control limit.
Result
26
NO
NO
NO
NO
NO
104
115
107
96.0
Units
mg/L
mg/L
ug/L
ug/l
ug/L
ug/L
%REC
%REC
%REC
%REC
Qualifiers Rl
,
0.1
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/16/10 13:40
DateReceived: 08/20/1 0
Matrix: Aqueous
MCll
QCl Method Analysis Date 1 By
A4500-CI B 08/31/10 14:33/1il
E353.2 09/02110 14:331 Iii
SW8260B 08/27/10 22:491 ilr
SW8260B 08/27/10 22:491 jlr
SW8260B 08/27/10 22:49/ ilr
SW8260B 08/27/10 22:49/ ilr
SW8260B 08/27/1022:49/ ilr
SW8260B 08/27/1022:49/ ilr
SW8260B 08/27/1022:49/ ilr
SW8260B 08/27/10 22:49 / jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 13 of 25
EN:RGY
A H )1.;:\)C'lllti ~
Halella, MT 171-412-8711 • BllllnlS, MT 101·731-4411 -Casper, WY .11-235-0515
IlUletta, 'Iff 1II-IM·1175 -Rapid City, SD 111-112·1125 • CoIlqe SlatiM, TX 1 .... 1~2211
LABORATORY ANALYTICAL REPORT
Cnent:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 1 0080518-039
Client SamplelD: Temp Blank
Analyses
PHYSICAL PROPERTIES
Temperature
Report
Definitions:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result Units
2.0
Qualifiers RL
Report Date: 09/03/10
Collection Date: 08/12/10
DateRecelved: 08/13/10
Matrix: Aqueous
Meu
QCL Method Analysis Date 1 By
E170.1 08/13/10 08:40 1 kbh
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 42 of 52
EI\ERGY
.,1 ,UJ< '"\I C'!/II ~
www.energylab.com
AMJyfIaI~SiIu 'IU
Helena, MT 811-472·0711 • Billings, MT 801-735-4489 • Casper, WY 888·235-0515
Gillatta, WY 818-&86-7175 • Rapid City, SD 888-&72-1225 • College Station, TX 888·&9D·2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785-016
Client Sample 10: Temp Blank
Analyses Result Units
PHYSICAL PROPERTIES
Temperature
Report
Definitions:
Rl -Analyte reporting limit.
QCl -Quality control limit.
2.0
Qualifiers Rl
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/18/10
DateReceived: 08/20/1 0
Matrix: Aqueous
MCLI
QCl Method Analysis Date 1 By
E170.1 08/20/10 09:00/ kbh
MCl -Maximum contaminant level.
ND -Not detected at the reporting limit.
Page 18 of 25
EN:RGY
, ABOHAT Glllt:!..;
www.entrgylab.com
AM(JtkIIll:dMc.lk.,1SI
Helena, MT 117-472-8711 • Billlnls, MT sal-735-4411 • Casper, WY 811-23~1511
GlllaIte, WY 111-111·7175 • Rapid City, SD 111-'72-1225 • CoIleg8 Station, TX 811-111t-221,
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform
C1 0081 012-01 0
Client Sample 10: Temp Blank
Analyses
PHYSICAL PROPERTIES
Temperature
Report
Definitions:
Rl -Analyte reporting limit.
QCl • Quality control limit.
Result Units
4.0
Qualifiers Rl
Report Date: 09/17/10
Collection Date: 08/24/10 12:32
DateRecelved: 08/27/10
Matrix: Aqueous
MCW
QCl Method Analysis Date 1 By
E170.1 08/27/10 09:00 1 kbh
MCl • Maximum contaminant level.
NO • Not detected at the reporting limit.
Page 12 of 17
EI\ERGY
J"'H(~I~/\rr.f'lr <1
Halena, MY 117-472-«1711 • Bllllnl .. MY 101·735-4411 • Casper, WV 1.f-235-l5t5
Gillette, 'Iff 11"' ... ·7175 • Rapid City, SO 1'''112·1225 • Coliele Station, IX 1.1-I11J..2211
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform 2010
C 1 0080518-038
Client Sample 10: Trip Blank
Analyses
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definition.:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
NO
NO
NO
NO
112
115
118
99.0
Units
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Qualifiers RL
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/03/10
Collection Date: 08/12/10
DateRecelved: 08/13/10
Matrix: Aqueous
MCU
aCL Method Analysis Date 1 By
SW8260B 08/21/1001 :08 1 jfr
SW8260B 08/21110 01 :08 1 jfr
SW8260B 08121 /1001 :08 1 Jfr
SW8260B 08121 /10 01 :08 1 Jfr
SW8260B 08121 /10 01 :08 1 jfr
SW8260B 08121/10 01 :08 1 jlr
SW8260B 08121 /1001 :08 1 Jlr
SW8260B 0812111 0 01 :08 1 jlr
MCl -Maximum contaminant level.
NO -Not detected at the reporting limit.
Page 41 of 52
EN:RGY
'\1, .. .')1'1,] Cdl '.
www.energylab.com
bI/fIIa/ EiruIIwIa sma rm Helena, tIT 877-412·0111 • Billings, tIT BOI·135·4489 • Casper, WY B88·235·0515
Gillette, WY 81&-IB8·1175 • Rapid City, SD 888·&72·1225 • College Station, 1X 888-6BO·2218
LABORATORY ANALYTICAL REPORT
Client:
Project:
Lab 10:
Denison Mines USA Corp
3rd Quarter Chloroform
C10080785·012
Client Sample 10: Trip Blank
Analyses
VOLATILE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: 1,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analyte reporting limit.
QCl -Quality control limit.
Result
NO
NO
NO
NO
102
116
108
95.0
Units
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Qualifiers Rl
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Revised Date: 10/22/10
Report Date: 09/08/10
Collection Date: 08/18/10 08:37
DateReceived: 08/20/1 0
Matrix: Aqueous
MCll
QCl Method Analysis Date 1 By
SW8260B 08/27/10 23:241 jlr
SW8260B 08/27/1023:241 jlr
SW8260B 08/27/10 23:241 jlr
SW8260B 08/27/1023:241 jlr
SW8260B 08/27/10 23:241 jlr
SW8260B 08/27/10 23:241 jlr
SW8260B 08/27/10 23:241 jlr
SW8260B 08/27/10 23:241 jlr
MCl -Maximum contaminant level.
ND -Not detected at the reporting limit.
Page 14 of 25
EI\ERGY
_/\A,"J : I,IO:?' S
www.energylab.com
MIITtIoI EAaJIIa 8raI 1151
Helena, MT 811-472-0111 • Billings, MT BGI-135-4481 • Casper, W'i 888·235-8515
Gillette, WY .11-111-7115 • Rapid City, SD 888-112·1225 • Collage Station, 1X 818-&11-221.
LABORATORY ANAL VTICAL REPORT
Client:
Project:
Denison Mines USA Corp
3rd Quarter Chloroform
Lab 10: C 10081 0 12-009
Client Sample ID: Trip Blank
Analyses
VOLAnLE ORGANIC COMPOUNDS
Carbon tetrachloride
Chloroform
Chloromethane
Methylene chloride
Surr: l,2-0ichlorobenzene-d4
Surr: Oibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Report
Definitions:
Rl -Analyle reporting limit.
QCl -Quality control limit.
Resutt
NO
NO
NO
NO
108
119
116
106
Unils
ug/l
ug/l
ug/l
ug/l
%REC
%REC
%REC
%REC
Qualifiers RL
1.0
1.0
1.0
1.0
80-120
70-130
80-120
80-120
Report Date: 09/17/10
Collection Date: 08/24/10
DateRecelved: 08/27/10
Matrix: Aqueous
MCU
QCL Method Analysts Dale 1 By
SW8260B 09/02110 04:441 ilr
SW8260B 09/02110 04:44 1 ilr
SW8260B 09/02110 04:441 ilr
SW8260B 09/02/10 04:441 jlr
SW8260B 09/02110 04:44 1 ilr
SW8260B 09/02110 04:441 jlr
SW8260B 09/02/10 04:44 1 jlr
SW8260B 09/02110 04:441 jlr
MCl -Maximum contaminant level.
NO -Nol detected at the reporting limit.
Page 11 of 17
EN:RGY
"'" .} t. ~." . ~ 1...1 II '->
September 03,2010
Denison Mines USA Corp
6425 S Hwy 191
Blanding, UT 84511
Workorder No.: Cl0080518
Helena, MT 177-412-11711 • BillinlS, MT .... 731·44" • Caspar, WY 111-235-1115
G111e111, WY 111-.11· 7175 • Rapid City, SO 111-112·1225 • CoII"e Station, 1X ......... 221.
ANALYTICAL SUMMARY REPORT
Quote ID: C2975· Chloroform Sampling
Project Name: 3rd Quarter Chloroform 2010
Energy Laboratories, Inc. received the following 39 samples for Denison Mines USA Corp on 8/13/2010 for analysis.
Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test
Cl0080518-001 lW4·3 08/10/10 06:27 08/13/10 Aqueous Chloride
Nitrogen, Nitrate + Nitrite
SW8260B VOCs, Standard list
C 10080518-002 lW4·12 08/10/10 07:46 08/13/10 Aqueous Same As Above
Cl0080518-003 lW4-13 08/10/10 07:56 08/13/10 Aqueous Same As Above
C 1008051 8-004 lW4-14 08/10/10 08:06 08/13/10 Aqueous Same As Above
C 1008051 8-005 lW4-23 08/10/10 06:40 08/13/10 Aqueous Same As Above
C 10080518-006 lW4-25 08/10/10 06:07 08/13/10 Aqueous Same As Above
Cl0080518-007 lW4-8 08/11/10 06:48 08/13/10 Aqueous Same As Above
C 10080518-008 lW4-9 08/11/10 06 :32 08/13/10 Aqueous Same As Above
Cl0080518-009 lW4-24 08/11/10 06:04 08/13/10 Aqueous Same As Above
Cl0080518-010 lW4-16 08/11/1007:21 08/13/10 Aqueous Same As Above
Cl0080518-011 lW4-3R 08/09/10 08:41 08/13/10 Aqueous Same As Above
Cl0080518-012 TW4-12R 08/09/10 09:28 08/13/10 Aqueous Same As Above
C10080518-013 TW4-13R 08/09/10 10:26 08/13/10 Aqueous Same As Above
C10080518-014 TW4-14R 08/09/10 12:26 08/13/10 Aqueous Same As Above
C10080518-015 TW4-23R 08/09/10 13:06 08/13/10 Aqueous Same As Above
C10080518-016 TW4-25R 08/09/10 14:11 08/13/10 Aqueous Same As Above
C10080518-017 TW4-8R OS/l 0/1 0 OS:40 08/13/10 Aqueous Same As Above
Cl0080518-018 TW4·9R OS/l 0/1 0 09:27 08/13/10 Aqueous Same As Above
Cl0080518-019 TW4-24R 08/10/10 10:18 08/13/10 Aqueous Same As Above
C 10080518-020 1W4·16R OS/l 0/1 0 11 :00 08/13/10 Aqueous Same As Above
Cl0080518-021 TW4-5 08/1111 0 08:17 08/13/10 Aqueous Same As Above
Cl0080518-022 1W4-26 OS/ll /1 0 07:04 08/13/10 Aqueous Same As Above
Cl0080518-023 TW4-18 08/12/1007:20 08/13110 Aqueous Same As Above
C 10080518-024 1W4-21 08/12/10 07:30 08/13/10 Aqueous Same As Above
C 10080518-025 1W4-10 08/12/1007:570S/13/10 Aqueous Same As Above
C10080518-026 TW4-22 OS/12/10 07:48 08/13/10 Aqueous Same As Above
C 10080518-027 1W4-6 OS/12/10 OS:07 08/13/10 Aqueous Same As Above
Page 1 of 52
EN:RGY
, ,',' I • ~'C'< . .
C10080518-028
C10080518-029
C 10080518-030
C10080518-031
C 10080518-032
C10080518-033
C 10080518-034
C 1 0080518-035
C 10080518-036
C10080518-037
C 10080518-038
C 1 0080518-039
www.energylab.com
.."..£-..... .. ,IU
Halena, lIT 177-472-0711 • BllllnlS, lIT 8G1-735-4411 • Caspar, WYI81-235-1515
Gil/etta, WY 1t1-11I-7175 • Rapid City, SO 118-172-1225 • Colle,. Station, IX 8 .... 11-2211
ANAL YTleAl SUMMARY REPORT
TW4-11 08/12/1 0 08: 18 08/13/1 0 Aqueous Same As Above
TW4-65 08/12/10 07:30 08/13/10 Aqueous Same As Above
TW4-5R 08/10/10 12:50 08/13/10 Aqueous Same As Above
TW4-26R 08/10/10 14:14 08/13/10 Aqueous Same As Above
TW4-18R 08/11/10 07:53 08/13/10 Aqueous Same As Above
TW4-21 R 08/11/10 08:43 08/13/10 Aqueous Same As Above
TW4-10R 08/11/10 09:30 08/13/10 Aqueous Same As Above
TW4-22R 08/11110 10:14 08/13/10 Aqueous Same As Above
TW4-6R 08/11/10 10:56 08/13/10 Aqueous Same As Above
TW4-11R 08/11/1012:51 08/13/10 Aqueous Same As Above
Trip Blank 08/12/1000:00 08/13/10 Aqueous SW8260B VOCs, Standard List
Temp Blank 08/12/10 00:00 08/13/10 Aqueous Temperature
This report was prepared by Energy Laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601. 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.
If you have any questions regarding these test results, please call.
Report Approved By: Digitally signed by
Stephanie Waldrop
Date: 2010.09.03 12:34:42 -06:00
Page 2 of 52
Halena, tIT 117-412-8711 • BllllnlS, tIT aGl-735-4411 • Casper, 'IN 8.I-US-8515
CLIENT: Denison Mines USA Corp
Project: 3rd Quarter Chloroform 2010 Report Date: 09/03/10
Sample Delivery Group: C10080518 CASE NARRATIVE
ORIGINAL SAMPLE SUBMITTAL(S)
All original sample submittals have been returned with the data package.
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 if there 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 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. 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, 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 of this Analytical Report relate only to the items submitted for analys;s.
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.
Page 30f52
•
EI\ERGY
.'1--.1",., __ '-1 "", ILOj
www.enet&Ylab.com
..",..~ .... IIJI
Halena, lIT 177-472-0711 • Billlnll, lIT sal· 731-441. • Casper, WY 118-235-1515
Glllltte, WY 811-111·7175 • Rapid City, SO 188·172·1225 • College Station, TX 818-11D-2211
QA/QC Summary Report
Client: Denison Mines USA Corp
Project: 3rd Quarter Chloroform 2010
Analyle
Method: A450O-CI B
Sample 10: MBLK9-100824C
Chloride
Sample 10: C1008051&OO8AMS
Chloride
Sample 10: C10080518-008AMSD
Chloride
Sample 10: LCS35-100824C
Chloride
Sample 10: C10080518-020AMS
Chloride
Sample 10: C10080518-020AMSD
Chloride
SamplelD: C10080518-028AMS
Chloride
Sample 10: C10080518-028AMSD
Chloride
SamplalD: C10080518-037AMS
Chloride
Sample 10: C10080518-037AMSD
Chloride
Method: A4SQO.CI B
Sample 10: MBLK9-100831A
Chloride
Sample 10: C10080518-029AMS
Chloride
Sample 10: C10080518-029AMSD
Chloride
Sample 10: LCS35-100831A
Chloride
auallflers:
RL -Analyt9 reporting limit.
Count Result Units
Method Blank
ND mg/L
Sample Matrix Spike
125 mg/L
Sample Matrix Spike Duplicate
127 mg/L
Laboratory Control Sample
3540 mg/L
Sample Matrix Spike
35.8 mg/L
Sample Matrix Spike Duplicate
36.1 mg/L
Sample Matrix Spike
222 mg/L
Sample Matrix Spike Duplicate
224 mg/L
Sample Matrix Spike
35.8 mg/L
Sample Matrix Spike Duplicate
36.1 mg/L
Method Blank
ND mg/L
Sample Matrix Spike
632 mg/L
Sample Matrix Spike Duplicate
632 mg/L
Laboratory Control Sample
3610 mg/L
Report Date: 09/03/10
Work Order: C10080518
RL O/OREC Low Limit High Limit RPD RPDLlmlt Qual
Batch: 100B24C-CL-TTR-W
Run: TITRATION_100824A 08/24/1009:25
0.5
Run: TITRATION_100824A 08/24/10 11 :14
1.0 96 90 110
Run: TITRATION_100824A 08/24/10 11 :16
1.0 98 90 110 1.4 10
Run: TITRATION_100824A 08/24/10 11 :21
1.0 100 90 110
Run: TITRATlON_I00824A 08/24/10 11 :45
1.0 101 90 110
Run: TlTRATION_100824A 08/24/10 11 :47
1.0 102 90 110 0.9 10
Run: TlTRATION_100824A 08/2411012:16
1.0 101 90 110
Run: TITRATION_I00824A 08/24/10 12:18
1.0 102 90 110 0.8 10
Run: TITRATION_100824A 08/24/10 12:41
1.0 101 90 110
Run: TITRATION_I00824A 08/24/1012:43
1.0 102 90 110 0.9 10
Batch: 100831A-CL-TTR-W
Run: TITRATION_1 00831 A 08/31/1010:57
0.5
Run: TlTRATION_1 00831 A 08/31/10 13:49
1.0 102 90 110
Run: TlTRATION_1 00831 A 08/31/1013:51
1.0 102 90 110 0 10
Run: TITRATION_1 00831 A 08/31/1014:22
1.0 102 90 110
ND -Not detected at the reporting limit.
Page 43 of 52
EI\ERGY
_;'\ ' ·1 '.~ T nr )J' '-,
Client: Denison Mines USA Corp
Helena, MT 871-472-0711 • Billinls, MT 88'-735-4411 • Casper, WY 111-235-1515
Gillette, WY 811-'11-7171 • Rapid City, SD 111-172-1225 • College Station, TX 111-&1"'2211
QA/Qe Summary Report
Report Date: 09/03/10
Project: 3rd Quarter Chloroform 2010 Work Order: C10080518
Analyte Count Result Units RL %REC Low Limit High Limit RPO RPDLlmlt Qual
Method: E353.2 Batch: R136521
Sample 10: MBLK-1 Method Blank Run: TECHNICON_l00826B 08/26/1012:34
Nitrogen, Nitrate+Nitrite as N NO mgfL 0.04
Sample 10: LCS-2 Laboratory Control Sample Run: TECHNICON_l00826B 08/26/1 0 12 :36
Nitrogen, Nitrate+Nitrite as N 2.39 mgfL 0.10 96 90 110
Sample 10: C10080518-011BMS Sample Matrix Spike Run: TECHNICON_100826B 08/26/1013:29
Nitrogen, Nitrate+Nitrite as N 2.06 mg/L 0.10 103 90 110
Sample 10: C10080518-011BMSO Sam pte Matrix Spike Duplicate Run: TECHNICON_100826B 08/26/1013:31
Nitrogen, Nitrate+Nitrite as N 2.13 mgfL 0.10 106 90 110 3.3 10
Sample 10: C10080518-020BMS Sample Matrix Spike Run: TECHNICON_l00826B 08/26/10 14: 11
Nitrogen, Nitrate+Nitrite as N 2.06 mg/L 0.10 101 90 110
Sample 10: C10080518-020BMSO Sample Matrix Spike Duplicate Run: TECHNICON_1 00826B 08/26/1014:14
Nitrogen, Nitrate+Nitrite as N 2.09 mg/L 0.10 102 90 110 1.4 10
Sample 10: C10080518-031BMS Sample Matrix Spike Run: TECHNICON_l008266 08/26/10 14:49
Nitrogen, Nitrate+Nitrite as N 2.08 mg/L 0.10 104 90 110
Sample 10: C10080518-031BMSO Sample Matrix Spike Duplicate Run: TECHNICON_1008266 08/26/1014:51
Nitrogen, Nitrate+Nitrite as N 2.11 mg/L 0.10 105 90 110 1.4 10
Qualifiers:
RL -Analyte reporting limit. NO -Not detected at the reporting limit.
Page 44 of 52
EN:RGY
• i\ , l,' 'r' 'I •
www.energylab.com
AM/JI/aI EnIIIIIa'-' 1m
Helena, tIT 177-412-8711 • Billinls, tIT BGI-13D-4411 • Casper, WY .. 1-235-G515
Gillette, WY ....... -717D • Rapid City, SD 1'B-I12-122D • College Station, TX .. I-SIII-221I
QA/QC Summary Report
Client: Denison Mines USA Corp Report Date: 09/03/10
Project: 3rd Quarter Chloroform 2010 Work Order: C10080518
Analyte Count Result Units RL O/OREC Low Limit High Limit RPO RPDLlmit Qual
Method: SW8260B Batch: R136231
Sample 10: 18-Aug-10_LCS_5 8 Laboratory Control Sample Run: 5975VOC1_100818A 08/18/1011 :49
Carbon tetrachloride 11 ug/L 1.0 108 70 130
Chloroform 11 uglL 1.0 107 70 130
Chloromethane 10 uglL 1.0 100 70 130
Methylene chloride 10 uglL 1.0 101 70 130
Surr: 1,2-0ichlorobenzene-d4 1.0 90 80 120
Surr: Oibromofluoromethane 1.0 87 70 130
Surr: p-Bromofluorobenzene 1.0 101 80 130
Surr: Toluene-d8 1.0 93 80 120
Sample 10: 18-Aug-10_MBLK3 8 Method Blank Run: 5975VOC1_100818A 08/18/10 12:59
Carbon tetrachloride NO uglL 1.0
Chloroform NO ug/L 1.0
Chloromethane NO uglL 1.0
Methylene chloride NO uglL 1.0
Surr: 1,2-0ichlorobenzene-d4 1.0 102 80 120
Surr: Oibromofluoromethane 1.0 92 70 130
Surr: p-Bromofluorobenzene 1.0 105 80 120
Surr: Toluene-d8 1.0 86 80 120
Sample 10: C10080518-019CMS 8 Sample Matrix Spike Run: 5975VOC1 -100818A 08/18/1018:53
Carbon tetrachloride 120 uglL 10 124 70 130
Chloroform 120 uglL 10 121 70 130
Chloromethane 110 uglL 10 113 70 130
Methylene chloride 120 uglL 10 117 70 130
Surr: 1,2-0ichlorobenzene-d4 1.0 87 80 120
Surr: Oibromofluoromethane 1.0 98 70 130
Surr: p-Bromofluorobenzene 1.0 101 80 120
Surr: Toluene-d8 1.0 95 80 120
Sample 10: C10080518-019CMSO 8 Sample Matrix Spike Duplicate Run: 5975VOC1_100818A 08/18/10 19:29
Carbon tetrachloride 120 uglL 10 123 70 130 20
Chloroform 120 uglL 10 120 70 130 1 20
Chloromethane 120 ugIL 10 116 70 130 2.5 20
Methylene chloride 110 uglL 10 115 70 130 2.1 20
Surr: 1,2-0ichlorobenzene-d4 1.0 87 80 120 0 10
Surr: Oibromofluoromethane 1.0 96 70 130 0 10
Surr: p-Bromofluorobenzene 1.0 101 80 120 0 10
Surr: Toluene-d8 1.0 94 80 120 0 10
Qualifiers:
RL -Analyte reporting limit. NO -Not detected at the reporting limit.
