DRC-2010-003391 - 0901a0688018eec1

RC-2nU;-00339 l
DENISO
MINES
May 28, 2010
Denison Mines (USA) Corp.
105017th Street, Suite 950
Denver, CO 80265
USA
Tel: [phone]
Fax: [phone]
www.denisonmines.com
VIA FEDERAL EXPRESS
Dane L. Finerfrock, Executive Secretary
Utah Radiation Control Board
Utah Department of Environmental Quality
168 North 1950 West
P.O. Box 144810
Sait Lake City, UT 84114-4810
Dear Mr. Finerfrock:
Re: State of Utah Ground Water Discharge Permit No. UGW370004 White Mesa Uranium IVIill -
Background Report for IUIW-20 and MW-22
Pursuant to Part I.E.2 of State of Utah Ground Water Discharge Permit No. UGW370004, please find enclosed
two copies of the report: Background Groundwater Quality Report for Monitoring Wells MW-20 and MW-22
For Denison Mines (USA) Corp. 's White Mesa Mill Site, San Juan County, Utah.
Please contact me if you have any questions regarding this report, or if we can provide you with any further
information.
Yours truly.
avid C. Frydenlund
Vice President Regulatory Affairs and Counsel
cc: Ron F. Hochstein
Harold R. Roberts
Jo Ann S. Tischler
David E. Turk
Daniel W. Erskine, INTERA Inc.

Background Groundwater Quality Report for Wells MW-20 and
MW-22 for Denison Mines (USA) Corp.’s White Mesa Mill Site,
San Juan County, Utah

Prepared for:
Denison Mines (USA) Corp.
Independence Plaza, Suite 950
1050 Seventeenth Street
Denver, CO 80265

Prepared by:

INTERA, Inc.
6000 Uptown Boulevard, Suite 220
Albuquerque, New Mexico 87110

June 1, 2010
Background Groundwater Quality Report for MW-20 and MW-22 Denison Mines (USA) Corp.’s
White Mesa Uranium Mill, San Juan County, Utah
June 1, 2010 Page i
TABLE OF CONTENTS
1.0 INTRODUCTION ................................................................................................................ 1 
2.0 DATA PREPARATION AND STATISTICAL ANALYSIS OF GROUNDWATER
QUALITY DATA ................................................................................................................ 2 
3.0 RELATIONSHIP TO TAILINGS CELLS .......................................................................... 4 
4.0 GROUNDWATER FLOW PARAMETERS AND CHARACTERISTICS ........................ 5 
5.0 CONCLUSIONS .................................................................................................................. 6 
6.0 REFERENCES ..................................................................................................................... 7 
Background Groundwater Quality Report for MW-20 and MW-22 Denison Mines (USA) Corp.’s
White Mesa Uranium Mill, San Juan County, Utah
June 1, 2010 Page ii
LIST OF TABLES
Table 1 MW-20 and MW-22: Monitoring Parameters and Groundwater Quality
Standards
Table 2a Descriptive Summary Statistics for Constituents in MW-20 and MW-22
with Greater than 50 percent Detects
Table 2b Descriptive Summary Statistics for Constituents in MW-20 and MW-22
with Less than 50 percent Detects
Table 3 Geometric Mean and Standard Deviation of Normally or Log-Normally
Distributed Data
Table 4 Laboratory Analytical Methods
Table 5 Comparison for Calculated and Measured TDS for Samples with
Complete Major Ion Analysis
Table 6 Charge Balance of Major Cations and Anions
Table 7 Relative Percent Difference Between Primary and Duplicate Samples
Table 8 Summary of Flow Sheet GWCL Calculations Based on UDEQ
Approved Flow Sheet
Table 9 Well Construction Parameters

LIST OF FIGURES
Figure 1 Ground Water Data Preparation and Statistical Process Flow for
Calculating Ground Water Compliance Limits

LIST OF APPENDICES
Appendix A Box Plots
Appendix B Linear Regression Plots: Substituting Half the MDL for Non-detected Values
(Regression Plots for Wells and Constituents with 15-50% Non-detects are
Considered Exploratory Statistics)
Appendix C Probability Plots: Substituting Half the MDL for Non-detected Values
Appendix D Histograms: Exploratory Statistics Substituting Half the MDL for
Non-detected Values
Appendix E Data That Have Been Removed or Modified Prior to Statistical Analyses
Appendix F Statistica© Input and Output Files (Electronic Only)
Appendix G Monitoring Well Hydraulic Tests Report

Background Groundwater Quality Report for MW-20 and MW-22 Denison Mines (USA) Corp.’s
White Mesa Uranium Mill, San Juan County, Utah
June 1, 2010 Page iii
LIST OF ACRONYMS

DUSA Denison Mines (USA) Corp.

EPA United States Environmental Protection Agency

µg/L micrograms per liter

Mill White Mesa Uranium Mill

mg/L milligrams per liter

GWCL Ground Water Compliance Limit

GWDP, Permit Ground Water Discharge Permit (State of Utah Division of Water Quality
Department of Environmental Quality Utah Water Quality Board. Ground
Water Discharge Permit No. UGW370004 issued January 20, 2010)

GWQS Ground Water Quality Standard

MW monitoring well

POC point of compliance

UAC Utah Administrative Code

Background Groundwater Quality Report for MW-20 and MW-22 Denison Mines (USA) Corp.’s
White Mesa Uranium Mill, San Juan County, Utah
June 1, 2010 Page 1

1.0 INTRODUCTION
This Report on background groundwater quality for wells (MWs) MW-20 and MW-22 at
Denison Mines (USA) Corp.’s (DUSA’s) White Mesa Uranium Mill (Mill) was prepared to meet
the requirements stated in Part I.E.2 of the Mill’s State of Utah Groundwater Discharge Permit
(GWDP) No. UGW370004 issued on January 20, 2010 (as updated by the draft amendments to
the GWDP associated with the approval of Cell 4B), as follows:
After completion of eight consecutive quarters of groundwater sampling and analysis of MW-20
and MW-22, the Permittee shall submit a Background Report that will include:
1), Data preparation and statistical analysis of groundwater quality data, including but not
limited to: evaluation of data characteristics and internal data consistency, treatment of non-
detectable values, and statistical method used. These statistics shall be calculated using the
Decision Tree/Flowchart used for the previous Background Reports that was conditionally
approved by the DRC on August 24, 2007.
2) Aquifer test results to determine local hydraulic conductivity and other aquifer properties at
wells MW-20 and MW-22.
3) Average linear groundwater velocity calculated for MW-20 and MW-22, based on well
specific hydraulic conductivity, hydraulic gradient, and effective aquifer porosity.
Part I.E.2 of the GWDP also provides that after the review of this report the Co-Executive
Secretary of the Utah Water Quality Board will evaluate if wells MW-20 and MW-22 should be
added as point of compliance (POC) monitoring wells.
Data from MW-20 and MW-22 were analyzed in the pre-operational and regional background
addendum (INTERA 2007a); however there was not a complete data set at the time. Although
wells MW-20 and MW-22 were installed in 1994, they were not sampled regularly until the
second quarter of 2008. Part I.E.2 of the January 2010 GWDP requires that there be eight
consecutive quarters of data prior to analyses. The eighth full round of sampling was completed
during the first quarter of 2010. Those eight rounds of sample results form the basis of this
report.
Background Groundwater Quality Report for MW-20 and MW-22 Denison Mines (USA) Corp.’s
White Mesa Uranium Mill, San Juan County, Utah
June 1, 2010 Page 2

2.0 DATA PREPARATION AND STATISTICAL ANALYSIS OF GROUNDWATER
QUALITY DATA
In evaluating the data from MW-20 and MW-22, we have used the same approach that was used
in the Revised Addendum Background Groundwater Quality Report: New Wells (the New Wells
Background Report) (INTERA, 2008). See that document for a detailed discussion of methods
used for the quality assurance evaluation of new data and data validation. The Revised
Background Groundwater Quality Report: Existing Wells (the Existing Wells Background
Report) (INTERA 2007b) contains a summary of historical operations and a discussion of the
geology and hydrology of the site. The New Wells Background Report (INTERA 2008)
summarized methods used in a flow sheet (the “Flow Sheet”) for the statistical analysis and the
determination of the Ground Water Compliance Limits (GWCLs) for each constituent in each
well that is presented as Figure 1 of this report. The “Flow Sheet GWCLs” determined by the
Flow Sheet are considered the background groundwater quality values and will be used for
comparison purposes, not compliance purposes, as will be discussed further in Section 5.0.
Monitoring results from groundwater in MW-20 and MW-22 consist of over 600 data entries.
After performing a quality assurance evaluation and data validation of the new data in
accordance with the requirements of Part I.E.2 of the GWDP and following the methods outlined
in the Flow Sheet, a dataset consisting of useable groundwater monitoring data from these wells
was developed. Extreme identification and removal took place prior to any statistical analysis
(Appendix A).
From that dataset, a Flow Sheet GWCL was calculated for each constituent in each well in
accordance with the Flow Sheet (Figure 1). As required by the Flow Sheet, the manner of
calculating the Flow Sheet GWCL varied depending on the data set for each constituent in each
well. Part I.B of the GWDP originally contemplated (see for example the March 17, 2008
version of the GWDP) that background groundwater quality will be determined on a well-by-
well basis as defined by the mean plus two standard deviations concentration. However, as
discussed in more detail in Sections 6.0 and 13.0 of the Existing Wells Background Report
(INTERA, 2007b), calculating the Flow Sheet GWCL as the mean plus two standard deviations
is only appropriate for normally or log-normally distributed constituents, where the number of
non-detects is 50 percent or less. Therefore, in accordance with United States Environmental
Protection Agency (EPA) Guidance (1992), as set out on the Flow Sheet, the data set was
divided into the following categories:
Background Groundwater Quality Report for MW-20 and MW-22 Denison Mines (USA) Corp.’s
White Mesa Uranium Mill, San Juan County, Utah
June 1, 2010 Page 3

 Normally or log-normally distributed, with 0-15 percent non-detects. For those
constituents, the arithmetic mean and standard deviation have been calculated and Flow
Sheet GWCL calculated as the mean plus two standard deviations.
 Normally or log-normally distributed, with greater than 15 but less than or equal to
50 percent non-detects. For those constituents, the mean and standard deviation have
been estimated using Cohen’s or Aitchison’s method, and the Flow Sheet GWCLs were
calculated as the Cohen or Aitchison mean plus two Cohen or Aitchison standard
deviations.
 All constituents having greater than 50 but less than or equal to 90 percent non-detects or
that are non-parametrically distributed. In these cases, the Flow Sheet GWCL has been
calculated as the greater of: a) the highest historical value for the constituent (the non-
parametric method suggested in those circumstances by EPA Guidance [1992]), and b)
the fractional approach under the Utah Administrative Code (UAC) R317-6-4.5(B)(2) or
4.6(B)(2) which is the basis for the original GWCLs as stated in the March 17, 2008
GWDP.
 All constituents having greater than 90 percent non-detects. For those constituents, the
Flow Sheet GWCL is calculated as the greater of: a) the Poisson limit (as suggested in
EPA Guidance [1992]), and b) the fractional approach under UAC R317-6-4.5(B)(2) or
4.6(B)(2).
Constituents that were 100 percent non-detects for any well were assigned the fractional
approach GWCL under UAC R317-6-4.5 (B) (2) or 4.6 (B) (2). Tests for normality were
performed (see Section 5.2 of the Existing Wells Background Report (INTERA, 2007b)), and the
data was divided into the foregoing categories (see Section 6.1 of the Existing Wells Background
Report (INTERA, 2007b)). The results of this analysis and the Flow Sheet GWCLs for each
constituent in each well are summarized in Table 8. Exploratory descriptive statistics on all
available data from the MW-20 and MW-22 are presented in Tables 2a and 2b. The geometric
mean and standard deviation for all normal or log-normally distributed data sets with less than 50
percent non-detects are in Table 3.
Linear regression and Mann-Kendall trend analyses were performed on each constituent in each
well, as appropriate. For constituents that are normally or log-normally distributed with
15 percent or fewer non-detects, linear regression analysis alone was performed. For constituents
that are normally or log-normally distributed with greater than 15 but less than or equal to
Background Groundwater Quality Report for MW-20 and MW-22 Denison Mines (USA) Corp.’s
White Mesa Uranium Mill, San Juan County, Utah
June 1, 2010 Page 4

50 percent non-detects, Mann-Kendall analysis as well as linear regression were performed. For
all other constituents, Mann-Kendall analysis was performed.
Data plots for all constituents are set out in Appendix B. Linear regression results for those
constituents with at least eight valid data points are also set out on those data plots, even for
those constituents where Mann-Kendall analysis alone is justified. In those cases, the linear
regression analysis is provided as a visual aid in viewing the data and should be considered as
“exploratory statistics” only. Rising or decreasing trends identified by either linear regression
(for normally or log-normally distributed constituents having 50 percent or fewer non-detects) or
Mann-Kendall (for all non-parametric constituents and all constituents with greater than 15
percent non-detects) that are statistically significant are identified in red in Appendix B. All other
trends are not statistically significant. See Sections 4.0, 5.0, and 6.0 of the Existing Wells
Background Report (INTERA 2007b) for a full discussion of the statistical approaches used in
this Report.
Due to the removal of extremes and internally inconsistent data from the data set in accordance
with the Flow Sheet, fewer than eight data points are available for a number of constituents as
indicated on Tables 2a, 2b and Table 8. In accordance with the Flow Sheet, regression analysis,
probability plots, and histograms are not provided for those constituents.
3.0 RELATIONSHIP TO TAILINGS CELLS
Based on the following observations, concentrations of constituents in groundwater samples
from MW-20 and MW-22 have not been influenced by any potential seepage from the tailings
cells. These monitor wells are far downgradient from the nearest tailings impoundment. MW-20
is three quarters of a mile away and MW-22 is a mile away and cross gradient from the
downgradient edge of Cell 4A making it extremely unlikely that groundwater quality in samples
from these wells is influenced by any potential tailings seepage. This is particularly so since
other wells located closer to the tailings cells have been determined not to have been impacted by
the cells. Hurst and Solomon (2008) included MW-22 in their study and stated “Tritium in MW-
22 deep indicates a small amount of recharge taking place near the well.” They also noted that
groundwater samples from MW-22 have elevated uranium concentrations, but concluded that
these concentrations could not be due to any potential leakage from tailing cells (or wildlife
ponds) because they do not bear an evaporated stable isotope signal. Finally, they suggested,
based on several lines of evidence, that trace metal concentrations in groundwater samples from
MW-22 and several other monitor wells studied represent natural background conditions.
Background Groundwater Quality Report for MW-20 and MW-22 Denison Mines (USA) Corp.’s
White Mesa Uranium Mill, San Juan County, Utah
June 1, 2010 Page 5

