DERR-2024-011491

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

GROUNDWATER MONITORING REPORT
MAY 2024

J Oil #5820
(Former Premium Oil #8)
305 South Main St.
Richfield, Utah
DERR Facility ID #2000222
Release Site: GUP

PREPARED BY:

Underwood Environmental Consulting, Inc.
9475 N. Silver Creek Rd.
Park City, Utah 84098

PREPARED FOR:

Jacksons Food Stores
3430 East Commercial Court
Meridian, Idaho 83642

SUBMITTED:

June 13, 2024

1.0 INTRODUCTION

Underwood Environmental Consulting, Inc. (UEC) has been retained by Jacksons Food Stores to
perform groundwater monitoring at J Oil #5820, a fuel station located at 305 South Main St.,
Richfield, Utah (project site) (Figure 1). The project site is referred to as Facility ID #2000222,
Release Site GUP, in Utah Division of Environmental Response and Remediation (DERR) records
and correspondence. The groundwater monitoring is being conducted in response to the
“Additional Sampling Requirements” letter, dated March 15, 2024, from the DERR project
manager.

2.0 BACKGROUND

As stated in the letter referenced above, a petroleum release was reported on May 31, 1991 at the
project site. Since then, underground storage tanks (USTs) have been removed and replaced, and
the site has been redeveloped. Two over-excavations of petroleum impacted soil have occurred,
in 1998 and 2015, as well as numerous subsurface investigations. An old, weathered, monitoring
well network currently exists at the site. Based on the groundwater level data presented on Table
1, the water table appears to have generally declined about 3 to 4 feet during the past eight years
or so. If a reader is inquisitive about this site’s UST compliance or environmental history, they
are welcome to explore e-docs on the Utah DEQ – DERR website. Kindly, search
eqedocs.deq.utah.gov.

The “Additional Sampling Requirements” letter recommended two rounds of groundwater
sampling for gasoline constituents at down-gradient monitoring wells MW-1 and MW-A. It was
also stipulated that if representative groundwater samples could not be collected, due to the decline
in the water table, that MW-1 and/or MW-A should be deepened or replaced (DERR, 2024).

3.0 METHODOLOGY

UEC personnel visited the Richfield project site on April 10, 2024 to assess the condition of
monitoring wells MW-1 and MW-A.

3.1 April 2024 – Findings and Groundwater Monitoring

MW-A was observed to have an adequate 3 foot water column, while MW-1 was found to have
apparent ponded water at the bottom of well casing. MW-A was purged of 3 casing volumes of
groundwater and then sampled for analysis of gasoline constituents in groundwater (MTBE,
BTEXN, and TPH-GRO). MW-1 was also purged, but, was observed to not recharge after about
90 minutes.

Other project site monitor wells were accessed and depth to water measurements collected in an
attempt to determine the groundwater flow direction.

The depth to water measurements are presented on Table 1. A laboratory analytical report for
sample MW-A is provided in the attachments.

A drilling contractor was contacted regarding the potential for deepening MW-1. In the ensuing

conversations, it was concluded that moving over a couple of feet and replacing the well was
preferential to attempting to deepen the well.

3.2 May 2024 – Replacement of MW-1

The drilling contractor, Direct Push Services, mobilized on May 21, 2024 to the Richfield project
site. A replacement well, MW-1R, was installed about two feet away from monitor well MW-1.
Following daylighting via hand auger, the borehole was advanced using a solid drive point so soil
samples were not collected. The new well was installed to a depth of 27 feet below grade and
constructed using 2-inch diameter, pre-pack, screen. Existing well MW-1 was then properly
abandoned using bentonite crumbles and capped at the surface with concrete.

The monitoring well construction details are depicted on the subsurface log provided in the
attachments.

On the following day, May 22nd, newly installed monitor well MW-1R was developed using a 1-
inch diameter submersible pump to remove fines from the casing and well bore. The top-of-casing
(TOC) of the new well was surveyed by differential leveling to establish vertical control.
Monitoring well MW-A, on the adjacent property, was also surveyed to determine relative
elevation.