Page 45 of 52
EI\ERGY
J\;'l"U.,\p"")1I1t '..:
www.enerll.lab.com
".,..,~.aa lSI
Helena, fIT 117-472-0711 • BiIIlnl!, fIT IGI-735-441. • Cuper, WY 111-235-1515
Gillette, WY .. 5-... -7175 • Rapid City, SD 181-172-1225 • CoIlq8 SIJtion, IX 1.1-611).221.
QA/QC Summary Report
Client: Denison Mines USA Corp Report Date: 09/03/10
Project: 3rd Quarter Chloroform 2010 Work Order: C10080518
An.lyle Count Result Units RL %REC Low Limit High Limit RPO RPOLlmlt Qual
Method: SW8260B Batch: R136412
Sample 10: 2O-Aug-10_MBLK_6 B Method Blank Run: 5975VOC1_l00B20C 08/20/1013:16
Carbon tetrachloride NO ug/L 1.0
Chloroform NO ug/L 1.0
Chloromethane NO ug/L 1.0
Methylene chloride NO ug/L 1.0
Surr: 1,2-Dichlorobenzene-d4 1.0 110 80 120
Surr: Dibromolluoromethane 1.0 92 70 130
Surr: p-Bromofluorobenzene 1.0 120 80 120
Surr: Toluene-d8 1.0 95 80 120
Sample 10: 2O-AUG-l0_LCS_9 B Laboratory Control Sample Run: 5975VOC1_100820C 08/20/10 15: 10
Carbon tetrachloride 11 ug/L 1.0 108 70 130
Chloroform 11 ug/L 1.0 106 70 130
Chloromethane 11 ug/L 1.0 108 70 130
Methylene chloride 10 ug/L 1.0 101 70 130
Surr: 1,2-Dichlorobenzene-d4 1.0 105 80 120
Surr: Dibromolluoromethane 1.0 96 70 130
Surr: p-Bromofluorobenzene 1.0 106 80 130
Surr: Toluene-dB 1.0 97 80 120
Sample 10: C10080518-029CMS 8 Sample Matrix Spike Run: 5975VOCI -100820C 08/20/10 21 :01
Carbon tetrachloride 12000 ug/L 1000 125 70 130
Chloroform 13000 ug/L 1000 125 70 130
Chloromethane 13000 ug/L 1000 128 70 130
Methylene chloride 15000 ug/L 1000 147 70 130 S
Surr: 1,2-Dichlorobenzene-d4 1.0 109 80 120
Surr: Oibromolluoromethane 1.0 113 70 130
Surr: p-Bromolluorobenzene 1.0 94 80 120
Surr: Toluene-dB 1.0 97 80 120
-Spike recovery is high for one analyte. This is a matrix related bias since the MS MSD pair both exhibit this same behavior yet have an acceptable RPD.
Sample 10: C1008051&-029CMSO 8 Sample Matrix Spike Duplicate Run: 5975VOCC100820C 08/20/10 21 :36
Carbon tetrachloride 12000 ug/L 1000 119 70 130 4.9 20
Chloroform 13000 ug/L 1000 126 70 130 0.3 20
Chloromethane 12000 ug/L 1000 120 70 130 5.8 20
Methylene chloride 14000 ug/L 1000 140 70 130 4.5 20 S
Surr: l,2-Dichlorobenzene-d4 1.0 106 80 120 0 10
Surr: Oibromolluoromethane 1.0 108 70 130 0 10
Surr: p-Bromolluorobenzene 1.0 100 80 120 0 10
Surr: Toluene-dS 1.0 96 80 120 0 10
-Spike recovery is high for one analyte. This Is a matrix related bias since the MS MSD pair both exhibit this same behavior yet have an acceptable RPD.
Sample 10: 26-Aug-10_LCS_3 8 Laboratory Control Sample Run: 5975V()Cl_'00820C 08/26/1012:43
Carbon tetrachloride 9.8 ug/L 1.0 98 70 130
Chloroform 10 ug/L 1.0 100 70 130
Chloromethane 10 ug/L 1.0 102 70 130
Methylene chloride 9.B ug/L 1.0 98 70 130
Qualifiers:
RL -Analyte reporting limit. NO -Not detected at the reporting limit.
S -Spike recovery outside of advisory limits.
Page 46 of 52
EI\ERGY
,\~~rH· \rc'~lt + '-,
www.enerotab.com
,.,..~.a.11IZ
Helena, MY 177-472-41711 • BlllinKs, MY BaI-735-441' • Cuper, WY .11-235-1515
GIIIBHa, WY .1a-1 .. -7175 • Rapid City, SO .18-172-1225 • College Station, 1X ..... 810-2211
QA/Qe Summary Report
Client: Denison Mines USA Corp
Project: 3rd Quarter Chloroform 2010
Analyle Count Result Units
Method: SW8260B
Sample 10: 26-Aug-10_LCS_3 8 Laboratory Control Sample
Surr: l,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Sample 10: 26-Aug-10_MBLK_6 8 Method Blank
Carbon tetrachloride ND ug/L
Chloroform ND ug/L
Chloromethane ND ug/L
Methylene chloride ND ug/L
Surr: l,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
Sample 10: C10080785-009CMS 8 Sample Matrix Spike
Carbon tetrachloride 14000 ug/L
Chloroform 29000 ug/L
Chloromethane 16000 ug/L
Methylene chloride 13000 ug/L
Surr: l,2-Dichlorobenzene-d4
Surr: Dibromofluoromethane
Surr: p-Bromofluorobenzene
Surr: Toluene-d8
RL
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1000
1000
1000
1000
1.0
1.0
1.0
1.0
Report Date: 09/03/10
Work Order: C 1 0080518
%REC Low Limit High Limit RPO RPOLlmlt Qual
Batch: R136412
Run: 5975VOC1_l00820C 08/26/10 12:43
97 80 120
90 70 130
86 80 130
83 80 120
Run: 5975VOCl loo820C 08/26/10 14:29 -
102 80 120
91 70 130
103 80 120
83 80 120
Run: 5975VOCl 100820C 08/26/10 20:42
140 70 130 S
141 70 130 S
156 70 130 S
125 70 130
101 80 120
108 70 130
93 80 120
94 80 120
-Spike recovery is high for several analytes. This is a matrix related bias since the MS MSD pair both exhibit this same behavior yet have an acceptable RPD.
Sample 10: C10080785-009CMSO 8 Sample Matrix Spike Duplicate Run: 5975VOC1 _l00820C 08/26/10 21 : 16
Carbon tetrachloride 14000 ug/L 1000 138 70 130 2 20 S
Chloroform 29000 ugiL 1000 136 70 130 1.9 20 S
Chloromethane 14000 ugiL 1000 142 70 130 9.4 20 S
Methylene chloride 13000 ugiL 1000 127 70 130 1.3 20
Surr: l,2-Dichlorobenzene-d4 1.0 101 80 120 0 10
Surr: Dibromofluoromethane 1.0 112 70 130 0 10
Surr: p-Bromofluorobenzene 1.0 93 80 120 0 10
Surr: Toluene-d8 1.0 97 80 120 0 10
-Spike recovery is high lor several analytes. This is a matrix related bias since the MS MSD pair both exhibit this same behavior y"t have an acceptable RPD.
Qualifiers:
AL -Analyte reporting limit. NO -Not detected at the reporting limit.
S • Spike recovery outside of advisory limits_
Page 47 of 52
EN:RGY
l J'd-lOn .. '\fCIIlI J
www.energylab.com
.,..E.IaIIIaelia,1It
Helllll, MY .77 .... 12 .. 711 • Billinp, MY .... 735-44n • CaspIII', WY .1 .. 231-1515
Glllatta. WY ...... 8-7175 • R.pid City, SD '18-172-1225 • College Station, 1X 81 ... 11-2211
Workorder Receipt Checklist
Denison Mines USA Corp
111111111111111
C10080518
Login completed by: Tabitha Edwards
Reviewed by: BL2000\kschroeder
Reviewed Date: 8/17/2010
Shipping container/cooler in good condition?
Custody seals intact on shipping container/cooler?
Custody seals intact on sample bottles?
Chain of custody present?
Chain of custody signed when relinquished and received?
Chain of custody 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?
Contact and Corrective Action Comments:
None
Yes 0"
Yes 0"
Yes D
Yes 0"
Yes 0"
Yes 0"
Yes 0"
Yes 0"
Yes 0"
Yes 0"
2°C On Ice
Yes 0"
Yes 0"
Date Received: 8/13/2010
Received by: ha
Carrier name: FedEx
N°D
No D
No D
No D
NoD
No D
No D
N°D
No D
No D
Not Present D
Not Present D
Not Present 0"
N°D
No D
No VOA vials submitted D
Not Applicable D
Page 48 of 52
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This serves as nalice of this possibility. All sub-contract data win be clearly notated on your analytical report.
Visit our web site at www,e!!8!llvlab.com for additional Information, downloadable fee schedule, forms, and links.
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VISit our web site at www.energylab.com for additional information, downloadable fee schedule, forms, and links.
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In certain circumstances, samples submitted to Energy Laboratories, Inc. may be subcontracted to other cBrtifiedlaboratories in order to complete the analysis requested.
This serves as notice of this possibllity_ All sutKontract 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_
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In certain circumstances, sanples submitted to Energy Laboratories, Inc_ may be subcontracted to other certifl8d laboratories in order to complete the analysis requested.
This serves as notice of this posslbUIty. All sub-contract data wiu be clearly notated on your analytical report.
Vasit our web site at www.energY!ab.com for additional information, downloadable fee schedule, forms, and links.
EN:RGY
I :"j 11.,.lf I-Ij ,
Helena, MT 877-472-0711 • Billings, MT BGI·735·4489 • Casper, WY 888-235·11515
Gillette, WY 818·188·7175 • Rapid City, SD 888·112·1225 • College Station, IX 888-180·2218
ANAL VTICAL SUMMARY REPORT
October 22, 201 0
Denison Mines USA Corp
6425 S Hwy 191
Blanding, UT 84511
Workorder No.: C10080785
Project Name: 3rd Quarter Chloroform
Quote 10: C2975· Chloroform Sampling
Energy Laboratories, Inc. received the following 16 samples for Denison Mines USA Corp on 8/20/2010 for analysis.
Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test
C10080785-001 TW4-17 08/16/10 13:40 08/20/10 Aqueous Chloride
Nitrogen, Nitrate + Nitrite
SW8260B VOCs, Standard List
C10080785-002 TW4-19 08/16/10 09:58 08/20/10 Aqueous Same As Above
C10080785-003 TW4-15 08/16/10 14:15 08/20/10 Aqueous Same As Above
C10080785-004 TW4-7 08/18/10 08:27 08/20/10 Aqueous Same As Above
C10080785-005 TW4-1 08/18/1008:3708/20/10 Aqueous Same As Above
C 10080785-006 TW4-4 08/16/10 10:52 08/20/10 Aqueous Same As Above
C 10080785-007 MW-4 08/16/10 10:33 08/20/10 Aqueous Same As Above
C 10080785-008 TW4-2 08/18/1 0 08: 17 08/20/1 0 Aqueous Same As Above
C10080785-009 TW4-20 08/16/10 12:22 08/20/10 Aqueous Same As Above
C1 0080785-01 0 TW4-60 08/17/10 14:30 08/20/10 Aqueous Same As Above
C10080785-011 TW4-70 08/16/10 13 :40 08/20/10 Aqueous Same As Above
C 10080785-012 Trip Blank 08/18/10 08:37 08/20/10 Aqueous SW8260B VOCs, Standard List
C10080785-013 TW4-7R 08/17/1008:36 08/20/10 Aqueous Chloride
Nitrogen, Nitrate + Nitrite
SW8260B VOCs, Standard List
C10080785-014 TW4-1R 08/17/1009:20 08/20/10 Aqueous Same As Above
C10080785-015 TW4-2R 08/17/1010:0308/20/10 Aqueous Same As Above
C10080785-016 Temp Blank 08/18/10 00:00 08/20/10 Aqueous Temperature
This report was prepared by Energy Laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601. 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.
If you have any questions regarding these test results, please call.
Report Approved By: ~~~ uJtJ.~
Reporting Supervisor
Digitally Signed by
Stephanie Waldrop
Date: 2010.10.2211:35:06 ·06:00
Page 1 of 25
EN:RGY f~\ ."\,1U(I/~I!.I.lr._ ~ IWVW.energylab.com
ADI1fJaI~i!Ju 1152
Helena, MY 877-472-0711 • Billings, MY 80D-735-4489 • Casper, WY 888-235-0515
Gillette WY 816-&86-7175 • Ra id C SD 888-&12-1225 • Colle 8 Station TX 888-690-2218
CLIENT: Denison Mines USA Corp
Project: 3rd Quarter Chloroform
Sample Delivery Group: C10080785
REVISED/SUPPLEMENTAL REPORT
Revised Date: 10/22/10
Report Date: 09/08/10
CASE NARRATIVE
The attached analytical report has been revised from a previously submitted report due to the request by Kathy Weinel on
October 14, 2010 to change the collection date on sample TW4-2 from 8/16/10 to 8/18/10.
ORIGINAL SAMPLE SUBMITTAL(S)
All original sample submittals have been returned with the data package.
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 if there 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.
SOIUSOLID 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 E871 017; California: 02118CA;
Oregon: WY200001; Utah: 3072350515; Virginia: 00057; Washington: C1903
ISO 17025 DISCLAIMER:
The results of this 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.
Page 2 of25
EN:RGY
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WWN.energytab.com
AnlytJulm~stnc' /152
Helena, NT 871-472-0711 • Billings, NT 80D-735-4489 • Caspar, W1888-235-0515
Gillette, WY 816-88&-7175 • Rapid City, SD 881-172-1225 • College StatiDO, IX 888-&90-221 a
QA/QC Summary Report Revised Date: 10/22110
Report Date: 09/08/10
Work Order: C10080785
Client: Denison Mines USA Corp
Project: 3rd Quarter Chloroform
Analyte Count Result Units
Method: A4500-CI B
Sample 10: MBLK9-100831A
Chloride
Sample 10: C10080785-008AMS
Chloride
Sample 10: C10080785-008AMSO
Chloride
Sample 10: LCS35-100831A
Chloride
Sample ID: C10080785-011AMS
Chloride
Sample 10: C10080785-011AMSO
Chloride
Qualifiers:
RL -Analyte reporting limit.
Method Blank
ND mg/L
Sample Matrix Spike
22B mg/L
Sample Matrix Spike Duplicate
226 mg/L
Laboratory Control Sample
3610 mg/L
Sample Matrix Spike
212 mg/L
Sample Matrix Spike Duplicate
207 mg/L
RL %REC Low limit High Limit RPO RPOLimlt Qual
Batch: 1 00B31 A-CL-TTR-W
Run: TITRATION_100B31A OB/31/10 10:57
0.5
Run: TITRATION_100B31A OB/31/10 14:19
1.0 104 90 110
Run: TITRATlON_100B31A OB/31/10 14:20
1.0 103 90 110 O.B 10
Run: TITRATION_100B31A OB/31/10 14:22
1.0 102 90 110
Run: TlTRATION_100B31A OB/31/10 14:45
1.0 105 90 110
Run: TITRATION_100B31A OB/31/10 14:47
1.0 102 90 110 2.5 10
ND -Not detected at the reporting limit.
Page 19 of 25
EN:RGY .-
. fd:1Vr ... \T('jdl '.....
www.energylab.com
AMIyticII ~ SIttu /1!1
Haiana, MT 877-472-0111 • Billings, MT IGI-735-4419 . Caspar, WY 888-235-0515
Gillette, WY 8&8-886-1175 • Rapid City, SD 888-112-1225 • College Station, TX 888-690-2218
QA/QC Summary Report Revised Date: 10/22/10
Report Date: 09/08/10
Work Order: C10080785
Client: Denison Mines USA Corp
Project: 3rd Quarter Chloroform
Analyte Count Result Units
Method: E353.2
Sample 10: MBLK-1 Method Blank
Nitrogen, Nitrate+Nitrite as N ND mg/L
Sample 10: LCS-2 Laboratory Control Sample
Nitrogen, Nitrate+Nitrite as N 2.42 mg/L
Sample 10: C10080785-003BMS Sample Matrix Spike
Nitrogen, Nitrate+Nitrite as N 2.57 mg/L
Sample 10: C10080785'{)03BMSO Sample Matrix Spike Duplicate
Nitrogen, Nitrate+Nitrite as N 2.58 mg/L
Sample 10: C10080785.{)15BMS Sample Matrix Spike
Nitrogen, Nitrate+Nitrite as N 2.07 mg/L
Sample 10: C10080785-015BMSO Sample Matrix Spike Duplicate
Nitrogen, Nitrate+Nitrite as N 2.04 mg/L
Qualifiers:
RL -Analyte reporting limit.
RL %REC Low LImit High LImit RPO RPOLlmlt Qual
Batch: R136823
Run: TECHNICON_l00902A 09/02/10 13:07
0.04
Run: TECHNICON_l 00902A 09/02/10 13:10
0.10 97 90 110
Run: TECHNICON_l00902A 09/02110 14:03
0.10 99 90 110
Run: TECHNICON_l 00902A 09/02/10 14:05
0.10 99 90 110 0.4 10
Run: TECHNICON_l00902A 09/0211014:43
0.10 103 90 110
Run: TECHNICON_l 00902A 09/02/10 14:45
0.10 102 90 110 1.5 10
ND -Not detected at the reporting limit.
Page 20 of 25
EN:RGY
I fd-hHI,'dLHI! "-
www.energylab.com
AM/ytIaI~SIIJa 1m
Halena, MT 877-472-0711 • Billings, MT IDI-U5-448! • Caspar, WV 888-235-1515
Gillette, W'18IB-B88-7175 • Rapid City, SD 888-172-1225 • College Station, TX 888-690-2218
QA/QC Summary Report Revised Date: 10/22110
Client: Denison Mines USA Corp Report Date: 09/08/10
Project: 3rd Quarter Chloroform Work Order: C10080785
Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLlmit Qual
Method: SW8260B Batch: R136612
Sample 10: 27-Aug-10_MBLK_6 8 Method Blank Run: GCMS2_100827A 08/27/1012:32
Carbon tetrachloride NO uglL 1.0
Chloroform NO ug/L 1.0
Chloromethane NO uglL 1.0
Methylene chloride NO ug/L 1.0
Surr: l,2-0ichlorobenzene-d4 1.0 101 80 120
Surr: Dibromofluoromethane 1.0 100 70 130
Surr: p-Bromofluorobenzene 1.0 109 80 120
Surr: Toluene-d8 1.0 90 80 120
Sample ID: 27-Aug-10_LCSJ 8 Laboratory Control Sample Run: GCMS2_100827A 08/27/10 13:07
Carbon tetrachloride 12 ug/L 1.0 117 70 130
Chloroform 12 uglL 1.0 122 70 130
Chloromethane 11 uglL 1.0 108 70 130
Methylene chloride 10 uglL 1.0 104 70 130
Surr: l,2-0ichlorobenzene-d4 1.0 98 80 120
Surr: Dibromofluoromethane 1.0 108 70 130
Surr: p-Bromofluorobenzene 1.0 93 80 130
Surr: Toluene-d8 1.0 99 80 120
Sample 10: C10080785-002CMS 8 Sample Matrix Spike Run: GCMS2_100827A 08/27/1015:12
Carbon tetrachloride 1100 uglL 100 110 70 130
Chloroform 2800 uglL 100 80 70 130
Chloromethane 990 ug/L 100 99 70 130
Methylene chloride 1300 ug/L 100 132 70 130 S
Surr: l,2-0ichlorobenzene-d4 1.0 99 80 120
Surr: Dibromofluoromethane 1.0 102 70 130
Surr: p-Bromofluorobenzene 1.0 96 80 120
Surr: Toluene-d8 1.0 82 80 120
Sample 10: C10080785-002CMSO 8 Sample Matrix Spike Duplicate Run: GCMS2_100827A 08/27/10 15:47
Carbon tetrachloride 1200 ug/L 100 121 70 130 9.7 20
Chloroform 3300 ug/L 100 131 70 130 17 20 S
Chloromethane 960 ug/L 100 96 70 130 3.3 20
Methylene chloride 1200 ug/L 100 120 70 130 9.8 20
Surr: l,2-Dichlorobenzene-d4 1.0 99 80 120 0 10
Surr: Dibromofluoromethane 1.0 98 70 130 0 10
Surr: p-Bromofluorobenzene 1.0 108 80 120 0 10
Surr: Toluene-d8 1.0 86 80 120 0 10
Qualifiers:
RL -Analyte reporting limit. NO -Not detected at the reporting limit.
S -Spike recovery outside of advisory limits.
