DRC-2024-005515

(•~I. I y--rr ~t£' ~ ,./ __ ENERGY FUELS
April 29, 2024
Div of Waste Mc:::r,dg~• • n~
and Radiation Control
MAY O 2 2024
Sent VIA EXPEDITED DELIVERY
ML Doug Hansen
Director
Division of Waste Management and Radiation Control
Utah Department of Environmental Quality
195 North 1950 West
Salt Lake City, UT 84116
Re: Transmittal of 1st Quarter 2024 Nitrate Monitoring Report
Energy Fuels Resources (USA) Inc.
225 Union Blvd. Suite 600
Lakewood, CO, US, 80228
303 974 2140
www.enernvfuels.com
Stipulation and Consent Order Docket Number UGW12-04 White Mesa Uranium Mill
Dear Mr. Hansen:
Enclosed are two copies of the White Mesa Uranium Mill Nitrate Monitoring Report for the 1st Quarter
of 2024 as required by the Stipulation and -Consent Order Docket Number UGW12-04, as well as two
CDs each containing a word searchable electronic copy of the report.
If you should have any questions regarding this report, please contact me or Jordan App at
[phone].
Yours very truly ,
ENERGY FUELS RESOURCES (USA) INC .
Kathy Weinel
Director, Regulatory Compliance
cc : David Frydenlund
Logan Shumway
Garrin Palmer
Scott Bakken
Jordan App
Dawn Kolkman
DRC-2024-005515
April 29, 2024
Sent VIA EXPEDITED DELIVERY
Mr. Doug Hansen
Director
Division of Waste Management and Radiation Control
Utah Department of Environmental Quality
195 North 1950 West
Salt Lake City, UT 84116
Re: Transmittal of 1st Quarter 2024 Nitrate Monitoring Report
Energy Fuels Resources (USA) Inc.
225 Union Blvd. Suite 600
Lakewood, CO, US, 80228
303 974 2140
www .enernyfuels.com
Stipulation and Consent Order Docket Number UGW12-04 White Mesa Uranium Mill
Dear Mr. Hansen:
Enclosed are two copies of the White Mesa Uranium Mill Nitrate Monitoring Report for the 1st Quarter
of 2024 as required by the Stipulation and Consent Order Docket Number UGW12-04, as well as two
CDs each containing a word searchable electronic copy of the report.
If you should have any questions regarding this report, please contact me or Jordan App at
[phone].
Yours very truly,
ENERGY FUELS RESOURCES (USA) INC.
Kathy Weinel
Director, Regulatory Compliance
cc : David Frydenlund
Logan Shumway
Garrin Palmer
Scott Bakken
Jordan App
Dawn Kolkman
White Mesa Uranium Mill
Nitrate Monitoring Report
State of Utah
Stipulated Consent Agreement, December 2014
Docket No. UGW12-04
1st Quarter
(January thru March)
2024
Prepared by:
?:,,~
----~~j "T:NERGYFUELS
Energy Fuels Resources (USA) Inc.
225 Union Boulevard, Suite 600
Lakewood, CO 80228
April 29, 2024
TABLE OF CONTENTS
1.0 INTRODUCTION ................................................................................................. 1
2.0 GROUNDWATER NITRATE MONITORING ................................................. 1
2.1 Samples and Measurements Taken During the Quarter ...................................... 1
2.1.1 Nitrate Monitoring ...................................................................................... .2
2.1.2 Parameters Analyzed ................................................................................... 3
2.1.3 Groundwater Head and Level Monitoring ................................................... 3
2.2 Sampling Methodology and Equipment and Decontamination Procedures ....... .4
2.2.1 Well Purging, Sampling and Depth to Groundwater. ................................. .4
2.2.2 Piezometer Sampling ................................................................................... 5
2.3 Field Data ............................................................................................................. 5
2.4 Depth to Groundwater Data and Water Table Contour Map ............................... 5
2.5 Laboratory Results ............................................................................................... 5
2.5.1 Copy of Laboratory Results ......................................................................... 5
2.5.2 Regulatory Framework ................................................................................ 6
3.0 QUALITY ASSURANCE AND DATA VALIDATION .................................... 6
3.1 Field QC Samples ................................................................................................ 6
3.2 Adherence to Mill Sampling SOPs ...................................................................... 7
3.3 Analyte Completeness Review ............................................................................ 7
3.4 Data Validation .................................................................................................... ?
3.4.1 Field Data QA/QC Evaluation ..................................................................... 7
3.4.2 Holding Time Evaluation ............................................................................ 8
3.4.3 Analytical Method Checklist ....................................................................... 8
3.4.4 Reporting Limit Evaluation ......................................................................... 8
3.4.5 QA/QC Evaluation for Sample Duplicates .................................................. &
3.4 .6 Other Laboratory QA/QC ............................................................................ 9
3.4.7 Receipt Temperature Evaluation ............................................................... 10
3.4.8 Rinsate Check ............................................................................................. 10
4.0 INTERPRETATION OF DATA ........................................................................ 10
4.1 Interpretation of Groundwater Levels, Gradients and Flow Directions ............ 10
4.1.1 Current Site Groundwater Contour Map ................................................... 10
4 .1.2 Comparison of Current Groundwater Contour Map to Groundwater Contour Map
for Previous Quarter .................................................................................. 15
4.1.4 Depth to Groundwater Measured and Groundwater Elevation ................. 16
4.2 Effectiveness of Hydraulic Containment and Capture ...................................... 16
4.2.1 Hydraulic Containment and Control.. ........................................................ 16
4.2.2 Current Nitrate and Chloride Isoconcentration Maps ................................ 20
4.2.3 Comparison of Areal Extent ............................................................................. 21
4.2.4 Nitrate and Chloride Concentration Trend Data and Graphs .................... 22
4.2.5 Interpretation of Analytical Data ............................................................... 22
4.3 Estimation of Pumped Nitrate Mass and Residual Nitrate Mass within the Plume
........................................................................................................................... 25
5.0 LONG TERM PUMP TEST AT TWN-02, TW4-22, TW4-24, and TW4-25
OPERATIONS REPORT ................................................................................... 27
5.1 Introduction ........................................................................................................ 27
5.2 Pumping Well Data Collection .......................................................................... 27
5.3 Water Level Measurements ............................................................................... 28
5.4 Pumping Rates and Volumes ............................................................................. 28
5.4.1 TW4-39 ............................................................................................................. 28
6.0 CORRECTIVE ACTION REPORT .................................................................. 29
Assessment of Previous Quarter's Corrective Actions ...................................... 29 6 .1
7.0
8.0
9.0
CONCLUSIONS AND RECOMMENDATIONS ............................................ 29
ELECTRONIC DATA FILES AND FORMAT ............................................... 34
SIGNATURE AND CERTIFICATION ............................................................ 35
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9
Table 10
LIST OF TABLES
Summary of Well Sampling and Constituents for the Period
Nitrate Mass Removal Per Well Per Quarter
Nitrate Well Pumping Rates and Volumes
Quarterly Calculation of Nitrate Mass Removed and Total Volume of Water
Pumped
Nitrate Data over Time for MW-30, MW-31, MW-5, and MW-11
Slug Test Results
Pre-Pumping Saturated Thickness
Pre-Pumping Hydraulic Gradients and Flow Calculations
Recalculated Background Flow
Summary of' Background ' Flow Estimates
11
INDEX OF TABS
Tab A Site Plan and Perched Well Locations White Mesa Site
Tab B Order of Sampling and Field Data Worksheets
Tab C Kriged Current Quarter Groundwater Contour Map and Weekly, Monthly and Quarterly
Depth to Water Data
Tab D Kriged Previous Quarter Groundwater Contour Map
Tab E Hydrographs of Groundwater Elevations over Time for Nitrate Monitoring Wells
Tab F Depths to Groundwater and Elevations over Time for Nitrate Monitoring Wells
Tab G Laboratory Analytical Reports
Tab H Quality Assurance and Data Validation Tables
H-1 Field Data QA/QC Evaluation
H-2 Holding Time Evaluation
H-3 Analytical Method Check
H-4 Reporting Limit Evaluation
H-5 QA/QC Evaluation for Sample Duplicates
H-6 QC Control limits for Analysis and Blanks
H-7 Receipt Temperature Evaluation
H-8 Rinsate Evaluation
Tab I Kriged Current Quarter Nitrate and Chloride Isoconcentration Maps
Tab J Analyte Concentration Data Over Time
Tab K Nitrate and Chloride Concentration Trend Graphs
Tab L CSV Transmittal Letter
Tab M Residual Mass Estimate Analysis Figure
iii
ACRONYM LIST
CA
CAP
CIR
CTF
DIFB
DWMRC
DRC
EFRI
ft amsl
GWDP
LCS
MS
MSD
QA
QAP
QC
RPD
sco
SOPs
UDEQ
voe
Consent Agreement
Corrective Action Plan
Contamination Investigation Report
Chemtech-Ford
Deionized Field Blanks
Utah Division of Waste Management and Radiation Control
Utah Division of Radiation Control
Energy Fuels Resources (USA) Inc.
feet above mean sea level
Groundwater Discharge Permit
Laboratory Control Spike
Matrix Spike
Matrix Spike Duplicate
Quality Assurance
Groundwater Monitoring Quality Assurance Plan
Quality Control
Relative Percent Difference
Stipulated Consent Order
Standard Operating Procedures
Utah Department of Environmental Quality
Volatile Organic Compound
lV
1.0 INTRODUCTION
The Utah Department of Environmental Quality ("UDEQ") Division of Waste Management and
Radiation Control ("DWMRC") noted in a Request dated September 30, 2008 (the "Request"),
for a Voluntary Plan and Schedule to Investigate and Remediate Nitrate Contamination at the
White Mesa Uranium Mill (the "Mill") (the "Plan"), that nitrate levels have exceeded the State
water quality standard of 10 mg/L in certain monitoring wells. As a result of the Request,
Energy Fuels Resources (USA) Inc. ("EFRI") entered into a Stipulated Consent Agreement with
the Utah Water Quality Board in January 2009 which directed the preparation of a Nitrate
Contamination Investigation Report ("CIR"). A subsequent letter dated December 1, 2009,
among other things, recommended that EFRI also address elevated chloride concentrations in the
CIR. The Stipulated Consent Agreement was amended in August 2011. Under the amended
Consent Agreement ("CA"), EFRI submitted a Corrective Action Plan ("CAP"), pursuant to the
requirements of the Utah Groundwater Quality Protection Rules [UAC R317-6-6.15(C-E)] on
November 29, 2011 and revised versions of the CAP on February 27, 2012 and May 7, 2012. On
December 12, 2012, DWMRC signed the Stipulation and Consent Order ("SCO"), Docket
Number UGW12-04, which approved the EFRI CAP, dated May 7, 2012. The SCO ordered
EFRI to fully implement all elements of the May 7, 2012 CAP.
Based on the schedule included in the CAP and as delineated and approved by the SCO, the
activities associated with the implementation of the CAP began in January 2013. The reporting
requirements specified in the CAP and SCO are included in this quarterly nitrate report.
This is the Quarterly Nitrate Monitoring Report, as required under the SCO, State of Utah
Docket No. UGW12-04 for the first quarter of 2024. This report meets the requirements of the
SCO, State of UDEQ Docket No. UGW12-04 and is the document which covers nitrate
corrective action and monitoring activities during the 1st quarter of 2024.
2.0 GROUNDWATER NITRATE MONITORING
2.1 Samples and Measurements Taken During the Quarter
A map showing the location of all groundwater monitoring wells, piezometers, existing wells,
temporary chloroform contaminant investigation wells and temporary nitrate investigation wells
is attached under Tab A. Nitrate samples and measurements taken during this reporting period
are discussed in the remainder of this section.
1
2.1.1 Nitrate Monitoring
Quarterly sampling for nitrate monitoring parameters was performed in the following wells:
TWN-1
TWN-2
TWN-3
TWN-4
TWN-7
TWN-18
TWN-20
TWN-21
TW4-22*
TW4-24*
TW4-25*
Piezometer 1
Piezometer 2
Piezometer 3A **
As discussed in Section 2.1.2 the analytical constituents required by the CAP are inorganic
chloride and nitrate+nitrite as N (referred to as nitrate in this document)
* Wells TW4-22, TW4-24, TW4-25 are chloroform investigation wells (wells installed and
sampled primarily for the chloroform investigation) and are sampled as part of the chloroform
program. The analytical suite for these three wells includes nitrate, chloride and a select list of
Volatile Organic Compounds ("VOCs") as specified in the chloroform program. These three
wells are included here because they are being pumped as part of the remediation of the nitrate
contamination as required by the SCO and the CAP. The nitrate and chloride data are included in
this report as well as in the chloroform program quarterly report. The VOC data for these three
wells will be reported in the chloroform quarterly monitoring report only.
** Piezometer 3 was abandoned and replaced with Piezometer 3A in March 2016.
The December 12, 2012 SCO approved the CAP, which specified the cessation of sampling in
TWN-5, TWN-6, TWN-8, TWN-9, TWN-10, TWN-11, TWN-12, TWN-13, TWN-14, TWN-15,
TWN-16, TWN-17, and TWN-19. The CAP and SCO also approved the abandonment of TWN-
5, TWN-8, TWN-9, TWN-10, TWN-11, TWN-12, TWN-13, TWN-15, and TWN-17 within 1
year of the SCO approval. These wells were abandoned in accordance with the DWMRC-
approved Well Abandonment Procedure on July 31, 2013. Wells TWN-6, TWN-14, TWN-16,
and TWN-19 have been maintained for depth to groundwater monitoring only, as noted in the
CAP.
Table 1 provides an overview of all locations sampled during the current period, along with the
date samples were collected from each location, and the date(s) upon which analytical data were
received from the contract laboratory. Table 1 also identifies rinsate samples collected, as well as
sample numbers associated with any required duplicates.
As indicated in Table 1, nitrate monitoring was performed in the nitrate monitoring wells,
chloroform wells TW4-22, TW4-24, TW4-25 and Piezometers 1, 2, and 3A. Analytical data for
all of the above-listed wells, and the piezometers, are included in Tab G.
2
Nitrate and chloride are also monitored in all of the Mill's groundwater monitoring wells and
chloroform investigation wells. Data from those wells for this quarter are incorporated in certain
maps and figures in this report but are discussed in their respective programmatic reports.
2.1.2 Parameters Analyzed
Locations sampled during this reporting period were analyzed for the following constituents:
• Inorganic Chloride
• Nitrate plus Nitrite as Nitrogen (referred to herein as nitrate)
Use of analytical methods consistent with the requirements found in the White Mesa Mill
Groundwater Quality Assurance Plan, ("QAP") Revision 7.7, dated February 15, 2022 was
confirmed for all analytes, as discussed later in this report.
2.1.3 Groundwater Head and Level Monitoring
Depth to groundwater was measured in the following wells and/or piezometers, pursuant to Part
I.E.3 of the Groundwater Discharge Permit ("GWDP"):
• The quarterly groundwater compliance monitoring wells
• Existing well MW-4 and all of the temporary chloroform investigation wells
• Piezometers -P-1, P-2, P-3A, P-4 and P-5
• MW-20, MW-22, and MW-34
• The DR piezometers that were installed during the Southwest Hydrogeologic
Investigation
• Nitrate wells TWN-1, TWN-2, TWN-3, TWN-4, TWN-6, TWN-7, TWN-14, TWN-16,
TWN-18, TWN-19, TWN-20 and TWN-21
In addition to the above, depth to water measurements are routinely observed in conjunction with
sampling events for all wells sampled during quarterly and accelerated efforts, regardless of the
sampling purpose.
All well levels used for groundwater contour mapping were measured and recorded within 5
calendar days of each other as indicated by the measurement dates in the summary sheet under
Tab C. Field data sheets for groundwater measurements are also provided in Tab C.
Weekly and monthly depth to groundwater measurements were taken in the chloroform pumping
wells MW-4, MW-26, TW4-1, TW4-2, TW4-11, TW4-19, TW4-4, TW4-21, TW4-37, TW4-39,
TW4-40, TW4-41, and the nitrate pumping wells TW4-22, TW4-24, TW4-25, and TWN-2.
In addition, monthly water level measurements were taken in non-pumping wells MW-27, MW-
30, MW-31, TWN-1, TWN-3, TWN-4, TWN-7, and TWN-18 as required by the CAP.
3
2.2 Sampling Methodology and Equipment and Decontamination Procedures
The QAP provides a detailed presentation of procedures utilized for groundwater sampling
activities under the GWDP.
The sampling methodology, equipment and decontamination procedures that were performed for
the nitrate contaminant investigation, as summarized below, are consistent with the QAP.
2.2.1 Well Purging, Sampling and Depth to Groundwater
A list of the wells in order of increasing nitrate contamination is generated quarterly. The order
for purging is thus established. The list is included with the Field Data Worksheets under Tab B.
Mill personnel start purging with all the nondetect wells and then move to the wells with
detectable nitrate concentrations, progressing from the wells having the lowest nitrate
contamination to wells with the highest nitrate contamination.
Before leaving the Mill office, the pump and hose are decontaminated using the cleaning agents
described in Attachment 2-2 of the QAP. Rinsate blanks are collected at a frequency of one
rinsate per 20 field samples.
Purging is completed to remove stagnant water from the casing and to assure that representative
samples of formation water are collected for analysis. There are three purging strategies specified
in the QAP that are used to remove stagnant water from the casing during groundwater sampling
at the Mill. The three strategies are as follows:
1. Purging three well casing volumes with a single measurement of field parameters
2. Purging two casing volumes with stable field parameters (within 10% Relative Percent
Difference ["RPD"])
3. Purging a well to dryness and stability (within 10% RPD) of a limited list of field parameters
after recovery.
Mill personnel proceed to the first well, which is the well with the lowest concentration (i.e. non-
detect) of nitrate based on the previous quarter's sampling results. Well depth measurements are
taken and the one casing volume is calculated. The purging strategy that will be used for the well
is determined at this time based on the depth to water measurement and the previous production
of the well. The Grundfos pump (a 6 to 10 gallon per minute [gpm] pump) is then lowered to the
appropriate depth in the well and purging is started. At the first well, the purge rate is measured
for the purging event by using a calibrated 5 gallon bucket. After the evacuation of the well has
been completed, the well is sampled when possible, and the pump is removed from the well and
the process is repeated at each well location moving from the least contaminated to most
contaminated well. If sample collection is not possible due to the well being purged dry, a
sample is collected after recovery using a disposable bailer and as described in Attachment 2-3
of the QAP. Sample collection follows the procedures described in Attachment 2-4 of the QAP.
After the samples have been collected for a particular well, the samples are placed into a cooler
that contains ice. The well is then recapped, and Mill personnel proceed to the next well. If a
bailer has been used it is disposed of.
4
Decontamination of non-dedicated equipment, using the reagents in Attachment 2-2 of the QAP,
is performed between each sample location, and at the beginning of each sampling day, in
addition to the pre-event decontamination described above.
2.2.2 Piezometer Sampling
Samples are collected from Piezometers 1, 2 and 3A, if possible. Samples are collected from
piezometers using a disposable bailer after one set of field measurements have been collected.
Due to the difficulty in obtaining samples from the piezometers, the purging protocols set out in
the QAP are not followed.
After samples are collected, the bailer is disposed of and samples are placed into a cooler
containing ice for sample preservation and transit to the Mill's contract analytical laboratory,
Chemtech-Ford ("CTF").
2.3 Field Data
Attached under Tab B are copies of all Field Data Worksheets that were completed during the
quarter for the nitrate investigation monitoring wells and piezometers identified in Section 2.1.1
and Table 1.
2.4 Depth to Groundwater Data and Water Table Contour Map
Depth-to-groundwater measurements that were utilized for groundwater contours are included on
the Quarterly Depth to Water Sheet at Tab C of this Report along with the kriged groundwater
contour map for the current quarter generated from this data. All well levels used for
groundwater contour mapping were measured and recorded within 5 calendar days of each other
as indicated by the measurement dates in the summary sheet under Tab C. A copy of the kriged
groundwater contour map generated from the previous quarter's data is provided under Tab D.
2.5 Laboratory Results
2.5.1 Copy of Laboratory Results
The analytical results were provided by CTF. Table 1 lists the dates when analytical results were
reported to the Director, Regulatory Compliance for each well or other sample.
Analytical results for the samples collected for this quarter's nitrate investigation and a limited
list of chloroform investigation nitrate and chloride results are provided under Tab G of this
Report. Also included under Tab Gare the results of analyses for duplicate samples and rinsate
samples for this sampling effort, as identified in Table 1. See the Groundwater Monitoring
Report and Chloroform Monitoring Report for this quarter for nitrate and chloroform analytical
results for the groundwater monitoring wells and chloroform investigation wells not listed in
Table 1.
5
2.5.2 Regulatory Framework
As discussed in Section 1.0 above, the Request, Plan, and CA each triggered a series of actions
on EFRl's part. Potential surficial sources of nitrate and chloride have been described in the
December 30, 2009 CIR and additional investigations into potential sources were completed and
discussed with DWMRC in 2011. Pursuant to the CA, the CAP was submitted to the Director of
the Division Waste Management and Radiation Control (the "Director") on May 7, 2012. The
CAP describes activities associated with the nitrate in groundwater. The CAP was approved by
the Director on December 12, 2012. This quarterly report documents the monitoring consistent
with the program described in the CAP.
3.0 QUALITY ASSURANCE AND DATA VALIDATION
EFRl's Director, Regulatory Compliance performed a Quality Assurance/Quality Control
("QA/QC") review to confirm compliance of the monitoring program with the requirements of
the QAP. As required in the QAP, data QA includes preparation and analysis of QC samples in
the field, review of field procedures, an analyte completeness review, and QC review of
laboratory data methods and data. Identification of field QC samples collected and analyzed is
provided in Section 3 .1. Discussion of adherence to Mill sampling Standard Operating
Procedures ("SOPs") is provided in Section 3.2. Analytical completeness review results are
provided in Section 3.3. The steps and tests applied to check field data QA/QC, holding times,
receipt temperature and laboratory data QA/QC are discussed in Sections 3.4.1 through 3.4.7
below.
The analytical laboratory has provided summary reports of the analytical QA/QC measurements
necessary to maintain conformance with National Environmental Laboratory Accreditation
Conference certification and reporting protocol. The Analytical Laboratory QA/QC Summary
Reports, including copies of the Mill's Chain of Custody and Analytical Request Record forms
for each set of Analytical Results, follow the analytical results under Tab G. Results of the
review of the laboratory QA/QC information are provided under Tab Hand discussed in Section
3.4, below.
3.1 Field QC Samples
The following QC samples were generated by Mill personnel and submitted to the analytical
laboratory in order to assess the quality of data resulting from the field sampling program.
Field QC samples for the nitrate investigation program consist of one field duplicate sample for
each 20 samples, DI Field Blanks ("DIFB"), and equipment rinsate samples.
During the quarter, one duplicate sample was collected as indicated in Table 1. The duplicate
was sent blind to the analytical laboratory and analyzed for the same parameters as the nitrate
wells.
One rinsate blank sample was collected as indicated on Table 1. Rinsate samples are labeled with
the name of the subsequently purged well with a terminal letter "R" added (e.g. TWN-7R).
6
The field QC sample results are included with the routine analyses under Tab G.
3.2 Adherence to Mill Sampling SOPs
The Director, Regulatory Compliance review of Mill Personnel's adherence to the existing
SOPs, confirmed that the QA/QC requirements established in the QAP and Nitrate QAP were
met.
3.3 Analyte Completeness Review
All analyses required by the GWDP for nitrate monitoring for the period were performed.
3.4 Data Validation
The QAP and GWDP identify the data validation steps and data QC checks required for the
nitrate monitoring program. Consistent with these requirements, the Director, Regulatory
Compliance performed the following evaluations: a field data QA/QC evaluation, a holding time
evaluation, an analytical method check, a reporting limit evaluation, a QC evaluation of sample
duplicates, a QC evaluation of control limits for analysis and blanks, a receipt temperature
evaluation, and a rinsate evaluation. Because no VOCs are analyzed for the nitrate contamination
investigation, no trip blanks are required in the sampling program. Each evaluation is discussed
in the following sections. Data check tables indicating the results of each test are provided under
TabH.
3.4.1 Field Data QA/QC Evaluation
The Director, Regulatory Compliance performs a review of all field recorded parameters to
assess their adherence with QAP requirements. The assessment involved review of two sources
of information: the Field Data Sheets and the Quarterly Depth to Water summary sheet. Review
of the Field Data Sheets addresses well purging volumes and stability of five parameters:
conductance, pH, temperature, redox potential, turbidity, and dissolved oxygen ("DO"). Review
of the Depth to Water data confirms that all depth measurements used for development of
groundwater contour maps were conducted within a five-day period of each other. The results of
this quarter's review are provided under Tab H.
Based upon the review of the field data sheets, field work was completed in compliance with the
QAP purging and field measurement requirements. A summary of the purging techniques
employed and field measurements taken is described below:
Purging Two Casing Volumes with Stable Field Parameters (within 10% RPD)
Wells TWN-01, TWN-04, and TWN-18 were sampled after two casing volumes were removed.
Field parameters pH, specific conductivity, turbidity, water temperature, DO, and redox potential
were measured during purging. All field parameters for this requirement were stable within 10%
RPD.
Purging a Well to Dryness and Stability of a Limited List of Field Parameters
Wells TWN-03, TWN-07, TWN-20, and TWN-21 were purged to dryness before two casing
7
volumes were evacuated. After well recovery, one set of measurements for the field parameters
of pH, specific conductivity, and water temperature only were taken; the samples were collected,
and another set of measurements for pH, specific conductivity, and water temperature were
taken. Stabilization of pH, conductivity and temperature are required within 10% RPD under the
QAP. All field parameters for this requirement were stable within 10% RPD.
Continuously Pumped Wells
Wells TWN-02, TW4-22, TW4-24, and TW4-25 are continuously pumped wells. These wells are
pumped on a set schedule per the remediation plan and are considered sufficiently evacuated to
immediately collect a sample. As previously noted, TW4-22, TW4-24, and TW4-25 are
chloroform investigation wells and are sampled under the chloroform program. Data for nitrate
and chloride are provided here for completeness purposes.
During review of the field data sheets, it was observed that sampling personnel consistently
recorded depth to water to the nearest 0.01 foot.
All field parameters for all wells were within the QAP required limits, as indicated below.
The field data collected during the quarter were in compliance with QAP requirements.
3.4.2 Holding Time Evaluation
QAP Table 1 identifies the method holding times for each suite of parameters. Sample holding
time checks are provided in Tab H. All samples were received and analyzed within the required
holding time.
3.4.3 Analytical Method Checklist
All analytical methods reported by the laboratory were checked against the required methods
enumerated in the QAP. Analytical method checks are provided in Tab H. All methods were
consistent with the requirements of the QAP.
3.4.4 Reporting Limit Evaluation
All analytical method reporting limits ("RLs") reported by the laboratory were checked against
the reporting limits enumerated in the QAP. Reporting Limit Checks are provided in Tab H. All
analytes were measured and reported to the required reporting limits, with the exception of
several samples that had increased reporting limits due to matrix interference or required dilution
due to the sample concentration. However, in all of those cases the analytical results were greater
than the reporting limit used.
3.4.5 QA/QC Evaluation for Sample Duplicates
Section 9.1.4 a) of the QAP states that RPDs will be calculated for the comparison of duplicate
and original field samples. The QAP acceptance limits for RPDs between the duplicate and
original field sample is less than or equal to 20% unless the measured results are less than 5
times the required detection limit. This standard is based on the EPA Contract Laboratory
Program National Functional Guidelines for Inorganic Data Review, February 1994, 9240.1-05-
8
01 as cited in the QAP. The RPDs are calculated for duplicate pairs for all analytes regardless of
whether or not the reported concentrations are greater than 5 times the required detection limits.
However, data will be considered noncompliant only when the results are greater than 5 times
the required detection limit and the RPD is greater than 20%.
The duplicate results were within a 20% RPD in the samples. Results of the RPD test are
provided in Tab H.
3.4.6 Other Laboratory QA/QC
Section 9.2 of the QAP requires that the laboratory's QA/QC Manager check the following items
in developing data reports: (1) sample preparation information is correct and complete, (2)
analysis information is correct and complete, (3) appropriate Analytical Laboratory procedures
are followed, (4) analytical results are correct and complete, (5) QC samples are within
established control limits, (6) blanks are within QC limits, (7) special sample preparation and
analytical requirements have been met, and (8) documentation is complete. In addition to other
laboratory checks described above, EFRl's Director, Regulatory Compliance rechecks QC
samples and blanks (items (5) and (6)) to confirm that the percent recovery for spikes and the
relative percent difference for spike duplicates are within the method-specific required limits, or
that the case narrative sufficiently explains any deviation from these limits. Results of this
quantitative check are provided in Tab H.
The lab QA/QC results met these specified acceptance limits.
The QAP, Section 8.1.2 states that an MS/MSD pair may be analyzed with each analytical batch
depending on the analytical method specifications. The QAP does not specify acceptance limits
for the MS/MSD pair, and the QAP does not specify that the MS/MSD pair be prepared on EFRI
samples only. Acceptance limits for MS/MSDs are set by the laboratories. The review of the
information provided by the laboratories in the data packages verified that the specifications in
the analytical methods to analyze either an MS or MS/MSD pair with each analytical batch were
met as applicable to each method. While the QAP does not require it, the recoveries were
reviewed for compliance with the laboratory established acceptance limits. The QAP does not
require this level of review and the results of this review are provided for information only.
The information from the Laboratory QA/QC Summary Reports indicates that the MS/MSDs
recoveries and the associated RPDs for the samples were within acceptable laboratory limits
except as indicated in Tab H. The data recoveries and RPDs which are outside the laboratory
established acceptance limits do not affect the quality or usability of the data because the
recoveries and RPDs above or below the acceptance limits are indicative of matrix interference
most likely caused by other constituents in the samples. Matrix interferences are applicable to the
individual sample results only. The specifications in the analytical methods to analyze a
MS/MSD pair with each analytical batch (as applicable to the methods) was met and as such the
data are compliant with the QAP.
The information from the Laboratory QA/QC Summary Reports indicates that the Laboratory
Control Sample recoveries were acceptable, which indicate that the analytical system was
operating properly.
9
The QAP Section 8.1.2 requires that each analytical batch shall be accompanied by a reagent
blank. All analytical batches routinely contain a blank, which is a laboratory-grade water blank
sample made and carried through all analytical steps. For the Mill samples, a method blank is
prepared for all analytical methods. The information from the Laboratory QA/QC Summary
Reports indicates that the method blanks did not contain detections of any target analytes above
the RL.
3.4.7 Receipt Temperature Evaluation
Chain of Custody sheets were reviewed to confirm compliance with the QAP requirement in
QAP Table 1 that samples be received at 6°C or lower. Sample temperatures checks are provided
in Tab H. All samples were received within the required temperature limit.
3.4.8 Rinsate Check
Rinsate checks are provided in Tab H. A comparison of the rinsate blank sample concentration
levels to the QAP requirements -that rinsate sample concentrations be one order of magnitude
lower than that of the actual well -indicated that all of the rinsate blank analytes met this
criterion. All rinsate blank samples were non-detect for the quarter.
One DIFB is collected during the sampling of the nitrate wells and one DIFB is collected during
the sampling of the chloroform wells. The DIFB is a sample of the deionized water used for
decontamination of equipment. The DIFB collected during the chloroform sampling program
which reported a detection of nitrate of 0.103 mg/L which is slightly above the reporting limit of
0.100 mg/L. A comparison of the DIFB sample concentration levels to the QAP requirements -
that DIFB sample concentrations be one order of magnitude lower than that of the actual well(s)
indicated that the DIFB nitrate concentration met this criterion except in sample TW4-25. The
DIFB detection does not affect the usability of the data, because the detection in a DIFB could
possible indicate cross contamination in TW4-25. Any cross contamination would result in a
high bias to the sample results.
4.0 INTERPRETATION OF DATA
4.1 Interpretation of Groundwater Levels, Gradients and Flow Directions.
4.1.1 Current Site Groundwater Contour Map
As stated above, a listing of groundwater level readings for the current quarter ( shown as depth
to groundwater in feet) is included under Tab C. The data from this tab has been interpreted
(interpolated by kriging) and plotted in a water table contour map, provided under the same tab.
The contour map is based on the current quarter's data for all wells.
The water level contour maps indicate that perched water flow ranges from generally
southwesterly beneath the Mill site and tailings cells to generally southerly along the eastern and
western margins of White Mesa south of the tailings management system. Perched water
mounding associated with the wildlife ponds is still evident and locally changes the generally
southerly perched water flow patterns. For example, northeast of the Mill site, mounding
10
associated with formerly used wildlife ponds disrupts the generally southwesterly flow pattern,
to the extent that locally northwesterly flow occurs near MW-19 and PIEZ-1. The impact of the
mounding associated with the northern ponds, to which water has not been delivered since
March 2012, is diminishing and is expected to continue to diminish as the mound decays due to
reduced recharge. The perched groundwater mound associated with the southern wildlife pond is
also diminishing due to reduced recharge at that location.
Not only has recharge from the wildlife ponds impacted perched water elevations and flow
directions at the site, but the cessation of water delivery to the northern ponds, which are
generally upgradient of the nitrate and chloroform plumes at the site, resulted in changing
conditions that were expected to impact constituent concentrations and migration rates within the
plumes. Specifically, past recharge from the ponds helped limit many constituent concentrations
within the plumes by dilution while the associated groundwater mounding increased hydraulic
gradients and contributed to plume migration. Since use of the northern ponds was discontinued
in March, 2012, increases in constituent concentrations in many wells, and decreases in hydraulic
gradients within the plumes, are attributable to reduced recharge and the decay of the associated
groundwater mound. EFRI and its consultants anticipated these changes and discussed these and
other potential effects during discussions with DWMRC in March 2012 and May 2013.
The impacts associated with cessation of water delivery to the northern ponds were expected to
propagate downgradient (south and southwest) over time. Wells close to the ponds were
generally expected to be impacted sooner than wells farther downgradient of the ponds.
Therefore, constituent concentrations were generally expected to increase in downgradient wells
close to the ponds before increases were detected in wells farther downgradient of the ponds.
Although such increases were anticipated to result from reduced dilution, the magnitude and
timing of the increases were anticipated to be and have been difficult to predict due to the
complex permeability distribution at the site and factors such as pumping and the rate of decay of
the groundwater mound. Because of these complicating factors, some wells completed in higher
permeability materials were expected to be impacted sooner than other wells completed in lower
permeability materials even though the wells completed in lower permeability materials were
closer to the ponds.
In general, nitrate concentrations within and adjacent to the nitrate plume appear to have been
impacted to a lesser extent than chloroform and nitrate concentrations within and in the vicinity
of the chloroform plume. This behavior is reasonable considering that the chloroform plume is
generally more directly downgradient of and more hydraulically connected (via higher
permeability materials) to the wildlife ponds.
Localized increases in concentrations of constituents such as nitrate and chloride within and near
the nitrate plume may occur even when the nitrate plume is under control based on the Nitrate
CAP requirements. Ongoing mechanisms that can be expected to increase the concentrations of
nitrate and chloride locally as a result of reduced wildlife pond recharge include but are not
limited to:
1) Reduced dilution -the m1xmg of low constituent concentration pond recharge into
existing perched groundwater will be reduced over time.
11
2) Reduced saturated thicknesses -dewatering of higher permeability zones rece1vmg
primarily low constituent concentration pond water will result in wells intercepting the
zones receiving a smaller proportion of the low constituent concentration water.
The combined impact of the above two mechanisms was anticipated to be more evident at
chloroform pumping wells MW-4, MW-26, TW4-4, TW4-19, and TW4-20 (now abandoned);
nitrate pumping wells TW4-22, TW4-24, TW4-25, and TWN-2; and non-pumped wells adjacent
to the pumped wells. Impacts were also expected to occur over time at wells subsequently added
to the chloroform pumping network: TW4-1, TW4-2, TW4-11, TW4-21 and TW4-37 (added
during 2015); TW4-39 (added during the fourth quarter of 2016); TW4-41 (added during the
second quarter of 2018); and TW4-40 (added during the second quarter of 2019). The overall
impact was expected to be generally higher constituent concentrations in these wells over time
until mass reduction resulting from pumping and natural attenuation eventually reduces
concentrations. Short-term changes in concentrations at pumping wells and wells adjacent to
pumping wells are also expected to result from changes in pumping conditions.
In addition to changes in the flow regime caused by wildlife pond recharge, perched flow
directions are locally influenced by operation of the chloroform and nitrate pumping wells. Well-
defined cones of depression were typically evident in the vicinity of all chloroform pumping
wells except TW4-4 and TW4-37, which began pumping in the first quarter of 2010 and the
second quarter of 2015, respectively. The third quarter of 2018 was the first quarter that a well-
defined cone of depression was associated with TW 4-4, primarily the result of pumping at
adjacent well TW4-41.
The lack of well-defined capture associated with chloroform pumping well TW4-4 was
consistent prior to the third quarter of 2018, even though pumping since the first quarter of 2010
has depressed the water table in the vicinity of this well. The lack of a well-defined cone of
depression near TW 4-4 likely resulted from 1) variable permeability conditions in the vicinity of
TW 4-4, and 2) persistent relatively low water levels at adjacent well TW 4-14.
Pumping of nitrate wells TW4-22, TW4-24, TW4-25, and TWN-2 began during the first quarter
of 2013. Water level patterns near these wells are expected to be influenced by the presence of
and the decay of the groundwater mound associated with the northern wildlife ponds, and by the
historically relatively low water level elevation at TWN-7. Although positioned up-to cross-
gradient of the nitrate pumping wells, TWN-7 is also typically downgradient of TWN-3 and the
northern (upgradient) extremity of the nitrate plume. Since 2012, water levels in TWN-7 have
risen while water levels in nearby wells have generally dropped due to pumping and the decay of
the northern groundwater mound. These factors have reduced water level differences between
TWN-7 and nearby wells.
Capture associated with nitrate pumping is expected to continue to increase over time as water
levels decline due to pumping and to cessation of water delivery to the northern wildlife ponds.
Interaction between nitrate and chloroform pumping is expected to enhance the capture of the
nitrate pumping system. The long-term interaction between the nitrate and chloroform pumping
systems is evolving, and changes will be reflected in data collected during routine monitoring.
12
As discussed above, variable permeability conditions are one likely reason for the prior lack of a
well-defined cone of depression near chloroform pumping well TW4-4. Changes in water levels
at wells immediately south and southeast (downgradient) of TW4-4 resulting from TW4-4
pumping were expected to be muted because TW 4-4 is located at a transition from relatively
high to relatively low permeability conditions south and southeast of TW4-4. As will be
discussed below, the permeability of the perched zone at TW4-6, TW4-26, TW4-29, TW4-30,
TW4-31, TW4-33, TW4-34, and TW4-35 is one to two orders of magnitude lower than at TW4-
4, and the permeability at TW4-27 is approximately three orders of magnitude lower than at
TW4-4.
Detecting water level drawdowns in wells immediately south and southeast of TW 4-4 resulting
from TW4-4 pumping has also been complicated by a former, long-term increase in water levels
in this area that has been attributable to past wildlife pond recharge. Between the fourth quarter
of 2007 and the fourth quarter of 2009 (just prior to the start of TW 4-4 pumping), water levels at
TW4-4 and TW4-6 increased by nearly 2.7 and 2.9 feet at rates of approximately 1.2 feet/year
and 1.3 feet/year, respectively. However, between the start of pumping at TW4-4 (first quarter of
2010) and the fourth quarter of 2013, the rate of increase in water level at TW4-6 was reduced to
less than 0.5 feet/year suggesting that TW4-6 is within the hydraulic influence of TW4-4.
Water levels in wells currently within the chloroform plume south of TW4-4 (TW4-26, TW4-29
and TW4-40) are generally decreasing to stable. Note that water levels at TW4-30, which was
incorporated within the plume between the fourth quarter of 2020 and second quarter of 2022,
have been decreasing since 2020. Generally decreasing to stable water levels are evident at
TW4-26 and TW4-29 since the fourth quarter of 2013; and at TW4-40 since installation in the
first quarter of 2018. The water level in TW4-6 (remaining outside the plume again this quarter)
has also trended generally downward since the fourth quarter of 2013; likewise the water level at
TW4-33 (outside the chloroform plume since the first quarter of 2021) has trended downward
since 2013. These generally downward trends are attributable to both reduced wildlife pond
recharge and pumping. Although water levels at some of the wells marginal to the chloroform
plume such as TW4-14, TW4-27 and TW4-31 were generally increasing until about the first
quarter of 2018, these water levels now appear to be relatively stable to decreasing. Water level
trends at TW4-30 have been similar to those at TW4-27.
These spatially variable water level trends likely result from pumpmg conditions, the
permeability distribution, and distance from the wildlife ponds. Wells that are relatively
hydraulically isolated ( due to completion in lower permeability materials or due to intervening
lower permeability materials) and that are more distant from pumping wells and the wildlife
ponds, are expected to respond more slowly to pumping and reduced recharge than wells that are
less hydraulically isolated and are closer to pumping wells and the wildlife ponds. Wells that are
more hydraulically isolated will also respond more slowly to changes in pumping.
The previous lack of a well-defined cone of depression associated with TW4-4 was also
influenced by the persistent, relatively low water level at non-pumping well TW 4-14, located
east of TW 4-4 and TW 4-6. Although water level differences among these three wells had
diminished, the water level at TW 4-14 was typically lower than the water level at TW 4-6 and
several feet lower than the water level at TW 4-4 even though TW 4-4 has been pumping since
2010. However, since the first quarter of 2018, as a result of pumping at TW4-41 (adjacent to
13
TW4-4), and declining water levels at TW4-6, the water level at TW4-14 was typically higher
than the water levels at both TW4-4 and TW4-6. During the current quarter the water level at
TW4-14 (approximately 5535.3 feet above mean sea level ["ft amsl"]) is more than 7 feet higher
than the water level at TW4-6 (approximately 5527.8 ft amsl), and is more than 7 feet higher
than the water level at TW4-4 (approximately 5528.0 ft. amsl).
The static water levels at wells TW4-14 and downgradient well TW4-27 (installed south of
TW 4-14 in the fourth quarter of 2011) were similar ( within 1 to 2 feet) until the third quarter of
2014; both appeared anomalously low. Prior to the installation of TW4-27, the persistently low
water level at TW 4-14 was considered anomalous because it appeared to be downgradient of all
three wells TW4-4, TW4-6, and TW4-26, yet chloroform had not been detected at TW4-14.
Chloroform had apparently migrated from TW4-4 to TW4-6 and from TW4-6 to TW4-26. This
suggested that TW4-26 was actually downgradient of TW4-6, and TW4-6 was actually
downgradient of TW4-4, regardless of the flow direction implied by the relatively low water
level at TW4-14. The water level at TW4-26 (5525.8 feet amsl) is, however, lower than water
levels at adjacent wells TW4-6 (5527.8 feet amsl) and TW4-23 (5529.9 feet amsl), as shown in
the detail water level map under Tab C.
Hydraulic tests indicate that the permeability at TW4-27 is an order of magnitude lower than at
TW4-6 and three orders of magnitude lower than at TW4-4 (see Hydro Geo Chem, Inc. [HGC],
September 20, 2010: Hydraulic Testing of TW4-4, TW4-6, and TW4-26, White Mesa Uranium
Mill, July 2010; and HGC, November 28, 2011: Installation, Hydraulic Testing, and Perched
Zone Hydrogeology of Perched Monitoring Well TW4-27, White Mesa Uranium Mill Near
Blanding, Utah). Past similarity of water levels at TW4-14 and TW4-27, and the low
permeability estimate at TW4-27, suggested that both wells were completed in materials having
lower permeability than nearby wells. The low permeability condition likely reduced the rate of
long-term water level increase at TW4-14 and TW4-27 compared to nearby wells, yielding water
levels that appeared anomalously low. This behavior is consistent with hydraulic test data
collected from more recently installed wells TW4-29, TW4-30, TW4-31, TW4-33, TW4-34 and
TW4-35, which indicate that the permeability of these wells is one to two orders of magnitude
higher than the permeability of TW4-27 (see: HGC, January 23, 2014, Contamination
Investigation Report, TW4-12 and TW4-27 Areas, White Mesa Uranium Mill Near Blanding,
Utah; and HGC, July 1, 2014, Installation and Hydraulic Testing of TW4-35 and TW4-36,
White Mesa Uranium Mill Near Blanding, Utah [As-Built Report]). Hydraulic tests also indicate
that the permeability at TW4-36 is slightly higher than but comparable to the low permeability at
TW4-27, suggesting that TW4-36, TW4-14 and TW4-27 are completed in a continuous low
permeability zone.
The current quarterly water level at TW4-27 (approximately 5528.4 ft. amsl) is nearly 7 feet
lower than the water level at TW4-14 (5535.3 ft. amsl). Increases in water level differences
between TW4-14 and TW4-27 since 2013 are attributable to more rapid increases in water levels
at TW4-14 compared to TW4-27. This behavior likely results primarily from: the relative
positions of the wells; past water delivery to the northern wildlife ponds; and the permeability
distribution. Past seepage from the ponds caused propagation of water level increases in all
directions including downgradient to the south. The relative hydraulic isolation of TW 4-14 and
TW4-27 delayed responses at these locations. Until pumping started at TW4-41, water levels at
both these wells were consistently lower than in surrounding higher permeability materials even
14
though water levels in surrounding materials were generally decreasing due to reduced pond
seepage and pumping. Although water levels at TW4-14 and TW4-27 appear to have stabilized,
the previous rate of increase was higher at TW 4-14 due to factors that include: closer proximity
to the northern pond seepage source and a smaller thickness of low permeability materials
separating TW 4-14 from surrounding higher permeability materials. In addition, hydraulic
gradients between TW 4-14 and surrounding higher permeability materials were relatively large
and were consistently directed toward TW 4-14 prior to TW 4-41 pumping. Slowing of the rates
of water level increase at TW4-14 (since 2015) and TW4-27 (since early 2014), and relative
stabilization since about the first quarter of 2018, are attributable to changes in hydraulic
gradients between these wells and surrounding higher permeability materials.
In addition, water levels in this area are affected by reduced recharge at the southern wildlife
pond and the decay of the associated groundwater mound. The decay of the mound is expected to
contribute to changes in hydraulic gradients between the low permeability materials penetrated
by TW4-14 and TW4-27 and the surrounding higher permeability materials. Because TW4-27 is
closer to the southern wildlife pond than TW4-14, changes in hydraulic gradients attributable to
decay of the southern groundwater mound are expected to impact TW4-27 sooner and to a
greater extent than TW4-14, consistent with the lower rate of increase in water levels at TW4-27,
and the earlier reduction in the rate of increase ( since early 2014) as discussed above).
4.1.2 Comparison of Current Groundwater Contour Map to Groundwater Contour Map
for Previous Quarter
The groundwater contour map for the Mill site for the previous quarter, as submitted with the
Nitrate Monitoring Report for the previous quarter, is attached under Tab D. A comparison of the
water table contour maps for the current quarter (first quarter of 2024) to the water table contour
maps for the previous quarter (fourth quarter of 2023) indicates the following: water level
changes at the majority of site wells were small ( < 1 foot); and water level contours have not
changed significantly except in the vicinities of many of the nitrate and chloroform pumping
wells. Overall, total capture resulting from pumping is larger last quarter's capture.
The drawdowns at chloroform pumping well MW-26; and nitrate pumping wells TW4-22, TW4-
24 and TWN-2 increased by more than 2 feet this quarter, whereas drawdowns at chloroform
pumping wells TW4-1, TW4-2 and TW4-19 decreased by more than 2 feet this quarter. Water
level changes at other nitrate and chloroform pumping wells were 2 feet or less, although both
increases (decreases in drawdown) and decreases (increases in drawdown) occurred. Water level
fluctuations at pumping wells typically occur in part because of fluctuations in pumping
conditions just prior to and at the time the measurements are taken. The reported water levels for
chloroform pumping well TW 4-11 is below the depth of the Brushy Basin contact this quarter.
Although both increases and decreases in drawdown occurred in pumping wells, the overall
apparent capture area of the combined pumping system is larger than last quarter.
As discussed in Section 4.1.1, pumping at chloroform well TW4-4, which began in the first
quarter of 2010, depressed the water table near TW4-4, but a well-defined cone of depression
was not clearly evident until the third quarter of 2018, likely due to variable permeability
conditions near TW4-4 and the historic persistently low water level at adjacent well TW4-14.
15
The expanded cone of depression associated with TW4-4 and adjacent pumping well TW4-41
since the initiation of pumping at TW 4-41 in the second quarter of 2018 has contributed to
southerly expansion of total pumping system capture. Southerly expansion of capture was
additionally enhanced in the second quarter of2019 by the initiation of pumping at TW4-40.
The water levels at Piezometers 1 through 3A; and at TWN-4 increased this quarter, with a
maximum increase of approximately 0. 73 ft at PIEZ-1. However, water levels at Piezometers 4
and 5; and at TWN-1 decreased this quarter, with a maximum decrease of approximately 2.6 ft at
Piez-4. Water levels at these installations typically decrease in response to cessation of water
delivery to the wildlife ponds as discussed in Section 4.1.1 and the consequent continuing decay
of the associated perched water mounds.
Typically variable, the reported water level at MW-20 increased by approximately 2.3 ft partially
compensating for the approximately3.1 ft decrease last quarter. Water level variability at this
well has likely resulted from low permeability and variable intervals between purging/sampling
and water level measurement.
Measurable water was not reported at DR-22. Although DR-22 is typically dry, measurable
water was reported in the bottom of its casing between the second quarter of 2015 and the third
quarter of 2016. Similarly, no measurable water was reported at DR-12. Measurable water has
not been reported at DR-12 since the end of 2021.
4.1.3 Hydrographs
Attached under Tab E are hydrographs showing groundwater elevation in each nitrate
contaminant investigation monitor well over time. Per the CAP, nitrate wells TWN-6, TWN-14,
TWN-16, and TWN-19 have been maintained for depth to groundwater monitoring only. These
hydrographs are also included in Tab E.
4.1.4 Depth to Groundwater Measured and Groundwater Elevation
Attached in Tab Fare tables showing depth to groundwater measured and groundwater elevation
over time for each of the wells listed in Section 2.1.1 above.
4.2 Effectiveness of Hydraulic Containment and Capture
4.2.1 Hydraulic Containment and Control
The CAP states that hydraulic containment and control will be evaluated in part based on water
level data and in part on concentrations in wells downgradient of pumping wells TW4-22 and
TW4-24.
As per the CAP, the fourth quarter of 2013 was the first quarter that hydraulic capture associated
with nitrate pumping wells TW4-22, TW4-24, TW4-25, and TWN-2 was evaluated. Hydraulic
containment and control based on water level data is considered successful per the CAP if the
entire nitrate plume upgradient of TW4-22 and TW4-24 falls within the combined capture of the
nitrate pumping wells. Capture zones based on water level contours calculated by kriging the
current quarter's water level data are provided on water level contour maps included under Tab
16
C. The nitrate capture zones are defined by the bounding stream tubes associated with nitrate
pumping wells. Each bounding stream tube represents a flow line parallel to the hydraulic
gradient and therefore perpendicular to the intersected water level contours. Assuming that the
stream tubes do not change over time, all flow between the bounding stream tubes associated
with a particular pumping well is presumed to eventually reach and be removed by that well.
Capture associated with chloroform pumping wells is also included on these maps because the
influence of the chloroform and nitrate pumping systems overlap.
The specific methodology for calculating the nitrate capture zones is substantially the same as
that used since the fourth quarter of 2005 to calculate the capture zones for the chloroform
program, as agreed to by the DWMRC and EFRl. The procedure for calculating nitrate capture
zones is as follows:
1) Calculate water level contours by gridding the water level data on approximately 50-foot
centers using the ordinary linear kriging method in Surfer™. Default kriging parameters
are used that include a linear variogram, an isotropic data search, and all the available
water level data for the quarter, including relevant seep and spring elevations.
2) Calculate the capture zones by hand from the kriged water level contours following the
rules for flow nets:
-From each pumping well, reverse track the stream tubes that bound the capture zone of
each well,
-maintain perpendicularity between each stream tube and the kriged water level contours.
Compared to last quarter, both increases and decreases in water levels occurred at nitrate and
chloroform pumping wells, although changes in water levels in chloroform pumping wells MW-
4, TW4-4, TW4-11, TW4-21, TW4-37, TW4-39, TW4-40 and TW4-41; and nitrate pumping
well TW4-25 were less than two feet. Water level decreases occurred in chloroform pumping
wells MW4-4 (nearly 1.2 feet); MW-26 (approximately 8.5 feet); TW4-4 (approximately 0.2
feet); TW4-11 (approximately 1.2 feet); TW4-37 (nearly 0.9 feet); TW4-39 (nearly 0.4 feet); and
TW4-40 (nearly 0.6 feet); and in nitrate pumping wells TW4-22 (nearly 2.2 feet); TW4-24
(nearly 3.5 feet); TW4-25 (approximately 0.5 feet); and TWN-2 (nearly 18 feet). Water level
increases occurred in chloroform pumping wells TW4-1 (more than 5.1 feet); TW4-2 (nearly 5.8
feet); TW4-19 (nearly 12.7 feet); TW4-21 (nearly 2 feet); and TW4-41 (nearly 0.7 feet).
Overall, the apparent combined capture area of the nitrate and chloroform pumping systems is
larger than last quarter.
The capture associated with nitrate pumping wells and the eight chloroform pumping wells
added since the first quarter of 2015 is expected to generally increase over time as water levels
continue to decline due to pumping and to cessation of water delivery to the northern wildlife
ponds. Slow development of hydraulic capture is consistent with and expected based on the
relatively low permeability of the perched zone at the site. Furthermore, although the perched
groundwater mound has diminished, and water levels at TWN-7 have risen, the definition of
capture associated with the nitrate pumping system continues to be influenced by the remaining
perched groundwater mound and the historically relatively low water level at TWN-7.
17
That pumping is likely sufficient to eventually capture the entire plume upgradient of TW4-22
and TW4-24 can be demonstrated by comparing the combined average pumping rates of all
nitrate pumping wells for the current quarter to estimates of pre-pumping flow through the nitrate
plume near the locations of TW4-22 and TW4-24. The pre-pumping flow calculation presented
from the fourth quarter of 2013 through the second quarter of 2015 was assumed to represent a
steady state 'background' condition that included constant recharge, hydraulic gradients, and
saturated thicknesses; the calculation did not account for reduced recharge and saturated
thickness caused by cessation of water delivery to the northern wildlife ponds since March, 2012.
Because significant water level declines have occurred in upgradient portions of the nitrate
plume due to reduced recharge, hydraulic gradients within the plume have been reduced
independent of pumping. Changes related to reduced wildlife pond recharge have also resulted in
reduced well productivity. Generally reduced productivities of nitrate pumping well TW4-24 and
chloroform pumping well TW 4-19 since the third quarter of 2014 are at least partly the result of
reduced recharge.
The pre-pumping flow through the nitrate plume near TW4-22 and TW4-24 that was presented
from the fourth quarter of 2013 through the second quarter of 2015 was estimated using Darcy's
Law to lie within a range of approximately 1.31 gpm to 2. 79 gpm. Calculations were based on an
average hydraulic conductivity range of 0.15 feet per day (ft. /day) to 0.32 ft. /day (depending on
the calculation method), a pre-pumping hydraulic gradient of 0.025 feet per foot (ft. /ft.), a plume
width of 1,200 feet, and a saturated thickness (at TW4-22 and TW4-24) of 56 feet. The hydraulic
conductivity range was estimated by averaging the results obtained from slug test data that were
collected automatically by data loggers from wells within the plume and analyzed using the KGS
unconfined slug test solution available in Aqtesolv™ (see Hydro Geo Chem, Inc. [HGC], August
3, 2005: Perched Monitoring Well Installation and Testing at the White Mesa Uranium Mill,
April Through June 2005; HGC, March 10, 2009: Perched Nitrate Monitoring Well Installation
and Hydraulic Testing, White Mesa Uranium Mill; and HGC, March 17 2009: Letter Report to
David Frydenlund, Esq, regarding installation and testing of TW4-23, TW4-24, and TW4-25).
