DERR-2024-012688

Underwood Environmental Consulting, Inc.
9475 N. Silver Creek Rd., Park City, Utah 84098  Phone [phone]  Fax [phone]

GROUNDWATER MONITORING REPORT
October 2024

Work Plan NYL-04
December 5, 2024

Jacksons #151
278 West 2100 South
Salt Lake City, Utah
Facility ID #4001294, Release Site NYL

Submitted To:

Mr. Andrew Marvin
Jacksons Food Stores
3450 East Commercial Court
Meridian, Idaho 83642

Copy To:

Ms. Nicole Chavez
Department of Environmental Quality
Division of Environmental Response and Remediation
P.O. Box 144840
Salt Lake City, Utah 84114-4840

Groundwater Monitoring Report – October 2024
Jacksons #151
278 W. 2100 S., Salt Lake City, UT
Facility ID #4001294, Release Site NYL

Underwood Environmental Consulting, Inc.
1
1.0 INTRODUCTION

Underwood Environmental Consulting, Inc. (UEC) has been retained by Jacksons Food Stores to
perform groundwater monitoring at the Jacksons #151 service station in Salt Lake City, Utah.
The project site, located at 278 West 2100 South, includes a convenience store, fueling facilities,
and a car wash (Figure 1). The groundwater monitoring event was conducted to assess
groundwater conditions following a release of gasoline from a fuel dispenser reported in
September 2020. The site is eligible for Petroleum Storage Tank (PST) Fund reimbursement.
The Utah Division of Environmental Response and Remediation (DERR) identifies the project
site as Facility ID #4001294, Release Site NYL.

2.0 BACKGROUND

The project site has been a gas station since the 1940’s. The site has three previous release
designations (GMH, HDY, and LOV). Release GMH received a “no further action” (NFA)
letter in 2000 (DERR, 2000). Releases HDY and LOV were closed under an environmental
covenant and received NFA letter(s) in 2019 (DERR, 2019).

Release NYL was opened based upon inventory shortages noted from late August to early
September 2020. The leak was also observed within the containment sump under a dispenser
(dispenser #9-10). The leak was repaired, and the lines then tested and passed, on or about
September 4, 2020. An existing monitoring well network was checked at that time for
indications of a recent release.

A subsurface investigation was conducted in November 2020 to assess Release NYL. Three soil
borings and three new monitoring wells were installed around the perimeter of the retail
dispenser islands. Petroleum hydrocarbons were detected in soil samples above Tier 1 levels.
Hydrocarbons were detected above Initial Screening levels in groundwater samples. No free
phase product was observed during the subsurface investigation or during checks of the existing
well network (UEC, 2021).

3.0 METHODOLOGY

3.1 Groundwater Monitoring

On October 21, 2024, water levels were measured in nine monitoring wells using an electronic
water level indicator. The monitor wells were subsequently purged of three casing volumes of
water, or until dry, prior to sampling. A separate disposable bailer was utilized for each well.
The groundwater samples were labeled appropriately, placed on ice, and submitted to the
laboratory under chain-of-custody. The groundwater samples were analyzed for methyl tertiary
butyl ether (MTBE), benzene, toluene, ethylbenzene, total xylenes, naphthalene (BTEXN), total
petroleum hydrocarbons – gasoline range organics (TPH-GRO), and TPH – diesel range
organics (TPH-DRO) using EPA methods 8260D, 8260B/C, and 8015C.
Groundwater Monitoring Report – October 2024
Jacksons #151
278 W. 2100 S., Salt Lake City, UT
Facility ID #4001294, Release Site NYL

Underwood Environmental Consulting, Inc.
2

4.0 RESULTS

4.1 Depth to Water and Flow Direction

On October 21, 2024, the depth to groundwater ranged from 4.48 to 5.63 feet below top-of-
casing (TOC) (Table 1). Figure 1 depicts a groundwater contour map for the project site on the
same date. Based on the measured groundwater elevations, the groundwater flow direction is to
the northwest.

4.2 Groundwater Analytical Results

Nine monitoring wells were purged and sampled on October 21-22, 2024. The groundwater
analytical results presented on Table 1 are compared with Initial Screening Levels (ISLs) and
Tier 1 Levels (DERR, 2005). Table 1 includes groundwater monitoring data dating back to 2002
for some pre-existing wells.