Page 21 of 25
EN:RGY
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""'~SiIJu lID
Helena, MT 877-412-0111 • Billings, MT 801-735-4489 • Caspar, WY 888-235-0515
Gillette, WY 816-186-1115 • Rapid City, SD 888-112-1225 • College StatiDn, 1X 888-6ID-2218
QA/QC Summary Report Revised Date: 10/22/10
Client: Denison Mines USA Corp Report Date: 09/08/10
Project: 3rd Quarter Chloroform Work Order: C10080785
Analyte Count Result Units RL %REC Low limit High Limit RPO RPOLimlt Qual
Method: SW8260B Batch: R136662
Sample 10: 30-Aug-10_LCS_8 B Laboratory Control Sample Run: 5975VOC1_100B30A OB/30/10 14:30
Carbon tetrachloride 13 uglL 1.0 127 70 130
Chloroform 13 uglL 1.0 127 70 130
Chloromethane 14 uglL 1.0 136 70 130 S
Methylene chloride 13 ug/L 1.0 126 70 130
Surr: 1,2-Dichlorobenzene-d4 1.0 90 BO 120
Surr: Dibromofluoromethane 1.0 9B 70 130
Surr: p-Bromofluorobenzene 1.0 103 BO 130
Surr: Toluene-dB 1.0 95 BO 120
Sample 10: 30-Aug-10_MBLK_11 B Method Blank Run: 5975VOC1 -100B30A OB/30/10 16:16
Carbon tetrachloride ND uglL 1.0
Chloroform ND uglL 1.0
Chloromethane ND uglL 1.0
Methylene chloride ND uglL 1.0
Surr: 1,2-Dichlorobenzene-d4 1.0 104 BO 120
Surr: Dibromofluoromethane 1.0 96 70 130
Surr: p-Bromofluorobenzene 1.0 10B BO 120
Surr: Toluene-dB 1.0 B7 BO 120
Sample 10: C10080785-015CMS B Sample Matrix Spike Run: 5975VOC1 -100B30A OB/31/10 00 :40
Carbon tetrachloride 130 ug/L 10 134 70 130 S
Chloroform 130 uglL 10 129 70 130
Chloromethane 140 uglL 10 135 70 130 S
Methylene chloride 130 uglL 10 130 70 130
Surr: 1,2-Dichlorobenzene-d4 1.0 B9 BO 120
Surr: Dibromofluoromethane 1.0 105 70 130
Surr: p-Bromofluorobenzene 1.0 104 BO 120
Surr: Toluene-dB 1.0 94 BO 120
-Spike recovery is high for several analytes. This is a matrix related bias since the MS MSD pair both exhibit this same behavior yet have an acceptable RPD.
Sample 10: C10080785-015CMSO B Sample Matrix Spike Duplicate Run: 5975VOC1 _100B30A OB/31/10 01 :16
Carbon tetrachloride 140 ug/L 10 143 70 130 6.4 20 S
Chloroform 140 uglL 10 137 70 130 6.1 20 S
Chloromethane 140 uglL 10 144 70 130 6.3 20 S
Methylene chloride 140 ug/L 10 137 70 130 4.B 20 S
Surr: 1,2-Dichlorobenzene-d4 1.0 B9 BO 120 0 10
Surr: Dibromofluoromethane 1.0 105 70 130 0 10
Surr: p-Bromofluorobenzene 1.0 104 BO 120 0 10
Surr: Toluene-dB 1.0 93 BO 120 0 10
-Spike recovery is high for several analytes. This is a matrix related bias since the MS MSD pair both exhibit this same behavior yet have an acceptable RPD.
Qualifiers:
RL -Analyte reporting limit. ND -Not detected at the reporting limit.
S -Spike recovery outside of advisory limits.
Page 22 of 25
EN:RGY
,', \.) I .,. I • 'I ~ II '-,
~~ www.energylab.com
~ AMItfIaI~SIIu ,m
Halana, MT 877-472~0711 • Billings, MT 800-735-4489 • Caspar, WY 888-235-0515
Gillette, WY 111-186-7175 • Rapid City, SD 888-172-1225 • College Station, TX 888-610-2218
Workorder Receipt Checklist
Denison Mines USA Corp
IIIIIIIIIIII!IIIIIIIIIIIIIIII IIIIIIIIIII~IIIIIIII~
C10080785
Login completed by: Halley Ackerman
Reviewed by: BL2000\kschroeder
Reviewed Date: 8/24/2010
Shipping container/cooler in good condition?
Custody seals intact on shipping container/cooler?
Custody seals intact on sample bottles?
Chain of custody present?
Chain of custody signed when relinquished and received?
Chain of custody agrees with sample labels?
Samples in proper container/bottle?
Sample containers intact?
Sufficient sample volume for indicated test?
All samples received within holding time?
ContainerfTemp Blank temperature:
Water -VOA vials have zero headspace?
Water -pH acceptable upon receipt?
Contact and Corrective Action Comments:
Yes 0'
Yes 0'
Yes 0
Yes 0'
Yes 0'
Yes 0'
Yes 0'
Yes 0'
Yes 0'
Yes 0
2·C On Ice
Yes 0'
Yes 0'
Date Received: 8/20/2010
Received by: ckw
Carrier name: FedEx
No 0
No 0
No 0
No 0
No 0
NoD
No 0
No 0
No 0
No 0
Not Present 0
Not Present 0
Not Present 0
No 0
No 0
No VOA vials submitted 0
Not Applicable 0
Page 23 of 25
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Special Report/Formats:
D ow o POTWNVWTP D State: ___ _ o Other: ___ _
Chain of Custody and Analytical Request Record page_t of~
Origin
State: Yes~NoD
Email: Sampler: (Please Print)
Purchase Order:
o EDDfEDT(Electronic Data)
Format:. ___ _
D LEVEL IV o NELAC
Return to Client:
3: a ...
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RUSH sample submittal I v cr' I for charges and -~ ~. -_._ •.
scheduling -See
Instruction Page
Comments:
~
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On Ice:
Custody Seal
On BotIIe
On Coole(
Intact
DC
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In certain Circumstances, samples submitted to Energy Laboratories, Inc. may be subcontracted to other cenfied laboratories in order to complete the analysis requested.
This serves as notice of this possibility. All sub-contract data will be clearly n'ofated on your analytical report.
Visit our web site at www.energylab.com for additional information, downloadable fee schedule, forms, and links.
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D ~ V\. ~ ~ <.N-(\1\ , State: Yes 0 No 0
Report ~iI Addr~ Email: Sampler: (Please Print) .O,D"r .
Purchase Order: QuotelBottle Order:
Special ReportlFormats: ~ • Contact ELI prior to a ... RUSH sample submittal
'" 0 UJ ~ ~ for charges and . .~ ~;g ~ ~ 0 ~ R schedu~ing -See ,
O OW 0 EDD/EDT(E' ~CI)~ m ~ W --Instruction Page ~+-lectromc Data) 5~= <I) Q) :r:: -g ~ptT_p o POTWNVWTP Format: U «~~~I~ t) 5 U Comments: :::t... 0 o State: 0 LEVELIV ~ ~~ 5;§ ~ ~ C o Other: 0 NELAC ij~r:s . ~ :; Onlc;e; N t:CD'!:::CD3: ...... I-S i 0.«1 g'C W "E Custody Seal
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SAMPLE IDENTIRCATION SllInlltunl
Name, Location, Inlerval. etc. Mah:h Y
8
9
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Custody Received by Print): OalefT1me:
Record Recalved by (print): a rno; Signature:
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MUSTber--------------------4~~----~M=~~~~_,~~~~~~~~------
Signed at: Return to Client: L.ab Dis al: (9:
In certain circumstances. samples submitted to Energy Laboratories, inc. may be subcontracted to other certified beratories in order to complete the analysis requested.
This serves as notice of this possibility. All sub-contract data will be ciearly no on your analytical report.
Visit our web site at www.energylab.com for additional information, downloadable fee schedule, forms, and links.
EI\ERGY www.eneroiab.com Helena, MT 177-'72-1711 • BIII/nls, MT 80 .. 135-4411 -Casper, W'f ..... 23"515
'.'r·]O'~A I OR'11 os AaIfIIaI £aaIIiII:I .... 11U Glflttta, WY 1.&-111·71 75 • Rapid City, so 111-112·1225 • College Statton, IX ....... t-221.
ANALYTICAL SUMMARY REPORT
September 17, 2010
Denison Mines USA Corp
6425 S Hwy 191
Blanding, UT 84511
Workorder No.: C10081012
Project Name: 3rd Quarter Chloroform
Quote 10: C2975 -Chloroform Sampling
Energy laboratories, Inc. received the following 10 samples for Denison Mines USA Corp on 8/27/2010 for analysis.
SamplalD Client Sample 10 Collect Data Receive Date Matrix Test
C10081012-001 TW4-1 08/24/10 12:45 08/27/10 Aqueous Chloride
Nitrogen, Nitrate + Nitrite
SW8260B VOCs, Standard list
C10081012-002 TW4-16 08/24/1012:3208/27/10 Aqueous Same As Above
C10081012-003 TW4-22 08/24/1 0 12 :21 08/27/1 0 Aqueous Same As Above
C 10081 012-004 TW4-24 08/24/1 0 12: 1 0 08/27/1 0 Aqueous Same As Above
C10081012-005 TW4-1R 08/23/1 0 13 :35 08/27/1 0 Aqueous Same As Above
C1 0081 012-006 TW4-16R 08/23/1009:57 08/27/10 Aqueous Same As Above
C10081012-007 TW4-22R 08/23/1 0 12 :34 08/27/1 0 Aqueous Same As Above
C10081012-008 TW4-24R 08/23/10 08 :55 08/27/1 0 Aqueous Same As Above
C10081012-009 Trip Blank 08/24/1000:00 08/27/10 Aqueous SW8260B VOCs, Standard list
C10081012-010 Temp Blank 08/24/1012:3208/27/10 Aqueous Temperature
This report was prepared by Energy laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601. Any exceptions
or problems with the analyses are noted in the laboratory Analytical Report, the QA/QC Summary Report, or the
Case Narrative.
The results as reported relate only to the item(s) submitted for testing.
If you have any questions regarding these test results, please call.
Report Approved By: cSt;ptU\.t £) uJlLl~
Reporting Supervisor
Digitally signed by
Stephanie Waldrop
Date: 2010.09.17 17:48:27 -06:00
Page 1 of 17
Helena, MT817-472-0111 • Billings, MT 801-735-44" • Casper, WY 111-235-1515
Gillelta WY 818·118-1175 • Ra Id C so 188·872-1225 • Colle 8 Station TX BlI-6IIt-22t8
CLIENT: Denison Mines USA Corp
Project: 3rd Quarter Chloroform Report Date: 09/17/10
Sampl. Delivery Group: C10081012 CASE NARRATIVE
ORIGINAL SAMPLE SUBMITIAL(S)
All original sample submittals have been returned with the data package.
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 if there 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 TOS 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.
SOIUSOLID 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 wi" 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 of this 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
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web page www.energylab.com.
Page 2 of 17
EN:RGY
~ AHORAtOf"..J1i 'J
www.enerllYlab~m
AIII/JfJQI &uIIwIc. S*u 1m Helena, MT 177-472-8711 • Billings, MT 801·735·4411 • CasPllI, WY 881-235-1515
Gillette, WY 811-111· 7175 • Rapid City, SD 118·112·1225 • College Stallon, 1X 881-&10-2218
QA/QC Summary Report
Client: Denison Mines USA Corp
Project: 3rd Quarter Chloroform
Report Date: 09/17/10
Work Order: C10081012
Analyte
Method: A450O-CI B
Sample 10: MBLK9-100907
Chloride
Sample 10: C10081012-D08A
Chloride
Sample 10: C10081012-D08A
Chloride
SamplelO: LCS35-100907
Chloride
Qualifiers:
RL -Analyte reporting limit.
Count Result Units
Method Blank
ND mg/L
Sample Matrix Spike
38.2 mglL
Sample Matrix Spike Duplicate
37.5 mg/L
Laboratory Control Sample
3580 mglL
RL %REC Low Limit High Limit RPO RPDLlmit Qual
Batch: 100907-CL-TTR-W
Run: TITRATION_100907A 09/07/1015:25
0.5
Run: TITRATION_100907A 09/07/10 15:53
1.0 108 90 110
Run: TITRATlON_100907A 09/07/10 15:55
1.0 106 90 110 1.8 10
Run: TITRATlON_100907A 09/07/10 15:58
1.0 101 90 110
ND -Not detected at the reporting limit.
Page 13 of 17
EI\ERGY
L /\HQI-lAl or"~'J
www.energylab.com
lMIIfIaI~aw lID
Helena, MT 877-472-11711 • Billings. MT .'-135-4411 • Casper, WV •• 1-235-D511
Gillett!, WV a ...... -7171 • Rapid City, SD 881-172-1221 • Collap Station, TX 881-810-2218
QA/QC Summary Report
Client: Denison Mines USA Corp
Project: Srd Quarter Chloroform
Analyle Count Result Units
Method: E353.2
Sample 10: MBLK-1
Nitrogen, Nitrate+Nitrite as N
Sample 10: LCS-2
Nitrogen, Nitrate+Nitrite as N
Sample 10: C10081004-003EMS
Nitrogen, Nitrate+Nitrite as N
Sample 10: C10081004-003EMSO
Nitrogen, Nitrate+Nitrite as N
Qualifiers:
RL -Analyte reporting limit.
Method Blank
NO mg/L
Laboratory Control Sample
2.48 mg/L
Sample Matrix Spike
2.07 mglL
Sample Matrix Spike Duplicate
2.02 mg/L
Report Date: 09/17/1 0
Work Order: C10081012
RL %REC Low Limit High Limit
Run: TECHNICON_100906A
0.04
Run: TECHNICON_1 00906A
0.10 99 90 110
Run: TECHNICON_100906A
0.10 103 90 110
Run: TECHNICON_100906A
0.10 101 90 110
NO -Not detected at the reporting limit.
RPO RPDLimit Qual
2.4
Batch: R136887
09/06/1014:41
09/06/10 14:44
09/06/1016:16
09/06/10 16:19
10
Page 14 of 17
EN:RGY
/\~) ~ r ... , --,:JI =
www.enelgylab.com
AtII/tfIaI buIIIIIa.Slrcf IISI
Halana, lIlT 877-472-8711 • Billings, NT BGI-135-44811 • Casper, WY 888-235-0515
Gillette, YIY 81&-111-7175 • Rapid City, SD 188-172-1225 • Collage Station, 'IX 881-8111-221.
QA/QC Summary Report
Client: Denison Mines USA Corp Report Date: 09/17/10
Project: 3rd Quarter Chloroform Work Order: C10081012
Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLImit Qual
Method: SW8260B Batch: R136774
Sample 10: 01-Sep-10_LCS_3 8 Laboratory Control Sample Run: GCMS2_100901A 09/01/1011 :59
Carbon tetrachloride 12 ug/L 1.0 121 70 130
Chloroform 11 ug/L 1.0 112 70 130
Chloromethane 13 ug/L 1.0 128 70 130
Methylene chloride 12 ug/L 1.0 119 70 130
Surr: 1,2-Dichlorobenzene-d4 1.0 105 80 120
Surr: Dibromofluoromethane 1.0 107 70 130
Surr: p-Bromofluorobenzene 1.0 110 80 130
Surr: Toluene-d8 1.0 97 80 120
Sample 10: 01-Sep-10_MBLK_6 8 Method Blank Run: GCMS2_100901A 09/01/1013:43
Carbon tetrachloride NO ug/L 1.0
Chloroform NO ug/L 1.0
Chloromethane NO ug/L 1.0
Methylene chloride NO ug/L 1.0
Surr: 1,2-Dichlorobenzene-d4 1.0 106 80 120
Surr: Dibromofluoromethane 1.0 94 70 130
Surr: p-Bromofluorobenzene 1.0 131 80 120 S
Surr: Toluene-d8 1.0 91 80 120
Sample 10: C10081012-D03CMS 8 Sample Matrix Spike Run: GCMS2_1 00901 A 09/01/10 21 :30
Carbon tetrachloride 1300 ug/L 100 127 70 130
Chloroform 1600 ug/L 100 123 70 130
Chloromethane 1200 ug/L 100 124 70 130
Methylene chloride 1200 ug/L 100 120 70 130
Surr: 1 ,2-Dichlorobenzene-d4 1.0 104 80 120
Surr: Dibromofluoromethane 1.0 109 70 130
Surr: p-Bromofluorobenzene 1.0 97 80 120
Surr: Toluene-d8 1.0 111 80 120
SamplalO: C10081012-D03CMSO 8 Sample Matrix Spike Duplicate Run: GCMS2_100901A 09/01/1022:05
Carbon tetrachloride 1200 ug/L 100 122 70 130 4.2 20
Chloroform 1500 ug/L 100 114 70 130 6.3 20
Chloromethane 1200 ug/L 100 121 70 130 2 20
Methylene chloride 1100 ug/L 100 107 70 130 12 20
Surr: 1,2-Dichlorobenzene-d4 1.0 104 80 120 0 10
Surr: Dibromofluoromethane 1.0 100 70 130 0 10
Surr: p-Bromofluorobenzene 1.0 99 80 120 0 10
Surr: Toluene-d8 1.0 95 80 120 0 10
Qualifiers:
RL -Analyte reporting limit. NO -Not detected at the reporting limit.
S -Spike recovery outside of advisory limits.
Page 15 of 17
EN:RGY ."
t hDOl'Af OHIf ~
www.energylab.com
AM/ftIuJ EmINct SiIa tm Helen., MT 177-472-0711 • Billings, MT 8al-735 ..... 81 • Casper, WY 818-235-a515
Gillatta, WV 811-118-7175 • Rapid City, SD 811-172-1225 • College Station, TX 818-111-2211
Workorder Receipt Checklist
Denison Mines USA Corp
IIIIIIIIIIIIIIII~
C10081012
II
login completed by: Corinne Wagner
Reviewed by: Bl2000\kschroeder
Reviewed Date: 8/30/2010
Shipping container/cooler in good condition?
Custody seals intact on shipping container/cooler?
Custody seals intact on sample bottles?
Chain of custody present?
Chain of custody signed when relinquished and received?
Chain of custody 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?
Contlilct 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
4°C On Ice
Yes 0
Yes 0
Date Received: 8/27/2010
Received by: ckw
Carrier name: FedEx
No 0
No 0
No 0
No 0
No 0
NoD
No 0
No 0
No 0
No 0
Not Present 0
Not Present 0
Not Present 0
No 0
No 0
No VOA vials submitted 0
Not Applicable 0
Page 16 of 17
"'0 I»
CD ...... ....,
So .... ....,
...
r'Lr::A.,r:: t"~11'II1 (t'roVlae as mucn mTormallon as POSSIDle.)
Company Name: Project Name, PWS, Permit, Etc. Sample Origin EPA/State Compliance:
Den;sOl\ /J.lt\~ 3",l Q~rltr ChJo~rY} State: L4'f" Yes g'" No 0
Report Mail Address: fo 60)( ~ Contact Name: Phone/Fax: Email: Sampler: (Please Print)
BINJ'~ u. T 1'i~" R ~OJ\ PcJMC.I" Y35 G7'i lll\ ~ncr "o)l,"J,,-L.
Invoice Address: Invoice Contact & Phone: Purchase Order: Quote/BotUe Order: -
Sc...M~ bo",e.
Special Report/Formats: 3: &liWM1,W@~ OO~@([l~1ID .. Contad ELI prior to r~tX ° Qj RUSH sample submittal
"'0 0 ..1:: ~ for charges and Cooler ills): ~"'~0Ili; C R scheduling -See c;L'~+ Dow .->~ >-Cii ~ w !::. Instruction Page D EDD/EDT(E1ecIronic Data) ~cnUl ~3: J: 3::-0 C> r--'0 Receipt Teonp DpOTWIWWTP U c:: Comments: Format: u<c;g~~~ ~ ::J U t1 °c o State: o LEVEL IV c .. Qjmlc: ~ e
,-G)-a'::::: V co c:: o Other: DNELAC ~ c..C'IIr~o ~ (jN ~s· ~ On Ice:
::J CD·!:: &3: ~ 5 z-a.<ClepO W 'E Cu.tody Seal ~ Ii >1 W co ~-~ cn ~ CJ) "2 On Coole, N
~ ~ H Intact N
SAMPLE IDENTIFlCATION Collection Collection MATRIX " SignatU/'ll Ci) (Name, Location,lnterval, etc.) Date Time Match
1 'S-w )( -=L\\JY -I ~l~·\O ,,,q~ ~
2 TWLl-lb ~ .. 24 .. IO 'l.-;~ t..,-W X ~
3 'Tw4-~ 1-:1'4 ... 10 I~\ ~-W Y. ~ Onn
4 -rwLt _ '-l.\ S-lq-IO l~'O E,-W }C I 5.W'i_ lR i-2!--lb J33S 'f:,-W )C I~
6 Twq_ H,R 1-;2$-\0 0'\51 S-w .,. ~
7T~_~~ '-:1!-tO I~ '5-W .,. I~ (})Ctfil DI-;2.
8 TW4 -:l'"llS. 1-~10 O~~ ~-\J )C ~
9 "Trio Blo.n~ ~
.1~A:r,J' -t::::!
Cusfoay :-1:-by~J ~~ Datofrme: .:).. S~rL. Received by (print); Oale/Tune: Signatlire:
.o4'na-~"~n: ,-:u,~ll 1I"1l'l " LIWlDx ~. -.., Record Rei'nquIshad by (pniltt U O&WTlrna: SlgnIIIuf&: V ReQi/ved by (prlnl~ OalBIT1I11U.; SlQr\8IUJ&:
MUST be
Signed Keo.n/e<I D)' ~.101')': u~ '7,1v 70::::> "IgIIIIN,e;
SampioDisp(l8a/: Return to CRent: Lab Disposal:
In certain circumstances, samples submitted to Energy Laboratories, Inc. may be subcontracled to other certified laboratories in order to complete the analysis requested.
This serves as notice of this possibility. All sub-contract data wiD be clearly notated on your analytical report.
Visit our web site at www.energylab.com for additional information, downloadable fee schedule, forms, and links.
