DRC-2024-007628

November 19, 2024
Sent VlA EXPEDITED DELIVERY
Mr. Doug Hansen
Director
Div of Waste M
and Radiatio:~!~~:rnt
NOV 2 6 2024
Division o f Waste Management and Radiation Control
tah Department of nvironmental Quality
195 orth 1950 We t
Salt Lake City, UT 84116
Encrg} Fuel. Re ourcc I
22 . Union Blvd .
Lal-.cwoo<.l.
A) Inc.
uite 600
, 022~
303 974 21411
Re: Transmittal of 3rd Quarter 2024 Routine Chloroform Monitoring Report
DEQ Docket No. UGW-20-01 White Mesa ranium Mill
Dear Mr. Hansen:
Enclosed are two copies of the White Mesa Uranium Mill Chloroform Monitoring Report for the 3rd Quarter of
2024 as required by the Stipulation and Consent Order, UDEQ Docket No . UGW-20-01 as well as two CDs, that
each contains a word searchable electronic copy of the report .
lf you should have any questions regarding this report, please contact me .
Yours very truly ,
I<.~¼~
ENERGY FUELS RESOURCES (USA) {NC .
Kathy Weinel
Director, Regulatory Compliance
CC: David Frydenlund
Logan Shumway
Scott Bakk en
Garrin Palmer
Jordan App
Dawn Kolkman
DRC-2024-007628
:~£ I' r= ,J. r
,__,. 1 rJ 1
=it V ENERGYFUELS
November 19, 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
Energy Fuels Resources (USA) Inc.
225 Union Blvd. Suite 600
Lakewood, CO, US, 80228
303 974 2140
ww ,, .cner!!) fuels .com
Re: Transmittal of 3rd Quarter 2024 Routine Chloroform Monitoring Report
UDEQ Docket No. UGW-20-01 White Mesa Uranium Mill
Dear Mr. Hansen:
Enclosed are two copies of the White Mesa Uranium Mill Chloroform Monitoring Report for the 3rd Quarter of
2024 as required by the Stipulation and Consent Order, UDEQ Docket No. UGW-20-01 as well as two CDs, that
each contains a word searchable electronic copy of the report.
If you should have any questions regarding this report, please contact me.
Yours very truly,
;:.~¾~
ENERGY FUELS RESOURCES (USA) INC .
Kathy Weinel
Director, Regulatory Compliance
CC: David Frydenlund
Logan Shumway
Scott Bakken
Garrin Palmer
Jordan App
Dawn Kolkman
White Mesa Uranium Mill
Chloroform Monitoring Report
State of Utah
Stipulation and Consent Order Docket No. UGW-20-01
(July through September)
2024
Prepared by:
Energy Fuels Resources (USA) Inc.
225 Union Boulevard, Suite 600
Lakewood, CO 80228
November 19, 2024
TABLE OF CONTENTS
1.0 INTRODUCTION ................................................................................................. 1
2.0 CHLOROFORM MONITORING ....................................................................... !
2.1 Samples and Measurements Taken During the Quarter ...................................... 1
2.1.1 Chloroform Monitoring ............................................................................... 1
2.1.2 Parameters Analyzed ................................................................................... 2
2.1.3 Groundwater Head Monitoring .................................................................... 2
2.2 Sampling Methodology and Equipment and Decontamination Procedures ........ 3
2.2.1 Decontamination Procedures ....................................................................... 3
2.2.2 Well Purging and Depth to Groundwater ................................................... .4
2.2.3 Sample Collection ........................................................................................ 5
2.3 Field Data ............................................................................................................. 5
2.4 Depth to Groundwater Data and Water Table Contour Map ............................... 6
2.5 Laboratory Results ............................................................................................... 6
2.5.1 Copy of Laboratory Results ......................................................................... 6
2.5.2 Regulatory Framework ................................................................................ 6
3.0 QUALITY ASSURANCE AND DATA VALIDATION .................................... 6
3 .1 Field QC Samples ................................................................................................ 7
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 ..................................................................... 8
3.4.2 Holding Time Evaluation ............................................................................ 9
3.4.3 Receipt Temperature Evaluation ................................................................. 9
3.4.4 Analytical Method Checklist ....................................................................... 9
3.4.5 Reporting Limit Evaluation ......................................................................... 9
3 .4.6 Receipt pH Evaluation ............................................................................... 10
3 .4. 7 Trip Blank Evaluation ................................................................................ 10
3.4.8 QA/QC Evaluation for Sample Duplicates ................................................ 10
3.4.9 Rinsate Sample Check ............................................................................... 10
3 .4.10 Other Laboratory QA/QC .......................................................................... 11
4.0 INTERPRETATION OF DATA ........................................................................ 13
4.1 Interpretation of Groundwater Levels, Gradients and Flow Directions ............ 13
4.1.1 Current Site Groundwater Contour Map ................................................... 13
4.1.2 Comparison of Current Groundwater Contour Maps to Groundwater
Contour Maps for Previous Quarter ......................................................... 20
4.1.3 Hydro graphs .............................................................................................. 21
4.1.4 Depth to Groundwater Measured and Groundwater Elevation ................. 21
4.1.5 Evaluation of the Effectiveness of Hydraulic Capture ............................. 21
4.2 Review of Analytical Results ............................................................................ 27
4.2.1 Current Chloroform Isoconcentration Map ............................................... 27
4.2.2 Chloroform Concentration Trend Data and Graphs .................................. 27
4.2.3 Interpretation of Analytical Data ............................................................... 27
5.0 LONG TERM PUMP TEST AT MW-4, MW-26, TW4-19, TW4-20, AND
TW4-4 OPERATIONS REPORT ...................................................................... 31
5.1 Introduction ........................................................................................................ 31
5.2 Pump Test Data Collection ................................................................................ 32
5.3 Water Level Measurements ............................................................................... 32
5.4 Pumping Rates and Volumes ............................................................................. 33
5.4.1 TW4-22 and TW4-24 ................................................................................ 33
5.5 Mass Removed and Plume Residual Mass ........................................................ 33
5.6 Inspections ......................................................................................................... 34
5.7 Conditions That May Affect Water Levels in Piezometers ............................... 34
6.0 CORRECTIVE ACTION REPORT .................................................................. 34
6.1 Assessment of Previous Quarter's Corrective Actions ..................................... .34
7.0 CURRENT COMPLIANCE STATUS .............................................................. 35
7.1 Long Term Chloroform Plume Control.. .......................................................... .35
7.2 Well Construction, Maintenance and Operation ............................................... 36
7.3 Disposal of Extracted Groundwater ................................................................... 36
7.4 Compliance Well Performance .......................................................................... 36
7.5 Chloroform Plume Monitoring for Wells within 500 Feet of the Property
Boundary ........................................................................................................... 36
8.0 CONCLUSIONS AND RECOMMENDATIONS ............................................ 36
9.0 ELECTRONIC DATA FILES AND FORMAT ............................................... 43
10.0 SIGNATURE AND CERTIFICATION ............................................................ 44
LIST OF TABLES
Table 1 Summary of Wells Sampling for the Period
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 Weekly and Monthly Depth to Water Data
Tab D Kriged Current Quarter Groundwater Contour Map, Capture Zone Map, Capture
Zone Details Map and Depth to Water Data
Tab E Kriged Previous Quarter Groundwater Contour Map
Tab F Depths to Groundwater and Elevations and Hydro graphs of Groundwater
Elevations over Time for Chloroform Monitoring Wells
Tab G Chloroform Mass Removed and Volume Pumped in Chloroform Pumping Wells
over Time
Tab H Laboratory Analytical Reports
Tab I Quality Assurance and Data Validation Tables
1-1 Field Data QA/QC Evaluation
1-2 Holding Time Evaluation
1-3 Receipt Temperature Check
1-4 Analytical Method Check
1-5 Reporting Limit Evaluation
1-6 Trip Blank Evaluations
1-7 QA/QC Evaluation for Sample Duplicates
1-8 QC Control Limits for Analyses and Blanks
1-9 Rinsate Check
Tab J Kriged Current Quarter Chloroform lsoconcentration Map
Tab K Analyte Concentration Data and Chloroform Concentration Trend Graphs over
Time
Tab L Contour Map Based Chloroform Plume Mass Calculations and Data Over Time
Tab M CSV Transmittal Letter
Tab N Exceedance Notices for the Reporting Period
111
1.0 INTRODUCTION
The presence of chloroform was initially identified in groundwater at the White Mesa Mill (the
"Mill") as a result of split sampling performed in May 1999. The discovery resulted in the
issuance of State of Utah Notice of Violation ("NOV") and Groundwater Corrective Action
Order ("CAO") State of Utah Department of Environmental Quality ("UDEQ"), Division of
Waste Management and Radiation Control ("DWMRC") Docket No. UGW-20-01, which
required that Energy Fuels Resources (USA) Inc. ("EFRI") submit a Contamination Investigation
Plan and Report pursuant to the provisions of UAC R317-6-6.15(D). In response to the NOV,
EFRI submitted a series of documents outlining plans for investigation of the chloroform
contamination. This plan of action and preliminary schedule was set out in EFRI submittals
dated: September 20, 1999; June 30, 2000; April 14, 2005; and November 29, 2006. EFRI
submitted a draft Groundwater Corrective Action Plan ("GCAP") dated August 22, 2007. The
draft GCAP was reviewed by the Director, who advised EFRI in 2013 that modifications were
required. In an effort to expedite and formalize active and continued remediation of the
chloroform plume, both parties have agreed to the GCAP found in Attachment 1, of the final
Stipulation and Consent Order ("SCO") dated September 14, 2015.
This is the Quarterly Chloroform Monitoring Report for the third quarter of 2024 as required
under the SCO. This report also includes the Operations Report for MW-04, TW4-01, TW4-04,
TW4-02, TW4-11, TW4-19, TW4-21, MW-26, TW4-22, TW4-24, TW4-25, TW4-37, TW4-39,
TW 4-40, and TW 4-41 for the quarter.
2.0 CHLOROFORM MONITORING
2.1 Samples and Measurements Taken During the Quarter
A map showing the location of all groundwater monitoring wells, piezometers, existing wells,
temporary chloroform contaminant investigation wells and temporary nitrate investigation wells
is attached under Tab A. Chloroform samples and measurements taken during this reporting
period are discussed in the remainder of this section.
2.1.1 Chloroform Monitoring
Quarterly sampling for chloroform monitoring parameters is currently required in the following
wells:
MW-4 TW4-9 TW4-18 TW4-28 TW4-37
TW4-l TW4-10 TW4-19 TW4-29 TW4-38
TW4-2 TW4-l l TW4-21 TW4-30 TW4-39
TW4-3 TW4-12 TW4-22 TW4-31 TW4-40
TW4-4 TW4-13 TW4-23 TW4-32 TW4-41
TW4-5 TW4-14 TW4-24 TW4-33 TW4-42
TW4-6 MW-26 (formerly TW4-15) TW4-25 TW4-34 TW4-43
TW4-7 TW4-16 TW4-26 TW4-35
TW4-8 MW-32 (formerly TW 4-17) TW4-27 TW4-36
1
Chloroform monitoring was performed in all of the required chloroform monitoring wells. Table
I provides an overview of all wells sampled during the quarter, along with the date samples were
collected from each well, and the date(s) when analytical data were received from the contract
laboratory . Table 1 also identifies equipment rinsate samples collected, as well as sample
numbers associated with the deionized field blank ("DIFB") and any required duplicates.
2.1.2 Parameters Analyzed
Wells sampled during this reporting period were analyzed for the following constituents:
• Chloroform
• Chloromethane
• Carbon tetrachloride
• Methylene chloride
• Chloride
• Nitrate plus Nitrite as Nitrogen
Use of analytical methods is consistent with the requirements of the Chloroform Investigat ion
Monitoring Quality Assurance Program (the "Chloroform QAP") attached as Appendix A to the
White Mesa Uranium Mill Groundwater Monitoring QAP Revision 7.7 , dated February 15 ,
2022.
2.1.3 Groundwater Head Monitoring
Depth to groundwater was measured in the following wells and/or piezometers, pursuant to Part
I.E.3 of the Groundwater Discharge Permit (the "GWDP"):
• The quarterly groundwater compliance monitoring wells
• Existing monitoring well MW-4 and all of the temporary chloroform investigation wells
• Piezometers P-1, P-2, P-3A, P-4 and P-5
• MW-20andMW-22
• Nitrate monitoring wells
• The DR piezometers that were installed during the Southwest Hydrologic Investigation
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.
Weekly and monthly depth to groundwater measurements were taken in the chloroform pumping
wells MW-4 , MW-26 TW4-l, TW4-2 TW4-4 T W4-11 , T W4-21 , TW4-37 , TW4-39 , TW4-40 ,
and TW4-41 and the nitrate pumping wells TW4-22 , TW4-24, TW4-25 , and TWN-02. In
addition monthly water level measurements were taken in non-pumping wells T W4-3 through
TW4 -10 , T W4-12 through TW4-14, TW4-16 , T W4-18 , TW4-26 through TW4-36 , TW4-38
TW4-42 , TW4 -43, MW-27 , MW-30 , MW-31 , TWN-1 TWN-3 , TWN-4 , TWN-7 , and TWN-18.
2
2.2 Sampling Methodology and Equipment and Decontamination Procedures
EFRI completed, and transmitted to DWMRC on May 25, 2006, a revised QAP for sampling
under the Mill's GWDP. While the water sampling conducted for chloroform investigation
purposes has conformed to the general principles set out in the QAP, some of the requirements in .
the QAP were not fully implemented prior to DWMRC's approval of the QAP, for reasons set
out in correspondence to DWMRC dated December 8, 2006. Subsequent to the delivery of the
December 8, 2006 letter, EFRI discussed the issues brought forward in the letter with DWMRC
and has received correspondence from DWMRC about those issues. In response to DWMRC's
letter and subsequent discussions with DWMRC, EFRI modified the chloroform Quality
Assurance ("QA") procedures within the Chloroform QAP. The Chloroform QAP describes the
requirements of the chloroform investigation program and identifies where they differ from the
Groundwater QAP. On June 20, 2009 the Chloroform QAP was ·modified to require that the
quarterly chloroform reports include additional items specific to EFRI' s ongoing pump testing
and chloroform capture efforts. The Groundwater QAP as well as the Chloroform QAP were
revised again on June 6, 2012, August 15, 2017, July 23, 2018, May 14, 2019, August 22, 2019,
and February 15, 2022. The revised Groundwater QAP and Chloroform QAP, Revision 7.7 was
approved by DWMRC on March 31, 2022.
The sampling methodology, equipment and decontamination procedures used in the chloroform
contaminant investigation, as summarized below, are consistent with the approved QAP and the
Chloroform QAP.
2.2.1 Decontamination Procedures
Non-dedicated sampling equipment is decontaminated prior to use as described in the DWMRC-
approved QAP and as summarized below.
The water level meter is decontaminated with a detergent/deionized ("DI") water mixture by
pouring the solutions over the water level indicator. The water level meter is then rinsed with DI
water.
The field measurement instrument probe is decontaminated by rinsing with DI water prior to
each calibration. The sample collection cup is washed with a detergent/DI water solution and
rinsed with fresh DI water prior to each calibration.
The non-dedicated purging pump is decontaminated after each use and prior to use at subsequent
sampling locations using the following procedures:
a) the pump is submerged into a 55-gallon drum of nonphosphate detergent/DI water mixture;
b) the detergent/DI water solution is pumped through the pump and pump outlet lines;
c) the pump is submerged into a 55-gallon drum of DI water;
d) the DI water solution is pumped through the pump and pump outlet lines;
3
2.2.2 Well Purging and Depth to Groundwater
The non-pumping wells are purged prior to sampling by means of a portable pump. A list of the
wells in order of increasing chloroform concentration is generated quarterly. The order for
purging the non-pumping wells is thus established. The list is included with the Field Data
Worksheets under Tab B. Mill personnel start purging with all of the non-detect wells and then
move to the wells with detectable chloroform concentrations starting with the lowest
concentration and proceeding to the wells with the highest concentration. One deviation to this
practice is made for the continuously pumping wells. These wells are sampled throughout the
sampling event and are not sampled in the order of contamination. This practice does not affect
the samples for this reason: the pumping wells have dedicated pumps and there will be no cross-
contamination resulting from the sampling order.
Samples are collected by means of disposable bailer(s) the day following the purging. The
disposable bailer is used only for the collection of a sample from an individual well and disposed
subsequent to the sampling. As noted in the approved QAP, sampling will generally follow the
same order as purging; however; the sampling order may deviate slightly from the generated list.
This practice does not affect the samples for these reasons: any wells sampled in slightly
different order either have dedicated pumps or are sampled via a disposable bailer. This practice
does not affect the quality or usability of the data as there will be no cross-contamination
resulting from the sampling order.
Before leaving the Mill office, the portable pump and hose are rinsed with DI water. Where
portable (non-dedicated) sampling equipment is used, a rinsate sample is collected at a frequency
of one rinsate sample per 20 field samples. Well depth measurements are taken and the one
casing volume is calculated for those wells which do not have a dedicated pump as described in
Attachment 2-3 of the QAP. 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 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
specific conductivity, turbidity, pH, redox potential, Dissolved Oxygen ("DO") and water
temperature
2. Purging two casing volumes with stable field parameters for specific conductivity,
turbidity, pH, redox potential, DO, and water temperature (within 10% Relative Percent
Difference ["RPD"])
3. Purging a well to dryness and stability (within 10% RPD) of field parameters for pH,
specific conductivity, and water temperature only after recovery
If the well has a dedicated pump, it is pumped on a set schedule per the remediation plan and is
considered sufficiently evacuated to immediately collect a sample; however, if a pumping well
has been out of service for 48 hours or more, EFRI will follow the purging requirements outlined
in Attachment 2-3 of the QAP. The dedicated pump is used to collect parameters and to collect
the samples as described below. If the well does not have a dedicated pump, a Grundfos pump
(9 -10 gpm pump) is then lowered to the screened interval in the well and purging is started.
4
The purge rate is measured for the well by using a calibrated 5 gallon bucket. This purging
process is repeated at each well location moving from least contaminated to the most
contaminated well. All wells are capped and secured prior to leaving the sampling location.
Wells with dedicated pumps are sampled when the pump is in the pumping mode. If the pump is
not pumping at the time of sampling, it is manually switched on by the Mill Personnel. The well
is pumped for approximately 5 to 10 minutes prior to the collection of the field parameters. Per
the approved QAP, one set of parameters is collected. Samples are collected following the
measurement of one set of field parameters. After sampling, the pump is turned off and allowed
to resume its timed schedule.
2.2.3 Sample Collection
Prior to sampling, a cooler with ice is prepared. The trip blank is also gathered at that time (the
trip blank for these events is provided by the analytical laboratory). Once Mill Personnel arrive
at the wdl sites, labels are filled out for the various samples to be collected. All personnel
involved with the collection of water and samples are then outfitted with disposable gloves.
Chloroform investigation samples are collected by means of disposable bailers.
Mill personnel use a disposable bailer to sample each well that does not have a dedicated pump.
The bailer is attached to a reel of approximately 150 feet of nylon rope and then lowered into the
well. After coming into contact with the water, the bailer is allowed to sink into the water in
order to fill. Once full, the bailer is reeled up out of the well and the sample bottles are filled as
follows:
• Volatile Organic Compound ("VOC") samples are collected first. This sample consists
of three 40 ml vials provided by the Analytical Laboratory. The VOC sample is not
filtered and is preserved with HCl;
• A sample for nitrate/nitrite is then collected. This sample consists of one 250 ml. bottle
that is provided by the Analytical Laboratory. The nitrate/nitrite sample is not filtered
and is preserved with H2SO4;
• A sample for chloride is then collected. This sample consists of one 500 ml. bottle that is
provided by the Analytical Laboratory. The chloride sample is not filtered and is not
chemically preserved.
After the samples have been collected for a particular well, the bailer is disposed of and the
samples are placed into the cooler that contains ice. The well is then recapped and Mill personnel
proceed to the next well.
2.3 Field Data
Attached under Tab B are copies of the Field Data Worksheets that were completed during the
quarter for the chloroform contaminant investigation monitoring wells identified in paragraph
2.1.1 above, and Table 1.
5
2.4 Depth to Groundwater Data and Water Table Contour Map
Attached under Tab C are copies of the Depth to Water Sheets for the weekly monitoring of
MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-11, TW4-19, TW4-21, TW4-22, TW4-24, TW4-
25, TW4-37, TW4-39, TW4-40, TW4-41 and TWN-2 as well as the monthly depth to
groundwater data for the chloroform contaminant investigation wells and the non-pumped wells
measured during the quarter. Depth to groundwater measurements that were utilized for
groundwater contours are included on the Quarterly Depth to Water Worksheet at Tab D of this
report, along with the kriged groundwater contour map for the current quarter generated from
this data. A copy of the kriged groundwater contour map generated from the previous quarter's
data is provided under Tab E.
2.5 Laboratory Results
2.5.1 Copy of Laboratory Results
All analytical results were provided by Chemtech-Ford Analytical Laboratory ("CTF"). Table 1
lists the dates when analytical results were reported to the Director, Regulatory Compliance for
each sample.
Results from the analyses of samples collected for this quarter's chloroform contaminant
investigation are provided under Tab Hof this Report. Also included under Tab Hare the results
of the analyses for duplicate samples, the DIFB, and rinsate samples for this sampling effort, as
identified in Table 1, as well as results for trip blank analyses required by the Chloroform QAP.
2.5.2 Regulatory Framework
As discussed in Section 1.0, above, the SCO triggered a series of actions on EFRI's part. In
addition to the monitoring program, EFRI has equipped one nitrate well and fifteen chloroform
wells with pumps to recover impacted groundwater and has initiated recovery of chloroform
from the perched zone.
Sections 4.0 and 5.0, below, interpret the groundwater level and flow information, contaminant
analytical results, and pump test data to assess effectiveness of EFRI's chloroform capture
program.
3.0 QUALITY ASSURANCE AND DATA VALIDATION
The Director, Regulatory Compliance performed a QA/Quality Control ("QC") review to
confirm compliance of the monitoring program with requirements of the QAP. As required in the
QAP, data QA includes preparation and analysis of QC samples in the field, review of field
procedures, an analyte completeness review, and QC review of laboratory methods and data.
Identification of field QC samples collected and analyzed is provided in Section 3 .1. Discussion
of adherence to Mill sampling Standard Operating Procedures ("SOPs") is provided in Section
3.2. Analytical completeness review results are provided in Section 3.3. The steps and tests
applied to check laboratory data QA/QC are discussed in Sections 3.4.4 through 3.4.9 below.
6
The analytical laboratory has provided summary reports of the analytical QA/QC measurements
necessary to maintain conformance with National Environmental Laboratory Accreditation
Conference ("NELAC") certification and reporting protocol. The Analytical Laboratory QA/QC
Summary Reports, including copies of the Mill's Chain of Custody and Analytical Request
Record forms for each set of Analytical Results, follow the analytical results under Tab H.
Results of the review of the laboratory QA/QC information are provided under Tab I and are
discussed in Section 3.4, below.
3.1 Field QC Samples
The following QC samples were generated by Mill personnel and submitted to the analytical
laboratory in order to assess the quality of data resulting from the field sampling program.
Field QC samples for the chloroform investigation program consist of one field duplicate sample
for each 20 samples, a trip blank for each shipped cooler that contains VOCs, one DIFB and
rinsate samples.
During this quarter, three duplicate samples were collected as indicated in Table 1. The
duplicates were sent blind to the analytical laboratory and analyzed for the same parameters as
the chloroform wells.
Three trip blanks were provided by CTF and returned with the quarterly chloroform monitoring
samples.
Two rinsate blank samples were collected as indi"ated on Table 1. Rinsate samples were labeled
with the name of the subsequently purged well with a terminal letter "R" added ( e.g. TW 4-7R).
The results of these analyses are included with the routine analyses under Tab H,
In addition, one DIFB, while not required by the Chloroform QAP, was collected and analyzed
for the same constituents as the well samples and rinsate blank samples.
3.2 Adherence to Mill Sampling SOPs
The Director, Regulatory Compliance's review of Mill Personnel's adherence to the existing
SOPs, confirmed that the QA/QC requirements established in the QAP and Chloroform QAP
were met.
3.3 Analyte Completeness Review
All analyses required by the GCAP for chloroform monitoring for the period were performed.
3.4 Data Validation
The QAP and GWDP identify the data validation steps and data QC checks required for the
chloroform monitoring program. Consistent with these requirements, the Director, Regulatory
Compliance performed the following evaluations: a field data QA/QC evaluation, a holding time
7
check, a receipt temperature check, an analytical method check, a reporting limit evaluation, a
trip blank check, a QA/QC evaluation of sample duplicates, a QC Control Limit check for
analyses and blanks including the DIFB and a rinsate sample check. Each evaluation is discussed
in the following sections. Data check tables indicating the results of each test are provided under
Tab I.
3.4.1 Field Data QA/QC Evaluation
The Director, Regulatory Compliance performs a review of the 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 measurement of field parameters
based on the requirements discussed in section 2.2.1 above. The purging technique employed
determines the requirements for field parameter measurement and whether stability criteria are
applied. Review of the Depth to Water data confirms that all depth measurements used for
development of the groundwater contour maps were conducted within a five-day period as
indicated by the measurement dates in the summary sheet under Tab D. The results of this
quarter's review of field data are provided under Tab I.
Based upon the review of the field data sheets, the purging and field measurements were
completed in conformance with the QAP requirements. A summary of the purging techniques
employed and field measurements taken is described below:
Purging Two Casing Volumes with Stab le Field Parameters (within 10% RPD)
Wells TW4-5, TW4-8, TW4-9, TW4-16, MW-32, TW4-18, TW4-23, TW4-32, and TW4-38
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.
Purg in g a Well to D ry ness and Stabil ity of a Lim ited List of Field Parameters
Wells TW4-3, TW4-6, TW4-7, TW4-10, TW4-12, TW4-13, TW4-14, TW4-26, TW4-27, TW4-
28, TW4-29, TW4-30 ," TW4-31, TW4-33, TW4-34, TW4-35, TW4-36, TW4-42, and TW4-43
were pumped to dryness before two casing volumes were evacuated. After well recovery, one set
of measurements of pH, conductivity and temperature were taken. The samples were then
collected, and another set of measurements of pH, conductivity and temperature were taken.
Stabilization of pH, conductivity and temperature are required within 10% RPD under the QAP.
The QAP requirements for stabilization were met.
Continuously Pu mped We ll s
Wells MW-4, TW4-1, TW4-2, TW4-4, TW4-11, MW-26, TW4-19, TW4-21, TW4-22, TW4-24,
TW4-25, TW4-37, TW4-39, TW4-40, and TW4-41 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.
During review of the field data sheets, the Director, Regulatory Compliance confirmed that
sampling personnel consistently recorded depth to water to the nearest 0.01 foot.
8
The review of the field sheets for compliance with QAP requirements resulted in the
observations noted below. The QAP requirements in Attachment 2-3 specifically state that field
parameters must be stabilized to within 10% over at least 2 consecutive measurements for wells
purged to 2 casing volumes or purged to dryness. The QAP Attachment 2-3 states that turbidity
should be less than 5 NTU prior to sampling unless the well is characterized by water that has a
higher turbidity. The QAP Attachment 2-3 does not require that turbidity measurements be less
than 5 NTU prior to sampling. As such, the noted observations below regarding turbidity
measurements greater than 5 NTU are included for information purposes only.
Wells TW4-9, TW4-16, MW-32, TW4-18, TW4-21, TW4-32, TW4-38, and TW4-39 exceeded
the QAP's 5 NTU goal. EFRI's letter to DWMRC of March 26, 2010 discusses further why
turbidity does not appear to be an appropriate parameter for assessing well stabilization. In
response to DWMRC's subsequent correspondence dated June 1, 2010 and June 24, 2010, EFRI
completed a monitoring well redevelopment program. The redevelopment report was submitted
to DWMRC on September 30, 2011. DWMRC responded to the redevelopment report via letter
on November 15, 2012. Per the DWMRC letter dated November 15, 2012, the field data
generated this quarter are compliant with the turbidity requirements of the approved QAP.
3.4.2 Holding Time Evaluation
QAP Table 1 identifies the method holding times for each suite of parameters. Sample holding
time checks are provided in Tab I. The samples were received and analyzed within the required
holding times.
3.4.3 Receipt Temperature Evaluation
Chain of Custody sheets were reviewed to confirm compliance with the QAP requirement which
specifies that samples be received at 6°C or lower. Sample temperatures checks are provided in
Tab I. The samples were received within the required temperature limit.
3.4.4 Analytical Method Checklist
The analytical methods reported by the laboratory were checked against the required methods
enumerated in the Chloroform QAP. Analytical method checks are provided in Tab I. The
analytical methods were consistent with the requirements of the Chloroform QAP.
3.4.5 Reporting Limit Evaluation
The analytical method reporting limits reported by the laboratory were checked against the
reporting limits enumerated in the Chloroform QAP. Reporting Limit Checks are provided under
Tab I. The analytes were measured and reported to the required reporting limits; several sets of
sample results had the reporting limit raised for at least one analyte due to matrix interference
and/or sample dilution. In these cases, the reported value for the analyte was higher than the
increased detection limit.
9
3.4.6 Receipt pH Evaluation
Appendix A of the QAP states that volatile samples are required to be preserved and arrive at the
laboratory with a pH less than 2. A review of the laboratory data revealed that volatile samples
were received at the laboratory with a pH less than 2.
3.4. 7 Trip Blank Evaluation
Trip blank results were reviewed to identify any VOC contamination resulting from transport of
the samples. Trip blank checks are provided in Tab I. All of the trip blank samples were
nondetect.
3.4.8 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-
01 as cited in the QAP. The RPDs are calculated for the duplicate pairs for all analytes regardless
of whether or not the reported concentrations are greater than 5 times the required detection
limits; however, data are considered noncompliant only when the results are greater than 5 times
the reported detection limit and the RPD is greater than 20%. The additional duplicate
information is provided for information purposes.
The duplicate results were within a 20% RPD in the samples except as noted in Tab I. The
approved QAP specifies a separate corrective action for duplicate RPDs outside of acceptance
limits. The revised procedure for duplicate results outside of acceptance limits was implemented
for the results outside of the acceptance limits. The corrective actions that were taken in
accordance with the QAP procedure are as follows: the Director, Regulatory Compliance
contacted the Analytical Laboratory and requested a review of the raw data to assure that there
were no transcription errors and the data were accurately reported. The laboratory noted that the
data were accurate and reported correctly. Reanalysis was not completed as the samples were
out of holding time. Duplicate results are included in Tab I.
3.4.9 Rinsate Sample Check
Rinsate blank sample checks are provided in Tab I. The rinsate blank sample concentration
levels were compared to the QAP requirements i.e., that rinsate sample concentrations be one
order of magnitude lower than that of the actual well.
Rinsate blank sample TW4-12R had a reported chloroform detection of 14.2 ug/L for
chloroform. The well sampled before TW 4-12R was TW 4-12 which had no detection of
chloroform. The rinsate blank results for TW4-12R were outside acceptance limits for the rinsate
blank results because the rinsate blank results were not one order of magnitude less than the
associated sample results. The rinsate samples with positive detections are likely the result of
10
contributions from the DI system and not the result of cross contamination as indicated by the
positive result in TW4-12R.
Rinsate blank sample TW4-30R had a reported detection of 21.6 ug/L for chloroform. The well
sampled before TW4-30R was TW4-08 which had a reported detection of 2.6 ug/L for
chloroform. The result for TW4-30 was 26.2 ug/L for chloroform. The rinsate blank results for
TW4-30R were outside acceptance limits for the rinsate blank results because the rinsate blank
results were not one order of magnitude less than the associated sample results (either TW4-08
or TW4-30) The rinsate samples with positive detections are likely the result of contributions
from the DI system and not the result of cross contamination as indicated by the positive result in
TW4-32R.
The DI blank from the on-site DI system which generates the water for rinsate blank samples
was nondetect for chloroform. EFRI is continuing the investigation of the chloroform in the DI
samples. The results of this investigation will be provided in future reports. EFRI is contacting
the media and filter provider again and looking at plumbing systems to determine if the
chloroform is originating within the physical system.
The data for all samples are usable as reported. Even if there were contribution of chloroform to
the sample results, it would bias the data high and would result in a more conservative data
application. EFRI does not believe the data quality has been affected.
3.4.10 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, EFRI'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-specified acceptance limits, or that the case
narrative sufficiently explains any deviation from these limits. Results of this quantitative check
are provided in Tab I.
The lab QA/QC results met these specified acceptance limits except as noted below.
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.
11
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 I. 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 QAP specifies that surrogate compounds shall be employed for all organic analyses, but the
QAP does not specify acceptance limits for surrogate recoveries. The analytical data associated
with the routine quarterly sampling met the requirement specified in the QAP. The information
from the Laboratory QA/QC Summary Reports indicates that the surrogate recoveries for the
quarterly chloroform samples were within acceptable laboratory limits for the surrogate
compounds except as noted in Tab I. The surrogates that were outside of acceptance limits were
above the upper limits. High surrogate recoveries indicate a high bias to the sample results and
as such have no effect on the usability of the data. The requirement in the QAP to analyze
surrogate compounds was met and the data are compliant with the QAP. Furthermore, there are
no QAP requirements for surrogate recoveries.
The QAP, Section 8.1.2 requires that each analytical batch shall be accompanied by a method
blank. The analytical batches routinely contain a blank, which is a blank sample made and
carried through all analytical steps. For the Mill samples, a method blank was prepared for the
analytical methods. Per the approved QAP, contamination detected in analysis of method blanks
will be used to evaluate any analytical laboratory contamination of environmental samples. The
QAP states that non-conformance conditions will exist when contaminant levels in the
samples( s) are not an order of magnitude greater than the blank result. There were no detections
in the method blanks in this quarter. Method blank results are included in Tab I.
The information from the Laboratory QA/QC Summary Reports indicates that there were both
low and high LCS recoveries as indicated in Tab I.
Low LCS recoveies for chloromethane and methylene chloride were reported in analytical report
2411050. The low LCS affected twelve samples. The data were flagged in accordance with EPA
Method 8260. The data are usable for the intended purpose because chloromethane and
methylene chloride are not frequently detected.
A high LCS recovery for carbon tetrachloride was reported in analytical report 24H2049. The
high LCS affected fifteen samples. The data were flagged in accordance with EPA Method 8260.
The data are usable for the intended purpose because carbon tetrachloride is not frequently
detected.
12
4.0 INTERPRETATION OF DATA
4.1 Interpretation of Groundwater Levels, Gradients and Flow Directions.
4.1.1 Current Site Groundwater Contour Map
The water level contour maps (See Tab D) 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 locally changes the generally
southerly perched water flow patterns. For example, northeast of the Mill site, mounding
associated with formerly used wildlife ponds is still evident and 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
associated 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 northern 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 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.
13
In general, chloroform and nitrate concentrations within and in the vicinity of the chloroform
plume appear to have been impacted to a greater extent than nitrate concentrations within and
adjacent to the nitrate 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 northern wildlife ponds.
In addition, the southern wildlife pond is in relatively close proximity to the downgradient
(southern) extremity of the chloroform plume. Reduced recharge at the southern pond, and decay
of the associated groundwater mound, has been expected to impact water level behavior and
chloroform and nitrate concentrations in wells within this portion of the chloroform plume.
Localized increases in concentrations of constituents such as chloroform and nitrate within and
near the chloroform plume, and of nitrate and chloride within and near the nitrate plume, may
occur even when these plumes are under control. Ongoing mechanisms that can be expected to
increase constituent concentrations 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.
2) Reduced saturated thicknesses -dewatering of higher permeability layers rece1vmg
primarily low constituent concentration pond water will result in wells intercepting these
layers 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 TW 4-4 and TW 4-3 7, which began pumping in the first quarter of 2010 and the
second quarter of 2015, respectively. The third quarter of2018 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
14
depression near TW4-4 likely resulted from 1) variable permeability conditions in the vicinity of
TW 4-4, and 2) historical relatively low water levels at adjacent well TW 4-14.
Nitrate pumping wells TW4-22, TW4-24, TW4-25, and TWN-2 started pumping during the first
quarter of 2013. By the fourth quarter of 2013, operation of the nitrate pumping system had
produced well-defined impacts on water levels. Water level impacts of the nitrate and chloroform
pumping systems overlap; however the long-term interaction between the nitrate and chloroform
pumping systems is evolving, and changes will be reflected in data collected during routine
monitoring.
Water level patterns near nitrate pumping 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 at TWN-7. 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.
As discussed above, variable permeability conditions likely contributed to the 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 TW4-4 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
of2007 and the fourth quarter of 2009 Gust prior to the start ofTW4-4 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 levels 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 from the fourth quarter of 2020 through the second quarter of
2022, have been generally 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 plume since the first quarter of2021) has trended
downward since 2013. These generally downward trends are attributable to both the cessation of
water delivery to the wildlife ponds 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
15
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 pumping 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 historically relatively low water level at non-pumping well TW 4-14, located
east of TW 4-4 and TW 4-6. Prior to 2018, although water level differences among these three
wells had diminished, and TW4-4 has been pumping since 2010, the water level at TW4-14 was
typically lower than the water level at TW4-6 and lower to an even greater extent than the water
level at TW4-4. However, since the first quarter of 2018, as a result of pumping at TW4-41
(adjacent to 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 5535.2 feet above mean sea level ["ft amsl"]) is more than
7 feet higher than the water level at TW4-6 (approximately 5527.5 ft amsl), and is more than 10
feet higher than the water level at TW4-4 (approximately 5524.3 ft. amsl).
The static water levels at wells TW4-14 and downgradient well TW4-27 (installed south of
TW4-14 in the fourth quarter of 2011) were similar (within 1 to 2 feet) until the third quarter of
2014; both appeared anomalously low. TW4-27 was positioned at a location considered likely to
detect any chloroform present and/or to bound the chloroform plume to the southeast and east
(respectively) of TW4-4 and TW4-6. As will be discussed below, groundwater data collected
since installation indicates that TW4-27 does indeed bound the chloroform plume to the
southeast and east of TW4-4 and TW4-6 (respectively); however, chloroform exceeding 70 µg/L
has been detected at more recently installed temporary perched wells TW4-29 (located south of
TW4-27) and TW4-33 (located between TW4-4 and TW4-29).
Prior to the installation of TW4-27, the persistently low water level at TW4-14 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
(5525.4 feet amsl) is, however, lower than water levels at adjacent wells TW4-6 (5527.5 feet
amsl) and TW4-23 (5529.5 feet amsl), as shown in the detail water level map under Tab D.
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 201 O; and HGC, November 28, 2011: Installation, Hydraulic Testing, and Perched
Zone Hydrogeology of Perched Monitoring Well TW4-27, White Mesa Uranium Mill Near
16
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, TW4-3 l, 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 (5528.3 ft. amsl) is nearly 7 feet lower than the
water level at TW4-14 (5535.2 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 TW4-14 and TW4-27 delayed
responses at these locations. Until pumping started at TW 4-41, water levels at both these wells
were consistently lower than in surrounding higher permeability materials even 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).
The low permeability at TW4-14 and TW4-27 is expected to retard the transport of chloroform
to these wells (compared to nearby wells). As will be discussed in Section 4.2.3, TW4-14 and
17
TW4-27 remain outside the plume with current quarter chloroform concentrations of less than 1
µg/L and nearly 3 µg/L, respectively.
Chloroform exceeding 70 µg/L detected at TW4-29 and TW4-33 since their installation in 2013
indicates that, in addition to migrating south from TW4-4 to TW4-6 and TW4-26, chloroform
also migrated along a relatively narrow path to the southeast from the vicinity of TW 4-4 to TW 4-
33 then TW4-29. Such migration was in a direction nearly cross-gradient with respect to the
direction of groundwater flow implied by the historic groundwater elevations in this area, which,
until about 2014, placed TW4-14 almost directly downgradient of TW4-4. Such migration was
historically possible because the water levels at TW4-29 were lower than the water levels at
TW4-4 (and TW4-6). The permeability and historic water level distributions are generally
consistent with the apparent nearly cross-gradient migration of chloroform from TW4-4 around
the low permeability zone defined by TW4-36, TW4-14, and TW4-27. (Note that, although
concentrations at TW4-29 still exceed 70 µg/L, concentrations at TW4-33 have remained below
70 µg/L since the end of 2020.)
Chloroform at TW4-30 exceeded 70 µg/L for the first time during the fourth quarter of 2020;
dropped below 70 µg/L during the third quarter of 2022; and was detected at approximately 26
µg/L this quarter. Consequently, TW4-30 again bounds the plume immediately to the east.
Chloroform was not detected at relatively recently installed bounding well TW4-43 (located east-
southeast of TW4-30); nor TW4-31 (located east ofTW4-27).
Data from wells within and adjacent to the southern portion of the chloroform plume indicate
that:
1. Chloroform exceeding 70 µg/L at TW4-29 is bounded by concentrations below 70 µg/L at
wells TW4-6, TW4-23, TW4-27, TW4-33, TW4-34, TW4-35 and TW4-42; and, as
discussed above, TW4-30 (with a concentration this quarter of approximately 26 µg/L)
again bounds the plume immediately to the east. Although previously downgradient of
TW4-29, due to long-term changes in water levels, TW4-30 is now generally cross-
gradient of TW4-29. TW4-6, TW4-23, TW4-27 and TW4-33 are generally cross-to
upgradient of TW4-29; TW4-34 and TW4-35 are generally cross-to downgradient of
TW4-29; TW4-42 is generally cross-to downgradient of TW4-29; and TW4-43 is
generally cross-to downgradient of TW4-30.
2. Although historically not detected at TW4-34 and TW4-35, chloroform (at low
concentrations) has been detected relatively recently at both wells. Chloroform was first
detected at TW4-34 during the third quarter of 2022 and at TW4-35 during the third
quarter of 2023. After the first detection, chloroform has been detected at TW4-34 four
times, although it is not detected during the current quarter. Chloroform has been
detected at TW4-35 each quarter since the first detection, including during the current
quarter (at a concentration of 3.7 µg/L).
3. Chloroform concentrations at TW4-33 that are lower than concentrations at TW4-29, and
the likelihood that a pathway exists from TW4-4 to TW4-33 to TW4-29, suggest that
concentrations in the vicinity of TW4-33 were likely higher prior to initiation of TW4-4
18
pumping, and that lower concentrations historically detected at TW4-33 are due to its
closer proximity to TW 4-4.
4. Chloroform concentrations at TW4-26 exceeded 70 µg/L for the first time during the
second quarter of 2017. Chloroform at TW 4-26 is bounded by concentrations below 70
µg/L at TW4-6 and TW4-23 (located up-to cross-gradient of TW4-26); and at TW4-34
(located generally cross-gradient of TW4-26). Chloroform has not been detected at
TW4-23; and, as discussed above, after its first detection during the third quarter of 2022,
chloroform has been detected at TW4-34 four additional times, although it is not detected
during the current quarter. Although chloroform exceeding 70 µg/L was detected at well
TW4-40, installed approximately 200 feet south of TW4-26 in February, 2018,
chloroform has not been detected at TW4-42, installed approximately 200 feet south of
TW4-40 in April, 2019. TW4-42 is generally down to cross-gradient of TW4-26 and
downgradient ofTW4-40 and bounds the chloroform plume to the south.
TW4-4 pumping, enhanced by operation of adjacent pumping well TW4-41, has been expected
to eventually reduce chloroform at both TW4-29 and TW4-33 by cutting off the source. The
decrease at TW4-33 has been anticipated to be faster than at TW4-29 because TW4-33 is in
closer proximity to TW 4-4 pumping. Such behavior would be analogous to the temporary
decreases in chloroform concentrations that occurred at TW4-6 and TW4-26 once TW4-4
pumping began (discussed in Section 4.2.3). Since installation in 2013, concentrations at TW4-
33 have been relatively stable to decreasing (and have generally been decreasing since 2018);
however, from the third quarter of 2014 until the second quarter of 2020, concentrations at TW4-
29 generally increased before subsequently stabilizing and decreasing.
This behavior suggests that chloroform migration has been arrested at TW4-33 by TW4-4 (and
TW4-41) pumping and that previously increasing chloroform at TW4-29 resulted from a remnant
of the plume that migrated past TW4-33 and generally toward TW4-30 (which was previously
downgradient of TW4-29). The influence of TW4-4 pumping at the distal end of the plume is
consistent with generally decreasing water levels at both TW4-29 and TW4-33. Pumping at
TW 4-41 since the second quarter of 2018 has been expected to help maintain or enhance this
decline.
Decreasing water level trends at TW4-29 and TW4-33 are also consistent with reduced wildlife
pond seepage. The decay of the groundwater mound associated with the southern wildlife pond,
which is 3 to 4 times closer to the southern extremity of the chloroform plume than the northern
ponds, is expected to impact water levels within and adjacent to this portion of the plume.
Reduced wildlife pond seepage, in particular, reduced seepage from the southern wildlife pond,
likely contributes to decreasing water level trends at both wells (since about the fourth quarter of
2013); temporarily increased concentrations at TW4-6 subsequent to the first quarter of 2014;
and increased concentrations at TW4-26 since the third quarter of 2016.
As the groundwater mound associated with the southern pond decays, groundwater flow
directions in the southern extremity of the plume have become more southerly, and plume
migration has turned more to the south. An increasingly southerly direction of plume migration
is consistent with water level changes in this area and increased concentrations at TW 4-26.
19
In addition, generally decreasing concentrations at TW4-6 since the third quarter of 2015, and
generally increased concentrations at TW 4-26 since the third quarter of 2016, suggest that TW 4-
4 pumping has arrested chloroform migration between TW 4-4 and TW 4-6, and that increased
chloroform at TW4-26 results from a remnant of the plume that continues to migrate south from
TW4-6 to TW4-26. The enhancement of pumping in the vicinity of TW4-4 by the start-up of
TW4-41 pumping in the second quarter of 2018 has been expected to increase this apparent
separation and to have resulted in concentrations at TW4-6 dropping below 70 µg/L after the
second quarter of 2018. Furthermore, the initiation of pumping at TW4-40 during the second
quarter of 2019 is expected to reduce or prevent chloroform migration to the south of TW 4-40.
Small but detectable chloroform concentrations at TW4-14 (from the fourth quarter of 2014
through the first quarter of 2021; and during the third quarter of2022) and at TW4-27 (since the
third quarter of 2015) suggest ongoing, but slow, downgradient migration of chloroform from the
southeastern extremity of the plume (near TW4-29 and TW4-33) into the low permeability
materials penetrated by TW4-14 and TW4-27. Pumping at TW4-41 is expected to reduce or
prevent future migration of chloroform toward these wells.
Ongoing, but slow, downgradient migration of chloroform from the southeastern extremity of the
plume into the vicinities of TW4-34 and TW4-35 is also consistent with the small, but
detectable, chloroform concentrations at these wells since the third quarters of 2022 and 2023,
respectively.
4.1.2 Comparison of Current Groundwater Contour Maps to Groundwater Contour
Maps for Previous Quarter
The groundwater contour map for the Mill site for the second quarter of 2024, as submitted with
the Chloroform Monitoring Report for the second quarter of 2024, is attached under Tab E. A
comparison of the water table contour maps for the current quarter ( third quarter of 2024) to the
water table contour maps for the previous quarter (second quarter of 2024) 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 pumping capture is larger than last quarter.
Drawdown patterns and overall capture associated with pumping of the original chloroform
pumping wells MW-4, MW-26, and TW4-19 have changed as additional groups of wells have
been added to the pumping network. A large expansion in capture occurred within a year of the
initiation of pumping at nitrate pumping wells TW4-22, TW4-24, TW4-25 and TWN-2 in the
first quarter of 2013. Additional large expansions occurred once chloroform pumping wells
TW4-1, TW4-2, TW4-l 1, TW4-21 and TW4-37 became operational in 2015, and once TW4-39
became operational in the fourth quarter of 2016. Significant expansion of capture to the south
has resulted from pumping of TW4-41 since the second quarter of 2018 and from initiation of
pumping at TW4-40 during the second quarter of 2019.
The drawdowns at chloroform pumping well TW4-4; and nitrate pumping wells TW4-22 and
TWN-2 increased by more than 2 feet this quarter, whereas the drawdowns at chloroform
pumping wells MW-26, TW4-l, TW4-2, TW4-37 and TW4-39 decreased by more than 2 feet
this quarter. Water level changes at other nitrate and chloroform pumping wells were 2 feet or
20
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 historically relatively low water level at adjacent well TW4-14.
The expanded cone of depression associated with TW4-4 and adjacent pumping well TW4-41
since the initiation of pumping at TW4-41 in the second quarter of 2018 has contributed to
southerly expansion of total pumping system capture. As discussed above, southerly expansion
of capture was additionally enhanced in the second quarter of 2019 by the initiation of pumping
at TW4-40.
The water levels at Piezometers 1, 2, 4 and 5; and at TWN-1 and TWN-4 decreased this quarter,
with a maximum decrease of approximately 0.29 ft at TWN-1; whereas the water level at
Piezometer 3A increased this quarter by nearly 0.2 feet. 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 3 ft, more
than compensating for the approximately 2.1 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. Similar to last quarter, measurable water was also not 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 F are hydrographs showing groundwater elevation m each chloroform
contaminant investigation monitor well over time.
4.1.4 Depth to Groundwater Measured and Groundwater Elevation
Attached under Tab F are tables showing depth to groundwater measured and groundwater
elevation over time for each of the wells listed in Section 2.1.1 above.
4.1.5 Evaluation of the Effectiveness of Hydraulic Capture
21
Perched water containing chloroform has been removed from the subsurface by operating
chloroform pumping wells MW-4, MW-26 and TW4-19 since 2003; TW4-4 since 2010; TW4-1,
TW4-2, TW4-11, TW4-21 and TW4-37 since 2015; TW4-39 since the fourth quarter of 2016;
TW4-41 since the second quarter of 2018; and TW4-40 since the second quarter of 2019. TW4-
20 was also operated as a pumping well from 2005 until August, 2020 vv:,hen it collapsed and was
subsequently abandoned. The primary purpose of pumping the above wells is to reduce total
chloroform mass in the perched zone as rapidly as is practical.
The original pumping wells up gradient of TW 4-4 were chosen because 1) they were located in
areas of the perched zone having relatively high permeability and saturated thickness, and 2)
high concentrations of chloroform were detected at these locations. The relatively high
transmissivity of the perched zone in the vicinity of these original pumping wells resulted in the
wells having a relatively high productivity. The combination of relatively high productivity and
high chloroform concentrations allowed for a high rate of chloroform mass removal. TW 4-4 and
TW 4-41 are located in a downgradient area having relatively high chloroform concentrations but
relatively small saturated thickness, and at a transition from relatively high to relatively low
permeability conditions downgradient of TW4-4. As with the other chloroform pumping wells,
pumping TW4-4 and TW4-41 helps to reduce the rate of chloroform migration in downgradient
portions of the plume.
Although pumping ofTW4-6 and TW4-26 (located south of TW4-4 and TW4-41) is impractical
due to low permeability and small saturated thicknesses, the permeability in the vicinity of TW 4-
40 (located south of TW4-26) is large enough to make pumping practical. TW4-40 is valuable in
that it is located within the downgradient (southern) toe of the plume and is relatively productive.
Pumping of TW 4-40 is likely to more effectively reduce or prevent further downgradient plume
migration than can be expected by pumping at the more upgradient locations.
The impact of chloroform pumping is indicated by the water level contour maps attached under
Tabs D and E. Cones of depression are evident in the vicinity of MW-4; and near MW-26,
TW4-19, TW4-37 and TW4-39. These wells continue to remove significant quantities of
chloroform from the perched zone. Relatively large cones of depression are also evident in the
vicinities of wells TW4-1 and TW4-2 (near MW-4); and at TW4-1 l. These wells began pumping
during the first quarter of 2015. As discussed in Section 4.1.1, although chloroform pumping
well TW4-4 became operational in 2010, the drawdown associated with TW4-4 was likely less
apparent due to variable permeability conditions near TW4-4 and the persistently low water level
at adjacent well TW4-14. However, pumping at adjacent well TW4-41 since the second quarter
of 2018 has generally increased drawdowns in this area; the third quarter of 2018 was the first
quarter that a well-defined cone of depression was associated with TW4-4. As discussed in
Section 4.1.2 the combined pumping of TW4-4 and TW4-41, enhanced by initiation of pumping
at TW 4-40 during the second quarter of 2019, has contributed to southerly expansion of total
pumping system capture. Overall, the water level contour maps indicate effective capture of
water containing high chloroform concentrations in the vicinities of the pumping wells.
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, TW4-11, TW4-19, TW4-21, TW4-40 and TW4-41; and nitrate pumping wells TW4-24 and
22
TW4-25 were less than two feet. Water level decreases occurred in chloroform pumping wells
TW4-4 (more than 3.3 feet); TW4-l 1 (more than 1.2 feet); TW4-40 (approximately 0.4 feet);
and TW4-41 (approximately 1.6 feet); and in nitrate pumping wells TW4-22 (more than 22 feet);
TW4-25 (approximately 0.1 feet); and TWN-2 (more than 2.5 feet). Water level increases
occurred in chloroform pumping wells MW4 (nearly 0.3 feet); MW-26 more than 8.5 feet);
TW4-1 (approximately 5.3 feet); TW4-2 (approximately 4.7 feet); TW4-19 (approximately 1.7
feet); TW4-21 (nearly 0.2 feet); TW4-37 (approximately 6.6 feet); and TW4-39 (approximately
5.6 feet); and in nitrate pumping well TW4-24 (more than 1.2 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 chloroform pumping wells added since
the beginning of 2015 is expected to generally increase over time as water levels continue to
decline due to cessation of water delivery to the northern wildlife ponds and continued pumping.
Slow development of hydraulic capture in the vicinities of many wells is consistent with and
expected based on the relatively low permeability of the perched zone at the site.
The hydraulic capture effectiveness of both chloroform and nitrate pumping systems depends to
some extent on the continued productivity of chloroform and nitrate pumping wells. Decreases in
productivity since the third quarter of 2014 have been noted in chloroform pumping well TW4-
19 and nitrate pumping well TW4-24. The impact of reduced productivity of these wells on
chloroform capture was discussed in Attachment N (Tab N) of the third quarter, 2015 report. The
report also included a discussion of the effectiveness of chloroform pumping on chloroform
capture. 'Background' flow through the chloroform plume was calculated in Attachment N as
approximately 3.3 gpm. A more refined 'background' flow calculation of 3.4 gpm was provided
in the 2016 CACME Report (See HGC, March 31, 2016: Corrective Action Comprehensive
Monitoring Evaluation Report, White Mesa Uranium Mill, Near Blanding, Utah).
However, since 2016, as saturated thicknesses and hydraulic gradients within the plume continue
to decline, the 'background' flow through the chloroform plume has also declined. Decreases in
productivity at TW4-4 since the third quarter of 2016 have been addressed by the operation of
adjacent pumping well TW4-41 since the second quarter of 2018; however a general decline in
productivity of many of the other chloroform pumping wells (in particular, TW4-1, TW4-2,
TW4-11, TW4-21, TW4-37, TW4-39, TW4-40 and TW4-41) correlates to the general decline in
saturated thickness in these wells as discussed in the 2024 CACME report (See HGC, March 28,
2024: Corrective Action Comprehensive Monitoring Evaluation Report, White Mesa Uranium
Mill, Near Blanding, Utah). To account for the decrease in 'background' flow through the plume
caused by continuing reductions in saturated thicknesses and hydraulic gradients, the
'background' flow through the plume was recalculated as 2.24 gpm, thereby reducing the
amount of pumping needed to control the plume.
Pumping during the current quarter from wells within and immediately adjacent to the
chloroform plume (wells MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-11, TW4-19, TW4-21,
TW4-22, TW4-24, TW4-37, TW4-39, TW4-40 and TW4-41) is approximately 4.4 gpm.
23
The pumping calculation is based on the total volume pumped by the above wells over the 90
day quarter (566,613 gallons) and accounts for times that the pumps are off due to insufficient
water columns in the wells. Pumping from these wells exceeds the re-calculated background
flow of 2.24 gpm by nearly 2.2 gpm, or nearly 98 %, which is adequate even considering the
reduced productivities of some wells and the abandonment of TW4-20. In addition, because of
continued reductions in saturated thicknesses and hydraulic gradients resulting from reduced
wildlife pond recharge, 'background' flow through the plume is expected to continue to
diminish, thereby continuing to reduce the pumping needed to control the plume.
Chloroform concentrations at many locations have been or appear to be affected by changes
associated with reduced dilution from the wildlife ponds and nitrate pumping. For example,
increases in chloroform at TW4-22 and TW4-24 after these wells were converted to nitrate
pumping wells are attributable to westward migration of chloroform from the vicinity ofTW4-20
(now abandoned) toward these wells. The increase in concentration at TW4-8 from non-detect to
100 µg/L in the first quarter of 2014 is likely related to reduced dilution. The concentration at
TW 4-8 remained below 70 ug/L this quarter after dropping below 70 µg/L during the first
quarter of 2020. In addition, although the chloroform concentration in TW4-6 generally
decreased between the first quarter of 2015 and the current quarter (and remains outside the
plume), concentrations at TW4-6 increased from approximately 6 µg/L in the first quarter of
2014 to 1,180 µg/L in the first quarter of 2015 before dropping to 3.3 µg/L this quarter. The
increase between the first quarter of 2014 and the first quarter of 2015 was likely related to both
reduced dilution and more westward flow induced by nitrate pumping.
TW 4-6 is located immediately south and historically cross-to downgradient of chloroform
pumping well TW4-4. TW4-6 has been incorporated into the chloroform plume twice: from the
first quarter of2009 through the third quarter of 2010; and from the third quarter of 2014 through
the second quarter of 2018. Pumping of TW4-6 (and TW4-26) is impractical because of
relatively low permeability and relatively small saturated thicknesses. However, pumping at
more productive locations upgradient of TW4-6 (such as TW4-4 and TW4-41) enhances mass
removal and lowers hydraulic gradients, thereby reducing the rate of downgradient chloroform
migration and allowing natural attenuation to be more effective. Pumping at TW4-4 was
implemented during the first quarter of 2010 to improve capture downgradient of TW4-4 to the
extent allowable by the lower productivity conditions present in this area.
The beneficial effect of pumping TW 4-4 was demonstrated by the net decreases in TW 4-6
chloroform concentrations from 1,000 µg/L to 10.3 µg/L, and in TW4-26 from 13 µg/L to 4.2
µg/L, between the initiation of TW4-4 pumping and the second quarter of 2014. Concentrations
at these wells decreased substantially even though they did not unambiguously appear to be
within the hydraulic capture of TW4-4. As discussed in Section 4.1.1, however, the decrease in
the long-term rate of water level rise at TW4-6 after TW4-4 began pumping does suggest that
TW4-6 was within the hydraulic influence of TW4-4. The decline in water levels at TW4-6 since
the fourth quarter of 2013 likely reflects the additional influences of cessation of water delivery
to the wildlife ponds and the addition of chloroform pumping wells TW4-1, TW4-2, TW4-11
and TW 4-41. Regardless of whether TW 4-6 was demonstrably within the hydraulic capture of
TW4-4, pumping TW4-4, and more recently installed adjacent pumping well TW4-41, helps to
24
reduce chloroform migration to TW4-6, TW4-26, and other downgradient locations by the
mechanisms discussed above.
Likewise, pumping at other productive upgradient locations has a beneficial impact on
downgradient chloroform even if the downgradient chloroform is not completely within the
hydraulic capture of the productive upgradient well(s). For example, pumping at MW-26 likely
reduced chloroform concentrations at TW4-16 from a maximum of 530 µg/L in the second
quarter of 2004 to less than 70 µg/L by the fourth quarter of 2005, and maintained concentrations
below 70 µg/L until the second quarter of 2014, even though TW 4-16 appears to be beyond the
hydraulic capture of MW-26. Furthermore, the overall hydraulic capture of the chloroform
pumping system has expanded since initiation of pumping at wells TW4-l, TW4-2, TW4-11,
TW4-21, TW4-37, TW4-39, TW4-40 and TW4-41 since the beginning of 2015. In particular, the
addition of wells TW4-1, TW4-2, TW4-11, TW4-21, TW4-37 and TW4-39 likely halted the
mid-2013 to end of 2014 increase in concentration at TW4-16 from non-detect to 387 µg/L.
Concentrations at TW4-16 dropped from 387 µg/L in the fourth quarter of 2014 to less than 70
µg/L by the second quarter of 2015. Although chloroform at TW 4-16 has been above and below
70 µg/L since 2014 and was detected at 93.7 µg/L this quarter, concentrations have been higher
since 2018, likely in response to reduced dilution.
Chloroform exceeding 70 µg/L was detected in the second quarter of 2013 at TW4-29, installed
during the first quarter of 2013 and located south of TW4-27 and east of TW4-26. With respect
to historic groundwater flow directions implied by historic groundwater elevations in this area,
TW4-29 was positioned generally cross-gradient of TW4-4 and TW4-6. As discussed in Section
4.1.1, chloroform detected at TW4-29 may have migrated around the low permeability area
defined by TW4-27, TW4-14 and TW4-36. The apparent migration pathway from TW4-4 to
TW4-29 is consistent with chloroform exceeding 70 µg/L detected in the fourth quarter of 2013
at TW4-33, installed during the third quarter of 2013 and located between TW4-4 and TW4-29.
Chloroform concentrations at TW4-33 that are lower than concentrations at TW4-29, and the
likelihood that a pathway exists from TW4-4 to TW4-33 to TW4-29, suggest that concentrations
in the vicinity of TW4-33 were likely higher prior to initiation ofTW4-4 pumping.
TW4-4 pumping (augmented by pumping at adjacent well TW4-41) has been expected to reduce
chloroform at both TW4-33 and TW4-29 by cutting off the source, with the impact at TW4-33
anticipated to be greater than at TW4-29 because TW4-33 is in closer proximity to TW4-4 (and
TW4-41) pumping. By analogy, such behavior would be consistent with the decreases m
chloroform concentrations at TW4-6 and TW4-26 that occurred once TW4-4 pumping began.
However, for several quarters after installation, concentrations at both TW4-29 and TW4-33
were relatively stable (rather than decreasing). Between the third quarter of 2014 and the second
quarter of 2020, concentrations at TW4-29 generally increased; subsequently concentrations
stabilized then began to decrease. Over the same time period concentrations at TW4-33 remained
generally stable to decreasing. As discussed in Section 4.1.1, decreasing concentration trends at
both wells were eventually expected to occur. Since the third quarter of 2014, TW4-33
concentrations that have been relatively stable to decreasing; and TW4-29 concentrations that
generally increased before stabilizing ( during 2020) then generally decreasing; appear consistent
with these expectations. Trends at these wells suggest that chloroform migration has been
25
arrested at TW4-33 by TW4-4 (and TW4-41) pumping and that previously increasing chloroform
at TW4-29 resulted from a remnant of the plume that migrated past TW4-33 generally toward
TW4-30. The influence of TW4-4 pumping at the distal end of the plume is consistent with
generally decreasing water levels at both TW4-29 and TW4-33. However, as discussed in
Section 4.1.1, decreasing water level trends are also consistent with reduced wildlife pond
seepage. The decay of the groundwater mound associated with the southern wildlife pond, which
is 3 to 4 times closer to the southern extremity of the chloroform plume than the northern ponds,
is likely to impact water levels within and adjacent to this portion of the plume.
As discussed in Section 4.1.1, generally decreasing water level trends at TW4-6 and TW4-26
(since about the fourth quarter of 2013), temporarily increased concentrations at TW4-6 (since
the first quarter of 2014) and increased concentrations at TW4-26 (since the third quarter of
2016), are also consistent with reduced wildlife pond seepage, in particular reduced seepage
from the southern wildlife pond. As the groundwater mound associated with the southern pond
decays, groundwater flow directions in the southern extremity of the plume have become more
southerly, and plume migration is turning more to the south. An increasingly southerly direction
of plume migration is consistent with increased concentrations at TW4-26 (from less than 10
µg/L in the third quarter of2016 to 549 µg/L this quarter).
In addition, as in the area near TW4-29 and TW4-33, generally decreasing concentrations at
TW4-6 since the third quarter of 2015, and generally increased concentrations at TW4-26 since
the third quarter of 2016, suggest that TW4-4 (and TW4-41) pumping has arrested chloroform
migration between TW4-4 and TW4-6, and that increased chloroform at TW4-26 results from a
remnant of the plume that continues to migrate south from TW4-6 to TW4-26. The enhancement
of pumping in the vicinity of TW4-4 by the start-up ofTW4-41 pumping in the second quarter of
2018 has been expected to increase this apparent separation and to have resulted m
concentrations at TW4-6 dropping below 70 µg/L beginning in the third quarter of 2018.
Furthermore, small but detectable chloroform concentrations at TW4-14 (from the fourth quarter
of 2014 through the first quarter of 2021; and during the third quarter of 2022) and at TW 4-27
(since the third quarter of 2015) suggest ongoing, but slow, downgradient migration of
chloroform from the southeastern extremity of the plume into the low permeability materials
penetrated by these wells. Because the chloroform concentration at TW4-30 dropped below 70
µg/L during the third quarter of 2022, TW4-30 again bounds the plume to the east ofTW4-29.
Chloroform analytical results from TW4-34 and TW4-35 (Section 4.2.3) demonstrate that
chloroform is bounded to the south and southeast of TW4-29; and relatively recently installed
well TW4-43 bounds chloroform to the southeast of TW4-29 and TW4-30. As discussed in
Section 4.1.1, ongoing, but slow, downgradient migration of chloroform from the southeastern
extremity of the plume into the vicinities of TW4-34 and TW4-35 is also consistent with the
small, but detectable, chloroform concentrations at these wells since the third quarters of 2022
and 2023, respectively.
From 2014 through 2019 chloroform concentrations at TW4-8 exceeded 70 µg/L and TW4-36
(non-detect for chloroform) served as an eastern bounding well. However, since the end of 2019,
26
chloroform at TW4-8 remained below 70 µg/L and continues to bound the chloroform plume to
the east.
4.2 Review of Analytical Results
4.2.1 Current Chloroform Isoconcentration Map
Included under Tab J of this Report is a current chloroform isoconcentration map for the Mill
site. Details of the gridding procedure used to generate the chloroform isoconcentration map
(consistent with Part 111.B.2.a through Part 111.B.2.c of the GCAP) are provided in Tab L.
4.2.2 Chloroform Concentration Trend Data and Graphs
Attached under Tab K are tables summarizing values for all required parameters, chloride,
nitrate/nitrite, carbon tetrachloride, chloroform, chloromethane, and methylene chloride, for each
well over time.
Attached under Tab Kare graphs showing chloroform concentration trends in each monitor well
over time.
The 2024 CACME report covers and interprets data collected through the fourth quarter of 2023.
As discussed in that report, since the third quarter of 2015, average chloroform concentrations
within the plume are trending downward; and, although noisy, concentrations at the majority of
the pumping wells within the plume are decreasing overall, including wells MW-4, MW-26,
TW4-4, TW4-20 (now abandoned), TW4-22, TW4-37, TW4-39 and TW4-41. In addition, since
the end of 2020, concentrations at nearly all non-pumping wells within ( or formerly within) the
plume are generally decreasing (including wells TW4-6, TW4-7, TW4-8, TW4-9, TW4-10,
TW4-16, TW4-26, TW4-29 and TW4-33). The overall decreasing trends at wells typically
having the highest concentrations (such as TW4-20 [now abandoned], TW4-22, TW4-37 and
TW4-39) are consistent with decreasing mass estimates for the plume as these wells are located
within areas having the highest concentrations and saturated thicknesses. Plume mass estimates
and trends are discussed in more detail below in Section 5.5.
4.2.3 Interpretation of Analytical Data
Comparing the chloroform analytical results to those of the previous quarter, as summarized in
the tables included under Tab K, the following observations can be made:
a) Chloroform concentrations have increased by more than 20% in the following wells
compared to last quarter: TW4-6 and TW4-35;
b) Chloroform concentrations decreased by more than 20% in the following well compared
to last quarter: MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-8, TW4-9, TW4-11,
TW4-19, TW4-21, TW4-22, TW4-30, TW4-37, TW4-39, TW4-40 and TW4-41;
27
c) Chloroform concentrations have remained within 20% in the following wells compared
to last quarter: TW4-5, TW4-7, TW4-10, TW4-16, TW4-18, TW4-24, TW4-26, TW4-
27, TW4-29 and TW4-33;
d) Chloroform concentrations have remained non-detect in the following wells: MW-32,
TW4-3, TW4-12, TW4-13, TW4-14, TW4-23, TW4-25, TW4-28, TW4-31, TW4-32,
TW4-36, TW4-38, TW4-42 and TW4-43;
e) Chloroform at TW4-35 increased from 2.2 µg/L to 3.7 µg/L; and
f) Chloroform at TW4-34 decreased from 1.4 µg/L to non-detect.
As indicated, chloroform concentrations at many of the wells with detected chloroform were
within 20% of the values reported for the wells during the previous quarter, suggesting that
variations are within the range typical for sampling and analytical error. Wells MW-4, MW-26,
TW4-1, TW4-2, TW4-4, TW4-6, TW4-8, TW4-9, TW4-11, TW4-19, TW4-21, TW4-22, TW4-
30, TW4-35, TW4-37, TW4-39, TW4-40 and TW4-41 had changes in concentration greater than
20%; and TW4-34 dropped to non-detect. Of these, 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; and TW4-22 is a nitrate pumping well. Non-pumping well TW4-6 is located near
chloroform pumping wells TW4-4 and TW4-41; Non-pumping well TW4-8 is located near
chloroform pumping wells MW-4, TW4-1 and TW4-2; TW4-9 is located near chloroform
pumping well TW4-39; TW4-30 is located just outside the chloroform plume boundary; and
TW4-34 and TW4-35 are located just downgradient of the chloroform plume boundary.
Fluctuations in concentrations at both chloroform and nitrate pumping wells and wells adjacent
to pumping wells likely result in part from changes in pumping. Fluctuations in concentrations
are also expected at wells located near the plume margins (such as TW4-30, TW4-34 and TW4-
35).
Chloroform pumping wells TW4-4 (1,190 µg/L); TW4-11 (3,200 µg/L); TW4-37 (10,300 µg/L);
TW4-41 (1,200 µg/L); and nitrate pumping well TW4-22 (2,140 µg/L) had the highest detected
chloroform concentrations. Although pumping well TW4-20, formerly located between pumping
wells TW4-19 and TW4-37, would typically have one of the highest concentrations, TW4-20
collapsed during August, 2020 and was abandoned in October, 2020.
Since last quarter, the chloroform concentrations in TW4-4 decreased from 1,620 to 1,190 µg/L;
TW4-11 decreased from 4,110 to 3,200 µg/L; TW4-37 decreased from 13,500 to 10,300 µg/L;
and TW 4-41 decreased from 1,660 to 1,200 µg/L. In addition, the chloroform concentration in
chloroform pumping well TW4-21 decreased from 1,210 to 866 µg/L; the concentration in
nitrate pumping well TW4-22 decreased from 3,670 to 2,140 µg/L; and the concentration in
nitrate pumping well TW4-24 increased from 66.2 to 76.4 µg/L, bringing it just within the plume
boundary this quarter. Nitrate pumping well TW4-25 remained non-detect. TW4-25, located
north of TW4-21, bounds the chloroform plume to the north.
Chloroform at TW4-8 (which was non-detect from the first quarter of 2008 through the fourth
quarter of 2013) decreased from approximately 5.5 µg/L to approximately 2.6 µg/L, and
28
remained outside the plume. TW4-8 is located immediately east of chloroform pumping well
MW-4, where chloroform was detected at a concentration of 1,160 µg/L. Although the plume
boundary remained between MW-4 and TW4-8 from the first quarter of 2005 through the fourth
quarter of 2013, TW4-8 was re-incorporated into the plume between the first quarter of2014 and
the fourth quarter of 2019. Elevated chloroform at TW4-8 was bounded to the north by TW4-3
and TW4-38 (both non-detect), to the northeast by TW4-13 (non-detect), to the east by TW4-36
(non-detect), and to the southeast by TW4-14 (which has remained below 10 µg/L and is non-
detect this quarter). Although previously elevated, TW4-8 has remained outside of and has
bounded the plume since the end of 2019. Changes in the plume boundary near TW4-8 are
expected to result from changes in pumping and reduced dilution resulting from cessation of
water delivery to the northern wildlife ponds.
Chloroform at TW4-29 (located at the southeastern extremity of the plume, to the east of TW4-
26 and to the south of TW4-27) increased slightly from 441 µg/L to 488 µg/L; and chloroform at
TW4-30, located immediately cross-gradient of TW4-29, decreased from approximately 38 µg/L
to 26 µg/L, remaining outside the plume. Chloroform at TW 4-14 remained non-detect and
chloroform at TW4-27 decreased slightly from 3 µg/L to 2.8 µg/L. Concentration trends at these
wells are generally consistent with ongoing, but slow, downgradient migration of chloroform at
these locations. For example, it took more than 51 quarters for detectable chloroform at TW4-4
to migrate approximately 400 feet downgradient to TW4-14; and it took more than 30 quarters
for chloroform exceeding 70 µg/L at TW4-29 to migrate approximately 160 feet to TW4-30. In
addition, although TW4-30 was previously downgradient of TW4-29, due to long-term changes
in water levels in this area, TW4-30 is now generally cross-gradient ofTW4-29.
Furthermore, as discussed in Section 4 .1.1, increased concentrations at TW 4-26 since the third
quarter of 2016 are also consistent with continuing downgradient chloroform migration which is
likely enhanced by the decay of the groundwater mound associated with the southern wildlife
pond. Increased concentrations at TW4-26 have widened the southeast extremity of the plume
which historically was narrow compared to more upgradient locations.
Chloroform at TW4-29 is · bounded to the north by TW4-27 (approximately 2.8 µg/L), to the
southeast by TW4-35 (approximately 3.7 µg/L), to the south by TW4-34 (non-detect), and to the
west-northwest by TW4-6 (approximately 3.3 µg/L) and TW4-23 (non-detect). As discussed
above, TW4-30, with a concentration of approximately 26 µg/L again bounds the plume to the
east of TW4-29, as it did prior to the fourth quarter of 2020. TW4-43, installed in September,
2021, served as a new bounding well during the period that concentrations at TW4-30 exceeded
70 µg/L. Continued monitoring will determine whether TW4-30 acts as a bounding well in the
future.
Chloroform at TW4-33 (located between TW4-4 and TW4-29) remained at approximately 40
µg/L. TW4-33 has remained outside the plume since the first quarter of 2021. Chloroform at
TW4-33 is bounded to the north by TW4-14 (non-detect), to the east by TW4-27 (approximately
2.8 µg/L), and to the west by TW4-6 (approximately 3.3 µg/L) and TW4-23 (non-detect).
The chloroform concentration in TW4-6 increased slightly from approximately 2 µg/L to 3.3
µg/L. TW4-6 has remained outside the chloroform plume since the third quarter of 2018.
29
Installed in the second quarter of 2000, TW 4-6 was the most downgradient temporary perched
well prior to installation of TW4-23 in 2007 and TW4-26 in the second quarter of 2010. TW4-6
remained outside the chloroform plume between installation in the second quarter of 2000 and
the fourth quarter of 2008 likely due to a combination of 1) slow rates of downgradient
chloroform migration in this area due to low permeability conditions and the effects of
upgradient chloroform removal by pumping, and 2) natural attenuation. TW4-6 was
subsequently incorporated into the plume twice: from the first quarter of 2009 through the third
quarter of 2010; and from the third quarter of 2014 through the second quarter of 2018. Between
initiation of pumping of TW4-4 in the first quarter of 2010 and the second quarter of 2014,
concentrations at TW4-6 showed a net decrease from 1,000 µg/L to 10.3 µg/L.
The relatively slow rate of chloroform migration in the vicinity of TW 4-6 in the past is
demonstrated by comparing the rate of increase in chloroform at this well to the rate of increase
in the nearest upgradient well TW4-4. Concentrations at TW4-4 increased from non-detect to
more than 2,200 µg/L within only two quarters whereas 16 quarters were required for
concentrations in TW4-6 to increase from non-detect to only 81 µg/L. This behavior is consistent
with hydraulic tests performed at TW4-4, TW4-6, and TW4-26 during the third quarter of 2010
that indicate a nearly two orders of magnitude decrease in permeability south (downgradient) of
TW4-4. Chloroform migration rates in the vicinities of wells TW4-26, TW4-29 and TW4-33
have been expected to be relatively slow due to upgradient pumping and relatively low
permeability conditions. By analogy with the decreases in concentration at TW4-6 and TW4-26
that occurred after initiation of TW4-4 pumping, chloroform concentrations at both TW4-29 and
TW4-33 have been expected to eventually trend downward; and recent data are consistent with
this expectation.
Although changes in concentration have occurred in wells within the chloroform plume, the
boundaries of the plume have not changed significantly since the last quarter, except for slight
expansion near TW4-24 and slight contractions between TW4-16 and TW4-24, and near TW4-
39. The slight expansion near TW4-24 was due to chloroform concentration increase at TW4-24;
and the contractions between TW4-16 and TW4-24 and near TW4-39 resulted from the
decreases in concentration at MW-26, TW4-37 and TW4-39. A slight contraction has also
occurred near TW4-40 due to decreases in concentrations at TW4-26 and TW4-40. As has been
the case since the first quarter of 2020, due primarily to decreases in concentrations at TW 4-6
and TW4-33, the kriging algorithm has 'pinched off the southern extremity of the plume.
TW 4-9 remained outside the plume from the second quarter of 2019 through the first quarter of
2021; was temporarily re-incorporated within the plume during the second quarter of 2021; and
remains outside the plume again this quarter. TW 4-9 was incorporated into the plume from the
first quarter of 2016 until the first quarter of 2019 due to increased concentrations attributable to
reduced recharge (and dilution) from the northern wildlife ponds. Prior to the first quarter of
2016, however, TW4-9 was outside the plume except during the fourth quarter of 2014.
Nitrate pumping generally caused the western boundary of the northern portion of the
chloroform plume to migrate to the west toward TW4-24. Since the first quarter of 2014, TW4-
24 has been both inside and outside the plume and is just within the plume this quarter. TW4-24
likely remained primarily outside the plume since 2014 due to initiation of TW4-37 pumping in
30
the second quarter of2015 and reduced productivity at TW4-24 (since the third quarter of 2014).
Subsequent to the first quarter of 2014, generally higher concentrations at TW4-6 and TW4-16
(both of which were within the chloroform plume in the past) caused the plume boundary to
migrate to the southwest and temporarily re-incorporate both wells. This increase was likely
related to reduced dilution from cessation of water delivery to the northern wildlife ponds and
more westerly flow induced by nitrate pumping. In addition, concentrations at TW4-6 are
expected to be influenced by reduced recharge at the southern wildlife pond and the decay of the
associated groundwater mound.
TW 4-6 has remained outside the plume since the third quarter of 2018 due to the general
decrease in chloroform concentrations since the third quarter of 2015, while (as discussed in
Section 4.1.5) TW4-16 has been both within and outside the plume. This quarter, although TW4-
6 remains outside the plume, TW4-16 remains just within the plume.
The decreasing trend in chloroform concentrations at TW4-6 since the third quarter of 2015, and
generally increased concentrations at TW4-26 since the third quarter of 2016, suggest that TW4-
4 pumping has arrested chloroform migration between TW 4-4 and TW 4-6, and that increased
chloroform at TW4-26 results from a remnant of the plume that continues to migrate south from
TW4-6 to TW4-26. This behavior is consistent with the apparent 'pinching-off of the southern
extremity of the plume since the end of 2019. Regardless, pumping at TW4-41, located adjacent
to TW4-4, and pumping at TW4-40, located just south (downgradient) of TW4-26, is expected to
slow or halt plume expansion in this area.
Although the nitrate pumping system may redistribute chloroform within the plume and cause
changes in the chloroform plume boundaries, continued operation of the nitrate pumping system
is expected to enhance capture associated with the chloroform pumping system. Furthermore,
since the beginning of 2015, the addition of chloroform wells TW4-l, TW4-2, TW4-ll, TW4-
21, TW4-37, TW4-39, TW4-40 and TW4-41 is expected to have a beneficial impact. Generally
reduced concentrations at TW4-6 (since the first quarter of 2015) and TW4-16 (since the fourth
quarter of 2014) after previous increases are likely the result of initiation of TW4-l, TW4-2, and
TW4-ll pumping during 2015. Maintaining reduced concentrations at TW4-6 is attributable
primarily to pumping at TW 4-41.
5.0 LONG TERM PUMP TEST AT MW-4, MW-26, TW4-19, TW4-20, AND TW4-4
OPERATIONS REPORT
5.1 Introduction
As a part of the investigation of chloroform contamination at the Mill site, 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. 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.
Beginning in January 2013, EFRI began long term pumping of TW4-22, TW4-24, TW4-25, and
TWN-02 as required by the Nitrate CAP, dated May 7, 2012 and the Stipulated Consent Order
31
(the "SCO") dated December 12, 2012. Because wells TW4-22, TW4-24, and TW4-25 are
chloroform program wells, they are included in this report and any chloroform removal realized
as part of this pumping is calculated and included in the chloroform quarterly reports.
Beginning on January 14, 2015, EFRI began long term pumping ofTW4-l, TW4-2, and TW4-l l
and began long term pumping ofTW4-21 and TW4-37 on June 9, 2015. Beginning in December
2016 EFRI began long term pumping of TW4-39. Beginning in April 2018 EFRI began long
term pumping ofTW4-41. Beginning in May 2019 EFRI began long term pumping ofTW4-40.
The following information documents the operational activities during the quarter.
5.2 Pump Test Data Collection
The long term pump test for MW-4 was started on April 14, 2003, followed by the start of
pumping from TW4-19 on April 30, 2003, from MW-26 on August 8, 2003, from TW4-20 on
August 4, 2005, from TW4-4 on January 31, 2010, and from TW4-22, TW4-24, and TW4-25 on
January 26, 2013. Personnel from Hydro Geo Chem, Inc. were on site to conduct the first phase
of the pump test and collect the initial two days of monitoring data for MW-4. EFRI personnel
have gathered subsequent water level and pumping data.
Analyses of hydraulic parameters and discussions of perched zone hydrogeology near MW-4 has
been provided by Hydro Geo Chem in a separate report, dated November 12, 2001, and in the
May 26, 2004 Final Report on the Long Term Pumping Test.
Data collected during the quarter included the following:
• Measurement of water levels at MW-4, TW4-l, TW4-2, TW4-4, TW4-ll, TW4-
19, MW-26, TW4-21, TWN-2, TW4-22, TW4-24, TW4-25, TW4-37, TW4-39
TW4-40, and TW4-41 on a weekly basis, and at selected temporary wells and
permanent monitoring wells on a monthly basis.
• Measurement of pumping history, including:
-pumping rates
-total pumped volume
-operational and non-operational periods.
• Periodic sampling of pumped water for chloroform and nitrate/nitrite analysis and
other constituents.
5.3 Water Level Measurements
Beginning August 16, 2003, the frequency of water level measurements from MW-4, MW-26,
and TW4-19 was reduced to weekly. From commencement of pumping, and regularly after
March 1, 2010 for TW4-4, water levels in these wells have been measured weekly. From
commencement of pumping, water levels in wells TW4-l, TW4-2, TW4-l l, TW4-21, TW4-22,
TW4-24, TW4-25, TW4-37, TW4-39, TW4-41, and TWN-2 have been measured weekly. Depth
to groundwater in all other chloroform contaminant investigation wells is monitored monthly.
Copies of the weekly Depth to Water monitoring sheets for MW-4, MW-26, TW4-l, TW4-2,
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TW4-11, TW4-19, TW4-21, TW4-4, TW4-22, TW4-24, TW4-25, TW4-37, TW4-39, TW4-40
(beginning May 2019), TW4-41 and TWN-2 and the monthly Depth to Water monitoring sheets
for the chloroform contaminant investigation wells and the selected temporary wells and
permanent monitoring wells are included under Tab C. Monthly depth to water measurements for
the quarter are recorded in the Field Data Worksheets included under Tab C.
5.4 Pumping Rates and Volumes
Table G-2 summarizes the recovered mass of chloroform by well per quarter and historically
since the inception of the chloroform recovery program for the active pumping wells. It is
important to note that TWN-02 is a nitrate program well and is sampled only for nitrate and
chloride as required by the nitrate program. Because TWN-02 is not sampled or analyzed for
chloroform, the mass of chloroform recovered is not calculated.
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 transferred to a holding tank. The water in the holding tank is used in the Mill processes. The
pumping rates and volumes for each of the pumping wells are shown in Table G-3. Specific
operational problems observed with the well or pumping equipment which occurred during the
quarter are noted for each well below.
5.4.1 TW 4-22 and TW 4-24
During the September 3, • 2024 inspection, wells TW4-22 and TW4-24 were found without
power. An electrician was contacted who came out to the wells and restored power. The issue
was addressed within 24 hours of discovery and as such no notifications were necessary.
5.5 Mass Removed and Plume Residual Mass
Chloroform removal was estimated as of the first quarter 2007. Since that estimation, the mass
removed by well for each quarter has been compiled in Table G-2, which shows the pounds of
chloroform that have been removed to date. The mass of chloroform removed from the plume
this quarter is approximately 7 .6 lb., which is approximately 31 % less than the approximately
11.1 lb. removed last quarter. The smaller rate of mass removal is attributable primarily to the
decreased concentrations at MW-26, TW4-37 and TW4-39.
The residual mass of chloroform within the plume is estimated as 511 lb. using the methodology
described in Appendix A of the GCAP ("Chloroform Plume Mass Calculation Method"). This is
approximately 454 lb. smaller than last quarter's estimate of 965 lb, due primarily to decreased
concentrations at MW-4, MW-26, TW4-22, TW4-37 and TW4-39. As per Part III.B.2 of the
GCAP, electronic files used in calculating the mass estimate are provided with this report.
Details of the procedure are provided in Tab L.
The residual mass is plotted in Figure L.1. Subsequent residual plume mass estimates will be
calculated quarterly, added to the graph, and the trendline updated as per Part III.B.3 of the
GCAP.
33
Based on data presented in the 2024 CACME Report, the calculated chloroform mass increased
after the cessation of water delivery to the two northern wildlife ponds in the first quarter of
2012. These ponds are located immediately upgradient of the chloroform plume. The increase in
calculated mass resulted from increased plume area and increased average concentrations within
the plume. The increases in both plume area and average concentrations are attributable to
reduced dilution due to the reduction in chloroform-free wildlife pond seepage.
However, the residual mass estimates have generally decreased since the second quarter of 2016
maximum estimate of 2,261 lb. suggesting stabilization and decline; and, although the residual
mass estimates have generally been larger since 2012, the rate of mass removed per quarter by
pumping has also been generally larger. Mass removal rates were particularly enhanced after the
addition of 5 new pumping wells in 2015; and the subsequent addition of 3 additional pumping
wells has helped maintain mass removal rates. Furthermore, although the pumping system is not
designed to hydraulically capture the entire plume, the proportion of the mass of the plume under
capture has historically been large. The proportion of the mass of the plume under capture during
the fourth quarters of 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023
and 2024 ranged from approximately 84% to 99%.
The approximate proportion of the mass of the plume under capture this quarter is 98%, which is
the same as last quarter's approximately 98%. The similarity is primarily attributable to the
similarities in total capture area within the northern portion of the plume having the highest
concentrations (near TW4-22and TW4-37).
As discussed above, the residual mass estimates have been generally larger since the cessation of
water delivery to the two northern wildlife ponds in the first quarter of 2012; however, both the
first quarter 2023 mass estimate (444 lb.) and the first quarter 2024 mass estimate (461 lb.) were
smaller than the first quarter, 2012 mass estimate of 492 lb. Although generally larger, mass
estimates since the first quarter of 2023 are nevertheless consistent with the general decrease in
residual mass estimates since the mid-2016 maximum estimate.
5.6 Inspections
All of the required inspections were completed, and the inspection forms are included in Tab C.
5.7 Conditions That May Affect Water Levels in Piezometers
No water was added to the any of the wildlife ponds during the quarter.
6.0 CORRECTIVE ACTION REPORT
No corrective actions were necessary for the current reporting period.
6.1 Assessment of Previous Quarter's Corrective Actions
There were no corrective actions required during the previous quarters' monitoring period.
34
7.0 CURRENT COMPLIANCE STATUS
7.1 Long Term Chloroform Plume Control
The chloroform plume is currently entirely within the Mill property boundary and is bounded on
all sides by wells having chloroform concentrations that are either non-detect or less than 70
µg/L (Tab J). The chloroform plume is bounded to the north by TW4-25 (non-detect); to the
west and southwest by MW-28 (non-detect), MW-31 (non-detect), MW-32 (non-detect), TW4-6
(approximately 3 µg/L) and TW4-23 (non-detect); to the east by TW4-3 (non-detect), TW4-5
(approximately 8.6 µg/L), TW4-8 (approximately 2.6 µg/L), TW4-9 (approximately 2.3 µg/L),
TW4-13 (non-detect), TW4-14 (non-detect), TW4-18 (approximately 47 µg/L), TW4-27
(approximately 3 µg/L), TW4-30 (approximately 26 µg/L), TW4-33 (approximately 40 µg/L);
TW4-36 (non-detect) and TW4-38 (non-detect); to the south by TW4-34 (non-detect) and TW4-
42 (non-detect); and to the southeast by TW4-35 (approximately 3.7 µg/L) and TW4-43 (non-
detect).
Chloroform at TW4-34 was not detected until the third quarter of 2022 (at 1.2 µg/L). Since that
first detection, chloroform has been detected four additional times at concentrations ranging up
to last quarter's concentration of 1.4 µg/L, although TW4-34 is again non-detect this quarter. In
addition, chloroform at nearby well TW4-35 was detected for the first time during the third
quarter of 2023 ( at 1.4 µg/L ), and has been detected each quarter since then, including during the
current quarter at 3.7 µg/L. Chloroform detections at TW4-34 and TW4-35 are consistent with
continuing, but slow, downgradient plume migration.
However, chloroform is not detected at wells far to the south (cross-to downgradient) and
southwest (cross-gradient) of the plume. MW-17 (non-detect) and MW-38 (non-detect) bound
the plume to the far southwest (cross-gradient); and MW-22 (non-detect), MW-39 (non-detect)
and MW-40 (non-detect) bound the plume far to the south (cross-to downgradient).
Because TW4-30 no longer bounded the plume immediately to the east due to increases in
concentration that brought TW4-30 into the plume for the first time during the fourth quarter of
2020, new bounding well TW4-43 was installed approximately 200 feet to the east-southeast of
TW4-30 during September, 2021. As indicated above, chloroform has not been detected at TW4-
43; and, due to decreases in chloroform concentrations since 2021, TW4-30 has been outside the
plume since the third quarter of 2022. Subsequent data will determine whether or not TW4-30
remains outside the plume and can serve (as in the past) as a bounding well.
Data collected to date indicate there are sufficient chloroform monitoring and pumping wells to
effectively define, control, and monitor the plume. In addition, site water level data indicate that
perched groundwater flow to the east of TW4-30, between TW4-30 and the eastern site property
boundary, is to the south-southwest; therefore it is unlikely that any chloroform within this
portion of the plume could ever migrate across the eastern property boundary. Furthermore,
chloroform in the vicinity of TW4-30 is migrating relatively slowly; it took more than 30
quarters for chloroform exceeding 70 µg/L at TW4-29 to migrate approximately 160 feet to
TW4-30. Due to long-term changes in water levels in this area, the former hydraulic gradient that
was directed from TW4-29 toward TW4-30 no longer exists; consequently, chloroform is no
longer expected to migrate from TW4-29 to TW4-30, consistent with the generally decreasing
35
trend in chloroform since 2021 that has brought TW4-30 outside the plume since the third
quarter of 2022. Finally, the groundwater flow direction in the immediate vicinity of TW4-30 is
now south-southeasterly, generally toward TW4-35 and TW4-43. This quarter, TW4-43 is non-
detect for chloroform while, as discussed above, chloroform was detected at TW 4-3 5 for the fifth
time this quarter (at 3.7 µg/L).
7.2 Well Construction, Maintenance and Operation
Part II of the GCAP specifies that EFRI must construct, maintain, and operate the chloroform
wells in accordance with the specifications delineated therein. The wells were maintained and
operated as required. Additional details regarding any specific pumping well operations and
maintenance issues noted during the quarter are discussed in Section 5.0 above.
7.3 Disposal of Extracted Groundwater
Part II of the GCAP requires that all extracted groundwater be disposed of in the tailings
management system or fed in the Mill process. All extracted groundwater was handled as
required by the GCAP.
7.4 Compliance Well Performance
Part ILG of the GCAP states that an exceedance of the compliance well performance standard is
defined as the presence of chloroform in any compliance monitoring well in excess of 70 ug/L
for two or more quarters.
The compliance well chloroform concentrations were below the 70 ug/L except as noted in
previous reports. The previously noted exceedances have been addressed in Plans and Time
Schedules. There are no new exceedances in Q3 2024.
7.5 Chloroform Plume Monitoring for Wells within 500 Feet of the Property Boundary
Currently there are no compliance wells within 500 feet of the property boundary.
8.0 CONCLUSIONS AND RECOMMENDATIONS
The residual mass of chloroform within the plume is estimated as 511 lb. using the methodology
described in Appendix A of the GCAP ("Chloroform Plume Mass Calculation Method"). This is
454 lb. smaller than last quarter's estimate of 965 lb., attributable primarily to decreased
concentrations at chloroform pumping wells MW-4, MW-26, TW4-22, TW4-37 and TW4-39.
Since the third quarter of 2015, the residual mass estimate trend is downward; and the current
quarter's estimate of 511 lb. is substantially lower than both the third quarter 2015 estimate of
1,712 lb., and the maximum of2,261 lb. estimated for the second quarter of 2016.
In addition, although the residual mass estimates have generally been larger since cessation of
water delivery to the wildlife ponds in 2012, the first quarter 2023 mass estimate (444 lb.) and
the first quarter 2024 mass estimate (461 lb.) were smaller than the first quarter, 2012 mass
estimate of 492 lb. However, although generally larger, mass estimates since the first quarter of
36
2023 are consistent with the general decrease in residual mass estimates since the mid-2016
maximum.
The mass of chloroform removed from the plume this quarter by pumping, approximately 7 .6
lb., is approximately 31 % smaller than the mass removed last quarter (approximately 11.1 lb.).
The smaller mass removal is attributable primarily to the decreased concentrations at chloroform
pumping wells MW-26, TW4-37 and TW4-39.
The chloroform plume is currently entirely within the Mill property boundary and is bounded on
all sides by wells having chloroform concentrations that are either non-detect or less than 70
µg/L (Tab J). The chloroform plume is bounded to the north by TW4-25 (non-detect); to the
west and southwest by MW-28 (non-detect), MW-31 (non-detect), MW-32 (non-detect), TW4-6
(approximately 3 µg/L) and TW4-23 (non-detect); to the east by TW4-3 (non-detect), TW4-5
(approximately 8.6 µg/L), TW4-8 (approximately 2.6 µg/L), TW4-9 (approximately 2.3 µg/L),
TW4-13 (non-detect), TW4-14 (non-detect), TW4-18 (approximately 47 µg/L), TW4-27 (nearly
3 µg/L), TW4-30 (approximately 26 µg/L), TW4-33 (approximately 40 µg/L); TW4-36 (non-
detect) and TW4-38 (non-detect); to the south by TW4-34 (non-detect) and TW4-42 (non-
detect); and to the southeast by TW4-35 (approximately 3.7 µg/L) and TW4-43 (non-detect).
Because TW4-30 no longer bounded the plume immediately to the east due to increases in
concentration that brought TW4-30 into the plume for the first time during the fourth quarter of
2020, new bounding well TW4-43 was installed approximately 200 feet to the east-southeast of
TW4-30 during September, 2021. As indicated above, chloroform has not been detected at TW4-
43. However, due to concentration decreases since 2021, TW4-30 has been outside the plume
since the third quarter of 2022, and again bounds the plume to the east. Subsequent data will
determine whether or not TW4-30 remains outside the plume and can serve (as in the past) as a
bounding well in the future.
Data collected to date indicate there are sufficient chloroform monitoring and pumping wells to
effectively define, control, and monitor the plume. In addition, site water level data indicate that
perched groundwater flow to the east of TW4-30, between TW4-30 and the eastern site property
boundary, is to the south-southwest; therefore, it is unlikely that any chloroform within this
portion of the plume could ever migrate across the eastern property boundary. Furthermore,
chloroform in the vicinity of TW4-30 is migrating relatively slowly; it took more than 30
quarters for chloroform exceeding 70 µg/L at TW 4-29 to migrate approximately 160 feet to
TW4-30. Due to long-term changes in water levels in this area, the former hydraulic gradient that
was directed from TW4-29 toward TW4-30 no longer exists; consequently, chloroform is no
longer expected to migrate from TW4-29 to TW4-30, consistent with the concentration decreases
since 2021 that have brought TW4-30 again outside the plume. Finally, the groundwater flow
direction in the immediate vicinity of TW4-30 is now south-southeasterly, generally toward
TW4-35 and TW4-43, at which chloroform concentrations are low and non-detect, respectively.
The water level contour maps for the second quarter of 2024 indicate effective capture of water
containing high chloroform concentrations over most of the chloroform plume. Capture in the
southeastern portion of the plume (vicinity of MW-4) was enhanced by start-up of chloroform
pumping wells TW4-l, TW4-2, and TW4-11 during the first quarter of 2015. Capture in the
37
northwestern portion of the plume was enhanced by start-up of chloroform pumping wells TW4-
21 and TW4-37 during the second quarter of 2015; and ofTW4-39 during the fourth quarter of
2016. Capture in the southernmost portion of the plume was enhanced by start-up of pumping at
TW4-41 during the second quarter of 2018 and of TW4-40 during the second quarter of 2019.
All pumping wells added since the beginning of 2015 have enhanced the effectiveness of
chloroform mass removal.
Although pumping began in the first quarter of 2010, a well-defined capture zone was not clearly
evident at chloroform pumping well TW4-4 until the third quarter of 2018. Increased drawdowns
in this area since the second quarter of 2018, and development of a definable capture zone, is
attributable to pumping at adjacent well TW4-41.
The capture zone associated with TW4-4 was likely obscured prior to the second quarter of 2018
by the historically relatively low water level at adjacent well TW4-14 and the two orders of
magnitude decrease in permeability south of TW4-4. However, as noted in previous reports,
between the first quarter of 2010 and the second quarter of 2014, decreases in chloroform
concentrations and the rate of water level rise at TW 4-6 (located downgradient of TW 4-4) likely
resulted from TW 4-4 pumping.
Cones of depression associated with the nitrate pumping wells became evident as of the fourth
quarter of 2013, and capture associated with the nitrate pumping is expected to continue to
develop. Overall, the apparent capture area of the combined chloroform and nitrate pumping
systems is larger than last quarter.
'Background' flow through the chloroform plume was calculated in the 2016 CACME as
approximately 3 .4 gpm Due to continued reductions in hydraulic gradients and saturated
thicknesses since then, the 'background' flow was recalculated in the 2024 CACME as 2.24
gpm. Pumping from wells within and immediately adjacent to the chloroform plume during the
current quarter (from wells MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-11, TW4-19, TW4-
21, TW4-22, TW4-24, TW4-37, TW4-39, TW4-40 and TW4-41) is approximately 4.4 gpm. The
combined pumping rate of 4.4 gpm exceeds the calculated background flow by nearly 2.2 gpm or
nearly 98%, and is considered adequate at the present time.
Chloroform concentrations at many of the wells with detected chloroform were within 20% of
the values reported during the previous quarter, suggesting that variations are within the range
typical for sampling and analytical error. Wells MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-
6, TW4-8, TW4-9, TW4-11, TW4-19, TW4-21, TW4-22, TW4-30, TW4-35, TW4-37, TW4-39,
TW4-40 and TW4-41 had changes in concentration greater than 20%; and TW4-34 dropped to
non-detect. Of these, 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; and TW4-22 is a nitrate
pumping well. Non-pumping well TW4-6 is located near chloroform pumping wells TW4-4 and
TW4-41; Non-pumping well TW4-8 is located near chloroform pumping wells MW-4, TW4-1
and TW4-2; TW4-9 is located near chloroform pumping well TW4-39; TW4-30 is located just
outside the chloroform plume boundary; and TW4-34 and TW4-35 are located just downgradient
of the chloroform plume boundary. Fluctuations in concentrations at both chloroform and
nitrate pumping wells and wells adjacent to pumping wells likely result in part from changes in
38
pumping. In addition, fluctuations in concentrations are expected at wells located near the plume
margins (such as TW4-30, TW4-34 and TW4-35). Furthermore, changes in concentrations at
chloroform wells are expected to result from continued operation of the nitrate pumping system,
as the capture associated with nitrate pumping expands and flow directions change locally.