3.3 May 2024 – Groundwater Sampling of MW-1R

Replacement well MW-1R was purged and sampled on May 28, 2024. The groundwater sample
was placed on ice and delivered to the laboratory for analysis of gasoline constituents (MTBE,
BTEXN and TPH-GRO).

4.0 FINDINGS

4.1 April 2024 - Depth to Water and Flow Direction

Depth to groundwater measurements, deemed representative, were used to calculate relative
groundwater elevations across the site. Figure 1 depicts a groundwater contour map for the site
on April 10, 2024 based on limited data. The groundwater flow direction was determined to be
south-southeast, the same as previously determined.

4.2 Groundwater Analytical Results

The groundwater sample collected from monitoring well MW-A in April contained 0.044
milligrams-per-liter (mg/L) MTBE. No BTEXN or TPH-GRO concentrations were detected at
MW-A.

In May 2024, no MTBE, BTEXN, or TPH-GRO was detected in the groundwater sample collected
from MW-1R.

The laboratory analytical reports and chain of custody documentation are provided in the
appendices.

5.0 CONCLUSIONS

Based on field observations in April-May 2024 and the groundwater analytical results, the
following conclusions are presented:

• MW-A was observed with an ample water column in April 2024 and sampled for gasoline
constituents.

• The general decline in groundwater levels at the site necessitated the replacement of MW-
1.

• The groundwater flow direction in April 2024 was to the south-southeast.

• The groundwater sample collected from MW-A contained 0.044 mg/L MTBE, but, no
BTEXN or TPH-GRO were detected.

• A replacement well, MW-1R, was installed in May 2024.

• No MTBE, BTEXN, or TPH-GRO was detected in groundwater collected from MW-1R.

The next groundwater sampling event of MW-A and MW-1R is tentatively scheduled for October
2024.

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.

Sincerely,
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 Analytical Results
Figure 1 Groundwater Contour Map – April 10, 2024
Log MW-1R
Laboratory Analytical Reports

References Cited:

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, 2024 Additional Sampling Requirements, J Oil #5820, located at 305 South Main
Street, Richfield, Utah, Facility Identification No. 2000222, Release Site
GUP: Utah Division of Environmental Response and Remediation, Salt
Lake City, Utah, March 15, 2024.