Tab I
Quality Assurance and Data Validation Tables
1-1: Field QA/QC Evaluation
2x Casing Volume 2x Casing Volume Volume
Location Volume Pumped Volume Pumped Cbeck Conductivity RPD pH RPD Temp RPD Redox Potential RPD Turbidity RPD
Continuously
MW-4 NA pumped well --1958 1920 1.96 6.69 6.69 0.00 15.23 15.21 0.13 336 338 0.59 0.0 0.0 0.00
TW4-1 61.16 131.00 61 131 OK 2153 2157 0.19 6.16 6.18 0.32 14.88 14.84 0.27 396 397 0.25 10.8 10 7.69
TW4-2 68.66 62.00 69 62 Insufficient 2756 2817 2.19 6.58 6.58 0.00 14.93 14.92 0.07 448 448 0.00 55.2 62.1 11.76
TW4-3 63.26 70.00 63 70 OK 1743 1732 0.63 6.53 6.55 0.31 14.5 14.51 0.07 427 428 0.23 8.5 8.3 2.38
Continuously
TW4-4 NA pumped well --2423 2423 0.00 6.4 6.39 0.16 14.96 14.94 0.13 266 268 0.75 8 8.2 2.47
TW4-5 85.14 90.00 85 90 OK 1739 1732 0.40 6.55 6.56 0.15 15.41 15.4 0.06 379 383 1.05 65.5 68.8 4.91
TW4-6 34.75 44.00 35 44 OK 3566 3500 1.87 6.62 6.7 1.20 15.78 15.52 1.66 432 428 0.93 138 99.6 32.32
TW4-7 68.72 64.00 69 64 Insufficient 1625 1691 3.98 6.8 6.8 0.00 14.76 14.75 0.07 292 295 1.02 43.7 42.5 2.78
TW4-8 75.82 100.00 76 100 OK 3259 3261 0.06 6.79 6.78 0.15 14.86 14.82 0.27 161 165 2.45 53.2 52.3 1.71
TW4-9 86.94 90.00 87 90 OK 2432 2466 1.39 6.41 6.41 0.00 14.89 14.84 0.34 370 371 0.27 51.2 56.5 9.84
TW4-1O 79.91 61.00 80 61 Insufficient 2553 2774 8.30 6.42 6.42 0.00 14.92 25.51 52.39 344 342 0.58 44.1 77.5 54.93
TW4-11 54.59 61.00 55 61 OK 1687 1674 0.77 6.65 6.64 0.15 14.57 14.56 0.07 386 389 0.77 9.3 10.1 8.25
TW4-12 82.19 90.00 82 90 OK 969.4 969.9 0.05 6.82 6.83 0.15 14.65 14.66 0.07 424 424 0.00 8.8 8.9 1.13
TW4-13 72.33 78.00 72 78 OK 1512 1528 1.05 6.85 6.86 0.15 14.9 14.89 0.07 425 427 0.47 37.8 46.4 20.43
TW4-14 5.84 3.50 6 4 Insufficient 4449 -6.67 -" .. 30.25 --365 -235 -
Continuously
TW4-15 NA pumped well --3519 3535 0.45 6.38 6.39 0.16 15.19 15.19 0.00 196 205 4.49 1.3 1.3 0.00
TW4-16 102.08 140.00 102 140 OK 3451 3546 2.72 6.46 6.47 0.15 14.86 14.85 0.07 399 400 0.25 199.5 204.8 2.62
TW4-17 69.74 70.52 70 71 OK 3976 3974 0.05 6.25 6.25 0.00 14.81 14.81 0.00 149 148 0.67 13.8 13 .2 4.44
TW4-18 106.49 110.00 106 110 OK 1579 1563 1.02 6.3 6.29 0.16 15.19 15.18 0.07 479 479 0.00 224 220.3 1.67
Continuously
TW4-19 NA pumped well --2931 2926 0.17 6.46 6.5 0.62 17.88 17.89 0.06 381 376 1.32 25.7 22.5 13.28
Continuously
TW4-20 NA pumped well --3476 3534 1.65 5.97 6.02 0.83 18.9 18.79 0.58 190 210 10.00 33.9 31.4 7.66
TW4-21 88.33 100.00 88 100 OK 3061 3064 0.10 6.7 6.71 0.15 16.01 16.01 0.00 449 449 0.00 7.5 7.2 4.08
TW4-22 77.16 170.00 77 170 OK 3142 3142 0.00 6.54 6.54 0.00 15.94 15.95 0.06 448 447 0.22 968 914 5.74
TW4-23 62.62 240.00 63 240 OK 3675 3682 0.19 6.26 6.26 0.00 14.42 14.44 0.14 106 106 0.00 9.1 8.3 9.20
TW4-24 73.98 110.00 74 110 OK 9014 9053 0.43 6.39 6.42 0.47 15.02 15.02 0.00 471 470 0.21 3.7 3.8 2.67
TW4-25 116.44 120.00 116 120 OK 2953 2949 0.14 6.8 6.81 0.15 15.15 15.13 0.13 410 411 0.24 46.9 47.5 1.27
TW4-26 27.83 25 28 25 Insufficient 5135 5112 0.45 4.26 4.31 1.17 15.7 15.45 1.61 445 447 0.45 55.8 242 125.05
MW-4, TW4-4, TW4-15, TW4-19, and TW4-20 are continually pumped wells.
TW4-1, TW4-2, TW4-6, TW4-7, TW4-1O, TW4-13, TW4-14, and TW4-26 were pumped dry and sampled after recovery.
1-2: Holding Time Evaluation
Holding Time
Location Constituent Holding Time Allowed Holding Time Check
MW-4 Chloroform 11.00 days 14 days OK
MW-4 Chloromethane 14.00 days 14 days OK
MW-4 Methylene chloride 14.00 days 14 days OK
MW-4 Carbon Tetrachloride 14.00 days 14 days OK
MW-4 Nitrogen 17.00 days 28 days OK
MW-4 Chloride 15.00 days 28 days OK
TW4-1 Chloroform 8.00 days 14 days OK
TW4-1 Chloromethane 8.00 days 14 days OK
TW4-1 Methylene chloride 8.00 days 14 days OK
TW4-1 Carbon Tetrachloride 8.00 days 14 days OK
TW4-1 Nitrogen 13.00 days 28 days OK
TW4-1 Chloride 14.00 days 28 days OK
TW4-2 Chloroform 9.00 days 14 days OK
TW4-2 Chloromethane 12.00 days 14 days OK
TW4-2 Methylene chloride 12.00 days 14 days OK
TW4-2 Carbon Tetrachloride 12.00 days 14 days OK
TW4-2 Nitrogen 15.00 days 28 days OK
TW4-2 Chloride 13.00 days 28 days OK
TW4-3 Chloroform 8.00 days 14 days OK
TW4-3 Chloromethane 8.00 days 14 days OK
TW4-3 Methylene chloride 8.00 days 14 days OK
TW4-3 Carbon Tetrachloride 8.00 days 14 days OK
TW4-3 Nitrogen 16.00 days 28 days OK
TW4-3 Chloride 14.00 days 28 days OK
TW4-4 Chloroform 11.00 days 14 days OK
TW4-4 Chloromethane 14.00 days 14 days OK
TW4-4 Methylene chloride 14.00 days 14 days OK
TW4-4 Carbon Tetrachloride 14.00 days 14 days OK
TW4-4 Nitrogen 17.00 days 28 days OK
TW4-4 Chloride 15.00 days 28 days OK
TW4-5 Chloroform 9.00 days 14 days OK
TW4-5 Chloromethane 9.00 days 14 days OK
TW4-5 Methylene chloride 9.00 days 14 days OK
TW4-5 Carbon Tetrachloride 9.00 days 14 days OK
TW4-5 Nitrogen 15.00 days 28 days OK
TW4-5 Chloride 13.00 days 28 days OK
TW4-6 Chloroform 9.00 days 14 days OK
TW4-6 Chloromethane 14.00 days 14 days OK
TW4-6 Methylene chloride 14.00 days 14 days OK
TW4-6 Carbon Tetrachloride 14.00 days 14 days OK
TW4-6 Nitrogen 14.00 days 28 days OK
TW4-6 Chloride 12.00 days 28 days OK
TW4-7 Chloroform 9.00 days 14 days OK
TW4-7 Chloromethane 12.00 days 14 days OK
TW4-7 Methylene chloride 12.00 days 14 days OK
TW4-7 Carbon Tetrachloride 12.00 days 14 days OK
TW4-7 Nitrogen 15.00 days 28 days OK
1-2: Holding Time Evaluation
Holding Time
Location Constituent Holding Time Allowed Holding Time Check
TW4-7 Chloride l3.00 dayJi 28 days OK
TW4-8 Chlorofonn 7.00 days 14 days OK
TW4-8 Chloromethane 7.00 days 14 days OK
TW4-8 Methylene chloride 7.00 days 14 days OK
TW4-8 Carbon Tetrachloride 7.00 days 14 days OK
TW4-8 Nitrogen 15.00 days 28 days OK
TW4-8 Chloride 13.00 days 28 days OK
TW4-9 Chlorofonn 7.00 days 14 days OK
TW4-9 Chloromethane 7.00 days 14 days OK
TW4-9 Methylene chloride 7.00 days 14 days OK
TW4-9 Carbon Tetrachloride 7.00 days 14 days OK
TW4-9 Nitrogen 15.00 days 28 days OK
TW4-9 Chloride l3.00 days 28 days OK
TW4-10 Chlorofonn 9.00 days 14 days OK
TW4-10 Chloromethane 14.00 days 14 days OK
TW4-10 Methylene chloride 14.00 day~ 14 days OK
TW4-10 Carbon Tetrachloride 14.00 days 14 days OK
TW4-l0 Nitrogen 14.00 days 28 days OK
TW4-10 Chloride 12.00 days 28 days OK
TW4-11 Chlorofonn 14.00 days 14 days OK
TW4-ll Chloromethane 14.00 days 14 days OK
TW4-11 Methylene chloride 14.00 days 14 days OK
TW4-11 Carbon Tetrachloride 14.00 days 14 days OK
TW4-11 Nitrogen 14.00 days 28 days OK
TW4-11 Chloride 12.00 days 28 days OK
TW4-12 Chlorofonn 8.00 days 14 days OK
TW4-12 Chloromethane 8.00 days 14 days OK
TW4-12 Methylene chloride 8.00 days 14 days OK
TW4-12 Carbon Tetrachloride 8.00 days 14 days OK
TW4-12 Nitrogen 16.00 days 28 days OK
TW4-12 Chloride 14.00 days 28 days OK
TW4-l3 Chlorofonn 8.00 days 14 days OK
TW4-l3 Chloromethane 8.00 days 14 days OK
TW4-l3 Methylene chloride 8.00 days 14 days OK
TW4-13 Carbon Tetrachloride 8.00 days 14 days OK
TW4-13 Nitrogen 16.00 day~ 28 days OK
TW4-l3 Chloride 14.00 days 28 days OK
TW4-14 Chlorofonn 8.00 days 14 days OK
TW4-l4 Chloromethane 8.00 days 14 days OK
TW4-14 Methylene chloride 8.00 days 14 days OK
TW4-14 Carbon Tetrachloride 8.00 days 14 days OK
TW4-14 Nitrogen 16.00 days 28 days OK
TW4-14 Chloride 14.00 days 28 days OK
TW4-IS Chlorofonn 11.00 days 14 days OK
TW4-IS Chloromethane 14.00 days 14 days OK
TW4-15 Methylene chloride 14.00 days 14 days OK
TW4-1S Carbon Tetrachloride 14.00 day_s 14 days OK
TW4-15 Nitrogen 17.00 days 28 days OK
1-2: Holding Time Evaluation
Holding Time
Location Constituent Holding Time Allowed Holding Time Check
TW4-15 Chloride 15.00 days 28 days OK
TW4-16 Chloroform 9.00 days 14 days OK
TW4-16 Chloromethane 9.00 days 14 days OK
TW4-16 Methylene chloride 9.00 days 14 days OK
TW4-16 Carbon Tetrachloride 9.00 days 14 days OK
TW4-16 Nitrogen 13.00 days 28 days OK
TW4-16 Chloride 14.00 days 28 days OK
TW4-17 Chloroform 11.00 days 14 days OK
TW4-17 Chloromethane 11.00 days 14 days OK
TW4-17 Methylene chloride 11.00 days 14 days OK
TW4-17 Carbon Tetrachloride 11.00 days 14 days OK
TW4-17 Nitrogen 17.00 days 28 days OK
TW4-17 Chloride 15.00 days 28 days OK
TW4-18 Chloroform 9.00 days 14 days OK
TW4-18 Chloromethane 9.00 days 14 days OK
TW4-l8 Methylene chloride 9.00 days 14 days OK
TW4-l8 Carbon Tetrachloride 9.00 days 14 days OK
TW4-18 Nitrogen 14.00 days 28 days OK
TW4-18 Chloride 12.00 days 28 days OK
TW4-19 Chloroform 11.00 days 14 days OK
TW4-19 Chloromethane 14.00 days 14 days OK
TW4-19 Methylene chloride 14.00 days 14 days OK
TW4-19 Carbon Tetrachloride 14.00 days 14 days OK
TW4-19 Nitrogen 17.00 days 28 days OK
TW4-19 Chloride 15.00 days 28 days OK
TW4-20 Chloroform 11.00 d'!)'s 14 days OK
TW4-20 Chloromethane 14.00 days 14 days OK
TW4-20 Methylene chloride 14.00 days 14 days OK
TW4-20 Carbon Tetrachloride 14.00 days 14 days OK
TW4-20 Nitrogen 17.00 days 28 days OK
TW4-20 Chloride 15.00 days 28 days OK
TW4-21 Chloroform 14.00 days 14 days OK
TW4-21 Chloromethane 14.00 days 14 days OK
TW4-21 Methylene chloride 14.00 days 14 days OK
TW4-21 Carbon Tetrachloride 14.00 days 14 days OK
TW4-21 Nitrogen 14.00 days 28 days OK
TW4-21 Chloride 12.00 days 28 days OK
TW4-22 Chloroform 8.00 days 14 days OK
TW4-22 Chloromethane 8.00 days 14 days OK
TW4-22 Methylene chloride 8.00 days 14 days OK
TW4-22 Carbon Tetrachloride 8.00 days 14 days OK
TW4-22 Nitrogen 13.00 days 28 days OK
TW4-22 Chloride 14.00 days 28 days OK
TW4-23 Chloroform 8.00 days 14 days OK
TW4-23 Chloromethane 8.00 days 14 days OK
TW4-23 Methylene chloride 8.00 days 14 days OK
TW4-23 Carbon Tetrachloride 8.00 days 14 days OK
TW4-23 Nitrogen 16.00 days 28 days OK
1-2: Holding Time Evaluation
Holding Time
Location Constituent Holding Time Allowed Holding Time Check
TW4-23 Chloride 14.00 days 28 days OK
TW4-24 Chloroform 9.00 days 14 days OK
TW4-24 Chloromethane 9.00 days 14 days OK
TW4-24 Methylene chloride 9.00 days 14 days OK
TW4-24 Carbon Tetrachloride 9.00 days 14 days OK
TW4-24 Nitrogen 13.00 days 28 days OK
TW4-24 Chloride 14.00 days 28 days OK
TW4-25 Chloroform 8.00 days 14 days OK
TW4-25 Chloromethane 8.00 days 14 days OK
TW4-25 Methylene chloride 8.00 days 14 days OK
TW4-25 Carbon Tetrachloride 8.00 days 14 days OK
TW4-25 Nitrogen 16.00 days 28 days OK
TW4-25 Chloride 14.00 days 28 days OK
TW4-26 Chloroform 9.00 days 14 days OK
TW4-26 Chloromethane 9.00 days 14 days OK
TW4-26 Methylene chloride 9.00 days 14 days OK
TW4-26 Carbon Tetrachloride 9.00 days 14 days OK
TW4-26 Nitrogen 15.00 days 28 days OK
TW4-26 Chloride 13.00 days 28 days OK
TW4-60 Chloroform 10.00 days 14 days OK
TW4-60 Chloromethane 10.00 days 14 days OK
TW4-60 Methylene chloride 10.00 days 14 days OK
TW4-60 Carbon Tetrachloride 10.00 days 14 days OK
TW4-60 Nitrogen 16.00 days 28 days OK
TW4-60 Chloride 14.00 days 28 days OK
TW4-65 Chloroform 8.00 days 14 days OK
TW4-65 Chloromethane 8.00 days 14 days OK
TW4-65 Methylene chloride 8.00 days 14 days OK
TW4-65 Carbon Tetrachloride 8.00 days 14 days OK
TW4-65 Nitrogen 14.00 days 28 days OK
TW4-65 Chloride 19.00 days 28 days OK
TW4-70 Chloroform 11.00 days 14 days OK
TW4-70 Chloromethane 11.00 days 14 days OK
TW4-70 Methylene chloride 11.00 days 14 days OK
TW4-70 Carbon Tetrachloride 11.00 days 14 days OK
TW4-70 Nitrogen 17.00 days 28 days OK
TW4-70 Chloride 15.00 days 28 days OK
Table 1-3 Recipt Temperature Check
Sample Batch Wells in Batch Temperature
CIOO80S18 TW4-3 TW4-3R TW4-5 TW4-SR, TW4-6, TW4-6R 2 ·C
TW4-8, TW4-8R, TW4-9, TW4-9R TW4-lO, TW4-IOR,
TW4-ll TW4-11 R, TW4-12, TW4-12R, TW4-13. TW4-
DR TW4-14, TW4-14R, TW4-IS, TW4-18R, TW4-19,
TW4-19R, TW4-21, TW4-2IR TW4-23, TW4-23R TW4-
2S TW4-2SR, TW4-26 TW4-26R
ClOO80785 MW-4, TW4-2, TW4-2R, TW4-4, TW4-7, TW4-7R, TW4-2 "C
IS, TW4-17, TW4-19 TW4-20, TW4-60, TW4-70, Trip
Blank
TW4-I , TW4-IR, TW4-16 TW4-16R TW4-22 TW4-4"C
ClOOSIOl2 22R, TW4-24, TW4-24R
14 Analytical Method Check
Parameter Method Method Used by Lab
Carbon Tetrachloride SW8260B SW8260B
Chloride A4500-CI B A4S00-CI B
Chloroform SW8260B SW8260B
eb loromethane SW8260B SW8260B
Methylene chloride SW8260B SW8260B
Nitrogen E353.2 E353.2
All parameters were analyzed using the reporting method specificied in the QAP
1-5 Reporting Limit Evaluation
Rqd'
Reporting Qualifier
Location Constituent Lab Reporting Limit Limit Qualifier Check
MW-4 Chlorofonn 100 ugiL 1.0uglL D OK
MW-4 Chloromethane 1 ugiL 1.0uglL U OK
MW-4 Methylene chloride 1 ug/L 1.0ug/L U OK
MW-4 Carbon Tetrachloride 1 ugLL 1.0ug/L OK
MW-4 Nitrogen 0.5 mg/L O.lmg/L D OK
MW-4 Chloride 1 mg/L 1 mg/L OK
TW4-1 Chlorofonn 100 ug/L 1.0ug/L D OK
TW4-1 Chloromethane 1 ug/L 1.0u~ U OK
TW4-1 Methylene chloride 1 ugiL 1.0 ug/L U OK
TW4-1 Carbon Tetrachloride 1 ug/L 1.0ug/L U OK
TW4-1 Nitrogen 0.5 mg/L 0.1 mg/L D OK
TW4-1 Chloride 1 mglL 1 mglL OK
TW4-2 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-2 Methylene chloride 1 ug/L 1.0ug/L U OK
TW4-2 Carbon Tetrachloride 1 ug/L 1.0ug/L OK
TW4-2 Nitrogen 0.5 mg/L O.l mg/L D OK
TW4-2 Chloride 1 mglL I mg/L OK
TW4-3 Chlorofonn I ug/L 1.0ug/L U OK
TW4-3 Chloromethane 1 ugIL 1.0ug/L U OK
TW4-3 Methylene chloride 1 ug/L 1.0ug/L U OK
TW4-3 Carbon Tetrachloride 1 ugiL 1.0ug/L U OK