Chloroform pumping wells TW4-4 (1,190 µg/L); TW4-11 (3,200 µg/L); TW4-37 (10,300 µg/L);
TW4-41 (1,200 µg/L); and nitrate pumping well TW4-22 (2,140 µg/L) had the highest detected
chloroform concentrations. Since last quarter, the chloroform concentration in TW4-4 decreased
from 1,620 to 1,190 µg/L; TW4-11 decreased from 4,110 to 3,200 µg/L; TW4-37 decreased
from 13,500 to 10,300 µg/L; and TW4-41 decreased from 1,660 to 1,200 µg/L. In addition, the
chloroform concentration in chloroform pumping well TW4-21 decreased from 1,210 to 866
µg/L; the concentration in nitrate pumping well TW4-22 decreased from 3,670 to 2,140 µg/L;
and the concentration in nitrate pumping well TW4-24 increased from 66.2 to 76.4 µg/L,
bringing it just within the plume boundary this quarter. Nitrate pumping well TW4-25 remained
non-detect. TW4-25, located north ofTW4-21, bounds the chloroform plume to the north.
Chloroform at TW4-8 (which was non-detect from the first quarter of 2008 through the fourth
quarter of 2013) decreased from approximately 5.5 µg/L to approximately 2.6 µg/L, and
remained outside the plume. TW4-8 is located immediately east of chloroform pumping well
MW-4, where chloroform was detected at a concentration of 1,160 µg/L. Although the plume
boundary remained between MW-4 and TW 4-8 from the first quarter of 2005 through the fourth
quarter of 2013, TW4-8 was re-incorporated into the plume between the first quarter of 2014 and
the fourth quarter of 2019. Elevated chloroform at TW4-8 was bounded to the north by TW4-3
and TW4-38 (both non-detect), to the northeast by TW4-13 (non-detect), to the east by TW4-36
(non-detect), and to the southeast by TW4-14 (which has remained below 10 µg/L and is non-
detect this quarter). Although previously elevated, TW4-8 has remained outside of and has
bounded the plume since the end of 2019. Changes in the plume boundary near TW4-8 are
expected to result from changes in pumping and reduced dilution resulting from cessation of
water delivery to the northern wildlife ponds.
Detectable chloroform concentrations at TW 4-14 (between the fourth quarter of 2014 and the
first quarter of2021; and during the third quarter of2022) and at TW4-27 (since the third quarter
of 2015) are consistent with continued, but slow, downgradient migration of chloroform from the
distal end of the plume (near TW4-29 and TW4-33) into the low permeability materials
penetrated by TW4-14 and TW4-27. Chloroform at TW4-14 remained non-detect and
chloroform at TW4-27 decreased slightly from 3 µg/L to 2.8 µg/L. Pumping at TW4-41 1s
expected to reduce or prevent future migration of chloroform toward these wells.
Concentration trends at TW4-29 (located at the southeastern extremity of the plume, to the east
ofTW4-26 and to the south of TW4-27); and at TW4-30 (located immediately east ofTW4-29),
are also generally consistent with ongoing, but slow, downgradient migration of chloroform.
Although previously downgradient of TW4-29, due to long-term changes in water levels in this
area, TW4-30 is now generally cross-gradient of TW4-29. Chloroform at TW4-29 increased
slightly from 441 µg/L to 488 µg/L; and chloroform at TW4-30, located immediately cross-
gradient of TW4-29, decreased from approximately 38 µg/L to 26 µg/L, remaining just outside
the plume. As discussed above, slow downgradient migration is consistent with the more than 30
39
quarters needed for chloroform exceeding 70 µg/L at TW4-29 to migrate approximately 160 feet
to TW4-30 (although TW4-30 is again outside the plume).
Chloroform at TW4-29 is bounded to the north by TW4-27 (approximately 3 µg/L), to the
southeast by TW4-35 (approximately 3.7 µg/L), to the south by TW4-34 (non-detect), and to the
west-northwest by TW4-6 (approximately 3 µg/L) and TW4-23 (non-detect). As discussed
above, TW4-30 no longer bounded the plume immediately to the east and TW4-43 has acted as a
new bounding well in this area; however, due to decreased concentrations, TW4-30 has bounded
the plume to the east since the third quarter of 2022. In addition, generally increased
concentrations at TW4-26 since the third quarter of 2016 are consistent with continuing
downgradient chloroform migration, which is likely enhanced by the decay of the groundwater
mound associated with the southern wildlife pond. Furthermore, recent detections in chloroform
at TW4-34 (since the second quarter of 2022); and at TW4-35 (since the third quarter of 2023),
although small (< 4 µg/L), are also consistent with continuing, but slow, downgradient plume
migration.
Chloroform at TW4-33 (located between TW4-4 and TW4-29), which has remained below 70
µg/L since the first quarter of 2021, maintained a concentration of approximately 40 µg/L.
Chloroform at TW4-33 is bounded to the north by TW4-14 (non-detect), to the east by TW4-27
(approximately 3 µg/L), and to the west by TW4-6 (approximately 3 µg/L) and TW4-23 (non-
detect).
Although changes in concentration have occurred in wells within the chloroform plume, the
boundaries of the plume have not changed significantly since the last quarter, except for slight
expansion near TW4-24 and slight contractions between TW4-16 and TW4-24, and near TW4-
39. The slight expansion near TW4-24 was due to chloroform concentration increase at TW4-24;
and the contractions between TW4-16 and TW4-24 and near TW4-39 resulted from the
decreases in concentration at MW-26, TW4-37 and TW4-39. A slight contraction has also
occurred near TW4-40 due to decreases in concentrations at TW4-26 and TW4-40. As has been
the case since the first quarter of 2020, due primarily to decreases in concentrations at TW 4-6
and TW4-33, the kriging algorithm has 'pinched off the southern extremity of the plume.
TW4-9 remained outside the plume from the second quarter of 2019 through the first quarter of
2021; was temporarily re-incorporated within the plume during the second quarter of 2021; and
remains outside the plume again this quarter. TW 4-9 was incorporated into the plume from the
first quarter of 2016 until the first quarter of 2019 due to increased concentrations attributable to
reduced recharge (and dilution) from the northern wildlife ponds. However, except for the fourth
quarter of 2014, TW4-9 was outside the plume prior to the first quarter of 2016. TW4-38 was
installed to the east-southeast of TW 4-9 to serve as a bounding well when concentrations at
TW4-9 exceeded 70 µg/L.
Nitrate pumping generally caused the western boundary of the northern portion of the
chloroform plume to migrate to the west toward TW4-24. Since the first quarter of 2014, TW4-
24 has been both inside and outside the plume and is just within the plume this quarter. TW4-24
likely remained primarily outside the plume since 2014 due to initiation of TW4-37 pumping in
the second quarter of2015 and reduced productivity at TW4-24 (since the third quarter of 2014).
40
Subsequent to the first quarter of 2014, generally increased concentrations at TW4-6 and TW4-
16 (both of which were within the chloroform plume in the past), caused the plume boundary to
migrate to the southwest and temporarily re-incorporate both wells. Increased concentrations at
these wells subsequent to the first quarter of 2014 are likely related to reduced dilution from
cessation of water delivery to the northern wildlife ponds and more westerly flow induced by
nitrate pumping. In addition, concentrations at TW4-6 are expected to be influenced by reduced
recharge at the southern wildlife pond and the decay of the associated groundwater mound.
Since 2014, TW4-16 has been both within and outside the plume; whereas a decreasing trend in
chloroform concentrations at TW4-6 (since the third quarter of 2015) has once again taken TW4-
6 outside the plume. This quarter, TW4-16 and TW4-6 remain within and outside the plume,
respectively. Although chloroform at TW4-16 has been above and below 70 µg/L since 2014,
and was detected at approximately 94 µg/L this quarter, concentrations have been higher since
2018, likely in response to reduced dilution.
The decreasing trend in chloroform concentration at TW4-6 since the third quarter of 2015, and
generally increased concentrations at TW4-26 since the third quarter of 2016, suggest that TW4-
4 pumping has arrested chloroform migration between TW 4-4 and TW 4-6, and that the increased
chloroform at TW4-26 results from a remnant of the plume that continues to migrate south from
TW4-6 to TW4-26. Pumping at adjacent well TW4-41 since the second quarter of 2018 has
likely enhanced the decline in TW 4-6 concentrations to less than 70 µg/L.
Although the nitrate pumping system may redistribute chloroform within the plume and cause
changes in the chloroform plume boundaries, continued operation of the nitrate pumping system
is expected to enhance capture associated with the chloroform pumping system. Furthermore, the
addition of chloroform pumping wells TW4-1, TW4-2, TW4-11, TW4-21, TW4-37, TW4-39,
TW4-40 and TW4-41 since the beginning of 2015 is expected to have a beneficial impact.
Generally reduced concentrations at TW4-6 (since the third quarter of 2015) and TW4-16 (since
the fourth quarter of 2014) after previous increases are likely the result of initiation of TW4-1,
TW4-2, and TW4-11 pumping.
Continued operation of the original chloroform pumping wells (MW-4, MW-26, and TW4-19) is
recommended. Pumping these wells, regardless of any short-term fluctuations in concentrations
detected at the wells, helps to reduce downgradient chloroform migration by removing
chloroform mass and reducing hydraulic gradients, thereby allowing natural attenuation to be
more effective.
Continued operation of chloroform pumping well TW4-4, augmented by pumping at adjacent
well TW4-41, is recommended to improve capture of chloroform to the extent practical in the
southern portion of the pl~e. The overall decrease in chloroform concentrations at TW4-6 from
1,000 µg/L in the first quarter of 2010 to 10.3 µg/L in the second quarter of2014 is likely related
to pumping at TW4-4. The decrease in the long-term rate of water level rise at TW4-6 once
TW4-4 pumping began, which suggests that TW4-6 is within the hydraulic influence of TW4-4,
is also consistent with the decrease in chloroform concentrations at TW 4-6 between the first
quarter of 2010 and the second quarter of 2014. The decreasing trend in water levels beginning
in 2014 and, as noted above, the generally decreasing chloroform concentrations since the first
41
quarter of 2015 at TW 4-6 are also attributable in part to TW 4-4 ( augmented by TW 4-41)
pumpmg.
Continued operation of chloroform pumping wells TW4-1, TW4-2, TW4-11, TW4-21, TW4-37,
TW4-39, TW4-40 and TW4-41 is also recommended because pumping these wells has increased
overall capture and improved chloroform mass removal. In particular, continued pumping of
TW4-37 (in conjunction with TW4-19) compensates for the loss of TW4-20; and pumping at
TW4-40 has expanded capture within the southern extremity of the plume.
Furthermore, because of the influence of TW4-4 pumping (augmented by TW4-41 pumping
since the second quarter of2018), and by analogy with the concentration decreases at TW4-6 and
TW4-26 that occurred after initiation of TW4-4 pumping, chloroform concentrations at TW4-29
and TW4-33 were expected to eventually trend downward. Since the third quarter of 2014, TW4-
33 concentrations that have been relatively stable to decreasing; and TW4-29 concentrations that
generally increased before becoming relatively stable to decreasing; appear consistent with these
expectations. As discussed above, trends at these wells suggest that chloroform migration has
been arrested at TW4-33 by TW4-4 (and TW4-41) pumping and that previously increasing
chloroform at downgradient well TW4-29 resulted from a remnant of the plume that migrated
past TW4-33 generally toward TW4-30, which until recently was downgradient of TW4-29, and
which until the fourth quarter of 2020 bounded the plume to the east. As discussed above, due to
concentration decreases since 2021, TW4-30 again bounds the plume to the east; and continued
monitoring will determine whether it can function (as in the past) as a bounding well in the
future.
The influence of TW 4-4 pumping at the distal end of the plume is consistent with decreasing
water levels at both TW4-29 and TW4-33. Pumping at adjacent well TW4-41 has been expected
to help maintain or enhance these decreasing trends in water levels and to augment the expected
eventual reductions in concentrations in the distal end of the plume. Continued evaluation of
trends at TW4-29 and TW4-33 will be provided in subsequent quarters.
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 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 has caused the expected decrease in hydraulic
gradients and the increases in constituent concentrations within the chloroform plume. Generally
increased chloroform concentrations at TW4-6 (between 2013 and 2020); and at TW4-8, TW4-9
and TW4-16 (since 2013), are likely related in part to reduced dilution (although concentrations
at TW4-6 and TW4-8 have been trending downward since the first quarter of 2015; and
concentrations at TW4-9 have been trending generally downward since the first quarter of 2018).
As discussed above, increased concentrations at TW4-26 since the third quarter of 2016 that are
consistent with continuing downgradient chloroform migration are also likely enhanced by the
decay of the groundwater mound associated with the southern wildlife pond.
42
The net impact of reduced wildlife pond recharge has been expected to be beneficial even though
it was also expected to result in (temporarily) higher concentrations that would persist until
continued mass reduction via pumping and natural attenuation ultimately reduced concentrations.
Temporary increases in chloroform concentrations have been judged less important than reduced
chloroform migration rates. The evolution of the impacts of reduced recharge on concentrations
and plume migration rates will be defined by continued monitoring.
9.0 ELECTRONIC DATA FILES AND FORMAT
EFRI has provided to the Director an electronic copy of the laboratory results for groundwater
quality monitoring conducted under the chloroform contaminant investigation during the quarter,
in Comma Separated Values format. A copy of the transmittal e-mail is included under Tab M.
43
Tables
Table 1: Summary of Well Sampling for the Period
Well SamnleDate Date of Lab Renort
MW-04 8/20/2024 9/10/2024
TW4-0l 8/20/2024 9/10/2024
TW4-02 8/20/2024 9/10/2024
TW4-03 9/12/2024 9/25/2024
TW4-04 8/20/2024 9/10/2024
TW4-05 9/18/2024 10/3/2024 (10/3/2024)
TW4-06 9/17/2024 10/3/2024 (10/3/2024)
TW4-07 9/18/2024 10/3/2024 (10/3/2024)
TW4-08 9/17/2024 10/3/2024 (10/3/2024)
TW4-09 9/17/2024 10/3/2024 (10/3/2024)
TW4-10 9/18/2024 10/3/2024 (1013/2024)
TW4-11 8/20/2024 9/10/2024
TW4-12 9/12/2024 9/25/2024
TW4-12R 9/11/2024 9/25/2024
TW4-13 9/12/2024 9/25/2024
TW4-14 9/12/2024 9/25/2024
MW-26 8/20/2024 9/10/2024
TW4-16 9/18/2024 10/3/2024 (10/3/2024)
MW-32 9/16/2024 10/3/2024 (10/3/2024)
TW4-18 9/18/2024 10/3/2024 (10/3/2024)
TW4-19 8/20/2024 9/10/2024
TW4-21 8/20/2024 9/10/2024
TW4-22 8/20/2024 9/10/2024
TW4-23 9/17/2024 10/3/2024 (10/3/2024)
TW4-24 8/20/2024 9/10/2024
TW4-25 8/20/2024 9/10/2024
TW4-26 9/18/2024 10/3/2024 (10/3/2024)
TW4-27 9/17/2024 10/3/2024 (10/3/2024)
TW4-28 9/12/2024 9/25/2024
TW4-29 9/18/2024 10/3/2024 (I 0/3/2024)
TW4-30 9/18/2024 10/3/2024 (10/3/2024)
TW4-30R 9/17/2024 10/3/2024 (10/3/2024)
TW4-31 9/12/2024 9/25/2024
TW4-32 9/12/2024 9/25/2024
TW4-33 9/18/2024 10/3/2024 (10/3/2024)
TW4-34 9/17/2024 10/3/2024 (10/3/2024)
TW4-35 9/17/2024 10/3/2024 (10/3/2024)
TW4-36 9/12/2024 9/25/2024
TW4-37 8/20/2024 9/10/2024
TW4-38 9/17/2024 10/3/2024 (10/3/2024)
TW4-39 8/20/2024 9/10/2024
TW4-40 8/20/2024 9/10/2024
TW4-41 8/20/2024 9/10/2024
TW4-42 9/12/2024 9/25/2024
TW4-43 9/17/2024 10/3/2024 (10/3/2024)
TW4-60 8/20/2024 9/10/2024
TW4-65 9/12/2024 9/25/2024
TW4-70 9/17/2024 10/3/2024 (10/3/2024)
TW4-75 9/18/2024 10/3/2024 (10/3/2024)
All sample locations were sampled for Chloroform, Carbon Tetrachloride, Chloromethane, Methylene
Chloride, Chloride and Nitrogen.
Date in parantheses is the date the analytical data package was resubmitted by the laboratory. The
package was resubmitted to correct an error.
"R" following a well number deisgnates a rinsate sample collected prior to purging of the well of that
number.
TW4-60 is a DI Field Blank, TW4-65 is a duplicate ofTW4-12, and TW4-70 is a duplicate ofTW4-08
and TW4-75 is a duplicate ofTW4-18.
Highlighted wells are continuously pumped.
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 Weekly and Monthly Depth to Water Data
Tab D Kriged Current Quarter Groundwater Contour Map, Capture Zone Map, Capture Zone Details
Map, and Depth to Water Data
Tab E Kriged Previous Quarter Groundwater Contour Map
Tab F Depths to Groundwater and Elevations and Hydrographs of Groundwater Elevations over Time
for Chloroform Monitoring Wells
Tab G Chloroform Mass Removed and Volume Pumped in Chloroform Pumping Wells over Time
Tab H Laboratory Analytical Reports
Tab I Quality Assurance and Data Validation Tables
I-1 Field Data QA/QC Evaluation
I-2 Holding Time Evaluation
I-3 Receipt Temperature Check
I-4 Analytical Method Check
I-5 Reporting Limit Evaluation
I-6 Trip Blank Evaluations
I-7 QA/QC Evaluation for Sample Duplicates
I-8 QC Control Limits for Analyses and Blanks
I-9 Rinsate Check
Tab J Kriged Current Quarter Chloroform Isoconcentration Map
Tab K Analyte Concentration Data and Chloroform Concentration Trend Graphs over Time
Tab L Contour Map Based Chloroform Plume Mass Calculations and Data Over Time
Tab M CSV Transmittal Letter
Tab N Exceedance Notices for the Reporting Period
Tab A
Site Plan and Perched Well Locations White Mesa Site
Tab B
Order of Sampling and Field Data Worksheets
Groundwater Discharge Permit
·~---e~ . _.· i .-,·
.,. ,/
--: ,·. l ? 'EJIV".ESRGY-FUELS
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID MW-04 Sampling Program Chloroform Monitoring
Field Sample ID MW-04 08202024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 8/20/2024 10:35
Sample Date & Time 8/20/2024 10:35 I sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 27
Purging Method 2 Casings Previous Well Sampled TW4-02
Casing Volume (gal) 14.73
Calculated Casing Volumes Purge Duration ()
pH Buffer 7 .0 7.0 Well Depth (ft) 123.60
pH Buffer 4.0 4.0 Well Casing Diameter (in) 3
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 83.45
Conductivity Dissolved
Date/Time Gallons Purged (umhos/cm) pH (pH Units) Temp (deg C) Redox(mV) Turbidity (NTU) Oxygen(%) Before/After
8/20/2024 10:35 1892 7.38 16.16 331 0 36.4
Pumping Rate Calculations
!volume of water purged () Flow Rate (Q = S/60) (gal/min) 4.0
Time to evacuate 2 Casing Volumes ()
!Final Depth to Water (feet) 84.67 Number of casing Volumes
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Analytica l 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-ml HOPE u H2S04 (pH<2), 4 Deg C y
Comments:
[ Arrived on site at 1030. Samples collected at 1035. Water was clear. Left site at 1037.
Signature of Field Technician
~w ,,,,,_,__ .,)-/.¾f~
Groundwater Discharge Permit
.,,,.,-----
\, ... s .· .-·t£· .. r"_.: /,_ -
,/. -i E-"'FERG"Y~
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-01 Sampling Program Chloroform Monitoring
Field Sample ID TW4-01 08202024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 8/20/2024 10:42
Sample Date & Time 8/20/2024 10:42 [sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 28
Purging Method 2 Casings Previous Well Sampled MW-04
Casing Volume (gal) 6.00
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7.0 Well Depth (ft) 111.30
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 102.11
Conductivity Dissolved
Date/Time Gallons Purged (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
8/20/2024 10:42 2163 7.42 17.28 303 0 90.0
Pumping Rate Calculations
[volume of water purged O Flow Rate (Q = S/60) (gal/min) 12.5
Time to evacuate 2 Casing Volumes O
[ Final Depth to Water (feet) 109.45 Number of casing Volumes
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Anal}'_tical 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 HOPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Arrived on site at 1038. Samples collected at 1042. Left site at 1044. Water was clear.
Signature of Field Technician
.--"\
...___j ,,,,, .. _,_ -/:/ .. //~4)
Groundwater Discharge Permit
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-03 Sampling Program Sampling Program Chloroform Monitoring Chloroform Monitoring
Field Sample ID TW4-03 _09122024 Sampling Event Sampling Event 2024 Q3 Chloroform 2024 Q3 Chloroform
Purge Date & Time 9/11/2024 8:37
Sample Date & Time 9/12/2024 7:21 !sampler [sampler I TH/DL TH/DL
Purging Equipment Pump Weather Conditions Partly cloudy
Pump Type Grundfos External Ambient Temperature (C) 20
Purging Method 2 Casings Previous Well Sampled TW4-60
Casing Volume (gal) 48.32
Calculated Casing Volumes Purge Duration (min) 8.78
pH Buffer 7 .0 7.0 Well Depth (ft) 140.30
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 66.30
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/11/2024 8:47 68.75 1830 6.86 15.00 401 2.1 75.0
9/12/2024 7:21 1774 6.74 15.39 Before
9/12/2024 7:22 1771 6.77 15.35 After
Pumping Rate Calculations
[volume of water purged (g_a~s} 68.75 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 6.25
[Final Depth to Water (feet) 137.65 Number of casing Volumes 1.42
Volume, if well evacuated to dryness (gals) 68.75
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 HOPE u H2S04 (pH<2), 4 Deg C y
Comments:
Arrived on site at 0836. Purge began at 0841. Purged well for a total of 6 minutes and 15 seconds. Purged well dry. Purge ended at 0847. Water was clear. Left site at 0849.
Arrived on site at 0717. Depth to water was 66.54. Samples bailed and collected at 0721. Left site at 0723.
Signature of Field Technician
~"' ""L-L---1--/--«~
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Groundwater Discharge Permit
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID lW4·04 Sampling Program Chloroform Monitoring
Field Sample ID lW4·04_08202024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 8/20/2024 12:03
Sample Date & Time 8/20/2024 12:03 [sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 29
Purging Method 2 Casings Previous Well Sampled lW4·41
Casing Volume (gal) 18.81
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7.0 Well Depth (ft) 114.50
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 85.68
Conductivity Dissolved
Date/Time Gallons Purged (um hos/cm) pH (pH Units) Temp (deg C) Redox(mV) Turbidity (NTU) Oxygen(%) Before/After
8/20/2024 12:03 2309 7.55 17.24 286 0 104.0
Pump_ing 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) 110.30 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?
VOCs·Chloroform y WATER 3 40mlVOA u HCI (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 1159. Samples collected at 1203. Water was clear. Left site at 1205.
Signature of Field Technician
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Groundwater Discharge Permit
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-06 Sampling Program Sampling Program Chloroform Monitoring Chloroform Monitoring
Field Sample ID TW4-06 _09172024 Sampling Event Sampling Event 2024 Q3 Chloroform 2024 Q3 Chloroform
Purge Date & Time 9/16/2024 12:30
Sample Date & Time 9/17/2024 8:21 !sampler lsamJ!ler I TH/DL TH/DL
Purging Equipment Pump Weather Conditions Cloudy and windy
Pump Type Grundfos External Ambient Temperature (C) 23
Purging Method 2 Casings Previous Well Sampled TW4-34
Casing Volume (gal) 12.11
Calculated Casing Volumes Purge Duration (min) 2.20
pH Buffer 7.0 7.0 Well Depth (ft) 99.60
pH Buffer 4.0 4.0 Well Casing Diameter (in) ' 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 81.04
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/16/2024 12:31 13.75 3751 6.71 15.95 322 36.0 5.2
9/17/2024 8:21 3740 6.98 15.08 Before
9/17/2024 8:22 3743 6.97 15.05 After
Pumping Rate Calculations
[volume of water purged (gals) 13.75 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 1.25
[Final Depth to Water (feet) 96.99 Number of casing Volumes 1.13
Volume, if well evacuated to dryness (gals) 13.75
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-ml HOPE u H2SO4 (pH<2), 4 Deg C y
Comments :
Arrived on site at 1226. Purge began at 1230. Purged well for a total of 1 minute and 15 seconds. Purged well dry. Purge ended at 1231. Water was clear. Left site at 1234.
Arrived on site at 0817 . Depth to water was 81.33. Samples bailed and collected at 0821. Left site at 0822.
Signature of Field Technician
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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)
9/17/202414:33 55.00
9/18/2024 9:25
9/18/2024 9:26
[volume of water purged (gals)
[Final Depth to Water (feet)
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Type of Sample/Analysis
voes-Chloroform
Chloride
Nitrate/nitrite as N
Comments:
Groundwater Discharge Permit
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
TW4-07 Sampling Program Chloroform Monitoring
TW4-07 _09182024 Sampling Event 2024 Q3 Chloroform
9/17/202414:28
9/18/2024 9:25 !sampler I TH/DL
Pump Weather Conditions Cloudy and windy
Grundfos External Ambient Temperature (C) 23
2 Casings Previous Well Sampled TW4-26
25.10
4.56
7.0 Well Depth (ft) 121.00
4.0 Well Casing Diameter (in) 4
1000 Depth to Water Before Purging (ft) 82.56
Conductivity Dissolved
(um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
1701 7.22 15.22 277 15.5 33.1
1731 7.30 14.26 Before
1734 7.27 14.30 After
Pumping Rate Calculations
55.00 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 5.00
16.77 Number of casing Volumes 2.00
Volume, if well evacuated to dryness (gals) 55.00
Sample Container Preservative
Collected? Matrix Number Type Sample Filtered? Type Added?
y WATER 3 40mlVOA u HCl (pH<2), 4 Deg C y
y WATER 1 500-ml Poly u None N
y WATER 1 250-mLHDPE u H2SO4 (pH<2), 4 Deg C y
Arrived on site at 1424. Purge began at 1428. Purged well for a total of 5 minutes. Purged well dry. Purge ended at 1433. Water was a little murky. Left site at 1436.
Arrived on site at 0922 . Depth to water was 85.88. Samples bailed and collected at 0925 . Left site at 0927 .
Signature of Field Technician
-=='.L,'-'1h<--! ,.,,_-(%~
I
Groundwater Discharge Permit
~ ~e· -_.--t,F-,,-1 --,• r ~-,.~;.. -
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-09 Sampling Program Chloroform Monitoring
Field Sample ID TW4-09 _09172024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/16/2024 13:56
Sample Date & Time 9/17/2024 8:50 !sampler I TH/DL
Purging Equipment Pump Weather Conditions Cloudy and windy
Pump Type Grundfos External Ambient Temperature (C) 23
Purging Method 2 Casings Previous Well Sampled TW4-27
Casing Volume (gal) 31.50
Calculated Casing Volumes Purge Duration (min) 5.72
pH Buffer 7.0 7.0 Well Depth (ft) 120.10
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 71.85
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/16/2024 14:01 55.00 2375 6.64 15.28 360 23.8 1.0
9/16/2024 14:02 66.00 2373 6.70 15.26 358 25.0 1.0
9/16/2024 14:03 77.00 2370 6.75 15 .24 356 24.0 0.9
9/16/2024 14:04 88.00 2369 6.75 15.23 355 24.5 0.9
Pumping Rate Calculations
~olume of water purged (gals) 88.00 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 8.00
[ Final Depth to Water (feet) 72.39 Number of casing Volumes 2.00
Volume, if well evacuated to dryness O 0
Name of Certified Analytical Laboratory
AWSL
Anal}'t_ical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
VOCs-Chloroform y WATER 3 40mlVOA u HCI (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 1352. Purge began at 1356. Purged well for a total of 8 minutes . Purge ended at 1404. Water was a little murky . Left site at 1407.
Arrived on site at 0847 . Depth to water was 71.83 . Samples bailed and collected at 0850 . Left site at 0851 .
Signature of Field Technician
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Groundwater Discharge Permit -F.:,. r-• -, :_ .
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID 1W4-12R Sampling Program Chloroform Monitoring
Field Sample ID 1W4-12R 09112024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time
Sample Date & Time 9/11/2024 9:33 [sam pler 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) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/11/2024 9:33 150 10.7 8.40 22.90 217 0.0 19.9
Pu mp in g 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 ()
Name of Certified Analytical Laboratory
AWSL
An alyti cal 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 HOPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Spc 10.7, ph 8.40, temp 22.90, turb 0, orp 217, ldo 19.9
Signature of Field Technician
~ .. -1-/-::-':c4:,
Groundwater Discharge Permit
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-13 Sampling Program Chloroform Monitoring
Field Sample ID TW4-13 09122024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/11/2024 12:50
Sample Date & Time 9/12/2024 8:04 !sampler I TH/DL
Purging Equipment Pump Weather Conditions Partly cloudy
Pump Type Grundfos External Ambient Temperature (C) 27
Purging Method 2 Casings Previous Well Sampled TW4-32
Casing Volume (gal) 30.97
Calculated Casing Volumes Purge Duration (min) 5.63
pH Buffer 7.0 7.0 Well Depth (ft) 105.70
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 58.26
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/11/2024 12:53 41.25 2040 7.00 15.74 482 6.1 84.5
9/12/2024 8:04 2026 7.44 14.58
9/12/2024 8:05 2034 7.43 14.57
Pumping Rate Calculations
!volume of water !)urged (gals) 41.25 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 3.75
!Final Depth to Water (feet) 103.14 Number of casing Volumes 1.33
Volume, if well evacuated to dryness (gals) 41.25
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-mLHDPE u H2SO4 (pH<2), 4 Deg C y
Comments :
Arrived on site at 1245. Purge began at 1250. Purged well for a total of 3 minutes and 45 seconds . Purged well dry. Purge ended at 1253. Water was mostly clear . Left site at 1257 .
Arrived on site at 0800. Depth to water was 58.16 . Samples bailed and collected at 0804 . Left site at 0806 .
Signature of Field Technician
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Before
After
I
Groundwater Discharge Permit
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-14 Sampling Program Chloroform Monitoring
Field Sample ID TW4-14_09122024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/11/2024 13:56
Sample Date & Time 9/12/2024 8:20 !sampler I TH/DL
Purging Equipment Pump Weather Conditions Partly cloudy
Pump Type Grundfos External Ambient Temperature (C) 29
Purging Method 2 Casings Previous Well Sampled TW4-36
Casing Volume (gal) 11.59
Calculated Casing Volumes Purge Duration (min) 2.10
pH Buffer 7.0 7.0 Well Depth (ft) 95.10
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 77.34
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/11/2024 13:57 13.75 5161 6.25 15.98 388 13.2 89.0
9/12/2024 8:20 5078 7 .02 14.77
9/12/2024 8:21 5080 7.00 14.75
Pumping Rate Calculations
!volume of water purged (gals) 13.75 Flow Rate (Q = S/60) (gal/min)
Time to evacuate 2 Casing Volumes (min) I Final Depth to Water (feet) 92.88 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
VO Cs-Chloroform y WATER 3 40mlVOA u HCl (pH<2), 4 Deg C
Chloride y WATER 1 500-mL Poly u None
Nitrate/nitrite as N y WATER 1 250-mLHDPE u H2SO4 (pH<2), 4 Deg C
Comments:
Arrived on site at 1352. Purge began at 1356. Purged well for a total of 1 minute and 15 seconds. Purged well dry. Purge ended at 1357. Water was clear. Left site at 1400.
Arrived on site at 0816. Depth to water was 77.43. Samples bailed and collected at 0820 . Left site at 0822.
Signature of Field Technician
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Before
After
11.00
1.25
1.18
13.75
Added?
y
N
y
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Groundwater Discharge Permit
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID MW-26 Sampling Program Chloroform Monitoring
Field Sample ID MW-26_08202024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 8/20/2024 10:06
Sample Date & Time 8/20/2024 10:10 [sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 26
Purging Method 2Casings Previous Well Sampled TW4-39
Casing Volume (gal) 26.12
Calculated Casing Volumes Purge Duration ()
pH Buffer 7 .0 7.0 Well Depth (ft) 121.33
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 81.33
Conductivity Dissolved
Date/Time Gallons Purged (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
8/20/2024 10:10 3451 7.11 17.04 331 0 34.7
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) 110.46 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-ml HOPE u H2S04 (pH<2), 4 Deg C y
Comments:
[ Arrived on site at 1005. Samples collected at 1010. Water was clear. Left site at 1012
Signature of Field Technician
~J, :.n.•A-cf-/ -«4)
Groundwater Discharge Permit
i:-~~~
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-16 Sampling Program Chloroform Monitoring
Field Sample ID TW4-16 09182024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/17/2024 12:23
Sample Date & Time 9/18/2024 8:51 Sampler TH/DL
Purging Equipment Pump Weather Conditions Cloudy and windy
Pump Type Grundfos External Ambient Temperature (C) 22
Purging Method 2 Casings Previous Well Sampled TW4-18
Casing Volume (gal) 47.59
Calculated Casing Volumes Purge Duration (min) 8.65
pH Buffer 7.0 7.0 Well Depth (ft) 147.60
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 74.72
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/17/2024 12:30 77.00 3598 6.61 15.14 441 29.0 3.5
9/17/202412:31 88.00 3559 6.67 15.06 438 28.2 3.1
9/17/2024 12:32 99.00 3471 6.75 15.05 435 27.0 3.0
9/17/202412:33 110.00 3463 6.79 15.04 431 26.4 2.9
Pumping Rate Calculations
!volume of water purged (gals) 110.00 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 10.00 I Final Del)th to Water (feet) 103.89 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?
VOCs-Chloroform y WATER 3 40mlVOA u HCI (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 HOPE u H2SO4 (pH<2), 4 Deg C y
Comments:
Arrived on site at 1219. Purge began at 1223. Purged well for a total of 1 0 minutes. Purge ended at 1233. Water was a little murky. Left site at 1236.
Arrived on site at 0847 . Depth to water was 74.92. Samples bailed and collected at 0851. Left site at 0852.
Signature of Field Technician
~ ,,c,:,•-c~·/-;/-~~~)
~~~~ ~-~c=-.-~y~
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)
9/16/202411:27 64.44
9/16/2024 11:28 64.66
9/16/202411:29 64.88
9/16/2024 11:30 65.10
I volume of water purged (gals)
[ Final Depth to Water (feet)
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Type of Sample/Analysis
voes-Chloroform
Chloride
Nitrate/nitrite as N
Comments:
Groundwater Discharge Permit
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
MW-32 Sampling Program
MW-32 09162024 Sampling Event
9/16/2024 6:30
9/16/2024 11:30 [sam pler
Pump Weather Conditions
QED External Ambient Temperature (C)
2 Casings Previous Well Sampled
30.49
281.06
7.0 Well Depth (ft)
4.0 Well Casing Diameter (in)
1000 Depth to Water Before Purging (ft)
Conductivity
(umhoslcm) pH (pH Units) Temp (deg C) Redox (mV)
3446 6.60 16.01 207
3440 6.61 15.95 202
3471 6.63 15.93 194
3478 6.64 15.90 191
Pu mp ing Rate Calculations
65.10 Flow Rate (Q = S/60) (gal/min)
Time to evacuate 2 Casing Volumes (min)
87.21 Number of casing Volumes
Volume, if well evacuated to dryness ()
Sample Container
Collected? Matrix Number Type Sample Filtered?
y WATER 3 40mlVOA u
y WATER 1 500-ml Poly u
y WATER 1 250-ml HDPE u
Chloroform Monitorin~
2024 Q3 Chloroform
TH/DL
Cloudy
14
MW-31
130.60
4
83.90
Dissolved
Turbidity (NTU) Oxygen(%) BeforelAfter
5.3 10.8
5.7 10.0
6.0 9.8
6.2 9.7
.217
300.00
2.00
0
Preservative
Type Added?
HCl (pH<2), 4 Deg C y
None N
H2SO4 (pH<2), 4 Deg C y
j Arrived on site at 0625. Purge began at 0630. Purged well for a totaL of 300 miQutes~ Pu~g_ed ended and samples collected at 1130. Water was murky. Left site at 1135.
Signature of Field Technician
----... ' /2 '. / ...__J" _ ''"''-'-------1-;/, -:.-z;,:::; <7
Groundwater Discharge Permit
~ . e~ • . • . . -I ,· •
-..,. _,r
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID 1W4-18 Sampling Program Chloroform Monitoring
Field Sample ID 1W4-18_09182024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/17/202411:48
Sample Date & Time 9/18/2024 8:38 Sampler TH/DL
Purging Equipment Pump Weather Conditions Cloudy and windy
Pump Type Grundfos External Ambient Temperature (C) 22
Purging Method 2 Casings Previous Well Sampled 1W4-33
Casing Volume (gal) 40.45
Calculated Casing Volumes Purge Duration (min) 7.35
pH Buffer 7.0 7.0 Well Depth (ft) 136.90
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 74.94
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/17/202411:54 66.00 2000 6.53 15.63 445 14.0 9.6
9/17/202411:55 77.00 1985 6.55 15.67 444 13.0 9.4
9/17/202411:56 88.00 1968 6.58 15.63 443 12.6 9.4
9/17/202411:57 99.00 1948 6.60 15.62 443 13.0 9.5
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
[ Final Depth to Water (feet) 76.12 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?
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 1144. Purge began at 1148. Purged well for a total of 9 minutes. Purge ended at 1157. Water was a little murky. Purge ended at 1157. Left site at 1200.
Arrived on site at 0834. Depth to water was 75.05. Samples bailed and collected at 0838. Left site at 0837.
Signature of Field Technician
~~~ ~~-f-/4~
Groundwater Discharge Permit
~
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-23 Sampling Program Chloroform Monitoring
Field Sample ID TW4-23 _09172024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/16/2024 9:52
Sample Date & Time 9/17/2024 7:52 !sampler TH/DL
Purging Equipment Pump Weather Conditions Partly cloudy and windy
Pump Type Grundfos External Ambient Temperature (C) 20
Purging Method 2 Casings Previous Well Sampled TW4-43
Casing Volume (gal) 25.25
Calculated Casing Volumes Purge Duration (min) 4.59
pH Buffer 7.0 7.0 Well Depth (ft) 116.40
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 77.72
Conductivity Dissolved
Date/Time Gallons Purged (gal) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/16/2024 9:56 44.00 3305 6.78 14.59 240 2.2 9.4
9/16/2024 9:57 55.00 3310 6.78 14.70 225 2.7 9.8
9/16/2024 9:58 66.00 3316 6.79 14.66 218 2.8 9.9
9/16/2024 9:59 77.00 3326 6.81 14.66 210 3.0 10.0
!volume of water _pur_g_ed (gals)
P um ping_ Rate Calculations
77.00 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 7.00
!Final Depth to Water (feet) 98.48 Number of casing Volumes 2.00
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Ana lyti cal 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/nit rite as N y WATER 1 250-ml HOPE u H2S04 (pH<2), 4 Deg C y
Comments :
Arrived on site at 0949. Purge began at 0952 . Purged well for a total of 7 minutes. Water had an orange coloration. Purge ended at 0959. Left site at 1002.
Arrived on site at 0748. Depth to water was 77.68. Samples bailed and collected at 0752. Left site at 0753.
Signature of Field Technician
----., • / /✓ C: /
---.__J J ~ --:..Jl--£_,L,_,-r;r:_ '1_,L ~<)
Groundwater Discharge Permit
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID 1W4-24 Sampling Program Chloroform Monitoring
Field Sample ID 1W4-24_08202024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 8/20/2024 9:36
Sample Date & Time 8/20/2024 9:40 [sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 25
Purging Method 2 Casings Previous Well Sampled 1W4-25
Casing Volume (gal) 26.17
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) 74.71
Conductivity Dissolved
Date/Time Gallpns Purged (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
8/20/2024 9:40 6471 7.04 16.41 401 0 28.7
Pum pi ng 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) 79.48 Number of casing Volumes
Volume, if well evacuated to dryness () 0
Name of Certified Analyti_cal Laboratory
AWSL
Analytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Typ e Sample Filtered? Type Added?
VOCs-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 HDPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Arrived on site at 0935. Samples collected at 0940. Water was clear. Left site at 0942 .
Signature of Field Technician
~u, ,,,, • ...-, __ -//-(~>~)
Groundwater Discharge Permit
•;·_/~~ ., ~-=:::.-~y~ Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-26 Sampling Program Chloroform Monitoring
Field Sample ID TW4-26 09182024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/17/202414:02
Sample Date & Time 9/18/2024 9: 17 !sampler I TH/DL
Purging Equipment Pump Weather Conditions Cloudy and windy
Pump Type Grundfos External Ambient Temperature (C) 23
Purging Method 2 Casings Previous Well Sampled TW4-29
Casing Volume (gal) 7.67
Calculated Casing Volumes Purge Duration (min) 1.39
pH Buffer 7.0 7.0 Well Depth (ft) 87.70
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 75.94
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/17/202414:02 8.25 4588 6.55 16.60 465 4.4 61.7
9/18/2024 9: 17 4770 7.16 14.70 Before
9/18/2024 9:18 4776 7.12 14.71 After
Pumping Rate Calculations I Volume of water purged (gals) 8.25 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 0.75
[ Final Depth to Water (feet) 85.43 Number of casing Volumes 1.07
Volume, if well evacuated to dryness (gals) 8.25
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-ml HDPE u H2SO4 (pH<2), 4 Deg C y
Comments:
Arrived on site at 1358. Purge began at 1402. Purged well for a total of 45 seconds. Purged well dry. Water was clear. Purge ended at 1402. Left site at 1405.
Arrived on site at 0913. Depth to water was 76.31. Samples bailed and collected at 0917. Left site at 0919.
Signature of Field Technician
~c,, uivL-f-/. .(t~
I
Groundwater Discharge Permit
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-27 Sampling Program Chloroform Monitoring
Field Sample ID TW4-27_09172024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/16/2024 13:28
Sample Date & Time 9/17/2024 8:40 !sampler I TH/DL
Purging Equipment Pump Weather Conditions Cloudy and windy
Pump Type Grundfos External Ambient Temperature (C) 23
Purging Method 2 Casings Previous Well Sampled TW4-35
Casing Volume (gal) 10.65
Calculated Casing Volumes Purge Duration (min) 1.93
pH Buffer 7.0 7.0 Well Depth (ft) 95.75
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 79.43
Conductivity Dissolved
Date/Time Gallons Purged (gal) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/16/2024 13:29 11.0 4987 6.43 16.40 357 15.7 41.0
9/17/2024 8:40 4874 6.52 15.24 Before
9/17/2024 8:41 4878 6.51 15.30 After
!volume of water purged (gals)
Pumping Rate Calculations
11.00
-
Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 1.00
!Final Depth to Water (feet) 92.94 Number of casing Volumes 1.03
Volume, if well evacuated to dryness (gals) 11.00
Name of Certified Analytical Laboratory
AWSL
Analytical_§_amples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type Added?
VOCs-Chloroform y WATER 3 40mlVOA u HCI (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 HOPE u H2S04 (pH<2), 4 Deg C y
Comments:
Arrived on site at 1324. Purge began at 1328. Purged well for a total of 1 minute. Purged well dry. Purge ended at 1329. Water was clear. Left site at 1332 .
Arrived on site at 0836 . Depth to water was 79.82. Samples bailed and collected at 0840. Left site at 0842.
Signature of Field Technician
~LU v,,,_c__..-r/. -/4'~
I
~-~
~-.:-..-E#VERGY~
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)
Groundwater Discharge Permit
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
TW4-29 Sampling Program
TW4-29 _09182024 Sampling Event
9/17/202413:33
9/18/2024 9:08 !sampler I
Pump Weather Conditions
Grundfos External Ambient Temperature (C)
2 Casings Previous Well Sampled
9.45
1.71
7.0 Well Depth (ft)
4.0 Well Casing Diameter (in)
1000 Depth to Water Before Purging (ft)
Conductivity
Chloroform Monitoring
2024 Q3 Chloroform
TH/DL
Cloudy and windy
23
TW4-10
94.48
4
80.00
Dissolved
Date/Time Gallons Purged (gal) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/17/2024 13:34 8.25 3932 6.68 16.43 428 5.8 86.3
9/18/2024 9:08 3864 7.25 14.64
9/18/2024 9:09 3873 7.23 14.61
Pumping Rate Calculations
jvolume of Wil_te~ p_urg~ (gals) 8.25 Flow Rate (Q = S/60) (gal/min)
Time to evacuate 2 Casing Volumes (min) I Final Depth to Water (feet) 92.20 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
voes-Chloroform y WATER 3 40mlVOA u HCl (pH<2), 4 Deg C
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 1329. Purge began at 1333. Purged well for a total of 45 seconds. Purged well dry. Water was clear. Purge ended at 1333. Left site at 1337 .
Arrived on site at 0904 . Depth to water was 80.15. Samples bailed and collected at 0908. Left site at 0910.
Signature of Field Technician
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Before
After
11.00
0.75
0.87
8.25
Added?
y
N
y
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Groundwater Discharge Permit
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-30 Sampling Program Chloroform Monitoring
Field Sample ID TW4-30_09182024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/17/202410:21
Sample Date & Time 9/18/2024 8:16 Sampler TH/DL
Purging Equipment Pump Weather Conditions Cloudy and windy
Pump Type Grundfos External Ambient Temperature (C) 19
Purging Method 2 Casings Previous Well Sampled TW4-05
Casing Volume (gal) 11.81
Calculated Casing Volumes Purge Duration (min) 2.14
pH Buffer 7.0 7.0 Well Depth (ft) 93.48
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 75.38
Conductivity Dissolved
Date/Time Gallons Purged (gal) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/17/202410:22 13.75 ·4473 6.08 15.85 462 15.0 28.0
9/18/2024 8:16 4420 6.06 15.40
9/18/2024 8:17 4426 6.07 15.36
Pumping Rate Calculations
[volume of water purged (gals) 13.75 Flow Rate (Q = S/60) (gal/min)
Time to evacuate 2 Casing Volumes (min)
[Final Depth to Water (feet) 91.32 Number of casing Volumes
Volume, if well evacuated to dryness (gals)
Name of Certified Analytical Laboratory
AWSL
Analytical Sc1_meles Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type
VOCs-Chloroform y WATER 3 40mlVOA u HCl (pH<2), 4 Deg C
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:
Arri ved on site at 1017. Purge began at 1021. Purged well for a total of 1 minute and 15 seconds. Purged well dry. Water was a little murky. Purge ended at 1022. Left site at 1025.
Arrived on site at 0812. Depth to water was 75.50. Samples bailed and collected at 0816. Left site at 0818.
Signature of Field Technician
2)CL,:JlL,L~+~-~~ '
Before
After
11.00
1.25
1.16
13.75
Added?
y
N
y
Groundwater Discharge Permit
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-30R Sampling Program Chloroform Monitoring
Field Sample ID TW4-30R_09172024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time
Sample Date & Time 9/17/202410:07 [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) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/17/202410:07 150 18.0 6.45 22.00 442 0 .0 15.0
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 ()
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-ml HOPE u H2SO4 (pH<2}, 4 Deg C y
Comments: I Temp 22.00, spc 18 .0, ph 6.45, turb 0, orp 442, Ida 15 .0
Signature of Field Technician
--:3 ,, C,L;!--'<---/ /-«.~
Groundwater Discharge Permit ~-e· ·~1 •• j . '• • . YFLIEZ:.S -__ , ~ ,_ ... , r
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID 1W4-31 Sampling Program Chloroform Monitoring
Field Sample ID 1W4-31 09122024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/11/2024 14:29
Sample Date & Time 9/12/2024 9:00 Sampler TH/DL
Purging Equipment Pump Weather Conditions Partly cloudy
Pump Type Grundfos External Ambient Temperature (C) 29
Purging Method 2 Casings Previous Well Sampled 1W4-14
Casing Volume (gal) 20.45
Calculated Casing Volumes Purge Duration (min) 3.71
pH Buffer 7.0 7.0 Well Depth (ft) 107.48
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 76.15
Conductivity Dissolved
Date/Time Gallons Purged (gal) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/11/202414:31 22.00 3450 7.03 16.07 360 22.0 25.0
9/12/2024 9:00 3581 6.97 15.20
9/12/2024 9:01 3582 7.00 15.15
Pump ing Rate Calculations
jvolume of water purged (gals) 22.00 Flow Rate (Q = S/60) (gal/min)
Time to evacuate 2 Casing Volumes (min)
jFinal Depth to Water (feet) 104.78 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
VOCs-Chloroform y WATER 3 40mlVOA u HCl (pH<2), 4 Deg C
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 1424. Purge began at 1429. Purged well for a total of 2 minutes. Purged well dry. Water was a little murky. Purge ended at 1431. Left site at 1434.
Arrived on site at 0856. Depth to water was 76.14. Sameles bailed and collected at 0900. Left site at 0902.
Signature of Field Technician
~~,'-'"'-~rA-/4~
Before
After
11.00
2.00
1.07
22.00
Added?
y
N
y
Groundwater Discharge Permit
~~ ' -~17~y~
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-32 Sampling Program Chloroform Monitoring
Field Sample ID TW4-32_09122024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/11/2024 12:11
Sample Date & Time 9/12/2024 7:57 !sampler I TH/DL
Purging Equipment Pump Weather Conditions Partly cloudy
Pump Type Grundfos External Ambient Temperature (C) 26
Purging Method 2 Casings Previous Well Sampled TW4-28
Casing Volume (gal) 37.16
Calculated Casing Volumes Purge Duration (min) 6.75
pH Buffer 7.0 7.0 Well Depth (ft) 114.64
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 57.73
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/11/202412:15 44.00 5815 4.10 15.46 491 16.0 1.0
9/11/202412:16 55.00 5727 4.11 15.37 490 15.3 1.0
9/11/202412:17 66.00 5751 4.11 15.28 490 15.0 1.0
9/11/2024 12:18 77.00 5788 4.11 15.25 490 14.0 1.0
Pumping Rate Calculations
jvolume of water purged (gals) 77.00 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 7.00
!Final Depth to Water (feet) 84.49 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?
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-ml HOPE u H2S04 (pH<2), 4 Deg C y
Comments:
Arrived on site at 1207. Purge began at 1211. Purged well for a total of 7 minutes. Purge ended at 1218. Water was clear. Pump and hose had white salt like particles on it when pulled. Left site at
1221 . Arrived on site at 0753. Depth to water was 57 .55. Samples bailed and collected at 0757. Left site at 0758.
Signature of Field Technician
~ . -~ --.___)_,_,~--"---)-/--a-:~<)
I
Groundwater Discharge Permit
~.:::--e ~ tF-· --i" ---J._,.~·
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-33 Sampling Program Chloroform Monitoring
Field Sample ID TW4-33 _09182024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/17/202410:51
Sample Date & Time 9/18/2024 8:24 !sampler I TH/DL
Purging Equipment Pump Weather Conditions Cloudy and windy
Pump Type Grundfos External Ambient Temperature (C) 20
Purging Method 2 Casings Previous Well Sampled TW4-30
Casing Volume (gal) 4.12
Calculated Casing Volumes Purge Duration (min) 0.75
pH Buffer 7.0 7.0 Well Depth (ft) 86.23
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 79.91
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/17/202410:51 3.66 14.5 5.39 21.17 496 6.1 60.5
9/18/2024 8:24 4495 6.95 15.02
9/18/2024 8:25 4500 7.00 14.97
Pumpin g Rate Calculations
Jvolume of water purged (gals) 3.66 Flow Rate (Q = S/60) (gal/min)
Time to evacuate 2 Casing Volumes (min)
[Final Depth to Water (feet) 84.17 Number of casing Volumes
Volume, if well evacuated to dryness (gals)
Name of Certified Analytical Laboratory
AWSL
Analrtica l Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type
VOCs-Chloroform y WATER 3 40mlVOA u HCl (pH<2), 4 Deg C
Chloride y WATER 1 500-ml Poly u None
Nitrate/nitrite as N y WATER 1 250-ml HOPE u H2SO4 (pH<2), 4 Deg C
Comments:
Arrived on site at 1047. Purge began at 1051. Purged well for a total of 20 seconds. Purged well dry. Purged ended at 1051. Left site at 1054.
Arrived on site at 0820. Depth to water was 80.96. Samples bailed and collected at 0824.
Signature of Field Technician
~.~, :,u,~-,__-J-/"'--a~
Before
After
11.00
0.33
0.88
3.66
Added?
y
N
y
I
Groundwater Discharge Permit
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Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-34 Sampling Program Chloroform Monitoring
Field Sample ID TW4-34_09172024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/16/2024 12:01
Sample Date & Time 9/17/2024 8:11 Sampler TH/DL
Purging Equipment Pump Weather Conditions Cloudy and windy
Pump Type Grundfos External Ambient Temperature (C) 23
Purging Method 2 Casings Previous Well Sampled TW4-38
Casing Volume (gal) 11.30
Calculated Casing Volumes Purge Duration (min) 2.05
pH Buffer 7.0 7.0 Well Depth (ft) 95.74
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 78.43
Conductivity Dissolved
Date/Time Gallons Purged (gal) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/16/2024 12:02 13.75 3650 7.10 16.40 223 7.8 34.0
9/17/2024 8:11 3511 6.99 15.29 Before
9/17/2024 8:12 3520 7.04 15.26 After
Pumping Rate Calculations
!volume of water purged (gals) 13.75 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 1.25
!Final Depth to Water (feet) 93.46 Number of casing Volumes 1.21
Volume, if well evacuated to dryness (gals) 13.75
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 1157. Purge began at 1201. Purged well for a total of 1 minutes and 15 seconds. Purged well dry. Water was clear. Purge ended at 1202. Left site at 1205.
Arrived on site at 0807 . Depth to water was 78.37. Samples bailed and collected at 0811. Left site at 0813.
Signature of Field Technician
----,_ , ~ //':L -..____)u,,. ":../"...;~ -~~ •.--,>,__._ ~ <)
Groundwater Discharge Permit
--...-><::::;~~·, r .. _ 1,--.. ~y~ ~ ---( . ,. .•
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-35 Sampling Program Chloroform Monitoring
Field Sample ID TW4-35 _09172024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/16/2024 13:00
Sample Date & Time 9/17/2024 8:30 !sampler I TH/DL
Purging Equipment Pump Weather Conditions Cloudy and windy
Pump Type Grundfos External Ambient Temperature (C) 23
Purging Method 2 Casings Previous Well Sampled TW4-06
Casing Volume (gal) 6.79
Calculated Casing Volumes Purge Duration (min) 1.23
pH Buffer 7.0 7.0 Well Depth (ft) 86.50
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 76.10
Conductivity Dissolved
Date/Time Gallons Purged (gal) (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/16/2024 13:00 7.33 4278 6.65 16.81 346 16.5 28.3
9/17/2024 8:30 4206 6.80 15.15
9/17/2024 8:31 4204 6.79 15.10
Pumping Rate Calculations
!volume of water purged (gals) 7.33 Flow Rate (Q = S/60) (gal/min)
Time to evacuate 2 Casing Volumes (min)
[ Final Depth to Water (feet) 84.12 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
voes-Chloroform y WATER 3 40mlVOA u HCl (pH<2), 4 Deg C
Chloride y WATER 1 500-ml Poly u None
Nitrate/nitrite as N y WATER 1 250-mLHDPE u H2SO4 (pH<2), 4 Deg C
Comments:
Arrived on site at 1256. Purge began at 1300. Purged well for a total of 40 seconds. Purged well dry. Water was a little murky. Purge ended at 1300. Left site at 1304.
Arrived on site at 0826. Depth to water was 76.05. Samples bailed at 0830. Left site at 0832.
Signature of Field Technician
~ , , ONA----!--/\4~
Before
After
11.00
0.66
1.07
7.33
Added?
y
N
y
I
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'• e -'£t ---:_-. .,<·-'
E~Y~
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)
Sheet 41 of 49
White Mesa Mill
Groundwater Discharge Permit
Groundwater Monitoring Quality Assurance Plan
Field Data Worksheet For Groundwater
TW4-36 Sampling Program rogram
TW4-36~09122024 Sampling Event Sampling Event
9/11/202413:24
9/12/2024 8:11 !sampler [sampler I
Pump Weather Conditions
Grundfos External Ambient Temperature (C)
2 Casings Previous Well Sampled
26.17
4.75
7.0 Well Depth (ft)
4.0 Well Casing Diameter (in)
1000 Depth to Water Before Purging (ft)
Conductivity
Chloroform Monitoring Chloroform Monitoring
2024 Q3 Chloroform 2024 Q3 Chloroform
TH/DL TH/DL
Partly cloudy
28
TW4-13
99.41
4
59.33
Dissolved
Date/Time Gallons Purged (gal) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/11/202413:27 33.00 2502 6.75 15.81 230 24.1 1.4
9/12/2024 8:11 2348 7.37 14.67
9/12/2024 8:12 2358 7.35 14.67
Pumping Rate Calculations
!volume of water purged (gals) 33.00 Flow Rate (Q = S/60) (gal/min)
Time to evacuate 2 Casing Volumes (min)
[Finll! Depth to Water (feet) 97.05 Number of casing Volumes
Volume, if well evacuated to dryness (gals)
Name of Certified Analytical Laboratory
AWSL
Ana lytical Samples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Type
VOCs-Chloroform y WATER 3 40mlVOA u HCl (pH<2), 4 Deg C
Chloride y WATER 1 500-mL Poly u None
Nitrate/nitrite as N y WATER 1 250-mLHDPE u H2SO4 (pH<2), 4 Deg C
Comments :
Arrived on site at 1320. Purge began at 1324. Purged well for a total of 3 minutes. Purged well dry. Purge ended at 1327. Water was a little murky. Left site at 1329.
Arrived on site at 0808. Depth to water was 60.25. Samples bailed and collected at 0811. Left site at 0813.
Signature of Field Technician
~,, CM-<--1-/--/4~
Before
After
11.00
3.00
1.26
33.00
Added?
y
N
y
I
Groundwater Discharge Permit ~~e--~ PF---,. ~ --=_~-/~-----__ " ~y~ • __.it •• ~·
I .
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-37 Sampling Program Chloroform Monitoring
Field Sample ID TW4-37_08202024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 8/20/2024 9:54
Sample Date & Time 8/20/2024 9:54 !sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 26
Purging Method 2 Casings Previous Well Sampled TW4-22
Casing Volume (gal) 25.31
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7.0 Well Depth (ft) 113.72
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 74.95
Conductivity Dissolved
Date/Time Gallons Purged (umhos/cm) pH (pH Units) Temp (deg C) Redox(mV) Turbidity (NTU) Oxygen(%) Before/After
8/20/2024 9:54 4764 6.62 16.80 388 0 53 .0
Pumping Rate Calculations
[volume of water purged () Flow Rate (Q = S/60) (gal/min) 17.50
Time to evacuate 2 Casing Volumes ()
[Final Depth to Water (feet) 80 .33 Number of casing Volumes
Volume, if well evacuated to dryness () 0
Name of Certified Analytical Laboratory
AWSL
Anal)'!_ical 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: I Arrived on site at 0951 . Samp les collected at 0954 . Water was clear. Left site at 0957.
Signature of Field Technician
~ , ' /;,~ _/
---___) :,,1., :.....rt.;~..,.,~--,~/~_.-::,..r .... -~;j
~~e-·-·'£, -.· ?' ·---~--/~. . FlJEZ.-5
---I , £"'1ERGY
.,/ -
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 P urged (gal)
9/16/202410:30
9/16/2024 10:31
9/16/2024 10:32
9/16/2024 10:33
!volume of water purged (gals)
[ Final Depth to Water (feet)
44.00
55.00
66.00
77.00
Name of Certified Analytical Laboratory
AWSL
Ana lytica l Samples Information
Type of Sample/Analysis
voes-Chloroform
Chloride
Nitrate/nitrite as N
Comments :
Groundwater Discharge Permit
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
1W4-38 Sampling Program rogram Chloroform Monitoring Chloroform Monitoring
1W4-38_09172024 Sampling Event Sampling Event 2024 Q3 Chloroform 2024 Q3 Chloroform
9/16/202410:26
9/17/2024 8:02 !sampler [sampler I TH/DL TH/DL
Pump Weather Conditions Partly cloudy and windy
Grundfos External Ambient Temperature (C) 21
2 Casings Previous Well Sampled 1W4-23
34.01
6.18
7.0 Well Depth (ft) 113.92
4.0 Well Casing Diameter (in) 4
1000 Depth to Water Before Purging (ft) 61.83
Conductivity Dissolved
(umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
1761 6.70 15.15 372 6.1 78.1
1780 6.75 15.01 371 6.1 71.0
1860 6.80 14.95 370 6.2 68.0
1797 6.84 14.92 368 6.3 67.0
Pumping Rate Calculations
77.00 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casin g Volumes (min ) 7.00
103.49 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 3 40mlVOA u HCl (pH<2), 4 Deg C y
y WATER 1 500-mL Poly u None N
y WATER 1 250-mL HDPE u H2SO4 (pH<2), 4 Deg C y
Arrived on site at 1022. Purge began at 1026. Purged well for a total of 7 minutes. Purge ended at 1033. Water was clear. Left site at 1036.
Arrived on site at 0758 . Depth to water was 61.81. Sa mples bailed and collected at 0802. Left site at 0803.
Signature of Field Technician
~u , ""<'-c.--f-,"; -/4;0}
I
Groundwater Discharge Permit -'£,
~~---..<---_ ~YFUEZ.S -•. ,• _,· ..
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-39 Sampling Program Chloroform Monitoring
Field Sample ID TW4-39 08202024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 8/20/2024 10:03
Sample Date & Time 8/20/2024 10:03 !sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 26
Purging Method 2 Casings Previous Well Sampled TW4-37
Casing Volume (gal) 30.45
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7.0 Well Depth (ft) 120.74
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 74.10
Conductivity Dissolved
Date/Time Gallons Purged (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
8/20/2024 10:03 2368 7.14 16.47 375 9.0 97 .0
!volume of water purged ()
Pumping_ Rate Calculations
Flow Rate (Q = S/60) (gal/min) 18.00
Time to evacuate 2 Casing Volumes () I Final Depth to Water (feet) 107.64 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?
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-mLHDPE u H2SO4 (pH<2), 4 Deg C y
Comments: I Arrived on site at 0957. Samples collected at 1003. Water was clear. Left site at 1005
Signature of Field Technician
----. , -/4 -;; / ---._____) " , ,,,_,,_<----,--/, -.:..L: .:<....c,
~
. ~~~~ -=::.-~y~
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 ()
pH Buffer 7.0
pH Buffer 4.0
Specific Conductance (micromhos)
Date/Time Gallons Purged
8/20/2024 12:12
[volume of water purged ()
[ Final Depth to Water (feet)
Name of Certified Analytical Laboratory
AWSL
Analytical Samples Information
Type of Sample/Analysis
VOCs-Chloroform
Chloride
Nitrate/nitrite as N
Comments:
Groundwater Discharge Permit
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
TW4-40 Sampling Program Chloroform Monitoring
TW4-40_08202024 Sampling_ Event 2024 Q3 Chloroform
8/20/202412:12
8/20/202412:12 [sampler TH/DL
Pump Weather Conditions Sunny
Grundfos External Ambient Temperature (C) 29
2 Casings Previous Well Sampled TW4-04
6.03
7.0 Well Depth (ft) 86.00
4.0 Well Casing Diameter (in) 4
1000 Depth to Water Before Purging (ft) 76.76
Conductivity Dissolved
(umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
4063 7.20 17.2,7 286 2.3 113.0
Pumping_ Rate Calculations
Flow Rate (Q = S/60) (gSl/min) 18.00
Time to evacuate 2 Casing Volumes ()
82.11 Number of casing Volumes._
Volume , if well evacuated to <1 r¥,ness () 0
"
Sample Container Preservative
Collected? Matrix Number Type Sample Filtered? Type Added?
y WATER 3 40mlVOA u HCl (pH<2), 4 Deg C y
y WATER 1 500-ml Poly u None N
y WATER 1 250-ml HOPE u H2SO4 (pH<2), 4 Deg C y
[ Arrived o__ri_ s_it_e _at 1207. Samples collected at 1212. Water was clear. Left site at 1214.
Signatu~e of Field Technician
~'", ,,.,_./<-., -rf-d';4)
Groundwater Discharge Permit
~
--, e· ~' -·_ -I • • • . . I . .
.: ('L .. •
-,•, EJ',,,IERGYFLl'EZ.S"
j,
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID 1W4-41 Sampling Program Chloroform Monitoring
Field Sample ID 1W4-41_08202024 Sam_e_ling Event 2024 Q3 Chloroform
Purge Date & Time 8/20/2024 11:55
Sample Date & Time 8/20/2024 11:55 [sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 29
Purging Method 2 Casings Previous Well Sampled 1W4-01
Casing Volume (gal) 11.45
Calculated Casing Volumes Purge Duration ()
pH Buffer 7.0 7.0 Well Depth (ft) 97.75
pH Buffer 4.0 4.0 Well Casing Diameter (in) 6
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 89.95
Conductivity Dissolved
Date/Time Gallons Purged (um hos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
8/20/202411:55 2661 7.34 17.03 303 0 96.1
Pumping Rate Calculations I Volume of water purged () Flow Rate (Q = S/60) (gal/min) 6.00
Time to evacuate 2 Casing Volumes () I Final Depth to Water (feet) 91.27 Number of casing Volumes
Volume, if well evacuated to dryness O 0
Name of Certified Analytical Laboratory
AWSL
Ana lyti cal Sam ples 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-ml HDPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Arrived on site at 1151. Samples collected at 1155. Water was clear. Left site at 1157.
Signature of Field Technician
~-" u=-~--o.L--/-(2:'~)
Groundwater Discharge Permit
,,---y-··e---=,--. tF-1· .• • . • ,F:l,,JE'Z.S
' • ~ y .• (. .~ •
_..
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID 1W4-42 Sampling Program Chloroform Monitoring
Field Sample ID 1W4-42_09122024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/11/2024 9:16
Sample Date & Time 9/12/2024 7:30 !§ampler TH/DL
Purging Equipment Pump Weather Conditions Partly cloudy
Pump Type Grundfos External Ambient Temperature (C) 21 .
Purging Method 2 Casings Previous Well Sampled 1W4-03
Casing Volume (gal) 9.10
Calculated Casing Volumes Purge Duration (min) 1.65
pH Buffer 7.0 7.0 Well Depth (ft) 86.00
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 72.05
Conductivity Dissolved
Date/Time Gallons Purged (gal) (umhos/cm) pH (pH Units) Temp (deg C) Redox (mV) Turbidity (NTU) Oxygen(%) Before/After
9/11/2024 9: 17 11.00 3940 7.45 15.80 287 1.2 100.1
9/12/2024 7:30 3669 7.30 14.75 Before
9/12/2024 7:31 3676 7.33 14.79 After
[volume of water purged (gals)
Pumping Rate Calculations
11.00 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 1.00
[ Final Depth to Water (feet) 83.12 Number of casing Volumes 1.20
Volume, if well evacuated to dryness (gals) 11.00
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 at 0912. Purge began at 0916. Purged well for a total of 1 minute. Purged well dry. Purge ended at 0917. Water was clear. Left site at 0920.
Arrived on site at 0726. Depth to water was 72.10. Samples bailed and collected at 0730. Left site at 0732.
Signature of Field Technician
~.,,,,u-_,__-;-/~4j
Groundwater Discharge Permit
t£ r----~~ ~y~ c..~
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID 1W4-43 Sampling Program Chloroform Monitoring
Field Sample ID 1W4-43 09172024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 9/16/2024 9:22
Sample Date & Time 9/17/2024 7:40 !sampler I TH/DL I
Purging Equipment Pump Weather Conditions Windy
Pump Type Grundfos External Ambient Temperature (C) 20
Purging Method 2 Casings Previous Well Sampled MW-32
Casing Volume (gal) 14.37
Calculated Casing Volumes Purge Duration (min) 2.61
pH Buffer 7.0 7.0 Well Depth (ft) 95.5
pH Buffer 4.0 4.0 Well Casing Diameter (in) 4
Specific Conductance (micromhos) 1000 Depth to Water Before Purging (ft) 73.48
Conductivity Dissolved
Date/Time Gallons Purged (gal) (umhos/cm) pH (pH Units) Temp (deg C) Redox(mV) Turbidity (NTU) Oxygen(%) Before/After
9/16/2024 9:24 22.00 3444 6.83 15.55 390 8.0 27.8
9/17/2024 7:40 3466 6.95 15.75 Before
9/17/2024 7:41 3469 6.94 15.71 After
Pumping Rate Calculations
[Volume of water purged (galsl 22.00 Flow Rate (Q = S/60) (gal/min) 11.00
Time to evacuate 2 Casing Volumes (min) 2.00 I Final Depth to Water (feet) 93.14 Number of casing Volumes 1.53
Volume, if well evacuated to dryness (gals) 22.00
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 HCI (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 HOPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[Arrived on site at 0736 . Depth to water was 73.42. Samples bailed and collected at 0740 . Left site at 0742 .
Signature of Field Technician
-=3~-~·--"'--I-A-/4-"~
Groundwater Discharge Permit
~~-s " .... -t£t ,,. -. ,''
J" i'.
. / ~y~
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-60 Sampling Program Chloroform Monitoring
Field Sample ID TW4-60 _08202024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time 8/20/2024 12:50
Sample Date & Time 8/20/2024 12:50 [sampler TH/DL
Purging Equipment Pump Weather Conditions Sunny
Pump Type Grundfos External Ambient Temperature (C) 30
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
8/20/2024 12:50 5.9 8.20 15.01 304 0 19.2
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-ml Poly u None N
Nitrate/nitrite as N y WATER 1 250-ml HOPE u H2SO4 (pH<2), 4 Deg C y
Comments:
[ Arrived in lab at 1246. Samples collected at 1250. Left site at 1253.
Signature of Field Technician
~", :;u-c-+/-a'.~)
-~, ?:-~.' l · ~Y.FIJIIELS ~~
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 O
Date/Time Gallons Purged
[volume of water purged ()
[ Final Depth to Water (feet)
Name of Certified Analytical Laboratory
AWSL
Analytical Sa'!lples Information
Type of Sample/Analysis
VOCs-Chloroform
Chloride
Nitrate/nitrite as N
Comments: I Duplicate of TW4-12
Signature of Field Technician
~a ,: n h L--J-;/ 4~
Groundwater Discharge Permit
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
TW4-65 Sampling Program Chloroform Monitoring
TW4-65 09122024 Sampling Event 2024 Q3 Chloroform
9/12/2024 7:40 !sampler TH/DL
Weather Conditions
External Ambient Temperature ()
Previous Well Sampled
Well Depth (ft)
Well Casing Diameter()
Depth to Water Before Purging (ft)
Conductivity _e_H Temp Redox Turbidity I Dissolved Oxygen I Before/After l
Pumping Rate Calculations
Flow Rate (Q = S/60) ()
Time to evacuate 2 Casing Volumes ()
Number of casing Volumes
Volume, if well evacuated to dryness ()
Sample Container Preservative
Collected? Matrix Number Type Sample Filtered? Type Added?
y WATER 3 40mlVOA u HCl (pH<2), 4 Deg C y
y WATER 1 500-ml Poly u None N
y WATER 1 250-ml HDPE u H2SO4 (pH<2), 4 Deg C y
Groundwater Discharge Permit
~ ' -~~~
~.--~YFUEZ.S
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID TW4-70 Sampling Program Chloroform Monitoring
Field Sample ID TW4-70 _09172024 Sampling Event 2024 Q3 Chloroform
Purge Date & Time
Sample Date & Time 9/17/2024 9:00 [sampler TH/DL
Purging Equipment Weather Conditions
Pump Type External Ambient Temperature O
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)
Date/Time Gallons Purged Conductivity pH Temp Redox Turbidity Dissolved Oxygen I Before/After I
I Volume of water purged ()
P umping Rate Calculations
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
Analytical Sam ples Information
Sample Container Preservative
Type of Sample/Analysis Collected? Matrix Number Type Sample Filtered? Typ e 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:
[ Duplicate of TW4-08
Signature of Field Technician
------, '· /,, ~ /
---_).: .. ,, '. Jl_.>'___..-!.---~·-;/-~ -~L ..... ~?)
Groundwater Discharge Permit
~~-·, e -t£..· .l --1· ' ,. v· .
-----: , ' /, • , 'E~Y~
Groundwater Monitoring Quality Assurance Plan
White Mesa Mill
Field Data Worksheet For Groundwater
Location ID 1W4-75 Sampling Program Chloroform Monitoring
Field Sample ID 1W4-75_09182024 Sampling_ Event 2024 Q3 Chloroform
Purge Date & Time
Sample Date & Time 9/18/2024 8:38 [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)
Date/Time Gallons Purged Conductivity pH Temp Redox Turbidity Dissolved Ox)lgen I Before/After l
[volume of water purged()
Pumping Rate Calculations
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
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 HDPE u H2SO4 (pH<2), 4 Deg C y
Comments: I Duplicate ofTW4-18
Signature of Field Technician
~., ',.,u><---/-;/ "?/ ./'~
TabC
Weekly and Monthly Depth to Water Data
Weekly Inspection Form
Date :z -1 -a.!I Name Du:.o C--ff mo<:? ):;a,.,,, a tin I(,· -ft:
ystem Operationa {If no note
Time Well De pth., Comments an v p roblems/corrective actions)
/ 0 l'·f MW-4 ~1 4q Flow
"'· 0
.... No
Meter "'I i},; 'R "I r:-~ r.. R ... No
nq~t:; MW-26 ...,<. /,.&j Flow .~.~ ... No
Meter oi 1 ~ L( s:r -:.; . ~ • No
It'-\< TW4-19 ,:1 ~r Flow 1 ln 0 .... No
Meter I I ~, c; _';l 'H\ nt) ... No
Jt,1.0 TW4-4 IA LJ 7--2. Flow It. {) .. No
Meter SJ ;.q; ,_, Sl 1 111116 No
ll<l?i<" TWN-2 91./.1"3 Flow l~.0 a. No
Meter 2. -r 1 , ~ g_ . ~ n "ia. No
I/JQn..2 TW4-22 ~q qi;-Flow ,r._f) ._ No
Meter , n -r " 1 <1 1ft • 7 'e:s No
0 ~ IS' I./ TW4-24 '"Tl , "2,:7 Flow I{ •. 1. ~ No
Meter ~ 1r o :1__7 '-4 '.l c:z <"' • No
17q._.2 /,. TW4-25 7:J. ()/,. Flow ,~.~ 1111& No
Meter 2 n -2.. 2 <i::t "T <'tJ "-91 No
,n,q TW4-1 IOt:;".~0 Flow /2,9. -No
Meter 4 f,. '-I q cu . ~ .._ No
10 0 9. TW4-2 JJfJ,t.l Flow I~-Sl .. No
Meter .("~ 1 r.. ~ t. . ..2 .. No
inn1J. TW4-11 ~SU~, Flow I {. 11
,.. No
Meter , q r1 q-S? ~ t. .. No -
Oi \ 0 TW4-21 7~ 2/ Flow I/,. () 91s No
Meter T1 ~ n i5lS? :in ~ No
oq,o TW4-37 -r'/,;;l.i Flow I sr fl ,_ No
M~ter '.1 <"''"',:; , 'A 1-1 q ,ag No
l)Q-~ I TW4-39 'j t:;' 0\ '-4 Flow I'll n -No
Meter '4 1 q_ 1 Sl ~ '-I 1IE No
I()~ Q TW4-40 , -1. SI~ Flow I 'ii {) llas-No
Meter 1 ~ 7 "'1 \.itil ,. , -r -.._ No
,o ~-;--TW4-41 ~q (}"2, Flow /... n .... No
Meter 1-f g -, !fl r: ; , n r:-"'!Ila 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 1-3-..l'(
Monthly Depth N?~~~:~ z;;;;;,.,-4
Time Well Depth* Time Well Depth*
as.:u, MW-4 82,C.Ct i 3 S: 8 TWN-1 "J.. I, JO
as:33 TW4-1 LQ~, :3~ I !:i Q3 TWN-2 SS:,a (,a
OS.:2.9 TW4-2 llQ,1fl 13~S TWN-3 ~5:. ~a
as1t.. TW4-3 fA~c'3~ i 3 ... , 3 TWN-4 (,,1-f.gQ
as~£ TW4-4 S~,:J.l j310 ,TWN-7 19,~I
az, ;1.. TW4-5 :t3,J5: (33~ TWN-18 '23, ':1.5.
ai~B TW4-6 Sll,9~-1 a""l '.B MW-27 59,f'Q~
QS:3~ TW4-7 5t:Z... ,9:3 1010 MW-30 15",3~
az1B TW4-8 S J5'.13 UU)_3 MW-31 ~s.11
OSI~ TW4-9 'L 6z9.
os,o TW4-10 :Zl,Q.2 .
a~ac. TW4-11 iSf.~<
0931 TW4-12 S: L a.a
a 9 :?:iS:-TW4-13 ~~. t~ Q 92-1 TW4-29 7.9..~7
a~a~ TW4-14 -::11.~, Q0\11 TW4-30 1 ~, '-1 l
OS:'23 MW-26 is::.1~ Q~U TW4-31 4-~3,:!J
azo:z TW4-16 1~.-~o £2g~, TW4-32 ,;-1, c.·o
09~'6 MW-32 ~3.~t.l 4gQ~ TW4-33 ::Z:~,9Q
Ql !1.3 TW4-18 1!:1.,8~ 09~ TW4-34 :z~.~~
IQ a._.;--TW4-19 11.. .. ~~ s_g~{J_ TW4-35 1,.r,,,.10
Q1':J.0. TW4-21 --:J."11 ~3 Q:9~2 TW4-36 <"~4 .2.._~
0.1.~''l TW4-22 (e9 c ~ t Q 1~7 TW4-37 -:1.li '{_L;'
n-51U TW4-23 -:1..1. '.:J. !;': QS:1...Q TW4-38 ,1.21
QJS:I TW4-24 l'.t~,2~ atWQ TW4-39 '"1.':l..,':1.~
{}_ Z':J..1 TW4-25 7..a, 1< asrs TW4-40 ':1.~,ID ·
QiS3: TW4-26 1£s:, as~a TW4-41 ~8''1,08
Q90S TW4-27 :1~.~3 Q~(l3 TW4-42 "16111
09 '-IQ TW4-28 ,-o. 13 091~ TW4-43 13,1./7
Comments: (Please note the well number for any comments)
* Depth is measured to the nearest 0.01 feet
Weekly Inspection Form
Date 1-a,':t -8'1 Nameij<" "'9=ry -Z::-...,,...c f./4, f/4~f
. S y'stem Operational (If : note
Time Well De oth"' Comments an v problems/corrective actions)
I) 9, 'I{) MW-4 ~I ib Flow ,._, " ... No
Meter 1,,/ n T , n ..., "'1 , "3 .... No
n~u~ MW-26 7'-/.CRC-Flow I '-l tZ 1fis No
Meter q 1,.y n -r ::i , ~ No
nq1q TW4-19 ,L'iiln Flow , '• .n :We No
Meter , \ 1 1 , no . 4 1 ,.. No
QqQ{ TW4-4 CJ':\ ~':l Flow h. n ... No
Meter ff 7 ,.1 7 .:r ,.q ... No
Oi~O TWN-2 ~£'": ~~ Flow , .,_ n --No
Meter .2. a l , :r. , i;z ,
,_ No
01 !:' I TW4-22 q o r;--r Flow I(. {] .. No
Meter , n, q-, ,. ~ Q ll!I; No
Ir, 7 '1,,. TW4-24 71., JI .. Flow ' c;: ~ ... No
Meter .1 ,: , ,. :1 q , -, q. .._ No
/J72.f TW4-25 7-; q~ Flow , .. , ~ lag No
Meter . .:, n ~ Q 1.1 -, -J _ "trt ~ No
n« LI q TW4-1 ,ncr "'' Flow J::Z n -.is No
Meter "" In /,. ~ ,.., q . I ..... No
/HI -1, ~ TW4-2 l(JJ,1S" Flow I lA {) 9-No
Meter ~ ~ '-11-l c.t ~ ..., ..,_ No
n~11 TW4-11 c:i,, 1.n Flow I a, .;z-.. No
Meter ~ 111 c: " . '1 ,:;-1M No
f7'1 I !1 TW4-21 7t:., 'f/) Flow I/,,. ~ "9!l6 No
Meter '317~ «~it:'. q, "filg No
11 ""1<~ TW4-37 q '!, ("J "' Flow I--, I"... ... No
Meter :i r-r::-z::-~ .., n .., --.-No
n«n~ TW4-39 7~"3{,. Flow J ~ f1 ..... No
Meter r;n I c;g ~~ 1--No
f)q t () TW4-40 ,r; j;t Flow IQ() !!s No
Meter 1 ~ Q rA '-I r ,. c;t a -No
09. ~" TW4-41 C\() q f'I Flow r.. I) )tes No
Meter ,.., ~ n .., o ,A _ c;::i ~ '1118-No
Operational Problems (Please list well number):
Corrective Action(s) Taken (Please list well number):
* Depth is measured to the nearest 0.01 feet.
Monthly Depth Check Form
Date 6 ... ,i-a# Name V,:, .. '7=-.r;,. ~«vf@/17
Time Well Depth* Time Well De~th*
Ql~Q MW-4 u.3;"' ,~ .,.._i TWN-1 1.l, g~
~9S:~ TW4-1 ,ai,u a.z~.a. TWN-2 &~,l~
QZ5::a TW4-2 i~ •IS:: ,~ao TWN-3 ~5.JI
l~IS TW4-3 ~~.15"' l~ I~ TWN-4 ,~.~lo
aqa:z TW4-4 91.~ :I tSO. ~ TWN-7 :z~."f.t
l'--lQ TW4-5 1!:!1 3 Q 1~09 TWN-18 Gi315:8
I~ l 9. TW4-6 81,Ja, 1~03 MW-27 S.9..1'1.
,~a.3 TW4-7 sa..11 lO~l MW-30 7..z;: 'Zn
l.,2.Z TW4-8 II§". f.t8 H2~ CA MW-31 ':1. a. l ,;-
I 6 \ S:::: TW4-9 22.LO. •
l~Q~ TW4-10 :J[.~5°"
Q~3Z TW4-11 ~t. 09:
13~9 TW4-12 s.1... ~a
J 3 !f ,§" TW4-13 ~B.."10 Jl 3-1" TW4-29 SQ, l 3
13'.I~ TW4-14 1.1... 5:.1.. l]a.3 TW4-30 l{, t. a
Q8;31 MW-26 :Zl.,i3 l'?tl la TW4-31 1(,. .. 3,
H23S TW4-16 1<,11 135C TW4-32 s.i.. !a
!Q~I MW-32 83,916 13 Qt. TW4-33 1!, gs
I~~ I TW4-18 :t.5-, l1l LJ:SQ TW4-34 Iat.S:a
Q~36" TW4-19 ::i t1e u l l.2."1! TW4-35 1,.;u
QZ.3i: TW4-21 :Ztl. 3~ l 3 !i.L TW4-36 Uf.a
Qi 1:3 TW4-22 lt21'-tfi 13 I l> TW4-37 19. t.l
l~L 3 TW4-23 7.91."1..C 12.1.1 TW4-38 ,a"a~
asa~ TW4-24 llil~ aaas: TW4-39 J3.~i
'27~.a. TW4-25 1 t 1:Xu Q9(~ TW4-40 72.,92..
t~OS TW4-26 :i:,. lg_ aso~ TW4-41 a:~.~n
l3 I 3 TW4-27 "19.t-1 L'..303 TW4-42 1a. • .2.~
,,sa. TW4-28 ra.« 132.0 TW4-43 .,,.s.
Comments: (Please note the well number for any comments)
• A - • a ....... --··---~
* Depth is measured to the nearest 0.01 feet
Weekly Inspection Form
Date 11 -il4 -2:--'1 Name ,..-----.,. --~4 ...J .1 e c;., ... c.ry,rn -C« a-e c:r: I£, I L J"<-¥7' 7
. S ystem O perational (If no note
Time Well Depth* Comments an v problems/correct ive actions }
.()q oq MW-4 9.'-1 6,,/ L{ Flow -"'d .. No
Meter ,.(, ..n ~ ,_ r; '3 '1 1 .. No
08'50 MW-26 ~~-jq Flow I '-4, .:2 ... No
Meter q -:i, , q '-t , c;--9lls No
1()4¥ TW4-19 "'1 ':\ 2. fl Flow I '-l st .... No
Meter 1 :in~ ,;-~o "In ~ No
f) 'I,._-, TW4-4 tt..31-f Flow ,~.n 1111: No
Meter 'i ; '\ o Sl q . '1 .. No
051.:J.fl TWN-2 ~,; 13 Flow , < I{ • No
Meter 2 :sr 11 ; 7 3 ~ o ,. No
n~'l.~ TW4-22 ~~. 7J./ Flow JI. 1 ]fa No
Meter 1 o a -, ·•17 -, . 7 -No
0~1( .. TW4-24 '71 t;"'J; Flow I/ .. n a No
Meter ~ <1, 7f~_1,.q .. No
ni I I TW4-25 -r:J..,"Y'-5"" Flow ,--1.n • No
Meter ::z n C11 .;r /) -, '-I n n 95-No
loq I LI TW4-1 /l)/(.:l\ Flow J"l.n • No
Meter 4 ,. q "31 Lr, ~ No
nqn~ TW4-2 <46\ :1.-3 Flow ,er. 0 ..... No
Meter < ,i 7 q .1 .,-n "!Ills No
ntt S'-, TW4-11 QI, ~5' Flow l l,, 11 ..... No
Meter ~ ,, "f s , . q ~ .. No
OBDr TW4-21 ;; ~ :1 Flow JI. n i,-No
Meter ~ 7 'f q -r o t.., "I 2 ... No
0~17 TW4-37 .., :'\ jf ; Flow 17, ~ ~ No
Meter ::::1 ~,, &.J Qt" .. ..., '9ilB. No
Of!l-13 TW4-39 1'1.'l.u Flow I '1 q ,. ... No
Meter /. I ':Ii q c:;-: ',' i .... No
Q(l1~ TW4-40 -, 'Pi. '5'11 Flow I s,n • No
Meter , ~ qq ,;-1, 1 n, ... No
n'f 1,q TW4-41 q 0. (J ~ Flow ~-f) "'k No
Meter 4q ~ 1~,:;-.. 1ur -No
Operational Problems (Please list well number):
Corrective Action(s) Taken (Please list well number):
T Depth is measured to the nearest 0.01 feet.
Weekly Inspection Form
Date Cf/ l'l /;w,2~ _N_a_m_e _--(o_°'-_n __ ne_r _____ "o .... 11...,,J __ i:a ++'d--------
Svstem Operational (If no note
Time Well De pth* Comments an v o roblems/corrective actions)
f\Gl:U. MW-4 s:<.~_'{q Flow 4.D (Yes )No
Meter 'i l:t'-. 7:21.. I '1 I Yes-i No
\. __,
O'lD'I MW-26 7K .'t;l. Flow l~.5 (Y_es,_ No
Meter q37755_7 ( Yes J No
lnrr> TW4-19 73.C:.I Flow r!r.f:: 15 .. t; /'"'fes.. No
Meter 11.~blO.:i.¼ ,-r res \No
O'f"iO TW4-4 ~5.5~ Flow \L,O ,..xas )Jo
Meter ~1 'i 'i-.11. ~ ( Yes ;No
'
OW'-11 TWN-2 ,Co .l.<. Flow 15,Q (YP~J No
Meter .,,_q 1qS<~.7~ ( Yes) No
~
·os5:z. TW4-22 b'f-'f7 Flow lb,0 ( 'u;u;:__ J No
Meter JO'l 3 \ f>'I. l.j r -v-es)No
~~"i, TW4-24 LSC~\ Flow IS.5 C.Yes ....N o
Meter 1 S'-l~~L{~_7q ( Yes ~o
oi3.5 TW4-25 TS Ol Flow ·IS.o (Y e.s.>No
Meter 2.11'-b'7. 52.. (Yes No
()q~ TW4-1 IM SC;L... Flow ,~.t; ~ }Jo
Meter &:l7l1.~.~ (__ Yes No
~
OCf:2.0 TW4-2 1n, Lf(;. Flow ,,.D cY~o
Meter 5'f ◊'2b l , 7 ( Yes )No
~
~ TW4-11 9D I 'l, Flow lb.0 (Yes )No
D'I l5 Meter :J...07035 7 (Yes) No
()KY\ TW4-21 1L.1~ Flow ll-..t) (Yes )'.J o
Meter 7 ~'!Jl'll;40.'3S (Yes )No
o~~ TW4-37 7b.l l Flow ,&.O ~ No.•
M~ter '1..s; x,.1.:1 t I . :;t__ r nrs 1 No
6l '1 03 TW4-39 7&..14. Flow lf(.O (-Yes )No
Meter (;..'lg 81..3.c; /"Yes_\No
ocpn TW4-40 7q_ 4r., Flow -Ii.o (Yes '1-Jo
Meter 1'10'i001.50 / res ')\Jo
0'-t~i; TW4-41 q1.02 Flow Co.O ,-Y~s ->Jo
Meter 4Gl779;;l..b0 r 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.
TabD
Kriged Current Quarter Groundwater Contour Map, Details Map, and Depth to Water Summary
Name: Tanner Holliday, Deen Lyman
Date: 9/23/2024 -9/25/2024
Depth to Depth to Depth to Water
Date Time Well Water (ft.) Date Time Well Water (ft.) Date Time Well (ft.)