These results are summarized in Table 6. Data from fourth quarter 2012 were used to estimate
the pre-pumping hydraulic gradient and saturated thickness. These data are summarized in
Tables 7 and 8.
The average hydraulic conductivity was estimated to lie within a range of 0.15 ft. /day to 0.32 ft.
/day. Averages were calculated four ways. As shown in Table 6 arithmetic and geometric
averages for wells MW-30, MW-31, TW4-22, TW4-24, TW4-25, TWN-2, and TWN-3 were
calculated as 0.22 and 0.15 ft. /day, respectively. Arithmetic and geometric averages for a subset
of these wells (MW-30, MW-31, TW4-22, and TW4-24) were calculated as 0.32 and 0.31
ft./day, respectively. The lowest value, 0.15 ft. /day, represented the geometric average of the
hydraulic conductivity estimates for all the plume wells. The highest value, 0.32 ft. /day,
represented the arithmetic average for the four plume wells having the highest hydraulic
conductivity estimates (MW-30, MW-31, TW4-22, and TW4-24).
Pre-pumping hydraulic gradients were estimated at two locations; between TW4-25 and MW-31
(estimated as 0.023 ft. /ft.), and between TWN-2 and MW-30 (estimated as 0.027 ft. /ft.). These
results were averaged to yield the value used in the calculation (0.025 ft. /ft.). The pre-pumping
saturated thickness of 56 feet was an average of pre-pumping saturated thicknesses at TW4-22
and TW4-24.
18
As discussed above the hydraulic gradient and saturated thickness used in the pre-pumping
calculations were assumed to represent a steady state 'background' condition that was
inconsistent with the cessation of water delivery to the northern wildlife ponds, located
upgradient of the nitrate plume. Hydraulic gradients and saturated thicknesses within the plume
have declined since nitrate pumping began as a result of two factors: reduced recharge from the
ponds, and the effects of pumping. A more representative 'background' flow condition that
accounted for reduced wildlife pond recharge was presented in Attachment N (Tab N) of the
third quarter 2015 Nitrate Monitoring report. The original pre-pumping 'background' flow range
of 1.31 gpm to 2.79 gpm was recalculated to range from 0.79 gpm to 1.67 gpm, as presented in
Table 9. This calculation was still considered conservative because the high end of the range
assumed an arithmetic average hydraulic conductivity of a subset of plume wells having the
highest conductivities.
However, since recalculation of the 'background' flow in 2015, saturated thicknesses and
hydraulic gradients within the plume have continued to decline, further reducing the rate of flow
through the plume. To account for this additional reduction, the 'background' flow was
recalculated to range from 0.63 gpm to 1.34 gpm, as presented in HOC, June 21, 2023; Nitrate
Corrective Action Comprehensive Monitoring Evaluation (CACME) Report, White Mesa
Uranium Mill Near Blanding, Utah. Table 10 summarizes the pre-pumping; second quarter 2015;
and latest 'background' flow estimates.
The cumulative volume of water removed by nitrate pumping wells TW4-22, TW4-24, TW4-25,
and TWN-2 during the current quarter was approximately 217,555 gallons. This equates to an
average total extraction rate of approximately 1. 7 gpm over the 90-day quarter. This average
accounts for time periods when pumps were off due to insufficient water columns in the wells.
The current quarter's pumping of approximately 1. 7 gpm, which is about the same as last
quarter's, exceeds the high end of the most recently calculated 'background' flow range of 0.63
gpm to 1.34 gpm.
Although TW4-22, TW4-24, TW4-25, and TWN-2 are designated nitrate pumping wells, some
chloroform pumping wells are also located within the nitrate plume because the northwest
portion of the chloroform plume commingles with the central portion of the nitrate plume.
Chloroform pumping well TW 4-19 is periodically within the nitrate plume; chloroform pumping
well TW4-21, since pumping began in 2015, is typically within the nitrate plume; and TW4-37 is
consistently within the nitrate plume. TW4-21 was outside the plume during the second quarter
of 2017; the third quarter of 2018; the first quarter of 2019; the fourth quarter of 2019; the first
quarter of 2020; the first, second and fourth quarters of 2022; and the third and fourth quarters of
2023. Both TW4-19 and TW4-21 are outside the plume this quarter. However, because TW4-19
is located near the plume margin, nitrate plume remediation benefits from pumping TW4-19.
Although periodically within the nitrate plume, due to collapse, TW4-20 was abandoned during
October, 2020.
Because chloroform pumping well TW4-37 is unambiguously within the nitrate plume, and
TW4-21 is typically within the plume and is close to the plume margin this quarter, it is
appropriate to include both in estimating total pumping from the nitrate plume. Including TW 4-
21 and TW4-37, the volume of water removed by TW4-21, TW4-22, TW4-24, TW4-25, TW4-
19
37, and TWN-2 this quarter is approximately 342,666 gallons or approximately 2.6 gpm, which
exceeds the high end of the most recently calculated 'background' flow range by nearly 1.3 gpm,
or a factor of approximately 1. 9.
Because the arithmetic average hydraulic conductivity of a subset of plume wells having the
highest conductivities was used to calculate the high end of the 'background' flow range, the
high end is considered less representative of actual conditions than using the geometric average
conductivity of all of the plume wells. Therefore, nitrate pumping likely exceeds the actual flow
through the plume by more than a factor of 1.9 as calculated above. Nitrate pumping is therefore
considered adequate at the present time even with reduced productivity at TW4-24.
The CAP states that MW-5, MW-11, MW-30 and MW-31 are located downgradient of TW4-22
and TW4-24. MW-30 and MW-31 are within the plume near its downgradient edge and MW-5
and MW-11 are outside and downgradient of the plume. Per the CAP, hydraulic control based on
concentration data will be considered successful if the nitrate concentrations in MW-30 and
MW-31 remain stable or decline, and the nitrate concentrations in downgradient wells MW-5
and MW-11 do not exceed the 10 mg/L standard.
Table 5 presents the nitrate concentration data for MW-30, MW-31, MW-5 and MW-11, which
are down-gradient of pumping wells TW4-22 and TW4-24. Based on these concentration data,
the nitrate plume is under control.
The nitrate plume has not migrated downgradient to MW-5 or MW-11; nitrate at MW-11 was
detected at a concentration of 4.3 mg/L; and was detected at MW-5 last quarter at approximately
0.3 mg/L. Between the previous and current quarters, nitrate concentrations decreased at both
MW-30 and MW-31. Nitrate in MW-30 decreased from approximately 16.7 mg/L to 16.2 mg/L;
and nitrate in MW-31 decreased from 18 mg/L to 17.1 mg/L. Although short-term fluctuations
have occurred, nitrate concentrations in MW-30 and MW-31 have been relatively stable,
demonstrating that plume migration to the south is minimal or absent. However, recent increases
in nitrate at downgradient well MW-11 suggest that downgradient migration is still occurring but
at a low rate.
MW-30 and MW-31 are located at the toe of the nitrate plume which has associated elevated
chloride. Chloride is generally increasing at MW-31, as well as at MW-30, but at a lower rate
(see Tab J and Tab K, discussed in Section 4.2.4). These increases are consistent with continuing
downgradient migration of the elevated chloride associated with the nitrate plume. The increases
in chloride and relatively stable nitrate at both wells suggest a natural attenuation process that is
affecting nitrate but not chloride. A likely process that would degrade nitrate but leave chloride
unaffected is reduction of nitrate by pyrite. The likelihood of this process in the perched zone is
discussed in HGC, December 7 2012; Investigation of Pyrite in the Perched Zone, White Mesa
Uranium Mill Site, Blanding, Utah. A more detailed discussion is presented in the June 21, 2023
CACME Report.
4.2.2 Current Nitrate and Chloride Isoconcentration Maps
Included under Tab I of this Report are current nitrate and chloride iso-concentration maps for
the Mill site. Nitrate iso-contours start at 5 mg/L and chloride iso-contours start at 100 mg/L
20
because those values appear to separate the plumes from background. Except for wells not
sampled this quarter, all nitrate and chloride data used to develop these iso-concentration maps
are from the current quarter's sampling events. During quarters when some wells are not
sampled, the previous quarter's values are used.
4.2.3 Comparison of Areal Extent
Although the plume expanded in some areas and contracted in others, the plume area is larger
than last quarter. Specifically, the plume boundary has expanded toward MW-28 due to the
increase in concentration at this well.
TWN-7, which was incorporated within the plume for the first time during the second quarter of
2018, and was temporarily outside the plume during the fourth quarter of 2021, remains within
the plume this quarter. TWN-7 has historically been located down-to cross-gradient of the
northeastern (upgradient) extremity of the plume, but migration of the plume toward TWN-7 has
been slow presumably due to the low permeability at TWN-7. Relatively recently installed well
TWN-20 bounds the plume to the west ofTWN-7.
TW4-18 remained outside the plume with a concentration of approximately 3.9 mg/L. TW4-18
was encompassed by an eastward-extending 'spur' in the plume during the third quarter of 2015,
similar to an occurrence during the third quarter of 2013. Changes in nitrate concentrations near
TW 4-18 are expected to result from changes in pumping and from the cessation of water
delivery to the northern wildlife ponds. The reduction in low-nitrate recharge from the wildlife
ponds appeared to be having the anticipated effect of generally increased nitrate concentrations
in some wells downgradient of the ponds.
However, decreasing to relatively stable nitrate concentrations at most wells in the vicinity of
TW4-18 between the first quarter of 2014 and the second quarter of 2015 after previous
increases suggested that conditions in this area had stabilized. Since the second quarter of 2015,
concentrations at TW4-18 exceeded 10 mg/L only once (third quarter of 2015). Over this same
time period, concentrations at nearby wells TW4-3 and TW4-9 remained below 10 mg/L;
concentrations at TW4-5 exceeded 10 mg/L only once (first quarter of 2016); and, until the first
quarter of 2019, concentrations at TW4-10 remained above 10 mg/L. Since the first quarter of
2019, concentrations at TW4-10 have remained below 10 mg/L.
Although increases in concentration in the area downgradient of the wildlife ponds have been
anticipated as the result of reduced dilution, the magnitude and timing of the increases are
difficult to predict due to the measured variations in hydraulic conductivity at the site and other
factors. Nitrate in the area directly downgradient (south to south-southwest) of the northern
wildlife ponds is associated with the chloroform plume, is cross-gradient of the nitrate plume as
defined in the CAP, and is within the capture zone of the chloroform pumping system. Perched
water flow in the area is to the southwest in the same approximate direction as the main body of
the nitrate plume.
Nitrate concentrations at the downgradient edge of the plume (MW-3 0 and MW-31) have been
relatively stable, demonstrating that nitrate plume migration to the south is minimal or absent;
however, recent increases in nitrate at downgradient well MW-11 suggest that downgradient
migration is still occurring but at a low rate. As discussed in Section 4.2.1, relatively stable
nitrate at MW-30 and MW-31 is consistent with a natural attenuation process affecting nitrate
21
but not chloride, as elevated chloride associated with the nitrate plume continues to migrate
downgradient.
With regard to chloroform, changes in the boundary of the chloroform plume are attributable in
part to the initiation of nitrate pumping. Once nitrate pumping started, the boundary of the
chloroform plume migrated to the west toward nitrate pumping well TW4-24, and then to the
southwest to reincorporate chloroform monitoring wells TW4-6 and TW4-16. Concentration
increases leading to the reincorporation of these wells occurred first at TW4-24, then at TW4-16
and TW 4-6. Reduced recharge at the southern wildlife pond and decay of the associated
groundwater mound are also expected to influence chloroform concentrations in the vicinity of
TW4-6.
Subsequent contraction of the chloroform plume eastward away from TW4-24 and TW4-16
through the first quarter of 2016 is attributable in part to the start-up of additional chloroform
pumping wells during the first half of 2015, and reduced productivity at TW4-24. TW4-16 is
within and TW4-24 is just within the chloroform plume this quarter. In addition, due to
contraction of the plume away from TW 4-6, TW 4-6 has been outside the plume since the third
quarter of 2018. More details regarding the chloroform data and interpretation are included in the
Quarterly Chloroform Monitoring Report submitted under separate cover.
4.2.4 Nitrate and Chloride Concentration Trend Data and Graphs
Attached under Tab J is a table summarizing values for nitrate and chloride for each well over
time.
Attached under Tab K are graphs showing nitrate and chloride concentration plots in each
monitor well over time.
4.2.5 Interpretation of Analytical Data
Comparing the nitrate analytical results to those of the previous quarter, as summarized in the
tables included under Tab J, the following observations can be made for wells within and
immediately surrounding the nitrate plume:
a) Nitrate concentrations have increased by more than 20% in the following wells
compared to last quarter: MW-28, TW4-22, TW4-24, TW4-25, TW4-37, and TW4-39;
b) Nitrate concentrations have decreased by more than 20% in the following wells
compared to last quarter: MW-26, TW4-21, TWN-1, TWN-4 and TWN-18;
c) Nitrate concentrations have remained within 20% in the following wells compared to
last quarter: MW-11, MW-27, MW-30, MW-31, TW4-16, TW4-18, TW4-19, TWN-2,
TWN-3, TWN-7 and TWN-20;
d) MW-25 and MW-32 remained non-detect; and
e) The concentration at TWN-18 decreased from 0.34 to 0.14 mg/L.
22
As indicated, nitrate concentrations for many of the wells with detected nitrate were within 20%
of the values reported during the previous quarter, suggesting that variations are within the range
typical for sampling and analytical error. The remaining wells had changes in concentration
greater than 20%. The latter includes chloroform pumping wells MW-26, TW4-21, TW4-37 and
TW4-39; nitrate pumping wells TW4-22, TW4-24 and TW4-25; and non-pumping wells MW-
28, TWN-1, TWN-4 and TWN-18. MW-28 is located immediately cross-to downgradient (west)
of the plume; TWN-1 and TWN-4 are located east and generally cross-gradient of the plume;
and TWN-18, which went from 0.34 mg/L to 0.14 mg/Lis located immediately upgradient of the
plume. TWN-1 is also located near chloroform pumping well TW4-21 and nitrate pumping well
TW4-25; and TWN-4 is located adjacent to the northern wildlife ponds.
Fluctuations in concentrations at pumping wells and wells adjacent to pumping wells likely
result in part from the effects of pumping as discussed in Section 4.1.1. Fluctuations in
concentration can also be expected at wells located near the plume margins (such as TWN-4 and
TWN-18). In addition, concentration fluctuations can be expected at wells such as TWN-4
located near formerly used wildlife ponds.
Although quarter to quarter concentration fluctuations occur in individual wells, as discussed in
the June 21, 2023 CACME Report, the overall average nitrate concentration within the plume
has declined. This decline is primarily the result of mass removal by pumping and natural
attenuation.
MW-27, located west of TWN-2; TWN-20, located west of TWN-7; and TWN-18, located north
of TWN-3, bound the nitrate plume to the west and north (See Figure I-1 under Tab I). In
addition, MW-28 and MW-29 bound the plume to the west; and the southernmost
(downgradient) boundary of the plume remains between MW-30/MW-31 and MW-5/MW-11.
Nitrate concentrations at MW-5 (adjacent to MW-11) and MW-11 have historically been low
(typically< 1 mg/L) or non-detect for nitrate; however, since the fourth quarter of 2021, nitrate
at MW-11 has exceeded 1 mg/L and was detected at 4.3 mg/L this quarter (See Table 5). The
nitrate concentrations at MW-5 (approximately 0.29 mg/L last quarter) and MW-11 (4.3 mg/L)
are consistent with the relative stability of the downgradient margin of the nitrate plume;
although recent increases at MW-11 suggest continued, but slow, downgradient plume migration.
MW-25, MW-26, MW-32, TW4-16, TW4-19, TW4-21, TW4-25, TW4-39, TWN-1 and TWN-4
bound the nitrate plume to the east.
Nitrate concentrations outside the nitrate plume are typically greater than 10 mg/L at a few
locations: TW4-12 (approximately 11 mg/L); TW4-26 (10.2 mg/L); TW4-27 (approximately 15
mg/L); and TW4-28 (11.8 mg/L). In the past concentrations at TW4-10 and TW4-38 typically
exceeded 10 mg/L. However, TW4-10 dropped below 10 mg/L during the first quarter of 2019;
and TW4-38 dropped below 10 mg/L during the first quarter of 2018. In addition, TW4-12
remained below 10 mg/L between the second quarter of 2019 and first quarter of 2022.
Concentrations at TW 4-18 have also occasionally exceeded 10 mg/L. Each of these wells is
located southeast of the nitrate plume as defined in the CAP and is separated from the plume by a
well or wells where nitrate concentrations are either non-detect, or, if detected, are less than 10
mg/L. Except for TW4-12, TW4-27 and TW4-28, the nitrate concentrations at all of the above
wells are within 20% of last quarter's concentrations.
23
Since 2010, nitrate concentrations at TW 4-10 and TW 4-18 have been above and below 10 mg/L
Concentrations were below 10 mg/L between the first quarter of 2011 and second quarter of
2013, and mostly close to or above 10 mg/L between the second quarter of 2013 and third
quarter of 2015. However, concentrations at TW4-18 have been below 10 mg/L since the third
quarter of 2015 and ( as discussed above) the concentration at TW 4-10 dropped below 10 mg/L
during the first quarter of 2019. Concentrations at nearby well TW4-5 have exceeded 10 mg/L
only twice since 2010, and concentrations at nearby wells TW4-3 and TW4-9 have remained
below 10 mg/L. Nitrate at TW4-5, TW4-10, and TW4-18 is associated with the chloroform
plume, and is within the capture zone of the chloroform pumping system. Elevated nitrate at
TW4-12, TW4-26, TW4-27, TW4-28 and TW4-38 is likely related to former cattle ranching
operations at the site. Elevated nitrate at relatively recently installed well MW-38 and at MW-20
(far cross-gradient and far downgradient, respectively, of the tailings management system at the
site) is also likely related to former cattle ranching operations.
Chloride concentrations are measured because elevated chloride (greater than 100 mg/L) is
associated with the nitrate plume. Chloride concentrations at all sampled locations this quarter
are within 20% of their respective concentrations during the previous quarter except at
chloroform pumping wells MW-26, TW4-21, TW4-37 and TW4-39; nitrate pumping well TW4-
24; and non-pumping wells TW4-3, TW4-12, TW4-14, TW4-28, TW4-32, TW4-34, TW4-35,
TW4-36, TW4-38 and TW4-42. Except for MW-26 and TW4-21, chloride concentrations
increased at all of these wells.
Non-pumping wells TW4-3, TW4-12, TW4-32 and TW4-38 are in an area impacted by cessation
of water delivery to the northern wildlife ponds; TW4-14 is located adjacent to chloroform
pumping wells TW4-4 and TW4-41; and TW4-42 is located adjacent to chloroform pumping
well TW4-40. TW4-3 is also located near chloroform pumping well TW4-11; and TW4-36 is
located near chloroform pumping wells MW-4, TW4-1 and TW4-2. Concentration fluctuations
at pumping wells and at wells near pumping wells likely result in part from the effects of
pumping as discussed in Section 4.1.1. Concentration fluctuations are also expected at wells
located near the chloride plume margins and at wells affected by former water delivery to the
wildlife ponds.
TWN-7 (located upgradient [north] of the tailings management system) was positioned
historically cross-to downgradient of the upgradient (northeastern) extremities of the
commingled nitrate and chloride plumes. Relatively recent increases in both nitrate and chloride
at TWN-7, which remains incorporated into the chloride and nitrate plumes, likely result from
northwesterly migration of the elevated nitrate and chloride contained within the upgradient
extremities of these commingled plumes. The change in chloride at TWN-7 since last quarter is
less than 20%.
Piezometer PIEZ-3A was installed in the second quarter of 2016 as a replacement to piezometer
PIEZ-3. The chloride concentration at piezometer PIEZ-3A (nearly 81 mg/L) is more than twice
as high this quarter than the pre-abandonment first quarter 2016 concentration at PIEZ-3
(approximately 33 mg/L). The nitrate concentration at PIEZ-3A (approximately 13 mg/L) is also
higher this quarter than the pre-abandonment first quarter 2016 PIEZ-3 concentration
(approximately 2.2 mg/L).
24
4.3 Estimation of Pumped Nitrate Mass and Residual Nitrate Mass within the Plume
Nitrate mass removed by pumping as summarized in Table 2 includes mass removed by both
chloroform and nitrate pumping wells. Table 3 shows the volume of water pumped at each well
and Table 4 provides the details of the nitrate removal for each well.
Mass removal calculations begin with the third quarter of 2010 because the second quarter, 2010
data were specified to be used to establish a baseline mass for the nitrate plume. As stated in the
CAP, the baseline mass is to be calculated using the second quarter, 2010 concentration and
saturated thickness data "within the area of the kriged 10 mg/L plume boundary." The second
quarter, 2010 data set was considered appropriate because "the second quarter, 2010
concentration peak at TWN-2 likely identifies a high concentration zone that still exists but has
migrated away from the immediate vicinity of TWN-2."
As shown in Table 2, since the third quarter of 2010, a total of approximately 4,310 lb. of nitrate
has been removed directly from the perched zone by pumping. Prior to the first quarter of 2013,
all direct nitrate mass removal resulted from operation of chloroform pumping wells MW-4,
MW-26, TW4-4, TW4-19, and TW4-20. During the current quarter:
• A total of approximately 60.5 lb. of nitrate was removed by the chloroform pumping
wells and by nitrate pumping wells TW4-22, TW4-24, TW4-25, and TWN-2.
• Of the 60.5 lb. removed during the current quarter, approximately 38 lb. (or 63 %) was
removed by the nitrate pumping wells.
The calculated nitrate mass removed directly by pumping 1s larger than last quarter's
approximately 46 lbs.
As discussed in Section 4.3.1, achievable pumping rates are expected to diminish over time as
saturated thicknesses are reduced by pumping and by cessation of water delivery to the northern
wildlife ponds. Attachment N (Tab N) of the third quarter 2015 Nitrate Monitoring report
provides an evaluation of reduced productivity at chloroform pumping well TW 4-19 and nitrate
pumping well TW4-24.
Baseline mass and current quarter mass estimates (nitrate+ nitrite as N) for the nitrate plume are
approximately 43,700 lb. and 29.939 lbs., respectively. Mass estimates were calculated within
the plume boundaries as defined by the kriged 10 mg/L isocon by 1) gridding (kriging) the
nitrate concentration data on 50-foot centers; 2) calculating the volume of water in each grid cell
based on the saturated thickness and assuming a porosity of 0.18; 3) calculating the mass of
nitrate+nitrite as N in each cell based on the concentration and volume of water for each cell; and
4) totaling the mass of all grid cells within the 10 mg/L plume boundary. Data used in these
calculations included data from wells listed in Table 3 of the CAP.
The nitrate mass estimate for the current quarter (29.939 lb.) is larger than the mass estimate for
the previous quarter (25,500 lb.) by 4,439 lb. Since pumping began, calculated nitrate mass
within the plume has generally decreased at a rate that is on average higher than would be
expected based on direct mass removal by pumping. Changes in the quarterly mass estimates are
expected to result from several factors, primarily 1) nitrate mass removed directly by pumping,
25
2) natural attenuation of nitrate, and 3) re-distribution of nitrate within the plume and changes in
saturated thicknesses.
Nitrate mass removed by pumping and natural attenuation ( expected to result primarily from
pyrite oxidation/nitrate reduction) act to lower both nitrate mass and concentrations within the
plume. Both mechanisms are expected to continuously reduce both nitrate mass and
concentrations within the plume. Reductions in saturated thickness that are not accompanied by
increases in concentration will also reduce nitrate mass within the plume.
However, redistribution of nitrate within the plume is expected to result in both increases and
decreases in concentrations at wells within the plume and therefore increases and decreases in
mass estimates based on those concentrations, thus generating 'noise' in the mass estimates. In
addition, because the sum of sampling and analytical error is typically about 20%, changes in the
mass estimates from quarter to quarter of up to 20% could result from typical sampling and
analytical error alone.
Furthermore, redistribution of nitrate within the plume and changes in saturated thicknesses will
be impacted by changes in pumping and in background conditions such as the decay of the
perched water mound associated with the northern wildlife ponds. Cessation of water delivery to
the northern wildlife ponds is expected to result in reduced saturated thicknesses and reduced
dilution, which in tum is expected to result in increased nitrate concentrations in many wells.
Because of quarter to quarter variations in factors that impact the mass estimates, only longer-
term analyses of the mass estimates that minimize the impacts of 'noise' can provide useful
information on plume mass trends. Over the long term, nitrate mass estimates are expected to
trend downward as a result of direct removal by pumping and through natural attenuation. The
increase in the mass estimate this quarter is attributable in part to the increased concentrations at
nitrate pumping wells TW4-22, TW4-24 and chloroform pumping well TW4-37. An increase in
concentration at MW-28 (located just outside and west of the plume), which caused the plume
boundary to expand toward MW-28, also contributed to the increase in the mass estimate.
As specified in the CAP, once eight quarters of data were collected (starting with the first quarter
of 2013), a regression trend line was to be applied to the quarterly mass estimates and evaluated.
The trend line was to be updated quarterly and reevaluated as additional quarters of data were
collected. The evaluation was to determine whether the mass estimates were increasing,
decreasing, or stable.
As the fourth quarter of 2014 constituted the eighth quarter as specified in the CAP, the mass
estimates were plotted, and a regression line was fitted to the data and evaluated. The regression
line has been updated each quarter since the fourth quarter of 2014 as shown in Figure M.1 of
Tab M. The fitted line shows a decreasing trend in the mass estimates.
26
5.0 LONG TERM PUMP TEST AT TWN-02, TW4-22, TW4-24, and TW4-
25 OPERATIONS REPORT
5.1 Introduction
Beginning in January 2013, EFRI began long term pumping ofTW4-22, TW4-24, TW4-25, and
TWN-02 as required by the Nitrate CAP, dated May 7, 2012 and the SCO dated December 12,
2012.
In addition, as a part of the investigation of chloroform contamination at the Mill site, EFRI has
been conducting a Long Term Pump Test on MW-4, TW4-19, MW-26, and TW4-20, and, since
January 31, 2010, TW4-4. In anticipation of the final approval of the GCAP, beginning on
January 14, 2015, EFRI began long term pumping of TW4-1, TW4-2, and TW4-11 and began
long term pumping of TW4-21 and TW4-37 on June 9, 2015. In addition, EFRI is pumping
TW4-39, TW4-40 and TW4-41. The purpose of the test is to serve as an interim action that will
remove a significant amount of chloroform-contaminated water while gathering additional data
on hydraulic properties in the area of investigation. TW4-20 collapsed in August of 2020 and
was abandoned in October 2020.
Because wells MW-4, TW4-19, MW-26, TW4-4, TW4-01, TW4-02, TW4-11, TW4-21, TW4-
37, TW4-39, TW4-40 and TW4-41 are pumping wells that may impact the removal of nitrate,
they are included in this report and any nitrate removal realized as part of this pumping is
calculated and included in the quarterly reports.
The following information documents the operational activities during the quarter.
5.2 Pumping Well Data Collection
Data collected during the quarter included the following:
• Measurement of water levels at MW-4, TW4-19, MW-26, and, commencmg
regularly on March 1, 2010, TW 4-4, on a weekly basis,
• Measurement of water levels weekly at TW4-22, TW4-24, TW4-25, and TWN-02
commencing January 28, 2013,
• Measurement of water levels weekly at TW4-01, TW4-02, and TW4-11
commencing on January 14, 2015,
• Measurement of water levels weekly at TW4-21 and TW4-37 commencing on
June 9, 2015, and on a monthly basis selected temporary wells and permanent
monitoring well,
• Measurement of water levels weekly at TW4-39 commencing on December 7,
2016,
• Measurement of water levels weekly at TW4-41 commencing on April 3, 2018,
• Measurement of water levels weekly at TW4-40 commencing on May 13, 2019.
• Measurement of pumping history, including:
-pumping rates
-total pumped volume
27
-operational and non-operational periods.
• Periodic sampling of pumped water for chloroform and nitrate/nitrite analysis and
other constituents
5.3 Water Level Measurements
Beginning August 16, 2003, water level measurements from chloroform pumping wells MW-4,
MW-26, and TW4-19 were conducted weekly. From commencement of pumping and regularly
after March 1, 2010 water levels in these chloroform pumping wells have been measured weekly.
From commencement of pumping in January 2013, water levels in wells TW4-22, TW4-24,
TW4-25, and TWN-02 have been measured weekly. From the commencement of pumping in
December 2016, water levels in TW4-39 have been measured; from the commencement of
pumping in April 2018 water levels in TW4-41 have been measured and from the
commencement of pumping in May 2019 water levels in TW 4-40 have been measured weekly.
Copies of the weekly Depth to Water monitoring sheets for MW-4, MW-26, TW4-19, TW4-4,
TW4-22, TW4-24, TW4-25, TWN-02, TW4-0l, TW4-02, TW4-11, TW4-21, TW4-37, TW4-39,
TW4-40, and TW4-41 are included under Tab C.
Monthly depth to water monitoring is required for all of the chloroform contaminant
investigation wells and non-pumping wells MW-27, MW-30, MW-31, TWN-1, TWN-3, TWN-
4, TWN-7, and TWN-18. Copies of the monthly depth to Water monitoring sheets are included
under Tab C.
5.4 Pumping Rates and Volumes
The pumping wells do not pump continuously, but are on a delay device. The wells purge for a
set amount of time and then shut off to allow the well to recharge. Water from the pumping wells
is either transferred to the Cell 1 evaporation pond or is used in the Mill process.
The pumped wells are fitted with a flow meter which records the volume of water pumped from
the well in gallons. The flow meter readings shown in Tab Care used to calculate the gallons of
water pumped from the wells each quarter as required by Section 7.2.2 of the CAP. The average
pumping rates and quarterly volumes for each of the pumping wells are shown in Table 3. The
cumulative volume of water pumped from each of the wells is shown in Table 4.
Specific operational problems observed with the well(s) or pumping equipment which occurred
during the quarter are noted below.
Unless specifically noted below, no operational problems were observed with the well or
pumping equipment during the quarter.
5.4.1 TW4-39
During the routine check on February 19, 2024, the totalizing meter in TW4-39 malfunctioned.
All ancillary systems were checked, and it was determined that the totalizing meter was
28
malfunctioning and could not be repaired. The totalizing meter was removed and replaced
within 24 hours of discovery and as such no notifications were necessary.
6.0 CORRECTIVE ACTION REPORT
There are no corrective actions required during the current monitoring period.
6.1 Assessment of Previous Quarter's Corrective Actions
There were no corrective actions required during the previous quarter's monitoring period.
7.0 CONCLUSIONS AND RECOMMENDATIONS
As per the CAP, the fourth quarter of 2013 was the first quarter that hydraulic capture associated
with nitrate pumping wells TW4-22, TW4-24, TW4-25, and TWN-2 was evaluated. Since then,
quarterly evaluation of hydraulic capture resulting from both nitrate and chloroform pumping has
been performed. Evaluation of hydraulic capture during the current quarter indicates that, while
both increases and decreases in drawdown occurred in chloroform and nitrate pumping wells, the
overall capture area this quarter is larger than last quarter's.
Capture associated with nitrate pumping wells is expected to increase over time as water levels
decline due to pumping and due to cessation of water delivery to the northern wildlife ponds.
Nitrate capture is enhanced by the interaction of the nitrate pumping system with the chloroform
pumping system. Chloroform pumping wells located within or adjacent to the nitrate plume not
only increase overall capture, but account for much of the nitrate mass removed each quarter.
The long term interaction between nitrate and chloroform pumping systems is evolving as
revealed by data collected as part of routine monitoring. Slow development of hydraulic capture
by the nitrate pumping system was expected and is consistent with the relatively low
permeability of the perched zone at the site.
The capture associated with the nitrate pumping system has been impacted by the perched
groundwater mound and historically relatively low water levels at TWN-7. Although the perched
groundwater mound has diminished, and water levels at TWN-7 have risen, definition of capture
associated with the nitrate pumping system continues to be influenced by the remaining perched
groundwater mound and the relatively low water level at TWN-7.
Nitrate pumping is likely sufficient to eventually capture the entire nitrate plume upgradient of
TW4-22 and TW4-24 even with reduced productivity at TW4-24 since the third quarter of 2014.
Hydraulic gradients and saturated thicknesses within the plume have declined since nitrate
pumping began as a result of two factors: reduced recharge from the ponds, and nitrate pumping.
A more representative 'background' flow condition that accounts for reduced wildlife pond
recharge was presented in Attachment N (Tab N) of the third quarter, 2015 Nitrate Monitoring
report. The original pre-pumping 'background' flow range of 1.31 gpm to 2.79 gpm was
recalculated to range from 0. 79 gpm to 1.67 gpm. This calculation was still considered
conservative because the high end of the calculated range assumed an arithmetic average
hydraulic conductivity of a subset of plume wells having the highest conductivities.
29
However, since recalculation of the 'background' flow in 2015, saturated thicknesses and
hydraulic gradients within the plume have continued to decline, further reducing the rate of flow
through the plume. To account for this additional reduction, the 'background' flow was
recalculated to range from 0.63 gpm to 1.34 gpm, as presented in HGC, June 21, 2023; Nitrate
Corrective Action Comprehensive Monitoring Evaluation (CACME) Report, White Mesa
Uranium Mill Near Blanding, Utah.
The current nitrate pumping of approximately 1.7 gpm, based on water removed by TW4-22,
TW4-24, TW4-25, and TWN-2, exceeds the high end of the most recently calculated
'background' flow range of 0.63 gpm to 1.34 gpm.
If water removed from the nitrate plume by chloroform pumping wells TW4-21 and TW4-37 is
included, the current nitrate pumping of approximately 2.6 gpm exceeds the most recently
calculated 'background' flow range by approximately 1.3 gpm, or a factor of approximately 1.9.
Including TW4-37 is appropriate because this well has been within the nitrate plume consistently
since initiation of pumping in 2015. Including TW4-21 is also appropriate because TW4-21 is
typically within the plume and is close to the plume margin this quarter.
In addition, because the arithmetic average hydraulic conductivity of a subset of plume wells
having the highest conductivities was used in recalculating the high end of the 'background' flow
range, the high end is considered less representative of actual conditions than using the
geometric average conductivity of all of the plume wells. Therefore, nitrate pumping likely
exceeds flow through the plume by a factor greater than 1.9 as calculated above. Nitrate pumping
is considered adequate at the present time even with reduced productivity at TW4-24.
Furthermore, as the groundwater mound associated with former water delivery to the northern
wildlife ponds continues to decay, hydraulic gradients and saturated thicknesses will continue to
decrease, and 'background' flow will be proportionally reduced, thereby reducing the amount of
pumping needed.
This quarter nitrate concentrations at many of the wells within and adjacent to the nitrate plume
were within 20% of the values reported during the previous quarter, suggesting that variations
are within the range typical for sampling and analytical error. Changes in concentration (both
increases and decreases) greater than 20% also typically occur in many wells. This quarter,
changes greater than 20% occurred in chloroform pumping wells MW-26, TW4-21, TW4-37 and
TW4-39; nitrate pumping wells TW4-22, TW4-24 and TW4-25; and non-pumping wells MW-
28, TWN-1, TWN-4 and TWN-18. MW-28 is located immediately cross-to downgradient (west)
of the plume; TWN-1 and TWN-4 are located east and generally cross-gradient of the plume;
and TWN-18, which went from 0.34 mg/L to 0.14 mg/L, is located immediately upgradient of
the plume. TWN-1 is also located near chloroform pumping well TW4-21 and nitrate pumping
well TW4-25; and TWN-4 is located adjacent to the northern wildlife ponds.
Fluctuations in concentrations at pumping wells and wells adjacent to pumping wells likely
result in part from the effects of pumping as discussed in Section 4.1.1. Fluctuations in
concentration can also be expected at wells located near the plume margins (such as TWN-4 and
TWN-18). In addition, concentration fluctuations can be expected at wells such as TWN-4
located near formerly used wildlife ponds. Concentrations at MW-25 and MW-32 remained non-
detect.
30
As discussed in Section 4.2.3, although the plume expanded in some areas and contracted in
others, the plume area is larger than last quarter. Specifically, the plume boundary has expanded
towards MW-28 due to the increase in concentration at this well.
MW-27, located west ofTWN-2; TWN-20, located west ofTWN-7; and TWN-18, located north
of TWN-3, bound the nitrate plume to the west and north. During the second quarter of 2021,
TWN-20 was installed west ofTWN-7 because TWN-7 no longer bounded the plume to the west
(see Figure I-1 under Tab I). In addition, the southernmost (downgradient) boundary of the
plume remains between MW-30/MW-31 and MW-5/MW-1 l. Nitrate concentrations at MW-5
(adjacent to MW-11) and MW-11 have historically been low (typically< 1 mg/L) or non-detect
for nitrate; however, since the fourth quarter of 2021, nitrate at MW-11 has exceeded 1 mg/Land
was detected at approximately 4.3 mg/L this quarter (See Table 5). The nitrate concentrations at
MW-11 are consistent with the relative stability of the downgradient margin of the nitrate
plume; however, the recent increases at MW-11 suggest that downgradient migration is still
occurring but at a low rate. MW-25, MW-26, MW-32, TW4-16, TW4-19, TW4-21, TW4-25,
TW4-39, TWN-1 and TWN-4 bound the nitrate plume to the east.
Although short-term fluctuations have occurred, nitrate concentrations in MW-30 and MW-31
have been relatively stable, demonstrating that plume migration is minimal or absent. Nitrate
concentrations decreased at both MW-30 and MW-31. Nitrate in MW-30 decreased from
approximately 16.7 mg/L to 16.2 mg/L; and nitrate in MW-31 decreased from 18 mg/L to 17.1
mg/L. Based on the' concentration data at MW-5, MW-11, MW-30, and MW-31, the nitrate
plume is under control; although, as discussed above, recent increases in nitrate at downgradient
well MW-11 suggest that slow downgradient migration is still occurring.
Chloride is increasing at MW-31 and at MW-30, but at a lower rate. These increases are
consistent with continuing downgradient migration of the elevated chloride associated with the
nitrate plume. The increasing chloride and relatively stable nitrate at both wells suggests a
natural attenuation process that is affecting nitrate but not chloride. A likely process that would
degrade nitrate but leave chloride unaffected is reduction of nitrate by pyrite. The likelihood of
this process in the perched zone is discussed in HGC, December 7 2012; Investigation of Pyrite
in the Perched Zone, White Mesa Uranium Mill Site, Blanding, Utah. A more detailed discussion
is presented in the June 21, 2023 CACME Report.
Nitrate mass within the plume boundary has been calculated on a quarterly basis beginning with
the first quarter of 2013. Calculated mass within the plume is expected to be impacted by factors
that include pumping, natural attenuation, redistribution of nitrate within the plume, and changes
in saturated thickness.
Nitrate mass removal by pumping and natural attenuation ( expected to result primarily from
pyrite oxidation/nitrate reduction) act to lower nitrate mass within the plume. Reductions in
saturated thickness that are not accompanied by increases in concentration will also reduce
nitrate mass within the plume.
Changes resulting from redistribution of nitrate within the plume are expected to result in both
increases and decreases in concentrations at wells within the plume and therefore increases and
31
decreases in mass estimates based on those concentrations, thus generating 'noise' in the mass
estimates. Furthermore, because the sum of sampling and analytical error is typically about 20%,
changes in the mass estimates from quarter to quarter of up to 20% could result from typical
sampling and analytical error alone. Longer-term analyses of the mass estimates that minimize
the impact of these quarter to quarter variations are expected to provide useful information on
plume mass trends. Over the long term, nitrate mass estimates are expected to trend downward as
a result of direct removal by pumping and through natural attenuation.
As specified in the CAP, once eight quarters of data were collected (starting with the first quarter
of 2013), a regression trend line was to be applied to the quarterly mass estimates and evaluated.
The trend line was to be updated quarterly and reevaluated as additional quarters of data were
collected. As the fourth quarter of 2014 constituted the eighth quarter as specified in the CAP,
the mass estimates were plotted, and a regression line was fitted to the data and evaluated. The
regression line was updated this quarter as shown in Figure M.1 of Tab M. The fitted line shows
a decreasing trend in the mass estimates.
During the current quarter, a total of approximately 60.5 lb. of nitrate was removed by the
chloroform pumping wells and by nitrate pumping wells TW4-22, TW4-24, TW4-25, and TWN-
2. Of the 60.5 lb. removed during the current quarter, approximately 38 lb. (or 63%) was
removed by the nitrate pumping wells.
The baseline nitrate (nitrate+nitrite as N) plume mass calculated as specified in the CAP (based
on second quarter, 2010 data) was approximately 43,700 lb. The mass estimate for the current
quarter (29,939 lb.) is larger than the mass estimate for the previous quarter (25,500 lb.) by 4,439
lb or approximately 17 %. The current quarter's estimate is smaller than the baseline estimate by
approximately 13,760 lb. The quarterly difference is attributable primarily to the increased
concentrations at nitrate pumping wells TW4-22 and TW4-24; and chloroform pumping well
TW4-37. The concentration at bounding well MW-28 increased this quarter; however MW-28
remains outside the plume.
Nitrate concentrations outside the nitrate plume are typically greater than 10 mg/L at a few
locations: TW4-12 (approximately 11 mg/L); TW4-26 (10.2 mg/L); TW4-27 (approximately 15
mg/L); and TW4-28 (11.8 mg/L). In the past concentrations at TW4-10 and TW4-38 typically
exceeded 10 mg/L. However, TW4-10 dropped below 10 mg/L during the first quarter of 2019;
and TW4-38 dropped below 10 mg/L during the first quarter of 2018. In addition, TW4-12
remained below 10 mg/L between the second quarter of 2019 and first quarter of 2022.
Concentrations at TW 4-18 have also occasionally exceeded 10 mg/L. Each of these wells is
located southeast of the nitrate plume as defined in the CAP and is separated from the plume by a
well or wells where nitrate concentrations are either non-detect, or, if detected, are less than 10
mg/L. Except for TW4-12, TW4-27 and TW4-28, the nitrate concentrations at all of the above
wells are within 20% oflast quarter's concentrations.
Since 2010, nitrate concentrations at TW4-10 and TW4-18 have been above and below 10 mg/L.
Concentrations were below 10 mg/L between the first quarter of 2011 and second quarter of
2013, and mostly close to or above 10 mg/L between the second quarter of 2013 and third
quarter of 2015. However, concentrations at TW4-18 have been below 10 mg/L since the third
quarter of 2015 and (as discussed above) the concentration at TW4-10 dropped below 10 mg/L
32
during the first quarter of 2019. Concentrations at nearby well TW 4-5 have exceeded 10 mg/L
only twice since 2010, and concentrations at nearby wells TW4-3 and TW4-9 have remained
below 10 mg/L. Nitrate at TW4-5, TW4-10, and TW4-18 is associated with the chloroform
plume, and is within the capture zone of the chloroform pumping system. Elevated nitrate at
TW4-12, TW4-26, TW4-27, TW4-28, and TW4-38 is likely related to former cattle ranching
operations at the site. Elevated nitrate at relatively recently installed well MW-38 and at MW-20
(far cross-gradient and far downgradient, respectively, of the tailings management system at the
site) is also likely related to former cattle ranching operations.
Increases in both nitrate and chloride concentrations at wells near the northern wildlife ponds
(for example TW4-18) were anticipated as a result of reduced dilution caused by cessation of
water delivery to the northern wildlife ponds. However, decreasing nitrate concentrations at
TW4-10 and TW4-18 from the first through third quarters of 2014 after previously increasing
trends (interrupted in the first quarter of 2014) suggested that conditions in this area had
stabilized. The temporary increase in nitrate concentration at TW4-18 in the third quarter of 2015
and the generally increased nitrate at TW 4-5 and TW 4-10 during the three quarters following the
second quarter of 2015 suggested the continuing impact of reduced wildlife pond recharge on
downgradient wells. However, since the first quarter of 2016, concentrations at TW4-5, TW4-10
and TW 4-18 have generally been stable to decreasing.
EFRI and its consultants have raised the issues and potential effects associated with cessation of
water delivery to the northern wildlife ponds in March 2012 during discussions with DWMRC in
March 2012 and May 2013. While past recharge from the northern wildlife ponds has helped
limit many constituent concentrations within the chloroform and nitrate plumes by dilution, the
associated groundwater mounding has increased hydraulic gradients and contributed to plume
migration. Since use of the northern wildlife ponds ceased in March 2012, the reduction in
recharge and decay of the associated groundwater mound was expected to increase many
constituent concentrations within the plumes while reducing hydraulic gradients and rates of
plume migration. Reduced recharge and decay of the groundwater mound associated with the
southern wildlife pond is also expected to have an impact on water levels and concentrations at
wells within and marginal to the downgradient (southern) extremity of the chloroform plume.
The net impact of reduced wildlife pond recharge was expected to be beneficial even though
temporarily higher concentrations were also expected until continued mass reduction via
pumping and natural attenuation ultimately reduced concentrations. Temporary increases in
nitrate concentrations were judged less important than reduced nitrate migration rates; and, as
discussed in the June 21, 2023 CACME Report, the average plume nitrate concentration has
declined. Future impacts of reduced recharge, pumping and natural attenuation on plume
concentrations and migration rates will be defined by continued monitoring.
Nitrate mass removal from the perched zone was increased substantially by the start-up of nitrate
pumping wells TW4-22, TW4-24, TW4-25, and TWN-2 during the first quarter of 2013.
Continued operation of these wells is therefore recommended. Pumping these wells, regardless
of any short term fluctuations in concentrations detected at the wells, helps to reduce
downgradient nitrate migration by removing nitrate mass and reducing average hydraulic
gradients, thereby allowing natural attenuation to be more effective. Continued operation of the
33
nitrate pumping system is expected to continue to reduce the average plume nitrate concentration
and to further reduce or halt downgradient nitrate migration.
8.0 ELECTRONIC DATA FILES AND FORMAT
EFRI has provided to the Director an electronic copy of all laboratory results for groundwater
quality monitoring conducted under the nitrate contaminant investigation during the quarter, in
Comma Separated Values ("CSV") format. A copy of the transmittal e-mail is included under
TabL.
34
9.0 SIGNATURE AND CERTIFICATION
This document was prepared by Energy Fuels Resources (USA) Inc.
Energy Fuels Resources (USA) Inc.
By:
Scott A. Bakken
Vice President, Regulatory Affairs
35
Certification:
I certify, under penalty of law, that this document and all attachments were prepared
under my direction or supervision in accordance with a system designed to assure that qualified
personnel properly gather and evaluate the information submitted. Based on my inquiry of the
person or persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations.
Scott Bakken
Vice President, Regulatory Affairs
Energy Fuels Resources (USA) Inc.
36
Tables
Table 1
Summary of Well Sampling and Constituents for the Period
Sample Collection
Well ..Pate, Date Qf Lab Report
Piezometer-01 2/15/2024 2/27/2024
Piezometer-02 2/15/2024 2/27/2024
Piezometer-03A 2/15/2024 2/27/2024
TWN-01 2/14/2024 2/27/2024
TWiN -O2 = -,_ 2/1412 0.,24 '2/27,Jli,02'4.
TWN-03 2/15/2024 2/27/2024
TWN-04 2/14/2024 2/27/2024
TWN-07 2/15/2024 2/27/2024
TWN-18 2/14/2024 2/27/2024
TWN-18R 2/14/2024 2/27/2024
TWN-20 2/15/2024 2/27/2024
TWN-21 2/15/2024 2/27/2024
'FW4e22 212-112:024 3JW2 Q24
TW.4-2~ 2l.2 1b2Q2 ~ 3/1/2024
'l'W+i~ 2121/~0,24 31/912024
TWN-60 2/15/2024 2/27/2024
TW4-60 2/22/2024 3/7/2024
TWN-65 2/14/2024 2/27/2024
Note: All wells were sampled for Nitrate and Chloride.
Multiple dates shown for a single laboratory depict resubmission dates for the data. Resubmissions were required to correct reporting errors.
Dates in Italics are the original laboratory submission dates.
TWN-60 is a DI Field Blank.
TWN-65 is a duplicate of TWN-04
TW4-60 is the chloroform program DI Field Blank.
C.ontirfuous1y pum-J)M we.II .
Table 2
Nitrate Mass Removal Per Well Per Quarter -
MW-4 MW-26 TW4-19 TW4-20 TW4-4 TW4-22 TW4-24 TW4-25 TWN-02 TW4-01 TW4-02 TW4-11 TW4-21 TW4-37 TW4-39 TW4-40 TW4-41 Qtr.
Quarter (lbs.) (lbs.) (lbs,) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) Totals
(lbs.)
2 3.20 0.3 5.8 1.7 4.7 NA NA NA NA NA NA NA NA NA NA NA NA 15.69
Q4 2010 3.76 0.4 17.3 1.4 5.1 NA NA NA NA NA NA NA NA NA NA NA NA 27 .97
QI 2011 2.93 0.2 64.5 1.4 4.3 NA NA NA NA NA NA NA NA NA NA NA NA 73.30
Q2 201 I 3.51 0.1 15.9 2.7 4 .7 NA NA NA NA NA NA NA NA NA NA NA NA 27.01
Q3 2011 3.49 0.5 3.5 3.9 5.4 NA NA NA NA NA NA NA NA NA NA NA NA 16 .82
Q4 2011 3.82 0.8 6.2 2.5 6.4 NA NA NA NA NA NA NA NA NA NA NA NA 19 .71
QI 2012 3.62 0.4 0.7 5.0 6.0 NA NA NA NA NA NA NA NA NA NA NA NA 15.86
Q2 2012 3.72 0 ,6 3.4 2.1 5.2 NA NA NA NA NA NA NA NA NA NA NA NA 15 ,03
Q3 2012 3.82 0.5 3.6 2.0 4.7 NA NA NA NA NA NA NA NA NA NA NA NA 14.67
Q4 2012 3.16 0.4 5.4 1.8 4.2 NA NA NA NA NA NA NA NA NA NA NA NA 14 .92
QI 2013 2.51 0.4 14.1 1.4 3.6 8,1 43.4 7.5 14.8 NA NA NA NA NA NA NA NA 95.73
Q2 2013 2.51 0.4 5.6 l.6 3.4 10.7 37.1 6.4 23 .9 NA NA NA NA NA NA NA NA 91.71
Q3 2013 2.97 0.4 48.4 1.4 3.8 6.3 72.8 6.9 33.4 NA NA NA NA NA NA NA NA 176 .53
Q4 2013 3.08 0.3 15.8 1.6 3.9 9.4 75.2 6.4 46 .3 NA NA NA NA NA NA NA NA 162.07
QI 2014 2.74 0.4 4.1 1.2 3.6 11.2 60.4 2.3 17 .2 NA NA NA NA NA NA NA NA 103.14
Q2 2014 2.45 0.3 3.3 0.9 3.0 9.5 63.4 1.3 17.8 NA NA NA NA NA NA NA NA 101.87
Q3 2014 2.31 0 .1 4.1 0.6 3.1 8,5 56.2 1.6 16.4 NA NA NA NA NA NA NA NA 92.99
Q4 2014 2.67 0.2 7.8 1.0 3.8 11.0 53.2 0.9 28.0 NA NA NA NA NA NA NA NA 108.57
QI 2015 3.67 0.5 4.3 1.3 2.4 12.7 26.7 8.6 19.2 1.45 1.07 0.72 NA NA NA NA NA 82.61
Q2 2015 1.28 0.2 0.6 0.9 3.6 9.1 16.6 0.9 21.4 1.22 0.79 0.37 3.4 8.6 NA NA NA 68.86
Q3 2015 3.58 0.3 11.3 1.4 3.5 13.3 14.0 1.7 20 .2 1.24 0.68 0.29 15.4 31.9 NA NA NA 118.63
Q4 2015 3.68 0.2 10.0 0.8 3.1 11.1 26.6 1.7 17 .5 0.3 0,9 0.3 16.1 32.3 NA NA NA 124.50
QI 2016 3.91 0.23 15.28 1.23 3.21 6.36 24.30 0.81 34 .33 0.02 0.93 0.22 15.29 26.45 NA NA NA 132.55
Q2 2016 3.66 0.21 1.31 1.48 3.36 12 .92 13.17 1.01 19 .24 0.02 1.15 0.25 14.46 27.76 NA NA NA 99.98
Q3 2016 3.30 0.22 9.08 1.15 3.02 11.33 14.86 1.56 12.47 0.72 0.59 0.22 15 .20 27.42 NA NA NA 101.12
Q4 2016 3.48 0.18 8.76 1.23 1.79 12 .14 26.49 1.02 12.14 0.10 1.00 0.23 14.68 22.20 0 .62 NA NA 106.06
QI 2017 3.19 0.17 10.23 1.36 1.35 14 .02 34.16 0.02 10.35 0.63 0.79 0.20 8.02 26.16 5.54 NA NA 116.19
Q2 2017 2.94 0.20 0.22 1.02 1.37 13 .99 17.58 0.83 8.88 0.87 0.77 0.19 4.85 24.26 2.15 NA NA 80.12
Q3 2017 3.65 0.36 1.05 1.31 1.29 13.56 18.55 1.27 9.31 0.73 0.82 0.18 18.24 20.81 2.23 NA NA 93.37
Q4 2017 4.67 0.23 0.34 1.06 1.32 15 .89 28.04 1.26 10.37 0.68 0.47 0.17 17.84 22.35 1.51 NA NA 106.21
QI 2018 3.92 0.35 7.89 1.13 1.18 12.47 36.31 2.18 7.09 0.51 0.40 0.17 15.54 21.22 1.65 NA NA 111.99
Q2 2018 3.94 0.20 0.46 1.16 0.96 14.07 14.89 1.12 7.22 0.40 0.47 0.16 13 .73 19.96 1.38 NA 4.02 84.14
Q3 2018 3.63 0.60 2.25 0.85 0.78 9.82 14 .99 0.75 6.48 0.35 0 .60 0.13 0.22 16.42 1.69 NA 2.30 61.86
Q4 2018 3.81 0.39 0.21 1.04 0.77 15.27 32.56 0.61 6.30 0.38 0.45 0.14 15.43 17.38 1.97 NA 1.78 98.49
QI 2019 4.71 0.41 6.38 0.82 1.01 15.69 32 .04 0.48 7.10 0.40 0 .53 0.15 9 .25 19.49 0.85 NA 1.79 101.08
Q2 2019 4.07 0.57 7.53 1.08 1.24 16.15 14.74 0.60 16.35 0.11 0.51 0.15 15.61 16.91 2.42 2.4 1.26 101.72
Q3 2019 3.74 0.62 0.28 1.17 0.77 14.95 16.54 0.40 8.01 0.13 0.56 0.12 13.26 14.55 0.54 3.3 1.25 80.19
Q4 2019 3.59 0.18 0.44 0.68 0.78 12.02 28 .83 0,60 5.17 0.30 0.40 0.12 5.55 14 .20 0.41 2.6 1.08 76.97
QI 2020 5.33 0.24 8.16 0.78 0.55 11.91 26.73 0.43 4.44 0.38 0.67 0.11 7.95 15.48 0.29 2.5 0.88 86 .86
Q2 2020 4.28 0.62 1.30 6.08 0.93 12.77 20.05 0.64 4.04 0.04 0.43 0.13 14.26 15.39 1.56 2.4 0.98 85.95
Q3 2020 3.48 0.08 14.96 0.00 0.85 12.46 17.40 0.70 3.05 0.18 0.39 0.11 10.46 13.95 0.80 2.1 0.75 81.69
Q4 2020 3.52 0.87 1.33 0 .00 0.85 12.38 31.15 1.18 2.57 0.33 0.28 0.08 14.56 14.69 2.75 1.7 0.93 89 .15
QI 2021 3.60 0.08 7.36 0.00 0 .77 13.13 28.63 2.30 3.00 0.21 0.36 0.13 12 .33 13.45 0 .69 1.5 0.72 88.22
Table 2
Nitrate Mass Removal Per Well Per Quarter -
MW-4 MW-26 TW4-19 TW4-20 TW4-4 TW4-22 TW4-24 TW4-25 TWN-02 TW4-01 TW4-02 TW4-ll TW4-21 TW4-37 TW4-39 TW4-40 TW4-41 Qtr.