TW4-3 Nitrogen 0.2 mg/L 0.1 mg/L 0 OK
TW4-3 Chloride 1 mglL 1 mg/L OK
TW4-4 Chlorofonn 100 ugiL 1.0ugiL 0 OK
TW4-4 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-4 Methylene chloride 1 ug/L 1.0ug/L U OK
TW4-4 Carbon Tetrachloride 1 ugiL 1.0ugiL OK
TW4-4 Nitrogen 0.5 mglL 0.1 mglL D OK
TW4-4 Chloride 1 mg/L 1 mg/L OK
TW4-5 Chlorofonn 1 ug/L 1.0ug/L OK
TW4-5 Chloromethane I ugiL 1.0ugiL U OK
TW4-5 Methylene chloride 1 ug/L 1.0ug/L U OK
TW4-5 Carbon Tetrachloride 1 ugiL 1.0ug/L U OK
TW4-5 Nitrogen 1 mg/L 0.1 mg/L D OK
TW4-5 Chloride 1 mg/L 1 mg/L OK
TW4-6 Chlorofonn 100 ugiL 1.0ugiL D OK
TW4-6 Chloromethane 1 ugiL 1.0ug/L U OK
TW4-6 Methylene chloride 1 ug/L 1.0ug/L U OK
TW4-6 Carbon Tetrachloride 1 ug/L 1.0ug/L U OK
TW4-6 Nitrogen 0.2 mglL 0.1 mglL D OK
TW4-6 Chloride 1 mglL 1 mglL OK
TW4-7 Chlorofonn 100 ug/L 1.0ug/L D OK
TW4-7 Chloromethane 1 ug1, 1.0ug/L U OK
TW4-7 Methylene chloride 1 ugiL 1.0ug/L U OK
TW4-7 Carbon Tetrachloride 1 ugiL 1.0ug/L OK
TW4-7 Nitrogen 0.5 m~~ 0.1 mg/l 0 OK
TW4-7 Chloride 1 mglL 1 mglL OK
1-5 Reporting Limit Evaluation
Rqd'
Reporting Qualifier
Location Constituent Lab Reporting Limit Limit Qualifier Check
TW4-8 Chloroform 1 ug/L 1.0ug/L U OK
TW4-8 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-8 Methylene chloride 1 ug/L 1.0ug/L U OK
TW4-8 Carbon Tetrachloride 1 ug/L 1.0ug/L U OK
TW4-8 Nitrogen 0.1 mg/L 0.1 mgIL U OK
TW4-8 Chloride 1 mg/L 1 mg/L OK
TW4-9 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-9 Methylene chloride 1 ug/L 1.0ugiL U OK
TW4-9 Carbon Tetrachloride 1 ug/L 1.0 ug/L U OK
TW4-9 Nitrogen 0.2 mg/L 0.1 mg/L D OK
TW4-9 Chloride 1 mg/L 1 mg/L OK
TW4-10 Chloroform 20ug/L 1.0ug/L D OK
TW4-10 Chloromethane 1 ugiL 1.0uglL U OK
TW4-10 Methylene chloride 1 ugiL 1.0ugiL U OK
TW4-10 Carbon Tetrachloride 1 ug/L 1.0ug/L U OK
TW4-10 Nitrogen 0.1 mg/L 0.1 mglL OK
TW4-10 Chloride 1 mglL 1 mglL OK
TW4-11 Chloroform 100 ugiL 1.0uglL D OK
TW4-11 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-11 Methylene chloride 1 ugiL 1.0ug/L U OK
TW4-11 Carbon Tetrachloride 1 ugiL 1.0uglL U OK
TW4-11 Nitrogen 0.5 mglL 0.1 mg[L D OK
TW4-11 Chloride 1 mg/L 1 mg/L OK
TW4-12 Chloroform 1 ug/L 1.0ug/L U OK
TW4-12 Chloromethane 1 ugiL 1.0ug/L U OK
TW4-12 Methylene chloride 1 ug[L 1.0ug/L U OK
TW4-12 Carbon Tetrachloride 1 ug/L 1.0ug/L U OK
TW4-12 Nitrogen 1 mg/L 0.1 mg/L D OK
TW4-12 Chloride 1 mg/L I mg/L OK
TW4-13 Chloroform 1 ug/L 1.0ug/L U OK
TW4-13 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-13 Methylene chloride 1 ug/L 1.0ugiL U OK
TW4-13 Carbon Tetrachloride 1 ugiL 1.0ug/L U OK
TW4-13 Nitrogen 0.5 mglL 0.1 mg/L D OK
TW4-13 Chloride 1 mg/L 1 mg/L OK
TW4-14 Chloroform 1 ug/L 1.0ug/L U OK
TW4-14 Chloromethane 1 ug/L 1.0ugiL U OK
TW4-14 Methylene chloride 1 ug/L 1.0ugiL U OK
TW4-14 Carbon Tetrachloride 1 ug/L 1.0ug/L U OK
TW4-14 Nitrogen 0.2 mg/L 0.1 mg/L D OK
TW4-14 Chloride 1 mg/L 1 mg/L OK
TW4-15 Chloroform 100 ug/L 1.0ug/L D OK
TW4-15 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-15 Methylene chloride 1 ug/L 1.0 ug/L OK
TW4-15 Carbon Tetrachloride 1 ugiL 1.0ug/L U OK
TW4-15 Nitrogen 0.1 mg/L 0.1 mg/L OK
TW4-15 Chloride 1 mg/L 1 mg/L OK
TW4-16 Chloroform 1 ug/L 1.0ugiL OK
I -5 Reporting Limit Evaluation
Rqd'
Reporting Qualifier
Location Constituent Lab Reporting Limit Limit Qualifier Check
TW4-16 Chloromethane I ug/L 1.0ug/L U OK
TW4-16 Methylene chloride 1 ugIL 1.0ug/L U OK
TW4-16 Carbon Tetrachloride 1 ugIL 1.0ugIL U OK
TW4-16 Nitrogen 0.2 mgIL 0.1 mg/L 0 OK
TW4-16 Chloride 1 mg/L 1 mg/L OK
TW4-17 Chloroform 1 ug/L 1.0ug/L U OK
TW4-17 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-17 Methylene chloride 1 ug/L 1.0ug/L U OK
TW4-17 Carbon Tetrachloride 1 ug/L 1.0 ugIL U OK
TW4-17 Nitrogen 0.1 mg/L 0.1 mg/L U OK
TW4-17 Chloride 1 mg/L 1 mgIL OK
TW4-18 Chloroform 1 ug/L 1.0ug/L OK
TW4-18 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-18 Methylene chloride 1 ug/L 1.0ugIL U OK
TW4-18 Carbon Tetrachloride 1 ug/L 1.0ug/L U OK
TW4-18 Nitrogen 1 mgIL 0.1 mg/L D OK
TW4-18 Chloride 1 mg/L 1 mg/L OK
TW4-19 Chloroform 100ug/L 1.0Ug/L D OK
TW4-19 Chloromethane 1 ug/L 1.0 ug/L U OK
TW4-19 Methylene chloride 1 ug/L 1.0 ug/L U OK
TW4-19 Carbon Tetrachloride 1 ug/L 1.0ug/L OK
TW4-19 Nitrogen 0.5 mg/L 0.1 mg/L 0 OK
TW4-19 Chloride 1 mg/L 1 mgIL OK
TW4-20 Chloroform 1000 ug/L 1.0ug/L 0 OK
TW4-20 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-20 Methylene chloride 1 ug/L 1.0ug/L OK
TW4-20 Carbon Tetrachloride 1 ug/L 1.0ug/L OK
TW4-20 Nitrogen 0.5 mgLL 0.1 mg/L 0 OK
TW4-20 Chloride 1 mg/L 1 mg/L OK
TW4-21 Chloroform 100ug/L 1.0ug/L 0 OK
TW4-21 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-21 Methylene chloride 1 ug/L 1.0 ug/L U OK
TW4-21 Carbon Tetrachloride 1 ug/L 1.0ug/L OK
TW4-21 Nitrogen 1 mg/L 0.1 mg/L 0 OK
TW4-21 Chloride 1 mgIL 1 mg/L OK
TW4-22 Chloroform 100 ug/L 1.0ugIL 0 OK
TW4-22 Chloromethane 1 ug!!, 1.0 ug/l OK
TW4-22 Methylene chloride 1 ug/L 1.0 ug/L OK
TW4-22 Carbon Tetrachloride 1 ug/L l.0 ug/L OK
TW4-22 Nitrogen 1 mg/L 0.1 mg/L D OK
TW4-22 Chloride 1 mg1, 1 mg/L OK
TW4-23 Chloroform 1 ug/L 1.0 ug/L U OK
TW4-23 Chloromethane 1 ug/L 1.0 ug/L U OK
TW4-23 Methylene chloride 1 ug/L 1.0ug/L U OK
TW4-23 Carbon Tetrachloride 1 ug/L 1.0 ug/L U OK
TW4-23 Nitrogen 0.1 mg/L 0.1 mg/L U OK
TW4-23 Chloride 1 mg/L 1 mg/L OK
TW4-24 Chloroform 1 ug/L 1.0 ug/L OK
1-5 Reporting Limit Evaluation
Rqd'
Reporting Qualifier
Location Constituent Lab Reporting Limit Limit Qualifier Check
TW4-24 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-24 Methylene chloride 1 ug/L 1.0 ug/L U OK
TW4-24 Carbon Tetrachloride 1 ug/L 1.0uglL U OK
TW4-24 Nitrogen I mg/L 0.1 mg/L D OK
TW4-24 Chloride 1 mg/L 1 mg/L OK
TW4-25 Chloroform 1 ug/L 1.0 ug/L U OK
TW4-25 Chloromethane 1 ug/L 1.0 ug/L U OK
TW4-25 Methylene chloride 1 ug/L 1.0ug/L U OK
TW4-25 Carbon Tetrachloride 1 ug/L 1.0 ug/L U OK
TW4-25 Nitrogen 1 mgLL 0.1 mg/L D OK
TW4-25 Chloride 1 mg/L 1 mg/L OK
TW4-26 Chloroform 1 ug/L 1.0 ug/L OK
TW4-26 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-26 Methylene chloride 1 ug/L 1.0ug/L U OK
TW4-26 Carbon Tetrachloride 1 ug/L 1.0ug/L U OK
TW4-26 Nitrogen 1 mglL 0.1 mg/L D OK
TW4-26 Chloride 1 mg/L 1 mg/L OK
TW4-60 Chloroform I ug/L 1.0 ug/L U OK
TW4-60 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-60 Methylene chloride 1 ug/L 1.0 ug/L U OK
TW4-60 Carbon Tetrachloride 1 ug/L 1.0ug/L U OK
TW4-60 Nitrogen 0.1 mg/L 0.1 mg/L U OK
TW4-60 Chloride 1 mg/L 1 mg/L U OK
TW4-65 Chloroform 100 ug/L 1.0ug/L D OK
TW4-65 Chloromethane 1 ug/L 1.0ug/L OK
TW4-65 Methylene chloride 1 ug/L 1.0ug/L OK
TW4-65 Carbon Tetrachloride 1 ug/L 1.0ug/L OK
TW4-65 Nitrogen 1 mg/L 0.1 mg/L D OK
TW4-65 Chloride 1 mg/L 1 mg/L OK
TW4-70 Chloroform 1 ug/L 1.0ug/L U OK
TW4-70 Chloromethane 1 ug/L 1.0ug/L U OK
TW4-70 Methylene chloride 1 ug/L 1.0ug/L U OK
TW4-70 Carbon Tetrachloride 1 ug/L 1.0ug/L U OK
TW4-70 Nitrogen 0.1 mg/L 0.1 mg/L U OK
TW4-70 Chloride 1 mg/L 1 mg/L OK
1·6 Trip Blank Evaluation
Lab Report Constitu ent Result
CIOO805 18 Carbon tetrachloride NO ugiL
Chlorofonn NO ugiL
Chloromethane NO ug L
Methylene chloride NO u L
CIOO80785 Carbon tetrachloride NO u L
Chlorofonn NO ug
Chloromethane NO u
Methylene chloride NO u L
CIOO8 1012 Carbon tetrachloride NO ui!lL
Chlorofonn NO ugIL
Chloromethane NO ugiL
Methylene chloride NO ui!lL
1-7 QAlQC Evaluation for Sample Duplicates
Constituent TW4-21 TW4-65 %RPD
Carb.on Tetrachloride 9.2 12 26
Chloride 278 269 3
ClllorofoJIn 390 650 50
Ch loromethane 0 l) 0
Methylene Chloride .0 Q 0
Nitrate 14 15 '!J
Constituent TW4-17 TW4-70 %RPD
Carbon Tetrachloride 0 0 0
Chloride 28 26 7
Chloroform 0 0 0
Ch loromethane 0 0 0
Methylene Chloride 0 0 a
Nitrate 0 0 0
1-8 QC Control Limits for Analysis and Blanks
Matrix Spike % Recovery Comparison
MS MSD REC
Lab Report Lab Sample ID Well Analyte %REC %REC Range RPD
CI0080518 C I 0080518-029 TW4-21 Methylene Chloride 147 140 70 -130 4.5
CI0080518 C I 0080785-009 TW4-20 Carbon Tetrachloride 140 138 70 -130 2
ClO080518 C I 0080785-009 TW4-20 Chloroform 141 136 70 -130 1.9
CI0080518 ClO080785-009 TW4-20 Chloromethane 156 142 70 -130 9.4
ClO080785 C 1 0080785-002 TW4-19 Methylene Chloride 132 120 70 -130 9.8
ClO080785 C 10080785-002 TW4-19 Chloroform 80 131 70 -130 17
CI0080785 CI0080785-015 TW4-2R Carbon Tetrachloride 134 143 70 -130 6.4
ClO080785 C I 0080785-0 15 TW4-2R Chloromethane 135 144 70 -130 6.3
ClO080785 ClO080785-015 TW4-2R Chloroform 129 135 70 -130 6.1
ClO080785 CI0080785-015 TW4-2R Methylene Chloride 130 137 70 -130 4.8 --
NA = MS samples were not Denison samples.
SUrrogate % Recovery
Lab
Specified QAP
REC Required
Lab Report Well/Sample Analyte Surrogate %REC Range Range
ClO080518 TW4-5 p-Bromotluorobenzene 122 80 -120 None
ClO080518 TW4-18 p-Bromotluorobenzene 122 80 -120 None
ClO080518 TW4-26R p-Bromotluorobenzene 122 80 -120 None
ClO080785 TW4-20 Dibromotluoromethane 67 70 -130 None
ClO081012 TW4-22 p-Bromofluorobenzene 132 80 -120 None
ClO081012 TW4-22 Dibromofluoromethane 122 70 -130 None
ClO081012 TW4-24 p-Bromofl uorobenzene 131 70 -130 None
CI0081012 TW4-22 p-Bromotluorobenzene 123 80 -120 None
CI0081012 Method Blank p-Bromotluorobenzene 131 80 -120 None
LCS % Recovery
QAP
Lab Specified REC Required
Lab Report Analyte Surrogate -JoREC Range Range
CI0080785 Chloromethane 136 70 -130 None
1-9 Rinsate Evaluation
Result for
Previous Previous Well
Rinsate Sample Parameter Rinsate Result Sample Date Well Sampled
TW4-12R Nitrogen 0.1 mg/L TW4-3
TW4-13R Nitrogen 0.1 mg/L TW4-12
TW4-SR Nitrogen 0.1 mg/L TW4-25
TW4-6R Chloroform 6.2 ug/L TW4-1O
TW4-11R Chloroform 2.1 ugIL TW4-6
TW4-7R Chloroform 1.1 ug/L TW4-11
TW4-2R Chloroform 1.7 ugIL TW4-7
TW4-24R Nitrogen 0.1 mgIL NA
TW4-22R Nitrogen 0.1 mgl!-TW4-16
TW4-1R Nitrogen 0.1 mgIL TW4-22
TW4-1R Chloroform S.2 ug/L TW4-22
PreviOus well sampled IS the well that the pump was used to purge pnor to the rmsate sample.
D = Reporting limit raised due to dilution/sample matrix.
Sampled
3.1 mg/L
9 mg/L
14 mgIL
100 mgIL
630 ugIL
SOO ugIL
1500 ugIL
NA mg/L
4.6 mgIL
15 mg/L
340 ug/L
Rinsate
Reporting
Qualifier Limit
D 0.1 mg/L
D 0.1 mg/L
D 0.1 mgIL
D 1.0 ugIL
D 1.0 ugIL
D 1.0ugIL
D 1.0ugIL
0.1 mgIL
D 0.1 mgIL
D 0.1 mgIL
D 1.0 ugIL
TabJ
Kriged Current Quarter Chloroform Isoconcentration Map
11
fI
r(
\1
r' ~-\..j
~-::::-
~f
1/ II
I'
II // ~ #.-. "
I ~I ~=~-
0
MW-4
.1900
0 1500
PIEZ-1
Q NS
" ,I
" I' ,/
II 32
"
" I' II
II
II
I' ,I
II
,I
\
• M~-21
II
II
N
II
\\
~ ~ ~
SCALE IN FEET
EXPLANATION
~ ~
perched monitoring well showing
concentration in uG/1
temporary perched monitoring well
showing concentration in uG/1
perched piezometer (not sampled)
MW-G2 eNS
PROPERTY
BOUNDARY
\\
\\
\\
II
II
II
II
II
rJll II
II
'I l~ II
(t
~
CELL NO.1
MW'()1
eNS
~l
ONs TWN-7
CELL NO.2
ONS TWN-15
ONS
TWN-10
ONS TWN-11
ONS TWN-14
ONS
MW-18
eNS
ONS
TWN-18
ONs TWN-3
NO
OlliS
TWN-6
ONS
TWN-8
ONS
N-4
TWN-9
PIEZ-1
"NS
MW-19
e NS
PIEZ-2
"Ns
MILL §ITE ON~ PIEZ-3
TWN-~ .. NS "'=us=:;; 0
012
OND
OND
H~~OND
Mw-h5 ~s CELL NO. 48
I
MW~3S--Ml/Y-34 MJA'-~
-¢-N -9NS -eN
~
MW'()3 eNS
MW-20 eND
~~ --=--'-'::~--=--~~:-
3000
MW-17 eNS
33
PIEZ-4 .l-.:=::--=--==-.=:.=--
"NS /
PIEZ-5
"NS
/ ~ /
T378
T385
II ~-=-~~~-=-4-=--=--=--=--=--=--=--=--=--=--=--=-/ ~'-..// A.<-----J..l ""--==-
MW-22 eND
II
/7
/7
/7
/7
/7
/7
/7
/7
/7
/7
NOTES: ND = not detected, NS = not sam Died
ONS TWN-12
~ ~
[]
~
\
TWN-l ~NS
TW4-26
temporary perched nitrate
monitoring well (not sampled)
temporary perched monitoring well installed
HYDRO
GEO
KRIGED 3rd QUARTER, 2010 CHLOROFORM (uG/L)
WHITE MESA SITE
~5 May, 2010 showing concentration in uG/1
MW-34 perched monitoring well installed
-¢-NS August/September, 2010 (not sampled)
CHEM, INC. APPROVED
SJS
DATE REFERENCE
H:/718000/nov1 0/chl081 O.srf
FIGURE
TabK
Analyte Concentrations Over Time
Chloroform Carbon Chloromethane Methylene Nitrate Chloride MW-4 Tetrachloride
I' (ug/l) (u2/1) (ugll) Chloride (ug/l) (mgll) (mgll)
28-Sep-99 6200
28-Sep-99 5820
28-Sep-99 6020
15-Mar-00 5520
15-Mar-00 5430
2-Sep-00 5420 9.63
30-Nov-00 6470 9.37
29-Mar-Ol 4360 8.77
22-Juo-Ol 6300 9.02
20-Sep-Ol 5300 9.45
8-Nov-Ol 5200 8
26-Mar-02 4700 8.19
22-May-02 4300 8.21
12-Sep-02 6000 8.45
24-Nov-02 2500 8.1
28-Mar-03 2000 8.3
30-Apr-03 3300 NA
30-May-03 3400 8.2
23-Juo-03 4300 8.2
30-Jul-03 3600 8.1
29-Aug-03 4100 8.4
12-Sep-03 3500 8.5
15-0ct-03 3800 8.1
8-Nov-03 3800 8
29-Mar-04 NA NA
22-Jun-04 NA NA
17-Sep-04 3300 6.71
17-Nov-04 4300 7.5
16-Mar-05 2900 6.3
25-May-05 3170 NA NA NA 7.1 NA
31-Aug-05 3500 <10 <10 <10 7.0 NA
I-Dec-05 3000 <50 <50 <50 7.0 NA
9-Mar-06 3100 <50 <50 50 6 49
14-Juo-06 3000 <50 <50 50 6 49
20-Ju1-06 2820 <50 <50 <50 1.2 48
9-Nov-06 2830 2.1 1.4 <1 6.4 50
28-Feb-07 2300 1.6 <1 <1 6.3 47
27-Juo-07 2000 1.8 <1 <1 7 45
15-Aug-07 2600 1.9 <1 <1 6.2 47
10-Oct-07 2300 1.7 <1 <1 6.2 45
26-Mar-08 2400 1.7 <1 <] 5.8 42
25-Juo-08 2500 1.6 <1 <I 6.09 42
10-Sep-08 1800 1.8 <1 <1 6.36 35
IS-0ct-08 2100 1.7 <1 <1 5.86 45
4-Mar-09 2200 1.5 <1 <I 5.7 37
Chloroform Carbon Chlorometbane Methylene Nitrate Chloride MW-4 Tetrac.hloride (~gll) (uwl) (ugll) Chloride (ugll) (mgll) (mg/I)
23-Jun-09 1800 1.3 <1 <1 5.2 34
