DERR-2024-012448

Groundwater Monitoring Report
October 24, 2024
Top Stop C-32
1095 Medical Drive,
Brigham City, Utah 84302

DERR Facility ID: 0100569
Release Site: NLX

Prepared by:
Pure Enviro Management LLC
Prepared for:
Jim Larson
Wind River Petroleum,
5097 South 900 East
Salt Lake City, Utah 8107
And;
Hillary Mason, Project Manager
Utah Division of Environmental Response and Remediation
195 North 1950 West
P.O. Box 144840
Salt Lake City, Utah 84114-4840

Submitted:
November 19,
2024

1594 South 1300 East, Spanish Fork, UT 84660 [phone] www.pureenviro.com
Groundwater Monitoring Report – October 24, 2024
Top Stop C-32
Facility ID: 0100569
Release Site: NLX
2

TABLE OF CONTENTS
Page
Table of Contents ...................................................................................................................... 2
1.0 EXECUTIVE SUMMARY .............................................................................................................. 3
2.0 INTRODUCTION ........................................................................................................................ 3
3.0 BACKGROUND .......................................................................................................................... 4
4.0 GROUNDWATER SAMPLING METHODOLOGY ........................................................................... 4
5.0 RESULTS
5.1 Groundwater Depths and Contours ............................................................................. 5
5.2 Groundwater Sample Results ........................................................................................5
6.0 CONCLUSIONS AND RECOMMENDATIONS ................................................................................. 5
7.0 LIMITATIONS ............................................................................................................................. 6
8.0 REFERENCES .............................................................................................................................. 7
APPENDICIES
Appendix A Figure 1 – Site Map
Figure 2 – Site Map with Groundwater Contours
Appendix B Table 1 – Soil Sampling Results
Table 2 – Groundwater Analytical Results Summary
Table 3 – Groundwater Elevations and Top of Casing
Appendix C AWAL Results, Sampling Field Logs and Field Report
Groundwater Monitoring Report – October 24, 2024
Top Stop C-32
Facility ID: 0100569
Release Site: NLX
3

01 EXECUTIVE SUMMARY
Pure Enviro Management, LLC (PEM) has been retained by Wind River Petroleum doing business as (dba)
Top Stop Convenience Stores, to perform twice yearly groundwater sampling as approved in the
Corrective Action Plan (CAP) submitted to the Division of Environmental Response and Remediation. The
facility is located at Top Stop Store #C-32, 1095 Medical Drive, Brigham City, Utah, which includes a
retail gasoline service station, retail C-store, and a car wash. The site is covered by Wind River Petroleum
under private insurance.
This report summarizes the results of a Groundwater Monitoring performed during October 24, 2024.
Based on field observations and the analytical results obtained of soil and groundwater samples taken,
the following conclusions are presented:
• On October 24, 2024, groundwater levels represent mostly an increased in depth since
the last round of sampling on May 16, 2024, by about 1.50 to 1.73 feet increased depth
over the prior sampling.

• Laboratory results from October 24, 2024, sampling event of the ten sampled wells indicate the
analysis for the monitoring wells MW-1 through 10, shows all COC are now below detection
limits, except for MW-9 for 0.015 mg/L of Benzene. MW-9 indicates that soil washing from a
recent minor gasoline spill near the Tanks is above the ISL’s for Benzene, but below the RBCA
Tier 1 screening levels for an on-site active gas station.

• This groundwater sampling report will be considered the second of the twice-year sampling of
2024. The next groundwater sampling event should be about April 2025, under the approved
CAP.

• Nine of Ten monitoring wells were below detection limits except for MW-9 for 0.015 mg/L of
Benzene. This is the third set of sample results showing non-detect levels near the release
source on this site, indicating to me even the soils have been sufficiently naturally attenuated.
In my professional opinion, this site should now be eligible for site closure as there is only 5-6
feet of soil above groundwater, and on an active gasoline station that will always have some
minor releases.

• However, if the State chooses, we can continue with the protocol to confirm soil contamination
level with soil borings. This, however, increases the likelihood of accidentally hitting one of the
double-walled Flexible Plastic piping creating a new release on an active station.

02 INTRODUCTION
The site Facility Identification number 0100569, as assigned by the State of Utah, DEQ, DERR, is located
at 1095 Medical Drive, which is also known as (aka) 1095 South 500 West in the Box Elder County
Groundwater Monitoring Report – October 24, 2024
Top Stop C-32
Facility ID: 0100569
Release Site: NLX
4

Records, Brigham City, Utah. The Leaking Underground Storage Tank identification number assigned to
the site is NLX. Pure Enviro Management, LLC (PEM) was retained by Wind River Petroleum to provide
Utah Certified Environmental Consulting and to obtain representative samples of the groundwater.

03 BACKGROUND
Appendix A: Figure 1 – Existing Conditions/Site Plan with a vicinity map insert in Appendix A, was
developed, elevations logged, and all points surveyed within the site by David Johnson, a Utah
Professional Land Surveyor (PLS) and Professional Engineer (PE) during preparation of the Subsurface
Investigation Report or about, November 2, 2017, and the Additional Subsurface Investigation Report on
or about October 15, 2018, by PEM. All land use, work completed, site maps, monitoring well
installation, lithology, and nature of the release are contained in those reports.
The goal is to determine the extent of groundwater contamination with time and variation with
groundwater levels under the Corrective Action Plan (CAP) approved using Monitored Natural
Attenuation (MNA) as approved on January 15, 2021. The site was constantly on the Utah Petroleum
Storage Tank (PST) Fund from date of installation, until Wind River Petroleum opted off the PST fund on
January 25, 2016. Wind River Petroleum lapsed their rights to claim against the PST fund six months
after opting off the PST fund. The work performed to upgrade the site occurred after this date.
04 GROUNDWATER SAMPLING METHODOLOGY
The ten monitoring wells were all located and intact since the last sampled on May 17, 2023. The
groundwater monitoring event for the ten monitoring wells was conducted on October 24, 2024, and
considered the second twice yearly sampling for 2024. This sampling is to monitor how the COC
variation with time affects the sampling results. The Certified Sampler is William Moore (GS-62) assisted
by Technicians in training Matthew Hinck, Brady McBride, and Vili Wolfgram, in order to train personnel
and perform the sampling within one day. The Certified Sampler purged and collected groundwater
samples from all ten monitoring wells. The samples were obtained using standard groundwater
sampling procedures and in OSHA Safety Level D. A complete field log and field measurements are
included in Appendix C.

Depth to groundwater measurements were obtained from each monitoring well using a Heron water
level indicator that was decontaminated between wells. Greater than three casing volumes of
groundwater were calculated and purged from each well, using a Geosub 2 submersible pump on all
wells measuring by gauged bucket, and sampling. The purge water was spread to the surface of the
property from which it came, for evaporation. Refer to attached Water Sampling Records.

The ten (10) monitoring well’s groundwater samples were obtained with Geosub 2 submersible pump
and retained in laboratory supplied 40 ml glass vials labeled appropriately and placed on ice
immediately, and in custody until delivered to the ChemTec Ford Laboratories (CTFL) on October 24,
2024, within about 2 hours of completion of sampling. The 40 ml glass vials of groundwater samples
Groundwater Monitoring Report – October 24, 2024
Top Stop C-32
Facility ID: 0100569
Release Site: NLX
5

were analyzed by CTFL for MTBE, benzene, toluene, ethylbenzene, xylene, naphthalene (MBTEXN), total
petroleum hydrocarbons - gasoline range organics (TPH GRO C6-C10) using EPA methods 8260D and
were analyzed for TPH-DRO using EPA method 8015D from the same vials. CTFL is certified to perform
both analysis from the same vials fixed with Hydrochloric acid to the required detection limits.