An analysis of data from sampling of MW-20 and MW-22 confirms the high variability of all
constituents across the site and the region described in previous reports. There is no consistent
spatial relationship between the primary indicator parameters and the location of the tailings
impoundments. For some constituents the highest observed values are upgradient of the Mill site.
For others the highest observed values are far downgradient of the site. For still others the
highest concentrations are both upgradient and far downgradient of the site. There are rising and
decreasing trends in constituents both upgradient and downgradient of the site. It is therefore not
possible to conclude that higher concentrations of constituents or increasing trends in
constituents downgradient of the Mill site necessarily imply contamination from site activities.
The variability in data for MW-20 and MW-22 is consistent with and reinforces our conclusions
drawn from the existing wells and regional background.
4.0 GROUNDWATER FLOW PARAMETERS AND CHARACTERISTICS
MW-20 and MW-22 are regional monitoring wells that were installed in 1994 by a previous Mill
operator in locations that are far downgradient of the tailings cells. Table 9 summarizes well
construction parameters for MW-20 and MW-22.
Hydraulic testing of monitoring wells MW-20 and MW-22 was conducted in 2002 to estimate
perched zone hydraulic properties in the vicinity of each well. A letter report describing the
results of these tests (HGC, 2010) is included in this Report as Appendix G. Hydraulic test data
were collected and analyzed by several different methods to estimate hydraulic conductivity.
Table 1 of Appendix G summarizes aquifer test results, including local hydraulic conductivity
and other aquifer properties at wells MW-20 and MW-22. All estimated hydraulic conductivity
values for these wells are in the range of 10-6 cm/second.
The average linear groundwater velocity calculated for MW-20 and MW-22, based on the
geometric mean of well-specific estimates of hydraulic conductivities, hydraulic gradient, and
effective aquifer porosity, is presented in Table 2 of Appendix G. The calculated average linear
groundwater velocities for MW-20 and MW-22 are 0.33 feet per year (ft/yr) and 0.43 ft/yr,
respectively. These average linear velocity estimates indicate that groundwater is moving very
slowly in this far downgradient area. Further, there are some indications that groundwater is
dissipating in the vicinity of MW-20. Site personnel report that before sampling on May 5, 2010,
there was 2.54 feet of water in the well. The well was pumped dry during sampling. Water
levels were measured 14 days later, on May 19th and found only 0.32 feet of water in the well.
Measurements on May 25th found only 0.72 feet of groundwater 20 days after sampling,
Background Groundwater Quality Report for MW-20 and MW-22 Denison Mines (USA) Corp.’s
White Mesa Uranium Mill, San Juan County, Utah
June 1, 2010 Page 6

suggesting that this far downgradient area may be near the edge of saturation in the perched
aquifer.
5.0 CONCLUSIONS
MW-20 and MW-22 have not been influenced by any potential seepage from the tailings cells.
These monitor wells are far downgradient from the nearest tailings impoundment, making it
extremely unlikely that groundwater quality in samples from these wells is influenced by
potential tailings seepage. Tritium in MW-22 deep indicates a small amount of recharge taking
place near the well, and stable isotope signatures indicate that the source of groundwater could
not be due to any potential leakage from tailing cells or the wildlife ponds. Therefore, Hurst and
Solomon (2008) concluded, based on several lines of evidence, that trace metal concentrations in
groundwater samples from MW-22 and several other monitor wells studied represent natural
background conditions.
MW-22 has concentrations of several constituents that are not similar to any other monitor well
at the Site, suggesting that concentrations in groundwater samples from this well are not
representative of groundwater flowing beneath the tailings cells. The water in this well likely
has a source that is separate from the groundwater flowing beneath the tailings cell. Any
changes in groundwater quality over time in MW-22 would not reflect changes resulting from
potential tailings seepage impacts. Therefore, INTERA does not recommend that this well be
included in the GWDP as a point of compliance (POC) well.
MW-20 is located more than 4,000 feet downgradient of the nearest tailings cell. The average
linear groundwater velocity calculated for this well is less than one foot per year, indicating that
groundwater is moving very slowly in the vicinity of this well, and there are indications that it
may be going dry. Two far-downgradient monitor wells already exist between MW-20 and the
nearest tailings cell. Monitor wells MW-3 and MW-3A contain concentrations of constituents
that are similar to those found in groundwater samples from MW-20. Any groundwater impacts
from potential tailings seepage would appear in those wells long before they would appear in
MW-20. MW-20 does not add additional value to the tailings cell monitoring network.
Therefore, INTERA does not recommend that this well be included in the GWDP as a POC well.
Background Groundwater Quality Report for MW-20 and MW-22 Denison Mines (USA) Corp.’s
White Mesa Uranium Mill, San Juan County, Utah
June 1, 2010 Page 7

6.0 REFERENCES
EPA (U.S. Environmental Protection Agency), 1992. Statistical analysis of ground-water
monitoring data at RCRA facilities: Addendum to Interim final guidance, Office of Solid
Waste, Permits and State Programs Division, U.S. Environmental Protection Agency, 401
M Street, S.W. Washington, D.C. 20460 (EPA Guidance [1992])
Hurst, T.G., and D.K. Solomon. 2008. Summary of work completed, data results, interpretations
and recommendations for the July 2007 sampling event at the Denison Mines, USA,
White Mesa Uranium Mill. University of Utah Department of Geology and Geophysics.
May 2008.
Hydro Geo Chem, 2002. Hydraulic Testing at the White Mesa Uranium Mill Near Blanding,
Utah During July 2002.
Hydro Geo Chem, 2010. Letter to Dave Frydenlund regarding Hydraulic Testing of MW-20 and
MW-21. May 25, 2010
INTERA, Inc., 2007a. Revised Addendum: Evaluation of Pre-Operational and Regional
Background Data, Background Groundwater Quality Report: Existing Wells for Denison
Mines (USA) Corp.’s White Mesa Mill Site, San Juan County, Utah. November 16, 2007.
INTERA, Inc., 2007b. Revised Background Groundwater Quality Report: Existing Wells for
Denison Mines (USA) Corp.’s White Mesa Mill Site, San Juan County, Utah. October
2007. (Existing Wells Background Report)
INTERA, Inc., 2008. Revised Addendum, Background Groundwater Quality Report: New Wells
for Denison Mines (USA) Corp’s White Mesa Mill Site, San Juan County, Utah. April
30, 2008. (New Wells Background Report)

Figure
Negative Value?
Zero Value?
Truncated Value?
Duplicate Value?
Units Consistant?
Non-detects Exceeding Criteria Specified by URS Memo*
Analysis Internally Consistent?(TDS and Charge Balance Check)
YesNo
No
Yes
No
No
No
Yes
Yes
No
Yes
Yes
Yes
Radionuclide?
Yes
Remove from DatasetDetection Limit and U-Flag Data Qualifier NoNo
Review for Units
Remove from Dataset
If chloride, sulfate, or TDS, Remove from Dataset
Correct Value Confirmed?
Remove from
Dataset
Remove from Dataset
Determine Percentage Non-Detects in Remaining Data
Plot Data Sets as Box Plots to Identify Extreme Values As Specified in Background Report. Extreme Value?
No Remove from
Dataset
Yes
At Least 8 Data Points Remaining?
Defer Analysis Until Eight
Data Points Avalible
0-15 Percent Non-Detects >15-50 Percent Non-Detects >90 Percent Non-Detects
No
Yes
No
Substitute One Half of Detection Limit
Log Transform Data
Use Probability Plots to
Determine if Cohen’s or Aitchison’s Method
Calculate Descriptive Statistics
(Redo Tables In Background Report)
Screen for Trends Using Least Squares Regression.
Calculate GWCL (Mean
+2Sigma)
Calculate Descriptive Statistics
(Redo Tables In Background Report)
Yes
No
Calculate GWCL (Mean +2Sigma)
Calculate GWCL Using Greater of Fraction Approach under UAC R317-6-4-4.5(B)(2) or 4.6(B)(2) or Poisson Prediction Limit
Yes
No
>50-90 Percent Non-Detects
Calculate Upper Prediction Limit (Highest Historical Value)
Calculate GWCL Using Greater of Fraction Approach under UAC R317-6-4-4.5(B)(2) or 4.6(B)(2) or the Highest Historic Value
Estimate Mean and Standard
Deviation
Screen for Trends Using Mann-Kendall Screen for Trends Using Mann-Kendall
Yes
Use Non-Parametric StatisticsNo
Screen for Trends Using Least Squares Regression
Tuesday, June 1, 2010
Groundwater Data Preparation and Statistical Process Flow for
Calculating Groundwater Protection Standards, White Mesa Mill Site, San Juan County, Utah
Upward Trend?Upward Trend?
No No
Yes
Consider Modified Approch to GWCL
Upward Trend?Upward Trend?
No No
Yes
Consider Modified Approch to GWCL
Log Transform Data
Log-Normal or Normal?Shapiro WilkProbability PlotsHistograms
Log-Normal or Normal?Shapiro WilkProbability PlotsHistograms
*A non-detect considered “insensitive” will be the maximum reporting limit in a dataset and will exceed other non-detects by, for example, an order of magnitude (e.g., <10 versus <1.0 µg/L). In some cases, insensitive non-detects may also exceed detectable values in a
dataset (e.g., <10 versus 3.5 µg/L).
Figure 1Groundwater Data Preparation and Statistical Process Flow for Calculating Ground Water Compliance Limits, White Mesa Mill Site, San Juan County, Utah.
Database of Wells and Analytes Listed in the Statement of Basis