Groundwater Monitoring Report - May 2024
J Oil #5820
Richfield, UT
Sample ID/
TOC
DATE Depth to
Water (ft)
GW
Elevation
(ft)
MTBE
(mg/L)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Total
Xylenes
(mg/L)
Naphtha-
lene
(mg/L)
TPH
(GRO)
(mg/L)
TPH
(DRO)
(mg/L)
MW-1 7/12/2005 17.04 82.86 0.159 <0.002 <0.002 <0.002 <0.006 <0.002 <0.50 <0.50
99.90 9/30/2005 16.66 83.24 0.105 <0.002 <0.002 <0.002 <0.006 <0.004 <0.50 <0.50
1/10/2006 18.76 81.14 0.264 <0.002 <0.002 <0.002 <0.006 <0.004 <0.50 <0.50
4/13/2006 19.27 80.63 0.090 <0.002 <0.002 <0.002 <0.013 0.015 <0.50 <0.50
7/7/2006 17.15 82.75 0.169 <0.002 <0.002 <0.002 <0.006 <0.004 <0.50 <0.50
11/6/2006 17.66 82.24 0.226 <0.002 <0.004 <0.004 <0.012 0.003 <0.50 <0.50
3/26/2007 17.67 82.23 0.333 <0.002 <0.002 <0.002 <0.06 0.003 <0.50 <0.50
7/3/2007 16.74 83.16 0.161 <0.002 <0.002 <0.002 <0.06 <0.004 <0.50 <0.50
10/2/2007 16.77 83.13 0.069 <0.002 <0.002 <0.002 <0.006 <0.002 <0.50 <0.50
4/17/2008 17.25 82.65 0.169 <0.001 0.001 <0.001 <0.003 <0.005 0.166 10.6
10/23/2008 16.22 83.68 0.228 <0.001 0.001 <0.001 <0.003 <0.001 0.224 <2.0
4/20/2009 16.66 83.24 0.942 <0.002 <0.002 <0.002 <0.006 <0.002 <0.50 <0.50
10/13/2009 15.98 83.92 0.733 <0.001 <0.001 <0.001 <0.003 0.002 <0.05 <1
3/11/2010 15.38 84.52 0.559 <0.001 <0.001 <0.001 <0.003 <0.002 0.152 <1
9/2/2010 16.10 83.80 0.550 <0.001 <0.001 <0.001 <0.003 0.005 0.321 <1
3/1/2011 17.35 82.55 0.251 0.003 0.014 <0.002 0.014 <0.002 <0.50 <0.50
9/8/2011 15.72 84.18 0.154 <0.002 <0.002 <0.002 <0.006 <0.002 <0.50 <0.50
3/27/2012 16.53 83.37 0.094 <0.001 <0.001 <0.001 <0.003 <0.002 <0.05 <1
8/14/2012 15.90 84.00 0.040 <0.001 <0.001 <0.001 <0.003 <0.002 <0.05 <1
4/10/2013 16.70 83.20 0.037 <0.001 <0.001 <0.001 <0.003 <0.002 <0.05 <1
10/18/2013 16.80 83.10 0.054 <0.001 <0.001 <0.001 <0.003 <0.002 <0.05 <1
3/14/2014 16.64 83.26 0.084 <0.002 <0.002 <0.002 <0.006 <0.002 <0.50 <0.50
9/19/2014 16.03 83.87 0.051 <0.001 <0.005 <0.001 <0.003 <0.005 <0.10 <0.50
99.88 9/24/2015 17.20 82.68 <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
1/19/2016 18.12 81.76 <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
8/19/2016 17.27 82.61 <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
12/1/2017 19.37 80.51
3/8/2018 19.49 80.39
4/10/2024 19.66 80.22
5/21/2024
MW-1R 5/22/2024 20.06 80.01 ----------------
100.07 5/28/2024 19.85 80.22 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 NA
MW-2 7/12/2005 16.20 83.74 0.010 0.003 <0.002 0.004 <0.006 0.002 0.59 <0.50
99.94 9/30/2005 15.70 84.24 0.003 0.002 <0.002 0.004 <0.006 <0.004 0.60 <0.50
1/10/2006 17.77 82.17 <0.002 0.002 <0.002 0.004 <0.006 <0.004 <0.50 1.93
4/13/2006 18.23 81.71 0.005 0.004 <0.002 <0.002 <0.013 0.006 <0.50 1.04
7/7/2006 17.22 82.72 <0.002 0.002 <0.002 0.004 <0.006 0.011 <0.50 2.69