5.0 RESULTS
5.1 Groundwater Depths and Contours
The groundwater depths in Appendix B: Table 3 Groundwater Elevations and Top of Casing Table, show
the groundwater levels on the groundwater levels on the southern and western edges of the property
are about 5.06 at MW-5 and 5.82 at MW-3 feet in depth but vary to as much as 6.68 at MW-2 feet
below ground surface (bgs) to the east elsewhere on site. This represents groundwater levels mostly
increased in depth since the last round of sampling on May 16, 2024, by about 1.50 to 1.73 feet
increased depth over prior sampling. This is probably due to the natural seasonal fluctuations. In
addition, MW-10 across Medical Drive is 2.2 feet deeper than the last sampling event.
Appendix A.: Figure 2 shows the groundwater contours for this second bi-yearly sampling of 2024. The
groundwater flow direction for all ten monitoring wells shows a general westerly direction from the
east, with a northerly component for this 2024 round of sampling.

5.2 Groundwater Sample Results
Laboratory results from October 24, 2024, sampling event of the ten sampled wells indicate nine of ten
of the analysis for the monitoring wells MW-1 through 10, shows all COC are now below detection
limits, with exception of except for MW-9 for 0.015 mg/L of Benzene. MW-9 indicates soil washing from
a recent minor spill of gasoline near the Tanks that Benzene is above the ISL’s, but below the RBCA Tier
1 screening levels for an on-site active gas station. This is the third round of sampling that shows non-
detect levels near the release site.
The sample results are summarized in Appendix B: Table 2 Groundwater Analytical Results Summary.
6.0 CONCLUSIONS AND RECOMMENDATIONS
Based on the groundwater sampling results and other observations obtained during the October 24, 2024,
Groundwater Sampling event, the following conclusions are presented.
Groundwater Monitoring Report – October 24, 2024
Top Stop C-32
Facility ID: 0100569
Release Site: NLX
6

• On October 24, 2024, groundwater levels represent mostly an increased in depth since
the last round of sampling on May 16, 202 4, by about 1.50 to 1.73 feet increased depth
over the prior sampling.

• Laboratory results from October 24, 2024, sampling event of the ten sampled wells indicate the
analysis for the monitoring wells MW-1 through 10, shows all COC are now below detection
limits, except for MW-9 for 0.015 mg/L of Benzene. MW-9 indicates that soil washing from a
recent minor gasoline spill near the Tanks is above the ISL’s for Benzene, but below the RBCA
Tier 1 screening levels for an on-site active gas station.

• This groundwater sampling report will be considered the second of the twice-year sampling of
2024. The next groundwater sampling event should be about April 2025, under the approved
CAP.

• Nine of Ten monitoring wells were below detection limits except for MW-9 for 0.015 mg/L of
Benzene. This is the third set of sample results showing non-detect levels near the release
source on this site, indicating to me even the soils have been sufficiently naturally attenuated.
In my professional opinion, this site should now be eligible for site closure as there is only 5-6
feet of soil above groundwater, and on an active gasoline station that will always have some
minor releases.

• However, if the State chooses, we can continue with the protocol to confirm soil contamination
level with soil borings. This, however, increases the likelihood of accidentally hitting one of the
double-walled Flexible Plastic piping creating a new release on an active station.

7.0 LIMITATIONS
Our services consist of professional opinions from a state-certified consultant made in general in
accordance with locally accepted environmental practices at the time of execution. Environmental
samples are obtained from specific locations utilizing methodologies consistent with Utah Department
of Environmental Quality regulations. PEM makes no guarantee either expressed or implied that the
analytical results accurately represent subsurface conditions throughout the entire site.

Sincerely,
Pure Enviro Management, LLC

William Moore, P.G.
UST Certified Consultant CC-252
Attachments
Groundwater Monitoring Report – October 24, 2024
Top Stop C-32
Facility ID: 0100569
Release Site: NLX
7

8.0 REFERENCES

Rockwell Solutions, Closure Notice for dispensers and piping, 0100569 NLX, Top Stop C-32,
December 2016 1095 Medical Dr., Brigham City, UT, September 9, 2016
PEM March 2017 Soil Boring Report on March 3, 2017, March 2017, by PEM
PEM November 2017 Subsurface Investigation Report, November 2, 2017, by PEM
PEM October 2018 Additional Subsurface Investigation Report, October 19, 2018, by PEM
PEM August 2019 Groundwater Monitoring Report, August 14, 2019, by PEM
PEM September 2019 CAP Submittal, September 3, 2019, by PEM

PEM November 2019 Groundwater Monitoring Report, November 7, 2019, by PEM
PEM May 2020 Groundwater Monitoring Report, April 2, 2020, by PEM
PEM November 2020 CAP Re-Submittal, November 5, 2020, by PEM
January 2021 CAP Approval, January 15, 2021, by Utah DERR
PEM April 2021 Groundwater Monitoring Report, April 29, 2021, by PEM

PEM October 2021 Groundwater Monitoring Report, November 19, 2021, by PEM
PEM April 2022 Groundwater Monitoring Report, April 27, 2022, by PEM
PEM October 2022 Groundwater Monitoring Report, October 27, 2022, by PEM
PEM May 2023 Groundwater Monitoring Report, May 17, 2023, by PEM
PEM October 2023 Groundwater Monitoring Report October 24, 2023, by PEM
PEM May 2024 Groundwater Monitoring Report May 16, 2024, by PEM

Groundwater Monitoring Report – October 24, 2024
Top Stop C-32
Facility ID: 0100569
Release Site: NLX