Of the nine groundwater monitoring wells sampled, seven wells exceeded the ISL for benzene
(0.005 mg/L). The highest benzene concentration detected in groundwater was 2.18 mg/L at
MW-37 (also exceeds Tier 1). Groundwater at two well locations sampled exceeded the ISL for
TPH-GRO. The highest TPH-GRO concentration detected in groundwater was 3.13 mg/L at
MW-37. Seven of nine monitoring wells sampled exceeded the ISL for TPH-DRO (1 mg/L).
The highest TPH-DRO concentration detected in groundwater was 3.6 mg/L at MW-9. Based
on project site history, TPH-DRO concentrations in soil and groundwater are generally
considered residual in nature (Figure 1; Table1).

A hydrocarbon sheen was observed on groundwater removed from monitoring wells MW-10 and
MW-37. No measurable free product, aside from the noted sheen, has been observed in
monitoring wells accessed since the report of the release.

The laboratory analytical reports for the October 2024 groundwater monitoring event are
provided as an attachment.

5.0 CONCLUSIONS

Based on field observations and the October 2024 groundwater analytical results, the following
conclusions are presented:

• Depth to groundwater ranged from approximately 4.4 to 5.6 feet below top of well
casing.

• The groundwater flow direction is to the northwest.

Groundwater Monitoring Report – October 2024
Jacksons #151
278 W. 2100 S., Salt Lake City, UT
Facility ID #4001294, Release Site NYL

Underwood Environmental Consulting, Inc.
3
• The ISL for benzene was exceeded at seven of nine well locations sampled. The highest
benzene concentration detected in groundwater was 2.18 mg/L at MW-37.

• The ISL was exceeded for TPH-GRO at two well locations. The highest TPH-GRO
concentration detected in groundwater was 3.13 mg/L at MW-37.

• The ISL for TPH-DRO was exceeded at the seven of nine well locations sampled. TPH-
DRO concentrations in groundwater at the project site are generally considered residual
in nature.

• No measurable free product, aside from a sheen, has been observed in monitoring wells
accessed since the report of the release.

Submittal of this groundwater monitoring report concludes tasks approved under work plan
NYL-04.

6.0 LIMITATIONS

Our services consist of professional opinions from a state-certified consultant, made in general
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. UEC makes no guarantee, either
expressed or implied, that the analytical results accurately represent subsurface conditions
throughout the entire project site.

Respectfully,
Underwood Environmental Consulting, Inc.
James A. McReel, P.G. L. Earl Underwood, P.G.
Project Geologist, CC-0044 Sr. Geologist, CC-0018

Attachments: Table 1 Groundwater Monitoring Data
Figure 1 Groundwater Contour Map – Oct. 21, 2024
Laboratory Analytical Reports

Groundwater Monitoring Report – October 2024
Jacksons #151
278 W. 2100 S., Salt Lake City, UT
Facility ID #4001294, Release Site NYL

Underwood Environmental Consulting, Inc.
4

References Cited:

DERR, 2000 Memorandum, Facility Identification No. 4001294, Release EGMH, U.S.
West Fiber Optic Line, Located at the Northeast Corner of 300 West and
2100 South, Salt Lake City, Utah: Utah Division of Environmental
Response and Remediation, Salt Lake City, Utah, August 10, 2000.

DERR, 2005 Utah LUST Program Screening Levels for Soil and Groundwater: Utah
Division of Environmental Response and Remediation, Salt Lake City,
Utah, November 1, 2005.

DERR, 2019 No Further Action, Underground Storage Tank Release, Environmental
Covenant, Salt Lake Recorder Nos. 13022943 & 13022944, Premium Oil
#1 (Jacksons #151), located at 278 West 2100 South, Salt Lake City, UT,
Facility Identification No. 4001294, Release Sites HDY & LOV: Utah
Division of Environmental Response and Remediation, Salt Lake City,
Utah, July 18, 2019.