Tables
Table 1
Monitoring Wells MW-20 and MW-22: Monitoring Parameters and Groundwater Quality
Standards
Nutrient Ammonia, N mg/L 25
Nutrient Nitrate+Nitrite, N mg/L 10
Metal Arsenic µg/L 50
Metal Beryllium µg/L 4
Metal Cadmium µg/L 5
Metal Chromium µg/L 100
Metal Cobalt µg/L 730
Metal Copper µg/L 1,300
Metal Iron µg/L 11,000
Metal Lead µg/L 15
Metal Manganese µg/L 800
Metal Mercury µg/L 2
Metal Molybdenum µg/L 40
Metal Nickel µg/L 100
Metal Selenium µg/L 50
Metal Silver µg/L 100
Metal Thallium µg/L 2
Metal Tin µg/L 17,000
Metal Uranium µg/L 30
Metal Vanadium µg/L 60
Metal Zinc µg/L 5,000
Radiologic Gross Alpha pCi/L 15
VOC Acetone µg/L 700
VOC Benzene µg/L 5
VOC Methyl Ethyl Ketone µg/L 4,000
VOC Carbon Tetrachloride µg/L 5
VOC Chloroform µg/L 70
VOC Chloromethane µg/L 30
VOC Dichloromethane µg/L 5
VOC Naphthalene µg/L 100
VOC Tetrahydrofuran µg/L 46
VOC Toluene µg/L 1,000
VOC Total Xylenes µg/L 10,000
Other Chloride mg/L TBD
Other Fluoride mg/L 4
Other Field pH pH 6.5 to 8.5
Other Sulfate mg/L TBD
Other TDS mg/L TBD
Notes:
GWQS = Groundwater quality standard
mg/L = Milligrams per liter
pCi/L = Picocuries per liter
VOC = Volatile organic compound
TBD = To be determined (defined as the value of the arithmetic mean
plus two standard deviations or equivalent)
µg/L = Micrograms per liter
TDS = Total dissolved solids
Constituent Units GWQSType
Page 1 of 1
Table 2a
Descriptive Summary Statistics for Constituents in Monitoring Wells MW-20 and MW-22 with Greater than 50% Detects
Type Well Constituent Units Detects N % Detects Mean Geometric Mean Std. Dev. Q25 Median Q75 Min. Conc. Max. Conc. Range Skewness
All MW-22 Beryllium µg/L 8 8 100% 2.6 2.6 0.4 2.4 2.5 2.9 2.3 3.2 0.9 0.9
All MW-22 Cadmium µg/L 8 8 100% 89.9 89.8 4.1 87.5 91.5 92.5 81.8 94.6 12.8 -1.1
All MW-20 Chloride mg/L 8 8 100% 63.8 63.6 5.2 59.5 63 68.5 57 71 14 0.3
All MW-22 Chloride mg/L 8 8 100% 61 60.9 4.2 58 61.5 64 54 67 13 -0.3
All MW-22 Cobalt µg/L 8 8 100% 288.9 288.4 17.4 274.5 292 301 264 312 48 -0.3
All MW-22 Copper µg/L 5 8 62.5% 12.4 12 3.3 10 10.5 14.5 10 19 9 1.3
All MW-20 Fluoride mg/L 8 8 100% 0.3 0.3 0 0.3 0.3 0.3 0.2 0.3 0.1 -0.5
All MW-22 Fluoride mg/L 8 8 100% 3.0 3 0.2 2.9 2.9 3.1 2.8 3.2 0.5 0.7
All MW-20 Gross Alpha minus Rn&U pCi/L 6 8 75% 1.0 0.8 0.6 0.6 0.8 1.4 0.4 2.1 1.7 1.1
All MW-22 Gross Alpha minus Rn&U pCi/L 8 8 100% 3.9 3.8 1.1 3.1 3.3 5.1 2.9 5.5 2.6 0.7
All MW-20 Manganese µg/L 8 8 100% 41.3 37.4 19.4 27 40 51 17 77 60 0.8
All MW-22 Manganese µg/L 8 8 100% 31800 31783 1105 31200 32000 32500 29700 33300 3600 -0.8
All MW-22 Molybdenum µg/L 8 8 100% 454.6 421.5 161.9 332.5 505 577 188 620 432 -1
All MW-22 Nickel µg/L 8 8 100% 136.1 135.9 8.4 133 139 141.5 118 144 26 -1.7
All MW-20 Nitrogen, Ammonia as N mg/L 6 8 75% 0.3 0.2 0.2 0.1 0.3 0.5 0.1 0.7 0.6 0.4
All MW-22 Nitrogen, Ammonia as N mg/L 8 8 100% 0.5 0.4 0.2 0.3 0.6 0.6 0.2 0.7 0.5 -0.6
All MW-20 Nitrogen, Nitrate+Nitrite as N mg/L 8 8 100% 5 4.8 1.2 4.5 5.2 5.8 2.5 6.5 4 -1.1
All MW-22 Nitrogen, Nitrate+Nitrite as N mg/L 8 8 100% 3.5 3.5 0.4 3.4 3.6 3.8 2.7 3.9 1.2 -1.5
All MW-20 Field pH s.u.8 8 100% 7.2 7.2 0.1 7.1 7.2 7.3 7.1 7.4 0.3 1.4
All MW-22 Field pH s.u.8 8 100% 5.8 5.8 0.2 5.7 5.8 6.0 5.5 6.2 0.4 0.5
All MW-22 Selenium µg/L 8 8 100% 11.9 11.8 1.8 10.3 12 12.9 9.8 15.3 5.5 0.6
All MW-20 Sulfate mg/L 8 8 100% 3862.5 3859.4 165.8 3740 3895 3950 3600 4130 530 0
Without Anomolous Value MW-20 Sulfate mg/L 7 7 100% 3824.3 -0.6 135.8 3880 3910 3910 3600 3990 3822.2 3720
All MW-22 Sulfate mg/L 8 8 100% 5337.5 5331.6 271.4 5160 5310 5450 4990 5870 880 1
All MW-20 TDS mg/L 8 8 100% 5598.8 5595.2 209.9 5530 5645 5735 5150 5820 670 -1.5
Without Anomolous Value MW-20 TDS mg/L 7 7 100% 5662.9 -0.1 114.3 5650 5780 5490 5820 5661.9 5570
All MW-22 TDS mg/L 8 8 100% 7537.5 7529.6 365.1 7270 7610 7850 6920 7920 1000 -0.8
With Extremes MW-22 Thallium µg/L 8 8 100% 1.19 1.18 0.15 1.10 1.18 1.23 1.02 1.50 0.48 1.27
Without Extremes MW-22 Thallium µg/L 7 7 100% 1.19 1.36 0.16 1.16 1.23 1.02 1.50 1.18 1.04
All MW-20 Uranium µg/L 8 8 100% 19.7 18.3 8.3 14.6 17 24.8 10.2 34.6 24.4 1
All MW-22 Uranium µg/L 8 8 100% 49 48.9 3 46.9 49.3 51.7 43.6 52.4 8.8 -0.6
All MW-20 Zinc µg/L 8 8 100% 57.8 53.6 24.3 40 46.5 82.5 32 92 60 0.6
All MW-22 Zinc µg/L 8 8 100% 534.4 532.6 47.1 512.5 528.5 564.5 458 606 148 0.1
Notes:
pCi/L = Picocuries per liter
Detects = Number of detections
Q25 = 25th percentile of the sample population
**Mean = Arithmetic mean; For constituents with greater than 15% and less than 50% non-detects, means are determined in a
separate manner in Table 9.
**Std.Dev. = Standard deviation; For constituents with greater than 15% and less than 50% non-detects, the standard deviation
is determined in a separate manner in Table 10.
TDS = Total dissolved solids
Skewness = Measure of skewness of the data distribution; indicates degree of assymetry and direction of the skewness
(values greater than 2 indicate significant skew, with negative values indicating left skew, positive values indicating
ih k )
ug/L = Micrograms per literN = Number of samples
mg/L = Milligrams per liter
Min. Conc. = Minimum concentration
Max. Conc. = Maximum concentration
s.u.= standard units
Type = All - Entire data set. Data set did not contain extremes.Median = 50th percentile of the sample population
With Extremes - Entire data set. Data set did contain extremes. Q75 = 75th percentile of the sample population
Well = Monitoring well location
%Detects = The percent at which a constituent was detected in a given well
Page 1 of 2
Table 2a
Descriptive Summary Statistics for Constituents in Monitoring Wells MW-20 and MW-22 with Greater than 50% Detects
Type Well Constituent Units Detects N % Detects Mean Geometric Mean Std. Dev. Q25 Median Q75 Min. Conc. Max. Conc. Range Skewness
All MW-20 Acetone µg/L 0 8 0.0% 20.0 20.0 0.0 20.0 20.0 20.0 20.0 20.0 0.0 0.0
All MW-22 Acetone µg/L 0 8 0.0% 20.0 20.0 0.0 20.0 20.0 20.0 20.0 20.0 0.0 0.0
All MW-20 Arsenic µg/L 0 8 0.0% 5.0 5.0 0.0 5.0 5.0 5.0 5.0 5.0 0.0 0.0
All MW-22 Arsenic µg/L 0 8 0.0% 5.0 5.0 0.0 5.0 5.0 5.0 5.0 5.0 0.0 0.0
All MW-20 Benzene µg/L 0 8 0.0% 1.0 1.0 0.0 1.0 1.0 1.0 1.0 1.0 0.0 0.0
All MW-22 Benzene µg/L 0 8 0.0% 1.0 1.0 0.0 1.0 1.0 1.0 1.0 1.0 0.0 0.0
All MW-20 Beryllium µg/L 0 8 0.0% 0.5 0.5 0.0 0.5 0.5 0.5 0.5 0.5 0.0 0.0
With Extremes MW-20 Cadmium µg/L 1 8 12.5% 0.6 0.5 0.2 0.5 0.5 0.5 0.5 1.1 0.6 2.8
Without Extremes MW-20 Cadmium µg/L 0 7 0.0% 0.5 0.0 0.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5
All MW-20 Carbon tetrachloride µg/L 0 8 0.0% 1.0 1.0 0.0 1.0 1.0 1.0 1.0 1.0 0.0 0.0
All MW-22 Carbon tetrachloride µg/L 0 8 0.0% 1.0 1.0 0.0 1.0 1.0 1.0 1.0 1.0 0.0 0.0
All MW-20 Chloroform µg/L 0 8 0.0% 1.0 1.0 0.0 1.0 1.0 1.0 1.0 1.0 0.0 0.0
All MW-22 Chloroform µg/L 0 8 0.0% 1.0 1.0 0.0 1.0 1.0 1.0 1.0 1.0 0.0 0.0
All MW-20 Chloromethane µg/L 08 0% 1 1 0 1 1 1 1 1 0 0
All MW-22 Chloromethane µg/L 08 0% 1 1 0 1 1 1 1 1 0 0
All MW-20 Chromium µg/L 0 8 0% 25 25 0 25 25 25 25 25 0 0
All MW-22 Chromium µg/L 0 8 0% 25 25 0 25 25 25 25 25 0 0
All MW-20 Cobalt µg/L 0 8 0% 10 10 0 10 10 10 10 10 0 0
All MW-20 Copper µg/L 0 8 0% 10 10 0 10 10 10 10 10 0 0
All MW-20 Iron µg/L 1 8 12.5% 35.5 34.7 8.3 30 30 42 30 50 20 1.1
All MW-22 Iron µg/L 2 8 25.0% 36.3 35.5 8.1 30 32 43 30 50 20 0.9
All MW-20 Lead µg/L 08 0% 1 1 0 1 1 1 1 1 0 0
All MW-22 Lead µg/L 3 8 37.5% 1 1 0.1 1 1 1.1 1 1 0.2 2.0
All MW-20 Mercury µg/L 0 8 0% 0.5 0.5 0 0.5 0.5 0.5 0.5 0.5 0 0
With Extremes MW-22 Mercury µg/L 1 8 12.5% 0.5 0.5 0 0.5 0.5 0.5 0.5 0.6 0.1 2.8
Without Extremes MW-22 Mercury µg/L 0 7 0% 0.5 0 0 0.5 0.5 0.5 0.5 0.5 0.5 0.5
All MW-20 Methyl ethyl ketone µg/L 0 8 0% 20 20 0 20 20 20 20 20 0 0
All MW-22 Methyl ethyl ketone µg/L 0 8 0% 20 20 0 20 20 20 20 20 0 0
All MW-20 Methylene chloride µg/L 07 0% 1 1 0 1 1 1 1 1 0 0
All MW-22 Methylene chloride µg/L 07 0% 1 1 0 1 1 1 1 1 0 0
With Extremes MW-20 Molybdenum µg/L 1 8 12.5% 10.1 10.1 0.4 10 10 10 10 11 1 2.8
Without Extremes MW-20 Molybdenum µg/L 0 7 0% 10 0 0 10 10 10 10 10 10 10
All MW-20 Naphthalene µg/L 08 0% 1 1 0 1 1 1 1 1 0 0
All MW-22 Naphthalene µg/L 08 0% 1 1 0 1 1 1 1 1 0 0
All MW-20 Nickel µg/L 0 8 0% 20 20 0 20 20 20 20 20 0 0
All MW-20 Selenium µg/L 08 0% 5 5 0 5 5 5 5 5 0 0
All MW-20 Silver µg/L 0 8 0% 10 10 0 10 10 10 10 10 0 0
All MW-22 Silver µg/L 0 8 0% 10 10 0 10 10 10 10 10 0 0
All MW-20 Tetrahydrofuran µg/L 07 0% 2 2 0 2 2 2 2 2 0 0
All MW-22 Tetrahydrofuran µg/L 07 0% 2 2 0 2 2 2 2 2 0 0
%Detects = The percent MW-20 Thallium µg/L 3 8 37.5% 0.6 0.6 0 2 2 2 0.5 1.1 0.6 2.7
Without Extremes MW-20 Thallium µg/L 2 7 28.6% 0.5 1.8 0 0.5 0.5 0.5 0.5 0.6 0.5 0.5
All MW-20 Tin µg/L 0 8 0% 100.0 100.0 0.2 0.5 0.5 0.6 100 100 0 0
All MW-22 Tin µg/L 0 8 0% 100 100 0 100 100 100 100 100 0 0
All MW-20 Toluene µg/L 0 8 0% 1 1 0 100 100 100 1 1 0 0
All MW-22 Toluene µg/L 08 0% 1 1 0 1 1 1 1 1 0 0
All MW-20 Vanadium µg/L 0 8 0% 15 15 0 15 15 15 15 15 0 0
All MW-22 Vanadium µg/L 0 8 0% 15 15 0 15 15 15 15 15 0 0
All MW-20 Xylenes, Total µg/L 08 0% 1 1 0 1 1 1 1 1 0 0
All MW-22 Xylenes, Total µg/L 08 0% 1 1 0 1 1 1 1 1 0 0
Notes:
%Detects = The percent at which a constituent was detected in a given well
Skewness = Measure of skewness of the data distribution; indicates degree of assymetry and direction of the skewness (values
greater than 2 indicate significant skew, with negative values indicating left skew, positive values indicating right skew)
**Mean = Arithmetic mean; For constituents with greater than 15% and less than 50% non-detects,
means are determined in a separate manner in Table 9.
pCi/L = Picocuries per liter
Well = Monitoring well location
Type = All - Entire data set. Data set did not contain extremes. Median = 50th percentile of the sample population
With Extremes - Entire data set. Data set did contain extremes. Q75 = 75th percentile of the sample population
Q25 = 25th percentile of the sample population s.u.= standard units
TDS = Total dissolved solids
Min. Conc. = Minimum concentration
Max. Conc. = Maximum concentration
mg/L = Milligrams per liter
Detects = Number of detections
ug/L = Micrograms per liter
**Std.Dev. = Standard deviation; For constituents with greater than 15% and less than 50% non-detects,
the standard deviation is determined in a separate manner in Table 10.
N = Number of samples
Page 2 of 2
Table 3
Geometric Mean and Standard Deviation of Normally or Log-Normally Distributed Data
Well Constituent GWQS N % Detected
Geometric
Mean
Geometric
Standard
Deviation
MW-22 Beryllium 4 8 100% 2.6 1.1
MW-22 Cadmium 5 8 100% 89.8 1.0
MW-20 Chloride 8 100% 63.6 1.1
MW-22 Chloride 8 100% 60.9 1.1
MW-22 Cobalt 730 8 100% 288 1.1
MW-20 Fluoride 4 8 100% 0.3 1.1
MW-22 Fluoride 4 8 100% 3.0 1.1
MW-20 Gross Alpha minus Rn&U 15 8 75% 0.8 1.8
MW-20 Manganese 800 8 100% 37.4 1.6
MW-22 Manganese 800 8 100% 31783 1.0
MW-20 Nitrogen, Ammonia as N 25 8 75% 0.2 2.8
MW-20 Nitrogen, Nitrate+Nitrite as N 10 8 100% 4.8 1.3
MW-22 Nitrogen, Nitrate+Nitrite as N 10 8 100% 3.5 1.1
MW-20 Field pH 6-9 8 100% 7.2 1.0
MW-22 Field pH 6-9 8 100% 5.8 1.0
MW-22 Selenium 50 8 100% 11.8 1.2
MW-22 Sulfate 8 100% 7530 1.1
MW-22 TDS 8 100% 5332 1.1
MW-20 Uranium 30 8 100% 18.3 1.5
MW-22 Uranium 30 8 100% 48.9 1.1
MW-20 Zinc 5,000 8 100% 53.6 1.5
MW-22 Zinc 5,000 8 100% 532.6 1.1
Notes:
% Detected: The percent at which a constituent was detected in a given well
N= Number of data points
GWQS= Ground Water Quality Standard
% Detected: The percent at which a constituent was detected in a given well
Page 1 of 1
Table 4
Laboratory Analytical Methods
Sample Analysis Method
Chloride A4500-Cl B
Fluoride A4500-F C
Gross Alpha E900.1
Iron and Manganese E200.7
Metals, other than Iron and Manganese E200.8
Nitrogen, Ammonia as N E350.1
Nitrogen, Nitrate + Nitrite as N E353.2
pH A4500-H B
Sulfate A4500-SO4 E
TDS A2540 C
Uranium E200.8
VOCs SW8260B
Page 1 of 1
Table 5
Comparison of Calculated and Measured TDS for Samples with Complete Major Ions
Well Date
CO3+HCO3 as
Alkalinity
(mg/L)
Calcium
(mg/L)
Chloride
(mg/L)
Potassium
(mg/L)
Magnesium
(mg/L)
Sodium
(mg/L)
Sulfate
(mg/L)
Measured
TDS (mg/L)
Calculated
TDS (mg/L)Ratio
MW‐20 6/17/2008 384 395 67 61.9 108 1480 3880 5570 6375.9 114.47%
MW‐20 8/11/2008 386 388 57 50.3 110 1430 3910 5650 6331.3 112.06%
MW‐20 11/12/2008 317 374 64 53.7 103 1420 3720 5690 6051.7 106.36%
MW‐20 2/2/2009 287 361 59 44.8 103 1200 3600 5780 5654.8 97.83%
MW‐20 5/14/2009 280 339 60 45.6 96 1260 3910 5820 5990.6 102.93%
MW‐20 8/31/2009 281 358 62 49.8 99.3 1360 3760 5640 5970.1 105.85%
MW‐20 10/28/2009 256 348 71 49 92.1 1330 3990 5490 6136.1 111.77%
MW‐20 2/11/2010 235 349 70 48 90.8 1370 4130 5150 6292.8 122.19%
MW‐22 6/17/2008 436 483 64 26.2 975 260 5130 7110 7374.2 103.72%
MW‐22 8/11/2008 489 499 58 24.9 1080 259 5870 7620 8279.9 108.66%
MW‐22 11/12/2008 482 484 64 25 1050 262 5520 7900 7887 99.84%
MW‐22 2/2/2009 467 418 54 22.2 965 233 5240 7920 7399.2 93.42%
MW‐22 5/14/2009 480 432 58 23.5 994 258 5380 7800 7625.5 97.76%
MW‐22 8/31/2009 501 454 62 24.5 963 243 5380 7430 7627.5 102.66%
MW‐22 10/27/2009 499 453 67 24 983 249 5190 7600 7465 98.22%
MW‐22 2/8/2010 532 439 61 23.8 942 248 4990 6920 7235.8 104.56%
Notes:
CO3= Carbonate
HCO3= Bicarbonate
TDS= Total Dissolved Solids
Bold values are not internally consistent and have been removed from the dataset prior to statistical analysis.
Ratio= Difference between measured and calculated values
Page 1 of 1
Table 6
Charge Balance of Major Cations and Anions
Well Date
Calcium
(meq/L)
Sodium
(meq/L)
Manganese
(meq/L)
Potassium
(meq/L)
Total
Cation
Charge
(meq/L)
HCO3
(meq/L)
Chloride
(meq/L)
SO4
(meq/L)
Total Anion
Charge
(meq/L)
Percent
Difference
MW‐20 6/17/2008 19.71 64.38 8.89 1.58 94.55 ‐6.29 ‐1.89 ‐80.78 ‐88.97 5.91%
MW‐20 8/11/2008 19.36 62.20 9.05 1.29 91.90 ‐6.33 ‐1.61 ‐81.41 ‐89.34 2.78%
Page 1 of 1
MW 20 8/11/2008 19.36 62.20 9.05 1.29 91.90 6.33 1.61 81.41 89.34 2.78%
MW‐20 11/12/2008 18.66 61.77 8.47 1.37 90.28 ‐5.20 ‐1.81 ‐77.45 ‐84.45 6.45%
MW‐20 2/2/2009 18.01 52.20 8.47 1.15 79.83 ‐4.70 ‐1.66 ‐74.95 ‐81.32 ‐1.87%
MW‐20 5/14/2009 16.92 54.81 7.90 1.17 80.79 ‐4.59 ‐1.69 ‐81.41 ‐87.69 ‐8.54%
MW‐20 8/31/2009 17.86 59.16 8.17 1.27 86.46 ‐4.61 ‐1.75 ‐78.28 ‐84.64 2.11%
MW‐20 10/28/2009 17.37 57.85 7.58 1.25 84.05 ‐4.20 ‐2.00 ‐83.07 ‐89.27 ‐6.22%MW 20 10/28/2009 17.37 57.85 7.58 1.25 84.05 4.20 2.00 83.07 89.27 6.22%
MW‐20 2/11/2010 17.42 59.59 7.47 1.23 85.70 ‐3.85 ‐1.97 ‐85.99 ‐91.81 ‐7.13%
MW‐22 6/17/2008 24.10 11.31 80.21 0.67 116.30 ‐7.15 ‐1.81 ‐106.81 ‐115.76 0.46%
MW‐22 8/11/2008 24.90 11.27 88.85 0.64 125.66 ‐8.01 ‐1.64 ‐122.22 ‐131.87 ‐4.94%
MW‐22 11/12/2008 24.15 11.40 86.38 0.64 122.57 ‐7.90 ‐1.81 ‐114.93 ‐124.63 ‐1.68%
MW‐22 2/2/2009 20.86 10.13 79.39 0.57 110.95 ‐7.65 ‐1.52 ‐109.10 ‐118.27 ‐6.60%MW 22 2/2/2009 20.86 10.13 79.39 0.57 110.95 7.65 1.52 109.10 118.27 6.60%
MW‐22 5/14/2009 21.56 11.22 81.78 0.60 115.16 ‐7.87 ‐1.64 ‐112.01 ‐121.52 ‐5.52%
MW‐22 8/31/2009 22.65 10.57 79.23 0.63 113.08 ‐8.21 ‐1.75 ‐112.01 ‐121.97 ‐7.87%
MW‐22 10/27/2009 22.60 10.83 80.87 0.61 114.92 ‐8.18 ‐1.89 ‐108.06 ‐118.13 ‐2.79%
MW‐22 2/8/2010 21.91 10.79 77.50 0.61 110.80 ‐8.72 ‐1.72 ‐103.89 ‐114.33 ‐3.19%
Notes:
HCO3= Bicarbonate
meq/L= milliequivalent per liter
Page 1 of 1
Table 7
Relative Percent Difference Between Primary and Duplicate Samples
Well Chemical Sample Date Result QUAL
Duplicate
Result
Duplicate
Qualifier
Detection
Limit Units
Relative
Percent
Difference
MW 22 Acetone 8/11/2008 20 U 20 U 20 ug/L 0.00%
MW 22 Acetone 8/26/2009 20 U 20 U 20 ug/L 0.00%
MW 22 Acetone 10/27/2009 20 U 20 U 20 ug/L 0.00%
MW 22 Arsenic 8/11/2008 5 U 5 U 5 ug/L 0.00%
MW 22 Arsenic 8/31/2009 5 U 5 U 5 ug/L 0.00%
MW 22 Arsenic 10/27/2009 5 U 5 U 5 ug/L 0.00%
MW 22 Benzene 8/11/2008 1 U 1 U 1 ug/L 0.00%
MW 22 Benzene 8/26/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Benzene 10/27/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Beryllium 8/11/2008 2.69 2.44 0.5 ug/L 10.25%
MW 22 Beryllium 8/31/2009 2.31 2.1 0.5 ug/L 10.00%
MW 22 Beryllium 10/27/2009 2.5 2.8 0.5 ug/L -10.71%
MW 22 Cadmium 8/11/2008 81.8 84.1 0.5 ug/L -2.73%
MW 22 Cadmium 8/31/2009 87.3 85.9 0.5 ug/L 1.63%
MW 22 Cadmium 10/27/2009 91.4 90.6 0.5 ug/L 0.88%
MW 22 Calcium 8/11/2008 499 D 503 D 1 mg/L -0.80%
MW 22 Calcium 8/31/2009 454 D 454 D 2.5 mg/L 0.00%
MW 22 Calcium 10/27/2009 453 D 461 D 2 mg/L -1.74%
MW 22 Carbon tetrachloride 8/11/2008 1 U 1 U 1 ug/L 0.00%
MW 22 Carbon tetrachloride 8/26/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Carbon tetrachloride 10/27/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Chloride 8/11/2008 58 57 1 mg/L 1.75%
MW 22 Chloride 8/31/2009 62 58 1 mg/L 6.90%
MW 22 Chloride 10/27/2009 67 64 1 mg/L 4.69%
MW 22 Chloroform 8/11/2008 1 U 1 U 1 ug/L 0.00%
MW 22 Chloroform 8/26/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Chloroform 10/27/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Chloromethane 8/11/2008 1 U 1 U 1 ug/L 0.00%
MW 22 Chloromethane 8/26/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Chloromethane 10/27/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Chromium 8/11/2008 25 U 25 U 25 ug/L 0.00%
MW 22 Chromium 8/31/2009 25 U 25 U 25 ug/L 0.00%
MW 22 Chromium 10/27/2009 25 U 25 U 25 ug/L 0.00%
MW 22 Cobalt 8/11/2008 264 277 10 ug/L -4.69%
MW 22 Cobalt 8/31/2009 283 283 10 ug/L 0.00%
MW 22 Cobalt 10/27/2009 308 298 10 ug/L 3.36%
MW 22 Copper 8/11/2008 10 U 10 U 10 ug/L 0.00%
MW 22 Copper 8/31/2009 10 U 10 U 10 ug/L 0.00%
MW 22 Copper 10/27/2009 10 10 10 ug/L 0.00%
MW 22 Fluoride 8/11/2008 2.9 2.9 0.1 mg/L 0.00%
MW 22 Fluoride 8/31/2009 2.8 3 0.1 mg/L -6.67%