Appendix A
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MW TOC 01
4277.29
MW TOC 02
4277.47
MW TOC 03
4277.13
MW TOC 04
4277.16
MW TOC 05
4277.14
MW TOC 06
4277.19
MW TOC 07
4277.45
MW TOC 10
4276.24
MW TOC 09
4277.48
MW TOC 08
4277.53
GROUNDWATER ELEV.
PNT #
171023806
171023807
171023808
171023809
171023810
171023811
171023812
180915296
180915291
180915289
N
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10016.66
10042.33
10008.38
9946.43
10023.41
9996.58
9938.98
9917.77
10021.25
E
10091.86
10126.12
10021.69
10008.35
9993.80
10038.18
10108.07
10125.30
10047.19
9896.72
GW ELEV.
4277.29
4277.47
4277.13
4277.16
4277.14
4277.19
4277.45
4277.53
4277.48
4276.24
DESC.
MW TOC 01
MW TOC 02
MW TOC 03
MW TOC 04
MW TOC 05
MW TOC 06
MW TOC 07
MW TOC 08
MW TOC 09
MW TOC 10
DRAWN BY:CHECKED BY:
PROJECT NO:
DATE:
SCALE:
SHEET:
CMB
VICINITY MAP
LEGEND AND GENERAL NOTES
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NO.REVISION DATE
FINAL
SHEET INFORMATION:
1FIG
TOP STOP C-32
GROUND WATER CONTOURS MAP
(FIGURE 2)
0100509 NLX
1095 SOUTH 500 WEST, BRIGHAM CITY ,UTAH
05/16/2405
CONTACT INFORMATION:
17-002-0000
10/24/2024
1":30'
APPROVED BY:
CULINARY WATER LINE
PURE ENVIRO MANAGEMENT, LLC
GABE REID
1594 S. 1300 E
SPANISH FORK CITY, UT 84660
[phone]
W
TELECOMMUNICATIONS LINET
FUEL LINEFUELFUELFUELFUEL
STORM DRAIN LINESD
SANITARY SEWER LINESS
NATURAL GAS LINENGAS
PROJECT
LOCATION
ROAD WAY CENTER LINE
PROPERTY LINES
NOTES:
1.OVERVIEW IMAGE TAKEN FROM UTAH AGRC 2012 AERIAL IMAGERY.
2.PROPERTY LINES TAKEN FROM UTAH AGRC CADASTRE SHAPEFILE. THE LOCATION OF THE
PROPERTY LINES ARE FOR VISUALIZATION PURPOSES ONLY AND SHOULD NOT BE
INTERPRETED AS A LEGAL BOUNDARY LINE LOCATION.
3.UST LOCATION AND PIPING WERE TAKEN FROM DERR REPORT 2016-015484 AS-BUILT
DRAWING.
4.UTILITY LOCATIONS WERE INTERPOLATED FROM A SAMPLE LOCATION MAP CREATED BY
DAVE HANSEN DATED 2016-11-15. CONTRACTOR SHOULD VERIFY THE LOCATION OF ALL
UTILITIES PRIOR TO ANY EXCAVATION OR CONSTRUCTION.
5.MEASUREMENTS FROM CLOSURE SAMPLES TO UTILITIES WERE MADE IN THE FIELD.
UNDERGROUND POWER LINEP
GW CONTOUR LINES
(0.25 FOOT INTERVALS)
UTOPIA FIBER OPTIC LINEFO
MONITORING WELL LOCATION
(GW ELEVATIONS COLLECTED ON
10/24/2024)
FINAL 10/24/2406
DBJ DBJ
PROFE S S I O N A L LAND S
U
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V
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Y
O
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S
TATE OF U T A H
DAVID B.
JOHNSON
No. 5338869
10/24/2024

Groundwater Monitoring Report – October 24, 2024
Top Stop C-32
Facility ID: 0100569
Release Site: NLX