UEC, 2021 Initial Subsurface Investigation Report, Release NYL, Jacksons #151, 278
West 2100 South, Salt Lake City, Utah, Facility ID #4001294, Release
Site NYL: Underwood Environmental Consulting, Inc., Park City, Utah,
January 4, 2021.
Groundwater Monitoring Report - October 2024
Jacksons #151
278 W. 2100 S., Salt Lake City, UT
Facility ID #4001294, Release Site NYL
WELL/DATE DTW
GW
Elev.MTBE Benzene Toluene
Ethyl-
benzene Xylenes
Naphth-
alene
TPH
(GRO)
TPH
(DRO)ELEV.(feet)(feet)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)
MW-2 03/23/04 1.100 0.120 0.0029 <0.002 0.0069 0.0028 0.73 0.029
101.51 07/21/05 NM NA
10/02/07 5.12 96.39 0.19 0.015 0.0029 <0.002 0.0062 <0.002 0.47 0.025
01/19/10 5.38 96.13 0.053 0.027 0.015 <0.002 0.018 0.0020 0.41 0.021
03/10/11 4.59 96.92 0.038 0.376 0.006 0.005 0.072 <0.002 1.02 <1
08/02/12 4.87 96.64 0.008 0.035 0.001 <0.001 <0.003 <0.002 0.396 <1
01/08/14 5.24 96.27 0.007 0.228 0.002 <0.001 0.005 <0.002 0.578 <1
11/28/17 5.76 95.75
4238.60 07/23/18 5.56 4233.04 0.007 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
12/01/20 5.79 4232.81 0.007 0.227 <0.012 <0.012 <0.012 <0.012 1.06 <1.0
03/19/21 5.56 4233.04 0.011 <0.005 <0.012 <0.012 <0.012 <0.012 0.693 <1.0
06/10/21 5.47 4233.13 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
09/08/21 5.30 4233.30 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
12/05/21 5.96 4232.64 0.008 0.036 <0.012 <0.012 <0.012 <0.012 0.434 <1.0
06/13/22 4.93 4233.67 <0.005 0.026 <0.012 <0.012 <0.012 <0.012 0.219 1.6
12/24/22 5.36 4233.24 0.010 0.056 <0.012 <0.012 <0.012 <0.012 6.70 1.2
04/11/24 5.08 4233.52 <0.005 0.011 <0.012 <0.012 <0.012 <0.012 0.395 2.5
10/21/24 4.75 4233.85 <0.008 <0.005 <0.012 <0.012 <0.038 <0.012 0.214 1.3
MW-3 03/23/04 0.068 0.022 <0.002 0.0029 <0.002 <0.002 0.17 <0.02
100.97 07/21/05 4.30 96.67 0.20 0.024 <0.002 <0.002 <0.002 <0.002 0.19 <0.02
10/02/07 4.73 96.24 0.090 0.032 0.0020 <0.002 0.0040 <0.002 0.19 <0.02
01/19/10 4.37 96.60 0.036 0.040 0.0026 <0.002 0.0030 <0.002 0.16 <0.02
03/10/11 4.07 96.90 0.003 0.002 <0.001 <0.001 <0.003 <0.002 <0.05 <1
100.93 08/03/12 4.84 96.09 0.016 0.023 0.002 <0.001 0.004 <0.002 0.489 <1
01/07/14 4.66 96.27 0.012 0.011 0.002 <0.001 0.004 <0.002 0.396 <1
11/28/17 5.28 95.65
4238.02 07/23/18 5.21 4232.81 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 1.2
12/01/20 5.42 4232.60
03/19/21 5.16 4232.86 <0.005 0.083 <0.012 <0.012 <0.012 <0.012 0.523 1.4
06/10/21 5.03 4232.99 <0.005 0.292 <0.012 <0.012 0.034 <0.012 0.851 1.2
09/08/21 4.87 4233.15 <0.005 0.131 <0.012 <0.012 <0.012 <0.012 0.509 1.1
12/05/21 5.54 4232.48 <0.005 0.011 <0.012 <0.012 <0.012 <0.012 0.242 <1.0
06/13/22 4.68 4233.34 <0.005 0.008 <0.012 <0.012 <0.012 <0.012 <0.125 1.8
12/24/22 4.97 4233.05 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 1.45 1.2
04/11/24 4.65 4233.37 <0.005 0.030 <0.012 <0.012 <0.012 <0.012 <0.125 1.8
10/21/24 4.48 4233.54 <0.008 0.008 <0.012 <0.012 <0.038 <0.012 <0.125 1.6
MW-4 03/23/04 0.290 0.380 0.012 0.044 0.044 0.0077 2.7 0.15