14-Sep-09 2000 1.4 <1 <I 5.3 43
14-0ec-09 1800 1.6 NO NO 5.8 44
17-Feb-IO 1600 1.2 NO ND 4 45
14-Jun-10 2100 1.2 NO NO 5.1 41
16-Aug-10 1900 1.5 NO NO 4.8 38
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-1 (ugll) Tetrachloride (ug/l) Chloride (mg/l) (mg/l) (ug/l) (ug/l)
28-Jun-99 1700 7.2
10-Nov-99 5.8
I5-Mar-00 1100
10-Apr-00 1490
6-Jun-00 1530
2-Sep-00 2320 5.58
30-Nov-00 3440 7.79
29-Mar-OI 2340 7.15
22-Jun-0 1 6000 8.81
20-Sep-01 12.8
8-Nov-01 3200 12.4
26-Mar-02 3200 13.1
22-May-02 2800 12.7
] 2-Sep-02 3300 12.8
24-Nov-02 3500 13.6
28-Mar-03 3000 12.4
23-Jun-03 3600 12.5
12-Sep-03 2700 12.5
8-Nov-03 3400 11.8
29-Mar-04 3200 11
22-Jun-04 3100 8.78
] 7-Sep-04 2800 10.8
I7-Nov-04 3000 11.1
16-Mar-05 2700 9.1
25-May-05 3080 NA NA NA 10.6 NA
31-Aug-05 2900 <]0 <10 <]0 9.8 NA
I-Dec-05 2400 <50 <50 <50 9.7 NA
9-Mar-06 2700 <50 <50 <50 9.4 49
14-Jun-06 2200 <50 <50 <50 9.8 48
20-Jul-06 2840 <50 <50 <50 9.7 51
8-Nov-06 2260 1.4 <1 <1 9.4 47
28-Feb-07 1900 l.2 <1 <1 8.9 47
27-Jun-07 1900 1.4 <1 <1 9 45
15-Aug-07 2300 1.3 <1 <1 8.4 43
10-Oct-07 2000 1.3 <1 <1 7.8 43
26-Mar-08 2000 1.3 <1 <1 7.6 39
25-Jun-08 1900 l.1 <1 <1 8.68 39
10-Sep-08 1700 1.3 <1 <] 8.15 35
] 5-0ct-08 1700 1.3 <1 <] 9.3 41
Chloroform Garbon Chloromethane Methylene Nitrate Chloride TW4-1 (ug/l) Tetrachloride (ug/l) Chloride (mg/I) (mg/l) (ug/I) (ug/l)
II-Mar-09 1700 1.1 <1 <1 7.5 37
24-Jun-09 1500 1 <1 <1 6.9 37
15-Sep-09 1700 <1 <I <I 7.3 36
29-0ec-09 1400 <1 <I <I 6.8 41
3-Mar-10 1300 <1 <1 <) 7.1 35
15-Jun-10 1600 1.2 <1 <1 6.8 40
24-Aug-IO 1500 <1 <1 <1 6.8 35
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-2 (ugll) Tetrachloride (ugll) Cbloride (mgll) (mg/l) (uWl) (uWI)
10-Nov-99 2510
2-Sep-00 5220
28-Nov-00 4220 10.7
29-Mar-01 3890 10.2
22-Jun-01 5500 9.67
20-Sep-OI 4900 11.4
8-Nov-Ol 5300 10.1
26-Mar-02 5100 9.98
23-May-02 4700 9.78
12-Sep-02 6000 9.44
24-Nov-02 5400 10.4
28-Mar-03 4700 9.5
23-Jun-03 5100 9.6
I2-Sep-03 3200 8.6
8-Nov-03 4700 9.7
29-Mar-04 4200 9.14
22-Jun-04 4300 8.22
17-Sep-04 4100 8.4
I7-Nov-04 4500 8.6
16-Mar-05 3700 7.7
25-May-05 3750 8.6
31-Aug-05 3900 <10 <10 <10 8 NA
I-Dec-05 3500 <50 <50 <50 7.8 NA
9-Mar-06 3800 <50 <50 <50 7.5 56
I4-Jun-06 3200 <50 <50 <50 7.1 56
20-Jul-06 4120 <50 <50 <50 7.4 54
8-Nov-06 3420 2.3 <1 <1 7.6 55
28-Feb-07 2900 1.8 <1 <1 7.3 54
27-Jun-07 3000 2.5 <1 <1 7.8 50
15-Aug-07 340 2.2 <1 <I 7.3 49
IO-Oct-07 3200 2.1 <1 <1 6.9 51
26-Mar-08 3300 2.3 <I <1 6.9 48
25-Jun-08 3100 2.2 <1 <1 7.44 46
10-Sep-08 2800 2.4 <1 <1 7.1 42
15-0ct-08 3200 2.4 <2 <2 7.99 47
1I-Mar-09 3100 2.2 <1 <1 6.5 46
24-Jun-09 2800 2 <1 <1 6.4 44
15-Sep-09 3000 2 <1 <1 6.6 43
29-Dec-09 1600 2 <1 <1 6.4 46
Carbon Chloromethane Tetracblorjde TW4-2 (ug/l)
Chloroform Carbon Chloromethane Methylene Nitrate Chloride II TW4-3 (ugll) Tetrachloride (ugll) Chloride (mgll) (mg/l) (uf!ll) (uf!ll)
28-Jun-99 3500 7.6
29-Nov-99 702
15-Mar-00 834
2-Sep-00 836 1.56
29-Nov-00 836 1.97
27-Mar-OI 347 1.85
2I-Jun-Ol 390 2.61
20-Sep-01 300 3.06
7-Nov-01 170 3.6
26-Mar-02 11 3.87
21-May-02 204 4.34
12-Sep-02 203 4.32
24-Nov-02 102 4.9
28-Mar-03 0 4.6
23-Jun-03 0 4.8
12-Sep-03 0 4.3
8-Nov-03 0 4.8
29-Mar-04 0 4.48
22-Jun-04 0 3.68
17-Sep-04 0 3.88
17-Nov-04 0 4.1
16-Mar-05 0 3.5
25-May-05 <1 NA NA NA 3.7 NA
31-Aug-OS <1 <1 6.4 <1 3.5 NA
I-Dec-OS <I <I 2.3 <1 3.3 NA
9-Mar-06 <I <1 2.2 <1 3.3 26
I4-Jun-06 <1 <1 <1 <1 3.2 26
20-Jul-06 <1 <1 1.6 <1 2.9 26
8-Nov-06 <1 <1 <1 <1 1.5 23
28-Feb-07 <1 <1 <1 <1 3.1 22
27-Jun-07 <1 <1 <1 <1 3.3 23
lS-Aug-07 <1 <1 <1 <1 3.1 24
10-0ct-07 <1 <1 <1 <1 2.8 27
26-Mar-08 <1 <1 <I <1 2.8 21
25-Jun-08 <1 <1 <1 <1 2.85 19
10-Sep-08 <1 <1 <1 <1 2.66 19
I5-0ct-08 <1 <1 <1 <1 2.63 22
4-Mar-09 <1 <1 <1 <I 2.5 21
24-Jun-09 <1 <1 <1 <1 2.9 20
Cbloroform Carbon Ohloromethane , Metbylene Nitrate Chloride TW4-3 I. Tetracbloride CblolTide II
" (ugll) (ugll) (mg/l) (mgll) (u£/I) (ue/I)
15-Sep-09 <1 <1 <I <I 2.8 21
16-Dec-09 <1 <I <1 <I 2.5 22
23-Feb-IO <1 <1 <I. <\ 2.8 23
8-Jun-IO <1 <1 <I <I 3 24
IO-Aug-'IO <1 <1 <1 <1 3.1 22
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-4 (ugll) Tetrachloride (ugll) Chloride (mg/I) (mg/l) (ug/l) (u2l1)
6-Jun-00 0
2-Sep-00 0
28-Nov-00 3.9
28-Mar-01 2260 1.02
20-Jun-0 1 3100 14.5
20-Sep-01 3200 14
8-Nov-Ol 2900 14.8
26-Mar-02 3400 15
22-May-02 3200 13.2
12-Sep-02 4000 13.4
24-Nov-02 3800 12.6
28-Mar-03 3300 13.4
23-Jun-03 3600 12.8
12-Sep-03 2900 12.3
8-Nov-03 3500 12.3
29-Mar-04 3200 12.2
22-Jun-04 3500 12.l
17-Sep-04 3100 11.1
17-Nov-04 3600 10.8
16-Mar-05 3100 11.6
25-May-05 2400 NA NA NA 11.3 NA
3I-Aug-05 3200 <10 <TO <10 9.9 NA
I-Dee-OS 2800 <50 <50 <50 10.2 NA
9-Mar-06 2900 <50 <50 <50 9.5 51
I4-Jun-06 2600 <50 <50 <50 8.6 48
20-Jul-06 2850 <50 <50 <50 9.7 50
8-Nov-06 2670 1.7 <1 <1 10.1 49
28-Feb-07 2200 1.5 <1 <1 9 49
27-Jun-07 2400 1.7 <1 <1 9.4 47
15-Aug-07 2700 1.5 <1 <1 9.5 45
10-0et-07 2500 1.5 <1 <1 9.5 47
26-Mar-08 2800 1.6 <1 <1 9.2 43
25-Jun-08 2500 1.5 <1 <1 lO.8 42
IO-Sep-08 2200 1.4 <1 <1 8.83 39
IS-0et-08 2500 2 <2 <2 10.1 44
4-Mar-09 2200 1.2 <1 <1 10.2 37
24-Jun-09 1800 1.2 <1 <1 8.2 34
I5-Sep-09 2000 1.1 <1 <1 8.4 39
29-Dee-09 950 1.1 <1 <1 7.6 41
TW4-4 Chloromethane
(ugll)
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-5 (ugll) Tetrachloride (ugll) Chloride (mgll) (mgll) (uell) (ue/l)
20-Dee-99 29.5
15-Mar-00 49.0
2-Sep-00 124
29-Nov-00 255
28-Mar-01 236
20-Jun-01 240
20-Sep-01 240
7-Nov-01 260
26-Mar-02 260
22-May-02 300
12-Sep-02 330
24-Nov-02 260
28-Mar-03 240
23-Jun-03 290
12-Sep-03 200
8-Nov-03 240
29-Mar-04 210
22-Jun-04 200
17-Sep-04 150
17-Nov-04 180
16-Mar-05 120
25-May-05 113 NA NA NA 3.7 NA
31-Aug-05 82.0 <2.5 5.8 <2.5 6 NA
I-Dee-05 63.0 <2.5 2.5 <2.5 6 NA
9-Mar-06 66.0 <2.5 3.1 <2.5 6 52
14-Jun-06 51.0 <1 <2.5 <2.5 5.9 51
20-Jul-06 53.7 <1 <] <] 6.7 54
8-Nov-06 47.1 <1 <1 <1 2.9 55
28-Feb-07 33.0 <1 <1 <1 7.8 57
27-Jun-07 26.0 <1 <1 <1 7 45
15-Aug-07 9.2 <1 <1 <1 7.7 38
10-0et-07 9.4 <1 <1 <1 8.2 39
26-Mar-08 11.0 <1 <1 <1 7.4 36
25-Jun-08 9.3 <1 <1 <1 8.7 37
10-Sep-08 11.0 <1 <1 <1 7.91 34
15-0et-08 10.0 <1 <I <I 9.3 37
4-Mar-09 12.0 <1 <1 <1 7.9 34
24-Jun-09 13.0 <1 <1 <1 7.5 37
15-Sep-09 12.0 <1 <1 <1 8.3 48
Chloroform Carbon Chloromethane Metbylene Nitrate Chloride TW4-5 (ug/l) Tetrachlolide (ugll) Chloride (mgll) (mgll) (uWl) (uell)
22-Dec-09 8.5 <1 <I <I 7.5 41
25-Feb-10 13 .0 <1 <1 <I 6.8 43
9-Jun-LO 12.0 <1 <I <I 7.1 28
ll-Aug-LO 12.0 <1 <I <1 7 38
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-6 Tetrachloride Cbloride (ugll) (uwO, (ugll) (uWl) (mgll) (mglJ)
6-Jun-00 0
2-Sep-00 0
28-Nov-00 0 NO
26-Mar-Ol 0 0.13
20-Jun-OI 0 NO
20-Sep-Ol 4 NO
7-Nov-Ol I NO
26-Mar-02 0 ND
21-May-02 0 NO
12-Sep-02 0 NO
24-Nov-02 0 NO
28-Mar-03 0 0.1
23-Jun-03 0 NO
12-Sep-03 0 NO
8-Nov-03 0 NO
29-Mar-04 0 NO
22-Jun-04 0 NO
17-Sep-04 0 ND
17-Nov-04 0 NO
16-Mar-05 0 0.2
25-May-05 2.5 NA NA NA 0.4 NA
31-Aug-05 10.0 <1 2.8 <1 0.8 NA
I-Dec-05 17.0 <1 1.3 <1 0.9 NA
9-Mar-06 31.0 <1 <1 <I l.2 31
14-Jun-06 19.0 <1 <1 <1 1 30
20-Jul-06 11.0 <1 <1 <I 0.6 37
8-Nov-06 42.8 <1 <I <1 1.4 65
28-Feb-07 46.0 <I <1 <1 l.5 32
27-Jun-07 11.0 <1 <1 <1 0.6 38
15-Aug-07 18.0 <1 <I <I 0.7 36
10-Gct-07 18.0 <I <1 <1 0.8 38
26-Mar-08 52.0 <1 <1 <1 1.1 33
25-Jun-08 24.0 <I <1 <I 0.9 35
10-Sep-08 39.0 <1 <1 <I 1.I4 35
15-Gct-08 37.0 <1 <1 <1 1.01 33
II-Mar-09 81.0 <1 <1 <1 2.2 35
24-Jun-09 120 <1 <1 <1 2.7 37
15-Sep-09 280 <1 <1 <1 5.0 37
22-0ec-09 250 <1 <1 <I 6.1 41
25-Feb-l0 1000 <1 <1 <1 1.6 45
IO-Jun-l0 590 <1 <1 <1 2.5 33
12-Aug-10 630 <1 <1 <1 3.9 31
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-6 Tetrachloride Chloride (ugll) (uWl) (ugll) (uWl) (mg/I) (mgll)
6-Jun-00 0
2-Sep-00 0
2S-Nov-00 0 NO
26-Mar-Ol 0 0.13
20-Jun-01 0 NO
20-Sep-Ol 4 ND
7-Nov-01 I ND
26-Mar-02 0 ND
21-May-02 0 NO
12-Sep-02 0 ND
24-Nov-02 0 ND
2S-Mar-03 0 0.1
23-Jun-03 0 ND
12-Sep-03 0 ND
8-Nov-03 0 NO
29-Mar-04 0 ND
22-Jun-04 0 ND
17-Sep-04 0 ND
17-Nov-04 0 ND
I6-Mar-05 0 0.2
25-May-05 2.5 NA NA NA 0.4 NA
3I-Aug-05 10.0 <1 2.S <1 O.S NA
I-Dee-05 17.0 <1 1.3 <1 0.9 NA
9-Mar-06 31.0 <I <1 <I 1.2 31
14-Jun-06 19.0 <I <1 <1 1 30
20-Jul-06 11.0 <I <1 <I 0.6 37
8-Nov-06 42.8 <I <I <1 1.4 65
2S-Feb-07 46.0 <1 <I <1 1.5 32
27-Jun-07 11.0 <I <I <I 0.6 38
15-Aug-07 18.0 <1 <I <I 0.7 36
10-Oet-07 18.0 <I <I <1 0.8 38
26-Mar-OS 52.0 <1 <1 <I 1.1 33
25-Jun-08 24.0 <I <1 <1 0.9 35
IO-Sep-08 39.0 <1 <1 <1 1.14 35
I5-0ct-08 37.0 <1 <1 <I 1.01 33
II-Mar-09 81.0 <1 <I <I 2.2 35
24-Jun-09 120 <1 <1 <1 2.7 37
I5-Sep-09 280 <1 <1 <I 5.0 37
22-Dee-09 250 <I <I <I 6.1 41
25-Feb-IO 1000 <I <I <1 1.6 45
10-Jun-1O 590 <1 <1 <1 2.5 33
I2-Aug-IO 630 <I <I <I 3.9 31
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-7 (ugll) Tetrachloride (ugll) Chloride (mg/l) (mgll) (ug/l) _(ugll)
29-Nov-99 256
15-Mar-00 616
2-Sep-00 698
29-Nov-00 684 1.99
28-Mar-Ol 747 2.46
20-Jun-Ol 1100 2.65
20-Sep-Ol 1200 3.38
8-Nov-Ol 1100 2.5
26-Mar-02 1500 3.76
23-May-02 1600 3.89
12-Sep-02 1500 3.18
24-Nov-02 2300 4.6
28-Mar-03 1800 4.8
23-Jun-03 5200 7.6
12-Sep-03 3600 7.6
8-Nov-03 4500 7. I
29-Mar-04 2500 4.63
22-Jun-04 2900 4.83
17-Sep-04 3100 5.59
17-Nov-04 3800 6
16-Mar-05 3100 5.2
25-May-05 2700 NA NA NA 5.4 NA
31-Aug-05 3100 <10 <10 <10 5.2 NA
I-Dee-05 2500 <50 <50 <50 5.3 NA
9-Mar-06 1900 <50 <50 <50 1 48
14-Jun-06 2200 <50 <50 <50 4.5 47
20-JuJ-06 2140 <50 <50 <50 4.7 51
8-Nov-06 2160 1.5 <1 <1 4.6 49
28-Feb-07 1800 1.1 <1 <1 5 47
27-Jun-07 2600 1.5 <1 <1 5.1 45
14-Aug-07 2300 1.4 <1 <1 4.7 44
10-0ct-07 1900 1.2 <1 <1 4.7 45
26-Mar-08 2200 1.3 <1 <1 4.2 43
25-Jun-08 1800 1.3 <1 <1 4.8 43
10-Sep-08 1600 1.4 <1 <1 4.16 35
15-0ct-08 1900 <2 <2 <2 4.01 40
ll-Mar-09 1800 1.2 <1 <1 3.7 35
24-Jun-09 1400 <1 <1 <1 3.8 37
15-Sep-09 1500 1.0 <1 <1 4.1 37
TW4-7 Chloromethane
(ug/l)
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-8 (ug/l) Tetrachloride (ug/l) Chloride (mg/l) (mg/l) (u2/1) , (u2l1)
29-Nov-99 0
IS-Mar-OO 21.S
2-Sep-00 102
29-Nov-00 107 NO
26-Mar-Ol 116 NO
20-Jun-Ol ISO NO
20-Sep-01 ISO 0.35
7-Nov-Ol ISO NO
26-Mar-02 190 0.62
22-May-02 210 0.77
12-Sep-02 300 ND
24-Nov-02 450 ND
2S-Mar-03 320 O.S
23-Jun-03 420 ND
12-Sep-03 66.0 ND
S-Nov-03 21.0 0.1
29-Mar-04 24.0 0.65
22-Jun-04 110 0.52
17-Sep-04 120 ND
17-Nov-04 120 ND
16-Mar-05 10.0 ND
2S-May-OS <1 NA NA NA 0.2 NA
31-Aug-OS 1.1 <1 1.7 <1 <0.1 NA
30-Nov-OS <1 <1 <1 <1 <O.l NA
9-Mar-06 1.3 <1 2.1 <1 0.3 39
14-Jun-06 1.0 <1 1.S <1 <0.1 37
20-Jul-06 <1 <1 <1 <1 0.1 39
S-Nov-06 <1 <1 <1 <I <0.1 40
2S-Feb-07 2.5 <1 <1 <1 0.7 39
27-Jun-07 2.5 <1 <1 <1 0.2 42
IS-Aug-07 1.5 <1 <1 <1 <O.l 42
IO-Gct-07 3.5 <1 <1 <1 0.5 43
26-Mar-OS <1 <1 <1 <1 0.1 46
2S-Jun-OS <1 <1 <1 <1 <0.05 45
10-Sep-OS <1 <1 <1 <1 <0.05 39
IS-Gct-OS <1 <1 <1 <1 <0.05 44
4-Mar-09 <1 <I <1 <1 <0.1 42
24-Jun-09 <1 <1 <1 <1 <0.1 44
IS-Sep-09 <1 <1 <1 <1 <1 44
TW4-8 Chloromethane
(ug/I)
II Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-9 (ugll) Tetrachloride (ug/l) Cbloride (mg/l) (mgll) (u2ll) ,(u2/1)
20-Dee-99 4.2
15-Mar-00 1.9
2-Sep-00 14.2
29-Nov-00 39.4 ND
27-Mar-Ol 43.6 ND
20-Jun-Ol 59.0 0.15
20-Sep-Ol 19.0 0.4
7-Nov-Ol 49.0 0.1
26-Mar-02 41.0 0.5
22-May-02 38.0 0.65
12-Sep-02 49.0 0.2
24-Nov-02 51.0 0.6
28-Mar-03 34.0 0.6
23-Jun-03 33.0 0.8
12-Sep-03 32.0 1.1
8-Nov-03 46.0 1.1
29-Mar-04 48.0 0.82
22-Jun-04 48.0 0.75
17-Sep-04 39.0 0.81
17-Nov-04 26.0 I.2
16-Mar-05 3.8 1.3
25-May-05 1.2 NA NA NA 1.3 NA
31-Aug-05 <1 <1 2.9 <1 1.3 NA
I-Dee-OS <1 <1 <1 <1 1.3 NA
9-Mar-06 <1 <1 2.6 <1 1.5 38
14-Jun-06 <1 <1 2.7 <1 1.5 39
20-Jul-06 <1 <1 <1 <1 0.9 41
8-Nov-06 <1 <1 <1 <1 0.7 44
28-Feb-07 <1 <1 <1 <1 0.6 44
27-Jun-07 21 <1 <1 <1 1.3 42
15-Aug-07 9.5 <1 <1 <1 1.8 38
10-0et-07 8.7 <1 <1 <1 2 40
26-Mar-08 1.3 <1 <1 <J 2.1 35
25-Jun-08 1.0 <1 <1 <1 2.3 35
10-Sep-08 <1 <1 <1 <1 2.79 28
15-0et-08 <1 <1 <1 <1 1.99 58
4-Mar-09 <1 <1 <1 <J 2.5 30
24-Jun-09 <1 <1 <1 <1 2.3 30
15-Sep-09 <1 <1 <1 <1 2.5 30
IJ Chloroform Carbon Chloromethane Methylene Nitrate Cbloride TW4-9 (u~tn Tetracbloride (ug/l) Chloride (mg/l) (mgll) (U211) (U211)
17-0ec-09 <1 <1 <I <I 1.7 37
23-Feb-lO <1 <I <1 <1 1.7 47
9-Jun-1O <1 <1 <I <I 1.5 33
ll-Aug-lO <1 <1 <\ <1 1.2 40
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-10 (ug/l) Tetrachloride (ug/l) Chloride (mg/l) (mg/l) (uWl) (ugll)
21-Jan-02 14
26-Mar-02 16 0.14
21-May-02 17 0.11
12-Sep-02 6 ND
24-Nov-02 14 ND
28-Mar-03 29 0.2
23-Jun-03 110 0.4
12-Sep-03 74 0.4
8-Nov-03 75 0.3
29-Mar-04 22 0.1
22-Jun-04 32 ND
17-Sep-04 63 0.46
17-Nov-04 120 0.4
16-Mar-05 140 1.6
25-May-05 62.4 NA NA NA 0.8 NA
31-Aug-05 110 <2.5 6.2 <2.5 1.1 NA
I-Dee-05 300 <2.5 <2.5 <2.5 3.3 NA
9-Mar-06 190 <5 <50 <50 2.4 50
14-Jun-06 300 <5 <50 <50 3.5 54
20-Jul-06 504 <5 <50 <50 6.8 61
8-Nov-06 452 <1 1.6 1 5.7 58
28-Feb-07 500 <1 <1 1 7.6 62
27-Jun-07 350 <1 <1 1 5.1 54
15-Aug-07 660 <1 <1 1 7.3 59
10-Oet-07 470 <1 <1 1 6.7 59
26-Mar-08 620 <1 <1 1 7.3 55
25-Jun-08 720 <1 <1 1 9.91 58
10-Sep-08 680 <1 <1 1 9.23 51
15-0et-08 1200 <2 <2 2 10.5 61
ll-Mar-09 1100 <I <1 1 1l.6 64
24-Jun-09 1200 <I <I I 9.8 62
15-Sep-09 910 <1 <1 1 8.1 51
22-Dee-09 300 <I <I <1 3.5 51
3-Mar-IO 460 <I <1 <1 5 49
1 O-Jun-I 0 220 <1 <1 <1 1.6 42
12-Aug-1O 100 <1 <I <I 0.8 38