Appendix B
0.9 25 23 142 51 0.3 1500 5000
0.2 9 5 142 51 0.3 150 500
Sample
Identifi-
cation
Depth (ft)Date
Benzene
(mg/kg)
Toluene
(mg/kg)
Ethyl-
benzene
(mg/kg)
Xylenes
(mg/kg)
Naph-
thalene
(mg/kg)
MTBE
(mg/kg)
8260
TPH-GRO
(C6-C10)
(mg/kg)
8015
TPH-DRO
(C10-C28)
(mg/kg)
Analytical Method 8260B/C 8260B/C 8260B/C 8260B/C 8260B/C 8260B/C 8260B/C 8015C
Sample ID Date
Benzene
(mg/Kg
Toluene
(mg/Kg
Ethyl-
Benzene
(mg/kg)
Xylenes
(mg/kg)
Naph-
thalene
(mg/kg)
MTBE
(mg/kg)
8260
TPH-GRO
(C6-C10)
(mg/kg)
8015
TPH-DRO
(C10-C28)
(mg/kg)
D-1 @ 3'11/9/2016 0.45 6.73 4.34 63.9 2.75 ND 525 836
D-2 @ 3'11/9/2016 ND 0.69 0.61 4.87 0.64 ND 34.7 61
D-3 @ 3'11/9/2016 ND 1.63 1.07 4.75 1.32 ND 296 190
D-4 @ 3'11/9/2016 0.52 4.02 14.5 159 11.9 ND 2310 2050
Analytical Method 8260C 8260C 8260C 8260C 8260C 8260C 8260C 8015D
Sample ID Date
Benzene
(mg/Kg
Toluene
(mg/Kg
Ethyl-
Benzene
(mg/kg)
Xylenes
(mg/kg)
Naph-
thalene
(mg/kg)
MTBE
(mg/kg)
8260
TPH-GRO
(C6-C10)
(mg/kg)
8015
TPH-DRO
(C10-C28)
(mg/kg)
BH-1 @ 5'3/7/2017 15.1 227 33.4 193 5.77 <0.129 2070 300
BH-2 @ 5'3/7/2017 0.476 <0.122 0.132 <0.122 <0.122 <0.122 154 31.9
BH-3 @ 5'3/7/2017 0.973 13.5 4.7 32.5 1.34 <0.132 221 229
BH-4 @ 5'3/7/2017 0.0387 0.0137 0.03 0.0908 0.0158 <0.00628 1.96 <24.7
BH-5 @ 5'3/7/2017 10.1 124 48.6 271 8.07 <0.141 2060 450
BH-6 @ 5'3/7/2017 0.0308 0.0185 0.00908 0.0176 >0.00626 <0.00626 2.04 <26.2
MW-1 @ 4-5'10/20/2017 <0.00291 <0.00581 <0.00581 <0.00581 <0.00581 <0.00581 0.683 <56.6
MW-1 @ 7-8'10/20/2017 0.0301 0.0149 <0.00614 0.106 <0.00614 <0.00614 6.6 <59.6
MW-2 @ 4-5'10/20/2017 <0.00271 <0.00543 <0.00543 <0.00543 <0.00543 <0.00543 <0.0543 <52.4
MW-2 @ 7-8'10/20/2017 <0.00320 <0.00640 <0.00640 <0.00640 <0.00640 <0.00640 0.2 <26.6
MW-3 @ 4-5'10/19/2017 1.04 0.0629 0.618 2.73 <0.0240 <0.0240 16.4 60.9
MW-3 @ 6-7'10/19/2017 8.62 183 38.3 249 2.39 <0.148 1030 276
MW-4 @ 4-5'10/19/2017 0.374 0.0175 0.634 0.792 0.148 <0.00604 29.2 84.7
MW-4 @ 6-7'10/19/2017 0.055 <0.00621 0.234 0.772 0.0371 <0.00621 3.45 99
MW-5 @ 6-7'10/19/2017 <0.00295 <0.00589 <0.00589 <0.00589 <0.00589 <0.00589 <0.0589 NS
MW-6 @ 4-5'10/19/2017 0.671 6.7 1 6.19 <0.111 <0.111 22.6 <52.9
MW-6 @ 6-7'10/19/2017 27.5 344 55.3 329 4.29 <0.131 1620 437
MW-7 @ 4-5'10/19/2017 0.00431 <0.00575 <0.00575 0.0058 <0.00575 <0.00575 <0.0575 <55.1
Soil Samples Taken by Pure Enviro Management
Soil Samples Taken by Rockwell Solutions, Inc.
Table 1
Historical Soil Analytical Results Summary
Top Stop C-32 (Facility ID # 0100569, LUST NO. NLX)
1095 Medical Drive (a.k.a. 500 West) Brigham City, UT
RBCA Tier 1 Screening Levels Soil 2005
Initial Screening Levels Soil 2005
MW-7 @ 6-7'10/19/2017 0.00505 0.0133 <0.00660 <0.00660 <0.00660 <0.00660 4.71 <64.8
Analytical Method 8260C 8260C 8260C 8260C 8260C 8260C 8260C 8015D
Sample ID Date
Benzene
(mg/Kg
Toluene
(mg/Kg
Ethyl-
Benzene
(mg/kg)
Xylenes
(mg/kg)
Naph-
thalene
(mg/kg)
MTBE
(mg/kg)
8260
TPH-GRO
(C6-C10)
(mg/kg)
8015
TPH-DRO
(C10-C28)
(mg/kg)
MW-8 @ 5-6'9/12/2018 <0.00253 <0.00507 <0.00507 0.0247 <0.00507 <0.00507 0.436 24.5
MW-8 @10-11'9/12/2018 0.00336 <0.00538 <0.00538 0.00882 <0.00538 <0.00538 0.11 34
MW-9 @ 5-6'9/12/2018 <0.00262 <0.00525 <0.00525 <0.00525 <0.00525 <0.00525 0.319 30
MW-9 @ 10-11'9/12/2018 0.0725 <0.00706 <0.00706 <0.00706 0.0102 <0.00706 4.67 33.1
MW-10 @5-6'9/12/2018 0.00823 <0.00519 <0.00519 <0.00519 <0.00519 <0.00519 2.95 52.3
MW-10 @ 10-11'9/12/2018 <0.00306 <0.00612 <0.00612 <0.00612 <0.00612 <0.00612 <0.0612 34.8
Soil Samples Taken by Pure Enviro Manangement Continued
0.3 3 4 10 0.7 0.2 10 10
0.005 1 0.7 10 0.7 0.2 1 1
Sample
Identifi-
cation
Depth (ft)Date
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Xylenes
(mg/L)
Naph-
thalene
(mg/L)
MTBE
(mg/L)
8260
TPH-GRO
(C6-C10)
(mg/L)
8015
TPH-DRO
(C10-C28)
(mg/L)
Analytical Method 8260D 8260D 8260D 8260D 8260D 8260D 8260D 8015D
Sample ID Date
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
Benzene
(mg/L)
Xylenes
(mg/L)
Naph-
thalene
(mg/L)
MTBE
(mg/L)
8015
TPH-GRO
(C6-C10)
(mg/L)
8015
TPH-DRO
(C10-C28)
(mg/L)
MW-1 11/2/2017 0.00665 < 0.00200 < 0.00200 0.0022 < 0.00200 < 0.00200 0.0829 < 0.495
7/18/2018 0.0384 < 0.00200 0.00249 0.104 < 0.00200 < 0.00200 0.289 <0.486
8/14/2019 0.00363 < 0.00200 < 0.00200 0.00165 < 0.00200 < 0.00200 0.00528 < 0.492
11/7/2019 0.00113 0.0002 0.00025 0.00064 < 0.00200 < 0.00200 < 0.0200 < 0.494
4/2/2020 0.00553 < 0.00200 0.00121 0.00068 < 0.00200 < 0.00200 0.0672 <0.497
6/24/2020 0.011 0.00046 0.00062 0.00639 < 0.00200 < 0.00200 0.113 < 0.491
4/29/2021 0.00102 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.514
10/21/2021 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 <0.501
4/27/2022 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/27/2022 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/17/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/16/2024 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2024 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1.0
MW-2 11/2/2017 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.488
7/18/2018 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 <0.495
8/14/2019 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.491
11/7/2019 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.493
4/2/2020 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.496
6/24/2020 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.491
4/29/2021 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.499
10/21/2021 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 <0.501
4/27/2022 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/27/2022 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/17/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/16/2024 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2024 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1.0
MW-3 11/2/2017 0.0447 0.103 0.0104 0.153 < 0.00200 < 0.00200 0.567 < 0.490
Ground Water Samples Taken by Pure Enviro Management
Groundwater Analytical Results Summary
Top Stop C-32 (Facility ID # 0100569, LUST NO. NLX)
1095 Medical Drive (a.k.a. 500 West) Brigham City, UT
RBCA Tier 1 Screening Levels Soil 2005
Initial Screening Levels Soil 2005
7/18/2018 0.155 0.369 0.0324 0.254 0.00295 < 0.00200 0.933 <0.479
8/14/2019 0.222 0.355 0.069 0.432 0.0083 < 0.00200 1.35 < 0.491
11/7/2019 0.0581 0.0956 0.0123 0.073 0.00157 < 0.00200 0.311 < 0.493
4/2/2020 0.0342 0.04 0.00642 0.0352 < 0.00200 < 0.00200 0.18 < 0.497
6/24/2020 0.0973 0.0768 0.0228 0.129 0.00152 < 0.00200 0.477 < 0.490
4/29/2021 0.116 0.0149 0.0283 0.146 < 0.00200 < 0.00200 0.375 < 0.498
10/21/2021 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 <0.496
4/27/2022 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/27/2022 0.094 0.022 0.023 0.091 <0.012 <0.005 0.23 <1.0
5/17/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/16/2024 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2024 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1.0
MW-4 11/2/2017 0.0542 < 0.00200 0.0853 0.477 0.0234 < 0.00200 1.45 < 0.487
7/18/2018 0.0201 < 0.00200 0.0272 0.196 0.00746 < 0.00200 0.561 <0.478
8/14/2019 0.0472 0.00112 0.1 0.303 0.0223 < 0.00200 1.09 < 0.497
11/7/2019 0.0189 0.00064 0.0334 0.0919 0.00775 < 0.00200 0.489 < 0.491
4/2/2020 0.0256 0.00097 0.0455 0.0698 0.00745 < 0.00200 0.602 < 0.498
6/24/2020 0.0375 0.00116 0.0654 0.157 0.014 < 0.00200 0.91 < 0.495
4/29/2021 0.0532 < 0.00200 0.0447 0.066 0.00953 < 0.00200 0.768 < 0.498
10/21/2021 0.185 < 0.00200 0.0786 0.0952 0.0135 < 0.00200 0.855 <0.498
4/27/2022 0.02 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/27/2022 0.104 <0.012 0.04 0.029 <0.012 <0.005 0.915 <1.0
5/17/2023 0.14 <0.012 0.178 0.067 0.016 <0.005 1.47 <1.0
10/24/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/16/2024 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2024 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1.0
MW-5 11/2/2017 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.485
7/18/2018 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 <0.477
8/14/2019 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.497
11/7/2019 < 0.00100 < 0.00200 < 0.00200 0.00035 < 0.00200 < 0.00200 < 0.0200 < 0.495
4/2/2020 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.496
6/24/2020 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.497
4/29/2021 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.497
10/21/2021 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 <0.504