9/25/2024 836 MW-01 65.33 9/23/2024 813 MW-04 85 ,36 9/25/2024 900 PIEZ-01 68-15
9/25/2024 1313 MW-02 109 ,36 9/23/2024 818 TW4-0I 98 .80 9/25/2024 924 PIEZ-02 48.68
9/25/2024 1001 MW-OJA 83 .75 9/23/2024 807 TW4-02 103 ,77 9/25/2024 1007 PIEZ-03A 58-18
9/25/2024 816 MW-05 107 .55 9/23/2024 847 TW4-03 66 .77 9/25/2024 829 PIEZ-04 70 .61
9/25/2024 928 MW-11 85 .19 9/23/2024 830 TW4-04 89 .23 9/25/2024 831 PIEZ-05 68.79
9/25/2024 824 MW-12 109.14 9/23/2024 853 TW4-05 74 .17 9/25/2024 903 TWN-01 71.95
9/25/2024 920 MW-14 101.04 9/23/2024 839 TW4-06 81 27 9/25/2024 723 TWN-02 86 _80
9/25/2024 916 MW-15 104.85 9/23/2024 842 TW4-07 82.83 9/25/2024 1015 TWN-03 45 .06
9/25/2024 954 MW-17 72 .55 9/23/2024 844 TW4-08 85.78 9/25/2024 1003 TWN-04 64 .98
9/25/2024 843 MW-18 74 .68 9/23/2024 851 TW4-09 72 09 9/25/2024 849 TWN-06 81.57
9/25/2024 855 MW-19 67 ,60 9/23/2024 855 TW4-IO 71.36 9/25/2024 830 TWN-07 79.31
9/25/2024 1312 MW-20 84 ,63 9/23/2024 801 TW4-11 90.44 9/25/2024 908 TWN-14 58.63
9/25/2024 1238 MW-22 66.03 9/23/2024 800 TW4-12 57 .65 9/25/2024 915 TWN-16 48 .13
9/25/2024 829 MW-23 113 62 9/23/2024 806 TW4-13 58 54 9/25/2024 941 TWN-18 63.52
9/25/2024 1319 MW-24A 108.94 9/23/2024 810 TW4-14 77 61 9/25/2024 1110 TWN-19 53 94
9/25/2024 1322 MW-24 107 77 9/23/2024 857 TW4-16 75.03 9/25/2024 824 TWN-20 78.45
9/25/2024 933 MW-25 83 .18 9/23/2024 901 TW4-18 75 .21 9/25/2024 817 TWN-21 79 .10
9/25/2024 755 MW-26 75 .20 9/23/2024 1024 TW4-19 73 15 9/25/2024 1446 DR-05 83 .15
9/25/2024 1327 MW-27 59 .70 9/23/2024 710 TW4-21 76 .18 9/25/2024 1442 DR-06 93 .91
9/25/2024 712 MW-28 74 .57 9/23/2024 741 TW4-22 92 .15 9/25/2024 840 DR-07 91.80
9/25/2024 1301 MW-29 106.18 9/23/2024 836 TW4-23 77.88 9/25/2024 1436 DR-08 51.46
9/25/2024 1251 MW-30 75 ,57 9/23/2024 734 TW4-24 67 .61 9/25/2024 1429 DR-09 86.42
9/25/2024 1244 MW-31 70 .08 9/23/2024 716 TW4-25 74 .24 9/25/2024 1424 DR-10 78 .26
9/25/2024 844 MW-32 83 ,87 9/23/2024 834 TW4-26 76 .27 9/25/2024 1227 DR-II 97.80
9/25/2024 948 MW-33 DRY 9/23/2024 812 TW4-27 79 .65 9/25/2024 1222 DR-12 DRY
9/25/2024 900 MW-34 107 .06 9/23/2024 802 TW4-28 50 .63 9/25/2024 1217 DR-13 69.50
9/25/2024 832 MW-35 112 .21 9/23/2024 814 TW4-29 80 24 9/25/2024 1416 DR-14 76.04
9/25/2024 835 MW-36 110.48 9/23/2024 751 TW4-30 75 .66 9/25/2024 1319 DR-15 92 .68
9/25/2024 905 MW-37 105 .82 9/23/2024 749 TW4-31 76.41 9/25/2024 1411 DR-17 64 48
9/25/2024 1302 MW-38 69 ,91 9/23/2024 804 TW4-32 58.02 9/25/2024 1344 DR-19 63.33
9/25/2024 1257 MW-39 63 .96 9/23/2024 747 TW4-33 80 .13 9/25/2024 1340 DR-20 55 72
9/25/2024 945 MW-40 79 .78 9/23/2024 814 TW4-34 78 .62 9/25/2024 1328 DR-21 100.23
9/25/2024 1309 MW-41B 108.15 9/23/2024 753 TW4-35 76 .30 9/25/2024 1353 DR-22 DRY
MW-26=TW4-l5 9/23/2024 808 TW4-36 59 .60 9/25/2024 1333 DR-23 70.39
MW-32=TW4-17 9/23/2024 746 TW4-37 67 .74 9/25/2024 1400 DR-24 44 79
Comments: 9/23/2024 849 TW4-38 62 .00
9/23/2024 751 TW4-39 70 .55
9/23/2024 838 TW4-40 73 14
9/23/2024 825 TW4-41 90.89
9/23/2024 745 TW4-42 72.47
9/23/2024 755 TW4-43 73 .61
TabE
Kriged Previous Quarter Groundwater Contour Map
TabF
Depths to Groundwater and Elevations and Hydrographs of Groundwater Elevations over Time for
Chloroform Monitoring Wells
Water Levels and Data over Time
White Mesa Mill -Well MW 4
Total or
Measuring Measured Tota l
Water Land Point Date Of Depth to Depth to Total
Elevation Surface Elevation Length Of Monitoring Water Water Depth Of
(WL) (LSD) (MP) Riser (L) (blw.MP) (blw.LSD) Well
5 620 .77 5 622.33 1.56 123.6
5,527.63 09/25/79 94.70 93.14
5,527.63 10/10/79 94.70 93.14
5,528.43 01/10/80 93.90 92.34
5,529.93 03/20/80 92.40 90.84
5,528.03 06/17/80 94.30 92.74
5,528.03 09/15/80 94.30 92.74
5,527.93 10/08/80 94.40 92.84
5,527.93 02/12/81 94.40 92.84
5,525.93 09/01/84 96.40 94.84
5,528.33 12/01/84 94.00 92.44
5,528.13 02/01/85 94.20 92.64
5,528.33 06/01/85 94.00 92.44
5,528.93 09/01/85 93.40 91.84
5,528.93 10/01/85 93.40 91.84
5,528.93 11/01/85 93.40 91.84
5,528.83 12/01/85 93.50 91.94
5,512.33 03/01/86 110.00 108.44
5,528.91 06/19/86 93.42 91.86
5,528.83 09/01/86 93.50 91.94
5,529.16 12/01/86 93.17 91.61
5,526.66 02/20/87 95.67 94.11
5,529.16 04/28/87 93.17 91.61
5,529.08 08/14/87 93.25 91.69
5,529.00 11/20/87 93.33 91.77
5,528.75 01/26/88 93.58 92.02
5,528.91 06/01/88 93.42 91.86
5,528.25 08/23/88 94.08 92.52
5,529.00 11/02/88 93.33 91.77
5,528.33 03/09/89 94.00 92.44
5,529.10 06/21/89 93.23 91.67
5,529.06 09/01/89 93.27 91.71
5,529.21 11/15/89 93.12 91.56
5,529.22 02/16/90 93.11 91.55
5,529.43 05/08/90 92.90 91.34
5,529.40 08/07/90 92.93 91.37
5,529.53 11/13/90 92.80 91.24
5,529.86 02/27/91 92.47 90.91
5,529.91 05/21/91 92.42 90.86
5,529.77 08/27/91 92.56 91.00
5,529.79 12/03/91 92.54 90.98
5,530.13 03/17/92 92.20 90 .64
5,529.85 06/11/92 92.48 90.92
5,529.90 09/13/92 92.43 90.87
Water Levels and Data over Time
White Mesa Mill -Well MW 4
Total or
Measuring Measured Total
Water Land Point Date Of Depth to Depth to Total
Elevation Surface Elevation Length Of Monitoring Water Water Depth Of
(WL) (LSD) (MP) Riser (L) (blw.MP) (blw.LSD) Well
5,620.77 5,622.33 1.56 123.6
5,529.92 12/09/92 92.41 90.85
5,530.25 03/24/93 92.08 90.52
5,530.20 06/08/93 92.13 90.57
5,530.19 09/22/93 92.14 90.58
5,529.75 12/14/93 92.58 91.02
5,530.98 03/24/94 91.35 89.79
5,531.35 06/15/94 90.98 89.42
5,531.62 08/18/94 90.71 89.15
5,532.58 12/13/94 89.75 88.19
5,533.42 03/16/95 88.91 87.35
5,534.70 06/27/95 87.63 86.07
5,535.44 09/20/95 86.89 85.33
5,537.16 12/11/95 85.17 83.61
5,538.37 03/28/96 83.96 82.40
5,539.10 06/07/96 83.23 81.67
5,539.13 09/16/96 83.20 81.64
5,542.29 03/20/97 80.04 78.48
5,551.58 04/07/99 70.75 69.19
5,552.08 05/11/99 70.25 68.69
5,552.83 07/06/99 69.50 67.94
5,553.47 09/28/99 68.86 67.30
5,554.63 01/03/00 67.70 66.14
5,555.13 04/04/00 67.20 65.64
5,555.73 05/02/00 66.60 65.04
5,556.03 05/11/00 66.30 64.74
5,555.73 05/15/00 66.60 65.04
5,555.98 05/25/00 66.35 64.79
5,556.05 06/09/00 66.28 64.72
5,556.18 06/16/00 66.15 64.59
5,556.05 06/26/00 66.28 64.72
5,556.15 07/06/00 66.18 64.62
5,556.18 07/13/00 66.15 64.59
5,556.17 07/18/00 66.16 64.60
5,556.26 07/25/00 66.07 64.51
5,556.35 08/02/00 65.98 64.42
5,556.38 08/09/00 65.95 64.39
5,556.39 08/15/00 65.94 64.38
5,556.57 08/31/00 65.76 64.20
5,556.68 09/08/00 65.65 64.09
5,556.73 09/13/00 65.60 64.04
5,556.82 09/20/00 65.51 63.95
5,556.84 09/29/00 65.49 63.93
5,556.81 10/05/00 65.52 63.96
Water Levels and Data over Time
White Mesa Mill -Well MW 4
Total or
Measuring Measured Total
Water Land Point Date Of Depth to Depth to Total
Elevation Surface Elevation Length Of Monitoring Water Water Depth Of
(WL) (LSD) (MP) Riser (L) (blw.MP) (blw.LSD) Well
5,620.77 5,622.33 1.56 123.6
5,556.89 10/12/00 65.44 63.88
5,556.98 10/19/00 65.35 63.79
5,557.01 10/23/00 65.32 63.76
5,557.14 11/09/00 65.19 63.63
5,557.17 11/14/00 65.16 63.60
5,556.95 11/21/00 65.38 63.82
5,557.08 11/30/00 65.25 63.69
5,557.55 12/07/00 64.78 63.22
5,557.66 01/14/01 64.67 63.11
5,557.78 02/09/01 64.55 62.99
5,558.28 03/29/01 64.05 62.49
5,558.23 04/30/01 64.10 62.54
5,558.31 05/31/01 64.02 62.46
5,558.49 06/22/01 63.84 62.28
5,558.66 07/10/01 63.67 62.11
5,559.01 08/20/01 63.32 61.76
5,559.24 09/19/01 63.09 61.53
5,559.26 10/02/01 63.07 61.51
5,559.27 11/08/01 63.06 61.50
5,559.77 12/03/01 62.56 61.00
5,559.78 01/03/02 62.55 60.99
5,559.96 02/06/02 62.37 60.81
5,560.16 03/26/02 62.17 60.61
5,560.28 04/09/02 62.05 60.49
5,560.76 05/23/02 61.57 60.01
5,560.58 06/05/02 61.75 60.19
5,560.43 07/08/02 61.90 60.34
5,560.44 08/23/02 61.89 60.33
5,560.71 09/11/02 61.62 60.06
5,560.89 10/23/02 61.44 59.88
5,557.86 11/22/02 64.47 62.91
5,561.10 12/03/02 61.23 59.67
5,561.39 01/09/03 60.94 59.38
5,561.41 02/12/03 60.92 59.36
5,561.93 03/26/03 60.40 58.84
5,561.85 04/02/03 60.48 58.92
5,536.62 05/01/03 85.71 84.15
5,528.56 06/09/03 93.77 92.21
5,535.28 07/07/03 87.05 85.49
5,534.44 08/04/03 87.89 86.33
5,537.10 09/11/03 85.23 83.67
5,539.96 10/02/03 82.37 80.81
5,535.91 11/07/03 86.42 84.86
Water Levels and Data over Time
White Mesa Mill -Well MW 4
Total or
Measuring Measured Total
Water Land Point Date Of Depth to Depth to Total
Elevation Surface Elevation Length Of Monitoring Water Water Depth Of
(WL) (LSD) (MP) Riser (L) (blw.MP) (blw.LSD) Well
5,620.77 5,622.33 1.56 123.6
5,550.70 12/03/03 71.63 70.07
5,557.58 01/15/04 64.75 63.19
5,558.80 02/10/04 63.53 61.97
5,560.08 03/28/04 62.25 60.69
5,560.55 04/12/04 61.78 60.22
5,561.06 05/13/04 61.27 59.71
5,561.48 06/18/04 60.85 59.29
5,561.86 07/28/04 60.47 58.91
5,529.17 08/30/04 93.16 91.60
5,536.55 09/16/04 85.78 84.22
5,529.00 10/11/04 93.33 91.77
5,541.55 11/16/04 80.78 79.22
5,541.12 12/22/04 81.21 79.65
5,540.59 01/18/05 81.74 80.18
5,542.85 02/28/05 79.48 77.92
5,537.91 03/15/05 84.42 82.86
5,548.67 04/26/05 73.66 72.10
5,549.53 05/24/05 72.80 71.24
5,544.36 06/30/05 77.97 76.41
5,545.16 07/29/05 77.17 75.61
5,544.67 09/12/05 77.66 76.10
5,541.28 09/27/05 81.05 79.49
5,536.96 12/07/05 85.37 83.81
5,546.49 03/08/06 75.84 74.28
5,546.15 06/13/06 76.18 74.62
5,545.15 07/18/06 77.18 75.62
5,545.91 11/17/06 76.42 74.86
5,545.90 02/27/07 76.43 74.87
5,548.16 05/02/07 74.17 72.61
5,547.20 08/13/07 75.13 73.57
5,547.20 10/10/07 75.13 73.57
5,547.79 03/26/08 74.54 72.98
5,545.09 06/25/08 77.24 75.68
5,550.36 08/26/08 71.97 70.41
5,550.39 10/14/08 71.94 70.38
5,542.25 03/03/09 80.08 78.52
5,542.25 06/24/09 80.08 78.52
5,550.19 09/10/09 72.14 70.58
5,550.94 12/11/09 71.39 69.83
5,546.08 03/11/10 76.25 74.69
5,550.98 05/11/10 71.35 69.79
5,548.33 09/29/10 74.00 72.44
5,551.01 12/21/10 71.32 69.76
Water Levels and Data over Time
White Mesa Mill -Well MW 4
Total or
Measuring Measured Total
Water Land Point Date Of Depth to Depth to Total
Elevation Surface Elevation Length Of Monitoring Water Water Depth Of
(WL) (LSD) (MP) Riser (L) (blw.MP) (blw.LSD) Well
5,620 .77 5,622.33 1.56 123.6
5,547 .00 02/28/11 75.33 73 .77
5,557.54 06/21/11 64.79 63.23
5,551.14 09/20/11 71.19 69.63
5,550.32 12/21/11 72.01 70.45
5,551.22 03/27/12 71.11 69.55
5,551.29 06/28/12 71.04 69.48
5,550.29 09 /27/12 72.04 70.48
5,549.31 12/28/12 73.02 71.46
5,552.30 03 /28/13 70.03 68.47
5,550.18 06 /27/13 72.15 70.59
5,552.55 09/27/13 69.78 68.22
5,553.23 12/20/13 69.10 67.54
5,551.91 03/27/14 70.42 68.86
5,552.93 06/25/14 69.40 67.84
5,552.23 09/25/14 70.10 68.54
5,552.08 12/17/14 70.25 68.69
5,551.13 03/26/15 71.20 69.64
5,556.02 06/22/15 66.31 64.75
5,543.38 09/30/15 78.95 77.39
5,551.13 12/02/15 71.20 69 .64
5,542.10 03/30/16 80.23 78.67
5,542.31 06 /30/16 80.02 78.46
5,540.96 09/29/16 81.37 79.81
5,540.65 12/21/16 81.68 80.12
5,542.05 03/30/17 80.28 78.72
5,550.28 06/27/17 72.05 70.49
5,534.84 09/28/17 87.49 85.93
5,532.41 11/30/17 89.92 88.36
5,534.64 03 /28/18 87.69 86.13
5,539.53 06/22/18 82.80 81.24
5,537.04 09/24/18 85.29 83 .73
5,537.82 12/17/18 84.51 82.95
5,536.10 03/25/19 86.23 84.67
5,536.20 06/24/19 86.13 84.57
5,538.67 08/12/19 83.66 82.10
5,533.67 11/18/19 88.66 87 .10
5,525.79 02/10/20 96.54 94 .98
5,533.63 05/04/20 88.70 87.14
5,536.94 09/21/20 85.39 83 .83
5,535.31 12/28/20 87.02 85.46
5,539.70 03/11/21 82.63 81 .07
5,540.44 06/24/21 81.89 80.33
5,540.65 08/13/21 81.68 80.12
Water Levels and Data over Time
White Mesa Mill -Well MW 4
Total or
Measuring Measured Total
Water Land Point Date Of Depth to Depth to Total
Elevation Surface Elevation Length Of Monitoring Water Water Depth Of
(WL) (LSD) (MP) Riser (L) (blw.MP) (blw.LSD) Well
5,620.77 5,622.33 1.56 123.6
5,539.10 12/30/21 83.23 81.67
5,539.70 02/10/22 82.63 81.07
5,540.38 06/28/22 81.95 80.39
5,540.67 08/15/22 81.66 80.10
5,539.98 11/17/22 82.35 80.79
5,539.65 03/24/23 82.68 81.12
5,537.60 06/26/23 84.73 83.17
5,541.11 09/25/23 81.22 79.66
5,539.99 11/20/23 82.34 80.78
5,538.84 03/25/24 83.49 81.93
5,536.70 06/26/24 85.63 84.07
5,536.97 09/23/24 85.36 83.8
Water Levels and Data over Time
White Mesa Mill -Well TW 4-1
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
z 5,620.77 5,618.58 1.02 111.30
5,537.23 11/08/99 81.35 80.33
5,537.38 11/09/99 81.20 80.18
5,537.48 01/02/00 81.10 80.08
5,537.48 01/10/00 81.10 80.08
5,537.23 01/17/00 81.35 80.33
5,537.28 01/24/00 81.30 80.28
5,537.28 02/01/00 81.30 80.28
5,537.18 02/07/00 81.40 80.38
5,537.48 02/14/00 81.10 80.08
5,537.48 02/23/00 81.10 80.08
5,537.58 03/01/00 81.00 79.98
5,537.68 03/08/00 80.90 79.88
5,537.98 03/15/00 80.60 79.58
5,537.68 03/20/00 80.90 79.88
5,537.68 03/29/00 80.90 79.88
5,537.43 04/04/00 81.15 80.13
5,537.18 04/13/00 81.40 80.38
5,537.48 04/21/00 81.10 80.08
5,537.68 04/28/00 80.90 79.88
5,537.58 05/01/00 81.00 79.98
5,537.88 05/11/00 80.70 79.68
5,537.58 05/15/00 81.00 79.98
5,537.88 05/25/00 80.70 79.68
5,537.88 06/09/00 80.70 79.68
5,537.90 06/16/00 80.68 79.66
5,537.88 06/26/00 80.70 79.68
5,538.10 07/06/00 80.48 79.46
5,538.04 07/13/00 80.54 79.52
5,538.16 07/18/00 80.42 79.40
5,538.42 07/27/00 80.16 79.14
5,538.56 08/02/00 80.02 79.00
5,538.68 08/09/00 79.90 78.88
5,538.66 08/15/00 79.92 78.90
5,538.33 08/31/00 80.25 79.23
5,539.18 09/01/00 79.40 78.38
5,539.12 09/08/00 79.46 78.44
5,539.34 09/13/00 79.24 78.22
5,539.50 09/20/00 79.08 78.06
5,539.69 10/05/00 78.89 77.87
5,540.33 11/09/00 78.25 77.23
5,540.74 12/06/00 77.84 76.82
5,542.39 01/14/01 76.19 75.17
5,543.69 02/02/01 74.89 73.87
Water Levels and Data over Time
White Mesa Mill -Well TW 4-1
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
z 5,620.77 5,618.58 1.02 111.30
5,544.96 03/29/01 73.62 72.60
5,545.45 04/30/01 73.13 72.11
5,545.89 05/31/01 72.69 71.67
5,546.19 06/21/01 72.39 71.37
5,546.50 07/10/01 72.08 71.06
5,547.18 08/20/01 71.40 70.38
5,547.59 09/19/01 70.99 69.97
5,547.84 10/02/01 70.74 69.72
5,548.12 11/08/01 70.46 69.44
5,548.65 12/03/01 69.93 68.91
5,548.87 01/03/02 69.71 68.69
5,549.37 02/06/02 69.21 68.19
5,550.00 03/26/02 68.58 67.56
5,550.22 04/09/02 68.36 67.34
5,550.81 05/23/02 67.77 66.75
5,550.79 06/05/02 67.79 66.77
5,551.08 07/08/02 67.50 66.48
5,551.54 08/23/02 67.04 66.02
5,551.79 09/11/02 66.79 65.77
5,552.19 10/23/02 66.39 65.37
5,552.27 11/22/02 66.31 65.29
5,552.48 12/03/02 66.10 65.08
5,552.74 01/09/03 65.84 64.82
5,552.92 02/12/03 65.66 64.64
5,553.40 03/26/03 65.18 64.16
5,553.48 04/02/03 65.10 64.08
5,552.32 05/01/03 66.26 65.24
5,550.53 06/09/03 68.05 67.03
5,550.09 07/07/03 68.49 67.47
5,549.64 08/04/03 68.94 67.92
5,549.31 09/11/03 69.27 68.25
5,549.58 10/02/03 69.00 67.98
5,549.50 11/07/03 69.08 68.06
5,550.07 12/03/03 68.51 67.49
5,551.86 01/15/04 66.72 65.70
5,552.57 02/10/04 66.01 64.99
5,553.63 03/28/04 64.95 63.93
5,554.04 04/12/04 64.54 63.52
5,554.60 05/13/04 63.98 62.96
5,556.28 06/18/04 62.30 61.28
5,556.61 07/28/04 61.97 60.95
5,554.21 08/30/04 64.37 63.35
5,553.49 09/16/04 65.09 64.07
Water Levels and Data over Time
White Mesa Mill -Well TW 4-1
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring {blw.MP) (blw.LSD) Well
z 5,620.77 5,618.58 1.02 111.30
5,552.53 10/11/04 66.05 65.03
5,552.42 11/16/04 66.16 65.14
5,552.46 12/22/04 66.12 65.10
5,552.07 01/18/05 66.51 65.49
5,552.21 02/28/05 66.37 65.35
5,552.26 03/15/05 66.32 65.30
5,552.30 04/26/05 66.28 65.26
5,552.25 05/24/05 66.33 65.31
5,552.22 06/30/05 66.36 65.34
5,552.15 07/29/05 66.43 65.41
5,552.47 09/12/05 66.11 65.09
5,552.50 12/07/05 66.08 65.06
5,552.96 03/08/06 65.62 64.60
5,553.23 06/14/06 65.35 64.33
5,557.20 07/18/06 61.38 60.36
5,553.32 11/07/06 65.26 64.24
5,554.35 02/27/07 64.23 63.21
5,554.07 05/02/07 64.51 63.49
5,554.07 08/14/07 64.51 63.49
5,553.88 10/10/07 64.70 63.68
5,555.73 03/26/08 62.85 61.83
5,556.60 06/24/08 61.98 60.96
5,556.83 08/26/08 61.75 60.73
5,556.87 10/14/08 61.71 60.69
5,556.90 03/10/09 61.68 60.66
5,556.91 06/24/09 61.67 60.65
5,556.61 09/10/09 61.97 60.95
5,556.78 12/11/09 61.8 60.78
5,556.75 03/11/10 61.83 60.81
5,556.19 05/11/10 62.39 61.37
5,555.26 09/29/10 63.32 62.30
5,554.66 12/21/10 63.92 62.90
5,554.74 02/28/11 63.84 62.82
5,554.57 06/21/11 64.01 62.99
5,554.13 09/20/11 64.45 63.43
5,554.54 12/21/11 64.04 63.02
5,553.64 03/27/12 64.94 63.92
5,553.66 06/28/12 64.92 63.90
5,553.73 09/27/12 64.85 63.83
5,553.59 12/28/12 64.99 63.97
5,554.73 03/28/13 63.85 62.83
5,554.44 06/27/13 64.14 63.12
5,554.37 09/27/13 64.21 63.19
Water Levels and Data over Time
White Mesa Mill -Well TW 4-1
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
z 5,620.77 5,618.58 1.02 111.30
5,553.92 12/20/13 64.66 63.64
5,553.20 03/27/14 65.38 64 .36
5,552.20 06/25/14 66.38 65.36
5,551.13 09/25/14 67.45 66.43
5,550.72 12/17/14 67.86 66.84
5,546.50 03/26/15 72.08 71.06
5,544.18 06/22/15 74.40 73.38
5,535.85 09/30/15 82.73 81.71
5,529.54 12/02/15 89.04 88 .02
5,527.55 03/30/16 91.03 90.01
5,525.92 06/30/16 92.66 91.64
5,524.48 09/29/16 94.10 93.08
5,533.15 12/21/16 85.43 84.41
5,527.92 03/30/17 90.66 89.64
5,534.48 06/27/17 84.10 83.08
5,524.98 09/28/17 93.60 92.58
5,525.88 11/30/17 92.70 91.68
5,526.18 03/28/18 92.40 91.38
5,515.78 06/22/18 102.80 101.78
5,510.83 09 /24 /18 107.75 106 .73
5,542.47 12/17/18 76.11 75.09
5,531.82 03 /25/19 86.76 85.74
5,539.90 06/24/19 78.68 77.66
5,538.56 08/12/19 80.02 79.00
5,510.85 11/18/19 107.73 106.71
5,513.12 02/10/20 105.46 104.44
5,512.44 05/04/20 106.14 105.12
5,517.82 09/21/20 100.76 99.74
5,520.38 12/28/20 98.20 97.18
5,513.47 03/11/21 105.11 104.09
5,513.44 06/24/21 105.14 104 .12
5,515.25 08/13/21 103.33 102.31
5,513.03 12/30/21 105.55 104.53
5,513.17 02/10/22 105.41 104.39
5,513.35 06/28/22 105.23 104.21
5,518.60 08/15/22 99.98 98.96
5,517.52 11/17/22 101.06 100.04
5,516.08 03/24/23 102.50 101.48
5,513.83 06/26/23 104.75 103.73
5,515.88 09/25/23 102.70 101.68
5,512 .89 11/20/23 105.69 104 .67
5,518.08 03/25/24 100.50 99.48
5,514.45 06/26/24 104.13 103.11
Water Levels and Data over Time
White Mesa Mill -Well TW 4-1
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
z 5,620.77 5,618.58 1.02 111.30
5,519.78 09/23/24 98.80 97.78
-N
0
Depth Below Measuring Point (ft.) ---0
0 0
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0
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0
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0
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0
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0
11/08/99
05/08/01
11/08/02
05/08/04
11/08/05
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05/08/07 ~
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05/08/10 "1
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11/08/11 ~
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05/08/13 ~
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05/08/16 ~ -a
11/08/17 ~
05/08/19
11/08/20
05/08/22
11/08/23
05/08/25
Water Levels and Data over Time
White Mesa Mill-Well TW4-2
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,623.10 5,624.72 1.62 120.900
5,548.57 11/08/99 76.15 74.53
5,548.57 11/09/99 76.15 74.53
5,548.32 01/02/00 76.40 74.78
5,548.52 01/10/00 76.20 74.58
5,548.32 01/17/00 76.40 74.78
5,548.72 01/24/00 76.00 74.38
5,548.62 02/01/00 76.10 74.48
5,548.62 02/07/00 76.10 74.48
5,549.02 02/14/00 75.70 74.08
5,549.12 02/23/00 75.60 73.98
5,549.22 03/01/00 75.50 73.88
5,549.32 03/08/00 75.40 73.78
5,549.22 03/15/00 75.50 73.88
5,549.92 03/20/00 74.80 73.18
5,549.72 03/29/00 75.00 73.38
5,549.42 04/04/00 75.30 73.68
5,549.52 04/13/00 75.20 73.58
5,549.72 04/21/00 75.00 73.38
5,549.82 04/28/00 74.90 73.28
5,549.82 05/01/00 74.90 73.28
5,550.12 05/11/00 74.60 72.98
5,549.82 05/15/00 74.90 73.28
5,550.12 05/25/00 74.60 72.98
5,550.12 06/09/00 74.60 72.98
5,550.22 06/16/00 74.50 72.88
5,550.07 06/26/00 74.65 73.03
5,550.17 07/06/00 74.55 72.93
5,550.17 07/13/00 74.55 72.93
5,550.18 07/18/00 74.54 72.92
5,550.33 07/27/00 74.39 72.77
5,550.38 08/02/00 74.34 72.72
5,550.40 08/09/00 74.32 72.70
5,550.42 08/15/00 74.30 72.68
5,550.54 08/31/00 74.18 72.56
5,550.87 09/08/00 73.85 72.23
5,550.97 09/13/00 73.75 72.13
5,551.04 09/20/00 73.68 72.06
5,545.83 10/05/00 78.89 77.27
5,546.47 11/09/00 78.25 76.63
5,546.88 12/06/00 77.84 76.22
5,552.18 01/26/01 72.54 70.92
5,552.20 02/02/01 72.52 70.90
5,551.10 03/29/01 73.62 72.00
Water Levels and Data over Time
White Mesa Mill -Well TW 4.-2
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,623.10 5,624.72 1.62 120.900
5,551.59 04/30/01 73.13 71.51
5,552.03 05/31/01 72.69 71.07
5,552.33 06/21/01 72.39 70.77
5,552.64 07/10/01 72.08 70.46
5,553.32 08/20/01 71.40 69.78
5,553.73 09/19/01 70.99 69.37
5,553.98 10/02/01 70.74 69.12
5,554.14 11/08/01 70.58 68.96
5,554.79 12/03/01 69.93 68.31
5,554.74 01/03/02 69.98 68.36
5,554.91 02/06/02 69.81 68.19
5,555.15 03/26/02 69.57 67.95
5,555.39 04/09/02 69.33 67.71
5,555.73 05/23/02 68.99 67.37
5,555.79 06/05/02 68.93 67.31
5,555.91 07/08/02 68.81 67.19
5,556.04 08/23/02 68.68 67.06
5,556.25 09/11/02 68.47 66.85
5,556.72 10/23/02 68.00 66.38
5,556.42 11/22/02 68.30 66.68
5,557.01 12/03/02 67.71 66.09
5,557.20 01/09/03 67.52 65.90
5,557.35 02/12/03 67.37 65.75
5,557.83 03/26/03 66.89 65.27
5,557.87 04/02/03 66.85 65.23
5,553.71 05/01/03 71.01 69.39
5,548.98 06/09/03 75.74 74.12
5,548.14 07/07/03 76.58 74.96
5,547.75 08/04/03 76.97 75.35
5,547.22 09/11/03 77.50 75.88
5,547.68 10/02/03 77.04 75.42
5,547.52 11/07/03 77.20 75.58
5,548.29 12/03/03 76.43 74.81
5,554.00 01/15/04 70.72 69.10
5,555.46 02/10/04 69.26 67.64
5,556.90 03/28/04 67.82 66.20
5,557.49 04/12/04 67.23 65.61
5,558.07 05/13/04 66.65 65.03
5,558.19 06/18/04 66.53 64.91
5,559.00 07/28/04 65.72 64.10
5,554.26 08/30/04 70.46 68.84
5,551.97 09/16/04 72.75 71.13
5,549.65 10/11/04 75.07 73.45
Water Levels and Data over Time
White Mesa Mill -Well TW 4-2
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,623.10 5,624.72 1.62 120.900
5,549.89 11/16/04 74.83 73.21
5,550.37 12/22/04 74.35 72.73
5,549.95 01/18/05 74.77 73.15
5,550.09 02/28/05 74.63 73.01
5,550.13 03/15/05 74.59 72.97
5,550.18 04/26/05 74.54 72.92
5,550.32 05/24/05 74.40 72.78
5,550.21 06/30/05 74.51 72.89
5,550.11 07/29/05 74.61 72.99
5,550.33 09/12/05 74.39 72.77
5,550.29 12/07/05 74.43 72.81
5,551.30 03/08/06 73.42 71.80
5,551.42 06/14/06 73.30 71.68
5,550.52 07/18/06 74.20 72.58
5,550.52 11/07/06 74.20 72.58
5,552.89 02/27/07 71.83 70.21
5,552.06 05/02/07 72.66 71.04
5,552.02 08/14/07 72.70 71.08
5,552.20 10/10/07 72.52 70.90
5,554.58 03/26/08 70.14 68.52
5,555.23 06/24/08 69.49 67.87
5,555.29 08/26/08 69.43 67.81
5,555.43 10/14/08 69.29 67.67
5,555.73 03/10/09 68.99 67.37
5,556.25 06/24/09 68.47 66.85
5,555.94 09/10/09 68.78 67.16
5,556.53 12/11/09 68.19 66.57
5,557.87 03/11/10 66.85 65.23
5,557.63 05/11/10 67.09 65.47
5,557.24 09/29/10 67.48 65.86
5,557.00 12/21/10 67.72 66.10
5,557.61 02/28/11 67.11 65.49
5,557.58 06/21/11 67.14 65.52
5,557.46 09/20/11 67.26 65.64
5,557.84 12/21/11 66.88 65.26
5,557.86 03/27/12 66.86 65.24
5,557.87 06/28/12 66.85 65.23
5,557.46 09/27/12 67.26 65.64
5,557.82 12/28/12 66.90 65.28
5,559.39 03/28/13 65.33 63.71
5,559.21 06/27/13 65.51 63.89
5,559.26 09/27/13 65.46 63.84
5,559.27 12/20/13 65.45 63.83
Water Levels and Data over Time
White Mesa Mill -Well TW 4-2
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,623.10 5,624.72 1.62 120.900
5,558.92 03/27/14 65.80 64.18
5,557.99 06/25/14 66.73 65.11
5,557.09 09/25/14 67.63 66.01
5,557.07 12/17/14 67.65 66.03
5,549.93 03/26/15 74.79 73.17
5,551.30 06/22/15 73.42 71.80
5,547.12 09/30/15 77.60 75.98
5,538.34 12/02/15 86.38 84.76
5,542.22 03/30/16 82.50 80.88
5,538.31 06/30/16 86.41 84.79
5,536.70 09/29/16 88.02 86.40
5,540.40 12/21/16 84.32 82.70
5,536.61 03/30/17 88.11 86.49
5,547.16 06/27/17 77.56 75.94
5,522.65 09/28/17 102.07 100.45
5,532.64 11/30/17 92.08 90.46
5,506.94 03/28/18 117.78 116.16
5,521.60 06/22/18 103.12 101.50
5,510.01 09/24/18 114.71 113.09
5,543.01 12/17/18 81.71 80.09
5,522.70 03/25/19 102.02 100.40
5,522.49 06/24/19 102.23 100.61
5,522.29 08/12/19 102.43 100.81
5,515.62 11/18/19 109.10 107.48
5,516.60 02/10/20 108.12 106.5
5,514.51 05/04/20 110.21 108.59
5,522.29 09/21/20 102.43 100.81
5,521.08 12/28/20 103.64 102.02
5,513.42 03/11/21 111.30 109.68
5,513.51 06/24/21 111.21 109.59
5,526.62 08/13/21 98.10 96.48
5,514.01 12/30/21 110.71 109.09
5,513.52 02/10/22 111.20 109.58
5,514.54 06/28/22 110.18 108.56
5,566.52 08/15/22 58.20 56.58
5,525.09 11/17/22 99.63 98.01
5,523.61 03/24/23 101.11 99.49
5,512.26 06/26/23 112.46 110.84
5,527.35 09/25/23 97.37 95.75
5,516.50 11/20/23 108.22 106.6
5,522.26 03/25/24 102.46 100.84
5,516.22 06/26/24 108.50 106.88
5,520.95 09/23/24 103.77 102.15
Water Levels and Data over Time
White Mesa Mill -Well TW 4-3
Total or
Measuring Measured Total
Water Land Point Depth to Depth to
Elevation Surface Elevation Length Of Date Of Water Water
(z) (LSD) (MP) Riser (L) Monitoring {blw.MP) (blw.LSD) Total Depth Of Well
5,631.21 5,632.23 1.02 140.30
5,565.78 11/29/99 66.45 65.43
5,566.93 1/2/00 65.30 64.28
5,567.03 1/10/00 65.20 64.18
5,566.83 1/17/00 65.40 64.38
5,567.13 1/24/00 65.10 64.08
5,567.33 2/1/00 64.90 63.88
5,567.13 2/7/00 65.10 64.08
5,567.43 2/14/00 64.80 63.78
5,567.63 2/23/00 64.60 63.58
5,567.73 3/1/00 64.50 63.48
5,567.83 3/8/00 64.40 63.38
5,567.70 3/15/00 64.53 63.51
5,568.03 3/20/00 64.20 63.18
5,567.93 3/29/00 64.30 63.28
5,567.63 4/4/00 64.60 63.58
5,567.83 4/13/00 64.40 63.38
5,568.03 4/21/00 64.20 63.18
5,568.23 4/28/00 64.00 62.98
5,568.13 5/1/00 64.10 63.08
5,568.53 5/11/00 63.70 62.68
5,568.23 5/15/00 64.00 62.98
5,568.53 5/25/00 63.70 62.68
5,568.61 6/9/00 63.62 62.60
5,568.69 6/16/00 63.54 62.52
5,568.45 6/26/00 63.78 62.76
5,568.61 7/6/00 63.62 62.60
5,568.61 7/6/00 63.62 62.60
5,568.49 7/13/00 63.74 62.72
5,568.55 7/18/00 63.68 62.66
5,568.65 7/27/00 63.58 62.56
5,568.73 8/2/00 63.50 62.48
5,568.77 8/9/00 63.46 62.44
5,568.76 8/16/00 63.47 62.45
5,568.95 8/31/00 63.28 62.26
5,568.49 9/8/00 63.74 62.72
5,568.67 9/13/00 63.56 62.54
5,568.96 9/20/00 63.27 62.25
5,568.93 10/5/00 63.30 62.28
5,569.34 11/9/00 62.89 61.87
5,568.79 12/6/00 63.44 62.42
5,569.11 1/3/01 63.12 62.10
5,569.75 2/9/01 62.48 61.46
5,570.34 3/28/01 61.89 60.87
Water Levels and Data over Time
White Mesa Mill -Well TW 4-3
Total or
Measuring Measured Total
Water Land Point Depth to Depth to
Elevation Surface Elevation Length Of Date Of Water Water
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Total Depth Of Well
5,631.21 5,632.23 1.02 140.30
5,570.61 4/30/01 61.62 60.60
5,570.70 5/31/01 61.53 60.51
5,570.88 6/21/01 61.35 60.33
5,571.02 7/10/01 61.21 60.19
5,571.70 8/20/01 60.53 59.51
5,572.12 9/19/01 60.11 59.09
5,572.08 10/2/01 60.15 59.13
5,572.78 11/8/01 59.45 58.43
5,573.27 12/3/01 58.96 57.94
5,573.47 1/3/02 58.76 57.74
5,573.93 2/6/02 58.30 57.28
5,574.75 3/26/02 57.48 56.46
5,574.26 4/9/02 57.97 56.95
5,575.39 5/23/02 56.84 55.82
5,574.84 6/5/02 57.39 56.37
5,575.33 7/8/02 56.90 55.88
5,575.79 8/23/02 56.44 55.42
5,576.08 9/11/02 56.15 55.13
5,576.30 10/23/02 55.93 54.91
5,576.35 11/22/02 55.88 54.86
5,576.54 12/3/02 55.69 54.67
5,576.96 1/9/03 55.27 54.25
5,577.11 2/12/03 55.12 54.10
5,577.61 3/26/03 54.62 53.60
5,572.80 4/2/03 59.43 58.41
5,577.89 5/1/03 54.34 53.32
5,577.91 6/9/03 54.32 53.30
5,577.53 7/7/03 54.70 53.68
5,577.50 8/4/03 54.73 53.71
5,577.71 9/11/03 54.52 53.50
5,577.31 10/2/03 54.92 53.90
5,577.33 11/7/03 54.90 53.88
5,577.34 12/3/03 54.89 53.87
5,578.24 1/15/04 53.99 52.97
5,578.38 2/10/04 53.85 52.83
5,578.69 3/28/04 53.54 52.52
5,579.15 4/12/04 53.08 52.06
5,579.47 5/13/04 52.76 51.74
5,579.53 6/18/04 52.70 51.68
5,580.17 7/28/04 52.06 51.04
5,580.20 8/30/04 52.03 51.01
5,580.26 9/16/04 51.97 50.95
5,580.12 10/11/04 52.11 51.09
Water Levels and Data over Time
White Mesa Mill -Well TW 4-3
Total or
Measuring Measured Total
Water Land Point Depth to Depth to
Elevation Surface Elevation Length Of Date Of Water Water
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Total Depth Of Well
5,631.21 5,632.23 1.02 140.30
5,579.93 11/16/04 52.30 51.28
5,580.07 12/22/04 52.16 51.14
5,579.80 1/18/05 52.43 51.41
5,580.35 2/28/05 51.88 50.86
5,580.57 3/15/05 51.66 50.64
5,580.86 4/26/05 51.37 50.35
5,581.20 5/24/05 51.03 50.01
5,581.51 6/30/05 50.72 49.70
5,581.55 7/29/05 50.68 49.66
5,581.68 9/12/05 50.55 49.53
5,581.83 12/7/05 50.40 49.38
5,564.92 3/8/06 67.31 66.29
5,582.73 6/13/06 49.50 48.48
5,582.33 7/18/06 49.90 48.88
5,582.75 11/7/06 49.48 48.46
5,583.35 2/27/07 48.88 47.86
5,559.57 5/2/07 72.66 71.64
5,583.29 8/14/07 48.94 47.92
5,583.49 10/10/07 48.74 47.72
5,584.95 3/26/08 47.28 46.26
5,584.59 6/24/08 47.64 46.62
5,584.55 8/26/08 47.68 46.66
5,584.03 10/14/08 48.20 47.18
5,583.64 3/3/09 48.59 47.57
5,587.34 6/24/09 44.89 43.87
5,582.90 9/10/09 49.33 48.31
5,583.27 12/11/09 48.96 47.94
5,583.63 3/11/10 48.60 47.58
5,583.82 5/11/10 48.41 47.39
5,583.51 9/29/10 48.72 47.70
5,582.86 12/21/10 49.37 48.35
5,582.60 2/28/11 49.63 48.61
5,590.00 6/21/11 42.23 41.21
5,582.70 9/20/11 49.53 48.51
5,583.05 12/21/11 49.18 48.16
5,581.93 3/27/12 50.30 49.28
5,582.03 6/28/12 50.20 49.18
5,582.08 9/27/12 50.15 49.13
5,581.94 12/28/12 50.29 49.27
5,581.52 3/28/13 50.71 49.69
5,580.88 6/27/13 51.35 50.33
5,580.58 9/27/13 51.65 50.63
5,580.38 12/20/13 51.85 50.83
Water Levels and Data over Time
White Mesa Mill -Well TW 4-3
Total or
Measuring Measured Total
Water Land Point Depth to Depth to
Elevation Surface Elevation Length Of Date Of Water Water
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Total Depth Of Well
5,631.21 5,632.23 1.02 140.30
5,579.62 3/27/14 52.61 51.59
5,578.52 6/25/14 53.71 52.69
5,577.59 9/25/14 54.64 53.62
5,577.40 12/17/14 54.83 53.81
5,576.73 3/26/15 55.50 54.48
5,576.62 6/22/15 55.61 54.59
5,576.16 9/30/15 56.07 55.05
5,575.57 12/2/15 56.66 55.64
5,575.62 3/30/16 56.61 55.59
5,574.89 6/30/16 57.34 56.32
5,574.37 9/29/16 57.86 56.84
5,574.23 12/21/16 58.00 56.98
5,574.23 3/30/17 58.00 56.98
5,573.72 6/27/17 58.51 57.49
5,573.28 9/28/17 58.95 57.93
5,572.66 11/30/17 59.57 58.55
5,572.19 3/28/18 60.04 59.02
5,571.83 6/22/18 60.40 59.38
5,571.34 9/25/18 60.89 59.87
5,570.99 12/17/18 61.24 60.22
5,570.21 3/25/19 62.02 61.00
5,570.28 6/24/19 61.95 60.93
5,570.04 8/12/19 62.19 61.17
5,569.68 11/18/19 62.55 61.53
5,569.35 2/10/20 62.88 61.86
5,568.92 5/4/20 63.31 62.29
5,568.38 9/22/20 63.85 62.83
5,568.28 12/30/20 63.95 62.93
5,568.31 3/11/21 63.92 62.90
5,567.65 6/24/21 64.58 63.56
5,567.61 8/13/21 64.62 63.60
5,567.72 12/30/21 64.51 63.49
5,567.15 2/10/22 65.08 64.06
5,567.57 6/28/22 64.66 63.64
5,566.83 8/15/22 65.40 64.38
5,566.63 11/17/22 65.60 64.58
5,566.89 3/24/23 65.34 64.32
5,566.44 6/26/23 65.79 64.77
5,566.20 9/28/23 66.03 65.01
5,566.32 11/20/23 65.91 64.89
5,565.81 3/26/24 66.42 65.40
5,565.60 6/26/24 66.63 65.61
5,565.46 9/23/24 66.77 65.75
Water Levels and Data over Time
White Mesa Mill-Well TW4-4
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP~ Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,612.301 5 613.485 1.184 114.5
5,512.15 05 /25 /00 101.34 100.16
5,518.99 06/09/00 94.50 93.32
5,512.15 06/16/00 101.34 100.16
5,517.47 06/26/00 96.02 94.84
5,520.15 07/06/00 93.34 92.16
5,521.44 07/13/00 92.05 90.87
5,522.01 07/18/00 91.48 90.30
5,522.95 07/27/00 90.54 89.36
5,523.49 08/02/00 90.00 88.82
5,523.85 08/09/00 89.64 88.46
5,523.89 08/15/00 89 .60 88.42
5,524.56 09/01/00 88.93 87.75
5,513.24 09/08/00 100.25 99.07
5,516.67 09/13/00 96.82 95.64
5,519.09 09/20/00 94.40 93.22
5,522.17 10/05/00 91.32 90.14
5,524.67 11/09/00 88.82 87.64
5,518.55 12/06/00 94.94 93.76
5,527.70 01/03/01 85.79 84.61
5,529.09 02/09/01 84.40 83.22
5,529.54 03/27/01 83.95 82.77
5,530.24 04/30/01 83.25 82.07
5,530.27 05/31/01 83.22 82.04
5,534.41 06/22/01 79.08 77.90
5,533.15 07/10/01 80.34 79.16
5,534.04 08/20/01 79.45 78.27
5,534.47 09/19/01 79.02 77.84
5,533.29 10/02/01 80.20 79.02
5,533.87 11/08/01 79.62 78.44
5,534.28 12/03/01 79.21 78.03
5,534.72 01/03/02 78.77 77.59
5,535.44 02/06/02 78.05 76.87
5,536.45 03/26/02 77.04 75.86
5,536.41 04/09/02 77.08 75.90
5,537.34 05/23/02 76.15 74.97
5,537.33 06/05/02 76.16 74.98
5,537.98 07/08/02 75.51 74.33
5,538.83 08/23/02 74.66 73.48
5,539.28 09/11/02 74.21 73.03
5,539.77 10/23/02 73.72 72.54
5,540.21 11/22/02 73.28 72.10
5,540.30 12/03/02 73.19 72.01
5,540.80 01/09/03 72.69 71.51
Water Levels and Data over Time
White Mesa Mill -Well TW 4-4
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,612.301 5,613.485 1.184 114.5
5,540.99 02/12/03 72.50 71.32
5,541.68 03/26/03 71.81 70.63
5,541.77 04/02/03 71.72 70.54
5,541.89 05/01/03 71.60 70.42
5,542.03 06/09/03 71.46 70.28
5,541.93 07/07/03 71.56 70.38
5,541.89 08/04/03 71.60 70.42
5,541.83 09/11/03 71.66 70.48
5,541.89 10/02/03 71.60 70.42
5,542.00 11/07/03 71.49 70.31
5,542.01 12/03/03 71.48 70.30
5,542.56 01/15/04 70.93 69.75
5,542.71 02/10/04 70.78 69.60
5,543.23 03/28/04 70.26 69.08
5,543.56 04/12/04 69.93 68.75
5,543.87 05/13/04 69.62 68.44
5,543.92 06/18/04 69.57 68.39
5,544.66 07/28/04 68.83 67.65
5,544.80 08/30/04 68.69 67.51
5,544.85 09/16/04 68.64 67.46
5,544.71 10/11/04 68.78 67.60
5,544.53 11/16/04 68.96 67.78
5,544.63 12/22/04 68.86 67.68
5,544.31 01/18/05 69.18 68.00
5,544.59 02/28/05 68.90 67.72
5,544.69 03/15/05 68.80 67.62
5,544.68 04/26/05 68.81 67.63
5,544.79 05/24/05 68.70 67.52
5,544.80 06/30/05 68.69 67.51
5,544.78 07/29/05 68.71 67.53
5,545.01 09/12/05 68.48 67.30
5,545.23 12/07/05 68.26 67.08
5,545.74 03/08/06 67.75 66.57
5,545.79 06/14/06 67.70 66.52
5,545.86 07/18/06 67.63 66.45
5,545.81 11/07/06 67.68 66.50
5,546.68 02/27/07 66.81 65.63
5,546.54 05/02/07 66.95 65.77
5,547.16 08/15/07 66.33 65.15
5,547.22 10/10/07 66.27 65.09
5,548.31 03/26/08 65.18 64.00
5,548.87 06/24/08 64.62 63.44
5,549.24 08/26/08 64.25 63.07
Water Levels and Data over Time
White Mesa Mill -Well TW 4-4
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,612.301 5,613.485 1.184 114.5
5,549.31 10/14/08 64.18 63.00
5,549.73 03/03/09 63.76 62.58
5,549.91 06/24/09 63.58 62.40
5,549.70 09/10/09 63.79 62.61
5,549.87 12/11/09 63.62 62.44
5,545.60 03/11/10 67.89 66.71
5,530.88 05/11/10 82.61 81.43
5,545.24 09/29/10 68.25 67.07
5,533.66 12/21/10 79.83 78.65
5,544.44 02/28/11 69.05 67.87
5,543.73 06/21/11 69.76 68.58
5,540.48 09/20/11 73.01 71.83
5,544.36 12/21/11 69.13 67.95
5,543.48 03/27/12 70.01 68.83
5,543.49 06/28/12 70.00 68.82
5,543.36 09/27/12 70.13 68.95
5,543.51 12/28/12 69.98 68.80
5,543.49 03/28/13 70.00 68.82
5,543.36 06/27/13 70.13 68.95
5,544.59 09/27/13 68.90 67.72
5,543.33 12/20/13 70.16 68.98
5,544.11 03/27/14 69.38 68.20
5,543.61 06/25/14 69.88 68.70
5,543.67 09/25/14 69.82 68.64
5,543.69 12/17/14 69.80 68.62
5,541.49 03/26/15 72.00 70.82
5,539.67 06/22/15 73.82 72.64
5,541.35 09/30/15 72.14 70.96
5,541.63 12/02/15 71.86 70.68
5,540.38 03/30/16 73.11 71.93
5,539.46 06/30/16 74.03 72.85
5,540.39 09/29/16 73.10 71.92
5,539.21 12/21/16 74.28 73.10
5,539.53 03/30/17 73.96 72.78
5,539.89 06/27/17 73.60 72.42
5,540.09 09/28/17 73.40 72.22
5,539.07 11/30/17 74.42 73.24
5,540.45 03/28/18 73.04 71.86
5,531.79 06/22/18 81.70 80.52
5,531.94 09/24/18 81.55 80.37
5,540.22 12/17/18 73.27 72.09
5,514.10 03/25/19 99.39 98.21
5,529.11 06/24/19 84.38 83.20
Water Levels and Data over Time
White Mesa Mill -Well TW 4-4
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,612.301 5,613.485 1.184 114.5
5,527.15 08/12/19 86.34 85.16
5,528.08 11/18/19 85.41 84.23
5,534.40 02/10/20 79.09 77.91
5,533.16 05/04/20 80.33 79.15
5,539.39 09/21/20 74.10 72.92
5,536.54 12/28/20 76.95 75.77
5,533.98 03/11/21 79.51 78.33
5,528.14 06/24/21 85.35 84.17
5,532.43 08/13/21 81.06 79.88
5,530.32 12/30/21 83.17 81.99
5,539.46 02/10/22 74.03 72.85
5,529.37 06/28/22 84.12 82.94
5,524.97 08/15/22 88.52 87.34
5,530.93 11/17/22 82.56 81.38
5,532.43 03/24/23 81.06 79.88
5,529.32 06/26/23 84.17 82.99
5,525.34 09/25/23 88.15 86.97
5,528.25 11/20/23 85.24 84.06
5,528.03 03/25/24 85.46 84.28
5,527.58 06/26/24 85.91 84.73
5,524.26 09/23/24 89.23 88.05
Water Levels and Data over Time
White Mesa Mill -Well TW 4-5
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,638.75 5,640.70 1.95 121.85
5,583.28 09/19/01 57.42 55.47
5,583.36 10/02/01 57.34 55.39
5,583.49 11/08/01 57.21 55.26
5,583.84 12/03/01 56.86 54.91
5,583.79 01/03/02 56.91 54.96
5,583.96 02/06/02 56.74 54.79
5,584.39 03/26/02 56.31 54.36
5,584.12 04/09/02 56.58 54.63
5,584.55 05/23/02 56.15 54.20
5,584.42 06/05/02 56.28 54.33
5,583.65 07/08/02 57.05 55.10
5,584.90 08/23/02 55.80 53.85
5,585.02 09/11/02 55.68 53.73
5,585.20 10/23/02 55.50 53.55
5,585.15 11/22/02 55.55 53.60
5,585.42 12/03/02 55.28 53.33
5,585.65 01/09/03 55.05 53.10
5,585.65 02/12/03 55.05 53.10
5,585.92 03/26/03 54.78 52.83
5,586.22 04/02/03 54.48 52.53
5,586.01 05/01/03 54.69 52.74
5,584.81 06/09/03 55.89 53.94
5,584.34 07/07/03 56.36 54.41
5,584.40 08/04/03 56.30 54.35
5,583.88 09/11/03 56.82 54.87
5,583.57 10/02/03 57.13 55.18
5,583.39 11/07/03 57.31 55.36
5,583.97 12/03/03 56.73 54.78
5,585.28 01/15/04 55.42 53.47
5,585.50 02/10/04 55.20 53.25
5,585.87 03/28/04 54.83 52.88
5,586.20 04/12/04 54.50 52.55
5,586.45 05/13/04 54.25 52.30
5,586.50 06/18/04 54.20 52.25
5,587.13 07/28/04 53.57 51.62
5,586.22 08/30/04 54.48 52.53
5,585.69 09/16/04 55.01 53.06
5,585.17 10/11/04 55.53 53.58
5,584.64 11/16/04 56.06 54.11
5,584.77 12/22/04 55.93 53.98
5,584.65 01/18/05 56.05 54.10
5,584.98 02/28/05 55.72 53.77
5,585.15 03/15/05 55.55 53.60
5,586.25 04/26/05 54.45 52.50
5,586.79 05/24/05 53.91 51.96
5,586.52 06/30/05 54.18 52.23
Water Levels and Data over Time
White Mesa Mill -Well TW 4-5
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,638.75 5,640.70 1.95 121.85
5,586.03 07/29/05 54.67 52.72
5,586.05 09/12/05 54.65 52.70
5,585.80 12/07/05 54.90 52.95
5,587.06 03/08/06 53.64 51.69
5,585.90 06/13/06 54.80 52.85
5,585.32 07/18/06 55.38 53.43
5,585.35 11/07/06 55.35 53.40
5,585.81 02/27/07 54.89 52.94
5,585.20 05/02/07 55.50 53.55
5,586.66 08/14/07 54.04 52.09
5,586.80 10/10/07 53.90 51.95
5,588.48 03/26/08 52.22 50.27
5,586.51 06/24/08 54.19 52.24
5,586.45 08/26/08 54.25 52.30
5,585.40 10/14/08 55.30 53.35
5,584.80 03/03/09 55.90 53.95
5,584.73 06/24/09 55.97 54.02
5,584.36 09/10/09 56.34 54.39
5,585.02 12/11/09 55.68 53.73
5,585.66 03/11/10 55.04 53.09
5,584.86 05/11/10 55.84 53.89
5,584.55 09/29/10 56.15 54.20
5,584.17 12/21/10 56.53 54.58
5,583.55 02/28/11 57.15 55.20
5,584.72 06/21/11 55.98 54.03
5,584.62 09/20/11 56.08 54.13
5,585.04 11/21/11 55.66 53.71
5,583.89 03/27/12 56.81 54.86
5,583.92 06/28/12 56.78 54.83
5,583.89 09/27/12 56.81 54.86
5,583.89 12/28/12 56.81 54.86
5,582.88 03/28/13 57.82 55.87
5,582.05 06/27/13 58.65 56.70
5,581.35 09/27/13 59.35 57.40
5,580.52 12/20/13 60.18 58.23
5,579.44 03/27/14 61.26 59.31
5,578.11 06/25/14 62.59 60.64
5,577.15 09/25/14 63.55 61.60
5,577.44 12/17/14 63.26 61.31
5,577.37 03/26/15 63.33 61.38
5,577.46 06/22/15 63.24 61.29
5,576.92 09/30/15 63.78 61.83
5,576.33 12/02/15 64.37 62.42
5,576.30 03/30/16 64.40 62.45
5,575.72 06/30/16 64.98 63.03
5,575.12 09/29/16 65.58 63.63
Water Levels and Data over Time
White Mesa Mill -Well TW 4-5
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(z) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,638.75 5,640.70 1.95 121.85
5,574.77 12/21/16 65.93 63.98
5,575.03 03/30/17 65.67 63.72
5,574.55 06/27/17 66.15 64.20
5,574.09 09/28/17 66.61 64.66
5,573.48 11/30/17 67.22 65.27
5,573.05 03/28/18 67.65 65.70
5,572.68 06/22/18 68.02 66.07
5,571.89 09/24/18 68.81 66.86
5,571.86 12/17/18 68.84 66.89
5,571.15 03/25/19 69.55 67.60
5,571.26 06/24/19 69.44 67.49
5,571.12 08/12/19 69.58 67.63
5,570.73 11/18/19 69.97 68.02
5,570.50 02/10/20 70.20 68.25
5,570.15 05/04/20 70.55 68.60
5,569.36 09/22/20 71.34 69.39
5,569.17 12/30/20 71.53 69.58
5,569.24 03/11/21 71.46 69.51
5,568.71 06/24/21 71.99 70.04
5,568.68 08/13/21 72.02 70.07
5,568.99 12/30/21 71.71 69.76
5,568.23 02/10/22 72.47 70.52
5,568.73 06/28/22 71.97 70.02
5,568.04 08/15/22 72.66 70.71
5,567.85 11/17/22 72.85 70.9
5,567.40 03/24/23 73.30 71.35
5,567.39 06/26/23 73.31 71.36
5,567.32 09/28/23 73.38 71.43
5,567.05 11/20/23 73.65 71.7
5,566.90 03/26/24 73.80 71.85
5,566.46 06/26/24 74.24 72.29
5,566.53 09/23/24 74.17 72.22
00
0
--.J
Ul
Depth Below Measuring Point (ft.)
--.J
0
O'\
Ul
O'\
0
Ul Ul
Ul 0
01/02/00
01/02/01
01/02/02
01/02/03
01/02/04
01/02/05
01/02/06
01/02/07 ~
~
01/02/08
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I
UI
01/02/09 ~ -tD
01/02/10 "'Ii
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01/02/11 "'O -=-
01/02/12 0 -< tD
01/02/13 "'Ii
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01/02/14 9
tD -01/02/15 ~
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01/02/16 -9
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01/02/17 -
01/02/18
01/02/19
01/02/20
01/02/21
01/02/22
01/02/23
01/02/24
01/02/25
Water Levels and Data over Time
White Mesa Mill -Well TW 4-6
Measuring Total or Total Water Land Measured Total
Elevation Surface Point Length Of Date Of Depth to Depth to Depth Of
(z) (LSD) Elevation Riser (L) Monitoring Water Water Well
(MP) (blw.MPl (blw.LSD) (blw.LSD)
5,607.33 5,608.78 1.450 99.60
5,522.28 05/25/00 86.50 85.05
5,521.51 06/09/00 87.27 85.82
5,522.35 06/16/00 86.43 84.98
5,522.14 06/26/00 86.64 85.19
5,522.25 07/06/00 86.53 85.08
5,522.13 07/13/00 86.65 85.20
5,522.17 07/18/00 86.61 85.16
5,522.26 07/25/00 86.52 85.07
5,522.31 08/02/00 86.47 85.02
5,522.33 08/09/00 86.45 85.00
5,522.35 08/15/00 86.43 84.98
5,522.40 08/31/00 86.38 84.93
5,522.40 09/08/00 86.38 84.93
5,522.45 09/13/00 86.33 84.88
5,522.53 09/20/00 86.25 84.80
5,522.39 10/05/00 86.39 84.94
5,522.42 11/09/00 86.36 84.91
5,522.29 12/06/00 86.49 85.04
5,522.63 01/03/01 86.15 84.70
5,522.72 02/09/01 86.06 84.61
5,522.90 03/26/01 85.88 84.43
5,522.70 04/30/01 86.08 84.63
5,522.89 05/31/01 85.89 84.44
5,522.88 06/20/01 85.90 84.45
5,522.96 07/10/01 85.82 84.37
5,523.10 08/20/01 85.68 84.23
5,523.23 09/19/01 85.55 84.10
5,523.21 10/02/01 85.57 84.12
5,523.25 11/08/01 85.53 84.08
5,523.46 12/03/01 85.32 83.87
5,523.36 01/03/02 85.42 83.97
5,523.50 02/06/02 85.28 83.83
5,523.94 03/26/02 84.84 83.39
5,523.75 04/09/02 85.03 83.58
5,524.23 05/23/02 84.55 83.10
5,523.98 06/05/02 84.80 83.35
5,524.31 07/08/02 84.47 83.02
5,524.36 08/23/02 84.42 82.97
5,524.49 09/11/02 84.29 82.84
5,524.71 10/23/02 84.07 82.62
5,524.60 11/22/02 84.18 82.73
5,524.94 12/03/02 83.84 82.39
5,525.10 01/09/03 83.68 82.23
5,525.15 02/12/03 83.63 82.18
5,525.35 03/26/03 83.43 81.98
5,525.68 04/02/03 83.10 81.65
Water Levels and Data over Time
White Mesa Mill -Well TW 4-6
Measuring Total or Total Water Land Measured Total
Elevation Surface Point Length Of Date Of Depth to Depth to Depth Of
(z) (LSD) Elevation Riser (L) Monitoring Water Water Well
{MP) (blw.MP} (blw.LSD) (blw.LSD)
5,607.33 5,608.78 1.450 99.60
5,525.74 05/01/03 83.04 81.59
5,525.98 06/09/03 82.80 81.35
5,526.04 07/07/03 82.74 81.29
5,526.07 08/04/03 82.71 81.26
5,526.42 09/11/03 82.36 80.91
5,526.30 10/02/03 82.48 81.03
5,526.41 11/07/03 82.37 80.92
5,526.46 12/03/03 82.32 80.87
5,526.83 01/15/04 81.95 . 80.50
5,526.81 02/10/04 81.97 80.52
5,527.14 03/28/04 81.64 80.19
5,527.39 04/12/04 81.39 79.94
5,527.64 05/13/04 81.14 79.69
5,527.70 06/18/04 81.08 79.63
5,528.16 07/28/04 80.62 79.17
5,528.30 08/30/04 80.48 79.03
5,528.52 09/16/04 80.26 78.81
5,528.71 10/11/04 80.07 78.62
5,528.74 11/16/04 80.04 78.59
5,529.20 12/22/04 79.58 78.13
5,528.92 01/18/05 79.86 78.41
5,529.51 02/28/05 79.27 77.82
5,529.74 03/15/05 79.04 77.59
5,529.96 04/26/05 78.82 77.37
5,530.15 05/24/05 78.63 77.18
5,530.35 06/30/05 78.43 76.98
5,530.47 07/29/05 78.31 76.86
5,530.95 09/12/05 77.83 76.38
5,531.50 12/07/05 77.28 75.83
5,532.43 03/08/06 76.35 74.90
5,533.49 06/13/06 75.29 73.84
5,532.58 07/18/06 76.20 74.75
5,532.88 11/07/06 75.90 74.45
5534.09 02/27/07 74.69 73.24
5,534.04 05/02/07 74.74 73.29
5,534.43 08/14/07 74.35 72.90
5,554.54 10/10/07 54.24 52.79
5,535.40 03/26/08 73.38 71.93
5,535.55 06/24/08 73.23 71.78
5,535.90 08/26/08 72.88 71.43
5,535.87 10/14/08 72.91 71.46
5,536.42 03/10/09 72.36 70.91
5,536.71 06/24/09 72.07 70.62
5,536.83 09/10/09 71.95 70.50
5,537.35 12/11/09 71.43 69.98
5,537.93 03/11/10 70.85 69.40
Water Levels and Data over Time
White Mesa Mill -Well TW 4-6
Measuring Total or Total Water Land Measured Total
Elevation Surface Point Length Of Date Of Depth to Depth to Depth Of
(z) (LSD) Elevation Riser (L) Monitoring Water Water Well
(MP) (blw.MP) (blw.LSD) (blw.LSD)
5,607.33 5,608.78 1.450 99.60
5,538.14 05/11/10 70.64 69.19
5,538.03 09/29/10 70.75 69.30
5,538.04 12/21/10 70.74 69.29
5,537.98 02/28/11 70.80 69.35
5,538.46 06/21/11 70.32 68.87
5,538.37 09/20/11 70.41 68.96
5,538.87 12/21/11 69.91 68.46
5,538.73 03/27/12 70.05 68.60
5,538.80 06/28/12 69.98 68.53
5,539.04 09/27/12 69.74 68.29
5,538.74 12/28/12 70.04 68.59
5,539.53 03/28/13 69 .25 67 .80
5,539.46 06/27/13 69.32 67.87
5,539.62 09/27/13 69.16 67.71
5,539.85 12/20/13 68.93 67.48
5,539.65 03/27/14 69.13 67.68
5,538.85 06/25/14 69.93 68.48
5,538.69 09/25/14 70.09 68.64
5,538.71 12/17/14 70.07 68.62
5,538.03 03/26/15 70.75 69.30
5,537.78 06/22/15 71.00 69.55
5,537.40 09/30/15 71.38 69.93
5,537.44 12/02/15 71.34 69 .89
5,536.76 03/30/16 72.02 70.57
5,536.08 06/30/16 72.70 71.25
5,535.54 09/29/16 73.24 71.79
5,535.38 12/21/16 73.40 71.95
5,535.48 03/30/17 73.30 71.85
5,535.13 06/27/17 73.65 72.20
5,534.78 09/28/17 74.00 72.55
5,534.54 11/30/17 74.24 72.79
5,534.38 03/28/18 74.40 72.95
5,533.92 06/22/18 74.86 73.41
5,533.49 09/25/18 75.29 73.84
5,533.17 12/17/18 75.61 74.16
5,532.63 03/25/19 76.15 74.70
5,532.56 06/24/19 76.22 74.77
5,532.28 08/12/19 76.50 75.05
5,531.69 11/18/19 77.09 75.64
5,531.34 02/10/20 77.44 75.99
5,530.76 05/04/20 78.02 76.57
5,530.36 09/22/20 78.42 76.97
5,530.29 12/30/20 78.49 77.04
5,530.20 03/11/21 78.58 77.13
5,529.69 06/24/21 79.09 77.64
5,529.67 08/13/21 79.11 77.66
Water Levels and Data over Time
White Mesa Mill -Well TW 4-6
Measuring Total or Total Water Land Measured Total
Elevation Surface Point Length Of Date Of Depth to Depth to Depth Of
(z) (LSD) Elevation Riser (L) Monitoring Water Water Well
(MP). (blw.MP} (blw.LSD) (blw.LSD)
5,607.33 5,608.78 1.450 99.60
5,529.78 12/30/21 79.00 77.55
5,529.23 02/10/22 79.55 78.10
5,529.65 06/28/22 79.13 77.68
5,528.84 08/15/22 79.94 78.49
5,528.58 11/17/22 80.20 78.75
5,528.28 03/24/23 80.50 79.05
5,528.43 06/26/23 80.35 78.90
5,528.20 09/28/23 80.58 79.13
5,528.35 11/20/23 80.43 78.98
5,527.78 03/26/24 81.00 79.55
5,527.55 06/26/24 81.23 79.78
5,527.51 09/23/24 81.27 79.82
Water Levels and Data over Time
White Mesa Mill -Well TW4-7
Measuring Total or Total Water Land Measured Total Depth
Elevation Surface Point Length or Date Of Depth to Depth to Of Well
(WL) (LSD) Elevation Riser (L) Monitoring Water Water (blw.LSD) (MP) !blw.MP} (blw.LSD)
5,619.87 5,621.07 1.20 121.0
5,552.37 11/29/99 68.70 67.50
5,553.57 01/02/00 67.50 66.30
5,553.87 01/10/00 67.20 66.00
5,553.72 01/17 /00 67.35 66.15
5,553.97 01/24/00 67.10 65.90
5,553.87 02/01/00 67.20 66.00
5,553.87 02/07/00 67.20 66.00
5,554.17 02/14/00 66.90 65.70
5,554.27 02/23/00 66.80 65.60
5,554.37 03/01/00 66.70 65.50
5,554.37 03/08/00 66.70 65.50
5,554.27 03/15/00 66.80 65.60
5,554.77 03/20/00 66.30 65.10
5,554.57 03/29/00 66.50 65.30
5,554.27 04/04/00 66.80 65.60
5,554.57 04/13/00 66.50 65.30
5,554.77 04/21/00 66.30 65.10
5,554.87 04/28/00 66.20 65.00
5,554.87 05/01/00 66.20 65.00
5,555.27 05/11/00 65.80 64.60
5,554.97 05/15/00 66.10 64.90
5,555.27 05/25/00 65.80 64.60
5,555.33 06/09/00 65.74 64.54
5,555.45 06/16/00 65.62 64.42
5,555.22 06/26/00 65.85 64.65
5,555.45 07/06/00 65.62 64.42
5,555.40 07/13/00 65.67 64.47
5,555.45 07/18/00 65.62 64.42
5,555.59 07/27/00 65.48 64.28
5,555.65 08/02/00 65.42 64.22
5,555.70 08/09/00 65.37 64.17
5,555.74 08/16/00 65.33 64.13
5,555.96 08/31/00 65.11 63.91
5,555.87 09/08/00 65.20 64.00
5,555.95 09/13/00 65.12 63.92
5,556.05 09/20/00 65.02 63.82
5,556.06 10/05/00 65.01 63.81
5,556.17 10/12/00 64.90 63.70
5,556.20 10/19/00 64.87 63.67
5,556.22 10/23/00 64.85 63.65
5,556.36 11/09/00 64.71 63.51
5,556.42 11/14/00 64.65 63.45
5,556.45 11/30/00 64.62 63.42
5,556.15 12/06/00 64.92 63.72
Water Levels and Data over Time
White Mesa Mill -Well TW4-7
Measuring Total or Total Water Land Measured Total Depth
Elevation Surface Point Length Of Date Of Depth to Depth to Of Well
(WL) (LSD) E levation Riser (L) Monitoring Water Water (blw.LSD) (MP) {blw.MP)
(blw.LSD)
5,619.87 5,621.07 1.20 121.0
5,556.89 01/14/01 64.18 62.98
5,557.07 02/09/01 64.00 62.80
5,557.62 03/29/01 63.45 62.25
5,557.51 04/30/01 63.56 62.36
5,557.77 05/31/01 63.30 62.10
5,557.84 06/21/01 63.23 62.03
5,557.98 07/10/01 63.09 61.89
5,558.33 08/20/01 62.74 61.54
5,558.57 09/19/01 62.50 61.30
5,558.53 10/02/01 62.54 61.34
5,558.62 11/08/01 62.45 61.25
5,559.03 12/03/01 62.04 60.84
5,559.08 01/03/02 61.99 60.79
5,559.32 02/06/02 61.75 60.55
5,559.63 03/26/02 61.44 60.24
5,559.55 04/09/02 61.52 60.32
5,560.06 05/23/02 61.01 59.81
5,559.91 06/05/02 61.16 59.96
5,560.09 07/08/02 60.98 59.78
5,560.01 08/23/02 61.06 59.86
5,560.23 09/11/02 60.84 59.64
5,560.43 10/23/02 60.64 59.44
5,560.39 11/22/02 60.68 59.48
5,560.61 12/03/02 60.46 59.26
5,560.89 01/09/03 60.18 58.98
5,560.94 02/12/03 60.13 58.93
5,561.28 03/26/03 59.79 58.59
5,561.35 04/02/03 59.72 58.52
5,546.20 05/01/03 74.87 73.67
5,539.47 06/09/03 81.60 80.40
5,541.87 07/07/03 79.20 78.00
5,542.12 08/04/03 78.95 77.75
5,541.91 09/11/03 79.16 77.96
5,544.62 10/02/03 76.45 75.25
5,542.67 11/07/03 78.40 77.20
5,549.96 12/03/03 71.11 69.91
5,557.17 01/15/04 63.90 62.70
5,558.65 02/10/04 62.42 61.22
5,559.90 03/28/04 61.17 59.97
5,560.36 04/12/04 60.71 59.51
5,560.87 05/13/04 60.20 59.00
5,560.95 06/18/04 60.12 58.92
5,561.64 07/28/04 59.43 58.23
5,543.00 08/30/04 78.07 76.87
Water Levels and Data over Time
White Mesa Mill -Well TW4-7
Meas uring Total or Total Water Land Measured Total Depth
Elevation Surface Poin t Length Or Date or Depth to Depth to Of Well
(WL) (LSD) Elevation Ri ser (L) Mo nitorin g Water Water (blw.LSD) (MP) {blw.MP}
(blw.LSD)
5,619.87 5,621.07 1.20 121.0
5,541.91 09/16/04 79.16 77.96
5,540.08 10/11/04 80.99 79.79
5,546.92 11/16/04 74.15 72.95
5,546.97 12/22/04 74.10 72.90
5,546.51 01/18/05 74.56 73.36
5,546.66 02/28/05 74.41 73.21
5,546.81 03/15/05 74.26 73.06
5,548.19 04/26/05 72.88 71.68
5,547.11 05/24/05 73.96 72.76
5,546.98 06/30/05 74.09 72.89
5,546.92 07/29/05 74.15 72.95
5,547.26 09/12/05 73.81 72.61
5,547.26 12/07/05 73.81 72.61
5,548.86 03/08/06 72.21 71.01
5,548.62 06/13/06 72.45 71.25
5,550.04 07/18/06 71.03 69.83
5,548.32 11/07/06 72.75 71.55
5,550.44 02/27/07 70.63 69.43
5,549.69 05/02/07 71.38 70.18
5,549.97 08/14/07 71.10 69.90
5,550.30 10/10/07 70.77 69.57
5,551.92 03/26/08 69.15 67.95
5,552.94 06/24/08 68.13 66.93
5,552.34 08/26/08 68.73 67.53
5,552.61 10/14/08 68.46 67.26
5,552.81 03/10/09 68.26 67.06
5,553.11 06/24/09 67.96 66.76
5,552.55 09/10/09 68.52 67.32
5,553.06 12/11/09 68.01 66.81
5,554.64 03/11/10 66.43 65.23
5,554.20 05/11/10 66.87 65.67
5,553.45 09/29/10 67.62 66.42
5,553.40 12/21/10 67.67 66.47
5,553.93 02/28/11 67.14 65.94
5,553.67 06/21/11 67.4 66.20
5,553.46 09/20/11 67.61 66.41
5,553.78 12/21/11 67.29 66.09
5,553.17 03/27/12 67.90 66.70
5,553.21 06/28/12 67.86 66.66
5,552.90 09/27/12 68.17 66.97
5,553.15 12/28/12 67.92 66.72
5,556.23 03/28/13 64.84 63.64
5,556.04 06/27/13 65.03 63.83
5,556.09 09/27/13 64.98 63.78
Water Levels and Data over Time
White Mesa Mill -Well TW4-7
Measuring Total or Total Water Land Measured Total Depth
Elevation Surface Point Length Of Date Of Depth to Depth to Of Well
(WL) (LSD) Elevation Riser (L) Monitoring Water Water (blw.LSD) (MP) (blw.MP} (blw.LSD)
5,619.87 5,621.07 1.20 121.0
5,555.80 12/20/13 65.27 64.07
5,555.40 03/27/14 65.67 64.47
5,554.20 06/25/14 66.87 65.67
5,552.96 09/25/14 68.11 66.91
5,552.62 12/17/14 68.45 67.25
5,548.57 03/26/15 72.50 71.30
5,555.88 06/22/15 65.19 63.99
5,546.22 09/30/15 74.85 73.65
5,539.47 12/02/15 81.60 80.40
5,545.08 03/30/16 75.99 74.79
5,544.62 06/30/16 76.45 75.25
5,544.61 09/29/16 76.46 75.26
5,544.09 12/21/16 76.98 75.78
5,546.07 03/30/17 75.00 73.80
5,549.36 06/27/17 71.71 70.51
5,541.91 09/28/17 79.16 77.96
5,540.51 11/30/17 80.56 79.36
5,540.71 03/28/18 80.36 79.16
5,540.12 06/22/18 80.95 79.75
5,540.17 09/25/18 80.90 79.70
5,538.26 12/17/18 82.81 81.61
5,538.81 03/25/19 82.26 81.06
5,539.11 06/24/19 81.96 80.76
5,539.75 08/12/19 81.32 80.12
5,539.13 11/18/19 81.94 80.74
5,538.03 02/10/20 83.04 81.84
5,538.29 05/04/20 82.78 81.58
5,540.28 09/22/20 80.79 79.59
5,539.17 12/30/20 81.90 80.70
5,539.03 03/11/21 82.04 80.84
5,538.82 06/24/21 82.25 81.05
5,539.00 08/13/21 82.07 80.87
5,539.08 12/30/21 81.99 80.79
5,537.94 02/10/22 83.13 81.93
5,538.86 06/28/22 82.21 81.01
5,538.64 08/15/22 82.43 81.23
5,538.68 11/17/22 82.39 81.19
5,538.18 03/24/23 82.89 81.69
5,538.37 06/26/23 82.70 81.50
5,536.84 09/28/23 84.23 83.03
5,538.29 11/20/23 82.78 81.58
5,537.80 03/26/24 83.27 82.07
5,538.13 06/26/24 82.94 81.74
5,538.24 09/23/24 82.83 81.63
Water Levels and Data over Time
White Mesa Mill -Well TW4-8
Total or
Measuring Measured
Water Land Point Depth to Total Depth Total
Elevation Surface Elevation Length Of Date Of Water to Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,616.80 5,621.40 4.60 126.2
5,546.40 11/29/99 75.00 70.40
5,546.20 01/02/00 75.20 70.60
5,546.50 01/IO/00 74.90 70.30
5,546.30 01/17/00 75.10 70.50
5,546.60 01/24/00 74.80 70.20
5,546.50 02/01/00 74.90 70.30
5,546.50 02/07/00 74.90 70.30
5,546.90 02/14/00 74.50 69.90
5,546.95 02/23/00 74.45 69.85
5,547.05 03/01/00 74.35 69.75
5,547.05 03/08/00 74.35 69.75
5,547.IO 03/15/00 74.30 69.70
5,547.50 03/20/00 73.90 69.30
5,547.40 03/29/00 74.00 69.40
5,547.20 04/04/00 74.20 69.60
5,547.40 04/13/00 74.00 69.40
5,547.60 04/21/00 73.80 69.20
5,547.70 04/28/00 73.70 69.10
5,547.70 05/01/00 73.70 69.IO
5,548.00 05/11/00 73.40 68.80
5,547.70 05/15/00 73.70 69.IO
5,547.90 05/25/00 73.50 68.90
5,547.90 06/09/00 73.50 68.90
5,548.00 06/16/00 73.40 68.80
5,547.87 06/26/00 73.53 68.93
5,547.95 07/06/00 73.45 68.85
5,547.96 07/13/00 73.44 68.84
5,547.95 07/18/00 73.45 68.85
5,548.11 07/27/00 73.29 68.69
5,548.15 08/02/00 73.25 68.65
5,548.17 08/09/00 73.23 68.63
5,548.16 08/15/00 73.24 68.64
5,548.40 08/31/00 73.00 68.40
5,548.50 09/08/00 72.90 68.30
5,548.62 09/13/00 72.78 68.18
5,548.75 09/20/00 72.65 68.05
5,548.76 10/05/00 72.64 68.04
5,549.00 11/09/00 72.40 67.80
5,548.85 12/06/00 72.55 67.95
5,549.47 01/03/01 71.93 67.33
5,549.89 02/09/01 71.51 66.91
5,550.37 03/27/01 71.03 66.43
5,550.50 04/30/01 70.90 66.30
Water Levels and Data over Time
White Mesa Mill-Well TW4-8
Total or
Measuring Measured
Water Land Point Depth to Total Depth Total
Elevation Surface Elevation Length Of Date Of Water to Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,616.80 5,621.40 4.60 126.2
5,550.68 05/31/01 70.72 66.12
5,550.68 06/20/01 70.72 66.12
5,551.02 07/10/01 70.38 65.78
5,551.32 08/20/01 70.08 65.48
5,551.49 09/19/01 69.91 65.31
5,551.64 10/02/01 69.76 65.16
5,551.81 11/08/01 69.59 64.99
5,552.22 12/03/01 69.18 64.58
5,552.16 01/03/02 69.24 64.64
5,552.38 02/06/02 69.02 64.42
5,552.85 03/26/02 68.55 63.95
5,552.83 04/09/02 68.57 63.97
5,553.20 05/23/02 68.20 63.60
5,553.16 06/05/02 68.24 63.64
5,553.32 07/08/02 68.08 63.48
5,553.49 08/23/02 67.91 63.31
5,553.69 09/11/02 67.71 63.11
5,554.09 10/23/02 67.31 62.71
5,554.02 I 1/22/02 67.38 62.78
5,554.23 12/03/02 67.17 62.57
5,554.43 01/09/03 66.97 62.37
5,554.42 02/12/03 66.98 62.38
5,554.71 03/26/03 66.69 62.09
5,554.83 04/02/03 66.57 61.97
5,552.21 05/01/03 69.19 64.59
5,547.93 06/09/03 73.47 68.87
5,546.97 07/07/03 74.43 69.83
5,546.58 08/04/03 74.82 70.22
5,546.24 09/11/03 75.16 70.56
5,546.38 10/02/03 75.02 70.42
5,546.40 11/07/03 75.00 70.40
5,546.59 12/03/03 74.81 70.21
5,551.29 01/15/04 70.11 65.51
5,552.69 02/10/04 68.71 64.11
5,554.06 03/28/04 67.34 62.74
5,554.52 04/12/04 66.88 62.28
5,555.06 05/13/04 66.34 61.74
5,555.11 06/18/04 66.29 61.69
5,555.88 07/28/04 65.52 60.92
5,552.97 08/30/04 68.43 63.83
5,550.65 09/16/04 70.75 66.15
5,548.40 10/11/04 73.00 68.40
5,548.28 I 1/16/04 73.12 68.52
Water Levels and Data over Time
White Mesa Mill -Well TW4-8
Total or
Measuring Measured
Water Land Point Depth to Total Depth Total
Elevation Surface Elevation Length Of Date Of Water to Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,6 16.80 5,621.40 4.60 126.2
5,548.80 12/22/04 72.60 68.00
5,548.43 01/18/05 72.97 68.37
5,548.61 02/28/05 72.79 68.19
5,548.64 03/15/05 72.76 68.16
5,548.65 04/26/05 72.75 68.15
5,548.85 05/24/05 72.55 67.95
5,548.73 06/30/05 72.67 68.07
5,548.62 07/29/05 72.78 68.18
5,548.80 09/12/05 72.60 68.00
5,548.71 12/07/05 72.69 68.09
5,549.72 03/08/06 71.68 67.08
5,549.70 06/13/06 71.70 67.10
5,549.70 07/18/06 71.70 67.10
5,549.65 11/07/06 71.75 67.15
5,551.11 02/27/07 70.29 65.69
5,550.20 05/02/07 71.20 66.60
5,550.59 08/14/07 70.81 66.21
5,550.76 10/10/07 70.64 66.04
5,551.95 03/26/08 69.45 64.85
5,552.36 06/24/08 69.04 64.44
5,552.50 08/26/08 68.90 64.30
5,552.56 10/14/08 68.84 64.24
5,552.91 03/03/09 68.49 63.89
5,553.27 06/24/09 68.13 63.53
5,553.12 09/10/09 68.28 63.68
5,553.63 12/11/09 67.77 63.17
5,554.65 03/11/10 66.75 62.15
5,554.57 05/11/10 66.83 62.23
5,554.34 09/29/10 67.06 62.46
5,554.09 12/21/10 67.31 62.71
5,554.50 02/28/11 66.9 62.30
5,554.79 06/21/11 66.61 62.01
5,554.63 09/20/11 66.77 62.17
5,555.01 12/21/11 66.39 61.79
5,554.85 03/27/12 66.55 61.95
5,554.90 06/28/12 66.5 61.90
5,554.85 09/27/12 66.55 61.95
5,554.86 12/28/12 66.54 61.94
5,556.48 03/28/13 64.92 60.32
5,556.35 06/27/13 65.05 60.45
5,556.60 09/27/13 64.80 60.20
5,556.56 12/20/13 64.84 60.24
5,556.38 03/27/14 65.02 60.42
Water Levels and Data over Time
White Mesa Mill -Well TW4-8
Total or
Measuring Measured
Water Land Point Depth to Total Depth Total
Elevation Surface Elevation Length Of Date Of Water to Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,616.80 5,621.40 4.60 126.2
5,555.56 06/25/14 65.84 61.24
5,554.82 09/25/14 66.58 61.98
5,554.95 12/17/14 66.45 61.85
5,546.89 03/26/15 74.51 69.91
5,547.80 06/22/15 73.60 69.00
5,544.84 09/30/15 76.56 71.96
5,540.22 12/02/15 81.18 76.58
5,542.00 03/30/16 79.40 74.80
5,542.10 06/30/16 79.30 74.70
5,541.70 09/29/16 79.70 75.10
5,539.90 12/21/16 81.50 76.90
5,541.70 03/30/17 79.70 75.10
5,542.19 06/27/17 79.21 74.61
5,540.58 09/28/17 80.82 76.22
5,538.52 11/30/17 82.88 78.28
5,537.95 03/28/18 83.45 78.85
5,537.73 06/22/18 83.67 79.07
5,537.38 09/25/18 84.02 79.42
5,536.86 12/17/18 84.54 79.94
5,536.30 03/25/19 85.10 80.50
5,536.67 06/24/19 84.73 80.13
5,536.82 08/12/19 84.58 79.98
5,536.37 11/18/19 85.03 80.43
5,535.53 02/10/20 85.87 81.27
5,535.25 05/04/20 86.15 81.55
5,535.49 09/22/20 85.91 81.31
5,534.69 12/30/20 86.71 82.11
5,534.92 03/11/21 86.48 81.88
5,534.82 06/24/21 86.58 81.98
5,536.12 08/13/21 85.28 80.68
5,534.94 12/30/21 86.46 81.86
5,535.76 02/10/22 85.64 81.04
5,534.80 06/28/22 86.60 82.00
5,535.98 08/15/22 85.42 80.82
5,535.89 11/17/22 85.51 80.91
5,536.04 03/24/23 85.36 80.76
5,536.13 06/26/23 85.27 80.67
5,536.00 09/28/23 85.40 80.80
5,536.21 11/20/23 85.19 80.59
5,535.44 03/26/24 85.96 81.36
5,535.43 06/26/24 85.97 81.37
5,535.62 09/23/24 85.78 81.18
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11/29/99
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11/29/03
11/29/04
11/29/05
11/29/06
11/29/07
11/29/08
11/29/09
11/29/10
11/29/11
11/29/12
11/29/13
11/29/14
11/29/15
11 /29/16
11/29/17
11/29/18
11/29/19
11/29/20
11/29/21
11/29/22
11/29/23
11/29/24
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Water Levels and Data over Time
White Mesa Mill -Well TW 4-9
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5 636.11 5,63 7.59 1.48 120.1
5,577.09 12/20 /99 60.50 59.02
5,577.09 01/02/00 60.50 59.02
5,577.29 01/10/00 60.30 58.82
5,577.09 01/17/00 60.50 59.02
5,577.39 01/24/00 60.20 58.72
5,577.29 02/01/00 60.30 58.82
5,577.19 02/07/00 60.40 58.92
5,577.69 02/14/00 59.90 58.42
5,577.69 02/23/00 59.90 58.42
5,577.79 03/01/00 59.80 58.32
5,577.79 03/08/00 59.80 58.32
5,577.89 03/15/00 59.70 58.22
5,568.49 03/20/00 69.10 67.62
5,578.14 03/29/00 59.45 57.97
5,577.84 04/04/00 59.75 58.27
5,578.04 04/13/00 59.55 58.07
5,578.24 04/21/00 59.35 57.87
5,578.39 04/28/00 59.20 57.72
5,578.39 05/01/00 59.20 57.72
5,578.79 05/11/00 58.80 57.32
5,578.39 05/15/00 59.20 57.72
5,578.79 05/25/00 58.80 57.32
5,578.81 06/09/00 58.78 57.30
5,578.89 06/16/00 58.70 57.22
5,578.74 06/26/00 58.85 57.37
5,578.86 07/06/00 58.73 57.25
5,578.87 07/13/00 58.72 57.24
5,578.84 07/18/00 58.75 57.27
5,579.03 07/27/00 58.56 57.08
5,579.03 08/02/00 58.56 57.08
5,579.05 08/09/00 58.54 57.06
5,579.04 08/15/00 58.55 57.07
5,579.25 08/31/00 58.34 56.86
5,579.35 09/08/00 58.24 56.76
5,579.40 09/13/00 58.19 56.71
5,579.46 09/20/00 58.13 56.65
5,579.44 10/05/00 58.15 56.67
5,579.79 11/09/00 57.80 56.32
5,579.73 12/06/00 57.86 56.38
5,580.01 01/03/01 57.58 56.10
5,580.30 02/09/01 57.29 55.81
5,580.66 03/27/01 56.93 55.45
5,580.75 04/30/01 56.84 55.36
Water Levels and Data over Time
White Mesa Mill -Well TW 4-9
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,636.11 5,637.59 1.48 120.1
5,581.04 05/31/0 I 56.55 55.07
5,581.12 06/21/01 56.47 54.99
5,581.15 07/10/01 56.44 54.96
5,581.51 08/20/01 56.08 54.60
5,581.70 09/19/01 55.89 54.41
5,581.61 10/02/01 55.98 54.50
5,581.83 11/08/01 55.76 54.28
5,582.17 12/03/01 55.42 53.94
5,582.21 01/03/02 55.38 53.90
5,582.57 02/06/02 55.02 53.54
5,583.12 03/26/02 54.47 52.99
5,582.77 04/09/02 54.82 53.34
5,583.21 05/23/02 54.38 52.90
5,582.94 06/05/02 54.65 53.17
5,582.71 07/08/02 54.88 53.40
5,583.67 08/23/02 53.92 52.44
5,583.82 09/11/02 53.77 52.29
5,584.01 10/23/02 53.58 52.10
5,583.88 11/22/02 53.71 52.23
5,583.81 12/03/02 53.78 52.30
5,584.28 01/09/03 53.31 51.83
5,584.41 02/12/03 53.18 51.70
5,584.68 03/26/03 52.91 51.43
5,584.49 04/02/03 53.10 51.62
5,584.51 05/01/03 53.08 51.60
5,583.59 06/09/03 54.00 52.52
5,582.96 07/07/03 54.63 53.15
5,582.98 08/04/03 54.61 53.13
5,582.57 09/11/03 55.02 53.54
5,582.25 10/02/03 55.34 53.86
5,582.09 11/07/03 55.50 54.02
5,582.48 12/03/03 55.11 53.63
5,583.69 01/15/04 53.90 52.42
5,583.89 02/10/04 53.70 52.22
5,584.30 03/28/04 53.29 51.81
5,584.59 04/12/04 53.00 51.52
5,584.87 05/13/04 52.72 51.24
5,584.96 06/18/04 52.63 51.15
5,585.50 07/28/04 52.09 50.61
5,584.81 08/30/04 52.78 51.30
5,584.40 09/16/04 53.19 51.71
5,583.91 10/11/04 53.68 52.20
5,583.39 11/16/04 54.20 52.72
Water Levels and Data over Time
White Mesa Mill -Well TW 4-9
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,636.11 5,637.59 1.48 120.1
5,583.54 12/22/04 54.05 52.57
5,583.34 01/18/05 54.25 52.77
5,583.66 02/28/05 53.93 52.45
5,583.87 03/15/05 53.72 52.24
5,584.74 04/26/05 52.85 51.37
5,585.26 05/24/05 52.33 50.85
5,585.06 06/30/05 52.53 51.05
5,584.67 07/29/05 52.92 51.44
5,584.75 09/12/05 52.84 51.36
5,584.51 12/07/05 53.08 51.60
5,585.74 03/08/06 51.85 50.37
5,584.74 06/13/06 52.85 51.37
5,584.26 07/18/06 53.33 51.85
5,584.21 11/07/06 53.38 51.90
5,584.67 02/27/07 52.92 51.44
5,584.06 05/02/07 53.53 52.05
5,585.33 08/14/07 52.26 50.78
5,585.42 10/10/07 52.17 50.69
5,587.01 03/26/08 50.58 49.10
5,585.44 06/24/08 52.15 50.67
5,585.23 08/26/08 52.36 50.88
5,584.42 10/14/08 53.17 51.69
5,583.59 03/03/09 54.00 52.52
5,583.35 06/24/09 54.24 52.76
5,582.91 09/10/09 54.68 53.20
5,583.43 12/11/09 54.16 52.68
5,584.00 03/11/10 53.59 52.11
5,583.27 05/11/10 54.32 52.84
5,582.92 09/29/10 54.67 53.19
5,583.08 12/21/10 54.51 53.03
5,582.63 02/28/11 54.96 53.48
5,583.62 06/21/11 53.97 52.49
5,583.52 09/20/11 54.07 52.59
5,583.91 12/21/11 53.68 52.20
5,582.84 03/27/12 54.75 53.27
5,582.84 06/28/12 54.75 53.27
5,582.92 09/27/12 54.67 53.19
5,582.84 12/28/12 54.75 53.27
5,581.97 03/28/13 55.62 54.14
5,581.19 06/27/13 56.40 54.92
5,580.50 09/27/13 57.09 55.61
5,579.73 12/20/13 57.86 56.38
5,578.61 03/27/14 58.98 57.50
Water Levels and Data over Time
White Mesa Mill -Well TW 4-9
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,636.11 5,637.59 1.48 120.1
5,577.24 06/25/14 60.35 58.87
5,576.24 09/25/14 61.35 59.87
5,576.44 12/17/14 61.15 59.67
5,576.35 03/26/15 61.24 59.76
5,576.48 06/22/15 61.11 59.63
5,575.98 09/30/15 61.61 60.13
5,575.41 12/02/15 62.18 60.70
5,575.38 03/30/16 62.21 60.73
5,574.74 06/30/16 62.85 61.37
5,574.26 09/29/16 63.33 61.85
5,573.88 12/21/16 63.71 62.23
5,573.99 03/30/17 63.60 62.12
5,573.49 06/27/17 64.10 62.62
5,573.05 09/28/17 64.54 63.06
5,572.34 11/30/17 65.25 63.77
5,574.97 03/28/18 62.62 61.14
5,571.69 06/22/18 65.90 64.42
5,571.20 09/25/18 66.39 64.91
5,570.92 12/17/18 66.67 65.19
5,570.16 03/25/19 67.43 65 .95
5,570.17 06/24/19 67.42 65 .94
5,570.01 08/12/19 67.58 66.10
5,569.66 11/18/19 67.93 66.45
5,569.38 02/10/20 68.21 66.73
5,569.04 05/04/20 68.55 67.07
5,568.30 09/22/20 69.29 67.81
5,568.12 12/30/20 69.47 67.99
5,568.18 03/11/21 69.41 67.93
5,567.66 06/24/21 69.93 68.45
5,567.54 08/13/21 70.05 68.57
5,567.77 12/30/21 69.82 68.34
5,567.12 02/10/22 70.47 68.99
5,567.68 06/28/22 69.91 68.43
5,566.83 08/15/22 70.76 69.28
5,566.66 11/17/22 70.93 69.45
5,566.20 03/24/23 71.39 69.91
5,566.31 06/26/23 71.28 69.8
5,566.22 09/28/23 71.37 69.89
5,566.18 11/20/23 71.41 69.93
5,565.79 03/26/24 71.80 70.32
5,565.62 06/26/24 71.97 70.49
5,565.50 09/23/24 72.09 70.61
Water Levels and Data over Time
White Mesa Mill -Well TW 4-10
Total or
Measuring Measured Total
Water Land Point Length Depth to Depth to Total
Elevation Surface Elevation Of Riser Date Of Water Water Depth Of
(WL) (LSD) (MP) (L) Monitoring (blw.MP) (blw.LSD) Well
5,631.99 5,634.24 2.25 113.2
5,576.75 01/03/02 57.49 55.24
5,576.92 02/06/02 57.32 55.07
5,577.43 03/26/02 56.81 54.56
5,577.22 04/09/02 57.02 54.77
5,577.80 05/23/02 56.44 54.19
5,577.47 06/05/02 56.77 54.52
5,577.55 07/08/02 56.69 54.44
5,578.10 08/23/02 56.14 53.89
5,578.24 09/11/02 56.00 53.75
5,578.49 10/23/02 55.75 53.50
5,578.43 11/22/02 55.81 53.56
5,578.43 12/03/02 55.81 53.56
5,578.66 01/09/03 55.58 53.33
5,578.66 02/12/03 55.58 53.33
5,578.78 03/26/03 55.46 53.21
5,578.90 04/02/03 55.34 53.09
5,578.83 05/01/03 55.41 53.16
5,578.05 06/09/03 56.19 53.94
5,577.38 07/07/03 56.86 54.61
5,577.15 08/04/03 57.09 54.84
5,576.76 09/11/03 57.48 55.23
5,576.36 10/02/03 57.88 55.63
5,576.05 11/07/03 58.19 55.94
5,576.20 12/03/03 58.04 55.79
5,577.43 01/15/04 56.81 54.56
5,577.81 02/10/04 56.43 54.18
5,578.47 03/28/04 55.77 53.52
5,578.69 04/12/04 55.55 53.30
5,578.93 05/13/04 55.31 53.06
5,578.99 06/18/04 55.25 53.00
5,579.18 07/28/04 55.06 52.81
5,579.06 08/30/04 55.18 52.93
5,578.78 09/16/04 55.46 53.21
5,577.80 10/11/04 56.44 54.19
5,577.13 11/16/04 57.11 54.86
5,576.96 12/22/04 57.28 55.03
5,576.63 01/18/05 57.61 55.36
5,576.82 02/28/05 57.42 55.17
5,576.86 03/15/05 57.38 55.13
5,577.52 04/26/05 56.72 54.47
5,578.01 05/24/05 56.23 53.98
5,578.15 06/30/05 56.09 53.84
5,577.90 07/29/05 56.34 54.09
Water Levels and Data over Time
White Mesa Mill -Well TW 4-10
Total or
Measuring Measured Total
Water Land Point Length Depth to Depth to Total
Elevation Surface Elevation Of Riser Date Of Water Water Depth Of
(WL) (LSD) (MP) (L) Monitoring (blw.MP) (blw.LSD) Well
5,631.99 5,634.24 2.25 113.2
5,578.02 09/12/05 56.22 53.97
5,577.56 12/07/05 56.68 54.43
5,579.69 03/08/06 54.55 52.30
5,578.34 06/13/06 55.90 53.65
5,577.94 07/18/06 56.30 54.05
5,578.01 11/07/06 56.23 53.98
5,578.43 02/27/07 55.81 53.56
5,577.84 05/02/07 56.40 54.15
5,578.74 08/14/07 55.50 53.25
5,579.04 10/10/07 55.20 52.95
5,580.69 03/26/08 53.55 51.30
5,579.87 06/24/08 54.37 52.12
5,579.47 08/26/08 54.77 52.52
5,578.87 10/14/08 55.37 53.12
5,578.01 03/10/09 56.23 53.98
5,577.85 06/24/09 56.39 54.14
5,577.49 09/10/09 56.75 54.50
5,577.98 12/11/09 56.26 54.01
5,578.38 03/11/10 55.86 53.61
5,578.16 05/11/10 56.08 53.83
5,577.85 09/29/10 56.39 54.14
5,577.28 12/21/10 56.96 54.71
5,577.14 02/28/11 57.10 54.85
5,578.09 06/21/11 56.15 53.90
5,578.24 09/20/11 56.00 53.75
5,578.74 12/21/11 55.50 53.25
5,577.89 03/27/12 56.35 54.10
5,577.90 06/28/12 56.34 54.09
5,578.29 09/27/12 55.95 53.70
5,577.87 12/28/12 56.37 54.12
5,577.92 03/28/13 56.32 54.07
5,577.19 06/27/13 57.05 54.80
5,576.77 09/27/13 57.47 55.22
5,576.22 12/20/13 58.02 55.77
5,575.36 03/27/14 58.88 56.63
5,574.11 06/25/14 60.13 57.88
5,573.19 09/25/14 61.05 58.80
5,573.19 12/17/14 61.05 58.80
5,573.12 03/26/15 61.12 58.87
5,573.33 06/22/15 60.91 58.66
5,572.98 09/30/15 61.26 59.01
5,572.39 12/02/15 61.85 59.60
5,572.64 03/30/16 61.60 59.35
Water Levels and Data over Time
White Mesa Mill -Well TW 4-10
Total or
Measuring Measured Total
Water Land Point Length Depth to Depth to Total
Elevation Surface Elevation Of Riser Date Of Water Water Depth Of
(WL) (LSD) (MP) (L) Monitoring (blw.MP) (blw.LSD) Well
5,631.99 5,634.24 2.25 113.2
5,571.79 06/30/16 62.45 60.20
5,571.27 09/29/16 62.97 60.72
5,570.94 12/21/16 63.30 61.05
5,571.09 03/30/17 63.15 60.90
5,570.59 06/27/17 63.65 61.40
5,570.12 09/28/17 64.12 61.87
5,569.42 11/30/17 64.82 62.57
5,569.06 03/28/18 65.18 62.93
5,568.81 06/22/18 65.43 63.18
5,568.33 09/25/18 65.91 63.66
5,568.08 12/17/18 66.16 63.91
5,567.33 03/25/19 66.91 64.66
5,567.39 06/24/19 66.85 64.60
5,567.21 08/12/19 67.03 64.78
5,566.88 11/18/19 67.36 65.11
5,566.61 02/10/20 67.63 65.38
5,566.27 05/04/20 67.97 65.72
5,565.53 09/22/20 68.71 66.46
5,565.33 12/30/20 68.91 66.66
5,565.46 03/11/21 68.78 66.53
5,564.86 06/24/21 69.38 67.13
5,564.89 08/13/21 69.35 67.10
5,565.05 12/30/21 69.19 66.94
5,564.41 02/10/22 69.83 67.58
5,564.82 06/28/22 69.42 67.17
5,564.09 08/15/22 70.15 67.90
5,563.87 11/17/22 70.37 68.12
5,563.52 03/24/23 70.72 68.47
5,563.54 06/26/23 70.70 68.45
5,563.51 09/28/23 70.73 68.48
5,563.28 11/20/23 70.96 68.71
5,563.12 03/26/24 71.12 68.87
5,562.99 06/26/24 71.25 69.00
5,562.88 09/23/24 71.36 69.11
Water Levels and Data over Time
White Mesa Mill -Well TW 4-11
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,621.92 5,623.62 1.70 102.4
5,548 .32 0 1/03 /02 75.30 73.60
5,548.73 02/06/02 74.89 73.19
5,549.03 03/26/02 74.59 72.89
5,548.84 04/09/02 74.78 73.08
5,549.30 05/23/02 74.32 72.62
5,549.01 06/05/02 74.61 72.91
5,549.22 07/08/02 74.40 72.70
5,549.44 08/23/02 74.18 72.48
5,549.57 09/11/02 74.05 72.35
5,549.64 10/23/02 73.98 72.28
5,549.58 11/22/02 74.04 72.34
5,549.62 12/03/02 74.00 72.30
5,549.85 01/09/03 73.77 72.07
5,549.91 02/12/03 73.71 72.01
5,550.15 03/26/03 73.47 71.77
5,550.01 04/02/03 73.61 71.91
5,550.31 05/01/03 73.31 71.61
5,550.44 06/09/03 73.18 71.48
5,550.33 07/07/03 73.29 71.59
5,550.35 08/04/03 73.27 71.57
5,550.44 09/11/03 73.18 71.48
5,550.47 10/02/03 73.15 71.45
5,550.60 11/07/03 73.02 71.32
5,550.60 12/03/03 73.02 71.32
5,550.94 01/15/04 72.68 70.98
5,551.00 02/10/04 72.62 70.92
5,550.34 03/28/04 73.28 71.58
5,551.54 04/12/04 72.08 70.38
5,551.89 05/13/04 71.73 70.03
5,551.94 06/18/04 71.68 69.98
5,552.49 07/28/04 71.13 69.43
5,552.74 08/30/04 70.88 69.18
5,553.01 09/16/04 70.61 68.91
5,553.11 10/11/04 70.51 68.81
5,553.19 11/16/04 70.43 68.73
5,553.53 12/22/04 70.09 68.39
5,553.31 01/18/05 70.31 68.61
5,553.84 02/28/05 69.78 68.08
5,554.04 03/15/05 69.58 67.88
5,554.23 04/26/05 69.39 67.69
5,553.87 05/24/05 69.75 68.05
5,554.46 06/30/05 69.16 67.46
5,554.57 07/29/05 69.05 67.35
Water Levels and Data over Time
White Mesa Mill -Well TW 4-11
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,621.92 5,623.62 1.70 102.4
5,553.86 09/12/05 69.76 68.06
5,555.30 12/07/05 68.32 66.62
5,556.20 03/08/06 67.42 65.72
5,556.48 06/14/06 67.14 65.44
5,556.37 07/18/06 67.25 65.55
5,556.94 11/07/06 66.68 64.98
5557.92 02/27/07 65.70 64.00
5,557.84 05/02/07 65.78 64.08
5,558.02 08/15/07 65.60 63.90
5,557.13 10/10/07 66.49 64.79
5,569.74 03/26/08 53.88 52.18
5,561.01 06/24/08 62.61 60.91
5,562.07 08/26/08 61.55 59.85
5,562.47 10/14/08 61.15 59.45
5,563.80 03/10/09 59.82 58.12
5,564.27 06/24/09 59.35 57.65
5,564.32 09/10/09 59.30 57.60
5,564.70 12/11/09 58.92 57.22
5,565.14 03/11/10 58.48 56.78
5,565.61 05/11/10 58.01 56.31
5,565.67 09/29/10 57.95 56.25
5,565.62 12/21/10 58.00 56.30
5,565.42 02/28/11 58.20 56.50
5,566.01 06/21/11 57.61 55.91
5,566.03 09/20/11 57.59 55.89
5,566.63 12/21/11 56.99 55.29
5,565.81 03/27/12 57.81 56.11
5,565.82 06/28/12 57.80 56.10
5,566.66 09/27/12 56.96 55.26