11/6/2006 17.78 82.16 <0.002 0.002 <0.004 0.004 <0.012 0.003 <0.50 1.40
3/26/2007 16.72 83.22 <0.002 <0.002 <0.002 <0.002 <0.06 0.003 <0.50 0.911
7/3/2007 15.70 84.24 <0.002 <0.002 <0.002 <0.002 <0.06 0.003 <0.50 1.3
10/2/2007 15.52 84.42 <0.002 <0.002 <0.004 <0.002 <0.006 0.003 <0.50 0.69
4/17/2008 16.04 83.90 <0.001 0.001 <0.001 <0.001 <0.003 <0.005 0.598 2.3
10/23/2008 14.95 84.99 <0.001 0.001 <0.001 <0.001 <0.003 <0.001 0.187 <2.0
4/20/2009 15.28 84.66 0.005 <0.002 <0.002 <0.002 <0.006 <0.002 <0.50 <0.50
10/13/2009 14.48 85.46 0.086 0.029 <0.001 0.004 <0.003 <0.001 <0.05 <1
3/11/2010 13.90 86.04 <0.001 <0.001 <0.001 <0.001 <0.003 <0.002 0.107 <1
9/2/2010 14.74 85.20 0.005 <0.001 <0.001 <0.001 <0.003 0.005 0.096 <1
3/1/2011 16.25 83.69 <0.002 <0.002 <0.002 <0.002 <0.006 <0.002 <0.50 <0.50
9/8/2011 14.45 85.49 <0.002 <0.002 <0.002 <0.002 <0.006 <0.002 <0.50 <0.50
3/27/2012 15.37 84.57 <0.001 <0.001 <0.001 <0.001 <0.003 <0.002 <0.05 <1
8/14/2012 14.70 85.24 <0.001 <0.001 <0.001 <0.001 <0.003 <0.002 0.076 <1
4/10/2013 15.59 84.35 <0.001 <0.001 <0.001 <0.001 <0.003 <0.002 0.096 <1
10/18/2013 17.06 82.88 <0.001 <0.001 <0.001 <0.001 <0.003 <0.002 0.077 <1
3/14/2014 15.40 84.54 <0.002 <0.002 <0.002 <0.002 <0.006 <0.002 <0.50 <0.50
9/19/2014 14.74 85.20 <0.001 <0.001 <0.005 <0.001 <0.003 <0.005 <0.10 <0.50
99.83 9/24/2015 15.98 83.85 <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
1/19/2016 17.04 82.79 <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 0.153 <1.0
8/19/2016 16.28 83.55 <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
12/1/2017 18.40 81.43 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
3/8/2018 18.55 81.28 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
4/10/2024 19.07 80.76 ----------------
0.2 0.005 1 0.7 10 0.7 1 1
0.2 0.3 3 4 10 0.7 10 10
Not Sampled - Insufficient Water to Sample
Not Sampled - Insufficient Water to Sample
Well Abandoned
Not Sampled - Insufficient Water to Sample
Table 1
Groundwater Analytical Results
J Oil #5820 (Former Premium Oil #8)
Fac. ID #2000222, Release Code GUP
Historical Groundwater Data
Initial Screening Levels
RBCA Tier 1 Screening Criteria
Underwood Environmental Consulting, Inc.1 of 5
Groundwater Monitoring Report - May 2024
J Oil #5820
Richfield, UT
Sample ID/
TOC
DATE Depth to
Water (ft)
GW
Elevation
(ft)
MTBE
(mg/L)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Total
Xylenes
(mg/L)
Naphtha-
lene
(mg/L)
TPH
(GRO)
(mg/L)
TPH
(DRO)
(mg/L)
Table 1
Groundwater Analytical Results
J Oil #5820 (Former Premium Oil #8)
Fac. ID #2000222, Release Code GUP
Hi i l G d DMW-3 7/12/2005 15.50 84.50 0.139 0.24 0.263 0.089 0.448 0.024 4.31 2.08
100.00 9/30/2005 15.04 84.96 0.200 0.26 0.156 0.05 0.281 0.011 2.84 <0.50