Quarter
(lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) Totals
(lbs.)
Q2 2021 5.04 0.20 5.10 0.00 1.01 17.06 21.78 1.08 2 .62 0.05 0.39 0.12 17.43 13 .00 3.29 2.1 0.82 91.09
Q3 2021 2.87 0.16 8.79 0.00 0.40 6.52 11.88 0.55 2.57 0.10 0.21 0.08 10.05 10 .76 0 .71 0.7 0.43 56.81
Q4 2021 3.89 0.13 11.41 0.00 0.70 13 .01 35 .12 0.73 1.85 0.32 0.36 0.09 14 .72 12.18 0.83 1.2 0.70 97.29
QI 2022 3.86 0.07 1.59 0.00 0.57 7.44 22 .22 1.40 2.07 0.27 0.3 I 0.09 1.67 10.67 0 .86 I.I 0.63 54 .84
Q2 2022 3.04 0.05 1.44 0.00 0.57 8.44 14.70 0.75 1.87 0.01 0.30 0.07 6.81 9.81 2.35 0.8 0.55 51.61
Q3 2022 2.90 0.16 5.46 0.00 0.44 12 ,80 15.61 1.24 1.75 0.03 0.28 0.08 10.40 8.80 0.97 0.8 0.55 62.30
Q4 2022 3.12 0.08 4, 11 0.00 0.48 11.59 23.10 1.17 1.82 0.26 0.38 0.08 1.67 11.15 2.56 0.9 0.59 63.06
QI 2023 3.34 0.16 1.93 0.00 0.49 8.92 22.78 1.43 1.62 0.11 0.17 0.06 7.64 7.10 0.41 0.5 0.42 57.06
Q2 2023 3.20 0.06 6.53 0.00 0.42 9.30 15.60 0.81 2.63 0.25 0.37 0.06 12.05 12.77 1.91 0.8 0.54 67.30
Q3 2023 3.12 0,07 1.36 0.00 0.44 11.49 12.51 0.78 2.07 0.27 0.31 0.06 4.57 9.75 1.43 0.7 0.50 49.42
Q4 2023 4 97 0.21 1.00 0.00 0.22 7.36 12.18 0.40 1.65 0.24 0.25 0.06 6.50 9.43 0.77 0.7 0.53 46.43
QI 2024 3.42 0.06 0.87 0.00 0.37 9.79 25.60 0.51 1.81 0.26 0.32 0.08 2.54 12 52 I 02 0.7 0.59 60.45
Well Totals 191.6 16.5 410.1 63.4 125.7 518.0 1270.7 76.9 498.3 13.8 19.7 5.9 387.6 611.2 46.2 29.6 24.6 4309.7
(pounds)
Table 3 Well Pumping Rates and Volumes
Pumping Well Volume of Water Pumped
Name During the Quarter (gals) Average Pump Rate (gpm)
MW-4 90964.1 4.0
MW-26 22861.5 15.6
TW4-19 106975.9 15.6
TW4-4 6295.6 15.9
TWN-2 14586.8 16.0
TW4-22 21759.4 16.0
TW4-24 75577.5 15.8
TW4-25 105631.3 14.6
TW4-01 7636.8 12.7
TW4-02 10605.4 16.0
TW4-11 1278.9 15.9
TW4-21 80835.1 16.0
TW4-37 44275.4 18.0
TW4-39 32186.4 18.0
TW4-40 39466.3 18.0
TW4-41 11795.1 6.0
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
MW-4 MW-26
Total Total Pumped Total Total Total Pumped Cone Cone Total
Quarter Pumped Cone (mg/L) Cone (ug/L) Total (ug) Pumped Total (ug) Total Total
(gal) (liters) (grams) (pounds) (gal) (mg/L) (ug/L) (liters) (grams) (pounds)
Q3 2010 79859.1 4.80 4800 302266.7 1450880129 1450.9 3.20 63850.0 0.60 600 241672.3 145003350 145 0.32
Q4 2010 90042.2 5.00 5000 340809.7 1704048635 1704.0 3.76 60180.0 0.70 700 227781.3 159446910 159 0.35
Ql 2011 76247.6 4.60 4600 288597.2 1327546964 1327.5 2.93 55130.0 0.50 500 208667.1 104333525 104 0.23
Q2 2011 85849.3 4.90 4900 324939.6 1592204042 1592.2 3.51 55800.6 0.30 300 211205.3 6.34E+07 63 0.14
Q3 2011 85327.7 4.90 4900 322965.3 1582530188 1582.5 3.49 65618.0 0.90 900 248364.1 223527717 224 0.49
Q42011 89735.0 5.10 5100 339647.0 1732199573 1732.2 3.82 50191.3 2.00 2000 189974.1 379948141 380 0.84
Ql 2012 90376.4 4.80 4800 342074.7 1641958435 1642.0 3.62 31440.1 1.70 1700 119000.8 202301323.5 202 0.45
Q2 2012 90916.5 4.90 4900 344118.8 1686181940 1686.2 3.72 26701.2 2.50 2500 101064.1 252660294.3 253 0.56
Q3 2012 91607.0 5.00 5000 346732.5 1733662475 1733.7 3.82 25246.0 2.60 2600 95556.1 248445886 248 0.55
Q4 2012 78840.0 4.80 4800 298409 .4 1432365120 1432.4 3.16 30797.0 1.46 1460 116566.6 170187301. 7 170 0.38
Q12013 62943.7 4.78 4780 238241.9 1138796304 1138.8 2.51 22650.7 2.27 2270 85732.9 194613681.9 195 0.43
Q2 2013 71187.3 4.22 4220 269443.9 1137053387 1137.1 2.51 25343.4 2.11 2110 95924.8 202401262.6 202 0.45
Q3 2013 72898.8 4.89 4890 275922 .0 1349258375 1349.3 2.97 25763.0 1.98 1980 97513.0 193075650.9 193 0.43
Q4 2013 70340.4 5.25 5250 266238.4 1397751674 1397.8 3.08 24207.6 1.38 1380 91625.8 126443557.1 126 0.28
Ql 2014 69833.8 4.70 4700 264320.9 1242308385 1242.3 2.74 23263.1 2.12 2120 88050.8 186667767 187 0.41
Q2 2014 71934.9 4.08 4080 272273.6 1110876274 1110.9 2.45 23757.5 1.42 1420 89922.1 127689435.3 128 0.28
Q3 2014 74788.2 3.70 3700 283073.3 1047371347 1047.4 2.31 24062.4 0.70 700 91076.2 63753328.8 64 0.14
Q42014 63093.0 5.07 5070 238807.0 1210751515 1210.8 2.67 21875.8 0.93 934 82799.9 77335109.4 77 0.17
Ql 2015 76454.3 5.75 5750 289379.5 1663932272 1663.9 3.67 24004.9 2.68 2680 90858.5 243500904.6 244 0.54
Q2 2015 60714.7 2.53 2530 229805.1 581407002.9 581.4 1.28 27804.6 0.85 845 105240.4 88928147.3 89 0.20
Q3 2015 89520.8 4.79 4790 338836.2 1623025532 1623.0 3.58 21042.0 1.75 1750 79644.0 139376947.5 139 0.31
Q4 2015 99633.4 4.43 4430 377112.4 1670608016 1670.6 3.68 19355.6 1.11 1110 73260.9 81319650.1 81 0.18
Ql 2016 90882.1 5.15 5150 343988.7 1771542055 1771.5 3.91 19150.8 1.45 1450 72485.8 105104378.1 105 0.23
Q2 2016 96540.5 4.54 4540 365405.8 1658942298 1658.9 3.66 22105.7 1.12 1120 83670.1 93710483.4 94 0.21
Q3 2016 79786.4 4.95 4950 301991.5 1494858044 1494.9 3.30 17149.5 1.57 1570 64910.9 101910046.3 102 0.22
Q4 2016 85414.0 4.88 4880 323292.0 1577664911 1577.7 3.48 18541.6 1.18 1180 70180.0 82812348.1 83 0.18
Ql 2017 76642.3 4.99 4990 290091.1 1447554616 1447.6 3.19 26107.0 0.768 768 98815.0 75889916.2 76 0.17
Q2 2017 72299.8 4.88 4880 273654.7 1335435146 1335.4 2.94 25921.8 0.922 922 98114.0 90461120.0 90 0 .20
Q3 2017 95349.3 4.59 4590 360897.1 1656517691 1656.5 3.65 27489.9 1.56 1560 104049.3 162316863.5 162 0.36
Q4 2017 106679.8 5.25 5250 403783.0 2119860976 2119.9 4.67 26445.8 1.04 1040 100097.4 104101247.1 104 0.23
Ql 2018 105060.4 4.47 4470 397653.6 1777511655 1777.5 3.92 27004.7 1.57 1570 102212.8 160474079.5 160 0.35
Q2 2018 101786.2 4.64 4640 385260.8 1787609959 1787.6 3.94 26654.7 0.90 901 100888.0 90900123.6 91 0.20
Q3 2018 95480.5 4.55 4550 361393.8 1644341817.5 1644.3 3.63 25536.1 2.80 2800 96654.1 270631587.8 271 0.60
Q4 2018 102844.8 4.44 4440 389267.5 1728347833.9 1728.3 3.81 23791.3 1.96 1960 90050.1 176498138.2 176 0.39
Ql 2019 111746.9 5.05 5050 422961.9 2135957801.0 2136.0 4.71 26798.5 1.85 1850 101432.3 187649796.6 188 0.41
Q2 2019 94540.7 5.16 5160 357836.5 1846436595.4 1846.4 4.07 24050.2 2.83 2830 91030.0 257614919.8 258 0.57
Q3 2019 95517.8 4.69 4690 361534.9 1695598554.4 1695.6 3.74 24181.1 3.08 3080 91525.5 281898427 .6 282 0.62
Q4 2019 99220.8 4.34 4340 375550.9 1629890816.6 1629.9 3.59 22384.8 0.977 977 84726.5 82777759.2 83 0.18
Ql 2020 102597.0 6.22 6220 388329.6 2415410391.9 2415.4 5.33 24107.0 1.17 1170 91245.0 106756644.2 107 0.24
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
MW-4 MW-26
Total Total Pumped Total Total Total Pumped Cone Cone Total Total Total Quarter Pumped Cone(mg/L) Cone (ug/L) Total (ug) Pumped Total (ug)
(gal) (liters) (grams) (pounds) (gal) (mg/L) (ug/L) (liters) (grams) (pounds)
Q2 2020 101850.7 5.04 5040 385504.9 1942944502.7 1942.9 4.28 25418.4 2.93 2930 96208.6 281891326.9 282 0.62
Q3 2020 84607 .8 4.93 4930 320240.6 1578786151.6 1578.8 3.48 23663 .7 0 .416 416 89567.1 37259915.5 37 0.08
Q42020 91258 .6 4.62 4620 345413.8 1595811760.6 1595 .8 3.52 28934.5 3 .620 3620 109517 .1 396451838.7 396 0 .87
Ql 2021 93486 .7 4.61 4610 353847.3 1631235928.8 1631.2 3 .60 27898 .0 0.349 349 105593.9 36852281.6 37 0.08
Q2 2021 93252.4 6.48 6480 352960.3 2287182964.3 2287 .2 5.04 29124.1 0 .810 810 110234.7 89290122 .0 89 0 .20
Q3 2021 89693.5 3 ,83 3830 339489.8 1300246017.5 1300.2 2.87 27945 .6 0.671 671 105774.1 70974418.4 71 0 .16
Q4 2021 95091.4 4.90 4900 359920.8 1763611908.2 1763.6 3.89 30045.3 0.518 518 113721.5 58907716.5 59 0 .13
Ql 2022 96291.3 4.80 4800 364462.6 17 49420338.4 1749.4 3.86 29113.3 0.300 300 110193 .8 33058152.2 33 0.07
Q2 2022 93554.5 3.90 3900 354103 .9 1381005047.0 1381.0 3.04 29385.9 0 .220 220 111225.6 24469638.9 24 0 .05
Q3 2022 82718.6 4.20 4200 313089.9 1314977584.2 1315.0 2.90 28531.3 0.662 662 107991.0 71490022.5 71 0.16
Q4 2022 91487.4 4.09 4090 346279.8 1416284573.6 1416.3 3.12 29411.4 0.337 337 111322.1 37515564.2 38 0 .08
Ql 2023 90044.0 4.44 4440 340816.6 1513225773.7 1513.2 3.34 27474.7 0.694 694 103991.7 72170267.2 72 0 .16
Q2 2023 91310.8 4.20 4200 345611.5 1451568105.5 1451.6 3.20 25207.6 0.294 294 95410.8 28050765.2 28 0 .06
Q3 2023 95944 .3 3.90 3900 363149 .2 1416281784.5 1416.3 3.12 26841 .5 0.324 324 101595.1 32916805.1 33 0.07
Q4 2023 85275.0 6.99 6990 322766.0 2256134524.5 2256 .1 4.97 21628 .4 1.17 1170 81863 .5 95780288.0 96 0.21
Ql 2024 90964.1 4.51 4510 344299 ,3 1552789707 .2 1552 .8 3.42 22861 .5 0.331 331 86530.8 28641687.4 29 0.06
Totals Since
Q3 2010 4821364.62 191.7 1588990.52 16 .5
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-19 TW4-20
Total Pumped Cone Cone Total Total Total Total Pumped Cone Cone Total Pumped Total Quarter Pumped Total (ug) Total (ug) Total (grams) (gal) (mg/L) (ug/L) (liters) (grams) (pounds) (gal) (mg/L) (ug/L) (liters) (pounds)
Q3 2010 116899.2 5.90 5900 442463.5 2610534485 2611 5.76 39098.3 5.30 5300 147987.1 784331447.2 784 1.73
Q4 2010 767970.5 2.70 2700 2906768.3 7848274525 7848 17.30 36752.5 4.60 4600 139108.2 639897777.5 640 1.41
Ql 2011 454607.9 17.00 17000 1720690.9 29251745326 29252 64.49 37187.5 4.40 4400 140754.7 619320625 619 1.37
Q2 2011 159238.9 12.00 12000 602719.2 7232630838 7233 15.95 67907.7 4.80 4800 257030.6 1233747094 1234 2.72
Q3 2011 141542.6 3.00 3000 535738.7 1607216223 1607 3.54 72311.2 6.50 6500 273697.9 1779036298 1779 3.92
Q4 2011 147647.2 5.00 5000 558844.7 2794223260 2794 6.16 72089.3 4.20 4200 272858.0 1146003602 1146 2.53
Ql 2012 148747.0 0.60 600 563007.4 337804437 338 0.74 76306.0 7.90 7900 288818.2 2281663859 2282 5.03
Q2 2012 172082.0 2.40 2400 651330.5 1563193161 1563 3.45 22956.4 11.00 11000 86890.1 955790963.1 956 2.11
Q3 2012 171345.0 2.50 2500 648540.8 1621352063 1621 3.57 22025.0 10.80 10800 83364.6 900337950 900 1.98
Q4 2012 156653.0 4.10 4100 592931.6 2431019581 2431 5.36 20114.0 11.00 11000 76131.5 837446390 837 1.85
Ql 2013 210908.0 7.99 7990 798286.8 6378311372 6378 14.06 18177.0 9.07 9070 68799.9 624015501.2 624 1.38
Q2 2013 226224.0 2.95 2950 856257.8 2525960628 2526 5.57 20252.4 9.76 9760 76655.3 748156059.8 748 1.65
Q3 2013 329460.1 17.60 17600 1247006.5 21947314022 21947 48.39 19731.0 8.65 8650 74681.8 645997872.8 646 1.42
Q42013 403974.0 4.70 4700 1529041.6 7186495473 7186 15.84 19280.2 9.64 9640 72975.6 703484369.5 703 1.55
Ql 2014 304851.0 1.62 1620 1153861.0 1869254877 1869 4.12 18781.6 7.56 7560 71088.4 537427971.4 537 1.18
Q2 2014 297660.0 1.34 1340 1126643.1 1509701754 1510 3.33 18462.4 5.95 5950 69880.2 415787094.8 416 0.92
Q3 2014 309742.0 1.60 1600 1172373.5 1875797552 1876 4.14 17237.9 4.30 4300 65245.5 280555441.5 281 0.62
Q4 2014 198331.0 4.72 4720 750682.8 3543222981 3543 7.81 16341.8 7.67 7670 61853.7 474417978.7 474 1.05
Ql 2015 60553.0 8.56 8560 229193.1 1961892979 1962 4.33 15744.7 9.80 9800 59593.7 584018157.1 584 1.29
Q2 2015 75102.8 0.92 916 284264.1 260385913.8 260 0.57 18754.1 5.76 5760 70984.3 408869386.6 409 0.90
Q3 2015 116503.9 11.60 11600 440967.3 5115220233 5115 11.28 17657.3 9.27 9270 66832.9 619540802.2 620 1.37
Q4 2015 112767.7 10.60 10600 426825.7 4524352892 4524 9.97 15547.4 6.23 6230 58846.9 366616243.1 367 0.81
Ql 2016 116597.0 15.70 15700 441319.6 6928718427 6929 15.28 14353.5 10.30 10300 54328.0 559578374.3 560 1.23
Q2 2016 123768.0 1.27 1270 468461.9 594946587.6 595 1.31 15818.3 11.20 11200 59872.3 670569373.6 671 1.48
Q3 2016 103609.0 10.50 10500 392160.1 4117680683 4118 9.08 12186.6 11.30 11300 46126.3 521226975.3 521 1.15
Q4 2016 104919.4 10.00 10000 397119.9 3971199290 3971 8.76 12879.6 11.40 11400 48749.3 555741860.4 556 1.23
Ql 2017 110416.7 11 .10 11100 417927.2 4638992025 4639 10.23 13552.8 12.00 12000 51297.3 615568176 616 1.36
Q2 2017 109943.0 0.24 243 416134.3 101120624 101 0.22 12475.3 9.76 9760 47219.0 460857542.5 461 1.02
Q3 2017 112626.4 1.12 1120 426290.9 477445834.9 477 1.05 14556.8 10.80 10800 55097.5 595052870.4 595 1.31
Q4 2017 108891.2 0.38 377 412153.2 155381753.4 155 0.34 14271.0 8.91 8910 54015.7 481280198.9 481 1.06
Ql 2018 109856.3 8.61 8610 415806.1 3580090482 3580 7.89 14258.4 9.50 9500 53968.0 512696418 513 1.13
Q2 2018 111271.4 0.49 494 421162.2 208054151.0 208 0.46 13367.6 10.40 10400 50596.4 526202206.4 526 1.16
Q3 2018 105821.8 2.55 2550 400535.5 1021365558.2 1021 2.25 12443.6 8.14 8140 47099.0 383385763.5 383 0.85
Q4 2018 107197.4 0.23 233 405742.2 94537923.0 95 0.21 12841.1 9.72 9720 48603.6 472426637.2 472 1.04
Ql 2019 116132.8 6.58 6580 439562.6 2892322223.8 2892 6.38 14623.9 6.70 6700 55351.3 370853777.7 371 0.82
Q2 2019 100704.0 8.96 8960 381164.6 3415235174.4 3415 7.53 13439.2 9.59 9590 50867.4 487818097.5 488 1.08
Q3 2019 101026.8 0.33 332 382386.4 126952297.4 127 0.28 13787.0 10.20 10200 52183.8 532274709.0 532 1.17
Q4 2019 98806.8 0.54 535 373983.7 200081299.8 200 0.44 8317.7 9.75 9750 31482.5 306953952.3 307 0.68
Ql 2020 96857.9 10.10 10100 366607.2 3702732230.2 3703 8.16 9505.1 9.81 9810 35976.6 352930585.8 353 0.78
Quarter
Q2 2020
Q3 2020
Q4 2020
Ql 2021
Q2 2021
Q3 2021
Q4 2021
Ql 2022
Q2 2022
Q3 2022
Q4 2022
Ql 2023
Q2 2023
Q3 2023
Q4 2023
Ql 2024
Totals Since
Q3 2010
Total Pumped
(gal)
136619.7
154514.4
144512.0
133462.3
151242.8
157632.4
124359.9
112209.2
123246.5
137486.6
137474.5
132291.8
117218.0
104098.2
104814.1
106975.9
8999415.02
Cone
(mg/L)
1.14
11.60
1.10
6.61
4.04
6.68
11.00
1.70
1.40
4.76
3.58
1.75
6.68
1.57
1.14
0.980
TW4-19
Cone Total
Pumped (ug/L) (liters)
1140 517105.6
11600 584837.0
1100 546977.9
6610 505154.8
4040 572454.0
6680 596638.6
11000 470702.2
1700 424711.8
1400 466488.1
4760 520386.7
3580 520340.8
1750 500724.3
6680 443670.3
1570 394011.7
1140 396721.4
980 404903.9
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-20
Total Total Total Pumped Cone Cone Total Pumped Total Total (ug) Total (ug) Total (grams) (grams) (pounds) (gal) (mg/L) (ug/L) (liters) (pounds)
589500343.5 590 1.30 100713.8 7.23 7230 381201.6 2756087708.6 2756 6.08
6784109246.4 6784 14.96 12476.2 Well collapsed and not sampled
601675712.0 602 1.33 Well collapsed and not sampled
3339073264.4 3339 7.36 Well collapsed and not sampled
2312714151.9 2313 5.10 Well collapsed and not sampled
3985546075.1 3986 8.79 Well collapsed and not sampled
5177724436.5 5178 11.41 Well collapsed and not sampled
722010097.4 722 1.59 Well collapsed and not sampled
653083362.5 653 1.44 Well collapsed and not sampled
2477040717.2 2477 5.46 Well collapsed and not sampled
1862820039.8 1863 4.11 Well collapsed and not sampled
876267545.3 876 1.93 Well collapsed and not sampled
2963717479.8 2964 6.53 Well collapsed and not sampled
618598348.6 619 1.36 Well collapsed and not sampled
452262403.2 452 1.00 Well collapsed and not sampled
396805780.1 397 0.87 Well collapsed and not sampled
410.1 1018583.08 63.4
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-4 TW4-22
Total Pumped Cone Cone Total Pumped Total Total Total Cone Cone Total Pumped Total Total Quarter Total (ug) Pumped Total (ug) (gal) (mg/L) (ug/L) (liters) (grams) (pounds) (gal) (mg/L) (ug/L) (liters) (grams) (pounds)
Q3 2010 76916.8 7.30 7300 291130.1 2125249642.4 2125.25 4.69 NA NA NA NA NA NA NA
Q42010 86872.1 7.10 7100 328810.9 2334557379.4 2334.56 5.15 NA NA NA NA NA NA NA
Ql 2011 73360.0 7.00 7000 277667.6 1943673200.0 1943.67 4.29 NA NA NA NA NA NA NA
Q2 2011 80334.6 7.00 7000 304066.5 2128465227.0 2128.47 4.69 NA NA NA NA NA NA NA
Q3 2011 97535.0 6.60 6600 369170.0 2436521835.0 2436.52 5.37 NA NA NA NA NA NA NA
Q4 2011 109043.5 7.00 7000 412729.6 2889107532.5 2889.11 6.37 NA NA NA NA NA NA NA
Ql 2012 101616.8 7.10 7100 384619.6 2730799074.8 2730.80 6.02 NA NA NA NA NA NA NA
Q2 2012 87759.1 7.10 7100 332168.2 2358394173.9 2358.39 5.20 NA NA NA NA NA NA NA
Q3 2012 80006.0 7.10 7100 302822.7 2150041241.0 2150.04 4 .74 NA NA NA NA NA NA NA
Q4 2012 71596.0 7.00 7000 270990.9 1896936020.0 1896.94 4.18 NA NA NA NA NA NA NA
Ql 2013 58716.8 7.36 7360 222243.1 1635709127.7 1635.71 3.61 16677.4 58.0 58000.0 63124.0 3661189622.0 3661.2 8.07
Q2 2013 65603.4 6.30 6300 248308.9 1564345874.7 1564.35 3.45 25523.2 50.2 50200.0 96605.3 4849586662.4 4849.6 10.69
Q3 2013 63515.4 7.22 7220 240405.8 1735729796.6 1735.73 3.83 25592.9 29.7 29700.0 96869.1 2877013057.1 2877.0 6.34
Q4 2013 60233.6 7.84 7840 227984.2 1787395939.8 1787.40 3.94 24952.2 45.2 45200.0 94444.1 4268872280.4 4268.9 9.41
Ql 2014 58992.9 7.28 7280 223288.1 1625537560.9 1625.54 3.58 24532.0 54.6 54600.0 92853.6 5069807652.0 5069.8 11.18
Q2 2014 60235.3 5.91 5910 227990.6 1347424508.1 1347.42 2.97 24193.9 47.2 47200.0 91573.9 4322288622.8 4322.3 9.53
Q3 2014 69229.4 5.30 5300 262033.3 1388776378. 7 1388.78 3.06 24610.9 41.5 41500.0 93152.3 3865818644.8 3865.8 8.52
Q4 2014 64422 .6 7.02 7020 243839.5 1711753577.8 1711.75 3.77 23956.9 54.9 54900.0 90676.9 4978159970.9 4978.2 10.97
Q12015 36941.3 7.70 7700 139822.8 1076635717.9 1076.64 2.37 22046.9 69.2 69200.0 83447.5 5774568141.8 5774.6 12.73
Q2 2015 68162.8 6.33 6330 257996,2 1633115933.3 1633.12 3.60 23191.6 47.1 47100.0 87780.2 4134447702.6 4134.4 9.11
Q3 2015 64333.0 6.45 6450 243500.4 1570577612.3 1570.58 3.46 24619.9 64.7 64700.0 93186.3 6029155001.1 6029.2 13.29
Q4 2015 59235.1 6.27 6270 224204.9 1405764431.4 1405.76 3.10 23657.6 56.1 56100.0 89544.0 5023419297.6 5023.4 11.07
Ql 2016 57274.0 6.71 6710 216782.1 1454607823.9 1454.61 3.21 24517.8 31.1 31100.0 92799.9 2886076050.3 2886.1 6.36
Q2 2016 61378.0 6.56 6560 232315.7 1523991188.8 1523.99 3.36 26506.3 58.4 58400.0 100326.3 5859058577.2 5859.1 12.92
Q3 2016 50104.2 7.22 7220 189644.4 1369232546.3 1369.23 3.02 22144.1 61.3 61300.0 83815.4 5137885154.1 5137.9 11.33
Q4 2016 31656.0 6.77 6770 119818.0 811167589.2 811.17 1.79 23646.8 61.5 61500.0 89503.1 5504442987.0 5504.4 12.14
Ql 2017 23526.8 6.87 6870 89048.9 611766204.1 611.77 1.35 24066.2 69.8 69800.0 91090.6 6358121576.6 6358.1 14.02
Q2 2017 23244.9 7.06 7060 87981.9 621152542.3 621.15 1.37 23685.0 70.8 70800.0 89647.7 6347058930.0 6347.1 13.99
Q3 2017 23937.3 6.47 6470 90602.7 586199342.8 586.20 1.29 24583.2 66.1 66100.0 93047.4 6150433933.2 6150.4 13.56
Q4 2017 22900.6 6.90 6900 86678.8 598083519.9 598.08 1.32 23779.6 80.1 80100.0 90005.8 7209463458.6 7209.5 15.89
Ql 2018 23103.4 6.12 6120 87446.4 535171778.3 535.17 1.18 23982.8 62.3 62300.0 90774.9 5655276145.4 5655.3 12.47
Q2 2018 18137.0 6.34 6340 68648.5 435231775.3 435.23 0.96 23256.6 72.5 72500.0 88026.2 6381901747.5 6381.9 14.07
Q3 2018 15366.0 6.10 6100 58160.3 354777891.0 354.78 0.78 21248.7 55.4 55400.0 80426.3 4455618654.3 4455.6 9.82
Q4 2018 15420.2 6.02 6020 58365.5 351360051.1 351.36 0.77 24171.0 75.7 75700.0 91487.2 6925583689.5 6925.6 15.27
Ql 2019 16655.0 7.26 7260 63039.2 457664410.5 457.66 1.01 26149.9 71.9 71900.0 98977.4 7116473010.9 7116.5 15.69
Q2 2019 14311.9 10.4 10400 54170.5 563373631.6 563.37 1.24 23073.1 83.9 83900.0 87331.7 7327128245.7 7327.1 16.15
Q3 2019 14520.0 6.32 6320 54958.2 347335824.0 347.34 0.77 24711.7 72.5 72500.0 93533.8 6781199376.3 6781.2 14.95
Q4 2019 14399.8 6.52 6520 54503.2 355361144.4 355.36 0.78 24052.5 59.9 59900.0 91038.7 5453218878.8 5453.2 12.02
Ql 2020 14439.2 4.58 4580 54652.4 250307863.8 250.31 0.55 24746.1 57.7 57700.0 93664.0 5404412136.5 5404.4 11.91
Quarter
Q2 2020
Q3 2020
Q4 2020
Ql 2021
Q2 2021
Q3 2021
Q4 2021
Q12022
Q2 2022
Q3 2022
Q4 2022
Ql 2023
Q2 2023
Q3 2023
Q4 2023
Q12024
Totals Since
Q3 2010
Total Pumped
(gal)
15347.0
14389.9
15061.5
13740.8
13425.7
12021.0
11401.1
10434.1
11463.2
7928.5
8777.0
8236.0
7407.0
8580.2
5943.9
6295.6
2205488.30
TW4-4
Cone Cone Total Pumped
(mg/L) (ug/L) (liters)
7.26 7260 58088.4
7.04 7040 54465.8
6.77 6770 57007.8
6.75 6750 52008.9
9.02 9020 50816.3
4.00 4000 45499.5
7.32 7320 43153.2
6.60 6600 39493.1
6.00 6000 43388.2
6.65 6650 30009.4
6.59 6590 33220.9
7.12 7120 31173.3
6.82 6820 28035.5
6.08 6080 32476.1
4.44 4440 22497.7
7.08 7080 23828.8
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-22
Total Total Total Cone Cone Total Pumped Total Total Total (ug) Pumped Total (ug) (grams) (pounds) (gal) (mg/L) (ug/L) (liters) (grams) (pounds)
421721747.7 421.72 0.93 25295.3 60.5 60500.0 95742.7 5792433985.3 5792.4 12.77
383439031.4 383.44 0.85 23050.6 64.8 64800.0 87246.5 5653574560.8 5653.6 12.46
385942653. 7 385.94 0.85 22866.1 64.9 64900.0 86548.2 5616977433.7 5617.0 12.38
351060264.0 351.06 0.77 22605.6 69.6 69600.0 85562.2 5955128841.6 5955.1 13.13
458362796.0 458.36 1.01 22893.3 89.3 89300.0 86651.1 7737946846.7 7737.9 17.06
181997940.0 182.00 0.40 22272.5 35.1 35100.0 84301.4 2958979578.8 2959.0 6.52
315881156.8 315.88 0.70 22667.3 68.8 68800.0 85795.7 5902746258.4 5902.7 13.01
260654252.1 260.65 0.57 22083.6 40.4 40400.0 83586.4 3376891610.4 3376.9 7.44
260329272.0 260.33 0.57 22489.0 45.0 45000.0 85120.9 3830438925.0 3830.4 8.44
199562327 .1 199.56 0.44 21940.2 69.9 69900.0 83043.7 5804751624.3 5804.8 12.80
218926027.6 218 .93 0.48 22398.4 62.0 62000.0 84777.9 5256232528.0 5256.2 11.59
221953611.2 221.95 0.49 21783.0 49.1 49100.0 82448.7 4048228960.5 4048.2 8.92
191202075.9 191.20 0.42 22375.4 49.8 49800.0 84690.9 4217606272.2 4217.6 9.30
197454426.6 197.45 0.44 23422.7 58.8 58800.0 88654.9 5212909266.6 5212.9 11.49
99889617.1 99.89 0.22 20555.5 42.9 42900.0 77802.6 3337730145.8 3337.7 7.36
168708229.7 168.71 0.37 21759.4 53.9 53900.0 82359.3 4439167833.1 4439.2 9.79
125.7 1052334.7 518.0
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-24 TW4-25
Total Pumped Cone Cone Total Pumped Total Total Total Pumped Cone Cone Total Total Total Quarter (gal) (mg/L) (ug/L) (liters) Total (ug) (grams) (pounds) (gal) (mg/L) (ug/L) Pumped Total (ug) (grams) (pounds) (liters)
Q3 2010 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q42010 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q42011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2013 144842.6 35.9 35900 548229.2 19681429751.9 19681.4 43.39 99369.9 9.00 9000 376115.1 3385035643.5 3385.0 7.46
Q22013 187509.3 23.7 23700 709722.7 16820428001.9 16820.4 37.08 147310.4 5.24 5240 557569.9 2921666087.4 2921.7 6.44
Q3 2013 267703.5 32.6 32600 1013257.7 33032202568.5 33032,2 72.82 145840.9 5.69 5690 552007.8 3140924419.0 3140.9 6.92
Q42013 260555.3 34.6 34600 986201.8 34122582643.3 34122.6 75.23 126576.5 6.10 6100 479092.1 2922461520.3 2922.5 6.44
Ql 2014 229063.9 31.6 31600 867006.9 27397416823.4 27397.4 60.40 129979.2 2.16 2160 491971.3 1062657947.5 1062.7 2.34
Q2 2014 216984.1 35.0 35000 821284.8 287 44968647 .5 28745.0 63.37 124829.8 1.21 1210 472480.8 571701759.5 571.7 1.26
Q3 2014 213652.5 31.5 31500 808674.7 25473253443.8 25473.3 56.16 119663.9 1.60 1600 452927.9 724684578.4 724.7 1.60
Q42014 178468.7 35.7 35700 675504.0 24115493853.2 24115.5 53.17 107416.1 1.03 1030 406569.9 418767036.7 418.8 0.92
Ql 2015 92449.3 34.6 34600 349920.6 12107252777.3 12107.3 26.69 71452.4 14.40 14400 270447.3 3894441609.6 3894.4 8.59
Q2 2015 62664.2 31.8 31800 237184.0 7542451104.6 7542.5 16.63 91985.3 1.14 1140 348164.4 396907371.0 396.9 0.88
Q3 2015 66313.2 25.3 25300 250995.5 6350185188.6 6350.2 14.00 124137.1 1.63 1630 469858.9 765870045.3 765.9 1.69
Q4 2015 107799.1 29.6 29600 408019.6 12077379967 .6 12077.4 26.63 116420.1 1.78 1780 440650.1 784357139.7 784.4 1.73
Ql 2016 100063.2 29.1 29100 378739.2 11021311069.2 11021.3 24.30 115483.2 0.84 837 437103.9 365855974.3 365.9 0.81
Q2 2016 65233.6 24.2 24200 246909.2 5975202059.2 5975.2 13.17 125606.0 0.96 959 475418.7 455926542.9 455.9 1.01
Q3 2016 51765.8 34.4 34400 195933.6 6740114223.2 6740.1 14.86 104983.6 1.78 1780 397362.9 707306008.3 707.3 1.56
Q42016 99522.5 31.9 31900 376692.7 12016495933.8 12016.5 26.49 98681.2 1.24 1240 373508.3 463150344.1 463.2 1.02
Ql 2017 99117.4 41.3 41300 375159.4 15494081526.7 15494.1 34.16 161.2 17.00 17000 610.1 10372414.0 10.4 0.02
Q2 2017 52808.7 39.9 39900 199880.9 7975249087.1 7975.2 17.58 101617.2 0.98 976 384621.1 375390195.6 375.4 0.83
Q3 2017 55574.6 40.0 40000 210349.9 8413994440.0 8414.0 18.55 124138.4 1.23 1230 469863.8 577932528.1 577.9 1.27
Q4 2017 106021.4 31.7 31700 401291.0 12720924668.3 12720.9 28.04 116731.9 1.29 1290 441830.2 569961011.5 570.0 1.26
Ql 2018 96900.2 44.9 44900 366767.3 16467849839.3 16467.8 36.31 116991.7 2.23 2230 442813.6 987474293.4 987.5 2.18
Q2 2018 53117.9 33.6 33600 201051.3 6755322050.4 6755.3 14.89 117758.3 1.14 1140 445715.2 508115288.7 508.1 1.12
Q3 2018 53142.6 33.8 33800 201144.8 6798693525.1 6798.7 14.99 111657.5 0.81 810 422623.6 342325146.4 342.3 0.75
Q42018 101606.4 38.4 38400 384580.2 14767880601.6 14767.9 32.56 114458.2 0.63 634 433224.3 274664198.0 274.7 0.61
Ql 2019 97701.0 39.3 39300 369798.4 14533077063.0 14533.1 32.04 90789.5 0.64 639 343638.1 219584725.6 219.6 0.48
Q2 2019 53197.3 33.2 33200 201351.9 6684881625.8 6684.9 14.74 88302.0 0.82 821 334223.1 274397140.5 274.4 0.60
Q3 2019 54445.7 36.4 36400 206077.0 7501201871.8 7501.2 16.54 87609.5 0.55 548 331602.0 181717872.7 181.7 0.40
Q4 2019 102211.0 33.8 33800 386868.7 13076162421.7 13076.2 28.83 85928.5 0.84 841 325239.5 273526407.8 273.5 0.60
Ql 2020 86344.4 37.1 37100 326813.5 12124780044.9 12124.8 26.73 85049.5 0.61 607 321912.2 195400732.1 195.4 0.43
Quarter
Q2 2020
Q3 2020
Q4 2020
Ql 2021
Q22021
Q3 2021
Q4 2021
Ql 2022
Q2 2022
Q3 2022
Q4 2022
Ql 2023
Q2 2023
Q3 2023
Q4 2023
Ql 2024
Totals Since
Q3Z010
Total Pumped
(gal)
57634.7
53316.1
103987 .2
81891.2
54377.9
53333 .1
96534.8
73545.0
50341.7
58456.5
100289.8
75424.5
52081.4
57213 .1
86337.4
75577.5
4487121.2
Cone Cone
(mg/L) (ug/L)
41.7 41700
39.1 39100
35.9 35900
41 .9 41900
48.0 48000
26.7 26700
43 .6 43600
36.2 36200
35.0 35000
32.0 32000
27.6 27600
36.2 36200
35.9 35900
26.2 26200
16.9 16900
40.6 40600
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-24
Total Pumped Total Total Total Pumped Cone Cone
(llters) Total (ug) (grams) I (pounds) (gal) (mg/L) (ug/L)
218147.3 9096744057.2 9096.7 20.05 90767.9 0 .85 851
201801.4 7890436245.4 7890.4 17.40 83956.3 0 .99 994
393591.6 14129936716.8 14129.9 31.15 86254.4 1.64 1640
309958.3 12987251416.6 12987.3 28.63 80272.2 3.43 3430
205820.4 9879376872.0 9879.4 21 .78 82692.8 1.57 1570
201865 .8 5389817430.0 5389 .8 11.88 82802.3 0 .79 793
365384.1 15930745303.8 15930.7 35.12 89361.5 0.98 978
278367.8 10076915265.0 10076.9 22.22 92972.1 1.80 1800
190543 .2 6669011408.5 6669.0 14.70 101724.9 0.88 880
221257.7 7080245224.0 7080.2 15.61 98357.6 1.51 1510
379596.9 10476875291.5 10476.9 23.10 95056.0 1.47 1470
285481.6 10334433235.8 10334.4 22.78 87269.8 1.96 1960
197128.0 7076894677. 7 7076.9 15.60 94118.3 1.03 1030
216551.6 5673651487.7 5673.7 12.51 117564.3 0 .79 790
326787 .1 5522701297.1 5522.7 12.18 100409.1 0.480 480
286061.0 11614074612 .6 11614.1 25 .60 105631.3 0.581 581
1270.7 4580139 .82
TW4-25
Total Total Total Pumped Total (ug) (grams) (pounds) (liters)
343556.6 292366679.4 292.4 0.64
317774.6 315867910.3 315.9 0.70
326472.7 535415252.2 535.4 1.18
303830.4 1042138109.8 1042.1 2.30
312992.2 491397829.4 491.4 1.08
313406.8 248531607.5 248.5 0.55
338233.3 330792182.4 330.8 0.73
351899.4 633418917.3 633.4 1 .40
385028.7 338825230.3 338.8 0.75
372283.7 562148337.8 562.1 1.24
359787.1 528886998.1 528.9 1.17
330316.2 647419812.5 647.4 1.43
356237.8 366924976.4 366.9 0 .81
444980.9 351534891.6 351.5 0.78
380048 .3 182423180.2 182.4 0.40
399814.5 232292207.4 232.3 0 .51
76.9
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TWN-02 TW4-01
Total Cone Cone Total Pumped Total Total Total Cone Cone Total Pumped Total Total Quarter Total (ug) Pumped Total (ug) Pumped (gal) (mg/L) (ug/L) (liters) (grams) (pounds) (gal) (mg/L) (ug/L) (liters) (grams) (pounds)
Q3 2010 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2010 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q42012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2013 31009.4 57.3 57300 117370.6 6725334176.7 6725.3 14.83 NA NA NA NA NA NA NA
Q2 2013 49579.3 57.7 57700 187657.7 10827846433.9 10827.8 23.87 NA NA NA NA NA NA NA
Q3 2013 50036.5 80.0 80000 189388.2 15151052200.0 15151.1 33.40 NA NA NA NA NA NA NA
Q4 2013 49979.9 111.0 111000 189173.9 20998305286.5 20998.3 46.29 NA NA NA NA NA NA NA
Ql 2014 48320.4 42.6 42600 182892.7 7791229616.4 7791.2 17.18 NA NA NA NA NA NA NA
Q2 2014 47611.9 44.7 44700 180211.0 8055433555.1 8055.4 17.76 NA NA NA NA NA NA NA
Q3 2014 46927 .2 42.0 42000 177619.5 7460016984.0 7460.0 16.45 NA NA NA NA NA NA NA
Q4 2014 47585.6 70.6 70600 180111.5 12715871617.6 12715 .9 28 .03 NA NA NA NA NA NA NA
Ql 2015 47262.2 48.6 48600 178887.4 8693928952.2 8693.9 19.17 24569.2 7.06 7060 92994.4 656540619 .3 656.5 1.45
Q2 2015 48497.3 52.8 52800 183562.3 9692088410.4 9692.1 21.37 23989.9 6.07 6070 90801.8 551166753 .0 551.2 1.22
Q3 2015 48617.4 49.7 49700 184016.9 9145637892.3 9145.6 20.16 23652.0 6.28 6280 89522.8 562203309.6 562.2 1.2
Q4 2015 46754.1 44.9 44900 176964.3 7945695655. 7 7945.7 17.52 20764.3 1.55 1550 78592.9 121818957.0 121.8 0.27
Ql 2016 47670.2 86.3 86300 180431.7 15571256314.1 15571.3 34.33 19255.6 0 .15 148 72882.4 10786602.0 10.8 0.02
Q2 2016 50783.0 45.4 45400 192213.7 8726499937.0 8726.5 19.24 19588.2 0 .14 138 74141.3 10231504.5 10.2 0.02
Q3 2016 42329.6 35 .3 35300 160217.5 5655679020.8 5655.7 12.47 15613.5 5.49 5490 59097.1 324443065.3 324.4 0.72
Q4 2016 44640.6 32.6 32600 168964.7 5508248274.6 5508.2 12.14 16756.8 0.75 746 63424.5 47314668.0 47.3 0.10
Ql 2017 45283 .2 27.4 27400 171396.9 4696275388.8 4696.3 10.35 16931.8 4.44 4440 64086.9 284545671. 7 284.5 0.63
Q2 2017 42550.6 25.0 25000 161054.0 4026350525.0 4026.4 8.88 18200.2 5.74 5740 68887.8 395415725 .2 395.4 0.87
Q3 2017 46668.9 23.9 23900 176641.8 4221738697.4 4221.7 9 .31 17413.6 5.04 5040 65910.5 332188799 .0 332,2 0.73
Q4 2017 38964.7 31.9 31900 147481 .4 4704656325.1 4704.7 10.37 14089.8 5 .78 5780 53329.9 308246781 .5 308.2 0.68
Ql 2018 43341.0 19.6 19600 164045 .7 3215295426.0 3215.3 7 .09 12505.7 4 .8 4 4840 47334.1 229096920.6 229.1 0 .51
Q2 2018 43697.0 19.8 19800 165393 .1 3274784271.0 3274.8 7.22 10814.8 4.38 4380 40934.0 179290998.8 179.3 0.40
Q3 2018 41776.0 18.6 18600 158122.2 2941072176.0 2941.1 6.48 9727.3 4 .30 4300 36817.8 158316671.2 158.3 0.35
Q4 2018 38545.8 19.6 19600 145895.9 2859558718.8 2859.6 6.30 9836.7 4.57 4570 37231.9 170149826.4 170.1 0.38
Ql 2019 44752.8 19.0 19000 169389.3 3218397612.0 3218.4 7.10 10603.6 4.51 4510 40134.6 181007163 .3 181.0 0.40
Q2 2019 43432.2 45.1 45100 164390.9 7414028552.7 7414.0 16.35 9393.9 1.43 1430 35555.9 50844953 .4 50.8 0.11
Q3 2019 41377.5 23.2 23200 156613 .8 3633441030.0 3633.4 8.01 9734.1 1.65 1650 36843.6 60791888.0 60.8 0 .13
Q4 2019 34011.4 18.2 18200 128733 .1 2342943311.8 2342.9 5.17 9184.3 3 .91 3910 34762.6 135921670.2 135.9 0.30
Ql 2020 32230.0 16.5 16500 121990.6 2012844075.0 2012.8 4.44 9796.7 4 .67 4670 37080.5 173165979.4 173.2 0.38
Quarter
Q2 2020
Q3 2020
Q4 2020
Ql 2021
Q2 2021
Q3 2021
Q4 2021
Ql 2022
Q2 2022
Q3 2022
Q4 2022
Ql 2023
Q2 2023
Q3 2023
Q4 2023
Q12024
Totals Since
Q3 2010
Total
Pumped (gal)
30078.9
21279.1
25682 .1
23310.5
22717 .2
20130 .8
17425.3
16188.7
16024.1
15082.1
15606.0
17321.5
23193.7
17749.7
13534.0
14586.8
1594146.2
Cone Cone
(mg/L) (ug/L)
16.1 16100
17.2 17200
12.0 12000
15.4 15400
13.8 13800
15.3 15300
12.7 12700
15.3 15300
14.0 14000
13.9 13900
14.0 14000
11.2 11200
13.6 13600
14.0 14000
14.6 14600
14.9 14900
Table4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
lWN-02 1W4-01
Total Pumped Total Total Total Cone Cone Total Pumped Total (ug) Pumped (llters) (grams) (pounds) (gal) (mg/L) (ug/L) (liters)
113848.6 1832963047.7 1833.0 4.04 9600.2 0.44 443 36336.8
80541.4 1385311968.2 1385.3 3.05 9487.3 2.22 2220 35909.4
97206.7 1166480982.0 1166.5 2.57 9318.7 4 .30 4300 35271.3
88230.2 1358745734.5 1358.7 3.00 9066.4 2.72 2720 34316.3
85984.6 1186587507.6 1186.6 2.62 8764.1 0.73 728 33172.1
76195.0 1165783535.2 1165.8 2.57 8677.2 1.38 1380 32843.2
65954.8 837626419.7 837 .6 1.85 8873.4 4.37 4370 33585.8
61274.2 937495711.4 937.5 2.07 8251.8 3.90 3900 31233.1
60651.0 849114409.5 849.l 1.87 7616.0 0.18 180 28826.6
57085.6 793489799. 7 793.5 1.75 8512.1 0.42 420 32218.3
59068.7 826962469.9 827.0 1.82 8450.8 3.62 3620 31986.3
65562.0 734294299,8 734.3 1.62 7985.1 1.71 1710 30223.6
87788.3 1193920960.2 1193.9 2.63 7825.6 3.87 3870 29619.9
67182.6 940556603.0 940.6 2.07 8419.4 3.83 3830 31867.4
51226.1 747900716.2 747 .9 1.65 7329.3 3.91 3910 27741.4
55211.0 8 22 644466.2 822.6 1.81 7636.8 4 .07 4070 28905.3
498 .3 458236.20
Total Total Total (ug) (grams) (pounds)
16097183.4 16.1 0.04
79718935.7 79.7 0.18
151666501.9 151.7 0.33
93340401 .3 93.3 0.21
24149302 .3 24.1 0.05
45323618.8 45.3 0.10
146770029.0 146.8 0.32
121808945. 7 121.8 0.27
5188780.8 5.2 0.01
13531685.4 13.5 0.03
115790326.4 115.8 0.26
51682362.0 51.7 0.11
114628997.5 114.6 0.25
122052253.1 122.1 0.27
108468876.0 108.5 0.24
117644522.2 117.6 0.26
13.8
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-02 TW4-11
Total Pumped Cone Cone Total Pumped Total Total Total Cone Cone Total Total Total Quarter (gal) (mg/L) (ug/L) (liters) Total (ug) (grams) (pounds) Pumped (mg/L) (ug/L) Pumped Total (ug) (grams) (pounds) (gal) (liters)
Q3 2010 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2010 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q42011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2013 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2013 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2013 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2013 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2014 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2014 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2014 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2014 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2015 24156.7 5.32 5320 91433.1 486424142.5 486.4 1.07 9898.7 8.72 8720 37466.6 326708573.2 326.7 0.72
Q2 2015 22029.9 4.30 4300 83383.2 358547637.5 358.5 0.79 5243.3 8.48 8480 19845.9 168293151.4 168.3 0.37
Q3 2015 21586.9 3.8 3760 81706.4 307216126.0 307.2 0.7 3584.4 9.6 9610 13567.0 130378427.9 130.4 0.3
Q4 2015 21769.8 5.18 5180 82398.7 426825229. 7 426.8 0.94 4110.3 7.50 7500 15557.5 116681141.3 116.7 0.26
Ql 2016 20944.6 5.30 5300 79275.3 420159148.3 420.2 0.93 3676.2 7.13 7130 13914.4 99209793.2 99.2 0.22
Q2 2016 20624.0 6.67 6670 78061.8 520672472.8 520.7 1.15 3760.4 7.81 7810 14233.1 111160620.3 111.2 0.25
Q3 2016 17487.4 4.07 4070 66189.8 269392522.6 269.4 0.59 2953.8 8.83 8830 11180.1 98720574.4 98.7 0.22
Q4 2016 19740.6 6.07 6070 74718.2 453539298.0 453.5 1.00 3050.2 8.92 8920 11545.0 102981462.4 103.0 0.23
Ql 2017 19869.7 4.74 4740 75206.8 356480300. 7 356.5 0.79 2984.2 8.12 8120 11295.2 91716999.6 91.7 0.20
Q2 2017 18716.7 4.90 4900 70842.7 347129276.6 347.1 0.77 2845.9 7.92 7920 10771.7 85312113.5 85.3 0.19
Q3 2017 19338.8 5.08 5080 73197.4 371842578.6 371.8 0.82 2830.0 7.78 7780 10711.6 83335859.0 83.3 0.18
Q4 2017 17327.6 3.28 3280 65585.0 215118688.5 215.1 0.47 2612.7 7.79 7790 9889.1 77035851.4 77.0 0.17
Ql 2018 16232.3 2.94 2940 61439.3 180631411.2 180.6 0.40 2571.0 7.89 7890 9731.2 76779444.2 76.8 0.17
Q2 2018 16051.4 3.50 3500 60754.5 212640921.5 212.6 0.47 2513.5 7.51 7510 9513.6 71447117.2 71.4 0.16
Q3 2018 14927.2 4.83 4830 56499.5 272892353.2 272.9 0.60 2170.2 7.15 7150 8214.2 58731580.1 58.7 0.13
Q4 2018 15464.1 3.52 3520 58531.6 206031297.1 206.0 0.45 2379.5 6.85 6850 9006.4 61693891.4 61.7 0.14
Ql 2019 16169.9 3.92 3920 61203.1 239916040.3 239.9 0.53 2342.4 7.50 7500 8866.0 66494880.0 66.5 0.15
Q2 2019 13893.7 4 .38 4380 52587.7 230333926. 7 230.3 0 .51 2195.1 8.30 8300 8308.5 68960164.1 69.0 0.15
Q3 2019 14106.9 4.79 4790 53394.6 255760213.0 255.8 0.56 2046.0 7.15 7150 7744.1 55370386.5 55.4 0.12
Q4 2019 14220.9 3.40 3400 53826.1 183008762.1 183.0 0.40 1983.9 7.14 7140 7509.1 53614699.1 53.6 0.12
Ql 2020 13162.1 6.07 6070 49818.5 302398589.4 302.4 0.67 1947.4 7.07 7070 7370.9 52112326.6 52.1 0.11
Quarter
Q2 2020
Q3 2020
Q42020
Ql 2021
Q2 2021
Q3 2021
Q4 2021
Ql 2022
Q2 2022
Q3 2022
Q4 2022
Ql 2023
Q2 2023
Q3 2023
Q4 2023
Ql 2024
Totals Since
Q32010
Total Pumped
(gal)
14155.6
14009.5
14582.9
13189.6
11975.9
12694.5
12351.3
11380.6
11518.1
10953.7
12148.6
10275.4
11931.8
11513.8
10133.2
10605.4
571241.10
Cone Cone
(mg/L) (ug/L)
3.62 3620
3.35 3350
2.34 2340
3.30 3300
3.89 3890
1.97 1970
3.49 3490
3.30 3300
3.10 3100
3.07 3070
3.74 3740
2.03 2030
3.70 3700
3.23 3230
2.97 2970
3.62 3620
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-02 TW4-11
Total Pumped Total Total Total Cone Cone Total Total Total Total (ug) Pumped Pumped Total (ug) (liters) (grams) (pounds) (gal) (mg/L) (ug/L) (liters) (grams) (pounds)
53578.9 193955784.5 194.0 0.43 2003.9 7.56 7560 7584.8 57340796.9 57.3 0.13
53026.0 177636957.6 177.6 0.39 1784.1 7.59 7590 6752.8 51253892.4 51.3 0.11
55196.3 129159287.0 129.2 0.28 1394.6 7.19 7190 5278.6 37952853.6 38.0 0.08
49922.6 164744698.8 164.7 0.36 2195.1 7.21 7210 8308.5 59904495.5 59.9 0.13
45328.8 176328960.0 176.3 0.39 1694.5 8.17 8170 6413.7 52399786.0 52.4 0.12
48048.7 94655904.5 94.7 0.21 1560.8 5.78 5780 5907.5 34145214.7 34.1 0.08
46749.7 163156350.0 163.2 0.36 1485.5 7.44 7440 5622.6 41832274.2 41.8 0.09
43075.6 142149384.3 142.1 0.31 1497.2 7.40 7400 5666.9 41935074.8 41.9 0.09
43596.0 135147626.4 135.1 0.30 1473.1 5.90 5900 5575.5 32895416.1 32.9 0.07
41459.8 127281446.3 127.3 0.28 1304.3 6.90 6900 4936.9 34064273.3 34.1 0.08
45982.5 17197 4366. 7 172.0 0.38 1442.4 7.05 7050 5459.5 38489362.2 38.5 0.08
38892.4 78951549.7 79.0 0.17 1326.4 5.68 5680 5020.3 28515578.3 28.5 0.06
45161.9 167098893.1 167.1 0.37 1159.5 6.70 6700 4388.6 29403325.9 29.4 0.06
43579.7 140762537.6 140.8 0.31 1277.7 6.05 6050 4836.1 29258371.7 29.3 0.06
38354.2 113911861.1 113.9 0.25 1084.1 6.69 6690 4103.4 27451960.4 27.5 0.06
40141.4 145312009.2 145.3 0.32 1278.9 7.20 7200 4840.7 34853127.8 34.9 0.08
19.7 91661.14 5.9
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-Z1 TW4-37
Quarter Total Cone Cone Total Pumped Total (ug) Total Total Total Pumped Cone Cone Total Pumped Total (ug) Total Total
Pumped (gal) (mg/L) (ug/L) (liters) (grams) (pounds) (gal) (mg/L) (ug/L) (liters) (grams) (pounds)
Q3 2010 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2010 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q42011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2013 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2013 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2013 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2013 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2014 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2014 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2014 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2014 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2015 30743.7 13.1 13100 116364.9 1524380249.0 1524.4 3.4 29206.0 35.2 35200 110544.7 3891173792.0 3891.2 8.6
Q3 2015 125285.4 14.7 14700 474205.2 6970817013.3 6970.8 15.4 118063.9 32.4 32400 446871.9 14478648312.6 14478.6 31.9
Q4 2015 134774.9 14.30 14300 510123.0 7294758850.0 7294.8 16.08 111737.5 34.60 34600 422926.4 14633254737.5 14633.3 32.26
Ql 2016 125513.3 14.60 14600 475067.8 6935990471.3 6936.0 15.29 111591.0 28.40 28400 422371.9 11995362954.0 11995.4 26.45
Q2 2016 132248.7 13.10 13100 500561.3 6557353416.5 6557.4 14.46 119241.2 27.90 27900 451327.9 12592049581.8 12592.0 27.76
Q3 2016 110381.9 16.50 16500 417795.5 6893625609.8 6893.6 15.20 98377.6 33.40 33400 372359.2 12436797814.4 12436.8 27.42
Q4 2016 130311.3 13.50 13500 493228.3 6658581651.8 6658.6 14.68 101949.1 26 .10 26100 385877.3 10071398665.4 10071.4 22.20
Q12017 54333.5 17.70 17700 205652.3 3640045665.8 3640.0 8.02 97071.7 32.30 32300 367416.4 11867549219.4 11867.5 26.16
Q2 2017 60969.7 9.53 9530 230770.3 2199241097.2 2199.2 4.85 93191.3 31.20 31200 352729.1 11005146999.6 11005.1 24.26
Q3 2017 120116.2 18.2 18200 454639.8 8274444669.4 8274.4 18.24 81749.3 30.5 30500 309421.1 9437343565.3 9437.3 20.81
Q4 2017 126492.5 16.9 16900 478774.1 8091282501.3 8091.3 17.84 87529.6 30.6 30600 331299.5 10137765801.6 10137.8 22.35
Ql 2018 117832.0 15.8 15800 445994.1 7046707096.0 7046.7 15.54 84769.3 30.0 30000 320851.8 9625554015.0 9625.6 21.22
Q2 2018 116681.0 14.1 14100 441637.6 6227089948.5 6227 .1 13.73 83653 ,1 28.6 28600 316627.0 9055531728.1 9055.5 19.96
Q3 2018 110001.4 0.236 236 416355.3 98259850.6 98.3 0.22 77457.8 25.4 25400 293177.8 7446715434.2 7446.7 16.42
Q4 2018 121686.3 15.2 15200 460582.6 7000856211.6 7000.9 15.43 76271.4 27.3 27300 288687.2 7881161897.7 7881.2 17.38
Ql 2019 123264.1 8.99 8990 466554.5 4194325339.8 4194.3 9.25 77591.4 30.1 30100 293683.4 8839871814.9 8839.9 19.49
Q2 2019 106893.6 17.5 17500 404592.3 7080364830.0 7080.4 15.61 64950.1 31.2 31200 245836.1 7670087209.2 7670.1 16.91
Q3 2019 108132.9 14.7 14700 409283.0 6016460489.6 6016.5 13.26 67572.0 25.8 25800 255760.0 6598608516.0 6598.6 14.55
Q4 2019 116167.6 5.73 5730 439694.2 2519447632.8 2519.4 5.55 66732.4 25.5 25500 252582.1 6440844417. 0 6440.8 14.20
Ql 2020 106622.0 8.93 8930 403564.3 3603829269.1 3603.8 7.95 65554.2 28.3 28300 248122.6 7021870910.1 7021.9 15.48
Quarter
Q2 2020
Q3 2020
Q4 2020
Ql 2021
Q2 2021
Q3 2021
Q4 2021
Ql 2022
Q2 2022
Q3 2022
Q4 2022
Ql 2023
Q2 2023
Q3 2023
Q4 2023
Ql 2024
Totals Since
Q3 2010
Total
Pumped (gal)
110999,1
99515.1
107061.2
97211.5
97157.6
93390.4
102535.0
91105.4
91682.5
87160.0
94463.6
83943.5
83501.7
89276.6
82763.3
80835.1
3671053.5
Cone Cone
(mg/L) (ug/L)
15.4 15400
12.6 12600
16.3 16300
15.2 15200
21.5 21500
12.9 12900
17.2 17200
2.2 2200
8,9 8900
14.3 14300
2.12 2120
10.9 10900
17.3 17300
6.13 6130
9.41 9410
3.76 3760
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-21 TW4-37
Total Pumped Total (ug) Total Total Total Pumped Cone Cone Total Pumped Total (ug) Total Total
(liters) (grams) (pounds) (gal) (mg/L) (ug/L) (liters) (grams) (pounds)
420131.7 6470028288.6 6470.0 14.26 65163.8 28.3 28300 246645.0 6980053018.9 6980.1 15.39
376664.7 4745975111.0 4746.0 10.46 56659.3 29.5 29500 214455.5 6326435789.8 6326.4 13.95
405226.5 6605191796.8 6605.2 14.56 61323.9 28.7 28700 232111.0 6661584595.1 6661.6 14.69
367945.5 5592771442.7 5592.8 12.33 59907.4 26.9 26900 226749.5 6099561792.1 6099.6 13.45
367741.5 7906442594.0 7906.4 17.43 58564.2 26.6 26600 221665.5 5896302220.2 5896.3 13.00
353482.7 4559926365.6 4559.9 10.05 49987.5 25.8 25800 189202.7 4881429337.5 4881.4 10.76
388095.0 6675234221.0 6675.2 14.72 46649.1 31.3 31300 176566.8 5526542201.6 5526.5 12.18
344833.9 758634665.8 758.6 1.67 42923.5 29.8 29800 162465.4 4841470335.5 4841.5 10.67
347018.3 3088462536.3 3088.5 6.81 41998.3 28.0 28000 158963.6 4450979834.0 4451.0 9.81
329900.7 4717580203.8 4717.6 10.40 39640.3 26.6 26600 150038.5 3991025044.3 3991.0 8.80
357544.6 757994578.4 758.0 1.67 43251.9 30.9 30900 163708.4 5058590842.3 5058.6 11.15
317726.1 3463214595.2 3463.2 7.64 44536.9 19.1 19100 168572.2 3219728380.2 3219.7 7.10
316053.9 5467732412.0 5467.7 12.05 42641.9 35.9 35900 161399.6 5794245334.9 5794.2 12.77
337911.9 2071400137.0 2071.4 4.57 46548.5 25.1 25100 176186.1 4422270419.8 4422.3 9.75
313259.2 2947769110.1 2947.8 6.50 43126.4 26.2 26200 163233.4 4276715708.8 4276.7 9.43
305960.8 1150412524.5 1150.4 2.5 4 44275.4 33.9 33900 167582.4 5681042987 .1 5681.0 12.52
387.6 2501458.2 611.2
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
1W4-39 1W4-40
'
Total Pumped Cone Cone Total Total Total Total Pumped Total Total Quarter Pumped Total (ug) Cone (mg/L) Cone (ug/L) Pumped Total (ug) Total (grams) (gal) (mg/L) (ug/L) (liters) (grams) (pounds) (gal) (liters) (pounds)
'
Q3 2010 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2010 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2012 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2013 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2013 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2013 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q42013 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2014 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2014 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2014 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2014 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2016 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2016 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2016 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2016 3589.3 20.70 20700 13585.5 281219860.4 281.2 0.62 NA NA NA NA NA NA NA
Ql 2017 103117.8 6.44 6440 390300.9 2513537622.1 2513.5 5.54 NA NA NA NA NA NA NA
Q2 2017 41313.0 6.25 6250 156369.7 977310656.3 977 .3 2.15 NA NA NA NA NA NA NA
Q3 2017 34546.3 7.74 7740 130757.7 1012064950.2 1012.1 2.23 NA NA NA NA NA NA NA
Q4 2017 68180.2 2.65 2650 258062.1 683864451.1 683.9 1.51 NA NA NA NA NA NA NA
Ql 2018 59262.2 3.33 3330 224307.4 746943731.9 • 746.9 1.65 NA NA NA NA NA NA NA
Q2 2018 34259.8 4.84 4840 129673.3 627618980.1 627.6 1.38 NA NA NA NA NA NA NA
Q3 2018 33473.4 6.05 6050 126696.8 766515755.0 766.5 1.69 NA NA NA NA NA NA NA
Q4 2018 37003.6 6.39 6390 140058.6 89497 4620.1 895.0 1.97 NA NA NA NA NA NA NA
Ql 2019 49116.9 2.08 2080 185907.5 386687530.3 386.7 0.85 NA NA NA NA NA NA NA
Q2 2019 34285 .7 8.45 8450 129771.4 1096568114.5 1096.6 2.42 81762.8 3.55 3550.0 309472.2 1098626302.9 1098.6 2 .4
Q3 2019 36976.2 1.75 1750 139954.9 244921104.8 244.9 0.54 116414.2 3.39 3390.0 440627.7 1493728062.3 1493.7 3.3
Q4 2019 51808 .6 0.948 948 196095.6 185898582.3 185.9 0.41 108281.9 2.89 2890.0 409847.0 1184457696.0 1184.5 2.6
Ql 2020 43169.3 0.792 792 163395.8 129409474.0 129.4 0.29 102021.5 2.98 2980.0 386151.4 1150731217.7 1150.7 2.5
Quarter
Q2 2020
Q3 2020
Q42020
Ql 2021
Q22021
Q3 2021
Q4 2021
Ql 2022
Q2 2022
Q3 2022
Q4 2022
Ql 2023
Q2 2023
Q3 2023
Q4 2023
Ql 2024
Totals Since
Q32010
Total Pumped
(gal)
37352.7
35628.2
46794.2
38932.4
32865.2
31436.6
42730.6
35550.2
31354.2
31305.9
39072.6
35659.0
28777.7
34299.4
33586.9
32186.4
1197634.5
Cone
(mg/L)
5.01
2.69
7.03
2.12
12 .0
2.70
2.33
2.90
9.00
3.72
7.86
1.37
7.96
5.01
2.74
3.80
TW4-39
Cone Total
Pumped (ug/L) (liters)
5010 141380.0
2690 134852.7
7030 177116.0
2120 147359.1
12000 124394.8
2700 118987.5
2330 161735.3
2900 134557.5
9000 118675.6
3720 118492.8
7860 147889.8
1370 134969.3
7960 108923.6
5010 129823.2
2740 127126.4
3800 121825.3
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-40
Total Total Total Pumped Total Total Total (ug) Cone(mg/L) Cone (ug/L) Pumped Total (ug) Total (grams) (grams) (pounds) (gal) (liters) (pounds)
708313647 .2 708.3 1.56 100757.1 2.91 2910.0 381365.7 1109774294.8 1109.8 2.4
362753862.5 362.8 0.80 86264.5 2.88 2880.0 326511.1 940352061.6 940.4 2 .1
1245125810.4 1245.1 2.75 77535.9 2,58 2580.0 293473.5 757161617.2 757.2 1.7
312401364.1 312.4 0.69 72543.4 2.43 2430.0 274576.7 667221272. 7 667.2 1.5
1492737384.0 1492 .7 3.29 66866.4 3 .77 3770.0 253089 .3 954146751.5 954.1 2.1
321266333.7 321.3 0 .71 58841.0 1.50 1500.0 222713.1 334069664.0 334.1 0 .7
376843297.9 376.8 0 .83 57357.9 2.60 2600 .0 217099.6 564458897 .1 564.5 1.2
390216770.3 390.2 0 .86 53009.2 2.50 2500.0 200639.8 501599555.0 501.6 1.1
1068080823.0 1068.1 2.35 52135.2 1.90 1900.0 197331.8 374930506.5 374.9 0.8
440793333.2 440 .8 0.97 45416.2 2.22 2220.0 171900.4 381618871.8 381.6 0.8
1162413757.3 1162.4 2.56 48263.2 2.24 2240.0 182676.1 409194545.3 409.2 0.9
184907961.6 184.9 0.41 45062.1 1.28 1280.0 170560.2 218317007.4 218.3 0.5
867031812.2 867.0 1.91 45516.3 2.04 2040.0 172279.0 351449172.8 351.4 0.8
650414377.3 650.4 1.43 43550.1 1.88 1880.0 164837.1 309893801.6 309.9 0.7
348326381.2 348.3 0 .77 38061.9 2.09 2090.0 144064.2 301094131.9 301.1 0.7
462936272.0 462 .9 1.02 39466.3 2.02 2020.0 149379.8 301747107.6 301.7 0.7
46.2 1339127.0 29.6
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-41
Total Total
Quarter Total Pumped Cone Cone Pumped Total (ug) Total Total Removed
(gal) (mg/L) (ug/L) (grams) (pounds) by All
'
(liters) Wolle,
Q3 2010 NA NA NA NA NA NA NA 15.69
Q4 2010 NA NA NA NA NA NA NA 27.97
Ql 2011 NA NA NA NA NA NA NA 73.30
Q2 2011 NA NA NA NA NA NA NA 27.01
Q3 2011 NA NA NA NA NA NA NA 16.82
Q4 2011 NA NA NA NA NA NA NA 19.71
Ql 2012 NA NA NA NA NA NA NA 15.86
Q2 2012 NA NA NA NA NA NA NA 15.03
Q3 2012 NA NA NA NA NA NA NA 14.67
Q4 2012 NA NA NA NA NA NA NA 14.92
Ql 2013 NA NA NA NA NA NA NA 95.73
Q2 2013 NA NA NA NA NA NA NA 91.71
Q3 2013 NA NA NA NA NA NA NA 176.53
Q42013 NA NA NA NA NA NA NA 162.07
Ql 2014 NA NA NA NA NA NA NA 103.14
Q2 2014 NA NA NA NA NA NA NA 101.87
Q3 2014 NA NA NA NA NA NA NA 92.99
Q4 2014 NA NA NA NA NA NA NA 108.57
Ql 2015 NA NA NA NA NA NA NA 82.61
Q2 2015 NA NA NA NA NA NA NA 68.86
Q3 2015 NA NA NA NA NA NA NA 118.63
Q4 2015 NA NA NA NA NA NA NA 124.50
Ql 2016 NA NA NA NA NA NA NA 132.55
Q2 2016 NA NA NA NA NA NA NA 99.98
Q3 2016 NA NA NA NA NA NA NA 101.12
Q4 2016 NA NA NA NA NA NA NA 106.06
Ql 2017 NA NA NA NA NA NA NA 116.19
Q2 2017 NA NA NA NA NA NA NA 80.12
Q3 2017 NA NA NA NA NA NA NA 93.37
Q4 2017 NA NA NA NA NA NA NA 106.21
Ql 2018 NA NA NA NA NA NA NA 111.99
Q2 2018 73711.2 6.54 6540 278996.9 1824639673. 7 1824.6 4.02 84.14
Q3 2018 44981.6 6.13 6130 170255.2 1043664404.2 1043.7 2.30 61.86
Q4 2018 35431.5 6.02 6020 134108.2 807331529.6 807.3 1.78 98.49
Ql 2019 31903.6 6.71 6710 120755.1 810266895.5 810.3 1.79 101.08
Q2 2019 25146.5 6.00 6000 95179.5 571077015.0 571.1 1.26 101.72
Q3 2019 24045.6 6.22 6220 91012.6 566098347.1 566.1 1.25 80.19
Q4 2019 21186.4 6.11 6110 80190.5 489964101.6 490.0 1.08 76.97
Ql 2020 17289.9 6.12 6120 65442.3 400506701.6 400.5 0.88 86.86
Quarter
Q2 2020
Q3 2020
Q4 2020
Ql 2021
Q2 2021
Q3 2021
Q4 2021
Ql 2022
Q2 2022
Q3 2022
Q4 2022
Ql 2023
Q2 2023
Q3 2023
Q4 2023
Ql 2024
Totals Since
Q3 2010
Table 4
Quarterly Calculation of Nitrate Removed and Total Volume of Water Pumped
TW4-41
Total Total
Total Pumped Cone Cone Pumped Total (ug) Total Total Removed
(gal) (mg/L) (ug/L) (grams) (pounds) by All (liters) w .. 11 ..