4/27/2022 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/27/2022 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/17/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/16/2024 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2024 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1.0
MW-6 11/2/2017 0.263 0.777 0.058 0.615 0.0121 < 0.00200 3.14 < 0.485
7/18/2018 0.227 0.633 0.0644 0.537 0.0102 < 0.00200 1.72 <0.487
8/14/2019 0.333 0.709 0.102 0.653 0.0164 < 0.00200 2.22 < 0.492
11/7/2019 0.149 0.217 0.0289 0.169 0.00486 < 0.00200 0.79 < 0.493
4/2/2020 0.0255 0.0407 0.00426 0.0214 < 0.00200 < 0.00200 0.131 < 0.495
6/24/2020 0.181 0.241 0.0331 0.172 0.00345 < 0.00200 0.9 < 0.492
4/29/2021 0.481 0.464 0.104 0.587 0.00891 < 0.00200 2.16 < 0.491
10/21/2021 0.0126 < 0.00200 < 0.00200 0.00455 < 0.00200 < 0.00200 < 0.0200 <0.503
4/27/2022 0.027 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/27/2022 0.327 0.095 0.176 0.793 0.034 <0.005 7.71 1.7
5/17/2023 0.256 0.121 0.037 0.138 <0.012 <0.012 0.552 <1.0
10/24/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/16/2024 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2024 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1.0
MW-7 11/2/2017 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.488
7/18/2018 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 <0.489
8/14/2019 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.493
11/7/2019 0.00016 0.00044 < 0.00200 0.00044 < 0.00200 < 0.00200 < 0.0200 < 0.490
4/2/2020 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.497
6/24/2020 0.0004 0.00054 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.489
4/29/2021 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.498
10/21/2021 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 <0.500
4/27/2022 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/27/2022 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/17/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/16/2024 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2024 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1.0
MW-8 9/26/2018 <0.00100 <0.00200 <0.00200 <0.00200 <0.00200 <0.00200 <0.0200 <0.489
8/14/2019 0.0004 0.00047 < 0.00200 0.00079 < 0.00200 < 0.00200 < 0.0200 < 0.496
11/7/2019 < 0.00100 0.00021 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.489
4/2/2020 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 0.0235 < 0.499
6/24/2020 0.00026 0.00031 < 0.00200 < 0.00200 < 0.00200 < 0.00200 0.0277 < 0.496
4/29/2021 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.502
10/21/2021 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 <0.499
4/27/2022 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/27/2022 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/17/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/16/2024 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2024 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1.0
MW-9 9/26/2018 0.101 <0.00200 0.00213 <0.00200 0.00278 <0.00200 0.665 0.686
8/14/2019 0.0329 0.00039 < 0.00200 0.00051 < 0.00200 < 0.00200 0.354 < 0.495
11/7/2019 0.112 0.00061 0.00129 0.00146 0.0223 < 0.00200 0.495 0.617
4/2/2020 0.0399 < 0.00200 < 0.00200 < 0.00200 0.00094 < 0.00200 0.577 0.588
6/24/2020 0.0089 0.00037 0.00028 0.00116 0.00413 < 0.00200 0.4 1.06
4/29/2021 0.077 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 0.505 0.617
10/21/2021 0.00627 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 0.282 <0.501
4/27/2022 0.059 <0.012 <0.012 <0.012 <0.012 <0.005 0.196 <1.0
10/27/2022 0.086 <0.012 <0.012 0.017 0.013 <0.005 <0.125 <1.0
5/17/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/16/2024 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2024 0.015 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1.0
MW-10 9/26/2018 <0.00100 <0.00200 <0.00200 <0.00200 <0.00200 <0.00200 <0.0200 <0.490
8/14/2019 0.00202 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 0.0143 < 0.491
11/7/2019 0.00042 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.496
4/2/2020 < 0.00100 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.497
6/24/2020 0.00255 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 0.0178 < 0.497
4/29/2021 0.00161 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.0200 < 0.499
10/21/2021 0.00661 < 0.00200 < 0.00200 < 0.00200 < 0.00200 < 0.00200 0.095 <0.498
4/27/2022 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/27/2022 0.007 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/17/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2023 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
5/16/2024 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
10/24/2024 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1.0
SAMPLE ID TYPE
Well Dia.
Inches TOC (FT)
Sampling
DATE DTW (FT)
GROUND
WATER ELEV.
(FT)COMMENTS
MW-1 Monitoring well 2"4283.31 11/2/2017 5.94 4277.37
7/18/2018 6.04 4277.27
9/26/2018 5.87 4277.44
8/14/2019 5.65 4277.66
11/7/2019 5.7 4277.61
4/2/2020 6.2 4277.11
6/24/2020 6.02 4277.29
4/29/2021 6.45 4276.86
10/21/2021 6.09 4277.22
4/27/2022 6.63 4276.68
10/27/2022 5.88 4277.43
5/17/2023 4.68 4278.63
10/24/2023 5.4 4277.91
5/16/2024 4.36 4278.95
10/24/2024 6.02 4277.29
MW-2 Monitoring well 2"4284.15 11/2/2017 6.55 4277.6
7/18/2018 6.71 4277.44
9/26/2018 6.64 4277.51
8/14/2019 6.22 4277.93
11/7/2019 6.28 4277.87
4/2/2020 6.86 4277.29
6/24/2020 7.03 4277.12
4/29/2021 6.16 4277.99
10/21/2021 6.82 4276.49
4/27/2022 7.41 4276.74
10/27/2022 6.69 4277.46
5/17/2023 5.17 4278.98
10/24/2023 6.05 4278.1
5/16/2024 5.11 4279.04
10/24/2024 6.68 4277.47
MW-3 Monitoring well 2"4282.95 11/2/2017 5.68 4277.27
7/18/2018 5.8 4277.15
9/26/2018 5.62 4277.33
8/14/2019 5.44 4277.51
11/7/2019 5.49 4277.46
4/2/2020 5.94 4277.01
6/24/2020 5.78 4277.17
4/29/2021 6.18 4276.77
TABLE 3
GROUNDWATER ELEVATIONS AND TOP OF CASING
Top Stop C-32 Chevron (FACILITY ID #0100569, LUST NO. NLX)
1095 S Medical Dr., Brigham City, Utah 84302
10/21/2021 5.81 4277.14
4/27/2022 6.33 4276.62
10/27/2022 5.57 4277.38
5/17/2023 4.45 4278.5
10/24/2023 5.13 4277.82
5/16/2024 4.09 4278.86
10/24/2024 5.82 4277.13
MW-4 Monitoring well 2"4282.64 11/2/2017 5.36 4277.28
7/18/2018 5.6 4277.04
9/26/2018 5.35 4277.29
8/14/2019 5.03 4277.61
11/7/2019 5.13 4277.51
4/2/2020 5.61 4277.03
6/24/2020 5.4 4277.24
4/29/2021 5.84 4276.8
10/21/2021 5.5 4277.14
4/27/2022 6.04 4276.6
10/27/2022 5.31 4277.33
5/17/2023 4.09 4278.55
10/24/2023 4.84 4277.8
5/16/2024 3.84 4278.8
10/24/2024 5.48 4277.16
MW-5 Monitoring well 2"4282.2 11/2/2017 5.01 4277.19
7/18/2018 5.08 4277.12
9/26/2018 5.01 4277.19
8/14/2019 4.7 4277.5
11/7/2019 4.73 4277.47
4/2/2020 5.23 4276.97
6/24/2020 4.97 4277.23
4/29/2021 5.46 4276.74
10/21/2021 5.16 4277.04
4/27/2022 5.69 4276.51
10/27/2022 4.93 4277.27
5/17/2023 3.79 4278.41
10/24/2023 4.48 4277.72
5/16/2024 3.54 4278.66
10/24/2024 5.06 4277.14
MW-6 Monitoring well 2"4283.95 11/2/2017 6.2 4277.75
7/18/2018 6.72 4277.23
9/26/2018 6.56 4277.39
8/14/2019 6.34 4277.61
11/7/2019 6.44 4277.51
4/2/2020 6.9 4277.05
6/24/2020 6.7 4277.25
4/29/2021 7.17 4276.78
10/21/2021 6.79 4277.16
4/27/2022 7.32 4276.63
10/27/2022 6.59 4277.36
5/17/2023 5.41 4278.54
10/24/2023 6.1 4277.85
5/16/2024 5.09 4278.86
10/24/2024 6.76 4277.19
MW-7 Monitoring well 2"4284.14 11/2/2017 6.56 4277.58
7/18/2018 6.75 4277.39
9/26/2018 6.66 4277.48
8/14/2019 6.25 4277.89
11/7/2019 6.29 4277.85
4/2/2020 6.88 4277.26
6/24/2020 6.67 4277.47
4/29/2021 7.2 4276.94
10/21/2021 6.83 4277.31
4/27/2022 7.41 4276.73
10/27/2022 6.68 4277.46
5/17/2023 5.19 4278.95
10/24/2023 6.05 4278.09
5/16/2024 5.12 4279.02
10/24/2024 6.69 4277.45
MW-8 Monitoring well 2"4284.09 9/26/2018 6.56 4277.53
8/14/2019 6.11 4277.98
11/7/2019 6.14 4277.95
4/2/2020 6.76 4277.33
6/24/2020 6.5 4277.59
4/29/2021 7.1 4276.99
10/21/2021 6.75 4202.09
4/27/2022 7.33 4276.76
10/27/2022 6.63 4277.46
5/17/2023 5.02 4279.07
10/24/2023 5.95 4278.14
5/16/2024 5.03 4279.06
10/24/2024 6.56 4277.53
MW-9 Monitoring well 2"4282.23 9/26/2018 4.86 4277.37
8/14/2019 4.34 4277.89
11/7/2019 4.4 4277.83
4/2/2020 5 4277.23
6/24/2020 4.76 4277.47
4/29/2021 5.28 4276.95
10/21/2021 4.96 4277.27
4/27/2022 5.49 4276.74
10/27/2022 4.84 4277.39
5/17/2023 3.41 4278.82
10/24/2023 4.14 4278.09
5/16/2024 3.25 4278.98
10/24/2024 4.75 4277.48
MW-10 Monitoring well 2"4282.17 9/26/2018 5.45 4276.72
8/14/2019 5.4 4276.77
11/7/2019 5.68 4276.49
4/2/2020 5.83 4276.34
6/24/2020 5.61 4276.56
4/29/2021 5.92 4276.25
10/21/2021 5.59 4276.58
4/27/2022 5.99 4276.18
10/27/2022 5.19 4276.98
5/17/2023 4.52 4277.65
10/24/2023 5.11 4277.06
5/16/2024 3.69 4278.48
10/24/2024 5.93 4276.24
DTW = DEPTH TO WATER
TOC = TOP OF CASING