5,565.77 12/28/12 57.85 56.15
5,566.89 03/28/13 56.73 55.03
5,566.32 06/27/13 57.30 55.60
5,565.92 09/27/13 57.70 56.00
5,565.63 12/20/13 57.99 56.29
5,565.03 03/27/14 58.59 56.89
5,564.18 06/25/14 59.44 57.74
5,563.52 09/25/14 60.10 58.40
5,563.37 12/17/14 60.25 58.55
5,532.62 03/26/15 91.00 89.30
5,527.07 06/22/15 96.55 94.85
5,533.27 09/30/15 90.35 88.65
5,532.67 12/02/15 90.95 89.25
5,531.44 03/30/16 92.18 90.48
Water Levels and Data over Time
White Mesa Mill -Well TW 4-11
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,621.92 5,623.62 1.70 102.4
5,529.85 06/30/16 93.77 92.07
5,530.64 09/29/16 92.98 91.28
5,530.61 12/21/16 93.01 91.31
5,538.48 03/30/17 85.14 83.44
5,529.93 06/27/17 93.69 91.99
5,530.41 09/28/17 93.21 91.51
5,531.26 11/30/17 92.36 90.66
5,530.28 03/28/18 93.34 91.64
5,530.36 06/22/18 93.26 91.56
5,530.41 09/24/18 93.21 91.51
5,531.96 12/17/18 91.66 89.96
5,532.84 03/25/19 90.78 89.08
5,533.62 06/24/19 90.00 88.30
5,532.49 08/12/19 91.13 89.43
5,532.50 11/18/19 91.12 89.42
5,533.60 02/10/20 90.02 88.32
5,533.02 05/04/20 90.60 88.90
5,530.54 09/21/20 93.08 91.38
5,533.51 12/28/20 90.11 88.41
5,533.54 03/11/21 90.08 88.38
5,534.12 06/24/21 89.50 87.80
5,533.72 08/13/21 89.90 88.20
5,533.62 12/30/21 90.00 88.30
5,533.51 02/10/22 90.11 88.41
5,534.08 06/28/22 89.54 87.84
5,533.84 08/15/22 89.78 88.08
5,533.21 11/17/22 90.41 88.71
5,524.87 03/24/23 98.75 97.05
5,533.87 06/26/23 89.75 88.05
5,534.86 09/25/23 88.76 87.06
5,534.84 11/20/23 88.78 87.08
5,533.61 03/25/24 90.01 88.31
5,534.39 06/26/24 89.23 87.53
5,533.18 09/23/24 90.44 88.74
Water Levels and Data over Time
White Mesa Mill -Well TW 4-12
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,622.38 5,624.23 1.85 103.2
5,580.91 08/23/02 43.32 41.47
5,581.54 09/11/02 42.69 40.84
5,581.33 10/23/02 42.90 41.05
5,581.47 11/22/02 42.76 40.91
5,581.55 12/03/02 42.68 40.83
5,582.58 01/09/03 41.65 39.80
5,582.47 02/12/03 41.76 39.91
5,582.71 03/26/03 41.52 39.67
5,582.11 04/02/03 42.12 40.27
5,582.92 05/01/03 41.31 39.46
5,583.13 06/09/03 41.10 39.25
5,583.21 07/07/03 41.02 39.17
5,583.31 08/04/03 40.92 39.07
5,583.55 09/11/03 40.68 38.83
5,583.72 10/02/03 40.51 38.66
5,583.77 11/07/03 40.46 38.61
5,584.01 12/03/03 40.22 38.37
5,584.37 01/15/04 39.86 38.01
5,584.39 02/10/04 39.84 37.99
5,584.51 03/28/04 39.72 37.87
5,584.90 04/12/04 39.33 37.48
5,584.88 05/13/04 39.35 37.50
5,584.93 06/18/04 39.30 37.45
5,585.36 07/28/04 38.87 37.02
5,585.38 08/30/04 38.85 37.00
5,585.49 09/16/04 38.74 36.89
5,585.85 10/11/04 38.38 36.53
5,585.91 11/16/04 38.32 36.47
5,586.35 12/22/04 37.88 36.03
5,586.14 01/18/05 38.09 36.24
5,586.56 02/28/05 37.67 35.82
5,586.95 03/15/05 37.28 35.43
5,587.20 04/26/05 37.03 35.18
5,587.35 05/24/05 36.88 35.03
5,587.58 06/30/05 36.65 34.80
5,587.58 07/29/05 36.65 34.80
5,587.94 09/12/05 36.29 34.44
5,588.43 12/07/05 35.80 33.95
5,588.92 03/08/06 35.31 33.46
5,588.34 06/13/06 35.89 34.04
5,588.33 07/18/06 35.90 34.05
5,584.70 11/07/06 39.53 37.68
5588.85 02/27/07 35.38 33.53
Water Levels and Data over Time
White Mesa Mill -Well TW 4-12
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitorin~ (blw.MP) (blw.LSD) Well
5,622.38 5,624.23 1.85 103.2
5,588.53 05/02/07 35.70 33 .85
5,586.49 08/14/07 37.74 35 .89
5,586.68 10/10/07 37.55 35.70
5,587.76 03/26/08 36.47 34.62
5,587.59 06/24/08 36.64 34.79
5,587.35 08/26/08 36.88 35.03
5,586.84 10/14/08 37.39 35 .54
5,586.17 03/03/09 38.06 36.21
5,585.74 06/24/09 38.49 36.64
5,585.54 09/10/09 38.69 36.84
5,585.77 12/11/09 38.46 36 .61
5,585.88 03/11/10 38.35 36.50
5,586.35 05/11/10 37.88 36.03
5,585.68 09/29/10 38.55 36.70
5,585.09 12/21/10 39.14 37.29
5,584.65 02/28/11 39.58 37.73
5,584.76 06/21/11 39.47 37.62
5,584.32 09/20/11 39.91 38.06
5,584.22 12/21/11 40.01 38.16
5,577.07 03/27/12 47.16 45.31
5,577.05 06/28/12 47.18 45.33
5,583.14 09/27/12 41.09 39.24
5,577.10 12/28/12 47.13 45.28
5,582.71 03/28/13 41.52 39.67
5,582.25 06/27/13 41.98 40.13
5,582.24 09/27/13 41.99 40.14
5,582.12 12/20/13 42.11 40.26
5,581.67 03/27/14 42.56 40.71
5,581.03 06/25/14 43.20 41.35
5,580.49 09/25/14 43 .74 41.89
5,580.33 12/17/14 43.90 42 .05
5,579.28 03/26/15 44.95 43.10
5,579.23 06/22/15 45.00 43.15
5,578.87 09/30/15 45.36 43.51
5,578.53 12/02/15 45.70 43.85
5,578.53 03/30/16 45.70 43.85
5,578.03 06/30/16 46.20 44.35
5,577.54 09/29/16 46.69 44.84
5,577.27 12/21/16 46.96 45.11
5,577.00 03/30/17 47.23 45.38
5,576.59 06/27/17 47.64 45.79
5,576.00 09/28/17 48.23 46.38
5,575.27 11/29/17 48.96 47.I l
Water Levels and Data over Time
White Mesa Mill -Well TW 4-12
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,622.38 5,624.23 1.85 103.2
5,573.64 03/28/18 50.59 48.74
5,572.58 06/22/18 51.65 49.80
5,571.91 09/25/18 52.32 50.47
5,571.49 12/17/18 52.74 50.89
5,570.77 03/25/19 53.46 51.61
5,570.78 06/24/19 53.45 51.60
5,570.54 08/12/19 53.69 51.84
5,570.06 11/18/19 54.17 52.32
5,570.02 02/10/20 54.21 52.36
5,569.45 05/04/20 54.78 52.93
5,569.03 09/22/20 55.20 53.35
5,568.91 12/30/20 55.32 53.47
5,568.99 03/11/21 55.24 53.39
5,568.44 06/24/21 55.79 53.94
5,568.35 08/13/21 55.88 54.03
5,568.70 12/30/21 55.53 53.68
5,567.90 02/10/22 56.33 54.48
5,568.45 06/28/22 55.78 53.93
5,567.92 08/15/22 56.31 54.46
5,567.68 11/17/22 56.55 54.70
5,567.92 03/24/23 56.31 54.46
5,567.53 06/26/23 56.70 54.85
5,567.19 09/28/23 57.04 55.19
5,567.42 11/20/23 56.81 54.96
5,566.88 03/26/24 57.35 55.5
5,566.73 06/26/24 57.5 55.65
5,566.58 09/23/24 57.65 55.8
Water Levels and Data over Time
White Mesa Mill -Well TW 4-13
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,618.09 5,619.94 1.85 105.7
5,529.66 08/23/02 90.28 88.43
5,530.66 09/11/02 89.28 87.43
5,529.10 10/23/02 90.84 88.99
5,530.58 11/22/02 89.36 87.51
5,530.61 12/03/02 89.33 87.48
5,529.74 01/09/03 90.20 88.35
5,531.03 02/12/03 88.91 87.06
5,531.82 03/26/03 88.12 86.27
5,524.63 04/02/03 95.31 93.46
5,531.54 05/01/03 88.40 86.55
5,538.46 06/09/03 81.48 79.63
5,539.38 07/07/03 80.56 78.71
5,540.72 08/04/03 79.22 77.37
5,541.25 09/11/03 78.69 76.84
5,541.34 10/02/03 78.60 76.75
5,541.69 11/07/03 78.25 76.40
5,541.91 12/03/03 78.03 76.18
5,542.44 01/15/04 77.50 75.65
5,542.47 02/10/04 77.47 75.62
5,542.84 03/28/04 77.10 75.25
5,543.08 04/12/04 76.86 75.01
5,543.34 05/13/04 76.60 74.75
5,543.40 06/18/04 76.54 74.69
5,544.06 07/28/04 75.88 74.03
5,544.61 08/30/04 75.33 73.48
5,545.23 09/16/04 74.71 72.86
5,546.20 10/11/04 73.74 71.89
5,547.43 11/16/04 72.51 70.66
5,548.96 12/22/04 70.98 69.13
5,549.02 01/18/05 70.92 69.07
5,550.66 02/28/05 69.28 67.43
5,551.26 03/15/05 68.68 66.83
5,552.23 04/26/05 67.71 65.86
_5,552.87 05/24/05 67.07 65.22
5,553.42 06/30/05 66.52 64.67
5,554.00 07/29/05 65.94 64.09
5,555.21 09/12/05 64.73 62.88
5,558.13 12/07/05 61.81 59.96
5,562.93 03/08/06 57.01 55.16
5,564.39 06/13/06 55.55 53.70
5,562.09 07/18/06 57.85 56.00
5,565.49 11/07 /06 54.45 52.60
5,571.08 02/27/07 48.86 47.01
Water Levels and Data over Time
White Mesa Mill -Well TW 4-13
Total or
Measuring Measured 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
5,618.09 5,619.94 1.85 105.7
5,570.63 05/02/07 49.31 47.46
5,565.24 08/14/07 54.70 52.85
5,565.83 10/10/07 54.11 52.26
5,569.29 03/26/08 50.65 48.80
5,570.00 06/24/08 49.94 48.09
5,570.41 08/26/08 49.53 47.68
5,570.64 10/14/08 49.30 47.45
5,570.43 03/03/09 49.51 47.66
5,570.56 06/24/09 49.38 47.53
5,570.42 09/10/09 49.52 47.67
5,571.15 12/11/09 48.79 46.94
5,572.01 03/11/10 47.93 46.08
5,572.88 05/11/10 47.06 45.21
5,573.17 09/29/10 46.77 44.92
5,573.14 12/21/10 46.80 44.95
5,573. IO 02/28/11 46.84 44.99
5,573.75 06/21/11 46.19 44.34
5,573.63 09/20/11 46.31 44.46
5,573.94 12/21/11 46.00 44.15
5,572.79 03/27/12 47.15 45.30
5,572.77 06/28/12 47.17 45.32
5,573.04 09/27/12 46.90 45.05
5,572.79 12/28/12 47.15 45.30
5,573.03 03/28/13 46.91 45.06
5,572.44 06/27/13 47.50 45.65
5,573.46 09/27/13 46.48 44.63
5,573.46 12/20/13 46.48 44.63
5,572.90 03/27/14 47.04 45.19
5,571.79 06/25/14 48.15 46.30
5,571.04 09/25/14 48.90 47.05
5,571.08 12/17/14 48.86 47.01
5,569.50 03/26/15 50.44 48.59
5,569.16 06/22/15 50.78 48.93
5,568.66 09/30/15 51.28 49.43
5,568.02 12/02/15 51.92 50.07
5,568.39 03/30/16 51.55 49.70
5,567.49 06/30/16 52.45 50.60
5,566.99 09/29/16 52.95 51.10
5,566.94 12/21/16 53.00 51.15
5,567.24 03/30/17 52.70 50.85
5,566.79 06/27/17 53.15 51.30
5,566.43 09/28/17 53.51 51.66
5,566.28 11/29/17 53.66 51.81
Water Levels and Data over Time
White Mesa Mill -Well TW 4-13
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,618 .09 5,619 .94 1.85 105.7
5,566.24 03/28/18 53 .70 51.85
5,566 .03 06/22/18 53 .91 52 .06
5,565.61 09 /25/18 54.33 52.48
5,565.32 12/17/18 54.62 52.77
5,564.78 03/25/19 55.16 53.31
5,564.99 06/24/19 54.95 53 .10
5,564.78 08 /12/19 55.16 53.31
5,564.39 11 /18/19 55.55 53 .70
5,564.39 02/10 /20 55 .55 53 .70
5,563 .82 05 /04 /20 56.12 54 .27
5,563 .55 09/22/20 56.39 54.54
5,563 .51 12/30/20 56.43 54 .58
5,563.66 03/11/21 56.28 54.43
5,563.14 06/24/21 56.80 54.95
5,562.99 08/13/21 56.95 55 .10
5,563.28 12/30/21 56.66 54.81
5,562.69 02/10/22 57.25 55.40
5,563.11 06/28 /22 56.83 54.98
5,562.34 08/15 /22 57.60 55.75
5,562 .12 11/17/22 57.82 55 .97
5,562.62 03/24/23 57.32 55.47
5,562.24 06/26/23 57 .70 55.85
5,561.95 09 /28 /23 57.99 56.14
5,561.84 11/20 /23 58.10 56 .25
5,561.68 03/26/24 58.26 56.41
5,561.50 06/26/24 58.44 56.59
5,561.40 09/23/24 58.54 56.69
Water Levels and Data over Time
White Mesa Mill -Well TW 4-14
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,610.92 5,612.77 1.85 95.1
5,518.90 08/23/02 93.87 92.02
5,519.28 09/11/02 93.49 91.64
5,519.95 10/23/02 92.82 90.97
5,520.32 11/22/02 92.45 90.60
5,520.42 12/03/02 92.35 90.50
5,520.70 01/09/03 92.07 90.22
5,520.89 02/12/03 91.88 90.03
5,521.12 03/26/03 91.65 89.80
5,521.12 04/02/03 91.65 89.80
5,521.24 05/01/03 91.53 89.68
5,521.34 06/09/03 91.43 89.58
5,521.36 07/07/03 91.41 89.56
5,521.35 08/04/03 91.42 89.57
5,521.30 09/11/03 91.47 89.62
5,521.35 10/02/03 91.42 89.57
5,521.36 11/07/03 91.41 89.56
5,521.16 12/03/03 91.61 89.76
5,521.29 01/15/04 91.48 89.63
5,521.36 02/10/04 91.41 89.56
5,521.46 03/28/04 91.31 89.46
5,521.54 04/12/04 91.23 89.38
5,521.59 05/13/04 91.18 89.33
5,521.69 06/18/04 91.08 89.23
5,521.71 07/28/04 91.06 89.21
5,521.76 08/30/04 91.01 89.16
5,521.77 09/16/04 91.00 89.15
5,521.79 10/11/04 90.98 89.13
5,521.80 11/16/04 90.97 89.12
5,521.82 12/22/04 90.95 89.10
5,521.82 01/18/05 90.95 89.10
5,521.86 02/28/05 90.91 89.06
5,521.85 03/15/05 90.92 89.07
5,521.91 04/26/05 90.86 89.01
5,521.93 05/24/05 90.84 88.99
5,521.94 06/30/05 90.83 88.98
5,521.84 07/29/05 90.93 89.08
5,521.99 09/12/05 90.78 88.93
5,522.04 12/07/05 90.73 88.88
5,522.05 03/08/06 90.72 88.87
5,522.27 06/13/06 90.50 88.65
5,521.92 07/18/06 90.85 89.00
5,520.17 11/07/06 92.60 90.75
5,522.24 02/27/07 90.53 88.68
Water Levels and Data over Time
White Mesa Mill -Well TW 4-14
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,610.92 5,612.77 1.85 95.1
5,522.47 05/02/07 90.30 88.45
5,520.74 08/14/07 92.03 90.18
5,518.13 10/10/07 94.64 92.79
5,522.85 03/26/08 89.92 88.07
5,522.91 06/24/08 89.86 88.01
5,523.01 08/26/08 89.76 87.91
5,522.96 10/14/08 89.81 87.96
5,523.20 03/03/09 89.57 87.72
5,523.33 06/24/09 89.44 87.59
5,523.47 09/10/09 89.30 87.45
5,523.54 12/11/09 89.23 87.38
5,522.98 03/11/10 89.79 87.94
5,524.01 05/11/10 88.76 86.91
5,524.37 09/29/10 88.40 86.55
5,524.62 12/21/10 88.15 86.30
5,524.78 02/28/11 87.99 86.14
5,525.23 06/21/11 87.54 85.69
5,525.45 09/20/11 87.32 85.47
5,525.72 12/21/11 87.05 85.20
5,525.88 03/27/12 86.89 85.04
5,525.97 06/28/12 86.80 84.95
5,526.32 09/27/12 86.45 84.60
5,525.88 12/28/12 86.89 85.04
5,526.91 03/28/13 85.86 84.01
5,526.99 06/27/13 85.78 83.93
5,527.68 09/27/13 85.09 83.24
5,528.19 12/20/13 84.58 82.73
5,528.75 03/27/14 84.02 82.17
5,529.21 06/25/14 83.56 81.71
5,529.78 09/25/14 82.99 81.14
5,530.41 12/17/14 82.36 80.51
5,530.86 03/26/15 81.91 80.06
5,531.40 06/22/15 81.37 79.52
5,532.15 09/30/15 80.62 78.77
5,532.12 12/02/15 80.65 78.80
5,533.12 03/30/16 79.65 77.80
5,533.13 06/30/16 79.64 77.79
5,533.24 09/29/16 79.53 77.68
5,533.42 12/21/16 79.35 77.50
5,533.97 03/30/17 78.80 76.95
5,534.05 06/27/17 78.72 76.87
5,534.07 09/28/17 78.70 76.85
5,534.29 11/29/17 78.48 76.63
Water Levels and Data over Time
White Mesa Mill -Well TW 4-14
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,610.92 5,612.77 1.85 95.1
5,534.56 03/28/18 78.21 76.36
5,534.67 06/22/18 78.10 76.25
5,534.75 09/25/18 78.02 76.17
5,534.71 12/17/18 78.06 76.21
5,534.71 03/25/19 78.06 76.21
5,535.04 06/24/19 77.73 75.88
5,535.17 08/12/19 77.60 75.75
5,535.09 11/18/19 77.68 75.83
5,535.31 02/10/20 77.46 75.61
5,535.12 05/04/20 77.65 75.80
5,535.25 09/22/20 77.52 75.67
5,535.54 12/30/20 77.23 75.38
5,535.55 03/11/21 77.22 75.37
5,535.41 06/24/21 77.36 75.51
5,535.25 08/13/21 77.52 75.67
5,535.65 12/30/21 77.12 75.27
5,535.43 02/10/22 77.34 75.49
5,535.40 06/28/22 77.37 75.52
5,535.37 08/15/22 77.40 75.55
5,535.26 11/17/22 77.51 75.66
5,535.62 03/24/23 77.15 75.3
5,535.43 06/26/23 77.34 75.49
5,535.41 09/28/23 77.36 75.51
5,535.36 11/20/23 77.41 75.56
5,535.25 03/26/24 77.52 75.67
5,535.11 06/26/24 77.66 75.81
5,535.16 09/23/24 77.61 75.76
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Water Levels and Data over Time
White Mesa Mill -Well MW-26
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,624.15 5,625.45 1.30 121.33
5,574.75 08/23/02 50.70 49.40
5,574.97 09/11/02 50.48 49.18
5,575.10 10/23/02 50.35 49.05
5,574.99 11/22/02 50.46 49.16
5,575.28 12/03/02 50.17 48.87
5,575.41 01/09/03 50.04 48.74
5,575.43 02/12/03 50.02 48.72
5,575.63 03/26/03 49.82 48.52
5,575.91 04/02/03 49.54 48.24
5,575.81 05/01/03 49.64 48.34
5,572.36 06/09/03 53.09 51.79
5,570.70 07/07/03 54.75 53.45
5,570.29 08/04/03 55.16 53.86
5,560.94 09/11/03 64.51 63.21
5,560.63 10/02/03 64.82 63.52
5,560.56 11/07/03 64.89 63.59
5,564.77 12/03/03 60.68 59.38
5,570.89 01/15/04 54.56 53.26
5,572.55 02/10/04 52.90 51.60
5,574.25 03/28/04 51.20 49.90
5,574.77 04/12/04 50.68 49.38
5,575.53 05/13/04 49.92 48.62
5,575.59 06/18/04 49.86 48.56
5,576.82 07/28/04 48.63 47.33
5,527.47 09/16/04 97.98 96.68
5,553.97 11/16/04 71.48 70.18
5,562.33 12/22/04-63.12 61.82
5,550.00 01/18/05 75.45 74.15
5,560.02 04/26/05 65.43 64.13
5,546.11 05/24/05 79.34 78.04
5,556.71 06/30/05 68.74 67.44
5,554.95 07/29/05 70.50 69.20
5,555.48 09/12/05 69.97 68.67
5,551.09 12/07/05 74.36 73.06
5,552.85 03/08/06 72.60 71.30
5,554.30 06/13/06 71.15 69.85
5,554.87 07/18/06 70.58 69.28
5,550.88 11/07/06 74.57 73.27
5,558.77 02/27/07 66.68 65.38
5,548.54 05/02/07 76.91 75.61
5,551.33 10/10/07 74.12 72.82
5,545.56 03/26/08 79.89 78.59
5,545.56 06/25/08 79.89 78.59
Water Levels and Data over Time
White Mesa Mill -Well MW-26
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,624.15 5,625.45 1.30 121.33
5,545.82 08/26/08 79.63 78.33
5,545.64 10/14/08 79.81 78.51
5,544.45 03/03/09 81.00 79.70
5,545.32 06/24/09 80.13 78.83
5,544.61 09/10/09 80.84 79.54
5,549.33 12/11/09 76.12 74.82
5,543.78 03/11/10 81.67 80.37
5,545.61 05/11/10 79.84 78.54
5,547.43 09/29/10 78.02 76.72
5,544.14 12/21/10 81.31 80.01
5,546.77 02/28/11 78.68 77.38
5,537.60 06/21/11 87.85 86.55
5,551.46 09/20/11 73.99 72.69
5,549.12 12/21/11 76.33 75.03
5,557.30 03/27/12 68.15 66.85
5,557.38 06/28/12 68.07 66.77
5,550.86 09/27/12 74.59 73.29
5,557.30 12/28/12 68.15 66.85
5,565.37 03/28/13 60.08 58.78
5,563.55 06/27/13 61.90 60.60
5,560.12 09/27/13 65.33 64.03
5,559.27 12/20/13 66.18 64.88
5,556.65 03/27/14 68.80 67.50
5,552.23 06/25/14 73.22 71.92
5,554.05 09/25/14 71.40 70.10
5,550.65 12/17/14 74.80 73.50
5,557.55 03/26/15 67.90 66.60
5,558.51 06/22/15 66.94 65.64
5,560.81 09/30/15 64.64 63.34
5,560.25 12/02/15 65.20 63.90
5,561.07 03/30/16 64.38 63.08
5,560.51 06/30/16 64.94 63.64
5,557.99 09/29/16 67.46 66.16
5,561.26 12/21/16 64.19 62.89
5,559.85 03/30/17 65.60 64.30
5,559.35 06/27/17 66.10 64.80
5,553.30 09/28/17 72.15 70.85
5,557.38 11/30/17 68.07 66.77
5,543.85 03/28/18 81.60 80.30
5,553.27 06/22/18 72.18 70.88
5,547.57 09/24/18 77.88 76.58
5,547.63 12/20/18 77.82 76.52
5,545.54 03/25/19 79.91 78.61
Water Levels and Data over Time
White Mesa Mill -Well MW-26
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,624.15 5,625.45 1.30 121.33
5,547.27 06/24/19 78.18 76.88
5,549.07 08/12/19 76.38 75.08
5,549.15 11/18/19 76.30 75.00
5,552.38 02/13/20 73.07 71.77
5,539.82 05/04/20 85.63 84.33
5,545.34 09/21/20 80.11 78.81
5,551.33 12/28/20 74.12 72.82
5,551.37 03/11/21 74.08 72.78
5,539.74 06/24/21 85.71 84.41
5,550.05 08/11/21 75.40 74.10
5,539.30 12/30/21 86.15 84.85
5,549.04 02/10/22 76.41 75.11
5,542.23 06/28/22 83.22 81.92
5,551.32 08/15/22 74.13 72.83
5,541.16 11/17/22 84.29 82.99
5,541.12 03/24/23 84.33 83.03
5,536.93 06/27/23 88.52 87.22
5,551.32 09/25/23 74.13 72.83
5,548.70 11/21/23 76.75 75.45
5,540.18 03/25/24 85.27 83.97
5,541.68 06/26/24 83.77 82.47
5,550.25 09/25/24 75.20 73.9
Water Levels and Data over Time
White Mesa Mill-Well TW4-16
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,625.28 5,628.65 3.37 147.6
5,562.91 08/23/02 61.11 57.74
5,563.45 09/11/02 60.57 57.20
5,563.75 10/23/02 60.27 56.90
5,563.68 11/22/02 60.34 56.97
5,563.68 12/03/02 60.34 56.97
5,564.16 01/09/03 59.86 56.49
5,564.25 02/12/03 59.77 56.40
5,564.53 03/26/03 59.49 56.12
5,564.46 04/02/03 59.56 56.19
5,564.79 05/01/03 59.23 55.86
5,564.31 06/09/03 59.71 56.34
5,563.29 07/07/03 60.73 57.36
5,562.76 08/04/03 61.26 57.89
5,561.73 09/11/03 62.29 58.92
5,561.04 10/02/03 62.98 59.61
5,560.39 11/07/03 63.63 60.26
5,559.79 12/03/03 64.23 60.86
5,561.02 01/15/04 63.00 59.63
5,561.75 02/10/04 62.27 58.90
5,562.98 03/28/04 61.04 57.67
5,563.29 04/12/04 60.73 57.36
5,564.03 05/13/04 59.99 56.62
5,564.09 06/18/04 59.93 56.56
5,565.08 07/28/04 58.94 55.57
5,564.56 08/30/04 59.46 56.09
5,563.55 09/16/04 60.47 57.10
5,561.79 10/11/04 62.23 58.86
5,560.38 11/16/04 63.64 60.27
5,559.71 12/22/04 64.31 60.94
5,559.14 01/18/05 64.88 61.51
5,558.65 02/28/05 65.37 62.00
5,558.54 03/15/05 65.48 62.11
5,558.22 04/26/05 65.80 62.43
5,558.54 05/24/05 65.48 62.11
5,559.24 06/30/05 64.78 61.41
5,559.38 07/29/05 64.64 61.27
5,559.23 09/12/05 64.79 61.42
5,557.67 12/07/05 66.35 62.98
5,557.92 03/08/06 66.10 62.73
5,558.47 06/13/06 65.55 62.18
5,558.42 07/18/06 65.60 62.23
5,558.09 11/07/06 65.93 62.56
5,557.34 02/27/07 66.68 63.31
Water Levels and Data over Time
White Mesa Mill-Well TW4-16
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitorin~ (blw.MP) (blw.LSD) Well
5,625.28 5,628.65 3.37 147.6
5,547 .11 05/02/07 76.91 73.54
5,558.52 08/14/07 65.50 62.13
5,559.02 10/10/07 65.00 61.63
5,561.04 03/26/08 62.98 59.61
5,560.06 06/24/08 63.96 60.59
5,559.32 08/26/08 64.70 61.33
5,558.89 10/14/08 65.13 61.76
5,558.40 03/03/09 65.62 62.25
5,558.32 06/24/09 65.70 62.33
5,558.03 09/10/09 65.99 62.62
5,558.81 12/11/09 65.21 61.84
5,559.80 03/11/10 64.22 60.85
5,559.85 05/11/10 64.17 60.80
5,560.54 09/29/10 63.48 60.11
5,558.65 12/21/10 65.37 62.00
5,559.26 02/28/11 64.76 61.39
5,560.48 06/21/11 63.54 60.17
5,561.52 09/20/11 62.50 59.13
5,562.95 12/21/11 61.07 57.70
5,563.76 03/27/12 60.26 56.89
5,563.90 06/28/12 60.12 56.75
5,564.65 09/27/12 59.37 56.00
5,563.77 12/28/12 60.25 56.88
5,564.74 03/28/13 59.28 55.91
5,563.66 06/27/13 60.36 56.99
5,562.27 09/27/13 61.75 58.38
5,562.17 12/20/13 61.85 58.48
5,561.17 03/27/14 62.85 59.48
5,559.53 06/25/14 64.49 61.l2
5,558.36 09/25/14 65.66 62.29
5,558.00 12/17/14 66.02 62.65
5,559.02 03/26/15 65.00 61.63
5,560.62 06/22/15 63.40 60.03
5,560.62 09/30/15 63.40 60.03
5,560.85 12/02/15 63.17 59.80
5,560.92 03/30/16 63.10 59.73
5,559.95 06/30/16 64.07 60.70
5,559.72 09/29/16 64.30 60.93
5,559.71 12/21/16 64.31 60.94
5,559.53 03/30/17 64.49 61.12
5,569.02 06/27/17 59.63 56.26
5,558.97 09/28/17 69.68 66.31
5,558.51 11/30/17 70.14 66.77
Water Levels and Data over Time
White Mesa Mill-Well TW4-16
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
S,62S.28 5,628.6S 3.37 147.6
5,558.00 03/29/18 70.6S 67 .28
S,557.94 06/22/18 70.71 67.34
S,S57.67 09/25/18 70.98 67.61
5,557.66 12/17/18 70.99 67.62
5,548.49 03/25/19 80.16 76.79
5,556.98 06/24/19 71.67 68.30
5,556.83 08/12/19 71.82 68.45
5,556.90 11/18/19 71.75 68.38
5,556.65 02/10/20 72.00 68.63
5,556.25 05/04/20 72.40 69.03
5,555 .53 09/22/20 73 .12 69.75
5,555.37 12/30/20 73.28 69.91
5,555.38 03/11/21 73.27 69.9
5,554.94 06/24/21 73.71 70.34
5,554.95 08/13/21 73.70 70.33
5,555.23 12/30/21 73.42 70.05
5,554.68 02/10/22 73.97 70.60
5,554.93 06/28/22 73.72 70.35
5,554.47 08/15/22 74.18 70.81
5,554.26 11/17/22 74.39 71.02
5,553.79 03/24/23 74.86 71.49
5,553.80 06/26/23 74.85 71.48
5,553.75 09/28/23 74.90 71.53
5,553.75 11/20/23 74.9 71.53
5,553.70 03/26/24 74.95 71.58
5,553.60 06/26/24 75.05 71.68
5,553.62 09/23/24 75.03 71.66
Water Levels and Data over Time
White Mesa Mill -Well MW-32
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,623.41 5,625.24 1.83 130.6
5,542.17 08/23/02 83.07 81.24
5,542.39 09/11/02 82.85 81.02
5,542.61 10/23/02 82.63 80.80
5,542.49 11/22/02 82.75 80.92
5,542.82 12/03/02 82.42 80.59
5,543.03 01/09/03 82.21 80.38
5,543.04 02/12/03 82.20 80.37
5,543.41 03/26/03 81.83 80.00
5,543.69 04/02/03 81.55 79.72
5,543.77 05/01/03 81.47 79.64
5,544.01 06/09/03 81.23 79.40
5,544.05 07/07/03 81.19 79.36
5,543.99 08/04/03 81.25 79.42
5,544.17 09/11/03 81.07 79.24
5,544.06 10/02/03 81.18 79.35
5,544.03 11/07/03 81.21 79.38
5,543.94 12/03/03 81.30 79.47
5,543.98 01/15/04 81.26 79.43
5,543.85 02/10/04 81.39 79.56
5,544.05 03/28/04 81.19 79.36
5,544.33 04/12/04 80.91 79.08
5,544.55 05/13/04 80.69 78.86
5,544.59 06/18/04 80.65 78.82
5,545.08 07/28/04 80.16 78.33
5,545.26 08/30/04 79.98 78.15
5,545.48 09/16/04 79.76 77.93
5,545.61 10/11/04 79.63 77.80
5,545.46 11/16/04 79.78 77.95
5,545.66 12/22/04 79.58 77.75
5,545.33 01/18/05 79.91 78.08
5,545.51 02/28/05 79.73 77.90
5,545.57 03/15/05 79.67 77.84
5,545.46 04/26/05 79.78 77.95
5,545.45 05/24/05 79.79 77.96
5,545.33 06/30/05 79.91 78.08
5,545.16 07/29/05 80.08 78.25
5,545.54 09/12/05 79.70 77.87
5,545.77 12/07/05 79.47 77.64
5,546.09 03/08/06 79.15 77.32
5,545.94 06/13/06 79.30 77.47
5,545.94 07/18/06 79.30 77.47
5,546.24 11/07/06 79.00 77.17
5,546.81 02/27/07 78.43 76.60
Water Levels and Data over Time
White Mesa Mill-Well MW-32
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,623.41 5,625.24 1.83 130.6
5,546.56 05/02/07 78.68 76.85
5,546.81 08/15/07 78.43 76.6
5,546.96 10/10/07 78.28 76.45
5,547.90 03/26/08 77.34 75.51
5,548.08 06/25/08 77.16 75.33
5,548.42 08/26/08 76.82 74.99
5,548.05 10/14/08 77.19 75.36
5,548.29 03/03/09 76.95 75.12
5,548.09 06/24/09 77.15 75.32
5,547.79 09/10/09 77.45 75.62
5,548.09 12/11/09 77.15 75.32
5,548.50 03/11/10 76.74 74.91
5,548.89 05/11/10 76.35 74.52
5,548.83 09/29/10 76.41 74.58
5,548.97 12/21/10 76.27 74.44
5,548.68 02/28/11 76.56 74.73
5,549.33 06/21/11 75.91 74.08
5,549.19 09/20/11 76.05 74.22
5,550.06 12/21/11 75.18 73.35
5,550.31 03/27/12 74.93 73.10
5,550.32 06/28/12 74.92 73.09
5,550.88 09/27/12 74.36 72.53
5,550.29 12/28/12 74.95 73.12
5,551.54 03/28/13 73.70 71.87
5,550.34 06/27/13 74.90 73.07
5,551.35 09/27/13 73.89 72.06
5,551.33 12/20/13 73.91 72.08
5,550.97 03/27/14 74.27 72.44
5,550.16 06/25/14 75.08 73.25
5,549.29 09/25/14 75.95 74.12
5,548.99 12/17/14 76.25 74.42
5,548.24 03/26/15 77.00 75.17
5,548.29 06/22/15 76.95 75.12
5,548.33 09/30/15 76.91 75.08
5,547.98 12/02/15 77.26 75.43
5,548.24 03/30/16 77.00 75.17
5,547.68 06/30/16 77.56 75.73
5,547.29 09/29/16 77.95 76.12
5,547.09 12/21/16 78.15 76.32
5,547.34 03/30/17 77.90 76.07
5,546.94 06/27/17 78.30 76.47
5,546.59 09/28/17 78.65 76.82
5,546.32 11/30/17 78.92 77.09
Water Levels and Data over Time
White Mesa Mill -Well MW-32
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) {LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,623.41 5,625.24 1.83 130.6
5,546.19 03/29/18 79.05 77.22
5,545.99 06/22/18 79.25 77.42
5,545.57 09/26/18 79.67 77.84
5,545.56 12/17/18 79.68 77.85
5,545.08 03/26/19 80.16 78.33
5,544.99 06/24/19 80.25 78.42
5,544.87 08/12/19 80.37 78.54
5,544.70 11/19/19 80.54 78.71
5,544.57 02/13/20 80.67 78.84
5,544.99 05/05/20 80.25 78.42
5,543.69 09/22/20 81.55 79.72
5,543.67 12/30/20 81.57 79.74
5,543.64 03/11/21 81.60 79.77
5,543.20 06/24/21 82.04 80.21
5,543.06 08/11/21 82.18 80.35
5,543.37 12/30/21 81.87 80.04
5,542.66 02/10/22 82.58 80.75
5,542.36 06/28/22 82.88 81.05
5,542.44 08/15/22 82.80 80.97
5,542.31 11/17/22 82.93 81.10
5,542.38 03/24/23 82.86 81.03
5,542.39 06/27/23 82.85 81.02
5,541.79 09/28/23 83.45 81.62
5,541.46 11/21/23 83.78 81.95
5,541.63 03/26/24 83.61 81.78
5,543.37 06/26/24 81.87 80.04
5,541.37 09/25/24 83.87 82.04
Depth Below Measuring Point (ft.)
00 00 00 00 -.J -.J -.J -.J -.J 0\
0\ .i::,. N 0 00 0\ .i::,. N 0 00
08/23/02
08/23/03
08/23/04
08/23/05
08/23/06
08/23/07
08/23/08 ~
08/23/09 ~
CH
N
08/23/10 ~ 08/23/11 ......
~
""S
08/23/12 ~
~
"'C
08/23/13 ...... =-
0
08/23/14 < ~
""S
08/23/15 ~ -· a
08/23/16 ~ -?
08/23/17 O"' -
08/23/18 a
"'C -
08/23/19
08/23/20
08/23/21
08/23/22
08/23/23
08/23/24
Water Levels and Data over Time
White Mesa Mill-Well TW4-18
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,639.13 5,641.28 2.15 136.9
5,585.13 08/23/02 56.15 54.00
5,585.41 09/11/02 55.87 53.72
5,585.47 10/23/02 55.81 53.66
5,585.40 11/22/02 55.88 53.73
5,585.68 12/03/02 55.60 53.45
5,585.90 01/09/03 55.38 53.23
5,590.79 02/12/03 50.49 48.34
5,586.18 03/26/03 55.10 52.95
5,586.36 04/02/03 54.92 52.77
5,586.24 05/01/03 55.04 52.89
5,584.93 06/09/03 56.35 54.20
5,584.46 07/07/03 56.82 54.67
5,584.55 08/04/03 56.73 54.58
5,584.01 09/11/03 57.27 55.12
5,583.67 10/02/03 57.61 55.46
5,583.50 11/07/03 57.78 55.63
5,584.08 12/03/03 57.20 55.05
5,585.45 01/15/04 55.83 53.68
5,585.66 02/10/04 55.62 53.47
5,586.13 03/28/04 55.15 53.00
5,586.39 04/12/04 54.89 52.74
5,586.66 05/13/04 54.62 52.47
5,586.77 06/18/04 54.51 52.36
5,587.35 07/28/04 53.93 51.78
5,586.34 08/30/04 54.94 52.79
5,585.85 09/16/04 55.43 53.28
5,585.22 10/11/04 56.06 53.91
5,584.70 11/16/04 56.58 54.43
5,584.81 12/22/04 56.47 54.32
5,584.68 01/18/05 56.60 54.45
5,585.02 02/28/05 56.26 54.11
5,585.25 03/15/05 56.03 53.88
5,586.31 04/26/05 54.97 52.82
5,586.97 05/24/05 54.31 52.16
5,586.58 06/30/05 54.70 52.55
5,586.10 07/29/05 55.18 53.03
5,586.05 09/12/05 55.23 53.08
5,585.86 12/07/05 55.42 53.27
5,587.13 03/08/06 54.15 52.00
5,585.93 06/13/06 55.35 53.20
5,585.40 07/18/06 55.88 53.73
5,585.38 11/07/06 55.90 53.75
5,585.83 02/27/07 55.45 53.30
Water Levels and Data over Time
White Mesa Mill -Well TW 4-18
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,639.13 5,641.28 2.15 136.9
5,585.15 05/02/07 56.13 53.98
5,586.47 06/24/08 54.81 52.66
5,586.30 08/26/08 54.98 52.83
5,585.21 10/14/08 56.07 53.92
5,584.47 03/03/09 56.81 54.66
5,584.35 06/24/09 56.93 54.78
5,583.88 09/10/09 57.40 55.25
5,584.43 12/11/09 56.85 54.70
5,585.26 03/11/10 56.02 53.87
5,584.17 05/11/10 57.11 54.96
5,583.61 09/29/10 57.67 55.52
5,604.29 12/21/10 36.99 34.84
5,583.56 02/28/11 57.72 55.57
5,584.73 06/21/11 56.55 54.40
5,584.71 09/20/11 56.57 54.42
5,585.03 12/21/11 56.25 54.10
5,584.63 03/27/12 56.65 54.50
5,584.67 06/28/12 56.61 54.46
5,583.98 09/27/12 57.30 55.15
5,584.65 12/28/12 56.63 54.48
5,582.88 03/28/13 58.40 56.25
5,584.63 06/27/13 56.65 54.50
5,581.38 09/27/13 59.90 57.75
5,579.71 12/20/13 61.57 59.42
5,579.26 03/27/14 62.02 59.87
5,577.73 06/25/14 63.55 61.40
5,576.79 09/25/14 64.49 62.34
5,577.11 12/17/14 64.17 62.02
5,577.18 03/26/15 64.10 61.95
5,577.13 06/22/15 64.15 62.00
5,576.63 09/30/15 64.65 62.50
5,576.20 12/02/15 65.08 62.93
5,576.05 03/30/16 65.23 63.08
5,575.35 06/30/16 65.93 63.78
5,575.02 09/29/16 66.26 64.11
5,574.34 12/21/16 66.94 64.79
5,574.73 03/30/17 66.55 64.40
5,574.13 06/27/17 67.15 65.00
5,573.51 09/28/17 67.77 65.62
5,572.93 11/29/17 68.35 66.20
5,572.51 03/29/18 68.77 66.62
5,572.28 06/22/18 69.00 66.85
5,571.72 09/26/18 69.56 67.41
Water Levels and Data over Time
White Mesa Mill -Well TW 4-18
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,639.13 5,641.28 2.15 136.9
5,571.45 12/17/18 69.83 67.68
5,570.86 03/26/19 70.42 68.27
5,570.60 06/24/19 70.68 68.53
5,570.53 08/12/19 70.75 68.60
5,570.39 11/19/19 70.89 68.74
5,570.03 02/10/20 71.25 69.10
5,569.68 05/04/20 71.60 69.45
5,568.90 09/22/20 72.38 70.23
5,568.70 12/30/20 72.58 70.43
5,568.73 03/11/21 72.55 70.40
5,568.28 06/24/21 73.00 70.85
5,568.17 08/13/21 73.11 70.96
5,568.41 12/30/21 72.87 70.72
5,567.75 02/10/22 73.53 71.38
5,567.34 06/28/22 73.94 71.79
5,567.35 08/15/22 73.93 71.78
5,567.22 11/17/22 74.06 71.91
5,566.81 03/24/23 74.47 72.32
5,566.79 06/26/23 74.49 72.34
5,566.76 09/28/23 74.52 72.37
5,566.83 11/20/23 74.45 72.30
5,566.81 03/26/24 74.47 72.32
5,566.26 06/26/24 75.02 72.87
5,566.07 09/23/24 75.21 73.06
Water Levels and Data over Time
White Mesa Mill -Well TW 4-19
Total or
Measuring Measured
Water Land Point Depth to Total Depth
Elevation Surface Elevation Length Of Date Of Water to Water Total Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,629.53 5,631.39 1.86 126.86
5,581.88 08/23/02 49.51 47.65
5,582.14 09/11/02 49.25 47.39
5,582.06 10/23/02 49.33 47.47
5,582.07 11/22/02 49.32 47.46
5,582.16 12/03/02 49.23 47.37
5,582.28 01/09/03 49.11 47.25
5,582.29 02/21/03 49.10 47.24
5,582.74 03/26/03 48.65 46.79
5,582.82 04/02/03 48.57 46.71
5,548.47 05/01/03 82.92 81.06
5,564.76 06/09/03 66.63 64.77
5,562.53 07/07/03 68.86 67.00
5,564.10 08/04/03 67.29 65.43
5,566.01 08/30/04 65.38 63.52
5,555.16 09/16/04 76.23 74.37
5,549.80 10/11/04 81.59 79.73
5,546.04 11/16/04 85.35 83.49
5,547.34 12/22/04 84.05 82.19
5,548.77 01/18/05 82.62 80.76
5,551.18 02/28/05 80.21 78.35
5,556.81 03/15/05 74.58 72.72
5,562.63 04/26/05 68.76 66.90
5,573.42 05/24/05 57.97 56.11
5,552.94 07/29/05 78.45 76.59
5,554.00 09/12/05 77.39 75.53
5,555.98 12/07/05 75.41 73.55
5,552.00 03/08/06 79.39 77.53
5,545.74 06/13/06 85.65 83.79
5,544.06 07/18/06 87.33 85.47
5,548.81 11/07/06 82.58 80.72
5,543.59 02/27/07 87.80 85.94
5,544.55 05/02/07 86.84 84.98
5,558.97 08/15/07 72.42 70.56
5,559.73 10/10/07 71.66 69.8
5,569.26 03/26/08 62.13 60.27
5,535.47 06/25/08 95.92 94.06
5,541.41 08/26/08 89.98 88.12
5,558.45 10/14/08 72.94 71.08
5,536.90 03/03/09 94.49 92.63
5,547.76 06/24/09 83.63 81.77
5,561.48 09/10/09 69.91 68.05
5,548.14 12/11/09 83.25 81.39
5,570.58 03/11/10 60.81 58.95
Water Levels and Data over Time
White Mesa Mill -Well TW 4-19
Total or
Measuring Measured
Water Land Point Depth to Total Depth
Elevation Surface Elevation Length Of Date Of Water to Water Total Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,629.53 5,631.39 1.86 126.86
5,561.35 05/11/10 70.04 68.18
5,535.26 09/29/10 96.13 94.27
5,568.40 12/21/10 62.99 61.13
5,550.36 02/28/11 81.03 79.17
5,570.41 06/21/11 60.98 59.12
5,567.84 09/20/11 63.55 61.69
5,571.32 12/21/11 60.07 58.21
5,572.40 03/27/12 58.99 57.13
5,572.39 06/28/12 59.00 57.14
5,571.40 09/27/12 59.99 58.13
5,568.21 12/28/12 63.18 61.32
5,572.51 03/28/13 58.88 57.02
5,566.00 06/27/13 65.39 63.53
5,568.37 09/27/13 63.02 61.16
5,564.55 12/20/13 66.84 64.98
5,565.11 03/27/14 66.28 64.42
5,561.49 06/25/14 69.90 68.04
5,562.67 09/25/14 68.72 66.86
5,562.99 12/17/14 68.40 66.54
5,567.99 03/26/15 63.40 61.54
5,562.79 06/22/15 68.60 66.74
5,568.16 09/30/15 63.23 61.37
5,567.51 12/02/15 63.88 62.02
5,566.38 03/30/16 65.01 63.15
5,566.91 06/30/16 64.48 62.62
5,567.38 09/29/16 64.01 62.15
5,567.41 12/21/16 63.98 62.12
5,566.87 03/30/17 64.52 62.66
5,566.76 06/27/17 64.63 62.77
5,565.19 09/28/17 66.20 64.34
5,565.79 11/30/17 65.60 63.74
5,563.79 03/28/18 67.60 65.74
5,564.58 06/22/18 66.81 64.95
5,562.56 09/24/18 68.83 66.97
5,555.78 12/18/18 75.61 73.75
5,547.86 03/25/19 83.53 81.67
5,557.99 06/24/19 73.40 71.54
5,554.26 08/12/19 77.13 75.27
5,561.87 11/18/19 69.52 67.66
5,561.71 02/10/20 69.68 67.82
5,563.21 05/04/20 68.18 66.32
5,559.19 09/21/20 72.20 70.34
5,554.95 12/28/20 76.44 74.58
Water Levels and Data over Time
White Mesa Mill-Well TW4-19
Total or
Measuring Measured
Water Land Point Depth to Total Depth
Elevation Surface Elevation Length Of Date Of Water to Water Total Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,629.53 5,631.39 1.86 126.86
5,558.24 03/11/21 73.15 71.29
5,559.02 06/24/21 72.37 70.51
5,557.99 08/13/21 73.40 71.54
5,559.25 12/30/21 72.14 70.28
5,560.12 02/10/22 71.27 69.41
5,559.22 06/28/22 72.17 70.31
5,557.94 08/15/22 73.45 71.59
5,559.35 11/17/22 72.04 70.18
5,557.32 03/24/23 74.07 72.21
5,561.29 06/26/23 70.10 68.24
5,559.21 09/25/23 72.18 70.32
5,544.73 11/20/23 86.66 84.80
5,557.41 03/25/24 73.98 72.12
5,556.50 06/26/24 74.89 73.03
5,558.24 09/23/24 73.15 71.29
Water Levels and Data over Time
White Mesa Mill-Well TW4-21
Total or
Measuring Measured Total
Water Land Point Date Of Depth to Depth to Total
Elevation Surface Elevation Length Of Monitoring Water Water Depth Of
(WL) (LSD) (MP) Riser (L) (blw.MP) (blw.LSD) Well
5,638.20 5,639.35 1.15 118.8
5,582.98 07/29/05 56.37 55.22
5,583.43 08/30/05 55.92 54.77
5,581.87 09/12/05 57.48 56.33
5,580.50 12/07/05 58.85 57.70
5,583.64 03/08/06 55.71 54.56
5,580.55 06/13/06 58.80 57.65
5,578.95 07/18/06 60.40 59.25
5,578.47 11/07/06 60.88 59.73
5,579.53 02/27/07 59.82 58.67
5,578.07 05/02/07 61.28 60.13
5,583.41 08/15/07 55.94 54.79
5,583.45 10/10/07 55.90 54.75
5,586.47 03/26/08 52.88 51.73
5,579.16 06/24/08 60.19 59.04
5,579.92 08/26/08 59.43 58.28
5,577.37 10/14/08 61.98 60.83
5,578.00 03/10/09 61.35 60.20
5,580.14 06/24/09 59.21 58.06
5,578.72 09/10/09 60.63 59.48
5,579.99 12/11/09 59.36 58.21
5,582.81 03/11/10 56.54 55.39
5,582.23 05/11/10 57.12 55.97
5,576.60 09/29/10 62.75 61.60
5,581.14 12/21/10 58.21 57.06
5,579.53 02/28/11 59.82 58.67
5,584.17 06/21/11 55.18 54.03
5,584.80 09/20/11 54.55 53.40
5,585.68 12/21/11 53.67 52.52
5,585.24 03/27/12 54.11 52.96
5,585.26 06/28/12 54.09 52.94
5,585.16 09/27/12 54.19 53.04
5,585.25 12/28/12 54.10 52.95
5,582.84 03/28/13 56.51 55.36
5,581.79 06/27/13 57.56 56.41
5,580.89 09/27/13 58.46 57.31
5,577.45 12/20/13 61.90 60.75
5,576.01 03/27/14 63.34 62.19
5,574.08 06/25/14 65.27 64.12
5,573.20 09/25/14 66.15 65.00
5,576.13 12/17/14 63.22 62.07
5,578.19 03/26/15 61.16 60.01
5,574.85 06/22/15 64.50 63.35
Water Levels and Data over Time
White Mesa Mill-Well TW4-21
Total or
Measuring Measured Total
Water Land Point Date Of Depth to Depth to Total
Elevation Surface Elevation Length Of Monitoring Water Water Depth Of
(WL) (LSD) (MP) Riser (L) (blw.MP) (blw.LSD) Well
5,638.20 5,639.35 1.15 118.8
5,573.05 09/30/15 66.30 65.15
5,569.88 12/02/15 69.47 68.32
5,571.81 03/30/16 67.54 66.39
5,571.86 06/30/16 67.49 66.34
5,570.82 09/29/16 68.53 67.38
5,570.45 12/21/16 68.90 67.75
5,574.53 03/30/17 64.82 63.67
5,569.91 06/27/17 69.44 68.29
5,569.49 09/28/17 69.86 68.71
5,566.87 11/30/17 72.48 71.33
5,568.10 03/28/18 71.25 70.10
5,568.17 06/22/18 71.18 70.03
5,567.50 09/24/18 71.85 70.70
5,554.80 12/17/18 84.55 83.40
5,560.92 03/25/19 78.43 77.28
5,561.49 06/24/19 77.86 76.71
5,564.17 08/12/19 75.18 74.03
5,555.91 11/18/19 83.44 82.29
5,561.05 02/10/20 78.30 77.15
5,567.23 05/04/20 72.12 70.97
5,566.29 09/21/20 73.06 71.91
5,562.48 12/28/20 76.87 75.72
5,568.64 03/11/21 70.71 69.56
5,564.50 06/24/21 74.85 73.70
5,567.02 08/13/21 72.33 71.18
5,563.30 12/30/21 76.05 74.90
5,567.61 02/10/22 71.74 70.59
5,567.20 06/28/22 72.15 71.00
5,563.51 08/15/22 75.84 74.69
5,567.10 11/17/22 72.25 71.10
5,562.38 03/24/23 76.97 75.82
5,561.05 06/26/23 78.30 77.15
5,567.18 09/25/23 72.17 71.02
5,562.49 11/20/23 76.86 75.71
5,564.47 03/25/24 74.88 73.73
5,563.00 06/26/24 76.35 75.20
5,563.17 09/23/24 76.18 75.03
Water Levels and Data over Time
White Mesa Mill-Well TW4-22
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,627.83 5,629.00 1.17 114.7
5,571.89 07/29/05 57.11 55.94
5,572.20 08/30/05 56.80 55.63
5,572.08 09/12/05 56.92 55.75
5,571.61 12/07/05 57.39 56.22
5,571.85 03/08/06 57.15 55.98
5,571.62 06/13/06 57.38 56.21
5,571.42 07/18/06 57.58 56.41
5,571.02 11/07/06 57.98 56.81
5,571.24 02/27/07 57.76 56.59
5,570.75 06/29/07 58.25 57.08
5,571.82 08/14/07 57.18 56.01
5,571.99 10/10/07 57.01 55.84
5,573.05 03/26/08 55.95 54.78
5,573.04 06/24/08 55.96 54.79
5,573.04 08/26/08 55.96 54.79
5,573.02 10/14/08 55.98 54.81
5,573.19 03/10/09 55.81 54.64
5,573.32 06/24/09 55.68 54.51
5,573.17 09/10/09 55.83 54.66
5,573.52 12/11/09 55.48 54.31
5,573.88 03/11/10 55.12 53.95
5,574.29 05/11/10 54.71 53.54
5,574.88 09/29/10 54.12 52.95
5,574.44 12/21/10 54.56 53.39
5,574.49 02/28/11 54.51 53.34
5,574.97 06/21/11 54.03 52.86
5,575.06 09/20/11 53.94 52.77
5,575.69 12/21/11 53.31 52.14
5,575.61 03/27/12 53.39 52.22
5,575.62 06/28/12 53.38 52.21
5,575.90 09/27/12 53.10 51.93
5,575.59 12/28/12 53.41 52.24
5,573.50 03/28/13 55.50 54.33
5,572.45 06/27/13 56.55 55.38
5,572.25 09/27/13 56.75 55.58
5,569.93 12/20/13 59.07 57.90
5,569.36 03/27/14 59.64 58.47
5,569.02 06/25/14 59.98 58.81
5,570.00 09/25/14 59.00 57.83
5,568.60 12/17/14 60.40 59.23
5,557.00 03/26/15 72.00 70.83
5,570.93 06/22/15 58.07 56.90
Water Levels and Data over Time
White Mesa Mill -Well TW 4-22
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,627.83 5,629.00 1.17 114.7
5,571.24 09/30/15 57.76 56.59
5,568.23 12/02/15 60.77 59.60
5,570.28 03/30/16 58.72 57.55
5,570.75 06/30/16 58.25 57.08
5,544.60 09/29/16 84.40 83.23
5,565.11 12/21/16 63.89 62.72
5,567.99 03/30/17 61.01 59.84
5,569.17 06/27/17 59.83 58.66
5,569.37 09/28/17 59.63 58.46
5,566.48 11/30/17 62.52 61.35
5,568.30 03/28/18 60.70 59.53
5,568.42 06/22/18 60.58 59.41
5,567.98 09/24/18 61.02 59.85
5,553.65 12/17/18 75.35 74.18
5,550.09 03/25/19 78.91 77.74
5,540.65 06/24/19 88.35 87.18
5,557.09 08/12/19 71.91 70.74
5,544.97 11/18/19 84.03 82.86
5,558.05 02/10/20 70.95 69.78
5,558.77 05/04/20 70.23 69.06
5,559.12 09/21/20 69.88 68.71
5,564.70 12/28/20 64.30 63.13
5,560.19 03/11/21 68.81 67.64
5,560.12 06/24/21 68.88 67.71
5,560.80 08/13/21 68.20 67.03
5,562.87 12/30/21 66.13 64.96
5,559.35 02/10/22 69.65 68.48
5,559.49 06/28/22 69.51 68.34
5,548.25 08/15/22 80.75 79.58
5,558.30 11/17/22 70.70 69.53
5,559.30 03/24/23 69.70 68.53
5,560.71 06/26/23 68.29 67.12
5,558.81 09/25/23 70.19 69.02
5,560.55 11/20/23 68.45 67.28
5,558.36 03/25/24 70.64 69.47
5,559.11 06/26/24 69.89 68.72
5,536.85 09/23/24 92.15 90.98
Water Levels and Data over Time
White Mesa Mill -Well TW 4-23
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,605.77 5,607.37 1.60 116.4
5,538.89 09/13/07 68.48 66.88
5,538.80 10/10/07 68.57 66.97
5,539.25 11/30/07 68.12 66.52
5,539.49 12/11/07 67.88 66.28
5,539.19 01/08/08 68.18 66.58
5,539.44 02/18/08 67.93 66.33
5,539.54 03/26/08 67.83 66.23
5,539.71 04/23/08 67.66 66.06
5,539.48 05/30/08 67.89 66.29
5,539.53 06/24/08 67.84 66.24
5,539.44 07/16/08 67.93 66.33
5,539.68 08/26/08 67.69 66.09
5,541.18 09/10/08 66.19 64.59
5,539.57 10/14/08 67.80 66.20
5,539.29 11/26/08 68.08 66.48
5,539.55 12/29/08 67.82 66.22
5,540.15 01/26/09 67.22 65.62
5,539.74 02/24/09 67.63 66.03
5,539.86 03/06/09 67.51 65.91
5,539.72 04/07/09 67.65 66.05
5,539.84 05/29/09 67.53 65.93
5,540.12 06/30/09 67.25 65.65
5,540.12 07/31/09 67.25 65.65
5,540.27 08/31/09 67.10 65.50
5,540.13 09/10/09 67.24 65.64
5,540.64 12/11/09 66.73 65.13
5,541.15 03/11/10 66.22 64.62
5,541.61 05/11/10 65.76 64.16
5,541.47 09/29/10 65.90 64.30
5,541.54 12/21/10 65.83 64.23
5,541.54 02/28/11 65.83 64.23
5,541.98 06/21/11 65.39 63.79
5,541.90 09/20/11 65.47 63.87
5,542.58 12/21/11 64.79 63.19
5,542.59 03/27/12 64.78 63.18
5,542.61 06/28/12 64.76 63.16
5,542.92 09/27/12 64.45 62.85
5,542.61 12/28/12 64.76 63.16
5,543.48 03/28/13 63.89 62.29
5,543.23 06/27/13 64.14 62.54
5,543.12 09/27/13 64.25 62.65
5,542.96 12/20/13 64.41 62.81
Water Levels and Data over Time
White Mesa Mill-Well TW4-23
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,605.77 5,607.37 1.60 116.4
5,542.35 03/27/14 65.02 63.42
5,541.42 06/25/14 65.95 64.35
5,540.65 09/25/14 66.72 65.12
5,540.34 12/17/14 67.03 65.43
5,539.47 03/26/15 67.90 66.30
5,539.22 06/22/15 68.15 66.55
5,538.82 09/30/15 68.55 66.95
5,538.28 12/02/15 69.09 67.49
5,538.29 03/30/16 69.08 67.48
5,537.60 06/30/16 69.77 68.17
5,537.07 09/29/16 70.30 68.70
5,536.86 12/21/16 70.51 68.91
5,536.91 03/30/17 70.46 68.86
5,536.49 06/27/17 70.88 69.28
5,536.18 09/28/17 71.19 69.59
5,535.72 11/30/17 71.65 70.05
5,535.62 03/28/18 71.75 70.15
5,535.34 06/22/18 72.03 70.43
5,534.93 09/25/18 72.44 70.84
5,534.64 12/17/18 72.73 71.13
5,534.23 03/25/19 73.14 71.54
5,534.22 06/24/19 73.15 71.55
5,534.01 08/12/19 73.36 71.76
5,533.51 11/18/19 73.86 72.26
5,533.26 02/10/20 74.11 72.51
5,532.76 05/04/20 74.61 73.01
5,532.33 09/22/20 75.04 73.44
5,532.30 12/30/20 75.07 73.47
5,532.32 03/11/21 75.05 73.45
5,531.71 06/24/21 75.66 74.06
5,531.63 08/13/21 75.74 74.14
5,531.77 12/30/21 75.60 74.00
5,531.17 02/10/22 76.20 74.60
5,531.73 06/28/22 75.64 74.04
5,530.84 08/15/22 76.53 74.93
5,530.58 11/17/22 76.79 75.19
5,530.34 03/24/23 77.03 75.43
5,530.51 06/26/23 76.86 75.26
5,530.20 09/28/23 77.17 75.57
5,530.48 11/20/23 76.89 75.29
5,529.87 03/26/24 77.50 75.9
5,531.13 06/26/24 76.24 74.64
5,529.49 09/23/24 77.88 76.28
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09/13/16 =-
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09/13/18 = ~ -~
09/13/19 O" -= 09/13/20 ~
09/13/21
09/13/22
09/13/23
09/13/24
Water Levels and Data over Time
White Mesa Mill -Well TW 4-24
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,625.70 5,627.83 2.13 114.8
5,570.61 09/13/07 57.22 55.09
5,570.53 10/10/07 57.30 55.17
5,571.16 11/30/07 56.67 54.54
5,571.30 12/11/07 56.53 54.40
5,571.03 01/08/08 56.80 54.67
5,571.22 02/18/08 56.61 54.48
5,571.43 03/26/08 56.40 54.27
5,571.68 04/23/08 56.15 54.02
5,571.52 05/30/08 56.31 54.18
5,571.34 06/24/08 56.49 54.36
5,571.28 07/16/08 56.55 54.42
5,571.34 08/26/08 56.49 54.36
5,571.23 09/10/08 56.60 54.47
5,571.12 10/14/08 56.71 54.58
5,570.95 11/26/08 56.88 54.75
5,570.92 12/29/08 56.91 54.78
5,571.65 01/26/09 56.18 54.05
5,571.31 02/24/09 56.52 54.39
5,571.37 03/06/09 56.46 54.33
5,571.21 04/07/09 56.62 54.49
5,571.23 05/29/09 56.60 54.47
5,571.42 06/30/09 56.41 54.28
5,571.38 07/31/09 56.45 54.32
5,571.48 08/31/09 56.35 54.22
5,571.28 09/10/09 56.55 54.42
5,571.64 12/11/09 56.19 54.06
5,571.86 03/11/10 55.97 53.84
5,571.91 05/11/10 55.92 53.79
5,572.18 09/29/10 55.65 53.52
5,571.86 12/21/10 55.97 53.84
5,571.78 02/28/11 56.05 53.92
5,572.40 06/21/11 55.43 53.30
5,572.19 09/20/11 55.64 53.51
5,573.02 12/21/11 54.81 52.68
5,573.03 03/27/12 54.80 52.67
5,573.02 06/28/12 54.81 52.68
5,573.13 09/27/12 54.70 52.57
5,573.05 12/28/12 54.78 52.65
5,566.53 03/28/13 61.30 59.17
5,564.63 06/27/13 63.20 61.07
5,570.01 09/27/13 57.82 55.69
5,566.85 12/20/13 60.98 58.85
5,562.33 03/27/14 65.50 63.37
Water Levels and Data over Time
White Mesa Mill -Well TW 4-24
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,625.70 5,627.83 2.13 114.8
5,563.43 06/25/14 64.40 62.27
5,563.43 09/25/14 64.40 62.27
5,560.97 12/17/14 66.86 64.73
5,561.95 03/26/15 65.88 63.75
5,565.38 06/22/15 62.45 60.32
5,562.61 09/30/15 65.22 63.09
5,560.91 12/02/15 66.92 64.79
5,563.69 03/30/16 64.14 62.01
5,565.64 06/30/16 62.19 60.06
5,565.35 09/29/16 62.48 60.35
5,563.33 12/21/16 64.50 62.37
5,565.27 03/30/17 62.56 60.43
5,565.86 06/27/17 61.97 59.84
5,565.21 09/28/17 62.62 60.49
5,559.24 11/30/17 68.59 66.46
5,564.78 03/28/18 63.05 60.92
5,564.83 06/22/18 63.00 60.87
5,565.47 09/24/18 62.36 60.23
5,549.72 12/17/18 78.11 75.98
5,559.52 03/25/19 68.31 66.18
5,546.68 06/24/19 81.15 79.02
5,549.54 08/12/19 78.29 76.16
5,554.44 11/18/19 73.39 71.26
5,563.62 02/10/20 64.21 62.08
5,558.32 05/04/20 69.51 67.38
5,558.88 09/21/20 68.95 66.82
5,556.76 12/28/20 71.07 68.94
5,557.89 03/11/21 69.94 67.81
5,561.51 06/24/21 66.32 64.19
5,559.12 08/13/21 68.71 66.58
5,560.64 12/30/21 67.19 65.06
5,556.44 02/10/22 71.39 69.26
5,558.22 06/28/22 69.61 67.48
5,558.62 08/15/22 69.21 67.08
5,558.14 11/17/22 69.69 67.56
5,560.03 03/24/23 67.80 65.67
5,560.22 06/26/23 67.61 65.48
5,558.57 09/25/23 69.26 67.13
5,559.92 11/20/23 67.91 65.78
5,556.45 03/25/24 71.38 69.25
5,558.98 06/26/24 68.85 66.72
5,560.22 09/23/24 67.61 65.48
Water Levels and Data over Time
White Mesa Mill -Well TW 4-25
Total or
Water Measuring Measured Total
Elevation Land Point Depth to Depth to Total
(WL) Surface Elevation Length Of Date Of Water Water Depth Of
(LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5 642.82 5,644.91 2.09 136.7
5,601.86 09/13/07 43.05 40.96
5,601.89 10/10/07 43.02 40.93
5,602.57 11/30/07 42.34 40.25
5,602.82 12/11/07 42.09 40.00
5,601.94 01/08/08 42.97 40.88
5,599.13 02/18/08 45.78 43.69
5,597.11 03/26/08 47.80 45.71
5,595.51 04/23/08 49.40 47.31
5,594.42 05/30/08 50.49 48.40
5,594.26 06/24/08 50.65 48.56
5,586.67 07/16/08 58.24 56.15
5,594.17 08/26/08 50.74 48.65
5,594.23 09/10/08 50.68 48.59
5,594.12 10/14/08 50.79 48.70
5,594.06 11/26/08 50.85 48.76
5,594.87 12/29/08 50.04 47.95
5,595.89 01/26/09 49.02 46.93
5,596.27 02/24/09 48.64 46.55
5,596.47 03/06/09 48.44 46.35
5,596.74 04/07/09 48.17 46.08
5,597.55 05/29/09 47.36 45.27
5,598.11 06/30/09 46.80 44.71
5,598.22 07/31/09 46.69 44.60
5,598.52 08/31/09 46.39 44.30
5,598.49 09/10/09 46.42 44.33
5,599.48 12/11/09 45.43 43.34
5,599.75 03/11/10 45.16 43.07
5,599.63 05/11/10 45.28 43.19
5,598.68 09/29/10 46.23 44.14
5,598.66 12/21/10 46.25 44.16
5,598.18 02/28/11 46.73 44.64
5,598.61 06/21/11 46.30 44.21
5,598.08 09/20/11 46.83 44.74
5,598.23 12/21/11 46.68 44.59
5,597.41 03/27/12 47.50 45.41
5,597.41 06/28/12 47.50 45.41
5,595.60 09/27/12 49.31 47.22
5,597.41 12/28/12 47.50 45.41
5,597.43 03/28/13 47.48 45.39
5,587.61 06/27/13 57.30 55.21
5,585.91 09/27/13 59.00 56.91
5,561.00 12/20/13 83.91 81.82
Water Levels and Data over Time
White Mesa Mill-Well TW4-25
Total or
Water Measuring Measured Total
Elevation Land Point Depth to Depth to Total
(WL) Surface Elevation Length Of Date Of Water Water Depth Of
{LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,642.82 5,644.91 2.09 136.7
5,584.79 03/27/14 60.12 58.03
5,582.44 06/25 /14 62.47 60.38
5,583.95 09/25/14 60.96 58.87
5,581.13 12/17/14 63.78 61.69
5,587.40 03/26/15 57.51 55.42
5,581.91 06/22/15 63.00 60.91
5,581.40 09/30/15 63.51 61.42
5,578.42 12/02/15 66.49 64.40
5,579.42 03/30/16 65.49 63.40
5,579.25 06/30/16 65.66 63.57
5,579.68 09/29/16 65.23 63.14
5,577.73 12/21/16 67.18 65.09
5,584.44 03/30/17 60.47 58.38
5,580.19 06/27/17 64.72 62.63
5,573.63 09/28/17 71.28 69.19
5,577.88 11/30/17 67.03 64.94
5,543.71 03/28/18 101.20 99.11
5,575.26 06/22/18 69.65 67.56
5,578.78 09/24/18 66.13 64.04
5,567.86 12/17/18 77.05 74.96
5,572.46 03/25/19 72.45 70.36
5,571.58 06/24/19 73.33 71.24
5,572.15 08/12/19 72.76 70.67
5,572.66 11/18/19 72.25 70.16
5,572.77 02/10/20 72.14 70.05
5,572.46 05/04/20 72.45 70.36
5,575.17 09/21/20 69.74 67.65
5,574.42 12/28/20 70.49 68.40
5,574.90 03/11/21 70.01 67.92
5,575.01 06/24/21 69.90 67.81
5,575.66 08/13/21 69.25 67.16
5,578.11 12/30/21 66.80 64.71
5,578.07 02/10/22 66.84 64.75
5,574.87 06/28/22 70.04 67.95
5,574.46 08/15/22 70.45 68.36
5,574.96 11/17/22 69.95 67.86
5,574.82 03/24/23 70.09 68.00
5,573.09 06/26/23 71.82 69.73
5,575.23 09/25/23 69.68 67.59
5,573.44 11/20/23 71.47 69.38
5,572.90 03/25/24 72.01 69.92
5,570.79 06/26/24 74.12 72.03
5,570.67 09/23/24 74.24 72.15
Water Levels and Data over Time
White Mesa Mill -Well TW 4-26
Total or
Measuring Measured Total
Water Land Point Date Of Depth to Depth to Total
Elevation Surface Elevation Length Of Monitoring Water Water Depth Of
(WL) (LSD) (MP) Riser (L) (blw.MP) (blw.LSD) Well
5,599.98 5,601.68 1.70 87.7
5,536.90 06/14/10 64.78 63.08
5,536.95 09/29/10 64.73 63.03
5,537.17 12/21/10 64.51 62.81
5,537.16 02/28/11 64.52 62.82
5,537.57 06/21/11 64.11 62.41
5,537.59 09/20/11 64.09 62.39
5,538.16 12/21/11 63.52 61.82
5,538.18 03/27/12 63.50 61.80
5538.23 06/28/12 63.45 61.75
5,538.57 09/27/12 63.11 61.41
5,538.20 12/28/12 63.48 61.78
5,539.13 03/28/13 62.55 60.85
5,539.00 06/27/13 62.68 60.98
5,538.94 09/27/13 62.74 61.04
5,538.97 12/20/13 62.71 61.01
5,538.53 03/27/14 63.15 61.45
5,537.85 06/25/14 63.83 62.13
5,537.33 09/25/14 64.35 62.65
5,537.14 12/17 /14 64.54 62.84
5,536.43 03/26/15 65.25 63.55
5,536.16 06/22/15 65.52 63.82
5,535.76 09/30/15 65.92 64.22
5,535.23 12/02/15 66.45 64.75
5,535.15 03/30/16 66.53 64.83
5,534.61 06/30/16 67.07 65.37
5,534.12 09/29/16 67.56 65.86
5,533.96 12/21/16 67.72 66.02
5,533.97 03/30/17 67.71 66.01
5,533.66 06/27/17 68.02 66.32
5,533.43 09/28/17 68.25 66.55
5,533.39 11/30/17 68.29 66.59
5,532.99 03/28/18 68.69 66.99
5,532.74 06/22/18 68.94 67.24
5,532.32 09/25/18 69.36 67.66
5,532.04 12/17/18 69.64 67.94
5,531.48 03/25/19 70.20 68.50
5,531.20 06/24/19 70.48 68.78
5,530.96 08/12/19 70.72 69.02
5,530.14 11/18/19 71.54 69.84
5,529.73 02/10/20 71.95 70.25
5,529.08 05/04/20 72.60 70.90
5,528.48 09/22/20 73.20 71.50
5,528.42 12/30/20 73.26 71.56
Water Levels and Data over Time
White Mesa Mill -Well TW 4-26
Total or
Measuring Measured Total
Water Land Point Date Of Depth to Depth to Total
Elevation Surface E levation Length Of Monitoring Water Water Depth Of
(WL) (LSD) (MP) Riser (L) (blw.MP) (blw.LSD) Well
5,599.98 5,601.68 1.70 87.7
5,528.39 03/11/21 73.29 71.59
5,527.76 06/24/21 73.92 72.22
5,527.73 08/13/21 73.95 72.25
5,527.80 12/30/21 73.88 72.18
5,527.26 02/10/22 74.42 72.72
5,527.73 06/28/22 73.95 72.25
5,526.86 08/15/22 74.82 73.12
5,526.62 11/17/22 75.06 73.36
5,526.45 03/24/23 75.23 73.53
5,526.35 06/26/23 75.33 73.63
5,525.89 09/28/23 75.79 74.09
5,526.33 11/20/23 75.35 73.65
5,525.75 03/26/24 75.93 74.23
5,525.49 06/26/24 76.19 74.49
5,525.41 09/23/24 76.27 74.57
'° 0
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Water Levels and Data over Time
White Mesa Mill -Well TW4-27
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
5,606.19 5,607.94 1.75 95.75
5,517.78 12/21/11 90.16 88.41
5,524.84 03/27/12 83.10 81.35
5,524.93 06/28/12 83.01 81.26
5,525.59 09/27/12 82.35 80.60
5,524.86 12/28/12 83.08 81.33
5,526.37 03/28/13 81.57 79.82
5,526.29 06/27/13 81.65 79.90
5,527.04 09/27/13 80.90 79.15
5,527.14 12/20/13 80.80 79.05
5,527.55 03/27/14 80.39 78.64
5,527.43 06/25/14 80.51 78.76
5,527.48 09/25/14 80.46 78.71
5,527.81 12/17/14 80.13 78.38
5,527.71 03/26/15 80.23 78.48
5,527.86 06/22/15 80.08 78.33
5,528.13 09/30/15 79.81 78.06
5,527.92 12/02/15 80.02 78.27
5,528.59 03/30/16 79.35 77.60
5,528.34 06/30/16 79.60 77.85
5,528.32 09/29/16 79.62 77.87
5,528.44 12/21/16 79.50 77.75
5,528.85 03/30/17 79.09 77.34
5,528.81 06/27/17 79.13 77.38
5,528.84 09/28/17 79.10 77.35
5,528.85 11/29/17 79.09 77.34
5,529.14 03/28/18 78.80 77.05
5,529.06 06/21/18 78.88 77.13
5,529.18 09/25/18 78.76 77.01
5,529.09 12/17/18 78.85 77.10
5,528.96 03/25/19 78.98 77.23
5,529.20 06/24/19 78.74 76.99
5,529.24 08/12/19 78.70 76.95
5,529.12 11/18/19 78.82 77.07
5,529.29 02/10/20 78.65 76.90
5,528.97 05/04/20 78.97 77.22
5,528.89 09/22/20 79.05 77.30
5,529.12 12/30/20 78.82 77.07
5,529.21 03/11/21 78.73 76.98
5,528.90 06/24/21 79.04 77.29
5,528.76 08/13/21 79.18 77.43
5,529.06 12/30/21 78.88 77.13
5,528.79 02/10/22 79.15 77.40
5,528.85 06/28/22 79.09 77.34
5,528.69 08/15/22 79.25 77.50
5,528.49 11/17/22 79.45 77.70
5,528.49 03/24/23 79.45 77.70
Water Levels and Data over Time
White Mesa Mill -Well TW4-27
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
5,606.19 5,607.94 1.75 95.75
5,528.69 06/26/23 79.25 77.50
5,528.55 09/28/23 79.39 77.64
5,528.73 11/20/23 79.21 77.46
5,528.39 03/26/24 79.55 77.80
5,528.26 06/26/24 79.68 77.93
5,528.29 09/23/24 79.65 77.9
ID
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Water Levels and Data over Time
White Mesa Mill -Well TW 4-28
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
5,613.52 5,617.00 3.48 108.48
5,580.69 03/28/13 36.31 32.83
5,580.30 06/27/13 36.70 33.22
5,580.35 09/27/13 36.65 33.17
5,580.25 12/20/13 36.75 33.27
5,579.83 03/27/14 37.17 33.69
5,579.21 06/25/14 37.79 34.31
5,578.84 09/25/14 38.16 34.68
5,578.72 12/17/14 38.28 34.80
5,578.11 03/26/15 38.89 35.41
5,577.83 06/22/15 39.17 35.69
5,577.56 09/30/15 39.44 35.96
5,577.27 12/02/15 39.73 36.25
5,577.25 03/30/16 39.75 36.27
5,576.75 06/30/16 40.25 36.77
5,576.36 09/29/16 40.64 37.16
5,576.13 12/21/16 40.87 37.39
5,575.92 03/30/17 41.08 37.60
5,575.50 06/27/17 41.50 38.02
5,575.08 09/28/17 41.92 38.44
5,574.80 11/29/17 42.20 38.72
5,574.36 03/28/18 42.64 39.16
5,573.92 06/22/18 43.08 39.60
5,572.37 09/25/18 44.63 41.15
5,571.74 12/17/18 45.26 41.78
5,570.65 03/25/19 46.35 42.87
5,570.60 06/24/19 46.40 42.92
5,570.24 08/12/19 46.76 43.28
5,569.87 11/18/19 47.13 43.65
5,569.89 02/10/20 47.11 43.63
5,569.01 05/04/20 47.99 44.51
5,568.41 09/22/20 48.59 45.11
5,568.29 12/30/20 48.71 45.23
5,568.32 03/11/21 48.68 45.20
5,567.79 06/24/21 49.21 45.73
5,567.64 08/13/21 49.36 45.88
5,567.89 12/30/21 49.11 45.63
5,567.24 02/10/22 49.76 46.28
5,567.75 06/28/22 49.25 45.77
5,567.73 08/15/22 49.27 45.79
5,567.42 11/17/22 49.58 46.10
5,567.16 03/24/23 49.84 46.36
5,566.74 06/26/23 50.26 46.78
5,566.43 09/28/23 50.57 47.09
Water Levels and Data over Time
White Mesa Mill -Well TW 4-28
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
5,613.52 5,617.00 3.48 108.48
5,566.61 11/20/23 50.39 46.91
5,566.83 03/26/24 50.17 46.69
5,566.50 06/26/24 50.50 47.02
5,566.37 09/23/24 50.63 47.15
Water Levels and Data over Time
White Mesa Mill -Well TW 4-29
Total or
Measuring Measured
Water Land Point Depth to Total Depth Total
Elevation Surface Elevation Length Of Date Of Water to Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,602.56 5,606.04 3.48 94.48
5,533.98 03/28/13 72.06 68.58
5,533.84 06/27/13 72.20 68.72
5,534.27 09/27/13 71.77 68.29
5,534.43 12/20/13 71.61 68.13
5,534.32 03/27/14 71.72 68.24
5,533.85 06/25/14 72.19 68.71
5,533.53 09/25/14 72.51 69.03
5,533.60 12/17/14 72.44 68.96
5,533.04 03/26/15 73.00 69.52
5,532.93 06/22/15 73.11 69.63
5,532.79 09/30/15 73.25 69.77
5,532.34 12/02/15 73.70 70.22
5,532.54 03/30/16 73.50 70.02
5,532.01 06/30/16 74.03 70.55
5,531.58 09/29/16 74.46 70.98
5,531.49 12/21/16 74.55 71.07
5,531.60 03/30/17 74.44 70.96
5,531.24 06/27/17 74.80 71.32
5,530.95 09/28/17 75.09 71.61
5,530.83 11/29/17 75.21 71.73
5,530.74 03/28/18 75.30 71.82
5,530.54 06/21/18 75.50 72.02
5,530.28 09/25/18 75.76 72.28
5,530.11 12/17/18 75.93 72.45
5,527.99 03/25/19 78.05 74.57
5,529.77 06/24/19 76.27 72.79
5,529.64 08/12/19 76.40 72.92
5,529.23 11/18/19 76.81 73.33
5,529.10 02/10/20 76.94 73.46
5,528.51 05/04/20 77.53 74.05
5,528.21 09/22/20 77.83 74.35
5,528.13 12/30/20 77.91 74.43
5,528.13 03/11/21 77.91 74.43
5,527.67 06/24/21 78.37 74.89
5,527.56 08/13/21 78.48 75.00
5,527.84 12/30/21 78.20 74.72
5,527.28 02/10/22 78.76 75.28
5,527.66 06/28/22 78.38 74.90
5,526.89 08/15/22 79.15 75.67
5,526.68 11/17/22 79.36 75.88
5,526.57 03/24/23 79.47 75.99
5,526.43 06/26/23 79.61 76.13
5,526.36 09/28/23 79.68 76.20
Water Levels and Data over Time
White Mesa Mill -Well TW 4-29
Total or
Measuring Measured
Water Land Point Depth to Total Depth Total
Elevation Surface Elevation Length Of Date Of Water to Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,602.56 5,606 .04 3.48 94.48
5,526.26 11/20/23 79.78 76.30
5,526 .03 03/26/24 80.01 76.53
5,525.86 06/26/24 80.18 76.7
5,525.80 09/23/24 80.24 76.76
Water Levels and Data over Time
White Mesa Mill -Well TW 4-30
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
5,599.33 5,602.81 3.48 93.48
5,524.78 03/28/13 78.03 74.55
5,524.79 06/27/13 78.02 74.54
5,525.54 09/27/13 77.27 73.79
5,525.81 12/20/13 77.00 73.52
5,525.98 03/27/14 76.83 73.35
5,525.91 06/25/14 76.90 73.42
5,526.00 09/25/14 76.81 73.33
5,526.41 12/17/14 76.40 72.92
5,526.23 03/26/15 76.58 73.10
5,526.48 06/22/15 76.33 72.85
5,526 .74 09/30/15 76.07 72.59
5,526.56 12/02/15 76.25 72.77
5,527.26 03/30/16 75.55 72.07
5,527.04 06/30/16 75.77 72.29
5,526.97 09/29/16 75.84 72.36
5,527.17 12/21/16 75.64 72.16
5,527.65 03/30/17 75.16 71.68
5,527.54 06/27/17 75.27 71.79
5,527.56 09/28/17 75.25 71.77
5,527.59 11/29/17 75.22 71.74
5,527.88 03/28/18 74 .93 71.45
5,527.86 06 /21/18 74.95 71.47
5,525.76 09/25/18 77.05 73.57
5,527.87 12/17/18 74.94 71.46
5,527.69 03/25/19 75.12 71.64
5,528.01 06/24/19 74.80 71.32
5,528.04 08/12/19 74.77 71.29
5,527.94 11/18/19 74.87 71.39
5,528.12 02/10/20 74.69 71.21
5,527.73 05/04/20 75.08 71.6
5,527 .75 09/22/20 75.06 71.58
5,527 .90 12/30/20 74.91 71.43
5,527.96 03/11/21 74.85 71.37
5,527.75 06/24/21 75.06 71.58
5,527.65 08/13/21 75.16 71.68
5,527.88 12/30/21 74.93 71.45
5,527.63 02/10/22 75.18 71.7
5,527.77 06/28/22 75.04 71.56
5,527.50 08/15/22 75.31 71.83
5,527.36 11/17/22 75.45 71.97
5,527.35 03/24/23 75.46 71.98
5,527.50 06/26/23 75.31 71.83
5,527.44 09/28/23 75.37 71.89
5,527.54 11/20/23 75.27 71.79
5,527.27 03/26/24 75.54 72.06
Water Levels and Data over Time
White Mesa Mill -Well TW 4-30
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
5,599.33 5,602.81 3.48 93.48
5,527.13 06/26/24 75.68 72.2
5,527.15 09/23/24 75.66 72.18
Water Levels and Data over Time
White Mesa Mill-Well TW4-31
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
5,601.10 5,604.58 3.48 107.48
5,520.17 03/28/13 84.41 80.93
5,520.36 06/27/13 84.22 80.74
5,521.22 09/27/13 83.36 79.88
5,521.81 12/20/13 82.77 79.29
5,522.25 03/27/14 82.33 78.85
5,522.32 06/25/14 82.26 78.78
5,522.64 09/25/14 81.94 78.46
5,523.27 12/17/14 81.31 77.83
5,523.33 03/26/15 81.25 77.77
5,523.82 06/22/15 80.76 77.28
5,524.34 09/30/15 80.24 76.76
5,524.29 12/02/15 80.29 76.81
5,525.32 03/30/16 79.26 75.78
5,525.33 06/30/16 79.25 75.77
5,525.43 09/29/16 79.15 75.67
5,525.81 12/21/16 78.77 75.29
5,526.48 03/30/17 78.10 74.62
5,526.53 06/30/17 78.05 74.57
5,526.68 09/28/17 77.90 74.42
5,526.82 11/29/17 77.76 74.28
5,527.28 03/28/18 77.30 73.82
5,527.36 06/21/18 77.22 73.74
5,529.67 09/25/18 74.91 71.43
5,527.58 12/17/18 77.00 73.52
5,527.53 03/25/19 77.05 73.57
5,527.94 06/24/19 76.64 73.16
5,528.03 08/12/19 76.55 73.07
5,528.02 11/18/19 76.56 73.08
5,528.30 02/10/20 76.28 72.80
5,528.01 05/04/20 76.57 73.09
5,528.13 09/22/20 76.45 72.97
5,528.41 12/30/20 76.17 72.69
5,528.59 03/11/21 75.99 72.51
5,528.34 06/24/21 76.24 72.76
5,528.17 08/13/21 76.41 72.93
5,528.49 12/30/21 76.09 72.61
5,528.36 02/10/22 76.22 72.74
5,528.30 06/28/22 76.28 72.80
5,528.30 08/15/22 76.28 72.80
5,528.15 11/17/22 76.43 72.95
5,528.64 03/24/23 75.94 72.46
5,528.48 06/26/23 76.10 72.62
5,528.38 09/28/23 76.20 72.72
5,528.60 11/20/23 75.98 72.50
5,528.26 03/26/24 76.32 72.84
Water Levels and Data over Time
White Mesa Mill-Well TW4-31
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
5,601.10 5,604.58 3.48 107.48
5,528.13 06/26/24 76.45 72.97
5,528.17 09/23/24 76.41 72.93
Water Levels and Data over Time
White Mesa Mill -Well TW 4-32
Measuri_og Total or Total Water Land Measured Total
Elevation Surface Point Length Of Date Of Depth to Depth to Depth Of Elevation Riser (L) Monitoring Water (WL) (LSD) (MP) Water (blw.LSD) Well
{blw.MP}
5,610.20 5,611.84 1.64 114.64
5,564.43 09/27/13 47.41 45.77
5,563.74 12/20/13 48.10 46.46
5,563.24 03/27/14 48.60 46.96
5,562.43 06/25/14 49.41 47.77
5,561.90 09/25/14 49.94 48.30
5,560.93 12/17/14 50.91 49.27
5,561.35 03/26/15 50.49 48.85
5,561.15 06/22/15 50.69 49.05
5,560.96 09/30/15 50.88 49.24
5,560.58 12/02/15 51.26 49.62
5,560.85 03/30/16 50.99 49.35
5,560.25 06/30/16 51.59 49.95
5,559.69 09/29/16 52.15 50.51
5,559.75 12/21/16 52.09 50.45
5,560.14 03/30/17 51.70 50.06
5,559.44 06/27/17 52.40 50.76
5,558.99 09/28/17 52.85 51.21
5,558.84 11/29/17 53.00 51.36
5,558.85 03/28/18 52.99 51.35
5,558.52 06/22/18 53.32 51.68
5,557.92 09/25/18 53.92 52.28
5,557.89 12/17/18 53.95 52.31
5,557.24 03/25/19 54.60 52.96
5,557.41 06/24/19 54.43 52.79
5,557.03 08/12/19 54.81 53.17
5,556.86 11/18/19 54.98 53.34
5,557.04 02/10/20 54.80 53.16
5,556.29 05/04/20 55.55 53.91
5,555.99 09/22/20 55.85 54.21
5,555.99 12/30/20 55.85 54.21
5,556.19 03/11/21 55.65 54.01
5,555.54 06/24/21 56.30 54.66
5,555.41 08/13/21 56.43 54.79
5,555.56 12/30/21 56.28 54.64
5,555.23 02/10/22 56.61 54.97
5,555.56 06/28/22 56.28 54.64
5,554.76 08/15/22 57.08 55.44
5,554.52 11/17/22 57.32 55.68
5,555.13 03/24/23 56.71 55.07
5,554.53 06/26/23 57.31 55.67
5,554.39 09/28/23 57.45 55.81
5,554.20 11/20/23 57.64 56.00
5,554.18 03/26/24 57.66 56.02
5,553.92 06/26/24 57.92 56.28
5,553.82 09/23/24 58.02 56.38
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Water Levels and Data over Time
White Mesa Mill -Well TW 4-33
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
5,605.20 5,606.73 1.53 86.23
5,536.70 09/27/13 70.03 68.50
5,536.62 12/20/13 70.11 68.58
5,536.49 03/27/14 70.24 68.71
5,536.06 06/25/14 70.67 69.14
5,535.73 09/25/14 71.00 69.47
5,535.73 12/17/14 71.00 69.47
5,535.14 03/26/15 71.59 70.06
5,534.98 06/22/15 71.75 70.22
5,534.81 09/30/15 71.92 70.39
5,534.34 12/02/15 72.39 70.86
5,534.33 03/30/16 72.40 70.87
5,533.90 06/30/16 72.83 71.30
5,533.48 09/29/16 73.25 71.72
5,533.39 12/21/16 73.34 71.81
5,533.28 03/30/17 73.45 71.92
5,533.01 06/27/17 73.72 72.19
5,532.67 09/28/17 74.06 72.53
5,532.53 11/29/17 74.20 72.67
5,532.37 03/28/18 74.36 72.83
5,532.13 06/21/18 74.60 73.07
5,531.82 09/25/18 74.91 73.38
5,531.61 12/17/18 75.12 73.59
5,531.14 03/25/19 75.59 74.06
5,531.08 06/24/19 75.65 74.12
5,530.98 08/12/19 75.75 74.22
5,530.45 11/18/19 76.28 74.75
5,530.22 02/10/20 76.51 74.98
5,529.68 05/04/20 77.05 75.52
5,529.30 09/22/20 77.43 75.90
5,529.15 12/30/20 77.58 76.05
5,529.07 03/11/21 77.66 76.13
5,528.64 06/24/21 78.09 76.56
5,528.48 08/13/21 78.25 76.72
5,528.74 12/30/21 77.99 76.46
5,528.18 02/10/22 78.55 77.02
5,528.57 06/28/22 78.16 76.63
5,527.78 08/15/22 78.95 77.42
5,527.65 11/17/22 79.08 77.55
5,527.34 03/24/23 79.39 77.86
5,527.28 06/26/23 79.45 77.92
5,527.21 09/28/23 79.52 77.99
5,527.45 11/20/23 79.28 77.75
5,526.88 03/26/24 79.85 78.32
5,526.70 06/26/24 80.03 78.50
5,526.60 09/23/24 80.13 78.60
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Water Levels and Data over Time
White Mesa Mill -Well TW 4-34
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
5,601.60 5,603.34 1.74 95.74
5,534.04 09/27/13 69.30 67.56
5,534.14 12/20/13 69.20 67.46
5,533.89 03/27/14 69.45 67.71
5,533.32 06/25/14 70.02 68.28
5,532.94 09/25/14 70.40 68.66
5,532.99 12/17/14 70.35 68.61
5,532.37 03/26/15 70.97 69.23
5,532.24 06/22/15 71.10 69.36
5,532.08 09/30/15 71.26 69.52
5,531.79 12/02/15 71.55 69.81
5,531.80 03/30/16 71.54 69.80
5,531.28 06/30/16 72.06 70.32
5,530.87 09/29/16 72.47 70.73
5,530.74 12/21/16 72.60 70.86
5,530.79 03/30/17 72.55 70.81
5,530.43 06/27/17 72.91 71.17
5,530.12 09/28/17 73.22 71.48
5,530.01 11/29/17 73.33 71.59
5,529.84 03/28/18 73.50 71.76
5,529.64 06/21/18 73.70 71.96
5,529.39 09/25/18 73.95 72.21
5,529.23 12/17/18 74.11 72.37
5,528.83 03/25/19 74.51 72.77
5,528.84 06/24/19 74.50 72.76
5,528.75 08/12/19 74.59 72.85
5,528.30 11/18/19 75.04 73.30
5,528.18 02/10/20 75.16 73.42
5,527.62 05/04/20 75.72 73.98
5,527.28 09/22/20 76.06 74.32
5,527.22 12/30/20 76.12 74.38
5,527.10 03/11/21 76.24 74.50
5,526.73 06/24/21 76.61 74.87
5,526.63 08/13/21 76.71 74.97
5,526.78 12/30/21 76.56 74.82
5,526.26 02/10/22 77.08 75.34
5,525.76 06/28/22 77.58 75.84
5,525.83 08/15/22 77.51 75.77
5,525.67 11/17/22 77.67 75.93
5,525.37 03/24/23 77.97 76.23
5,525.49 06/26/23 77.85 76.11
5,525.32 09/28/23 78.02 76.28
5,525.43 11/20/23 77.91 76.17
5,524.95 03/26/24 78.39 76.65
5,524.79 06/26/24 78.55 76.81
5,524.72 09/23/24 78.62 76.88
Water Levels and Data over Time
White Mesa Mill -Well TW 4-35
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
5,598.67 5,599.87 1.20 86.5
5,525.52 09/25/14 74.35 73.15
5,525.72 12/17/14 74.15 72.95
5,525.56 03/26/15 74.31 73.11
5,525.67 06/22/15 74.20 73.00
5,525.81 09/30/15 74.06 72.86
5,525.57 12/02/15 74.30 73.10
5,526.01 03/30/16 73.86 72.66
5,525.75 06/30/16 74.12 72.92
5,525.57 09/29/16 74.30 73.10
5,525.62 12/21/16 74.25 73.05
5,525.87 03/30/17 74.00 72.80
5,525.70 06/27/17 74.17 72.97
5,525.57 09/28/17 74.30 73.10
5,525.56 11/29/17 74.31 73.11
5,525.64 03/28/18 74.23 73.03
5,525.56 06/21/18 74.31 73.11
5,525.46 09/25/18 74.41 73.21
5,525.37 12/17/18 74.50 73.30
5,525.12 03/25/19 74.75 73.55
5,525.35 06/24/19 74.52 73.32
5,525.31 08/12/19 74.56 73.36
5,525.12 11/18/19 74.75 73.55
5,525.17 02/10/20 74.70 73.50
5,524.80 05/04/20 75.07 73.87
5,524.71 09/22/20 75.16 73.96
5,524.82 12/30/20 75.05 73.85
5,524.49 03/11/21 75.38 74.18
5,524.52 06/24/21 75.35 74.15
5,524.45 08/13/21 75.42 74.22
5,524.58 12/30/21 75.29 74.09
5,524.30 02/10/22 75.57 74.37
5,524.47 06/28/22 75.40 74.20
5,524.09 08/15/22 75.78 74.58
5,523.89 11/17/22 75.98 74.78
5,523.80 03/24/23 76.07 74.87
5,523.95 06/26/23 75.92 74.72
5,523.90 09/28/23 75.97 74.77
5,523.82 11/20/23 76.05 74.85
5,523.70 03/26/24 76.17 74.97
5,520.54 06/26/24 79.33 78.13
5,523.57 09/23/24 76.30 75.10
Water Levels and Data over Time
White Mesa Mill -Well TW 4-36
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
5,615.18 5,616.59 1.41 99.41
5,559.14 09/25/14 57.45 56.04
5,559.77 12/17/14 56.82 55.41
5,559.79 03/26/15 56.80 55.39
5,560.08 06/22/15 56.51 55.10
5,560.18 09/30/15 56.41 55.00
5,559.95 12/02/15 56.64 55.23
5,560.53 03/30/16 56.06 54.65
5,560.20 06/30/16 56.39 54.98
5,560.00 09/29/16 56.59 55.18
5,560.04 12/21/16 56.55 55.14
5,560.43 03/30/17 56.16 54.75
5,560.26 06/27/17 56.33 54.92
5,560.12 09/28/17 56.47 55.06
5,560.07 11/29/17 56.52 55.11
5,560.18 03/28/18 56.41 55.00
5,560.11 06/22/18 56.48 55.07
5,560.14 09/25/18 56.45 55.04
5,559.78 12/17/18 56.81 55.40
5,559.43 03/25/19 57.16 55.75
5,559.61 06/24/19 56.98 55.57
5,559.55 08/12/19 57.04 55.63
5,559.28 11/18/19 57.31 55.90
5,559.32 02/10/20 57.27 55.86
5,558.94 05/04/20 57.65 56.24
5,558.64 09/22/20 57.95 56.54
5,558.76 12/30/20 57.83 56.42
5,558.84 03/11/21 57.75 56.34
5,558.44 06/24/21 58.15 56.74
5,558.31 08/13/21 58.28 56.87
5,558.53 12/30/21 58.06 56.65
5,558.09 02/10/22 58.50 57.09
5,558.46 06/28/22 58.13 56.72
5,557.86 08/15/22 58.73 57.32
5,557.72 11/17/22 58.87 57.46
5,558.03 03/24/23 58.56 57.15
5,557.79 06/26/23 58.80 57.39
5,557.47 09/28/23 59.12 57.71
5,557.88 11/20/23 58.71 57.30
5,557.19 03/26/24 59.40 57.99
5,557.38 06/26/24 59.21 57.80
5,556.99 09/23/24 59.60 58.19
Water Levels and Data over Time
White Mesa Mill-Well TW4-37
Total or
Measuring Measured
Water Point Depth to Total Depth
Elevation Land Surface Elevation Length Of Date Of Water to Water Total Depth
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Of Well
5,630.13 5,631.85 1.72 113.72
5,571.99 06/22/15 59.86 58.14
5,570.67 09/30/15 61.18 59.46
5,568.25 12/02/15 63.60 61.88
5,569.80 03/30/16 62.05 60.33
5,569.07 06/30/16 62.78 61.06
5,569.40 09/29/16 62.45 60.73
5,568.35 12/21/16 63.50 61.78
5,524.05 03/30/17 107.80 106.08
5,566.35 06/27/17 65.50 63.78
5,568.47 09/28/17 63.38 61.66
5,567.57 11/30/17 64.28 62.56
5,567.83 03/28/18 64.02 62.30
5,567.87 06/22/18 63.98 62.26
5,567.35 09/24/18 64.50 62.78
5,555.12 12/17/18 76.73 75.01
5,558.24 03/25/19 73.61 71.89
5,560.63 06/24/19 71.22 69.50
5,550.84 08/12/19 81.01 79.29
5,560.14 11/18/19 71.71 69.99
5,558.17 02/10/20 73.68 71.96
5,555.68 05/04/20 76.17 74.45
5,553.36 09/21/20 78.49 76.77
5,563.37 12/28/20 68.48 66.76
5,562.66 03/11/21 69.19 67.47
5,558.68 06/24/21 73.17 71.45
5,559.70 08/13/21 72.15 70.43
5,558.45 12/30/21 73.40 71.68
5,562.73 02/10/22 69.12 67.40
5,559.41 06/28/22 72.44 70.72
5,560.55 08/15/22 71.30 69.58
5,559.90 11/17/22 71.95 70.23
5,559.42 03/24/23 72.43 70.71
5,560.45 06/26/23 71.40 69.68
5,559.04 09/25/23 72.81 71.09
5,564.02 11/20/23 67.83 66.11
5,563.13 03/25/24 68.72 67.00
5,557.49 06/26/24 74.36 72.64
5,564.11 09/23/24 67.74 66.02
Water Levels and Data over Time
White Mesa Mill -Well TW 4-38
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
5,628.82 5,629.99 1.17 113.92
5,576.59 12/21/16 53.40 52.23
5,576.62 03/30/17 53.37 52.20
5,576.07 06/27/17 53.92 52.75
5,577.49 09/28/17 52.50 51.33
5,575.68 11/30/17 54.31 53.14
5,574.69 03/28/18 55.30 54.13
5,574.25 06/22/18 55.74 54.57
5,573.63 09/25/18 56.36 55.19
5,572.31 12/17/18 57.68 56.51
5,572.51 03/25/19 57.48 56.31
5,572.53 06/24/19 57.46 56.29
5,572.31 08/12/19 57.68 56.51
5,571.90 11/18/19 58.09 56.92
5,571.67 02/10/20 58.32 57.15
5,571.20 05/04/20 58.79 57.62
5,570.69 09/22/20 59.30 58.13
5,570.74 12/30/20 59.25 58.08
5,570.54 03/11/21 59.45 58.28
5,570.04 06/24/21 59.95 58.78
5,569.93 08/13/21 60.06 58 .89
5,570.39 12/30/21 59.60 58.43
5,569.49 02/10/22 60.50 59.33
5,569.98 06/28/22 60.01 58.84
5,569.51 08/15/22 60.48 59.31
5,569.29 11/17/22 60.70 59.53
5,568.97 03/24/23 61.02 59.85
5,569.09 06/26/23 60.90 59.73
5,568.72 09/28/23 61.27 60.10
5,568.31 11/20/23 61.68 60.51
5,568.37 03/26/24 61.62 60.45
5,568.11 06/26/24 61.88 60.71
5,567.99 09/23/24 62.00 60.83
Water Levels and Data over Time
White Mesa Mill -Well TW 4-39
Total or
Measuring Measured
Water Land Point Depth to Total Depth Total
Elevation Surface Elevation Length Of Date Of Water to Water Depth Of
(WL) (LSD) (MP) Riser (L) Monitoring (blw.MP) (blw.LSD) Well
5,628.82 5,629.56 0.74 120.74
5,566.39 12/21/16 63.17 62.43
5,567.57 03/30/17 61.99 61.25
5,567.11 06/27/17 62.45 61.71
5,567.26 09/28/17 62.30 61.56
5,560.52 11/30/17 69.04 68.30
5,565.51 03/28/18 64.05 63.31
5,529.91 06/22/18 99.65 98.91
5,565.04 09/24/18 64.52 63.78
5,557.32 12/17/18 72.24 71.50
5,564.12 03/25/19 65.44 64.70
5,553.85 06/24/19 75.71 74.97
5,555.03 08/12/19 74.53 73.79
5,549.98 11/18/19 79.58 78.84
5,548.39 02/10/20 81.17 80.43
5,544.51 05/04/20 85.05 84.31
5,552.04 09/21/20 77.52 76.78
5,553.71 12/28/20 75.85 75.11
5,557.31 03/11/21 72.25 71.51
5,554.26 06/24/21 75.30 74.56
5,555.01 08/13/21 74.55 73.81
5,555.23 12/30/21 74.33 73.59
5,559.05 02/10/22 70.51 69.77
5,558.79 06/28/22 70.77 70.03
5,555.74 08/15/22 73.82 73.08
5,558.96 11/17/22 70.60 69.86
5,554.96 03/24/23 74.60 73.86
5,556.05 06/26/23 73.51 72.77
5,559.02 09/25/23 70.54 69.80
5,555.06 11/20/23 74.50 73.76
5,554.69 03/25/24 74.87 74.13
5,553.37 06/26/24 76.19 75.45
5,559.01 09/23/24 70.55 69.81
Water Levels and Data over Time
White Mesa Mill -Well TW 4-40
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
5,595.66 5 597.58 1.92 86
5,531.12 03/28/18 66.46 64.54
5,530.83 06/22/18 66.75 64.83
5,530.34 09/25/18 67.24 65.32
5,530.06 12/17/18 67.52 65.60
5,529.52 03/25/19 68.06 66.14
5,527.69 06/24/19 69.89 67.97
5,526.98 08/12/19 70.60 68.68
5,526.43 11/18/19 71.15 69.23
5,525.57 02/10/20 72.01 70.09
5,525.81 05/04/20 71.77 69.85
5,525.51 09/21/20 72.07 70.15
5,523.08 12/28/20 74.50 72.58
5,526.17 03/11/21 71.41 69.49
5,525.45 06/24/21 72.13 70.21
5,525.26 08/13/21 72.32 70.40
5,525.46 12/30/21 72.12 70.20
5,525.47 02/10/22 72.11 70.19
5,524.39 06/28/22 73.19 71.27
5,525.27 08/15/22 72.31 70.39
5,525.24 11/17/22 72.34 70.42
5,525.30 03/24/23 72.28 70.36
5,524.73 06/26/23 72.85 70.93
5,525.48 09/25/23 72.10 70.18
5,524.97 11/20/23 72.61 70.69
5,524.38 03/25/24 73.20 71.28
5,524.85 06/26/24 72.73 70.81
5,524.44 09/23/24 73.14 71.22
!;Z/10/£0
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Water Levels and Data over Time
White Mesa Mill-Well TW4-41
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
5,613.31 5,614.96 1.65 97.8
5,539.24 03/28/18 75.72 74.07
5,526.18 06/22/18 88.78 87.13
5,513.86 09/24/18 101.10 99.45
5,536.53 12/17/18 78.43 76.78
5,521.88 03/25/19 93.08 91.43
5,527.89 06/24/19 87.07 85.42
5,530.75 08/12/19 84.21 82.56
5,536.69 11/18/19 78.27 76.62
5,538.67 02/10/20 76.29 74.64
5,526.94 05/04/20 88.02 86.37
5,529.30 09/21/20 85.66 84.01
5,528.43 12/28/20 86.53 84.88
5,525.74 03/11/21 89.22 87.57
5,525.25 06/24/21 89.71 88.06
5,526.09 08/13/21 88.87 87.22
5,524.68 12/30/21 90.28 88.63
5,524.95 02/10/22 90.01 88.36
5,524.97 06/28/22 89.99 88.34
5,525.83 08/15/22 89.13 87.48
5,525.79 11/17/22 89.17 87.52
5,524.86 03/24/23 90.10 88.45
5,525.74 06/26/23 89.22 87.57
5,526.03 09/25/23 88.93 87.28
5,525.31 11/20/23 89.65 88.00
5,526.00 03/25/24 88.96 87.31
5,525.68 06/26/24 89.28 87.63
5,524.07 09/23/24 90.89 89.24
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Depth Below Measuring Point (ft.)