17294.9 6.78 6780 65461.1 443826399.0 443.8 0.98 85.95
13411.4 6.69 6690 50762.3 339599536.5 339.6 0.75 81.69
17765.7 6.25 6250 67243.3 420270313.8 420.3 0.93 89.15
13407.5 6.41 6410 50747.3 325290026.0 325.3 0.72 88.22
13168.7 7.45 7450 49843.5 371334294.8 371.3 0.82 91.09
13821.0 3.77 3770 52312.4 197217640.4 197.2 0.43 56.81
12449.1 6.72 6720 47119.7 316644076.6 316.6 0.70 97.29
12247.8 6.20 6200 46357.9 287419122.6 287.4 0.63 54.84
11013.9 6.00 6000 41687.4 250124533.5 250.1 0 .55 51.61
11108.0 5.92 5920 42043.9 248899849.8 248.9 0.55 62.30
11722.6 6.00 6000 44369.9 266219337.6 266.2 0.59 63.06
11577.2 4.30 4300 43819.8 188425206.9 188.4 0.42 57.06
10239.7 6.27 6270 38757.2 243007811.1 243.0 0.54 67.30
10780.6 5.59 5590 40804.6 228097551.9 228.1 a.so 49.42
10952.1 5.78 5780 41453.7 239602377.3 239.6 0.53 46.43
11795.1 6.01 6010 44644.3 268312255.6 268.3 0.59 60.45
476451.40 24.6 4309.7
Table 5
Nitrate Data Over Time for MW-30, MW-31, MW-5, and MW-11
Date MW-30
Q22010
Q3 2010
Q42010
Ql 2011
Q22011
Q3 2011
Q4 2011
Ql 2012
Q2 2012
Q3 2012
Q4 2012
Ql 2013
Q22013
Q32013
Q42013
Ql 2014
Q22014
Q3 2014
Q42014
Ql 2015
Q2 2015
Q3 2015
Q4 2015
Ql 2016
Q22016
QJ2016
Q42016
Ql 2017
Q22017
Q;l 2017
Qi]017
Ql 2018
Q2 2018
Q3 2018
Q42018
Ql 2019
Q22019
Q3 2019
Q42019
Ql 2020
Q22020
Q3 2020
Q42020
Ql 2021
Q22021
Q3 2021
Q4 2021
QI 2022
Q22022
Q3 2022
Q42022
Ql 2023
Q22023
Q;l 2023
Q42023
Ql 2024
ND = Not detected
NS = Not Sampled
15 .8
15
16
16
17
16
16
17
16
17
18 .5
21.4
18 .8
17 .6
19 .5
18.4
19.4
16.8
16.2
14.9
17.0
17.9
16.3
20.0
17 .3
18.0
17 .2
17.4
17.5
19.2
17.4
17.6
17 .3
18 .0
17.3
17.9
18 .5
19.3
18.2
16.4
18.1
18.4
16.8
17.7
17.7
20.6
14.3
14.5
17.0
17.6
17.9
18.1
15.9
16.6
16.7
16.2
MW-31
22.5
21
20
21
22
21
21
21
20
21
23.6
19.3
23.8
21.7
23.9
20.6
23.1
18.9
20.9
18.7
19.0
19.9
18.4
18.8
18.6
19.7
18.8
21.1
18.3
19.5
19.2
18 .8
19 .0
20.1
18 .3
19.0
19 .7
19 .8
19 .8
17.5
18 .8
19.2
18.6
17.1
18.6
18 .7
18 .1
18.0
18.0
16.9
17.0
18.7
14.3
16 .6
18 .0
17 .1
MW-5 MW-II
ND ND
NS ND
0.2 ND
NS ND
0.2 ND
NS ND
0.2 ND
NS ND
0 .1 ND
NS ND
ND ND
NS ND
ND ND
NS ND
0.279 ND
NS ND
ND ND
NS ND
0.21 ND
NS ND
0.142 ND
NS ND
0.118 ND
NS ND
0.156 0.117
NS ND
0.241 ND
NS ND
0.133 ND
NS ND
0.337 ND
NS ND
0.216 ND
NS ND
0.309 ND
NS ND
0.260 ND
NS 0.558
0.235 0.160
NS 0.308
0.142 0.297
NS 0.651
0.191 0.933
NS 1.21
<0 .100 0.948
NS 0.924
0.313 1.50
NS 2.55
0.3 2.2
NS 2.12
0.21 2.90
NS 3.49
1.77 2.98
NS 3.22
0.290 3.96
NS 4.30
TABLE 6
Slug Test Results
(Using KGS Solution and Automatically Logged Data)
Well K
tcm/s\
MW-30 1.0E-04
MW-31 7.1E-05
TW4-22 1.3E-04
TW4-24 1.6E-04
TW4-25 5.8E-05
TWN-2 1.5E-05
TWN-3 8.6E-06
Average 1
Average2
Average3
Average4
Notes:
Average 1 = arithemetic average of all wells
Average 2 = geometric average of all wells
K
tftldav\
0.28
0.20
0.36
0.45
0.16
0.042
0.024
0.22
0.15
0.32
0.31
Average 3 = arithemetic average of MW-30, MW-31, TW4-22, and TW4-24
Average 4 = geometric average of MW-30, MW-31, TW4-22, and TW4-24
emfs = centimeters per second
ft/day= feet per day
K = hydraulic conductivity
KGS = KGS Unconfined Slug Test Solution in Aqtesolve TM.
Z:\Shared\Lakewood\Environmental\UT\WhiteMesaMill\Required Reports\Nitrate Quarterly Report\2023 Q1\FlowCalcs -Tables 6-7-8: Table
6
Well
TW4-22
TW4-24
Notes:
ft= feet
TABLE 7
Pre-Pumping Saturated Thicknesses
Depth to Depth to Water Saturated Thickness
Brushy Basin Fourth Quarter, 2012 Above Brushy Basin
(ft) (ft) (ft)
112 53 58
110 55 55
Z:\Shared\Lakewood\Environmental\UT\WhiteMesaMill\Required Reports\Nitrate Quarterly Report\2023 Q1\FlowCalcs -Tables 6-7-8: Table
7
TABLE 8
Pre-Pumping Hydraulic Gradients and Flow Calculations
Pathline Boundaries
TW4-25 to MW-31
TWN-2 to MW-30
Notes:
ft= feet
ft/ft = feet per foot
gpm = gallons per minute
Path Length
(ft)
2060
2450
Head Change Hydraulic Gradient
(ft) (ft/ft)
48 0.023
67 0.027
average 0.025
1 min flow (gpm) 1.31
2 max flow (gpm) 2.79
1 assumes width = 1,200 ft; saturated thickness = 56 ft; K = 0.15 ft/day; and gradient= 0.025 ft/ft
2 assumes width = 1,200 ft; saturated thickness = 56 ft; K = 0.32 ft/day; and gradient= 0.025 ft/ft
Z:\Shared\Lakewood\Environmental\UT\WhiteMesaMill\Required Reports\Nitrate Quarterly Report\2023 Q1\FlowCalcs -Tables 6-7-8: Table
8
Table 9
*Recalculated Background Flow
Background *Recalculated
Flow Background Flow
(acm) (aom)
minimum 1.31 0.79
maximum 2.79 1.67
• recalculated based on reduced widlife pond recharge as
presented in the third quarter, 2015 Nitrate Monitoring Report
gpm = gallons per minute
Table 10
Summary of 'Background' Flow Estimates
minimum maximum
(gpm) (gpm)
pre-pumping (Q2, 2010) 1.31 2.79
Q2 2015 re-calculation 0.79 1.67
Q2 2022 re-calculation 0.63 1.34
Notes:
02 = second quarter
gpm = gallons per minute
INDEX OF TABS
Tab A Site Plan and Perched Well Locations White Mesa Site
Tab B Order of Sampling and Field Data Worksheets
Tab C Kriged Current Quarter Groundwater Contour Map, Capture Zone Map, Capture Zone Details
Map, and Weekly, Monthly and Quarterly Depth to Water Data
Tab D Kriged Previous Quarter Groundwater Contour Map
Tab E Hydrographs of Groundwater Elevations over Time for Nitrate Monitoring Wells
Tab F Depths to Groundwater and Elevations over Time for Nitrate Monitoring Wells
Tab G Laboratory Analytical Reports
Tab H Quality Assurance and Data Validation Tables
H-1 Field Data QA/QC Evaluation
H-2 Holding Time Evaluation
H-3 Analytical Method Check
H-4 Reporting Limit Evaluation
H-5 QA/QC Evaluation for Sample Duplicates
H-6 QC Control Limits for Analyses and Blanks
H-7 Receipt Temperature Evaluation
H-8 Rinsate Evaluation
Tab I Kriged Current Quarter Isoconcentration Maps
Tab J Analyte Concentration Data over Time
Tab K Concentration Trend Graphs
Tab L CSV Transmittal Letter
Tab M Residual Mass Estimate Analysis Figure
Tab A
Site Plan and Perched Well Locations White Mesa Site
DR-14
OR-17
DR-20 n. [. , .....
MW-418 perched monitoring well -¢-installed April, 2023
TW4-43
~ temporary perched monitoring well
installed September, 2021
TWN-20
Cl temporary perched nitrate monitoring
well installed April, 2021
MIIV-24A perched monitoring well installed (i) December 2019
TW4-42
¢ temporary perched monitoring well
installed April 2019
TW4-40 perched chloroform pumping well EB installed February 2018
TW4 -19
EB perched chloroform or
nitrate pumping well
MW-5 • perched monitoring well
TW4-12
0 temporary perched monitoring well
TWN-7 temporary perched nitrate monitoring ~ well
PIEZ-1
perched piezometer ~
RUIN SPRING
b seep or spring
DR-06 .
DR-1D .
• MW-21
DR-11 • DR-12 .
• MW-3A
DR-13 .
• MW-29
•
-
• MW-01
.1b:inc}ortt.d
0
TWN-05
• MW-18
0
,-,Z;,~,:,, • .:-a•l'f',!
0
TWN-15
0
TWN-11
0
TWN-1•
<ib<tnll-d
0
TWN-10
<ibm11fanc1)
0
TWN-06
•;,_1t1).IJ1ll,'t;
0
TWN-08
0
TWN-09
PIEZ-01
• MW-19
D o
TWN-20 TWN-07
TWN-18
Celt 2
• MW-JD
Cell 3
• MW-17
-,.wi.oa
• fwt .of rwi-o4' W,l_l ,.Mill Site ' "-\!¼M.,~
·o •
TWN•D :Plf,i;JA
TW-b1B
4'~~-~~~4-~4-!IS
TW~~~~~~ w-. '-12
I.IW-Ufl ,,G . '0 'fj'b
• MW-31
~!~TW~ l !l'♦,:ra,8Y4-3J
TWc-,_s:;rw1-r1 IW4-l3 o ;v .,._laY•--02 0
'rw 'if..•~~W'.o'-:
~'ill.~~w•-'3& • ---i,,,n-.01
,l\'{~!':rw~•~
" l'l,l I,' ,C.j,£
,-1 • ..,~JW-YI~ "i':l\'fo'~d1, '~, ,<v~' ~ .... ~, T\Vol'l!li!:) Q O I vv4._
1W4;ig: '= aT.W4!43 t' '!W,i.!(4 o f?w~s
TW•-42¢
.
PIEZ-05
• MW-10
..i.ol!"'-'I
0
TWN-12 O
0
TWN-16
• ·110,:ino .-J
0
TWN-17
TWN-19
DR-15 .
-.,
DR-21
• MW-20
--..... -... ·111.--.
HYDRO
GED
~ • MW-39 "' LU • ~ MW-38
LU ,__ ---·------~~ .. • ~-~'t ...,_ .,~r
MW-22 ~
~
1 mile
WHITE MESA SITE PLAN SHOWING LOCATIONS OF
PERCHED WELLS AND PIEZOMETERS
CHEM, INC. A PPROVED DA TE REFERENCE
H :/718000/aug23/Uwelloc1223.srf
FIGURE
A-1
TabB
Order of Sampling and Field Data Worksheets
Nitrate Samples
Nitrate
Mg/L
Previous
Name Qrt. Date/Purge sample
lWN-18
lWN-20
0.34 IY"'"' I: 0.37 'LJ IS /2.lf
lWN-21 1.1 l;:i.115/&':J 1og':l5
lWN-04 2.29
lWN-01 3.43
lWN-02 14.6 12.11'-t /J..L{ I I 11 Q
lWN-07 15.60
lWN-03 31.4
"f-AJ ,.....,,.,_(,.5
Duplicate of 18
DI Sample
Piez-02 0.92
Piez-01 6.74
Piez-03A 12
g,_/ 15 / .;i.~ D855
:J-115/J~ 0 'f ().5
I
Nitrate Order
1ST Quarter 2024
Depth Tqtal Depth
125.7
112.5
105
96
I I
I I
Rinsate Samples
Name Date Sample
iwN-lg iz. ~' ?._l _1'1_/z_'i __ ·o _8 oZ>_~
Samplers: --r-n,,~r-Yo J /.~°' ~
D~en L~r110<t1
Groundwater Discharge Permit
~£-.-; • . .
,____,,,_ -, /,/ ' .EAIERGY~
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID PIEZ-01 Sampling Program Nitrate Quarterly
Field Sample ID Piez-01 _02152024 Sampling Event 2024 Q1 Nitrate
Purge Date & Time 2/15/2024 9:35
Sample Date & Time 2/15/2024 9:35 !sampler TH/DL
Purging Equipment Bailer Weather Conditions Cloudy
Pump Type Grundfos External Ambient Temperature (C) 4
Purging Method 2Casings Previous Well Sampled Piez-02
Casing Volume ()
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7.0 Well Depth (ft) 107.50
pH Buffer 4.0 4.0 Well Casing Diameter (in) 1
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 67.95
Conductivity Dissolved
Date/Time Gallons Purged (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
2/15/2024 9:35 2546 7.38 13.56 348 46.0 72.3
Pumping Rate Calculations
[volume of water purged () Flow Rate (Q = S/60) ()
Time to evacuate 2 Casing Volumes ()
[Final Depth to Water (feet) 68.45 Number of casing Volumes
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected Matrix Number Type Sample Filtered? Type Added?
Chloride y WATER 1 500-ml Poly u None N
Nitrate/nitrite as N y WATER 1 250-ml HDPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Arrived on site at 0928 . Samples bailed and collected at 0935. Water was a little murky. Left site at 0941 ,
Signature of Field Technician
~~,,,,,.~'--+;I ;--//.~-) -<,
XI>~
s,;;~EA'ERGYFVELS
Location ID
Field Sample ID
Purge Date & Time
Sample Date & Time
Purging Equipment
Pump Type
Purging Method
Casing Volume ()
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0
pH Buffer 4.0
Specific Conductance (micromhos)
Date/Time Gallons Purged
2/15/2024 9:15
[volume of water purged ()
/Final Depth to Water (feet)
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Type of Sample/Analysis
Chloride
Nitrate/nitrite as N
Comments:
Groundwater Discharge Permit
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
PIEZ-02 Sampling Program Nitrate Quarterly
Piez-02_02152024 Sampling Event 2024 Q1 Nitrate
2/15/2024 9: 15
2/15/2024 9: 15 !sampler TH/DL
Bailer Weather Conditions Cloudy
Grundfos External Ambient Temperature (C) 4
2 Casings Previous Well Sampled TWN-03
7.0 Well Depth (ft) 100.00
4.0 Well Casing Diameter (in) 1
1000 Depth to Water Before Purging (ft) 48.14
Conductivity Dissolved
(um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
1015 7.25 13.45 359 1.0 36.2
Pumping Rate Calculations
Flow Rate (Q = S/60) ()
Time to evacuate 2 Casing Volumes ()
48.78 Number of casing Volumes
Volume, if well evacuated to dryness () 0
Sample Container Preservative
Collected? Matrix Number Type Sample Filtered? Type Added?
y WATER 1 500-ml Poly u None N
y WATER 1 250-ml HOPE u H2SO4 (pH<2), 4 Deg C y
I Arrived on site at 0910. Samples bailed and collected at 0915. Water was mostly clear. Left site at 0925.
Signature of Field Technician
---.._ ,··/,>;/
--.__J r~ .,:_p_~~---c.--;-;/~. ·-:.,_./._ d~:::j
Groundwater Discharge Permit
t~· ~~y~
Groundwater Mon itoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID PIEZ-03A Sampling Program Nitrate Quarterly
Field Sample ID Piez-03A_02152024 Samplin9 Event 2024 Ql Nitrate
Purge Date & Time 2/15/2024 9:54
Sample Date & Time 2/15/2024 10:00 [sampler TH/DL
Purging Equipment Bailer Weather Conditions Cloudy
Pump Type Grundfos External Ambient Temperature (C) 5
Purging Method 2 Casings Previous Well Sampled Piez-01
Casing Volume ()
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7 .0 Well Depth (ft) 79 .00
pH Buffer 4.0 4.0 Well Casing Diameter (in) 1
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 58.28
Conductivity Dissolved
Date/Time Gallons Purged (umhos/cm) pH {pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
2/15/2024 10:00 1109 7.38 13.57 331 210.0 89 .0
Pumping Rate Calculations
[volume of water purged () Flow Rate (Q = S/60) ()
Time to evacuate 2 Casing Volumes ()
[Final Depth to Water (feet) 58.99 Number of casing Volumes
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
Chloride y WATER 1 500-ml Poly u None N
Nitrate/nitrite as N y WATER 1 250-ml HOPE u H2S04 (pH<2), 4 Deg C y
Comments: I Arrived on site at 0952 . Sam ples bailed and colle~ted at 1000. Water was a little murky . Left site at 1010 .
Signature of Field Technician
--,_ •• .//~ /
---1:1-' :._p_.,• __ .. :L--/-/~ :_,/i-~<}
Groundwater Discharge Permit
~~~~._. '. tF-,.·. _/ ·> ..._. ;·
' , l,
.' ~y~
Groundwater Monttoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TWN-01 Sampling Program Nitrate Quarterly
Field Sample ID TWN-01 02142024 Sampling Event 2024 Ql Nitrate
Purge Date & Time 2/14/2024 10:49
Sample Date & Time 2/14/2024 10:54 [sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 3
Purging Method 2 Casings Previous Well Sampled TWN-04
Casing Volume (gal) 22.70
Calculated Casing Volumes Purge Duration (min) 4.12
pH Buffer 7.0 7.0 Well Depth (ft) 106.13
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 71.36
Conductivity Dissolved
Date/Time Gallons Purged (gal) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
2/14/202410:51 22.00 946 6.92 15.15 562 2.5 46.5
2/14/2024 10:52 33 .00 939 6.95 15.19 553 2.9 45 .0
2/14/2024 10 :53 44 .00 944 6.98 15.21 543 3.0 47.0
2/14/2024 10:54 55.00 959 7.00 15.20 539 3.1 50.0
Pumping Rate Calculations
-
[volume of water purged (gals) 55.00 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 5.00
I Final Depth _t~ Water (feet) 100.03 Number of casing Volumes 2.00
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
Chloride y WATER 1 500-ml Poly u None N
Nitrate/nitrite as N y WATER 1 250-ml HOPE u H2SO4 (pH<2), 4 Deg C y
Comments: I Arrived on site at 1045. Purge began at 1049. Purged well for a total of 5 minutes. Pu rge ended and samples collected at 1054 . Water was clear. Left site at 1057 .
Signature of Field Technician
~j,'..N•,<__..·/-/-c:'.'.2~
Groundwater Discharge Permit
~~ ~ ENER'GYFLTELS
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TWN-02 Sampling Program Nitrate Quarterly
Field Sample ID TWN-02 _02142024 Sampling Event 2024 Q1 Nitrate
Purge Date & Time 2/14/2024 11:09
Sample Date & Time 2/14/2024 11:10 [sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 4
Purging Method 2 Casings Previous Well Sampled TWN-01
Casing Volume (gal) 21.34
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7.0 Well Depth (ft) 95.90
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 63.21
Conductivity Dissolved
Date/Time Gallons Purged (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
2/14/202411:10 1989 6.95 14.11 397 0 91.3
Pumping Rate Calculations
[volume of water purged () Flow Rate (Q = S/60) (gal/min) 16.00
Time to evacuate 2 Casing Volumes ()
[Final Depth to Water (feet) 88 .45 Number of casing Volumes
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
Chloride y WATER 1 500-ml Poly u None N
Nitrate/nitrite as N y WATER 1 250-mLHDPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Arrived on site at 1105. Samples collected at 1110. Water was clear. Left site at 1113 .
Signature of Field Technician
~ ••• •./✓-:/
--.__] , , "'-"-C--r;r-. -:,'£ ,<.<)
Groundwater Discharge Permit c-~t£1 ... r---::::~~ , ,
------: •• -,, j • . E/',,1ERG' y F<AEZ-5
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TWN-03 Sampling Pro_g_ram Nitrate Quarterly
Field Sample ID TWN-03 _02152024 Sampling Event 2024 Ql Nitrate
Purge Date & Time 2/14/2024 12:50
Sample Date & Time 2/15/2024 9:05 [sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 7
Purging Method 2 Casings Previous Well Sampled TWN-07
Casing Volume (gal) 33.56
Calculated Casing Volumes Purge Duration (min) 6.10
pH Buffer 7.0 7.0 Well Depth (ft) 96.00
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 44.60
Conductivity Dissolved
Date/Time Gallons Purged (gal) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%)
2/14/2024 12:54 46.75 2422 7.09 14.91 477 13.3 46.0
2/15/2024 9:05 2396 7.25 14.63
2/15/2024 9:06 2397 7.24 14.59
Pumping Rate Calculations
jvolume of water purged (gals) 46.75 Flow Rate (Q = S/60) (gal/min)
Time to evacuate 2 Casing Volumes (min) I Final Depth to Water (feet) 92.97 Number of casing Volumes
Volume, if well evacuated to dryness (gals)
Name of Certified Analytical Laboratory
AWSL
Anal~lcal Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type
Chloride y WATER 1 500-mL Poly u None
Nitrate/nitrite as N y WATER 1 250-mL HDPE u H2SO4 (pH<2), 4 Deg C
Comments:
Arrived on site at 1245. Purge began at 1250. Purged well for a total of 4 minutes and 15 seconds. Purged well dry. Purge ended at 1254. Water was mostly clear. Left site at 1257.
Arrived on site at 0900. Depth to water was 45.45. Samples bailed and collected at 0905. Left site at 0907.
Signature of Field Technician
~j, :_,v_cc___,-f--/--c:2~)
Before/After
Before
After
11.00
4.25
1.39
46.75
Added?
N
y
Groundwater Discharge Permit
~~ -. (· ,,
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TWN -04 Sampling _Program Nitrate Quarterly
Field Sample ID TWN-04 _02142024 Sampling Event 2024 Ql Nitrate
Purge Date & Time 2/14/2024 10:13
Sample Date & Time 2/14/2024 10:21 [sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 2
Purging Method 2 Casings Previous Well Sampled TWN-21
Casing Volume (gal) 40.49
Calculated Casing Volumes Purge Duration (min) 7 .3 6
pH Buffer 7.0 7.0 Well Depth (ft) 126.40
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 64.38
Conductivity Dissolved
Date/Time Gallons Purged (gal) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
2/14/2024 10:18 66.00 1074 6.71 14.75 522 0 69.3
2/14/202410:19 77.00 1071 6.75 14.75 510 0 68.1
2/14/2024 10 :2 0 88.00 1068 6.82 14.76 499 0 67 .0
2/14/2024 10:21 99.00 1066 6.87 14.76 492 0 66.3
Pumping Rate Calculations
!volume of water purged (gals) 99 .00 Flow Rate (Q == S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 9.00
I Final Depth to Water (feet) 65.19 Number of casing Volumes 2.00
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
Chloride y WATER 1 500-ml Poly u None N
Nitrate/nitrite as N y WATER 1 250-ml HDPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Arrived on site at 1008 . Purge began at 1012. Pu rged well for a total of 9 minutes. Purge ended and samples collected at 1021 . Water was mos Uy clear . Left site at 1024.
Signature of Field Technician
--,,_ /;-: ./
-.__) , ,c,v-L--f-/ ''.._/'.<.,?)
~~
~,-~YFUELS
Location ID
Field Sample ID
Purge Date & Time
Sample Date & Time
Purging Equipment
Pump Type
Purging Method
Casing Volume (gal)
Calculated Casing Volumes Purge Duration (min)
pH Buffer 7.0
pH Buffer 4.0
Specific Conductance (micromhos)
Date/Time Gallons Purged (gal)
2/14/202412:17 22.00
2/15/2024 8:55
2/15/2024 8:56
!Volume of water purged (gals)
I Final Depth to Water (feet)
Name of Certified Analytical Laboratory
AWSL
Analytical ~ameles Information
Groundwater Discharge Permit
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
TWN-07 Sampling_ Pro_gram Nitrate Quarterly
TWN-07 _02152024 Sampling Event 2024 Ql Nitrate
2/14/202412:15
2/15/2024 8:55 [sampler TH/DL
Pump Weather Conditions Sunny
Grundfos External Ambient Temperature (C) 7
2 Casings Previous Well Sampled TWN-02
18.29
3.32
7.0 Well Depth (ft) 107.20
4.0 Well Casing Diameter (in) 4
1000 Depth to Water Before Purging (_ft) 79.18
Conductivity Dissolved
(um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
1794 7.20 14.70 430 0 84.3
1947 7.60 14.31 Before
1950 7.58 14.36 After
Pumping Rate Calculations
22.00 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 2.00
104.96 Number of casing Volumes 1.20
Volume, if well evacuated to dryness (gals) 22.00
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
Chloride y WATER 1 500-ml Poly u None
Nitrate/nitrite as N y WATER 1 250-ml HOPE u H2S04 (pH<2), 4 Deg C
Comments:
Arrived on site at 1210. Purge began at 1215. Purged well for a total of 2 minutes. Purged well dry. Purge ended at 1217. Water was clear. Left site at 1220.
Arrived on site at 0850. Depth to water was 90.04. Samp_les bailed and collected at 0855. Left site at 0857 .
Signature of Field Technician
~., ,,,u>c__.-/-/~~)
N
y
~ .. It-~ I ·, =-~YFLIEZ.S" --/c;;:~ ~
Location ID
Field Sample ID
Purge Date & Time
Sample Date & Time
Purging Equipment
Pump Type
Purging Method
Casing Volume (gal)
Calculated Casing Volumes Purge Duration (min)
pH Buffer 7.0
pH Buffer 4.0
Specific Conductance (micromhos)
Date/Time Gallons Purged (gal)
2/14/2024 8:32 88.00
2/14/2024 8:33 99.00
2/14/2024 8:34 110.00
2/14/2024 8:35 121.00
(yolume of water purged (gals)
[Final Depth to Water (feet)
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Type of Sample/Analysis
Chloride
Nitrate/nitrite as N
Comments:
Groundwater Discharge Permit
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
TWN-18 Sampling Program Nitrate Quarterly
TWN-18_02142024 Sampling_ Event 2024 Q1 Nitrate
2/14/2024 8:24
2/14/2024 8:35 !sampler TH/DL
Pump Weather Conditions Partly cloudy
Grundfos External Ambient Temperature (C) -1
2 Casings Previous Well Sampled TWN-18R
54.70
9.94
7.0 Well Depth (ft) 147.00
4.0 Well Casing Diameter (in) 4
1000 Depth to Water Before Purging (ft) 63.23
Conductivity Dissolved
(um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
2962 6.88 14.44 299 2.3 0
2953 6.89 14.46 298 2.5 0
2951 6.89 14.45 297 2.6 0
2950 6.80 14.37 296 2.7 0
Pumping Rate Calculations
121.00 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 11.00
66.89 Number of casing Volumes 2.00
Volume, if well evacuated to dryness () 0
Sample Container Preservative
Collected? Matrix Number Type Sample Filtered? Type Added?
y WATER 1 500-ml Poly u None N
y WATER 1 250-ml HDPE u H2SO4 (pH<2), 4 Deg C y
I Arrived on site at 0818. Purge began at 0824. Purged well for a total of 11 minutes. Purge ended and samples collected at 0835. Water was clear. Left site at 0839.
Signature of Field Technician
~,,, :,,,,-c_,-f-/ ~~
Groundwater Discharge Permit
r--~•=-~ t=~~ .. ...,...._,.
-,.
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TWN-18R Sampling Program
Field Sample ID TWN-18R _02142024 Sampling Event 2024 Q1 Nitrate
Purge Date & Time
Sample Date & Time 2/14/2024 8:00 !sampler TH/DL
Purging Equipment Weather Conditions
Pump Type External Ambient Temperature ()
Purging Method Previous Well Sampled
Casing Volume ()
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 Well Depth (ft)
pH Buffer 4.0 Well Casing Diameter()
Specific Conductance () Depth to Water Before Purging (ft)
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
2/14/2024 7:59 133.00 13.2 7.77 14.76 345 4.9 46.4
Pumping Rate Calculations
lvolu'!I~ of water purged () Flow Rate (Q = S/60) ()
Time to evacuate 2 Casing Volumes ()
!Final Depth to Water (feet) Number of casing Volumes
Volume, if well evacuated to dryness ()
Name of Certified Analytical Laboratory
AWSL
Ana lytica l Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
Chloride y WATER 1 500-ml Poly u None N
Nitrate/nitrite as N y WATER 1 250-mLHDPE u H2SO4 (pH<2), 4 Deg C y
Comments:
Signature of Field Technician
~u, Cn;">L---f;/. 44)
,~
~~YFUEZS
Location ID
Field Sample ID
Purge Date & Time
Sample Date & Time
Purging Equipment
Pump Type
Purging Method
Casing Volume (gal)
Calculated Casing Volumes Purge Duration (min)
pH Buffer 7.0
pH Buffer 4.0
Specific Conductance (micromhos)
Date/Time Gallons Purged (gal)
2/14/2024 9 :05 14.66
2/15/2024 8 :30
2/15/2024 8:31
[volume of water purged (gals)
[Final Depth to Water (feet)
Name of Certified Analytical Laboratory
AWSL
Anal}'fica! Safll_ples Information
Type of Sample/Analysis
Chloride
Nitrate/nitrite as N
Comments:
Groundwater Discharge Permit
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
TWN-20 Sampling Program Nitrate Quarterly
TWN-20 _02152024 Sampling Event 2024 Ql Nitrate
2/14/2024 9:04
2/15/2024 8:30 !Sampler TH/DL
Pump Weather Conditions Partly cloudy
Grundfos External Ambient Temperature (C) 0
2Casings Previous Well Sampled TWN-18
12.97
2.35
7 .0 Well Depth (ft) 98.20
4.0 Well Casing Diameter (in) 4
1000 Depth to Water Before Purging (ft) 78.33
Conductivity Dissolved
(umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%)
2949 6 .64 14.38 464 0 .5 8.0
2956 7 .32 14.98
2960 7.30 14.95
Pumping Rate Calculations
14.66 Flow Rate (Q = S/60) (gal/min)
Time to evacuate 2 Casing Volumes (min)
96.12 Number of casing Volumes
Volume, if well evacuated to dryness (gals)
Sample Container Preservative
Collected? Matrix Number Type Sample Filtered? Type
y WATER 1 500-mL Poly u None
y WATER 1 250-mL HDPE u H2SO4 (pH<2), 4 Deg C
Arrived on site at 0900 . Purge began at 0904. Purged well for a total of 1 minute and 20 seconds. Purged well dry. Purge ended at 0905. Water was clear. Left site at 0908 .
Arrived on site at 0825. Depth to water was 78.53 . Sameles bailed and collected at 0830 . Left site at 0832 .
Signature of Field Technician
~ . /2 ~ /
--..__) ,~ c,v~L--r,/, -«.::r...<)
Before/After
Before
After
11.00
1.33
1.13
14.66
Added?
N
y
Groundwater Discharge Permit
8 ~e-t£· --, _, /i -' _.-~y~ ,... ', 1
i / j
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TWN-21 Sampling Program Nitrate Quarterly
Field Sample ID TWN-21_02152024 Same_ling Event 2024 Ql Nitrate
Purge Date & Time 2/14/2024 9:36
Sample Date & Time 2/15/2024 8:45 [same_ler TH/DL
Purging Equipment Pump Weather Conditions Partly cloudy
Pump Type Grundfos External Ambient Temperature (C) 0
Purging Method 2 Casings Previous Well Sampled TWN-20
Casing Volume (gal) 19.32
Calculated Casing Volumes Purge Duration (min) 3.51
pH Buffer 7.0 7.0 Well Depth (ft) 108.65
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 79.05
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%)
2/14/2024 9:38 24.75 3763 6.83 14.70 308 0 99.2
2/15/2024 8 :45 3745 7 .23 14.46
2/15/2024 8:46 3752 7.21 14.50
Pumping Rate Calculations
!volume o_f water purged (gals) 24.75 Flow Rate (Q = S/60) (gal/min)
Time to evacuate 2 Casing Volumes (min)
[ Final Depth to Water (feet) 106.12 Number of casing Volumes
Volume, if well evacuated to dryness (gals)
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type
Chloride y WATER 1 500-mL Poly u None
Nitrate/nitrite as N y WATER 1 250-mL HDPE u H2SO4 (pH<2), 4 Deg C
Comments :
Arrived on site at 0932. Purge began at 0936. Purged well for a total of 2 minutes and 15 seconds . Purged well dry . Water was clear. Purge ended at 0938 . Left site at 0941 .
Arrived on site at 0840 . Depth to water was 79.21. Samples bailed and collected at 0845 . Left site at 0847 .
Signature of Field Technician
~:~..,:..,i~..,.·--~-J;,-,t\ _.1 ,;,
Before/After
Before
After
11.00
2.25
1.28
24.75
Added?
N
y
Groundwater Discharge Permit
~~.
-. t' --,· --E!·-F-:, . )' ,. E.#¥ERGY~
, J
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID 1W4-22 Sampling Program Chloroform Monitoring
Field Sample ID 1W4-22_02212024 Sampling Event 2024 Q1 Chloroform
Purge Date & Time 2/21/202412:29
Sample Date & Time 2/21/202412:30 !sampler TH/DL
Purging Equipment Pump Weather Conditions Partly cloudy
Pump Type Grundfos External Ambient Temperature (C) 12
Purging Method 2 Casings Previous Well Sampled 1W4-24
Casing Volume (gal) 26.93
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7.0 Well Depth (ft) 114.70
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 73.45
Conductivity Dissolved
Date/Time Gallons Purged (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
2/21/2024 12:29 5184 6.51 15.88 359 3.0 28.7
Pumping Rate Calculations I volume of water purged () Flow Rate (Q = S/60) (gal/min) 16.00
Time to evacuate 2 Casing Volumes ()
jFinal Depth to Water (feet) 107.63 Number of casing Volumes I
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
voes-Chloroform y WATER 3 40mlVOA u HCL (pH<2), 4 Deg C y
Chloride y WATER 1 500-mLPoly u None N
Nitrate/nitrite as N y WATER 1 250-mLHDPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Arrived on site at 1225 . Samples collected at 1230. Water was clear. Left site at 1232 .
Signature of Field Technician
~,,,,cu---/-;I:-«,:~)
Groundwater Discharge Permit
c--~e-----F-·· --,-~--/i' • .
: -j.1.,· ~y~
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-24 Sampling Program Chloroform Monitoring
Field Sample ID TW4-24 _02212024 Sampling_ Event 2024 Ql Chloroform
Purge Date & Time 2/21/202412:19
Sample Date & Time 2/21/2024 12:20 [sampler TH/DL
Purging Equipment Pump Weather Conditions Partly cloudy
Pump Type Grundfos External Ambient Temperature (C) 12
Purging Method 2Casings Previous Well Sampled TW4-25
Casing Volume (gal) 27.41
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7.0 Well Depth (ft) 114.80
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 72.81
Conductivity Dissolved
Date/Time Gallons Purged (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
2/21/2024 12:20 6744 6.81 14.78 374 0 27.4
Pumping Rate Calculations
[volume of water pu_l'ged () Flow Rate (Q = S/60) (gal/min) 16.00
Time to evacuate 2 Casing Volumes ()
[ Final Depth to Water (feet) 100.23 Number of casing Volumes
Volume, if well evacuated to dryness O 0
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
VOCs-Chloroform y WATER 3 40mlVOA u HCl (pH<2), 4 Deg C y
Chloride y WATER 1 500-ml Poly u None N
Nitrate/nitrite as N y WATER 1 250-ml HDPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Arrived on site 1216. Samples collected at 1220. Water was clear. Left site at 1222.
Signature of Field Technician
-=-=:i . ,~,,,·-~ -1-/-. -:L ~)
Groundwater Discharge Permit
~e ---· rF-:·'· -)'
~-.... ~ ,• . ~
• !.· ~y
; '
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-25 Sampling Program Chloroform Monitoring
Field Sample ID TW4-25_02212024 Sampling Event 2024 Ql Chloroform
Purge Date & Time 2/21/2024 12:07
Sample Date & Time 2/21/2024 12:08 [sampler TH/DL
Purging Equipment Pump Weather Conditions Partly cloudy
Pump Type Grundfos External Ambient Temperature (C) 12
Purging Method 2 Casings Previous Well Sampled TW4-21
Casing Volume (gal) 43.40
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7.0 Well Depth (ft) 136.70
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 70.23
Conductivity Dissolved
Date/Time Gallons Purged (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
2/21/2024 12:07 2501 7.05 15.48 361 4.8 78.5
Pumping Rate Calculations
[volume of water P!-'rged O Flow Rate (Q = S/60) (gal/min) 15.00
Time to evacuate 2 Casing Volumes ()
[Final Depth to Water (feet) 110.47 Number of casing Volumes
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
voes-Chloroform y WATER 3 40mlVOA u HCl (pH<2), 4 Deg C y
Chloride y WATER 1 500-ml Poly u None N
Nitrate/nitrite as N y WATER 1 250-mLHDPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Arrived on site at 1205 . Samples collected at 1208. Water was clear. Left site at 1210_
Signature of Field Technician
~ . /.>; /
-__) .,~:1~:-L--r;/:_~,_~d <)
Groundwater Discharge Permit
~S-t£\--_,
.
•.
'
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_.-j
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID lWN-60 Sampling Program Nitrate Quarterly
Field Sample ID lWN-60_02152024 Sampling Event 2024 Q1 Nitrate
Purge Date & Time 2/15/2024 12:29
Sample Date & Time 2/15/2024 12:30 [sampler TH/DL
Purging Equipment Pump Weather Conditions Clody
Pump Type Grundfos External Ambient Temperature (C) 6
Purging Method 2 Casings Previous Well Sampled Piez-03A
Casing Volume ()
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7.0 Well Depth (ft)
pH Buffer 4.0 4.0 Well Casing Diameter ()
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft)
Conductivity Dissolved
Date/Time Gallons Purged (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
2/15/2024 12:30 1.7 7.43 13 .62 486 5.3 21.5
Pumping Rate Calculations
[volume of water purged () Flow Rate (Q = S/60) ()
Time to evacuate 2 Casing Volumes ()
[ Final Depth to Water (feet) Number of casing Volumes
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
Chloride y WATER 1 500-ml Poly u None N
Nitrate/nitrite as N y WATER 1 250-ml HOPE u H2S04 (pH<2), 4 Deg C y
Comments:
[ di samples collected in the the lab at 1230. Left site at 1234.