MW 22 Fluoride 10/27/2009 3.2 3 0.1 mg/L 6.67%
MW 22 Gross Alpha minus Rn & U 8/11/2008 3.1 4 -5000 pCi/L -22.50%
MW 22 Gross Alpha minus Rn & U 8/31/2009 3 3.4 -1000 pCi/L -11.76%
MW 22 Gross Alpha minus Rn & U 10/27/2009 4.7 4.9 -1000 pCi/L -4.08%
MW 22 Iron 8/11/2008 46 UD 46 UD 46 ug/L 0.00%
MW 22 Iron 8/31/2009 30 U 30 U 30 ug/L 0.00%
MW 22 Iron 10/27/2009 30 U 30 U 30 ug/L 0.00%
MW 22 Lead 8/11/2008 1 U 1 U 1 ug/L 0.00%
MW 22 Lead 8/31/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Lead 10/27/2009 1 1 U 1 ug/L 0.00%
MW 22 Manganese 8/11/2008 32500 32800 10 ug/L -0.91%
MW 22 Manganese 8/31/2009 32200 32100 14 ug/L 0.31%
MW 22 Manganese 10/27/2009 31800 32200 10 ug/L -1.24%
MW 22 Mercury 8/11/2008 0.5 U 0.5 U 0.5 ug/L 0.00%
MW 22 Mercury 8/31/2009 0.5 U 0.5 U 0.5 ug/L 0.00%
MW 22 Mercury 10/27/2009 0.5 U 0.5 U 0.5 ug/L 0.00%
MW 22 Methyl ethyl ketone 8/11/2008 20 U 20 U 20 ug/L 0.00%
MW 22 Methyl ethyl ketone 8/26/2009 20 U 20 U 20 ug/L 0.00%
MW 22 Methyl ethyl ketone 10/27/2009 20 U 20 U 20 ug/L 0.00%
MW 22 Methylene chloride 8/11/2008 1 U 1 U 1 ug/L 0.00%
MW 22 Methylene chloride 8/26/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Methylene chloride 10/27/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Molybdenum 8/11/2008 233 246 10 ug/L -5.28%
Page 1 of 2
Table 7
Relative Percent Difference Between Primary and Duplicate Samples
Well Chemical Sample Date Result QUAL
Duplicate
Result
Duplicate
Qualifier
Detection
Limit Units
Relative
Percent
Difference
MW 22 Molybdenum 8/31/2009 587 578 10 ug/L 1.56%
MW 22 Molybdenum 10/27/2009 567 567 10 ug/L 0.00%
MW 22 Naphthalene 8/11/2008 1 U 1 U 1 ug/L 0.00%
MW 22 Naphthalene 8/26/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Naphthalene 10/27/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Nickel 8/11/2008 135 137 20 ug/L -1.46%
MW 22 Nickel 8/31/2009 141 141 20 ug/L 0.00%
MW 22 Nickel 10/27/2009 142 142 20 ug/L 0.00%
MW 22 Nitrogen, Ammonia as N 8/11/2008 0.2 0.2 0.1 mg/L 0.00%
MW 22 Nitrogen, Ammonia as N 8/26/2009 0.72 0.94 0.05 mg/L -23.40%
MW 22 Nitrogen, Ammonia as N 10/27/2009 0.6 0.92 0.05 mg/L -34.78%
MW 22 Nitrogen, Nitrate+Nitrite as N 8/11/2008 3.83 4.04 0.05 mg/L -5.20%
MW 22 Nitrogen, Nitrate+Nitrite as N 8/26/2009 3.4 3.6 0.2 mg/L -5.56%
MW 22 Nitrogen, Nitrate+Nitrite as N 10/27/2009 3.8 3.8 0.2 mg/L 0.00%
MW 22 pH 8/11/2008 6.27 6.28 0.01 s.u. -0.16%
MW 22 pH 8/31/2009 7.04 6.36 0.01 s.u. 10.69%
MW 22 pH 10/27/2009 7.22 6.72 0.01 s.u. 7.44%
MW 22 Potassium 8/11/2008 24.9 24.2 0.5 mg/L 2.89%
MW 22 Potassium 8/31/2009 24.5 D 23.8 D 1 mg/L 2.94%
MW 22 Potassium 10/27/2009 24 D 24 D 1 mg/L 0.00%
MW 22 Selenium 8/11/2008 9.8 10.7 5 ug/L -8.41%
MW 22 Selenium 8/31/2009 10.8 10.5 5 ug/L 2.86%
MW 22 Selenium 10/27/2009 12.1 11.8 5 ug/L 2.54%
MW 22 Silver 8/11/2008 10 U 10 U 10 ug/L 0.00%
MW 22 Silver 8/31/2009 10 U 10 U 10 ug/L 0.00%
MW 22 Silver 10/27/2009 10 U 10 U 10 ug/L 0.00%
MW 22 Sodium 8/11/2008 259 D 259 D 7.6 mg/L 0.00%
MW 22 Sodium 8/31/2009 243 D 241 D 2.3 mg/L 0.83%
MW 22 Sodium 10/27/2009 249 D 241 D 2 mg/L 3.32%
MW 22 Sulfate 8/11/2008 5870 D 5490 D 100 mg/L 6.92%
MW 22 Sulfate 8/31/2009 5380 D 5260 D 60 mg/L 2.28%
MW 22 Sulfate 10/27/2009 5190 D 5370 D 60 mg/L -3.35%
MW 22 TDS @ 180 C 8/11/2008 7620 7590 10 mg/L 0.40%
MW 22 TDS @ 180 C 8/31/2009 7430 7610 10 mg/L -2.37%
MW 22 TDS @ 180 C 10/27/2009 7600 7660 10 mg/L -0.78%
MW 22 Thallium 8/11/2008 1.04 1.13 0.5 ug/L -7.96%
MW 22 Thallium 8/31/2009 1.22 1.18 0.5 ug/L 3.39%
MW 22 Thallium 10/27/2009 1.2 1.17 0.5 ug/L 2.56%
MW 22 Tin 8/11/2008 100 U 100 U 100 ug/L 0.00%
MW 22 Tin 8/31/2009 100 U 100 U 100 ug/L 0.00%
MW 22 Tin 10/27/2009 100 U 100 U 100 ug/L 0.00%
MW 22 Toluene 8/11/2008 1 U 1 U 1 ug/L 0.00%
MW 22 Toluene 8/26/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Toluene 10/27/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Uranium 8/11/2008 46.7 54.4 0.3 ug/L -14.15%
MW 22 Uranium 8/31/2009 51.7 51.6 0.3 ug/L 0.19%
MW 22 Uranium 10/27/2009 51.7 48.2 0.3 ug/L 7.26%
MW 22 Vanadium 8/11/2008 15 U 15 U 15 ug/L 0.00%
MW 22 Vanadium 8/31/2009 15 U 15 U 15 ug/L 0.00%
MW 22 Vanadium 10/27/2009 15 U 15 U 15 ug/L 0.00%
MW 22 Xylenes, Total 8/11/2008 1 U 1 U 1 ug/L 0.00%
MW 22 Xylenes, Total 8/26/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Xylenes, Total 10/27/2009 1 U 1 U 1 ug/L 0.00%
MW 22 Zinc 8/11/2008 524 542 10 ug/L -3.32%
MW 22 Zinc 8/31/2009 501 500 10 ug/L 0.20%
MW 22 Zinc 10/27/2009 532 527 10 ug/L 0.95%
Page 2 of 2
Table 8
Flow Sheet GWCL Calculations Based on UDEQ Approved Flow Sheet
Well Constituent GWQS N % Detected Distribution
a (r2)
Regression
Trendb
Mann-Kendall
Trendc Mean
Standard
Deviation (σ)
Highest
Observed Value
(lowest for pH) Poisson Limit
Fractional
Approach
GWCL
Flow Sheet
GWCL
Flow Sheet
GWCL
Exceeds
GWQS? Comment
Ammonia 25 8 75.0% Normal or Lognormal 0.458911 down None 0.27 0.29 0.69 12.5 0.9 no Cohen's Mean + 2σ
Nitrate+Nitrite as N 10 8 100.0% Normal or Lognormal 0.758189 up 5.01 1.24 6.5 5 7.5 no Mean + 2σ
Arsenic 50 8 0.0% Not Tested None 6.07 25 25 no Permit GWCL
Beryllium 4 8 0.0% Not Tested None 1.59 22noPermit GWCL
Cadmium 5 7 0.0% Not Tested None 1.92 2.5 2.5 no Permit GWCL
Chromium 100 8 0.0% Not Tested None 20.10 50 50 no Permit GWCL
Cobalt 730 8 0.0% Not Tested None 9.92 365 365 no Permit GWCL
Copper 1,300 8 0.0% Not Tested None 9.92 650 650 no Permit GWCL
Iron 11,000 8 12.5% Not Tested 0.233 down None 50 5500 5500 no Permit GWCL
Lead 15 8 0.0% Not Tested None 2.26 7.5 7.5 no Permit GWCL
Manganese 800 8 100.0% Normal or Lognormal 0.600000 down 41.25 19.43 77 400 80 no Permit GWCL
Mercury 2 8 0.0% Not Tested None 1.6 1 1.6 no Poisson Limit
Molybdenum 40 7 0.0% Not Tested None 11.20 20 20 no Permit GWCL
Nickel 100 8 00%Not Tested None 16 80 50 50 no Permit GWCL
Nutrients (mg/L)
Heavy Metals (ug/L)
Nickel 100 8 0.0%Not Tested None 16.80 50 50 no Permit GWCL
Selenium 50 8 0.0% Not Tested None 6.07 25 25 no Permit GWCL
Silver 100 8 0.0% Not Tested None 9.92 50 50 no Permit GWCL
Thallium 2 7 28.6% Not Tested None 0.58 1 1 no Permit GWCL
Tin 17,000 8 0.0% Not Tested None 65.00 8500 8500 no Permit GWCL
Uranium 30 8 100.0% Normal or Lognormal 0.835660 down 19.69 8.32 34.6 15 36 YES Mean + 2σ
Vanadium 60 8 0.0% Not Tested None 13.50 30 30 no Permit GWCL
Zinc 5,000 8 100.0% Normal or Lognormal 0.000119 57.75 24.25 92 2500 106 no Mean + 2σ
Gross Alpha minus Rn & U 15 8 75.0%Normal or Lognormal 0.335703 down None 0.86 0.72 2.1 7.5 2 no Aitchison's Mean + 2σ
Acetone 700 8 0.0% Not Tested None 16.80 350 350 no Permit GWCL
Benzene 5 8 0.0% Not Tested None 2.26 2.5 2.5 no Permit GWCL
2-Butanone (MEK) 4,000 8 0.0% Not Tested None 16.80 2000 2000 no Permit GWCL
Carbon Tetrachloride 5 8 0.0% Not Tested None 2.26 2.5 2.5 no Permit GWCL
Chloroform 70 8 0.0% Not Tested None 2.26 35 35 no Permit GWCL
Chloromethane 30 8 0.0% Not Tested None 2.26 15 15 no Permit GWCL
Dichloromethane 5 7 0.0% Not Tested None 2.26 2.5 2.5 no Permit GWCL
Naphthalene 100 8 0.0% Not Tested None 2.26 50 50 no Permit GWCL
Tetrahydrofuran 46 7 0.0% Not Tested None 3.36 23 23 no Permit GWCL
Toluene 1 000 8 00%Not Tested None 226 500 500 no Permit GWCL
MW
-
2
0
Radiologics (pCi/L)
Volatile Organic Compounds (ug/L)
Toluene 1,000 8 0.0%Not Tested None 2.26 500 500 no Permit GWCL
Xylenes (total) 10,000 8 0.0% Not Tested None 2.26 5000 5000 no Permit GWCL
Chloride (mg/L) 8 100.0% Normal or Lognormal 0.252500 up 63.75 5.18 71 74.1 no Mean + 2σ
Fluoride (mg/L) 4 8 100.0% Normal or Lognormal 0.892900 up 0.29 0.03 0.33 2 2.0 no Permit GWCL
pH (s.u.) 6.5-8.5 8 100.0% Normal or Lognormal 0.037499 down 7.21 0.11 7.12 7.0 no Mean - 2σ
Sulfate (mg/L) 7 100.0% Not Tested 3824.30 135.80 3990 4096 no Mean + 2σ (less than 8N)
TDS @ 180 C (mg/L) 7 100.0% Not Tested 5662.90 114.30 5820 5892 no Mean + 2σ (less than 8N)
Notes:
a = The Shapiro-Wilk Distribution test was performed on data with % Detect > 50%. For % Detect > 85%, 1/2 the detection limit was substituted for non-detected values, and for % Detect > 50% and < 85% the test was done on detected values only
b = A regression test was performed on data that was determined to have either a normal or log-normal distribution and % Detect > 50%. 1/2 of the detection limit was used for non-detected values
c = The Mann-Kendall test was performed on data with either a non-parametric distribution or with % Detect < 50%, it was not performed on constituents where N < 8
GWQS = Ground Water Quality Standard
N = Number of occurrences in the database
% Detect = The percent at which a constituent was detected in a given well
Distribution = Distribution as determined by the Shapiro-Wilk distribution test for constituents with % Detect > 50% and N>8
r2 = The measure of how well the trendline fits the data for regression analysis, where r2 = 1 represents a perfect fit
Red r2 value = Significantly trending
Regression Trend = The result of the linear regression test analysis using 1/2 of the detection limit for values reported as "not detected"
Mann-Kendall Trend = The result of the Mann-Kendall test for non-parametric distributions and for % Detect < 50%
Other
Mann Kendall Trend = The result of the Mann Kendall test for non parametric distributions and for % Detect < 50%
Mean = The arithmatic, Cohen, or Aitchison mean as determined for normally or log-normally distributed constituents with % Detect > 50%
Standard Deviation = The standard deviation as determined for normally or log-normally distributed constituents with % Detect > 85%
Highest Observed Value = The highest observed value for constituents with % Detect < 50%
Poisson Limit = The calculated highest value for constituents with % Detect < 10% and assuming a Poisson distribution
Fractional Approach GWCL = 1/4 of the GWQS for Class II water, and 1/2 of the GWQS Class III water.
Flow Sheet GWCL = The Groundwater Compliance Limit as determined by the Flow Sheet for calculating the GWCL based on the % Detect
Cohen's Mean and Standard Deviation = The mean and standard deviation as determined by the Cohen adjustment for non-detected values for constituents with 50 to 85% detects when the censored probability plot is more linear than the probability plot of detected values only.
Aitchison's Mean and Standard Deviation= The mean and standard deviation as determined by the Aitchison adjustment for non-detected values for constituents with 50 to 85% detects when the probability plot of detected values only is more linear than the censored probability plot.
Yellow Highlight = Significantly increasing (or decreasing in the case of pH) trends and/or cases where the Flow Sheet GWCL exceeds the GWQS.
BOLD = Flow Sheet GWCL is lower than Fractional Approach value
Page 1 of 2
Table 8
Flow Sheet GWCL Calculations Based on UDEQ Approved Flow Sheet
Well Constituent GWQS N % Detected Distribution
a (r2)
Regression
Trendb
Mann-Kendall
Trendc Mean
Standard
Deviation (σ)
Highest
Observed Value
(lowest for pH) Poisson Limit
Fractional
Approach
GWCL
Flow Sheet
GWCL
Flow Sheet
GWCL
Exceeds
GWQS? Comment
Ammonia 25 8 100.0% Non-Parametric 0.570299 up 0.72 12.5 12.5 no Permit GWCL
Nitrate+Nitrite as N 10 8 100.0% Normal or Lognormal 0.357095 down 3.50 0.40 3.91 5 4.3 no Mean + 2σ
Arsenic 50 8 0.0% Not Tested None 6.07 25 25 no Permit GWCL
Beryllium 4 8 100.0% Normal or Lognormal 0.086012 up 2.63 0.35 3.17 2 3.3 no Mean + 2σ
Cadmium 5 8 100.0% Normal or Lognormal 0.087900 up 89.90 4.11 94.6 2.5 98.1 YES Mean + 2σ
Chromium 100 8 0.0% Not Tested None 20.10 50 50 no Permit GWCL
Cobalt 730 8 100.0% Normal or Lognormal 0.270700 up 288.88 17.42 312 365 324 no Mean + 2σ
Copper 1,300 8 62.5% Non-Parametric 0.118857 down None 11.10 4.80 19 650 21 no Cohen's Mean + 2σ
Iron 11,000 8 25.0% Not Tested 0.182200 None 50 5500 5500 no Permit GWCL
Lead 15 8 37.5% Not Tested 0.279900 None 1.2 7.5 7.5 no Permit GWCL
Manganese 800 8 100.0% Normal or Lognormal 0.039539 down 31800.00 1104.54 33300 400 34009 YES Mean + 2σ
Mercury 2 7 0.0% Not Tested None 1.59 1 1.59 no Poisson Limit
Molybdenum 40 8 100.0% Non-Parametric 0.608625 up 620 20 620 YES Highest Historical Value
Nickel 100 8 100 0%Non Parametric 0 287585 up 144 50 144 YES Highest Historical Value
Nutrients (mg/L)
Heavy Metals (ug/L)
Nickel 100 8 100.0%Non-Parametric 0.287585 up 144 50 144 YES Highest Historical Value
Selenium 50 8 100.0% Normal or Lognormal 0.040718 down 11.94 1.84 15.3 25 15.6 no Mean + 2σ
Silver 100 8 0.0% Not Tested None 9.92 50 50 no Permit GWCL
Thallium 2 7 100.0% Not Tested 1.20 0.20 1.5 1 1.6 no Mean + 2σ (less than 8N)
Tin 17,000 8 0.0% Not Tested None 65.00 8500 8500 no Permit GWCL
Uranium 30 8 100.0% Normal or Lognormal 0.074367 down 48.95 3.05 52.4 15 55.0 YES Mean + 2σ
Vanadium 60 8 0.0% Not Tested None 13.50 30 30 no Permit GWCL
Zinc 5,000 8 100.0% Normal or Lognormal 0.271398 up 534.38 47.05 606 2500 628 no Mean + 2σ
Gross Alpha minus Rn & U 15 8 100.0% Non-Parametric 0.066832 down 5.5 7.5 7.5 no Permit GWCL
Acetone 700 8 0.0% Not Tested None 16.80 350 350 no Permit GWCL
Benzene 5 8 0.0% Not Tested None 2.26 2.5 2.5 no Permit GWCL
2-Butanone (MEK) 4,000 8 0.0% Not Tested None 16.80 2000 2000 no Permit GWCL
Carbon Tetrachloride 5 8 0.0% Not Tested None 2.26 2.5 2.5 no Permit GWCL
Chloroform 70 8 0.0% Not Tested None 2.26 35 35 no Permit GWCL
Chloromethane 30 8 0.0% Not Tested None 2.26 15 15 no Permit GWCL
Dichloromethane 5 7 0.0% Not Tested None 2.26 2.5 2.5 no Permit GWCL
Naphthalene 100 8 0.0% Not Tested None 2.26 50 50 no Permit GWCL
Tetrahydrofuran 46 7 0.0% Not Tested None 3.36 23 23 no Permit GWCL
Toluene 1 000 8 00%Not Tested None 226 500 500 no Permit GWCL
Volatile Organic Compounds (ug/L)
MW
-
2
2
Radiologics (pCi/L)
Toluene 1,000 8 0.0%Not Tested None 2.26 500 500 no Permit GWCL
Xylenes (total) 10,000 8 0.0% Not Tested None 2.26 5000 5000 no Permit GWCL
Chloride (mg/L) 8 100.0% Normal or Lognormal 0.030300 up 61.00 4.17 67 69.3 no Mean + 2σ
Fluoride (mg/L) 4 8 100.0% Normal or Lognormal 0.433564 up 2.96 0.16 3.2 2 3.3 no Mean + 2σ
pH (s.u.) 6.5-8.5 8 100.0% Normal or Lognormal 0.422579 down 5.82 0.23 5.53 5.4 YES Mean - 2σ
Sulfate (mg/L) 8 100.0% Normal or Lognormal 0.275655 down 5337.50 271.39 5870 5880 no Mean + 2σTDS @ 180 C (mg/L) 8 100.0% Normal or Lognormal 0.078114 down 7537.50 365.07 7920 8268 no Mean + 2σ
Notes:
a = The Shapiro-Wilk Distribution test was performed on data with % Detect > 50%. For % Detect > 85%, 1/2 the detection limit was substituted for non-detected values, and for % Detect > 50% and < 85% the test was done on detected values only
b = A regression test was performed on data that was determined to have either a normal or log-normal distribution and % Detect > 50%. 1/2 of the detection limit was used for non-detected values
c = The Mann-Kendall test was performed on data with either a non-parametric distribution or with % Detect < 50%, it was not performed on constituents where N < 8
GWQS = Ground Water Quality Standard
N = Number of occurrences in the database
% Detect = The percent at which a constituent was detected in a given well
Distribution = Distribution as determined by the Shapiro-Wilk distribution test for constituents with % Detect > 50% and N>8
r2 = The measure of how well the trendline fits the data for regression analysis, where r2 = 1 represents a perfect fit
Red r2 value = Significantly trending
Regression Trend = The result of the linear regression test analysis using 1/2 of the detection limit for values reported as "not detected"
Mann-Kendall Trend =The result of the Mann-Kendall test for non-parametric distributions and for % Detect <50%
Other
Mann-Kendall Trend = The result of the Mann-Kendall test for non-parametric distributions and for % Detect < 50%
Mean = The arithmatic, Cohen, or Aitchison mean as determined for normally or log-normally distributed constituents with % Detect > 50%
Standard Deviation = The standard deviation as determined for normally or log-normally distributed constituents with % Detect > 85%
Highest Observed Value = The highest observed value for constituents with % Detect < 50%
Poisson Limit = The calculated highest value for constituents with % Detect < 10% and assuming a Poisson distribution
Fractional Approach GWCL = 1/4 of the GWQS for Class II water, and 1/2 of the GWQS Class III water.
Flow Sheet GWCL = The Groundwater Compliance Limit as determined by the Flow Sheet for calculating the GWCL based on the % Detect
Cohen's Mean and Standard Deviation = The mean and standard deviation as determined by the Cohen adjustment for non-detected values for constituents with 50 to 85% detects when the censored probability plot is more linear than the probability plot of detected values only.
Aitchison's Mean and Standard Deviation= The mean and standard deviation as determined by the Aitchison adjustment for non-detected values for constituents with 50 to 85% detects when the probability plot of detected values only is more linear than the censored probability plot.
Yellow Highlight = Significantly increasing (or decreasing in the case of pH) trends and/or cases where the Flow Sheet GWCL exceeds the GWQS.
BOLD = Flow Sheet GWCL is lower than Fractional Approach value
Page 2 of 2
TABLE 9
Well Construction Parameters
Well
Approximate
Depth to Top
of Screen
(feet)
Approximate
Depth of Base
of Screen
(feet)
Approximate
Depth to Base
of Bore
Annular Seal
(feet)
Approximate
Depth to
Brushy Basin
(feet)
Depth to
Water1
(feet bls)
Approximate
Casing
Diameter
(inches)
Approximate
Bore Diameter
(inches)
Effective
Screen
Length
(feet)
Filter Pack
(yes/no)
MW-20 80 90 73 90 78.1 4 7.875 17 Yes
MW-22 80 120 68 120 69.2 4 7.875 51 Yes