1/10/2006 17.14 82.86 0.637 0.039 0.023 0.009 0.017 <0.004 1.01 2.81
4/13/2006 17.47 82.53 0.343 0.003 0.003 <0.004 <0.013 0.003 <0.50 <0.50
7/7/2006 15.40 84.60 0.268 0.112 0.003 0.028 0.039 0.008 <0.50 2.07
11/6/2006 15.50 84.50 0.268 0.066 <0.004 0.028 0.039 0.008 <0.50 1.82
3/26/2007 15.67 84.33 0.057 0.04 <0.002 0.006 0.017 0.003 <0.50 <0.50
7/3/2007 14.35 85.65 0.131 0.104 <0.002 0.011 0.029 <0.004 <0.50 <0.50
10/2/2007 14.30 85.70 0.139 0.013 <0.004 <0.002 <0.006 <0.002 <0.50 0.67
4/17/2008 15.25 84.75 0.065 0.028 <0.001 0.002 0.008 <0.005 0.288 <2.0
10/23/2008 14.00 86.00 0.217 0.184 0.001 0.034 0.016 0.002 0.535 <2.0
4/20/2009 14.45 85.55 0.094 0.017 <0.002 0.002 <0.006 <0.002 <0.50 <0.50
10/13/2009 13.67 86.33 0.086 0.029 <0.001 0.004 <0.003 <0.001 0.194 <1
3/11/2010 13.10 86.90 0.168 0.033 <0.001 0.004 <0.003 <0.002 <1 0.295
9/2/2010 14.03 85.97 0.114 0.014 <0.001 <0.001 <0.003 0.004 0.258 <1
3/1/2011 15.35 84.65 0.076 <0.002 <0.002 <0.002 <0.006 <0.002 <0.50 <0.50
9/8/2011 13.35 86.65 0.166 0.028 <0.002 0.004 <0.006 <0.002 <0.50 <0.50
3/27/2012 14.34 85.66 0.063 <0.001 <0.001 <0.001 <0.003 <0.002 0.231 <1
8/14/2012 13.30 86.70 0.074 0.022 <0.001 0.004 <0.003 <0.002 0.207 <1
4/10/2013 14.72 85.28 0.087 0.019 <0.001 0.005 <0.003 <0.002 0.306 <1
10/18/2013 14.80 85.20 0.044 0.009 <0.001 0.003 <0.003 <0.002 0.251 <1
3/14/2014 ₋₋₋₋
9/19/2014 13.31 86.69 0.076 <0.042 <0.005 0.023 0.0046 <0.005 0.44 1.04
9/24/2015 ₋₋₋₋
MW-3A 7/12/2005 15.40 84.49 <0.004 0.019 <0.002 0.006 <0.006 <0.002 0.52 1.50
99.89 9/30/2005 14.85 85.04 <0.002 0.003 <0.002 <0.002 <0.006 <0.004 <0.50 <0.50
99.76 9/24/2015 14.74 85.02 <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
1/19/2016 15.97 83.79 <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
8/19/2016 14.63 85.13 <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
12/1/2017 17.17 82.59 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
3/8/2018 17.27 82.49 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
4/10/2024 ₋₋₋₋
5/22/2024 18.08 81.68 ----------------
MW-4 7/12/2005 15.20 84.38 0.867 0.286 0.133 0.07 0.224 0.003 1.81 <0.5
99.58 9/30/2005 14.77 84.81 3.110 1.17 0.642 0.269 1.03 <0.200 8.08 <0.50
1/10/2006 16.90 82.68 1.557 0.012 0.006 <0.002 0.011 <0.004 <0.50 1.83
4/13/2006 17.22 82.36 1.023 0.01 <0.002 <0.002 <0.013 <0.002 <0.50 <0.50
7/7/2006 16.14 83.44 1.106 0.014 0.002 0.002 <0.006 <0.004 <0.50 <0.50
11/6/2006 16.56 83.02 2.230 0.032 <0.004 0.005 <0.012 0.003 <0.50 <0.50
3/26/2007 15.28 84.30 1.38 0.008 <0.002 <0.002 <0.006 0.002 <0.50 <0.50
7/3/2007 14.29 85.29 2.15 0.074 <0.002 0.012 0.009 <0.004 <0.50 <0.50
10/2/2007 14.05 85.53 6.01 2.63 0.747 0.21 0.824 0.015 5.99 1.41
4/17/2008 15.00 84.58 2.67 0.082 <0.05 <0.05 <0.15 <0.025 0.271 <2.0