Signature of Field Technician
----... I ',//{./
-.__) u _,':..JV_.:~ -r;A -_ . .J:.,_ :-t:"-;__;::')
Groundwater Discharge Permit
~ . J' S ·t,;::.· -.·
~y~
• '
Groundwater Monitoring Quallty Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-60 Sampling Program Chloroform Monitoring
Field Sample ID TW4-60 _02222024 Sampling Event 2024 Ql Chloroform
Purge Date & Time 2/22/2024 7:29
Sample Date & Time 2/22/2024 7:30 [sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 20
Purging Method 2 Casings Previous Well Sampled TW4-19
Casing Volume ()
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7.0 Well Depth (ft)
pH Buffer 4.0 4.0 Well Casing Diameter ()
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft)
Conductivity Dissolved
Date/Time Gallons Purged (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
2/22/2024 7:30 1.2 7.85 16.05 408 1.8 11.6
Pumping Rate Calculations
[volume of water purged () Flow Rate (Q = S/60) ()
Time to evacuate 2 Casing Volumes ()
!Final Depth to Water (feet) Number of casing Volumes
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
voes-Chloroform y WATER 3 40mlVOA u HCl (pH <2 ), 4 Deg C y
Chloride y WATER 1 500-mLPoly u None N
Nitrate/nitrite as N y WATER 1 250-ml HOPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Di sample collected in the lab at 0730. Left site at at 0732 .
Signature of Field Technician
Groundwater Discharge Permit
~£y-,,
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID lWN-65 Sampling Program
Field Sample ID lWN-65_02142024 Sampling Event 2024 Ql Nitrate
Purge Date & Time
Sample Date & Time 2/14/2024 8:35 [sampler TH/DL
Purging Equipment Weather Conditions
Pump Type External Ambient Temperature ()
Purging Method Previous Well Sampled
Casing Volume ()
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 Well Depth (ft)
pH Buffer 4.0 Well Casing Diameter()
Specific Conductance () Depth to Water Before Purging (ft)
Dissolved
Date/Time Gallons Purged Conductivity pH Teme_ Redox Turbidity Oxygen I Before/After
Pumping Rate Calculations
[volume of water purged () Flow Rate (Q = S/60) ()
Time to evacuate 2 Casing Volumes ()
[Final Depth to Water (fe~tl Number of casing Volumes
Volume, if well evacuated to dryness ()
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
Chloride y WATER 1 500-ml Poly u None N
Nitrate/nitrite as N y WATER 1 250-ml HDPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Duplicate of TWN-18
Signature of Field Technician
~c,,'_'1;'.,,L..--/;/-.-/4~
TabC
Kriged Current Quarter Groundwater Contour Map, Capture Zone Map, Capture Zone Details Map, and
Weekly, Monthly and Quarterly Depth to Water Data
Name: Tanner Holliday
Date: 3/25/2024 -3/26/2024
Depth to Depth to Depth to Water
Date Time Well Water (ft.) Date Time Well Water (ft.) Date Time Well (ft.)
3/26/2024 1436 MW-01 65 .00 3/25/2024 1012 MW-04 83.49 3/26/2024 1417 PIEZ-01 67.50
3/26/2024 1304 MW-02 109 .12 3/25/2024 1018 TW4-0l 100.55 3/26/2024 1412 PIEZ-02 47.85
3/26/2024 933 MW-03A 83 .86 3/25/2024 1007 TW4-02 102 .46 3/26/2024 1407 PIEZ-03A 57 ,90
3/26/2024 1308 MW-05 107 ,27 3/26/2024 1206 TW4-03 66.42 3/26/2024 1230 PIEZ-04 70,10
3/26/2024 1239 MW-11 85 .13 3/25/2024 1029 TW4-04 85.46 3/26/2024 1233 PIEZ-05 68,35
3/26/2024 1311 MW-12 108 ,95 3/26/2024 1204 TW4-05 73 .80 3/26/2024 1354 TWN-01 71.15
3/26/2024 1338 MW-14 100 .74 3/26/2024 1220 TW4-06 81 00 3/25/2024 931 TWN-02 81 13
3/26/2024 1330 MW-15 104 ,51 3/26/2024 1216 TW4-07 83.27 3/26/2024 1401 TWN-03 44 72
3/26/2024 930 MW-17 72.49 3/26/2024 1213 TW4-08 85.96 3/26/2024 1451 TWN-04 64 04
3/26/2024 1433 MW-18 74 .08 3/26/2024 1206 TW4-09 71.80 3/26/2024 1430 TWN-06 80 .92
3/26/2024 1415 MW-19 66.89 3/26/2024 1201 TW4-10 71.12 3/26/2024 1439 TWN-07 78 .97
3/26/2024 815 MW-20 85 60 3/25/2024 1002 TW4-ll 90.01 3/26/2024 1421 TWN-14 58.32
3/26/2024 800 MW-22 65 .97 3/26/2024 958 TW4-12 57.35 3/26/2024 1424 TWN-16 47 .69
3/26/2024 1314 MW-23 113 ,61 3/26/2024 1010 TW4-13 58 26 3/26/2024 1403 TWN-18 62 90
3/26/2024 1257 MW-24A 109 .00 3/26/2024 1015 TW4-14 77.52 3/26/2024 1045 TWN-19 53 81
3/26/2024 1256 MW-24 107 ,80 3/26/2024 1248 TW4-16 74 95 3/26/2024 1441 TWN-20 78 10
3/26/2024 1235 MW-25 82 .86 3/26/2024 1356 TW4-18 74.47 3/26/2024 1444 TWN-21 78 .70
3/25/2024 957 MW-26 85.27 3/25/2024 1030 TW4-19 73 98 3/26/2024 914 DR-05 83 15
3/26/2024 1351 MW-27 58 .91 3/25/2024 921 TW4-21 74 .88 3/26/2024 910 DR-06 93 .93
3/26/2024 1253 MW-28 74 .03 3/25/2024 941 TW4-22 70 .64 3/26/2024 1323 DR-07 91 57
3/26/2024 1346 MW-29 105 ,94 3/26/2024 1227 TW4-23 77.50 3/26/2024 904 DR-08 51.45
3/26/2024 1343 MW-30 74 95 3/25/2024 937 TW4-24 71 38 3/26/2024 901 DR-09 86.50
3/26/2024 1243 MW-31 69.91 3/25/2024 926 TW4-25 72.01 3/26/2024 858 DR-10 78 .30
3/26/2024 1245 MW-32 83.61 3/26/2024 1223 TW4-26 75 93 3/26/2024 944 DR-11 97.81
3/26/2024 1320 MW-33 DRY 3/26/2024 1018 TW4-27 79.55 3/26/2024 941 DR-12 DRY
3/26/2024 1334 MW-34 106 82 3/26/2024 1003 TW4-28 50 17 3/26/2024 937 DR-13 69 .52
3/26/2024 1316 MW-35 111.88 3/26/2024 1020 TW4-29 80 .01 3/26/2024 847 DR-14 76 .05
3/26/2024 1319 MW-36 110.23 3/26/2024 1029 TW4-30 75 .54 3/26/2024 852 DR-15 92 68
3/26/2024 1336 MW-37 105.59 3/26/2024 1032 TW4-31 76.32 3/26/2024 843 DR-17 64.41
3/26/2024 808 MW-38 69 95 3/26/2024 1006 TW4-32 57 66 3/26/2024 830 DR-19 63 .21
3/26/2024 804 MW-39 64 ,00 3/26/2024 954 TW4-33 79 .85 3/26/2024 827 DR-20 55 ,56
3/26/2024 928 MW-40 79 32 3/26/2024 1036 TW4-34 78 .39 3/26/2024 820 DR-21 100.26
3/26/2024 1301 MW-41B 108 ,07 3/26/2024 1023 TW4-35 76.17 3/26/2024 836 DR-22 DRY
MW-26=TW4-15 3/26/2024 1012 TW4-36 59.40 3/26/2024 823 DR-23 70 ,35
MW-32=TW4-17 3/25/2024 946 TW4-37 68 .72 3/26/2024 834 DR-24 44 ,70
Comments: 3/26/2024 1210 TW4-38 61.62
3/25/2024 951 TW4-39 74.87
3/25/2024 1035 TW4-40 73.20
3/25/2024 1024 TW4-41 88 96
3/26/2024 950 TW4-42 72.12
3/26/2024 1026 TW4-43 73.54
Weekly Inspection Form
Date 1--a,-;,,y Name Dr:ca Irl~lhta~ -z;::;;4« 1/4/IJ'J
System Operation al<Jf no note
Time Well De pth* Comments anv oroblems/corrective actions)
IJ 'IOI. MW-4 ~ l;". ~ '1 Flow Lt. f) --No
Meter ~(J. u 1:2 nJ.. ,s ,. No
o~~, MW-26 ~ /., 0 -" Flow 1-:1. R :as-No
Meter 8 7 1 / 7 <:< ,r;--'k No
11nw !l TW4-19 -,,:a ~~ Flow 11 .n ~ f\Jo
Meter 'I 3 "l ~ /4 1, ~ l ~ No
oq~J;" TW4-4 ~'-Jfl Flow I I'... I) .... No
Meter -9.~"11:J 9,,0 .. No
rr,,; -2,. TWN-2 ~ ,;--, '1 n Flow I /,., IJ ,._ No
Meter ~ a./ qr ~:i. ~,;;, 1ll;s No
tJ~ If TW4-22 ""74 , L/1? Flow I I,. I]
,_ No
Meter , "'-:i. n r;-11 7 'lfiE No
lliliri I TW4-24 6$°/ qg Flow I c;', n 'liir No
Meter :.2 ~ 7 -:t q.qtJ 7-:r • No
/J7¥£/ TW4-25 .,~ ,-~~ Flow It;", I') 'Jl,g No
Meter , sr ifl 11 :i c:-c:l e; ~ .,_ No
nqJ&-1 TW4-1 lit~ • ..,, Flow ,~.JI 1115 No
Meter 1,,1 l,f Cf c;-q C/, 'I l!!III No
/) ~ e,.t; TW4-2 ~'il. l.n Flow It;., ll ... No
Meter r;-Ln/.,. ~t;"., :Sa. No
(}fit t-10 TW4-11 ~q. r.D Flow JI',._ n .. No
Meter 1 7 C:-t"Jt?, ~n -No
07_~{LJ TW4-21 -,t',.. /. 7 Flow I/,. I'} .. No
Meter ~r;-q1J2 1n,4~ ... No
,?c;t ~ I TW4-37 71,J'?. Flow ,~ n ..,_ No
Meter ~u,-J ,-~ ".l ~ 1lll!W; No
nA.'.ll'.. TW4-39 ..,,., . ~,,., Flow I«. D
,_ No
Meter , , I',,,~ '-1 &.f~ 1 ... No
nq1.1 j_ TW4-40 -, "J --.z, .2 Flow ,,a.n ,_ No
Meter , .2 q q /,. r.. o c. 7 '11!:s, No
oq~~ TW4-41 ~q.~&:' Flow /. '..l l!l!ls No
Meter 6-IG "r. r;-,1.: '-I~ tar No
Operational Problems (Please list well number):
Correct ive Action(s) Taken (Please list well number ): ----------------
• Depth is measured to the nearest 0.01 feet.
Time
OC\'Oto
091'"\
O?>fL~
090~
09 3 S::
ago,
092(,
092.;l,
09,,s:
0903
O'J .t;fS'
QS":fQ
IQ;t.'i
,aa.I
(QJ3
09:31
0138
0$':l I
os19
JIJ'f-:J.
073 .. /
ogu
o,3'1
o cao J
Q "7':C'::f.
oq3tJ
09':fl
102.1
Well
MW-4
TW4-1
TW4-2
TW4-3
TW4-4
TW4-5
TW4-6
TW4-7
TW4-8
TW4-9
TW4-10
TW4-11
TW4-12
TW4-13
TW4-14
MW-26
TW4-16
MW-32
TW4-18
TW4-19
TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
TW4-26
TW4-27
TW4-28
Depth*
s-s:: a'i:
·toa;, G-O
99,s;a,,
c;.e,. I 0
'8'.'i,3CA
73.50
)JQ.,~Lf
sa.1a
3S::Gf
11, ..;:;:
1Q,8Q
ie'j,'t4
!Z, 04=
5"1, gj
11,30
S<ed 4
:ts, 7S::
fS3,3S
1 'L, <,,4
J?,.3,0
71i". 43· I
7"t, '15°:
rt :z,;:
'455,9":I
7:2.. f:7
7 s::, ,;1
,,. at.
5'0, .'2.;2
Time
ag2,,4
075'3
091".l '
Q'itS:
0'10">
t211 IL
01$''6
O'IS:L
o, '1'2'
IQIO
,a o,
09£()
1030
09--IJ.l
1007
100':1
10(1
OS ci-\
agqs
asaa
09H.2.,
09 .«
a ct'f r
a,s:-r:
Well
TWN-1
TWN-2
TWN-3
TWN-4
TWN-7
TWN-18
MW-27
MW-30
MW-31
TW4-29
TW4-30
TW4-31
TW4-32
TW4-33
TW4-34
TW4-35
TW4-36
TW4-37
TW4-38
TW4-39
TW4-40
TW4-41
TW4-42
TW4-43
Depth*
11.11
f/5", ?,l
yy,37
(p'-(, I 1
1'1, JS:
1s:. as:::
,,,, 73
19,1£
7,;, 2,g
74,10
79,,'3
7S,t2S:
7$';9'2
S:9,10
7,el..QS'
"/. 33
--,a, '}(?
9'.9, I C\
71. <oB
Comments: (Please note the well number for any comments)
* Depth is measured to the nearest 0.01 feet
Weekly Inspection Form
Date 1..,2 _ zy Name,12c,a ,._.f( ~ 6',,Cf
System ol)efl ;onal (If no note
Time Well De pth* Comments an v o roblems/corrective actions)
1:J.07, MW-4 ~'l t !---I Flow L4 1 '11g No
Meter ":l" 1 3 -; 1 q '1-:. -----No '
1nc1r .. MW-26 .., ..,, '.2 "1 Flow 11('.~ 11111B No
Meter 'K ~ ,., 7 :\ "f'-g ... No
I "2, ,::;-() TW4-19 72. <H~ Flow I(,.. 0 1!15 No
Meter q~ o I ~5. -:2,11 -No
l~.:J.('" TW4-4 ~ t,. 0. .c;-Flow it. n 'lb No
Meter «t:~ ~ 1-r. :::1 ,_ No
oq.:,,:-TWN-2 l'l I. ':l "f Flow /{,, 0 ... No
Meter ~ ~ o· t 'Jo ~ 5' ... No
1 n q '-I I TW4-22 r.1. "~ Flow JI •. /J .!lls-No
Meter , D "3 , /l ., 7 -~ "5li; No
04"a.n TW4-24 /,.~ ~ ... Flow ,/'_ l'J ~ No
Meter ~~ill. 1> ., :J a .,_~ ills. No
Dcit~n TW4-25 t.,q ., 2 Flow it:;'_ n ..-is No
Meter , s. .1 /J ~ _l ~ ~ q 9& No ,~ ,~ TW4-1 q ,{f ., , Flow J :I. 0 ... No
Meter "'" oo '3 ff. -1. ... No
,n:1.., TW4-2 I n'it Cl"I Flow 116,n .. No
Meter ~ r M , " q ~ , ~ No
J01"1 TW4-11 s:c-'l . to Flow "-· n ... No
Meter 11~'1 ~ -r < .. No
IJqnq TW4-21 '11-/, 2{) Flow It. 0 1iE No
Meter ~ ~~ ~ ~ q'? ,_-i,q .. No
~q'-4 7 TW4-37 711 <~ Flow ,., . ~ W.-No . M~ter :J"/2fJ111n ~ ,_ No
nq ,:,: TW4-39 ..., ~ r. t:; Flow
'" fJ
._ No
Meter , , 1.cz,1e1.~ .s 1ii:I No
l::l.. '3-('.'° TW4-40 ~~-~« Flow IK,n ia..No
Meter ,-,.n "J.u IJ LI I.. e: 11a No
,~,a TW4-41 qq. 31 Flow I. a ... No
Meter LI 1 ... < ~s:t ::i ",'-I 1llils. No
Operational Problems (Please list well number):
Corrective Action(s) Taken (Please list well number): ----------------
.. Depth is measured to the nearest 0.01 feet.
Date
Weekly Inspection Form
Name 17e.,. 41un £,'
~tern Operational (If no note
Time Well De pth * Comments an v p roblems/corrective acti ons)
I-,. 1.4,... MW-4 CZ.2... «1' Flow . L/.n -No
Meter .,_ q ·g o 'I 11 1 I/ n 1!es No '
1 ~17 MW-26 'i{"t ~,; Flow Ir:;: /,. ... No
Meter ~ -, t... .;-'1 '3 q ... No
1u&.1< TW4-19 « ,:-., 1 Flow l~,f) .. No
Meter q l.f ~ ~ I fa , "-'1 .,.. No ,.
1'i b ~ TW4-4 t'J.l,J ~"1, Flow 11,,. n .... No
Meter ~<SJ~ 41 ~ ,_ No
n1..t:n TWN-2 ,c.1-~, Flow ', .. () --No
Meter ~ e:-, .:1 ~~. <2.., 115 No
1~/Hl TW4-22 1."i!. '1n Flow , r. n ... No
Meter , a-3 ~ /2 'it n t .. '!IE No
nt. r.-I . TW4-24 r .. t 7?. Flow //2.n ... No
Meter ~ ~,;ut, n-; r,~ ,. No
n1.u4 TW4-25 e,-,. ~7 Flow I I;', 0 ..... No
Meter , « ~ , • , . ., r. '1 i:;-.... No
I ~I;' I TW4-1 IDO . ()I.{ Flow J ~•I . • No
Meter ,.,~Ou~" , 1ia No
, ~ ~« TW4-2 QO ~C: Flow ,,,__ n .. No
Meter ~ ,. :J. "I "I {l , ... No
I ~~:l TW4-11 «Q ('g Flow , 1. r, ... No
Meter 1 -, -, ~ q . q t;' ,_ No
nt.~c:, TW4-21 7~ ~lJ Flow It:..~ llls No
Meter~ Lo~ 7'5',;", ¥ n ~ No
I~ I'! TW4-37 "14 I.ff?• Flow l'it (} '91s No
Meter ':l,.,, 11 '2--,-, .2. -; as No
t".\.:10 TW4-39 7"1 . (,,,~ Flow 11UJ .... No
Meter 1,-, ,q n1. ~ 1:118 No
I '-I I lJ TW4-40 -f"l, 10 Flow ,~ n '1111s No
Meter ,~o-S-'i"t.:q 1.1,, ... No
I 'I\ ,;-T TW4-41 4Q ,~ Flow ,,_ {} ~ No
Meter "l~r.,u.1 ~q 1li& No
Operational Problems (Please list well number):
Corrective Action(s) Taken (Please list well number):
* Depth is measured to the nearest 0.01 feet.
Weekly Inspection Form
Date
Name z::;kz~r=oC U.,~:f
slemOerational ;nnote
Time Well Deoth* Comments anv problems/corrective actions)
n9. ~7 MW-4 1':, q I Flow '-I (J =-No
Meter 3 SIR 94 :i 1 '33 .. No .
nR lff MW-26 "1fl q..., Flow I I;",~ 't. No
Meter ~ -r 'R--, 1.,4 c;-: c;" ... No
nq-1,.n TW4-19 "1-:t 11 Flow ,, .. I} --No
Meter qs-q '5 'flt., ~f. .. No
0'1,~i;' TW4-4 ~I,. t;"', Flow It. n .. No
Meter ~ ,;-q '-I 7 q. 3 WE No
07/./q TWN-2 ~, n~ Flow /~.D '9E. No
Meter .2 .er~.~ .1.. n~ ,._ No
OJ/JOI TW4-22 "'T n ll Flow If,. 0 WE No
Meter I n 1 <1. ~ tJ t. ..... No
011,r;' TW4-24 1.-« 'il.l.l Flow I{,., 0 .. No
Meter 2 ~ oi '1"' "1 q _ q 1,, '&:! No
0"1~ :1 TW4-25 ,.::,~,/SI: Flow /,1/, 17 ... No
Meter, t;t4-e;q,:;1.1J~ 1915 No
I} 9.,., ~ TW4-1 I IJ 9. , ,,.-Flow J ~ « .... No
Meter "It; r '-1. fJ n. 15" ,_ No
1
n~':1.t TW4-2 11n ~, Flow I l11, tJ .. No
Meter <la-,.~ lSL ~ ,.. No
IHl ~ c:' TW4-11 Qq ~t.. Flow ,<. '-'I ... No
Meter 1.., ~n 7 nn .. No
,073;" TW4-21 -,/,., 5"'0 Flow Ir,. -:1..__ _,_ No
Meter ?J ti, fJ q 7 '1 ,; J-1-4 ._ No
O'JO~ TW4-37 /. 'l( t..f () Flow J 9, () 111s No
Meter ~ ..,, L ~ \ (,. 1, '-I. -115 No
IHl I 2. TW4-39 -r"-1 I "'I Flow I '1l. l') ... No
Meter , , 7 1.1 l-4 t:1 .::. e; "'911; No
oqn~ TW4-40 ..,. ~ ._,..,_ Flow .~ 0 l!lts No
Meter i '\ n °' i;-q ., ~ .1. '9lri; No
OfAL/q TW4-41 ~q I 3"7 Flow 111 0 -No
Meter £.11,. -i, "1 \. t 1 .., No
Operational Problems {Please list well number):
Corrective Action(s) Taken (Please list well number):
,. Depth is measured to the nearest 0.01 feet.
Weekly Inspection Form
Date 1-?aP-a':I
System O perational (If no note
Time Well -Comments anv problems/corrective actions )
I ".I.\ (,. MW-4 Sl <. ~l) Flow ,., n ... No
Meter ~ 9 q c; .:;-.1 1 1 q .. No
I 2~n MW-26 "1C:.2?. Flow II. n '.tin No
Meter ~ 8 o 11 ~ • , 'Ills No
I~ 'l. I TW4-19 ..,~_ \1 Flow 1 ,h,n -No
Meter qr,.,. r,, 4 <. q S?. la No
J~~i::-TW4-4 ~, 17 Flow I~ n ... No
Meter ~ i; q 7 L/ I 7 ... No
I 2 ~.., TWN-2 'il I. .., .,,. Flow I {,.. n ' ..... No
Meter .:1c-,. 1.11 _..,i;-1-No
/'l-1._.c:"' TW4-22 l.'1. r,, I Flow it .. n -No
Meter ,,n '\ 7 .:1. 1 q , 4 'IE No
1!1 ~o TW4-24 (,.S< 'HJ Flow 1 t. (J .... No
Meter ~ &.J n ,._ t; °'r., ~S? "111115 No
I~ IQ TW4-25 /_q, II.( Flow l ;"' /,. 1k No
Meter , ~,;4 ::ui~,83 --No
I~~ !J TW4-1 ,n~ qn Flow ,~.t;J ~ No
Meter '-It:, r::-r; ~ ~ ,.. No
I ':l.fl q TW4-2 llfl:1T Flow ,~ n ...... No
Meter ~, .. LI n n Q .Q 111s No
,~n ~ TW4-11 Cf~.~:\ Flow J In IJ ~ No
Meter , .., ~ 7 :i i; 7 'k9 No
, '.l n q TW4-21 7L.. 'f~ Flow Ir.,. tJ ... No
Meter 3 <. I ' I .2. Cl. t. l .. No
1::u-10 TW4-37 /..fl ,;'R Flow ,~ 0 ~ No
M~ter ·H,.J -, , , 1-1 :, ... No
J'.l&.41; TW4-39 -,,~, ~q Flow Jfi! fl ... No
Meter 11 7-rff11.n ~ No
I '1 L,f ~ TW4-40 -,~ ':l~ Flow ,, Q 'as No
Meter , ~ 1 1 1 q i:. ~ 1 ... No
l':l':ll\ TW4-41 s:r~ I I Flow In () "111M No
-Meter u ,. al./,:;'"' "~ ... No
Operational Problems (Please list well number):
Corrective Action(s) Taken (Please list well number):
* Depth is measured to the nearest 0.01 feet.
Weekly Inspection Form
Date Name Ou o r~ ly m7. :z:;;;..,,c H, 4!: ~v
vstem Op eration:; no note
Time Well De pth* Comments an v o roblems/correctlve actions )
n«~r; MW-4 ~':t /(. Flow .. , • /'J .. No
Meter ~ q n :z__-,,. , 1 • -, -2,
,_ No
n« ,~ MW-26 '7 {. 1.1 Flow I,:', g ,,_ No
Meter t:4 ~, '-' q , '-1 ~ No
/0 I~ TW4-19 ""'"' r~ Flow It~ n ,_ No
Meter q 7 &f ~ -1 ,.. , 1 o --No
f1g~J TW4-4 q~ '1,;'° Flow I l..D 'Ills No
Meter 9..~o 2 ~ 2,. r; ,... No
0 7 '5 :J. TWN-2 s;i:--.. A~ Flow II'. n ._ No
Met er .2 .~4 7 t~. 1-q -No
OSU')"2, TW4-22 /'_ "7 " "'1 Flow I I .. n 111111 No
Meter , n ~ q /_ ~ 7 l'J ... No
0 .,~fl TW4-24 /_q 4-:t. Flow JI. f) .. No
Meter ~ "" , o I D 2 • T ~ 'fill;-No
o-r",; TW4-25 /,.q --,,t? Flow ,~ ,;z ~ No
Meter 1,01.. '12-1.H_ t:',e;--• No
"'(J. '-I IJ TW4-1 t I) I. '\ Cl Flow I '::I.~ "!!a No
Meter 4,r-.% -,. L4 a !I. -No
O'l -14 TW4-2 qq. "{"{ Flow Jt ... "l. Wis No
Meter ,; 1. '-' ~ n , . n ,_ No
nsr1.'1 TW4-11 S{,a ~ '.l Flow I ~.n ... No
Meter ,-9. n 1 .. ,_,, ~ 7 ,.. No
n -r 1q TW4-21 ~(".I~ Flow JI'. n • No
Meter -;1..1 :12qa,. '.1 ,2 -~ No
/J'.i fJ f( TW4-37 /.0. {A ~ Flow / SI n 1M. No
~ Meter 2-"'l -r"i 'I~ 7 "' .. No
O if 13 TW4-39 "1'-4 ~7, Flow ,~-n • No
Meter , , -, q ~ ~, . 1 '!IIC No
IH~~q TW4-40 1'1 ~~~ Flow J~ /) 111s No
Meter , ~ , ,r-1 -r "1 . .., -r 'e. No
;?'It, ,u. TW4-41 «q 11 Flow ~ 0 ... No
Meter "" , . q ~ ~ ~ . < ~ "l=I No
Op erational Pro blems {Please list well number):
Corrective Action(s) Taken (Please list well number):
* Depth is measured to the nearest 0.01 feet.
Weekly Inspection Form
Date Name Oua & IJc,na,, -C,,n,c:: Hnt04<
Svs tem O perational (If no note
Time Well De oth* Comments an v oroblems/corrective actions )
11n 1. MW-4 ~"1., I~ Flow t,{~ 1il5 No
Meter ':l Q 1> 2 Id '=l , 7 ., 1116 Nof '
II 1o1 C\ MW-26 SU I\ Flow IC'~ ... No
Meter "Q :{ 7,; :J . q ~ No
I"\ C. 0 TW4-19 ,~ tJ¥ Flow I /A.() ...__ No
Meter Q ~ ~ , ,. 1 I~ ... No
, '.l 1 .£.I TW4-4 Ql;" ,;,,._ Flow I/. ('I '1is No
Meter~ ,.n 7 n <.::, • No
,n, ,_ TWN-2 sv: 7/J Flow 1 "-. '.2 .. No
Meter~ <'l:"7Qq. "in 91s No
1111S? TW4-22 t:..., 3~ Flow tl n .-.e No
Meter , n "' /) L/ ,. ; "' .. No
,n.,~ TW4-24 ,_Q 1-:f Flow I I'. I) .... No
Meter ,, "4 , < ~, 'T 2 q -No
Jn/ fl TW4-25 "· sr ~ :i Flow ,...,., ais No
Meter ,ru. q K" qq _, o ~ No
1"11:l TW4-1 /f)K"fl Flow I 2. Q. ... No
Meter "' ~ ~ 1 ~ q er .,_ No
I :l. n I TW4-2 1n~ n~ Flow JI'.... /l l!!ls No
Meter ~/~~~ ~ 1. G. 1111s No
11 c::'<' TW4-11 SHl q C:: Flow I I'. fl las No
Meter 1 ~ 1 ~ 7 J 7 111s No \
1/)/l:J. TW4-21 7t!.,"7..~ Flow I ( •. ll ~ No
Meter 3t.~ 71. g.., n~ 'We No
ID1~ TW4-37 -f I 1.11 Flow I "'f «. ,.._ No
~ Meter ~" 7 'T JJ, 7. 11 -.., No
lll&-1 l TW4-39 -, "4 C: .2 Flow J ~ () .. No
Meter 1 , ,;r "l. 7 n n _ 1-1 '1116._ No
I 2. -:Z..'.J TW4-40 -, ~ . Yi 5"'"' Flow J~ r, ~ No
Meter , ~, -rq -,-, :i c.,1 .... No
I .:.t I 7 TW4-41 f!, q '3 Lf Flow ~ /) ... No
Meter u 7f'J, < 1 , fl '5 No
Operational Problems (Please list well number):
Corrective Action(s) Taken (Please list well number): ----------------
* Depth is measured to the nearest 0.01 feet.
Weekly Inspection Form
Date Name a::::z.. '7""• C...-4
System Operational lit no note
Time Well De Dth* Comments anv oroblems/correctlve actions)
09tt:IJ MW-4 '1.c'.JI. Flow ~ /) '9le No
Meter --,. q 1 t. ?11 q. q .:1 lil8 No .
l ncz~n MW-26 '1t:" ~~ Flow I<". tit 1118 No
Meter ~frl;"/41~., ~ No
,n 2 r_ TW4-19 "'1"'-,~ Flow I/_ /1 ... No
Meter qq, ~n~n"T ... No
oq,o TW4-4 Jlq e:1 Flow I /_ l'I 91&-No
Meter ~ t .. 1 ~ r ~ c; -No
I~~ I TWN-2 "T~. "l~ Flow 11' ... 'J "lk No
Meter 1 <' /. R 1-'I/ " 7 =as_ No
,~·l/ct TW4-22 q 1 <t: Flow 1«::'4: ... No
Meter 1ru-, ".J, ~<-~ .... No
l~Lf l TW4-24 71 It;"' Flow 11. n .-..No
Meter ., .., ., , -, ~, /'J~ ~No
J"'J.nR TW4-25 ~"I.I,// Flow It::'. '-'I .. No
Meter , 'il ., -, st. ,. '-_ < 1.. • No
'II( /HtS-/. TW4-1 I rJ L:". l"J I Flow ,,, q as No
Meter 4 t:" ~ .., c: ~ , ... No
I')~ J.11./ TW4-2 Q C!t ~ Q" Flow /.t;. « Ws No
Meter ~/4/. L:"t:'~ _? .... No
IH~~t .. TW4-11 it~. I\ Flow , I'.../] ,.. No
Meter , Q. 'l ,.,-11 ? Lt .... No
f 'l c"~ TW4-21 1..7,.,,2,; Flow //.. ~ 1119 No
Meter ~ l -~ . .-~ q q q n I. ilE-No
J '2,l;'" 7 TW4-37 c:p, ~"' Flow -'i'l /) 'IE No
Meter ~ •·HU n '-~ . .J. .,_ No
I '-1 l'JI. TW4-39 ,.q ~u, Flow I~ f1 41s No
Meter , , ~ 4 -t , () ~ 1!1118 No
17q1sr TW4-40 -rt:1 &,(J.{ Flow IQ n ... No
Meter , ~ 1 , ~ ,u.. 1.1 1. ,_ No
l /10/l ~ TW4-41 ~q C1.:l Flow /.. /] ,_ No
Meter "" -, , ~ '1 ~ '.11..1
,_ No
Operational Problems (Please list well number):
Corrective Action(s) Taken (Please list well number): _______________ _
* Depth is measured to the nearest 0.01 feet.
Weekly Inspection Form
Date a,-.2i .. 2..'f _N_a_m_e_;Z/4......,""'~"""'asw...&-z-1/~rn"'"Wl-...<-------------
s ystem Operational (If no note
Time Well De pth* Comments an v PTOblems/correctlve actions)
t')Q~.., MW-4 ql./_:l".l Flow '-1.11 'IE No
Meter ~q j__l'f'-/ :11.. ~n -No
i'Jq~1 MW-26 "ifO 3q Flow If. .2. 1t:E No
Meter ~ « 1 1 ~ o. i.t ... No
ln'-lz;' TW4-19 "1t./ ~q Flow } I. ,n 11111. No
Meter , fl n n q 1 ~ ~o ~ No
I" 14 TW4-4 ~« ~~ Flow ,~ 0 ~ No
Meter ,11. I~ ~, r. ..... No
Of I :J. TWN-2 c.r..t:: 9.J Flow f/;..,, • No
Meter -2~91~q,qSf ... No
b~~..,_ TW4-22 t.O ~ I Flow I ,:; 1l ... No
Meter i o J.{ l>f ~ , ~ 1. .. No
no,~ TW4-24 ,t. 1/) Flow 11. 11 .. No
Meter .1 ... , ~ g , ,_ . -r ~ .. No
[)tf n ,_ TW4-25 -,n.,o Flow Ii:"~ '1 ... No
Meter , ~"., n ~ "1. 11 --No
mn,. TW4-1 I n it'. "1 lf Flow I :J. • 1' --No
Meter ,_,. ~ "/ ,;" i;-~ o .. No
n~,,,r; TW4-2 JI n. :i,;-" Flow , ... 'f] • No
Meter ~t. 7'-4.,-. '.l 111115 No
f)(f,., lJ TW4-11 c:tQ I ""f Flow 't. {) .. No
Meter , st ~ ~ ~ , .. n ... No
O "t!f ol'J TW4-21 '7"1 ,'-10 Flow JI'.. i'J "--No
Meter ~t..'1 o 11. <'I. if« ,_ No
l)Q~Q TW4-37 ~~ "H Flow /~ n .... No
Meter ~-'1 it r; 2 ~ , '-1!16 No
nc,~4 TW4-39 ~...,.,.,' Flow J«. n 11118 No
Meter !l o .2 ~ -, :1. '111g No
1n:1? TW4-40 ""1'.:!. . .,., Flow I ill t, ~ No
Meter ,.~2'-!~11-,_q?, '1111 No
Jnl}Q TW4-41 SCCl 1 :l Flow ,.._ I) ... No
Meter ~-, :z ,._ ~, "'""' ... No
Operational Problems (Please list well number):
'
Corrective Action(s) Taken (Please list well number): Ml• I I T4 t t./ .-:3 q hos Ac .,,.wJ1 0 w ovfu:
* Depth is measured to the nearest 0.01 feet.
I
(
Monthly Depth Check Form
Date &-,c,;-1&'i Namsv,,.«rr&-'7<d2'.>11'
Time Well Depth* Time Well Depth*
12.S: 3 MW-4 ,~.30 lCU3 TWN-1 ll,~~
J 2.~! TW4-1 9'1,S:t ,01~ TWN-2 s1i1w
i .... , ~ TW4-2 ~~-~~ a9sa TWN-3 "l2A ()(}_
l a.113 TW4-3 ,,.31 Q9~i TWN-4 ,~.~t.
llll~ TW4-4 is s:-, ,a asii TWN-7 z~. ~!
t:i.i, TW4-5 13.15: Q~~3 TWN-18 '' ,3'2
r.HJ1 TW4-6 sa,as aga,.3 MW-27 5:!l,3 8
l a!:l I TW4-7 ~.a .«I'S! 100s: MW-30 Is:'.~3
I :1 3 ::Z TW4-8 ii'.:6~ tel11 MW-31 ~!l.~S
I 2.2' TW4-9 11.t~
L2.liV TW4-10 11.Q~
i2."'I~ TW4-11 sg • ll
asoQ TW4-12 s.z.. a~
az2..1 TW4-13 ta.,.2a a1~:1 TW4-29 1'1.,,. 'i.
Q1~0. TW4-14 7.I, "l 1 1338 TW4-30 '1~'17._
l02.f. MW-26 9'.3,ll 13~a TW4-31 1~ • .2.z
UilQS TW4-16 1t/~!1. aa:as TW4-32 ~1-~3
La r 3 MW-32 ~ 3,S:S l :3 as:: TW4-33 '1..2,11a
Laai TW4-18 1~,88 Q1~3 I TW4-34 18,aJI
t.2830 TW4-19 :I 6 I ?tS::: 13!:tl TW4-35 1'1., lD.
, 03 I TW4-21 '1_~ I .a.a n..75:.3 TW4-36 b!ri£f.~
'Q "''"'
TW4-22 Z/1.' ~-, fl2'1S TW4-37 73,9:!r '
13[3 TW4-23 11.~~ J1,.2..9 TW4-38 ",5'8.
'0.!1. Q TW4-24 (o~ .~, l'Q~.& TW4-39 'Z~,l~ ..
UJ.32.. TW4-25 <.9:. S.Q J318 TW4-40 1.a.~2
13[Q TW4-26 1<-aa. 1301 TW4-41 ~~.3{.
13.as TW4-27 zg.~(! 11.iZ.I TW4-42 j__,;1..,QQ
Qfo"( TW4-28 ~Q,16 133 S:: TW4-43 ):3,lfS
Comments: (Please note the well number for any comments)
* Depth is measured to the nearest 0.01 feet
Weekly Inspection Form
Date 3 -S:-•T • Name ~~~ 7;:";q,:;c tft,IC~
System O perational {If no note
Time Well De pth* Comments anv p roblems/corrective actions)
no~1 MW-4 ~1 . 31 Flow sf n '-No
Meter -3 q ~ o 7-a:( o ... ~ L .,_ No '
OQ07 MW-26 ~t... fl'i? Flow I$', t. • No
Meter ..g~q'"' ~~ -, -No
OCI',"( TW4-19 '7-;J ei-,;-Flow , ,;-: ~ • No
Meter , no 11 r,~, "I 'f 11111s No
OCl."3~ TW4-4 ~q (() Flow ,~ n '!ta No
Meter ~~ '2'1. '11 '1 .. No
09'1"-TWN-2 /-3 1'1 Flow I/;, • ('J -No
Meter 2.~q3no.11 .. No
·O~C~ TW4-22 r.;. q /_ ,;--Flow I/_,/') ltE No
Meter JtJ""l~77I I} .. No
O~"l'il' TW4-24 ~I, 1~ Flow , t. n . ,_ No
Meter ..11.f~~~...,,.~~ ... No
l:){J 'J., TW4-25 t.4 nt:1 Flow Ir:'. I.. ,_ No
Meter , "1 q ,; n '"'~ q 7 .... No
oq~,-TW4-1 ,q4l,DQ Flow J "1 ~ ... No
Meter u ~,.., q 1.1 1 ~ No
O'tI7 TW4-2 QT '-/fJ Flow J&. :J ... No
Meter ~ ~ 9, , 11 ~ .... No
.()C/J ~ TW4-11 ~q. 1,;-Flow l.l~ t1 .. No
Meter , <Q. ~..,, "''
,_ No
t? g-:i~ TW4-21 7<. '2..r Flow ,,1;,. n ,_ No
Meter ~ t. "1 -, I 7 lL I ll 'Wlls . No
I/SF•· TW4-37 I./_ ...... Flow I <;I 0 "1M No
Meter 2"l«ta1~~-1 .lMil.. No
OltO.:l. TW4-39 ,,., -~~ Flow Jg-IJ ..._ No
Meter 1..1 o~t. q ~ '!!Is No
oqt,,1.t;"" TW4-40 ..,~ ~"2 Flow t'rl,D 1115 No
Meter , ~ 1. "11.-f Ii:---rq ... No
Of/~,,_ TW4-41 is.'1"l Flow ~o • No
Meter ..,--r -i, D q ~ . 'T1\ ,_ No
Operational Problems (Please list well number):
Corrective Action(s) Taken (Please list well number):
* Depth is measured to the nearest 0.01 feet.
Weekly Inspection Form
Date 3-(1-,2,'1
System Operati nal (If no note
Time Well De pth* Comments an v problems/corrective actions )
oq-;1 MW-4 ~I.~~ Flow 1--1 .-n '111M No
Meter "\ q 'H .. 7 1 ~ "1 :J. ,.,. No '
oq1LI MW-26 ~"'t IA l Flow ,<. ~ ... No
Meter cqnSl77 ~ ... No
11~7 TW4-19 -,2 -~, Flow ,,. /I Ille No
Meter , ll , a.t "T .i;-q :,.L ,_. No
nQll"I TW4-4 c;i('.1a, Flow I i:'. r:,. ... No
Meter -« t.. 1 r. t ,ft _r1 .... No
osoq TWN-2 ~6'(.~-~ Flow I I. /'J .. No
Meter ~ ,. o ~~I;'.~ 1 ~ No
O'i 'I-, TW4-22 7'L r3 Flow ,c:: ~ -No
Meter , o>--1-r, 'ii ::i. n ..... No
o~~,i TW4-24 jl,/9, Flow I c;'. I. ... No
Meter 2 ..., -,,, , q e, 2 ~ ~ ... No
O"tlft4 TW4-25 "1 :2. :JI./ Flow J7:-:-..tJ ,,.,_ n .. No
Meter , ._,, ~ n "3 .., -,.. q ~ No
()q~f} TW4-1 rnc.-rC Flow t 2 , Sf ... No
Meter ~ r:r::,:., 2. ~ ..... No
I-tl ~"2.c" TW4-2 HO .Of• Flow I/;. {) ... No
Meter ,c--..: -.;r -H 1 "T. " ... No
O'i"'tt'I TW4-11 QCl 1l "t Flow ti. D ... No
Meter , v .. , n fl Iii"~ ... No
n-,,:;, TW4-21 ..,.., -..:"'t Flow n: .. n .. No
Meter ·7.1,. ~ ..:1c '3 ~ 1 o ~ 1IIE No
()(Jl.11.1 TW4-37 ~7.7< Flow l'l .lJ ... No
M~ter ~ "" Q , ,,, '"' ,_ ::z. .... No
nqtJq TW4-39 -r'-1 '-I'-"{ Flow l"T, « 11111 No
Meter t., ,~,., .,. 2 ... No
n4C"'~ TW4-40 -r2. /.a Flow I <a,ll ~ No
Meter ,~~onq-, .,., .. No
/Jct "4 I' .. TW4-41 aa. .':'fl Flow £.. 0 .... No
Meter w1 ~ ~ -, 1 1 .. 1. ,._ No
Operational Problems (Please list well number):
Corrective Action(s) Taken (Please list well number): ________________ _
.. Depth is measured to the nearest 0.01 feet.
Of.30
Date 3/:z..0/.,1.o~i,
Time Well De oth*
0'61~ MW-4 g3.1~
0'755 MW-26 gy _q7
OCitO TW4-19 "13 .J..J
"Jb:l::, TW4-4 ~c...l I
07U::, TWN-2 1'7.~D
1013.7 TW4-22 lJ..11
073A TW4-24 7~_1..,r.,
tY7!ll> TW4-25 1:l.'I\
Oi~~ TW4-1 10\ .L\b
0~'.1~
ogog TW4-2 \03,17
080~ TW4-11 IC10,lt.
0715 TW4-21 7"-S$(
07"'1~ TW4-37 & ,,g'i
01~'! TW4-39 ,5 .;:;. .,
OiN, TW4-40 73 ,Xb
~ TW4-41 Rft. ,;';l
Weekly Inspection Form
Name --t;.f\Wl~f'" Holl;J~u
Comments
Flow 4.D
Meter :119'{"~'-'-.cc:.
Flow lb .0
Meter g9 300 I .~
Flow 1(..,0
Meter I o 15 \ 'TY . .1 t-.
Flow l~.5
Meter S 6 ':!:> 1'~ I. 0
Flow IC:,.O
Meter .:i,.bl 7 78. bl
Flow lb.0
Meter ID4 'I~~ ~.Y
Flow 15.5
Meter ;>..YY .2 t;3(,,, 7!<.
Flow l~.D
Meter 19 IA65 0 .iS
Flow 1~-0
Meter L\Sb~0'=,."1
Flow lb,D
Meter !:>'-'fg'J~.t\
Flow \C.,D
Meter-}g_i; lODS
Flow H.-0
Meter :H, '-O~bf. I(.
Flow 15<'. 0
Meter 14q5Lf C')s;:;_'i{
Flow ISCO
Meter q 11.291.
Flow IK ,O
Meter 133""-9.~L 77
Flow '-,D
Meter 411../9 8G!.5~
System O perational (If no note
an v p roblems/corrective actions )
(Yes)No
( Yes ')No '
-
~ No
(Yes \ No
r-: ~No
C (es.JNo
ct.esAo
Yes) No
(.Yes.JNo
( Yes) No
(Yes )No
C YesJNo
Yes )No
( Yes _}Jo
<Yes) No
( Yes\ No
( Yes ~o
(Yes 1No -~ ~~ .)-Jo
Tes ;Jo
(Yes..;No
( Yes') No
-
(Yes) No
( Yes) No -(Yes .J,Jo
,~o
{ _Xe.s_ JJo
( Yes.JNo
~No
( Yes! No
c..:t.es }Jo
( Yes ')No
Operational Problems (Please list well number):
Corrective Action(s) Taken (Please list well number): ______________ _
* Depth is measured to the nearest 0.01 feet.
Date 3;;J.S/2Q.2.~
Weekly Inspection Form
Name ~n1'U Uoll,'c:kj
System O perational (If no note
Time Well De oth* Comments an v n roblems /r.nrrective actions l -
10 1:i... MW-4 f<1 l..\'1 Flow L\.() ( Ye s~o
Meter 3'15 l C>~ .:}..~ ( TBS ,No
'--=
D'!S, MW-26 ~~-~; Flow IC:i. (} rYPs. l>J o
Meter ><Gt «-1"7.r ..... q .c... ( ~:No
10 ~0 TW4-19 73,<fK Flow lb.O {""Y-es l No
Meter 1n,111-:J . OS f 'res)No
I 01, q TW4-4 g')_ ~" Flow 15,5 /'YA_, J\J o
Meter 5< C,. '<-J:"... I J<', 7 ( Yes ~o
0 Cf 31 TWN-2 S<l.l'\ Flow ll:..O 1 ~es )No
Meter ;1..bc?.5I7. L.f'-1 ( Yes )No
" D1'tl TW4-22 70. <o'-t Flow lb.O {Y~o
Meter lO~O~.S("":>.~ /Yes D.Jo
l --
C)q37 TW4-24 -,, '\S< Flow lS .t:. ,---Ye s ~o
Meter ,2. '-I'¾ 54 1'1 . '-~ TYes "l No
'--__,
oq j,b TW4-25 72 .0l Flow I4 .D ( Yes)No
Meter I q I ~ Y 11 . 7 '-r--v-es N o
1m~ TW4-1 wo.t--i:.. Flow \1 0 C V'Pc: ~o
Meter 4i C.G,C... 41 . Y ( Yes ~o
~ ~
IMY1 TW4-2 10::2...~b Flow lb() ~s "No
Meter s, 04 \ f< L (Y es "W o
~
100a. TW4-11 9() o, Flow \'--0 ~No
Meter !Kt 7K .;t:Z ( Y e-s -1-.J o -
OGf!l l TW4-21 7"1.~x' Flow lt..D tYe"s:\No
Meter 3~'-~"1,;2..0 . 7t (~No
I O'f 'il, TW4-37 (...5( .11. Flow IS'.0 /Yes_ "No
Meter ;2.LJ~nq C..7 l ~No
OfSI TW4-39 74,'"t;"I Flow IK.0 1 Ye s lJo
Meter \OgL{q,.SO /Yes:JN o
\035 TW4-40 -,3.10 Flow nLO r'~s 'iN o
Meter ,,~Lt'\5"-~Cf ( / c__;:i_ 1'I 0
10:lL/ TW4-41 5(5(, -,c., Flow b.0 (V,,.,,.. ~0
Meter 415i::... 1.4. l"'?.. ( Yes )No
Operational Problems (Please list well number):
Corrective Action(s) Taken (Please list well number): ---------------
* Depth is measured to the nearest 0.01 feet.
l!o\)\
~
MW-418
'9-5510
TW4-43
~552 3
estimated dry area
perched monitoring well installed April,
2023 showing elevation in feet amsl
temporary perched monit oring
well inst alled September. 2021
showing el evation In feet amsl
TWN-20 temporary perched nitrate monitoring
IJ5554 well installed April, 2021 showing
elevation in feet amsl
TW4-42 temporary perched monitoring well
¢ 5523 installed April, 2019 showing
elevation in feet amsl
M;-~505 perched monitoring well showing
elevation in feet amsl
TW4-12 0 5567 temporary perched monitoring well
showing elevation in feet amsl
TWN-7 . . .
<>55 70 temporary perched nitrate monitoring
well showing elevation in feet amsl
PIEZ-1 perched piezometer showing
i.i 5588 elevation in feet amsl
RUIN SPRING b 5380 seep or spring showing
elevation in feet amsl
DR-10 DR-11 .
b4B2
.
54:J8
\
'
rfl
1 mile
' '
• ' \ ' \ \
\ \
\
' ... '
ab.:Jnio11lcU
TWN-15
.... •~.-.!
a
nb □nio ncd
TWN-11
•111 r\.
5605
0
lWN-16
TWN,12.
'~o
--,-~.-•~;;a
~~
' / LlfZ.0 1 . . _
ci twu•r d I 5~8 .,-. ~ -Lr -;;
lWN-OII MIN-1ll-
/ ---
-:
e
TWN~,
S: MW-4, MW-26, 1W4-1, 1W4-2, TW4-4 , 1W4-11 , TW4-19, TW4•21, TW4.J7, TW4-39, TW4-40 and TW4-41 are chloroform pumping wens;
TW4-22 , TW4-24, TW4-25 and TWN-2 are nitrate pumping wells; TW4-11 water level is below the base of the Burro Canyon Formation
HY □R □
GE □
CHEM, INC.
KRIGED 1st QUARTER, 2024 WATER LEVELS
WHITE MESA SITE
APPROVED DATE REFERENCE
H :/718000/may24/WL/Uwl0324.srf
FIGUC-1
"' estimated nitrate capture zone boundary
, stream tube resulting from pumping , (note:
J" combined capture shown for TW4-22 and
I TW4-24; and for TWN-2 and TW4-25)
©
MW-41B
-¢-5510
estimated chloroform capture zone boundary
stream tubes resulting from pumping , (note:
combined capture shown for MW-4, TW4-1,
TW4-2, TW4-4, TW4-11, TW4-40 and TW4-41 ;
and for MW-26, TW4-19, TW4-21, TW4-37
andTW4-39)
estimated dry area
perched monitoring well installed April,
2023 showing elevation in feet amsl
TW4-4 3 temporary perched monitoring
~5523 well installed September, 2021
showing elevation in feet amsl
TWN-20 temporary perched nitrate monitoring
IJ5564 well installed April, 2021 showing
elevation in feet amsl
TW4-42 temporary perched monitoring well
¢ 5523 installed April, 2019 showing
elevation in feet amsl
MW-5
.5505
I I TW4-12
• 0556 7
perched monitoring well showing
elevation in feet amsl
temporary perched monitoring well
showing elevation in feet amsl
TWN-7 h d . . . .A.65 70 temporary perc e nitrate morntonng
V well showing elevation in feet amsl
PIEZ-1 perched piezometer showing
~ 55 88 el eva lian in feet amsl
RUIN SPRING
b 5380 seep or spring showing
elevation in feet amsl
DR-10 .
5482
DR-11 .
5488
'
it
1 mile
\ ' \
' \ ' ' ...
' .... -~
c1b.:it1if1ed
TWN-08
I
--
clbJ.n iunl'd
TWN-15
t5~
~-
I s's
MIIV-1!1-
--
-
ab:::nioned
TWN-11
-
•~:
TWr,!.;1l
~~-i,,; ~--~ ___.... ........,;.~,;.:.;;;-~~~-14¥. ~:....i..
NOTES: MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-11, TW4-19, TW4-21, TW4,37, TW4.39, lW4-40 and lW4-41 are ch.lorqfo r m pumping well1,;
TW4-22, TW4-24, TW4-25 and TWN-2 are nitrate pumping wells; TW4-11 water level is below the base of the Burro Canyon Formation
HY □R □
GE □
CHEM, INC.
KRIGED 1st QUARTER, 2024 WATER LEVELS
AND ESTIMATED CAPTURE ZONES
WHITE MESA SITE
A PPROVE D DAT E REFERENCE FIGURE
:',
H:/718000/may24/WL/Uwl0324NTcz2 .srf I C-2
,,:, ""' estimated nitrate capture zone boundary
,f' stream tube resulting from pumping . (note:
g combined capture shown for TW4-22 and
TW4-24; and for TWN-2 and TW4-25)
TW4-43
~5523
TW4-42
◊552 3
MW-25
.5530
1W4-7
0 5538
PIEZ-2
Q 5581
estimated chloroform capture zone boundary
stream tubes resulting from pumping . (note:
combined capture shown for MW-4, TW4-1,
TW4-2, TW4-4, TW4-11, TW4-40 and TW4-41 ;
and for MW-26, TW4-19, TW4-21, TW4-37
andTW4-39)
temporary perched monitoring well
installed September, 2021 showing
elevation in feet amsl
temporary perched monitoring well
installed April, 2019 showing
elevation in feet amsl
perched monitoring well showing
elevation in feet amsl
temporary perched monitoring well
showing elevation in feet amsl
perched piezometer showing
elevation in feet amsl
... ... .... ....
' ' ' \
\
-25 ~ I
~·----\ -r--.
x r------. 1
-,:,
•,
(I .,
I
I ,
\
'
' '
,,
'\
~
'
5525
•
'66'6\'J
5601 .5
5555
_.. ,... --
(I:,
~<\(· . 0 ~~ • '6~'3..
5'6
5540
5535
5532..s
:• 5530
:-~~5
~552 3'"' ,~5-~s
• .;J~ ,1 ~'S
I,.< •.
NOTES: MW-4, MW-26, 1W4-1, 1W4-2, 1W4-4, 1W4-11, 1W4-19, 1W4-21, 1W4-37, TW4-39, TW4-40 and TW4-41 are chloroform pumping wells :
TW4-22, TW4-24, 1W4-25 and TWN-2 are nitrate pumping wells; TW4-11 water level is below the base of the Burro Canyon Formation
HY □R □
GE □
CHEM, INC.
APPROVED
KRIGED 1st QUARTER, 2024 WATER LEVELS
AND ESTIMATED CAPTURE ZONES
WHITE MESA SITE
detail ma
DATE REFERENCE A GURE
H:/718000/may24/WL/Uw0324NTcz.srf I C-3
TabD
Kriged Previous Quarter Groundwater Contour Map
@
MW-41B
"9-5509
TW4-43
~5524
estimated dry area
perched monitoring well installed April ,
2023 showing elevation in feet amsl
temporary perched monitoring
well installed September, 2021
showing elevation in feet amsl
TWN-20 temporary perched nitrate monitoring
1]5554 well installed April, 2021showing
elevation in feet amsl
TW4-42 temporary perched monitoring well
¢5523 installed April , 2019 showing
elevation in feet amsl
MW-S h d ·1 • II h • • 5504 perc e morn onng we s owing
el evation in feet amsl
TW4-12 . . 0 556 7 temporary perched morntonng well
showing elevation in feet amsl
TWN-7 h d . . . A.5569 temporary perc e nitrate monitoring
V well showing elevation in feet amsl
PIEZ-1 pe r ched piezometer showing
-1 55 37 elevation in feet amsl
RUIN SPRING b 5380 seep or spring showing
elevation in feet amsl
\
\
\
\
DR-10 DR-11 . .
5482 5487
5480
........ .....
~
1 mile
-
;:ib.~na,o ned
TWN-11
a !>4ntined
\ ' TWN-15
' ' .... ....
' .'.lbana,llriQ Cd
..._ -l'WtMO :\.~
, •~dnee1
~, r,'1tl",og
TWN i "'' ....
PIEZ-01
5 ij7
MW-19 --
COR
atNnr ~ ,wu:12 ~ •
l'WN ,.