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03/01/19
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Water Levels and Data over Time
White Mesa Mill -Well TW 4-42
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
5,592.39 5,594.70 2.31 86.0
5,518.98 03/28/18 75.72 73.41
5,528.28 06/24/19 66.42 64.11
5,527.90 08/12/19 66.80 64.49
5,527.13 11/18/19 67.57 65.26
5,526.83 02/10/20 67.87 65.56
5,526.10 05/04/20 68.60 66.29
5,525.75 09/22/20 68.95 66.64
5,525.59 12/30/20 69.11 66.80
5,525.52 03/11/21 69.18 66.87
5,525.00 06/24/21 69.70 67.39
5,524.77 08/13/21 69.93 67.62
5,525.14 12/30/21 69.56 67.25
5,524.45 02/10/22 70.25 67.94
5,524.93 06/28/22 69.77 67.46
5,523.95 08/15/22 70.75 68.44
5,523.74 11/17/22 70.96 68.65
5,523.71 03/24/23 70.99 68.68
5,523.30 06/26/23 71.40 69.09
5,523.08 09/28/23 71.62 69.31
5,522.93 11/20/23 71.77 69.46
5,522.58 03/26/24 72.12 69.81
5,522.37 06/26/24 72.33 70.02
5,522.23 09/23/24 72.47 70.16
Water Levels and Data over Time
White Mesa Mill -Well TW 4-43
Total or
Measuring Measured
Water Land Point Date Of Depth to Total Depth Total
Elevation Surface Elevation Length Of Monitoring Water to Water Depth Of
(WL) (LSD) (MP) Riser (L) (blw.MP) (blw.LSD) Well
5,595.17 5,596.89 1.72 95.5
5,523.85 12/30/21 73.04 71.32
5,523.48 02/10/22 73.41 71.69
5,523.28 06/28/22 73.61 71.89
5,523.41 08/15/22 73.48 71.76
5,523.25 11/17/22 73.64 71.92
5,523.67 03/24/23 73.22 71.50
5,523.58 06/26/23 73.31 71.59
5,523.45 09/28/23 73.44 71.72
5,523.74 11/20/23 73.15 71.43
5,523.35 03/26/24 73.54 71.82
5,523.24 06/26/24 73.65 71.93
5,523.28 09/23/24 73.61 71.89
tl/10/Zl
vl/I0/90
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TabG
Chloroform Mass Removed and Volume Pumped in Chloroform Pumping Wells over Time
Table G-1
Quarterly Calculation of Chloroform Removed and Total Volume of Water Pumped
MW-4 MW-26 (formerly TW4-15)
Total Total Pumped Total Total Total Total Pumped Total Total Quarter Pumped Cone Total (ug) Cone Total (ug)
(eal) (liters) (grams) (pounds) Pumped (gal) (liters) (grams) (pounds)
QI 2007 1307110 3370 4947411.4 l.6673E+I0 16673 36.8 930510 1660 3521980.4 5846487381 5846 12.9
Q2 2007 81230 2000 307455 .6 614911100 615 1.4 54400 300 205904.0 61771200 62 0.1
Q3 2007 100700 2600 381149.5 990988700 991 2.2 72080 1400 272822.8 381951920 382 0.8
Q4 2007 90830 2300 343791.6 790720565 791 1.7 61750 2000 233723.8 467447500 467 1.0
QI 2008 83950 2400 3 I 7750 .8 762601800 763 1.7 47780 930 180847.3 168187989 168 0.4
Q2 2008 62780 2500 237622.3 594055750 594 1.3 44840 1300 169719.4 220635220 221 0.5
Q3 2008 81400 1800 308099.0 554578200 555 1.2 61280 630 231944.8 146125224 146 0.3
Q4 2008 91320 1700 345646.2 587598540 588 1.3 55700 630 210824.5 132819435 133 0.3
QI 2009 90710 2200 343337.4 755342170 755 1.7 52970 950 200491.5 190466878 190 0.4
Q2 2009 450040 1800 1703401.4 3066122520 3066 6.8 58050 410 219719.3 90084892.5 90 0.2
Q3 2009 90420 2000 342239.7 684479400 684 1.5 57610 850 218053.9 185345773 185 0.4
Q4 2009 322380 1800 1220208.3 2196374940 2196 4.8 61960 1100 234518.6 257970460 258 0.6
QI 2010 68125 1600 257853 .1 412565000 413 0.9 61320 780 232096.2 181035036 181 0.4
Q2 2010 84005.33 2100 317960.2 667716366 668 1.5 60500 1900 228992.5 435085750 435 1.0
Q3 2010 79859.1 1900 302266.7 574306718 574 1.3 63850 2200 241672.3 531678950 532 1.2
Q4 2010 90042.2 1500 340809.7 511214591 511 I.I 60180 970 227781.3 220947861 221 0.5
QI 2011 76247.6 1700 288597.2 490615182 491 I.I 55130 450 208667.1 93900172.5 94 0.2
Q2 2011 85849.3 1700 324939.6 552397321 552 1.2 55800 .6 1800 211205.3 380169488 380 0.8
Q3 2011 85327 .7 1700 322965.3 549041086 549 1.2 65618 720 248364.1 178822174 179 0.4
Q42011 89735.0 1600 339647.0 543435160 543 1.2 50191.3 1800 189974.1 341953327 342 0.8
QI 2012 90376.4 1500 342074.7 513112011 513 I.I 31440.1 2400 119000.8 285601868 286 0.6
Q2 2012 90916.5 1400 344118.8 481766269 482 I.I 26701.2 3000 101064.1 303192353 303 0.7
Q3 2012 91607.0 1500 346732.5 520098743 520 I.I 25246 3100 95556 .1 296223941 296 0.7
04 2012 78840.0 1300 298409.4 387932220 388 0.9 30797 1200 116566.6 139879974 140 0.3
QI 2013 62943.7 1670 238241.9 397863981 398 0.9 22650.7 2120 85732 .9 181753747 182 0.4
Q2 2013 71187.3 1490 269443.9 401471456 401 0.9 25343.4 4030 95924.8 386576819 387 0.9
Q3 2013 72898.8 1520 275922.0 419401376 419 0.9 25763 2940 97513.0 286688088 287 0.6
Q4 2013 70340.4 1410 266238.4 375396164 375 0.8 24207.6 1410 91625.8 129192330 129 0.3
QI 2014 69833.8 1390 264320.9 367406097 367 0.8 23263 .1 1400 88050 .8 123271167 123 0.3
Q2 2014 71934.9 1390 272273.6 378460299 378 0.8 23757.5 1960 89922 .1 176247390 176 0.4
Q3 2014 74788.2 1490 283073.3 421779272 422 0.9 24062.4 2120 91076 .2 193081510 193 0.4
Q4 2014 63093.0 1440 238807.0 343882087 344 0.8 21875 .8 2090 82799.9 173051797 173 0.4
QI 2015 76454.3 1400 289379.5 405131336 405 0.9 24004.9 1980 90858.5 179899922 180 0.4
Q2 2015 60714.7 1300 229805.1 298746681 299 0.7 27804.6 1980 105240.4 208376014 208 0.5
Q3 2015 89520.8 1290 338836.2 437098734 437 1.0 21042.0 2350 79644 .0 187163330 187 0.4
Q4 2015 99633.4 1200 377112.4 452534903 453 1.0 19355 .6 2680 73260.9 196339335 196 0.4
QI 2016 90882.1 1240 343988.7 426546048 427 0.9 19150.8 2650 72485.8 192087312 192 0.4
Q2 2016 96540.5 1580 365405.8 577341152 577 1.3 22105.7 2220 83670.1 185747565 186 0.4
Q3 2016 79786.4 1430 301991.5 431847879 432 1.0 17149.5 3190 64910.9 207065635 207 0.5
Q4 2016 85414 .0 1470 323292.0 475239225 475 1.0 18541.6 2510 70180.0 176151690 176 0 .4
QI 2017 76642.3 1450 290091.1 420632103 421 0.9 26107.0 1290 98815.0 127471344 127 0.3
Q22017 72299 .8 1430 273654.7 391326282 391 0 .9 25921.8 2450 98114.0 240379332 240 0 .5
Q3 2017 95349.3 1400 360897.1 505255941 505 I.I 27489.9 1230 104049.3 127980604 128 0.3
Q42017 106679.8 1320 403783.0 532993617 533 1.2 26445.8 2570 100097.4 257250197 257 0.6
Table G-1
Quarterl y Calculation of Chloroform Removed and Total Volume of Water Pumped
MW-4 MW-26 (for me.rl y TW4-l 5)
Total Total Pumped Total Total Total Total Pumped Total Total Quarter Pumped Cone Total (ug) Cone Total (ug)
(li;al) (liters) (grams) (pounds) Pumped (gal) (liters) (grams) (pounds)
QI 2018 105060 .4 1320 397653.6 524902770 525 1.2 27004.7 1210 102212.8 123677475 124 0.3
Q2 2018 101786 .2 1240 385260.8 477723351 478 1.1 26654.7 1870 100888.0 188660634 189 0.4
03 2018 95480.5 1300 361393.7 469811800 470 1.0 25536.1 1680 96654.1 162378953 162 0.4
Q4 2018 102884 .8 1330 389418.9 517927177 518 I.I 23791.3 1480 90050.1 133274104 133 0.3
QI 2019 111746.9 1190 422962.0 503324800 503 I.I 26798.5 1110 101432.3 112589878 113 0.2
02 2019 94540.7 1300 357836.5 465187514 465 1.0 24050.2 1280 91030.0 116518409 117 0.3
Q3 2019 95517.7 1180 361534.5 426610704 427 0.9 24181.1 1360 91525.5 124474630 124 0.3
Q4 2019 99220.8 1370 375550.9 514504705 515 1.1 22384.8 1390 84726.5 117769791 118 0.3
QI 2020 102597.0 1230 388329.6 477645370 478 I. I 24107.0 1100 91245.0 100369495 JOO 0.2
Q2 2020 101850 .7 1250 385504.9 481881077 482 1.1 25418.4 1610 96208.6 154895917 155 0.3
03 2020 84607.8 1240 320240.6 397098342 397 0 .9 23663 .7 1130 89567.l 101210828 JOI 0 .2
Q4 2020 91258.6 1050 345413 .8 362684491 363 0.8 28934.5 866 109517.1 94841793.4 95 0 .2
QI 2021 93486.7 1150 353847 .3 406924364 407 0.9 27898 .0 3060 105593.9 323117426 323 0.7
Q2 2021 93252.4 1320 352960.3 465907641 466 1.0 29124.1 998 110234 .7 110014249 110 0 .2
Q3 2021 89693.5 1140 339489.9 387018483 387 0.9 27945.6 1580 105774.1 167123072 167 0.4
Q4 2021 95091.4 1100 359920.9 395913044 396 0.9 30045.3 826 113721.5 93933926.4 94 0.2
QI 2022 96291.3 1040 364462.6 379041073 379 0.8 29113.3 1030 110193 ,8 113499656 l 13 0.3
Q2 2022 93554.5 1010 354103 .8 357644820 358 0.8 29385.9 61 l 111225 .6 67958860.8 68 0.1
03 2022 82718 .6 1200 313089.9 375707881 376 0.8 28531.3 612 I 07991.0 66090473 .9 66 0.1
04 2022 91487.4 1170 346279.8 405147421 405 0.9 29411.4 1040 111322.1 115775035 116 0.3
QI 2023 90044.0 JOJO 340816.6 344224782 344 0.8 27474.7 571 103991.7 59379283 .3 59 0.1
02 2023 91310.8 1050 345611.5 362892026 363 0 .8 25207 .6 2230 95410.8 212766008 213 0.5
Q3 2023 95944.3 1030 363149. l 374043612 374 0 .8 26841.5 2610 101595 .1 265163152 265 0 .6
Q4 2023 85275 .0 1690 322766.0 545474585 545 1.2 21628.4 836 81863.5 68437881 68 0 ,2
QI 2024 90964.1 950 344299.3 327084306 327 0.7 22861.5 542 86530.8 46899681.4 47 0.1
Q2 2024 90289.4 1660 341745.4 567297329 567 1.3 22443.3 4160 84947.9 353383224 353 0 .8
Q3 2024 98776.6 1160 373869.3 433688364 434 1.0 24410.1 519 92392.2 47951566.6 48 0 .1
Totals 8015470.81 120.6 331 65 93 .9 42.1
Table G-1
Quarterly Calculation of Chloroform Removed and Total Volume of Water Pumped
TW4-19 TW4-20
Total Total Pumped Total Total Total Total Pumped Total Total Quarter Pumped Cone Total (ug) Cone Total (ug)
(gal) (liters) (grams) (pounds) Pumped (gal) (liters) (grams) (pounds)
QI 2007 6768986 2660 25620612.0 68150827947 68151 150.2 642290 16240 2431067.7 3.9481E+I0 39481 87.0
Q2 2007 605400 8 2291439.0 18331512 18 0.0 163520 1800 618923.2 1114061760 1114 2 .5
Q3 2007 316080 1100 1196362.8 1315999080 1316 2.9 70360 5200 266312.6 1384825520 1385 3 .1
Q4 2007 334350 1100 1265514.8 1392066225 1392 3 , I 63630 9000 240839.6 2167555950 2168 4.8
QI 2008 304784 1800 1153607.4 2076493392 2076 4.6 66520 13000 251778 .2 3273116600 3273 7.2
Q2 2008 380310 IO00 1439473.4 1439473350 1439 3.2 39350 30000 148977.6 4469328000 4469 9.9
Q3 2008 529020 3600 2002340.7 7208426520 7208 15.9 53260 21000 201589.1 4233371100 4233 9.3
Q4 2008 589620 4200 2231711.7 9373189140 9373 20.7 50230 1000 190120.6 190120550 190 0.4
QI 2009 469100 1100 1775543 .5 1953097850 1953 4 .3 52050 8200 197009 .3 1615475850 1615 3.6
Q2 2009 450040 990 1703401.4 1686367386 1686 3 .7 49270 6800 186487.0 1268111260 1268 2 .8
Q3 2009 200650 6600 759460.3 5012437650 5012 II.I 51030 13000' 193148.6 2510931150 2511 5.5
Q4 2009 454205 4700 1719165.9 8080079848 8080 17.8 208790 15000 790270.2 l.l854E+ 10 11854 26.1
QI 20IO 348550 940 13 I 9261.8 1240106045 1240 2.7 14490 3500 54844.7 191956275 192 0.4
Q2 2010 453340 1800 1715891.9 3088605420 3089 6.8 39014.86 18000 147671.2 2658082412 2658 5.9
Q3 2010 116899.2 2000 442463.5 884926944 885 2.0 39098.3 15000 147987.1 2219805983 2220 4.9
Q4 2010 767970.5 1200 2906768.3 3488122011 3488 7.7 36752.5 24000 139108.2 3338597100 3339 7.4
QI 2011 454607 .9 3400 1720690.9 5850349065 5850 12 .9 37187.5 31000 140754.7 4363395313 4363 9.6
Q22011 159238.9 4000 602719 .2 2410876946 2411 5.3 67907.7 8100 257030.6 2081948220 2082 4.6
Q3 2011 141542.6 970 535738.7 519666578.8 520 I.I 72311.2 6800 273697.9 1861145666 1861 4.1
Q4201 I 147647.2 2200 558844.7 1229458234 1229 2.7 72089 .3 7900 272858.0 2155578204 2156 4.8
QI 2012 148747 650 563007.4 365954806.8 366 0.8 76306 11000 288818 .2 3177000310 3177 7.0
Q2 2012 172082.03 460 651330.5 299612022.4 300 0 .7 22956.43 36000 86890.1 3128043152 3128 6.9
03 2012 171345 950 648540.8 616113783.8 616 1.4 22025 13000 83364.6 1083740125 1084 2.4
Q4 2012 156653 1500 592931 .6 889397407.5 889 2 .0 20114 19000 76131.5 1446498310 1446 3.2
QI 2013 210908 4210 798286.8 3360787344 3361 7.4 18177 18500 68799.9 1272798983 1273 2.8
Q2 2013 226224 2070 856257.8 1772453729 1772 3.9 20252.4 26300 76655.3 2016035284 2016 4.4
Q3 2013 329460.1 8100 1247006.5 10100752476 10101 22.3 19731 26800 74681.8 2001473178 2001 4.4
Q4 2013 403974 942 1529041.6 1440357178 1440 3.2 19280.2 15700 72975 .6 1145716245 1146 2.5
QI 2014 304851 586 1153861.0 676162566.5 676 1.5 18781.6 17800 71088.4 1265372737 1265 2.8
02 2014 297660.0 810 I 126643 .1 912580911 913 2.0 18462.4 22100 69880.2 1544352066 1544 3.4
03 2014 309742.0 1410 1172373 .5 1653046593 1653 3 .6 17237.9 12400 65245.5 809043599 809 1.8
Q4 2014 198331.0 4310 750682.8 3235443019 3235 7.1 I 6341.8 23300 61853.7 1441191513 1441 3.2
QI 2015 60553 .0 4660 229193 ,1 1068039869 1068 2.4 15744 .7 19900 59593.7 1185914421 1186 2.6
Q2 2015 75102 .8 1570 284264.1 446294633 .9 446 1.0 18754 .1 17600 70984.3 1249323126 1249 2 .8
Q3 2015 116503.9 7860 440967 .3 3466002675 3466 7.6 17657 .3 17000 66832 .9 1136158969 1136 2 .5
04 2015 112762.7 7840 426806.8 3346165465 3346 7.4 15547.4 17000 58846.9 1000397453 IO00 2.2
QI 2016 116597.0 7780 441319.6 3433466838 3433 7.6 14353.5 21600 54328 .0 1173484746 1173 2.6
Q2 2016 123768.0 12600 468461.9 5902619688 5903 13 .0 15818.3 33700 59872.3 2017695347 2018 4.4
Q3 2016 103609.0 6040 392160.1 2368646793 2369 5.2 12186.6 23600 46126.3 1088580232 1089 2.4
Q4 2016 104919.4 6640 397119.9 2636876329 2637 5.8 12879.6 21300 48749.3 1038359792 1038 2.3
QI 2017 I 10416 .7 1240 417927 .2 518229739.8 518 I.I 13552.8 23400 51297.3 1200357943 1200 2.6
02 2017 109943.0 510 416134.3 212228470.1 212 0.5 12475 .3 18100 47219.0 854664090 855 1.9
Q3 2017 112626.4 8840 426290.9 3768411768 3768 8.3 14556.8 27600 55097.5 1520690669 1521 3.4
Q4 2017 108891.2 129 412153 .2 53167761.77 53 0.1 14271.0 11600 54015 .7 626582526 627 1.4
Table G-1
Quarterly Calculation of Chloroform Removed and Total Volume of Water Pumped
TW4 -19 TW4-20
Total Total Pumped Total Total Total Total Pumped Total Total Quarter Pumped Cone Total (ug) Cone Total (ug)
(eat) (liters) (grams) (pounds) Pumped (gal) (liters) (grams) (pounds)
QI 2018 109856 .3 2640 415806.1 1097728092 1098 2 .4 14258.4 15400 53968.0 831107878 831 1.8
Q2 2018 111271.4 2980 421162.2 1255063502 1255 2.8 13367.6 12000 50596.4 607156392 607 1.3
Q3 2018 105821.8 1910 400535.5 765022829.8 765 l. 7 12443 .6 10500 47099.0 494539773 495 l.l
Q4 2018 107197.4 5270 405742 .2 2138261178 2138 4 .7 12841.l 9500 48603.5 461733494 462 1.0
QI 2019 116132.8 2050 439562 .6 90 l I 03428.4 901 2.0 14623 .9 15600 55351.5 863482799 863 1.9
Q2 2019 100704.0 11500 381164.6 4383393360 4383 9.7 13439.1 13700 50867.0 696877811 697 1.5
Q3 2019 101026.8 6670 382386.4 2550517541 2551 5.6 13787.0 10500 52183.8 547929848 548 1.2
Q4 2019 98806.8 551 373983.7 206065039.6 206 0.5 8317.69 8790 31482.5 276730794 277 0.6
QI 2020 96857.9 8720 366607.2 3196814361 3197 7.0 9505.05 14300 35976.6 514465584 514 l.l
Q2 2020 136619.7 7600 517105 .6 3930002290 3930 8.7 100713.8 5800 381201.6 2210969393 2211 4 .9
Q3 2020 154514.4 1350 584837 .0 789529955.4 790 1.7 12476.2 Well collaosed and not samoled
Q4 2020 144512.0 660 546977.9 361005427 .2 361 0 .8 Well plugged and abandoned
QI 2021 133462.3 6660 505154.8 3364331005 3364 7.4 Well plugged and abandoned
Q2 2021 151242.8 775 572454.0 443651848.5 444 1.0 Well olugged and abandoned
Q3 2021 157632.4 4450 596638.6 2655041921 2655 5.9 Well plugi!,ed and abandoned
Q4 2021 124359.9 6950 470702.2 3271380439 3271 7.2 Well olugged and abandoned
QI 2022 112209.2 654 424711.8 277761531.6 278 0 .6 Well olugged and abandoned
02 2022 123246.5 2540 466488 .0 1184879526 1185 2 .6 Well plugged and abandoned
Q3 2022 137486.6 4750 520386.7 2471836850 2472 5.4 Well plugged and abandoned
Q4 2022 137474.5 7380 520341.0 3840116451 3840 8.5 Well plugged and abandoned
QI 2023 132291.8 230 500724 .3 115166591.7 115 0.3 Well plugged and abandoned
Q2 2023 117218.0 4850 443670 .3 2151800865 2152 4 .7 Well plugged and abandoned
Q3 2023 104098.2 198 394011.6 78014291.54 78 0 .2 Well plugged and abandoned
Q4 2023 104814.1 1660 396721.4 658557534.5 659 1.5 Well plugged and abandoned
QI 2024 106975.9 351 404903.8 142121227 .3 142 0.3 Well plugged and abandoned
Q2 2024 105708.8 1030 400107.8 412111042 .2 412 0.9 Well plugged and abandoned
Q3 2024 113619.9 716 430051.3 307916719.1 308 0 .7 Well plugged and ahm1doncd
To1 als 21 423 17 3.68 489.2 2582397.89 296 .2
Table G-1
Quarterly Calculation ofChlorofonn Removed and Total Volume of Water Pumped
TW4-4 TW4-22
Total Total Total Total Total Total Total Total Quarter Pumped Cone Pumped Total (ug) (grams) (pounds) Pumped Cone Pumped Total (ug) (grams) (pounds) (gal) (liters) (11:al) (liters)
QI 2007 NA NA NA NA NA NA NA NA NA NA NA NA
02 2007 NA NA NA NA NA NA NA NA NA NA NA NA
03 2007 NA NA NA NA NA NA NA NA NA NA NA NA
04 2007 NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Ql 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2009 NA NA NA NA NA NA NA NA NA NA NA NA
03 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2009 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2010 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2010 84513 .9 2000 319885.1 639770223 640 1.4 NA NA NA NA NA NA
Q3 2010 76916 .8 2100 291130.1 611373184.8 611 1.3 NA NA NA NA NA NA
Q4 2010 86872.1 1700 328810.9 558978527.5 559 1.2 NA NA NA NA NA NA
QI 2011 73360.0 1800 277667 .6 499801680 500 1.1 NA NA NA NA NA NA
022011 80334.6 1700 304066.5 516912983 .7 517 1.1 NA NA NA NA NA NA
Q3 2011 97535.0 1500 369170.0 553754962 .5 554 1.2 NA NA NA NA NA NA
Q4 201 I 109043.5 1500 412729.6 6 I 90944 71.3 619 1.4 NA NA NA NA NA NA
QI 2012 101616.8 1200 384619.6 461543505 .6 462 1.0 NA NA NA NA NA NA
02 2012 87759.1 1500 332168.2 498252290.3 498 I.I NA NA NA NA NA NA
Q3 2012 80006.0 1600 302822.7 484516336 485 I. I NA NA NA NA NA NA
Q4 2012 71596 1400 270990.9 379387204 379 0.8 NA NA NA NA NA NA
QI 2013 58716.8 1460 222243 .1 324474908.5 324 0.7 16677.4 10600 63124.0 669113965.4 669.1 1.5
Q2 2013 65603.4 1330 248308.9 330250795.8 330 0.7 25523 .2 12500 96605 .3 1207566400.0 1207 .6 2.7
Q3 2013 63515.4 1380 240405 .8 331759988.8 332 0.7 25592.9 9640 96869.1 933818379.5 933.8 2.1
04 2013 60233.6 1360 227984.2 3100584 79.4 310 0.7 24952.2 13300 94444 ,1 1256106224. l 1256.1 2.8
QI 2014 58992.9 1260 223288.1 281343039.4 281 0.6 24532 .0 12100 92853 .6 l 123528802.0 1123.5 2.5
Q2 2014 60235.3 1220 227990.6 278148544 .8 278 0.6 24 I 93 .9 12400 91573 .9 11355 I 6502 .6 1135.5 2.5
03 2014 69229.4 1320 262033 .3 345883928.3 346 0.8 24610 .9 12400 93152.3 I 155087980.6 1155 .1 2 .5
Q4 2014 64422.6 1130 243839 .5 275538681.3 276 0.6 23956.9 12400 90676.9 1124393144 .6 1124.4 2.5
Ql 2015 36941.3 1350 139822.8 188760807. 7 189 0.4 22046.9 12700 83447.5 I 059783459 .6 1059.8 2 .3
Q2 2015 68162.8 1280 257996.2 330235 I 33.4 330 0 .7 23 I 91.6 8050 87780.2 706630658 .3 706 .6 1.6
Q3 2015 64333.0 1220 243500.4 297070494.1 297 0.7 24619.9 7810 93186.3 727785170 .9 727.8 1.6
Q42015 59235 .1 1190 224204 .9 266803775.7 267 0.6 23657.6 7530 89544.0 674266440.5 674 .3 1.5
QI 2016 57274 ,0 1190 216782 .1 257970687. I 258 0.6 24517.8 6070 92799.9 563295229.1 563.3 1.2
02 2016 61378.0 1780 232315.7 41352 I 999.4 414 0.9 26506.3 8570 I 00326.3 859796780.9 859.8 1.9
Q3 2016 50104.2 1380 189644.4 261709267.9 262 0.6 22144.1 5840 83815.4 489482044.0 489 .5 I.I
04 2016 31656.0 1430 119818.0 171339682 .8 171 0.4 23646.8 3370 89503.1 301625575.1 301.6 0.7
QI 2017 23526.8 1290 89048 ,9 I 14873130 115 0.3 24066.2 5320 91090.6 484601816.4 484 .6 I.I
Q2 2017 23244.9 1290 87981.9 113496711 113 0.3 23685.0 3670 89647 .7 329007150.8 329,0 0.7
Q3 2017 23937.3 1290 90602 .7 116877457 .8 117 0.3 24583 .2 5150 93047.4 479194171.8 479 .2 I.I
Q4 2017 22900.6 1120 86678 .8 97080223.52 97 0.2 23779 .6 4770 90005 .8 429327599 .2 429.3 0 .9
Table G-1
_Quarterly Calculation of Chloroform Removed and Total Volume of Water Pumped
TW4-4 TW4-22
Total Total Total Total Total Total Total Total Quarter Pumped Cone Pumped Total (ug) (grams) (pounds) Pumped Cone Pumped Total (ug) (grams) (pounds) (e:al) (liters) (gal) (liters)
QI 2018 23103.4 1160 87446.4 101437788 101 0.2 23982 .8 4530 90774.9 411210287 .9 411.2 0.9
Q2 2018 18137.0 1050 68648.5 72080972.25 72 0.2 23256.6 3010 88026 .2 264958955.3 265.0 0.6
Q3 2018 15366 .0 1030 58 I 60.3 59905119.3 60 0.1 21248.7 3600 80426.3 289534786 .2 289 .5 0.6
Q4 2018 15420.2 1140 58365.5 66536620.98 67 0.1 24171.0 2680 91487.2 245185789.8 245.2 0.5
QI 2019 16655.0 1050 63039.2 66191133.75 66 0.1 26149.9 4310 98977.4 4265924 71.2 426.6 0.9
Q2 2019 14311.9 1070 54170 .5 57962479.41 58 0.1 23073.1 4690 87331.7 409585595 .6 409.6 0.9
Q3 2019 14520.0 989 54958.2 54353659.8 54 0.1 24711.7 3460 93533.8 323626894.4 323 .6 0.7
Q4 2019 14399.8 1140 54503 .2 62133697.02 62 0.1 24052.5 3820 91038 .7 347767881.8 347.8 0.8
QI 2020 14439.2 1100 54652.4 60117609.2 60 0.1 24746.1 3910 93664.0 366226195.0 366.2 0.8
Q2 2020 15347.0 1140 58088.4 66220770.3 66 0.1 25295.3 2530 95742 .7 242229057.6 242.2 0.5
Q3 2020 14389.9 1110 54465.8 60457006.37 60 0.1 23050.6 3760 87246.5 328046919.0 328.0 0.7
Q4 2020 15061.5 979 57007.8 55810614.17 56 0.1 22866.1 3640 86548.2 315035406.1 315.0 0.7
QI 2021 13740.8 1130 52008.9 58770088.64 59 0.1 22605 .6 5100 85562 .2 436367 I 99.6 436.4 1.0
Q2 2021 13425 .7 1240 50816.3 63012180.38 63 0.1 22893 .3 4520 86651.1 391663155.1 391.7 0.9
Q3 2021 12021.0 1100 45499.5 50049433 .5 50 0.1 22272.5 3510 84301.4 295897957.9 295 .9 0.7
04 2021 11401.l 950 43153.2 40995505.33 41 0.1 22667.3 3330 85795.7 285699782.6 285.7 0.6
QI 2022 10434.1 1010 39493 .1 39887999.19 40 0.1 22083 .6 3320 83586.4 277506934.3 277.5 0.6
Q2 2022 11463 .2 1110 43388.2 48 I 609 I 5.32 48 0.1 22489.0 2600 85120.9 221314249.0 221.3 0.5
Q3 2022 7928.5 1040 30009.4 31209747.4 31 0.1 21940.2 3190 83043.7 264909265.8 264.9 0.6
Q4 2022 8777.0 1030 33220.9 34217573.35 34 0.1 22398.4 2350 84777.9 199228168.4 199 .2 0.4
QI 2023 8236.0 945 31173.3 29458730.7 29 0.1 21783.0 1900 82448.7 156652444.5 156.7 0.3
Q2 2023 7407 .0 1980 28035.5 55510280.1 56 0.1 22375.4 3330 84690.9 282020660.4 282.0 0.6
Q3 2023 8580.2 1020 32476.1 33125578. l 4 33 0 .1 23422.7 1890 88654 .9 167557797.9 167.6 0.4
Q4 2023 5943.9 1530 22497.7 34421422 .1 34 0.1 20555.5 3460 77802.6 269196883.6 269.2 0.6
QI 2024 6295.6 996 23828.8 23733530.62 24 0.1 21759.4 2180 82359.3 17954333 7 .2 179 .5 0.4
Q2 2024 5724.5 1620 21667.2 35 I 00916.65 35 0.1 21916 .0 3670 82952. l 304434060.2 304.4 0.7
Q3 2024 5884.5 1190 22272.8 26504670.68 27 0 .1 24076.0 2140 91127.7 195013192.4 195.0 0.4
Totals 2301611.2 27 .2 I 098326 .7 52 .0
Tab le G-1
Quarterly Calculation of Chloroform Removed and Total Volume of Water Pumped
TW4-24 TW4-25
Total Total Total Total Total Total Total Total Quarter Pumped Cone Pumped Total (ug) Pumped Cone Pumped Total (ug)
(eall (liters) (grams) (pounds) (e:al) (liters) (grams) (pounds)
QI 2007 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2007 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2007 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2007 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2008 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2009 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2010 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2010 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2010 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
QI 2011 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 201 I 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
Q4201 I NA NA NA NA NA NA NA NA NA NA NA NA
QI 2012 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
Q3 2012 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
QI 2013 144842.6 5.7 548229.2 3124906 .7 3.1 0.0 99369.9 0.0 376115 ,) 0 .0 0.0 0.0
Q2 2013 187509.3 17 .4 709722.7 12349175.0 12.3 0.0 147310.4 0 .0 557569 .9 0.0 0 ,0 0.0
Q3 2013 267703.5 21.8 1013257 .7 22089018.9 22.1 0.1 145840.9 0 .0 552007 .8 0.0 0.0 0.0
Q4 2013 260555.3 32.5 986201.8 32051558.8 32.1 0.1 126576 .5 0.0 479092 .1 0.0 0 ,0 0.0
QI 2014 229063.9 78 .5 867006.9 68060038.6 68 .1 0.2 129979.2 0.0 491971.3 0.0 0 .0 0.0
Q2 2014 216984.1 62.7 821284.8 51494558.1 51.5 0 .1 124829.8 0.0 472480.8 0.0 0.0 0.0
Q3 2014 213652.5 76.3 808674 . 7 61701880.6 61.7 0.1 119663.9 0.0 452927.9 0.0 0.0 0.0
Q4 2014 178468.7 25 ,8 675504 .0 17428004.0 17.4 0 .04 107416.1 0.0 406569 .9 0 .0 0.0 0.0
QI 2015 92449.3 49 .2 349920.6 17216093 .5 17 .2 0.04 71452.4 0 .0 270447.3 0 .0 0 .0 0 .0
Q2 2015 62664 .2 4.28 237184.0 1015147.5 1.0 0.002 91985.3 0 .0 348164.4 0.0 0 .0 0.0
Q3 2015 66313 .2 46.9 250995 .5 11771687 .2 11.8 0.026 124137.1 0.0 469858.9 0.0 0 .0 0.0
Q4 2015 107799.1 25.3 408019:6 10322895 .7 10.3 0.023 116420.1 0.0 440650.1 0.0 0.0 0 .0
QI 2016 100063.2 22.8 378739.2 8635254.0 8.6 0.019 115483.2 0.0 437103.9 0.0 0.0 0.0
Q2 2016 65233 .6 69 ,6 246909.2 17184878.6 17.2 0,038 125606.0 0 .0 475418.7 0.0 0.0 0.0
Q3 2016 51765 .8 17 ,8 195933.6 3487617 .2 3.5 0.008 104983.6 0 .0 397362.9 0.0 0.0 0.0
Q4 2016 99522 .5 20.8 376692.7 7835207.4 7.8 0.017 98681.2 0.0 373508.3 0.0 0.0 0.0
QI 2017 99117.4 18.3 375159.4 6865416.3 6.9 0.015 161.2 1.15 610.1 701.7 0.0 0.0
02 2017 52808.7 17.2 199880.9 3437952.0 3.4 0.008 101617 .2 0.0 384621.1 0.0 0 .0 0.0
Q3 2017 55574.6 17.8 210349.9 3744227.5 3 .7 0.008 124138.4 0,0 469863.8 0.0 0.0 0.0
Q4 2017 106021.4 16.0 401291.0 6420656 .0 6.4 0.014 116731.9 0.0 441830,2 0.0 0,0 0.0
Table G-1
Quarterly Calculation of Chloroform Removed and Total Volume of Water Pumped
TW4-24 TW4-25
Total Total Total Total Total Total Total Total Quarter Pumped Cone Pumped Total (ug) (grams) (pounds) Pumped Cone Pumped Total (ug) (grams) (pounds) (eal) (liters) (eal) (liters)
QI 2018 96900 .2 24 .9 366767 .3 9132504.7 9.1 0.020 116991.7 0.0 442813.6 0.0 0.0 0.0
Q2 2018 53117.9 49.2 201051.3 9891721.6 9.9 0.022 117758 .3 0,0 445715 .2 0.0 0.0 0.0
03 2018 53142 .5 35 .0 201144.4 7040052 .7 7.0 0.016 111657.5 0.0 422623.6 0 .0 0.0 0.0
042018 101606.4 21.0 384580.3 8076185 .5 8.1 0,018 114458.2 0.0 433224.3 0.0 0.0 0.0
QI 2019 97701.0 28.1 369798 .3 10391331.8 10.4 0.023 90789.5 0.0 343638.3 0.0 0.0 0.0
02 2019 53197.3 28 .8 201351.8 5798931.3 5.8 0.013 88302.0 0.0 334223.1 0.0 0.0 0.0
Q3 2019 54445.7 31.1 206077.0 6408993.9 6.4 0.014 87609 .5 0.0 331602.0 0.0 0.0 0.0
Q4 2019 102211.02 43.3 386868 .7 16751415 .2 16.8 0.037 85928.53 0.0 325239.5 0.0 0.0 0.0
QI 2020 86344.38 61.7 326813.5 20164391.6 20 .2 0.044 85049.47 0.0 321912.2 0.0 0.0 0.0
Q2 2020 57634 .7 49 .4 218147 .3 10776478.6 10 .8 0.024 90767 .9 0.0 343556.6 0.0 0.0 0.0
Q3 2020 53316.1 63.8 201801.4 12874931.8 12 .9 0.028 83956.3 0.0 317774.6 0.0 0.0 0.0
Q4 2020 103987.2 72.6 393591.6 28574746.7 28 .6 0.063 86254.4 0.0 326472 .7 0.0 0.0 0.0
QI 2021 81891.2 96.2 309958 .3 29817985.4 29 .8 0.066 80272.2 0.0 303830.4 0.0 0.0 0.0
Q2 2021 54377.9 41.2 205820.4 8479798 .5 8.5 0.019 82692 .8 0,0 312992.2 0.0 0.0 0.0
Q3 2021 53333.1 103.0 201865.8 20792175.7 20 .8 0.046 82802.3 0.0 313406 .7 0.0 0.0 0.0
04 2021 96534.8 112.0 365384.2 40923032.4 40 .9 0.090 89361.5 0.0 338233.3 0.0 0.0 0.0
QI 2022 73545 .0 114.0 278367.8 31733932.1 31.7 0.070 92972.1 0.0 351899.4 0.0 0.0 0.0
02 2022 50341.7 124.0 190543.3 23627373.5 23 .6 0.052 101724.9 0.0 385028.7 0.0 0.0 0.0
Q3 2022 58456 .5 88 .9 221257.7 19669806.3 19.7 0.043 98357 .6 0.0 372283 .7 0.0 0.0 0.0
Q4 2022 100289.8 79 .5 379596 .9 30177956.0 30.2 0.067 95056.0 0.0 359787 .1 0.0 0.0 0.0
QI 2023 75424.5 95.5 285481 .6 27263491.0 27 .3 0,060 87269.8 0.0 330316.2 0.0 0.0 0.0
02 2023 52081 .4 58.5 197128 .0 11531987.1 11.5 0.025 94118.3 0.0 356237.8 0.0 0.0 0.0
Q3 2023 57213.1 65 .7 216551.7 14227449.0 14 .2 0.031 117564 .3 0.0 444981.0 0.0 0.0 0.0
Q4 2023 86337.4 168 .0 326787.1 54900225.9 54 .9 0.121 100409 .1 0.0 380048.3 0.0 0.0 0.0
QI 2024 75577.5 87 .6 286061.0 25058939 .3 25 .1 0.055 105631.3 0.0 399814.5 0.0 0.0 0.0
Q2 2024 53174.6 66 .2 201265.9 13323800.0 13.3 0.029 105707.7 0.0 400103.6 0.0 0.0 0.0
Q3 2024 59179.9 76.4 223996.0 17113291.3 17.1 0.038 119012.7 0.0 450463.1 0.0 0.0 0.0
Totals 4599475 .7 2.0 4804860 .3 0.0
Table G-1
Quarterly Calculation of Chloroform Removed and Total Volume of Water Pumped
TW4-0I TW4-02
Total Total Total Total Total Total Total Total Quarter Pumped Cone Pumped Total (ug) (grams) (pounds) Pumped Cone Pumped Total (ug) (grams) (pounds) (gal) (liters) (gal) (liters)
QI 2007 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2007 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2007 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2007 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2008 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2009 NA NA NA NA NA NA NA NA NA NA NA NA
QI 20!0 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2010 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2010 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
QI 2011 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
Q3 2011 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
QI 2012 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
Q3 2012 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
QI 2013 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
Q3 2013 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
QI 2014 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
Q3 2014 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
QI 2015 24569.2 1130 92994.4 I 05083696.9 105 .1 0 .23 24156 .7 1840 91433.1 168236921.5 168.2 0.37
Q22015 23989.9 1260 90801.8 114410232 .1 114.4 0 .25 22029.9 1650 83383.2 137582233.0 137.6 0.30
Q3 2015 23652 .0 1060 89522.8 94894189.2 94 .9 0 .21 21586.9 1310 81706.4 I 07035405 .6 107 .0 0.24
Q4 2015 20764.3 1040 78592.9 81736590 .5 81.7 0.18 21769.8 2070 82398.7 170565294.5 170.6 0.38
QI 2016 19255.6 974 72882.4 70987502.4 71.0 0.16 20944.6 1970 79275.3 156172362.7 156.2 0.34
Q2 2016 19588.2 1140 74141.3 84521124 .2 84 .5 0.19 20624.0 2070 78061.8 I 6 I 588008.8 161.6 0.36
Q3 2016 15613.5 1160 59097 .1 68552633.1 68 .6 0.15 17487.4 1780 66189 .8 1178 I 7860.0 117 .8 0.26
Q4 2016 16756.8 1330 63424.5 84354569.0 84 .4 0.19 19740.6 1600 74718.2 I 19549073 .6 119 .5 0.26
QI 2017 16931.8 519 64086 .9 3326I081.9 33.3 0.07 19869.7 1570 75206.8 I I 8074698.8 118.1 0.26
Q2 2017 18200.2 977 68887.8 67303338.6 67 .3 0 .15 18716.7 1940 70842.7 137434856 .4 137.4 0.30
Q3 2017 17413 .6 958 65910.5 63142236 .0 63 .1 0 .14 19338.8 1310 73197.4 95888539.0 95 .9 0.21
Q4 2017 14089.8 556 53329 .9 29651420.5 29.7 0.07 17327 .6 1610 65585 .0 105591795 .3 105 .6 0.23
Table G-1
_Quarterly Calculation of Chloroform Remov_(:_d and Total Volume of Water Pumped
TW4-0J TW4-02
Total Total Total Total Total Total Total Total Quarter Pumped Cone Pumped Total (ug) (grams) (pounds) Pumped Cone Pumped Total (ug) (grams) (pounds) (eall (liters) (eall (liters)
QI 2018 12505.7 70.4 47334.1 3332318.8 3.3 0.01 16232.3 764 61439.3 46939591 .2 46.9 0.10
Q2 2018 10814.8 942 40934 .0 38559845.0 38 .6 0.09 16051.4 949 60754.5 57656067.0 57.7 0.13
Q3 2018 9727.3 1010 36817.8 37186008.8 37.2 0.08 14927.2 980 56499.5 55369463.0 55.4 0.12
Q4 2018 9836.7 752 37231.9 27998395.9 28.0 0.06 15464.1 822 58531.6 48112990.4 48.1 0.11
QI 2019 10603.6 87.2 40134.6 3499739.4 3.50 0.01 16169.9 1040 .0 61203.1 63651194.4 63.65 0.14
Q2 2019 9393.9 1040.0 35555.9 36978148.0 36.98 0 .08 13893.7 1360 .0 52587.7 71519210.1 71.52 0.16
Q3 2019 9734.1 894 36843.6 32938150.2 32 .94 0.07 14106.9 797 53394.6 42555509.4 42.56 0.09
Q4 2019 9184.3 1070 34762.6 37195955.8 37.20 0.08 14220.9 934 53826.1 50273583 .5 50.27 0.11
QI 2020 8796.7 1190 33295.5 39621656.3 39.62 0.09 13162.1 1880 49818.5 93658871.2 93.66 0.21
Q2 2020 9600.2 499 36336.8 18132041.7 18.13 0.04 14155.6 1070 53578 .9 57329472.2 57 .33 0.13
Q3 2020 9487.3 1060 35909.4 38063996.3 38 .06 0.08 14009.5 1260 53026.0 66812706.5 66.81 0.15
Q4 2020 9318.7 924 35271.3 32590662.3 32.59 0.07 14582.9 1130 55196.3 62371792.4 62.37 0.14
QI 2021 9066.4 948 34316.3 32531875.2 32.53 0.07 13189.6 939 49922.6 46877355 .2 46.88 0.10
Q2 2021 8764 .1 957 33172.1 31745717.4 31.75 0.07 11975.9 1160 45328.8 52581386.5 52.58 0.12
Q3 2021 8677.2 821 32843.2 26964268.8 26.96 0.06 12694.5 1150 48048.7 55255984 .9 55 .26 0.12
Q4 2021 8873.4 957 33585.8 32141628.8 32.14 0.07 12351.3 852 46749.7 39830719.3 39.83 0.09
QI 2022 8251.8 946 31233.1 29546477.6 29.55 0.07 11380.6 1020 43075.6 43937082.4 43 ,94 0.10
Q2 2022 7616.0 914 28826.6 26347475 .8 26 .35 0.06 11518 , 1 892 43596 .0 38887639.6 38.89 0.09
Q3 2022 8512.1 954 32218.3 30736256.8 30.74 0.07 10953.7 832 41459 .8 34494515.7 34.49 0.08
Q4 2022 8450.8 1010 31986.3 32306140.8 32.31 0.07 12148 .6 1030 45982 .5 47361924.5 47.36 0.10
QI 2023 7985.1 928 30223.6 28047504.0 28 .05 0.06 I 0275.4 772 38892.4 30024924.3 30.02 0.07
Q2 2023 7825.6 830 29619.9 24584513 .7 24 .58 0.05 I 1931.8 788 45161.9 35587548.0 35 .59 0.08
Q3 2023 8419.4 891 31867.4 28393879.2 28.39 0.06 I 1513 .8 867 43579.7 37783628.5 37.78 0.08
Q4 2023 7329.3 1360 27741.4 37728304.7 37 ,73 0.08 10133 .2 1200 38354.2 46024994.4 46.02 0.10
QI 2024 7636.8 832 28905.3 24049199.6 24.05 0.05 10605.4 925 40141.4 37130831.1 37 .13 0.08
Q2 2024 7755 .6 1400 29354.9 41096924.4 41.10 0.09 10395 .1 1480 39345.5 58231271.2 58.23 0.13
Q3 2024 7941.6 995 30059 .0 29908661.2 29.91 0 .07 11429.8 10 30 43261.8 44559646.8 44.56 0.10
Totals 472933 .4 3.7 593066.0 6.5
Table G-1
Quarterly Calculation of Chloroform Removed and Total Volume of Water Pumped
TW4-ll TW4-21
Total Total Total Total Total Total Total Total Quarter Pumped Cone Pumped Total (ug) (grams) (pounds) Pumped Cone Pumped Total (ug) (grams) (pounds) (2al) (liters) (1ml) (liters)
QI 2007 NA NA NA NA NA NA NA NA NA NA NA NA
02 2007 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2007 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2007 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2008 NA NA NA NA NA NA NA NA NA NA NA NA
02 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2008 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2009 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2010 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2010 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2010 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
QI 2011 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
03 2011 NA NA NA NA NA NA NA NA NA NA NA NA
04 2011 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2012 NA NA NA NA NA NA NA NA NA NA NA NA
02 2012 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
Q4 2012 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2013 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
Q3 2013 NA NA NA NA NA NA NA NA NA NA NA NA
04 2013 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2014 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
03 2014 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
QI 2015 9898 .7 2450 37466.6 91793119.8 91.8 0.20 NA NA NA NA NA NA
Q2 2015 5243.3 2710 19845 .9 53782363.3 53 .8 0.12 30743 .7 366 I 16364.9 42589555 .0 42.6 0.09
Q3 2015 3584.4 1120 13567 .0 15194988.5 15 .2 0.03 125285.4 281 474205 .2 133251672.2 133.3 0.29
04 2015 4110.3 2730 15557.5 42471935 .4 42.5 0.09 134774.9 339 510123 .0 172931695.8 172.9 0.38
QI 2016 3676.2 2660 13914.4 37012349.2 37 .0 0.08 125513 .3 390 475067.8 185276457 .8 185.3 0.41
02 2016 3760.4 3340 14233.1 47538600.8 47 .5 0.10 132248 ,7 545 500561.3 272805924.6 272.8 0.60
Q3 2016 2953.8 3200 I I 180 .1 35776425 .6 35.8 0.08 110381.9 456 417795.5 190514744.1 190 ,5 0.42
Q4 2016 3050.2 3180 11545 .0 36713122.3 36.7 0.08 130311.3 434 493228.3 214061069 ,4 214.1 0.47
QI 2017 2984.2 3310 11295 .2 37387102.1 37.4 0.08 54333.5 598 205652.3 122980073.9 123 .0 0.27
Q2 2017 2845 .9 3370 I 0771. 7 36300735 .2 36.3 0.08 60969.7 224 230770.3 5 I 692550.4 5 I. 7 0.1 I
Q3 2017 2830 .0 3290 10711.6 35240999.5 35 .2 0,08 120116,2 537 454639.8 244141581.7 244.1 0.54
Q4 2017 2612 .7 2880 9889. I 28480520.2 28 .5 0.06 126492.5 466 478774 .1 223108736.4 223.1 0.49
Table G-1
Quart erly Calculation of Chloroform Removed and Total Volume of Water Pumped
TW4-11 TW4-21
Total Total Total Total Total Total Total Total Quarter Pumped Cone Pumped Total (ug) (grams) (pounds) Pumped Cone Pumped Total (ug) (grams) (pounds) (gal) (liters) (gal) (liters)
QI 2018 2571.0 3090 9731 ,2 30069516.2 30 .1 0,07 117832.0 421 445994.1 187763524.5 187.8 0.41
02 2018 2513 .5 2800 9513.6 26638073 .0 26.6 0.06 116681.0 532 441637 .6 234951195 .2 235.0 0.52
Q3 2018 2170.2 3050 8214 .2 25053331 .4 25.1 0.06 110001.4 476 416355.3 198185122.3 198.2 0.44
04 2018 2379.5 2930 9006.4 26388774.0 26.4 0.06 121686.3 585 460582.8 269440914.0 269.4 0.59
QI 2019 2342.4 2820 8866.0 25002074.9 25.00 0.06 123264 323 466554.6 150697141.8 150.70 0.3
Q2 2019 2195.1 2970 8308 .5 24676106 .9 24 .68 0.05 106893 ,6 734 404592.3 296970730.6 297 .0 0.7
Q3 2019 2046.0 2790 7744.1 21606066 .9 21.61 0.05 108132.9 596 409283.0 243932683 .8 243.9 0.5
Q4 2019 1983 .9 3250 7509.1 24404449 .9 24.40 0.05 116167.55 794 439694.2 349117176.3 349.1 0.8
QI 2020 1947 .4 2990 7370.9 22039017 .9 22.04 0.05 106622.01 844 403564.3 340608275 .8 340.6 0.8
Q2 2020 2003 .9 2810 7584.8 21313179 .8 21.31 0.05 110999 .13 767 420131.7 322241019.3 322.2 0.7
Q3 2020 1784.1 3070 6752.8 20731152.8 20.73 0 .05 99515 .11 920 376664.7 346531516.0 346.5 0 .8
Q4 2020 1394.6 2670 5278 .6 14093757 .9 14 .09 0.03 107061.16 948 405226.5 384154713.1 384 .2 0.8
QI 2021 2195 .1 2750 8308.5 22848455.3 22.85 0.05 97211.49 400 367945.5 147178195.9 147 .2 0 .3
Q2 2021 1694.5 3320 6413 .7 21293425.9 21.29 0.05 97157 .60 1130 367741.5 415547913.1 415 .5 0.9
03 2021 1560.8 2600 5907 .6 15359832.8 15.36 0.03 93390.40 669 353482.7 236479902 .2 236 .5 0.5
Q4 2021 1485.5 2850 5622.6 16024459.9 16 .02 0.04 102535 .00 649 388095.0 251873638.8 251.9 0.6
QI 2022 1497 .2 2780 5666.9 15753987.6 15.75 0,03 91105.40 469 344833.9 161727117.4 161.7 0.4
Q2 2022 1473 ,1 2550 5575. 7 14217992.9 14.22 0.03 91682.50 657 347018 .3 227990998.5 228 .0 0.5
03 2022 1304.3 3020 4936.9 14909290.6 14 .91 0.03 87160.0 1070 329900.7 352993763.5 353.0 0.8
Q4 2022 1442.4 2900 5459.5 15832503.6 15 .83 0.03 94463 .6 482 357544.6 172336503 .2 172.3 0.4
QI 2023 1326.4 2430 5020 .3 12199446.4 12 .20 0.03 83943.5 526 317726.1 167123933 .7 167.1 0.4
Q2 2023 1159 .5 2510 4388 .6 11015275 .8 11.02 0 .02 83501.7 768 316053 .9 242729392 .6 242 .7 0.5
Q3 2023 1277 .7 2630 4835 .9 12718430.8 12 .72 0 .03 89276.6 49.7 337911.8 16794215 .4 16 .8 0.04
Q4 2023 1084.1 4180 4103.4 17152346.0 17 .15 0 .04 82763 .3 1630 313259 .2 510612502.6 510 .6 1.13
QI 2024 1278.9 2530 4840 .7 12247001.9 12 .25 0 .03 80835.1 523 305960.8 160017486.8 160.0 0.35
Q2 2024 1119.4 4110 4236 .9 17413778.2 17.41 0.04 79732.7 1210 301788.3 365163806.1 365.2 0.81
Q3 2024 1044.7 3200 3954.2 12653406.4 12.65 0 .03 85978 .1 866 325427.0 281819810.4 281.8 0.62
Totals 93825.3 2.2 3836764.3 19 .6
Table G-1
Quarterly Calculation of Chloroform Removed and Total Volume of Water Pumped
TW4-37 TW4-39
Total Total Total Total Total Total Total Total Quarter Pumped Cone Pumped Total (ug) (grams) (pounds) Pumped Cone Pumped Total (ug) (grams) (pounds) (gal) (liters) (gal) (liters)
QI 2007 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2007 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2007 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2007 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2008 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2008 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2009 NA NA NA NA NA NA NA NA NA NA NA NA
Q4 2009 NA NA NA NA NA NA NA NA NA NA NA NA
QI 2010 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2010 NA NA NA NA NA NA NA NA NA NA NA NA
Q3 2010 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
QI 2011 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 201 I NA NA NA NA NA NA NA NA NA NA NA NA
Q3 201 I 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
QI 2012 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
Q3 2012 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
QI 2013 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
Q3 2013 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
QI 2014 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
Q3 2014 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
QI 2015 NA NA NA NA NA NA NA NA NA NA NA NA
Q2 2015 29206.0 30200 I 10544 .7 3338450242.0 3338.5 7.4 NA NA NA NA NA NA
Q3 2015 118063.9 19100 446871.9 8535252554,7 8535 .3 18 .8 NA NA NA NA NA NA
Q4 2015 111737 ,5 19500 422926 .4 824 7065531.3 8247 .1 18.2 NA NA NA NA NA NA
QI 2016 111591.0 17500 422371.9 7391508862 .5 7391.5 16.3 NA NA NA NA NA NA
Q2 2016 119241.2 16200 451327.9 7311512660.4 7311.5 16 ,1 NA NA NA NA NA NA
Q3 2016 98377.6 • 15900 372359 5920511534.4 5920.5 13.1 NA NA NA NA NA NA
Q4 2016 101949.1 16400 385877 6328388433.4 6328.4 14.0 3598.3 2800 13620 38134783.4 38 . I 0.1
QI 2017 97071.7 18000 367416 66 I 3494921.0 6613 .5 14.6 103117 .8 6460 390301 2521343639.6 2521.3 5.56
Q2 2017 93191.3 15800 352729 5573119313.9 5573 .1 12.3 41313.0 5560 156370 869415559.8 869.4 1.92
Q3 2017 81749.3 15000 309421 4641316507 .5 4641.3 10 .2 34546.3 10000 130758 1307577455 .0 1307 .6 2.9
Q42017 87529.6 15500 331300 5135142808 .0 5135 .1 11.3 68180 .2 552 258062 142450255 .5 142 .5 0.3
Table G-1
Quarterly Calculation Qf_Chloroform Removed and Total Volume of Water Pumped
TW4-37 TW4-39
Total Total Total Total Total Total Total Total Quarter Pumped Cone Pumped Total (ug) Pumped Cone Pumped Total (ug)
(eel) (liters) (grams) (pounds) (eal) (liters) (grams) (pounds)
QI 2018 84769.3 12900 320852 4138988226 .5 4139 .0 9.1 59262 .2 2870 224307 643762315 .5 643.8 1.4
Q2 2018 83653.1 14400 316627 4559428562.4 4559.4 IO.I 34259 .8 7160 129673 928461135 .9 928.5 2.0
Q320!8 77457.8 14100 293178 4133806599.3 4133.8 9.1 33473.4 8180 126697 I 0363 79979.4 1036.4 2.3
Q4 2018 76271.4 15200 288687 4388046184.8 4388 .0 9 .7 37003.6 6520 140059 913182241.5 913.2 2.0
QI 2019 77591 13300 293683.4 3905989871.7 3906 ,0 8.6 49117 885 185907.5 164528107.9 164.5 0.4
Q2 2019 64950.1 16200 245836.1 3982545281. 7 3982.5 8.8 34285.7 8640 129771.4 I 121224675 .7 1121.2 2.5
Q3 2019 67572.0 11900 255760.0 3043544238.0 3043.5 6.7 36976.2 4240 139954.9 593408848.1 593.4 1.3
Q4 2019 66732.4 13100 252582.1 3308825955.4 3308.8 7.3 51808.6 1650 196095 .6 323557659.2 323 .6 0.7
QI 2020 65554 .2 12000 248122.6 2977471764 .0 2977.5 6.6 43169.3 812 163395 .8 132677390.0 132 .7 0.3
Q2 2020 65163 .8 11700 246645 .0 2885746301.1 2885 .7 6.4 37352.7 5870 141380.0 829900421 .0 829 .9 1.8
Q3 2020 56659.3 13800 214455.5 2959485216.9 2959.5 6.5 35628.2 5960 134852.7 803722312 .5 803 .7 1.8
Q4 2020 61323.9 10300 232111.0 2390742903.5 2390 .7 5.3 46794 .2 648 177116.0 114771198 .5 114.8 0.3
QI 2021 59907.4 9380 226749.5 2126910394.4 2126 ,9 4 .7 38932.4 2970 147359.1 437656628 .0 437.7 1.0
Q2 2021 58564.2 13000 221665 .5 2881651461.0 2881.7 6.4 32865 .2 2490 124394.8 309743007.2 309.7 0.7
Q3 2021 49987.5 10200 189202.7 1929867412 .5 1929 .9 4.3 31436.6 858 118987.5 102091301.6 102.1 0.2
Q4 2021 46649.1 14800 176566.8 2613189283 .8 2613.2 5.8 42730 .6 776 161735.3 125506609.1 125.5 0.3
QI 2022 42923.5 13700 162465.4 2225776630 .8 2225.8 4.9 35550.2 724 134557.5 97419635.1 97.4 0.2
Q2 2022 41998 .3 46800 158963.6 7439494865.4 7439.5 16.4 31354.2 982 118675.6 116539485.4 116 .5 0.3
03 2022 39640.3 11600 150038.5 17404470 I 1.8 1740.4 3.8 31305 .9 843 I I 8492.8 99889457.0 99 .9 0.2
Q4 2022 43251.9 9640 163708.4 1578149376.1 1578 .1 3.5 39072.6 1720 147889.8 254370440 .5 254.4 0.6
QI 2023 44536 .9 8010 168572.2 1350263053 . 7 1350.3 3.0 35659.0 1850 134969.3 249693232 .8 249 .7 0.6
Q2 2023 42641.9 8160 161399.6 1317020666.6 1317 .0 2.9 28777.7 3330 108923.6 362715569. 7 362.7 0.8
Q3 2023 46548.5 9620 176186.1 1694910017.5 1694 .9 3 .7 34299.4 3440 129823 .2 446591907 .8 446.6 1.0
Q4 2023 43126.4 14000 163233.4 2285267936.0 2285.3 5 .0 33586 .9 1200 127126.4 152551699 .8 152.6 0.3
QI 2024 44275.4 8860 167582.4 1484779966.5 1484 .8 3 .3 32186.4 893 121825.3 I 08790023.9 108.8 0.2
Q2 2024 43726.7 13500 165505.6 2234325053.3 2234 .3 4.9 29594.3 4380 112014.4 490623183. 7 490.6 I.I
Q3 2024 47533.7 10300 179915.1 I 853125061.4 1853.1 4.1 34313.4 866 129876.1 112472674.5 112.5 0.2
To1als 2592718 .6 322.9 1261551.1 35.2
Table G-1
Quarterly Calculation of Chloroform Removed and Total Volume of Water Pumped
TW4-40 TW4-41
Total Total Total Total Total Total Total Total Total Total Volume
Quarter Pumped Cone Pumped Total (ug) Pumped Cone Pumped Total (ug) Pumped
(2al) (liters) (grams) (pounds) (eall (liters) (grams) (pounds) (pounds) (2allons)
QI 2007 NA NA NA NA NA NA NA NA NA NA NA NA 286.9 9648896.0
Q2 2007 NA NA NA NA NA NA NA NA NA NA NA NA 4 .0 904550.0
Q3 2007 NA NA NA NA NA NA NA NA NA NA NA NA 9.0 559220.0
Q4 2007 NA NA NA NA NA NA NA NA NA NA NA NA 10.6 550560.0
QI 2008 NA NA NA NA NA NA NA NA NA NA NA NA 13.8 503034 .0
Q2 2008 NA NA NA NA NA NA NA NA NA NA NA NA 14 .8 527290.0
Q3 2008 NA NA NA NA NA NA NA NA NA NA NA NA 26.8 724960 ,0
Q4 2008 NA NA NA NA NA NA NA NA NA NA NA NA 22 .7 786870.0
QI 2009 NA NA NA NA NA NA NA NA NA NA NA NA 10.0 664830 .0
Q2 2009 NA NA NA NA NA NA NA NA NA NA NA NA 13 .5 1007400.0
Q3 2009 NA NA NA NA NA NA NA NA NA NA NA NA 18 .5 399710.0
Q4 2009 NA NA NA NA NA NA NA NA NA NA NA NA 49.4 1047335.0
QI 2010 NA NA NA NA NA NA NA NA NA NA NA NA 4 .5 492485.0
Q2 2010 NA NA NA NA NA NA NA NA NA NA NA NA 16 .5 721374 ,1
Q3 2010 NA NA NA NA NA NA NA NA NA NA NA NA 10.6 376623.4
Q4 2010 NA NA NA NA NA NA NA NA NA NA NA NA 17 .9 1041817 .3
QI 2011 NA NA NA NA NA NA NA NA NA NA NA NA 24.9 696533.0
Q2 201 I NA NA NA NA NA NA NA NA NA NA NA NA 13 .1 449131.1
Q3 2011 NA NA NA NA NA NA NA NA NA NA NA NA 8.1 462334.5
Q4201 l NA NA NA NA NA NA NA NA NA NA NA NA 10 .8 468706.3
QI 2012 NA NA NA NA NA NA NA NA NA NA NA NA 10 .6 448486 .3
Q2 2012 NA NA NA NA NA NA NA NA NA NA NA NA 10.4 400415.2
Q3 2012 NA NA NA NA NA NA NA NA NA NA NA NA 6.6 390229.0
Q4 2012 NA NA NA NA NA NA NA NA NA NA NA NA 7.1 358000.0
QI 2013 NA NA NA NA NA NA NA NA NA NA NA NA 13.7 634286.1
Q2 2013 NA NA NA NA NA NA NA NA NA NA NA NA 13 .5 768953.4
Q3 2013 NA NA NA NA NA NA NA NA NA NA NA NA 31.1 950505 .6
Q4 2013 NA NA NA NA NA NA NA NA NA NA NA NA 10.3 990119.8
Ql 2014 NA NA NA NA NA NA NA NA NA NA NA NA 8.6 859297.5
02 2014 NA NA NA NA NA NA NA NA NA NA NA NA 9.9 838057.9
Q3 2014 NA NA NA NA NA NA NA NA NA NA NA NA I 0.2 852987.2
Q4 2014 NA NA NA NA NA NA NA NA NA NA NA NA 14.6 673905 .9
QI 2015 NA NA NA NA NA NA NA NA NA NA NA NA 9.9 458271 .4
Q2 2015 NA NA NA NA NA NA NA NA NA NA NA NA 15 .3 539592 .9
Q3 2015 NA NA NA NA NA NA NA NA NA NA NA NA 33.4 816299 .8
Q4 2015 NA NA NA NA NA NA NA NA NA NA NA NA 32 .3 847567.8
QI 2016 NA NA NA NA NA NA NA NA NA NA NA NA 30.6 819302.3
Q2 2016 NA NA NA NA NA NA NA NA NA NA NA NA 39.4 832418.9
Q3 2016 NA NA NA NA NA NA NA NA NA NA NA NA 24 .7 686543.4
Q4 2016 NA NA NA NA NA NA NA NA NA NA NA NA 25 .6 750667.4
QI 2017 NA NA NA NA NA NA NA NA NA NA NA NA 27.2 667899 .1
Q2 2017 NA NA NA NA NA NA NA NA NA NA NA NA 19.6 657232 .5
03 2017 NA NA NA NA NA NA NA NA NA NA NA NA 28 .5 754250.1
Q4 2017 NA NA NA NA NA NA NA NA NA NA NA NA 16 .9 841953.7
Table G-1
Quarte rly Calculation of Chloroform Removed and Total Volume of Water Pumped
TW4-40 TW4-41
Total Total Total Total Total Total Total Total Total Total Volumr
Quarter Pumped Cone Pumped Total (ug) (grams) (pounds) Pumped Cone Pumped Total (ug) (grams) (pounds) (pounds) Pumped
(e:al) (liters) (2all (liters) (2allons)
QI 2018 NA NA NA NA NA NA NA NA NA NA NA NA 18 .0 810330.4
Q2 2018 NA NA NA NA NA NA 73711.2 1400 278997 390595648.8 390.6 0.9 20 .1 803034.5
03 2018 NA NA NA NA NA NA 44981.6 1390 170255 236654 734.4 236.7 0.5 17.6 733435.6
Q42018 NA NA NA NA NA NA 35431.6 1320 134108 177023110.1 177.0 0.4 20 .8 800443.6
QI 2019 NA NA NA NA NA NA 31904 1220 120755 ,1 147321253.7 147.3 0 .3 16.2 811589.4
Q2 2019 81762 .7 263 309471.8 81391088.5 81.4 0 ,18 25146.5 1320 95179.5 125636943.3 125.6 0.3 26.2 750139.6
03 2019 116414 .2 380 440627.7 167438543.9 167.4 0.37 24045.6 1190 91012.6 I 083 04989 .2 108.3 0.2 18.3 794827.4
Q4 2019 I 08281.89 314 409847 .0 I 2869 I 943.4 128.7 0.28 21186.4 1410 80190.5 I 13068638.8 113.1 0.2 13.0 844887.9
QI 2020 I 02021.5 I 364 386151.4 140559115 .2 140.6 0 .31 17289 .9 1200 65442.3 78530725 .8 78.5 0.2 18 .9 802209.2
Q2 2020 100757 .13 367 381365.7 139961225.5 140.0 0.31 17294.9 1220 65461.1 79862567 .4 79.9 0 .2 25.2 910974.8
Q3 2020 86264.50 333 326511.1 I 08728207 . I 108 .7 0 .24 13411.4 1110 50762 .3 56346111.4 56.3 0 .1 13.4 766734.5
Q4 2020 77535 .9 264 293473 .5 77477002 .7 77.5 0 .17 I 7765.7 1020 67243 .3 68588115 .2 68 .6 0.2 9 .6 828651.4
QI 2021 72543 .4 436 274576.7 I 19715421.8 119.7 0.26 13407 .5 1170 50747 .3 59374310.5 59.4 0.1 16 .8 759810 .1
Q22021 66866 .4 343 253089.3 86809638. I 86 .8 0.19 13168 .7 1130 49843 .5 56323188.3 56 .3 0.1 11.8 738065 .6
Q3 2021 58841.0 301 222713.2 67036668.7 67.0 0.15 13821.0 1100 52312 .5 57543733.5 57.5 0.1 13.4 716109 .4
Q4 2021 57357 .9 286 217099.7 62090500 .3 62 .1 0.14 12449.1 1030 47119.8 48533438.8 48.5 0.1 16.1 753893.2
QI 2022 53009.2 238 200639.8 47752277.6 47.8 0.11 12247.8 1030 46357.9 47748660.7 47 .7 0.1 8.4 692614.3
02 2022 52135 .2 323 197331.7 63738149.4 63 ,7 0.14 11013.9 1010 41687.6 42104487.6 42.1 0.1 21.8 680997.0
03 2022 45416 .2 302 171900.4 51913918.6 51.9 0.11 11108.0 1060 42043 .9 44566527.2 44.6 0.1 12.3 670819 .9
04 2022 48263 .2 298 I 82676 .1 54437488 .6 54.4 0.12 11722 .6 1050 44369.9 46588384. I 46.6 0.1 15 .0 743710 ,2
QI 2023 45062 .1 259 170560 .2 44175082 .0 44.2 0.10 11577.2 985 43819.8 43162518 .3 43.2 0,1 5.9 682889.4
02 2023 45516 .3 220 172279.0 37901381.4 37.9 0.08 I 0239.7 1040 38757.2 40307515 .7 40.3 0 .1 11.4 641312.6
Q3 2023 43550.1 282 164837 .2 46484080.9 46.5 0 .10 10780.6 1050 40804.6 42844879.0 42.8 0.1 7.2 679330.4
Q4 2023 38061.9 402 144064 .2 57913799 .5 57 ,9 0.13 10952 .1 1580 41453 .7 65496843 .6 65.5 0.1 10.6 652000.6
QI 2024 39466.3 187 149379.8 27934014.4 27 .9 0.06 11795.1 913 44644.3 40760247 ,8 40.8 0.1 5.8 658144.6
Q2 2024 38059 .9 393 144056.7 56614291.5 56.6 0.12 11405.6 1660 43170.2 71662525.4 71.7 0.2 11.1 626753.6
Q3 2024 39921.5 232 151 !03 .0 35055902.7 35.1 0.08 12503 .6 1200 47326.3 56791532.9 56.8 0.1 7.6 685626.1
Totals 1417108.4 3.8 500360.8 5.2 1428.4 57493129.7
Table G-2
Chloroform Mass Removal Per Well Per Quarter
MW-4 MW-26 TW4-19 TW4-20 TW4-4 TW4-22 TW4-24 TW4-25 TW4-01 TW4-02 TW4-11 TW4-21 TW4-37 TW4-39 TW4-40 TW4-41 Quarter
Quarter• (lbs.) (lbs.) Obs.) Obs.)** (lbs.) Ohs.) (lbs.) (lbs.) Obs.) (lbs.) Obs.) Obs.) Obs.) (lbs.) (lbs.) (lbs.) Totals (lbs.)
01 2007 36 8 12 .9 150 .2 87 .0 NA NA NA NA NA NA NA NA NA NA NA NA 286.9
02 2007 1.4 0,1 0 ,0 25 NA NA NA NA NA NA NA NA NA NA NA NA 40
Q3 2007 2.2 0.8 2.9 3.1 NA NA NA NA NA NA NA NA NA NA NA NA 9.0
Q4 2007 1.7 I 0 3.1 4.8 NA NA NA NA NA NA NA NA NA NA NA NA 10 ,6
QI 2008 1.7 0.4 4 ,6 7.2 NA NA NA NA NA NA NA NA NA NA NA NA 13 .8
02 2008 1.3 0.5 3.2 9.9 NA NA NA NA NA NA NA NA NA NA NA NA 14 .8
Q3 2008 1.2 0.3 15 .9 9.3 NA NA NA NA NA NA NA NA NA NA NA NA 26 .8
04 2008 1 3 0.3 20 .7 0.4 NA NA NA NA NA NA NA NA NA NA NA NA 22 .7
QI 2009 1.7 0.4 4.3 3.6 NA NA NA NA NA NA NA NA NA NA NA NA 10 .0
Q2 2009 6.8 0.2 3.7 2.8 NA NA NA NA NA NA NA NA NA NA NA NA 13 .5
03 2009 1.5 0.4 11.1 5_5 NA NA NA NA NA NA NA NA NA NA NA NA 18.5
04 2009 4.8 0.6 17 .8 26 .1 NA NA NA NA NA NA NA NA NA NA NA NA 49.4
QI 2010 0.9 0.4 2,7 0.4 NA NA NA NA NA NA NA NA NA NA NA NA 4.5
Q2 2010 1 5 1.0 6.8 5_9 1.4 NA NA NA NA NA NA NA NA NA NA NA 16 .5
Q3 2010 1.3 1.2 2.0 4.9 1.3 NA NA NA NA NA NA NA NA NA NA NA 10 .6
Q4 2010 1.1 05 7.7 7A 1.2 NA NA NA NA NA NA NA NA NA NA NA 17 .9
Ql 2011 11 02 12 9 96 1.1 NA NA NA NA NA NA NA NA NA NA NA 24 .9
Q22011 1.2 0.8 5.3 4.6 I.I NA NA NA NA NA NA NA NA NA NA NA 13.1
03 2011 1.2 0.4 u 4.1 1.2 NA NA NA NA NA NA NA NA NA NA NA 8.1
Q42011 1.2 0.8 2.7 4.8 1.4 NA NA NA NA NA NA NA NA NA NA NA 10 .8
QI 2012 1.1 0.6 0 ,8 7.0 1.0 NA NA NA NA NA NA NA NA NA NA NA 10.6
Q2 2012 1.1 0.7 0 ,7 6 .9 1.1 NA NA NA NA NA NA NA NA NA NA NA 10.4
032012 1.1 0.7 1.4 2.4 1.1 NA NA NA NA NA NA NA NA NA NA NA 6.6
Q4 2012 0 .9 0.3 2 ,0 3 .2 0,8 NA NA NA NA NA NA NA NA NA NA NA 7.2
QI 2013 0 .9 0.4 7.4 2.8 0.7 1.5 0.0 0.0 NA NA NA NA NA NA NA NA 13 .7
022013 0 .9 0.9 3.9 4.4 0.7 2.7 0.0 0.0 NA NA NA NA NA NA NA NA 13 ,5
Q3 2013 0.9 0.6 22.3 4.4 0.7 2.1 0.1 0,0 NA NA NA NA NA NA NA NA 31.1
Q4 2013 0.8 0.3 3,2 2,5 0.7 2.8 0 .1 0.0 NA NA NA NA NA NA NA NA 10 .3
Q12014 0.8 0.3 1.5 2.8 0.6 2.5 0 ,2 0 .0 NA NA NA NA NA NA NA NA 8.6
Q2 2014 0.8 0.4 2 ,0 3.4 0,6 2,5 0 ,1 0.0 NA NA NA NA NA NA NA NA 9,9
03 2014 0.9 0.4 3,6 1.8 0.8 2.5 0 .1 0.0 NA NA NA NA NA NA NA NA 10 .2
04 2014 0.8 0.4 7.1 3,2 0.6 2.5 0.04 0.0 NA NA NA NA NA NA NA NA 14 .6
01 2015 0.9 0.4 2.4 2,6 0.4 2.3 0.04 0 .0 0 23 0 37 0 20 NA NA NA NA NA 9.9
Q2 2015 07 0 .5 1.0 u 0.7 1.6 0.00 0.0 0.25 0.30 0.12 0.09 7.4 NA NA NA 15 3
Q3 2015 I 0 0.4 7 .6 2.5 0.7 l.6 0.03 0 .0 0.21 0.24 0.03 0,29 18 .8 NA NA NA 33.4
Q42015 1.0 0.4 7,4 2,2 0.6 1.5 0.02 0.0 0.18 0 .38 0 .09 0.38 18 .2 NA NA NA 32 ,3
01 2016 0.9 0.4 7.6 2.6 0.6 1.2 0.02 0 ,0 0,16 0.34 0 ,08 D.41 16 3 NA NA NA 30,6
Q2 2016 1.3 0.4 13 .0 4.4 0.9 1.9 0.04 0 ,0 0.19 0.36 0.10 0.60 16 .1 NA NA NA 39.4
Q3 2016 1.0 0 .5 5 .2 2.4 0.6 1.1 0.01 0 .0 0.15 0 ,26 0 ,08 0.42 13 ,1 NA NA NA 24 .7
Q4 2016 1.0 0.4 5,8 2.3 04 0.7 0 ,017 0 ,0 0 19 0 .26 0 .08 0.47 14 .0 0.1 NA NA 25 .6
01 2017 0,9 0.3 1,1 2.6 0.3 1.1 0 .015 0.0 0 .07 0 .26 0 .08 0.27 14 .6 5.6 NA NA 27.2
0220\7 0.9 0.5 0 .5 1.9 0.3 0.7 0 ,008 0.0 0 ,15 0.30 0 ,08 0 ,11 12 ,3 1.9 NA NA 19.6
Q3 2017 1.1 0,3 8.3 3.4 03 11 0 008 0.0 0 .14 0.21 0 .08 0.54 10 ,2 2.9 NA NA 28 .5
04 2017 1.2 0.6 0 .1 1.4 0.2 0.9 0.014 0.0 0.D7 0 .23 0 .06 0.49 11.3 0.3 NA NA 16.9
01 2018 1.2 0.3 2.4 1.8 0 ,2 0 ,9 0,020 0.0 0.01 0 ,10 0 .07 0.41 9.1 1.4 NA NA 18.0
Q2 2018 1.1 0.4 2,8 I 3 0.2 0.6 0.022 0.0 0.09 0.13 0.06 0 .52 10.1 2.0 NA 0 ,9 20.1
Q3 2018 1.0 0.4 1.7 1.1 0 .1 0.6 0.016 0.0 0.08 0 .12 0.06 0.44 9.1 2.3 NA 0 .5 17 .6
04 2018 1.1 0.3 4 .7 1.0 0.1 0.5 0.Dl8 0.0 0.06 0.11 0.06 0 .59 9.7 2.0 NA 0.4 20 ,8
QI 2019 1.1 0.2 2,0 1.9 0 .1 0.9 0.023 0,0 0,01 0.14 0.06 0.33 8.6 0.4 NA 0.3 16.2
02 2019 1.0 0,3 9 .7 1.5 0 .1 0 .9 0.013 0 .0 0.08 0.16 0,05 0 ,65 8,8 2 5 0 18 0.3 26 .1
Q3 2019 0.9 0 .3 5.6 u 0.1 0.7 0 014 0.0 0.07 0.09 0.05 0.5 6.7 1.3 0.37 0.2 18.3
Q4 2019 1.1 0,3 0.5 0 ,6 0.1 0 .8 0,037 0.0 0,08 0,11 0,05 08 7.3 0.7 0.28 0 ,2 13 .0
QI 2020 1.1 0 ,2 7.0 1.1 0 I 08 0.044 0,0 0.09 0.21 0.05 08 6.6 03 0 31 0 ,2 18 .9
Table G-2
Chloroform Mass Removal Per Well Per Quarter
MW-4 MW-26 TW4-19 TW4-20 TW4-4 TW4-22 TW4-24 TW4-2S TW4-0l TW4-02 TW4-ll TW4-21 TW4-37 TW4-39 TW4-40 TW4-41 Quarter
Quartec• (lbs.) (lbs.) (lbs.) (lbs.)•• (lbs.) (lbs.) (lbs,) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) (lbs.) Totals (lbs.)
Q2 2020 11 0.3 8.7 4.9 0.1 0.5 0.024 0.0 0.04 0,13 0,05 0.7 6.4 1.8 0 31 0-2 25 .2
Q3 2020 0.9 0.2 1.7 0,0 0.1 0,7 0 028 0,0 0.08 0,15 0.05 0.8 6.5 1.8 0,24 0 I 13.4
04 2020 0,8 0,2 0,8 0.0 0.1 0.7 0.063 0.0 0 07 0,14 O.D3 0,8 5.3 0.3 0.17 0.2 9 .6
QI 2021 0.9 0,7 7.4 0.0 0.1 1.0 0.066 0.0 0.07 0 .10 0 .05 0.3 4.7 1.0 0 ,26 0.1 16.8
02 2021 1.0 0,2 1.0 0,0 0.1 0.9 0.019 0.0 0.07 0 .12 0 ,05 0.9 6.4 0.7 0 ,19 0.1 11 8
Q3 2021 0.9 0.4 5.9 0 .0 0.1 07 0,046 0,0 0 ,06 0 .12 0.03 0.5 4.3 0.2 0 .15 0.1 13.4
04 2021 0.9 0.2 7.2 0 .0 0.1 0,6 0.090 0.0 0.07 0 ,09 0 ,04 0,6 5.8 0 3 0.14 0.1 16 .1
QI 2022 0,8 0,3 0.6 0.0 0.l 0.6 0.070 0.0 0 07 0 .10 0.D3 0.4 4,9 0.2 0.11 0.1 8.4
02 2022 0.8 0.1 2.6 0,0 0.1 0,5 0.052 0.0 0.06 0 .09 0 .03 0.5 16.4 0.3 0.14 0.1 21 8
Q3 2022 0.8 0.1 5.4 0 .0 0.1 0,6 0.043 0.0 0.07 0 ,08 0 .03 0.8 3.8 0.2 0 11 0.1 12 .3
04 2022 0,9 0,3 8.5 0.0 0.1 0.4 0.067 0 .0 0.07 0 .10 O,Q3 0.4 3.5 0,6 012 0.1 15 0
QI 2023 08 0.1 0.3 0.0 0,1 0 ,3 0 060 0,0 0,06 0,07 0 .03 0.4 3.0 0.6 0.10 0.1 5.9
Q2 2023 0.8 0.5 47 0.0 0.1 0.6 0,025 0.0 0.05 0 .08 0 .02 0.5 2.9 0.8 0 08 0.1 11 .4
03 2023 0.8 0.6 02 0.0 0.1 0.4 0.031 0.0 0.06 0 ,08 0 .03 0,0 3,7 1.0 0.10 0,1 7.2
04 2023 1.2 0 .2 1 5 o.o 0.1 0.6 0121 0,0 0,08 0 ,10 0 .04 1.1 5.0 0,3 0.13 0.1 10 .6
QI 2024 0.7 0 .1 0.3 0.0 0.1 0.4 0.055 0 .0 0.05 0 ,08 0 .03 0.4 3.3 0.2 0.06 0.1 5.8
Q2 2024 1.3 0 .8 0.9 0.0 0.1 0.7 0.029 0.0 0,09 0 .13 0 ,04 0.81 4.9 1.1 0.12 0.2 II.I
03 2024 1 0 0 I 0.7 0.0 0 I 04 0 038 00 0 07 0 10 0.03 0.62 4 I 02 0 08 0 I 7 6
Well Totals 120 .6 42 .1 489 .2 296 .2 27 .2 52 .0 2.0 0.0 3 .7 6.5 2.2 19.6 322 .9 35 .2 3.8 5.2 1428.4
• QI 2007 represents the cumulative total prior to and including QI 2007 .
•• TW4-20 collapsed in August 2020 and was abandoned on October I , 2020
Table G-3 Well Pumping Rates and Volumes
Volume of Water Pumped
Pumping Well Name During the Quarter (gals) Average Pump Rate (gpm)
MW-4 98776.6 4.0
MW-26 24410.1 15.1
TW4-19 113619.9 15.5
TW4-4 5884.5 15.9
TWN-2 16719.8 15.8
TW4-22 24076.0 16.0
TW4-24 59179.9 15.8
TW4-25 119012.7 14.8
TW4-0l 7941.6 12.5
TW4-02 11429.8 16.0
TW4-ll 1044.7 15.6
TW4-21 85978.1 16.0
TW4-37 47533.7 17.8
TW4-39 34313.4 18.0
TW4-40 39921.5 18.0
TW4-41 12503.6 6.0
Q1 2007
Q2 2007
Q3 2007
Q4 2007
Q 1 2008
Q2 2008
Q3 2008
Q4 2008
Q1 2009
Q2 2009
Q3 2009
Q4 2009
Q 1 2010
02 2010
03 2010
04 2010
01 2011
02 2011
03 2011
04 2011
01 2012
02 2012
03 2012
04 2012
01 2013
02 2013
Q3 2013
04 2013
01 2014
Q2 2014
Q3 2014
04 2014
01 2015
02 2015
03 2015
Q4 2015
Q1 2016
Q2 2016
Q3 2016
Q4 2016
01 2017
Q2 2017
Q3 2017
Q4 2017
Q1 2018
Q2 2018
Q3 2018
04 2018
Q1 2019
Q2 2019
03 2019
Q4 2019
01 2020
02 2020
03 2020
Q4 2020
Q1 2021
Q2 2021
Q3 2021
04 2021
Q1 2022
02 2022
Q3 2022
Q4 2022
01 2023
02 2023
03 2023
04 2023
01 2024
Q2 2024
03 2024
Chloroform Removed (Pounds)
--~t -. •
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◄
◄
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-• • I •
I •
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-' . '
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•
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• ' ►
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◄ ►
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' -►
-I ◄ -►
0
0
(]l
0
I
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0
0
' ....
(]l
0
N
0
0
'
N
(]l
0
.
(,J
0
0
(,J
(]l
0
-
~
0
0
s:
~
0
.i::,.
s: w en en
0 -(")
:T o a
o' -,
3
:::0
CD
3
0
c§
a.
C'"
'<
0
C w
~
CD -, -C'" en -
0
Chloroform Removed (Pounds) p p p
0 0 _. _.
0 01 0 01
+-Q1 2015
Q2 2015
Q3 2015
Q4 2015
Q1 2016
Q2 2016
Q3 2016
Q4 2016
Q1 2017
Q2 2017
Q3 2017
Q4 2017
Q1 2018
Q2 2018
Q3 2018
Q4 2018
Q1 2019
Q2 2019
Q3 2019
Q4 2019
Q1 2020
Q2 2020
Q3 2020
Q4 2020
Q1 2021
Q2 2021
Q3 2021
Q4 2021
Q1 2022
Q2 2022
Q3 2022
Q4 2022
Q1 2023
Q2 2023
Q3 2023
Q4 2023
Q1 2024
Q2 2024
Q3 2024
0
r-)
0
0
N
01
0
w
0
--l
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TabH
Laboratory Analytical Reports
Analyte
QC Sample ID: BYHI 129-BLKI
Date Prepared: 08/22/2024
Chloride
QC Sample ID: BYH1252-BLK1
Date Prepared: 08/26/2024
Chloride
QC Sample ID: BYHl311-BLKI
Date Prepared: 08 /27/2024
Chloride
QC Sample ID: BYH1129-BS1
Date Prepared: 08/22/2024
Chloride
QC Sample ID: BYHl252-BS I
Date Prepared: 08/26/2024
Chloride
QC Sample ID: BYH131 l-BS1
Date Prepared: 08/27/2024
Chloride
QC Sample ID: BYHI 129-MS2
Date Prepared: 08/22/2024
Chloride
QC Sample ID: BYH1252-MS1
Date Prepared: 08/26/2024
Chloride
QC Sample ID: BYHl252-MS2
Date Prepared: 08/26/2024
Chloride
QC Sample ID: BYH1129-MSD2
Date Prepared: 08/22/2024
Chloride
QC Sample ID : BYHl252-MSDI
Date Prepared: 08/26/2024
Chloride
QC Sample ID: BYH1252-MSD2
Date Prepared: 08/26/2024
Chloride
CtF WO#: 24H2049
www.ChemtechFord.com
QC Report for Work Order (WO) -24H2049
%Rec RPD Limits RPD Max Result Source Cone
Blank -EPA 300.0
Batch: BYHI 129
Date Analyzed: 08/22/2024 Units: mg/L
ND
Batch: BYH1252
Date Analyzed: 08/26/2024 Units: mg/L
ND
Batch: BYH13 l l
Date Analyzed: 08/27/2024 Units : mg/L
ND
LCS -EPA 300.0
Batch: BYHl 129
Date Analyzed: 08/22/2024 Units: mg/L
101 90 -110 203
Batch: BYHl252
Date Analyzed: 08/26/2024 Units : mg/L
103 90-110 206
Batch: BYH13 ll
Date Analyzed: 08/27/2024 Units : mg/L
103 90 -110 206
Matrix Spike -EPA 300.0
Batch: BYHI 129 QC Source Sample: 24H2049-0 I
Date Analyzed: 08/23/2024 Units: mg/L
104 80-120 113 90 .0
Batch: BYH1252 QC Source Sample: 24H2049-02
Date Analyzed: 08/26/2024 Units: mg/L
99.0 80-120 598 400
Batch: BYHl252 QC Source Sample: 24H2049-03
Date Analyzed: 08/26/2024 Units: mg/L
97.9 80-120 230 34.6
Matrix Spike Dup -EPA 300.0
Batch: BYHl 129 QC Source Sample: 24H2049-01
Date Analyzed: 08/23/2024 Units: mg/L
105 0.188 BO -120 20 113 90.0
Batch : BYH1252 QC Source Sample: 24H2049-02
Date Analyzed: 08/26/2024 Units: mg/L
92.5 2.19 80 -120 20 585 400
Batch: BYH1252 QC Source Sample: 24H2049-03
Date Analyzed: 08/26/2024 Units: mg/L
98.1 0.119 80-120 20 231 34.6
Spk Value MRL DF
1.00 1.00
1.00 1.00
1.00 1.00
200 1.00 1 .00
200 1 .00 1.00
200 1.00 1.00
22.2 1.11 1.00
200 11.0 1.00
200 11 .0 1.00
22.2 1.11 1.00
200 11 .0 1 .00
200 11.0 1.00
Page 22 of 29
Analyte
QC Sample ID: BYH1393-BLK1
Date Prepared: 08/28/2024
Nitrate + Nitrite, Total, as N
QC Sample ID: BYH1394-BLK1
Date Prepared: 08/28/2024
Nitrate+ Nitrite, Total, as N
QC Sample ID: BYHI 393-BS 1
Date Prepared: 08/28/2024
Nitrate+ Nitrite, Total, as N
QC Sample ID: BYH1394-BS1
Date Prepared: 08/28/2024
Nitrate + Nitrite, Total, as N
QC Sample ID: BYH1394-MS 1
Date Prepared: 08/28/2024
Nitrate + Nitrite, Total, as N
QC Sample ID: BYH1394-MSD1
Date Prepared: 08/28/2024
Nitrate+ Nitrite, Total, as N
CtF WO#: 24H2049
www.ChemtechFord.com
QC Report for Work Order (WO) -24H2049
%Rec RPD Limits RPD Max Result Source Cone
Blank -EPA 353.2
Batch: BYH1393
Date Analyzed: 08/28/2024 Units: mg/L
ND
Batch: BYH1394
Date Analyzed: 08/28/2024 Units: mg/L
ND
LCS -EPA 353.2
Batch: BYH1393
Date Analyzed: 08/28/2024 Units: mg/L
97.5 90-110 1.95
Batch: BYH1394
Date Analyzed: 08/28/2024 Units: mg/L
97.0 90-110 1.94
Matrix Spike -EPA 353.2
Batch: BYH1394 QC Source Sample: 24H2049-0 I
Date Analyzed: 08/28/2024 Units: mg/L
104 90 -110 2.59 1.55
Matrix Spike Dup -EPA 353.2
Batch: BYH1394 QC Source Sample: 24H2049-0l
Date Analyzed: 08/28/2024 Units: mg/L
109 1.91 90 -110 20 2 .64 1.55
Spk Value MRL DF
0 .100 1.00
0.100 1.00
2.00 0.100 1.00
2.00 0 .100 1.00
1.00 0.100 1.00
1.00 0.100 1.00
Page 23 of 29
QC Report for Work Order {WO) -24H2049
Analyte %Rec RPD Limits RPD Max Result Source Cone Spk Value MRL DF
Blank -EPA 8260D
QC Sample ID: BYH1220-BLK1 Batch: BYH 1220
Date Prepared: 08/23/2024 Date Analyzed: 08 /2 3/2 024 Units: ug/L
Carbon Tetrachloride ND 1.0 1.00
Chloroform ND 1.0 1.00
Chloromethane ND 1.0 1.00
Methylene Chloride ND 1.0 1.00
QC Sample ID: BYHl220-BLK2 Batch: BYHI 220
Date Prepared: 08 /2 3/2024 Date Analyzed: 08/23 /2024 Units : ug/L
Carbon Tetrachloride ND 250 1.00
Chloroform ND 250 1.00
Chloromethane ND 250 1.00
Methylene Chloride ND 250 1.00
QC Sample ID: BYHl324-BLK1 Batch: BYHl324
Date Prepared: 08/27/2024 Date Analyzed: 08/27/2024 Units: ug/L
Carbon Tetrachloride ND 1 .0 1.00
Chloroform ND 1.0 1.00
Chloromethane ND 1.0 1.00
Methylene Chloride ND 1.0 1.00
QC Sample ID : BYH1324-BLK2 Batch: BYHl324
Date Prepared: 08 /27/2024 Date Analyzed: 08 /27 /2024 Units: ug/L
Carbon Tetrachloride ND 250 1.00
Chloroform ND 250 1.00
Ch loromethane ND 250 1.00
Methylene Chloride ND 250 1.00
QC Sample ID: BYHl398-BLK1 Batch: BYHI 398
Date Prepared: 08 /28 /2024 Date Analyzed: 08 /28 /2024 Units : ug/L
Carbon Tetrachloride ND 1.0 1.00
Chloroform ND 1.0 1.00
Chloromethane ND 1.0 1.00
Methylene Chloride ND 1.0 1.00
QC Sample ID: BYHl485-BLKI Batch: BYHI 485
Date Prepared: 08/29/2024 Date Analyzed: 08/29/2024 Units: ug/L
Carbon Tetrachloride ND 1.0 1.00
Chloroform ND 1.0 1.00
Chloromethane ND 1.0 1.00
Methylene Chloride ND 1.0 1.00
LCS -EPA 8260D
QC Sample ID: BYHl220-BS 1 Batch : BYH1220
Date Prepared: 08/23 /2024 Date Analyzed: 08 /2 3/2 024 Units : ug/L
Carbon Tetrachloride 140 70-130 14.0 10.0 1.0 1.00
HB -Recovery for this parameter exceeded the upper acceptance limit. Associated sample(s) were all non-detect and
therefore accepted and reported for this parameter.
Chloroform 110 70 -130 11 .0 10.0 1.0 1.00
Chloromethane 107 70 -130 10 .7 10.0 1.0 1.00
Methylene Chloride 110 70 -130 11.0 10.0 1.0 1.00
QC Sample ID : BYHl324-BS1 Batch: BYHl324
Date Prepared : 08/27/2024 Date Analyzed: 08/2 7/2024 Units : ug/L
Carbon Tetrachloride 98.0 70-130 9.80 10.0 1.0 1.00
Chloroform 90.8 70 -130 9.08 10.0 1.0 1.00
CtF WO#: 24H2049
www.ChemtechFord.com Page 24 of 29
QC Report for Work Order (WO) -24H2049
Analyte % Rec RPO Limits RPO Max Result Source Cone Spk Value MRL OF
LCS -EPA 8260D (cont.)
QC Sample ID: BYH1324-BSI Batch: BYH1324
Date Prepared: 08/27/2024 Date Analyzed: 08/27/2024 Units: ug/L
Chloromethane 126 70 -130 12 .6 10.0 1.0 1.00
Methylene Chloride 84.4 70 -130 8.44 10.0 1.0 1.00
QC Sample ID: BYH1398-BSI Batch: BYH1398
Date Prepared: 08/28/2024 Date Analyzed: 08/28/2024 Units: ug/L
Carbon Tetrachloride 116 70 -130 11 .6 10.0 1.0 1.00
Chloroform 102 70 -130 10.2 10 .0 1.0 1.00
Chloromethane 101 70 -130 10.1 10.0 1.0 1.00
Methylene Chloride 101 70 -130 10.1 10.0 1.0 1.00
QC Sample ID: BYH1485-BSI Batch: BYH1485
Date Prepared: 08/29/2024 Date Analyzed: 08/29/2024 Units: ug/L
Carbon Tetrachloride 96.4 70-130 9.64 10.0 1.0 1.00
Chloroform 92 .8 70-130 9 .28 10.0 1.0 1.00
Chloromethane 126 70-130 12.6 10.0 1.0 1.00
Methylene Chloride 92.3 70 -130 9.23 10.0 1.0 1.00
Matrix Spike -EPA 8260D
QC Sample ID: BYH1220-MSI Batch: BYHI 220 QC Source Sample: 24H2049-0 I
Date Prepared: 08/23/2024 Date Analyzed: 08/23/2024 Units: ug/L
Carbon Tetrachloride 106 70 -130 53.1 ND 50.0 5 .0 1.00
Chloroform 92.0 70 -130 46 .0 ND 50.0 5.0 1.00
Chloromethane 87.3 70 -130 43 .6 ND 50.0 5.0 1.00
Methylene Chloride 90.6 70 -130 45.3 ND 50.0 5.0 1.00
QC Sample ID: BYHI 398-MS 1 Batch: BYH1398 QC Source Sample: 24H2049-l l
Date Prepared: 08/28/2024 Date Analyzed: 08/28/2024 Units: ug/L
Carbon Tetrachloride 86.0 70-130 43.0 ND 50.0 5.0 1.00
Chloroform -1500 70-130 1380 2140 50 .0 5.0 1.00
QM-4X -The spike recovery was outside of QC acceptance limits for the MS and/or MSD due to analyte concentration
at 4 times or greater the spike concentration. The QC batch was accepted based on LCS and/or LCSD recoveries
within the acceptance limits.
Chloromethane 69 .8 70-130 34.9 ND 50 .0 5 .0 1.00
QM-RPO -The recovery was outside acceptance limits for the MS and/or MSD , The RPO between the MS and MSD
was acceptable and indicates the recovery is due to matrix interference. The batch was accepted based on the
acceptable recovery of the LCS and the RPO .