Groundwater Monitoring Report – October 24, 2024
Top Stop C-32
Facility ID: 0100569
Release Site: NLX

Appendix C
The analyses presented on this report were performed in accordance with the
National Environmental Laboratory Accreditation Program (NELAP) unless
noted in the comments, flags, or case narrative. If the report is to be used for
regulatory compliance, it should be presented in its entirety, and not be
altered.
Client Service Contact: 801.262.7299
Pure Enviro Management (PEM)
Attn: William Moore
1594 South 1300 East
Spanish Fork, UT 84660
Work Order: 24J2204
Project: 0100569 NLX Brigham City Top Stop
11/7/2024
Approved By:
Reed Hendricks, Lab Director
9632 South 500 West Sandy, Utah 84070
Serving the Intermountain West since 1953
801.262.7299 Main 866.792.0093 Fax www.ChemtechFord.com
Page 1 of 13
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Pure Enviro Management (PEM)
William Moore
1594 South 1300 East
Spanish Fork, UT 84660
PO#:
Receipt:
Date Reported:
Project Name:
10/24/24 16:34 @ 2.7 °C
11/7/2024
0100569 NLX Brigham City Top Stop
Sample ID: MW #1
Lab ID: 24J2204-01Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/24/24 12:38
Preparation
Date/Time
Sampled By: William Moore
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/28/2410/28/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/28/2410/28/240.005 EPA 8260D/5030BNDBenzene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-L10/28/2410/28/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDToluene
mg/L 10/28/2410/28/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/28/2410/28/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 10/29/2410/29/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: 0100569 NLX Brigham City Top Stop CtF WO#: 24J2204
www.ChemtechFord.com
Page 2 of 13Page 2 of 13
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Pure Enviro Management (PEM)
William Moore
1594 South 1300 East
Spanish Fork, UT 84660
PO#:
Receipt:
Date Reported:
Project Name:
10/24/24 16:34 @ 2.7 °C
11/7/2024
0100569 NLX Brigham City Top Stop
Sample ID: MW #2
Lab ID: 24J2204-02Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/24/24 12:53
Preparation
Date/Time
Sampled By: William Moore
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/28/2410/28/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/28/2410/28/240.005 EPA 8260D/5030BNDBenzene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-L10/28/2410/28/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDToluene
mg/L 10/28/2410/28/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/28/2410/28/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 10/29/2410/29/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: 0100569 NLX Brigham City Top Stop CtF WO#: 24J2204
www.ChemtechFord.com
Page 3 of 13Page 3 of 13
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Pure Enviro Management (PEM)
William Moore
1594 South 1300 East
Spanish Fork, UT 84660
PO#:
Receipt:
Date Reported:
Project Name:
10/24/24 16:34 @ 2.7 °C
11/7/2024
0100569 NLX Brigham City Top Stop
Sample ID: MW #3
Lab ID: 24J2204-03Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/24/24 13:05
Preparation
Date/Time
Sampled By: William Moore
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/28/2410/28/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/28/2410/28/240.005 EPA 8260D/5030BNDBenzene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-L10/28/2410/28/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDToluene
mg/L 10/28/2410/28/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/28/2410/28/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 10/29/2410/29/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: 0100569 NLX Brigham City Top Stop CtF WO#: 24J2204
www.ChemtechFord.com
Page 4 of 13Page 4 of 13
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Pure Enviro Management (PEM)
William Moore
1594 South 1300 East
Spanish Fork, UT 84660
PO#:
Receipt:
Date Reported:
Project Name:
10/24/24 16:34 @ 2.7 °C
11/7/2024
0100569 NLX Brigham City Top Stop
Sample ID: MW #4
Lab ID: 24J2204-04Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/24/24 13:16
Preparation
Date/Time
Sampled By: William Moore
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/28/2410/28/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/28/2410/28/240.005 EPA 8260D/5030BNDBenzene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-L10/28/2410/28/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDToluene
mg/L 10/28/2410/28/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/28/2410/28/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/1/2410/31/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: 0100569 NLX Brigham City Top Stop CtF WO#: 24J2204
www.ChemtechFord.com
Page 5 of 13Page 5 of 13
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Pure Enviro Management (PEM)
William Moore
1594 South 1300 East
Spanish Fork, UT 84660
PO#:
Receipt:
Date Reported:
Project Name:
10/24/24 16:34 @ 2.7 °C
11/7/2024
0100569 NLX Brigham City Top Stop
Sample ID: MW #5
Lab ID: 24J2204-05Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/24/24 13:29
Preparation
Date/Time
Sampled By: William Moore
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/28/2410/28/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/28/2410/28/240.005 EPA 8260D/5030BNDBenzene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-L10/28/2410/28/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDToluene
mg/L 10/28/2410/28/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/28/2410/28/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/1/2410/31/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: 0100569 NLX Brigham City Top Stop CtF WO#: 24J2204
www.ChemtechFord.com
Page 6 of 13Page 6 of 13
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Pure Enviro Management (PEM)
William Moore
1594 South 1300 East
Spanish Fork, UT 84660
PO#:
Receipt:
Date Reported:
Project Name:
10/24/24 16:34 @ 2.7 °C
11/7/2024
0100569 NLX Brigham City Top Stop
Sample ID: MW #6
Lab ID: 24J2204-06Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/24/24 13:41
Preparation
Date/Time
Sampled By: William Moore
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/28/2410/28/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/28/2410/28/240.005 EPA 8260D/5030BNDBenzene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-L10/28/2410/28/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDToluene
mg/L 10/28/2410/28/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/28/2410/28/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/1/2410/31/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: 0100569 NLX Brigham City Top Stop CtF WO#: 24J2204
www.ChemtechFord.com
Page 7 of 13Page 7 of 13
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Pure Enviro Management (PEM)
William Moore
1594 South 1300 East
Spanish Fork, UT 84660
PO#:
Receipt:
Date Reported:
Project Name:
10/24/24 16:34 @ 2.7 °C
11/7/2024
0100569 NLX Brigham City Top Stop
Sample ID: MW #7
Lab ID: 24J2204-07Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/24/24 13:48
Preparation
Date/Time
Sampled By: William Moore
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 11/6/2411/6/240.005 EPA 8260D/5030BNDBenzene
mg/L 11/6/2411/6/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-C11/6/2411/6/240.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 11/6/2411/6/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 11/6/2411/6/240.012 EPA 8260D/5030BNDToluene
mg/L 11/6/2411/6/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 11/6/2411/6/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/1/2410/31/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: 0100569 NLX Brigham City Top Stop CtF WO#: 24J2204
www.ChemtechFord.com
Page 8 of 13Page 8 of 13
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Pure Enviro Management (PEM)
William Moore
1594 South 1300 East
Spanish Fork, UT 84660
PO#:
Receipt:
Date Reported:
Project Name:
10/24/24 16:34 @ 2.7 °C
11/7/2024
0100569 NLX Brigham City Top Stop
Sample ID: MW #8
Lab ID: 24J2204-08Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/24/24 13:56
Preparation
Date/Time
Sampled By: William Moore
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L J-LOW-L10/28/2410/28/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/28/2410/28/240.005 EPA 8260D/5030BNDBenzene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDToluene
mg/L 10/28/2410/28/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/28/2410/28/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/1/2410/31/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: 0100569 NLX Brigham City Top Stop CtF WO#: 24J2204
www.ChemtechFord.com
Page 9 of 13Page 9 of 13
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Pure Enviro Management (PEM)
William Moore
1594 South 1300 East
Spanish Fork, UT 84660
PO#:
Receipt:
Date Reported:
Project Name:
10/24/24 16:34 @ 2.7 °C
11/7/2024
0100569 NLX Brigham City Top Stop
Sample ID: MW #9
Lab ID: 24J2204-09Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/24/24 14:07
Preparation
Date/Time
Sampled By: William Moore
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L J-LOW-L10/28/2410/28/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/28/2410/28/240.005 EPA 8260D/5030B0.015Benzene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDToluene
mg/L 10/28/2410/28/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/28/2410/28/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/1/2410/31/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: 0100569 NLX Brigham City Top Stop CtF WO#: 24J2204
www.ChemtechFord.com
Page 10 of 13Page 10 of 13
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Pure Enviro Management (PEM)
William Moore
1594 South 1300 East
Spanish Fork, UT 84660
PO#:
Receipt:
Date Reported:
Project Name:
10/24/24 16:34 @ 2.7 °C
11/7/2024
0100569 NLX Brigham City Top Stop
Sample ID: MW #10
Lab ID: 24J2204-10Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/24/24 14:25
Preparation
Date/Time
Sampled By: William Moore
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L J-LOW-L10/28/2410/28/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/28/2410/28/240.005 EPA 8260D/5030BNDBenzene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/28/2410/28/240.012 EPA 8260D/5030BNDToluene
mg/L 10/28/2410/28/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/28/2410/28/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/1/2410/31/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: 0100569 NLX Brigham City Top Stop CtF WO#: 24J2204
www.ChemtechFord.com
Page 11 of 13Page 11 of 13
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Pure Enviro Management (PEM)
William Moore
1594 South 1300 East
Spanish Fork, UT 84660
PO#:
Receipt:
Date Reported:
Project Name:
10/24/24 16:34 @ 2.7 °C
11/7/2024
0100569 NLX Brigham City Top Stop
Report Footnotes
Abbreviations
ND = Not detected at the corresponding Minimum Reporting Limit (MRL).
1 mg/L = one milligram per liter or 1 mg/kg = one milligram per kilogram = 1 part per million.
1 ug/L = one microgram per liter or 1 ug/kg = one microgram per kilogram = 1 part per billion.
1 ng/L = one nanogram per liter or 1 ng/kg = one nanogram per kilogram = 1 part per trillion.
On calculated parameters, there may be a slight difference between summing the rounded values shown on the report
vs the unrounded values used in the calculation.
Flag Descriptions
J-LOW-C = Estimated low due to low recovery of CCV
J-LOW-L = Estimated low due to low recovery of LCS
Project Name: 0100569 NLX Brigham City Top Stop CtF WO#: 24J2204
www.ChemtechFord.com
Page 12 of 13Page 12 of 13
Page 13 of 13