'
5400
' ; -~ JJo
R~.SP,
NOTES: MW-4, MW-26, TW4"1, TW4-2, TW4-4, TW4-11, TW4-19, TW4-21, TW4-37, TW4-39, TW4-40 and TW4-41 are chloroform pumping wells;
TW4-22 , TW4-24, TW4-25 and TWN-2 are nitrate pumping wells ; TW4-1 , TW4-2 and TW4-11 water levels are below the base of the Burro Canyon Formation
HYDRO
GED
CHEM. INC.
KRIGED 4th QUARTER, 2023 WATER LEVELS
WHITE MESA SITE
A PPRO VED DATE REFEREN CE
H:/718000/feb24/WL/Uwl1223.srf
FIGURE
0-1
TabE
Hydrographs of Groundwater Elevations over Time for Nitrate Monitoring Wells
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09/22/17
-06/18/20
03/15/23
L..-__ .__ __ ,__ __ ,__ _ ____. __ ____. __ ____. __ ____. __ _._ __ ~ 12/09/25
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00
Tab F
Depths to Groundwater and Elevations over Time for Nitrate Monitoring Wells
Water Levels and Data over Time
White Mesa Mill-Well TWN-1
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,646.96 5,648.09 1.13 l06.13
5,600.38 02/06/09 47.71 46.58
5,599.99 07/21/09 48.IO 46 .97
5,600.26 09 /21/09 47.83 46.70
5,601.10 l0/28/09 46.99 45.86
5,602.59 12/14/09 45.50 44.37
5,600.55 03/11/IO 47.54 46.41
5,600.66 05/11/IO 47.43 46.30
5,599.18 09/29/10 48.91 47.78
5,598.92 12/21/IO 49.17 48.04
5,598.29 02/28/11 49.80 48.67
5,597.80 06/21/11 50.29 49 .16
5,597.32 09/20/11 50.77 49.64
5,597.15 12/21/11 50.94 49.81
5,596.54 03/27/12 51.55 50.42
5,596.52 06/28/12 51.57 50.44
5,595.03 09/27/12 53.06 51.93
5,596.62 12/28/12 51.47 50.34
5,593.54 03/28/13 54.55 53.42
5,592.38 06/27/13 55.71 54.58
5,591.65 09/27/13 56.44 55.31
5,590.34 12/20/13 57.75 56.62
5,590.03 03/27/14 58.06 56.93
5,589.09 06/25/14 59.00 57.87
5,588.15 09/25/14 59.94 58.81
5,587.74 12/17/14 60.35 59.22
5,587.09 03/26/15 61.00 59.87
5,586.79 06/22/15 61.30 60.17
5,586.39 09/30/15 61.70 60.57
5,586.05 12/02/15 62.04 60.91
5,585.89 03/30/16 62.20 61.07
5,585.30 06/30/16 62.79 61.66
5,584.95 09/29/16 63.14 62.01
5,584.55 12/21/16 63.54 62.41
5,584.74 03/30/17 63.35 62.22
5,584.29 06/27/17 63.80 62.67
5,583.77 09/26/17 64.32 63.19
5,583.44 11/29/17 64.65 63.52
5,583.03 03/29/18 65.06 63.93
5,582.79 06/22/18 65.30 64.17
5,582.22 09/26/18 65.87 64 .74
5,582.14 12/17/18 65.95 64.82
5,581.49 03/26/19 66.60 65.47
5,581.18 06/24/19 66.91 65.78
5,581.12 08/13/19 66.97 65.84
5,580.93 11/19/19 67.16 66.03
5,580.54 02/13/20 67.55 66.42
5,580.24 05/05/20 67.85 66.72
5,579.73 09/22/20 68.36 67.23
Water Levels and Data over Time
White Mesa Mill-Well TWN-1
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,646 .96 5,648.09 1.13 106.13
5,579.54 12/30/20 68 .55 67.42
5,579.51 03/11/21 68.58 67.45
5,578 .97 06/24/21 69.12 67.99
5,578.84 08 /11/21 69.25 68 .12
5,579.03 12/28 /21 69.06 67 .93
5,578.38 02/10/22 69.71 68 .58
5,577.91 06/28/22 70.18 69 .05
5,577.88 08/15/22 70.21 69 .08
5,577.93 11/17/22 70.16 69.03
5,577.92 03 /24/23 70.17 69 .04
5,577.93 06 /27/23 70 .16 69 .03
5,577.09 09/28/23 71.00 69 .87
5,577.97 11/21/23 70.12 68 .99
5,576.94 03 /26 /24 71.15 70 .02
Water Levels and Data over Time
White Mesa Mill-Well TWN-2
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
{WL) {LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,625.75 5,626.69 0.94 95.9
5,611.37 2/6/09 15.32 14.38
5,610 .63 7/21/09 16.06 15.12
5,609.73 9/21/09 16.96 16.02
5,607.08 11/2/09 19.61 18.67
5,606.57 12/14/09 20.12 19.18
5,612.45 3/11/10 14.24 13.30
5,612.78 5/11/10 13.91 12.97
5,611.37 9/29/10 15.32 14.38
5,610.24 12/21/10 16.45 15.51
5,610.64 2/28/11 16.05 15.11
5,609.78 6/21/11 16.91 15.97
5,609.79 9/20/11 16.90 15 .96
5,609.72 12/21/11 16.97 16.03
5,605.69 3/27/12 21.00 20.06
5,605.67 6/28/12 21.02 20.08
5,603.03 9/27/12 23.66 22.72
5,605.76 12/28/12 20.93 19.99
5,598.28 3/28/13 28.41 27.47
5,594.32 6/27/13 32.37 31.43
5,594.38 9/27/13 32.31 31.37
5,594.68 12/20/13 32.01 31.07
5,597 .79 3/27/14 28.90 27 .96
5,595.80 6/25/14 30.89 29.95
5,587.67 9/25/14 39.02 38.08
5,592.66 12/17/14 34.03 33.09
5,596.71 3/26/15 29.98 29.04
5,598.64 6/22/15 28.05 27.11
5,597.89 9/30/15 28.80 27.86
5,597.89 12/2/15 28.80 27.86
5,594.25 3/30/16 32.44 31.50
5,590.26 6/30/16 36.43 35.49
5,591.67 9/29/16 35.02 34.08
5,592.92 12/21/16 33.77 32.83
5,589.05 3/30/17 37.64 36.7
5,589.69 6/27/17 37.00 36.06
5,590.71 9/26/17 35.98 35.04
5,591.65 11/30/17 35.04 34.10
5,574.69 3/28/18 52.00 51.06
5,586.49 6/22/18 40.20 39.26
5,550.31 9/24/18 76.38 75.44
5,568.32 12/17/18 58.37 57.43
5,553 .52 3/25/19 73.17 72.23
5,569.06 6/24/19 57.63 56.69
5,565.38 8/12/19 61.31 60.37
5,567.87 11/18/19 58.82 57.88
5,577.69 2/13/20 49.00 48.06
Water Levels and Data over Time
White Mesa Mill-Well TWN-2
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,625.75 5,626.69 0.94 95.9
5,566.89 5/5/20 59.80 58.86
5,570.34 9/21/20 56.35 55.41
5,562.46 12/28/20 64.23 63.29
5,568.57 3/11/21 58.12 57.18
5,558.22 6/24/21 68.47 67.53
5,568.34 8/11/21 58.35 57.41
5,568.92 12/28/21 57.77 56.83
5,568.09 2/10/22 58.60 57.66
5,568.00 6/28/22 58.69 57.75
5,558.48 8/15/22 68.21 67.27
5,567.88 11/17/22 58.81 57.87
5,561.54 3/24/23 65.15 64.21
5,567.38 6/27/23 59.31 58.37
5,565.54 9/28/23 61.15 60.21
5,563.51 11/21/23 63.18 62.24
5,545.56 3/25/24 81.13 80.19
Water Levels and Data over Time
White Mesa Mill-Well TWN-3
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,633.64 5,634.50 0.86 96
5,603.77 2/6/09 30.73 29.87
5,602.37 7/21/09 32.13 31.27
5,602.34 9/21/09 32.16 31.30
5,602.60 10/28/09 31.90 31.04
5,603.12 12/14/09 31.38 30.52
5,602.90 3111110 31.60 30.74
5,603.23 5/11/10 31.27 30.41
5,602.86 9/29/10 31.64 30.78
5,603.35 12/21/10 31.15 30.29
5,602.89 2/28/11 31.61 30.75
5,602.75 6/21/11 31.75 30.89
5,602.40 9/20/11 32.10 31 .24
5,602.40 12/21/11 32.10 31.24
5,601.70 3/27/12 32.80 31.94
5,601.67 6/28/12 32.83 31.97
5,600.50 9/27/12 34.00 33.14
5,601.74 12/28/12 32.76 31.90
5,598.60 3/28/13 35.90 35.04
5,597.18 6/27/13 37.32 36.46
5,597.36 9/27/13 37.14 36.28
5,597.60 12/20/13 36.90 36.04
5,598.00 3/27/14 36.50 35 .64
5,596.34 6/25/14 38.16 37.30
5,596.30 9/25/14 38.20 37.34
5,596.55 12/17/14 37.95 37.09
5,596.20 3/26/15 38.30 37.44
5,596.00 6/22/15 38.50 37.64
5,596.61 9/30/15 37.89 37.03
5,596.09 12/2/15 38.41 37.55
5,595.29 3/30/16 39.21 38.35
5,594.61 6/30/16 39.89 39.03
5,593.79 9/29/16 40.71 39 .85
5,594.20 12/21/16 40.30 39.44
5,594.20 3/30/17 40.30 39.44
5,592.85 6/27/17 41.65 40.79
5,592.60 9/26/17 41.90 41.04
5,593.33 11/29/17 41.17 40.31
5,592.55 3/29/18 41.95 41.09
5,592.45 6/22/18 42.05 41.19
5,592.90 9/26/18 41.60 40.74
5,594.29 12/18/18 40.21 39.35
5,591.99 3/26/19 42 .51 41.65
5,592.69 6/24/19 41.81 40.95
5,592.50 8/13/19 42.00 41.14
5,592.78 11/19/19 41.72 40.86
5,592.33 2/13/20 42.17 41.31
Water Levels and Data over Time
White Mesa Mill-Well TWN-3
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,591.78 5/5/20 42.72 41.86
5,591.67 9/22/20 42.83 41.97
5,592.09 12/30/20 42.41 41.55
5,591.62 3/11/21 42.88 42.02
5,591.89 6/24/21 42.61 41.75
5,591.66 8/11/21 42.84 41.98
5,592.09 12/28/21 42.41 41.55
5,591.01 2/10/22 43.49 42.63
5,590.28 6/28/22 44.22 43.36
5,590.28 8/15/22 44.22 43.36
5,590.70 11/17/22 43.80 42.94
5,590.29 3/24/23 44.21 43.35
5,590.30 6/27/23 44.20 43.34
5,590.05 9/28/23 44.45 43.59
5,589.78 11/21/23 44.72 43.86
5,589.78 3/26/24 44.72 43.86
Water Levels and Data over Time
White Mesa Mill-Well TWN-4
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,641.04 5,641.87 0.83 126.4
5,601.47 2/6/09 40.40 39.57
5,604.26 7/21/09 37.61 36.78
5,605.02 9/21/09 36.85 36.02
5,605.87 10/28/09 36.00 35.17
5,605.81 12/14/09 36.06 35.23
5,605.31 3/11/10 36.56 35.73
5,605.36 5/11/10 36.51 35.68
5,604.59 9/29/10 37.28 36.45
5,604.42 12/21/10 37.45 36.62
5,603.69 2/28/11 38.18 37.35
5,603.36 6/21/11 38.51 37.68
5,602.82 9/20/11 39.05 38.22
5,602.79 12/21/11 39.08 38.25
5,600.82 3/27/12 41.05 40.22
5,600.84 6/28/12 41.03 40.20
5,598.47 9/27/12 43.40 42.57
5,600.86 12/28/12 41.01 40.18
5,595.57 3/28/13 46.30 45.47
5,594.12 6/27/13 47.75 46.92
5,593.33 9/27/13 48.54 47.71
5,591.92 12/20/13 49.95 49.12
5,591.85 3/27/14 50.02 49.19
5,590.49 6/25/14 51.38 50.55
5,589.64 9/25/14 52.23 51.40
5,589.42 12/17/14 52.45 51.62
5,589.17 3/26/15 52.70 51.87
5,588.17 6/22/15 53.70 52.87
5,587.48 9/30/15 54.39 53.56
5,587.02 12/2/15 54.85 54.02
5,586.90 3/20/16 54.97 54.14
5,586.18 6/30/16 55.69 54.86
5,585.72 9/29/16 56.15 55.32
5,585.42 12/21/16 56.45 55.62
5,586.35 3/30/17 55.52 54.69
5,585.09 6/27/17 56.78 55.95
5,584.41 9/26/17 57.46 56.63
5,584.07 11/29/17 57.80 56.97
5,583.76 3/29/18 58.11 57.28
5,583.47 6/22/18 58.40 57.57
5,582.92 9/26/18 58.95 58.12
5,582.66 12/18/18 59.21 58.38
5,582.23 3/26/19 59.64 58.81
5,581.97 6/24/19 59.90 59.07
5,581.96 8/13/19 59.91 59.08
5,581.68 11/19/19 60.19 59.36
5,581.34 2/13/20 60.53 59.70
Water Levels and Data over Time
White Mesa Mill-Well TWN-4
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,641.04 5,641.87 0.83 126.4
5,580.99 5/5/20 60.88 60.05
5,580.45 9/22/20 61.42 60.59
5,580.34 12/30/20 61.53 60.70
5,580.29 3/11/21 61.58 60.75
5,579.80 6/24/21 62.07 61.24
5,579.55 8/11/21 62.32 61.49
5,579.87 12/28/21 62.00 61.17
5,579.25 2/10/22 62.62 61.79
5,578.69 6/28/22 63.18 62.35
5,578.74 8/15/22 63.13 62.3
5,579.02 11/17/22 62.85 62.02
5,578.68 3/24/23 63.19 62.36
5,578.67 6/27/23 63.20 62.37
5,577.81 9/28/23 64.06 63.23
5,577.35 11/21/23 64.52 63.69
5,577.83 3/26/24 64.04 63.21
Water Levels and Data over Time
White Mesa Mill-Well TWN-6
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,663.03 5,664 .94 l.91 131.91
5,589.52 8/25 /09 75.42 73.51
5,589.46 9/22/09 75.48 73.57
5,589.61 11/3/09 75.33 73.42
5,589.92 12/14/09 75.02 73.11
5,590.24 3/11/10 74 .70 72.79
5,590.40 5/11 /10 74.54 72.63
5,590.24 9/29/10 74.70 72.79
5,590.49 12/21/10 74.45 72.54
5,590.16 2/28/11 74 .78 72.87
5,590.44 6/21/11 74 .50 72.59
5,590.35 9/20/11 74.59 72.68
5,590.67 12/21/11 74.27 72.36
5,590.34 3/27/12 74.60 72.69
5,590.32 6/28 /12 74.62 72.71
5,589.77 9/27/12 75 .17 73.26
5,589.67 12/28 /12 75.27 73.36
5,589.45 3/28/13 75.49 73.58
5,589.01 6/27/13 75.93 74.02
5,588.99 9/27 /13 75.95 74 .04
5,588.15 12/20/13 76.79 74.88
5,588.50 3/27/14 76.44 74.53
5,588.03 6/25/14 76.91 75.00
5,587.74 9/25/14 77.20 75.29
5,587 .69 12/17/14 77.25 75.34
5,587.29 3/26/15 77 .65 75.74
5,587.04 6/22/15 77.90 75.99
5,586.93 9/30/15 78.01 76.10
5,586.72 12/2/15 78.22 76.31
5,586.92 3/30/16 78.02 76.11
5,586.32 6/30/16 78.62 76.71
5,586.16 9/29/16 78 .78 76.87
5,586.03 12/21/16 78.91 77.00
5,586.40 3/30/17 78.54 76.63
5,605.99 6/27/17 58 .95 57.04
5,585.76 9/26/17 79.18 77.27
5,585.59 11/29/17 79.35 77.44
5,585.63 3/29/18 79.31 77.4
5,585.59 6/22/18 79.35 77.44
5,585.26 9/26/18 79.68 77.77
5,585.27 12/18/18 79.67 77.76
5,585.16 3/26/19 79.78 77.87
5,585.05 6/24/19 79.89 77.98
5,584.86 8/13/19 80.08 78.17
5,585.14 11 /19/19 79.80 77.89
5,584.92 2/13 /20 80.02 78 . l 1
5,585.27 5/5/20 79.67 77.76
Water Levels and Data over Time
White Mesa Mill-Well TWN-6
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,663.03 5,664.94 1.91 131.91
5,584.46 9/22/20 80.48 78.57
5,584.58 12/30/20 80.36 78.45
5,584.73 3/11/21 80.21 78.30
5,584.38 6/24/21 80.56 78.65
5,584.25 8/11/21 80.69 78.78
5,584.46 12/28/21 80.48 78.57
5,584.20 2/10/22 80.74 78.83
5,583.89 6/28/22 81.05 79.14
5,583.89 8/15/22 81.05 79.14
5,584.26 11/17/22 80.68 78.77
5,583.88 3/24/23 81.06 79.15
5,583.90 6/27/23 81.04 79.13
5,583.70 9/28/23 81.24 79.33
5,583.30 11/21/23 81.64 79.73
5,584.02 3/26/24 80.92 79.01
Water Levels and Data over Time
White Mesa Mill-Well TWN-7
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,647.39 5,649.26 1.87 107.2
5,552.56 08/25/09 96.70 94.83
5,558.34 09/21/09 90.92 89.05
5,558.82 11/10/09 90.44 88.57
5,558.96 12/14/09 90.30 88.43
5,559.54 03/11/10 89.72 87.85
5,559.60 05/11/10 89.66 87.79
5,559.83 09/29/10 89.43 87.56
5,559.00 12/21/10 90.26 88.39
5,559.68 02/28/11 89.58 87.71
5,560.43 06/21/11 88.83 86.96
5,560.46 09/20/11 88.80 86.93
5,560.78 12/21/11 88.48 86.61
5,560.92 03/27/12 88.34 86.47
5,560.87 06/28/12 88.39 86.52
5,561.40 09/27/12 87.86 85.99
5,561.50 12/28/12 87.76 85.89
5,562.01 03/28/13 87.25 85.38
5,562.21 06/27/13 87.05 85.18
5,562.41 09/27/13 86.85 84.98
5,562.23 12/20/13 87.03 85.16
5,562.85 03/27/14 86.41 84.54
5,562.95 06/25/14 86.31 84.44
5,563.06 09/25/14 86.20 84.33
5,563.21 12/17/14 86.05 84.18
5,563.33 03/26/15 85.93 84.06
5,563.46 06/22/15 85.80 83.93
5,563.64 09/30/15 85.62 83.75
5,563.88 12/02/15 85.38 83.51
5,564.19 03/30/16 85.07 83.20
5,563.97 06/30/16 85.29 83.42
5,564.21 09/29/16 85.05 83.18
5,564.46 12/21/16 84.80 82.93
5,564.96 03/30/17 84.30 82.43
5,564.81 06/27/17 84.45 82.58
5,565.46 09/26/17 83.80 81.93
5,565.45 11/29/17 83.81 81.94
5,566.11 03/29/18 83.15 81.28
5,566.21 06/22/18 83.05 81.18
5,566.42 09/26/18 82.84 80.97
5,566.09 12/18/18 83.17 81.30
5,566.67 03/26/19 82.59 80.72
5,566.93 06/24/19 82.33 80.46
5,567.28 08/13/19 81.98 80.11
5,567.26 11/19/19 82.00 80.13
5,567.12 02/13/20 82.14 80.27
5,567.14 05/05/20 82.12 80.25
Water Levels and Data over Time
White Mesa Mill-Well TWN-7
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) {blw.LSD) Well
5,647.39 5,649.26 1.87 107.2
5,567.98 09/22/20 81.28 79.41
5,568.38 12/30/20 80.88 79.01
5,568.18 03/11/21 81.08 79.21
5,568.50 06/24/21 80.76 78.89
5,568.71 08/11/21 80.55 78.68
5,568.56 12/28/21 80.70 78.83
5,568.90 02/10/22 80.36 78.49
5,568.85 06/28/22 80.41 78.54
5,569.10 08/15/22 80.16 78.29
5,568.70 11/17/22 80.56 78.69
5,568.86 03/24/23 80.40 78.53
5,568.85 06/27/23 80.41 78.54
5,569.64 09/28/23 79.62 77.75
5,568.74 11/21/23 80.52 78.65
5,570.29 03/26/24 78.97 77.10
Water Levels and Data over Time
White Mesa Mill -Well TWN-14
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,647.80 5,649.53 1.73 124.73
5,586.18 11 /4/09 63 .35 61.62
5,586.51 12/14/09 63.02 61.29
5,586.71 3/11/10 62.82 61.09
5,586.72 5/11/10 62.81 61.08
5,586.53 9/29/10 63.00 61.27
5,586.80 12/21/10 62.73 61.00
5,586.74 2/28/11 62.79 61.06
5,586.84 6/21/11 62.69 60 .96
5,586.73 9/20/11 62.80 61.07
5,586.98 12/21/11 62.55 60.82
5,587.07 3/27/12 62.46 60.73
5,587.10 6/28/12 62.43 60 .70
5,587.07 9/27/12 62.46 60.73
5,587.33 12/28/12 62.20 60.47
5,587.43 3/28/13 I 62.10 60.37
5,587.43 6/27/13 62.10 60.37
5,587.72 9/27/13 61.81 60.08
5,587.22 12/20/13 62.31 60.58
5,587.91 3/27/14 61.62 59 .89
5,587.74 6/25 /14 61.79 60.06
5,587.76 9/25/14 61.77 60 .04
5,587.88 12/17/14 61.65 59.92
5,587.97 3/26/15 61.56 59 .83
5,587.98 6/22/15 61.55 59.82
5,588.18 9/30/15 61.35 59.62
5,588.23 12/2/15 61.30 59 .57
5,588.70 3/30/16 60.83 59.10
5,588.31 6/30/16 61.22 59.49
5,588.36 9/29/16 61.17 59.44
5,588.43 12/21/16 61.10 59.37
5,588.96 3/30/17 60.57 58.84
5,589.07 6/27/17 60.46 58.73
5,588.86 9/26/17 60.67 58.94
5,588.82 11/29/17 60.71 58 .98
5,589.12 3/29/18 60.41 58.68
5,589.19 6/22/18 60.34 58.61
5,589.12 9/26/18 60.41 58 .68
5,589.20 12/18/18 60.33 58.60
5,589.32 3/26/19 60.21 58.48
5,589.40 6/25/19 60.13 58.40
5,589.32 8/13/19 60.21 58.48
5,589 .59 11/19/19 59.94 58 .21
5,589.73 2/13/20 59.80 58.07
5,590.17 5/5/20 59.36 57.63
5,589.67 9/22/20 59.86 58.13
5,590.05 12/30/20 59.48 57 .75
Water Levels and Data over Time
White Mesa Mill-Well TWN-14
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,647.80 5,649.53 1.73 124 .73
5,590.14 3/11 /21 59.39 57.66
5,590.04 6/24/21 59.49 57 .76
5,590.05 8/11/21 59.48 57 .75
5,590.15 12/28 /21 59.38 57 .65
5,590.28 2/10/22 59 .25 57.52
5,590.18 6/28/22 59.35 57.62
5,590.27 8/15/22 59.26 57 .53
5,590.11 11/17/22 59.42 57.69
5,590.17 3/24/23 59.36 57.63
5,590.16 6/27/23 59.37 57 .64
5,590.62 9/28/23 58 .91 57.18
5,590.44 11/21/23 59 .09 57 .3 6
5,591.21 3/26/24 58.32 56 .59
Water Levels and Data over Time
White Mesa Mill-Well TWN-16
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,651.07 5,652.70 1.63 94.63
5,603.34 11/4/09 49.36 47.73
5,603.56 12/14/09 49.14 47 .51
5,603.84 3/11/10 48.86 47.23
5,604.31 5/11/10 48.39 46.76
5,604.28 9/29/10 48.42 46.79
5,604.39 12/21/10 48.31 46.68
5,604.20 2/28/11 48.50 46.87
5,604.55 6/21/11 48.15 46.52
5,604.74 9/20/11 47.96 46.33
5,604.94 12/21/11 47.76 46.13
5,604.84 3/27/12 47.86 46.23
5,604.85 6/28/12 47 .85 46.22
5,604.99 9/27/12 47.71 46.08
5,605.10 12/28/12 47.60 45.97
5,605.22 3/28/13 47.48 45.85
5,605.11 6/27/13 47.59 45.96
5,605.39 9/27/13 47.31 45.68
5,604.99 12/20/13 47.71 46.08
5,605.71 3/27/14 46.99 45.36
5,605.16 6/25/14 47.54 45.91
5,605.10 9/25/14 47.60 45.97
5,605.25 12/17/14 47.45 45.82
5,605.04 3/26/15 47.66 46.03
5,604.99 6/22/15 47.71 46.08
5,605.05 9/30/15 47.65 46.02
5,604.96 12/2/15 47.74 46.11
5,605.25 3/30/16 47.45 45.82
5,605.00 6/30/16 47.70 46.07
5,605.00 9/29/16 47.70 46.07
5,605.00 12/21/16 47.70 46.07
5,605.43 3/30/17 47.27 45.64
5,605.20 6/27/17 47.50 45 .87
5,605.00 9/26/17 47.70 46.07
5,605.02 11/29/17 47.68 46.05
5,605.11 3/29/18 47.59 45.96
5,605.19 6/22/18 47.51 45.88
5,604.99 9/26/18 47.71 46.08
5,605.18 12/19/18 47.52 45.89
5,605.06 3/26/19 47.64 46.01
5,604.96 6/24/19 47.74 46.11
5,604.87 8/13/19 47.83 46.20
5,605.19 11/19/19 47.51 45.88
5,605.02 2/13/20 47.68 46.05
5,605.30 5/5/20 47.40 45.77
5,604.85 9/22/20 47.85 46.22
5,604.99 12/30/20 47.71 46.08
Water Levels and Data over Time
White Mesa Mill-Well TWN-16
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) {blw.LSD) Well
5,651.07 5,652.70 1.63 94.63
5,604.99 3/11/21 47.71 46 .08
5,604.90 6/24/21 47.80 46.17
5,604.85 8/11/21 47.85 46.22
5,604.93 12/28/21 47.77 46.14
5,604.94 2/10/22 47.76 46 .13
5,604.70 6/28/22 48.00 46.37
5,604.73 8/15/22 47.97 46.34
5,604.86 11/17/22 47.84 46.21
5,604.69 3/24/23 48.01 46.38
5,604.70 6/27/23 48.00 46.37
5,604.68 9/28/23 48.02 46.39
5,604.32 11/21/23 48.38 46 .75
5,605.01 3/26/24 47 .69 46 .06
Water Levels and Data over Time
White Mesa Mill -Well TWN -18
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
{WL) (LSD) {MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,643.95 5,645.45 1.50 147
5,586.85 11/2 /09 58.60 57.10
5,600.14 12/14/09 45.31 43.81
5,587.36 3/11/10 58.09 56.59
5,587.71 5/11/10 57.74 56.24
5,587.50 9/29/10 57.95 56.45
5,607.66 12/21/10 37.79 36.29
5,587.35 2/28/11 58.10 56.60
5,587.71 6/21/11 57.74 56.24
5,587.65 9/20/11 57.80 56.30
5,587.95 12/21/11 57.50 56.00
5,587.05 3/27/12 58.40 56.90
5,587.05 6/28/12 58.40 56.90
5,587.50 9/27/12 57.95 56.45
5,587.50 12/28/12 57.95 56.45
5,587.32 3/28/13 58.13 56.63
5,586.95 6/27/13 58.50 57.00
5,587.02 9/27/13 58.43 56.93
5,586.26 12/20/13 59.19 57.69
5,586.87 3/27/14 58.58 57.08
5,586.23 6/25/14 59.22 57.72
5,586.02 9/25/14 59.43 57.93
5,585.99 12/17/14 59.46 57.96
5,585.66 3/26/15 59.79 58.29
5,585.45 6/22/15 60.00 58.50
5,585.37 9/30/15 60.08 58.58
5,585.24 12/2/15 60.21 58.71
5,585.38 3/30/16 60.07 58.57
5,584.85 6/30/16 60.60 59.10
5,584.69 9/29/16 60.76 59.26
5,584.60 12/21/16 60.85 59.35
5,584.99 3/30/17 60.46 58.96
5,584.65 6/27/17 60.80 59.30
5,584.36 9/26/17 61.09 59.59
5,584.24 11/29/17 61.21 59.71
5,584.25 3/29/18 61.20 59.70
5,584.23 6/22/18 61.22 59.72
5,583.92 9/26/18 61.53 60.03
5,583.85 12/18/18 61.60 60.10
5,583.72 3/26/19 61.73 60.23
5,583.69 6/24/19 61.76 60.26
5,583.76 8/13/19 61.69 60.19
5,583.72 11/19/19 61.73 60.23
5,583.54 2/13/20 61.91 60.41
5,583.34 5/5/20 62.11 60.61
5,583.15 9/22/20 62.30 60.80
5,583.26 12/30/20 62.19 60.69
Water Levels and Data over Time
White Mesa Mill -Well TWN -18
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
{WL) (LSD) (MP) Riser (L) Monitoring (b hv.MP) (blw.LSD) Well
5,643.95 5,645.45 1.50 147
5,583.36 3/11/21 62.09 60.59
5,583.06 6/24/21 62.39 60.89
5,583.01 8/11/21 62.44 60.94
5,583.10 12/28/21 62.35 60.85
5,582.80 2/10/22 62.65 61.15
5,582.34 6/28/22 63.11 61.61
5,582.42 8/15/22 63.03 61.53
5,582.49 11/17/22 62.96 61.46
5,582.32 3/24/23 63.13 61.63
5,582.35 6/27/23 63.10 61.60
5,582.25 9/28/23 63.20 61.70
5,581.90 11/21/23 63.55 62.05
5,582.55 3/26/24 62.9 61.40
Water Levels and Data over Time
White Mesa Mill-Well TWN-19
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD} Well
5,659.59 5,66 1.36 1.77 107.77
5,606.17 I 1/2/09 55.19 53.42
5,606.70 12/14/09 54.66 52 .89
5,607.22 3/1 I/IO 54.14 52.37
5,607.89 5/11/10 53.47 51.70
5,607.98 9/29/10 53.38 51.61
5,608.41 12/21/10 52.95 51.18
5,608.49 2/28/11 52.87 51.10
5,608.60 6/21/11 52.76 50.99
5,609.17 9/20/11 52.19 50.42
5,608.90 12/21/11 52.46 50.69
5,608.87 3/27/12 52.49 50.72
5,608.86 6/28/12 52.50 50.73
5,608.86 9/27/12 52.50 50.73
5,608.86 12/28/12 52.50 50.73
5,609.17 3/28/13 52.19 50.42
5,608.88 6/27/13 52.48 50.71
5,608.92 9/27/13 52.44 50.67
5,608.46 12/20/13 52.90 51.13
5,608.88 3/27/14 52.48 50.71
5,608.33 6/25/14 53.03 51.26
5,608.11 9/25/14 53.25 51.48
5,608.36 12/17/14 53.00 51.23
5,607.96 3/26/15 53.40 51.63
5,607.98 6/22/15 53.38 51.61
5,608.06 9/30/15 53.30 51.53
5,607.88 12/2/15 53.48 51.71
5,608.41 3/30/16 52.95 51.18
5,611.39 6/30/16 49.97 48.20
5,607.90 9/29/16 53.46 51.69
5,608.07 12/21/16 53.29 51.52
5,608.44 3/30/17 52.92 51.15
5,608.07 6/27/17 53.29 51.52
5,608.06 9/26/17 53.30 51.53
5,607.91 11/29/17 53.45 51.68
5,608.00 3/28/18 53.36 51.59
5,607.71 6/21/18 53.65 51.88
5,607.50 9/26/18 53.86 52.09
5,607.94 12/19/18 53.42 51.65
5,607.42 3/26/19 53.94 52.17
5,607.46 6/25/19 53.90 52.13
5,607.39 8/13/19 53.97 52.20
5,607.84 11/19/19 53.52 51.75
5,607.69 2/13/20 53.67 51.90
5,607.57 5/5/20 53.79 52.02
5,607.46 9/22/20 53.90 52.13
5,607.66 12/30/20 53.70 51.93
Water Levels and Data over Time
White Mesa Mill-Well TWN-19
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,659.59 5,661.36 1.77 107.77
5,607.75 3/11/21 53.61 51.84
5,607.39 6/24/21 53.97 52.20
5,607.33 8/11/21 54.03 52.26
5,607.81 12/28/21 53.55 51.78
5,607.26 2/10/22 54.10 52.33
5,606.86 6/28/22 54.50 52.73
5,606.94 8/15/22 54.42 52.65
5,606.85 11/17/22 54.51 52.74
5,606.85 3/24/23 54.51 52.74
5,606.84 6/27/23 54.52 52.75
5,607.59 9/28/23 53.77 52.00
5,607.79 11/21/23 53.57 51.80
5,607.55 3/26/24 53.81 52.04
Water Levels and Data over Time
White Mesa Mill-Well TWN-20
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,640.46 5,642.46 2.00 95.5
5,564.53 6/24/21 77.93 75.93
5,564.51 8/11/21 77.95 75.95
5,564.69 12/28/21 77.77 75.77
5,564.52 2/10/22 77.94 75.94
5,564.29 6/28/22 78.17 76.17
5,564.23 8/15/22 78.23 76.23
5,564.28 11/17/22 78.18 76.18
5,564.30 3/24/23 78.16 76.16
5,564.33 6/27/23 78.13 76.13
5,564.20 9/28/23 78.26 76.26
5,564.26 11/21/23 78.20 76.20
5,564.36 3/26/24 78.10 76.10
Water Levels and Data over Time
White Mesa Mill-Well TWN-21
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,633.08 5,635.08 2.00 105.7
5,555.84 6/24/21 79.24 77.24
5,555.89 8/11/21 79.19 77.19
5,555.93 12/28/21 79.15 77.15
5,555.95 2/10/22 79.13 77.13
5,555.79 6/28/22 79.29 77.29
5,555.81 8/15/22 79.27 77.27
5,555.90 11/17/22 79.18 77.18
5,555.81 3/24/23 79.27 77.27
5,555.84 6/27/23 79.24 77.24
5,556.02 9/28/23 79.06 77.06
5,555.73 11/21/23 79.35 77.35
5,556.38 3/26/24 78.70 76.70
Water Levels and Data over Time
White Mesa Mill -Well MW-30
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,613.34 5,614.50 1.16 110
5,534.92 10/24/06 79.58 78.42
5,535.09 3/16/07 79.41 78.25
5,535.46 8/27/07 79.04 77.88
5,535.06 10/15/07 79.44 78.28
5,535.78 3/15/08 78.72 77.56
5,536.26 6/15/08 78.24 77.08
5,536.35 9/15/08 78.15 76.99
5,536.68 11/15/08 77.82 76.66
5,535.42 3/15/09 79.08 77.92
5,537.11 6/30/09 77.39 76.23
5,536.93 9/10/09 77.57 76.41
5,537.23 12/11/09 77.27 76.11
5,537.59 3/11/10 76.91 75.75
5,537.85 5/11/10 76.65 75.49
5,538.37 9/29/10 76.13 74.97
5,537.70 12/21/10 76.8 75.64
5,537.67 2/28/11 76.83 75.67
5,538.31 6/21/11 76.19 75.03
5,538.15 9/20/11 76.35 75.19
5,538.42 12/21/11 76.08 74.92
5,538.54 3/27/12 75.96 74.8
5,538.60 6/28/12 75.9 74.74
5,538.68 9/27/12 75.82 74.66
5,538.99 12/28/12 75.51 74.35
5,539.25 3/28/13 75.25 74.09
5,539.05 6/27/13 75.45 74.29
5,539.60 9/27/13 74.90 73.74
5,539.67 12/20/13 74.83 73.67
5,539.77 3/27/14 74.73 73.57
5,539.40 6/25/14 75.10 73.94
5,539.19 9/25/14 75.31 74.15
5,539.30 12/17/14 75.20 74.04
5,539.01 3/26/15 75.49 74.33
5,538.99 6/22/15 75.51 74.35
5,539.10 9/30/15 75.40 74.24
5,538.90 12/2/15 75.60 74.44
5,539.53 3/30/16 74.97 73.81
5,539.11 6/30/16 75.39 74.23
5,539.05 9/29/16 75.45 74.29
5,539.06 12/21/16 75.44 74.28
5,539.81 3/30/17 74.69 73.53
5,539.60 6/27/17 74.90 73.74
5,539.40 9/27/17 75.10 73.94
5,539.30 11/30/17 75.20 74.04
5,539.55 3/29/18 74.95 73.79
5,539.63 6/22/18 74.87 73.71
5,539.40 9/26/18 75.10 73.94
5,539.59 12/17/18 74.91 73.75
5,539.42 3/26/19 75.08 73.92
5,539.70 6/24/19 74.80 73.64
5,539.45 8/13/19 75.05 73.89
5,539.53 11/19/19 74.97 73.81
5,539.57 2/13/20 74.93 73.77
Water Levels and Data over Time
White Mesa Mill-Well MW-30
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,613.34 5,614.50 1.16 110
5,539.27 5/5/20 75.23 74.07
5,539.25 9/22/20 75.25 74.09
5,539.41 12/30/20 75.09 73.93
5,539.45 3/11/21 75.05 73.89
5,539.34 6/24/21 75.16 74.00
5,539.32 8/11/21 75.18 74.02
5,539.56 12/28/21 74.94 73.78
5,539.18 2/10/22 75.32 74.16
5,539.02 6/27/22 75.48 74.32
5,539.16 8/15/22 75.34 74.18
5,538.99 11/17/22 75.51 74.35
5,539.00 3/24/23 75.50 74.34
5,539.02 6/27/23 75.48 74.32
5,539.20 9/28/23 75.30 74.14
5,538.78 11/21/23 75.72 74.56
5,539.55 3/26/24 74.95 73.79
Water Levels and Data over Time
White Mesa Mill -Well MW-31
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,615.26 5,616.40 1.14 130
5,544.07 10/24/06 72.33 71.19
5,544.45 3/16/07 71.95 70.81
5,536.94 8/27/07 79.46 78.32
5,544.62 10/15/07 71.78 70.64
5,545.37 3/15/08 71.03 69.89
5,544.50 6/15/08 71.90 70.76
5,545.94 9/15/08 70.46 69.32
5,546.42 11/15/08 69.98 68.84
5,546.03 3/15/09 70.37 69.23
5,546.65 6/30/09 69.75 68.61
5,546.45 9/10/09 69.95 68.81
5,546.75 12/11/09 69.65 68.51
5,547.09 3/11/10 69.31 68.17
5,547.41 5/11/10 68.99 67.85
5,547.28 9/29/10 69.12 67.98
5,547.45 12/21/10 68.95 67.81
5,547.37 2/28/11 69.03 67.89
5,547.96 6/21/11 68.44 67.3
5,547.65 9/20/11 68.75 67.61
5,548.34 12/21/11 68.06 66.92
5,548.30 3/27/12 68.10 66.96
5,548.40 6/28/12 68.00 66.86
5,548.59 9/27/12 67.81 66.67
5,548.91 12/28/12 67.49 66.35
5,549.14 3/28/13 67.26 66.12
5,548.90 6/27/13 67.50 66.36
5,549.25 9/27/13 67.15 66.01
5,549.16 12/20/13 67.24 66.10
5,548.95 3/27/14 67.45 66.31
5,548.60 6/25/14 67.80 66.66
5,548.19 9/25/14 68.21 67.07
5,548.25 12/17/14 68.15 67.01
5,548.14 3/26/15 68.26 67.12
5,547.85 6/22/15 68.55 67.41
5,548.00 9/30/15 68.40 67.26
5,547.84 12/2/15 68.56 67.42
5,548.35 3/30/16 68.05 66.91
5,548.00 6/30/16 68.40 67.26
5,547.80 9/29/16 68.60 67.46
5,547.80 12/21/16 68.60 67.46
5,548.30 3/30/17 68.10 66.96
5,548.10 6/27/17 68.30 67.16
5,547.93 9/27/17 68.47 67.33
5,547.80 11/30/17 68.60 67.46
5,547.92 3/29/18 68.48 67.34
5,547.95 6/22/18 68.45 67.31
5,547.69 9/26/18 68.71 67.57
5,547.82 12/17/18 68.58 67.44
5,547.56 3/26/19 68.84 67.70
5,547.68 6/24/19 68.72 67.58
5,547.56 8/13/19 68.84 67.70
5,547.58 11/19/19 68.82 67.68
5,547.59 2/13/20 68.81 67.67
5,547.92 5/5/20 68.48 67.34
5,547.18 9/22/20 69.22 68.08
Water Levels and Data over Time
White Mesa Mill -Well MW-31
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,615.26 5,616.40 1.14 130
5,547.29 12/30/20 69.11 67.97
5,547.53 3/11/21 68.87 67.73
5,547.14 6/24/21 69.26 68.12
5,547.07 8/11/21 69.33 68.19
5,547.21 12/28/21 69.19 68.05
5,546.97 2/10/22 69.43 68.29
5,546.65 6/27/22 69.75 68.61
5,546.80 8/15/22 69.60 68.46
5,546.65 11/17/22 69.75 68.61
5,546.66 3/24/23 69.74 68.6
5,546.70 6/27/23 69.70 68.56
5,546.66 9/28/23 69.74 68.6
5,546.25 11/21/23 70.15 69.01
5,546.49 3/26/24 69.91 68.77
TabG
Laboratory Analytical Reports
Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
lABORArORIES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: PIEZ-01_02152024
Matrix: Water
Date Sampled: 2/15/24 9:35
I norganic
Chloride
Nitrate+ Nitrite, Total, as N
Result
76.4
6.20
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
Units
mg/L
mg/L
Certificate of Analysis
Minimum
Reporting
Limit
1.00
0.500
PO#:
Receipt: 2/20/24 11:30 @0.1 °C
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Sampled By: Tanner Holliday
Method
EPA300.0
EPA353.2
CtF WO#: 24B1330
Preparation
Date/Time
2/20/24
2/21/24
Lab ID: 24B1330-12
Analysis
Date/Time
2121/24
2/21/24
Flag(s)
Page 14 of 20
Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
!..ABOP.ATORlES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: PIEZ-02_02152024
Matrix: Water
Date Sampled: 2/15/24 9:15
Inorganic
Chloride
Nitrate+ Nitrite, Total, as N
14.3
0.828
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
Units
mg/L
mg/L
Certificate of Analysis
Minimum
Reporting
Y!!!ll
1.00
0.100
PO#:
Receipt: 2/20/24 11 :30 @ 0.1 ·c
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Sampled By: Tanner Holliday
Method
EPA300.0
EPA353.2
CtF WO#: 24B1330
Preparation
Date/Time
2/20/24
2/21/24
Lab ID: 24B1330-11
Analysis
Date/Time
2/21/24
2/21/24
fil!g{ll
Page 13 of 20
I Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
L ABORATORIES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: PIEZ-03A_02152024
Matrix: Water
Date Sampled: 2/15/24 10:00
I norganic
Chloride
Nitrate+ Nitrite, Total, as N
80.5
13.3
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
Units
mg/L
mg/L
Certificate of Analysis
Minimum
Reporting
Limit
10.0
0.500
PO#:
Receipt: 2/20/24 11:30@0.1 °C
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Sampled By: Tanner Holliday
Method
EPA300.0
EPA353.2
CtF WO#: 2481330
Preparation
Date/Time
2/20/24
2/21/24
Lab ID: 24B1330-13
Analysis
Date/Time
2/21/24
2/21/24
Page 15 of 20
Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
!..ABO?.ATORIES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: TWN-01_02142024
Matrix: Water
Date Sampled: 2/14/24 10:54
I norganic
Chloride
Nitrate+ Nitrite, Total, as N
36.4
2.67
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
Units
mg/L
mg/L
Certificate of Analysis
Minimum
Reporting
Limit
1.00
0.100
PO#:
Receipt: 2/20/24 11:30@0.1 ·c
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Sampled By: Tanner Holliday
Method
EPA300.0
EPA353.2
CtF WO#: 24B1330
Preparation
Date/Time
2/20/24
2/21/24
Lab ID: 24B1330-04
Analysis
Date/Time
2/20/24
2/21/24
Flag(s)
Page 6 of 20
Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
.. .Alio11.A 0,uu.
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: TWN-02_02142024
Matrix: Water
DateSampled: 2/14/24 11:10
I norganic
Chloride
Nitrate+ Nitrite, Total, as N
Result
64.4
14.9
Project Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
Units
rng/L
rng/L
Certificate of Analysis
Minimum
Reporting
Limit
1.00
0.500
PO#:
Receipt: 2/20/24 11 :30 @ 0.1 ·c
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Sampled By: Tanner Holliday
EPA300.0
EPA353.2
CtF WO#: 2481330
Preparation
Date/Time
2/20/24
2/21/24
Lab ID: 24B1330-05
Analysis
Date/Time
2/20/24
2/21/24
Flag(s)
Page 7 of 20
I Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
lABORATORIES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: TWN-03_02152024
Matrix: Water
Date Sampled: 2/15/24 9:05
Inorganic
Chloride
Nitrate+ Nitrite, Total, as N
176
33.5
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
mg/L
mg/L
Certificate of Analysis
Minimum
Reporting
Limit
10.0
1.00
PO#:
Receipt: 2/20/24 11:30@0.1 ·c
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Sampled By: Tanner Holliday
Method
EPA300.0
EPA353.2
CtF WO#: 24B1330
Preparation
Date/Time
2/20/24
2121/24
Lab ID: 24B1330-10
Analysis
Date/Time
2121124
2121/24
Page 12 of 20
Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
lABORATORlES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: TWN-04_02142024
Matrix: Water
Date Sampled: 2/14/24 10:21
Inorganic
Chloride
Nitrate + Nitrite, Total, as N
Result
21.8
1.25
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
Units
mg/L
mg/L
Certificate of Analysis
Minimum
Reporting
Limit
1.00
0.100
PO#:
Receipt: 2/20/24 11 :30 @ 0.1 ·c
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Sampled By: Tanner Holliday
Method
EPA300.0
EPA353.2
CtF WO#: 2481330
Preparation
Date/Time
2/20/24
2/21/24
Lab ID: 24B1330-03
Analysis
Date/Time
2/20/24
2/21/24
~
Page 5 of 20
I Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
-AUl0tl,.A r 0)(1L3.
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: TWN-07 _02152024
Matrix: Water
Date Sampled: 2/15/24 8:55
I norganic
Chloride
Nitrate+ Nitrite, Total, as N
133
17.5
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
Units
mg/L
mg/L
Certificate of Analysis
Minimum
Reporting
Limit
10.0
0.500
PO#:
Receipt: 2/20/24 11:30@ 0.1 ·c
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Sampled By: Tanner Holliday
EPA300.0
EPA353.2
CtF WO#: 2481330
Preparation
Date/Time
2/20/24
2/21/24
Lab ID: 24B1330-09
Analysis
Date/Time
2/20/24
2/21/24
Flag(s)
Page 11 of 20
I Chemtech-F ord Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
LABORATORIES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: TWN-18_02142024
Matrix: Water
Date Sampled: 2/14/24 8:35
Inorganic
Chloride
Nitrate+ Nitrite, Total, as N
39.3
0.139
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
Units
mg/L
mg/L
Certificate of Analysis
Minimum
Reporting
Limit
1.00
0.100
PO#:
Receipt: 2/20/24 11:30@0.1 ·c
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Sampled By: Tanner Holliday
Method
EPA300.0
EPA353.2
CtF WO#: 2481330
Preparation
Date/Time
2/20/24
2/21/24
Lab ID: 24B1330-01
Analysis
Date/Time
2/20/24
2/21/24
Flag(s)
Page 3 of 20
I Chemtech-F ord Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
L ABORATORIES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID : TWN-18R_02142024
Matrix: Water
Date Sampled: 2/14/24 8:00
lnorg:utic
Chloride
Nitrate+ Nitrite, Total, as N
< 1.00
< 0.100
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
Units
mg/L
mg/L
Certificate of Analysis
Minimum
Reporting
Limit
1.00
0.l00
PO#:
Receipt: 2/20/24 11:30 @0.1 °C
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Sampled By: Tanner Holliday
Method
EPA300.0
EPA353.2
CtF WO#: 24B1330
Preparation
Date/Time
2/2 0/24
2/21 /24
Lab ID : 24B1330-02
Analysis
Date/Time
2/20/24
2/21 /24
Flag(s)
Page 4 of 20
I Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
lABDRArORIES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: TWN-20_02152024
Certificate of Analysis
PO#:
Receipt: 2/20/24 11 :30 @ 0.1 ·c
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Matrix: Water Lab ID: 24B1330-07
Date Sampled: 2/15/24 8:30 Sampled By: Tanner Holliday
Inorganic
Chloride
Nitrate+ Nitrite, Total, as N
35 .9
0.323
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
rng/L
rng/L
Minimum
Reporting Preparation
Limit
1.00
0.100
Method
EPA300.0
EPA353.2
CtF WO#: 24B1330
Date/Time
2/20/24
2/21/24
Analysis
Date/Time
2/20/24
2/21/24
Flag(s)
Page 9 of 20
I Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0 :[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FOR0
!..ABOJIATORIES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID : TWN-21_02152024
Certificate of Analysis
PO#:
Receipt: 2/20/24 11:30@0.1 •c
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Matrix: Water Lab ID: 24B1330-08
Date Sampled: 2/15/24 8:45 Sampled By: Tanner Holliday
Inorganic
Chloride
Nitrate+ Nitrite, Total, as N
44 .9
I.II
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
Units
mg/L
mg/L
Minimum
Reporting Preparation
Limit
1.00
0.100
Method
EPA300.0
EPA353 .2
CtF WO#: 24B1330
Date/Time
2/20/24
2/21/24
Analysis
Date/Time
2/20/24
2/21 /24
Flag(s)
Page 10 of 20
Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
LABORATORIES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: 1W4-22_02212024
Matrix: Water
Date Sampled: 2/21/24 12:30
Jnoq.?;anic
Chloride
Nitrate+ Nitrite, Total, as N
\'ola!ilc Or~~nic ( ompounds
Carbon Tetrachloride
Chloroform
Chloromethane
Methylene Chloride
Result
489
53.9
< 1.0
2180
< 1.0
1.0
Proiect Name: 1st Quarter Chloroform 2024
www. Chem tech Ford. com
Units
mg/L
mg/L
ug/L
ug/L
ug/L
ug/L
Certificate of Analysis
Minimum
Reporting
Limit
10.0
2.00
1.0
50 .0
1.0
1.0
PO#:
Receipt: 2/23/24 10:30 @ -0.1 °C
Date Reported: 3/7/2024
Project Name: 1st Quarter Chloroform 2024
Sampled By: Tanner Holliday
Method
EPA300.0
EPA353 .2
EPA 8260D/50308
EPA 8260D/50308
EPA 8260D/50308
EPA 8260D/50308
CtF WO#: 24B1726
Preparation
Date/Time
2/23/24
2/28/24
2/26/24
2/26/24
2/26/24
2/26/24
Lab ID: 24B1726-13
Analysis
Date/Time
2/24/24
2/28/24
2/26/24
2/26/24
2/26/24
2/26/24
Flag(s)
Page 15 of 29
Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
:..ABOAATORIES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: TW4-24_02212024
Matrix: Water
Certificate of Analysis
PO#:
Receipt: 2/23/24 10:30 @-0.1 ·c
Date Reported: 3/7/2024
Project Name: 1st Quarter Chloroform 2024
Date Sampled: 2/21/24 12:20 Sampled By: Tanner Holliday
I norganit:
Chloride
Nitrate+ Nitrite, Total, as N
\'olalilc Organic Cnmpoumls
Carbon Tetrachloride
Chloroform
Chloromethane
Methylene Chloride
Result
1130
40 ,6
< 1.0
87 ,6
< 1.0
< 1.0
Proiect Name: 1st Quarter Chloroform 2024
www.ChemtechFord.com
mg/L
mg/L
ug/L
ug/L
ug/L
ug/L
Minimum
Reporting Preparation
20.0
2.00
1.0
5.0
1.0
1.0
EPA300.0
EPA353 .2
EPA 8260D/50308
EPA 8260D/50308
EPA 8260D/50308
EPA 8260D/50308
CtF WO#: 2481726
Date/fime
2/26/24
2/28/24
2/26/24
2/26/24
2/26/24
2/26/24
Lab ID: 24B1726-02
Analysis
Date/fime
2/26/24
2/28/24
2/26/24
2/26/24
2/26/24
2/26/24
Page 4 of29
I Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
~ABOf!ATORICS
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: TW4-25_02212024
Certificate of Analysis
PO#:
Receipt: 2/23/24 10:30@ -0.1 °C
Date Reported: 3/7/2024
Project Name: 1st Quarter Chloroform 2024
Matrix: Water Lab ID: 24Bl 726-01
Date Sampled: 2/21/24 12:08 Sampled By: Tanner Holliday
I norganic
Chloride
Nitrate+ Nitrite, Total, as N
\'olatilc Organic Compoumls
Carbon Tetrachloride
Chloroform
Chloromethane
Methylene Chloride
74 .3
0.581
< 1.0
< 1.0
< 1.0
< 1.0
Proiect Name: 1st Quarter Chloroform 2024
www.ChemtechFord.com
mg/L
mg/L
ug/L
ug/L
ug/L
ug/L
Minimum
Reporting Preparation
1i.l!!!!
1.00
0.100
1.0
1.0
1.0
1.0
EPA300.0
EPA 353.2
EPA 8260D/5030B
EPA 8260D/5030B
EPA 8260D/5030B
EPA 8260D/5030B
CtF WO#: 24B1726
Date/fime
2/23/24
2/28/24
2/26/24
2/26/24
2/26/24
2/26/24
Analysis
Date/fime
2/23/24
2/28/24
2/26/24
2/26/24
2/26/24
2/26/24
Flag(s)
Page 3 of29
I Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
LAS ORATORIES
Energy Fuels Resources, Inc .
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID: TWN-60_02152024
Matrix: Water
Date Sampled : 2/15/24 12:30
Inorganic
Chloride
Nitrate+ Nitrite, Total, as N
< 1.00
<0.100
Proiect Name : 1st Quarter Nitrate 2024
www.ChemtechFord.com
Units
mg/L
mg/L
Certificate of Analysis
Minimum
Reporting
Limit
1.00
0.100
PO#:
Receipt: 2/20/24 11:30@ 0.1 ·c
Date Reported : 2/27/2024
Project Name : 1st Quarter Nitrate 2024
Sampled By: Tanner Holliday
Method
EPA300 .0
EPA353.2
CtF WO#: 24B1330
Preparation
Date/Time
2/20/24
2/21/24
Lab ID: 24B1330-14
Analysis
Date/Time
2/21 /24
2/21/24
Flag(s)
Page 16 of 20
I Chemtech-F ord Laboratories 9632 South 500 West
Sandy, UT 84070
0 :[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
!..ABORATORLES
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID : TW4-60_02222024
Certificate of Analysis
PO#:
Receipt: 2/23/24 10:30@ -0.1 ·c
Date Reported: 3/7/2024
Project Name : 1st Quarter Chloroform 2024
Matrix: Water Lab ID: 24B1726-17
Date Sampled : 2/22/24 7:30 Sampled By: Tanner Holliday
lnor~anic
Chloride
Nitrate+ Nitrite, Total, as N
\ olatilc Oq:anic Compounth
Carbon Tetrachloride
Chloroform
Chloromethane
Methylene Chloride
< 1.00
0.103
< 1.0
< 1.0
< 1.0
< 1.0
Proiect Name: 1st Quarter Chloroform 2024
www.ChemtechFord.com
Units
mg/L
mg/L
ug/L
ug/L
ug/L
ug/L
Minimum
Reporting Preparation
Limit
1.00
0.1 00
I 0
I 0
1.0
1.0
Method
EPA300.0
EPA353.2
EPA 8260D/50308
EPA 8260D/50308
EPA 8260D/50308
EPA 8260D/50308
CtF WO#: 2481726
Date/Time
2/23/24
2/28/24
2/27/24
2/27/24
2/27/24
2/27/24
Analysis
Date/fime
2/24/24
2/28/24
2/27/24
2/27/24
2/27/24
2/27/24
Flag(s}
Page 19 of 29
I Chemtech-Ford Laboratories 9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Serving the lntermountain West Since 1953
CHEMTECH-FORD
!.A80RATORIE:S
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Sample ID : TWN-65_02142024
Matrix: Water
Date Sampled: 2/14/24 8:35
lnor!(anic
Chloride
Nitrate+ Nitrite, Total, as N
39.5
0 .157
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
Units
mg/L
mg/L
Certificate of Analysis
Minimum
Reporting
Limit
1.00
0 .100
PO#:
Receipt: 2/20/24 11:30@ 0.1 •c
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
Sampled By: Tanner Holliday
Method
EPA300.0
EPA353.2
CtF WO#: 24B1330
Preparation
Date/Time
2/20/24
2/21 /24
Lab ID: 24B1330-06
Analysis
Date/Time
2/20/24
2/21 /24
Flag(sl
Page 8 of 20
9632 South 500 West
I
CHEMTECH·FORD
l ,0,80~•\TO~l f S
2/27/2024
Work Order: 2481330
Project: 1st Quarter Nitrate 2024
Energy Fuels Resources, Inc.