100.59 07/21/05 NM NA
10/02/07 4.51 96.08 0.16 0.16 0.0091 <0.002 0.016 <0.002 1.3 0.080
01/19/10 4.65 95.94 0.057 0.076 0.0057 0.0051 0.014 <0.002 0.73 0.046
03/10/11 3.62 96.97 0.053 0.067 0.01 <0.001 0.013 <0.002 0.702 <1
08/03/12 4.27 96.32 <0.001 0.021 0.002 0.005 0.006 <0.002 0.934 <1
01/08/14 4.38 96.21 0.011 0.466 0.009 <0.005 0.049 <0.01 1.06 <1
04/13/15 4.41 96.18 0.055 0.096 0.005 <0.001 0.008 <0.002 1.45 NA
11/28/17 5.05 95.54
4237.68 07/23/18 4.75 4232.93 0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
03/19/21 5.17 4232.51 0.008 0.087 <0.012 <0.012 <0.012 <0.012 0.953 1.8
06/10/21 5.00 4232.68 <0.005 0.027 <0.012 <0.012 <0.012 <0.012 0.170 <1.0
09/08/21 4.85 4232.83 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
12/05/21 5.44 4232.24 0.013 0.086 0.015 <0.012 <0.012 <0.012 0.440 1.6
06/13/22 4.60 4233.08 0.007 0.224 <0.012 <0.012 0.017 <0.012 0.724 1.3
12/24/22 4.87 4232.81 0.008 0.394 <0.012 <0.012 0.022 <0.012 7.80 2.7
04/11/24 4.47 4233.21 <0.005 0.544 <0.012 <0.012 0.012 <0.012 1.28 3.9
10/21/24 4.52 4233.16 <0.008 0.544 <0.012 <0.012 <0.038 <0.012 0.835 1.5
Initial Screening Levels (1)0.2 0.005 1 0.7 10 0.7 1 1
Tier 1 Screening Criteria (1):0.2 0.3 3 4 10 0.7 10 10
TABLE 1
GROUNDWATER MONITORING DATA
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Underwood Environmental Consulting, Inc.
Groundwater Monitoring Report - October 2024
Jacksons #151
278 W. 2100 S., Salt Lake City, UT
Facility ID #4001294, Release Site NYL
WELL/DATE DTW
GW
Elev.MTBE Benzene Toluene
Ethyl-
benzene Xylenes
Naphth-
alene
TPH
(GRO)
TPH
(DRO)ELEV.(feet)(feet)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)
TABLE 1
GROUNDWATER MONITORING DATA
MW-9 03/23/04 1.200 0.870 0.044 0.019 0.400 0.021 2.5 0.063
102.73 07/21/05 5.75 96.98 0.75 1 0.027 <0.002 0.33 0.0042 2.2 <0.02
10/02/07 6.11 96.62 0.32 0.32 0.0095 0.0026 0.080 <0.002 1.0 0.041
01/19/10 6.27 96.46 0.24 0.21 0.018 <0.002 0.061 <0.002 0.51 <0.02
03/10/11 5.66 97.07 0.123 0.195 <0.005 <0.005 <0.015 <0.01 0.742 <1
102.57 08/02/12 5.74 96.83 0.093 0.238 0.008 0.001 0.049 <0.002 1.15 <1
01/07/14 6.08 96.49 0.103 0.136 0.006 <0.005 0.047 <0.01 0.857 1.0
11/28/17 6.54 96.03
4239.77 07/23/18 6.39 4233.38 0.010 0.615 0.012 <0.012 0.034 <0.012 1.34 1.8
12/01/20 6.60 4233.17 0.006 0.194 <0.012 <0.012 0.025 <0.012 1.13 1.3
03/19/21 6.42 4233.35 0.007 0.108 <0.012 <0.012 0.033 <0.012 1.25 2.0
06/10/21 6.25 4233.52 <0.005 0.234 0.015 <0.012 0.046 <0.012 1.29 1.7
09/08/21 5.98 4233.79 <0.005 0.256 0.014 <0.012 0.043 <0.012 0.936 1.5
12/05/21 6.68 4233.09 0.008 0.351 0.026 <0.012 0.086 <0.012 1.13 1.6
06/13/22 5.78 4233.99 0.011 0.719 0.014 <0.012 0.117 <0.012 1.38 1.8
12/24/22 6.07 4233.70 0.009 0.599 0.020 <0.012 0.080 <0.012 8.54 2.7
04/12/24 5.78 4233.99 <0.005 0.966 0.017 <0.012 0.061 <0.012 1.75 3.0
10/21/24 5.63 4234.14 <0.008 0.536 0.012 <0.012 <0.038 <0.012 1.31 3.6
MW-10 11/14/02 2.300 0.130 0.010 <0.002 0.016 0.005 0.3 <0.02
102.75 07/21/05 NM NA