Notes:
Data from HGC 2002
1 Depth to water was at time of test (July 2002)

Appendix A
Box Plots
Acetone Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
18
19
20
21
22
Ac
e
t
o
n
e

(
µ
g
/
L
)
Appendix A
Box Plots
Arsenic Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
3
4
5
6
7
Ar
s
e
n
i
c

(
µ
g
/
L
)
Appendix A
Box Plots
Benzene Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
-1
0
1
2
3
Be
n
z
e
n
e

(
µ
g
/
L
)
Appendix A
Box Plots
Beryllium Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
Be
r
y
l
l
i
u
m

(
µ
g
/
L
)
Appendix A
Box Plots
Cadmium Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
-20
0
20
40
60
80
100
Ca
d
m
i
u
m

(
µ
g
/
L
)
Appendix A
Box Plots
Carbon tetrachloride Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
-1
0
1
2
3
Ca
r
b
o
n

t
e
t
r
a
c
h
l
o
r
i
d
e

(
µ
g
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L
)
Appendix A
Box Plots
Chloride Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
52
54
56
58
60
62
64
66
68
70
72
Ch
l
o
r
i
d
e

(
m
g
/
L
)
Appendix A
Box Plots
Chloroform Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
-1
0
1
2
3
Ch
l
o
r
o
f
o
r
m

(
µ
g
/
L
)
Appendix A
Box Plots
Chloromethane Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
-1
0
1
2
3
Ch
l
o
r
o
m
e
t
h
a
n
c
e

(
µ
g
/
L
)
Appendix A
Box Plots
Chromium Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
23
24
25
26
27
Ch
r
o
m
i
u
m

(
µ
g
/
L
)
Appendix A
Box Plots
Cobalt Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
-50
0
50
100
150
200
250
300
350
Co
b
a
l
t

(
µ
g
/
L
)
Appendix A
Box Plots
Copper Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
8
10
12
14
16
18
20
Co
p
p
e
r

(
µ
g
/
L
)
Appendix A
Box Plots
Fluoride Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Fl
u
o
r
i
d
e

(
m
g
/
L
)
Appendix A
Box Plots
Gross Alpha Minus Rn & U Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
0
1
2
3
4
5
6
Gr
o
s
s

A
l
p
h
a

M
i
n
u
s

Rn

&

U

(
p
C
i
/
L
)
Appendix A
Box Plots
Iron Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
28
30
32
34
36
38
40
42
44
46
48
50
52
Ir
o
n

(
µ
g
/
L
)
Appendix A
Box Plots
Lead Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
0.98
1.00
1.02
1.04
1.06
1.08
1.10
1.12
1.14
1.16
1.18
1.20
1.22
Le
a
d

(
µ
g
/
L
)
Appendix A
Box Plots
Manganese Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
-5000
0
5000
10000
15000
20000
25000
30000
35000
Ma
n
g
a
n
e
s
e

(
µ
g
/
L
)
Appendix A
Box Plots
Mercury Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
0.49
0.50
0.51
0.52
0.53
0.54
0.55
0.56
0.57
Me
r
c
u
r
y

(
µ
g
/
L
)
Appendix A
Box Plots
Methyl ethyl ketone Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
18
19
20
21
22
Me
t
h
y
l

e
t
h
y
l

k
e
t
o
n
e

(
µ
g
/
L
)
Appendix A
Box Plots
Methylene chloride Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
-1
0
1
2
3
Me
t
h
y
l
e
n
e

c
h
l
o
r
i
d
e

(
µ
g
/
L
)
Appendix A
Box Plots
Molybdenum Box Plot
Median
25%-75%
Non-Outlier Range
Outliers
ExtremesMW-20 MW-22
Well
-100
0
100
200
300
400
500
600
700
Mo
l
y
b
d
e
n
u
m

(
µ
g
/
L
)
Appendix A
Box Plots
Naphthalene Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
-1
0
1
2
3
Na
p
h
t
h
a
l
e
n
e

(
µ
g
/
L
)
Appendix A
Box Plots
Nickel Box Plot
Median
25%-75%
Non-Outlier Range
Outliers
ExtremesMW-20 MW-22
Well
0
20
40
60
80
100
120
140
160
Ni
c
k
e
l

(
µ
g
/
L
)
Appendix A
Box Plots
Nitrogen, Ammonia as N Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
Ni
t
r
o
g
e
n
,

A
m
m
o
n
i
a

a
s

N

(
m
g
/
L
)
Appendix A
Box Plots
Nitrogen, Nitrate + Nitrite as N Box Plot
Median
25%-75%
Non-Outlier Range
Outliers
ExtremesMW-20 MW-22
Well
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
Ni
t
r
o
g
e
n
,

N
i
t
r
a
t
e

+

N
i
tr
i
t
e

a
s

N

(
m
g
/
L
)
Appendix A
Box Plots
Field pH Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
5.4
5.6
5.8
6.0
6.2
6.4
6.6
6.8
7.0
7.2
7.4
7.6
Fi
e
l
d

P
H

(
s
.
u
.
)
Appendix A
Box Plots
Selenium Box Plot
Median
25%-75%
Non-Outlier Range
Outliers
ExtremesMW-20 MW-22
Well
4
6
8
10
12
14
16
Se
l
e
n
i
u
m

(
µ
g
/
L
)
Appendix A
Box Plots
Silver Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
8
9
10
11
12
Si
l
v
e
r

(
µ
g
/
L
)
Appendix A
Box Plots
TDS Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
5000
5500
6000
6500
7000
7500
8000
8500
TD
S

(
m
g
/
L
)
Appendix A
Box Plots
Sulfate Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
3400
3600
3800
4000
4200
4400
4600
4800
5000
5200
5400
5600
5800
6000
Su
l
f
a
t
e

(
m
g
/
L
)
Appendix A
Box Plots
Tetrahydrofuran Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
0
1
2
3
4
Te
t
r
a
h
y
d
r
o
f
u
r
a
n

(
µ
g
/
L
)
Appendix A
Box Plots
Thallium Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
0.4
0.6
0.8
1.0
1.2
1.4
1.6
Th
a
l
l
i
u
m

(
µ
g
/
L
)
Appendix A
Box Plots
Tin Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
98
99
100
101
102
Ti
n

(
µ
g
/
L
)
Appendix A
Box Plots
Toluene Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
-1
0
1
2
3
To
l
u
e
n
e

(
µ
g
/
L
)
Appendix A
Box Plots
Uranium Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
5
10
15
20
25
30
35
40
45
50
55
Ur
a
n
i
u
m

(
µ
g
/
L
)
Appendix A
Box Plots
Vanadium Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
13
14
15
16
17
Va
n
a
d
i
u
m

(
µ
g
/
L
)
Appendix A
Box Plots
Total Xylenes Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
-1
0
1
2
3
To
t
a
l

X
y
l
e
n
e
s

(
µ
g
/
L
)
Appendix A
Box Plots
Zinc Box Plot
Median
25%-75%
1%-99%
Outliers
ExtremesMW-20 MW-22
Well
0
100
200
300
400
500
600
700
Zi
n
c

(
µ
g
/
L
)

Appendix A
Box Plots

Appendix B
Linear Regression Plots
Substituting Half the MDL for Non-detected Values
(Regression Plots for Wells and Constituents with 15-50%
Non-detects are Considered Exploratory Statistics)
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
8
9
10
11
12
Ac
e
t
o
n
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
8
9
10
11
12
Ac
e
t
o
n
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
0
1
2
3
4
5
Ar
s
e
n
i
c

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
0
1
2
3
4
5
Ar
s
e
n
i
c

(
µ
g
/
L
)
Detected Values
Non-Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Be
n
z
e
n
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Be
n
z
e
n
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Be
r
y
l
l
i
u
m

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(100% Detected)
r2 = 0.0860, r = 0.2933, p = 0.4808
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
2.2
2.4
2.6
2.8
3.0
3.2
3.4
Be
r
y
l
l
i
u
m

(
µ
g
/
L
)
Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-22
(100% Detected)
r2 = 0.0879, r = 0.2964, p = 0.4759,
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
80
82
84
86
88
90
92
94
96
Ca
d
m
i
u
m

(
µ
g
/
L
)
Detected Values
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Ca
r
b
o
n

t
e
t
r
a
c
h
l
o
r
i
d
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Ca
r
b
o
n

t
e
t
r
a
c
h
l
o
r
i
d
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(100% Detected)
r2 = 0.2525, r = 0.5025, p = 0.2044
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
56
58
60
62
64
66
68
70
72
Ch
l
o
r
i
d
e

(
m
g
/
L
)
Detected Values
MW-22
(100% Detected)
r2 = 0.0303, r = 0.1740, p = 0.6803
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
52
54
56
58
60
62
64
66
68
Ch
l
o
r
i
d
e