Chloroform Carbon Chloromethane Methylene Nitrate Chloride , TW4-11 (ug/l) Tetrachloride (ug/l) Chloride (ugll) (mgll) (mgll) (uwl)
21-Jan-02 4700
26-Mar-02 4900 9.6
22-May-02 5200 9.07
12-Sep-02 6200 8.84
24-Nov-02 5800 9.7
28-Mar-03 5100 9.7
23-Jun-03 5700 9.4
12-Sep-03 4600 9.9
8-Nov-03 5200 9.3
29-Mar-04 5300 9.07
22-Jun-04 5700 8.74
17-Sep-04 4800 8.75
17-Nov-04 5800 9.7
16-Mar-05 4400 8.7
25-May-05 3590 NA NA NA 10.3 NA
31-Aug-05 4400 <10 <10 <10 9.4 NA
I-Dee-OS 4400 <100 <100 <100 9.4 NA
9-Mar-06 4400 <50 <50 <50 9.2 56
14-Jun-06 4300 <50 <50 <50 10 56
20-JuJ-06 4080 <50 <50 <50 10 55
8-Nov-06 3660 1.7 2.7 1.3 10 55
28-Feb-07 3500 1.3 <1 1.6 10.1 54
27-Jun-07 3800 1.6 <1 1.1 10.6 53
I5-Aug-07 4500 1.7 <1 1.1 10.2 53
10-Oet-07 4400 1.6 <1 1.2 9.8 53
26-Mar-08 340 <1 <I <1 7.7 63
25-Jun-08 640 <I <1 <1 7.28 46
10-Sep-08 900 <1 <1 <1 7.93 42
IS-Oet-08 1000 <2 <2 <2 9.46 47
ll-Mar-09 1100 <1 <1 <I 7.3 49
24-Jun-09 980 <1 <1 <1 6.8 44
15-Sep-09 1000 <1 <1 <1 7 49
29-Dee-09 860 <1 <1 <1 6.6 46
3-Mar-IO 820 <1 <1 <1 6.8 42
IO-Jun-IO 820 <1 <I <I 6.9 40
12-Aug-IO 800 <1 <1 <1 6.7 43
I' Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-12 Tetrachloride Chloride (ug/l) (U2/1) (ug/l) (U2:/I) (mg/I) (mgll)
"
12-Sep-02 2 2.S4
24-Nov-02 0 2.2
28-Mar-03 0 1.9
23-Jun-03 0 1.8
12-Sep-03 0 1.8
9-Nov-03 0 1.6
29-Mar-04 0 1.58
22-Jun-04 0 1.4
17-Sep-04 0 1.24
17-Nov-04 0 1.S
16-Mar-OS 0 1.4
25-May-05 <I NA NA NA 1.6 NA
31-Aug-OS <1 <1 5.S <J 1.S NA
I-Dec-OS <1 <1 1.9 <2 1.4 NA
9-Mar-06 <1 <1 2.6 <I 1.3 19
14-Jun-06 <1 <1 1.4 <I 1.4 16
20-Jul-06 <1 <1 <1 <1 1.4 16
S-Nov-06 <1 <1 <1 <1 1.4 16
2S-Feb-07 <1 <1 <1 <1 1.S 16
27-Jun-07 <1 <1 <1 <1 1,S IS
15-Aug-07 <1 <1 <1 <1 1.4 29
lO-Oct-07 <1 <1 <1 <I 1.4 16
26-Mar-OS <1 <1 <1 <I 1.6 16
2S-Jun-OS <1 <1 <I <I 2.69 19
10-Sep-OS <I <1 <1 <1 2.6S IS
IS-Oct-OS <1 <1 <1 <1 2.47 22
4-Mar-09 <1 <1 <1 <1 2.4 23
24-Jun-09 <1 <1 <1 <1 3.S 22
IS-Sep-09 <1 <1 <1 <1 S.1 22
16-Dec-09 <1 <1 <1 <1 3.6 23
23-Feb-l0 <1 <1 <1 <1 4 22
S-Jun-l0 <1 <1 <1 <1 11 29
10-Aug-10 <1 <1 <1 <1 9 35
Carbon Chlorom Methylen
TW4-13 Chloroform Tetrachlo ethane e Nitrate Chloride
I~ (ugll) ride (ugll) Chloride (mgll) (mgll)
(uell) (ue/l)
12-Sep-02 ND ND
24-Nov-02 ND ND
28-Mar-03 ND 0.2
23-Jun-03 ND 0.2
12-Sep-03 ND ND
9-Nov-03 ND 0.9
29-Mar-04 ND 0.12
22-Jun-04 ND 0.17
17-Sep-04 ND 4.43
17-Nov-04 ND 4.7
16-Mar-05 ND 4.2
25-May-05 <1 NA NA NA 4.3 NA
31-Aug-05 <1 <1 3.1 <1 4.6 NA
I-Dec-05 <I <1 <1 <1 4.3 NA
9-Mar-06 <1 <1 1.7 <1 4.2 67
14-Jun-06 <I <1 1.4 <1 4.9 66
20-Jul-06 <1 <1 <1 <I 4.3 65
8-Nov-06 <1 <1 <\ <I 0.8 33
28-Feb-07 <1 <1 <1 <1 4 59
27-Jun-07 <1 <1 <1 <1 4.6 59
15-Aug-07 <1 <1 <1 <1 4.4 58
IO-Gct-07 <1 <1 <1 <1 4.1 58
26-Mar-08 <1 <1 <1 <1 3.8 54
25-Jun-08 <1 <1 <1 <I 4.24 58
10-Sep-08 <1 <1 <1 <1 4.26 50
I5-Gct-08 <1 <1 <1 <I 4.63 58
4-Mar-09 <1 <I <1 <I 3.1 58
24-Jun-09 <1 <I <1 <1 1.2 57
15-Sep-09 <I <I <1 <I 4.7 63
16-Dec-09 <I <1 <I <1 4.1 60
24-Feb-IO <1 <1 <1 <1 4.3 53
8-Jun-l0 <1 <I <1 <I 5.2 52
10-Aug-1O <1 <I <I <I 5.6 55
Cbloroform Carbon Cblorometbane Metbylene Nitrate Cbloride
i'l TW4-14 (ugll) Tetracbloride (ug/l) Cbloride (mg/l) (mg/l) (uWl) (ugll)
8-Nov-06 <1 <1 <1 <1 2.4 37
28-Feb-07 <1 <1 <1 <1 2.3 38
27-Jun-07 <1 <1 <1 <1 1.4 38
15-Aug-07 <1 <1 <1 <1 l.l 36
10-0ct-07 <1 <1 <1 <1 0,8 36
26-Mar-08 <1 <1 <1 <1 0,04 S7
25-Jun-08 <1 <1 <I <I 1.56 35
10-Sep-08 <1 <1 <1 <1 1.34 34
IS-Oct-08 <1 <1 <1 <1 0.76 40
4-Mar-09 <1 <1 <1 <1 1.6 35
24-Jun-09 <1 <1 <1 <1 1.4 36
15-Sep-09 <1 <1 <I <1 l.5 38
16-Dec-09 <1 <1 <1 <1 1.4 34
3-Mar-rO <1 <1 <1 <1 2.5 33
8-Jun-IO <1 <1 <1 <1 2.9 49
10-Aug-10 <1 <1 <1 <1 2.8 35
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-15 (ug/l) Tetrachloride (ug/l) Chloride (mgll) (mg/l) (uWl) (U2/1)
12-Sep-02 3 NO
24-Nov-02 0 NO
28-Mar-03 0 0.1
23-Jun-03 7800 14.5
15-Aug-03 7400 16.8
12-Sep-03 2500 2.7
25-Sep-03 2600 2.5
29-0ct-03 3100 3.1
8-Nov-03 3000 2.8
29-Mar-04 NA NA
22-Jun-04 NA NA
17-Sep-04 1400 0.53
17-Nov-04 300 0.2
16-Mar-05 310 0.3
30-Mar-05 230 0.2
25-May-05 442 NA NA NA 0.2 NA
31-Aug-05 960 <5 5.4 <5 0.2 NA
I-Dec-05 1000 <50 <50 <50 0.3 NA
9-Mar-06 1100 <50 <50 <50 0.2 52
14-Jun-06 830 <50 <50 <50 0.2 52
20-Ju1-06 2170 <50 <50 <50 1.4 65
8-Nov-06 282 <1 <1 2.8 0.3 54
28-Feb-07 570 <1 <1 5.5 0.5 56
27-Jun-07 300 <1 <1 13 0.4 49
15-Aug-07 ]400 <T <1 36 1 57
10-0ct-07 2000 <1 <1 14 0.6 57
26-Mar-08 930 <1 <1 40 0.1 49
25-Jun-08 1300 <1 <1 53 0.56 57
IO-Sep-08 630 <1 <1 24 0.24 44
I5-0ct-08 1700 <1 <] 100 0.65 64
4-Mar-09 950 <1 <1 51 0.4 49
24-Jun-09 410 <1 <1 12 0.2 48
15-Sep-09 850 <1 <1 30 0.1 46
]4-Dec-09 1100 <1 <1 40 2.3 60
17-Feb-l0 780 <1 <1 19 0.2 57
9-Jun-l0 1900 <1 <1 28 1.1 58
16-Aug-1O 2200 <1 <1 21 0.6 49
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-16 (ug/l) Tetrachloride (ug/l) Chloride (mg/l) (mg/l) (U2/1) (u2ll)
12-Sep-02 140 ND
24-Nov-02 200 ND
28-Mar-03 260 ND
23-Jun-03 370 ND
12-Sep-03 350 ND
8-Nov-03 400 ND
29-Mar-04 430 ND
22-Jun-04 530 ND
17-Sep-04 400 ND
17-Nov-04 350 ND
16-Mar-05 240 ND
25-May-05 212 NA NA NA <0.1 NA
31-Aug-05 85 <1 3.2 43 <0.1 NA
I-Dee-OS 14 <2.5 2.6 5.9 1.4 NA
9-Mar-06 39.0 <1 1.1 21 3 60
14-Jun-06 13.0 <1 2.4 8.9 l.9 55
20-Jul-06 5.2 <1 <1 2.7 2.7 60
8-Nov-06 13.6 <1 <1 9.2 5.6 62
28-Feb-07 8.7 <1 <1 6.5 12.3 79
27-Jun-07 2.6 <1 <1 1.8 9.9 75
15-Aug-07 7.1 <1 <1 5.1 5.4 66
IO-Oet-07 1.4 <1 <1 <1 4.4 69
26-Mar-08 11.0 <I <1 26 ND 52
25-Jun-08 <1 <1 <1 <1 1.46 58
10-Sep-08 10 <1 <1 14 10.5 71
15-0et-08 3.9 <1 <1 6.6 9.82 89
4-Mar-09 <1 <1 <1 <1 9.6 78
24-Jun-09 <1 <1 <1 <1 8.9 76
15-Sep-09 <1 <1 <I <1 8.8 79
17-Dee-09 <1 <1 <1 <1 5.2 76
24-Feb-10 <1 <1 <1 <1 4.2 77
9-Jun-l0 2.1 <I <1 <1 4.7 64
24-Aug-l0 4.3 <1 <1 <1 4.6 72
I' Carbon Methylene
TW4-17 Chloroform Tetrachloride Chloromethane Chloride Nitrate Chloride
(ugll) (uglll (ug/l) (uell) (mgll) (mg/l)
12-Sep-02 1.6 ND
24-Nov-02 ND ND
28-Mar-03 NO NO
23-Jun-03 ND NO
12-Sep-03 ND NO
8-Nov-03 ND NO
29-Mar-04 ND NO
22-Jun-04 ND ND
17-Sep-04 ND . ND
17-Nov-04 ND NO
16-Mar-OS ND NO
30-Mar-OS ND NO
2S-May-OS <1 NA NA NA <0.1 NA
31-Aug-OS <1 <1 3.2 <1 <0.1 NA
I-Dee-OS <1 <1 <1 <1 <0.1 NA
9-Mar-06 <1 <1 <1 <1 <0.1 32
14-Jun-06 <1 <1 3.S <1 <O.l 30
20-Jul-06 <1 <1 1.8 <1 <0.1 32
8-Nov-06 <1 <1 I.S <1 <0.1 31
28-Feb-07 <1 <1 <1 <1 <0.1 32
27-Jun-07 <1 <1 <1 <1 <0.1 32
lS-Aug-07 <1 <1 <I <1 <0.1 31
10-0et-07 <1 <1 <1 <I <0.1 32
26-Mar-08 <1 <1 <1 <1 <0.1 31
2S-Jun-08 <1 <1 <1 <1 <O.OS 29
10-Sep-08 <1 <1 <1 <1 <O.OS 30
IS-Oet-08 <1 <1 <1 <1 <O.OS 26
4-Mar-09 <1 <I <1 <1 <0.1 30
24-Jun-09 <1 <1 <1 <1 <0.1 31
lS-Sep-09 <1 <1 <J <J <0.1 33
16-Dee-09 <1 <1 <1 <1 <0.1 34
17-Feb-10 <1 <1 <1 <1 <0.1 38
14-Jun-10 <1 <1 <1 <1 <0.1 32
16-Aug-IO <1 <1 <1 <1 <0.1 28
" Carbon Methylene
TW4-18 Chloroform Tetrachloride Chloromethane Chloride Nitrate Chloride
(ug/l) (U2/1) (ug/l) (U2/1) (mg/l) (mg/l)
12-Sep-02 440 1.49
24-Nov-02 240 l3.3
28-Mar-03 160 l3.1
23-Jun-03 110 19
12-Sep-03 68.0 19.9
9-Nov-03 84.0 20.7
29-Mar-04 90.0 14
22-Jun-04 82.0 12.2
17-Sep-04 38.0 14.5
17-Nov-04 51.0 17.3
16-Mar-OS 38.0 14.1
2S-May-05 29.8 NA NA NA 12.9 NA
31-Aug-OS 39 <1 2.8 <1 l3.3 NA
1-Dec-OS 14 <1 l.l <1 7.3 NA
9-Mar-06 12.0 <1 1.1 <1 S.9 5.9
14-Jun-06 12.0 <1 1.6 <1 4.7 3S
20-Jul-06 10.8 <1 2.7 <1 6.1 3S
8-Nov-06 l39 <1 <1 <1 8.7 34
28-Feb-07 9.2 <I <1 <1 S.l 30
27-Jun-07 8.0 <1 <1 <1 4.9 28
15-Aug-07 8.9 <1 <1 <1 S 32
10-0ct-07 7.4 <1 <1 <1 4.4 27
26-Mar-08 6.4 <1 <1 <1 0.7 23
2S-Jun-08 5.7 <1 <1 <1 4.55 23
10-Sep-08 8.0 <1 <1 <1 4.68 26
lS-0ct-08 9.4 <1 <1 <1 S,15 30
4-Mar-09 11.0 <1 <I <I 5.2 29
24-Jun-09 16.0 <1 <1 <1 6.2 30
lS-Sep-09 l3.0 <1 <1 <1 5.9 26
22-Dec-09 8.2 <1 <1 <1 S.4 30
24-Feb-10 69.0 <1 <1 <1 S.l 41
9-Jun-1O 29.0 <I <1 <I 9 35
12-Aug-10 29.0 <1 <1 <1 9 37
Chloroform Carbon Chlorometbane Methylene Nitrate Chloride TW4-19 (ugll) Tetrachloride (ug/l) Chloride (mg/l) (mgll) (UWI.) (ugtL) ~
12-Sep-02 7700 47.6
24-Nov-02 5400 42
28-Mar-03 4200 61.4
15-May-03 4700 NA
23-Jun-03 4500 11.4
15-Jul-03 2400 6.8
15-Aug-03 2600 4
12-Sep-03 2500 5.7
25-Sep-03 4600 9.2
29-0ct-03 4600 7.7
9-Nov-03 2600 4.8
29-Mar-04 NA NA
22-Jun-04 NA NA
16-Aug-04 7100 9.91
17-Sep-04 2600 4.5
17-Nov-04 1800 3.6
16-Mar-05 2200 5.3
25-May-05 1200 5.7
31-A~g-05 1400 <5 <5 <5 4.6 NA
I-Dec-05 2800 <50 <50 <50 <0.1 NA
9-Mar-06 1200 <50 <50 <50 4 86
14-Jun-06 1100 <50 <50 <50 5.2 116
20-Jul-06 1120 <50 <50 <50 4.3 123
8-Nov-06 1050 1.6 2.6 <1 4.6 134
28-Feb-07 1200 l.3 <1 <1 4 133
27-Jun-07 1800 2.3
15-Aug-07 1100 1.9 <1 <1 4.1 129
10-Oct-07 1100 1.9 <1 <1 4 132
26-Mar-08 1800 2.9 <1 <1 2.2 131
25-Jun-08 1000 1 <1 <1 2.81 128
10-Sep-08 3600 8.6 <I <1 36.2 113
15-0ct-08 4200 12 <1 <1 47.8 124
4-Mar-09 1100 1.2 <1 <1 3.2 127
24-Jun-09 990 1.2 <1 <1 2.4 132
15-Sep-09 6600 15 <1 <1 0.1 43
14-Dec-09 4700 16 <1 <1 26.7 124
17-Feb-l0 940 1.3 <1 <I 2 144
9-Jun-l0 1800 4.2 <1 <1 4.4 132
j Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-20 (ug/l) Tetrachloride (ugll) Chloride (mg/l) (mg/l) (uWI) (uWl)
25-May-05 39000 NA NA NA 10.1 NA
31-Aug-05 3800 <10 <10 <10 2.9 NA
I-Dee-05 19000 <250 <250 <250 1.8 NA
9-Mar-06 9200 <500 <500 <500 3.8 120
14-Jun-06 61000 <500 <500 <500 9.4 235
20-Jul-06 5300 <1000 <1000 <1000 2.9 134
8-Nov-06 11000 7.1 1.9 2.2 3.5 124
28-Feb-07 4400 3.1 <1 1.1 4.2 T24
27-Jun-07 1800 2.2 <1 <1 2.3 112
15-Aug-07 5200 3.5 <1 1.8 2.1 117
IO-Oet-07 9000 6.8 <1 1.9 5.6 170
26-Mar-08 13000 9 <1 1.5 0.9 132
25-Jun-08 30000 13 <1 1.2 7.96 191
10-Sep-08 21000 15 <1 3.7 4.44 156
15-0ct-08 NA NA NA NA 5.51 166
4-Mar-09 8200 5.7 <1 5.2 5.1 164
24-Jun-09 6800 4.9 <2 4.2 2.9 164
15-Sep-09 13000 8.4 <2 4.4 3.3 153
14-Dee-09 15000 14 <1 3 5.3 187
17-Feb-10 3500 2.7 <1 3.2 2 179
14-Jun-10 18000 11 <1 3.7 5.6 200
16-Aug-10 15000 12 <1 2.2 5.3 196
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-21 (ug/l) Tetrachloride (ug/l) Chloride (mg/l) (mg/l) (uell) _(ug/l)
25-May-05 192 NA NA NA 14.6 NA
31-Aug-05 78 <5 <5 <5 10.1 NA
I-Dec-05 86 <1 1.0 <1 9.6 NA
9-Mar-06 120 <2.5 <2.5 <2.5 8.5 347
14-Jun-06 130 <2.5 <2.5 <2.5 10.2 318
20-Jul-06 106 <2.5 <2.5 <2.5 8.9 357
8-Nov-06 139 2 <1 <1 8.7 296
28-Feb-07 160 1.8 <1 <1 8.7 306
27-Jun-07 300 5.8 <1 <1 8.6 327
15-Aug-07 140 <1 <1 <1 8.6 300
10-Oct-07 120 <1 <1 <1 8.3 288
26-Mar-08 380 7 <1 <\ 14.3 331
25-Jun-08 160 1.7 <1 <1 8.81 271
10-Sep-08 120 1.6 <I <1 7.57 244
15-0ct-08 170 2 <1 <2 8.00 284
II-Mar-09 180 <1 <1 <1 8.3 279
24-Jun-09 200 <1 <1 <1 8.l 291
15-Sep-09 140 <1 <1 <1 9.2 281
22-Dec-09 160 <1 <1 <1 8.4 256
25-Feb-l0 170 <I <1 <1 8.4 228
10-Jun-l0 210 1.2 <1 <1 12 266
12-Aug-l0 390 9.2 <1 <1 14 278
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-22 (ugll) Tetrachloride (ugll) Chloride (mgll) (mgll) (uell) l (ue:ll)
2S-May-OS 340 NA NA NA 18.2 NA
31-Aug-OS 290 <S <5 <S IS.7 NA
I-Dee-OS 320 <5 <S <5 IS.l NA
9-Mar-06 390 <10 <10 <10 IS.3 236
14-Jun-06 280 <10 <10 <10 14.3 221
20-Jul-06 864 <10 <10 <10 14.5 221
8-Nov-06 3S0 <1 1.6 <I 15.9 236
28-Feb-07 440 <1 <1 <1 20.9 347
27-Jun-07 740 <1 <1 <1 19.3 273
15-Aug-07 S30 <1 <1 <1 19.3 2S9
10-Oet-07 440 <1 <\ <1 18.8 238
26-Mar-08 1400 <1 <\ <1 39.1 S19
2S-Jun-08 1200 <1 <1 <1 41.9 271
10-Sep-08 6300 1.3 <1 <I 38.7 524
IS-Oet-08 630 <2 <2 <2 36.3 539
lI-Mar-09 390 <1 <I <1 20.7 177
24-Jun-09 730 <1 <1 <1 20.6 177
15-Sep-09 2300 <1 <1 <1 40.3 391
29-Dee-09 380 <1 <1 <1 17.8 175
3-Mar-l0 2200 <1 <1 <1 36.6 427
1S-Jun-lO 540 <1 <1 <1 19 134
24-Aug-l0 340 <1 <1 <1 IS 130
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-23 (ug/l) Tetrachloride (ug/l) Chloride (mg/I) (mg/l) (U2/1) (u2/1)
27-Jun-07 <1 <1 <1 <1 <0.1 47
15-Aug-07 <1 <1 <I <J <0.1 46
IO-Oct-07 <1 <1 <1 <I <0.1 43
26-Mar-08 <1 <1 <1 <1 <0.1 41
25-Jun-08 <I <I <1 <1 <0.05 41
10-Sep-08 <1 <I <1 <I <0.05 35
IS-Oct-08 <2 <2 <2 <2 <0.05 51
4-Mar-09 <1 <1 <1 <1 <0.1 41
24-Jun-09 <1 <I <1 <1 <0.1 43
1S-Sep-09 <1 <1 <1 <J <0.1 43
16-Dec-09 <1 <J <1 <1 <0.1 37
24-Feb-lO <1 <1 <1 <1 <0.1 45
8-Jun-1O <1 <1 <1 <1 <0.1 40
10-Aug-lO <1 <1 <1 <1 <0.1 40
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-24 (ugll) Tetrachloride (ugll) Chloride (mgll) (mgll) (ue/I) (uIVI)
27-Jun-07 2.6 <1 <1 <1 26.1 770
15--Aug-07 2.2 <1 <1 <1 29 791
IO-Oct-07 1.5 <I <1 <1 24.7 692
26-Mar-08 1.5 <1 <1 <1 24.4 740
25-Jun-08 1.4 <1 <1 <1 45.3 834
10-Sep-08 2.9 <I <1 <1 38.4 1180
15-0ct-08 <2 <2 <2 <2 44.6 1130
4-Mar-09 1.4 <1 <1 <I 30.5 1010
24-Jun-09 1.5 <1 <1 <1 30.4 759
15-Sep-09 1.4 <1 <1 <1 30.7 618
17-Dec-09 1.2 <1 <1 <1 28.3 1080
25-Feb-IO 1.3 <1 <1 <1 33.1 896
9-Jun-10 1.7 <1 <1 <1 30 639
24-Aug-10 1.8 <1 <1 <1 31 587
Chloroform Carbon Chloromethane Methylene Nitrate Chloride ,
TW4-25 Tetrachloride Chloride (ugll) (U2/1) (ugII) (u2/1) (mgll) (mgll)
27-Jun-07 <I <1 <1 <1 17.1 395
15-Aug-07 <1 <1 <1 <1 16.7 382
10-Oct-07 <1 <1 <1 <1 17 356
26-Mar-08 <1 <1 <1 <1 18.7 374
25-Jun-08 <1 <1 <! <1 22.1 344
10-Sep-08 <1 <1 <1 <1 18.8 333
15-0ct-08 <2 <2 <2 <2 21.3 366
4-Mar-09 <1 <1 <1 <1 15.3 332
24-Jun-09 <I <T <I <I 15.3 328
15-Sep-09 <1 <1 <1 <1 3.3 328
16-Dec-09 <1 <1 <1 <1 14.2 371
23-Feb-l0 <I <1 <1 <1 14.4 296
8-Jun-IO <I <1 <1 <1 16 306
1 O-Aug-l 0 <1 <1 <1 <1 14 250
TW4-26
Carbon
Tetrachloride Ghloromethane
(ug/l)
TabL
Chloroform Concentration Trend Graphs
o
->. o o o '" o o o
(ug/L)
w o o o
~ o o o
01 o o o
0) o o o
Sep-99 I 7 /1.