Site Name: Top Stop C-32, 1095 Medical Dr., Brigham City, Utah
Date of Sampling: October 24, 2024
Samplers: William Moore, GS-0062

Well Number: MW-1 MW-2 MW-3
Time of Sampling: 12:38pm 12:53pm 1:05pm
Lock Condition: Bolted Bolted Bolted
VOC Measurement in Casing: NA NA NA
Oxygen in Casing NA NA NA
Water Measurement Device Heron Heron Heron
Depth to Static Water Level 6.02’ 6.68’ 5.82’
Depth to Well Bottom 14.69' 14.68' 14.64’
Volume Difference (feet) 8.67’ 8’ 8.82’
Volume Difference (gallons) 4.41 3.92 4.41
Apparent Siltation 1” 1” 0.5”
Volume Bailed (gallons) 4.5 4 4.5
Free Product/Thickness NA NA NA
Method of Measurement NA NA NA
Sampling of Product NA NA NA
Dissolved Oxygen, mg/L NA NA NA
pH NA NA NA
Eh, mv NA NA NA
Temperature, °C NA NA NA
Conductivity NA NA NA
Purging Procedure Geosub 2 Geosub 2 Geosub 2
Conductivity Stabilized? NA NA NA
Disposal of Purged Water Surface to evaporate Surface to evaporate Surface to evaporate
Water Sampling Equipment Geosub 2 Geosub 2 Geosub 2
Type of Analyses MBTEXN, GRO/DRO MBTEXN, GRO/DRO MBTEXN, GRO/DRO
Dedicated or Decontaminated Decontaminated Decontaminated Decontaminated