Attn: Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Client Service Contact: 801.262. 7299
The analyses presented on this report were performed in accordance with the
National Environmental Laboratory Accreditation Program (NELAP) unless
noted in the comments, flags, or case narrative . If the report is to be used for
regulatory compliance, it should be presented in its entirety, and not be
altered.
Approved By :
Melissa Connolly, Project Manager
Sandy, Utah 84070 801.262 .7299 Main 866.792.0093 Fax
Serving the lntermountain West since 1953
www.ChemtechFord.com
Page 1 of 20
Chemtech-Ford Laboratories
Serving the lntermountain West Since 1953
CHEMTECH-FORD
9632 South 500 West
Sandy, UT 84070
0 :[phone] F: [phone]
www.ChemtechFord.com
Energy Fuels Resources, Inc.
Project: 1st Quarter Nitrate 2024
Project Manager: Tanner Holliday
Laboratory ID
24B1330-01
24B1330-02
2481330-03
2481330-04
2481330-05
2481330-06
2481330-07
2481330-08
2481330-09
2481330-10
2481330-11
24B1330-12
2481330-13
2481330-14
Sample Name
TWN-18_02142024
TWN-18R_02142024
TWN-04_02142024
TWN-01 _02142024
TWN-02_02142024
TWN-65_02142024
TWN-20_02152024
TWN-21 _02152024
TWN-07_02152024
TWN-03_02152024
PIEZ-02_02152024
PIEZ-01 _02152024
PIEZ-03A_02152024
TWN-60_02152024
Sample Preparation
Work Order Report Narrative
All samples were prepared within method specified holding times . No preparation issues were noted .
Method Blanks
All blank values were within method acceptance criteria . No blank values exceeded the minimum reporting limit for any
analysis in this work order.
Laboratory Control Samples
All laboratory control samples were within method acceptance criteria.
Method Spikes
All method spike recoveries were within method acceptance criteria, except as noted by qualifying flags.
Method Spike Duplicates
All method spike duplicates were within method acceptance criteria , except as noted by qualifying flags.
Corrective Actions
There are no corrective actions associated with this work order.
Page 2 of 20
CHEMTECH-FORD
lABORATORIES
Chemtech-Ford Laboratories
Serving the lntermountain West Since 1953
9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Certificate of Analysis
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Report Footnotes
Abbreviations
ND= Not detected at the corresponding Minimum Reporting Limit (MRL).
PO#:
Receipt: 2/20/24 11:30 @0.1 ·c
Date Reported: 2/27/2024
Project Name: 1st Quarter Nitrate 2024
I mg/L = one milligram per liter or I mg/kg= one milligram per kilogram = I part per million .
I ug/L = one microgram per liter or I ug/kg = one microgram per kilogram = I part per billion .
I ng/L = one nanogram per liter or I ng/kg = one nanogram per kilogram = 1 part per trillion.
Proiect Name: 1st Quarter Nitrate 2024
www.ChemtechFord.com
CtF WO#: 2481330
Page 17 of 20
American West
Analytical Laboratories
d63 W 36D0 S Sall Lake Cily. UT 84115
Phone• (8D1) 263-8686 Toll Free• [phone]
L~~ Fax# (8D1) 263-8687 Email awal@awal-labs com
www.awal-labs .com
Client Energy Fuela Resource ■, Inc.
Address : 6425 S. Hwy, 191
Blanding, UT 84611
ConlBct : Tanner Holliday .
Phone#: [phone] Cell#:
Ema it tboWda,,-a,enerafuela.com; KWelneYa,enerE7ru.■la.com
Project Name : 1st Quarter Ritra.te 2024
Project#:
PO#:
Sampler Name : Tanner Holliday
Samole ID: Date Samoled
TWll-18_02142024 2/14/2024
TWll-18R_02142024 2/14/2024
• TWll-04_02142024 2/14/2024
TWll-01_02142024 2/14/2024
TWll-02_02142024 2/14/2024
, TWll-65_02142024 2/14/2024
TW1'-20_02152024 2/15/2024
, TW1'-21_02152024 2/15/2024
I TWll-07_02152024 2/15/2024
I TW1'-03_02152024 2/15/2024
I PIBZ-02_02152024 2/15/2024
! PIBZ-01_02152024 2/15/2024
I PIBZ-03A_02152024 2/15/2024
• 'n911-60_02152024 2/15/2024
I
:::urelmhed b/" ~ .. ~ _ • ., /ll //./ -,/ Date:
2)1912.02-4
-rime:
Print Name: Tanner Hollldav 1100
~efnqullhed by: O•ta:
Siqnatur:111
Tlme :
PmlNarne:
RellnquBhed by. l)ale:
Slgrature
T.-ne:
IPriflr Name:
Aets,queneoby: !)a le :
SlonahJro
rme :
PmlN,t11me·
Time
Samoled
835
800
1021
1054
1110
835
830
845
855
905
915
935
1000
1230
R-hy
Skin,ll~~
I
CHAIN OF CUSTODY
All arelysb wil be canductDd usng NE LAP eceredled methods and all data wil be reporlad ushg AWAL's stendard analyte lisb and mporting
Im b (PQL) unleas specir1C8lly requested olherwise on lhb Chari or Custody end/or attached documen1alkm
QC Laval: I Tum Around Time: Unless other orrnngemonts have been mAde,
signed reports wtll be em sled by 5:00 pm on
3 Standard the dAy they are duo
X Include EDD:
LOCUS UPLOAD
EXCEL
Field Filtered For:
Fo, Comptlance With :
D NELAP
D RCRA
D CWA
D SOWA
D ELAP/A2LA
o' D NLLAP
~ d D Non-Compliance
~ c:, □ Other. "' I!' l:l. ... ., l; ., 0
C c:, ·s ~ 0 c:, Known Hazards a ., Ill "' --<t. u t ~ &
'c u .. Samele Comments .. "'
2 w X X
2 w X X (\ip 1?,4,Z.,
2 w X X N ,~o
2 w X X
2 w X X
2 w X X
2 w X X
2 w X X
2 w X X
2 w X X Sample Receipt Conditions:
~
/4cc.t Con tainers
~
/... tody S.ol, Pc-nl 2 w X X
1::1:BJ3&)
AWAL Lab Sample Set#
Page 1 of I
rue Date:
Laboratory Use Only
Sample5Wel'9:
1 Shipped or hand deltvered
2 Ambenl or Chiled
3 Tamperattxe _Qj_-c
4 RecelYed Brokenll...aeldng
(lmpmpeffy Sealed)
y N
5 Proper1yPraserwd
y N
Cheeked at bench
y N
G RecelwldWlhln
Holding Times
y N
f"-.LV".Tape,Waa: , PntSerConOul•Package
y N NA
2 Unbroken on Outer Package
y N NA
3 Prasanton Sample
y N NA
4 Unbrofl.en on Sample
y N NA
( ) Headspace Present {VOC)
( ) Temperature Blank %10,11,dQd
~
u11.n('o. l n t,\C.l
2 w X X 0C •od 1..,b(,ls M.11<h OCCompk!i, ,,vf lf.,<etvod w;Uw ld
~ceived on Ice .vrs:;f ficient Sample Volume
2 w X X Ch c,c ked by:
2 w X X I I I I
~~ ~ /
./
~ _/ O•lo: '7 . 'l.O-Z1 Special Instructions:
I
...-C-·1ftJ-r<r') ·rme: I 1'31)
Recef\ledby: o ... -
Sig ......
Tme : ~w .PmtNam.~
Recerved'by: Oatti : t Z 1117Y4 YO]•l7~75627
Skmature l.0 00 : 13 : ~ 7 W24 HIPP . Trne:
PrWName:
R..,.._byc Oats:
:Sbnshn1 Page 18 of iTlme:
Print Name~ I
20
Analyte
QC Sample ID: BYB0746-BLK1
Date Prepared: 02/20/2024
Chloride
QC Sample ID: BYB0746-BS1
Date Prepared: 02/20/2024
Chloride
QC Sample ID: BYB0746-MS 1
Date Prepared: 02/20/2024
Chloride
QC Sample ID: BYB0746-MS2
Date Prepared: 02/20/2024
Chloride
QC Sample ID: BYB0746-MSDI
Date Prepared: 02/20/2024
Chloride
QC Sample ID: BYB0746-MSD2
Date Prepared: 02/20/2024
Chloride
CtF WO#: 24B1330
www.ChemtechFord.com
QC Report for Work Order (WO) -24B1330
%Rec RPO Limits RPO Max Result Source Cone Spk Value MRL OF
Blank -EPA 300.0
Batch: BYB0746
Date Analyzed: 02/20/2024 Units: mg/L
ND 1.00 1.00
LCS -EPA 300.0
Batch: BYB0746
Date Analyzed: 02/20/2024 Units: mg/L
102 90 -110 50.9 50 .0 1.00 1.00
Matrix Spike -EPA 300.0
Batch: BYB0746 QC Source Sample: 24Bl330-0l
Date Analyzed: 02/20/2024 Units: mg/L
102 80-120 50.6 39.3 11.1 1.11 1.00
Batch: BYB0746 QC Source Sample: 24B1330-02
Date Analyzed: 02/20/2024 Units: mg/L
97.4 80-120 10.8 ND 11.1 1.11 1.00
Matrix Spike Dup -EPA 300.0
Batch: BYB0746 QC Source Sample: 24Bl330-0l
Date Analyzed: 02/20/2024 Units: mg/L
106 0.801 80 -120 20 51.1 39.3 11.1 1.11 1.00
Batch: BYB0746 QC Source Sample: 24Bl330-02
Date Analyzed: 02/20/2024 Units: mg/L
99.6 2.24 80 -120 20 11.1 ND 11.1 1.11 1.00
Page 19 of 20
QC Report for Work Order (WO)· 24B1330
Analyte % Rec RPD Limits RPD Max Result Source Cone
Blank • EPA 353.2
QC Sample ID: BYB0793-BLK1 Batch: BYB0793
Date Prepared: 02/21/2024 Date Analyzed: 02/21/2024 Units: mg/L
Nitrate + Nitrite, Total, as N ND
LCS -EPA 353.2
QC Sample ID: BYB0793-BS1 Batch: BYB0793
Date Prepared: 02/21/2024 Date Analyzed: 02/21/2024 Units: mg/L
Nitrate+ Nitrite, Total, as N 109 90 -110 2.17
Matrix Spike -EPA 353.2
QC Sample ID: BYB0793-MS1 Batch: BYB0793 QC Source Sample: 24B1330-0l
Date Prepared: 02/2 l /2024 Date Analyzed: 02/21/2024 Units: mg/L
Nitrate + Nitrite, Total, as N 110 90 -110 1.24 0.139
Matrix Spike Dup -EPA 353.2
QC Sample ID: BYB0793-MSD1 Batch: BYB0793 QC Source Sample: 24B1330-01
Date Prepared: 02/21/2024 DateAnalyzed: 02/21/2024 Units: mg/L
Nitrate+ Nitrite, Total, as N 111 0.721 90-110 20 1.25 0.139
QM-12 -The MSD recovery was outside acceptance limits, but passed duplicate spike acceptance criteria. The batch
was accepted based on the acceptability of the MS.
CtF WO#: 24B1330
www.ChemtechFord.com
Spk Value MRL DF
0.100 1.00
2.00 0.100 1.00
1.00 0.100 1.00
1.00 0 .100 1.00
Page 20 of 20
9632 South 500 West
CHEMTECH ·FORD
lABO~•\TO~li::S
3/7/2024
Work Order: 24B 1726
Project: 1st Quarter Chloroform 2024
Energy Fuels Resources, Inc.
Attn: Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Client Service Contact: 801.262.7299
The analyses presented on this report were performed in accordance with the
National Environmental Laboratory Accreditation Program (NELAP) unless
noted in the comments, flags, or case narrative . If the report is to be used for
regulatory compliance, it should be presented in its entirety, and not be
altered.
Approved By :
Melissa Connolly, Project Manager
Sandy, Utah 84070 801 .262 .7299 Main 866 .792.0093 Fax
Serving the lntermounta in West since 1953
www.ChemtechFord.com
Page 1 of 29
CHEMTECH-FORD
LABO;iATORIES
Chemtech-Ford Laboratories
Serving the lntermountain West Since 1953
9632 South 500 West
Sandy, UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Energy Fuels Resources, Inc .
Project: 1st Quarter Chloroform 2024
Project Manager: Tanner Holliday
Laborato!Y ID Sam12le Name
24B1726-01 TW4-25_02212024
24B1726-02 TW4-24_02212024
24B1726-03 TW4-40_02212024
24B1726-04 MW-26_02212024
24B1726-05 TW4-02_02212024
24B1726-06 TW4-39_02212024
24B1726-07 TW4-01_02212024
24B1726-08 TW4-04_02212024
24B1726-09 TW4-41_02212024
24B1726-10 TW4-21_02212024
24B1726-11 TW4-19_02212024
24B1726-12 MW-04_02212024
24B1726-13 TW4-22_02212024
24B1726-14 TW4-11_02212024
24B1726-15 TW4-37 _02212024
24B1726-16 Trip Blank
24B1726-17 TW4-60_02222024
Sample Preparation
Work Order Report Narrative
All samples were prepared within method specified holding times. No preparation issues were noted.
Method Blanks
All blank values were within method acceptance criteria. No blank values exceeded the minimum reporting limit for any
analysis in this work order.
Laboratory Control Samples
All laboratory control samples were within method acceptance criteria.
Method Spikes
All method spike recoveries were within method acceptance criteria, except as noted by qualifying flags.
Method Spike Duplicates
All method spike duplicates were within method acceptance criteria, except as noted by qualifying flags.
Corrective Actions
There are no corrective actions associated with this work order.
Page 2 of 29
I
CHEMTECH-FORD
!..AEIORATORIES
Chemtech-Ford Laboratories
Serving the lntermountain West Since 1953
9632 South 500 West
Sandy , UT 84070
0:[phone] F: [phone]
www.ChemtechFord.com
Certificate of Analysis
Energy Fuels Resources, Inc.
Tanner Holliday
6425 South Highway 191
Blanding, UT 84511
Report Footnotes
Abbreviations
ND= Not detected at the corresponding Minimwn Reporting Limit (MRL).
PO#:
Receipt: 2/23/24 10:30 @ -0.1 ·c
Date Reported : 3/7/2024
Project Name: 1st Quarter Chloroform 2024
1 mg/L = on e milligram per liter or I mg/kg = one milligram per kilogram = I part per million.
1 ug/L = one microgram per liter or 1 ugi1cg = one microgram per kilogram = 1 part per billion.
1 ng/L = one nanogram per liter or I ngi1cg = one nanogram per kilogram = I part per trillion.
Flag Descriptions
J-High-C = Analyte estimated high based on CCV recovery
Proiect Name: 1st Quarter Chloroform 2024
www.ChemtechFord.com
CtF WO#: 24B1726
Page 20 of 29
American West
Analytical Laboratories
463W 3600S Sall l ake C1ty.LfT 84115
Phone# (B01 ) 263-861'6 Toll Free# (BRll ) 263-8611/;
L~~ Fax # [phone] Email awal@awal-labs corn
www.awal-labs.com
Client: Energy Fuels Reaource ■, Inc.
Address: 6425 8. Hwy. 191
Blanding, UT 84511
Contact; Tanner Holliday
Phone#: [phone] Cell#:
Emeit: t.baUld•J'••aCTVfta:•.la.CP"ID I KWelneYaenerc,ftlelll.com
Pr~ect Name: l ■t Quarter Chloroform 2024
Project#:
PO#:
Sampler Name: Tanner Holliday
ot9 ~q,t:,
Samele .ID: Date Samoled
TW4-2S_02212024 2/21/2024
TW4-24_02212024 2/21/2024
TW4-40_02212024 2/21/2024
--26_02212024 2/21/2024
TW4-02_02212024 2/21/2024
TW4-39_02212024 2/21/2024
TW4-01_02212024 2/21/2024
TW4-04_02212024 2/21/2024
TW4-41_02212024 2/21/2024
) TW4-21_02212024 2/21/2024
I TW4-19_02212024 2/21/2024
! IIIW-04_02212024 2/21/2024
I TW4-22_02212024 2/21/2024
I TW4-11_02212024 2/21/2024
; TW4-37.02212024 2/21/2024
> TRIP BLAlfK 2/21/2024
• TW4-60_02222024 2/22/2024
""""""......,.,. 1 f/-,,1,'I.L-... 011 1•·
S.01'1111Ur. • ~•• ff.If' ./ mmoi• , ~
Prw N11me lannM 1-illlhday '"" ~e1rnqu1shad by
d °}.~ S lonalura .
\ ' 'f'""'
CHAIN OF CUSTODY
All eir,alr,iis will be conducteid using, NELAP accrediled methods and all data will be reported u11ing AWAL's standard anelyte lists end reporting
limil!I (PQL) unle" specificnlly rnquested otherwise on lhis Chain of Custody end/or attached documentation
I QC Laval: I Turn Around Tlma: Unless olher arrangement, hew been made,
sjgned l'llpcrts will be ema~ed by 5 00 pm on
3 Standard the day they are due
K Include EDD:
LOCUS UPLOAD
BXCBL
Field Filtered For.
For Compll■nce WHh:
□ NELAP
□ RCRA
□ CWA
□ SOWA
0 ELAP IA2LA
c □ NLLAP
i-i' c O Non-CompHence
~ 0 ~ □ Olher: "' ; ~ ~ ~ <') 0 "' i ~ 0 0 "' 0 i'2. Known Hazards 15 Ill "' Time u Jl -::!:. i ~ .. & 0 0 0 Sampled ~ Sample Comments .. "' Ill
1208 6 w X X X
1220 5 w X X X
1352 5 w X X X
1254 5 w X X X
1310 5 w X X X
1245 5 w X X X
1328 5 w X X X
1344 5 w X X X
1335 5 w X X X
1200 5 w X X X
1410 6 w X X X
1320 5 w X X X
1230 5 w X X X
1302 5 w X X X
1238 5 w X X X
1200 J w X
730 5 w X X X
:::~ J/"/U e t1 0"'2{~124 Special Instructions:
Prin1N•: 'A-rh-V.t ~ 'f p"'
n ma: 1ojO
AWAL Lab Sample Set#
Page 1 of 1 r .. ~ tl;••
Laboratory Use Only
SamptesWera:
1 Shipped or hand deliwntd
2 Amblenl or Chlllod (j
3 Temperature -~·c
• A!KIM!d e.ro11M.o•l'tlo
(Improperly Sealed)
y N
• Property Pf$Nrwd
y N
Checked at bench
y N
• RaceMtd Wilhln
Holding Timas
y N
COCTapaW-.
1 Pnlsant on outer Package
y N NA
2 Unbroken on Outar P ■ckaga
y N NA
3 Present on Semple
y N NA
4 Unbroken on Sample
y N NA
DiaQapancle11 Between Sample
labels and CCC Record?
y N
r~i-.,:tdby: 0111e Sec the Analytical Scope of Work for Reporting Limits and voe
SiaMtur• e.nalyte list. ~\'P ~ ~N~· ~,"' N -\?,t/0 ¥'?'-13 w(3) l~J7 ~\""111.,_,...., R ■i"IUV~bf' up, l7J1?7 '/ 4 'f 0--Z. q Cj;y'-{ Cf 45 i:s.onatu10 Sample Receiet Conditions:
( ) Headspace Present (VOC)
Pt1flltJ,utw1 .. ---~ ,-__ .,_. __ rr
Rolrnouht'ltMlby ( ) Temperature Blank
:s.o ...... n Roo,,v~d within Hold
I
~
F'riMIU,nne. yrrt, Ch 0<kedb)'_: ttt/ Page 21 of 29
QC Report for Work Order (WO) -24B1726
Analyte %Rec RPO Limits RPO Max Result Source Cone SpkValue MRL OF
Blank -EPA 300.0
QC Sample ID: BYB0939-BLK1 Batch: BYB0939
Date Prepared: 02/23/2024 Date Analyzed: 02/23/2024 Units: mg/L
Chloride ND 1.00 1.00
QC Sample ID: BYB0955-BLK1 Batch: BYB0955
Date Prepared: 02/23/2024 Date Analyzed: 02/23/2024 Units: mg/L
Chloride ND 1.00 1.00
QC Sample ID: BYB0987-BLK1 Batch: BYB0987
Date Prepared: 02/26/2024 Date Analyzed: 02/26/2024 Units: mg/L
Chloride ND 1.00 1.00
LCS -EPA 300.0
QC Sample ID: BYB0939-BS1 Batch: BYB0939
Date Prepared: 02/23/2024 Date Analyzed: 02/23/2024 Units: mg/L
Chloride 97.8 90 -110 48.9 50.0 1.00 1.00
QC Sample ID: BYB0955-BS1 Batch: BYB0955
Date Prepared: 02/23/2024 Date Analyzed: 02/23/2024 Units: mg/L
Chloride 97.9 90 -110 48.9 50.0 1.00 1.00
QC Sample ID: BYB0987-BS1 Batch: BYB0987
Date Prepared: 02/26/2024 Date Analyzed: 02/26/2024 Units: mg/L
Chloride 97.5 90-110 48.7 50.0 1.00 1.00
Matrix Spike -EPA 300.0
QC Sample ID: BYB0939-MS l Batch: BYB0939 QC Source Sample: XXXXXXX-XX
Date Prepared: 02/23/2024 Date Analyzed: 02/23/2024 Units: mg/L
Chloride 94.0 80 -120 143 49.0 100 11.0 1.00
QC Sample ID: BYB0939-MS2 Batch: BYB0939 QC Source Sample: 24Bl 726-01
Date Prepared: 02/23/2024 Date Analyzed: 02/23/2024 Units: mg/L
Chloride 94.6 80 -120 84.8 74.3 11.1 1.11 1.00
QC Sample ID: BYB0955-MS1 Batch: BYB0955 QC Source Sample: XXXXXXX-XX
Date Prepared: 02/23/2024 Date Analyzed: 02/23/2024 Units: mg/L
Chloride 95.3 80 -120 263 168 100 11.0 1.00
QC Sample ID: BYB0955-MS2 Batch: BYB0955 QC Source Sample: XXXXXXX-XX
Date Prepared: 02/23/2024 Date Analyzed: 02/24/2024 Units: mg/L
Chloride 98.5 80 -120 430 332 100 11.0 1.00
QC Sample ID: BYB0987-MS1 Batch: BYB0987 QC Source Sample: XXXXXXX-XX
Date Prepared: 02/26/2024 Date Analyzed: 02/26/2024 Units: mg/L
Chloride 93.8 80 -120 14.7 4.32 11.1 1.11 1.00
QC Sample ID: BYB0987-MS2 Batch: BYB0987 QC Source Sample: XXXXXXX-XX
Date Prepared: 02/26/2024 Date Analyzed: 02/26/2024 Units: mg/L
Chloride 94.6 80 -120 15.6 5.13 11.1 1.11 1.00
Matrix Spike Dup -EPA 300.0
QC Sample ID: BYB0939-MSD1 Batch: BYB0939 QC Source Sample: XXXXXXX-XX
Date Prepared: 02/23/2024 Date Analyzed: 02/23/2024 Units: mg/L
Chloride 93.7 0.226 80 -120 20 143 49.0 100 11.0 1.00
QC Sample ID: BYB0939-MSD2 Batch: BYB0939 QC Source Sample: 24Bl726-0l
Date Prepared: 02/23/2024 Date Analyzed: 02/23/2024 Units: mg/L
Chloride 96.1 0.189 80 -120 20 85.0 74.3 11.1 1.11 1.00
CtF WO#: 24B1726
www. Chem tech Ford. com Page 22 of 29
Analyte
QC Sample ID: BYB0955-MSDI
Date Prepared: 02/23/2024
Chloride
QC Sample ID: BYB0955-MSD2
Date Prepared: 02/23/2024
Chloride
QC Sample ID: BYB0987-MSDI
Date Prepared: 02/26/2024
Chloride
QC Sample ID: BYB0987-MSD2
Date Prepared: 02/26/2024
Chloride
CtF WO#: 2481726
www.ChemtechFord.com
QC Report for Work Order (WO) -2481726
% Rec RPO Limits RPO Max Result Source Cone
Matrix Spike Dup -EPA 300.0 (cont.)
Batch: BYB0955 QC Source Sample: XXXXXXX-XX
Date Analyzed: 02/23/2024 Units: mg/L
92.8 0.938 80 -120 20 261 168
Batch: BYB0955 QC Source Sample: XXXXXXX-XX
Date Analyzed: 02/24/2024 Units: mg/L
97.1 0.331 80 -120 20 429 332
Batch: BYB0987 QC Source Sample: XXXXXXX-XX
Date Analyzed: 02/26/2024 Units: mg/L
97.5 2.77 80 -120 20 15.2 4.32
Batch: BYB0987 QC Source Sample: XXXXXXX-XX
Date Analyzed: 02/26/2024 Units: mg/L
97.8 2.25 80-120 20 16.0 5.13
SpkValue MRL OF
100 11.0 1.00
100 11.0 1.00
11.1 1.11 1.00
11.1 1.11 1.00
Page 23 of 29
Analyte
QC Sample ID: BYB1096-BLK1
Date Prepared: 02/28/2024
Nitrate+ Nitrite, Total, as N
QC Sample ID: BYB1096-BS1
Date Prepared: 02/28/2024
Nitrate+ Nitrite, Total, as N
QC Sample ID: BYB1096-MS1
Date Prepared: 02/28/2024
Nitrate+ Nitrite, Total, as N
QC Sample ID: BYB1096-MS2
Date Prepared: 02/28/2024
Nitrate+ Nitrite, Total, as N
QC Sample ID: BYB1096-MSD1
Date Prepared: 02/28/2024
Nitrate+ Nitrite, Total, as N
QC Sample ID: BYB1096-MSD2
Date Prepared: 02/28/2024
Nitrate+ Nitrite, Total, as N
CtF WO#: 24B1726
www.ChemtechFord.com
QC Report for Work Order (WO) -24B1726
% Rec RPD Limits RPD Max Result Source Cone
Blank -EPA 353.2
Batch: BYB1096
Date Analyzed: 02/28/2024 Units: mg/L
ND
LCS -EPA 353.2
Batch: BYB1096
Date Analyzed: 02/28/2024 Units: mg/L
102 9D-11D 2.05
Matrix Spike -EPA 353.2
Batch: BYB1096 QC Source Sample: 24B 1726-01
Date Analyzed: 02/28/2 024 Units: mg/L
106 9D-11D 1.64 0 .581
Batch: BYB 1096 QC Source Sample: 24B 1726-02
Date Analyzed: 02/28/2024 Units: mg/L
110 9D -11 D 41.7 40.6
Matrix Spike Dup -EPA 353.2
Batch: BYB 1096 QC Source Sample: 24B 1726-01
Date Analyzed: 02/28/2024 Units: mg/L
100 3.47 9D -11 D 2D 1.58 0 .581
Batch: BYB 1096 QC Source Sample: 24B 1726-02
Date Analyzed: 02/28/2024 Units: mg/L
106 0.103 9D -11 D 2D 41.7 40.6
Spk Value MRL DF
0.100 1.00
2.00 0.100 1 .00
1.00 0.100 1 .00
1.00 2.00 20 .00
1.00 0.100 1 .00
1.00 2.00 20.00
Page 24 of 29
TabH
Quality Assurance and Data Validation Tables
H-1: Field QA/QC Evaluation
1x Casing 2x Casing
Location Volume Volume Pumped Volume Volume Check Conductivity
PIEZ-01 okay 2546
P IEZ-02 okay 1015
PIEZ-03A okay 1109
TWN-01 22.70 55.00 45.4 okay 944 959
TWN~02 NA Gpn\in\JOUSly Pumped w ell -1989
7WN•Qr 33'.,5Ji 49.75 6?.12 PI.IIT)ped0ry, 2Jl9.6 239}
TWN -04 40 :49 99 .00 80.98 okay 1068 1066
Mfl.l-,9? 187:29,, 2Z.0Q I ~M .. 8 P1.1mp_e._d (l)fy rf9 4'1 1l5.0
TWN-18 54.70 121.00 109.4 okay 2951 2950
TWN-20; t'.2:9,7 14.6"6, ~{>.9}l Pumlte:O lil1¥ 2.959 29,pO
1WN•21 ,-19'::0_2 24:15~ aa.64 Pumped.D!Y1 3_74~ _37§2 -
TWN-02 ls a con tinually pumped well.
TWN-03 TWN•07 TWN~20 , TW·N-21 were . ump.ed d!Y ~n.d samfj ed aft,~r reeeve •,
NM= Not Measured. The QAP does not require the measurement of redox potential or turbidity in wells that were purged to dryness.
RPO = Relative Percent Difference
RPD p H RPD Temperature RPD Redox RPD
NC 7.38 NC 13.56 NC 348 NC
NC 7.25 NC 13.45 NC 359 NC
NC 7.38 NC 13.57 NC 331 NC
1.58 6.98 7.00 0.29 15.21 15.20 0.07 543 I 539 0.74
NC 6 .95 NG: 14.11 NC 397 N€
J).0~ T.25 7:24 0.14 14.63 :14.~9 0.27 NM N~
0.19 6 .82 6 .87 0 .73 14 .76 14.76 0.00 499 I 492 1.41
,0.1:{) J .6.0. 7 .~8 .!:J .?P 14.~1 1~.36 0.35 NM l)J~
0.03 6.89 6.80 1.31 14.45 14.37 0.56 297 I 296 0.34
Q.14 ·;q2 7-.~~ ~2'l 14.98, 14.9,!i .G.2€1 NM N€
D.19 11.'2% 721 '0_.28 1'4:46' 14.5Q 0.28 NM !ii"(:;"
The QAP states that turbidity should be less than 5 Nephelometric Turbidity Units ("NTU") prior to sampling unless the well is characterized by water that has a higher turbidity. The QAP does not require that turbidity measurements be less than 5 NTU prior to
sampling. As such, the noted observations regarding turbidity measurements less than 5 NTU are included for information purposes only.
Turbidity RPD Dissolved Oxvqen RPD
46.0 NC 72.3 NC
1.0 NC 36.2 NC
210.0 NC 89.0 NC
3.0 I 3.1 3.28 47.0 I 50.0 6.19
0 NC 91 .3,. NC
NM_ NC: NM tilt
0 I 0 0.00 67.0 I 66.3 1.05
NM NC NM NC
2 .6 I 2.7 3.77 0 I 0 0.00
NM NC NM NG
NM NG 1\-JM til~
H-2· Holding Time Evaluation
Allowed
Hold Time Hold Time Hold Time
Location ID Parameter Name Sample Date Analysis Date (Days) <Days) Check
PIEZ-01 Chloride 02/15/2024 02/21/2024 6 28 OK
PIEZ-01 Nitrate+ Nitrite as N 02/15/2024 02/21/2024 6 28 OK
PIEZ-02 Chloride 02/15/2024 02/21/2024 6 28 OK
PIEZ-02 Nitrate + Nitrite as N 02/15/2024 02/21/2024 6 28 OK
PIEZ-03A Chloride 02/15/2024 02/21/2024 6 28 OK
PIEZ-03A Nitrate + Nitrite as N 02/15/2024 02/21/2024 6 28 OK
TWN-01 Chloride 02/14/2024 02/20/2024 6 28 OK
TWN-01 Nitrate + Nitrite as N 02/14/2024 02/21/2024 7 28 OK
TWN-02 Chloride 02/14/2024 02/20/2024 6 28 OK
TWN-02 Nitrate + Nitrite as N 02/14/2024 02/21/2024 7 28 OK
TWN-03 Chloride 02/15/2024 02/21/2024 6 28 OK
TWN-03 Nitrate + Nitrite as N 02/15/2024 02/21/2024 6 28 OK
TWN-04 Chloride 02/14/2024 02/20/2024 6 28 OK
TWN-04 Nitrate + Nitrite as N 02/14/2024 02/21/2024 7 28 OK
TWN-07 Chloride 02/15/2024 02/20/2024 5 28 OK
TWN-07 Nitrate + Nitrite as N 02/15/2024 02/21/2024 6 28 OK
TWN-18 Chloride 02/14/2024 02/20/2024 6 28 OK
TWN-18 Nitrate+ Nitrite as N 02/14/2024 02/21/2024 7 28 OK
TWN-18R Chloride 02/14/2024 02/20/2024 6 28 OK
TWN-18R Nitrate+ Nitrite as N 02/14/2024 02/21/2024 7 28 OK
TWN-20 Chloride 02/15/2024 02/20/2024 5 28 OK
TWN-20 Nitrate+ Nitrite as N 02/15/2024 02/21/2024 6 28 OK
TWN-21 Chloride 02/15/2024 02/20/2024 5 28 OK
TWN-21 Nitrate + Nitrite as N 02/15/2024 02/21/2024 6 28 OK
TWN-60 Chloride 02/15/2024 02/21/2024 6 28 OK
TWN-60 Nitrate+ Nitrite as N 02/15/2024 02/21/2024 6 28 OK
TWN-65 Chloride 02/14/2024 02/20/2024 6 28 OK
TWN-65 Nitrate + Nitrite as N 02/21/2024 02/24/2024 3 28 OK
TW4-22 Chloride 02/21/2024 02/28/2024 7 28 OK
TW4-22 Nitrate+ Nitrite as N 02/21/2024 02/26/2024 5 28 OK
TW4-24 Chloride 02/21/2024 02/28/2024 7 28 OK
TW4-24 Nitrate+ Nitrite as N 02/21/2024 02/23/2024 2 28 OK
TW4-25 Chloride 02/21/2024 02/28/2024 7 28 OK
TW4-25 Nitrate+ Nitrite as N 02/22/2024 02/24/2024 2 28 OK
TW4-60 Chloride 02/22/2024 02/27/2024 5 28 OK
TW4-60 Nitrate + Nitrite as N 02/22/2024 02/28/2024 6 28 OK
H-3: Analytical Method Check
Puameter Method Metliod Used by, Lab
Nitrate E353.l or E353.2 E353.2
A4500-Cl B or A4500-Cl E
Chloride or E300.0 E300.0
Both Nitrate and Chloride were analyzed with the correct analytical method.
H-4 Reporting Limit Check
Required
Lab Reporting Dilution Reporting RL
Location Analyte Limit Units Qualifier Factor Limit Check
PIEZ-01 Chloride 1 mg/L 1 1 OK
PIEZ-01 Nitrate+ Nitrite as N 0.5 mg/L 5 0.1 OK
PIEZ-02 Chloride 1 mg/L 1 1 OK
PIEZ-02 Nitrate+ Nitrite as N 0.1 mg/L 1 0.1 OK
PIEZ-03A Chloride 10 mg/L 10 1 OK
PIEZ-03A Nitrate+ Nitrite as N 0.5 mg/L 5 0.1 OK
TWN-01 Chloride 1 mg/L 1 1 OK
TWN-01 Nitrate + Nitrite as N 0.1 mg/L 1 0.1 OK
TWN-02 Chloride 1 mg/L 1 1 OK
TWN-02 Nitrate+ Nitrite as N 0.5 mg/L 5 0.1 OK
TWN-03 Chloride 10 mg/L 10 1 OK
TWN-03 Nitrate + Nitrite as N 1 mg/L 10 0.1 OK
TWN-04 Chloride 1 mg/L 1 1 OK
TWN-04 Nitrate + Nitrite as N 0.1 mg/L 1 0.1 OK
TWN-07 Chloride 10 mg/L 10 1 OK
TWN-07 Nitrate+ Nitrite as N 0.5 mg/L 5 0.1 OK
TWN-18 Chloride 1 mg/L 1 1 OK
TWN-18 Nitrate+ Nitrite as N 0.1 mg/L 1 0.1 OK
TWN-18R Chloride 1 mg/L u 1 1 OK
TWN-18R Nitrate+ Nitrite as N 0.1 mg/L u 1 0.1 OK
TWN-20 Chloride 1 mg/L 1 1 OK
TWN-20 Nitrate+ Nitrite as N 0.1 mg/L 1 0.1 OK
TWN-21 Chloride 1 mg/L 1 1 OK
TWN-21 Nitrate+ Nitrite as N 0.1 mg/L 1 0.1 OK
TWN-60 Chloride 1 mg/L u 1 1 OK
TWN-60 Nitrate+ Nitrite as N 0.1 mg/L u 1 0.1 OK
TWN-65 Chloride 1 mg/L 1 1 OK
TWN-65 Nitrate + Nitrite as N 0.1 mg/L 1 0.1 OK
TW4-22 Chloride 10 mg/L 10 1 OK
TW4-22 Nitrate+ Nitrite as N 2 mg/L 20 0.1 OK
TW4-24 Chloride 20 mg/L 20 1 OK
TW4-24 Nitrate + Nitrite as N 2 mg/L 20 0.1 OK
TW4-25 Chloride 1 mg/L 1 1 OK
TW4-25 Nitrate+ Nitrite as N 0.1 mg/L 1 0.1 OK
TW4-60 Chloride 1 mg/L u 1 1 OK
TW4-60 Nitrate+ Nitrite as N 0.1 mg/L 1 0.1 OK
H-5 QA/QC Evaluation for Sample Duplicates
t::'u.il~ "TW:N-04 ~•s %.RPD
Chloride 39.3 39.5 051
Nitrogen 0.14 0.)6 12 .16
1~4\(Lb e approved QAP, a11 RPO greater{lmm 20% 'is acceptable
1'1'1'1:h.~·f eported resuJts ;-'l'i:,;,-k,s: il1}l n t times rli e J'?.;I . T l:te~~
~:~.,.•11'1i ,,ir provided ' ·a1imt ,nnatibf!i only.
H-6 QC Control Limits for Analysis and Blanks
Method Blank Detections
All Method Blanks for the quarter were non-detect.
Matrix Spike % Recovery Comparison
REC
Lab Report Lab Sample ID Well Analyte MS¾REC MSD¾REC Range RPD
24Bl330 24Bl330-01 TWN-18 Nitrate 110 111 90-110 0.90
Laboratory Control Sample
Laboratory Control Sample results for the quarter were within laboratory acceptance limits.
H-7 Rece ipt Tempera tu re Evaluation
Sample Batch Well s in Batc h Temperatu,re
24B1330 PIEZ-01, PIEZ-02, PIEZ-03A, TWN-1, TWN-2, TWN-3, TWN-4, TWN-0.l°C
7, TWN-18, TWN-18R, TWN-20, TWN-21, TWN-60, TWN-65
24B1726 TW4-22, TW4-24, TW4-25, TW4-60 -0.1 °C
H-8 Rinsate Evaluation
All rinsate and DI blank samples were non-detect for the quarter.
Tab I
Kriged Current Quarter Isoconcentration Maps
(l~y
MW-21
EXPLANATION
l'IS • MW-20
NS • MW-3A
NS= not sampled ; ND= not detected
---10
MW-41 8
"9-1.5
TW4-43
~0.53
TWN-21
C1 1.1
TW4-42
¢ 3.5
MW-32
e ND
TW4-7
0 4.1
TWN-1
◊2.7
PIEZ-1
'-6.2
kriged nitrate isocon and label
perched monitoring well installed April,
2023 showing concentration in mg/L
temporary perched monitoring well
installed September, 2021 showing
concentration in mg/L
temporary perched nitrate monitoring
well installed April , 2021 showing
concentration in mg/L
temporary perched monitoring well
installed April, 2019 showing
concentration in µg/L
perched monitoring well showing
concentration in µg/L
temporary perched monitoring well
showing concentration in µg/L
temporary perched nitrate monitoring
well
perched piezometer
NS • MW-29
o.n
D
TWN-20
,,,~ • MW-17
,~ • MW-38
N& • MW-01
ab?.rn:Toni:'1
0
TWN-05
t i.-~
•~nCIOft o<I o'·
TWN-15
~~llOMd • TWN-10
a11andon • TWN-11
• TWN-14
NS ,;
abl ndonod • TWN-09
• MW-18
01-4 • TWN-18
.
TWN-06
A0,111$ci
TWN-08
....
P1Ei.iJ1 /
NS • MW-19
\
-· . Q_.53
';:;;r
TWN-0 /
'0
" Jr.4ill ~~•,·tl
iiTW4-09o ~ 0 :1
~..4 . ...i: l'Wf.1 '?"' ,. ...
16 '4-11 ,-~ TW4-13
~~4'02 04 2
' . TW . ''ff:W-44 ,, 14 ''lf'· -===:::~~ TW/la °iw4-36
MW-32 • :-:f#'4-01
. rt,~
1W4-0~;1W4;41 I
l °Jw4-14
TW4-06o . 7 i -lW4-l;3 rp ;, ·• cl ~-'j27TW4-31
"•P1.10 .'TW4-2 ~4-3!_ -..~ OQ 5
~1 ·, ·1w4.29~ ~o -ra , ~o ~ .... , ,j :. • . 0 -~
:rw~ •.4o TW · ~-43
l TW4-34
2.◄
MW-40
• MW-39
~
1 mile
!S. • MW-22
NOTES: MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-11, TW4-19, TW4-21, TW4-37, TW4-39, TW4-40 and TW4-41 are
chloroform pumping wells; TW4-22, TW4-24, TW4-25 and TWN-2 are nitrate pumping wells; MW-24A installed December, 2019
HY □R □
GE □
CHEM. INC.
KRIGED 1st QUARTER, 2024 NITRATE (mg/L)
WHITE MESA SITE
A PPROV ED DATE REFERENCE
H:/718000/may24/nitrate/Unt0324 . srf
FIGURE
1-1
dt ·,1 ..
MW-21
EXPLANATION
.... , • M.W-20
NS • MW-3A
NS = not sampled; ND= not detected
...____ 100
MW-418
"9"40
TW4-43
~42
TWN-21
E]45
TW4-42
¢ 24
MW-32
.39
TW4-7
Q 45
TWN-1
◊36
PIEZ-1
'-76
kriged chloride isocon and label
perched monitoring well installed April,
2023 showing concentration in mg/L
temporary perched monitoring well
installed September, 2021 showing
concentration in mg/L
temporary perched nitrate monitoring
well installed April, 2021 showing
concentration in mg/L
temporary perched monitoring well
installed April, 2019 showing
concentration in µg/L
perched monitoring well showing
concentration in µg/L
temporary perched monitoring well
showing concentration in µg/L
temporary perched nitrate monitoring
well (not sampled)
perched piezometer (not sampled)
NS • MW-29
45 a
TWN-21
"' •
38 a
TWN-20
,i • MW-17
MW-38
f\!$ • MW-01
r.ls
Ubll Q.don•d ...
TWN-15
QDll.111lon&d
♦
TWN-10
•l><llldPnlld .
TWN-11
NS
♦
TWN-14
•IJQ,Qdoood • ♦
TWN-09
• MW-18
;-!S
♦
Tl{l'N-06 n
c,,tirm ~on ~
TWN-05
3j • MW-39
rti'
1 mile
)lband c11lftd • TWN~8
~L
TW4-05
-.
PIEZ-01
I.JS-• MW-19
o&;f'
TW4-38
o n TW4-12
os:,;
oi !; TW4-32 TW4-28 0 ,,,1
TW4-13
-~a Di•
W"°4 (A
s,. ~~tffl-oa °rw4-36 • ~4101 W-3)• _ U
• -""T.W4-04o°iw4-41a2].
+ • -..~•' • ~.. I YV 4-14
·TW~ ell o TW4-2UW441
'C.:S3 ft _9(6
TW4-~ ~~i
to ~9m,4-a
i ~p,TW4,®'"".
TW~
.. 1 • MW-40
N~ • MW-22
~
TWN-16
~-.1ncl~Md • TWN-12 "" • ♦ -
TWN-19
NOTES: MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-11, TW4-19, TW4-21, TW4-37, TW4-39, TW4-40 and TW4-41 are
chloroform pumping wells; TW4-22, TW4-24, TW4-25 and TWN-2 are nitrate pumping wells; MW-24A installed December, 2019
HY □R □
GED
CHEM, INC.