10/02/07 5.83 96.92 0.50 0.098 0.013 <0.002 0.016 <0.002 0.49 0.032
01/19/10 5.77 96.98 0.17 0.19 0.020 <0.002 0.016 <0.002 0.53 0.087
03/10/11 5.35 97.40 0.065 0.123 0.013 <0.001 0.007 <0.002 0.605 <1
08/02/12 5.64 97.11 0.018 0.053 0.008 <0.001 0.003 <0.002 0.711 3.7
01/07/14 5.91 96.84 0.015 0.021 0.002 <0.001 <0.003 <0.002 0.126 <1
11/28/17 7.03 95.72
4239.36 07/23/18 6.02 4233.34 0.028 0.780 0.166 0.052 0.532 <0.012 2.33 1.9
12/01/20 6.11 4233.25 0.030 0.227 0.038 0.020 0.275 <0.012 1.44 2.8
03/21/21 5.80 4233.56 0.024 0.109 0.034 0.045 0.568 <0.012 1.79 3.4
06/10/21 5.64 4233.72 0.024 0.120 0.013 0.032 0.180 <0.012 1.18 2.0
09/08/21 5.43 4233.93 0.030 0.069 0.012 0.029 0.192 <0.012 0.846 1.5
12/06/21 6.01 4233.35 0.025 0.076 <0.012 0.016 0.202 <0.012 0.932 2.0
06/14/22 5.12 4234.24 <0.005 0.102 <0.012 <0.012 0.036 <0.012 0.465 2.8
12/26/22 5.43 4233.93 0.006 0.077 <0.012 <0.012 0.173 <0.012 4.07 2.7
04/12/24 5.14 4234.22 <0.005 0.229 0.016 <0.012 0.151 <0.012 1.09 6.0
10/22/24 5.23 4234.13 <0.008 0.301 0.012 <0.012 0.099 <0.012 0.844 3.3
MW-11 03/23/04 0.240 0.450 0.0082 0.0041 0.018 0.0026 1.5 0.044
102.69 07/21/05 5.12 97.57 0.11 0.32 0.0047 0.0032 0.012 0.017 1.4 0.041
10/02/07 5.29 97.40 0.012 0.091 0.0043 <0.002 0.012 <0.002 0.95 0.041
01/19/10 5.11 97.58 0.0076 0.062 0.0031 <0.002 0.0060 <0.002 0.47 0.13
03/10/11 4.83 97.86 0.004 0.071 <0.001 <0.001 0.018 <0.002 0.545 <1
08/02/12 5.15 97.54 <0.001 0.072 0.003 0.008 0.018 0.007 1.48 2.1
01/07/14 5.37 97.32 0.003 0.031 0.003 0.005 0.013 <0.002 1.17 1.9
11/28/17 5.48 97.21
4239.73 07/25/18 5.54 4234.19 <0.005 0.005 <0.012 <0.012 0.012 <0.012 1.12 1.5
12/01/20 5.69 4234.04 <0.005 0.006 <0.012 <0.012 <0.012 <0.012 1.06 1.5
03/19/21 5.49 4234.24 <0.005 0.005 <0.012 <0.012 <0.012 <0.012 1.00 1.1
06/10/21 5.34 4234.39 <0.005 0.005 <0.012 <0.012 <0.012 <0.012 0.671 <1.0
09/08/21 5.22 4234.51 <0.005 0.007 <0.012 <0.012 <0.012 <0.012 0.538 1.1
12/05/21 5.65 4234.08 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 0.574 <1.0
06/13/22 4.95 4234.78 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 0.296 1.1
12/26/22 5.27 4234.46 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 6.73 1.3
04/11/24 5.10 4234.63 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 0.372 2.1
10/21/24 4.98 4234.75 <0.008 <0.005 <0.012 <0.012 <0.038 <0.012 0.644 1.3
Initial Screening Levels (1)0.2 0.005 1 0.7 10 0.7 1 1
Tier 1 Screening Criteria (1):0.2 0.3 3 4 10 0.7 10 10
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Underwood Environmental Consulting, Inc.
Groundwater Monitoring Report - October 2024
Jacksons #151
278 W. 2100 S., Salt Lake City, UT
Facility ID #4001294, Release Site NYL
WELL/DATE DTW
GW
Elev.MTBE Benzene Toluene
Ethyl-
benzene Xylenes
Naphth-
alene
TPH
(GRO)
TPH
(DRO)ELEV.(feet)(feet)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)
TABLE 1
GROUNDWATER MONITORING DATA
MW-35 12/01/20 6.44 4233.25 <0.005 0.041 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