Dec-99 -
Mar-DO
Jun-OO
Sep-OO
Dec-DO
Mar-01
Jun-01
Sep-01
Dec-01
Mar-02
Jun-02
Sep-02 -I
Dec-02 -
Mar-03 -
Jun-03
;~~~E t 1 1 11
Sep-04
Dec-04
Mar-05 -
Jun-05
Sep-05 -
Dec-05
Mar-06 -
Jun-06 -
Sep-06
Dec-06 -
Mar-07
Jun-07
Sep-07
Dec-07 ..
Mar-DB
Jun-OB
Sep-OB -
Dec-DB
Mar-09
Jun-09 •
Sep-09
Dec-09
Mar-10
Jun-10
-...,J o o o
s: ~ I
() :r
o a 0' ..,
3
~
c
(1) en
r------r------r----,-----.----...---.,----.--l ~-JdV-~
6o-lnr-9
90-qa;l-lZ
90-I:>O-O~
tn CI)
:::J ~ -90-ABIIII-9Z E ...
.2 e of! .c
0 vo-uer-v~
"I"'" I ~
-zo-das-~
96-lnr-vl
0 0 0 0 0 0 0 0 0 a 0 0 0 0 0 0 0 0 0 0 0 0
l"-cc 10 V (\') N ..-
(1/6n)
TW4-2 Chloroform Values
7000
6000 I •
5000
4000 -...J -Cl
::J
-3000
2000
Data point represented corresponds
1000 I I to laboratory results. The value is
likely underestimated due to
laboratory error not considering the
dilution factor of 10.
I a
co Ol ~ N V LO CD co Ol a N Ol Ol a a a a a a a ~ ~ I I ..!.. I I I I I I I ..!.. :; u c.. r::: >-(3 .0 :; > Q) c.. Q) rn rn Q) 0 c.. -, « 0 -, « I 0 CJ) -, ~ LL I Z V I I I I I I I CD I I
N CD Ol ..r-co a N co ~
N N
a
o ~-J\oN-B ~
60-lnr-9
90-PO-O~
en CI)
::::I
ns >
E 90-ABV\I-BZ ... .E 0 ...
.2 .c
0
"1 VO-UBr-V~
'lit ~
zo-das-~
66-0aO-9
-B6-lnr-vZ
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
LO 0 LO 0 LO 0 LO 0 LO
"<t "<t «) «) N N ~
(1,6n)
I/)
CD ::::s
iii > E ... .E 0 Ii.. .2 .c 0
10 I ~
.-------r-----.------,---...,-----.------r-------,.. Z ~ -Jd't;f-~
60-1nr-9
90-qa:l-ZZ
90-l:>Q-O ~
90-AelN-9Z
170-uer-v ~
zo-das-~
-66-:>aO-9
1----+----1-----1----+---1---+---+ 96-lnr-17Z
o o ('I)
o LO N
o o N
o LO ..-
o o ..-
o LO
o
m ::::J
~
E .E 0 ... 0 :c 0
CD I ~
e~/LOlvO
-60/901LO
-Salle/cO
90/0~/0~
90/Se/90
pOlv~no
lO/~0/60
~0/6 ~/VO
66/90Il~
l-----~---~---+_---+_---+_---+ S6/PeILO
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TabM
CSV Transmittal Letter
Kathy Weinel
From:
Sent:
To:
Cc:
Subject:
Attachments:
Dear Mr. lundberg,
Kathy Weinel
Wednesday, October 20,201010:54 AM
[e-mail]
Jo Ann Tischler; David Frydenlund
Transmittal of CSV Files White Mesa Mill 2010 Q3 Chloroform Monitoring
C10080518 (2).csv; C10080785.csv; C10081012.csv
Attached to this e-mail are electronic copies of laboratory results for chloroform monitoring conducted at the White
Mesa Mill during the third quarter of 2010, in Comma Separated Value (CSV) format.
Please contact me at 303-389-4134 If you have any questions on this transmittal.
Yours Truly
Kathy Weinel
Denison Mines (USA) Corp.
Quality Assurance Manager
1
TabN
Disinfection Byproducts -Trihalomethanes
1:SasIc IntormatIOn about DIsmtectIOn tlyproducts m Drmkmg Water: Iotal lnhalomethan ... Page I 01 j
"'rBA""'''-Oa7"l:::':;---
Basic Information about Regulated Drinking Water Contaminants
You are here: ~ .. Drinking Water It prinking Water Contaminants "Basic Information about Reauleted Drinking Water Contaminants" Basic Information about Disinfection
Byproducts in Drinking Water: Total Trihalomethanes. Haloacetic Acids. Bromate, and Chlorite
Basic Information about Disinfection Byproducts in Drinking Water: Total
Trihalomethanes, Haloacetic Acids, Bromate, and Chlorite
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To protect drinking water from disease-causing organisms, or pathogens, water suppliers often add a disinfectant, such as chlorine, to drinking water. However, disinfection
practices can be complicated because ceriain microbial pathogens, such as Cryplosporidium, are highly resistant to traditional disinfection practices. Also, disinfectants
themselves can react with naturally-occurring materials in the water to form byproducts, which may pose health risks.
A major challenge for water suppliers is how to conical and limit the risks from pathogens and disinfection byproducts. It is important to provide protection from pathogens while
simultaneously minimizing health risks to the population from disinfection byproducts. For more information, see fact sheets on Pathogens and Indicators and Disinfectants.
Wat dlsm!ecllon byproduct. does EPA regulate, how are Ihey [OlIDed aod what are Iheir health effects In drinking Vlster at levels above Ihe maximum conlaminant leyel?
1M1al are EPA's dd!\~;"Q waler regulalloas for dlslnfeelion IIvproducts?
How wi!! I know if disinfection bvproducts are In my drinking water?
How will disinfection byproducts be removed from my drinking water?
How do I learn more about my drinking water?
What disinfection byproducts does EPA regulate, how are they formed, and what are their health effects in drinking wator at levels above the maximum
contaminant level?
Disinfection Byproduct (Chemical Abstract
Service Registry Number)
Total Trihalomethanes
Bromodichforomethane (75-27-4)
Bromofonn (75-25-2)
Dibromochloromethane (124-48-1)
Chloroform (67-66-3)
Haloacetic acids:
Dichloroacelic acid (79-43-6)
Trichloroacetic acid (76-03-9)
Chloroacetic acid (79-11-8)
Bromoacetic acid(79-0B-3)
Dibromoacetic acid (631-64-1)
Bromate (1554145-4)
Chlorite (7758-19-2)
How Is It formod?
Trihalomethanes occur when naturally-occurring
organiC and inorganic materials in the water react
with the diSinfectants, chlorine and chloramine.
Haloacetic acids occur when naturally-occurring
organic and inorganic materials in the water react
with the disinfectants, chlorine and chloramine.
Bromate occurs when bromide in the water reacts
with the disinfectant, ozone.
Health Effects
Some people who drink water containing total trihalomethanes In
excess of the MCl over many years could experience liver, kidney,
or cenlcal nervous system problems and increased risk of cancer.
Some people who drink water containing haloacetic acids in excess
of the MCl over many years may have an increased risk of getting
cancer.
Some people who drink water containing bromate in excess of the
MCl over many years may have an increased risk of getting cancer.
Some infants and young children who drink water containing chlorite
in excess of the MCl could experience nervous system effects.
Chlorite occurs when chlorine dioxide breaks down, Similar effects may occur in fetuses of pregnant women who drink
water containing chlorite in excess of the MCL. Some people may
experience anemia.
This health effects language is not intended to catalog all possible health effects for disinfection byproducts. Rather, it is intended to inform consumers of some of the possible
health effects associated with disinfection byproducts in drinking water when the rule was finalized.
What are EPA's drinking water regulations for disinfection byproducts?
In 1974, Congress passed the Safe Drinking Water Act. This law requires EPA to determine the level of contaminants in drinking water at which no adverse health effects are
likely to occur. These non-enforceable health goals, based solely on possible health risks and exposure over a lifetime, with an adequate margin of safety, are called maximum
contaminant level goals (MClG). Contaminants are any physical, chemical, biological or radiological substances or matter in water. EPA sets MClGs based on the best
available science to prevent potential health problems.
Based on the MClG, EPA sets an enforceable regulation called a maximum contaminant level (MCl). MCls are set as close to the health goals as possible, considering cost,
benefits and the ability of public water systems to detect and remove contaminants using suitable trealment technologies. MCls for disinfection byproducts are set at the
following levels:
http://water .epa.govl drink! contaminants/basicinformationl disinfectionbyproducts.cfm 10115/2010
tlaSlC lllIOnnanOn aDom UlSmleCtlOn tlyproaucts III unnKmg water: lotal lnnalOmetnan ... J:'age L or j
Disinfection Byproduct MCl
Total Trihalomethanes
Bromodichloromelhane Zero
Bromoform Zero 0.080 mgll or 80 ppb
Dibromochloromethane 0.06 mgll or 60 ppb (Sum of the concentraUons of all five trihalomethanes) as an annual average
Chloroform 0.07 mgll or 70 ppb
Haloacetic acids
Dichloroace!ic acid Zero
Trichloroace6c acid 0.02 mg/l or 20 ppb
Monochloroacetic acid 0.07 mgll or 70 ppb 0.060 mg/l or 60 ppb
(Sum of the concentraUons of all five haloacetic acids) as an annual average
Bromoacelic acid Regulated with this group but has no MClG
Dibromoace6c acid Regulated with this group but has no MClG
Bromate Zero 0.010 milligrams per liter (mgll) or 10 parts per billion (ppb) as an annual average
Chlorite 0.80 mg/l or 800 ppb 1.0 mg/l or 1 part per million (ppm)
MCls are set as close to the health goals as possible. considering cost, benefits and the ability of public water systems to detect and remove contaminants using suitable
treatment technologies. States may set more stringent drinking water MClGs and MCls for disinfection byproducts than EPA.
The following drinking water regulations apply to disinfectants and disinfection byproducts:
Stage 1 Dtslnfectanls and Dlsinfecllon Bvptoducls Rule <stage 1 DBPI (December 16, 1998)
The Stage 1 Disinfectants and Disinfection Byproducts Rule reduces exposure to disinfection byproducts for customers of community water systems and non-Lransient
non-community systems, including those serving fewer than 10,000 people, that add a disinfectant to the drinking water during any part of the treatment process.
Stage 2 Disinfectants and Disinfection BvproducLs Rule (Stage 2 DB PI (December 15, 2005)
Stage 2 DBP rule builds upon eartier rules that addressed disinfection byproducts to improve your drinking water quaLity and provide additional public health protecUon
from disinfection byproducts.
The Safe Drinking Water Act reqUires EPA to periodically review the national primary drinking water regulation for each contaminant and revise the regulation, if appropriate,
based on new scientific data. EPA will include the Disinfectants and Disinfection Byproducts rules in a future review cycle .
• More info/IDe!lon on Ihe Six Year Reylew of Drinking Waler Standards
How will I know if disinfection byproducts are in my drinking water?
When routine monitoring indicates that disinfection byproduct levels are above the MCl, your water supplier must take steps to reduce the amount of disinfection byproductsso
that they are below that level. Water suppliers must notify their customers as soon as practicaL, but no Later than 30 days after the system learns of the violation. Additional
actions, such as providing alternative drinking water supplies, may be required to prevent serious risks to public health .
• See EPA's public notificatiop requirements for public water systems.
How will disinfection byproducts be removed from my drinking water?
Water systems that use surface water or ground water under the direct influence of surface water and use conventional filtration treatment are required to remove specified
percentages of organic materials that may react with disinfectants to form disinfection byproducts, prior to disinfection. Other control strategies include modification of disinfection
practices in a manner that still provides adequate protection against pathogens.
How do I learn more about my drinking water?
EPA strongly encourages people to learn more about their drinking water, and to support local efforts to protect the supply of safe drinking water and upgrade the community
water system. Your water bill or telephone book's government listings are a good statting point for local information.
Contact your water utility. EPA requires all community water systems to prepare and deliver an annual consumer confidence report (CCR) (sometimes called a water quality
report) for their customers by July 1 of each year. If your water provider is not a community water system, or if you have a private water supply, request a copy from a nearby
community water system.
The CCR summatlles InformatLon regarding $ourees used (I.e:" river}. lakes resarvolrs or aquirers! dBlec!el1 conl~minan!s. compliance and eduoal!onal information.
Some water suppliers have posted their annual reports on EPA's Web site.
Other EPA Web sites
Find an answer or ask a question about drinking water contaminants on EPA's Question and Answer Web site or call EPA's Safe Drinking Water Hotline at (800) 426-
4791
EPA's Microbials and Disinfection Byproducts Web site
Stage 2 Disipfectant/Djsinfection Byproducts Rule
Staqe 1 DisinfectantiDisinfection Byproducts Rule
http://water.epa.gov/drink! contaminantslbasicinfonnationl disinfectionbyproducts.cfm 10115/2010
naSlC mrormauon aoom Vlsmrecuon nyproauC{s m vnnKlng water: 10tal 1 nnalOmeman... ragt:"' U1 "'
EPA's Enyjrofacts ICR Web sile http:ftwater.epa.gov/drinklcontaminantslbasicinformationldisintectionbyproducts.cfm
Dlsjnfection Byproduct Information
• DisInfection Byproducts' A Reference Resource
• Disinfection Byprodycts Health Effects
EPA's Gyjdance Manyal AHemalive piajnfectanls and Oxjdants PDE
• EPA's inteoraled Risk Information System
EPA History of Drinking Water Treatment PDE
EPA Drinking Water Treatment fact Sheet PPE
Other Federal Departments and Agencies
Bromate
• Cp,nW~'fgr Disease & Preventlpn Control's Mallgnsl InstJtule (or OgilJpallgnll1 Safely and Heallh Intemal/oMI Chemical Safety Card fot Sodium Bromal'!
• Chlorite
• Agency for Toxic Substances and Disease Registry ToxEAOs Chlorine Dioxide and Chlorite
• Agency (or Toxic Sub~lanCl!s and Disease Regislry. TO)!\CQ!og!cal prome. Chlolioe pio)(1de ansi Chlqrite
Last updated on Monday, June 14, 2010.
http://water.epa.gov/drink/contaminants/basicinformationJdisinfectionbyproducts.cfin 10/15/2010
1 flnalOmetnanes ~ 1 tiM) III OflllKIllg water 1JISlllIeCtlOn tsy rrooucts / 1 t:UVl'S
Disinfection By-Products
Trihalomethanes
t'ag~ 1 U1 '+
Trihalomethanes (THM) are a group of four chemicals that are formed along with other disinfection by
products when chlorine or other disinfectants used to control microbial contaminants in drinking water
react with naturally occurring organic and inorganic matter in water. The trihalomethanes are
chloroform, bromodichloromethane, dibromochloromethane, and bromoform. EPA has published the
Stage 1 Disinfectants and Disinfection Bvproducts Rule to regulate total trihalomethanes (TTHM) at a
maximum allowable annual average level of 80 parts per billion.
The four trihalomethanes (THM's) listed below:
Trichloromethane I CHC13 I (chloroform)
I Dibromochloromethane IICHClBr2 1
I Bromodichloromethane IICHCl2Br I
Tribromomethane I CHBr3 I (bromoform)
are all by-products of chlorination. They are Cancer Group B carcinogens (shown to cause cancer in
laboratory animals). Trichloromethane (chloroform) is by far the most common in most water systems.
Dibromochloromethane is the most serious cancer risk, (0.6 ug/l to cause a 10-6 cancer risk increase)
followed in order by Bromoform (4 ug/l), and Chloroform (6 ug/l). Current regulations limit the
concentration of these 4 chemicals added together (total trihalomethane or TTHM levels) to 100 ug/l.
Treatment
THM levels tend to increase with pH, temperature, time, and the level of "precursors" present.
Precursors are organic material which reacts with chlorine to form THM's. One way to decrease THM's
is to eliminate or reduce chlorination before the filters and to reduce precursors.. There are more
http://www.water-research.netltrihalomethanes.htm 10/15/2010
1 nhalomethanes {I HM) III ClnnKmg water UlslntectIon tsy YrOaUCIS I 111M S rag\;; k VI '+
precursors present before filtration, so we want to reduce or eliminate the time chlorine is in contact with
this water. If some oxidation before filtration is required, an alternative disinfectant like potassium
permanganate or peroxide could be considered. Note that this may not be an option if prechlorination is
necessary to achieve required CT values.
The EPA has indicated that the best available technology for THM control at treatment plants is removal
of precursors through "enhanced coagulation". Enhanced coagulation refers to the process of optimizing
the filtration process to maximize removal of precursors. Removal is improved by decreasing pH (to
levels as low as 4 or 5), increasing the feed rate of coagulants, and possibly using ferric coagulants
instead of alum.
For point of use systems at homes, activated carbon filters are the most effective treatment. Reverse
osmosis units will also eliminate trihalomethanes.
Upcoming Regulations
The EPA is considering extensive revisions to the regulations covering disinfection by-products
(DBP's). The limit for TTHM's would be lowered to 80 ug/l, and three additional categories ofDBP's .
This standard will replace the current standard of a maximum allowable annual average level of 100
parts per billion in December 2001 for large surface water public water systems. The standard will
become effective for the first time in December 2003 for small surface water and all ground water
systems
Haloacetic acids (monobromoacetic acid, dibromoacetic acid, monochloroacetic acid, dichloroacetic
acid, and trichloroacetic acid) are bypro ducts of chlorination similar to THM's. An MCL for total
haloacetic acids of 60 ug/l is expected. Excessive levels can cause nervous system and liver effects.
Chlorite is to be regulated with an MCL set at 1 mg/I. Excessive levels can cause hemolytic anemia.
Bromate, the other newly regulated DBP, is a concern only for systems using ozone. An MCL of 10
ug/l is expected. Excessive levels causes gastrointestinal, kidney, and hearing effects.
Stage 1 Disinfectants and Disinfection Byproducts Rule
More Comprehensive Information on Trihalomethanes
University of Florida
http://www.agen.ufl.edu/-wq/thm/
Canadian Website
http://www.watermill.com.aulchlorine.htm
Water Quality Help Guides
Glossarv of Water Terminology
Note: ug/l is used as an abbreviation for micrograms/liter or parts per billion.
Note: THM's are not a major concern for treating groundwater wells with low organic matter content.
THM's form through the partial oxidation of organic material, therefore it is a more important concern to
http://www.water-research.net/trihalomethanes.htm 10/15/2010