(
m
g
/
L
)
Detected Values
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Ch
l
o
r
o
f
o
r
m

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Ch
l
o
r
o
f
o
r
m

(
µ
g
/
L
)
Detected Values
Non-Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Ch
l
o
r
o
m
e
t
h
a
n
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
10
11
12
13
14
15
Ch
r
o
m
i
u
m

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
10
11
12
13
14
15
Ch
r
o
m
i
u
m

(
µ
g
/
L
)
Detected Values
Non-Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
3
4
5
6
7
Co
b
a
l
t

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(100% Detected)
r2 = 0.2707, r = 0.5203, p = 0.1862
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
260
270
280
290
300
310
320
Co
b
a
l
t

(
µ
g
/
L
)
Detected Values
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
3
4
5
6
7
Co
p
p
e
r

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(62.5% Detected)
r2 = 0.1189; r = -0.3448, p = 0.4030
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
4
6
8
10
12
14
16
18
20
Co
p
p
e
r

(
µ
g
/
L
)
Detected Values
Non-Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(100% Detected)
r2 = 0.8929, r = 0.9449, p = 0.0004
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
0.22
0.24
0.26
0.28
0.30
0.32
0.34
Fl
u
o
r
i
d
e

(
m
g
/
L
)
Detected Values
MW-22
(100% Detected)
r2 = 0.4336, r = 0.6585, p = 0.0758
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
2.7
2.8
2.9
3.0
3.1
3.2
3.3
Fl
u
o
r
i
d
e

(
m
g
/
L
)
Detected Values
MW-20
(75% Detected)
r 2 = 0.3357, r = -0.5794, p = 0.1323
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
Gr
o
s
s

A
l
p
h
a

M
i
n
u
s

R
n

&

U

(
p
C
i
/
L
)
Detected Values
Non-Detected Values
MW-22
(100% Detected)
r2 = 0.0668, r = -0.2585, p = 0.5364
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
2.6
2.8
3.0
3.2
3.4
3.6
3.8
4.0
4.2
4.4
4.6
4.8
5.0
5.2
5.4
5.6
5.8
Gr
o
s
s

A
l
p
h
a

M
i
n
u
s

R
n

&

U

(
p
C
i
/
L
)
Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(12.5% Detected)
r 2 = 0.2333, r = -0.4831, p = 0.2253
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
14
16
18
20
22
24
26
28
30
32
34
36
38
40
Ir
o
n

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(25% Detected)
r 2 = 0.1822, r = -0.4269, p = 0.2916
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
Ir
o
n

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Le
a
d

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(37.5% Detected)
r2 = 0.2799, r = 0.5291, p = 0.1776
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
Le
a
d

(
µ
g
/
L
)
Detected Values
Non-Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(100% Detected)
r2 = 0.6000, r = -0.7746, p = 0.0240
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
10
20
30
40
50
60
70
80
Ma
n
g
a
n
e
s
e

(
µ
g
/
L
)
Detected Values
MW-22
(100% Detected)
r2 = 0.0395, r = -0.1988, p = 0.6369
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
29500
30000
30500
31000
31500
32000
32500
33000
33500
Ma
n
g
a
n
e
s
e

(
µ
g
/
L
)
Detected Values
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Me
r
c
u
r
y

(
µ
g
/
L
)
Detected Values
Non-Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
8
9
10
11
12
Me
t
h
y
l

e
t
h
y
l

k
e
t
o
n
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
8
9
10
11
12
Me
t
h
y
l

e
t
h
y
l

k
e
t
o
n
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(100% Detected)
r2 = 0.6086, r = 0.7801, p = 0.0224
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
150
200
250
300
350
400
450
500
550
600
650
Mo
l
y
b
d
e
n
u
m

(
µ
g
/
L
)
Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Na
p
h
t
h
a
l
e
n
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Na
p
h
t
h
a
l
e
n
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
8
9
10
11
12
Ni
c
k
e
l

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(100% Detected)
r2 = 0.2876, r = 0.5363, p = 0.1706
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
116
118
120
122
124
126
128
130
132
134
136
138
140
142
144
146
Nic
k
e
l

(
µ
g
/
L
)
Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(75% Detected)
r 2 = 0.4589, r = -0.6774, p = 0.0649
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-0.1
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
Nit
r
o
g
e
n
,

A
m
m
o
n
i
a

a
s

N

(
m
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(100% Detected)
r2 = 0.5703, r = 0.7552, p = 0.0303
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
Nit
r
o
g
e
n
,

A
m
m
o
n
i
a

a
s

N

(
m
g
/
L
)
Detected Values
MW-20(100% Detected)
r2 = 0.7582, r = 0.8707, p = 0.0049
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
Nit
r
o
g
e
n
,

N
i
t
r
a
t
e

+

N
i
t
r
i
t
e

a
s

N

(
m
g
/
L
)
Detected Values
MW-22(100% Detected)
r2 = 0.3571, r = -0.5976, p = 0.1177
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
2.6
2.8
3.0
3.2
3.4
3.6
3.8
4.0
Nit
r
o
g
e
n
,

N
i
t
r
a
t
e

+

N
i
t
r
i
t
e

a
s

N

(
m
g
/
L
)
Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20(100% Detected)
r2 = 0.0375, r = -0.1936, p = 0.6459
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10
Date
7.10
7.15
7.20
7.25
7.30
7.35
7.40
7.45
Fie
l
d

p
H

(
s
.
u
.
)
Detected Values
MW-22(100% Detected)r2 = 0.4226, r = -0.6501, p = 0.0810
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10
Date
5.5
5.6
5.7
5.8
5.9
6.0
6.1
6.2
6.3
Fie
l
d

p
H
Detected Values
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
0
1
2
3
4
5
Se
l
e
n
i
u
m

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(100% Detected)
r2 = 0.0407, r = -0.2018, p = 0.6318
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
9
10
11
12
13
14
15
16
Se
l
e
n
i
u
m

(
µ
g
/
L
)
Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
3
4
5
6
7
Sil
v
e
r

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
3
4
5
6
7
Sil
v
e
r

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(100% Detected)
r2 = 0.2757, r = -0.5250, p = 0.1815
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
4900
5000
5100
5200
5300
5400
5500
5600
5700
5800
5900
6000
Su
l
f
a
t
e

(
m
g
/
L
)
Detected Values
MW-22
(100% Detected)
r2 = 0.0781, r = -0.2795, p = 0.5026
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
6800
7000
7200
7400
7600
7800
8000
TD
S

(
m
g
/
L
)
Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
48
49
50
51
52
Tin

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
48
49
50
51
52
Tin

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
To
l
u
e
n
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
To
l
u
e
n
e

(
µ
g
/
L
)
Detected Values
Non-Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(100% Detected)
r2 = 0.8357, r = -0.9141, p = 0.0015
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
Ur
a
n
i
u
m

(
µ
g
/
L
)
Detected Values
MW-22
(100% Detected)
r2 = 0.0744, r = -0.2727, p = 0.5135
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
42
44
46
48
50
52
54
Ur
a
n
i
u
m

(
µ
g
/
L
)
Detected Values
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
5
6
7
8
9
10
Va
n
a
d
i
u
m

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
5
6
7
8
9
10
Va
n
a
d
i
u
m

(
µ
g
/
L
)
Detected Values
Non-Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.
MW-20
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Xy
l
e
n
e
s

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-22
(0% Detected)
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
-2
-1
0
1
2
3
Xy
l
e
n
e
s

(
µ
g
/
L
)
Detected Values
Non-Detected Values
MW-20
(100% Detected)
r2 = 0.0001, r = 0.0109, p = 0.9796
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
20
30
40
50
60
70
80
90
100
Zin
c

(
µ
g
/
L
)
Detected Values
MW-22
(100% Detected)
r2 = 0.2714, r = 0.5210, p = 0.1855
2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10
Sample Date
440
460
480
500
520
540
560
580
600
620
Zin
c

(
µ
g
/
L
)
Detected Values
Regression Analysis
Appenidx B
Regression Plots
Substituting Half of the MDL for Non-detected Values (Regression Plots for Wells
and Constituents with 15-50% Non-detects are Considered Exploratory Statistics.
Data Sets with less than eight data points were not plotted.

Appendix C
Probability Plots
Substituting Half the MDL for Non-detected Values
MW-20(75% Detected)
-0.1 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Censored Ammonia Concentration (mg/L)
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
Ex
p
e
c
t
e
d

N
o
r
m
a
l

V
a
l
u
e
MW-20
(75% Detected)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Detected Ammonia Concentration (mg/L)
-1.4
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Ex
p
e
c
t
e
d

N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
-0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1
Log Ammonia Concentration (mg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
0.34 0.36 0.38 0.40 0.42 0.44 0.46 0.48 0.50 0.52
Log Beryllium Concentration (µg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
Probability Plots
Appendix C
Probability Plots
MW-22
(100% Detected)
1.91 1.92 1.93 1.94 1.95 1.96 1.97 1.98
Log Cadmium Concentration (µg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-20
(100% Detected)
1.74 1.76 1.78 1.80 1.82 1.84 1.86
Log Chloride Concentration (mg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
1.72 1.74 1.76 1.78 1.80 1.82 1.84
Log Chloride Concentration (mg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.50
Log Cobalt Concentration (µg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
Probability Plots
Appendix C
Probability Plots
MW-22
(62.5% Detected)
4 6 8 101214161820
Censored Copper Concentration (µg/L)
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
Ex
p
e
c
t
e
d

N
o
r
m
a
l

V
a
l
u
e
MW-22
(62.5% Detected)
8 101214161820
Detected Copper Concentration (µg/L)
-1.4
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Ex
p
e
c
t
e
d

N
o
r
m
a
l

V
a
l
u
e
MW-20
(100% Detected)
-0.64 -0.62 -0.60 -0.58 -0.56 -0.54 -0.52 -0.50 -0.48 -0.46
Log Fluoride Concentration (mg/L)
-1.6
-1.4
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
0.44 0.45 0.46 0.47 0.48 0.49 0.50 0.51 0.52
Log Fluoride Concentration (mg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
Probability Plots
Appendix C
Probability Plots
MW-20
(75% Detected)
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2
Censored Gross Alpha minus Rn&U Concentration (pCi/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

N
o
r
m
a
l

V
a
l
u
e
MW-20
(75% Detected)
0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2
Detected Gross Alpha minus Rn&U Concentration (µg/L)
-1.4
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Ex
p
e
c
t
e
d

N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80
Log Gross Alpha minus Rn & U Concentration (pCi/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
Probability Plots
Appendix C
Probability Plots
MW-20
(100% Detected)
1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
Log Mangangese Concentration (µg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
4.46 4.47 4.48 4.49 4.50 4.51 4.52 4.53
Log Manganese Concentration (µg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9
Log Molybdenum Concentration (µg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17
Log Nickel Concentration (µg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
Probability Plots
Appendix C
Probability Plots
MW-20
(100% Detected)
0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85
Log Nitrate+Nitrate as N Concentration (mg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
0.42 0.44 0.46 0.48 0.50 0.52 0.54 0.56 0.58 0.60
Log Nitrate+Nitrite as N Concentration (mg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-20
0.850 0.852 0.854 0.856 0.858 0.860 0.862 0.864 0.866 0.868 0.870 0.872
Log pH concentration (s.u.)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-20
0.74 0.75 0.76 0.77 0.78 0.79 0.80
Log pH concentration (s.u.)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
Probability Plots
Appendix C
Probability Plots
MW-22
(100% Detected)
0.96 0.98 1.00 1.02 1.04 1.06 1.08 1.10 1.12 1.14 1.16 1.18 1.20
Log Selenium Concentration (µg/L)
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
3.69 3.70 3.71 3.72 3.73 3.74 3.75 3.76 3.77 3.78
Log Sulfate Concentraion (mg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
3.83 3.84 3.85 3.86 3.87 3.88 3.89 3.90 3.91
Log TDS Concentration (mg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
Probability Plots
Appendix C
Probability Plots
MW-20
(100% Detected)
0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6
Log Uranium Concentration (µg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
1.63 1.64 1.65 1.66 1.67 1.68 1.69 1.70 1.71 1.72 1.73
Log Uranium Concentration (µg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-20
(100% Detected)
1.4 1.5 1.6 1.7 1.8 1.9 2.0
Log Zinc Concentration (µg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
MW-22
(100% Detected)
2.64 2.66 2.68 2.70 2.72 2.74 2.76 2.78 2.80
Log Zinc Concentration (µg/L)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
Ex
p
e
c
t
e
d

L
o
g
-
N
o
r
m
a
l

V
a
l
u
e
Probability Plots
Appendix C
Probability Plots

Appendix D
Histograms
Exploratory Statistics Substituting Half the MDL
for Non-detected Values
MW-22
0.34 0.36 0.38 0.40 0.42 0.44 0.46 0.48 0.50 0.52
Beryllium (µg/L)
0
1
2
3
4
No

o
f

o
b
s
MW-22
1.90 1.91 1.92 1.93 1.94 1.95 1.96 1.97 1.98 1.99
Cadmium (µg/L)
0
1
2
3
4
5
No

o
f

o
b
s
MW-20
1.74 1.75 1.76 1.77 1.78 1.79 1.80 1.81 1.82 1.83 1.84 1.85 1.86 1.87
Chloride (mg/L)
0
1
2
3
No

o
f

o
b
s
MW-22
1.72 1.73 1.74 1.75 1.76 1.77 1.78 1.79 1.80 1.81 1.82 1.83 1.84
Chloride (mg/L)
0
1
2
3
No

o
f

o
b
s
Appendix D
Histograms
Histograms
MW-22
2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.50 2.51
Cobalt (µg/L)
0
1
2
3
4
No

o
f

o
b
s
MW-22
0.95 1.00 1.05 1.10 1.15 1.20 1.25 1.30 1.35
Copper (µg/L)
0
1
2
3
4
5
No

o
f

o
b
s
MW-20
-0.64 -0.62 -0.60 -0.58 -0.56 -0.54 -0.52 -0.50 -0.48 -0.46
Fluoride (mg/L)
0
1
2
3
4
No

o
f

o
b
s
MW-22
0.43 0.44 0.45 0.46 0.47 0.48 0.49 0.50 0.51 0.52
Fluoride (mg/L)
0
1
2
3
4
No

o
f

o
b
s
Appendix D
Histograms
Histograms
MW-20
-0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 0.4
Gross Alpha Minus Rn & U (pCi/L)
0
1
2
3
No

o
f

o
b
s
MW-22
0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80
Gross Alpha Minus Rn & U (pCi/L)
0
1
2
3
4
5
No

o
f

o
b
s
MW-20
1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
Manganese (µg/L)
0
1
2
3
No

o
f

o
b
s
MW-22
4.46 4.47 4.48 4.49 4.50 4.51 4.52 4.53
Manganese (µg/L)
0
1
2
3
No

o
f

o
b
s
Appendix D
Histograms
Histograms
MW-22
2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9
Molybdenum (µg/L)
0
1
2
3
4
5
No

o
f

o
b
s
MW-22
2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17
Nickel (µg/L)
0
1
2
3
No

o
f

o
b
s
MW-20
-1.5 -1.4 -1.3 -1.2 -1.1 -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0.0
Nitrogen, Ammonia as N (mg/L)
0
1
2
3
No

o
f

o
b
s
MW-22
-0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0.0
Nitrogen, Ammonia as N (mg/L)
0
1
2
3
4
5
No

o
f

o
b
s
Appendix D
Histograms
Histograms
MW-20
0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90
Nitrogen, Nitrate + Nitrite as N (mg/L)
0
1
2
3
4
No

o
f

o
b
s
MW-22
0.40 0.42 0.44 0.46 0.48 0.50 0.52 0.54 0.56 0.58 0.60 0.62
Nitrogen, Nitrate + Nitrite as N (mg/L)
0
1
2
3
No

o
f

o
b
s
MW-20
0.850 0.854 0.858 0.862 0.866 0.870 0.874
pH (s.u.)
0
1
2
3
4
No

o
f

o
b
s
MW-22
0.73 0.74 0.75 0.76 0.77 0.78 0.79 0.80
pH (s.u)
0
1
2
3
4
No

o
f

o
b
s
Appendix D
Histograms
Histograms
MW-22
0.96 0.98 1.00 1.02 1.04 1.06 1.08 1.10 1.12 1.14 1.16 1.18 1.20 1.22
Selenium (µg/L)
0
1
2
3
No

o
f

o
b
s
MW-22
3.69 3.70 3.71 3.72 3.73 3.74 3.75 3.76 3.77 3.78
Sulfate (mg/L)
0
1
2
3
4
No

o
f

o
b
s
MW-22
3.83 3.84 3.85 3.86 3.87 3.88 3.89 3.90 3.91
TDS (mg/L)
0
1
2
3
4
No

o
f

o
b
s
Appendix D
Histograms
Histograms
MW-20
0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6
Uranium (µg/L)
0
1
2
3
4
No