4239.69 03/21/21 6.23 4233.46 <0.005 0.066 <0.012 <0.012 <0.012 <0.012 0.407 <1.0
06/10/21 6.05 4233.64 <0.005 0.098 <0.012 <0.012 <0.012 <0.012 0.233 <1.0
09/08/21 5.92 4233.77 <0.005 0.099 <0.012 <0.012 <0.012 <0.012 0.228 <1.0
12/06/21 6.54 4233.15 <0.005 0.022 <0.012 <0.012 <0.012 <0.012 0.174 <1.0
06/14/22 5.53 4234.16 <0.005 0.023 <0.012 <0.012 <0.012 <0.012 <0.125 1.1
12/26/22 5.99 4233.70 <0.005 0.012 <0.012 <0.012 <0.012 <0.012 1.40 <1.0
04/12/24 5.72 4233.97 <0.005 0.011 <0.012 <0.012 <0.012 <0.012 <0.125 1.8
10/22/24 5.42 4234.27 <0.008 0.015 <0.012 <0.012 <0.038 <0.012 <0.125 <1.0
MW-36 12/01/20 5.75 4233.70 <0.005 0.010 0.031 <0.012 0.024 <0.012 <0.125 <1.0
4239.45 03/21/21 5.52 4233.93 <0.005 0.257 0.013 0.028 0.052 <0.012 1.00 2.3
06/10/21 5.35 4234.10 <0.005 0.261 0.048 0.031 0.039 <0.012 0.903 <1.0
09/08/21 5.28 4234.17 <0.005 0.217 0.014 0.033 0.150 <0.012 0.632 <1.0
12/06/21 5.74 4233.71 <0.005 0.205 <0.012 0.023 0.052 <0.012 0.504 <1.0
06/14/22 5.03 4234.42 <0.005 0.032 <0.012 <0.012 <0.012 <0.012 <0.125 1.1
12/26/22 5.29 4234.16 <0.005 0.054 <0.012 <0.012 <0.012 <0.012 1.26 <1.0
04/12/24 5.13 4234.32 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 1.7
10/22/24 4.97 4234.48 <0.008 0.045 <0.012 <0.012 <0.038 <0.012 0.210 <1.0
MW-37 12/01/20 6.37 4233.23 0.015 0.800 0.137 0.025 0.365 <0.012 2.81 1.8
4239.60 03/21/21 6.08 4233.52 0.010 2.17 0.121 0.027 0.440 <0.012 4.98 2.7
06/10/21 5.93 4233.67 <0.020 2.29 0.130 <0.050 0.396 <0.050 4.16 2.5
09/08/21 5.72 4233.88 0.012 1.29 0.050 <0.012 0.261 <0.012 3.05 2.3
12/06/21 6.32 4233.28 0.011 2.08 0.110 0.022 0.262 <0.012 3.44 1.4
06/14/22 5.48 4234.12 <0.005 4.09 0.085 0.036 0.413 <0.012 5.75 1.6
12/26/22 5.78 4233.82 <0.005 2.11 0.039 0.020 0.162 <0.012 6.98 1.5
04/12/24 5.47 4234.13 <0.005 3.03 0.045 <0.012 0.219 <0.012 4.13 2.4
10/22/24 5.40 4234.20 <0.008 2.18 0.032 <0.012 0.340 <0.012 3.13 1.1
Initial Screening Levels (1)0.2 0.005 1 0.7 10 0.7 1 1
Tier 1 Screening Criteria (1)0.2 0.3 3 4 10 0.7 10 10
Notes:DTW = Depth to Water NM = Not Measured
GW Elev. = Groundwater Elevation NA = Not Applicable
MTBE = Methyl Tertiary Butyl Ether NE = Not Established
TPH (GRO) = Total Petroleum Hydrocarbons - Gasoline Range Organics < Indicates below given detection limit.
TPH (DRO) = Total Petroleum Hydrocarbons - Diesel Range Organics Bold values are above Initial Screening Levels.
mg/L = Milligrams per Liter Highlighted,bold , values are above Tier 1 Screening Criteria.
(1) DERR, 2005
Underwood Environmental Consulting, Inc.
NORTH
LEGEND:
00 40 80
approximate scale in feet
1 inch ~ 40 feet
MW-2
Monitoring Well
Extraction Well
12/4/2024
Natural Gas
Water Line
G
W
S
(Utility Locations Approximate)
OHP Power or
Overhead Power
SD Storm Drain
CommunicationsC
P
Sanitary Sewer
EW-4
Jacksons #151
278 West 2100 South
Salt Lake City, Utah
Facility ID # 4001294
Release Site NYL
33.85 Groundwater Elev. (ft)
3
4 Groundwater Contour Line
(contour interval = 0.4 ft)
Groundwater
Flow Direction
2100 South
30
0