Methylene Chloride 81 .2 70 -130 40 .6 ND 50.0 5.0 1.00
Matrix Spike Dup -EPA 8260D
QC Sample ID: BYHl220-MSD1 Batch: BYHl220 QC Source Sample: 24H2049-0 I
Date Prepared: 08/23/2024 Date Analyzed: 08/23/2024 Units: ug/L
Carbon Tetrachloride 108 1.68 70 -130 20 54 .0 ND 50.0 5.0 1.00
Chloroform 93.2 1.30 70 -130 20 46.6 ND 50 .0 5.0 1.00
Chloromethane 91.1 4.26 70 -130 20 45 .6 ND 50.0 5 ,0 1.00
Methylene Chloride 93.0 2.61 70 -130 20 46.5 ND 50 .0 5 ,0 1.00
QC Sample ID: BYHl398-MSD1 Batch: BYH1398 QC Source Sample: 24H2049-l l
Date Prepared: 08/28/2024 Date Analyzed: 08/28/2024 Units: ug/L
Carbon Tetrachloride 83.1 3.43 70 -130 20 41.6 ND 50 .0 5 .0 1.00
Chloroform -1290 7.38 70 -130 20 1490 2140 50.0 5 .0 1.00
QM-4X -The spike recovery was outside of QC acceptance limits for the MS and/or MSD due to analyte concentration
at 4 times or greater the spike concentration. The QC batch was accepted based on LCS and/or LCSD recoveries
within the acceptance limits.
Chloromethane 73.2 4.76 70-130 20 36 .6 ND 50.0 5.0 1.00
Methylene Chloride 82.0 0.980 70 -130 20 41 .0 ND 50.0 5.0 1.00
CtF WO#: 24H2049
www.ChemtechFord.com Page 25 of 29
Surrogates Report for Work Order (WO) -24H2049
QCID Analyte %Rec LCL UCL Result Spk Value Batch DF
Blank -EPA 8260D
BYH1220-BLK1 1,2-Dichloroethane-d4 93.5 64.2 126 9.35 10.0 BYH1220 1.00
BYH1220-BLK2 1,2-Dichloroethane-d4 95.6 64.2 126 2390 2500 BYH1220 1.00
BYH1220-BLK1 4-Bromofluorobenzene 92.8 71.4 125 9.28 10.0 BYH1220 1.00
BYH1220-BLK2 4-Bromofluorobenzene 92.7 71.4 125 2320 2500 BYH1220 1.00
BYH1220-BLK1 Toluene-d8 99.2 63.2 129 9.92 10.0 BYH1220 1.00
BYH 1220-BLK2 Toluene-dB 100 63.2 129 2500 2500 BYH1220 1.00
BYH1324-BLK1 1,2-Dichloroethane-d4 99.1 64.2 126 9.91 10.0 BYH1324 1.00
BYH 1324-BLK2 1,2-Dichloroethane-d4 99.5 64.2 126 2490 2500 BYH1324 1.00
BYH 1324-BLK2 4-Bromofluorobenzene 94.3 71.4 125 2360 2500 BYH1324 1.00
BYH 1324-BLK 1 4-Bromofluorobenzene 95.1 71.4 125 9.51 10.0 BYH1324 1.00
BYH1324-BLK1 Toluene-d8 94.8 63.2 129 9.48 10.0 BYH1324 1.00
BYH 1324-BLK2 Toluene-d8 95.5 63.2 129 2390 2500 BYH1324 1.00
BYH1398-BLK1 1,2-Dichloroethane-d4 91.6 64.2 126 9.16 10.0 BYH1398 1.00
BYH1398-BLK1 4-Bromofluorobenzene 96.8 71.4 125 9.68 10.0 BYH1398 1.00
BYH1398-BLK1 Toluene-d8 100 63.2 129 10.0 10.0 BYH1398 1.00
BYH 1485-BLK 1 1,2-Dichloroethane-d4 101 64.2 126 10.1 10.0 BYH1485 1.00
BYH1485-BLK1 4-Bromofluorobenzene 97.7 71.4 125 9.77 10.0 BYH1485 1.00
BYH1485-BLK1 Toluene-d8 95.2 63.2 129 9.52 10.0 BYH1485 1.00
LCS -EPA 8260D
BYH1220-8S1 1,2-Dichloroethane-d4 92.9 64.2 126 9.29 10.0 BYH1220 1.00
BYH1220-BS1 4-Bromofluorobenzene 94.2 71.4 125 9.42 10.0 BYH1220 1.00
BYH1220-8S1 Toluene-d8 101 63.2 129 10.1 10.0 BYH1220 1.00
BYH1324-8S1 1,2-Dichloroethane-d4 93.2 64.2 126 9.32 10.0 BYH1324 1.00
BYH1324-8S1 4-Bromofluorobenzene 101 71.4 125 10.1 10.0 BYH1324 1.00
BYH 1324-BS 1 Toluene-dB 89.9 63.2 129 8.99 10.0 BYH1324 1.00
BYH1398-8S1 1,2-Dichloroethane-d4 . 91.9 64.2 126 9.19 10.0 BYH1398 1.00
BYH1398-8S1 4-Bromofluorobenzene 101 71.4 125 10.1 10.0 BYH1398 1.00
BYH1398-8S1 Toluene-d8 101 63.2 129 10.1 10.0 BYH1398 1.00
BYH 1485-BS 1 1,2-Dichloroethane-d4 96.7 64.2 126 9.67 10.0 BYH1485 1.00
BYH1485-BS1 4-Bromofluorobenzene 96.9 71.4 125 9.69 10.0 BYH1485 1.00
BYH 1485-BS 1 Toluene-dB 91.5 63.2 129 9.15 10.0 BYH1485 1.00
Matrix Spike -EPA 8260D
BYH 1220-MS 1 1,2-Dichloroethane-d4 92.4 64.2 126 46.2 50.0 BYH1220 1.00
BYH 1220-MS 1 4-Bromofluorobenzene 94.8 71.4 125 47.4 50.0 BYH1220 1.00
BYH 1220-MS 1 Toluene-d8 100 63.2 129 50.2 50.0 BYH1220 1.00
BYH1324-MS1 1,2-Dichloroethane-d4 96.9 64.2 126 48.4 50.0 BYH1324 1.00
BYH1324-MS1 4-Bromofluorobenzene 95.8 71.4 125 47.9 50.0 BYH1324 1.00
BYH1324-MS1 Toluene-d8 91.9 63.2 129 46.0 50.0 BYH1324 1.00
BYH1398-MS1 1,2-Dichloroethane-d4 92.1 64.2 126 46.0 50.0 BYH1398 1.00
BYH 1398-MS 1 4-Bromofluorobenzene 99.2 71.4 125 49.6 50.0 BYH1398 1.00
BYH1398-MS1 Toluene-d8 101 63.2 129 50.4 50.0 BYH1398 1.00
BYH1485-MS1 1,2-Dichloroethane-d4 99.6 64.2 126 49.8 50.0 BYH1485 1.00
BYH1485-MS1 4-Bromofluorobenzene 98.1 71.4 125 49.0 50.0 BYH1485 1.00
BYH 1485-MS 1 Toluene-d8 91.3 63.2 129 45.6 50.0 BYH1485 1.00
Matrix Spike Dup -EPA 8260D
CtF WO#: 24H2049
www.ChemtechFord.com Page 26 of 29
BYH1220-MSD1 1,2-Dichloroethane-d4
BYH1220-MSD1 4-Bromofluorobenzene
BYH1220-MSD1 Toluene-dB
BYH1324-MSD1 1,2-Dichloroethane-d4
BYH 1324-MSD 1 4-Bromofluorobenzene
BYH1324-MSD1 Toluene-dB
BYH1398-MSD1 1,2-Dichloroethane-d4
BYH 1398-MSD 1 4-Bromofluorobenzene
BYH1398-MSD1 Toluene-dB
BYH1485-MSD1 1,2-Dichloroethane-d4
BYH1485-MSD1 4-Bromofluorobenzene
BYH1485-MSD1 Toluene-dB
CtF WO#: 24H2049
www.ChemtechFord.com
Matrix Spike Dup -EPA 8260D (cont.)
93.1 64.2 126 46.6 50.0 BYH1220 1.00
94.0 71.4 125 47.0 50.0 BYH1220 1.00
100 63.2 129 50.0 50.0 BYH1220 1.00
95.9 64.2 126 48.0 50.0 BYH1324 1.00
94.3 71.4 125 47.2 50.0 BYH1324 1.00
91.8 63.2 129 45.9 50.0 BYH1324 1.00
92.0 64.2 126 46.0 50.0 BYH1398 1.00
100 71.4 125 50.1 50.0 BYH1398 1.00
101 63.2 129 50.4 50.0 BYH1398 1.00
98.1 64.2 126 49.0 50.0 BYH1485 1.00
94.0-71.4 125 47.0 50.0 BYH1485 1.00
91.1 63.2 129 45.6 50.0 BYH1485 1.00
Page 27 of 29
Surrogate Recoveries {Field Samples)
LabNumber Analyte Result SpkLvl %Rec LCL UCL Qualifier
8260 Low Level Volatiles
24H2049-01 1 ,2-Dichloroethane-d4 9.75 10.0 97.5 64.2 126
24H2049-01 4-Bromofluorobenzene 9.27 10 .0 92.7 71.4 125
24H2049-01 Toluene-dB 10.0 10 .0 100 63.2 129
8260 Low Level Volatiles
24H2049-02 1 ,2-Dichloroethane-d4 11 .0 10.0 110 64.2 126
24H2049-02 4-Bromofluorobenzene 10.2 10 .0 102 71.4 125
24H2049-02 Toluene-dB 9.48 10 .0 94.8 63 .2 129
8260 Low Level Volatiles
24H2049-03 Toluene-dB 9.58 10.0 95 .8 63.2 129
24H2049-03 4-Bromofluorobenzene 9.76 10 .0 97.6 71.4 125
24H2049-03 1,2-Dichloroethane-d4 10.5 10.0 105 64 .2 126
8260 Low Level Volatiles
24H2049-04 1,2-Dichloroethane-d4 10.3 10 .0 103 64 .2 126
24H2049-04 Toluene-dB 9 .61 10.0 96.1 63 .2 129
24H2049-04 4-Bromofluorobenzene 9.38 10.0 93 .8 71 .4 125
8260 Low Level Volatiles
24H2049-05 Toluene-dB 9.38 10 .0 93.8 63.2 129
24H2049-05 4-Bromofluorobenzene 9.80 10.0 98.0 71.4 125
24H2049-05 1,2-Dichloroethane-d4 10.6 10 .0 106 64.2 126
8260 Low Level Volatiles
24H2049-06 Toluene-dB 9 .88 10 .0 98 .8 63 .2 129
24H2049-06 1,2-Dichloroethane-d4 10 .7 10 .0 107 64 .2 126
24H2049-06 4-Bromofluorobenzene 9.67 10 .0 96.7 71.4 125
8260 Low Level Volatiles
24H2049-07 Toluene-dB 9.76 10.0 97.6 63.2 129
24H2049-07 4-Bromofluorobenzene 9.81 10.0 98.1 71.4 125
24H2049-07 1,2-Dichloroethane-d4 10.3 10 .0 103 64 .2 126
8260 Low Level Volatiles
24H2049-08 1,2-Dichloroethane-d4 10.2 10.0 102 64 .2 126
24H2049-08 4-Bromofluorobenzene 9.49 10.0 94.9 71.4 125
24H2049-08 Toluene-dB 9.65 10.0 96 .5 63 .2 129
8260 Low Level Volatiles
24H2049-09 Toluene-dB 9.63 10.0 96 .3 63.2 129
24H2049-09 4-Bromofluorobenzene 9.30 10.0 93.0 71.4 125
24H2049-09 1 ,2-Dichloroethane-d4 10.1 10 .0 101 64.2 126
8260 Low Level Volatiles
24H2049-10 1,2-Dichloroethane-d4 10 .2 10 .0 102 64 .2 126
24H2049-10 4-Bromofluorobenzene 9 .56 10.0 95.6 71.4 125
24H2049-10 Toluene-dB 9.53 10 .0 95.3 63.2 129
CtF WO#: 24H2049
www.ChemtechFord.com Page 28 of 29
8260 Low Level Volatiles
24H2049-11 4-Bromofluorobenzene
24H2049-11 1 ,2-Dichloroethane-d4
24H2049-11 Toluene-dB
8260 Low Level Volatiles
24H2049-12 Toluene-dB
24H2049-12 1,2-Dichloroethane-d4
24H2049-12 4-Bromofluorobenzene
8260 Low Level Volatiles
24H2049-13 1 ,2-Dichloroethane-d4
24H2049-13 4-Bromofluorobenzene
24H2049-13 Toluene-dB
8260 Low Level Volatiles
24H2049-14 1,2-Dichloroethane-d4
24H2049-14 Toluene-dB
24H2049-14 4-Bromofluorobenzene
8260 Low Level Volatiles
24H2049-15 1,2-Dichloroethane-d4
24H2049-15 4-Bromofluorobenzene
24H2049-15 Toluene-dB
8260 Low Level Volatiles
24H2049-16 4-Bromofluorobenzene
24H2049-16 1,2-Dichloroethane-d4
24H2049-16 Toluene-dB
8260 Low Level Volatiles
24H2049-17 Toluene-dB
24H2049-17 1,2-Dichloroethane-d4
24H2049-17 4-Bromofluorobenzene
CtF WO#: 24H2049
www.ChemtechFord.com
9 .69
9 .24
10 .0
10.2
9.48
9.81
9.48
9.87
10.0
9.48
10.0
9.81
9.79
9.81
10.0
9.66
9.33
9.35
10.0
9 .36
9 .92
10.0 96 .9 71.4 125
10 .0 92.4 64.2 126
10.0 100 63.2 129
10.0 102 63.2 129
10.0 94.8 64.2" 126
10.0 98.1 71.4 125
10 .0 94.8 64.2 126
10.0 98 .7 71 .4 125
10.0 100 63.2 129
10 .0 94 .8 64.2 126
10.0 100 63.2 129
10.0 98.1 71.4 125
10 .0 97 .9 64 .2 126
10 .0 98 .1 71.4 125
10 .0 100 63.2 129
10.0 96.6 71.4 125
10 .0 93.3 64.2 126
10 .0 93.5 63.2 129
10 .0 100 63 .2 129
10 .0 93.6 64 .2 126
10.0 99.2 71.4 125
Page 29 of 29
Analyte
QC Sample ID : BYI0644-BLKI
Date Prepared: 09/16/2024
Chloride
QC Sample ID: BYI0661-BLKI
Date Prepared: 09/16/2024
Chloride
QC Sample ID: BYI0644-BS I
Date Prepared: 09/16/2024
Chloride
QC Sample ID: BYI0661-BSI
Date Prepared: 09/16/2024
Chloride
QC Sample ID: BYI0644-MS I
Date Prepared: 09/16/2024
Chloride
QC Sample ID: BYI0644-MSDI
Date Prepared: 09/16/2024
Chloride
CtF WO#: 2411050
www.ChemtechFord.com
QC Report for Work Order (WO) -2411050
% Rec RPD Limits RPD Max Result Source Cone
Blank -EPA 300.0
Batch : BYI0644
Date Analyzed: 09 /16/2024 Units: mg/L
ND
Batch: BYI0661
Date Analyzed: 09/16/2024 Units: mg/L
ND
LCS -EPA 300.0
Batch: BYI0644
Date Analyzed : 09 /16/2 024 Units: mg/L
93.7 90-110 187
Batch: BYI0661
Date Analyzed: 09/16/2024 Units: mg/L
97.6 90 -110 195
Matrix Spike -EPA 300.0
Batch : BYI0644 QC Source Sample: 2411050-02
Date Analyzed : 09 /16/2024 Units : mg/L
98.9 80-120 47.8 25.8
Matrix Spike Dup -EPA 300.0
Batch: BYI0644 QC Source Sample: 2411050-02
Date Analyzed: 09/16/2024 Units: mg/L
87.9 5.25 80-120 20 45.3 25 .8
Spk Value MRL DF
1.00 1.00
1.00 1 .00
200 1 .00 1 .00
200 1.00 1.00
22.2 1.11 1.00
22.2 1.11 1.00
Page 17 of 22
QC Report for Work Order (WO) -2411050
Analyte % Rec RPO Limits RPO Max Result Source Cone
Blank -EPA 353.2
QC Sample ID: BYI0745-BLKI Batch: BYI0745
Date Prepared: 09/ l 7 /2024 Date Analyzed: 09/18/2024 Units:
Nitrate+ Nitrite, Total, as N ND
LCS -EPA 353.2
QC Sample ID: BYI0745-BS 1 Batch: BYI0745
Date Prepared: 09/17/2024 Date Analyzed: 09/18/2024 Units:
Nitrate+ Nitrite, Total, as N 102 90 -110 2.03
Matrix Spike -EPA 353.2
QC Sample ID: BYI0745-MS4 Batch: BYI0745 QC Source Sample: 2411050-02
Date Prepared: 09/17/2024 Date Analyzed: 09/18/2024 Units:
Nitrate + Nitrite, Total, as N 122 90 -110 8.15 6.93
QM-010 -The MS recovery was outside acceptance limits but passed Duplicate Spike acceptance limits. The batch
was accepted based on the acceptability of the MSD as the batch Spike .
QC Sample ID: BYI0745-MSD4
Date Prepared: 09/17/2024
Nitrate + Nitrite, Total, as N
CtF WO#: 2411050
www.ChemtechFord.com
Matrix Spike Dup -EPA 353.2
Batch: BYI0745 QC Source Sample: 2411050-02
Date Analyzed: 09/18/2024 Units:
103 2 .36 90-110 20 7.96 6 .93
mg/L
mg/L
mg/L
mg/L
Spk Value MRL OF
0.100 1.00
2.00 0.100 1.00
1.00 0.200 2.00
1.00 0.200 2.00
Page 18 of 22
QC Report for Work Order (WO) -2411050
Analyte % Rec RPD Limits RPD Max Result Source Cone
Blank -EPA 8260D
QC Sample ID: BYI0988-BLK1 Batch: BYI0988
Date Prepared: 09/20/2024 Date Analyzed: 09 /20 /2024 Units :
Carbon Tetrachloride ND
Chloroform ND
Chloromethane ND
Methylene Chloride ND
LCS -EPA 8260D
QC Sample ID : BYI0988-BSI Batch : BYI0988
Date Prepared: 09/20/2024 Date Analyzed: 09/20/2024 Units :
Carbon Tetrachloride 90 .7 70-130 9.07
Chloroform 76.4 70 -1 30 7.64
Chloromethane 63.6 70 -130 6 .36
J-LOW-L -Estimated low due to low recovery of LCS
Methylene Chloride 68.8 70-130 6.88
J-LOW-L -Estimated low due to low recovery of LCS
QC Sample ID: BYI0988-MSI
Date Prepared : 09/20/2024
Carbon Tetrachloride
Chloroform
Chloromethane
Methylene Chloride
QC Sample ID: BYI0988-MSDI
Date Prepared: 09 /20/2024
Carbon Tetrachloride
Chloroform
Chloromethane
Methylene Chloride
CtF WO#: 2411050
www.ChemtechFord.com
Matrix Spike -EPA 8260D
Batch: BYI0988 QC Source Sample : 2411050-02
Date Analyzed: 09/20/2024 Units:
97 .6 70 -130 48.8 ND
80.8 70 -130 40.4 ND
73.2 70 -130 36.6 ND
71.7 70-130 35.8 ND
Matrix Spike Dup -EPA 8260D
Batch: BYI0988 QC Source Sample: 2411050-02
Date Analyzed: 09/20/2024 Units :
94.7 3.02 70 -130 20 47.4 ND
79 .9 1.12 70 -130 20 40.0 ND
75 .6 3.23 70-130 20 37.8 ND
73.3 2.21 70-130 20 36.6 ND
ug/L
ug/L
ug/L
ug/L
Spk Value MRL DF
1.0 1.00
1.0 1.00
1.0 1.00
1.0 1.00
10.0 1.0 1.00
10.0 1.0 1.00
10.0 1.0 1.00
10 .0 1.0 1.00
50 .0 5 .0 1.00
50 .0 5 .0 1.00
50.0 5 .0 1.00
50.0 5 .0 1.00
50.0 5 ,0 1.00
50 .0 5 .0 1.00
50.0 5 .0 1.00
50.0 5.0 1.00
Page 19 of 22
Surrogates Report for Work Order (WO) -2411050
QCID Analyte
BYI0988-BLK1 1,2-Dichloroethane-d4
BYI0988-BLK1 4-Bromofluorobenzene
BYI0988-BLK1 Toluene-dB
BYI0988-BS1 1 ,2-Dichloroethane-d4
BYI0988-BS1 4-Bromofluorobenzene
BYI0988-BS1 Toluene-dB
BYI0988-MS 1 1,2-Dichloroethane-d4
BYI0988-MS 1 4-Bromofluorobenzene
BYI0988-MS 1 Toluene-dB
BYI0988-MSD1 1,2-Dichloroethane-d4
BYI0988-MSD1 4-Bromofluorobenzene
BYI0988-MSD1 Toluene-dB
CtF WO#: 2411050
www.ChemtechFord.com
%Rec LCL UCL Result
Blank -EPA 8260D
90.2 64.2 126 9 .02
97.6 71.4 125 9.76
99.7 63.2 129 9.97
LCS -EPA 8260D
88.8 64.2 126 8.88
97 .2 71.4 125 9.72
98.0 63 .2 129 9.80
Matrix Spike -EPA 8260D
88.2 64.2 126 44.1
89.4 71.4 125 44.7
97.4 63.2 129 48.7
Matrix Spike Dup -EPA 8260D
90.0 64.2 126 45.0
97.3 71.4 125 48.6
97.5 63.2 129 48.8
Spk Value Batch OF
10.0 BYI0988 1.00
10.0 BYI0988 1.00
10.0 BYI0988 1.00
10.0 BYI0988 1.00
10.0 BYI0988 1.00
10.0 BYI0988 1.00
50.0 BYI0988 1.00
50.0 BYI0988 1.00
50.0 BYI0988 1.00
50 .0 BYI0988 1.00
50.0 BYI0988 1.00
50.0 BYI0988 1.00
Page 20 of 22
Surrogate Recoveries (Field Samples)
LabNumber Analyte Result Spklvl %Rec LCL UCL Qualifier
8260 Low Level Volatiles
2411050-01 4-Bromofluorobenzene 9.68 10.0 96.8 71.4 125
2411050-01 Toluene-dB 9.91 10.0 99 .1 63.2 129
2411050-01 1 ,2-Dichloroethane-d4 8.76 10 .0 87.6 64.2 126
8260 Low Level Volatiles
2411050-02 1,2-Dichloroethane-d4 9.29 10.0 92 .9 64 .2 126
2411050-02 4-Bromofluorobenzene 9.09 10.0 90.9 71.4 125
2411050-02 Toluene-dB 9 .99 10 .0 99.9 63.2 129
8260 Low Level Volatiles
2411050-03 Toluene-dB 9.90 10.0 99.0 63.2 129
2411050-03 1,2-Dichloroethane-d4 8.65 10.0 86.5 64.2 126
2411050-03 4-Bromofluorobenzene 9.54 10.0 95.4 71.4 125
8260 Low Level Volatiles
2411050-04 Toluene-dB 9.97 10.0 99 .7 63.2 129
2411050-04 1,2-Dichloroethane-d4 9.07 10.0 90.7 64.2 126
2411050-04 4-Bromofluorobenzene 9 .86 10.0 98 .6 71.4 125
8260 Low Level Volatiles
2411050-05 1,2-Dichloroethane-d4 9.14 10.0 91.4 64.2 126
2411050-05 4-Bromofluorobenzene 9.79 10.0 97 .9 71.4 125
2411050-05 Toluene-dB 9.98 10 .0 99.8 63.2 129
8260 Low Level Volatiles
2411050-06 4-Bromofluorobenzene 9.73 10.0 97.3 71.4 125
2411050-06 1,2-Dichloroethane-d4 9.39 10.0 93.9 64 .2 126
2411050-06 Toluene-dB 10.0 10 .0 100 63 .2 129
8260 Low Level Volatiles
2411050-07 1,2-Dichloroethane-d4 9.30 10.0 93.0 64.2 126
2411050-07 Toluene-dB 9.92 10.0 99.2 63.2 129
2411050-07 4-Bromofluorobenzene 9.86 10 .0 98.6 71 .4 125
8260 Low Level Volatiles
2411050-08 Toluene-dB 9.99 10.0 99 .9 63.2 129
2411050-08 1,2-Dichloroethane-d4 9.38 10.0 93 .8 64.2 126
2411050-08 4-Bromofluorobenzene 9.76 10.0 97 .6 71.4 125
8260 Low Level Volatiles
2411050-09 1,2-Dichloroethane-d4 9.37 10.0 93.7 64.2 126
2411050-09 4-B romofl uorobenze ne 9.82 10.0 98 .2 71.4 125
2411050-09 Toluene-dB 10.1 10 .0 101 63 .2 129
8260 Low Level Volatiles
2411050-10 1,2-Dichloroethane-d4 9.37 10.0 93 .7 64.2 126
2411050-10 4-Bromofluorobenzene 9.14 10.0 91.4 71.4 125
2411050-10 Toluene-dB 9.94 10.0 99.4 63.2 129
CtF WO#: 2411050
www.ChemtechFord.com Page 21 of 22
8260 Low Level Volatiles
2411050-11 Toluene-dB
2411050-11 1,2-Dichloroethane-d4
2411050-11 4-Bromofluorobenzene
8260 Low Level Volatiles
2411050-12 1,2-Dichloroethane-d4
2411050-12 4-Bromofluorobenzene
2411050-12 Toluene-dB
CtF WO#: 2411050
www.ChemtechFord.com
10.0
9.35
9.75
9.30
9.83
9.97
10.0 100 63.2 129
10.0 93.5 64.2 126
10.0 97.5 71.4 125
10.0 93.0 64.2 126
10.0 98.3 71.4 125
10.0 99.7 63.2 129
,
Page 22 of 22
Analyte
QC Sample ID: BYII085-BLK1
Date Prepared: 09/23/2024
Chloride
QC Sample ID: BYI1087-BLK1
Date Prepared: 09/23/2024
Chloride
QC Sample ID: BYII085-BS1
Date Prepared: 09/23/2024
Chloride
QC Sample ID: BYI1087-BS1
Date Prepared: 09/23/2024
Chloride
QC Sample ID: BYII085-MSI
Date Prepared: 09/23/2024
Chloride
QC Sample ID: BYI1085-MSD1
Date Prepared: 09/23/2024
Chloride
CtF WO#: 2411623
www.ChemtechFord.com
QC Report for Work Order (WO) -2411623
% Rec RPO Limits RPO Max Result Source Cone Spk Value MRL OF
Blank -EPA 300.0
Batch: BYI1085
Date Analyzed: 09/23/2024 Units: mg/L
ND 1.00 1.00
Batch: BYil 087
Date Analyzed: 09/24/2024 Units: mg/L
ND 1.00 1.00
LCS -EPA 300.0
Batch: BYII 085
Date Analyzed: 09/23/2024 Units: mg/L
103 90-110 206 200 1.00 1.00
Batch: BYil 087
Date Analyzed: 09/24/2024 Units: mg/L
104 90 -110 208 200 1.00 1.00
Matrix Spike -EPA 300.0
Batch: BYI I 085 QC Source Sample: 2411623-01
Date Analyzed: 09/23/2024 Units: mg/L
99.7 80 -120 58.6 36.5 22.2 1.11 1.00
Matrix Spike Dup -EPA 300.0
Batch: BYI1085 QC Source Sample: 24!1623-01
Date Analyzed: 09/23/2024 Units: mg/L
104 1.65 80 -120 20 59.6 36 .5 22.2 1.11 1.00
Page 29 of 37
Analyte
QC Sample ID: BYil330-BLK1
Date Prepared: 09/26/2024
Nitrate + Nitrite, Total, as N
QC Sample ID: BYI1331-BLK1
Date Prepared: 09/26/2024
Nitrate + Nitrite, Total, as N
QC Sample ID: BYil330-BS1
Date Prepared: 09/26/2024
Nitrate+ Nitrite, Total, as N
QC Sample ID: BYI1331-BS1
Date Prepared: 09/26/2024
Nitrate + Nitrite, Total, as N
QC Sample ID: BYI1330-MS1
Date Prepared: 09/26/2024
Nitrate + Nitrite, Total, as N
QC Sample ID: BYI1330-MSD1
Date Prepared: 09/26/2024
Nitrate+ Nitrite, Total, as N
CtF WO#: 2411623
www.ChemtechFord.com
QC Report for Work Order (WO) -2411623
% Rec RPO Limits RPO Max Result Source Cone
Blank -EPA 353.2
Batch: BYil330
Date Analyzed: 09/26/2024 Units: mg/L
ND
Batch: BYI1331
Date Analyzed: 09/26/2024 Units: mg/L
ND
LCS -EPA 353.2
Batch: BYII330
Date Analyzed: 09/26/2024 Units: mg/L
97.6 90-110 1.95
Batch: BYI1331
Date Analyzed: 09/26/2024 Units: mg/L
99.8 90 -110 2.00
Matrix Spike -EPA 353.2
Batch: BYil330 QC Source Sample: 24Il623-0l
Date Analyzed: 09/26/2024 Units: mg/L
105 90-110 1.05 ND
Matrix Spike Dup -EPA 353.2
Batch: BYil 330 QC Source Sample: 2411623-01
Date Analyzed: 09/26/2024 Units: mg/L
105 0.286 90 -110 20 1.05 ND
Spk Value MRL DF
0.100 1.00
0.100 1.00
2.00 0.100 1.00
2.00 0.100 1.00
1.00 0.100 1.00
1.00 0.100 1.00
Page 30 of 37
QC Report for Work Order (WO) -2411623
Analyte %Rec RPO Limits RPO Max Result Source Cone Spk Value MRL OF
Blank -EPA 8260D
QC Sample ID: BYI1080-BLK1 Batch: BYI 1080
Date Prepared: 09/23/2024 Date Analyzed: 09/23/2024 Units: ug/L
Carbon Tetrachloride ND 1.0 1.00
Chloroform ND 1.0 1.00
Chloromethane ND 1.0 1.00
Methylene Chloride ND 1.0 1.00
QC Sample ID: BYI1243-BLK1 Batch: BYI1243
Date Prepared: 09/25/2024 Date Analyzed: 09/25/2024 Units: ug/L
Carbon Tetrachloride ND 1.0 1.00
Chloroform ND 1.0 1.00
Chloromethane ND 1.0 1.00
Methylene Chloride ND 1.0 1.00
QC Sample ID: BYI1318-BLK1 Batch: BYil 318
Date Prepared: 09/26/2024 Date Analyzed: 09/26/2024 Units: ug/L
Carbon Tetrachloride ND 1.0 1.00
Chloroform ND 1.0 1.00
Chloromethane ND 1.0 1 .00
Methylene Chloride ND 1.0 1.00
QC Sample ID: BYI1318-BLK2 Batch: BYI1318
Date Prepared: 09/26/2024 Date Analyzed: 09/26/2024 Units: ug/L
Carbon Tetrachloride ND 1.0 1.00
Chloroform ND 1.0 1.00
Chloromethane ND 1.0 1.00
Methylene Chloride ND 1.0 1.00
QC Sample ID: BYI1383-BLK1 Batch: BYI1383
Date Prepared: 09/27/2024 Date Analyzed: 09/27/2024 Units: ug/L
Carbon Tetrachloride ND 1.0 1.00
Chloroform ND 1.0 1 .00
Chloromethane ND 1.0 1.00
Methylene Chloride ND 1 .0 1.00
LCS -EPA 8260D
QC Sample ID: BYI1080-BS1 Batch: BYI I 080
Date Prepared: 09/23/2024 Date Analyzed: 09/23/2024 Units: ug/L
Carbon Tetrachloride 77.3 70 -130 7 .73 10.0 1.0 1.00
Chloroform 79.2 70 -130 7.92 10.0 1.0 1.00
Chloromethane 104 70-130 10.4 10.0 1 .0 1.00
Methylene Chloride 80.0 70 -130 8 .00 10.0 1 .0 1.00
QC Sample ID: BYI1243-BS1 Batch: BYI1243
Date Prepared: 09/25/2024 Date Analyzed: 09/25/2024 Units: ug/L
Carbon Tetrachloride 90.0 70-130 9.00 10.0 1 .0 1.00
Chloroform 84.1 70 -130 8.41 10.0 1.0 1.00
Chloromethane 112 70-130 11.2 10.0 1.0 1.00
Methylene Chloride 81.2 70 -130 8.12 10.0 1.0 1.00
QC Sample ID: BYI1318-BS1 Batch: BYII 318
Date Prepared: 09/26/2024 Date Analyzed: 09/26/2024 Units: ug/L
Carbon Tetrachloride 107 70 -130 10.7 10.0 1.0 1.00
Chloroform 81.4 70 -130 8.14 10.0 1.0 1.00
Ch loromethane 86.5 70 -130 8.65 10 .0 1.0 1.00
Methylene Chloride 94.4 70-130 9.44 10.0 1.0 1.00
CtF WO#: 2411623
www.ChemtechFord.com Page 31 of 37
Analyte
QC Sample ID: BYl1383-BSI
Date Prepared: 09/27/2024
Carbon Tetrachloride
Chloroform
Chloromethane
Methylene Chloride
QC Sample ID: BYI1080-MSI
Date Prepared: 09/23/2024
Carbon Tetrachloride
Chloroform
Chloromethane
Methylene Chloride
QC Sample ID: BYl1080-MSDI
Date Prepared: 09/23/2024
Carbon Tetrachloride
Chloroform
Chloromethane
Methylene Chloride
CtF WO#: 2411623
www.ChemtechFord.com
QC Report for Work Order (WO) -2411623
% Rec RPO Limits RPO Max Result Source Cone
LCS -EPA 8260D (cont.)
Batch: BYl1383
Date Analyzed: 09/27/2024 Units: ug/L
88.5 70-130 8.85
73 .7 70-130 7.37
70.5 70-130 7.05
70.7 70-130 7.07
Matrix Spike -EPA 8260D
Batch: BYI I 080 QC Source Sample: 2411623-01
Date Analyzed: 09/23/2024 Units: ug/L
85.9 70-130 43.0 ND
85.1 70 -130 42.6 ND
109 70 -130 54.6 ND
79.4 70-130 39.7 ND
Matrix Spike Dup -EPA 8260D
Batch: BYI I 080 QC Source Sample: 2411623-01
Date Analyzed: 09/23/2024 Units: ug/L
87.9 2.30 70-130 20 44.0 ND
84.4 0.826 70-130 20 42.2 ND
114 4.66 70-130 20 57.2 ND
82.5 3.83 70-130 20 41.2 ND
Spk Value MRL OF .
10.0 1.0 1.00
10 .0 1.0 1.00
10.0 1.0 1.00
10.0 1.0 1 .00
50.0 5.0 1.00
50.0 5.0 1.00
50.0 5.0 1.00
50.0 5.0 1.00
50.0 5.0 1.00
50.0 5.0 1.00
50.0 5.0 1.00
50.0 5.0 1.00
Page 32 of 37
Surrogates Report for Work Order (WO) -2411623
QCID Analyte % Rec LCL UCL Result Spk Value Balch DF
Blank -EPA 8260D
BYl1080-BLK1 1,2-Dichloroethane-d4 92.1 64.2 126 9.21 10.0 BYl1080 1.00
BYl1080-BLK1 4-Bromofluorobenzene 92.8 71.4 125 9.28 10.0 BYl1080 1.00
BYl1080-BLK1 Toluene-dB 100 63.2 129 10.0 10.0 BYl1080 1.00
BYl1243-BLK1 1,2-Dichloroethane-d4 94.8 64.2 126 9.48 10.0 BYl1243 1.00
BYI 1243-BLK1 4-Bromofluorobenzene 93.4 71.4 125 9.34 10.0 BYl1243 1.00
BYl1243-BLK1 Toluene-dB 93.5 63.2 129 9.35 10.0 BYl1243 1.00
BYl1318-BLK1 1 ,2-Dichloroethane-d4 91.8 64.2 126 9.18 10.0 BYl1318 1.00
BYl1318-BLK2 1,2-Dichloroethane-d4 93.1 64.2 126 9.31 10.0 BYl1318 1.00
BYl1318-BLK1 4-Bromofluorobenzene 90.1 71.4 125 9.01 10.0 BYl1318 1.00
BYl1318-BLK2 4-Bromofluorobenzene 89.2 71.4 125 8.92 10.0 BYl1318 1.00
BYl1318-BLK2 Toluene-dB 101 63.2 129 10.1 10.0 BYl1318 1.00
BYl1318-BLK1 Toluene-dB 101 63.2 129 10.1 10.0 BYl1318 1.00
BYl1383-BLK1 1,2-Dichloroethane-d4 85.8 64.2 126 8.58 10.0 BYl1383 1.00
BYl1383-BLK1 4-Bromofluorobenzene 96.3 71.4 125 9.63 10.0 BYl1383 1.00
BYI 1383-BLK1 Toluene-dB 99.7 63.2 129 9.97 10.0 BYl1383 1.00
LCS -EPA 8260D
BYl1080-BS1 1,2-Dichloroethane-d4 94.9 64.2 126 9.49 10.0 BYl1080 1.00
BYl1080-BS1 4-Bromofluorobenzene 95.3 71.4 125 9.53 10.0 BYl1080 1.00
BYl1080-BS1 Toluene-dB 92.9 63.2 129 9.29 10.0 BYl1080 1.00
BYl1243-BS1 1,2-Dichloroethane-d4 91.3 64.2 126 9.13 10.0 BYl1243 1.00
BYl1243-BS1 4-Bromofluorobenzene 93.1 71.4 125 9.31 10.0 BYl1243 1.00
BYI 1243-BS 1 Toluene-dB 91.1 63.2 129 9.11 10.0 BYl1243 1.00
BYl1318-BS1 1,2-Dichloroethane-d4 92.0 64.2 126 9.20 10.0 BYl1318 1.00
BYl1318-BS1 4-Bromofluorobenzene 88.0 71.4 125 8.80 10.0 BYl1318 1.00
BYl1318-BS1 Toluene-dB 101 63.2 129 10.1 10.0 BYl1318 1.00
BYI 1383-8S 1 1 ,2-Dichloroethane-d4 83.4 64.2 126 8.34 10.0 BYl1383 1.00
BYl1383-BS1 4-Bromofluorobenzene 96.4 71.4 125 9.64 10.0 BYl1383 1.00
BYl1383-BS1 Toluene-dB 98.0 63.2 129 9.80 10.0 BYl1383 1.00
Matrix Spike -EPA 8260D
BYI 1080-MS 1 1,2-Dichloroethane-d4 93.7 64.2 126 46.8 50.0 BYl1080 1.00
BYI 1080-MS 1 4-Bromofluorobenzene 90.7 71.4 125 45.4 50.0 BYl1080 1.00
BYl1080-MS1 Toluene-dB 100 63.2 129 50.0 50.0 BYl1080 1.00
BYI 1243-MS 1 1,2-Dichloroethane-d4 93.3 64.2 126 117 125 BYl1243 1.00
BYl1243-MS1 4-Bromofluorobenzene 90.8 71.4 125 114 125 BYl1243 1.00
BYI 1243-MS 1 Toluene-dB 91.3 63.2 129 114 125 BYl1243 1.00
BYl1318-MS1 1,2-Dichloroethane-d4 87.8 64.2 126 43.9 50.0 BYl1318 1.00
BYl1318-MS1 4-Bromofluorobenzene 86.0 71.4 125 43.0 50.0 BYl1318 1.00
BYl1318-MS1 Toluene-dB 99.7 63.2 129 49.8 50.0 BYl1318 1.00
BYI 1383-MS 1 1 ,2-Dichloroethane-d4 85.7 64.2 126 2140 2500 BYl1383 1.00
BYl1383-MS1 4-Bromofluorobenzene 97.3 71.4 125 2430 2500 BYl1383 1.00
BYI 1383-MS 1 Toluene-dB 104 63.2 129 2610 2500 BYl1383 1.00
Matrix Spike Dup -EPA 8260D
BYI 1080-MSD1 1,2-Dichloroethane-d4-92.0 64.2 126 46.0 50.0 BYl1080 1.00
BYl1080-MSD1 4-Bromofluorobenzene 91.0 71.4 125 45.5 50.0 BYl1080 1.00
BYI 1080-MSD1 Toluene-dB 100 63.2 129 50.0 50.0 BYl1080 1.00
CtF WO#: 2411623
www.ChemtechFord.com Page 33 of 37
BYl1243-MSD1 1,2-Dichloroethane-d4
BYl1243-MSD1 4-Bromofluorobenzene
BYI 1243-MSD1 Toluene-dB
BYl1318-MSD1 1,2-Dichloroethane-d4
BYl1318-MSD1 4-Bromofluorobenzene
BYl1318-MSD1 Toluene-dB
BYl1383-MSD1 1,2-Dichloroethane-d4
BYl1383-MSD1 4-Bromofluorobenzene
BYI 1383-MSD1 Toluene-dB
CtF WO#: 2411623
www.ChemtechFord.com
Matrix Spike Dup -EPA 8260D (cont.)
92.0 64.2 126 115
90.7 71.4 125 113
93.1 63.2 129 116
87.3 64.2 126 43.6
86.2 71.4 125 43.1
100 63.2 129 50.0
83.6 64.2 126 2090
96.4 71.4 125 2410
97.2 63.2 129 2430
125 BYl1243 1.00
125 BYl1243 1.00
125 BYl1243 1.00
50.0 BYl1318 1.00
50.0 BYl1318 1.00
50.0 BYl1318 1.00
2500 BYl1383 1.00
2500 BYl1383 1.00
2500 BYl1383 1.00
Page 34 of 37
Surrogate Recoveries (Field Samples)
LabNumber Analyte Result Spklvl %Rec LCL UCL Qualifier
8260 Low Level Volatiles
2411623-01 4-Bromofluorobenzene 9.02 10.0 90.2 71.4 125
2411623-01 Toluene-dB 9.77 10.0 97.7 63.2 129
2411623-01 1 ,2-Dichloroethane-d4 10.2 10.0 102 64.2 126
8260 Low Level Volatiles
2411623-02 1 ,2-Dichloroethane-d4 9.25 10.0 92.5 64.2 126
2411623-02 4-Bromofluorobenzene 9.14 10.0 91.4 71.4 125
2411623-02 Toluene-dB 10.0 10.0 100 63.2 129
8260 Low Level Volatiles
2411623-03 1,2-Dichloroethane-d4 9.73 10.0 97.3 64.2 126
2411623-03 4-Bromofluorobenzene 9.11 10.0 91.1 71.4 125
2411623-03 Toluene-dB 9.47 10.0 94.7 63.2 129
8260 Low Level Volatiles
2411623-04 1,2-Dichloroethane-d4 9.70 10.0 97.0 64.2 126
2411623-04 4-Bromofluorobenzene 9.19 10.0 91.9 71.4 125
2411623-04 Toluene-dB 9.40 10.0 94.0 63.2 129
8260 Low Level Volatiles
2411623-05 1 ,2-Dichloroethane-d4 9.95 10.0 99.5 64.2 126
2411623-05 4-Bromofluorobenzene 9.04 10.0 90.4 71.4 125
2411623-05 Toluene-dB 9.65 10.0 96.5 63.2 129
8260 Low Level Volatiles
2411623-06 1,2-Dichloroethane-d4 9.82 10.0 98.2 64.2 126
2411623-06 4-Bromofluorobenzene 9.01 10.0 90.1 71.4 125
2411623-06 Toluene-dB 9.25 10.0 92.5 63.2 129
8260 Low Level Volatiles
2411623-07 4-Bromofluorobenzene 8.84 10.0 88.4 71.4 125
2411623-07 Toluene-dB 9.37 10.0 93.7 63.2 129
2411623-07 1,2-Dichloroethane-d4 9.89 10.0 98.9 64.2 126
8260 Low Level Volatiles
2411623-08 1,2-Dichloroethane-d4 9.65 10.0 96.5 64.2 126
2411623-08 4-Bromofluorobenzene 9.28 10.0 92.8 71.4 125
2411623-08 Toluene-dB 9.56 10.0 95.6 63.2 129
8260 Low Level Volatiles
2411623-09 Toluene-dB 9.36 10.0 93.6 63.2 129
2411623-09 1 ,2-Dichloroethane-d4 9.72 10.0 97.2 64.2 126
2411623-09 4-Bromofluorobenzene 9.33 10.0 93.3 71.4 125
8260 Low Level Volatiles
2411623-10 Toluene-dB 10.0 10.0 100 63.2 129
2411623-10 4-Bromofluorobenzene 9.10 10.0 91.0 71.4 125
2411623-10 1,2-Dichloroethane-d4 9.94 10.0 99.4 64.2 126
CtF WO#: 2411623
www.ChemtechFord.com Page 35 of 37
8260 Low Level Volatiles
2411623-11 Toluene-dB 10.1 10.0 101 63.2 129
2411623-11 4-Bromofluorobenzene 9.09 10.0 90.9 71.4 125
2411623-11 1,2-Dichloroethane-d4 8.25 10.0 82.5 64.2 126
8260 Low Level Volatiles
2411623-12 4-Bromofluorobenzene 8.98 10.0 89.8 71.4 125
2411623-12 Toluene-dB 10.0 10.0 100 63.2 129
2411623-12 1,2-Dichloroethane-d4 8.99 10.0 89.9 64.2 126
8260 Low Level Volatiles
2411623-13 1,2-Dichloroethane-d4 9.23 10.0 92.3 64.2 126
2411623-13 Toluene-dB 10.0 10.0 100 63.2 129
2411623-13 4-Bromofluorobenzene 8.89 10.0 88.9 71.4 125
8260 Low Level Volatiles
2411623-14 1,2-Dichloroethane-d4 9.45 10.0 94.5 64.2 126
2411623-14 4-Bromofluorobenzene 8.92 10.0 89.2 71.4 125
2411623-14 Toluene-dB 10.1 10.0 101 63.2 129
8260 Low Level Volatiles
2411623-15 1,2-Dichloroethane-d4 9.55 10.0 95.5 64.2 126
2411623-15 4-Bromofluorobenzene 8.93 10.0 89.3 71.4 125
2411623-15 Toluene-dB 10.0 10.0 100 63.2 129
8260 Low Level Volatiles
2411623-16 4-Bromofluorobenzene 8.94 10.0 89.4 71.4 125
2411623-16 1,2-Dichloroethane-d4 9.54 10.0 95.4 64.2 126
2411623-16 Toluene-dB 10.1 10.0 101 63.2 129
8260 Low Level Volatiles
2411623-17 1,2-Dichloroethane-d4 9.68 10.0 96.8 64.2 126
2411623-17 4-Bromofluorobenzene 9.08 10.0 90.8 71.4 125
2411623-17 Toluene-dB 10.0 10.0 100 63.2 129
8260 Low Level Volatiles
2411623-18 1,2-Dichloroethane-d4 9.56 10.0 95.6 64.2 126
2411623-18 Toluene-dB 10.1 10.0 101 63.2 129
2411623-18 4-Bromofluorobenzene 8.98 10.0 89.8 71.4 125
8260 Low Level Volatiles
2411623-19 Toluene-dB 10.0 10.0 100 63.2 129
2411623-19 4-Bromofluorobenzene 8.91 10.0 89.1 71.4 125
2411623-19 1,2-Dichloroethane-d4 9.60 10.0 96.0 64.2 126
8260 Low Level Volatiles
2411623-20 1,2-Dichloroethane-d4 9.07 10.0 90.7 64.2 126
2411623-20 4-Bromofluorobenzene 10.2 10.0 102 71.4 125
2411623-20 Toluene-dB 10.0 10.0 100 63.2 129
8260 Low Level Volatiles
2411623-21 Toluene-dB 10.2 10.0 102 63.2 129
2411623-21 4-Bromofluorobenzene 9.06 10.0 90.6 71.4 125
2411623-21 1,2-Dichloroethane-d4 9.73 10.0 97.3 64.2 126
CtF WO#: 2411623
www.ChemtechFord.com Page 36 of 37
8260 Low Level Volatiles
2411623-22 1,2-Dichloroethane-d4
2411623-22 4-Bromofluorobenzene
2411623-22 Toluene-dB
8260 Low Level Volatiles
2411623-23 Toluene-dB
2411623-23 1,2-Dichloroethane-d4
2411623-23 4-Bromoft uorobenzene
CtF WO#: 2411623
www.ChemtechFord.com
9.74
8.96
10.2
10.0
8.07
9.01
10.0 97.4 64 .2 126
10.0 89.6 71.4 125
10.0 102 63.2 129
10.0 100 63.2 129
10.0 80.7 64.2 126
10.0 90.1 71.4 125
Page 37 of 37
Tab I
Quality Assurance and Data Validation Tables
1-1 • Field QA/QC Evaluation
1x Casing 2x Casing
Location Volume Volume Pumped Volume Volume Check Conductivity RPD pH RPD Temperature RPD Redox RPD Turbidity RPD Dissolved Oxygen RPD
MW-04 NA Continuousl y Pumped we ll --1892 NC 7.38 NC 16.16 NC 331 NC 0 NC 36.4 NC
TW4-01 NA Continuously Pumped well -2163 NC 7.42 NC 17.28 NC 303 NC 0 NC 90.0 NC
TW4-02 NA Continuously Pumped well --3750 NC 7.26 NC 17.14 NC 301 -i-J"C 0 NC 88.8 NC
TW4-0"3 48.32 68.75 96.64 Pumped Dry 1774 1771 0.17 6.74 6.77 0.44 15.39 15.35 0.26 NM NC NM NC NM NC
TW4-04 NA Continuously Pumped well --2309 NC 7.55 NC 17.24 NC 286 NC 0 NC 104.0 NC
TW4-05 31.27 88.00 62.54 okay 1523 1510 0.86 6.85 6.89 0.58 15.54 15.54 0.00 456 454 0.44 3.9 3.8 2.60 55.00 54.0 1.83
TW4-06 12.11 13.75 24.22 Pumped Dry 3740 374 3 0.08 6.98 6.97 0.14 15 .08 f 5.05 0.20 NM NC NM NC NM NC
TW4-07 25.10 55.00 50.2 Pum P.ed Dry 1731 1734 0.1 7 7 .30 7.27 0.41 14.26 14.30 0.28 NM NC NM NC NM NC
TW4-08 26 .63 66.00 53.26 okay 4319 4320 0.02 6.66 6.70 0.60 15.36 15.34 0.13 379 377 0.53 0 0 0.00 0.9 0.9 0.00
TW4-09 31 .50 88.00 63 oka y 2370 2369 0.04 6.75 6.75 0.00 15.24 15.23 0.07 356 355 0.28 24.0 24.5 2 .06 0.9 0.9 0 ,00
TW4-10 27.51 35.75 55.02 Pumped1)IY 2 157 2164 0.32 7.09 7.07 0.~8 14 .38 14.40 0.14 NM NC NM NC NM NC
TW4-11 NA Continuously Pumped well -3561 'N C 7.18 NC 17.50 NC 257 NC 0 NC 94 .1 NC
TW4-12 29.8 7 36.66 59.74 Pumped Dry 1521 1525 0.26 7.52 7.53 0.13 14.56 14.55 0.07 NM NC NM NC NM NC
TW4-13 30.97 41.25 61.94 Pu n:!Q ed Dry 2026 2034 0.39 7.44 7.43 0.13 14.58 14.57 0.07 NM NC NM NC NM NC
TW4-14 11.59 13.75 23.18 -P umped DrY 507 8 5080 0.04 7.02 7.00 0.29 14.77 14.75 0.14 NM NC NM NC NM NC -
MW-26 NA Continuously Pumped well -3451 NC 7.11 NC 17.04 NC 331 NC 0 NC 34 .7 NC
TW4-16 47.59 110.00 95.18 okay 3471 3463 0.23 6.75 6.79 0.59 15.05 15.04 0.07 435 431 0.92 27.0 26.4 2.25 3.0 2 .9 3.39
MW-32 30.49 65.10 60 .98 okay 3471 3478 0.20 6.63 6.64 0.15 15.93 15.90 0.19 194 191 1.56 6.0 6.2 3.28 9.8 9 .7 1.03
TW4-18 40.45 99.00 80 .9 oka y 1968 1948 1.02 6.58 6.60 0.30 15 .63 15.62 0.06 443 443 0.00 12.6 13.0 3.13 9.4 9-5 1.06
TW4-19 NA Continuously Pumped well -2745 NC 7.04 NC 17.50 NC 423 NC 0 NC 34.1 NC
TW4-21 NA Continuously Pumped well -2541 NC 6.92 NC 16.58 NC 430 NC 51.0 NC 115.9 NC
TW4-22 NA Continuously Pumped well -4992 NC 6.78 NC 16.35 NC 391 NC 2.0 NC 61.4 NC
TW4-23 25.25 77.00 50.5 okay 3316 3326 0.30 6.79 6.81 0 .29 14 .66 14.66 0.00 218 210 3.7 4 2.8 3 .0 6.90 9.9 10.0 1.01
TW4-24 NA Continuously Pumped well -6471 NC 7.04 NC 16.41 NC 401 NC 0 NC 28.7 NC
II TW4-25 NA Continuously Pumped well -2504 NC 7.25 NC 16.17 NC 408 NC 0 NC 23.2 NC
TW4-2ff 7.67 8.25 15.34 Pumped Dry 4770 4776 0.13 7.16 7.12 0.56 14.70 14.71 0.07 NM Ne NM NC NM NC
TW4-27 10 .65 11.00 21.3 Pumped Dry 4874 4878 0.08 6.52 6.51 0.15 15.24 15.30 0.39 NM NC NM NC NM ,-NC
TW4-28 37.90 46.75 75 .8 Pum P.ed Dry 1637 1641 0.24 7.55 7.54 ____p .13 ..JA,..3L_ 14.35 0.14 NM NC NM NC NM NC
TW4-29 9.45 8.25 18.9 P umped D ry 3864 38 73 0.23 7.25 7.23"' 0.28 14.64 1.f~ ~----NM NC NM NC NM NC
TW4-30 11.81 13.75 23.62 Pum ped Dry 4420 4426 0.14 6.06 6.07 0.16 15 .40 15 .36 0.2-6 NM NC NM NC NM NC
TW4-31 20.4 5 22.00 40.9 Pumped Dry 3581 3582 0.03 6.97 7.00 0.43 15.20 15 .15 0.33 NM Ne NM NC NM NC
TW4-32 37 ,16 77.00 74.32 okay 5751 5788 0.64 4.11 4.11 0.00 15.28 15.25 0.20 490 490 0 .00 15 .0 14.0 6.90 1.0 1.0 0.00
TW4-33 4.12 3.66 8.2~ Pum ped Dry 4495 4500 0.11 6.95 7.00 0.72 15.02 14.97 0.33 NM NC NM NC NM NC
TW4-34 11.30 13.75 22.6 Pumpe oDry 35 11 3520 0.26 6.99 7.04 0.71 15.29 15.26 0.20 NM NC NM NC NM NC
TW4-35 6.79 7.33 13.58 Pum P.ed Dry 4206 4204 0.05 6.80 6.79 0.1 5 15 .1 5 15.10 0.33 NM NC NM NC NM NC
TWll-36 26·.17 33.00 52.34 Pumped Dry 2348 2358 0.42 7.37 7.35 0.27 14.67 14.67 0.00 NM Ne NM NC NM NC
TW4-37 NA Continuously Pumped well -4764 NC 6.62 NC 16.80 NC 388 NC 0 NC 53.0 NC
TW4-38 34 .01 77.00 68.02 okay 1860 1797 3.4 5 6 .80 6 .84 0 .59 14.95 14 .92 0.20 370 368 0.54 6.2 6.3 1.60 68.0 67.0 1.48
TW4-39 NA Continuously Pumped well -2368 NC 7.14 NC 16.47 NC 375 NC 9.0 NC 97.0 NC
TW4-40 NA Continuously Pumped well 1, -4063 NC 7.20 NC 17 .27 NC 286 NC 2.3 NC 113.0 NC
TW4-41 NA Continuously Pumped well -2661 NC 7.34 NC 17 .03 NC 303 NC 0 NC 96.1 NC
TW4-42 9.10 11.00 18.2 Pumped Dry 3669 3676 0.19 7.30 7.33 0.41 14.75 14.79 0.27 NM NC NM NC NM NC
TW4-43 14.37 22.00 2 8.74 Pum ped Dry 3466 3469 0.09 6.95 6.94 0.14 15.75 15.71 0.25 NM NC NM NC NM f\TC
MW-04, MW-26, MW-26, MW-26, TW4-01, TW4-02, TW4-04, TW4-11, TW4-19, TW4-21, TW4-22, TW4-24, TW4-25, TW4-37, TW4-39, TW4'-40 , TW4-41 are continually pumped wells.
TW4-©3, TW4-06, TW4-07, TW4-10, TW4-12, TW4-13, TW4-14, TW4-26, TW4-27, TW4-28, TW4-29, 1W4-30, TW4-31, TW4-33, TW4-34, TW4-35, TW4-36, TW4-42, TW:if -43 were pumped dry and sampled after recovery._..·-------------------~---------'
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
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.
I
1-2: Holding Time Evaluation
Hold Time Allowed Hold Hold Time
Location ID Parameter Name Sample Date Analysis Date (Oays) Time (Days) Check
Trip Blank Carbon Tetrachloride 08/20/2024 08/28/2024 8 14 OK
Trip Blank Chloroform 08/20/2024 08/28/2024 8 14 OK
Trip Blank Chloromethane 08/20/2024 08/28/2024 8 14 OK
Trip Blank Methylene Chloride 08/20/2024 08/28/2024 8 14 OK
Trip Blank Carbon Tetrachloride 09/11/2024 09/20/2024 9 14 OK
Trip Blank Chloroform 09/11/2024 09/20/2024 9 14 OK
Trip Blank Chloromethane 09/11/2024 09/20/2024 9 14 OK
Trip Blank Methylene Chloride 09/11/2024 09/20/2024 9 14 OK
Trip Blank Carbon Tetrachloride 09/16/2024 09/26/2024 10 14 OK
Trip Blank Chloroform 09/16/2024 09/26/2024 10 14 OK
Trip Blank Chloromethane 09/16/2024 09/26/2024 10 14 OK
Trip Blank Methylene Chloride 09/16/2024 09/26/2024 10 14 OK
MW-04 Chloride 08/20/2024 08/26/2024 6 28 OK
MW-04 Carbon Tetrachloride 08/20/2024 08/27/2024 7 14 OK
MW-04 Chloroform 08/20/2024 08/27/2024 7 14 OK
MW-04 Chloromethane 08/20/2024 08/27/2024 7 14 OK
MW-04 Methylene Chloride 08/20/2024 08/27/2024 7 14 OK
MW-04 Nitrate+ Nitrite as N 08/20/2024 08/28/2024 8 28 OK
TW4-0l Chloride 08/20/2024 08/26/2024 6 28 OK
TW4-0l Carbon Tetrachloride 08/20/2024 08/27/2024 7 14 OK
TW4-0l Chloroform 08/20/2024 08/27/2024 7 14 OK
TW4-0l Chloromethane 08/20/2024 08/27/2024 7 14 OK
TW4-01 Methylene Chloride 08/20/2024 08/27/2024 7 14 OK
TW4-01 Nitrate+ Nitrite as N 08/20/2024 08/28/2024 8 28 OK
TW4-02 Chloride 08/20/2024 08/26/2024 6 28 OK
TW4-02 Carbon Tetrachloride 08/20/2024 08/27/2024 7 14 OK
TW4-02 Chloroform 08 /20/2024 08/27/2024 7 14 OK
TW4-02 Chloromethane 08/20/2024 08/27/2024 7 14 OK
TW4-02 Methylene Chloride 08 /20/2024 08/27/2024 7 14 OK
TW4-02 Nitrate+ Nitrite as N 08/20/2024 08/28/2024 8 28 OK
TW4-03 Chloride 09/12/2024 09/16/2024 4 28 OK
TW4-03 Carbon Tetrachloride 09/12/2024 09/20/2024 8 14 OK
TW4-03 Chloroform 09/12/2024 09/20/2024 8 14 OK
TW4-03 Chloromethane 09/12/2024 09/20/2024 8 14 OK
TW4-03 Methylene Chloride 09/12/2024 09/20/2024 8 14 OK
TW4-03 Nitrate+ Nitrite as N 09/12/2024 09/18/2024 6 28 OK
TW4-04 Chloride 08/20/2024 08/26/2024 6 28 OK
TW4-04 Carbon Tetrachloride 08/20/2024 08/27/2024 7 14 OK
TW4-04 Chloroform 08 /20/2024 08/27/2024 7 14 OK
TW4-04 Chloromethane 08/20/2024 08/27/2024 7 14 OK
TW4-04 Methylene Chloride 08/20/2024 08/27/2024 7 14 OK
TW4-04 Nitrate+ Nitrite as N 08/20/2024 08/28/2024 8 28 OK
TW4-05 Chloride 09/18/2024 09/24/2024 6 28 OK
TW4-05 Carbon Tetrachloride 09/18/2024 09/26/2024 8 14 OK
TW4-05 Chloroform 09/18/2024 09/26/2024 8 14 OK
TW4-05 Chloromethane 09/18/2024 09/26/2024 8 14 OK
TW4-05 Methylene Chloride 09/18/2024 09/26/2024 8 14 OK
TW4-05 Nitrate + Nitrite as N 09/18/2024 09/26/2024 8 28 OK
TW4-06 Chloride 09/17/2024 09/24/2024 7 28 OK
TW4-06 Carbon Tetrachloride 09/17/2024 09/25/2024 8 14 OK
TW4-06 Chloroform 09/17/2024 09/25/2024 8 14 OK
TW4-06 Chloromethane 09/17/2024 09/25/2024 8 14 OK
TW4-06 Methylene Chloride 09/17/2024 09/25/2024 8 14 OK
TW4-06 Nitrate+ Nitrite as N 09/17/2024 09/26/2024 9 28 OK
1-2: Holding Time Evaluation
Hold Time Allowed Hold Hold Time
Location ID Parameter Name Sample Date Analysis Date (Days) Time (Days) Check
TW4-07 Chloride 09/18/2024 09/24/2024 6 28 OK
TW4-07 Carbon Tetrachloride 09/18/2024 09/26/2024 8 14 OK
TW4-07 Chloroform 09/18/2024 09/26/2024 8 14 OK
TW4-07 Chloromethane 09/18/2024 09/26/2024 8 14 OK
TW4-07 Methylene Chloride 09/18/2024 09/26/2024 8 14 OK
TW4-07 Nitrate+ Nitrite as N 09/18/2024 09/26/2024 8 28 OK
TW4-08 Chloride 09/17/2024 09/24/2024 7 28 OK
TW4-08 Carbon Tetrachloride 09/17/2024 09/25/2024 8 14 OK
TW4-08 Chloroform 09/17/2024 09/25/2024 8 14 OK
TW4-08 Nitrate+ Nitrite as N 09/17/2024 09/26/2024 9 28 OK
TW4-08 Chloromethane 09/17/2024 09/25/2024 8 14 OK
TW4-08 Methylene Chloride 09/17/2024 09/25/2024 8 14 OK
TW4-09 Chloride 09/17/2024 09/24/2024 7 28 OK
TW4-09 Carbon Tetrachloride 09/17/2024 09/25/2024 8 14 OK
TW4-09 Chloroform 09/17/2024 09/25/2024 8 14 OK
TW4-09 Chloromethane 09/17/2024 09/25/2024 8 14 OK
TW4-09 Methylene Chloride 09/17/2024 09/25/2024 8 14 OK
TW4-09 Nitrate + Nitrite as N 09/17/2024 09/26/2024 9 28 OK
TW4-10 Chloride 09/18/2024 09/24/2024 6 28 OK
TW4-IO Carbon Tetrachloride 09/18/2024 09/26/2024 8 14 OK
TW4-10 Chloroform 09/18/2024 09/26/2024 8 14 OK
TW4-10 Chloromethane 09/18/2024 09/26/2024 8 14 OK
TW4-IO Methylene Chloride 09/18/2024 09/26/2024 8 14 OK
TW4-I0 Nitrate+ Nitrite as N 09/18/2024 09/26/2024 8 28 OK
TW4-l l Chloride 08/20/2024 08/27/2024 7 28 OK
TW4-l l Carbon Tetrachloride 08/20/2024 08/28/2024 8 14 OK
TW4-l 1 Chloroform 08/20/2024 08/28/2024 8 14 OK
TW4-l l Chloromethane 08/20/2024 08/28/2024 8 14 OK
TW4-l l Methylene Chloride 08/20/2024 08/28/2024 8 14 OK
TW4-l l Nitrate + Nitrite as N 08/20/2024 08/28/2024 8 28 OK
TW4-12 Chloride 09/12/2024 09/16/2024 4 28 OK
TW4-12 Carbon Tetrachloride 09/12/2024 09/20/2024 8 14 OK
TW4-12 Chloroform 09/12/2024 09/20/2024 8 14 OK
TW4-12 Chloromethane 09/12/2024 09/20/2024 8 14 OK
TW4-12 Methylene Chloride 09/12/2024 09/20/2024 8 14 OK
TW4-12 Nitrate+ Nitrite as N 09/12/2024 09/18/2024 6 28 OK
TW4-12R • Chloride 09/11/2024 09/16/2024 5 28 OK
TW4-12R Carbon Tetrachloride 09/11/2024 09/20/2024 9 14 OK
TW4-12R Chloroform 09/11/2024 09/20/2024 9 14 OK
TW4-12R Chloromethane 09/11/2024 09/20/2024 9 14 OK
TW4-12R Methylene Chloride 09/11/2024 09/20/2024 9 14 OK
TW4-12R Nitrate+ Nitrite as N 09/11/2024 09/18/2024 7 28 OK
TW4-13 Chloride 09/12/2024 09/17/2024 5 28 OK
TW4-13 Carbon Tetrachloride 09/12/2024 09/20/2024 8 14 OK
TW4-13 Chloroform 09/12/2024 09/20/2024 8 14 OK
TW4-13 Chloromethane 09/12/2024 09/20/2024 8 14 OK
TW4-13 Methylene Chloride 09/12/2024 09/20/2024 8 14 OK
TW4-13 Nitrate+ Nitrite as N 09/12/2024 09/18/2024 6 28 OK
TW4-14 Chloride 09/12/2024 09/17/2024 5 28 OK
TW4-14 Carbon Tetrachloride 09/12/2024 09/20/2024 8 14 OK
TW4-14 Chloroform 09/12/2024 09/20/2024 8 14 OK
TW4-14 Chloromethane 09/12/2024 09/20/2024 8 14 OK
TW4-14 Methylene Chloride 09/12/2024 09/20/2024 8 14 OK
TW4-14 Nitrate+ Nitrite as N 09/12/2024 09/18/2024 6 28 OK
1-2: Holding Time Evaluation
Hold Time Allowed Hold Hold Time
Location ID Parameter Name Sample Date Analysis Date (Days) Time (Days) Check
MW-26 Chloride 08/20/2024 08/27/2024 7 28 OK
MW-26 Carbon Tetrachloride 08/20/2024 08/28/2024 8 14 OK
MW-26 Chloroform 08/20/2024 08/28/2024 8 14 OK
MW-26 Chloromethane -08/20/2024 08/28/2024 8 14 OK
MW-26 Methylene Chloride 08/20/2024 08/28/2024 8 14 OK
MW-26 Nitrate+ Nitrite as N 08/20/2024 08/28/2024 8 28 OK
TW4-16 Chloride 09/18/2024 09/24/2024 6 28 OK
TW4-16 Carbon Tetrachloride 09/18/2024 09/26/2024 8 14 OK
TW4-16 Chloroform 09/18/2024 09/26/2024 8 14 OK
TW4-16 Chloromethane 09/18/2024 09/26/2024 8 14 OK
TW4-16 Methylene Chloride 09/18/2024 09/26/2024 8 14 OK
TW4-16 Nitrate+ Nitrite as N 09/18/2024 09/26/2024 8 28 OK
MW-32 Chloride 09/16/2024 09/23/2024 7 28 OK
MW-32 Carbon Tetrachloride 09/16/2024 09/23/2024 7 14 OK
MW-32 Chloroform 09/16/2024 09/23/2024 7 14 OK
MW-32 Chloromethane 09/16/2024 09/23/2024 7 14 OK
MW-32 Methylene Chloride 09/16/2024 09/23/2024 7 14 OK
MW-32 Nitrate+ Nitrite as N 09/16/2024 09/26/2024 10 28 OK
TW4-18 Chloride 09/18/2024 09/24/2024 6 28 OK
TW4-18 Carbon Tetrachloride 09/18/2024 09/26/2024 8 14 OK
TW4-18 Chloroform 09/18/2024 09/26/2024 8 14 OK
TW4-18 Chloromethane 09/18/2024 09/26/2024 8 14 OK
TW4-18 Methylene Chloride 09/18/2024 09/26/2024 8 14 OK
TW4-18 Nitrate+ Nitrite as N 09/18/2024 09/26/2024 8 28 OK
TW4-19 Chloride 08/20/2024 08/26/2024 6 28 OK
TW4-19 Carbon Tetrachloride 08/20/2024 08/27/2024 7 14 OK
TW4-19 Chloroform 08/20/2024 08/27/2024 7 14 OK
TW4-19 Chloromethane 08/20/2024 08/27/2024 7 14 OK
TW4-19 Methylene Chloride 08/20/2024 08/27/2024 7 14 OK
TW4-19 Nitrate+ Nitrite as N 08/20/2024 08/28/2024 8 28 OK
TW4-21 Chloride 08/20/2024 08/26/2024 6 28 OK
TW4-21 Carbon Tetrachloride 08/20/2024 08/27/2024 7 14 OK
TW4-21 Chloroform 08/20/2024 08/27/2024 7 14 OK
TW4-21 Chloromethane 08/20/2024 08/27/2024 7 14 OK
TW4-21 Methylene Chloride 08/20/2024 08/27/2024 7 14 OK
TW4-21 Nitrate+ Nitrite as N 08/20/2024 08/28/2024 8 28 OK
TW4-22 Chloride 08/20/2024 08/26/2024 6 28 OK
TW4-22 Carbon Tetrachloride 08/20/2024 08/28/2024 8 14 OK
TW4-22 Chloroform 08/20/2024 08/28/2024 8 14 OK
TW4-22 Chloromethane 08/20/2024 08/28/2024 8 14 OK
TW4-22 Methylene Chloride 08/20/2024 08/28/2024 8 14 OK
TW4-22 Nitrate+ Nitrite as N 08/20/2024 08/28/2024 8 28 OK
TW4-23 Chloride 09/17/2024 09/23/2024 6 28 OK
TW4-23 Carbon Tetrachloride 09/17/2024 09/25/2024 8 14 OK
TW4-23 Chloroform 09/17/2024 09/25/2024 8 14 OK
TW4-23 Chloromethane 09/17/2024 09/25/2024 8 14 OK
TW4-23 Methylene Chloride 09/17/2024 09/25/2024 8 14 OK
TW4-23 Nitrate+ Nitrite as N 09/17/2024 09/26/2024 9 28 OK
TW4-24 Chloride 08/20/2024 08/26/2024 6 28 OK
TW4-24 Carbon Tetrachloride 08/20/2024 08/27/2024 7 14 OK
TW4-24 Chloroform 08/20/2024 08/27/2024 7 14 OK
TW4-24 Chloromethane 08/20/2024 08/27/2024 7 14 OK
TW4-24 Methylene Chloride 08/20/2024 08/27/2024 7 14 OK
TW4-24 Nitrate+ Nitrite as N 08/20/2024 08/28/2024 8 28 OK
l-2: Holding Time Evaluation
Hold Time Allowed Hold Hold Time
Location ID Parameter Name Sample Date Analysis Date (Days) Time (Days) Check
TW4-25 Chloride 08/20/2024 08/23/2024 3 28 OK
TW4-25 Carbon Tetrachloride 08/20/2024 08/23/2024 3 14 OK
TW4-25 Chloroform 08/20/2024 08/23/2024 3 14 OK
TW4-25 Chloromethane 08/20/2024 08/23/2024 3 14 OK
TW4-25 Methylene Chloride 08/20/2024 08/23/2024 3 14 OK
TW4-25 Nitrate+ Nitrite as N 08/20/2024 08/28/2024 8 28 OK
TW4-26 Chloride 09/18/2024 09/24/2024 6 28 OK
TW4-26 Carbon Tetrachloride 09/18/2024 09/26/2024 8 14 OK
TW4-26 Chloroform 09/18/2024 09/26/2024 8 14 OK
TW4-26 Chloromethane 09/18/2024 09/26/2024 8 14 OK
TW4-26 Methylene Chloride 09/18/2024 09/26/2024 8 14 OK
TW4-26 Nitrate + Nitrite as N 09/18/2024 09/26/2024 8 28 OK
TW4-27 Chloride 09/17/2024 09/24/2024 7 28 OK
TW4-27 Carbon Tetrachloride 09/17/2024 09/25/2024 8 14 OK
TW4-27 Chloroform 09/17/2024 09/25/2024 8 14 OK
TW4-27 Chloromethane 09/17/2024 09/25/2024 8 14 OK
TW4-27 Methylene Chloride 09/17/2024 09/25/2024 8 14 OK
TW4-27 Nitrate + Nitrite as N 09/17/2024 09/26/2024 9 28 OK
TW4-28 Chloride 09/12/2024 09/16/2024 4 28 OK
TW4-28 Carbon Tetrachloride 09/12/2024 09/20/2024 8 14 OK
TW4-28 Chloroform 09/12/2024 09/20/2024 8 14 OK
TW4-28 Chloromethane 09/12/2024 09/20/2024 8 14 OK
TW4-28 Methylene Chloride 09/12/2024 09/20/2024 8 14 OK
TW4-28 Nitrate+ Nitrite as N 09/12/2024 09/18/2024 6 28 OK
TW4-29 Chloride 09/18/2024 09/24/2024 6 28 OK
TW4-29 Carbon Tetrachloride 09/18/2024 09/26/2024 8 14 OK
TW4-29 Chloroform 09/18/2024 09/26/2024 8 14 OK
TW4-29 Chloromethane 09/18/2024 09/26/2024 8 14 OK
TW4-29 Methylene Chloride 09/18/2024 09/26/2024 8 14 OK
TW4-29 Nitrate+ Nitrite as N 09/18/2024 09/26/2024 8 28 OK
TW4-30 Chloride 09/18/2024 09/24/2024 6 28 OK
TW4-30 Carbon Tetrachloride 09/18/2024 09/26/2024 8 14 OK
TW4-30 Chloroform 09/18/2024 09/26/2024 8 14 OK
TW4-30 Chloromethane 09/18/2024 09/26/2024 8 14 OK
TW4-30 Methylene Chloride 09/18/2024 09/26/2024 8 14 OK
TW4-30 Nitrate+ Nitrite as N 09/18/2024 09/26/2024 8 28 OK
TW4-30R Chloride 09/17/2024 09/24/2024 7 28 OK
TW4-30R Carbon Tetrachloride 09/17/2024 09/26/2024 9 14 OK
TW4-30R Chloroform 09/17/2024 09/26/2024 9 14 OK
TW4-30R Chloromethane 09/17/2024 09/26/2024 9 14 OK
TW4-30R Methylene Chloride 09/17/2024 09/26/2024 9 14 OK
TW4-30R Nitrate+ Nitrite as N 09/17/2024 09/26/2024 9 28 OK
TW4-31 Chloride 09/12/2024 09/17/2024 5 28 OK
TW4-31 Carbon Tetrachloride 09/12/2024 09/20/2024 8 14 OK
TW4-31 Chloroform 09/12/2024 09/20/2024 8 14 OK
TW4-31 Chloromethane 09/12/2024 09/20/2024 8 14 OK
TW4-31 Methylene Chloride 09/12/2024 09/20/2024 8 14 OK
TW4-31 Nitrate+ Nitrite as N 09/12/2024 09/18/2024 6 28 OK
TW4-32 Chloride 09/12/2024 09/17/2024 5 28 OK
TW4-32 Carbon Tetrachloride 09/12/2024 09/20/2024 8 14 OK
TW4-32 Chloroform 09/12/2024 09/20/2024 8 14 OK
TW4-32 Chloromethane 09/12/2024 09/20/2024 8 14 OK
TW4-32 Methylene Chloride 09/12/2024 09/20/2024 8 14 OK
TW4-32 Nitrate+ Nitrite as N 09/12/2024 09/18/2024 6 28 OK
1-2: Holding Time Evaluation
Hold Time Allowed Hold Hold Time
Location ID Parameter Name Sample Date Analysis Date (Days) Time (Days) Check
TW4-33 Chloride 09/18/2024 09/24/2024 6 28 OK
TW4-33 Carbon Tetrachloride 09/18 /2024 09/26/2024 8 14 OK
TW4-33 Chloroform 09/18/2024 09/26/2024 8 14 OK
TW4-33 Chloromethane 09/18/2024 09/26/2024 8 14 OK
TW4-33 Methylene Chloride 09/18/2024 09/26/2024 8 14 OK
TW4-33 Nitrate+ Nitrite as N 09/18 /2024 09/26/2024 8 28 OK
TW4-34 Chloride 09/17/2024 09/23/2024 6 28 OK
TW4-34 Carbon Tetrachloride 09/17/2024 09/25 /2024 8 14 OK
TW4-34 Chloroform 09/17 /2024 09/25 /2024 8 14 OK
TW4-34 Chloromethane 09/17/2024 09 /25 /2024 8 14 OK
TW4-34 Methylene Chloride 09/17/2024 09/25/2024 8 14 OK
TW4-34 Nitrate+ Nitrite as N 09/17/2024 09/26/2024 9 28 OK
TW4-35 Chloride 09/17/2024 09/24/2024 7 28 OK
TW4-35 Carbon Tetrachloride 09/17/2024 09/25/2024 8 14 OK
TW4-35 Chloroform 09/17 /2024 09 /25/2024 8 14 OK
TW4-35 Chloromethane 09/17 /2024 09 /25 /2024 8 14 OK
TW4-35 Methylene Chloride 09/17/2024 09/25/2024 8 14 OK
TW4 -35 Nitrate + Nitrite as N 09/17/2024 09/26/2024 9 28 OK
TW4-36 Chloride 09/12/2024 09/17/2024 5 28 OK
TW4-36 Carbon Tetrachloride 09 /12/2024 09 /20 /2024 8 14 OK
TW4-36 Chloroform 09 /12/2024 09/20/2024 8 14 OK
TW4-36 Chloromethane 09/12/2024 09/20/2024 8 14 OK
TW4-36 Methylene Chloride 09/12/2024 09/20/2024 8 14 OK
TW4-36 Nitrate+ Nitrite as N 09/12/2024 09/18/2024 6 28 OK
TW4-37 Chloride 08/20/2024 08/27/2024 7 28 OK
TW4-37 Carbon Tetrachloride 08 /20 /2024 08/28 /2024 8 14 OK
TW4-37 Chloroform 08 /20 /2024 08 /28/2024 8 14 OK
TW4-37 Chloromethane 08/20/2024 08/28/2024 8 14 OK
TW4-37 Methylene Chloride 08/20 /2024 08 /28 /2024 8 14 OK
TW4-37 Nitrate + Nitrite as N 08 /20 /2024 08/28/2024 8 28 OK
TW4-38 Chloride 09 /17 /2024 09/23/2024 6 28 OK
TW4-38 Carbon Tetrachloride 09/17/2024 09/25/2024 8 14 OK
TW4-38 Chloroform 09/17/2024 09/25/2024 8 14 OK
TW4-38 Chloromethane 09/17/2024 09/25/2024 8 14 OK
TW4-38 Methylene Chloride 09/17/2024 09 /25/2024 8 14 OK
TW4-38 Nitrate+ Nitrite as N 09/17/2024 09 /26 /2024 9 28 OK
TW4-39 Chloride 08 /20 /2024 08 /27/2024 7 28 OK
TW4-39 Carbon Tetrachloride 08/20/2024 08 /28 /2024 8 14 OK
TW4-39 Chloroform 08 /20 /2024 08/28/2024 8 14 OK
TW4-39 Chloromethane 08 /20 /2024 08 /28 /2024 8 14 OK
TW4-39 Methylene Chloride 08 /20 /2024 08/28/2024 8 14 OK
TW4-39 Nitrate+ Nitrite as N 08 /20/2024 08/28/2024 8 28 OK
TW4-40 Chloride 08/20/2024 08/26/2024 6 28 OK
TW4-40 Carbon Tetrachloride 08/20/2024 08/27/2024 7 14 OK
TW4-40 Chloroform 08/20/2024 08/27/2024 7 14 OK
TW4-40 Chloromethane 08 /20 /2024 08/27 /2024 7 14 OK
TW4-40 Methylene Chloride 08 /20 /2024 08 /27 /2024 7 14 OK
TW4-40 Nitrate+ Nitrite as N 08/20/2024 08 /28/2024 8 28 OK
TW4-41 Chloride 08 /20/2024 08/26/2024 6 28 OK
TW4-41 Carbon Tetrachloride 08 /20 /2024 08 /27 /2024 7 14 OK
TW4-41 Chloroform 08 /20 /2024 08/27/2024 7 14 OK
TW4-41 Chloromethane 08 /20/2024 08/27/2024 7 14 OK
TW4-41 Methylene Chloride 08/20/2024 08/27/2024 7 14 OK
TW4-41 Nitrate+ Nitrite as N 08/20/2024 08/28/2024 8 28 OK
1-2: Holding Time Evaluation
Hold Time Allowed Hold Hold Time
Location ID Parameter Name Sample Date Analysis Date (Days) Time (Days) Check
TW4-42 Chloride 09/12/2024 09/16/2024 4 28 OK
TW4-42 Carbon Tetrachloride 09/12/2024 09/20/2024 8 14 OK
TW4-42 Chloroform 09/12/2024 09/20/2024 8 14 OK
TW4-42 Chloromethane 09/12/2024 09/20/2024 8 14 OK
TW4-42 Methylene Chloride 09/12/2024 09/20/2024 8 14 OK
TW4-42 Nitrate+ Nitrite as N 09/12/2024 09/18/2024 6 28 OK
TW4-43 Chloride 09/17/2024 09 /23/2024 6 28 OK
TW4-43 Carbon Tetrachloride 09/17/2024 09/25/2024 8 14 OK
TW4-43 Chloroform 09/17/2024 09 /25/2024 8 14 OK
TW4-43 Chloromethane 09/17/2024 09 /25 /2024 8 14 OK
TW4-43 Methylene Chloride 09/17 /2024 09/25/2024 8 14 OK
TW4-43 Nitrate+ Nitrite as N 09/17/2024 09/26/2024 9 28 OK
TW4-60 Chloride 08/20/2024 08/27/2024 7 28 OK
TW4-60 Carbon Tetrachloride 08/20/2024 08/29/2024 9 14 OK
TW4-60 Chloroform 08/20/2024 08/29/2024 9 14 OK
TW4-60 Chloromethane 08 /20 /2024 08 /29 /2024 9 14 OK
TW4-60 Methylene Chloride 08/20/2024 08 /29/2024 9 14 OK
TW4-60 Nitrate+ Nitrite as N 08/20/2024 08/28/2024 8 28 OK
TW4-65 Chloride 09 /12/2024 09/17/2024 5 28 OK
TW4-65 Carbon Tetrachloride 09/12/2024 09 /20 /2024 8 14 OK
TW4-65 Chloroform 09/12 /2024 09/20/2024 8 14 OK
TW4-65 Chloromethane 09/12/2024 09/20/2024 8 14 OK
TW4-65 Methylene Chloride 09/12/2024 09/20/2024 8 14 OK
TW4-65 Nitrate+ Nitrite as N 09/12/2024 09/18/2024 6 28 OK
TW4-70 Chloride 09/17/2024 09/24/2024 7 28 OK
TW4-70 Carbon Tetrachloride 09 /17/2024 09/27/2024 10 14 OK
TW4-70 Chloroform 09/17/2024 09 /27 /2024 10 14 OK
TW4-70 Chloromethane 09/17/2024 09/27/2024 10 14 OK
TW4-70 Methylene Chloride 09 /17/2024 09/27/2024 10 14 OK
TW4-70 Nitrate+ Nitrite as N 09/17 /2024 09/26/2024 9 28 OK
TW4-75 Chloride 09/18 /2024 09 /24/2024 6 28 OK
TW4-75 Carbon Tetrachloride 09/18 /2024 09/26/2024 8 14 OK
TW4-75 Chloroform 09/18/2024 09/26/2024 8 14 OK
TW4-75 Chloromethane 09/18/2024 09/26/2024 8 14 OK
TW4-75 Methylene Chloride 09/18/2024 09/26/2024 8 14 OK
TW4-75 Nitrate+ Nitrite as N 09 /18/2024 09/26/2024 8 28 OK
Table 1-3 Recipt Temperature Check
Sample Batch Wells in Batch Temperature
24H2049 MW-04, TW4-0l, TW4-02, TW4-04, TW4-l l, MW-26, TW4-19, TW4-21, TW4 -OSC 22, TW4-24, TW4-25, TW4-37, TW4-39, TW4-40, TW4-41, TW4-60, Trip Blank
2411050 TW4-03, TW4-12, TW4-12R, TW4-13, TW4-14, TW4-28, TW4-31, TW4-32, o.o·c
TW4-13, TW4-36, TW4-42, TW4-65, Trip Blank
MW-32, TW4-05, TW4-06, TW4-07, TW4-08, TW4-09, TW4-10, TW4-16, MW-
2411623 32, TW4-18, TW4-23, TW4-26, TW4-27, TW4-29, TW4-30, TW4-30R, TW4-o.6·c
33, TW4-34, TW4-35, TW4-38, TW4-43, TW4-70, TW4-75, Trip Blank
1-4 Analytical Method Check
Parameter Method Method Used by Lab
SW8260B,
Carbon Tetrachloride SW8260C or SW8260D
SW8260D
A4500-Cl B or
Chloride A4500-Cl E or E300.0
E300.0
SW8260B,
Chloroform SW8260C or SW8260D
SW8260D
SW8260B,
Chloromethane SW8260C or SW8260D
SW8260D
SW8260B,
Methylene Chloride SW8260C or SW8260D
SW8260D
Nitrogen E353 . l or E353 .2 E353.2
All parameters were analyzed using the reporting method specificied in the QAP
1-5 Reporting Limit Check
Lab
Reporting Dilution Required
Location Analyte Limit Units Qualifier Factor Reporting Limit RLCheck
Trip Blank Carbon Tetrachloride 1.0 ug/L u 1 1 OK
Trip Blank Chloroform 1.0 ug/L u 1 1 OK
Trip Blank Chloromethane 1.0 ug/L u 1 1 OK
Trip Blank Methylene Chloride 1.0 ug/L u 1 1 OK
Trip Blank Carbon Tetrachloride 1.0 ug/L u 1 1 OK
Trip Blank Chloroform 1.0 ug/L u 1 1 OK
Trip Blank Chloromethane 1.0 ug/L u 1 1 OK
Trip Blank Methylene Chloride 1.0 ug/L u 1 1 OK
Trip Blank Carbon Tetrachloride 1.0 ug/L u l l OK
Trip Blank Chloroform 1.0 ug/L u l 1 OK
Trip Blank Chloromethane 1.0 ug/L u l 1 OK
Trip Blank Methylene Chloride 1.0 ug/L u 1 1 OK
MW-04 Chloride 10.00 mg/L 10 1 OK
MW-04 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
MW-04 Chloroform 25 ug/L 25 1 OK
MW-04 Chloromethane 1.0 ug/L u 1 1 OK
MW-04 Methylene Chloride 1.0 ug/L u 1 1 OK
MW-04 Nitrate+ Nitrite as N 0.100 mg/L 1 0.1 OK
TW4-01 Chloride 10.00 mg/L 10 1 OK
TW4-01 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-01 Chloroform 25.0 ug/L 25 1 OK
TW4-01 Chloromethane 1.0 ug/L u l 1 OK
TW4-01 Methylene Chloride 1.0 ug/L u l 1 OK
TW4-01 Nitrate+ Nitrite as N 0.100 mg/L 1 0.1 OK
TW4-02 Chloride 10.00 mg/L 10 1 OK
TW4-02 Carbon Tetrachloride 1.0 ug/L u 1 l OK
TW4-02 Chloroform 25.0 ug/L 25 l OK
TW4-02 Chloromethane 1.0 ug/L u 1 1 OK
TW4-02 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-02 Nitrate + Nitrite as N 0.100 mg/L 1 0.1 OK
TW4-03 Chloride 1.00 mg/L 1 1 OK
TW4-03 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-03 Chloroform 1.0 ug/L u 1 1 OK
TW4-03 Chloromethane 1.0 ug/L u 1 1 OK
TW4-03 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-03 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-04 Chloride 10.00 mg/L 10 1 OK
TW4-04 Carbon Tetrachloride 1.0 ug/L u l l OK
TW4-04 Chloroform 25 ug/L 25 1 OK
TW4-04 Chloromethane 1.0 ug/L u l 1 OK
TW4-04 Methylene Chloride 1.0 ug/L u l 1 OK
TW4-04 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-05 Chloride 1.00 mg/L l 1 OK
TW4-05 Carbon Tetrachloride 1.0 ug/L u l 1 OK
TW4-05 Chloroform 1.0 ug/L l 1 OK
TW4-05 Chloromethane 1.0 ug/L u 1 1 OK
TW4-05 Methylene Chloride 1.0 ug/L u 1 l OK
TW4-05 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-06 Chloride 1.00 mg/L 1 1 OK
TW4-06 Carbon Tetrachloride 1.0 ug/L u 1 l OK
1-5 Reportin g Limit Check
Lab
Reporting Dilution Required
Location Analyte Limit Units Qualifier Factor Reporting Limit RLCheck
TW4-06 Chloroform 1.0 ug/L 1 1 OK
TW4-06 Chloromethane 1.0 ug/L u 1 1 OK
TW4-06 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-06 Nitrate+ Nitrite as N 0.100 mg/L 1 0.1 OK
TW4-07 Chloride 1.00 mg/L 1 1 OK
TW4-07 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-07 Chloroform 25.0 ug/L 25 1 OK
TW4-07 Chloromethane 1.0 ug/L 1 1 OK
TW4-07 Methylene Chloride 1.0 ug/L u I 1 OK
TW4-07 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-08 Chloride 1.00 mg/L 1 1 OK
TW4-08 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-08 Chloroform 1.0 ug/L 1 1 OK
TW4-08 Chloromethane 1.0 ug/L u 1 1 OK
TW4-08 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-08 Nitrate+ Nitrite as N 0 .200 mg/L 2 0.1 OK
TW4-09 Chloride 1.00 mg/L 1 I OK
TW4-09 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-09 Chloroform 1.0 ug/L 1 1 OK
TW4-09 Chloromethane 1.0 ug/L u 1 1 OK
TW4-09 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-09 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-10 Chloride 1.00 mg/L 1 1 OK
TW4-10 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-10 Chloroform 10 .0 ug/L 10 1 OK
TW4-10 Chloromethane 1.0 ug/L 1 1 OK
TW4-10 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-10 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-l 1 Chloride 10.00 mg/L 10 1 OK
TW4-11 Carbon Tetrachloride 1.0 ug/L 1 1 OK
TW4-11 Chloroform 100 ug/L 100 1 OK
TW4-11 Chloromethane 1.0 ug/L u 1 l OK
TW4-11 Methylene Chloride 1.0 ug/L u 1 l OK
TW4-11 Nitrate+ Nitrite as N 0 .500 mg/L 5 0.1 OK
TW4-12 Chloride 1.00 mg/L 1 1 OK
TW4-12 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-12 Chloroform 1.0 ug/L u 1 1 OK
TW4-12 Chloromethane 1.0 ug/L u 1 1 OK
TW4-12 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-12 Nitrate+ Nitrite as N 0.500 mg/L 5 1 OK
TW4-12R Chloride 1.00 mg/L u 1 1 OK
TW4-12R Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-12R Chloroform 1.0 ug/L 1 1 OK
TW4-12R Chloromethane 1.0 ug/L u 1 0.1 OK
TW4-12R Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-12R Nitrate+ Nitrite as N 0.100 mg/L u 1 0.1 OK
1-5 Reporting Limit Check
Lab
Reporting Dilution Required
Location Analyte Limit Units Qualifier Factor Reporting Limit RLCheck
TW4-13 Chloride 1.00 mg/L l I OK
TW4-13 Carbon Tetrachloride 1.0 ug/L u I 1 OK
TW4-13 Chloroform 1.0 ug/L u 1 1 OK
TW4-13 Chloromethane 1.0 ug/L u l 1 OK
TW4-13 Methylene Chloride 1.0 ug/L u l I OK
TW4-13 Nitrate+ Nitrite as N 0.100 mg/L 1 0.1 OK
TW4-14 Chloride 1.00 mg/L l 1 OK
TW4-14 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-14 Chloroform I ug/L u I 1 OK
TW4-14 Chloromethane 1.0 ug/L u 1 1 OK
TW4-14 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-14 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
MW-26 Chloride 10.00 mg/L 10 1 OK
MW-26 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
MW-26 Chloroform 50.0 ug/L 50 1 OK
MW-26 Chloromethane 1.0 ug/L u l 1 OK
MW-26 Methylene Chloride 1.0 ug/L u l 1 OK
MW-26 Nitrate+ Nitrite as N 0.100 mg/L 1 0.1 OK
TW4-16 Chloride 1.00 mg/L 1 1 OK
TW4-16 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-16 Chloroform 1.0 ug/L 1 l OK
TW4-16 Chloromethane 1.0 ug/L u l l OK
TW4-16 Methylene Chloride 1.0 ug/L u l l OK
TW4-16 Nitrate+ Nitrite as N 0.200 mg/L 2 1 OK
MW-32 Chloride 1.00 mg/L 1 1 OK
MW-32 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
MW-32 Chloroform 1.0 ug/L u 1 1 OK
MW-32 Chloromethane 1.0 ug/L u 1 0.1 OK
MW-32 Methylene Chloride 1.0 ug/L u 1 1 OK
MW-32 Nitrate+ Nitrite as N 0.100 mg/L u 1 0.1 OK
TW4-18 Chloride 1.00 mg/L 1 1 OK
TW4-18 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-18 Chloroform 1 ug/L 1 1 OK
TW4-l8 Chloromethane 1.0 ug/L u 1 1 OK
TW4-18 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-18 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-19 Chloride 10.0 mg/L 10 1 OK
TW4-19 Carbon Tetrachloride 1.0 ug/L 1 1 OK
TW4-19 Chloroform 25.0 ug/L 25 ' 1 OK
TW4-19 Chloromethane 1.0 ug/L u l l OK
TW4-19 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-19 Nitrate+ Nitrite as N 0.100 mg/L l 0.1 OK
TW4-21 Chloride 10.0 mg/L 10 1 OK
TW4-21 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-21 Chloroform 25 ug/L 25 1 OK
TW4-21 Chloromethane 1.0 ug/L u 1 1 OK
I-5 Reporting Limit Check
Lab
Reporting Dilution Required
Location Analyte Limit Units Qualifier Factor Reporting Limit RL Check
TW4-21 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-21 Nitrate + Nitrite as N 0.50 mg/L 5 0.1 OK
TW4-22 Chloride 10.00 mg/L 10 1 OK
TW4-22 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-22 Chloroform 100 .0 ug/L 100 1 OK
TW4-22 Chloromethane 1.0 ug/L u 1 I OK
TW4-22 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-22 Nitrate + Nitrite as N 2.400 mg/L 24 0.1 OK
TW4-23 Chloride 1.0 mg/L 1 I OK
TW4-23 Carbon Tetrachloride 1.0 ug/L u 1 I OK
TW4-23 Chloroform 1.0 ug/L u 1 I OK
TW4-23 Chloromethane 1.0 ug/L u I I OK
TW4-23 Methylene Chloride 1.0 ug/L u l 1 OK
TW4-23 Nitrate+ Nitrite as N 0.10 mg/L 1 0 .1 OK
TW4-24 Chloride 10.00 mg/L 10 1 OK
TW4-24 Carbon Tetrachloride 1.0 ug/L u I I OK
TW4-24 Chloroform 1.0 ug/L 1 1 OK
TW4-24 Chloromethane 1.0 ug/L u I 1 OK
TW4-24 Methylene Chloride 1.0 ug/L u 1 I OK
TW4-24 Nitrate+ Nitrite as N 0.500 mg/L 5 0.1 OK
TW4-25 Chloride 1.00 mg/L 1 1 OK
TW4-25 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-25 Chloroform 1.0 ug/L u 1 I OK
TW4-25 Chloromethane 1.0 ug/L u I 1 OK
TW4-25 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-25 Nitrate+ Nitrite as N 0.100 mg/L 1 0.1 OK
TW4-26 Chloride 1.00 mg/L 1 1 OK
TW4-26 Carbon Tetrachloride 1.0 ug/L u 1 I OK
TW4-26 Chloroform 25.0 ug/L 25 l OK
TW4-26 Chloromethane 1.0 ug/L 1 I OK
TW4-26 Methylene Chloride 1.0 ug/L u 1 I OK
TW4-26 Nitrate+ Nitrite as N 0.500 mg/L 5 0.1 OK
TW4-27 Chloride 1.00 mg/L I 1 OK
TW4-27 Carbon Tetrachloride 1.0 ug/L u 1 I OK
TW4-27 Chloroform 1.0 ug/L I 1 OK
TW4-27 Chloromethane 1.0 ug/L u 1 I OK
TW4-27 Methylene Chloride 1.0 ug/L u I I OK
TW4-27 Nitrate + Nitrite as N 0.500 mg/L 5 0.1 OK
TW4-28 Chloride 1.00 mg/L I I OK
TW4-28 Carbon Tetrachloride 1.0 ug/L u I I OK
TW4-28 Chloroform 1.0 ug/L u 1 I OK
TW4-28 Chloromethane 1.0 ug/L u 1 1 OK
TW4-28 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-28 Nitrate+ Nitrite as N 0.500 mg/L 5 0.1 OK
TW4-29 Chloride 1.00 mg/L I l OK
TW4-29 Carbon Tetrachloride 1.0 ug/L u I 1 OK
I-5 Reporting Limit Check
Lab
Reporting Dilution Required
Location Ana)yte Limit Units Qualifier Factor Reporting Limit RL Check
TW4-29 Chloroform 25.0 ug/L 25 l OK
TW4-29 Chloromethane 1.0 ug/L l l OK
TW4-29 Methylene Chloride 1.0 ug/L u l I OK
TW4-29 Nitrate + Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-30 Chloride 1.000 mg/L l l OK
TW4-30 Carbon Tetrachloride l.000 ug/L u l l OK
TW4-30 Chloroform 1.000 ug/L 1 l OK
TW4-30 Chloromethane l.000 ug/L u 1 1 OK
TW4-30 Methylene Chloride 1.000 ug/L u 1 1 OK
TW4-30 Nitrate + Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-30R Chloride 1.00 mg/L u l 1 OK
TW4-30R Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-30R Chloroform 1.0 ug/L 1 l OK
TW4-30R Chloromethane 1.0 ug/L u 1 1 OK
TW4-30R Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-30R Nitrate+ Nitrite as N 0.100 mg/L u 1 0.1 OK
TW4-31 Chloride 1.00 mg/L 1 1 OK
TW4-31 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-31 Chloroform 1.0 ug/L u l l OK
TW4-31 Chloromethane 1.0 ug/L u l l OK
TW4-31 Methylene Chloride 1.0 ug/L u 1 1 OK
TW4-31 Nitrate+ Nitrite as N 0.100 mg/L l 0.1 OK
TW4-32 Chloride 1.00 mg/L l l OK
TW4-32 Carbon Tetrachloride 1.0 ug/L u l l OK
TW4-32 Chloroform 1.0 ug/L u l l OK
TW4-32 Chloromethane 1.0 ug/L u l l OK
TW4-32 Methylene Chloride 1.0 ug/L u l l OK
TW4-32 Nitrate+ Nitrite as N 0.100 mg/L l 0.1 OK
TW4-33 Chloride 1.00 mg/L 1 1 OK
TW4-33 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-33 Chloroform 1.0 ug/L l l OK
TW4-33 Chloromethane 1.0 ug/L u l l OK
TW4-33 Methylene Chloride 1.0 ug/L u l l OK
TW4-33 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-34 Chloride 1.00 mg/L l 1 OK
TW4-34 Carbon Tetrachloride 1.0 ug/L u l l OK
TW4-34 Chloroform 1.0 ug/L u 1 l OK
TW4-34 Chloromethane 1.0 ug/L u 1 l OK
TW4-34 Methylene Chloride 1.0 ug/L u l 1 OK
TW4-34 Nitrate+ Nitrite as N 0.100 mg/L l 0.1 OK
TW4-35 Chloride 1.00 mg/L -1 1 OK
TW4-35 Carbon Tetrachloride 1.0 ug/L u 1 l OK
TW4-35 Chloroform 1.0 ug/L 1 1 OK
TW4-35 Chloromethane 1.0 ug/L u l 1 OK
TW4-35 Methylene Chloride 1.0 ug/L u l l OK
TW4-35 Nitrate+ Nitrite as N 0.100 mg/L l 0.1 OK
I-5 Report ing Limit Check
Lab
Reporting Dilution Required
Location Analyte Limit Units Qualifier Factor Reporting Limit RL Check
TW4-36 Chloride 1.000 mg/L 1 1 OK
TW4-36 Carbon Tetrachloride 1.000 ug/L u I 1 OK
TW4-36 Chloroform 1.000 ug/L u 1 1 OK
TW4-36 Chloromethane 1.000 ug/L u I I OK
TW4-36 Methylene Chloride 1.000 ug/L u 1 l OK
TW4-36 Nitrate+ Nitrite as N 0.100 mg/L l 0 .1 OK
TW4-37 Chloride 10.0 mg/L 10 1 OK
TW4-37 Carbon Tetrachloride 1.0 ug/L 1 1 OK
TW4-37 Chloroform 250 ug/L 250 1 OK
TW4-37 Chloromethane 1.0 ug/L I l OK
TW4-37 Methylene Chloride 1.0 ug/L u I 1 OK
TW4-37 Nitrate+ Nitrite as N 2.40 mg/L 24 0.1 OK
TW4-38 Chloride 1.00 mg/L 1 I OK
TW4-38 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-38 Chloroform 1.0 ug/L u l 1 OK
TW4-38 Chloromethane 1.0 ug/L u 1 I OK
TW4-38 Methylene Chloride 1.0 ug/L u I l OK
TW4-38 Nitrate+ Nitrite as N 0.500 mg/L 5 0.1 OK
TW4-39 Chloride 10 .00 mg/L 10 I OK
TW4-39 Carbon Tetrachloride 1.0 ug/L u 1 1 OK
TW4-39 Chloroform 50 ug/L 50 1 OK
TW4-39 Chloromethane 1.0 ug/L u l 1 OK
TW4-39 Methylene Chloride 1.0 ug/L u l I OK
TW4-39 Nitrate+ Nitrite as N 0.500 mg/L 5 0.1 OK
TW4-40 Chloride 10 .00 mg/L 10 1 OK
TW4-40 Carbon Tetrachloride 1.0 ug/L u 1 I OK
TW4-40 Chloroform 10.0 ug/L 10 I OK
TW4-40 Chloromethane 1.0 ug/L u 1 I OK
TW4-40 Methylen e Chloride 1.0 ug/L u I I OK
TW4-40 Nitrate+ Nitrite as N 0.100 mg/L I 0.1 OK
TW4-41 Chloride 10.00 mg/L 10 I OK
TW4-41 Carbon Tetrachloride 1.0 ug/L u I I OK
TW4-41 Chloroform 25 ug/L 25 I OK
TW4-41 Chloromethane 1.0 ug/L u I 1 OK
TW4-4l Methylene Chloride 1.0 ug/L u I 1 OK
TW4-41 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-42 Chloride 1.00 mg/L I 1 OK
TW4-42 Carbon Tetrachloride 1.0 ug/L u l I OK
TW4-42 Chloroform 1.0 ug/L u I I OK
TW4-42 Chloromethane 1.0 ug/L u I 1 OK
TW4-42 Methylene Chloride 1.0 ug/L u I I OK
TW4-42 Nitrate+ Nitrite as N 0.100 mg/L 1 0.1 OK
TW4-43 Chloride 1.00 mg/L I I OK
TW4-43 Carbon Tetrachloride 1.0 ug/L u 1 I OK
TW4-43 Chloroform 1.0 ug/L u 1 1 OK
TW4-43 Chloromethane 1.0 ug/L u 1 1 OK
1-5 Rep orting Limit Check
La b
Reporting Dilution Required
Location AnaJvte Limit Units Qualifier Factor Reportin g Limit RLCheck
TW4-43 Methylene Chloride 1.0 ug/L u I I OK
TW4-43 Nitrate+ Nitrite as N 0 .200 mg/L 2 0.1 OK
TW4-60 Chloride 1.00 mg/L u I I OK
TW4-60 Carbon Tetrachloride 1.0 ug/L u I I OK
TW4-60 Chloroform 1.0 ug/L u I I OK
TW4-60 Chloromethane 1.0 ug/L u I I OK
TW4-60 Methylene Chloride 1.0 ug/L u I I OK
TW4-60 Nitrate+ Nitrite as N 0.100 mg/L u I 0.1 OK
TW4-65 Chloride 1.00 mg/L I I OK
TW4-65 Carbon Tetrachloride 1.0 ug/L u I I OK
TW4-65 Chloroform 1.0 ug/L u I I OK
TW4-65 Chloromethane 1.0 ug/L u I 1 OK
TW4-65 Methylene Chloride 1.0 ug,'L u I 1 OK
TW4-65 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-70 Chloride 1.00 mg/L I I OK
TW4-70 Carbon Tetrachloride 1.0 ug/L u I I OK
TW4-70 Chloroform 1.0 ug/L I I OK
TW4-70. Chloromethane 1.0 ug/L u I I OK
TW4-70 Methyl ene Chloride 1.0 ug/L u I I OK
TW4-70 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
TW4-75 Chloride 1.00 mg/L I 1 OK
TW4-75 Carbon Tetrachloride 1.0 ug/L u 1 I OK
TW4-75 Chloroform 1.0 ug/L I I OK
TW4-75 Ch loromethane 1.0 ug/L u I I OK
TW4-75 Methylene Chloride 1.0 ug/L u I I OK
TW4-75 Nitrate+ Nitrite as N 0.200 mg/L 2 0.1 OK
I-7 QA/QC Evaluation for Sample Duplicates
Constituent
Chloride (m g/L)
Nitrate+ Nitrite (as N)
Carbon Tetrachloride
Chloroform
Chlorometbane
Dichloromethane (Methylene Chloride)
Constituent
Chloride (mg/L)
Nitrate+ Nitrite (as N)
Carbon Tetrachloride
Chloroform
Ch loromethane
Dichloromethane (Methylene Chloride)
Constituent
Chloride (m g/L)
Nitrate + Nitrite (as N)
Carbon Tetrachloride
Chlorofonn
Chloromethane
Dichloromethane (Methylene Chloride)
RPD = Relative Percent Difference
ND = The analyte was not detected
TW4-12 TW4-65
47.2 46.5
9.78 6.46
ND ND
ND ND
ND ND
ND ND
TW4-08 TW4-70
52.2 50 .2
0.479 0.567
ND ND
2.6 2.5
ND ND
ND ND
TW4-18 TW4-75
45 .0 44.9
3.71 3.75
ND ND
47.2 49.0
ND ND
ND ND
Highlighted cells indicate an RPD that exceeded the 20% RPO criteria
%RPD
1.5
40.9
NC
NC
NC
NC
%RPD
3.9
16.8
NC
3.9
NC
NC
%RPD
0.2
1.1
NC
3.7
NC
NC
Per the approved QAP, an RPD greater than 20% is acceptable if the reported
.results are less· than 5 times the RL. These results are provided for information
1-8 QC Control Limits for Analysis and Blanks
Method Blank Detections
All Method Blanks (MB) for the quarter were nondetect.