o
f

o
b
s
MW-22
1.63 1.64 1.65 1.66 1.67 1.68 1.69 1.70 1.71 1.72 1.73
Uranium (µg/L)
0
1
2
3
4
No

o
f

o
b
s
MW-20
1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1
Zinc (µg/L)
0
1
2
3
4
No

o
f

o
b
s
MW-22
2.64 2.65 2.66 2.67 2.68 2.69 2.70 2.71 2.72 2.73 2.74 2.75 2.76 2.77 2.78 2.79 2.80
Zinc (µg/L)
0
1
2
3
No

o
f

o
b
s
Appendix D
Histograms
Histograms

Appendix E
Data that have Been Removed or Modified
Prior to Statistical Analyses

Appendix E
Data Removed Prior to Statistical Analysis
Reason Well Sample Date Sample ID Sample ID No. Matrix Method Method Name Chemical Result Qual NDCount Units Det Lim Sample Received Analyzed Date
Extreme Value MW‐20 11/12/2008 C08110568 9 Aqueous E200.8 7440‐43‐9 Cadmium 200.7.8‐W‐D Cadmium 1.05 µg/L 0.5 11/14/2008 11/20/2008
Less than 8 value MW‐20 6/17/2008 C08061004 6 Aqueous E200.8 7440‐43‐9 Cadmium 200.7.8‐W‐D Cadmium 0.5 U U µg/L 0.5 6/20/2008 7/17/2008
Less than 8 value MW‐20 8/11/2008 C08080664 13 Aqueous E200.8 7440‐43‐9 Cadmium 200.7.8‐W‐D Cadmium 0.5 U U µg/L 0.5 8/15/2008 9/5/2008
Less than 8 value MW‐20 2/2/2009 C09020234 1 Aqueous E200.8 7440‐43‐9 Cadmium 200.7.8‐W‐D Cadmium 0.5 U U µg/L 0.5 2/5/2009 2/7/2009
Less than 8 value MW‐20 5/14/2009 C09050510 1 Aqueous E200.8 7440‐43‐9 Cadmium 200.7.8‐W‐D Cadmium 0.5 U U µg/L 0.5 5/15/2009 5/18/2009
Less than 8 value MW‐20 8/31/2009 C09090094 6 Aqueous E200.8 7440‐43‐9 Cadmium 200.7.8‐W‐D Cadmium 0.5 U U µg/L 0.5 9/1/2009 9/4/2009
Less than 8 value MW‐20 10/28/2009 C09101105 3 Aqueous E200.8 7440‐43‐9 Cadmium 200.7.8‐W‐D Cadmium 0.5 U U µg/L 0.5 10/29/2009 10/30/2009
Less than 8 value MW‐20 2/11/2010 C10020458 2 Aqueous E200.8 7440‐43‐9 Cadmium 200.7.8‐W‐D Cadmium 0.5 U U µg/L 0.5 2/12/2010 2/16/2010
Extreme Value MW‐22 2/8/2010 C10020458 3 Aqueous E200.8 7439‐97‐6 Mercury 200.7.8‐W‐D Mercury 0.56 µg/L 0.5 2/12/2010 2/16/2010
Less than 8 value MW‐22 6/17/2008 C08061004 7 Aqueous E200.8 7439‐97‐6 Mercury 200.7.8‐W‐D Mercury 0.5 U U µg/L 0.5 6/20/2008 7/17/2008
Less than 8 value MW‐22 8/11/2008 C08080664 14 Aqueous E200.8 7439‐97‐6 Mercury 200.7.8‐W‐D Mercury 0.5 U U µg/L 0.5 8/15/2008 9/5/2008
Less than 8 value MW‐22 11/12/2008 C08110568 10 Aqueous E200.8 7439‐97‐6 Mercury 200.7.8‐W‐D Mercury 0.5 U U µg/L 0.5 11/14/2008 11/20/2008
Less than 8 value MW‐22 2/2/2009 C09020234 2 Aqueous E200.8 7439‐97‐6 Mercury 200.7.8‐W‐D Mercury 0.5 U U µg/L 0.5 2/5/2009 2/18/2009
Less than 8 value MW‐22 5/14/2009 C09050510 2 Aqueous E200.8 7439‐97‐6 Mercury 200.7.8‐W‐D Mercury 0.5 U U µg/L 0.5 5/15/2009 5/18/2009
Less than 8 value MW‐22 8/31/2009 C09090094 7 Aqueous E200.8 7439‐97‐6 Mercury 200.7.8‐W‐D Mercury 0.5 U U µg/L 0.5 9/1/2009 9/4/2009
Less than 8 value MW‐22 10/27/2009 C09101105 4 Aqueous E200.8 7439‐97‐6 Mercury 200.7.8‐W‐D Mercury 0.5 U U µg/L 0.5 10/29/2009 10/30/2009
Less than 8 value MW‐20 6/17/2008 C08061004 6 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 6/20/2008 6/23/2008
Less than 8 value MW‐20 8/11/2008 C08080664 13 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 8/15/2008 8/23/2008
Less than 8 value MW‐20 11/12/2008 C08110568 9 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 11/14/2008 11/17/2008
Less than 8 value MW‐20 2/2/2009 C09020234 1 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 2/5/2009 2/6/2009
Less than 8 value MW‐20 5/14/2009 C09050510 1 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 5/15/2009 5/18/2009
Less than 8 value MW‐20 8/26/2009 C09090094 1 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 9/1/2009 9/9/2009
Less than 8 value MW‐20 10/28/2009 C09101105 3 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 10/29/2009 10/31/2009
Less than 8 value MW‐22 6/17/2008 C08061004 7 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 6/20/2008 6/28/2008
Less than 8 value MW‐22 8/11/2008 C08080664 14 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 8/15/2008 8/23/2008
Less than 8 value MW‐22 11/12/2008 C08110568 10 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 11/14/2008 11/17/2008
Less than 8 value MW‐22 2/2/2009 C09020234 2 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 2/5/2009 2/6/2009
Less than 8 value MW‐22 5/14/2009 C09050510 2 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 5/15/2009 5/18/2009
Less than 8 value MW‐22 8/26/2009 C09090094 2 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 9/1/2009 9/9/2009
Less than 8 value MW‐22 10/27/2009 C09101105 4 Aqueous SW8260B 75‐09‐2 Methylene chloride VOC‐8260Methylene chlo 1 U U µg/L 1 10/29/2009 10/31/2009
Extreme Value MW‐20 8/11/2008 C08080664 13 Aqueous E200.8 7439‐98‐7 Molybdenum 200.7.8‐W‐D Molybdenum 11 µg/L 10 8/15/2008 9/5/2008
Less than 8 value MW‐20 6/17/2008 C08061004 6 Aqueous E200.8 7439‐98‐7 Molybdenum 200.7.8‐W‐D Molybdenum 10 U U µg/L 10 6/20/2008 7/17/2008
Less than 8 value MW‐20 11/12/2008 C08110568 9 Aqueous E200.8 7439‐98‐7 Molybdenum 200.7.8‐W‐D Molybdenum 10 U U µg/L 10 11/14/2008 11/20/2008
Less than 8 value MW‐20 2/2/2009 C09020234 1 Aqueous E200.8 7439‐98‐7 Molybdenum 200.7.8‐W‐D Molybdenum 10 U U µg/L 10 2/5/2009 2/7/2009
Less than 8 value MW‐20 5/14/2009 C09050510 1 Aqueous E200.8 7439‐98‐7 Molybdenum 200.7.8‐W‐D Molybdenum 10 U U µg/L 10 5/15/2009 5/18/2009
Less than 8 value MW‐20 8/31/2009 C09090094 6 Aqueous E200.8 7439‐98‐7 Molybdenum 200.7.8‐W‐D Molybdenum 10 U U µg/L 10 9/1/2009 9/4/2009
Less than 8 value MW‐20 10/28/2009 C09101105 3 Aqueous E200.8 7439‐98‐7 Molybdenum 200.7.8‐W‐D Molybdenum 10 U U µg/L 10 10/29/2009 10/30/2009
Less than 8 value MW‐20 2/11/2010 C10020458 2 Aqueous E200.8 7439‐98‐7 Molybdenum 200.7.8‐W‐D Molybdenum 10 U U µg/L 10 2/12/2010 2/16/2010
Extreme Value MW‐20 6/17/2008 C08061004 6 Aqueous A4500‐H BPH pH pH‐WpH7.35 s.u. 0.01 6/20/2008 6/23/2008
Less than 8 value MW‐20 8/11/2008 C08080664 13 Aqueous A4500‐H BPH pH pH‐W pH 7.37 s.u. 0.01 8/15/2008 8/16/2008
Less than 8 value MW‐20 11/12/2008 C08110568 9 Aqueous A4500‐H BPH pH pH‐W pH 7.65 s.u. 0.01 11/14/2008 11/17/2008
Less than 8 value MW‐20 2/2/2009 C09020234 1 Aqueous A4500‐H BPH pH pH‐W pH 7.58 s.u. 0.01 2/5/2009 2/5/2009
Less than 8 value MW‐20 5/14/2009 C09050510 1 Aqueous A4500‐H BPH pH pH‐W pH 7.72 s.u. 0.01 5/15/2009 5/18/2009
Less than 8 value MW‐20 8/31/2009 C09090094 6 Aqueous A4500‐H BPH pH pH‐W pH 7.63 s.u. 0.01 9/1/2009 9/2/2009
Less than 8 value MW‐20 10/28/2009 C09101105 3 Aqueous A4500‐H BPH pH pH‐W pH 7.65 s.u. 0.01 10/29/2009 10/30/2009
Less than 8 value MW‐20 2/11/2010 C10020458 2 Aqueous A4500‐H BPH pH pH‐W pH 7.6 s.u. 0.01 2/12/2010 2/12/2010
Extreme Value MW‐22 8/31/2009 C09090094 7 Aqueous A4500‐H BPH pH pH‐WpH7.04 s.u. 0.01 9/1/2009 9/2/2009
Extreme Value MW‐22 10/27/2009 C09101105 4 Aqueous A4500‐H BPH pH pH‐WpH7.22 s.u. 0.01 10/29/2009 10/30/2009
Less than 8 value MW‐22 6/17/2008 C08061004 7 Aqueous A4500‐H BPH pH pH‐W pH 6.2 s.u. 0.01 6/20/2008 6/23/2008
Less than 8 value MW‐22 8/11/2008 C08080664 14 Aqueous A4500‐H BPH pH pH‐W pH 6.27 s.u. 0.01 8/15/2008 8/16/2008
Less than 8 value MW‐22 11/12/2008 C08110568 10 Aqueous A4500‐H BPH pH pH‐W pH 6.26 s.u. 0.01 11/14/2008 11/17/2008
Less than 8 value MW‐22 2/2/2009 C09020234 2 Aqueous A4500‐H BPH pH pH‐W pH 6.23 s.u. 0.01 2/5/2009 2/5/2009
Less than 8 value MW‐22 5/14/2009 C09050510 2 Aqueous A4500‐H BPH pH pH‐W pH 6.33 s.u. 0.01 5/15/2009 5/18/2009
Page 1 of 2
Appendix E
Data Removed Prior to Statistical Analysis
Reason Well Sample Date Sample ID Sample ID No. Matrix Method Method Name Chemical Result Qual NDCount Units Det Lim Sample Received Analyzed Date
Less than 8 value MW‐22 2/8/2010 C10020458 3 Aqueous A4500‐H BPH pH pH‐W pH 6.42 s.u. 0.01 2/12/2010 2/12/2010
Anomolous valueMW‐20 2/11/2010 C10020458 2 Aqueous A2540 C TDS‐Calc Solids, Total Dissolved TDS @ 1TDS 5150 D mg/L 20 2/12/2010 2/12/2010
Less than 8 value MW‐20 6/17/2008 C08061004 6 Aqueous A2540 C TDS‐Calc Solids, Total Dissolved TDS @ 1TDS 5570 mg/L 10 6/20/2008 6/23/2008
Less than 8 value MW‐20 8/11/2008 C08080664 13 Aqueous A2540 C TDS‐Calc Solids, Total Dissolved TDS @ 1TDS 5650 mg/L 10 8/15/2008 8/16/2008
Less than 8 value MW‐20 11/12/2008 C08110568 9 Aqueous A2540 C TDS‐Calc Solids, Total Dissolved TDS @ 1TDS 5690 mg/L 10 11/14/2008 11/17/2008
Less than 8 value MW‐20 2/2/2009 C09020234 1 Aqueous A2540 C TDS‐Calc Solids, Total Dissolved TDS @ 1TDS 5780 mg/L 10 2/5/2009 2/6/2009
Less than 8 value MW‐20 5/14/2009 C09050510 1 Aqueous A2540 C TDS‐Calc Solids, Total Dissolved TDS @ 1TDS 5820 mg/L 10 5/15/2009 5/19/2009
Less than 8 value MW‐20 8/31/2009 C09090094 6 Aqueous A2540 C TDS‐Calc Solids, Total Dissolved TDS @ 1TDS 5640 mg/L 10 9/1/2009 9/3/2009
Less than 8 value MW‐20 10/28/2009 C09101105 3 Aqueous A2540 C TDS‐Calc Solids, Total Dissolved TDS @ 1TDS 5490 mg/L 10 10/29/2009 10/30/2009
Anomolous valueMW‐20 2/11/2010 C10020458 2 Aqueous A4500‐SO4 14808‐79‐8Sulfate SO4‐TURB‐W Sulfate 4130 D mg/L 60 2/12/2010 3/3/2010
Less than 8 value MW‐20 6/17/2008 C08061004 6 Aqueous A4500‐SO4 14808‐79‐8Sulfate SO4‐TURB‐W Sulfate 3880 D mg/L 60 6/20/2008 6/25/2008
Less than 8 value MW‐20 8/11/2008 C08080664 13 Aqueous A4500‐SO4 14808‐79‐8Sulfate SO4‐TURB‐W Sulfate 3910 D mg/L 100 8/15/2008 8/21/2008
Less than 8 value MW‐20 11/12/2008 C08110568 9 Aqueous A4500‐SO4 14808‐79‐8Sulfate SO4‐TURB‐W Sulfate 3720 D mg/L 30 11/14/2008 11/24/2008
Less than 8 value MW‐20 2/2/2009 C09020234 1 Aqueous A4500‐SO4 14808‐79‐8Sulfate SO4‐TURB‐W Sulfate 3600 D mg/L 30 2/5/2009 2/9/2009
Less than 8 value MW‐20 5/14/2009 C09050510 1 Aqueous A4500‐SO4 14808‐79‐8Sulfate SO4‐TURB‐W Sulfate 3910 D mg/L 60 5/15/2009 5/19/2009
Less than 8 value MW‐20 8/31/2009 C09090094 6 Aqueous A4500‐SO4 14808‐79‐8Sulfate SO4‐TURB‐W Sulfate 3760 D mg/L 30 9/1/2009 9/16/2009
Less than 8 value MW‐20 10/28/2009 C09101105 3 Aqueous A4500‐SO4 14808‐79‐8Sulfate SO4‐TURB‐W Sulfate 3990 D mg/L 60 10/29/2009 10/30/2009
Less than 8 value MW‐20 6/17/2008 L84663 06A Aqueous 109‐99‐9 8260‐W‐Cu Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 6/24/2008
Less than 8 value MW‐20 8/11/2008 L85732 04A Aqueous 109‐99‐9 8260‐W‐Cu Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 8/18/2008
Less than 8 value MW‐20 11/12/2008 L87554 09A Aqueous 109‐99‐9 8260‐W‐Cu Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 11/22/2008
Less than 8 value MW‐20 2/2/2009 L88809 01A Aqueous 109‐99‐9 8260‐W‐Cu Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 2/12/2009
Less than 8 value MW‐20 5/14/2009 905253 001A Aqueous 109‐99‐9 8260‐W Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 5/18/2009
Less than 8 value MW‐20 8/26/2009 908550 002A Aqueous 109‐99‐9 8260‐W Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 8/31/2009
Less than 8 value MW‐20 10/28/2009 910544 003A Aqueous 109‐99‐9 8260‐W Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 10/30/2009
Less than 8 value MW‐22 6/17/2008 L84663 07A Aqueous 109‐99‐9 8260‐W‐Cu Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 6/24/2008
Less than 8 value MW‐22 8/11/2008 L85732 05A Aqueous 109‐99‐9 8260‐W‐Cu Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 8/18/2008
Less than 8 value MW‐22 11/12/2008 L87554 10A Aqueous 109‐99‐9 8260‐W‐Cu Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 11/22/2008
Less than 8 value MW‐22 2/2/2009 L88809 02A Aqueous 109‐99‐9 8260‐W‐Cu Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 2/12/2009
Less than 8 value MW‐22 5/14/2009 905253 002A Aqueous 109‐99‐9 8260‐W Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 5/18/2009
Less than 8 value MW‐22 8/26/2009 908550 003A Aqueous 109‐99‐9 8260‐W Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 8/31/2009
Less than 8 value MW‐22 10/27/2009 910544 004A Aqueous 109‐99‐9 8260‐W Tetrahydrofuran Tetrahydrofuran 2 U U µg/L 2 10/30/2009
Extreme Value MW‐20 11/12/2008 C08110568 9 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 1.14 µg/L 0.5 11/14/2008 11/20/2008
Less than 8 value MW‐20 6/17/2008 C08061004 6 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 0.54 µg/L 0.5 6/20/2008 7/17/2008
Less than 8 value MW‐20 8/11/2008 C08080664 13 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 0.5 U U µg/L 0.5 8/15/2008 9/5/2008
Less than 8 value MW‐20 2/2/2009 C09020234 1 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 0.5 U U µg/L 0.5 2/5/2009 2/7/2009
Less than 8 value MW‐20 5/14/2009 C09050510 1 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 0.5 U U µg/L 0.5 5/15/2009 5/18/2009
Less than 8 value MW‐20 8/31/2009 C09090094 6 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 0.5 U U µg/L 0.5 9/1/2009 9/4/2009
Less than 8 value MW‐20 10/28/2009 C09101105 3 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 0.5 U U µg/L 0.5 10/29/2009 10/30/2009
Less than 8 value MW‐20 2/11/2010 C10020458 2 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 0.58 µg/L 0.5 2/12/2010 2/16/2010
Extreme Value MW‐22 8/31/2009 C09090094 7 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 1.22 µg/L 0.5 9/1/2009 9/4/2009
Less than 8 value MW‐22 6/17/2008 C08061004 7 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 1.15 µg/L 0.5 6/20/2008 7/17/2008
Less than 8 value MW‐22 8/11/2008 C08080664 14 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 1.04 µg/L 0.5 8/15/2008 9/5/2008
Less than 8 value MW‐22 11/12/2008 C08110568 10 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 1.23 µg/L 0.5 11/14/2008 11/20/2008
Less than 8 value MW‐22 2/2/2009 C09020234 2 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 1.02 µg/L 0.5 2/5/2009 2/7/2009
Less than 8 value MW‐22 5/14/2009 C09050510 2 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 1.16 µg/L 0.5 5/15/2009 5/18/2009
Less than 8 value MW‐22 10/27/2009 C09101105 4 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 1.2 µg/L 0.5 10/29/2009 10/30/2009
Less than 8 value MW‐22 2/8/2010 C10020458 3 Aqueous E200.8 7440‐28‐0 Thallium 200.7.8‐W‐D Thallium 1.5 µg/L 0.5 2/12/2010 2/16/2010
Page 2 of 2