Comments: All wells 2" PVC

Site Name: Top Stop C-32, 1095 Medical Dr., Brigham City, Utah
Date of Sampling: October 24, 2024
Samplers: William Moore, GS-0062

Well Number: MW-4 MW-5 MW-6
Time of Sampling: 1:16pm 1.29pm 1.41pm
Lock Condition: Bolted Bolted Bolted
VOC Measurement in Casing: NA NA NA
Oxygen in Casing NA NA NA
Water Measurement Device Heron Heron Heron
Depth to Static Water Level 5.48’ 5.06’ 6.76’
Depth to Well Bottom 14.71' 14.65' 14.64'
Volume Difference (feet) 9.23’ 9.59’ 7.88’
Volume Difference (gallons) 4.66 4.90 3.92
Apparent Siltation 0.75” 0.75” 0.5”
Volume Bailed (gallons) 5 5 4
Free Product/Thickness NA NA NA
Method of Measurement NA NA NA
Sampling of Product NA NA NA
Dissolved Oxygen, mg/L NA NA NA
pH NA NA NA
Eh, mv NA NA NA
Temperature, °C NA NA NA
Conductivity NA NA NA
Purging Procedure Geosub 2 Geosub 2 Geosub 2
Conductivity Stabilized? NA NA NA
Disposal of Purged Water Surface to evaporate Surface to evaporate Surface to evaporate
Water Sampling Equipment Geosub 2 Geosub 2 Geosub 2
Type of Analyses MBTEXN, GRO/DRO MBTEXN, GRO/DRO MBTEXN, GRO/DRO
Dedicated or Decontaminated Decontaminated Decontaminated Decontaminated

Comments: All wells 2" PVC

Site Name: Top Stop C-32, 1095 Medical Dr., Brigham City, Utah
Date of Sampling: October 24, 2024
Samplers: William Moore, GS-0062

Well Number: MW-7 MW-8 MW-9
Time of Sampling: 1:48pm 1:56pm 2:07pm
Lock Condition: Bolted Bolted Locked
VOC Measurement in Casing: NA NA NA
Oxygen in Casing NA NA NA
Water Measurement Device Heron Heron Heron
Depth to Static Water Level 6.69’ 6.56’ 4.75’
Depth to Well Bottom 14.11' 14.94' 14.89'
Volume Difference (feet) 7.42’ 8.38’ 10.14’
Volume Difference (gallons) 3.68 4.17 4.90
Apparent Siltation 0.75” 0.5” 0”
Volume Bailed (gallons) 4 4.5 5
Free Product/Thickness NA NA NA
Method of Measurement NA NA NA
Sampling of Product NA NA NA
Dissolved Oxygen, mg/L NA NA NA
pH NA NA NA
Eh, mv NA NA NA
Temperature, °C NA NA NA
Conductivity NA NA NA
Purging Procedure Geosub 2 Geosub 2 Geosub 2
Conductivity Stabilized? NA NA NA
Disposal of Purged Water Surface to evaporate Surface to evaporate Surface to evaporate
Water Sampling Equipment Geosub 2 Geosub 2 Geosub 2
Type of Analyses MBTEXN, GRO/DRO MBTEXN, GRO/DRO MBTEXN, GRO/DRO
Dedicated or Decontaminated Decontaminated Decontaminated Decontaminated

Comments: All wells 2" PVC: MW-9 locked - Bill has key.

Site Name: Top Stop C-32, 1095 Medical Dr., Brigham City, Utah
Date of Sampling: October 24, 2024
Samplers: William Moore, GS-0062

Well Number: MW-10
Time of Sampling: 2:25pm
Lock Condition: Bolted
VOC Measurement in Casing: NA
Oxygen in Casing NA
Water Measurement Device Heron
Depth to Static Water Level 5.93’
Depth to Well Bottom 14.92'
Volume Difference (feet) 8.99’
Volume Difference (gallons) 4.41
Apparent Siltation 0”
Volume Bailed (gallons) 4.5
Free Product/Thickness NA
Method of Measurement NA
Sampling of Product NA
Dissolved Oxygen, mg/L NA
pH NA
Eh, mv NA
Temperature, °C NA
Conductivity NA
Purging Procedure Geosub 2
Conductivity Stabilized? NA
Disposal of Purged Water Surface to evaporate
Water Sampling Equipment Geosub 2
Type of Analyses MBTEXN, GRO/DRO
Dedicated or Decontaminated Decontaminated

Comments: All wells 2" PVC

DAILY LOG

DATE October 24, 2024

JOB #/LOCATION: 0100569 NLX-12, Top Stop C-32, Brigham City, UT

JOB OBJECTIVES: Groundwater Sampling of Ten existing Monitoring Wells

EMPLOYEES: William Moore, Utah Certified Sampler GS-62; Matthew Hinck, Technician,
Brady McBride, Ville Wolfgramm, Trainees.

ON SITE PERSONNEL: Station was open for business. Informed clerk of proceeding to
sample.

PROJECT DESCRIPTION: Left Office about 7 am. Arrived on site at 9:10 am. It was 44
degrees F in the morning upon arrival. It warmed to about 56 degrees F at the time PEM left site
at about 2:33 pm. The day was initially partly cloudy and became clear with calm winds.
Measured initial water levels with Heron Meter, calculated volumes. Removed 3 full well
volumes, and sampled for MBTEXN, TPH-GRO, and TPH-DRO in all ten wells.

SAFETY Level (D)
Discussed safety level D, safety equipment, medical care facility in town, and to watch out for
onsite traffic even in small town. Donned safety vests. Used safety cones, red wagon and orange
buckets to mark off sampling locations.

DECONTAMINATION
Set up for decontamination station in orange buckets in wagon for cleaning Heron meter between
each well and the submersible pump.

PUMPED ALL WELLS
Pumped all wells with submersible pump for three well volumes, decontaminated Geosub
between wells. Disposed of nitrile gloves, old tubing, in the Station’s trash dumpster.

SAMPLING
Sampled all wells using the decontaminated submersible pump with new tubing. Place all
samples immediately on ice in cooler. Once finished sampling covered all samples with ice.

Returned to office 5 pm. Delivered samples personally to Chem Tec Ford Laboratory (CTFL) to
turn in at about 4:24 pm.

PROBLEMS: Wells had much more siltation than previous samplings but had plenty of water.
Too much draw down while pumping on two wells as we could hear cavitation. Set Geosub to
slower flow in order to not cavitate, didn’t lower to well bottom and it worked better.

SOLUTIONS OFFERED: Set Geosub to slower flow with no cavitation worked better.

EQUIPMENT MAINTENANCE AND REPAIR: Need to get Geosub2 screen cleaned well
before the next sampling.

EQUIPMENT USED: Heron Meter, Submersible pump,

NOTES FOR FUTURE REFERENCE: Technician aided in getting samples done on one trip.
Ensure battery is charged up before sampling events.

COMMENTS: Completed and packed equipment and samples. We left the site by about 2:33
pm to head to drop off equipment and CTFL to drop off samples at 4:24 pm. Arrived at office by
5pm.