W
e
s
t
Dispensers
Apartment Building
C-Store
Car Wash
Tank
Cluster
Dispensers
Grass
Gr
a
s
s
Sidewalk
9-
1
0
PL
G
G
P
W
SS
SD
SD
SD
SDSD
C
C
S
C
S
WS
C
WS
FL
P
FH
SD
G
MW-30
MW-1
MW-2
MW-3
MW-4
MW-9
MW-10
MW-11
Piezo-26
MW-12A
P-21R
EW-3
EW-1
EW-2
MW-37
MW-35
MW-36
FIGURE 1
GROUNDWATER
CONTOUR MAP
OCT. 21, 2024
L
I
C
E
NSED P RO F E S SION
A
L
G
E
O
L
O
GISTL
I
C
E
NSED P RO F E S SION
A
L
G
E
O
L
O
GIST
JAMES

A
.
McREEL
JAMES

A
.
McREEL
5420854-2250
33.85
33.54
33.16
34.14
34.13
34.75
34.27
34.48
34.20
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
Underwood Environmental Consulting
Attn: James McReel
9475 North Silver Creek Road
Park City, UT 84098
Work Order: 24J1903
Project: Jacksons #151
10/29/2024
Approved By:
Mark Broadhead, Project Manager
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 12
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
Underwood Environmental Consulting
James McReel
9475 North Silver Creek Road
Park City, UT 84098
PO#:
Receipt:
Date Reported:
Project Name:
NYL-04
10/22/24 14:05 @ 3.1 °C
10/29/2024
Jacksons #151
Sample ID: MW-2
Lab ID: 24J1903-01Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/21/24 13:10
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/24/2410/24/240.005 EPA 8260D/5030BNDBenzene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 10/24/2410/24/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDToluene
mg/L 10/24/2410/24/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/24/2410/24/240.125 EPA 8260B/C /5030A/[CALC]0.214Gasoline Range Organics
Diesel Range
mg/L 10/25/2410/24/241.0 EPA 8015 C1.3Diesel Range Organics
Project Name: Jacksons #151 CtF WO#: 24J1903
www.ChemtechFord.com
Page 2 of 12Page 2 of 12
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
Underwood Environmental Consulting
James McReel
9475 North Silver Creek Road
Park City, UT 84098
PO#:
Receipt:
Date Reported:
Project Name:
NYL-04
10/22/24 14:05 @ 3.1 °C
10/29/2024
Jacksons #151
Sample ID: MW-3
Lab ID: 24J1903-02Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/21/24 13:40
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/24/2410/24/240.005 EPA 8260D/5030B0.008Benzene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 10/24/2410/24/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDToluene
mg/L 10/24/2410/24/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/24/2410/24/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 10/24/2410/24/241.0 EPA 8015 C1.6Diesel Range Organics
Project Name: Jacksons #151 CtF WO#: 24J1903
www.ChemtechFord.com
Page 3 of 12Page 3 of 12
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
Underwood Environmental Consulting
James McReel
9475 North Silver Creek Road
Park City, UT 84098
PO#:
Receipt:
Date Reported:
Project Name:
NYL-04
10/22/24 14:05 @ 3.1 °C
10/29/2024
Jacksons #151
Sample ID: MW-4
Lab ID: 24J1903-03Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/21/24 14:25
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/24/2410/24/240.005 EPA 8260D/5030B0.544Benzene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 10/24/2410/24/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDToluene
mg/L 10/24/2410/24/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/24/2410/24/240.125 EPA 8260B/C /5030A/[CALC]0.835Gasoline Range Organics
Diesel Range
mg/L 10/24/2410/24/241.0 EPA 8015 C1.5Diesel Range Organics
Project Name: Jacksons #151 CtF WO#: 24J1903
www.ChemtechFord.com
Page 4 of 12Page 4 of 12
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
Underwood Environmental Consulting
James McReel
9475 North Silver Creek Road
Park City, UT 84098
PO#:
Receipt:
Date Reported:
Project Name:
NYL-04
10/22/24 14:05 @ 3.1 °C
10/29/2024
Jacksons #151
Sample ID: MW-11
Lab ID: 24J1903-04Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/21/24 15:00
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/24/2410/24/240.005 EPA 8260D/5030BNDBenzene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 10/24/2410/24/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDToluene
mg/L 10/24/2410/24/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/24/2410/24/240.125 EPA 8260B/C /5030A/[CALC]0.644Gasoline Range Organics
Diesel Range
mg/L 10/24/2410/24/241.0 EPA 8015 C1.3Diesel Range Organics
Project Name: Jacksons #151 CtF WO#: 24J1903
www.ChemtechFord.com
Page 5 of 12Page 5 of 12
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
Underwood Environmental Consulting
James McReel
9475 North Silver Creek Road
Park City, UT 84098
PO#:
Receipt:
Date Reported:
Project Name:
NYL-04
10/22/24 14:05 @ 3.1 °C
10/29/2024
Jacksons #151
Sample ID: MW-9
Lab ID: 24J1903-05Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/21/24 15:30