Appendix F
Statistica© Input and Output Files
(Electronic Only)

Appendix G
Hydraulic Testing at the White Mesa Uranium Mill
Near Blanding, Utah During July 2002
Hydro Geo Chem, Inc.

May 25, 2010

David Frydenlund, Esq.
Denison Mines (USA) Corporation
1050 17th Street, Suite 950
Denver, Colorado 80265

Dear Mr. Frydenlund,

This letter provides a response to Part 1 E.2 of the January 20, 2010 Utah Department of
Environmental Quality (UDEQ) letter to Denison Mines regarding the Revised Ground Water
Quality Discharge Permit at the White Mesa Uranium Mill site (the site). In particular, this letter
provides aquifer test results and calculations of groundwater pore velocities for perched monitoring
wells MW-20 and MW-22 as requested in the UDEQ letter. A discussion of the suitability of using
these wells as point of compliance (POC) wells is also provided.

Hydraulic Testing of MW-20 and MW-22

Hydraulic testing of MW-20 and MW-22 (Figure 1) was performed during July 2002 by
Hydro Geo Chem, Inc (HGC) personnel as described in HGC, 20021. Tests consisted of slug tests
analyzed using AQTESOLVE2 and WHIP3. Test results are summarized in Table 1. Appendix A
contains plots abstracted from HGC, 2002 that detail the various analyses. Estimated hydraulic
conductivities varied from 5.9 x 10-6 centimeters per second (cm/s) to 9.3 x 10-6 cm/s for MW-20,
and from 1.0 x 10-6 cm/s to 7.9 x 10-6 cm/s for MW-22, depending on the solution method. The
average of the estimates for MW-20 was 7.8 x 10-6 cm/s, and for MW-22 was 4.4 x 10-6 cm/s. These
averages will be used as described below to calculate perched groundwater pore velocities at these
wells.

Estimation of Groundwater Pore Velocities at MW-20 and MW-22

Table 2 summarizes perched groundwater pore velocity calculations at MW-20 and MW-22.
The method of calculation is substantially the same as described in HGC, 20054. The pathlines used

1 HGC. 2002. Hydraulic Testing at the White Mesa Uranium Mill Near Blanding, Utah During July 2002. Submitted to
International Uranium (USA) Corporation.
2 HydroSOLVE, Inc. 2000. AQTESOLVE For Windows. User’s Guide.
3 HGC. 1988. Well Hydraulics Interpretation Program (WHIP). Version 3.22 User’s Manual. July 1988.
4 HGC. 2005. Perched Monitoring Well Installation and Testing at the White Mesa Uranium Mill, April Through
June 2005. Submitted to International Uranium (USA) Corporation.

ATTACHMENTS

TABLES

1 Hydraulic Test Analysis Results for MW-20 and MW-22
2 Estimated Perched Zone Pore Velocities at MW-20 and MW-22

FIGURES

1 Site Plan and Perched Well Locations, White Mesa Site
2 Kriged 1st Quarter 2010 Water Levels Showing Pathlines for Gradient Calculations at
MW-20 and MW-22, White Mesa Site

APPENDIX

A Slug Test Results

TABLES
TABLE 1
Hydraulic Test Analysis Results for MW-20 and MW-22
Well ID Interpretation
Method Type
Hydraulic
Conductivity
(cm/sec)
Storativity Specific Storage
(1/foot)
Saturated
Thickness
(feet)
Skin
WHIP slug 8.2 x 10-6 0.02 -- 12 none
AQTESOLV
(Bouwer-Rice, Unconfined)slug 9.3 x 10-6 -- -- 12 --
AQTESOLV
(Bouwer-Rice, Unconfined)slug 5.9 x 10-6 -- -- 12 --
WHIP slug 4.2 x 10-6 0.014 -- 51 none
AQTESOLV
(KGS, Unconfined)slug 1.0 x 10-6 0.10 2.0 x 10-3 51 --
AQTESOLV
(Bouwer-Rice, Unconfined)slug 7.9 x 10-6 -- -- 51 --
AQTESOLV
(Bouwer-Rice, Unconfined)slug 4.4 x 10-6 -- -- 51 --
MW-20
MW-22
H:\718000\POC2010\MW20_and_MW22_Results.xls: Table 1 5/25/2010
TABLE 2
Estimated Perched Zone Pore Velocities
at MW-20 and MW-22
Pathline Head Change Hydraulic Gradient Pore Velocity
(cm/s) (ft/yr) (ft) (ft) ft/ft ft/yr
MW-20 7.80E-06 7.97E+00 1600 12 7.50E-03 0.33
MW-22 4.40E-06 4.50E+00 1150 20 1.74E-02 0.43
Notes:
aAverage of estimates.
Assumes effective porosity of 0.18
cm/s = Centimeters per second
ft/ft = Feet per foot
ft/yr = Feet per year
Well
Hydraulic Conductivitya
H:\718000\POC2010\MW20_and_MW22_velocity.xls: Table 2 5/25/2010

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

3000
BOUNDARY
PROPERTY
SCALE IN FEET
0
CELL NO. 1
MILL SITE
MW-01
MW-02
MW-03
MW-05
MW-11
MW-12
MW-14
MW-15
MW-16
MW-17
MW-18
MW-19
MW-20
MW-22
MW-23
MW-24
MW-25
MW-27
MW-28
MW-29
MW-30
MW-31
MW-32
PIEZ-1
PIEZ-2
PIEZ-3
PIEZ-4
PIEZ-5
MW-26
TW4-1
TW4-2
TW4-3
TW4-4
TW4-5
TW4-6
TW4-9
TW4-11
TW4-12
TW4-13
TW4-14
TW4-16
TW4-18
TW4-20
TW4-21
MW-04TW4-7 TW4-8
TW4-10
TW4-22
TW4-19
TW4-23
TW4-24
TW4-25
TWN-1
TWN-2
TWN-3
TWN-4
TWN-5
TWN-6
TWN-7
TWN-8
TWN-9
TWN-10
TWN-11 TWN-12
TWN-13
TWN-14
TWN-15
TWN-16
TWN-17
TWN-18
TWN-19
(abandoned)
MW-20
PIEZ-1
perched monitoring well
temporary perched monitoring
well installed April, 2005
perched piezometer
MW-31
temporary perched monitoring well
perched monitoring well
installed April, 2005
SITE PLAN
AND PERCHED WELL LOCATIONS
WHITE MESA SITE
H:/718000/POC2010/welloc.srf
TW4-19
TW4-20
EXPLANATION
temporary perched monitoring well
installed May, 2007
TW4-23
wildlife pond
SJS
temporary perched nitrate
monitoring well
TWN-1
15/25/10
HYDRO
GEO
CHEM, INC.APPROVED DATE REFERENCE FIGURE
3332
3000
SCALE IN FEET
0
5582
5503
5472
5503
5521
5501
5494
5494
5499
5587
5604
5458
5450
5498
5507
5537
5577
5543
5512
5538
5547 5557
5558
5584
5546
5586
5538
5584
5578
5565
5586
5572
5523
5544
5560
5548
558555715564
5583
5574
5593
5612
5602
5543
5541
MW-01
MW-02
MW-03
MW-05
MW-11
MW-12
MW-14
MW-15
MW-17
MW-18
MW-19
MW-20
MW-22
MW-23
MW-24
MW-25
MW-27
MW-28
MW-29
MW-30
MW-31

MW-26

MW-32
TW4-19

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

TWN-3
TWN-4
TWN-5
TWN-6
TWN-7
TWN-8
TWN-9
TWN-10
TWN-11 TWN-12
TWN-13
TWN-14
TWN-15
TWN-16
TWN-17
TWN-18
TWN-19
5603
5605
5585
5590
5560
5590
5583
5585
5615 5630
5587
5587
5584
5604
5606
5587
5607
5601
5612
TWN-1
TWN-2
TW4-20
TW4-4
MW-22
PIEZ-1
5450
5593
perched monitoring well showing
elevation in feet amsl
temporary perched monitoring well installed
April, 2005 showing elevation in feet amsl
perched piezometer showing
elevation in feet amsl
5557
MW-31
5547
temporary perched monitoring well
showing elevation in feet amsl
5574
perched monitoring well installed April, 2005
showing elevation in feet amsl
EXPLANATION
temporary perched monitoring well installed
May, 2007 showing elevation in feet amsl5541 SJS
temporary perched nitrate
monitoring well showing
elevation in feet amsl
TWN-4
5605
NOTE: MW-4, MW-26, TW4-4, TW4-19 and TW4-20 are pumping wells
KRIGED 1st QUARTER, 2010 WATER LEVELS
SHOWING PATHLINES FOR GRADIENT CALCULATIONS
AT MW-20 AND MW-22
WHITE MESA SITE
H:/718000/poc2010/mw20path.srf 2
pathline for hydraulic
gradient calculation
5/25/10

APPENDIX A

SLUG TEST RESULTS

Approved Date Reference Figure
HYDRO
GEO
CHEM, INC.
TEST RESULTS
T= 0.276 ft2/day
S= 0.02
Re= 0.213 ft
K= 8.2e-6 cm/sec
(assuming b= 12 ft)
MW-20 SLUG TEST RESULTS
(interpretation using WHIP)
h:/718000/
poc2010/mw20.srf
0. 4. 8. 12. 16. 20.
0.1
1.
10.
Time (min)
Di
s
p
l
a
c
e
m
e
n
t

(
f
t
)
WELL TEST ANALYSIS
Data Set: H:\718000\hydtst02\aqtesolv\mw20br.aqt
Date: 02/10/10 Time: 10:24:10
PROJECT INFORMATION
Client: iuc
Test Well: mw20
AQUIFER DATA
Saturated Thickness: 12. ft Anisotropy Ratio (Kz/Kr): 1.
WELL DATA (mw20)
Initial Displacement: 1.06 ft Static Water Column Height: 12. ft
Total Well Penetration Depth: 12. ft Screen Length: 12. ft
Casing Radius: 0.167 ft Well Radius: 0.328 ft
Gravel Pack Porosity: 0.3
SOLUTION
Aquifer Model: Unconfined Solution Method: Bouwer-Rice
K = 9.31E-6 cm/sec y0 = 0.6583 ft
0. 4. 8. 12. 16. 20.
0.1
1.
10.
Time (min)
Di
s
p
l
a
c
e
m
e
n
t

(
f
t
)
WELL TEST ANALYSIS
Data Set: H:\718000\hydtst02\aqtesolv\mw20brnc.aqt
Date: 02/10/10 Time: 10:26:23
PROJECT INFORMATION
Client: iuc
Test Well: mw20
AQUIFER DATA
Saturated Thickness: 12. ft Anisotropy Ratio (Kz/Kr): 1.
WELL DATA (mw20)
Initial Displacement: 1.06 ft Static Water Column Height: 12. ft
Total Well Penetration Depth: 12. ft Screen Length: 12. ft
Casing Radius: 0.167 ft Well Radius: 0.328 ft
SOLUTION
Aquifer Model: Unconfined Solution Method: Bouwer-Rice
K = 5.874E-6 cm/sec y0 = 0.6583 ft
Approved Date Reference Figure
HYDRO
GEO
CHEM, INC.
TEST RESULTS
T= 0.603 ft2/day
S= 0.014
Re= 0.183 ft
K= 4.2e-6 cm/sec
(assuming b= 51 ft)
MW-22 SLUG TEST RESULTS
(interpretation using WHIP)
h:/718000/poc2010/
whip/mw22b.srf
0.1 1. 10. 100.
0.
0.4
0.8
1.2
1.6
2.
Time (min)
Di
s
p
l
a
c
e
m
e
n
t

(
f
t
)
WELL TEST ANALYSIS
Data Set: H:\718000\hydtst02\aqtesolv\mw22.aqt
Date: 02/10/10 Time: 10:26:52
PROJECT INFORMATION
Client: iuc
Test Well: mw22
AQUIFER DATA
Saturated Thickness: 51. ft
WELL DATA (mw22)
Initial Displacement: 1.01 ft Static Water Column Height: 51. ft
Total Well Penetration Depth: 51. ft Screen Length: 51. ft
Casing Radius: 0.167 ft Well Radius: 0.328 ft
SOLUTION
Aquifer Model: Unconfined Solution Method: KGS Model
Kr = 1.04E-6 cm/sec Ss = 0.001939 ft-1
Kz/Kr = 1.
0. 20. 40. 60. 80. 100.
0.1
1.
10.
Time (min)
Di
s
p
l
a
c
e
m
e
n
t

(
f
t
)
WELL TEST ANALYSIS
Data Set: H:\718000\hydtst02\aqtesolv\mw22br.aqt
Date: 02/10/10 Time: 10:27:26
PROJECT INFORMATION
Client: iuc
Test Well: mw22
AQUIFER DATA
Saturated Thickness: 51. ft Anisotropy Ratio (Kz/Kr): 1.
WELL DATA (mw22)
Initial Displacement: 1.01 ft Static Water Column Height: 51. ft
Total Well Penetration Depth: 51. ft Screen Length: 51. ft
Casing Radius: 0.167 ft Well Radius: 0.328 ft
Gravel Pack Porosity: 0.3
SOLUTION
Aquifer Model: Unconfined Solution Method: Bouwer-Rice
K = 7.919E-6 cm/sec y0 = 0.8 ft
0. 20. 40. 60. 80. 100.
0.1
1.
10.
Time (min)
Di
s
p
l
a
c
e
m
e
n
t

(
f
t
)
WELL TEST ANALYSIS
Data Set: H:\718000\hydtst02\aqtesolv\mw22brnc.aqt
Date: 02/10/10 Time: 10:27:10
PROJECT INFORMATION
Client: iuc
Test Well: mw22
AQUIFER DATA
Saturated Thickness: 51. ft Anisotropy Ratio (Kz/Kr): 1.
WELL DATA (mw22)
Initial Displacement: 1.01 ft Static Water Column Height: 51. ft
Total Well Penetration Depth: 51. ft Screen Length: 51. ft
Casing Radius: 0.167 ft Well Radius: 0.328 ft
SOLUTION
Aquifer Model: Unconfined Solution Method: Bouwer-Rice
K = 4.352E-6 cm/sec y0 = 0.8 ft