Matrix Spike % Recoveries
MS MSD
Lab Report Lab Sample ID Well Analyte %REC %REC
24H2049 BYH1398-MS1 TW4-22 Chloroform* NC NC
Chloromethane 69.8 73.2
2411050 BYI0745-MS4 TW4-03 Nitrate+ Nitrite 122 103
NC -Not calculated
* -Recovery was not calculated because the analyte in the sample was greater than 4 times the spike amount
NI A = QC was not performed on an EFRI sample.
Laboratory Control Sample
Lab Report Analyte LCS%REC REC Range
24H2049 Carbon Tetrachloride 140 70-130
2411050 Chloromethane 63.6 70-130
2411050 Methylene Chloride 68.8 70-130
Surrogate % Recovery
All Surrogate recoveries were within acceptance limits for the quarter.
REC Range RPD RPDRange
70 -130 NC 20
70-130 4.76 20
90-110 2.36 20
1-9 Rinsate EvaJuatioo
Rinsati ?
Rinsate Result
Sample Parameter (ug/L) Previous Well .Purged
TW4-12R Chloroform 14.2 TW4-12 (ND)
TW4-30R Chloroform 21.6 TW4-08 (2.6)
TabJ
Kriged Current Quarter Chloroform Isoconcentration Map
TabK
Analyte Concentration Data and Chloroform Concentration Trend Graphs over Time
Chloroform Carbon Chloromethane Methylene Nitrate Chloride MW-4 Tetrachloride (ug/1) (ue/1) (ug/1) Chloride (ug/1) (mg/I) (mg/I)
28-Sep-99 6200
28-Sep-99 5820
28-Sep-99 6020
15-Mar-00 5520
15-Mar-00 5430
2-Sep-00 5420 9.63
30-Nov-00 6470 9.37
29-Mar-01 4360 8.77
22-Jun-01 6300 9.02
20-Sep-0l 5300 9.45
8-Nov-01 5200 8
26-Mar-02 4700 8.19
22-May-02 4300 8.21
12-Sep-02 6000 8.45
24-Nov-02 2500 8.1
28-Mar-03 2000 8.3
30-Apr-03 3300 NA
30-May-03 3400 8.2
23-Jun-03 4300 8.2
30-Jul-03 3600 8.1
29-Aug-03 4100 8.4
12-Sep-03 3500 8.5
l 5-Oct-03 3800 8.1
8-Nov-03 3800 8
29-Mar-04 NA NA
22-Jun-04 NA NA
l 7-Sep-04 3300 6.71
l 7-Nov-04 4300 7.5
16-Mar-05 2900 6.3
25-May-05 3170 NA NA NA 7.1 NA
31-Aug-05 3500 <10 <10 <10 7.0 NA
l-Dec-05 3000 <50 <50 <50 7.0 NA
9-Mar-06 3100 <50 <50 50 6 49
14-Jun-06 3000 <50 <50 50 6 49
20-Jul-06 2820 <50 <50 <50 1.2 48
9-Nov-06 2830 2.1 1.4 <1 6.4 50
28-Feb-07 2300 1.6 <1 <I 6.3 47
27-Jun-07 2000 1.8 <l <l 7 45
l 5-Aug-07 2600 1.9 <1 <l 6.2 47
10-Oct-07 2300 1.7 <l <l 6.2 45
26-Mar-08 2400 1.7 <l <l 5.8 42
25-Jun-08 2500 1.6 <l <I 6.09 42
1 0-Sep-08 1800 1.8 <] <I 6.36 35
l 5-Oct-08 2100 1.7 <I <l 5.86 45
Chloroform Carbon Chloromethane Methylene Nitrate Chloride MW-4 Tetrachloride (ug/1) (ue/1) (ug/1) Chloride (ug/1) (mg/I) (mg/I)
4-Mar-09 2200 1.5 <1 <1 5.7 37
23-Jun-09 1800 1.3 <] <l 5.2 34
14-Sep-09 2000 1.4 <l <1 5.3 43
14-Dec-09 1800 1.6 ND ND 5.8 44
17-Feb-10 1600 1.2 ND ND 4 45
14-Jun-l 0 2100 1.2 ND ND 5.1 41
16-Aug-10 1900 1.5 ND ND 4.8 38
11-Oct-l0 1500 1.4 ND ND 4.9 41
23-Feb-l 1 1700 1.5 ND ND 4.6 40
l-Jun-11 1700 1.4 ND ND 4.9 35
17-Aug-11 1700 1.1 ND ND 4.9 41
l 6-Nov-11 1600 1.3 ND ND 5.1 40
23-Jan-12 1500 I ND ND 4.8 41
6-Jun-12 1400 1.2 ND ND 4.9 39
4-Sep-12 1500 1.5 ND ND 5 41
4-Oct-12 1300 1 ND ND 4.8 42
ll-Feb-13 1670 1.49 ND ND 4.78 37.8
5-Jun-13 1490 1.31 ND ND 4.22 44
3-Sep-13 1520 1.13 ND ND 4.89 41.4
29-Oct-13 1410 5.58 ND ND -5.25 40. l
27-Jan-14 1390 4.15 ND ND 4.7 38 .5
l 9-May-14 1390 5.21 ND ND 4.08 39 .9
24-Aug-14 1490 ND 7.6 ND 3.7 41
2 l-Oct-14 1440 ND ND ND 5.07 41.5
9-Mar-15 1400 1.26 ND ND 5.75 40.7
8-Jun-15 1300 ND ND ND 2.53 43.1
3 l-Aug-15 1290 ND ND ND 4.79 44.3
19-Oct-15 1200 ND ND ND 4.43 40.8
9-Mar-16 1240 ND ND ND 5.15 42 .2
23-May-l 6 1580 1.44 ND ND 4.54 43.7
25-Jul-16 1430 ND ND ND 4.95 42.5
12-Oct-16 1470 1.24 ND ND 4.88 44.8
8-Mar-17 1450 1.22 ND ND 4.99 43.3
13-Jun-17 1430 1.15 ND ND 4.88 44.0
26-Jul-17 1400 1.15 ND ND 4.59 43.8
l l-Oct-17 1320 ND ND ND 5.25 43.8
12-Mar-l 8 1320 1.07 ND ND 4.47 46.2
8-Jun-18 1240 ND ND ND 4.64 43.5
22-Aug-18 1300 ND ND ND 4.55 48.5
28-Nov-l 8 1330 ND ND ND 4.44 43.1
8-Mar-19 1190 ND ND ND 5.05 41.5
5-Jun-19 1300 ND ND ND 5.16 40.6
4-Sep-19 1180 ND ND ND 4.69 41.9
11-Dec-l 9 1370 ND ND ND 4.34 45.5
Chloroform Carbon Chloromethaoe Methylene Nitrate Chloride MW-4 Tetrachloride (ug/1) (u,dl) (ug/1) Chloride (ug/1) (mg/I) (mg/I)
l 9-Feb-20 1230 ND ND ND 6.22 48 .1
27-May-20 1250 ND ND ND 5.04 40.7
4-Sep-20 1240 ND ND ND 4.93 43.8
28-Oct-20 1050 ND ND ND 4.62 41.4
23-Feb-21 1150 ND ND ND 4.61 46.5
9-Jun-21 1320 ND ND ND 6.48 34.8
24-Aug-21 1140 ND ND ND 3 .83 43.2
l-Dec-21 1100 ND ND ND 4.9 47 .6
9-Mar-22 1040 ND ND ND 4.8 40 .9
8-Jun-22 1010 ND ND ND 3.9 43.7
30-Aug-22 1200 ND ND ND 4.20 44.7
30-Nov-22 1170 ND ND ND 4.05 35.9
7-Mar-23 1010 ND ND ND 4.44 29.4
13-Jun-23 1050 ND 2.0 ND 4.20 37.0
9-Aug-23 1030 ND ND ND 3.90 44 .7
29-Nov-23 1690 ND 2.5 1.4 6.99 42 .3
2 l-Feb-24 950 ND ND ND 4.51 43.1
29-May-24 1660 ND ND ND 4.12 45.4
20-Aug-24 1160 ND ND ND 4.49 37.5
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-1 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ug/1) (ug/1)
28-Jun-99 1700 7.2
1 0-Nov-99 5 .8
15-Mar-00 1100
10-Apr-00 1490
6-Jun-00 1530
2-Sep-00 2320 5.58
30-Nov-00 3440 7.79
29-Mar-01 2340 7.15
22-Jun-01 6000 8.81
20-Sep-01 12 .8
8-Nov-01 3200 12.4
26-Mar-02 3200 13.1
22-May-02 2800 12 .7
12-Sep-02 3300 12 .8
24-Nov-02 3500 13.6
28-Mar-03 3000 12.4
23-Jun-03 3600 12.5
12-Sep-03 2700 12.5
8-Nov-03 3400 11.8
29-Mar-04 3200 11
22-Jun-04 3100 8.78
17-Sep-04 2800 10.8
17-Nov-04 3000 11.1
16-Mar-05 2700 9.1
25-May-05 3080 NA NA NA 10.6 NA
31-Aug-05 2900 <10 <10 <10 9.8 NA
1-Dec-05 2400 <50 <50 <50 9.7 NA
9-Mar-06 2700 <50 <50 <50 9.4 49
14-Jun-06 2200 <50 <50 <50 9 .8 4 8
20-Jul-06 2840 <50 <50 <50 9.7 51
8-Nov-06 2260 1.4 <1 <l 9.4 47
28-Feb-07 1900 1.2 <l <1 8.9 47
27-Jun-07 1900 1.4 <1 <1 9 45
15-Aug-07 2300 1.3 <l <l 8.4 43
1 0-Oct-07 2000 1.3 <1 <1 7 .8 43
26-Mar-08 2000 1.3 <l <l 7.6 39
25-Jun-08 1900 I.I <1 <1 8.68 39
1 0-Sep-08 1700 1.3 <I <l 8.15 35
15-Oct-08 1700 1.3 <l <1 9.3 41
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-1 (ug/1) Tetrachloride (ug/1)
Chloride (mg/I) (mg/I) (ug/1) (ug/1)
l l-Mar-09 1700 1.1 <l <1 7.5 37
24-Jun-09 1500 $ 1 <l <l 6.9 37
15-Sep-09 1700 <l <l <l 7.3 36
29-Dec-09 1400 <l <l <1 6.8 41
3-Mar-10 1300 <1 <l <l 7.1 35
15-Jun-10 1600 1.2 <l <l 6.8 40
24-Aug-10 1500 <1 <l <l 6.8 35
14-Oct-l 0 1500 <l <1 <l 6.6 40
24-Feb-l 1 1300 ND ND ND 6.6 41
l-Jun-11 1200 ND ND ND 7 35
18-Aug-l l 1300 ND ND ND 6.8 36
29-Nov-l l 1300 ND ND ND 6.6 37
l 9-Jan-12 1300 ND ND ND 6.8 38
14-Jun-12 1000 ND ND ND 7.1 42
l 3-Sep-12 1000 ND ND ND 5 39
4-Oct-12 1100 ND ND ND 6.5 40
13-Feb-13 1320 3.66 ND ND 6.99 37.6
19-Jun-l 3 1100 ND ND ND 6.87 39.1
l 2-Sep-13 1150 ND ND ND 7.12 37.6
14-Nov-13 1280 ND ND ND 7.08 36.5
5-Feb-14 1090 5.47 ND ND 7.74 38.9
23-May-14 1020 4.77 ND ND 6.93 37.4
27-Aug-14 845 ND 1.4 ND 4.8 38
29-Oct-l 4 1140 ND ND ND 6.31 38.7
9-Mar-15 1130 ND ND ND 7.06 38.3
8-Jun-15 1260 ND ND ND 6.07 40.3
31-Aug-l 5 1060 ND ND ND 6.28 45.9
19-Oct-15 1040 ND ND ND 1.55 38.5
9-Mar-16 974 ND ND ND 0.148 41.7
23-May-l 6 1140 ND ND ND 0.138 44.4
25-Jul-16 1160 ND ND ND 5.49 44.7
13-Oct-16 1330 ND ND ND 0.746 44.2
8-Mar-17 519 ND ND ND 4.44 41.5
13-Jun-17 977 ND ND ND 5.74 41.8
26-Jul-17 958 ND ND ND 5.04 42.8
1 l-Oct-17 556 ND ND ND 5.78 38.5
12-Mar-l 8 70.4 ND ND ND 4.84 45.8
8-Jun-18 942 ND ND ND 4.38 42.0
22-Aug-18 1010 ND ND ND 4.30 47.3
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-l (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ug/1) (ug/1)
22-Oct-l 8 752 ND ND ND 4.57 43.2
8-Mar-19 87.2 ND ND ND 4.51 40.9
5-Jun-19 1040 ND ND ND 1.43 44.8
4-Sep-19 894 ND ND ND 1.65 46.0
l 0-Dec-19 1070 ND ND ND 3.91 44.2
l 9-Feb-20 1190 ND ND ND 4.67 47.5
27-May-20 499 ND ND ND 0.443 46.4
4-Sep-20 1060 ND ND ND 2.22 43.7
28-Oct-20 924 ND ND ND 4.30 41.9
23-Feb-2 l 948 ND ND ND 27.2 45.4
9-Jun-21 957 ND ND ND 0.728 37.2
24-Aug-2 l 821 ND l. 18 ND 1.38 44.5
l-Dec-21 957 ND ND ND 4.37 45.5
9-Mar-22 946 ND ND ND 3.9 42.6
8-Jun-22 914 ND ND ND 0.18 45.5
30-Aug-22 954 ND ND ND 0.420 45.1
30-Nov-22 1010 ND ND ND 3.62 38.2
7-Mar-23 928 ND ND ND 1.71 43.8
13-Jun-23 830 ND 1.1 ND 3.87 42.5
9-Aug-23 891 ND 1.1 ND 3.83 44.6
29-Nov-23 1360 ND 2 1.7 3.91 43.4
21-Feb-24 832 ND ND ND 4.07 41.6
29-May-24 1400 ND ND ND 3.76 44.5
20-Aug-24 995 ND ND ND 3.84 39.3
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-2 (og/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(owl) (owl)
10-Nov-99 2510
2-Sep-00 5220
28-Nov-00 4220 10 .7
29-Mar-0l 3890 10.2
22-Jun-01 5500 9 .67
20-Sep-01 4900 11.4
8-Nov-01 5300 10.1
26-Mar-02 5100 9.98
23-May-02 4700 9.78
12-Sep-02 6000 9.44
24-Nov-02 5400 10.4
28-Mar-03 4700 9 .5
23-Jun-03 5100 9 .6
12-Sep-03 3200 8 .6
8-Nov-03 4700 9 .7
29-Mar-04 4200 9.14
22-Jun-04 4300 8.22
l 7-Sep-04 4100 8.4
17-Nov-04 4500 8 .6
16-Mar-05 3700 7.7
25-May-05 3750 8.6
31-Aug-05 3900 <10 <10 <10 8 NA
l-Dec-05 3500 <50 <50 <50 7.8 NA
9-Mar-06 3800 <50 <50 <50 7.5 56
14-Jun-06 3200 <50 <50 <50 7.1 56
20-Jul-06 4120 <50 <50 <50 7.4 54
8-Nov-06 3420 2.3 <1 <l 7.6 55
28-Feb-07 2900 1.8 <l <l 7.3 54
27-Jun-07 3000 2.5 <1 <l 7.8 50
15-Aug-07 340 2.2 <l <l 7.3 49
1 0-Oct-07 3200 2.1 <l <1 6.9 51
26-Mar-08 3300 2.3 <l <l 6 .9 48
25-Jun-08 3100 2.2 <1 <l 7.44 46
10-Sep-08 2800 2.4 <l <l 7.1 42
15-Oct-08 3200 2.4 <2 <2 7.99 47
1 l-Mar-09 3100 2.2 <1 <l 6.5 46
24-Jun-09 2800 2 <l <l 6.4 44
15-Sep-09 3000 2 <l <l 6.6 43
29-Dec-09 1600 2 <l <l 6.4 46
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-2 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u2').) (uwl)
3-Mar-10 2600 2 <l <l 6.8 42
15-Jun-10 3300 2.6 <l <l 6.7 43
16-Aug-10 3300 2.5 <l <l 6.6 43
14-Oct-10 3000 2.1 <l <l 6.5 41
24-Feb-l l 3100 2.4 ND ND 7 46
2-Jun-11 3000 2.2 ND ND 6.8 42
17-Aug-11 2400 1.6 ND ND 6 48
29-Nov-11 3900 2.8 ND ND 7 49
24-Jan-12 2500 2 ND ND 7.1 49
14-Jun-12 2500 2.1 ND ND 7.7 52
13-Sep-12 2900 1.8 ND ND 4 76
4-Oct-12 3100 2 ND ND 7.6 49
13-Feb-13 3580 5.17 ND ND 8.1 46
l 9-Jun-13 3110 2.65 ND ND 7.51 46.9
12-Sep-13 3480 2.41 ND ND 9.3 44.9
14-Nov-13 3740 3.15 ND ND 8.39 43.9
6-Feb-14 3180 7.1 ND ND 7.87 45.9
23-May-14 2930 6.05 ND ND 9.11 45.4
27-Aug-14 3170 1.4 3.6 ND 6.2 45
30-Oct-14 3580 2.6 ND ND 8.45 45.5
9-Mar-15 1840 1.44 ND ND 5.32 44 .9
8-Jun-15 1650 ND ND ND 4.3 48.1
3 l-Aug-15 1310 ND ND ND 3.76 50.0
19-Oct-15 2070 ND ND ND 5.18 41.9
9-Mar-16 1970 1.20 ND ND 5.30 43.4
23-May-16 2070 1.49 ND ND 5.67 43.8
25-Jul-16 1780 ND ND ND 4.07 42.9
12-Oct-16 1600 ND ND ND 6.07 44.3
8-Mar-17 1570 ND ND ND 4 .74 43.1
13-Jun-l 7 1940 ND ND ND 4.90 43.6
26-Jul-l 7 1310 ND ND ND 5.08 43.2
l l-Oct-17 1610 ND ND ND 3.28 43.5
12-Mar-18 764 ND ND ND 2.94 44.4
8-Jun-18 949 ND ND ND 3.50 41.3
22-Aug-18 980 ND ND ND 4.83 44.3
28-Nov-18 822 ND ND ND 3.52 41.7
8-Mar-19 1040 ND ND ND 3.92 40.4
5-Jun-19 1360 ND ND ND 4 .38 39.8
4-Sep-19 797 ND ND ND 4.79 40 .8
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-2 (ug/1) Tetrachloride (ug/1) Chloride (mg/1) (mg/I) (u2'1) (uwl)
10-Dec-19 934 ND ND ND 3.40 41.5
19-Feb-20 1880 ND ND ND 6.07 42.1
27-May-20 1070 ND ND ND 3.62 40.6
4-Sep-20 1260 ND ND ND 3.35 41.3
28-Oct-20 1130 ND ND ND 2.34 "38.7
23-Feb-21 939 ND ND ND 3.30 43.3
9-Jun-21 1160 ND ND ND 3.89 32.5
24-Aug-2I 1150 ND ND ND 1.97 36.8
l-Dec-21 852 ND ND ND 3.49 41.9
9-Mar-22 1020 ND ND ND 3.3 36.7
8-Jun-22 892 ND ND ND 3.1 39.5
30-Aug-22 832 ND ND ND 3.07 40.7
30-Nov-22 1030 ND ND ND 3.74 35.5
7-Mar-23 772 ND ND ND 2.03 41.4
13-Jun-23 788 ND 1.2 ND 3.70 38.1
9-Aug-23 867 ND ND ND 3.23 41.2
29-Nov-23 1200 ND 2.8 ND 2.97 44.5
21-Feb-24 925 ND ND ND 3.62 41.2
29-May-24 1480 ND ND ND 2.84 41.2
20-Aug-24 1030 ND ND ND 3.22 31.3
Chloroform -Carbon Chloromethane Methylene Nitrate Chloride TW4-3 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/1)
(u~/1) (ug/1.)
28-Jun-99 3500 7.6
29-Nov-99 702
15 -Mar-00 834
2-Sep-00 836 1.56
29-Nov -00 836 1.97
27-Mar-01 347 1.85
2 l-Jun-01 390 2 .61
20-Sep-0 l 300 3.06
7-Nov-01 170 3.6
26-Mar-02 11 3.87
21-May-02 204 4.34
12-Sep-02 203 4.32
24-Nov-02 102 4.9
28-Mar-03 0 4 .6
23-Jun-03 0 4 .8
12-Sep-03 0 4 .3
8-Nov-03 0 4 .8
29-Mar-04 0 4.48
22-Jun-04 0 3.6 8
17-Sep-04 0 3 .88
17-Nov-04 0 4.1
16-Mar-05 0 3.5
25-May-05 <l NA N A NA 3.7 NA
3 l-Aug-05 <l <l 6.4 <l 3.5 NA
l-Dec-05 <l <I 2.3 <l 3 .3 NA
9-Mar-06 <I <l 2 .2 <l 3.3 26
14-Jun-06 <1 <I <l <l 3.2 26
20-Jul-06 <1 <1 1.6 <l 2.9 26
8-Nov-06 <l <1 <l <1 1.5 23
28-Feb-07 <l <l <1 <1 3. 1 22
27-Jun-07 <l <l <1 <1 3.3 23
15-Aug-07 <l <l <l <l 3.1 24
10-Oct-07 <1 <l <I <l 2.8 27
26-Mar-08 <l <l <l <I 2.8 21
25-Jun-08 <l <l <l <I 2.85 19
10-Sep-08 <l <l <l <I 2 .66 19
15-0ct-08 <l <l <l <I 2 .6 3 22
4 -Mar-09 <1 <l <l <I 2.5 2 1
24-Jun-09 <l <l <l <l 2 .9 20
15-Sep-09 <1 <l <l <1 2.8 21
16-Dec-09 <l <l <l <l 2.5 22
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-3 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(u2fl) (ue/1)
23-Feb-10 <1 <1 <l <1 2 .8 23
8-Jun-l 0 <1 <1 <l <1 3 24
10-Aug-10 <l <1 <l <I 3 .1 22
5-Oct-l 0 <I <1 <l <I 3 .3 26
15-Feb-ll ND ND ND ND 3 .5 23
25-May-l I ND ND ND ND 3 .7 23
16-Aug-l 1 ND ND ND ND 4 23
15-Nov-l 1 ND ND ND ND 4.4 23
17-Jan-12 ND ND ND ND 4.3 21
3 1-May-12 ND ND ND ND 4.4 24
29-Aug-12 ND ND ND ND 4.9 25
3-Oct-12 ND ND ND ND 4.8 25
7-Feb-13 ND ND ND ND 5 .05 23.7
29-May-13 ND ND ND ND 5.83 23.8
29-Aug-13 ND ND ND ND 6.26 24.0
6-Nov-13 ND ND ND ND 5.89 24.1
22-Jan-14 ND ND ND ND 6.66 24.9
19-May-14 ND ND ND ND 6.01 24.4
13-Aug-14 ND ND ND ND 5.3 26
23-Oct-14 ND ND ND ND 6 .07 26.7
1 l-Mar-15 ND ND ND ND 6 .64 26.2
10-Jun-15 ND ND ND ND 5.7 1 27.5
2-Sep-15 ND ND ND ND 3 .8 8 27.4
21-Oct-15 ND ND ND ND 5.3 7 25.6
15-Mar-16 ND ND ND ND 5 .83 32.8
25-May-16 ND ND ND ND 5.65 27.9
27-Jul-16 ND ND ND ND 6.10 26.5
l 9-Oct-16 ND ND ND ND 6.00 29.5
14-Mar-17 ND ND ND ND 6 .18 28.1
14-Jun-l 7 ND ND ND ND 6 .36 28.7
27-Jul-17 ND ND ND ND 6 .36 28.5
10-Oct-l 7 ND ND ND ND 6 .32 25.9
14-Mar-18 ND ND ND ND 6.46 29.8
12-Jun-18 ND ND ND ND 6.52 26.1
29-Aug-18 ND ND ND ND 5 .53 31.0
30-Nov-18 ND ND ND ND 5 .8 5 27.4
13-Mar-19 ND ND ND ND 5.82 25.5
13-Jun-l 9 ND ND ND ND 6.68 27.4
1 I-Sep-19 ND ND ND ND 5.12 26 .0
12-Dec-19 ND ND ND ND 5.91 28.0
l 7-Mar-20 ND ND ND ND 6 .15 27.7
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-3 (og/1) Tetrachloride (og/1) Chloride (mg/I) (mg/I) (owl) (owl)
10-Jun-20 ND ND ND ND 6.53 26.2
l 7-Sep-20 ND ND ND ND 6.36 25.9
4-Nov-20 ND ND ND ND 6.02 24.9
l 7-Mar-21 ND ND ND ND 6.19 28.4
15-Jun-21 ND ND ND ND 8.04 27.0
15-Sep-21 ND ND ND ND 5.28 20.3
7-Dec-21 ND ND ND ND 5.97 26.2
15-Mar-22 ND ND ND ND 6.1 24.3
15-Jun-22 ND ND ND ND 5.8 26.7
13-Sep-22 ND ND ND ND 5.47 27.3
7-Dec-22 ND ND ND ND 6 .64 21.5
22-Mar-23 ND ND ND ND 6.09 20.6
15-Jun-23 ND ND ND ND 6.38 23.5
9-Aug-23 ND ND ND ND 6.40 26 .9
6-Dec-23 ND ND ND ND 6 .65 18.1
13-Mar-24 ND ND ND ND 6 .64 26.9
4-Jun-24 ND ND ND ND 6.42 26.4
12-Sep-24 ND ND ND ND 6 .93 25.8
Jun-99
Dec-99
Jun-00
Dec-00
Jun-01
Dec-01
Jun-02
Dec-02
Jun-03
Dec-03
Jun-04
Dec-04
Jun-05
Dec-05
Jun-06
Dec-06
Jun-07
Dec-07
Jun-08
Dec-08
Jun-09
Dec-09
Jun-10
Dec-10
Jun-11
Dec-11
Jun-12
Dec-12
Jun-13
Dec-13
Jun-14
Dec-14
Jun-15
Dec-15
Jun-16
Dec-16
Jun-17
Dec-17
Jun-18
Dec-18
Jun-19
Dec-19
Jun-20
Dec-20
Jun-21
Dec-21
Jun-22
Dec-22
Jun-23
Dec-23
Jun-24
Dec-24
0,
0
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Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-4 (ug/l) Tetrachloride (ug/l) Chloride (mg/I) (mg/I)
I (ue/1) (ue/1)
6-Jun-00 0
2-Sep-00 0
28-Nov-00 3.9
28-Mar-01 2260 1.02
20-Jun-0l 3100 14 .5
20-Sep-0l 3200 14
8-Nov-01 2900 14.8
26-Mar-02 3400 15
22-May-02 3200 13.2
12-Sep-02 4000 13.4
24-Nov-02 3800 12.6
28-Mar-03 3300 13.4
23-Jun-03 3600 12.8
12-Sep-03 2900 12.3
8-Nov-03 3500 12.3
29-Mar-04 3200 12.2
22-Jun-04 3500 12.1
I 7-Sep-04 3100 11.1
17-Nov-04 3600 10.8
16-Mar-05 3100 11.6
25-May-05 2400 NA NA NA 11.3 NA
3 l-Aug-05 3200 <10 <10 <10 9 .9 NA
l-Dec-05 2800 <50 <50 <50 10.2 NA
9-Mar-06 2900 <50 <50 <50 9.5 51
14-Jun-06 2600 <50 <50 <50 8.6 48
20-Jul-06 2850 <50 <50 <50 9.7 50
8-Nov-06 2670 1.7 <l <l 10.1 49
28-Feb-07 2200 1.5 <l <1 9 49
27-Jun-07 2400 1.7 <l <1 9.4 47
15-Aug-07 2700 1.5 <1 <l 9 .5 45
10-Oct-07 2500 1.5 <1 <l 9.5 47
26-Mar-08 2800 1.6 <1 <l 9.2 43
25-Jun-08 2500 1.5 <1 <1 10.8 42
10-Sep-08 2200 1.4 <l <l 8.83 39
15-Oct-08 2500 2 <2 <2 10.1 44
4-Mar-09 2200 1.2 <I <1 10.2 37
24-Jun-09 1800 1.2 <l <1 8.2 34
15-Sep-09 2000 1.1 <I <1 8.4 39
29-Dec-09 950 1.1 <I <1 7.6 41
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-4 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) {uw}) {uwl)
17-Feb-10 1700 1 <l <l 6.6 48
1O-Jun-10 2000 1.2 <l <l 7.6 35
16-Aug-10 2100 1.3 <l <I 7.3 36
l l-Oct-10 1700 1.3 <l <I 7.1 38
23-Feb-l l 1800 1.4 ND ND 7 41
l-Jun-1 l 1700 1.2 ND ND 7 35
17-Aug-11 1500 ND ND ND 6.6 40
16-Nov-11 1500 1 ND ND 7 39
23-Jan-12 1200 ND ND ND 7.1 38
6-Jun-12 1500 ND ND ND 7.1 43
4-Sep-12 1600 1.2 ND ND 7.1 39
3-Oct-12 1400 1 ND ND 7 38
l l-Feb-13 1460 1.12 ND ND 7.36 39
5-Jun-13 1330 ND ND ND 6.3 39.6
3-Sep-13 1380 ND ND ND 7.22 38.8
29-Oct-13 1360 5.3 ND ND 7.84 43.9
27-Jan-14 1260 3.88 ND ND 7.28 37.4
19-May-14 1220 5 ND ND 5.91 47.5
l l-Aug-14 1320 ND 7 ND 5.30 40.0
21-Oct-14 1130 ND ND ND 7.02 40.0
9-Mar-15 1350 1 ND ND 7.70 37 .6
8-Jun-15 1280 ND ND ND 6.33 41.3
31-Aug-15 1220 ND ND ND 6.45 45.8
19-Oct-15 1190 ND ND ND 6.27 38.5
9-Mar-16 1190 ND ND ND 6.71 39.7
23-May-16 1780 1 ND ND 6.56 41.9
26-Jul-16 1380 ND ND ND 7.22 40.2
13-Oct-l 6 1430 ND ND ND 6.77 42.3
8-Mar-17 1290 ND ND ND 6.87 41.7
13-Jun-17 1290 ND ND ND 7.06 40 .7
26-Jul-l 7 1290 ND ND ND 6.47 40.5
l l-Oct-17 1290 ND ND ND 6.90 40.7
12-Mar-18 1160 ND ND ND 6.12 42.2
8-Jun-18 1050 ND ND ND 6.34 39.0
22-Aug-18 1030 ND ND ND 6.34 39.0
28-Nov-18 1140 ND ND ND 6.02 41.4
8-Mar-19 1050 ND ND ND 7.26 38.3
5-Jun-19 1070 ND ND ND 10.40 38 .5
4-Sep-19 989 ND ND ND 6.32 39.8
Chloroform Carbon Chlorometbane Methylene Nitrate Chloride TW4-4 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (uwl) (uwl)
1 0-Dec-19 1140 ND ND ND 6.52 40.4
19-Feb-20 1100 ND ND ND 4.58 43.4
27-May-20 1140 ND ND ND 7.26 46.1
4-Sep-20 1110 ND ND ND 7.04 40.0
28-Oct-20 979 ND ND ND 6 .77 38 .6
23-Feb-21 1130 ND ND ND 6 .75 39.8
9-Jun-21 1240 ND ND ND 9.02 39.4
24-Aug-21 1100 ND ND ND 4.00 39.6
1-Dec-21 950 ND ND ND 7.32 42.5
9-Mar-22 1010 ND ND ND 6.6 37.1
8-Jun-22 1110 ND ND ND 6.0 39.9
30-Aug-22 1040 ND ND ND 6 .65 41.0
30-Nov-22 1030 ND ND ND 6 .59 29 .6
7-Mar-23 945 ND ND ND 7.12 30 .2
13-Jun-23 1980 ND 1.9 ND 6.82 39.7
9-Aug-23 1020 ND 1.9 ND 6.08 40.6
29-Nov-23 1530 ND 2.6 2 4.44 42.7
21-Feb-24 996 ND ND ND 7.08 40.6
29-May-24 1620 ND ND ND 6.87 40.5
20-Aug-24 1190 ND ND ND 7.08 35.0
•
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-5 (ug/1) Tetrachloride {ug/1)
Chloride {mg/I) (mg/I)
(owl) (ue/1)
20-Dec-99 29.5
15-Mar-00 49.0
2-Sep-00 124
29-Nov-00 255
28-Mar-0l 236
20-Jun-0l 240
20-Sep-0l 240
7-Nov-01 260
26-Mar-02 260
22-May-02 300
12-Sep-02 330
24-Nov-02 260
28-Mar-03 240
23-Jun-03 290
12-Sep-03 200
8-Nov-03 240
29-Mar-04 210
22-Jun-04 200
l 7-Sep-04 150
l 7-Nov-04 180
16-Mar-05 120
25-May-05 113 NA NA NA 3.70 "NA
3 l-Aug-05 82.0 <2.5 5.8 <2.5 6.00 NA
l-Dec-05 63.0 <2.5 2.5 <2.5 6.00 NA
9-Mar-06 66.0 <2.5 3.1 <2.5 6.00 52
14-Jun-06 51.0 <1 <2.5 <2.5 5.90 51
20-Jul-06 53.7 <1 <1 <1 6.70 54
8-Nov-06 47.1 <1 <1 <1 2.90 55
28-Feb-07 33.0 <l <1 <1 7.80 57
27-Jun-07 26.0 <1 <1 <1 7.00 45
15-Aug-07 9.2 <1 <1 <1 7.70 38
10-Oct-07 9.4 <1 <1 <I 8.20 39
26-Mar-08 11.0 <I <1 <I 7.40 36
25-Jun-08 9.3 <1 <1 <1 8.70 37
10-Sep-08 11.0 <l <l <1 7.91 34
15-Oct-08 10.0 <1 <1 <1 9.30 37
4-Mar-09 12.0 <l <1 <1 7.90 34
24-Jun-09 13.0 <l <l <l 7.50 37
l 5-Sep-09 12.0 <1 <1 <l 8.30 48
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-5 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u2'1) (u2'1)
22-Dec-09 8.5 <l <l <l 7.50 41
25-Feb-10 13.0 <l <l <1 6.80 43
9-Jun-10 12.0 <l <l <1 7.10 28
11-Aug-10 12.0 <1 <1 <1 7.00 38
13-Oct-10 11.0 <1 <1 <1 7.20 41
22-Feb-l 1 10.0 ND ND ND 7.00 34
26-May-ll 9.0 ND ND ND 7.20 35
17-Aug-11 10.0 ND ND ND 7.50 37
7-Dec-11 7.9 ND ND ND 6.00 30
18-Jan-12 7.6 ND ND ND 5.80 22
6-Jun-12 8.4 ND ND ND 8.00 39
l l-Sep-12 12.0 ND ND ND 8.10 37
3-Oct-12 8.0 ND ND ND 7.70 38
13-Feb-13 10.8 ND ND ND 8.24 34.3
13-Jun-13 11.2 ND ND ND 10.70 36.5
5-Sep-13 11.6 ND ND ND 7.79 39.1
13-Nov-13 14.4 ND ND ND 7.75 41.1
30-Jan-14 12.5 ND ND ND 9.16 40.5
22-May-14 13.4 ND ND ND 7.78 51.4
14-Aug-14 12.0 ND ND ND 7.20 44
28-Oct-14 14.6 ND ND ND 8.31 45.1
12-Mar-15 13.8 ND ND ND 9.32 45.1
1 0-Jun-15 13.3 ND 1.07 ND 7.08 47.3
3-Sep-15 12.9 ND ND ND 8.10 52.2
28-Oct-l 5 11.0 ND ND ND 8.03 43.6
17-Mar-16 11.0 ND ND ND 10.20 44.7
26-May-16 13.6 ND ND ND 8.98 45.9
25-Jul-16 10.8 ND ND ND 8.49 44.6
26-Oct-16 10.8 ND ND ND 8.32 47.8
15-Mar-17 12.6 ND ND ND 8.49 44.7
15-Jun-l 7 14.6 ND ND ND 8.52 47.3
2-Aug-17 14.6 ND ND ND 8.52 48.6
10-Oct-l 7 13.8 ND ND ND 8.57 42.5
15-Mar-18 15.2 ND ND ND 8.36 51.2
13-Jun-18 13.9 ND ND ND 9.24 47.4
30-Aug-18 15.4 ND ND ND 7.34 54.7
12-Dec-l 8 15.6 ND ND ND 7.67 49.8
16-Mar-19 14.1 ND ND ND 7.38 47.6
13-Jun-19 15.8 ND ND ND 7.62 49.3
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-5 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ue/l) (ue/l)
l l-Sep-19 14.6 ND ND ND 7.02 46.I
14-Dec-19 15.7 ND ND ND 6.97 53.I
l 7-Mar-20 14.8 ND ND ND 7.10 48.3
l l-Jun-20 15.4 ND ND ND 7.83 49.5
18-Sep-20 14.8 ND ND ND 6.37 47.0
4-Nov-20 15.6 ND ND ND 6.19 50.2
18-Mar-21 12.9 ND ND ND 7.43 46.0
16-Jun-21 13.0 ND ND ND 8.11 50.8
22-Sep-21 11.2 ND ND ND 6.63 39.8
8-Dec-21 12.4 ND ND ND 6.71 51.3
23-Mar-22 11.0 ND ND ND 7.30 47.7
16-Jun-22 10.3 ND ND ND 7.10 40.7
14-Sep-22 13.2 ND ND ND 7.22 45.8
8-Dec-22 7.6 ND ND ND 7.54 51.8
29-Mar-23 8.6 ND ND ND 6.27 51.3
2 l-Jun-23 8.1 ND ND ND 7.13 52.5
14-Sep-23 9.1 ND ND ND 8.83 50.5
7-Dec-23 8.4 ND ND ND 7.66 49.4
21-Feb-24 8.7 ND ND ND 8.02 51.8
13-Jun-24 8.5 ND ND ND 7.38 51.6
18-Sep-24 8.6 ND ND ND 8.08 50.9
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-6 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(uwI) (ull/l)
6-Jun-00 0
2-Sep-00 0
28-Nov-00 0 ND
26-Mar-01 0 0.13
20-Jun-0l 0 ND
20-Sep-01 4 ND
7-Nov-01 1 ND
26-Mar-02 0 ND
21-May-02 0 ND
12-Sep-02 0 ND
24-Nov-02 0 ND
28-Mar-03 0 0.1
23-Jun-03 0 ND
12-Sep-03 0 ND
8-Nov-03 0 ND
29-Mar-04 0 ND
22-Jun-04 0 ND
l 7-Sep-04 0 ND
17-Nov-04 0 ND
16-Mar-05 0 0.2
25-May-05 2.5 NA NA NA 0.4 NA
3 l-Aug-05 10 .0 <l 2.8 <1 0.8 NA
l-Dec-05 17.0 <l 1.3 <1 0.9 NA
9-Mar-06 31.0 <I <l <l 1.2 31
14-Jun-06 19 .0 <I <I <I 1 30
20-Jul-06 11.0 <1 <I <l 0.6 37
8-Nov-06 42 .8 <I <l <l 1.4 65
28-Feb-07 46.0 <I <l <l 1.5 32
27-Jun-07 11.0 <l <l <l 0.6 38
15-Aug-07 18 .0 <I <I <l 0.7 36
10-Oct-07 18.0 <1 <I <l 0.8 38
26-Mar-08 52 .0 <I <1 <I l.l 33
25-Jun-08 24.0 <l <l <1 0.9 35
10-Sep-08 39.0 <l <l <l 1.14 35
15-Oct-08 37.0 <1 <l <l 1.01 33
l l-Mar-09 81.0 <1 <l <[ 2.2 35
24-Jun-09 120 <1 <1 <l 2.7 37
15-Sep-09 280 <1 <l <1 5.0 37
22-Dec-09 250 <1 <l <I 6.1 41
25-Feb-10 1000 <l <l <l 1.6 45
10-Jun-10 590 <l <l <1 2.5 33
12-Aug-10 630 <l <l <l 3.9 31
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-6 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(owl) (uwl)
13-Oct-10 420 <l <l <l 4.3 41
:LJ-reb-11 4/ NU NU NU u. / 40
L.0-May-11 lU NU NU NU U.J L!-L.
l 7-Aug-11 16 ND ND ND 0.3 39
7-Dec-11 21 ND ND ND 0.8 36
18-Jan-12 38 ND ND ND 0.7 38
13-Jun-12 4.7 ND ND ND 0.2 40
11-Sep-12 6.9 ND ND ND 0.1 21
3-Oct-12 9.0 ND ND ND 0.2 41
13-Feb-13 6.9 ND ND ND 0.154 40.4
13-Jun-13 4.9 ND ND ND 0.155 37.9
5-Sep-13 5.9 ND ND ND 0.157 40.6
13-Nov-13 5.5 ND ND ND 1.52 40.2
29-Jan-14 5.7 ND ND ND 0.184 40.6
22-May-14 10.3 ND ND ND 0.312 37
14-Aug-14 202 ND ND ND 4.2 40
24-Sep-14 260 ND ND ND NIA NIA
29-Oct-14 723 ND ND ND 6.92 41.1
18-Mar-15 1180 ND ND ND 5.25 41.2
ll-Jun-15 1040 ND ND ND 5.87 41.6
10-Sep-15 1040 ND ND ND 6.75 47.0
29-Oct-l 5 843 ND ND ND 5.61 40.2
22-Mar-16 834 ND ND ND 6.79 42.0
8-Jun-16 486 ND ND ND 3.19 44.1
4-Aug-16 433 ND ND ND 3.85 42.2
26-Oct-16 301 ND ND ND 3.74 46.l
16-Mar-l 7 288 ND ND ND 3.15 42.1
21-Jun-17 239 ND ND ND 2.42 42.6
3-Aug-17 129 ND ND ND 1.71 42.9
ll-Oct-17 121 ND ND ND 1.71 37.6
20-Mar-18 159 ND ND ND 1.96 43.l
14-Jun-18 74.9 ND ND ND 1.48 40.2
5-Sep-18 53.2 ND ND ND 1.18 44.0
12-Dec-18 37.0 ND ND ND 0.900 20.0
19-Mar-19 23.2 ND ND ND 0.755 41.0
13-Jun-19 15 .8 ND ND ND 0.484 38.1
l l-Sep-19 15 .8 ND ND ND 0.412 39.7
14-Dec-l 9 7.40 ND ND ND 0.244 45.7
17-Mar-20 6.93 ND ND ND 0.222 43.2
l l-Jun-20 4 .86 ND ND ND 0.205 42.4
18-Sep-20 3.63 ND ND ND 0.144 40.5
4-Nov-20 4.61 ND ND ND 0.197 42.9
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-6 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg,1) (ue:/1) (n2'1)
18-Mar-21 3:78 ND ND ND 0.205 41.6
16-Jun-21 2.90 ND ND ND 0.215 43.8
15-Sep-21 3.71 ND ND ND 0.166 34.1
8-Dec-21 3.92 ND ND ND <0.100 44.8
22-Mar-22 3.10 ND ND ND 0.1 31.5
16-Jun-22 2.10 ND ND ND 0.2 43.1
14-Sep-22 3.90 ND ND ND 0.144 38.7
8-Dec-22 1.50 ND ND ND 0.134 40.7
29-Mar-23 1.70 ND ND ND <0.100 43.2
20-Jun-23 2.30 ND ND ND 0.134 44.7
14-Sep-23 2.6 ND ND ND 0.170 44.0
7-Dec-23 1.5 ND ND ND 0.140 42.2
13-Mar-24 1.7 ND ND ND 0.180 44.2
12-Jun-24 2.0 ND ND ND 0.182 39.9
l 7-Sep-24 3.3 ND ND ND 0.169 42.1
0
6-Jun -00
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'
6-Dec-01 r
;
6-Jun-03 .
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6-Dec-04 ; [
6-Jun-06
6-Dec-07
6-Jun-09 -
6-Dec-10 -
6-Jun-12
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6-Dec-13 r
6-Jun-15 -
6-Dec-16
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6-Jun-18 r
6-Dec-19 ,.
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6-Jun-24
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Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-7 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (uwt) (owl)
29-Nov-99 256
15-Mar-0O 616
2-Sep-00 698
29-Nov-O0 684 1.99
28 -Mar-Ol 747 2.46
20-Jun-Ol 1100 2 .65
20-Sep-0l 12 00 3 .38
8-Nov-01 1100 2.5
26-Mar-02 1500 3.76
23-May-02 1600 3.89
12-Sep-02 1500 3.18
24-Nov-02 2300 4 .6
28-Mar-03 1800 4 .8
23-Jun-03 5200 7 .6
12-Sep-03 3600 7.6
8-Nov-03 4500 7 .1
29-Mar-04 2500 4.63
22-Jun-04 2900 4.83
l 7-Sep-04 3100 5.59
l 7-Nov-04 3800 6
16-Mar-0 5 3100 5.2
25 -May-05 2700 NA NA NA 5.4 NA
31-Aug-05 3100 <10 <10 <10 5.2 NA
l-Dec-05 2500 <50 <50 <50 5.3 NA
9-Mar-06 1900 <50 <50 <50 1 48
14-Jun-06 2200 <50 <50 <50 4.5 47
20-Jul-06 2140 <50 <50 <50 4 .7 51
8-Nov-06 2160 1.5 <l <l 4 .6 49
28 -Feb-07 1800 1.1 <I <l 5 47
27-Jun-07 2600 1.5 <l <l 5.1 45
14-Aug-07 2300 1.4 <l <1 4 .7 44
10-Oct-07 1900 1.2 <l <l 4.7 45
26-Mar-08 2200 1.3 <1 <l 4.2 43
25-Jun-08 1800 1.3 <1 <l 4.8 43
10-Sep-08 1600 1.4 <l <l 4.16 35
l 5-Oct-08 1900 <2 <2 <2 4 .01 40
l l -Mar-09 1800 1.2 <l <l 3 .7 3 5
24-Jun-09 1400 <l <l <l 3 .8 37
15-Sep-09 1500 1.0 <l <l 4.1 37
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-7 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u2fl) (u2'l)
29-Dec-09 1300 <1 <1 <1 4.2 37
3-Mar-10 1200 <1 <1 <1 3.8 36
IO-Jun-10 1100 <1 <1 <1 3 .9 31
18-Aug-10 1500 I.I <1 <l 3 .9 36
13-Oct-10 1100 I.I <l <l 4 38
23-Feb-ll 1300 ND ND ND 3.60 45
l-Jun-11 1200 ND ND ND 4.00 35
18-Aug-l I 1200 ND ND ND 4.10 37
29-Nov-l I 1000 ND ND ND 3.80 37
19-Jan-12 1000 ND ND ND 3.90 37
14-Jun-12 790 ND ND ND 4.00 41
13-Sep-12 870 ND ND ND 3.80 40
4-Oct-12 940 ND ND ND 3.80 41
13-Feb-13 1080 3.51 ND ND 3.90 37.7
18-Jun-13 953 ND ND ND 4 .04 39.3
12-Sep-13 1040 ND ND ND 4.17 36.4
14-Nov-13 1050 ND ND ND 4.13 37.2
5-Feb-14 946 5.41 ND ND 4.24 38.2
23-May-14 847 4.78 ND ND 4.19 37.7
27-Aug-14 857 ND 1.5 ND 2.90 39
30-Oct-14 926 ND ND ND 3.68 40 .2
18-Mar-15 942 ND ND ND 4.25 40.4
ll-Jun-15 950 ND ND ND 2.62 42.l
I0-Sep-15 897 ND ND ND 4.72 46.7
29-Oct-15 847 ND ND ND 3.49 40.6
22-Mar-16 834 ND ND ND 4.43 42.4
8-Jun-16 909 ND ND ND 3.75 44.1
4-Aug-16 1000 ND ND ND 4.21 42.3
27-Oct-16 886 ND ND ND 4.33 45 .8
21-Mar-l 7 986 ND ND ND 3.87 40.5
21-Jun-17 968 ND ND ND 4.15 43.3
4-Aug-17 1070 ND ND ND 4.20 44.7
l 1-Oct-17 884 ND ND ND 4.35 43.7
21-Mar-18 721 ND ND ND 3.96 44.5
14-Jun-18 751 ND ND ND 4.45 41.5
5-Sep-18 781 ND ND ND 4.34 48.5
13-Dec-l 8 838 ND ND ND 3.98 42 .8
20-Mar-19 736 ND ND ND 4.01 41.3
19-Jun-19 862 ND ND ND 4.19 43.0
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-7 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u2'1) (u2'1)
12-Sep-19 801 ND ND ND 3.76 39.7
18-Dec-19 546 ND ND ND 3.11 47.2
18-Mar-20 746 ND ND ND 3.75 42.1
12-Jun-20 864 ND ND ND 4.06 44.1
19-Sep-20 971 ND ND ND 3.87 41.5
11-Nov-20 967 ND ND ND 4.40 42.8
24-Mar-21 875 ND ND ND 4.25 46.2
17-Jun-21 819 ND ND ND 4.80 41.7
23-Sep-21 801 ND ND ND 4.58 42.8
9-Dec-21 868 ND ND ND 3.02 42.9
24-Mar-22 776 0.5 2.1 ND 4.1 41.3
22-Jun-22 447 ND ND ND 3.9 42 .5
15-Sep-22 887 ND ND ND 3 .77 45 .0
9-Dec-22 824 ND ND ND 4 .06 44.8
29-Mar-23 619 ND ND ND 3.85 44.9
21-Jun-23 706 ND ND ND 3.89 45.7
27-Sep-23 790 ND ND ND 4.02 45.2
13-Dec-23 644 ND ND ND 3.97 44.3
15-Mar-24 636 ND ND ND 4.11 44.5
20-Jun-24 796 ND ND ND 3.99 46.l
18-Sep-24 809 ND 4 .2 ND 3.98 42.9
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-8 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ue/l) ' (u£/l)
29-Nov-99 0
15-Mar-00 21.8
2-Sep-00 102
29-Nov-00 107 ND
26-Mar-01 116 ND
20-Jun-01 180 ND
20-Sep-0l 180 0.35
7-Nov-01 180 ND
26-Mar-02 190 0.62
22-May-02 210 0.77
12-Sep-02 300 ND
24-Nov-02 450 ND
28-Mar-03 320 0.8
23-Jun-03 420 ND
12-Sep-03 66.0 ND
8-Nov-03 21.0 0.1
29-Mar-04 24.0 0.65
22-Jun-04 110 0 .52
17-Sep-04 120 ND
l 7-Nov-04 120 ND
16-Mar-05 10 .0 ND
25-May-05 <l NA NA NA 0.2 NA
3 l-Aug-05 l.l <l 1.7 <l <0.1 NA
30-Nov-05 <1 <l <l <1 <0.1 NA
9-Mar-06 1.3 <1 2.1 <l 0.3 39
14-Jun-06 1.0 <l l.8 <1 <0.1 37
20-Jul-06 <l <l <1 <l 0.1 39
8-Nov-06 <l <l <l <1 <0.1 40
28-Feb-07 2.5 <1 <l <l 0.7 39
27-Jun-07 2.5 <l <1 <1 0.2 42
15-Aug-07 1.5 <1 <l <1 <0.1 42
10-Oct-07 3.5 <l <l <1 0.5 43
26-Mar-08 <I <l <l <l 0.1 46
25-Jun-08 <I <l <l <l <0.05 45
10-Sep-08 <I <l <1 <1 <0.05 39
15-Oct-08 <1 <l <I <1 <0.05 44
4-Mar-09 <l <l <l <l <0.1 42
24-Jun-09 <l <l <l <l <0.1 44
15-Sep-09 <l <l <l <l <1 44
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-8 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ue/1) (ue/1)
17-Dec-09 <1 <l <1 <1 <0.1 51
24-Feb-10 <1 <l <l <1 <0.1 57
9-Jun-10 <1 <1 <1 <1 <0.1 42
11-Aug-10 <1 <1 <l <1 <0.1 45
5-Oct-10 <1 <1 <1 <1 <0 .1 46
16-Feb-11 ND ND ND ND ND 52
25-May-11 ND ND ND ND 0.1 45
16-Aug-11 ND ND ND ND 0.1 46
7-Dec-11 ND ND ND ND 0.2 45
18-Jan-12 ND ND ND ND 0.3 45
31-May-12 ND ND ND ND 0.2 44
29-Aug-12 ND ND ND ND 0.1 48
3-Oct-12 ND ND ND ND ND 47
7-Feb-13 ND ND ND ND 0.411 46.6
30-May-13 ND ND ND ND ND 45.5
5-Sep-13 ND ND ND ND ND 47.5
7-Nov-13 ND ND ND ND ND 46.1
23-Jan-14 63.8 ND ND ND 0.166 48.5
6-Feb-14 100 ND ND ND 0.165 46.6
22-May-14 122 ND ND ND 0.538 53
27-Aug-14 107 ND ND ND 0.6 47
29-Oct-14 191 ND ND ND 0.914 46.7
12-Mar-15 961 ND ND ND 2.34 49.6
1 l-Jun-15 981 ND ND ND 1.88 53
10-Sep-15 747 ND ND ND 1.96 59.6
29-Oct-l 5 770 ND ND ND 2.20 52.0
17-Mar-16 634 ND ND ND 2.48 54.2
8-Jun-16 595 ND ND ND 2 .14 58.7
4-Aug-16 522 ND ND ND 2.10 56.9
27-Oct-16 472 ND ND ND 2.16 60.1
21-Mar-17 359 ND ND ND 2.06 57.4
21-Jun-17 256 ND ND ND 1.97 58.8
4-Aug-17 223 ND ND ND 1.64 61.2
11-Oct-17 214 ND ND ND 1.97 52.2
21-Mar-18 220 ND ND ND 1.36 60.8
14-Jun-18 155 ND ND ND 1.31 53.8
5-Sep-18 137 ND ND ND 1.40 63.2
13-Dec-18 93.8 ND ND ND 0.123 65.8
19-Mar-19 103 ND ND ND 1.23 54.3
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-8 (ug/1) Tetrachloride
(ug/1)
Chloride (mg/I) (mg/I)
(uwl) (uwJ.)
19-Jun-19 96.0 ND ND ND 1.10 56.5
12-Sep-19 75.4 ND ND ND 0.999 52.0
l 8-Dec-19 84.4 ND ND ND 1.21 60.1
18-Mar-20 55.0 ND ND ND 1.04 53.8
12-Jun-20 53.8 ND ND ND 1.06 56.9
18-Sep-20 39.5 ND ND ND 0.894 52.6
I l-Nov-20 51.3 ND ND ND 1.27 54 .7
18-Mar-21 26.9 ND ND ND 1.00 52.8
16-Jun-21 22.3 ND ND ND 1.12 51.5
22-Sep-2 I 17.0 ND ND ND 0.665 40.8
8-Dec-21 I 7.2 ND ND ND 0.738 54.9
23-Mar-22 15.l ND ND ND 0.8 50.8
16-Jun-22 10 .9 ND ND ND 0.64 52.8
14-Sep-22 15.3 ND ND ND 0.718 52.5
15-Sep-22 16 .3 ND ND ND 0.718 52.5
8-Dec-22 4.4 ND ND ND 0.654 50.8
29-Mar-23 9.1 ND ND ND 0.658 53.4
21-Jun-23 8.3 ND ND ND 0 .597 55.3
14-Sep-23 7.4 ND ND ND 0.720 53.5
7-Dec-23 7.3 ND ND ND 0.620 53 .7
14-Mar-24 5.9 ND ND ND 0.650 53 .8
13-Jun-24 5.5 ND ND ND 0.544 54 .7
l 7-Sep-24 2.6 ND ND ND 0.479 52.2
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-9 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(uwI) (ue/1)
20-Dec-99 4.2
15-Mar-OO 1.9
2-Sep-00 14.2
29-Nov-OO 39.4 ND
27-Mar-OI 43.6 ND
20-Jun-OI 59 .0 0.15
20-Sep-Ol 19.0 0.4
7-Nov-01 49.0 0.1
26-Mar-02 41.0 0.5
22-May-02 38.0 0.65
12-Sep-02 49.0 0.2
24-Nov-02 51.0 0.6
28-Mar-03 34.0 0.6
23-Jun-03 33.0 0.8
12-Sep-03 32.0 I.I
8-Nov-03 46 .0 1.1
29-Mar-04 48.0 0.82
22-Jun-04 48.0 0.75
l 7-Sep-04 39.0 0.81
17-Nov-04 26.0 1.2
16-Mar-05 3.8 1.3
25-May-05 1.2 NA NA NA 1.3 NA
31-Aug-05 <l <1 2.9 <1 1.3 NA
1-Dec-05 <l <l <I <1 1.3 NA
9-Mar-06 <1 <1 2.6 <1 1.5 38
14-Jun-06 <1 <l 2 .7 <l 1.5 39
20-Jul-06 <l <l <l <l 0.9 41
8-Nov-06 <I <l <I <I 0.7 44
28-Feb-07 <l <1 <I <l 0.6 44
27-Jun-07 21 <I <I <l 1.3 42
15-Aug-07 9 .5 <l <l <l 1.8 38
10-0ct-07 8.7 <l <I <I 2 40
26-Mar-08 1.3 <I <l <I 2.1 35
25-Jun-08 1.0 <I <I <l 2.3 35
IO-Sep-08 <l <l <l <l 2.79 28
15-0ct-08 <l <I <I <l 1.99 58
4-Mar-09 <l <l <l <I 2.5 30
24-Jun-09 <l <l <l <l 2.3 30
15-Sep-09 <l <l <l <I 2.5 30
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-9 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u2'I) Ju2'1)
l 7-Dec-09 <I <l <l <l 1.7 37
23-Feb-10 <I <l <I <l 1.7 47
9-Jun-10 <I <1 <I <I 1.5 33
11-Aug-10 <l <l <I <I 1.2 40
6-Oct-10 <l <I <l <I 1.8 34
17-Feb-ll ND ND ND ND 1.3 41
25-May-l I ND ND ND ND 3.4 38
16-Aug-l l ND ND ND ND 4 21
7-Dec-11 ND ND ND ND 2.3 38
18-Jan-12 ND ND ND ND 2.3 28
31-May-12 ND ND ND ND 4 23
30-Aug-12 ND ND ND ND 3 .9 22
3-Oct-12 ND ND ND ND 3 .8 21
7-Feb-13 ND ND ND ND 4 .12 20.6
30-May-13 ND ND ND ND 4.49 21.4
5-Sep-13 ND ND ND ND 4.03 22.7
7-Nov-13 ND ND ND ND 4.87 23.6
29-Jan-14 ND ND ND ND 4.36 22
21-May-14 6.9 ND ND ND 3.44 24
14-Aug-14 46.9 ND ND ND 2.7 27
29-Oct-14 101 ND ND ND 4.27 25
12-Mar-15 53.5 ND ND ND 3.28 29.5
l l-Jun-15 35. l ND ND ND l.83 35.3
3-Sep-15 48.2 ND ND ND 1.44 39.5
28-Oct-l 5 68.4 ND ND ND 2.89 29.2
l 7-Mar-16 74.3 ND ND ND 2.51 33.6
8-Jun-16 76.2 ND ND ND 2.16 35.1
3-Aug-16 76.8 ND ND ND 2.11 33.6
26-Oct-16 76 ND ND ND 2.24 37.4
16-Mar-l 7 113 ND ND ND 2.18 34.5
21-Jun-l 7 113 ND ND ND 1.92 35.9
3-Aug-17 118 ND ND ND 1.90 37.0
1 l-Oct-17 132 ND ND ND 2.18 32.3
21-Mar-18 159 ND ND ND 1.85 38.3
14-Jun-18 134 ND ND ND 1.85 35.7
5-Sep-18 94.2 ND ND ND 1.04 43.4
13-Dec-l 8 109 ND ND ND 1.23 36.3
19-Mar-19 86.4 ND ND ND 1.09 36.9
19-Jun-19 68.1 ND ND ND 0.785 38.3
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-9 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (uf!ll) (uf!ll)
l l-Sep-19 66.0 ND ND ND 0.904 35.2
18-Dec-19 54.8 ND ND ND 0.744 40.1
18-Mar-20 48.9 ND ND ND 0.855 37.7
12-Jun-20 55.1 ND ND ND 0.990 39.5
18-Sep-20 45.0 ND ND ND 0.867 36.7
l l-Nov-20 47.1 ND ND ND 1. 11 37.2
18-Mar-21 39.0 ND ND ND 1.06 40.7
16-Jun-21 102.0 ND ND ND 1.00 37.4
22-Sep-2 l 30.0 ND ND ND 0.700 30.8
8-Dec-21 25.4 ND ND ND 0.798 36.9
23-Mar-22 16.5 ND ND ND 0.8 34.6
22-Jun-22 9.8 ND ND ND 0.62 41.7
14-Sep-22 10.8 ND ND ND 0.673 32.4
l 5-Sep-22 11.8 ND ND ND 0.673 32.4
8-Dec-22 6.7 ND ND ND 0.676 33.2
29-Mar-23 6.2 ND ND ND 0.765 37.1
21-Jun-23 5.0 ND ND ND 0.742 38.0
14-Sep-23 6.2 ND ND ND 0.690 36.2
7-Dec-23 3.8 ND ND ND 0.960 37.0
14-Mar-24 3.9 ND ND ND 0.777 37.4
12-Jun-24 3.6 ND ND ND 0.791 38.1
l 7-Sep-24 2.3 ND ND ND 0.671 36.3
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-10 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(02/1) (u211)
21-Jan-02 14
26-Mar-02 16 0.14
21-May-02 17 0.11
12-Sep-02 6 ND
24-Nov-02 14 ND
28-Mar-03 29 0.2
23-Jun-03 110 0.4
12-Sep-03 74 0.4
8-Nov-03 75 0.3
29-Mar-04 22 0.1
22-Jun-04 32 ND
l 7-Sep-04 63 0.46
17-Nov-04 120 0.4
16-Mar-05 140 1.6
25-May-05 62.4 NA NA NA 0.8 NA
3 l-Aug-05 110 <2.5 6.2 <2.5 1.1 NA
I-Dec-05 300 <2.5 <2.5 <2.5 3.3 NA
9-Mar-06 190 <5 <50 <50 2.4 50
14-Jun-06 300 <5 <5 0 <50 3.5 54
20-Jul-06 504 <5 <50 <5 0 6.8 61
8-Nov-06 452 <l 1.6 1 5.7 58
28-Feb-07 500 <l <I I 7.6 62
27-Jun-07 350 <l <l 1 5.1 54
15-Aug-07 660 <l <l 1 7.3 59
l 0-Oct-07 470 <l <l 1 6.7 59
26-Mar-08 620 <l <l l 7.3 55
25-Jun-08 720 <l <l 1 9.91 58
1 0-Sep-08 680 <l <I 1 9.23 51
15-Oct-08 1200 <2 <2 2 10.5 61
l l-Mar-09 1100 <l <l 1 11.6 64
24-Jun-09 1200 <l <l l 9.8 62
l 5-Sep-09 910 <] <l 1 8.1 51
22-Dec-09 300 <l <l <l 3.5 51
3-Mar-10 460 <l <l <l 5 49
10-Jun-10 220 <1 <l <l 1.6 42
12-Aug-10 100 <l <l <l 0.8 38
13-Oct-10 1100 <1 <] <l 11 52
23-Feb-11 620 ND ND ND 9 62
1-J un-11 280 ND ND ND 3.3 42
Chloroform Carbon Chloromethane Methylene Nitrate Chloride
TW4-10 (ug/l) Tetrachloride (ug/l) Chloride (mg/I) (mg/I)
(.02/1) (02/l)
17-Aug-l l 180 ND ND ND 1.9 41
16-Nov-11 110 ND ND ND 1.1 45
19-Jan-12 76 ND ND ND 0.9 40
13-Jun-12 79 ND ND ND 0.8 46
12-Sep-12 130 ND ND ND 1.0 44
3-Oct-12 140 ND ND ND 1.6 45
13-Feb-13 154 ND ND ND 1.2 49. l
13-Jun-13 486 ND ND ND 5.6 51.5
12-Sep-13 1160 ND ND ND 13.0 67.9
14-Nov-13 1380 ND ND ND 16.0 70.9
5-Feb-14 1260 5.16 ND ND 16.8 73
23-May-14 1110 ND ND ND 13.9 77.3
27-Aug-14 1060 ND 1.5 ND 9.8 74
30-Oct-14 1220 ND ND ND 13.2 75.2
18-Mar-15 1210 ND ND ND 15.0 78.6
l 1-Jun-15 1240 ND ND ND 11.4 75
l 0-Sep-15 1280 ND ND ND 14.0 89.5
29-Oct-l 5 1350 ND ND ND 13.5 79.9
22-Mar-16 1430 ND ND ND 17.3 84. l
8-Jun-16 1510 ND ND ND 14.9 89.5
4-Aug-16 1500 ND ND ND 14.9 85.3
27-Oct-l 6 1290 ND ND ND 14.8 84.4
21-Mar-17 1260 ND ND ND 13.0 74.6
2 l-Jun-17 1140 ND ND ND 13.0 73.1
4-Aug-17 1320 ND ND ND 13.4 77.0
l l-Oct-17 1150 ND ND ND 12.9 70.0
21-Mar-18 1240 ND ND ND 11.1 72.7
l 4-Jun-18 914 ND ND ND l I.2 64.5
5-Sep-18 911 ND ND ND l 0.1 73.5
13-Dec-18 1070 ND ND ND 10.6 63.5
20-Mar-l 9 869 ND ND ND 9.34 59.3
19-Jun-19 799 ND ND ND 8.86 58.7
12-Sep-l 9 734 ND ND ND 7.79 55.8
18-Dec-19 768 ND ND ND 6.89 62.0
18-Mar-20 798 ND ND ND 7.83 53.5
12-Jun-20 928 ND ND ND 8.13 60.1
19-Sep-20 854 ND ND ND 7.34 53.9
11-Nov-20 903 ND ND ND 8.69 58.6
24-Mar-21 718 ND ND ND 7.20 58.1
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-10 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(Jiwl) (u2'() I
17-Jun-21 609 ND ND ND 7.75 48.7
23-Sep-2 l 545 ND ND ND 6.35 50.6
9-Dec-21 675 ND ND ND 5.47 51.9
24-Mar-22 471 ND I ND 5.1 49.0
22-Jun-22 342 ND ND ND 4.6 46.0
l 5-Sep-22 563 ND ND ND -5.57 52.0
16-Sep-22 564 ND ND ND 5.57 52.0
9-Dec-22 499 ND ND ND 4.76 43.4
29-Mar-23 361 ND ND ND 4.20 48.6
21-Jun-23 322 ND ND ND 3.76 46.9
27-Sep-23 286 ND ND ND 3.18 44.8
13-Dec-23 450 ND ND ND 3.94 47.0
14-Mar-24 335 ND ND ND 3.75 44.6
20-Jun-24 220 ND ND ND 2.40 41.4
18-Sep-24 252 ND 1.6 ND 2.66 41.6
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-11 Tetrachloride (ug/1) {02/l) (ug/1) Chloride (ug/1) (mg/I) (mg/I)
21-Jan-02 4700
26-Mar-02 4900 9.6
22-May-02 5200 9.07
12-Sep-02 6200 8.84
24-Nov-02 5800 9.7
28-Mar-03 5100 9.7
23-Jun-03 5700 9.4
12-Sep-03 4600 9.9
8-Nov-03 5200 9.3
29-Mar-04 5300 9.07
22-Jun-04 5700 8.74
17-Sep-04 4800 8.75
17-Nov-04 5800 9.7
16-Mar-05 4400 8.7
25-May-05 3590 NA NA NA 10.3 NA
3 l-Aug-05 4400 <10 <IO <10 9.4 NA
l-Dec-05 4400 <100 <100 <100 9.4 NA
9-Mar-06 4400 <50 <50 <50 9.2 56
14-Jun-06 4300 <50 <50 <50 10 56
20-Jul-06 4080 <50 <50 <50 10 55
8-Nov-06 3660 1.7 2.7 1.3 10 55
28-Feb-07 3500 1.3 <I 1.6 10.1 54
27-Jun-07 3800 1.6 <1 1.1 10.6 53
15-Aug-07 4500 1.7 <1 1.1 10.2 53
10-Oct-07 4400 1.6 <1 1.2 9.8 53
26-Mar-08 340 <I <1 <l 7.7 63
25-Jun-08 640 <1 <1 <1 7.28 46
10-Sep-08 900 <l <1 <l 7.93 42
15-Oct-08 1000 <2 <2 <2 9.46 47
1 l-Mar-09 1100 <I <1 <I 7.3 49
24-Jun-09 980 <l <l <I 6.8 44
15-Sep-09 1000 <l <l <1 7 49
29-Dec-09 860 <l <l <I 6.6 46
3-Mar-10 820 <l <l <l 6.8 42
10-Jun-10 820 <1 <l <I 6.9 40
12-Aug-10 800 <l <l <l 6.7 43
13-Oct-10 720 <1 <l <I 6.4 49
23-Feb-11 1000 ND ND ND 6.5 46
1-Jun-11 930 ND ND ND 7.3 49
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-11 Tetrachloride (ug/1) (ul?fl) (ug/1) Chloride (ug/1) (mg/I) (mg/I)
l 7-Aug-11 820 ND ND ND 7.1 48
16-Nov-l l 1500 ND ND ND 7.1 46
24-Jan-12 610 ND ND ND 6.8 43
13-Jun-12 660 ND ND ND 6.7 52
13-Sep-12 740 ND ND ND 3 49
4-Oct-12 730 ND ND ND 7 50
13-Feb-13 867 3.23 ND ND 6.83 47.3
l 8-Jun-13 788 ND ND ND 7.42 49.7
12-Sep-13 865 ND ND ND 7.8 46.6
13-Nov-13 874 ND ND ND 8.01 46.7
5-Feb-14 785 5.19 ND ND 8.47 48.5
23-May-14 751 ND ND ND 6.92 51.6
27-Aug-14 719 ND 1.2 ND 5.4 48
29-Oct-14 803 ND ND ND 7.33 56.4
9-Mar-15 2450 1.24 ND ND 8.72 49.8
8-Jun-15 2710 ND ND ND 8.48 62.2
31-Aug-15 1120 ND 1.62 ND 9.61 73.1
19-Oct-15 2730 ND ND ND 7.5 55.3
9-Mar-16 2660 1.2 ND ND 7.13 55.5
23-May-16 3340 2.19 ND ND 7.81 56.4
25-Jul-16 3200 ND ND ND 8.83 55.3
12-Oct-16 3180 1.58 ND ND 8.92 57.2
8-Mar-17 3310 1. 71 ND ND 8.12 49.8
13-Jun-17 3370 1.83 ND ND 7.92 51.4
26-Jul-l 7 3290 1.81 ND ND 7.78 51.0
11-Oct-l 7 2880 1.48 ND ND 7.79 49.7
12-Mar-18 3090 1.82 ND ND 7.89 54.0
8-Jun-18 2800 1.34 ND ND 7.51 52.6
22-Aug-18 3050 1.47 ND ND 7.15 53.3
28-Nov-18 2930 1.33 ND ND 6.85 45.4
8-Mar-19 2820 1.48 ND ND 7.50 46.8
5-Jun-19 2970 1.52 1.40 ND 8.30 45.3
4-Sep-19 2790 ND ND ND 7.15 48.8
1 0-Dec-19 3250 ND ND ND 7.14 49.0
19-Feb-20 2990 ND ND ND 7.07 51.9
27-May-20 2810 1.37 ND ND 7.56 48 .6
4-Sep-20 3070 1.37 ND ND 7.59 46.3
28-Oct-20 2670 ND 3.86 ND 7.19 43.3
23-Feb-21 2750 ND 3.86 ND 7.21 49.5
Chloroform Carbon Chloromethane Methylene Nitrate Chloride
TW4-11 Tetrachloride (ug/1)
(~1!11)
(ug/1) Chloride (ug/1) (mg/I) (mg/I)
9-Jun-21 3320 ND ND ND 8.17 37.7
24-Aug-21 2600 ND ND ND 5.78 40.2
1-Dec-21 2850 ND ND ND 7.44 48.4
9-Mar-22 2780 ND ND ND 7.4 41.5
8-Jun-22 2550 1.0 2.7 ND 5.9 44.5
30-Aug-22 3020 ND ND ND 6.90 42.4
31-Aug-22 3021 ND ND ND 6.90 42.4
30-Nov-22 2900 ND ND ND 7.05 36.6
7-Mar-23 2430 ND ND ND 5.68 39.2
13-Jun-23 2510 ND 2.9 ND 6.70 40.9
9-Aug-23 2630 ND ND ND 6.05 45.2
29-Nov-23 4180 ND ND ND 6.69 46.7
21-Feb-24 2530 ND ND ND 7.20 41.9
29-May-24 4110 ND ND ND 6.81 45.1
20-Aug-24 3200 1.2 ND ND 6.94 3L2
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-12 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ui!/D (u2/l)
12-Sep-02 2 2.54
24-Nov-02 0 2.2
28-Mar-03 0 1.9
23-Jun-03 0 1.8
12-Sep-03 0 1.8
9-Nov-03 0 1.6
29-Mar-04 0 1.58
22-Jun-04 0 1.4
17-Sep-04 0 1.24
17-Nov-04 0 1.5
16-Mar-05 0 1.4
25-May-05 <1 NA NA NA 1.6 NA
31-Aug-05 <1 <1 5.8 <1 1.5 NA
1-Dec-05 <1 <1 1.9 <2 1.4 NA
9-Mar-06 <1 <1 2.6 <1 1.3 19
14-Jun-06 <1 <1 1.4 <1 1.4 16
20-Jul-06 <1 <1 <l <I 1.4 16
8-Nov-06 <I <1 <l <1 1.4 16
28-Feb-07 <I <1 <1 <1 1.5 16
27-Jun-07 <1 <1 <I <1 1,5 18
15-Aug-07 <1 <1 <I <1 1.4 29
10-Oct-07 <1 <1 <1 <1 1.4 16
26-Mar-08 <1 <1 <1 <1 1.6 16
25-Jun-08 <1 <1 <1 <1 2.69 19
10-Sep-08 <I <1 <1 <1 2.65 18
15-Oct-08 <1 <1 <1 <1 2.47 22
4-Mar-09 <1 <1 <1 <l 2.4 23
24-Jun-09 <1 <I <1 <l 3.8 22
15-Sep-09 <1 <1 <I <1 5.1 22
16-Dec-09 <1 <1 <1 <1 3.6 23
23-Feb-10 <1 <1 <1 <1 4 22
8-Jun-10 <1 <1 <1 <I 11 29
10-Aug-10 <1 <1 <1 <1 9 35
5-Oct-10 <1 <1 <1 <1 8 31
15-Feb-11 ND ND ND ND 6.5 31
25-May-11 ND ND ND ND 7 32
16-Aug-11 ND ND ND ND 6.8 31
15-Nov-11 ND ND ND ND 8 30
17-Jan-12 ND ND ND ND 7.7 28
Chloroform Carbon Chlorometbane Methylene Nitrate Chloride TW4-12 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(uwl) (ut!/1)
31-May-12 ND ND ND ND 10 34
29-Aug-12 ND ND ND ND 13 39
3-Oct-12 ND ND ND ND 13 39
7-Feb-13 ND ND ND ND 12.6 36.7
29-May-13 ND ND ND ND 14.2 38.6
29-Aug-13 ND ND ND ND 17.4 41.7
6-Nov-13 ND ND ND ND 16.4 41.4
22-Jan-14 ND ND ND ND 18.4 41.6
21-May-14 ND ND ND ND 17 40.2
27-Aug-14 ND ND ND ND 13 47
23-Oct-l 4 ND ND ND ND 16. l 50.2
l l-Mar-15 ND ND ND ND 19 .2 50.6
10-Jun-15 ND ND ND ND 18.8 56
2-Sep-15 ND ND ND ND 16.4 60.2
21-Oct-15 ND ND ND ND 18 51.0
15-Mar-16 ND ND ND ND 34.8 56.2
25-May-16 ND ND ND ND 30.7 66.4
27-Jul-16 ND ND ND ND 37.7 67.5
19-Oct-16 ND ND ND ND 25.8 72.6
14-Mar-l 7 ND ND ND ND 25.9 62.6
14-Jun-17 1.25 ND ND ND 29.9 67.2
2-Aug-17 1.20 ND ND ND 25.1 65.3
10-Oct-l 7 ND ND ND ND 26.9 56.2
14-Mar-l 8 ND ND ND ND 19.8 59.5
12-Jun-18 ND ND ND ND 18.4 53.6
29-Aug-18 ND ND ND ND 13.6 59.9
30-Nov-18 ND ND ND ND 10.4 56.1
16-Mar-19 ND ND ND ND 10 .1 50.8
13-Jun-l 9 ND ND ND ND 8.31 55.3
ll-Sep-19 ND ND ND ND 8.88 52.6
14-Dec-19 ND ND ND ND 8.04 58.0
l 7-Mar-20 ND ND ND ND 6.39 53.0
10-Jun-20 ND ND ND ND 4.95 51.7
l 7-Sep-20 ND ND ND ND 2.34 50.3
4-Nov-20 ND ND ND ND 5.91 48.0
l 7-Mar-21 ND ND ND ND 3.10 52.0
15-Jun-21 ND ND ND ND 2.39 51.8
15-Sep-2 l ND ND ND ND 1.95 36.1
7-Dec-21 ND ND ND ND 1.46 49.8
Chloroform Carbon Cbloromethane Methylene Nitrate Chloride TW4-12 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) ful!fl) (ue/1)
15-Mar-22 ND ND ND ND 8.4 25.8
15-Jun-22 ND ND ND ND 16.0 53.3
13-Sep-22 ND ND ND ND 13.80 57.9
7-Dec-22 ND ND ND ND 4.68 49.2
22-Mar-23 ND ND ND ND 2.84 35.9
l 5-Jun-23 ND ND ND ND 4.72 43.6
13-Sep-23 ND ND ND ND 4 .02 50.3
6-Dec-23 ND ND ND ND 7.09 32.8
13-Mar-24 ND ND ND ND 10.90 53.1
l l-Jun-24 ND ND ND ND 3.49 53.0
12-Sep-24 ND ND ND ND 9.78 47.2
1-Sep-02
1-Mar-04
1-Sep-05
1-Mar-07
1-Sep-08
1-Mar-10
1-Sep-11
0
0
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' 0
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0
0
0
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1-Mar-13 • ►
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1-Sep-14 '
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1-Mar-16
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1-Sep-17 .
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1-Mar-19
1-Sep-20 a
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1-Sep-23
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1-Mar-25
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Ii Carbon Methylene Chloroform Chloromethane Nitrate Chloride TW4-13 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u!!:/1) (m!/1) -
12-Sep-02 ND ND
24-Nov-02 ND ND
28-Mar-03 ND 0.20
23-Jun-03 ND 0.20
12-Sep-03 ND ND
9-Nov-03 ND 0.90
29-Mar-04 ND 0.12
22-Jun-04 ND 0.17
l 7-Sep-04 ND 4.43
l 7-Nov-04 ND 4.70
16-Mar-05 ND 4.20
25-May-05 <I NA NA NA 4.30 NA
3 l-Aug-05 <I <I 3.1 <I 4.60 NA
l-Dec-05 <I <I <] <I 4.30 NA
9-Mar-06 <] <I 1.7 <I 4.20 67.0
14-Jun-06 <I <] 1.4 <I 4.90 66.0
20-Jul-06 <1 <] <] <] 4.30 65.0
8-Nov-06 <1 <] <] <l 0.80 33.0
28-Feb-07 <1 <I <] <] 4.00 59.0
27-Jun-07 <l <] <] <] 4.60 59.0
15-Aug-07 <1 <] <] <l 4.40 58.0
10-Oct-07 <1 <I <] <] 4.10 58.0
26-Mar-08 <l <I <l <l 3.80 54.0
25-Jun-08 <1 <l <l <] 4.24 58.0
10-Sep-08 <1 <I <] <l 4.26 50.0
15-Oct-08 <l <] <] <] 4.63 58.0
4-Mar-09 <l <] <] <] 3.70 58.0
24-Jun-09 <l <] <] <] 1.20 57.0
l 5-Sep-09 <1 <] <l <l 4.70 63.0
16-Dec-09 <1 <I <I <I 4.10 60.0
24-Feb-I0 <I <l <l <1 4.30 53.0
8-Jun-10 <I <l <l <I 5.20 52.0
10-Aug-10 <] <I <[ <I 5.60 55.0
5-Oct-10 <I <I <I <[ 5.80 55.0
15-Feb-ll ND ND ND ND 5.50 60.0
25-May-I I ND ND ND ND 5.40 56.0
16-Aug-1 I ND ND ND ND 5.20 60.0
15-Nov-I 1 ND ND ND ND 5.90 54.0
17-Jan-12 ND ND ND ND 5.50 55.0
31-May-12 ND ND ND ND 6.00 59.0
29-Aug-12 ND ND ND ND 6.20 60.0
3-Oct-12 ND ND ND ND 5.90 60.0
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-13 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u!!/1) (u!!/1)
7-Feb-13 ND ND ND ND 6.31 59.3
29-May-13 ND ND ND ND 6.84 56
29-Aug-13 ND ND ND ND 7.16 63.5
6-Nov-13 ND ND ND ND 6.48 58.5
22-Jan-14 ND ND ND ND 7.09 63.1
21-May-14 ND ND ND ND 5.99 56.1
13-Aug-14 ND ND ND ND 4.80 62
23-Oct-14 ND ND ND ND 6.28 66.1
I 1-Mar-15 ND ND ND ND 7.09 66.4
1 0-Jun-15 ND ND ND ND 6.32 70.3
2-Sep-15 ND ND ND ND 5.70 76.5
21-Oct-15 ND ND ND ND 5.78 65.5
16-Mar-l 6 ND ND ND ND 7.97 69.4
25-May-16 ND ND ND ND 5.87 71.8
28-Jul-16 ND ND ND ND 6.14 69.3
19-Oct-16 ND ND ND ND 6.20 70.9
15-Mar-l 7 ND ND ND ND 6.05 66.0
15-Jun-17 ND ND ND ND 6.49 70.4
2-Aug-17 ND ND ND ND 6.15 70.5
10-Oct-l 7 ND ND ND ND 6.17 60.9
l 4-Mar-18 ND ND ND ND 5.76 71.0
12-Jun-18 ND ND ND ND 6.24 65.0
29-Aug-18 ND ND ND ND 5.13 73.7
30-Nov-l 8 ND ND ND ND 5.29 64.5
16-Mar-l 9 ND ND ND ND 5.74 61.6
13-Jun-19 ND ND ND ND 6.56 65.4
13-Sep-19 ND ND ND ND 5.19 65.3
14-Dec-19 ND ND ND ND 5.17 68.7
17-Mar-20 ND ND ND ND 5.50 63.9
11-Jun-20 ND ND ND ND 5.96 62.7
l 7-Sep-20 ND ND ND ND 5.25 60.2
4-Nov-20 ND ND ND ND 4.92 60.6
17-Mar-21 ND ND ND ND 5.57 67.3
15-Jun-21 ND ND ND ND 2.88 57.7
l 5-Sep-21 ND ND ND ND 4.80 54.2
7-Dec-21 ND ND ND ND 5.06 61.0
16-Mar-22 ND ND ND ND 4.8 59.2
l 5-Jun-22 ND ND ND ND 4.5 62.6
l 3-Sep-22 ND ND ND ND 4.37 62.4
Chlorl).1'.orw Carboo CblOTOJ8eth:aJle lethylene Ni trate C"hJ01'i~ TW4-13 (ug!l) Tetn1e hl,1ide (ug/t C b:l_@ride (mg/I) (m /1
ftteAl:) " (t!£!1)
7-Dec-22 ND ND ND ND 4.87 56.9
23-Mar-23 ND ND ND ND 4.47 57.6
15-Jun-23 ND ND ND ND 4.60 63.2
l 3-Sep-23 ND ND ND ND 3.93 60.9
6-Dec-23 ND ND ND ND 3.78 54.0
13-Mar-24 ND ND ND ND 4.16 63.5
11-Jun-24 ND ND ND ND 4.66 63.0
12-Sep-24 ND ND ND ND 4.14 59.1
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-14 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ue/1) (ue/1)
8-Nov-06 <1 <1 <1 <1 2.40 37.0
28-Feb-07 <1 <1 <1 <1 2.30 38.0
27-Jun-07 <1 <1 <1 <1 1.40 38.0
15-Aug-07 <1 <1 <I <I I.IO 36.0
1 0-Oct-07 <1 <1 <1 <1 0.80 36.0
26-Mar-08 <1 <1 <1 <1 0.04 57.0
25-Jun-08 <1 <1 <l <l 1.56 35.0
10-Sep-08 <1 <1 <I <1 1.34 34.0
l 5-Oct-08 <1 <1 <l <1 0.76 40.0
4-Mar-09 <I <1 <l <1 1.60 35.0
24-Jun-09 <1 <1 <I <I 1.40 36.0
15-Sep-09 <l . <1 <1 <1 1.50 38.0
16-Dec-09 <1 <1 <1 <l 1.40 34.0
3-Mar-10 <1 <1 <1 <1 2.50 33.0
8-Jun-l 0 <1 <1 <1 <1 2.90 49.0
10-Aug-10 <I <l <1 <1 2.80 35.0
6-Oct-10 <1 <1 <I <1 2.90 29.0
15-Feb-ll ND ND ND ND 1.80 25.0
16-Aug-11 ND ND ND ND 2.60 33.0
15-Nov-l 1 ND ND ND ND 1.70 15.0
17-Jan-12 ND ND ND ND 1.90 20.0
31-May-12 ND ND ND ND 3.30 35.0
29-Aug-12 ND ND ND ND 3.90 37.0
3-Oct-12 ND ND ND ND 4.20 37.0
7-Feb-13 ND ND ND ND 4.63 35.2
30-May-13 ND ND ND ND 4.37 38.6
29-Aug-13 ND ND ND ND 4.51 37.6
6-Nov-13 ND ND ND ND 4.81 36.5
22-Jan-14 ND ND ND ND 5.92 35.5
21-May-14 ND ND ND ND 4.87 32.5
13-Aug-14 ND ND ND ND 4.10 38.0
23-Oct-14 1.68 ND ND ND 5.22 38.9
12-Mar-15 1.71 ND ND ND 5.22 40.1
10-Jun-15 1.82 ND ND ND 3.55 41.8
3-Sep-15 ND ND ND ND 2.77 42.4
2 l-Oct-15 1.46 ND ND ND 2.45 40.6
I 6-Mar-16 4.49 ND ND 2.18 2.94 42.4
26-May-16 6.15 ND ND 3.18 2.45 43.6
28-Jul-16 5.00 ND ND 1.80 2.88 42.4
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-14 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ue/1) (02/1) -
20-Oct-16 7.02 ND ND 1.59 2.86 45.6
15-Mar-17 6.45 ND ND ND 4.36 45.4
15-Jun-17 6.85 ND ND ND 5.12 46.9
2-Aug-17 6.14 ND ND ND 4.84 46.4
1 0-Oct-17 6.13 ND ND ND 4.73 42.5
15-Mar-18 5.80 ND ND ND 5.67 51.5
13-Jun-18 5.12 ND ND ND 6.36 46§
30-Aug-18 4.76 ND ND ND 5.34 54.1
12-Dec-18 4.41 ND ND ND 5.85 48.7
16-Mar-19 4.08 ND ND ND 6.16 48.7
13-Jun-19 4.18 ND ND ND 5.86 48.3
11-Sep-19 6.08 ND ND ND 4.77 45.4
14-Dec-19 3.83 ND ND ND 4.76 49.4
17-Mar-20 2.98 ND ND ND 6.17 48.4
I 1-Jun-20 2.87 ND ND ND 6.57 47.6
18-Sep-20 2.41 ND ND ND 5.57 45.1
4-Nov-20 2.69 ND ND ND 5.81 49.7
18-Mar-21 1.77 ND ND ND 5.56 48.2
16-Jun-21 ND ND ND ND 7.02 49.5
15-Sep-21 ND ND ND ND 5.56 34.4
8-Dec-21 ND ND ND ND 5.70 49.0
16-Mar-22 ND ND ND ND 5.9 42.0
16-Jun-22 1.0 ND ND ND 5.3 48.4
14-Sep-22 1.1 ND ND ND 4.78 42.2
8-Dec-22 ND ND ND ND 6.20 43.5
23-Mar-23 ND ND ND ND 5.58 47.6
15-Jun-23 ND ND ND ND 6.12 50.0
13-Sep-23 ND ND ND ND 6.22 44.0
6-Dec-23 ND ND ND ND 4.94 42. l
13-Mar-24 ND ND ND ND 6.99 50.8
12-Jun-24 ND ND ND ND 6.86 47.0
12-Sep-24 ND ND ND ND 7.41 47.9
Chloroform Carbon Chloromethane Methylene Nitrate Chloride MW-26 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u!!ll) (u2').)
12-Sep-02 3 ND
24-Nov-02 0 ND
28-Mar-03 0 0.1
23-Jun-03 7800 14.5
15-Aug-03 7400 16.8
12-Sep-03 2500 2.7
25-Sep-03 2600 2.5
29-Oct-03 3100 3.1
8-Nov-03 3000 2.8
29-Mar-04 NA NA
22-Jun-04 NA NA
l 7-Sep-04 1400 0.53
l 7-Nov-04 300 0.2
16-Mar-05 310 0.3
30-Mar-05 230 0.2
25-May-05 442 NA NA NA 0.2 NA
3 l-Aug-05 960 <5 5.4 <5 0.2 NA
l-Dec-05 1000 <50 <50 <50 0.3 NA
9-Mar-06 1100 <50 <50 <50 0.2 52
14-Jun-06 830 <50 <50 <50 0.2 52
20-Jul-06 2170 <50 <50 <50 1.4 65
8-Nov-06 282 <l <l 2.8 0.3 54
28-Feb-07 570 <l <l 5.5 0.5 56
27-Jun-07 300 <l <l 13 0.4 49
15-Aug-07 1400 <l <l 36 1 57
10-Oct-07 2000 <1 <1 14 0.6 57
26-Mar-08 930 <1 <1 40 0.1 49
25-Jun-08 1300 <1 <1 53 0.56 57
10-Sep-08 630 <1 <1 24 0.24 44
15-Oct-08 1700 <l <1 100 0.65 64
4-Mar-09 950 <1 <1 51 0.4 49
24-Jun-09 410 <l <1 12 0.2 48
15-Sep-09 850 <l <1 30 0.1 46
14-Dec-09 1100 <l <l 40 2.3 60
l 7-Feb-10 780 <l <l 19 0.2 57
9-Jun-10 1900 <l <l 28 1.1 58
16-Aug-10 2200 <l <l 21 0.6 49
l l-Oct-10 970 <l <l 6.5 0.7 65
23-Feb-11 450 ND ND 3.6 0.5 57
Chloroform Carbon Chloromethane Methylene Nitrate Chloride MW-26 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u2fl) (u2fl)
31-May-ll 1800 ND ND 1.3 0.4 88
17-Aug-ll 720 ND ND 7.2 0.9 58
5-Dec-11 1800 ND ND 2.9 2 69
7-Feb-12 2400 ND ND 16 1.7 98
6-Jun-12 3000 ND ND 21 2.5 73
4-Sep-12 3100 ND ND 31 2 .6 73
4-Oct-12 1200 ND ND 4 1.8 68
l l-Feb-13 2120 ND ND 9.34 2.27 81.9
5-Jun-13 4030 ND ND 52.4 2.11 77.9
3-Sep-13 2940 ND ND 33.2 1.18 60.5
29-Oct-13 1410 ND ND 4.03 1.38 72.3
27-Jan-14 1400 ND ND 13.8 0.549 59.4
19-May-14 1960 ND ND 15.4 0.928 53.4
11-Aug-14 2120 ND 8.7 26 0.7 59
21-Oct-14 2090 ND ND 23.2 0.934 60.1
9-Mar-15 1980 ND ND 27.4 0 .732 56.5
8-Jun-15 1980 ND ND 11.2 0.419 62
31-Aug-15 2350 ND 4.05 11.6 0.684 69.6
19-Oct-15 2680 ND 1.32 8.28 0.991 62.6
9-Mar-16 2650 ND 1.32 4.66 1.45 68.3
23-May-16 222 0 ND ND 4.57 l.12 66.2
25-Jul-16 3190 ND ND 7.81 1.57 66.4
12-Oct-16 2510 ND ND 4.31 1.18 66.2
8-Mar-17 1290 ND ND 7.65 0 .768 58.4
13-Jun-l 7 2450 ND ND 7.59 0 .922 64.3
26-Jul-l7 1230 ND ND 5.26 1.56 61.4
1 l-Oct-17 2570 ND ND 7.83 1.18 62.2
12-Mar-18 1210 ND ND 2.14 1.57 60.3
8-Jun-18 1870 ND ND 9.19 0.901 58.7
22-Aug-18 1680 ND ND ND 2.80 91.4
28-Nov-18 1480 ND ND ND 1.96 85.5
8-Mar-19 1110 ND ND 2.20 1.85 69.9
5-Jun-19 1280 ND ND 1.19 2.83 80.7
4-Sep-19 1360 ND ND 1.93 3.08 76.2
1 0-Dec-19 1390 ND ND 1.78 0 .977 83.2
19-Feb-20 1100 ND ND ND 1.17 88.9
27-May-20 1610 ND ND 3 .92 2 .93 77.6
4-Sep-20 1130 ND ND 2.57 0.42 70.0
28-Oct-20 866 ND ND ND 3 .62 67.4
Chloroform Carbon Chloromethane Methylene Nitrate Chloride MW-26
(ug/1)
Tetrachloride
(ug/1)
Chloride
(mg/I) (mg/I) (µ2'].) (u2'].)