KRIGED 1st QUARTER, 2024 CHLORIDE (mg/L)
WHITE MESA SITE
APPROVED DATE REFERENCE FIGURE
H :/718000/may24/chloride/Ucl0324 .srf 1-2
TabJ
Analyte Concentrations over Time
Piezometer 1
Date Nitrate (mg/I) Chloride (mg/I)
2/19/2009 6.8 NA
7/14/2009 6.8 60.0
9/22/2009 7.3 78.0
10/27/2009 7.4 61.0
6/2/2010 7.2 52.0
7/19/2010 6.8 52.0
12/10/2010 6.5 60.0
1/31/2011 7 60.0
4/25/2011 6.8 58.0
7/25/2011 7 53.0
10/19/2011 6.6 55.0
1/11/2012 7.1 78.0
4/20/2012 6.6 58.0
7/27/2012 7.2 56.0
10/17/2012 7.66 55.0
2/18/2013 8.11 56.7
4/24/2013 8.88 53.3
8/28/2013 7.83 55.1
10/16/2013 6.68 54.1
1/13/2014 6.79 56.2
5/7/2014 7.57 52.1
8/6/2014 5.1 55.0
10/8/2014 5.75 57.6
2/18/2015 6.41 55.9
5/12/2015 5.95 57.5
8/26/2015 4.96 64.2
10/14/2015 6.17 54.4
2/23/2016 8.31 56.5
5/17/2016 6.33 59.1
7/19/2016 6.78 53.9
10/11/2016 6.42 58.1
2/15/2017 6.75 54.5
6/1/2017 6.60 54.7
7/20/2017 6.80 58.0
10/4/2017 6.21 54.4
1/17/2018 6.35 55.3
5/9/2018 6.56 58.0
8/8/2018 6.66 63.5
11/20/2018 6.70 55.5
2/19/2019 6.72 56.8
5/30/2019 6.75 59.4
8/14/2019 6.81 61.1
10/16/2019 7.21 59.3
1/30/2020 7.12 68.9
5/20/2020 6.95 67.7
Piezometer 1
Date Nitrate (mg/I) Chloride (mg/I)
7/15/2020 7.36 63.6
11/13/2020 7.51 63.9
2/18/2021 7.34 57.5
5/27/2021 7.89 69.9
8/19/2021 7.60 70.0
11/23/2021 4.69 65.5
2/16/2022 7.40 68.8
5/24/2022 5.90 70.3
8/17/2022 6.37 72.0
10/25/2022 6.36 73.6
2/21/2023 5.34 50.8
6/8/2023 5.90 65.1
7/19/2023 5.65 70.7
11/14/2023 6.74 72.7
2/15/2024 6.20 76.4
Piezometer 2
Date Nitrate (mg/I) Chloride (mg/I)
2/19/2009 0.500 NA
7/14/2009 0.500 7.0
9/22/2009 0.500 17.0
10/27/2009 0.600 7.0
6/2/2010 0.600 8.0
7/19/2010 0.600 8.0
12/10/2010 0.200 6.0
1/31/2011 0.300 9.0
4/25/2011 0.300 8.0
7/25/2011 0.100 9.0
10/19/2011 0.100 8.0
1/11/2012 0.100 9.0
4/20/2012 0.200 8.0
7/27/2012 0.200 9.0
10/17/2012 0.192 9.5
2/19/2013 0.218 9.7
4/24/2013 0.172 10.3
8/28/2013 0.198 9.7
10/16/2013 0.364 9.2
1/13/2014 0.169 11.4
5/7/2014 0.736 11.4
8/6/2014 0.800 12.0
10/8/2014 0.755 12.2
2/18/2015 0.749 12.6
5/12/2015 0.646 13.1
8/26/2015 0.662 15.5
10/14/2015 0.692 13.3
2/23/2016 0.615 13.4
5/17/2016 0.665 14.0
7/19/2016 0.669 12.4
10/11/2016 0.732 13.4
2/15/2017 0.696 12.4
6/1/2017 0.345 13.2
7/20/2017 0.555 13.4
10/4/2017 0.684 12.7
1/17/2018 0.716 13.0
5/9/2018 0.776 14.0
8/8/2018 0.818 15.1
11/20/2018 0.648 12.3
2/19/2019 0.599 12.9
5/30/2019 0.702 12.6
8/14/2019 0.606 13.2
10/16/2019 0.573 12.6
1/30/2020 0.740 14.2
5/20/2020 0.679 14.4
Piezometer 2
Date Nitrate (mg/I) Chloride (mg/I)
7/15/2020 0.793 12.7
11/13/2020 0.544 12.9
2/18/2021 0.401 15.7
5/27/2021 0.100 13.9
8/19/2021 0.110 14.6
11/23/2021 <0.100 14.8
2/16/2022 0.330 14.0
5/24/2022 0.480 12.6
8/17/2022 0.706 14.7
10/25/2022 0.703 13.4
2/21/2023 0.607 9.78
6/8/2023 0.680 12.8
7/19/2023 0.735 14.6
11/14/2023 0.920 14.0
2/15/2024 0.828 14.3
Piezometer 3A
Date Nitrate (mg/I) Chloride (mg/I)
5/17/2016 8.23 109
7/19/2016 8.83 93.8
10/11/2016 8.44 100
2/15/2017 10.00 111
6/1/2017 10.10 124
7/20/2017 9.31 105
10/4/2017 9.65 107
1/17/2018 8.61 94.3
5/9/2018 8.98 100
8/8/2018 12.1 122
11/20/2018 11.8 105
2/19/2019 11.8 102
5/30/2019 11.8 104
8/14/2019 10.7 96.2
10/16/2019 8.97 83.0
1/30/2020 10.5 99.5
5/20/2020 12.4 88.3
7/15/2020 12.8 82.7
11/13/2020 13.0 72.8
2/18/2021 11.1 85.9
5/27/2021 14.4 85.2
8/19/2021 11.2 81.5
11/23/2021 9.1 84.6
2/16/2022 12.1 91.7
5/24/2022 8.8 114
8/17/2022 10.6 109
10/25/2022 11.5 81.5
2/21/2023 11.9 60.8
6/8/2023 11.9 82.6
7/19/2023 12.8 77.3
11/14/2023 12.0 76.7
2/15/2024 13.3 80.5
TWN-1
Date Nitrate (mg/I) Chloride (mg/I)
2/6/2009 0.7 19
7/21/2009 0.4 17
9/21/2009 0.4 19
10/28/2009 0.5 18
3/17/2010 0.5 17
5/26/2010 0.6 20
9/27/2010 0.6 19
12/7/2010 0.6 14
1/26/2011 0.5 17
4/20/2011 0.5 19
7/26/2011 0.5 14
10/17/2011 0.5 10
1/9/2012 0.6 15
4/18/2012 0.6 17
7/24/2012 0.6 17
10/15/2012 0.432 17 .5
2/18/2013 0.681 17.6
4/23/2013 0.84 17.4
8/27/2013 1.24 24.1
10/16/2013 1.61 26.8
1/14/2014 1.47 29.2
5/6/2014 1.63 31.1
8/5/2014 1.7 28
10/8/2014 1.46 27.6
2/18/2015 1.37 27.8
5/13/2015 0.65 29.2
8/25/2015 0.324 33.2
10/13/2015 1.35 27.7
2/23/2016 1.51 30.3
5/17/2016 1.73 32.1
7/20/2016 1.76 29.6
10/6/2016 1.98 33.0
2/15/2017 2.06 31.2
6/1/2017 1.89 32.7
7/19/2017 2.07 31.2
10/4/2017 1.95 32.0
1/18/2018 1.86 30.4
5/8/2018 2.06 28.4
8/8/2018 1.97 34.2
11/20/2018 1.98 28.9
2/20/2019 2.10 31.4
5/29/2019 1.93 32.6
8/14/2019 2.15 30.3
10/16/2019 2.35 32.0
1/29/2020 2.24 33.8
TWN-1
Date Nitrate (mg/I) Chloride (mg/I)
5/20/2020 2.24 33.0
7/15/2020 2.36 30.8
11/12/2020 1.89 29.2
2/17/2021 2.53 34.1
5/25/2021 3.18 34.7
8/18/2021 2.47 35.7
11/23/2021 1.91 37.4
2/15/2022 3.01 35.6
5/24/2022 2.1 33.7
8/17/2022 2.94 36.7
10/25/2022 2.75 30.1
2/21/2023 1.96 30.8
6/8/2023 2.6 36.1
7/19/2023 2.46 35.3
11/14/2023 3.43 37.7
2/14/2024 2.67 36.4
TWN-2
Date Nitrate (mg/I) Chloride (mg/I)
2/6/2009 25.4 29
7/21/2009 25 25
9/21/2009 22.6 17
11/2/2009 20.8 55
3/24/2010 62.1 85
6/2/2010 69 97
9/29/2010 69 104
12/9/2010 48 93
2/1/2011 43 93
4/28/2011 40 85
7/28/2011 33 74
10/20/2011 33 76
1/12/2012 31 86
4/20/2012 48 103
7/31/2012 54 93
10/17/2012 22.1 79
2/19/2013 57.3 80.5
4/24/2013 57.7 82.1
8/27/2013 80 75.9
10/16/2013 111 70.4
1/13/2014 42.6 72.4
5/7/2014 44.7 84.9
8/6/2014 42 80
10/8/2014 70.6 81
2/18/2015 48.6 84.8
5/12/2015 52.8 82.6
8/25/2015 49.7 87.8
10/14/2015 44.9 74.9
2/23/2016 86.3 73.9
5/17/2016 45.4 74.5
7/19/2016 35.3 68.8
10/11/2016 32.6 69.8
2/15/2017 27.4 65.8
6/1/2017 25.0 61.5
7/20/2017 23.9 64.2
10/4/2017 31.9 60.5
1/19/2018 19.6 57.1
5/9/2018 19.8 62.3
8/8/2018 18.6 61.5
11/20/2018 19.6 56.0
2/19/2019 19.0 50.7
5/29/2019 45.1 102
8/14/2019 23.2 50.7
10/16/2019 18.2 53.0
1/29/2020 16.5 66.1
TWN-2
Date Nitrate (mg/I) Chloride (mg/I)
5/20/2020 16.1 59.6
7/15/2020 17.2 55.6
11/12/2020 12.0 53.5
2/18/2021 15.4 61.8
5/25/2021 13.8 61.5
8/18/2021 15.3 58.9
11/23/2021 12.7 62.3
2/15/2022 15.3 59.5
5/24/2022 14.0 60.2
8/17/2022 13.9 61.8
10/25/2022 14.0 48.9
2/21/2023 11.2 44.9
6/8/2023 13.6 49.7
7/19/2023 14.0 56.2
11/14/2023 14.6 63.0
2/14/2024 14.9 64.4
TWN-3
Date Nitrate (mg/I) Chloride (mg/I)
2/6/2009 23.6 96
7/21/2009 25.3 96
9/21/2009 27.1 99
11/2/2009 29 106
3/25/2010 25.3 111
6/3/2010 26 118
7/15/2010 27 106
12/10/2010 24 117
2/1/2011 24 138
4/28/2011 26 128
7/29/2011 25 134
10/20/2011 25 129
1/12/2012 25 143
4/20/2012 24 152
7/31/2012 27 158
10/17/2012 12.1 149
2/19/2013 22.2 157
4/24/2013 27.2 158
8/28/2013 20.9 171
10/17/2013 23.5 163
1/15/2014 19.6 160
5/7/2014 23.6 168
8/6/2014 19.5 174
10/9/2014 19.1 153
2/19/2015 19.4 164
5/14/2015 17.2 141
8/26/2015 16.2 156
10/14/2015 16.3 129
2/24/2016 16.8 128
5/18/2016 13.5 116
7/19/2016 16.8 110
10/7/2016 15.8 113
2/16/2017 17.4 113
6/2/2017 15.9 108
7/20/2017 15.9 106
10/5/2017 15.6 111
1/19/2018 14.4 107
5/9/2018 16.4 115
8/9/2018 19.4 149
11/21/2018 20.1 123
2/21/2019 20.7 140
5/30/2019 18.7 137
8/15/2019 19.8 133
10/17/2019 19.6 126
1/30/2020 19.4 156
TWN-3
Date Nitrate (mg/I) Chloride (mg/I)
5/21/2020 24.0 136
7/16/2020 22.2 130
11/13/2020 18.00 137
2/18/2021 23.8 145
5/27/2021 25.0 156
8/19/2021 24.3 146
11/24/2021 17.4 147
2/16/2022 25.3 140
5/25/2022 24.0 157
8/18/2022 28.2 163
10/26/2022 26.0 156
2/22/2023 28.0 109
6/9/2023 26.4 158
7/20/2023 26.1 160
11/15/2023 31.4 165
2/15/2024 33.5 176
TWN-4
Date Nitrate (mg/I) Chloride (mg/I)
2/6/2009 1.00 13.0
7/21/2009 0.05 12.0
9/21/2009 0.40 13.0
10/28/2009 0.40 11.0
3/16/2010 0.90 22.0
5/27/2010 1.00 22.0
9/27/2010 0.90 19.0
12/8/2010 1.00 21.0
1/25/2011 0.90 21.0
4/20/2011 0.90 21.0
7/26/2011 1.10 35.0
10/18/2011 0.90 20.0
1/9/2012 0.90 20.0
4/18/2012 1.10 24.0
7/25/2012 1.40 25.0
10/15/2012 1.45 26.4
2/18/2013 1.51 25.3
4/23/2013 1.63 24.4
8/27/2013 1.58 27.2
10/16/2013 1.69 29.4
1/14/2014 1.41 28.4
5/6/2014 1.55 29.6
8/5/2014 2.00 28.0
10/8/2014 1.44 30.7
2/18/2015 1.48 31.5
5/13/2015 0.73 31.9
8/25/2015 0.97 35.2
10/13/2015 1.58 28.4
2/23/2016 2.02 30.7
5/17/2016 2.97 31.7
7/20/2016 3.14 28.0
10/6/2016 3.09 31.3
2/15/2017 2.63 31.2
6/1/2017 2.37 28.6
7/19/2017 2.35 28.0
10/4/2017 2.27 27.4
1/18/2018 1.77 26.3
5/8/2018 1.86 27.7
8/8/2018 1.54 28.0
11/20/2018 1.48 22.7
2/20/2019 1.53 25.3
5/29/2019 1.51 26.5
8/14/2019 1.81 23.7
10/16/2019 2.15 25.4
1/29/2020 1.89 27.2
TWN-4
Date Nitrate (mg/I) Chloride (mg/I)
5/20/2020 1.75 25.1
7/15/2020 1.75 23.1
11/12/2020 1.18 22.8
2/17/2021 1.64 24.2
5/25/2021 1.70 23.2
8/18/2021 1.28 23.7
11/23/2021 1.27 23.2
2/15/2022 1.50 22.7
5/24/2022 1.20 20.9
8/17/2022 1.39 21.6
10/25/2022 1.31 21.2
2/21/2023 0.904 12.2
6/8/2023 1.21 15.9
7/19/2023 1.08 17.6
11/14/2023 2.29 21.3
2/14/2024 1.25 21.8
TWN-7
Date Nitrate (mg/I) Chloride (mg/I)
8/25/2009 ND 11.00
9/21/2009 ND 7.00
11/10/2009 0.10 7.00
3/17/2010 0.800 6.00
5/28/2010 1.200 6.00
7/14/2010 1.600 7.00
12/10/2010 1.000 4.00
1/27/2011 1.300 6.00
4/21/2011 1.700 6.00
7/29/2011 0.700 5.00
10/19/2011 2.200 6.00
1/11/2012 2.300 5.00
4/20/2012 1.200 6.00
7/26/2012 0.900 6.00
10/16/2012 0.641 5.67
2/19/2013 0.591 5.68
4/24/2013 1.160 5.88
8/28/2013 0.835 6.96
10/16/2013 0.986 5.70
1/15/2014 0.882 5.75
5/7/2014 0.564 5.26
8/6/2014 0.900 6.00
10/9/2014 0.968 5.93
2/19/2015 1.040 5.58
5/14/2015 0.779 6.18
8/26/2015 0.348 6.12
10/14/2015 0.672 5.84
2/24/2016 0.240 6.06
5/18/2016 0.732 6.26
7/21/2016 0.810 5.97
10/7/2016 0.698 6.17
2/16/2017 1.63 14.00
6/2/2017 3.74 29.70
7/20/2017 2.70 29.00
10/5/2017 3.58 41.40
1/19/2018 5.82 69.40
5/9/2018 10.2 94.70
8/9/2018 10.6 105
11/21/2018 11.5 104
2/21/2019 12.9 107
5/30/2019 13.5 122
8/15/2019 12.9 120
10/17/2019 14.2 119
1/30/2020 14.2 128
5/21/2020 14.6 126
TWN-7
Date Nitrate (mg/I) Chloride (mg/I)
7/16/2020 15.2 116
11/13/2020 11.8 121
2/18/2021 16.0 129
5/27/2021 16.4 129
8/19/2021 15.1 121
11/24/2021 7.7 130
2/16/2022 16.9 120
5/25/2022 16.0 127
8/18/2022 14.6 128
10/26/2022 15.7 129
2/22/2023 14.5 150
6/9/2023 14.0 122
7/20/2023 13.7 124
11/15/2023 15.6 130
2/15/2024 17.5 133
TWN-18
Date Nitrate (mg/I) Chloride (mg/I)
11/2/2009 1.300 57.0
3/17/2010 1.600 42.0
6/1/2010 1.800 63.0
9/27/2010 1.800 64.0
12/9/2010 1.600 59.0
1/27/2011 1.400 61.0
4/26/2011 1.800 67.0
7/28/2011 1.800 65.0
10/18/2011 1.900 60.0
1/10/2012 1.900 64.0
4/19/2012 2.100 64.0
7/26/2012 2.300 67.0
10/16/2012 1.950 67.5
2/18/2013 2.270 68.7
4/23/2013 2.320 64.3
8/27/2013 2.040 70.4
10/16/2013 2.150 67.3
1/14/2014 2.330 68.4
5/6/2014 2.180 76.5
8/5/2014 1.800 70.0
10/8/2014 1.470 74.8
2/18/2015 1.000 73.3
5/13/2015 1.350 76.6
8/25/2015 0.350 81.3
10/13/2015 0.668 69.0
2/23/2016 0.648 67.6
5/17/2016 0.497 69.9
7/20/2016 0.100 52.7
10/6/2016 0.501 67.4
2/15/2017 0.470 62.1
6/1/2017 0.392 63.9
7/19/2017 0.419 59.0
10/4/2017 0.256 56.6
1/18/2018 0.332 53.1
5/8/2018 0.283 57.8
8/8/2018 0.348 59.7
11/20/2018 0.160 48.1
2/20/2019 0.155 46.4
5/29/2019 0.129 50.0
8/14/2019 0.181 46.9
10/16/2019 0.162 47.1
1/29/2020 0.224 51.9
5/20/2020 0.236 47.4
7/15/2020 0.232 44.0
11/12/2020 0.208 42.3
TWN-18
Date Nitrate (mg/I) Chloride (mg/I)
2/17/2021 0.228 46.2
5/25/2021 0.220 44.9
8/17/2021 0.199 42.9
11/23/2021 0.245 46.5
2/15/2022 0.199 40.9
5/25/2022 0.340 40.7
8/17/2022 0.328 40.8
10/25/2022 0.212 35.6
2/21/2023 0.253 33.2
6/8/2023 0.267 36.1
7/19/2023 <0.100 38.1
11/14/2023 0.340 38.1
2/14/2024 0.139 39.3
TWN-20
Date Nitrate (mg/I) Chloride (mg/I)
6/3/2021 1.880 50.0
8/19/2021 0.960 35.3
11/24/2021 0.286 33.6
2/16/2022 0.436 31.2
5/25/2022 0.540 29.7
8/18/2022 0.481 32.4
10/26/2022 0.446 32.0
2/22/2023 0.356 23.2
6/9/2023 0.363 22.0
7/20/2023 0.330 33.4
11/15/2023 0.370 34.8
2/15/2024 0.323 35.9
TWN-21
Date Nitrate (mg/I) Chloride (mg/I)
6/3/2021 1.03 4'1.9
8/19/2021 1.16 40.5
11/24/2021 0.696 42.6
2/16/2022 1.10 40.4
5/25/2022 1.1 39.8
8/18/2022 1.19 42.7
10/26/2022 1.08 42.3
2/22/2023 1.02 27.5
6/9/2023 1.03 29.8
7/20/2023 1.01 42.8
11/15/2023 1.10 43.8
2/15/2024 1.11 44.9
TW4-19
Date Nitrate (mg/I) Date Chloride (mg/I)
7/22/2002 42.80 12/7/2005 81
9/12/2002 47.60 3/9/2006 86
3/28/2003 61.40 7/20/2006 123
6/23/2003 11.40 11/9/2006 134
7/15/2003 6.80 2/28/2007 133
8/15/2003 4.00 8/15/2007 129
9/12/2003 5.70 10/10/2007 132
9/25/2003 9.20 3/26/2008 131
10/29/2003 7.70 6/25/2008 128
11/9/2003 4.80 9/10/2008 113
8/16/2004 9.91 10/15/2008 124
9/17/2004 4.50 3/4/2009 127
3/16/2005 5.30 6/23/2009 132
6/7/2005 5.70 9/14/2009 43
8/31/2005 4.60 12/14/2009 124
12/1/2005 0.10 2/17/2010 144
3/9/2006 4.00 6/9/2010 132
6/14/2006 5.20 8/16/2010 142
7/20/2006 4.30 10/11/2010 146
11/9/2006 4.60 2/17/2011 135
2/28/2007 4.00 6/7/2011 148
8/15/2007 4.10 8/17/2011 148
10/10/2007 4.00 11/17/2011 148
3/26/2008 2.20 1/23/2012 138
6/25/2008 2.81 6/6/2012 149
9/10/2008 36.20 9/5/2012 149
10/15/2008 47.80 10/3/2012 150
3/4/2009 3.20 2/11/2013 164
6/23/2009 2.40 6/5/2013 148
9/14/2009 0.10 9/3/2013 179
12/14/2009 26.70 10/29/2013 206
2/17/2010 2.00 1/27/2014 134
6/9/2010 4.40 5/19/2014 152
8/16/2010 5.90 8/11/2014 140
10/11/2010 2.70 10/21/2014 130
2/17/2011 17.00 3/9/2015 238
6/7/2011 12.00 6/8/2015 180
8/17/2011 3.00 8/31/2015 326
11/17/2011 5.00 10/19/2015 252
1/23/2012 0.60 3/9/2016 276
6/6/2012 2.40 5/23/2016 201
9/5/2012 2.50 7/25/2016 214
10/3/2012 4.10 10/13/2016 200
2/11/2013 7.99 3/8/2017 461
6/5/2013 2.95 6/13/2017 135
TW4-19
Date Nitrate (mg/I) Date Chloride (mg/I)
9/3/2013 17.60 7/26/2017 218
10/29/2013 4.70 10/11/2017 139
1/27/2014 1.62 3/12/2018 193
5/19/2014 1.34 6/8/2018 138
8/11/2014 1.60 8/22/2018 166
10/21/2014 4.72 11/28/2018 140
3/9/2015 8.56 3/8/2019 197
6/8/2015 0.92 6/5/2019 160
8/31/2015 11.60 9/4/2019 153
10/19/2015 10.60 12/10/2019 147
3/9/2016 15.70 2/19/2020 205
5/23/2016 1.27 5/27/2020 147
7/25/2016 10.50 9/4/2020 188
10/13/2016 10.00 10/28/2020 104
3/8/2017 11.10 2/23/2021 167
6/13/2017 0.243 6/9/2021 115
7/26/2017 1.12 8/24/2021 172
10/11/2017 0.377 12/1/2021 184
3/12/2018 8.61 3/9/2022 119
6/8/2018 0.494 6/8/2022 128
8/22/2018 2.55 8/30/2022 178
11/28/2018 0.233 11/30/2022 129
3/8/2019 6.58 3/7/2023 122
6/5/2019 8.96 6/13/2023 167
9/4/2019 0.332 8/9/2023 122
12/10/2019 0.535 11/29/2023 120
2/19/2020 10.10 2/21/2024 126
5/27/2020 1.14
9/4/2020 11.60
10/28/2020 1.10
2/23/2021 6.61
6/9/2021 4.04
8/24/2021 6.68
12/1/2021 11.0
3/9/2022 1.70
6/8/2022 1.40
8/30/2022 4.76
11/30/2022 3.58
3/7/2023 1.75
6/13/2023 6.68
8/9/2023 1.57
11/29/2023 1.14
2/21/2024 0.98
1W4-19
Date Nitrate (mg/I) Date Chloride (mg/I)
The sampling program for 1W4-19 was updated in the fourth quarter of 2005
to include analysis for chloride as well as nitrate. This change accounts for the
different number of data points represented above.
TW4-21
Date Nitrate (mg/I) Date Chloride (mg/I)
5/25/2005 14.6 12/7/2005 353
8/31/2005 10.1 3/9/2006 347
11/30/2005 9.6 7/20/2006_ 357
3/9/2006 8.5 11/8/2006 296
6/14/2006 10.2 2/28/2007 306
7/20/2006 8.9 6/27/2007 327
11/8/2006 8.7 8/15/2007 300
2/28/2007 8.7 10/10/2007 288
6/27/2007 8.6 3/26/2008 331
8/15/2007 8.6 6/25/2008 271
10/10/2007 8.3 9/10/2008 244
3/26/2008 14.3 10/15/2008 284
6/25/2008 8.8 3/11/2009 279
9/10/2008 7.6 6/24/2009 291
10/15/2008 8.0 9/15/2009 281
3/11/2009 8.3 12/22/2009 256
6/24/2009 8.1 2/25/2010 228 .
9/15/2009 9.2 6/10/2010 266
12/22/2009 8.4 8/12/2010 278
2/25/2010 8.4 10/13/2010 210
6/10/2010 12.0 2/22/2011 303
8/12/2010 14.0 6/1/2011 297
10/13/2010 7.0 8/17/2011 287
2/22/2011 9.0 11/16/2011 276
6/1/2011 13.0 1/19/2012 228
8/17/2011 14.0 6/13/2012 285
11/16/2011 13.0 9/13/2012 142
1/19/2012 15.0 10/4/2012 270
6/13/2012 11.0 2/13/2013 221
9/13/2012 13.0 6/18/2013 243
10/4/2012 14.0 9/12/2013 207
2/13/2013 11.8 11/13/2013 206
6/18/2013 13.8 2/5/2014 200
9/12/2013 10.3 5/22/2014 243
11/13/2013 9.0 8/27/2014 230
2/5/2014 11.4 10/29/2014 252
5/22/2014 11.5 3/12/2015 255
8/27/2014 7.1 6/8/2015 494
10/29/2014 10.0 8/31/2015 499
TW4-21
Date Nitrate (mg/I) Date Chloride (mg/I)
3/12/2015 10.9 10/19/2015 413
6/8/2015 13.1 3/9/2016 452
8/31/2015 14.7 5/23/2016 425
10/19/2015 14.3 7/25/2016 457
3/9/2016 14.6 10/12/2016 439
5/23/2016 13.1 3/8/2017 478
7/25/2016 16.5 6/13/2017 309
10/12/2016 13.5 7/26/2017 447
3/8/2017 17.7 10/11/2017 378
6/13/2017 9.5 3/12/2018 447
7/26/2017 18.2 6/8/2018 387
10/11/2017 16.9 8/22/2018 182
3/12/2018 15.8 10/22/2018 392
6/8/2018 14.1 3/8/2019 180
8/22/2018 0.236 6/5/2019 456
10/22/2018 15.2 9/4/2019 478
3/8/2019 8.99 12/10/2019 339
6/5/2019 17.5 2/19/2020 446
9/4/2019 14.7 5/27/2020 353
12/10/2019 5.73 9/4/2020 382
2/19/2020 8.93 10/28/2020 411
5/27/2020 15.4 2/23/2021 454
9/4/2020 12.6 6/9/2021 461
10/28/2020 16.3 8/24/2021 375
2/23/2021 15.2 12/1/2021 227
6/9/2021 21.5 3/9/2022 110
8/24/2021 12.9 6/8/2022 331
12/1/2021 17.2 8/30/2022 425
3/9/2022 2.2 11/30/2022 158
6/8/2022 8.9 3/7/2023 335
8/30/2022 14.3 6/13/2023 397
11/30/2022 2.1 8/9/2023 161
3/7/2023 10.9 11/29/2023 372
6/13/2023 17.3 2/21/2024 129
8/9/2023 6.13
11/29/2023 9.41
2/21/2024 3.76
The sampling program for TW4-21 was updated in the fourth quarter of 2005
to include analysis for chloride as well as nitrate. This change accounts for the
different number of data points represented above.
TW4-22
Date Nitrate (mg/I) Chloride (mg/I)
2/28/2007 20.9 347
6/27/2007 19.3 273
8/15/2007 19.3 259
10/10/2007 18.8 238
3/26/2008 39.1 519
6/25/2008 41.9 271
9/10/2008 38.7 524
10/15/2008 36.3 539
3/11/2009 20.7 177
6/24/2009 20.6 177
9/15/2009 40.3 391
12/29/2009 17.8 175
3/3/2010 36.6 427
6/15/2010 19 134
8/12/2010 18 127
8/24/2010 15 130
10/13/2010 16 134
2/23/2011 18 114
6/1/2011 17 138
8/17/2011 15 120
11/16/2011 19 174
1/19/2012 14 36
6/13/2012 12.8 35
9/12/2012 7 121
10/4/2012 14 130
2/11/2013 58 635
6/5/2013 50.2 586
9/3/2013 29.7 487
10/29/2013 45.2 501
1/27/2014 54.6 598
5/19/2014 47.2 614
8/11/2014 41.5 540
10/21/2014 54.9 596
3/9/2015 69.2 675
6/8/2015 47.1 390
8/31/2015 64.7 557
10/19/2015 56.1 567
3/9/2016 31.1 583
5/23/2016 58.4 598
7/25/2016 61.3 619
10/12/2016 61.5 588
3/8/2017 69.8 566
6/13/2017 70.8 572
7/26/2017 66.1 391
10/11/2017 80.1 600
3/12/2018 62.3 607
6/8/2018 72.5 580
TW4-22
Date Nitrate (mg/I) Chloride (mg/I)
8/22/2018 55.4 613
11/28/2018 75.7 567
3/8/2019 71.9 528
6/5/2019 83.9 662
9/4/2019 72.5 588
12/10/2019 59.9 608
2/19/2020 57.7 606
5/27/2020 60.5 578
9/4/2020 64.8 514
10/28/2020 64.9 523
2/23/2021 69.6 618
6/9/2021 89.3 408
8/24/2021 35.1 410
12/1/2021 68.8 586
3/9/2022 40.4 442
6/8/2022 45 564
8/30/2022 69.9 637
11/30/2022 62.0 601
3/7/2023 49.1 562
6/13/2023 49.8 596
8/9/2023 58.8 617
11/29/2023 42.9 577
2/21/2024 53.9 489
TW4-24
Date Nitrate (mg/I) Chloride (mg/I)
6/27/2007 26.1 770
8/15/2007 29 791
10/10/2007 24.7 692
3/26/2008 24.4 740
6/25/2008 45.3 834
9/10/2008 38.4 1180
10/15/2008 44.6 1130
3/4/2009 30.5 1010
6/24/2009 30.4 759
9/15/2009 30.7 618
12/17/2009 28.3 1080
2/25/2010 33.1 896
6/9/2010 30 639
8/11/2010 32 556
8/24/2010 31 587
10/6/2010 31 522
2/17/2011 31 1100
5/26/2011 35 1110
8/17/2011 34 967
11/16/2011 35 608
1/18/2012 37 373
6/6/2012 37 355
8/30/2012 37 489
10/3/2012 38 405
2/11/2013 35.9 1260
6/5/2013 23.7 916
9/3/2013 32.6 998
10/29/2013 34.6 1030
1/27/2014 31.6 809
5/19/2014 35 1020
8/11/2014 31.5 1150
10/21/2014 35.7 1050
3/9/2015 34.6 944
6/8/2015 31.8 1290
8/31/2015 25.3 788
10/19/2015 29.6 909
3/9/2016 29.1 989
5/23/2016 24.2 771
7/25/2016 34.4 1,180
10/12/2016 31.9 1,010
3/8/2017 41.3 1,090
6/13/2017 39.9 1,080
7/26/2017 40.0 1,230
10/11/2017 31.7 895
3/12/2018 44.9 1,320
6/14/2018 33.6 792
8/22/2018 33.8 996
11/28/2018 38.4 1,100
3/8/2019 39.3 1,040
6/5/2019 33.2 1,020
9/4/2019 36.4 1,130
TW4-24
Date Nitrate (mg/I) Chloride (mg/I)
12/10/2019 33.8 1,090
2/19/2020 37.1 1,010
5/27/2020 41.7 1,060
9/4/2020 39.1 1,100
10/28/2020 35.9 1,050
2/23/2021 41.9 1,170
6/9/2021 48.0 938
8/24/2021 26.7 1,010
12/1/2021 43.6 1,140
3/9/2022 36.2 890
6/8/2022 35.0 944
8/30/2022 32.0 868
11/30/2022 27.6 972
3/7/2023 36.2 932
6/13/2023 35.9 866
8/9/2023 58.8 617
11/29/2023 16.9 757
2/21/2024 40.6 1,130
TW4-25
Date Nitrate (mg/I) Chloride (mg/I)
6/27/2007 17.1 395
8/15/2007 16.7 382
10/10/2007 17 356
3/26/2008 18.7 374
6/25/2008 22.1 344
9/10/2008 18.8 333
10/15/2008 21.3 366
3/4/2009 15.3 332
6/24/2009 15.3 328
9/15/2009 3.3 328
12/16/2009 14.2 371
2/23/2010 14.4 296
6/8/2010 16 306
8/10/2010 14 250
10/5/2010 15 312
2/16/2011 15 315
5/25/2011 16 321
8/16/2011 16 276
11/15/2011 16 294
1/18/2012 16 304
5/31/2012 16 287
9/11/2012 17 334
10/3/2012 17 338
2/11/2013 9.04 190
6/5/2013 5.24 136
9/3/2013 5.69 119
10/29/2013 6.10 88.6
1/27/2014 2.16 85.7
5/19/2014 1.21 51.1
8/11/2014 1.6 67
10/21/2014 1.03 58.1
3/9/2015 14.4 310
6/8/2015 1.14 58.3
8/31/2015 1.63 69.2
10/21/2015 1.78 93.7
3/9/2016 0.837 62.7
5/23/2016 0.959 75.5
7/25/2016 1.78 74.1
10/12/2016 1.24 59.8
3/8/2017 17.0 285
6/13/2017 0.976 69.8
7/26/2017 1.23 70.1
10/11/2017 1.29 68.0
3/12/2018 2.23 70.5
6/14/2018 1.14 60.3
TW4-25
Date Nitrate (mg/I) Chloride (mg/I)
8/22/2018 0.810 69.1
11/28/2018 0.634 59.7
3/8/2019 0.639 65.0
6/5/2019 0.821 59.0
9/4/2019 0.548 58.1
12/10/2019 0.841 73.1
2/19/2020 0.607 86.0
5/27/2020 0.851 76.8
9/4/2020 0.994 67.3
10/28/2020 1.64 61.3
2/23/2021 3.43 100
6/9/2021 1.57 55.1
8/24/2021 0.793 69.3
12/1/2021 0.978 93.7
3/9/2022 1.8 70.3
6/8/2022 0.88 72.8
8/30/2022 1.51 82.5
11/30/2022 1.47 67.2
3/7/2023 1.96 96.7
6/13/2023 1.03 73.0
8/9/2023 0.79 79.9
11/29/2023 0.480 70.4
2/21/2024 0.581 74.3
MW-30
Date Nitrate (mg/I) Date Chloride (mg/I)
6/22/2005 12.4 6/22/2005 125
9/22/2005 12.8 9/22/2005 125
12/14/2005 13.6 12/14/2005 128
3/22/2006 13.8 3/22/2006 125
6/21/2006 14.5 6/21/2006 124
9/13/2006 14.1 9/13/2006 118
10/25/2006 14.6 10/25/2006 124
3/15/2007 14.4 3/15/2007 125
8/22/2007 14.6 8/22/2007 126
10/24/2007 14.9 10/24/2007 122
3/19/2008 14.8 3/19/2008 118
6/3/2008 18.7 6/3/2008 125
8/4/2008 17.3 8/4/2008 121
11/5/2008 15.6 11/5/2008 162
2/3/2009 15.3 2/3/2009 113
5/13/2009 15.1 5/13/2009 122
8/24/2009 20.9 8/24/2009 118
10/14/2009 15.0 10/14/2009 129
1/20/2010 15.4 1/20/2010 106
2/9/2010 16.1 2/9/2010 127
4/27/2010 15.8 4/27/2010 97
5/24/2010 17.0 9/14/2010 111
6/15/2010 15.3 11/9/2010 126
8/24/2010 16.0 2/1/2011 134
9/14/2010 15.0 4/11/2011 134
10/19/2010 15.0 5/10/2011 128
11/9/2010 15.0 6/20/2011 127
12/14/2010 16.0 7/5/2011 127
1/10/2011 15.0 8/3/2011 126
2/1/2011 16.0 9/7/2011 145
3/14/2011 17 .0 10/4/2011 129
4/11/2011 16.0 11/8/2011 122
5/10/2011 16.0 12/12/2011 124
6/20/2011 17.0 1/24/2012 124
7/5/2011 17.0 2/14/2012 126
8/3/2011 14.0 3/14/2012 128
9/7/2011 16.0 4/10/2012 128
10/4/2011 16.0 5/2/2012 124
11/8/2011 16.0 6/18/2012 131
12/12/2011 16.0 7/10/2012 128
MW-30
Date Nitrate (mg/I) Date Chloride (mg/I)
1/24/2012 17.0 8/7/2012 139
2/14/2012 17.0 9/19/2012 130
3/14/2012 18.0 10/23/2012 135
4/10/2012 17.0 11/13/2012 114
5/2/2012 16.0 12/26/2012 122
6/18/2012 15.0 1/23/2013 128
7/10/2012 17.0 2/26/2013 129
8/7/2012 18.0 3/20/2013 126
9/19/2012 16.0 4/17/2013 117
10/23/2012 16.2 5/15/2013 119
11/13/2012 18.5 6/25/2013 127
12/26/2012 17.2 7/10/2013 130
1/23/2013 19.2 8/20/2013 126
2/26/2013 21.4 9/18/2013 131
3/20/2013 14.3 10/22/2013 128
4/17/2013 16.8 11/20/2013 124
5/15/2013 18.8 12/18/2013 134
6/25/2013 16.1 1/8/2014 131
7/10/2013 17.6 2/25/2014 135
8/20/2013 16.4 3/11/2014 144
9/18/2013 16.9 4/23/2014 154
10/22/2013 19.7 5/14/2014 128
11/20/2013 19.5 6/3/2014 128
12/18/2013 20.7 7/29/2014 140
1/8/2014 20.3 8/20/2014 139
2/25/2014 18.4 9/9/2014 136
3/11/2014 21.3 10/7/2014 136
4/23/2014 18.3 11/10/2014 154
5/14/2014 17.9 12/10/2014 138
6/3/2014 19.4 1/21/2015 144
7/29/2014 15.6 2/4/2015 136
8/20/2014 13.8 3/3/2015 132
9/9/2014 16.8 4/8/2015 142
10/7/2014 11.0 5/12/2015 145
11/10/2014 16.2 6/24/2015 142
12/10/2014 17.1 7/7/2015 145
1/21/2015 19.5 8/11/2015 165
2/4/2015 14.9 9/15/2015 165
3/3/2015 17.3 10/7/2015 137
4/8/2015 17.0 11/11/2015 140
5/12/2015 16.1 12/9/2015 144
6/24/2015 15.8 1/20/2016 143
MW-30
Date Nitrate (mg/I) Date Chloride (mg/I)
7/7/2015 15.3 2/10/2016 145
8/11/2015 17.9 3/2/2016 142
9/15/2015 17.3 4/13/2016 144
10/7/2015 19.1 5/4/2016 139
11/11/2015 16.3 6/14/2016 142
12/9/2015 18.2 7/13/2016 137
1/20/2016 14.6 8/18/2016 150
2/10/2016 20.0 9/14/2016 146
3/2/2016 17.8 10/5/2016 148
4/13/2016 18.0 11/3/2016 143
5/4/2016 17.3 12/6/2016 158
6/14/2016 18.5 1/18/2017 150
7/13/2016 16.1 2/2/2017 150
8/18/2016 18.0 3/6/2017 250
9/14/2016 17.0 4/5/2017 146
10/5/2016 17.2 5/2/2017 146
11/3/2016 18.0 6/5/2017 153
12/6/2016 18.2 7/11/2017 160
1/18/2017 19.0 8/14/2017 173
2/2/2017 17.4 9/12/2017 149
3/6/2017 20.4 10/5/2017 153
4/5/2017 18.3 11/1/2017 156
5/2/2017 17.5 12/6/2017 159
6/5/2017 18.8 1/23/2018 152
7/11/2017 16.2 2/22/2018 158
8/14/2017 19.2 3/8/2018 167
9/12/2017 18.7 4/12/2018 145
10/5/2017 18.8 5/15/2018 174
11/1/2017 17.4 6/19/2018 169
12/6/2017 18.3 7/24/2018 177
1/23/2018 15.2 8/10/2018 170
2/22/2018 17.6 9/11/2018 183
3/8/2018 17.0 10/22/2018 140
4/12/2018 17.3 11/14/2018 166
5/15/2018 17.7 12/11/2018 154
6/19/2018 16.9 1/16/2019 157
7/24/2018 17.4 2/13/2019 167
8/10/2018 18.7 3/6/2019 160
9/11/2018 18.0 4/9/2019 138
10/22/2018 17.3 5/7/2019 175
11/14/2018 16.9 6/3/2019 165
12/11/2018 17.2 7/16/2019 181
MW-30
Date Nitrate (mg/I) Date Chloride (mg/I)
1/16/2019 17.9 8/6/2019 190
2/13/2019 18.2 9/24/2019 176
3/6/2019 16.2 10/8/2019 170
4/9/2019 18.5 11/13/2019 180
5/7/2019 17.9 12/4/2019 185
6/3/2019 15.8 1/15/2020 182
7/16/2019 19.3 2/5/2020 187
8/6/2019 15.8 3/11/2020 182
9/24/2019 17.9 4/6/2020 195
10/8/2019 18.2 5/6/2020 177
11/13/2019 17.2 6/3/2020 180
12/4/2019 17.8 7/6/2020 185
1/15/2020 16.4 8/11/2020 183
2/5/2020 17.8 9/1/2020 166
3/11/2020 19.0 10/13/2020 183
4/6/2020 18.1 11/17/2020 150
5/6/2020 18.6 12/8/2020 166
6/3/2020 18.3 1/11/2021 184
7/6/2020 18.4 2/10/2021 189
8/11/2020 21.1 3/9/2021 192
9/1/2020 18.3 4/14/2021 162
10/13/2020 16.8 5/11/2021 188
11/17/2020 13.4 6/8/2021 170
12/8/2020 12.0 7/29/2021 188
1/11/2021 17.7 8/9/2021 161
2/10/2021 14.3 9/8/2021 183
3/9/2021 17.0 10/19/2021 182
4/14/2021 17.7 11/17/2021 182
5/11/2021 18.6 12/14/2021 184
6/8/2021 17.0 1/17/2022 181
7/29/2021 20.6 2/9/2022 184
8/9/2021 16.5 3/7/2022 196
9/8/2021 15.4 4/20/2022 173
10/19/2021 14.3 5/4/2022 195
11/17/2021 18.0 6/7/2022 126
12/14/2021 18.6 7/13/2022 108
1/17/2022 14.5 8/9/2022 185
2/9/2022 13.6 9/20/2022 182
3/7/2022 16.6 10/13/2022 196
4/20/2022 17.0 11/9/2022 156
5/4/2022 15.0 12/13/2022 195
6/7/2022 11.0 1/25/2023 166
MW-30
Date Nitrate (mg/I) Date Chloride (mg/I)
7/13/2022 17.6 2/8/2023 173
8/9/2022 13.5 3/15/2023 199
9/20/2022 16.5 4/26/2023 202
10/13/2022 17.9 5/10/2023 181
11/9/2022 15.9 6/6/2023 203
12/13/2022 16.1 7/11/2023 205
1/25/2023 18.1 8/2/2023 204
2/8/2023 15.9 9/5/2023 186
3/15/2023 17.3 10/4/2023 197
4/26/2023 15.9 11/1/2023 211
5/10/2023 15.3 12/4/2023 204
6/6/2023 16.1 1/9/2024 197
7/11/2023 16.6 2/7/2024 194
8/2/2023 17.4 3/5/2024 207
9/5/2023 17.1
10/4/2023 16.9
11/1/2023 16.7
12/4/2023 17.4
1/9/2024 16.2
2/7/2024 17.2
3/5/2024 16.1
Under the groundwater sampling program, accelerated monitoring for
nitrate began in MW-30 prior to when the accelerated monitoring for
chloride began. This difference accounts for the different number of
data points represented above.
MW-31
Date Nitrate (mg/I) Date Chloride (mg/I)
6/22/2005 24.2 6/22/2005 139
9/22/2005 22.4 9/22/2005 136
12/14/2005 23.8 12/14/2005 135
3/22/2006 24.1 3/22/2006 133
6/21/2006 25.3 6/21/2006 138
9/13/2006 24 .6 9/13/2006 131
10/25/2006 25.1 10/25/2006 127
3/15/2007 23.2 3/15/2007 132
3/15/2007 22.0 3/15/2007 132
8/27/2007 23.3 8/27/2007 136
10/24/2007 24.6 10/24/2007 122
3/19/2008 25 .0 3/19/2008 124
6/3/2008 29.3 6/3/2008 128
8/4/2008 28.7 8/4/2008 124
11/11/2008 29.9 11/11/2008 119
2/3/2009 23.4 2/3/2009 115
5/13/2009 22.4 5/13/2009 124
8/24/2009 15.4 8/24/2009 122
10/14/2009 22.6 10/14/2009 138
2/9/2010 21.7 2/9/2010 128
4/20/2010 22.5 4/20/2010 128
5/21/2010 23.0 9/13/2010 139
6/15/2010 21 .1 11/9/2010 138
8/24/2010 22.0 2/1/2011 145
9/13/2010 21.0 4/1/2011 143
10/19/2010 20.0 5/10/2011 143
11/9/2010 20.0 6/20/2011 145
12/14/2010 20.0 7/5/2011 148
1/10/2011 19.0 8/2/2011 148
2/1/2011 21.0 9/6/2011 148
3/14/2011 22 .0 10/3/2011 145
4/1/2011 21.0 11/8/2011 145
5/10/2011 20.0 12/12/2011 148
6/20/2011 22.0 1/24/2012 155
7/5/2011 22.0 2/13/2012 150
8/2/2011 20.0 3/13/2012 152
9/6/2011 21.0 4/9/2012 160
10/3/2011 21.0 5/2/2012 151
11/8/2011 21.0 6/18/2012 138
12/12/2011 21 .0 7/9/2012 161
MW-31
Date Nitrate (mg/I) Date Chloride (mg/I)
1/24/2012 21.0 8/6/2012 175
2/13/2012 21.0 9/18/2012 172
3/13/2012 22.0 10/22/2012 157
4/9/2012 21.0 11/6/2012 189
5/2/2012 20.0 12/18/2012 170
6/18/2012 21 .6 1/22/2013 176
7/9/2012 21.0 2/19/2013 174
8/6/2012 21.0 3/19/2013 168
9/18/2012 21.0 4/16/2013 171
10/22/2012 18.0 5/13/2013 169
11/6/2012 23.6 6/24/2013 179
12/18/2012 22.2 7/9/2013 182
1/22/2013 22.8 8/19/2013 183
2/19/2013 19.3 9/17/2013 193
3/19/2013 19.1 10/23/2013 188
4/16/2013 18.8 11/18/2013 174
5/13/2013 23.8 12/17/2013 203
6/24/2013 20.0 1/7/2014 194
7/9/2013 21.7 2/17/2014 197
8/19/2013 16.0 3/10/2014 230
9/17/2013 21.2 4/28/2014 230
10/23/2013 21.2 5/13/2014 200
11/18/2013 23 .9 6/2/2014 173
12/17/2013 24.2 7/28/2014 200
1/7/2014 24.0 8/18/2014 210
2/17/2014 20.6 9/3/2014 210
3/10/2014 26.2 10/6/2014 205
4/28/2014 19.1 11/4/2014 204
5/13/2014 23.3 12/9/2014 215
6/2/2014 23.1 1/20/2015 226
7/28/2014 19.0 2/2/2015 211
8/18/2014 15.2 3/3/2015 209
9/3/2014 18.9 4/7/2015 211
10/6/2014 15.9 5/11/2015 225
11/4/2014 20.9 6/23/2015 228
12/9/2014 17.0 7/6/2015 222
1/20/2015 20.9 8/10/2015 264
2/2/2015 18.7 9/15/2015 231
3/3/2015 19.8 10/6/2015 222
4/7/2015 19.0 11/9/2015 215
MW-31
Date Nitrate (mg/I) Date Chloride (mg/I)
5/11/2015 18.4 12/8/2015 231
6/23/2015 18.0 1/19/2016 228
7/6/2015 18.8 2/15/2016 246
8/10/2015 19.9 3/2/2016 228
9/15/2015 18.9 4/12/2016 254
10/6/2015 22.0 5/3/2016 243
11/9/2015 18.4 6/15/2016 252
12/8/2015 19.5 7/12/2016 241
1/19/2016 18.9 8/16/2016 272
2/15/2016 18.8 9/13/2016 254
3/2/2016 18.0 10/4/2016 260
4/12/2016 22.8 11/1/2016 267
5/3/2016 18.6 12/5/2016 274
6/15/2016 19.2 1/17/2017 287
7/12/2016 17.4 2/7/2017 266
8/16/2016 19.7 3/6/2017 250
9/13/2016 18.6 4/4/2017 263
10/4/2016 18.8 5/1/2017 263
11/1/2016 19.8 6/5/2017 278
12/5/2016 18.5 7/11/2017 254
1/17/2017 20.9 8/14/2017 310
2/7/2017 21.1 9/11/2017 248
3/6/2017 20.4 10/2/2017 287
4/4/2017 19.5 11/1/2017 292
5/1/2017 18.3 12/4/2017 285
6/5/2017 20.8 1/24/2018 323
7/11/2017 18.0 2/20/2018 292
8/14/2017 19.5 3/5/2018 311
9/11/2017 20.2 4/17/2018 308
10/2/2017 21.0 5/14/2018 326
11/1/2017 19.2 6/18/2018 359
12/4/2017 19.2 7/23/2018 351
1/24/2018 17.0 8/10/2018 336
2/20/2018 18.8 9/10/2018 333
3/5/2018 19.0 10/24/2018 286
4/17/2018 19.0 11/13/2018 281
5/14/2018 18.8 12/10/2018 302
6/18/2018 18.0 1/15/2019 283
7/23/2018 18.0 2/12/2019 296
8/10/2018 18.3 3/5/2019 322
MW-31
Date Nitrate (mg/I) Date Chloride (mg/I)
9/10/2018 20.1 4/10/2019 294
10/24/2018 18.3 5/7/2019 346
11/13/2018 17.9 6/3/2019 325
12/10/2018 18.3 7/15/2019 374
1/15/2019 19.0 8/5/2019 372
2/12/2019 18.6 9/23/2019 365
3/5/2019 18.5 10/9/2019 318
4/10/2019 19.7 11/12/2019 338
5/7/2019 18.9 12/3/2019 343
6/3/2019 19.7 1/14/2020 381
7/15/2019 19.8 2/4/2020 370
8/5/2019 17.0 3/10/2020 368
9/23/2019 19.5 4/6/2020 376
10/9/2019 19.8 5/5/2020 361
11/12/2019 18.8 6/2/2020 377
12/3/2019 18.3 7/7/2020 370
1/14/2020 17.5 8/10/2020 368
2/4/2020 18.0 9/1/2020 367
3/10/2020 19.2 10/19/2020 345
4/6/2020 18.8 11/16/2020 251
5/5/2020 20.1 12/7/2020 311
6/2/2020 18.7 1/12/2021 354
7/7/2020 19.2 2/9/2021 380
8/10/2020 21.6 3/8/2021 388
9/1/2020 18.4 4/13/2021 377
10/19/2020 18.6 5/10/2021 384
11/16/2020 16.5 6/7/2021 374
12/7/2020 18.8 7/27/2021 391
1/12/2021 17.1 8/9/2021 365
2/9/2021 14.3 9/7/2021 356
3/8/2021 17.4 10/19/2021 371
4/13/2021 18.6 11/15/2021 366
5/10/2021 18.9 12/13/2021 376
6/7/2021 20.6 1/19/2022 370
7/27/2021 18.7 2/8/2022 379
8/9/2021 15.7 3/7/2022 416
9/7/2021 16.0 4/11/2022 372
10/19/2021 18.1 5/3/2022 381
11/15/2021 19.3 6/6/2022 351
12/13/2021 17.9 7/12/2022 421
MW-31
Date Nitrate (mg/I) Date Chloride (mg/I)
1/19/2022 18.0 8/8/2022 369
2/8/2022 13.5 9/20/2022 390
3/7/2022 17.0 10/11/2022 397
4/11/2022 18.0 11/8/2022 243
5/3/2022 13.0 12/13/2022 335
6/6/2022 13.0 1/24/2023 333
7/12/2022 16.9 2/7/2023 388
8/8/2022 16.8 3/14/2023 302
9/20/2022 17.1 4/24/2023 297
10/11/2022 17.0 5/9/2023 388
11/8/2022 16.0 6/5/2023 397
12/13/2022 12.6 7/10/2023 429
1/24/2023 18.7 8/1/2023 404
2/7/2023 16.5 9/6/2023 417
3/14/2023 17.9 10/3/2023 396
4/24/2023 14.3 11/6/2023 407
5/9/2023 15.4 12/13/2023 408
6/5/2023 16.4 1/10/2024 397
7/10/2023 16.6 2/6/2024 377
8/1/2023 17.5 3/6/2024 411
9/6/2023 16.8
10/3/2023 17.0
11/6/2023 18.0
12/13/2023 17.2
1/10/2024 17.1
2/6/2024 18.1
3/6/2024 16.7
Under the groundwater sampling progran, accelerated monitoring
for nitrate began in MW-31 prior to when the accelerated
monitoring for chloride began. This difference accounts for the
different number of data points represented above.
TabK
Concentration Trend Graphs
Ill H-das
C:
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ci ci ci ci
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1/Bw
0
12/1/2005
6/1/2006
12/1/2006
6/1/2007
12/1/2007
6/1/2008
12/1/2008
6/1/2009
12/1/2009
6/1/2010
12/1/2010
6/1/2011
12/1/2011
6/1/2012
12/1/2012
6/1/2013
12/1/2013
6/1/2014
12/1/2014
6/1/2015
12/1/2015
6/1/2016
12/1/2016
6/1/2017
12/1/2017
6/1/2018
12/1/2018
6/1/2019
12/1/2019
6/1/2020
12/1/2020
6/1/2021
12/1/2021
6/1/2022
12/1/2022
6/1/2023
V,
0
I-'
0
0
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V,
0
N
0
0
mg/L
N
V,
0
w
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12/1/2023
6/1/2024 7
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12/1/2005
6/1/2006
12/1/2006
6/1/2007
12/1/2007
6/1/2008
12/1/2008
6/1/2009
12/1/2009
6/1/2010
12/1/2010
6/1/2011
12/1/2011
6/1/2012
12/1/2012
6/1/2013
12/1/2013
6/1/2014
12/1/2014
6/1/2015
12/1/2015
6/1/2016
12/1/2016
6/1/2017
12/1/2017
6/1/2018
12/1/2018
6/1/2019
12/1/2019
6/1/2020
12/1/2020
6/1/2021
12/1/2021
6/1/2022
12/1/2022
6/1/2023
12/1/2023
6/1/2024
0
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0
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N
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-t =: .,::..
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N ......
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tD
n
0 ::::,
n
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rl'
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"'
TW4-22 Nitrate Concentrations
100
90
80
70
60
...
~ 50
E
40
30
20
10
0
S'-f;:)'b f;:)o, ~(:)
~(;j ~ ~(;j ~(:)
v-'\,'b v-,fi v-'\,'b v-'\,'b
y ~ ◊ ~ ~ ~ y ~ ~ ~ w ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ # ~ # # # ~ # # # ~ # # # ~
0
2/28/2007
8/31/2007
2/29/2008
8/31/2008
2/28/2009
8/31/2009
2/28/2010
8/31/2010
2/28/2011
8/31/2011
2/29/2012
8/31/2012
2/28/2013
8/31/2013
2/28/2014
8/31/2014
2/28/2015
8/31/2015
2/29/2016
8/31/2016
2/28/2017
8/31/2017
2/28/2018
8/31/2018
2/28/2019
8/31/2019
2/29/2020
8/31/2020
2/28/2021
8/31/2021
2/28/2022
8/31/2022
2/28/2023
8/31/2023
I-'
0
0
N
0
0
w
0
0
mg/L
~
0
u,
0
0
en
0
0
-..J
0
0
00
0
0
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I
N
N
n :::r -0
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n
0 ::::,
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f! ..,
C a,
u
C
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a, ..,
f! .., ·-
6/27/2007
10/10/2007
6/25/2008
10/15/2008
6/24/2009
12/17/2009
6/9/2010
8/24/2010
2/17/2011
8/17/2011
1/18/2012
8/30/2012
2/11/2013
9/3/2013
1/27/2014
8/11/2014
3/9/2015
8/31/2015
3/9/2016
7/25/2016
3/8/2017
7/26/2017
3/12/2018
8/22/2018
3/8/2019
9/4/2019
2/19/2020
9/4/2020
2/23/2021
8/24/2021
3/9/2022
8/30/2022
3/7/2023
8/9/2023
2/21/2024
N a a a
.i:,. a a
en a a
mg/L
00 a a
..... a a a
.....
N a a
.....
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-I
~ .,:=.
I
N .,:=.
n ::::r -0
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n
0
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::::::s
V,
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TW4-25 Nitrate Concentrations
25
20
15
10
5
0
& ~ ~ ~ y y ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
....
~
E
450
400
350
300
250
200
150
100
so
0
TW4-25 Chloride Concentrations
~ ~ ~ ~ y y ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~v ~v ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
0
0
6/22/2005 _,
6/21/2006
8/22/2007
8/4/2008
8/24/2009
4/27/2010
9/14/2010
1/10/2011
5/10/2011
9/7/2011
1/24/2012
5/2/2012
9/19/2012
1/23/2013
5/15/2013
9/18/2013
1/8/2014
5/14/2014
9/9/2014
1/21/2015
5/12/2015
9/15/2015
1/20/2016
5/4/2016
9/14/2016
1/18/2017
5/2/2017
9/12/2017
1/23/2018
5/15/2018
9/11/2018
1/16/2019
5/7/2019
9/24/2019
1/15/2020
5/6/2020
9/1/2020
1/11/2021
5/11/2021
9/8/2021
1/17/2022
5/4/2022
9/20/2022
1/25/2023
5/10/2023
9/5/2023
1/9/2024
V,
0
I-'
0
0
mg/L
I-'
V,
0
N
0
0
N
V,
0
s
:E
I w
0
z ;::;:
cl ,...
tD -3
(rQ ........ --
mg/L .... .... u, 0 u,
0 0 0 0
6/1/2005
12/1/2005
6/1/2006
12/1/2006
6/1/2007
12/1/2007
6/1/2008
12/1/2008
6/1/2009
12/1/2009
6/1/2010
12/1/2010
6/1/2011
12/1/2011
6/1/2012
12/1/2012
6/1/2013
12/1/2013
6/1/2014
12/1/2014
6/1/2015
12/1/2015
6/1/2016
12/1/2016
6/1/2017
12/1/2017
6/1/2018
12/1/2018
6/1/2019
12/1/2019
6/1/2020
12/1/2020
6/1/2021
12/1/2021
6/1/2022
12/1/2022
6/1/2023
12/1/2023
I'-) I'-) OJ
0 u, 0
0 0 0
s
=E
I w
0
n :::r -0
""I -· Q.
tD -3
OQ -:::::, -
6/1/2005
12/1/2005
6/1/2006
12/1/2006
6/1/2007
12/1/2007
6/1/2008
12/1/2008
6/1/2009
12/1/2009
6/1/2010
12/1/2010
6/1/2011
12/1/2011
6/1/2012
12/1/2012
6/1/2013
12/1/2013
6/1/2014
12/1/2014
6/1/2015
12/1/2015
6/1/2016
12/1/2016
6/1/2017
12/1/2017
6/1/2018
12/1/2018
6/1/2019
12/1/2019
6/1/2020
12/1/2020
6/1/2021
12/1/2021
6/1/2022
12/1/2022
6/1/2023
12/1/2023
6/1/2024
12/1/2024
0 l/1
b b
....
0
b
....
l/1
b
mg/L
N
0
b
N
l/1
b
w
0
b
w
l/1
b
s:
~
I w
~
z -· r+
al r+
tD -3
(1Q
~ -
I-' I-'
V, 0 V,
0 0 0 0
6/1/2005
12/1/2005
6/1/2006
12/1/2006
6/1/2007
12/1/2007
6/1/2008
12/1/2008
6/1/2009
12/1/2009
6/1/2010
12/1/2010
6/1/2011
12/1/2011
6/1/2012
12/1/2012
6/1/2013
12/1/2013
6/1/2014
12/1/2014
6/1/2015
12/1/2015
6/1/2016
12/1/2016
6/1/2017
12/1/2017
6/1/2018
12/1/2018
6/1/2019
12/1/2019
6/1/2020
12/1/2020
6/1/2021
12/1/2021
6/1/2022
12/1/2022
6/1/2023
12/1/2023
N
0
0
mg/L
N
V,
0
w
0
0
w
V,
0
.i::,.
0
0
.i::,.
V,
0
V,
0
0
s
~
I w
i,-a,
n :::r -0 .., -· a.
tD
n
0 ::::, n
tD ::::,
"' al
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TabL
CSV Transmittal Letter
Kathy Weinel
From:
Sent:
To:
Cc:
Subject:
Attachments:
Dear Mr. Wingate,
Kathy Weinel
Monday, April 29, 2024 10:06 AM
Adam Wingate
'Dean Henderson'; [e-mail]; David Frydenlund; Scott Bakken; Garrin Palmer;
Logan Shumway; Jordan Christine App; Dawn Kolkman
Transmittal of CSV Files White Mesa Mill 2024 Q1 Nitrate Monitoring
24B1330 FINAL EnergyFuels-Client 27 Feb 24 1238.csv; Q1 2024 DTW all programs -
EIM.csv; Q1 2024 Field Data.csv
Attached to this e-mail is an electronic copy of laboratory results for Nitrate monitoring conducted at the
White Mesa Mill during the first quarter of 2024, in Comma Separated Value (CSV) format.
Please contact me at 303-389-4134 if you have any questions on this transmittal.
Yours Truly
Kathy Weinel
eF Energy Fuels Resources (USA) Inc.
Kathy Weinel
Director, Regulatory Compliance
t:303.389.4134 I c: I f:303.389.4125
[e-mail]
225 Union Blvd., Suite 600
Lakewood, CO 80228
http 'J/www_energyfuels .&om
This e-mail is intended for the exclusive use of the person(s) mentioned as the recipient(s). This message and any attached files with ii are confidential and may
contain privileged or proprietary information_ If you are not the intended recipient(s) please delete this message and notify the sender. You may not use, distribute
print or copy this message if you are not the intended recipient(s)_
1
TabM
Residual Mass Estimate Analysis Figure
Tab M -Figures
g
s ca
E ;
UI w
UI
UI ca
:ii
Ill
E ::s a:
s ca ...
;!:: z
45000 -,------------------------------------------------------,
40000 -i--..--------Jr-.----------------t~----------------------------------1
1--
35000
30000
25000 -1----------u-------------------------------------------4F'---l
20000 -....................... -.-........................... -.-............................. -.-........................... -.-............ -.-...... -.-.......................... _.-.......................... -.-............................. -.-............................. --...... --1
~~~~~~~~~~~~~~~~~~~~~#~~~~~~~####~~§§########~
'()'b~q;o' rc:o'l,rc:&> "Dd" '\io' '1io1-'Po-> ri;d" '\)o' '\)ol-'l)o-> 'l)d' '\)o"ri;:o1-'\y '\)d" roo.._'l)o'l,'l)&> ci;:d" 'l)o' "'c9' '\y 'l)d" 'l)o' rc:o'l,'l)<Y 'l)d' "'<>' ri;c9' ri;:& 'l)d' '\)<>' ri;:CY' 'l)& 'l)d' ri;o"'l,o.,,ri;& ri;:d" 'l)o' 'l)o'l,ri;:&> 'l)d" ri;:o' re:
-ptll~~u.n,n'Wl'Uto ---l.N1r,..ii#~~Jl..a u.i('iiinlt.t)
HYDRO
GEO
CHEM,INC. Approved
SJS
Time Series of Nitrate Plume Mass Estimates
Date Author Date File Name !Figure
Nmtrend 1024.xls M.1
https://hgcinc.sharepoint.comNOL4/718000/may24/nitrate/masscalc/Nmtrend1 Q24.xlsx: Fig M .1
Tab M -Tables
The Residual Mass Estimate Analysis Tables
Table M.1
Residual Nitrate Plume Mass
residual
plume
Quarter mass (lb)
baseline 43700
Q1 2013 41350
Q2 2013 34140
Q3 2013 36930
Q4 2013 41150
Q1 2014 31410
Q2 2014 30620
Q3 2014 24140
Q4 2014 34370
Q1 2015 38740
Q2 2015 33042
Q3 2015 34880
Q4 2015 30980
Q1 2016 33083
Q2 2016 28465
Q3 2016 32230
Q4 2016 31798
Q1 2017 43787
Q2 2017 32145
Q3 2017 32939
Q4 2017 31501
Q1 2018 33616
Q2 2018 31257
Q3 2018 25568
Q4 2018 28805
Q1 2019 29509
Q2 2019 31455
Q3 2019 30976
Q4 2019 29870
Q1 2020 32740
02 2020 30467
Q3 2020 35525
Q4 2020 25875
Q1 2021 35052
Q2 2021 34143
Q3 2021 28932
Q4 2021 28290
Q1 2022 27146
Q2 2022 31933
Q3 2022 29852
Q4 2022 27014
Q1 2023 30839
Q2 2023 28274
Q3 2023 25039
Q4 2023 25500
Q1 2024 29939
Notes:
lbs =pounds