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/24/2410/24/240.005 EPA 8260D/5030B0.536Benzene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 10/24/2410/24/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030B0.012Toluene
mg/L 10/24/2410/24/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/24/2410/24/240.125 EPA 8260B/C /5030A/[CALC]1.31Gasoline Range Organics
Diesel Range
mg/L 10/24/2410/24/241.0 EPA 8015 C3.6Diesel Range Organics
Project Name: Jacksons #151 CtF WO#: 24J1903
www.ChemtechFord.com
Page 6 of 12Page 6 of 12
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
Underwood Environmental Consulting
James McReel
9475 North Silver Creek Road
Park City, UT 84098
PO#:
Receipt:
Date Reported:
Project Name:
NYL-04
10/22/24 14:05 @ 3.1 °C
10/29/2024
Jacksons #151
Sample ID: MW-36
Lab ID: 24J1903-06Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/22/24 11:40
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/24/2410/24/240.005 EPA 8260D/5030B0.045Benzene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 10/24/2410/24/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDToluene
mg/L 10/24/2410/24/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/24/2410/24/240.125 EPA 8260B/C /5030A/[CALC]0.210Gasoline Range Organics
Diesel Range
mg/L 10/25/2410/24/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: Jacksons #151 CtF WO#: 24J1903
www.ChemtechFord.com
Page 7 of 12Page 7 of 12
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
Underwood Environmental Consulting
James McReel
9475 North Silver Creek Road
Park City, UT 84098
PO#:
Receipt:
Date Reported:
Project Name:
NYL-04
10/22/24 14:05 @ 3.1 °C
10/29/2024
Jacksons #151
Sample ID: MW-35
Lab ID: 24J1903-07Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/22/24 12:05
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/24/2410/24/240.005 EPA 8260D/5030B0.015Benzene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 10/24/2410/24/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDToluene
mg/L 10/24/2410/24/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 10/24/2410/24/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 10/24/2410/24/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: Jacksons #151 CtF WO#: 24J1903
www.ChemtechFord.com
Page 8 of 12Page 8 of 12
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
Underwood Environmental Consulting
James McReel
9475 North Silver Creek Road
Park City, UT 84098
PO#:
Receipt:
Date Reported:
Project Name:
NYL-04
10/22/24 14:05 @ 3.1 °C
10/29/2024
Jacksons #151
Sample ID: MW-37
Lab ID: 24J1903-08Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/22/24 13:00
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/24/2410/24/240.100 EPA 8260D/5030B2.18Benzene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 10/24/2410/24/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030B0.032Toluene
mg/L 10/24/2410/24/240.038 EPA 8260D/5030B0.340Xylenes, total
Gasoline Range
mg/L 10/24/2410/24/240.125 EPA 8260B/C /5030A/[CALC]3.13Gasoline Range Organics
Diesel Range
mg/L 10/24/2410/24/241.0 EPA 8015 C1.1Diesel Range Organics
Project Name: Jacksons #151 CtF WO#: 24J1903
www.ChemtechFord.com
Page 9 of 12Page 9 of 12
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
Underwood Environmental Consulting
James McReel
9475 North Silver Creek Road
Park City, UT 84098
PO#:
Receipt:
Date Reported:
Project Name:
NYL-04
10/22/24 14:05 @ 3.1 °C
10/29/2024
Jacksons #151
Sample ID: MW-10
Lab ID: 24J1903-09Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 10/22/24 13:15
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 10/24/2410/24/240.005 EPA 8260D/5030B0.301Benzene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 10/24/2410/24/240.008 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 10/24/2410/24/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 10/24/2410/24/240.012 EPA 8260D/5030B0.012Toluene
mg/L 10/24/2410/24/240.038 EPA 8260D/5030B0.099Xylenes, total
Gasoline Range
mg/L 10/24/2410/24/240.125 EPA 8260B/C /5030A/[CALC]0.844Gasoline Range Organics
Diesel Range
mg/L 10/24/2410/24/241.0 EPA 8015 C3.3Diesel Range Organics
Project Name: Jacksons #151 CtF WO#: 24J1903
www.ChemtechFord.com
Page 10 of 12Page 10 of 12
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
Underwood Environmental Consulting
James McReel
9475 North Silver Creek Road
Park City, UT 84098
PO#:
Receipt:
Date Reported:
Project Name:
NYL-04
10/22/24 14:05 @ 3.1 °C
10/29/2024
Jacksons #151
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.
Project Name: Jacksons #151 CtF WO#: 24J1903
www.ChemtechFord.com
Page 11 of 12Page 11 of 12
Page 12 of 12