23-Feb-21 3060 ND ND 3.46 0.349 59.5
9-Jun-21 998 ND ND ND 0.810 48.6
24-Aug-21 1580 ND ND ND 0.671 46.6
1-Dec-21 826 ND 5.90 ND 0.518 54.7
9-Mar-22 1030 ND ND ND 0.3 50.2
8-Jun-22 611 ND ND ND 0.22 63.4
30-Aug-22 612 ND ND ND 0.662 57.0
30-Nov-22 1040 ND ND ND 0.337 52.l
7-Mar-23 571 ND ND ND 0.694 61.0
13-Jun-23 2230 ND 2.7 ND 0.294 57.6
9-Aug-23 2610 ND 2.7 ND 0.324 62.3
29-Nov-23 836 ND 3.7 ND 1.170 55.7
21-Feb-24 542 ND ND ND 0.331 65.5
29-May-24 4160 ND ND 1.2 2.16 60.l
20-Aug-24 519 ND ND ND 2.33 39.l
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-16 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(ul!ll) (u2'1)
12-Sep-02 140 ND
24-Nov-02 200 ND
28-Mar-03 260 ND
23-Jun-03 370 ND
12-Sep-03 350 ND
8-Nov-03 400 ND
29-Mar-04 430 ND
22-Jun-04 530 ND
l 7-Sep-04 400 ND
l 7-Nov-04 350 ND
16-Mar-05 240 ND
25-May-05 212 NA NA NA <0.l NA
31-Aug-05 85 <l 3 .2 43 <O.l NA
l-Dec-05 14 <2.5 2.6 5.9 1.4 NA
9-Mar-06 39 <l 1.1 21 3 60
14-Jun-06 13 <l 2.4 8 .9 1.9 55
20-Jul-06 5.2 <l <l 2.7 2.7 60
8-Nov-06 13.6 <l <l 9.2 5.6 62
28-Feb-07 8.7 <l <l 6.5 12.3 79
27-Jun-07 2.6 <l <l 1.8 9.9 75
15-Aug-07 7.1 <l <l 5.1 5.4 66
10-Oct-07 1.4 <l <l <l 4.4 69
26-Mar-08 11 <l <l 26 ND 52
25-Jun-08 <l <l <l <l 1.46 58
10-Sep-08 10 <l <l 14 10.5 71
15-Oct-08 3.9 <l <l 6.6 9.82 89
4-Mar-09 <l <l <l <l 9.6 78
24-Jun-09 <l <l <l <I 8.9 76
15-Sep-09 <l <l <l <1 8 .8 79
l 7-Dec-09 <1 <l <l <l 5 .2 76
24-Feb-10 <1 <l <l <l 4.2 77
9-Jun-10 2.1 <1 <l <I 4.7 64
24-Aug-10 4.3 <l <l <l 4.6 72
6-Oct-l 0 3 <l <1 <l 3.3 72
22-Feb-l l 15 ND ND ND 7 86
26-May-l l 16 ND ND ND 5 81
17-Aug-l l 9.2 ND ND ND 1.7 63
16-Nov-l l ND ND ND 1.4 0.4 38
18-Jan-12 ND ND ND 1.7 0.1 48
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-16 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (mun (ue/1)
31-May-12 ND ND ND ND ND 53
30-Aug-12 ND ND ND ND ND 59
3-Oct-12 ND ND ND 3 ND 53
7-Feb-13 ND ND ND 3 ND 58.1
30-May-13 ND ND ND 4.21 ND 49.8
5-Sep-13 ND ND ND ND ND 54.4
7-Nov-13 13.4 ND ND ND 1.37 56.6
29-Jan-14 6.9 ND ND ND 3.16 66.8
22-May-14 14.6 ND ND ND 4.94 80.7
14-Aug-14 229 ND ND ND 5.1 80
24-Sep-14 371 ND ND ND NIA NIA
29-Oct-14 387 ND ND ND 8.40 92 .1
12-Mar-15 153 ND ND ND 4.30 65.3
l l-Jun-15 65.3 ND ND ND 1.06 61
3-Sep-15 82 ND ND ND 1.18 65 .8
28-Oct-l 5 112 ND ND ND 1.69 58.3
l 7-Mar-16 45.9 ND ND ND 1.63 56.5
26-May-16 93.4 ND ND ND 1.89 61.3
3-Aug-16 49 ND ND ND 2.20 60
26-Oct-16 92.9 ND ND ND 2.78 66.7
8-Mar-17 19.1 ND ND ND 2.75 62.2
20-Jun-l 7 64.3 ND ND ND 1.81 60.6
3-Aug-17 143 ND ND ND 2.63 67.1
l l-Oct-17 97.8 ND ND ND 2.12 54.2
20-Mar-18 170 ND ND ND 4.55 85.1
14-Jun-18 54.5 ND ND ND 2.83 62.5
30-Aug-18 54.5 ND ND ND 2.53 73.0
12-Dec-18 52 .0 ND ND ND 2.88 68.8
19-Mar-19 60.6 ND ND ND 3.36 66.3
19-Jun-19 76.2 ND ND ND 2.43 71.5
12-Sep-19 99.8 ND ND ND 3.55 72.9
18-Dec-19 94.3 ND ND ND 3.37 88.6
18-Mar-20 113 ND ND ND 3.91 76.2
12-Jun-20 141 ND ND ND 4.44 79.7
19-Sep-20 220 ND ND ND 4.74 77.4
4-Nov-20 270 'ND ND ND 5.73 85.9
24-Mar-21 248 ND ND ND 5.82 92.6
17-Jun-21 247 ND ND ND 6.74 87.4
23-Sep-2 l 202 ND ND ND 5.32 79.8
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-16 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (uwl) (uwl)
8-Dec-21 189 ND ND ND 4.85 89.9
23-Mar-22 150 ND ND ND 5.0 84.3
22-Jun-22 120 ND ND ND 4.2 93.2
l 5-Sep-22 138 ND ND ND 4.41 89.8
9-Dec-22 152 ND ND ND 4.75 91.0
29-Mar-23 179 ND ND ND 5.69 88.5
21-Jun-23 227 ND ND ND 5.02 94.2
27-Sep-23 182 ND ND ND 4.93 91.9
12-Dec-23 139 ND ND ND 4.58 88.6
14-Mar-24 116 ND ND ND 4.76 91.4
20-Jun-24 89.l ND ND ND 4.63 93.8
l 8-Sep-24 93.7 ND ND ND 4.48 90.9
Chloroform Carbon Chloromethane Methylene Nitrate Chloride MW-32 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ue/\.) (uwl)
12-Sep-02 1.6 ND
24-Nov-02 ND ND
28-Mar-03 ND ND
23-Jun-03 ND ND
12-Sep-03 ND ND
8-Nov-03 ND ND
29-Mar-04 ND ND
22-Jun-04 ND ND
17-Sep-04 ND ND
17-Nov-04 ND ND
16-Mar-05 ND ND
30-Mar-05 ND ND
25-May-05 <1 NA NA NA <0.1 NA
31-Aug-05 <1 <1 3.2 <1 <0.1 NA
1-Dec-05 <1 <l <1 <1 <0.1 NA
9-Mar-06 <1 <l <1 <1 <0.1 32
14-Jun-06 <1 <l 3.5 <1 <0.1 30
20-Jul-06 <1 <1 1.8 <1 <0.1 32
8-Nov-06 <1 <1 1.5 <l <0.1 31
28-Feb-07 <1 <1 <1 <l <0.1 32
27-Jun-07 <l <1 <1 <l <0.1 32
15-Aug-07 <1 <1 <1 <1 <0.1 31
10-Oct-07 <1 <1 <1 <1 <0.1 32
26-Mar-08 <1 <1 <1 <1 <0.1 31
25-Jun-08 <1 <1 <1 <1 <0.05 29
10-Sep-08 <1 <1 <1 <1 <0.05 30
15-Oct-08 <1 <1 <1 <1 <0.05 26
4-Mar-09 <1 <1 <1 <1 <0.1 30
24-Jun-09 <1 <l <1 <1 <0.1 31
l 5-Sep-09 <1 <1 <1 <1 <0.1 33
16-Dec-09 <1 <1 <1 <1 <0.1 34
17-Feb-10 <1 <1 <1 <1 <0.1 38
14-Jun-10 <1 <1 <1 <1 <0.1 32
16-Aug-10 <1 <1 <1 <1 <0.1 28
6-Oct-10 <1 <1 <1 <1 <0.1 24
23-Feb-l 1 ND ND ND ND ND 40
25-May-11 ND ND ND ND ND 31
16-Aug-11 ND ND ND ND ND 33
6-Dec-11 ND ND ND ND ND 32
Chloroform Carbon Chloromethane Methylene Nitrate Chloride MW-32 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ue/1) (Jie/1.)
18-Jan-12 ND ND ND ND ND 21
4-Jun-12 ND ND ND ND ND 32
5-Sep-12 ND ND ND ND ND 33
1 0-Oct-12 ND ND ND ND ND 35
13-Feb-13 ND ND ND ND ND 34.3
18-Jun-13 ND ND ND ND ND 34.9
4-Sep-13 ND ND ND ND ND 33
29-Oct-13 ND ND ND ND ND 35.7
29-Jan-14 ND ND ND ND ND 34
23-May-14 ND ND ND ND ND 39.7
26-Aug-14 ND ND ND ND ND 34
29-Oct-14 ND ND ND ND ND 34.9
17-Mar-15 ND ND ND ND ND 36.3
11-Jun-15 ND ND ND ND ND 35.8
9-Sep-15 ND ND ND ND ND 37.7
28-Oct-15 ND ND ND ND ND 34.7
22-Mar-16 ND ND ND ND ND 36.7
8-Jun-16 ND ND ND ND ND 37.2
17-Aug-16 ND ND ND ND ND 37.5
31-Oct-16 ND ND ND ND ND 36.9
21-Mar-17 ND ND ND ND ND 33.7
21-Jun-17 ND ND ND ND ND 37.2
4-Aug-17 ND ND ND ND ND 38.1
12-Oct-17 ND ND ND ND ND 32.6
15-Mar-18 ND ND ND ND ND 39.4
14-Jun-18 ND ND ND ND ND 34.4
5-Sep-18 ND ND ND ND ND 41.2
29-Oct-18 ND ND ND ND ND 32.9
19-Mar-19 ND ND ND ND ND 35.3
18-Jun-19 ND ND ND ND ND 36.5
11-Sep-19 ND ND ND ND ND 33.7
18-Dec-19 ND ND ND ND ND 36.3
18-Mar-20 ND ND ND ND ND 36.0
12-Jun-20 ND ND ND ND ND 35.6
18-Sep-20 ND ND ND ND ND 34.7
4-Nov-20 ND ND ND ND ND 31.3
22-Mar-21 ND ND ND ND ND 36.8
17-Jun-21 ND ND ND ND ND 35.8
23-Sep-21 ND ND ND ND ND 34.3
Chloroform Carbon Chloromethane Methylene Nitrate Chloride MW-32 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ul?fl) (.u2[l)
9-Dec-21 ND ND ND ND ND 35.8
22-Mar-22 ND ND ND ND ND 28.6
16-May-22 ND ND ND ND ND 26.9
15-Sep-22 ND ND ND ND ND 37.2
8-Dec-22 ND ND ND ND ND 35.1
30-Mar-23 ND ND ND ND ND 36.8
14-Jun-23 ND ND ND ND ND 36.8
26-Sep-23 ND ND ND ND ND 37.5
12-Dec-23 ND ND ND ND ND 37.6
14-Mar-24 ND ND ND ND ND 37.2
19-Jun-24 ND ND ND ND ND 38.2
16-Sep-24 ND ND ND ND ND 36.5
0
0 i-.l
12-Sep-02 :
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12-Mar-04 ◄►
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12-Sep-05 ◄
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12-Mar-10
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12-Sep-11 ►
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12-Mar-13 ◄►
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12-Mar-16 ►
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12-Sep-17
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12-Mar-19 ◄►
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12-Sep-20 ◄ ►
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12-Mar-22
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12-Sep-23
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12-Mar-25
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(ug/L)
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Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-18 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (m!lll (ue/1)
12-Sep-02 440 1.49
24-Nov-02 240 13.3
28-Mar-03 160 13.1
23-Jun-03 110 19
12-Sep-03 68.0 19.9
9-Nov-03 84.0 20.7
29-Mar-04 90.0 14
22-Jun-04 82.0 12.2
17-Sep-04 38.0 14.5
17-Nov-04 51.0 17.3
16-Mar-05 38.0 14.1
25-May-05 29.8 NA NA NA 12.9 NA
31-Aug-05 39 <1 2.8 <1 13.3 NA
I-Dec-05 14 <l 1.1 <I 7.3 NA
9-Mar-06 12.0 <l I.I <1 5.9 5.9
14-Jun-06 12.0 <l 1.6 <1 4.7 35
20-Jul-06 10.8 <l 2.7 <1 6.1 35
8-Nov-06 139 <I <l <1 8.7 34
28-Feb-07 9.2 <l <l <1 5.1 30
27-Jun-07 8.0 <1 <1 <1 4.9 28
15-Aug-07 8.9 <1 <l <I 5 32
I0-Oct-07 7.4 <l <l <1 4.4 27
26-Mar-08 6.4 <l <l <l 0.7 23
25-Jun-08 5.7 <1 <l <1 4.55 23
I0-Sep-08 8.0 <1 <l <1 4.68 26
15-Oct-08 9.4 <1 <l <1 5,15 30
4-Mar-09 11.0 <1 <1 <l 5.2 29
24-Jun-09 16.0 <1 <I <1 6.2 30
15-Sep-09 13.0 <1 <I <l 5.9 26
22-Dec-09 8.2 <I <I <1 5.4 30
24-Feb-10 69.0 <1 <1 <I 5.1 41
9-Jun-10 29.0 <l <l <1 9 35
12-Aug-10 29.0 <l <1 <1 9 37
13-Oct-l 0 30.0 <l <l <l 10 50
22-Feb-1 l 39.0 ND ND ND 10 52
26-May-l l 26.0 ND ND ND 9 36
17-Aug-ll 29.0 ND ND ND 4.6 23
7-Dec-11 28.0 ND ND ND 6.3 23
19-Jan-12 25.0 ND ND ND 4.4 18
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-18 (ug/1) Tetrachloride (ug/1) Chloride (mg/1) (mg/1)
\ (ul!fl) .~ (ul!ll)
13-Jun-12 24.0 ND ND ND 6.6 30
I I-Sep-12 38.0 ND ND ND 6.6 26
3-Oct-12 30.0 ND ND ND 6 27
13-Feb-13 34 .9 ND ND ND 5.58 23.1
13-Jun-13 37 .9 ND ND ND 8.86 22.9
5-Sep-13 41.0 ND ND ND 12.1 36.2
13-Nov-13 44.3 ND ND ND 14.2 37.1
30-Jan-14 38.9 ND ND ND 12.8 40.9
22-May-14 34.8 ND ND ND 12.2 47
14-Aug-14 32.8 ND ND ND 9.8 49
28-Oct-14 33.0 ND ND ND II.I 40.8
12-Mar-15 32.0 ND ND ND 11.7 41.6
I l-Jun-15 30.5 ND ND ND 9.69 43.5
3-Sep-15 28.7 ND ND ND 15.7 47.6
28-Oct-l 5 52.9 ND ND ND 6.24 39.4
l 7-Mar-16 56.6 ND ND ND 5.96 40.7
8-Jun-16 60.0 ND ND ND 5.43 43.8
3-Aug-16 56.3 ND ND ND 5.79 40.7
26-Oct-16 60.1 ND ND ND 5.24 43.9
16-Mar-l 7 62.0 ND ND ND 4.47 39.4
20-Jun-l 7 63.8 ND ND ND 4.5 41.6
3-Aug-17 62.8 ND ND ND 4.24 40.4
10-Oct-l 7 62.9 ND ND ND 4.43 37.1
15-Mar-18 62.3 ND ND ND 4.32 44.3
13-Jun-18 59.9 ND ND ND 4.09 39.5
30-Aug-18 56.2 ND ND ND 3.51 45.6
13-Dec-18 57.6 ND ND ND 3.60 38.2
19-Mar-19 52.8 ND ND ND 3.85 37.6
I 9-Jun-19 54.2 ND ND ND 4.01 39.5
l 1-Sep-19 56.2 ND ND ND 3.25 36.8
18-Dec-l 9 62 .0 ND ND ND 3.02 42.7
18-Mar-20 57.0 ND ND ND 3.71 39.4
12-Jun-20 58.2 ND ND ND 3.62 41.4
I 8-Sep-20 60.0 ND ND ND 3.36 38.7
I 1-Nov-20 58.6 ND ND ND 3.67 39.6
18-Mar-21 52 .0 ND ND ND 3.61 41.8
16-Jun-21 54.2 ND ND ND 4.24 37.7
22-Sep-21 49 .9 ND ND ND 3.37 29.8
8-Dec-21 57 .0 ND ND ND 3.90 41.1
Chloroform Carbon Chloromethane 1,\1.ethylene Nitrate Chloride TW4'-18 (ug/l) Tetrachloride (ug/1) Chloride (mg/I) (mg/1) (ue:/1) (uell)
23-Mar-22 56.0 ND ND ND 3.4 39.1
22-Jun-22 62.9 ND ND ND 3.4 48.1
14-Sep-22 60.6 ND ND ND 3.46 44.7
9-Dec-22 62.6 ND ND ND 3.60 44.4
29-Mar-23 54.4 ND ND ND 3.40 45.6
21-Jun-23 54.6 ND ND ND 3.40 47.1
14-Sep-23 55.5 ND ND ND 3.84 45.8
12-Dec-23 53.9 ND ND ND 3.49 46.1
14-Mar-24 49.6 ND ND ND 3.90 45.2
13-Jun-24 49.3 ND ND ND 4.06 46S
18-Sep-24 47.2 ND ND ND 3.71 45.0
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-19
(ug/1) Tetrachloride (ug/1)
Chloride (mg/I) (mg/I)
(02/1) (ul?ll)
12-Sep-02 7700 47.6
24-Nov-02 5400 42
28-Mar-03 4200 61.4
15-May-03 4700 NA
23-Jun-03 4500 11.4
l 5-Jul-03 2400 6.8
15-Aug-03 2600 4
12-Sep-03 2500 5.7
25-Sep-03 4600 9.2
29-Oct-03 4600 7.7
9-Nov-03 2600 4.8
29-Mar-04 NA NA
22-Jun-04 NA NA
16-Aug-04 7100 9.91
l 7-Sep-04 2600 4.5
17-Nov-04 1800 3.6
16-Mar-05 2200 5.3
25-May-05 1200 5.7
31-Aug-05 1400 <5 <5 <5 4.6 NA
l-Dec-05 2800 <50 <50 <50 <0.1 NA
9-Mar-06 1200 <50 <50 <50 4 86
14-Jun-06 1100 <50 <50 <50 5.2 116
20-Jul-06 1120 <50 <50 <50 4.3 123
8-Nov-06 1050 1.6 2.6 <1 4.6 134
28-Feb-07 1200 1.3 <1 <1 4 133
27-Jun-07 1800 2.3
15-Aug-07 1100 1.9 <1 <1 4.1 129
1 0-Oct-07 1100 1.9 <1 <l 4 132
26-Mar-08 1800 2.9 <l <l 2.2 131
25-Jun-08 1000 I <I <I 2.81 128
1 0-Sep-08 3600 8.6 <1 <1 36.2 113
15-Oct-08 4200 12 <l <l 47.8 124
4-Mar-09 1100 1.2 <1 <l 3.2 127
24-Jun-09 990 l.2 <l <1 2.4 132
15-Sep-09 6600 15 <1 <1 0.1 43
14-Dec-09 4700 16 <1 <1 26.7 124
17-Feb-10 940 1.3 <I <l 2 144
9-Jun-10 1800 4.2 <1 <1 4.4 132
16-Aug-l 0 2000 4.9 <1 <l 5.9 142
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-19 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ue/1) (ue/1)
I I-Oct-I 0 1200 1.3 <I <1 2.7 146
17-Feb-11 3400 17 ND ND 17 135
7-Jun-11 4000 8.3 ND ND 12 148
17-Aug-l l 970 2.1 ND ND 3 148
5-Dec-11 2200 5.4 ND ND · 5 148
23-Jan-12 650 1.5 ND ND 0.6 138
6-Jun-12 460 1.1 ND ND 2.4 149
5-Sep-12 950 3.5 ND ND 2.5 149
3-Oct-12 1500 4 ND ND 4.1 150
I I-Feb-13 4210 5.15 ND ND 7.99 164
5-Jun-13 2070 5.15 ND ND 2.95 148
3-Sep-13 8100 20.7 ND ND 17.6 179
29-Oct-13 942 6.42 ND ND 4 .7 134
27-Jan-14 586 4.05 ND ND 1.62 134
19-May-14 810 5.51 ND ND 1.34 152
l l-Aug-14 1410 1.9 8.3 ND 1.6 140
21-Oct-14 4310 4.8 ND ND 4.72 130
9-Mar-15 4660 8.92 ND ND 8.56 238
8-Jun-15 1570 2.62 ND ND 0.916 180
4-Sep-15 7860 7.78 ND ND 11.6 326
19-Oct-l 5 7840 12.2 5.46 ND 10.6 252
9-Mar-16 7780 13.5 1.40 ND 15.7 276
23-May-l 6 12600 23.1 ND ND 1.27 204
25-Jul-l 6 6040 9.89 ND ND 10.5 214
25-Jul-l 6 6040 9.89 ND ND 10.5 214
13-Oct-16 6640 10.8 ND ND 10.0 200
8-Mar-17 1240 3.06 ND ND I 1.1 461
13-Jun-17 510 1.35 ND ND 0.243 135
26-Jul-17 8840 13 .0 ND ND 1.12 218
l 1-Oct-17 129 ND ND ND 0.377 139
12-Mar-18 2640 1.36 ND ND 8.61 193
8-Jun-18 2980 3.45 ND ND 0.494 138
22-Aug-18 1910 2.03 ND ND 2.55 166
28-Nov-18 5270 6.18 ND ND 0.233 140
8-Mar-19 2050 2.43 ND ND 6 .58 197
5-Jun-19 11500 15.90 ND ND 8.96 160
4-Sep-19 6670 10.10 ND ND 0.332 153
1 0-Dec-19 551 ND ND ND 0.535 147
19-Feb-20 8720 13.7 5.41 ND 10.1 205
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-19 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ue/1) (ue/1)
27-May-20 7600 10.4 ND ND l.14 147
4-Sep-20 1350 1.98 ND ND 11.6 188
28-Oct-20 660 I.IO ND ND 1.10 104
23-Feb-21 6660 8.40 ND ND 6.61 167
9-Jun-2 1 775 ND ND ND 4 .04 115
24-Aug-2 l 4450 7.83 1.98 1.25 6.68 172
1-Dec-21 6950 13.20 ND ND l 1.0 184
9-Mar-22 654 ND ND ND 1.7 119
8-Jun-22 2540 2.7 4.0 ND 1.4 128
30-Aug-22 4750 2.5 ND ND 4.76 178
30-Nov-22 7380 8.0 ND ND 3.58 129
7-Mar-23 230 ND ND ND 1.75 122
13-Jun-23 4850 3 .1 3.4 ND 6.68 167
9-Aug-23 198 ND ND ND 1.57 122
29-Nov-23 1660 1.1 2.7 1.1 1.14 120
21-Feb-24 126 ND ND ND 0 .98 126
29-May-24 1030 1.1 ND ND 0.833 135
20-Aug-24 716 1.0 ND ND 2.41 96.7
1-Sep-01
1-Sep-03
1-Sep-05
1-Sep-07
1-Sep-09
1-Sep-11
1-Sep-13
1-Sep-15
1-Sep-17
1-Sep-19
1-Sep-21
1-Sep-23
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Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-21 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u1?fl) (ue/1.)
25-May-05 192 NA NA NA 14.6 NA
31-Aug-05 78 <5 <5 <5 10.1 NA
l-Dec-05 86 <1 1.0 <l 9.6 NA
9-Mar-06 120 <2.5 <2.5 <2.5 8.5 347
14-Jun-06 130 <2 .5 <2.5 <2 .5 10.2 318
20-Jul-06 106 <2.5 <2 .5 <2.5 8.9 357
8-Nov-06 139 2 <l <1 8.7 296
28-Feb-07 160 1.8 <1 <I 8.7 306
27-Jun-07 300 5.8 <I <I 8.6 327
15-Aug-07 140 <l <l <I 8.6 300
10-Oct-07 120 <l <1 <l 8.3 288
26-Mar-08 380 7 <I <I 14.3 331
25-Jun-08 160 1.7 <l <I 8.81 271
IO-Sep-08 120 1.6 <l <l 7.57 244
15-Oct-08 170 2 <I <2 8.00 284
l l-Mar-09 180 <l <l <l 8.3 279
24-Jun-09 200 <l <l <1 8.1 291
15-Sep-09 140 <l <1 <1 9.2 281
22-Dec-09 160 <l <1 <1 8.4 256
25-Feb-lO 170 <l <l <l 8.4 228
1 0-Jun-10 210 1.2 <l <1 12 266
12-Aug-10 390 9.2 <l <I 14 278
13-Oct-10 200 1.2 <l <1 7 210
22-Feb-11 230 1.2 ND ND 9 303
28-Jun-l 1 290 4.8 ND ND 12 290
17-Aug-11 460 6.3 ND ND 14 287
7-Dec-11 390 6.7 ND ND 13 276
19-Jan-12 420 6.4 ND ND 15 228
13-Jun-12 400 5.4 ND ND 11 285
13-Sep-12 410 6 ND ND 13 142
4-Oct-12 390 7 ND ND 14 270
13-Jan-13 282 5.25 ND ND 11.8 221
I 8-Jun-13 328 3.49 ND ND 13.8 243
12-Sep-13 244 2.13 ND ND 10.3 207
13-Nov-13 204 ND ND ND 9 206
5-Feb-14 220 6.23 ND ND 11.4 200
22-May-14 240 4.73 ND ND 11.5 243
27-Aug-14 204 ND ND ND 7.1 230
29-Oct-14 229 1.04 ND ND 10 252
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-ll (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (uf!/1.) (uf!/1.)
12-Mar-15 292 1.75 ND ND 10.9 255
8-Jun-15 366 1.92 ND ND 13.1 494
31-Aug-15 281 ND ND ND 14.7 499
19-Oct-15 339 ND ND ND 14.3 413
9-Mar-16 390 ND ND ND 14.6 452
23-May-16 545 ND ND ND 13.1 425
25-Jul-16 456 ND ND ND 16.5 457
12-Oct-16 434 ND ND ND 11.4 301
12-Oct-16 434 ND ND ND 11.4 301
8-Mar-17 598 2.36 ND ND 12.0 290
13-Jun-17 224 1.16 ND ND 9.53 309
26-Jul-17 537 1.05 ND ND 18.2 447
11-Oct-17 466 ND ND ND 16.9 378
12-Mar-18 421 ND ND ND 15.8 447
8-Jun-18 532 ND ND ND 14.1 387
22-Aug-18 476 ND ND ND 0.236 182
22-Oct-18 585 ND ND ND 15.2 392
8-Mar-19 323 ND ND ND 8.99 180
5-Jun-19 734 ND ND ND 17.5 456
4-Sep-19 596 ND ND ND 14.7 478
10-Dec-19 794 ND ND ND 5.73 339
19-Feb-20 844 ND 2.58 ND 8.93 446
27-May-20 767 ND ND ND 15.4 353
4-Sep-20 920 ND ND ND 12.6 382
28-Oct-20 948 ND ND ND 16.3 411
23-Feb-21 400 ND ND ND 15.2 454
9-Jun-21 1130 ND ND ND 21.5 461
24-Aug-21 669 ND ND ND 12.9 375
l-Dec-21 649 ND ND ND 17.2 227
9-Mar-22 469 ND ND ND 2.2 110
8-Jun-22 657 ND ND ND 8.9 331
30-Aug-22 1070 ND ND ND 14.3 425
30-Nov-22 482 ND ND ND 2.12 158
7-Mar-23 526 ND ND ND 10.9 335
13-Jun-23 768 ND 1.4 ND 1T3 397
9-Aug-23 49.7 ND 1.4 ND 6.1 161
29-Nov-23 1630 ND 3.2 1.9 9.4 372
21-Feb-24 523 ND ND ND 3.8 129
29-May-24 1210 ND ND ND 32.2 478
Cb:lo:raform Catbnn Cbto:,;,o·mcthinie Methylene ~trate Chloride TW4-21 Tetraddoride Ch loride (11gtl, <uc./1) (11g/l) (lU!:ll)
(mg/1) (mg/I)
20-Aug-24 866 ND ND ND 5.32 115
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-22 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (uwl) (uwl)
25-May-05 340 NA NA NA 18.2 NA
3 I-Aug-05 290 <5 <5 <5 15.7 NA
I-Dec-05 320 <5 <5 <5 15.1 NA
9-Mar-06 390 <10 <10 <10 15.3 236
14-Jun-06 280 <10 <10 <10 14.3 221
20-Jul-06 864 <10 <10 <10 14.5 221
8-Nov-06 350 <1 1.6 <1 15.9 236
28-Feb-07 440 <1 <l <1 20.9 347
27-Jun-07 740 <1 <l <1 19.3 273
15-Aug-07 -S30 <l <1 <l 19.3 259
10-Oct-07 440 <I <l <1 18.8 238
26-Mar-08 1400 <I <1 <1 39.1 519
25-Jun-08 1200 <l <l <l 41.9 271
I0-Sep-08 6300 1.3 <l <l 38.7 524
15-Oct-08 630 <2 <2 <2 36.3 539
ll-Mar-09 390 <l <l <l 20.7 177
24-Jun-09 730 <l <l <l 20.6 177
15-Sep-09 2300 <l <l <l 40.3 391
29-Dec-09 380 <l <l <l 17.8 175
3-Mar-10 2200 <l <l <l 36.6 427
15-Jun-10 540 <l <l <l 19 134
24-Aug-10 340 <l <l <l 15 130
13-Oct-10 340 <l <f <l 16 134
23-Feb-l l 1300 ND ND ND 18 l 14
l-Jun-11 210 ND ND ND 17 138
17-Aug-ll 450 ND ND ND 15 120
7-Dec-11 400 ND ND ND 19 174
19-Jan-12 200 ND ND ND 14 36
13-Jun-12 120 ND ND ND 12.8 35
12-Sep-12 940 ND ND ND 7 121
4-Oct-12 330 ND ND ND 14 130
l l-Feb-13 10600 3.24 ND ND 58 635
5-Jun-13 12500 3.35 ND ND 50.2 586
3-Sep-13 9640 3.25 ND ND 29.7 487
29-Oct-13 13300 8.09 ND ND 45.2 501
27-Jan-14 12100 6.06 ND 2.83 54.6 598
19-May-14 12400 6.65 ND ND 47.2 614
11-Aug-14 12400 1.9 40 ND 41.5 540
21-Oct-14 12400 3.32 I.61 ND 54.9 596
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-22
(ug/1)
Tetrachloride
(ug/1)
Chloride
(mg/I) (mg/I)
(m!/1) (uf!/1)
9-Mar-15 12700 3.77 4.31 ND 69.2 675
8-Jun-15 8050 2.42 3.42 ND 47.1 390
3 l-Aug-15 7810 ND 5.47 ND 64.7 557
19-Oct-15 7530 ND 5.1 ND 56.1 567
9-Mar-16 6070 ND ND ND 31.1 583
23-May-16 8570 2.64 ND ND 58.4 598
25-Jul-16 5840 ND ND ND 61.3 619
12-Oct-16 3370 1.08 ND ND 61.5 588
8-Mar-17 5320 1.56 ND ND 69.8 566
13-Jun-l 7 3670 1.21 ND ND 70.8 572
26-Jul-l 7 5150 ND ND ND 66.1 391
l l-Oct-17 4770 ND ND ND 80.1 600
12-Mar-18 4530 ND ND ND 62.3 607
8-Jun-18 3010 ND ND ND 72.5 580
22-Aug-18 3600 ND ND ND 55.4 613
28-Nov-18 2680 ND ND ND 75.7 567
8-Mar-19 4310 1.02 ND ND 71.9 528
5-Jun-19 4690 ND 1.13 ND 83.9 662
4-Sep-19 3460 ND ND ND 72.5 588
10-Dec-19 3820 ND ND ND 59.9 608
19-Feb-20 3910 ND ND ND 57.7 606
27-May-20 2530 ND ND ND 60.5 578
4-Sep-20 3760 ND ND ND 64.8 514
28-Oct-20 3640 ND 6.83 ND 64.9 523
23-Feb-21 5100 ND ND ND 69.6 618
9-Jun-21 4520 ND ND ND 89.3 408
24-Aug-21 3510 ND ND ND 35.I 410
l-Dec-21 3330 ~D ND ND 68.8 586
9-Mar-22 J320 ND ND ND 40.4 442
8-Jun-22 2600 ND 4.4 ND 45 564
30-Aug-22 Jl90 ND ND ND 69.9 637
30-Nov-22 2350 ND ND 1.6 62.0 601
7-Mar-23 1900 ND ND 1.3 49.1 562
13-Jun-23 2180 ND 3.3 2.1 49.8 596
9-Aug-23 1890 ND ND 1.9 58.8 617
29-Nov-23 3460 ND 6.7 1.3 42.9 577
21-Feb-24 2180 ND ND 1 53.9 489
29-May-24 3670 ND ND ND 55.3 510
20-Aug-24 2140 ND ND ND 38.4 481
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-23 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u2'].) (u2'].)
27-Jun-07 <1 <1 <1 <1 <0.1 47
15-Aug-07 <1 <1 <1 <1 <0.1 46
1 0-Oct-07 <l <l <l <l <0.1 43
26-Mar-08 <1 <l <1 <1 <0.1 41
25-Jun-08 <l <l <1 <l <0.05 41
10-Sep-08 <l <l <1 <l <0.05 35
l 5-Oct-08 <2 <2 <2 <2 <0.05 51
4-Mar-09 <l <l <l <1 <0.1 41
24-Jun-09 <l <l <1 <l <0.1 43
15-Sep-09 <l <l <l <l <0.1 43
16-Dec-09 <1 <1 <l <l <0.I 37
24-Feb-10 <1 <l <l <l <0.I 45
8-Jun-10 <I <I <l <l <0.I 40
10-Aug-10 <1 <I <l <I <0.1 40
5-Oct-10 <1 <1 <l <l <0.1 34
16-Feb-1 l ND ND ND ND ND 44
25-May-1 l ND ND ND ND ND 44
16-Aug-11 ND ND ND ND ND 41
15-Nov-11 ND ND ND ND ND 43
l 7-Jan-12 ND ND ND ND ND 40
31-May-12 ND ND ND ND ND 44
29-Aug-12 ND ND ND ND ND 46
3-Oct-12 ND ND ND ND ND 45
7-Feb-13 ND ND ND ND ND 43.6
30-May-13 ND ND ND ND 0.116 44.7
5-Sep-13 ND ND ND ND ND 48.0
7-Nov-13 ND ND ND ND ND 43 .0
23-Jan-14 ND ND ND ND ND 44.6
21-May-14 ND ND ND ND ND 42 .3
13-Aug-14 ND ND ND ND ND 46.0
28-Oct-14 ND ND ND ND ND 46.8
12-Mar-15 ND ND ND ND ND 47.3
10-Jun-15 ND ND ND ND ND 48.4
3-Sep-15 ND ND ND ND ND 54.l
28-Oct-15 ND ND ND ND ND 46.4
16-Mar-16 ND ND ND ND ND 49 .l
26-May-16 ND ND ND ND ND 50.4
3-Aug-16 ND ND ND ND ND 49.6
20-Oct-16 ND ND ND ND ND 52.1
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-23 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u2').) (u2').)
15-Mar-l 7 ND ND ND ND ND 47.7
15-Jun-17 ND ND ND ND ND 51.5
2-Aug-17 ND ND ND ND ND 51.8
1 0-Oct-17 ND ND ND ND ND 44.7
14-Mar-18 ND ND ND ND ND 53.8
13-Jun-18 ND ND ND ND ND 47.6
30-Aug-18 ND ND ND ND ND 56.0
12-Dec-18 ND ND ND ND ND 54.9
16-Mar-19 ND ND ND ND ND 48.9
13-Jun-19 ND ND ND ND ND 50.2
I 1-Sep-19 ND ND ND ND ND 47.9
14-Dec-19 ND ND ND ND ND 54.4
17-Mar-20 ND ND ND ND ND 50.0
I 1-Jun-20 ND ND ND ND ND 49.0
l 7-Sep-20 ND ND ND ND ND 48.8
4-Nov-20 ND ND ND ND ND 49.3
l 7-Mar-21 ND ND ND ND ND 51.6
16-Jun-21 ND ND ND ND ND 48.8
15-Sep-2 l ND ND ND ND ND 42.8
8-Dec-21 ND ND ND ND ND 51.2
22-Mar-22 ND ND ND ND ND 43 .8
16-Jun-22 ND ND ND ND 0 .10 49 .2
14-Sep-22 ND ND ND ND ND 45.0
7-Dec-22 ND ND ND ND ND 47.5
29-Mar-23 ND ND ND ND ND 50.2
20-Jun-23 ND ND ND ND ND 51.3
13-Sep-23 ND ND ND ND ND 42.3
7-Dec-23 ND ND ND ND ND 48.3
13-Mar-24 ND ND ND ND ND 50.5
12-Jun-24 ND ND ND ND ND 51.2
l 7-Sep-24 ND ND ND ND 0.121 49.7
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-24 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) Jowl) (02/1)
27-Jun-07 2.6 <1 <1 <l 26.1 770
15-Aug-07 2.2 <1 <1 <l 29 791
10-Oct-07 1.5 <1 <l <1 24.7 692
26-Mar-08 1.5 <l <l <1 24.4 740
25-Jun-08 1.4 <l <l <1 45.3 834
10-Sep-08 2.9 <l <l <1 38.4 1180
15-Oct-08 <2 <2 <2 <2 44.6 1130
4-Mar-09 1.4 <l <l <l 30.5 1010
24-Jun-09 1.5 <l <l <l 30.4 759
15-Sep-09 1.4 <l <l <l 30.7 618
l 7-Dec-09 1.2 <l <l <l 28.3 1080
25-Feb-10 1.3 <1 <I <I 33.1 896
9-Jun-10 1.7 <I <l <I 30 639
24-Aug-l0 1.8 <I <l <I 31 587
6-Oct-10 1.4 <I <I <I 31 522
17-Feb-ll 1.8 ND ND ND 31 1100
26-May-l I I.I ND ND ND 35 1110
I 7-Aug-11 1.7 ND ND ND 34 967
7-Dec-11 1.2 ND ND ND 35 608
18-Jan-12 ND ND ND ND 37 373
6-Jun-12 ND ND ND ND 37 355
30-Aug-12 1.1 ND ND ND 37 489
3-Oct-12 1.0 ND ND ND 38 405
ll-Feb-13 5.7 ND ND ND 35.9 1260
5-Jun-13 17.4 ND ND ND 23.7 916
3-Sep-13 21.8 ND ND ND 32.6 998
29-Oct-13 32.5 ND ND ND 34.6 1030
27-Jan-14 78.5 ND ND 1.18 31.6 809
19-May-14 62.7 ND ND ND 35 1020
l l-Aug-14 76.3 ND ND ND 31.5 1150
21-Oct-14 25.8 ND ND ND 35.7 1050
9-Mar-15 49.2 ND ND ND 34.6 944
8-Jun-15 4.3 ND ND ND 31.8 1290
3 I-Aug-15 46.9 ND ND ND 25.3 788
19-Oct-15 25.3 ND ND ND 29.6 909
9-Mar-16 22.8 ND ND ND 29.1 989
23-May-16 69.6 ND ND ND 24.2 771
25-Jul-16 17.8 ND ND ND 34.4 1180
12-Oct-16 20.8 ND ND ND 31.9 1010
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-24 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(uwI) (ue/1)
8-Mar-17 18.3 ND ND ND 41.3 1090
13-Jun-17 17.2 ND ND ND 39.9 1080
26-Jul-17 17.8 ND ND ND 40.0 1230
11-Oct-17 16.0 ND ND ND 31.7 895
12-Mar-18 24.9 ND ND ND 44.9 1320
14-Jun-18 49.2 ND ND ND 33.6 792
22-Aug-18 35.0 ND ND ND 33.8 996
28-Nov-18 21.0 ND ND ND 38.4 1100
8-Mar-19 28.1 ND ND ND 39.3 1040
5-Jun-19 28.8 ND ND ND 33.2 1020
4-Sep-19 31.1 ND ND ND 36.4 1130
10-Dec-19 43.3 ND ND ND 33.8 1090
19-Feb-20 61.7 ND ND ND 37.1 1010
27-May-20 49.4 ND ND ND 41.7 1060
4-Sep-20 63.8 ND ND ND 39.1 1100
28-Oct-20 72.6 ND ND ND 35.9 1050
23-Feb-21 96.2 ND 3.6 ND 41.9 1170
9-Jun-21 41.2 ND ND ND 48.0 938
24-Aug-21 103 ND ND ND 26.7 1010
1-Dec-21 112 ND ND ND 43.6 1140
9-Mar-22 114 ND ND ND 36.2 890
8-Jun-22 124 ND ND ND 35 944
30-Aug-22 88.9 ND ND ND 32.0 868
30-Nov-22 79.5 ND ND ND 27.6 972
7-Mar-23 99.5 ND ND ND 36.2 932
13-Jun-23 58.5 ND ND ND 35.9 866
9-Aug-23 65.7 ND ND ND 26.2 928
29-Nov-23 168.0 ND 1.7 1.1 16.9 757
21-Feb-24 87.6 ND ND ND 40.6 1130
29-May-24 66.2 ND ND ND 33.7 891
20-Aug-24 76.4 ND ND ND 7.93 400
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-25 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ue/1.) (ue/1.)
27-Jun-07 <l <l <l <l 17.1 395
15-Aug-07 <l <l <l <l 16.7 382
10-Oct-07 <l <l <l <l 17 356
26-Mar-08 <I <l <I <l 18.7 374
25-Jun-08 <l <l <I <l 22.1 344
10-Sep-08 <l <l <I <l 18.8 333
15-Oct-08 <2 <2 <2 <2 21.3 366
4-Mar-09 <l <l <I <l 15.3 332
24-Jun-09 <l <l <l <l 15.3 328
15-Sep-09 <l <l <l <l 3.3 328
16-Dec-09 <l <l <l <I 14.2 371
23-Feb-10 <l <I <l <l 14.4 296
8-Jun-10 <l <l <l <l 16 306
10-Aug-10 <l <l <l <l 14 250
5-Oct-l 0 <1 <l <l <l 15 312
16-Feb-l l ND ND ND ND 15 315
25-May-l l ND ND ND ND 16 321
16-Aug-l 1 ND ND ND ND 16 276
15-Nov-l 1 ND ND ND ND 16 294
l 8-Jan-12 ND ND ND ND 16 304
3 l-May-12 ND ND ND ND 16 287
11-Sep-12 ND ND ND ND 17 334
3-Oct-12 ND ND ND ND 17 338
ll-Feb-13 ND ND ND ND 9.04 190
5-Jun-13 ND ND ND ND 5.24 136
3-Sep-13 ND ND ND ND 5.69 119
29-Oct-13 ND ND ND ND 6.1 88.6
27-Jan-14 ND ND ND ND 2 .16 85.7
19-May-14 ND ND ND ND 1.21 51.1
11-Aug-14 ND ND ND ND 1.6 67
21-Oct-14 ND ND ND ND 1.03 58.1
9-Mar-15 ND ND ND ND 14.4 310
8-Jun-15 ND ND ND ND 1.14 58.3
3 l-Aug-15 ND ND ND ND 1.63 69.2
21-Oct-15 ND ND ND ND 1.78 93.7
9-Mar-16 ND ND ND ND 0.837 62.7
23-May-16 ND ND ND ND 0.959 75 .5
25-Jul-l 6 ND ND ND ND 1.78 74.1
12-Oct-l 6 ND ND ND ND 1.24 59.8
Chloroform Carbon Chlorometbane Methylene Nitrate Chloride TW4-2S (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ue/1) (m~/1.)
8-Mar-17 1.15 ND ND ND 17 285
13-Jun-17 ND ND ND ND 0.976 69.8
26-Jul-17 ND ND ND ND 1.23 70.1
l l-Oct-17 ND ND ND ND 1.29 68.0
12-Mar-18 ND ND ND ND 2.23 70.5
14-Jun-18 ND ND ND ND 1.14 60.3
22-Aug-18 ND ND ND ND 0.810 69.l
28-Nov-18 ND ND ND ND 0.634 59.7
8-Mar-19 ND ND ND ND 0.639 65.0
5-Jun-19 ND ND ND ND 0.821 59.0
4-Sep-19 ND ND ND ND 0.548 58.1
10-Dec-19 ND ND ND ND 0.841 73.1
19-Feb-20 ND ND NP ND 0.607 86.0
27-May-20 ND ND ND ND 0.851 76.8
4-Sep-20 ND ND ND ND 0.994 67.3
28-Oct-20 ND ND ND ND 1.64 61.3
23-Feb-21 ND ND ND ND 3.43 100
9-Jun-21 ND ND ND ND 1.57 55.1
24-Aug-21 ND ND 1 ND 0.793 69.3
I-Dec-21 ND ND ND ND 0.978 93.7
9-Mar-22 ND ND ND ND 1.8 70.3
8-Jun-22 ND ND ND ND 0.88 72.8
30-Aug-22 ND ND ND ND 1.51 82.5
30-Nov-22 ND ND ND ND 1.47 67.2
7-Mar-23 ND ND ND ND 1.96 96.7
13-Jun-23 ND ND ND ND 1.03 73.0
9-Aug-23 ND ND ND ND 0.790 79.9
29-Nov-23 ND ND ND ND 0.480 70.4
21-Feb-24 ND ND ND ND 0.581 74.3
29-May-24 ND ND ND ND 1.12 77.2
20-Aug-24 ND ND ND ND 1.55 90.0
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Chloroform Carbon Chlorometbane Methylene Nitrate Chloride TW4-26 (ug/l) Tetrachloride (ug/l) Chloride (mg/I) (mg/I) (uefl) (u2'l)
15-Jun-10 13 <1 <l <1 7.9 33
l l-Aug-10 5 <1 <1 <1 9 17
6-Oct-10 5.4 <1 <1 <1 9.6 22
22-Feb-l l 2.0 ND ND ND 10 30
26-May-l l 2.9 ND ND ND 10 15
17-Aug-ll 2.8 ND ND ND 11 19
7-Dec-11 5.2 ND ND ND 10 26
18-Jan-12 7.0 ND ND ND 11 17
6-Jun-12 4.1 ND ND ND 12 19
l 1-Sep-12 4 .9 ND ND ND 9 19
3-Oct-12 6.0 ND ND ND 12 19
7-Feb-13 5.0 ND ND ND 12.5 16.6
13-Jun-13 2.1 ND ND ND 13.6 14.5
5-Sep-13 2.8 ND ND ND 11.7 17 .6
7-Nov-13 3.4 ND ND ND 15.9 15.9
29-Jan-14 1.4 ND ND ND 14.2 16.9
21-May-14 4.2 ND ND ND 12.5 15.4
1 l-Aug-14 1.3 ND ND ND 10.8 15
28-Oct-14 2.45 ND ND ND 12.3 14.6
12-Mar-15 2.37 ND ND ND 14.4 14.4
10-Jun-15 6.12 ND 1.17 ND 11.3 14.4
3-Sep-15 4.77 ND ND ND 14 .2 14.0
28-Oct-15 3.45 ND ND ND 13.9 13.3
16-Mar-16 1.80 ND ND ND 16.9 13.7
26-May-16 8.23 ND ND ND 15.2 13.9
3-Aug-16 4.42 ND ND ND 17.9 13.9
20-Oct-16 19.9 ND ND ND 15.0 14.2
16-Mar-17 46.1 . ND ND ND 15.8 16.2
20-Jun-l 7 244 ND ND ND 15.2 19.0
3-Aug-17 419 ND ND ND 15 .2 25.8
l l-Oct-17 608 ND ND ND 10.0 27.3
21-Mar-18 1050 ND ND ND 12.2 35.5
14-Jun-18 960 ND ND ND 13.2 33.5
5-Sep-18 916 ND ND ND 13.5 38.9
13-Dec-18 1050 ND ND ND 11.8 33.4
20-Mar-19 963 ND ND ND 12.2 32.9
19-Jun-l 9 1070 ND ND ND 12.6 35.8
12-Sep-l 9 877 ND ND ND 10.9 32.0
18-Dec-l 9 1070 ND ND ND 10.3 38.3
18-Mar-20 1090 ND ND ND 11.9 36.3
12-Jun-20 1140 ND ND ND 11.1 35.1
Carbon I Methylene Chloroform Chloromethane Nitrate Chloride TW4-26 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (uwl) (u2/l)
19-Sep-20 1120 ND ND ND 10.5 34.8
I 1-Nov-20 1160 ND ND ND 11.9 36.3
24-Mar-21 1030 ND ND ND 11.3 38.9
l 7-Jun-21 1020 ND ND ND 14.2 34.0
23-Sep-21 927 ND ND ND 12.1 36.5
9-Dec-21 993 ND ND ND 8.15 34.9
24-Mar-22 952 ND 2.4 ND 10.9 33.0
22-Jun-22 790 ND 2.4 ND 9.9 34.0
15-Sep-22 930 ND ND ND 10.3 36.7
9-Dec-22 890 ND ND ND 10.4 32.7
29-Mar-23 703 ND ND ND 10.5 34.5
21-Jun-23 659 ND ND ND 10.0 33.5
27-Sep-23 709 ND ND ND 10.2 34.0
13-Dec-23 776 ND ND ND 10.3 33.9
15-Mar-24 594 ND ND ND 10.2 32.9
20-Jun-24 604 ND ND ND 10.5 31.5
18-Sep-24 549 ND 3.0 ND 10.0 32.3
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-27 Tetrachloride (ug/1) (u2')) (ug/1) Chloride (ug/1) (mg/I) (mg/I)
24-Jan-12 9 ND ND ND 24 11
13-Jun-12 ND ND ND ND 41 17
30-Aug-12 ND ND ND ND 37 21
3-Oct-12 ND ND ND ND 36 18
7-Feb-13 ND ND ND ND 31.2 18.8
30-May-13 ND ND ND ND 29.4 20.3
29-Aug-13 ND ND ND ND 27.2 19
6-Nov-13 ND ND ND ND 29.8 21.8
23-Jan-14 ND ND ND ND 31.3 21.8
21-May-14 ND ND ND ND 31. l 20.6
13-Aug-14 ND ND ND ND 27.0 23
23-Oct-14 ND ND ND ND 28.2 24.4
l l-Mar-15 ND ND ND ND 26.5 26.2
I 0-Jun-15 ND ND ND ND 24.0 26.8
2-Sep-15 1.30 ND ND ND 20.9 26.8
28-Oct-l 5 1.60 ND ND ND 23.5 26.2
l 6-Mar-16 2.11 ND ND ND 25.0 28.0
26-May-16 3.16 ND ND ND 21.2 28.7
3-Aug-16 2.78 ND ND ND 21.8 27.1
20-Oct-16 3.80 ND ND ND 19.3 29.4
15-Mar-17 4.33 ND ND ND 22.2 28.3
15-Jun-l 7 5.65 ND ND ND 23.8 27.9
2-Aug-17 6.05 ND ND ND 20.0 29.5
l 0-Oct-17 5.91 ND ND ND 21.5 26.3
14-Mar-18 6.95 ND ND ND 19.5 30.3
13-Jun-18 5.95 ND ND ND 22.0 28.3
30-Aug-18 7.32 ND ND ND 18.1 31.4
12-Dec-18 7.70 ND ND ND 20.8 28.2
l 6-Mar-19 6.54 ND ND ND 21.5 26.2
l 3-Jun-19 8.24 ND ND ND 22.3 28.6
l l-Sep-19 7.58 ND ND ND 21.2 25.3
14-Dec-19 7.97 ND ND ND 22.0 27.4
l 7-Mar-20 8.04 ND ND ND 23.6 27.6
l l-Jun-20 7.92 ND ND ND 21.5 -28.0
l 8-Sep-20 5.62 ND ND ND 25.2 26.2
4-Nov-20 7.80 ND ND ND 16.7 26.8
18-Mar-21 4.66 ND ND ND 23.0 27.5
16-Jun-2 l 4.26 ND ND ND 23.8 25.8
l 5-Sep-21 3.81 ND ND ND 21. l 21.7
8-Dec-21 4.08 ND ND ND 24.9 26.4
23-Mar-22 3.3 ND ND ND 21.3 22.7
l 6-Jun-22 3.1 ND ND ND 20 22.3
Cblo rl);fc:,.r m Ca,t b 0n CJt1 0:r0m dtnne M 'tlrytm,t~ Nittate Cbiloride T W4-2 7 T(ttra:~ble:ridc (ugflJ f.ul'.MI~ (iO;g/1} Chle:r,ble (llgtl) (mgtl) (JDig/ij
14-Sep-22 4.3 ND ND ND 16.9 23.2
8-Dec-22 2.3 ND ND ND 18.1 16.2
29-Mar-23 2.0 ND ND ND 20.9 22.8
21-Jun-23 2.5 ND ND ND 16.9 25.7
14-Sep-23 2.9 ND ND ND 15.8 26.3
7-Dec-23 2.8 ND ND ND 12.1 26.8
13-Mar-24 2.8 ND ND ND 15.1 26.6
12-Jun-24 3.0 ND ND ND 15.7 27.4
l 7-Sep-24 2.8 ND ND ND 12.8 27.l
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-28 (ug/1) Tetrachloride
(ug/1) Chloride (mg/I) (mg/I) (ue/1) (ue/1)
19-Jun-13 ND ND ND ND 14.9 44.6
29-Aug-13 ND ND ND ND 17.3 45.3
6-Nov-13 ND ND ND ND 16.2 45.2
22-Jan-14 ND ND ND ND 16.9 47.8
21-May-14 ND ND ND ND 16.5 45.7
13-Aug-14 ND ND ND ND 14.2 50
23-Oct-14 ND ND ND ND 16.5 52.1
l 1-Mar-15 ND ND ND ND 19 52.2
1 0-Jun-15 ND ND ND ND 19 56.4
2-Sep-15 ND ND ND ND 17.8 61.4
2 l-Oct-15 ND ND ND ND 18.7 52.7
15-Mar-16 ND ND ND ND 34.0 61.6
25-May-16 ND ND ND ND 29.0 67.1
27-Jul-16 ND ND ND ND 31.3 70.1
19-Oct-16 ND ND ND ND 25.5 70.9
14-Mar-17 ND ND ND ND 24.4 64.2
I 4-Jun-17 ND ND ND ND 26.0 68.6
27-Jul-17 ND ND ND ND 24.8 67.1
1 0-Oct-17 ND ND ND ND 24.8 57.4
14-Mar-18 ND ND ND ND 17.2 65.0
12-Jun-18 ND ND ND ND 19.0 55.7
29-Aug-18 ND ND ND ND 16.0 63.8
30-Nov-18 ND ND ND ND 17.7 52.4
16-Mar-19 ND ND ND ND 17.2 51.7
13-Jun-I 9 ND ND ND ND 15.0 51.8
1 l-Sep-19 ND ND ND ND 10.2 49.0
12-Dec-19 ND ND ND ND 9.48 50.0
17-Mar-20 ND ND ND ND 9.87 52.1
1 0-Jun-20 ND ND ND ND 9.55 49.8
17-Sep-20 ND ND ND ND 8.36 47.4
4-Nov-20 ND ND ND ND 7.76 49.0
I 7-Mar-21 ND ND ND ND 8.68 51.8
15-Jun-21 ND ND ND ND 9.09 48.5
15~Sep-21 ND ND ND ND 8.08 40.7
7-Dec-21 ND ND ND ND 7.06 47.8
15-Mar-22 ND ND ND ND 7.8 38.8
15-Jun-22 ND ND ND ND 15 52.3
13-Sep-22 ND ND ND ND 16.2 58.5
7-Dec-22 ND ND ND ND 16.6 52.0
22-Mar-23 ND ND ND ND 11.9 46.1
15-Jun-23 ND ND ND ND 11.9 51.3
13-Sep-23 ND ND ND ND 11.5 51. J
C1-loroform Ca:rbcn1 Oblf)l"&.ruetbane M-etb)'looe Nitrate Cblorjde 1'W4,.-JS (ng/1) Tetratb1Qtide (ug/ll) Ohl~ride (mg/1) c--, (uetl) (u~/1)
6-Dec-23 ND ND ND ND 9.3 45.3
13-Mar-24 ND ND ND ND 11.8 65.4
11-Jun-24 ND ND ND ND 11.6 65.4
12-Sep-24 ND ND ND ND 12.0 78.5
Jun-13
Sep-13
Dec-13
Mar-14
Jun-14
Sep-14
Dec-14
Mar-15
Jun-15
Sep-15
Dec-15
Mar-16
Jun-16
Sep-16
Dec-16
Mar-17
Jun-17
Sep-17
Dec-17
Mar-18
Jun-18
Sep-18
Dec-18
Mar-19
Jun-19
Sep-19
Dec-19
Mar-20
Jun-20
Sep-20
Dec-20
Mar-21
Jun-21
Sep-21
Dec-21
Mar-22
Jun-22
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Mar-23
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Sep-23
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Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-29
(ug/1)
Tetrachloride
(ug/1)
Chloride (mg/I) (mg/I) (u2'1) (.u!!.11)
19-Jun-13 242 ND ND ND 4.63 44.8
11-Jul-13 262 ND ND ND 3.52 37.7
26-Sep-13 246 ND ND ND 4.18 41.4
13-Nov-13 260 ND ND ND 4.11 42.5
5-Feb-14 258 ND ND ND 4.63 41.9
22-May-14 262 ND ND ND 3.52 38.2
27-Aug-14 242 ND ND ND 3.4 41
29-Oct-14 290 ND ND ND 3.64 41
12-Mar-15 299 ND ND ND 4.14 40.5
11-Jun-15 329 ND ND ND 2.95 42.5
3-Sep-15 276 ND ND ND 2.19 47.3
29-Oct-l 5 631 ND ND ND 2.74 39.8
17-Mar-16 335 ND ND ND 2.92 40.3
8-Jun-16 366 ND ND ND 2.51 42.9
4-Aug-16 401 ND ND ND 2.44 40.6
26-Oct-16 392 ND ND ND 2.4 44.2
l 6-Mar-17 446 ND ND ND 2.24 41.5
21-Jun-17 420 ND ND ND 2.26 42.0
4-Aug-17 466 ND ND ND 2.35 42.9
11-Oct-l 7 466 ND ND ND 2.45 37.7
21-Mar-18 533 ND ND ND 2.44 43.1
14-Jun-18 474 ND ND ND 2.67 40.1
5-Sep-18 454 ND ND ND 2.52 45.9
13-Dec-18 521 ND ND ND 2.50 40.9
20-Mar-19 507 ND ND ND 2.67 39.9
19-Jun-19 537 ND ND ND 2.56 39.4
12-Sep-l 9 549 ND ND ND 2.55 38.0
18-Dec-l 9 630 ND ND ND 2.58 44.8
18-Mar-20 652 ND ND ND 3 .1 41.0
12-Jun-20 686 ND ND ND 3.18 42.2
l 9-Sep-20 621 ND ND ND 2.9 39.9
l l-Nov-20 671 ND ND ND 3.27 40.8
24-Mar-21 577 ND ND ND 3.09 44.3
17-Jun-21 543 ND ND ND 3.59 40.0
23-Sep-2 l 602 ND ND ND 3.29 40. l
9-Dec-21 625 ND ND ND 2.39 38.7
23-Mar-22 624 ND ND ND 3.1 39.1
22-Jun-22 398 ND ND ND 2.9 41.5
15-Sep-22 591 ND ND ND 2.80 41.8
9-Dec-22 588 ND ND ND 2.69 41.3
29-Mar-23 467 ND ND ND 2.74 41.3
2 l-Jun-23 490 ND ND ND 2.65 42.2
Cl'lll@rofotm Carbon Chloromethane Methylene Nitrate Chlorl6 TW'4--29 (Ug'flt} Tetrac:hlorit:le (ugll) CbJoriae
(~g/1) (iJllJ;g/1) (uetl,) fu,g/1~ -
27-Sep-23 457 ND ND ND 2.82 41.1
13-Dec-23 546 ND ND ND 2.71 39.5
15-Mar-24 438 ND ND ND 2.80 40.6
20-Jun-24 441 ND ND ND 2.83 41.3
18-Sep-24 488 ND 2.5 ND 2.68 40.0
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-30 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(m!/1) (u2'})
19-Jun-13 ND ND ND ND 0.948 36
29-Aug-13 ND ND ND ND 0.952 36.3
7-Nov-13 ND ND ND ND l.24 35.9
23-Jan-14 ND ND ND ND I.36 36
2 l-May-14 ND ND ND ND 1.44 31.99
13-Aug-14 ND ND ND ND 1.5 38
23-Oct-14 ND ND ND ND 1.84 37. l
ll-Mar-15 1.65 ND ND ND 2.15 38.3
l 0-Jun-15 2.25 ND ND ND 1.75 40.3
3-Sep-15 3.27 ND ND ND I.75 44.2
28-Oct-l 5 3.48 ND ND ND 1.86 37.8
17-Mar-16 5.16 ND ND ND 2.74 39.6
26-May-16 7.38 ND ND ND 2.04 40.2
3-Aug-16 6.79 ND ND ND 2.32 38.6
20-Oct-16 8.69 ND ND ND 2.51 41.3
15-Mar-17 13.6 ND ND ND 2.7 37.7
15-Jun-l 7 15.2 ND ND ND 2.95 37.8
3-Aug-17 15.7 ND ND ND 3.11 39.8
10-Oct-17 13.4 ND ND ND 2.58 34.9
15-Mar-l 8 16.4 ND ND ND 3.63 41.0
13-Jun-18 16.9 ND ND ND 3.93 37.4
30-Aug-18 19.8 ND ND ND 3.79 44. l
12-Dec-l 8 23.9 ND ND ND 3.70 35.5
16-Mar-l 9 25.3 ND ND ND 4.08 35.9
13-Jun-19 31.5 ND ND ND 4.13 27.2
11-Sep-19 34.8 ND ND ND 3.62 34.5
18-Dec-19 44.9 ND ND ND 3.62 39.1
17-Mar-20 53.1 ND ND ND 3.85 37.5
12-Jun-20 65.4 ND ND ND 3.69 38.6
l 8-Sep-20 67.7 ND ND ND 3.49 35.0
11-Nov-20 82.8 ND ND ND 3.64 37.1
18-Mar-21 74.8 ND ND ND 3.54 37.6
17-Jun-2 l 78.7 ND ND ND 4.19 38.3
22-Sep-21 78.2 ND ND ND 2.60 23.5
8-Dec-21 81.2 ND ND ND 3.14 37.9
23-Mar-22 73.6 ND ND ND 3.0 35. l
22-Jun-22 70.8 ND ND ND 2.80 41.3
14-Sep-22 69.8 ND ND ND 2.61 30.5
9-Dec-22 60.5 ND ND ND 2.67 36.5
29-Mar-23 45.5 ND ND ND 2.84 36.6
21-Jun-23 47.0 ND ND ND 3.02 36.8
14-Sep-23 47.8 ND ND ND 3.34 36.7
bCblo~~rm C-arbe.-i blor0m,etha n
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12-Dec-23 40.2 ND ND ND 3.16 33.4
14-Mar-24 34.2 ND ND ND 3.21 34.4
13-Jun-24 37.8 ND ND ND 3.53 34.7
18-Sep-24 26.2 ND ND ND 3.37 32.9
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-31 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(.uwl) (u2/l)
19-Jun-13 ND ND ND ND 1.26 28.4
5-Sep-13 ND ND ND ND 1.1 29.4
7-Nov-13 ND ND ND ND 1.33 28
23-Jan-14 ND ND ND ND 1.32 28.5
21-May-14 ND ND ND ND 1.22 26.3
13-Aug-14 ND ND ND ND l. l 30
28-Oct-14 ND ND ND ND 1.23 30
1 l-Mar-15 ND ND ND ND 1.33 30.6
1 0-Jun-15 ND ND ND ND 1.19 31.1
2-Sep-15 ND ND ND ND 0 .916 30.4
2 l-Oct-15 ND ND ND ND 0 .953 29.1
16-Mar-16 ND ND ND ND 1.84 31.5
25-May-16 ND ND ND ND 1.36 32.5
28-Jul-16 ND ND ND ND 1.41 30.6
20-Oct-16 ND ND ND ND 1.14 34.0
15-Mar-17 ND ND ND ND 1.19 31.3
15-Jun-17 ND ND ND ND 1.21 33.4
2-Aug-17 ND ND ND ND 1.11 33.0
I 0-Oct-17 ND ND ND ND 1.04 30.9
14-Mar-l 8 ND ND ND ND 0 .916 38.8
12-Jun-18 ND ND ND ND 0.948 34.4
29-Aug-18 ND ND ND ND 0 .710 40.3
12-Dec-18 ND ND ND ND 0 .766 35 .2
16-Mar-l 9 ND ND ND ND 0.754 35.0
13-Jun-19 ND ND ND ND 0.713 36.9
1 l-Sep-19 ND ND ND ND 0.610 35.8
14-Dec-l 9 ND ND ND ND 0 .583 40.6
l 7-Mar-20 ND ND ND ND 0.572 38.2
l l-Jun-20 ND ND ND ND 0 .569 36.7
17-Sep-20 ND ND ND ND 0 .507 36.5
4-Nov-20 ND ND ND ND 0.501 36.4
17-Mar-21 ND ND ND ND 0.501 40.3
16-Jun-2 l ND ND ND ND 0.451 37.9
l 5-Sep-21 ND ND ND ND 0.461 31.2
8-Dec-21 ND ND ND ND 0.339 40.3
16-Mar-22 ND ND ND ND 0.4 34.8
16-Jun-22 ND ND ND ND 0.41 35.5
13-Sep-22 ND ND ND ND 0.396 40 .0
7-Dec-22 ND ND ND ND 0.410 31.8
23-Mar-23 ND ND ND ND 0.391 35.9
15-Jun-23 ND ND ND ND 0.444 43.1
l 3-Sep-23 ND ND ND ND 0.340 42.4
Cb>lo,ioforn,1 Carbon Chloromethane Methylene Nitrate Chloride TW~1
(~) Tetrachloride-(ug/l) Chloride (mg/I) (mg/I) (u,e/J) fo!!/1)
7-Dec-23 ND ND ND ND 0.390 39.5
13-Mar-24 ND ND ND ND 0.390 39.5
12-Jun-24 ND ND ND ND 0.558 45.4
12-Sep-24 ND ND ND ND 0.520 43.2
Jun-13
Oct-13
Feb-14
Jun-14
Oct-14
Feb-15
Jun-15
Oct-15
Feb-16
Jun-16
Oct-16
Feb-17
Jun-17
Oct-17
Feb-18
Jun-18
Oct-18
Feb-19
Jun-19
Oct-19
Feb-20
Jun-20
Oct-20
Feb -21
Jun-21
Oct-21
Feb-22
Jun-22
Oct-22
Feb-23
Jun-23
Oct-23
Feb-24
Jun-24
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Chloroform Carbon Chlorometbane Methylene Nitrate Chloride TW4-32 Tetrachloride (ug/1)
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14-Nov-13 ND ND ND ND 4.26 52. l
22-Jan-l 4 ND ND ND ND 5 .11 54.5
21-May-14 ND ND ND ND 5.63 54.9
13-Aug-14 ND ND ND ND 4.2 64
23-Oct-l 4 ND ND ND ND 2.14 62.6
l l-Mar-15 ND ND ND ND 2.46 64.2
I 0-Jun-15 ND ND ND ND 1.21 62.7
2-Sep-15 ND ND ND ND 5.09 59 .6
2 l-Oct-15 ND ND ND ND 1.19 55. l
l 5-Mar-16 ND ND ND ND 4.48 64.2
25-May-16 ND ND ND ND 3.16 71.8
28-Jul-16 ND ND ND ND 3.44 64.4
l 9-Oct-16 ND ND ND ND 2.87 66.0
14-Mar-l 7 ND ND ND ND 2.82 62.8
I 5-Jun-17 ND ND ND ND 2.37 53.5
2-Aug-17 ND ND ND ND 2.47 65.8
I 0-Oct-17 ND ND ND ND 2.54 58.3
14-Mar-l 8 ND ND ND ND 2.94 65.4
l 2-Jun-18 ND ND ND ND 2.51 59.2
29 -Aug-l 8 ND ND ND ND 2.56 68.1
30-Nov-l 8 ND ND ND ND 2.50 57.5
16-Mar-19 ND ND ND ND 2.15 57 .5
13-Jun-19 ND ND ND ND 2. I 8 60. I
1 l-Sep-19 ND ND ND ND 1.84 55.0
14-Dec-19 ND ND . ND ND 1.89 64.7
l 7-Mar-20 ND ND ND ND 1.97 59.7
I 0-Jun-20 ND ND ND ND 2.19 57.0
17-Sep-20 ND ND ND ND 1.58 50.8
4-Nov-20 ND ND ND ND 1.74 53.7
17-Mar-21 ND ND ND ND 1.80 60.5
15-Jun-21 ND ND ND ND 2.31 40.4
l 5-Sep-21 ND ND ND ND 1.57 46.1
7-Dec-21 ND ND ND ND 1.34 55.0
16-Mar-22 ND ND ND ND 1.8 48.0
l 5-Jun-22 ND ND ND ND 1.2 49.4
13-Sep-22 ND ND ND ND 1.59 51.8
7-Dec-22 ND ND ND ND 1.68 48.4
23-Mar-23 ND ND ND ND 1.53 43.6
l 5-Jun-23 ND ND ND ND 1.77 49 .3
13-Sep-23 ND ND ND ND 1.63 52.6
6-Dec-23 ND ND ND ND 1.65 38.5
13-Mar-24 ND ND ND ND 1.83 54.4
C hlo roform Carb on C hlorom e th a oe Methyle ne Nitrate C hlo ride
TW'4-32 Tet ..acbloride (ug/1)
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11-J un-24 ND ND ND ND 2.22 53.3
12-Sep-24 ND ND ND ND 1.98 51.1
Nov-13
Feb-14
May-14
Aug-14
Nov-14
Feb-15
May-15
Aug-15
Nov-15
Feb-16
May-16
Aug-16
Nov-16
Feb-17
May-17
Aug-17
Nov-17
Feb-18
May-18
Aug-18
Nov-18
Feb-19
May-19
Aug-19
Nov-19
Feb-20
May-20
Aug-20
Nov-20
Feb-21
May-21
Aug-21
Nov-21
Feb-22
May-22
Aug-22
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May-23
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Nov-23
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Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-33 Tetrachloride (ug/1) (u!Ul) (ug/1) Chloride (ug/1) (mg/I) (mg/I)
14-Nov-13 126 ND ND ND 1.82 47.2
30-Jan-14 124 ND ND ND 2.56 43.5
22-May-14 121 ND ND ND 1.63 46.8
27-Aug-14 104 ND ND ND 1.5 43
29-Oct-14 124 ND ND ND 2.22 44.2
12-Mar-15 134 ND ND ND 1.91 44.2
l l-Jun-15 127 ND ND ND 1.62 46.4
3-Sep-15 123 ND ND ND 1.64 53.4
29-Oct-15 129 ND ND ND 1.92 44.5
17-Mar-16 122 ND ND ND 2.13 46.2
8-Jun-16 96 ND ND ND 2.06 49.7
4-Aug-16 121 ND ND ND 2.32 48.5
26-Oct-l 6 109 ND ND ND 2.36 52.4
l 6-Mar-17 91 ND ND ND 2.11 49.0
20-Jun-17 103 ND ND ND 2.34 49.2
3-Aug-17 127 ND ND ND 2.04 46.9
I I-Oct-I 7 97.1 ND ND ND 2.09 42.5
15-Mar-18 128 ND ND ND 1.94 49.2
13-Jun-18 88 ND ND ND 2.13 44.0'
5-Sep-18 113 ND ND ND 1.82 50.0
13-Dec-l 8 141 ND ND ND 2.01 43.2
20-Mar-19 86.2 ND ND ND 2.00 47.2
19-Jun-l 9 121 ND ND ND 2.16 43.4
12-Sep-19 101 ND ND ND 1.61 41.1
18-Dec-19 117 ND ND ND 1.86 48.8
18-Mar-20 94 ND ND ND 2.44 45.3
12-Jun-20 90 ND ND ND 3.26 48.9
18-Sep-20 85 ND ND ND 3.58 51.0
l l-Nov-20 80.6 ND ND ND 3.71 51.5
18-Mar-2 l 64.9 ND ND ND 4.62 55.6
17-Jun-21 63.9 ND ND ND 6.25 54.7
22-Sep-21 60.2 ND ND ND 4.33 42.5
8-Dec-21 68.9 ND ND ND 4.65 53.8
23-Mar-22 53.1 ND ND ND 3.8 51.4
22-Jun-22 58.7 ND ND ND 3.7 56.7
14-Sep-22 53.9 ND ND ND 3.90 42.2
9-Dec-22 50.5 ND ND ND 3.52 45.1
29-Mar-23 47.7 ND ND ND 3.93 52.6
21-Jun-23 51.8 ND ND ND 4.24 52.9
14-Sep-23 51.3 ND ND ND 4.19 52.0
12-Dec-23 43.4 ND ND ND 4.89 52.6
14-Mar-24 43.3 ND ND ND 4.66 50.1
C hlo ro form Carbo.n Chlorometbane Met bylene Nitra te C hlQrid e TW,4-33 Tetrachlo ride (ug/l), (ul!/H (ug/1) Chloride ( ug/1) (mg/I) (m g/1)
I 3-Jun-24 39.9 ND ND ND 5 .90 53.2
I 8-Sep-24 39.9 ND ND ND 4.93 48.8
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-34 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(:u2/l) (u2'))
14-Nov-13 ND ND ND ND 1.64 19.2
23-Jan-14 ND ND ND ND 1.94 20.4
21-May-14 ND ND ND ND 1.69 17.9
13-Aug-14 ND ND ND ND 1.1 18
28-Oct-14 ND ND ND ND 1. 16 17.5
l l-Mar-15 ND ND ND ND 1.21 17.7
10-Jun-15 ND ND ND ND 0.868 '17.4
3-Sep-15 ND ND ND ND 0.458 15.1
21-Oct-l 5 ND ND ND ND 0.368 15.8
16-Mar-16 ND ND ND ND 0.925 17.3
26-May-16 ND ND ND ND 0.605 18
26-May-l 6 ND ND ND ND 0.605 18
3-Aug-16 ND ND ND ND 0.726 17.2
20-Oct-l 6 ND ND ND ND 0.612 19.0
l 5-Mar-17 ND ND ND ND 0.674 18.0
15-Jun-17 ND ND ND ND 0.727 15.7
2-Aug-17 ND ND ND ND 0.733 19.8
1 0-Oct-17 ND ND ND ND 0.774 18.5
14-Mar-l 8 ND ND ND ND 0.737 19.1
13-Jun-18 ND ND ND ND 0.877 19.5
29-Aug-18 ND ND ND ND 0.736 23.8
12-Dec-l 8 ND ND ND ND 0.889 18.5
16-Mar-19 ND ND ND ND 0.859 17.9
13-Jun-19 ND ND ND ND 0.994 20. l
ll-Sep-19 ND ND ND ND 0.934 17.8
14-Dec-l 9 ND ND ND ND 1.07 21.4
l 7-Mar-20 ND ND ND ND 1.09 20.1
l l-Jun-20 ND ND ND ND 1.24 20.9
l 7-Sep-20 ND ND ND ND 0.978 19.0
4-Nov-20 ND ND ND ND l.04 18.7
17-Mar-2 l ND ND ND ND 10.9 19.3
l 6-Jun-21 ND ND ND ND 1.08 17.8
15-Sep-2 l ND ND ND ND 1.1 15.0
8-Dec-21 ND ND ND ND 1.02 19.6
16-Mar-22 ND ND ND ND 1.0 17.3
16-Jun-22 ND ND ND ND 1.0 19.5
14-Sep-22 I.2 ND ND ND 0.788 18.8
8-Dec-22 ND ND ND ND 1.16 17.0
29-Mar-23 1.2 ND ND ND 1.07 20.7
20-Jun-23 1.2 ND ND ND 1.09 21.2
14-Sep-23 ND ND ND ND 1.27 20.6
7-Dec-23 ND ND ND ND 1.08 16.0
Chloroform Car{IOTI Chlorom thane M tl:cylene Nitrate ChJoride TW4-34 (ug/1) Te-trnchforidc (u.o/1) Chloride (mg/I) (D1P!l) (mi ll) (uum
13-Mar-24 1.1 ND ND ND 1.35 21.1
12-Jun-24 1.4 ND ND ND 1.45 20.3
l 7-Sep-24 ND ND ND ND 1.27 20.6
Nov-13
Mar-14
Jul-14
Nov-14
Mar-15
Jul-15
Nov-15
Mar-16
Jul-16
Nov-16
Mar-17
Jul-17
Nov-17
Mar-18
Jul-18
Nov-18
Mar-19
Jul-19
Nov-19
Mar-20
Jul-20
Nov-20
Mar-21
Jul-21
Nov-21
Mar-22
Jul-22
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Mar-23
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27-Aug-14 ND ND ND ND 0.2 34
28-Oct-14 ND ND ND ND 0.351 34. l
Il-Mar-15 ND ND ND ND 0.436 34.9
I 0-Jun-15 ND ND ND ND 0.452 35.2
3-Sep-15 ND ND ND ND 0.304 35.9
28-Oct-15 ND ND ND ND 0.419 33.4
16-Mar-16 ND ND ND ND 0.521 35.4
26-May-16 ND ND ND ND 0.631 35.4
3-Aug-16 ND ND ND ND 0.723 34.8
20-Oct-l 6 ND ND ND ND 0.626 37.1
l 5-Mar-17 ND ND ND ND 0.673 33.7
15-Jun-17 ND ND ND ND 0.699 34.8
2-Aug-17 ND ND ND ND 0.670 36.3
1 0-Oct-17 ND ND ND ND 0.651 31.7
14-Mar-18 ND ND ND ND 0.740 37.4
13-Jun-18 ND ND ND ND 0.662 33.7
30-Aug-18 ND ND ND ND 0.527 39.3
12-Dec-l 8 ND ND ND ND 0.559 43.0
16-Mar-19 ND ND ND ND 0.574 33.5
13-Jun-19 ND ND ND ND 0.670 35.5
11-Sep-19 ND ND ND ND 0.525 31.7
14-Dec-19 ND ND ND ND 0.524 37.4
17-Mar-20 ND ND ND ND 0.595 34.5
l 1-Jun-20 ND ND ND ND 0.699 34.0
l 7-Sep-20 ND ND ND ND 0.760 32.2
4-Nov-20 ND ND ND ND 0.756 30.4
17-Mar-21 ND ND ND ND 0.991 35.6
16-Jun-21 ND ND ND ND 1.01 34.1
I 5-Sep-21 ND ND ND ND 1.20 27.5
8-Dec-21 ND ND ND ND 1.23 34.3
22-Mar-22 ND ND ND ND 1.5 27.8
16-Jun-22 ND ND ND ND 1.6 31.2
14-Sep-22 ND ND ND ND 1.61 34.4
7-Dec-22 ND ND ND ND 1.79 27.4
29-Mar-23 ND ND ND ND 1.74 33.8
20-Jun-23 ND ND ND ND 1.91 29.8
13-Sep-23 1.4 ND ND ND 2.00 32.4
7-Dec-23 1.4 ND ND ND 1.61 25.0
I 3-Mar-24 1.9 ND ND ND 2.13 34.3
12-Jun-24 2.2 ND ND ND 2.16 29.2
17-Sep-24 3.7 ND ND ND 2.02 32.8
Aug-14
Nov-14
Feb-15
May-15
Aug-15
Nov-15
Feb-16
May-16
Aug-16
Nov-16
Feb-17
May-17
Aug-17
Nov-17
Feb-18
May-18
Aug-18
Nov-18
Feb-19
May-19
Aug-19
Nov-19
Feb-20
May-20
Aug-20
Nov-20
Feb-21
May-21
Aug-21
Nov-21
Feb-22
May-22
Aug-22
Nov-22
Feb-23
May-23
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27-Aug-14 ND ND ND ND ND 65
23-Oct-14 ND ND ND ND ND 67.3
l l-Mar-15 ND ND ND ND ND 67.2
10-Jun-15 ND ND ND ND ND 69.3
3-Sep-15 ND ND ND ND ND 76.4
21 -Oct-15 ND ND ND ND ND 64.5
16-Mar-16 ND ND ND ND ND 67.1
25-May-16 ND ND ND ND N D 72 .3
2 7-Jul-16 ND ND ND ND ND 69.4
20-Oct-16 ND ND ND ND ND 73.8
15-Mar-l 7 ND ND ND ND ND 60 .2
15-Jun-17 ND ND ND ND ND 71.3
2-Aug-17 ND ND ND ND ND 69 .6
I 0-Oct-17 ND ND ND ND 0. 104 62 .9
14-Mar-l 8 ND ND ND ND ND 73.8
I 2-Jun-18 ND ND ND ND ND 64 .3
29-Aug-18 ND ND ND ND ND 76.4
12-Dec-18 ND ND ND ND 0.123 65.8
l 6-Mar-19 ND ND ND ND 0.116 65.0
13-Jun-l 9 ND ND ND ND ND 7 1.5
I l-Sep-19 ND ND ND ND ND 69.6
14-Dec-l 9 ND ND ND ND ND 73.7
l 7-Mar-20 ND ND ND ND ND 69.1
l l-Jun-20 ND ND ND ND ND 67.0
l 7-Sep-20 ND ND ND ND ND 66.0
4-Nov-20 ND ND ND ND ND 64.0
17-Mar-2 l ND ND ND ND ND 72.5
16-Jun-2 l ND ND ND ND ND 68.7
l 5-Sep-21 ND ND ND ND ND 63 .1
8-Dec-21 ND ND ND ND ND 69.9
16-Mar-22 ND ND ND ND 0.1 61.2
15-Jun-22 ND ND ND ND ND 68.8
l 3-Sep-22 ND ND ND ND ND 69.3
7-Dec-22 ND ND ND ND 0.100 59.7
23-Mar-23 ND ND ND ND 0.102 60.7
15-Jun-23 ND ND ND ND ND 68 .9
13-Sep-23 ND ND ND ND 0.140 67.3
6-Dec-23 ND ND ND ND ND 45 .5
13-Mar-24 ND ND ND ND 0.140 68.6
12-Jun-24 ND ND ND ND 0. T47 69 .5
12-Sep-24 ND ND ND ND 0.210 66.6
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Nov-1
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May-1
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Nov-1
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May-1
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May-1
Aug-18
Nov-18
Feb-19
May-19
Aug-19
Nov-19
Feb-20
May-20
Aug-20
Nov-20
Feb-21
May-21
Aug-21
Nov-21
Feb-22
May-22
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8-Jun-15 30200 18 16 2 35 345
31-Aug-15 19100 17 14 1.04 32 374
19-Oct-15 19500 13 9 1.17 35 399
9-Mar-16 17500 16 4 1.34 28.4 332
23-May-16 16200 14 ND 1.17 27.9 389
25-Jul-16 15900 17 ND ND 33.4 294
12-Oct-16 16400 16 ND ND 26.1 304
8-Mar-17 18000 15 ND ND 32.3 305
13-Jun-17 15800 16 ND ND 31.2 281
26-Jul-17 15000 15.1 ND ND 30.5 277
11-Oct-17 15500 12.6 2.47 ND 30.6 255
12-Mar-18 12900 12.8 1.14 ND 30.0 263
8-Jun-18 14400 10.6 ND ND 28.6 275
22-Aug-18 14100 12.1 6.20 ND 25.4 387
28-Nov-l 8 15200 11.3 19.8 ND 27.3 264
8-Mar-19 13300 13.8 1.2 ND 30.1 209
5-Jun-19 16200 14.6 ND ND 31.2 250
4-Sep-19 11900 10.7 1.90 ND 25.8 228
1 0-Dec-19 13100 8.8 3.12 ND 25.5 220
19-Feb-20 12000 8.5 12.30 ND 28.3 236
27-May-20 11700 11.8 1.44 ND 28.3 321
4-Sep-20 13800 9.6 ND ND 29.5 273
28-Oct-20 10300 6.5 29.40 ND 28.7 254
23-Feb-2 l 9380 ND ND ND 26.9 242
9-Jun-21 13000 8.46 I.98 ND 26.6 176
24-Aug-21 10200 7.65 ND ND 25.8 220
l-Dec-21 14800 11.50 6.70 5.05 31.3 410
9-Mar-22 13700 12.20 ND ND 29.8 414
8-Jun-22 46800 8.2 12.0 ND 28 267
30-Aug-22 11600 504 2.4 ND 26.6 243
30-Nov-22 9640 5.7 ND ND 30.9 578
7-Mar-23 8010 ~D ND ND 19.1 209
13-Jun-23 8160 1.6 5.7 ND 35.9 329
9-Aug-23 9620 3.2 ND ND 25.1 252
29-Nov-23 14000 4.7 14.5 1.40 26.2 199
2 l-Feb-24 8860 7.9 1.0 ND 33.9 363
29-May-24 13500 7.6 ND ND 22.2 208
20-Aug-24 10300 7.6 1.6 ND 34.2 202
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-38 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (u2/I) (uf!/1) -
l 0-Nov-16 ND ND ND ND 11.2 40.0
15-Mar-I 7 ND ND ND ND 10.6 35.7
15-Jun-17 ND ND ND ND 10.8 362
2-Aug-17 ND ND ND ND 10.1 36.9
1 0-Oct-17 ND ND ND ND 10.3 31.3
14-Mar-18 ND ND ND ND 9.34 36 .5
l 3-Jun-18 ND ND ND ND 9.48 33.1
30-Aug-l 8 ND ND ND ND 7.77 39.2
12-Dec-l 8 ND ND ND ND 8.48 35.0
l 6-Mar-19 ND ND ND ND 8.96 33.5
13-Jun-19 ND ND ND ND 8.53 33.7
1 l-Sep-19 ND ND ND ND 7.61 31.6
14-Dec-l 9 ND ND ND ND 7.51 36.0
l 7-Mar-20 ND ND ND ND 8.11 33.4
l l-Jun-20 ND ND ND ND 9.00 34.9
18-Sep-20 ND ND ND ND 7.35 34.7
4-Nov-20 ND ND ND ND 7.72 35.1
18-Mar-21 ND ND ND ND 8.24 37.2
l 6-Jun-21 ND ND ND ND 9.59 37.7
15-Sep-2 l ND ND ND ND 8.04 32.1
8-Dec-21 ND ND ND ND 8 .02 35.8
22-Mar-22 ND ND ND ND 7.7 32.7
l 6-Jun-22 ND ND ND ND 7.9 37.3
l 4-Sep-22 ND ND ND ND 7.57 32.9
7-Dec-22 ND ND ND ND 8.90 36.4
29-Mar-23 ND ND ND ND 8.78 37.2
20-Jun-23 ND ND ND ND 8.20 36.3
13-Sep-23 ND ND ND ND 8.18 41. l
7-Dec-23 ND ND ND ND 8.19 34.3
13-Mar-24 ND ND ND ND 8.61 41.7
12-Jun-24 ND ND ND ND 9.32 44.1
l 7-Sep-24 ND ND ND ND 8.07 43.6
Nov-16
Feb-17
May-17
Aug-17
Nov-17
Feb-18
May-18
Aug-18
Nov-18
Feb-19
May-19
Aug-19
Nov-19
Feb-20
May-20
Aug-20
Nov-20
Feb-21
May-21
Aug-21
Nov-21
Feb-22
May-22
Aug-22
Nov-22
Feb-23
May-23
Aug-23
Nov-23
Feb-24
May-24
Aug-24
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Chloroform Carbon Cbloromethane Methylene Nitrate Chloride TW4-39 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) (ue:/1) (u.e:/1)
l 0-Nov-16 2800 ND ND ND 20.7 68.9
8-Mar-17 6460 8.15 ND 1.35 6.44 130
13-Jun-17 5560 8.20 ND 1.31 6.25 120
26-Jul-l 7 10000 14.40 ND 1.50 7.74 132
11-Oct-17 552 ND ND ND 2.65 73.5
l 2-Mar-18 2870 3.10 ND ND 3.33 118
8-Jun-18 7160 7.94 ND ND 4.84 107
22-Aug-18 8180 12.50 2.33 ND 6.05 110
28-Nov-18 6520 6.08 ND ND 6.39 123
8-Mar-19 885 1.20 ND ND 2.08 49.0
5-Jun-19 8640 11.60 ND ND 8.45 114.0
4-Sep-19 4240 5.71 ND ND 1.75 48.2
1 0-Dec-19 1650 1.14 ND ND 0.948 74.7
I 9-Feb-20 812 ND ND ND 0.792 76.5
27-May-20 5870 7.56 ND ND 5.01 88.5
4-Sep-20 5960 8.18 ND ND 2.69 63.2
28-Oct-20 648 ND I. 19 ND 7.03 83.2
23-Feb-21 2970 ND ND ND 2.12 53.0
9-Jun-21 2490 2.92 ND ND 12.0 123.0
24-Aug-21 858 ND ND ND 2.70 78.7
l-Dec-21 776 ND ND ND 2.33 82.4
9-Mar-22 724 ND ND ND 2.9 75.2
8-Jun-22 982 ND 1.4 ND 9.0 76.8
30-Aug-22 843 ND ND ND 3.72 85.2
30-Nov-22 1720 1.20 ND ND 7.86 80.6
7-Mar-23 1850 ND ND ND I.37 38.7
l 3-Jun-23 3330 1.8 3.1 ND 7.96 75.4
9-Aug-23 3440 2.8 ND ND 5.01 95.5
29-Nov-23 1200 I.I 4.8 ND 2.74 74.0
21-Feb-24 893 1.l ND ND 3.80 98.6
29-May-24 4380 2.6 ND ND 4.22 84.9
20-Aug-24 866 ND ND ND 6.05 87.5
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-40 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I) luIDI) lui!/l)
21-Mar-18 248 ND ND ND 3.08 35.7
14-Jun-18 131 ND ND ND 3.33 31.6
5-Sep-18 116 ND ND ND 3.22 37.6
13-Dec-l 8 118 ND ND ND 3.54 29.9
20-Mar-19 111 ND ND ND 3.18 30.9
5-Jun-19 263 ND ND ND 3.55 35.6
4-Sep-19 380 ND ND ND 3.39 35.9
l 0-Dec-19 314 ND ND ND 2.89 36.7
l 9-Feb-20 364 ND ND ND 2.98 38.5
27-May-20 367 ND ND ND 2.91 36.5
4-Sep-20 333 ND ND ND 2.88 34.2
28-Oct-20 264 ND ND ND 2.58 34.6
23-Feb-2 l 436 ND 3.5 I ND 2.43 36.0
9-Jun-21 343 ND ND ND 3.77 27.5
24-Aug-2 l 301 ND 1.32 ND 1.50 31.8
1-Dec-21 286 ND ND ND 2.60 38.4
9-Mar-22 238 ND ND ND 2.5 38.4
8-Jun-22 323 ND ND ND 1.9 36.6
30-Aug-22 302 ND ND ND 2.22 39.3
30-Nov-22 298 ND ND ND 2.24 44.8
7-Mar-23 259 ND ND ND 1.28 23.5
13-Jun-23 220 ND 1.3 ND 2.04 37.6
9-Aug-23 220 ND ND ND 1.88 39.7
29-Nov-23 402 ND 2.1 2 2.09 38.1
21-Feb-24 187 ND ND ND 2.02 39.6
29-May-24 393 ND ND ND 1.86 39.8
20-Aug-24 232 ND ND ND 1.98 34.6
Chloroform Carbon Chloromethane Methylene Chloride TW4-41 (ug/1) Tetrachloride (ug/1) Chloride Nitrate (mg/I) (mg/I)
(ue:ll) .(ue:/1)
9-May-18 1400 ND ND ND 6.54 42.8
22-Aug-l 8 1390 ND ND ND 6.13 45.5
28-Nov-l 8 1320 ND ND ND 6.02 41.4
8-Mar-19 1220 ND ND ND 6.71 39.l
5-Jun-19 1320 ND ND ND 6.00 38.9
4-Sep-19 1190 ND ND ND 6.22 39.4
1 0-Dec-19 1410 ND ND ND 6.11 42.1
l 9-Feb-20 1200 ND ND ND 6. 12 44.4
27-May-20 1220 ND ND ND 6.78 41.7
4-Sep-20 1110 ND ND ND 6.69 40.2
28-Oct-20 1020 ND ND ND 6.25 39.7
23-Feb-2 l I 170 ND ND ND 6.41 40.6
9-Jun-21 1130 ND ND ND 7.45 39.3
24-Aug-21 1100 ND ND ND 3.77 37.1
l-Dec-21 1030 ND ND ND 6.72 43.2
9-Mar-22 1030 ND ND ND 6.2 37.3
8-Jun-22 1010 ND ND ND 6.0 41.1
30-Aug-22 1060 ND ND ND 5.92 41.9
30-Nov-22 TOSO ND ND ND 6.00 38.0
7-Mar-23 985 ND ND ·ND 4.30 34.4
13-Jun-23 1040 ND 1.8 ND 6.27 40.3
9-Aug-23 1050 ND ND ND 5.59 41.0
29-Nov-23 1580 ND 7 ND 5.78 43.3
21-Feb-24 913 ND ND ND 6:01 41.4
29-May-24 1660 ND ND ND 5.83 41.4
20-Aug-24 1200 ND ND ND 6.12 36.7
Chloroform Carbon Chloromethane Methylene Nitrate Chloride TW4-42 (ug/1) Tetrachloride (ug/1) Chloride (mg/I) (mg/I)
(u~/1) (u~/1)
l 9-Jun-19 ND ND ND ND 2.57 23.3
11-Sep-19 ND ND ND ND 2.75 20.6
12-Dec-19 ND ND ND ND 2.82 22.6
17-Mar-20 ND ND ND ND 2.88 23.2
10-Jun-20 ND ND ND ND 3.23 23.1
17-Sep-20 ND ND ND ND 3.65 23.5
4-Nov-20 ND ND ND ND 2.77 22.4
17-Mar-21 ND ND ND ND 3.15 24.2
15-Jun-21 ND ND ND ND 3.57 24.6
15-Sep-21 ND ND ND ND 3.26 16.6
7-Dec-21 ND ND ND ND 2.02 24.2
15-Mar-22 ND ND ND ND 2.5 21.5
1-S-Jun-22 ND ND ND ND 3.3 24.0
30-Aug-22 ND ND ND ND 3.03 22.8
7-Dec-22 ND ND ND ND 3.30 15.6
22-Mar-23 ND ND ND ND 2.78 21. l
15-Jun-23 ND ND ND ND 3.14 20.9
l 3-Sep-23 ND ND ND ND 3.33 20.4
6-Dec-23 ND ND ND ND 2.49 16.5
13-Mar-24 ND ND ND ND 3.51 24.4
29-May-24 ND ND ND ND 3.52 23.5
l 2-Sep-24 ND ND ND ND 3.56 22.8
Chloroform Carbon Chloromethane Methylene Chloride TW4-43 (og/1) Tetrachloride (og/1) Chloride Nitrate (mg/I) (mg/I)
(02/1) (02/1)
9-Dec-21 ND ND ND ND 0.118 40.6
16-Mar-22 ND ND ND ND 0.4 39.2
16-Jun-22 ND ND ND ND 0.24 41.8
13-Sep-22 ND ND ND ND 0.383 43.1
7-Dec-22 ND ND ND ND 0.383 40.7
23-Mar-23 ND ND ND ND 0.384 28.0
15-Jun-23 ND ND ND ND 0.432 41.7
13-Sep-23 ND ND ND ND 0.410 35.2
7-Dec-23 ND ND ND ND 0.450 41.1
13-Mar-24 ND ND ND ND 0.530 41.7
12-Jun-24 ND ND ND ND 0.561 42.3
17-Sep-24 ND ND ND ND 0.546 41.3
TabL
Contour Map Based Chloroform Plume Mass Calculations and Data over Time
CHLOROFORM RESIDUAL MASS ESTIMATE DETAILS:
Chloroform Data File: CHL_Surferlnput_3Q_24.xls
Gridding details:
1) kriging parameters: SURFER™ default parameters (point kriging, linear
variogram, slope= 1, no anisotropy [anisotropy= 1], no search constraints [all data
used])
2) minx, max x (UTME[m]): 631900, 633043
3) min y, max y (UTMN[m]): 4154240, 4155550.64
4) grid spacing in x, y (m): 15.24, 15.24
5) artificial or pseudo-data: none
6) Q2, 2024 (previous quarter) data used at wells: MW-1, MW-2, MW-3A, MW-5,
MW-12, MW-15, MW-17 through MW-20, MW-22, MW-24, MW-27 through
MW-29, MW-35, MW-37 (all non-detect).
Chloroform residual mass estimate kriged grid files {ascii format):
Ucm3Q24wl.grd: third quarter, 2024 Water Level Grid (ft amsl)
Ucm3Q24bb.grd: third quarter, 2024 Aquifer Base Grid (ft amsl)
Ucm3Q24sat.grd: third quarter, 2024 Saturated Thickness Grid (ft)
Ucm3Q24logchl.grd: third quarter, 2024 log of chloroform grid (log of ug/L)
Ucm3Q24chl.grd: third quarter, 2024 Chloroform Concentration Grid (ug/L)
Ucm3Q24ge70.grd: third quarter, 2024 Chloroform Concentration GE 70 Grid (ug/L)
Ucm3Q24volm3.grd: third quarter, 2024 Groundwater Volume Grid (m3)
Ucm3Q24masslb.grd: third quarter, 2024 Chloroform Plume Mass Grid (lb)
Chloroform residual mass estimate kriged grid XYZ files {ascii format):
Ucm3Q24wl.dat: third quarter, 2024 Water Level Grid XYZ file (ft amsl)
Ucm3Q24bb.dat: third quarter, 2024 top of Aquifer Base Grid XYZ file (ft amsl)
Ucm3Q24sat.dat: third quarter, 2024 Saturated Thickness Grid XYZ file (ft)
Ucm3Q24logchl.dat: third quarter, 2024 log of chloroform grid XYZ file (log ofug/L)
Ucm3Q24chl.dat: third quarter, 2024 Chloroform Concentration Grid XYZ file (ug/L)
Ucm3Q24ge70.dat: third quarter, 2024 Chloroform Concentration GE 70 Grid (ug/L)
XYZ file
Ucm3Q24volm3.dat: third quarter, 2024 Groundwater Volume Grid XYZ file (m3)
Ucm3Q24masslb.dat: third quarter, 2024 Chloroform Plume Mass Grid XYZ file (lb)
Chloroform plume mass estimate fiJe: Ucm3Q24_result.xls
TABLE L.1
Chloroform Plume Residual Mass
Since Third Quarter 2015
Residual
Plume Mass
Quarter (lbs)
Q315 1712
Q415 1869
Q116 1946
Q216 2261
Q316 1718
0416 1711
0117 1271
0217 1372
0317 1948
0417 884
0118 1271
0218 1271
0318 1208
Q418 1107
0119 833
0219 1408
0319 1050
Q419 770
Q1 20 1106
0220 1056
0320 909
0420 715
01 21 1273
02 21 784
Q3 21 933
04 21 981
01 22 711
02 22 1124
Q322 850
Q422 893
Q1 23 444
Q2 23 928
Q323 663
Q423 845
Q1 24 461
Q224 965
Q324 511
Notes:
lbs= pounds
https://hgci nc.sha re point. com/VO L4/718000/n ov24/ ch loroform/massca lc/F L.1 _resid _ ch I_ mass_ 3 Q24.xlsx: Table L.1
TabM
CSV Transmittal Letter
Jordan Christine App
From:
Sent:
To:
Cc:
Subject:
Attachments:
Dear Mr. Wingate,
Jordan Christine App
Tuesday, November 19, 2024 8:36 AM
[e-mail]
Dean Henderson ([e-mail]); [e-mail]; David Frydenlund; Scott
Bakken; Logan Shumway; Kathy Weinel
Transmittal of CSV Files White Mesa Mill 2024 Q3 Chloroform Monitoring
24H2049 Final EnergyFuels-Client 08 Oct 24 1040 .csv; 2411050 FINAL EnergyFuels-Client
25 Sep 24 1616.csv; 2411623 Amended EnergyFuels-Client 03 Oct 24 1343 .csv; Q3 2024
Chloroform Field Data.csv; Q3 2024 DTW all programs -EIM .csv; 2411623 Amended
EnergyFuels-Client 03 Oct 24 1343.xls
Attached to this e-mail is an electronic copy of laboratory results for chloroform monitoring conducted at the
White Mesa Mill during the third quarter of 2024, in Comma Separated Value (CSV) format.
Other electronic files required by the Corrective Action Plan are included on the CDs included with the hard copy
reports.
Please contact me at 303-389-4131 if you have any questions on this transmittal.
Yours Truly,
Jordan
eF Energy Fuels Resources (USA) Inc.
Jordan Christine App
Environmental Scientist
t:303-389-4131 I c:714-718-4610 I f :303.389.4125
[e-mail]
225 Un ion Blvd ., Suite 600
Lakewood, CO 80228
http://www.energyfuels.com
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 it 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
TabN
Exceedance Notices for the Reporting Period