10/23/2008 13.78 85.80 2.27 0.128 <0.001 0.009 0.004 0.004 0.461 <2.0
4/20/2009 14.28 85.30 0.816 0.019 <0.004 <0.004 <0.012 0.018 <0.50 <0.50
10/13/2009 13.59 85.99 2.74 0.026 <0.001 0.003 <0.003 <0.001 <0.05 <1
3/11/2010 12.92 86.66 1.87 0.031 <0.001 0.006 <0.003 <0.002 0.583 <1
9/2/2010 13.85 85.73 <0.001 0.036 <0.001 0.003 <0.003 0.005 1.65 <1
3/1/2011 15.13 84.45 0.526 <0.002 0.004 <0.002 <0.006 <0.002 <0.50 <0.50
9/8/2011 13.15 86.43 3.69 0.11 <0.002 0.024 <0.006 <0.002 <0.50 <0.50
3/27/2012 14.07 85.51 2.24 0.007 <0.001 <0.001 <0.003 <0.002 0.168 <1
8/14/2012 13.06 86.52 1.77 0.101 <0.005 0.021 0.018 <0.01 0.818 <1
4/10/2013 14.40 85.18 1.35 <0.01 <0.01 <0.01 <0.03 0.023 0.878 <1
10/18/2013 14.51 85.07 1.27 0.009 <0.001 0.001 <0.003 <0.002 0.828 <1
3/14/2014 14.37 85.21 0.057 0.02 <0.002 0.004 <0.006 <0.002 <0.50 0.78
9/19/2014 13.31 86.27 2.1 0.052 <0.005 0.007 <0.003 <0.005 1.8 <0.50
9/24/2015 ₋₋₋₋
0.2 0.005 1 0.7 10 0.7 1 1
0.2 0.3 3 4 10 0.7 10 10
Not Located
Initial Screening Levels
RBCA Tier 1 Screening Criteria
Not Sampled
Well Destroyed
Well Destroyed
Underwood Environmental Consulting, Inc.2 of 5
Groundwater Monitoring Report - May 2024
J Oil #5820
Richfield, UT
Sample ID/
TOC
DATE Depth to
Water (ft)
GW
Elevation
(ft)
MTBE
(mg/L)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Total
Xylenes
(mg/L)
Naphtha-
lene
(mg/L)
TPH
(GRO)
(mg/L)
TPH
(DRO)
(mg/L)
Table 1
Groundwater Analytical Results
J Oil #5820 (Former Premium Oil #8)
Fac. ID #2000222, Release Code GUP
Hi i l G d DMW-4R 9/23/2015 14.46 84.83 0.302 0.029 0.048 0.021 0.360 0.005 1.53 1.3
99.29 1/19/2016 Dry --
3/18/2016 15.79 83.50 0.071 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
8/19/2016 14.35 84.94 0.010 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
12/1/2017 16.92 82.37 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
3/8/2018 16.90 82.39 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
4/10/2024 ₋₋₋₋
MW-5 3/1/2004 ₋₋₋₋2.47 2.45 0.017 0.330 1.250 <0.010 9.52 2.55
99.43 7/12/2005 15.62 83.81 1.452 0.644 0.351 0.073 0.399 0.006 2.91 <0.50
9/30/2005 15.15 84.28 3.780 2.16 2.730 0.298 1.520 <0.200 13.4 <0.50
1/10/2006 17.33 82.10 1.278 0.258 0.126 0.02 0.143 <0.004 1.32 2.33
4/13/2006 17.65 81.78 1.175 0.285 0.167 0.032 0.145 0.003 0.67 0.93
7/7/2006 15.60 83.83 3.718 1.077 0.570 0.117 0.586 <0.220 5.72 1.95
11/6/2006 15.93 83.50 4.27 1.28 0.572 <0.220 0.749 0.121 7.74 2.21
3/26/2007 15.82 83.61 6.42 0.971 0.012 0.102 0.123 0.017 1.70 1.41
7/3/2007 14.75 84.68 5.36 1.40 0.093 0.153 0.476 0.026 2.77 0.887
10/2/2007 14.15 85.28 1.39 0.185 <0.022 0.021 0.044 0.014 0.68 0.93
4/17/2008 15.30 84.13 5.23 0.138 <0.05 0.157 0.342 <0.25 2.04 <2.0
10/23/2008 14.15 85.28 5.95 2.68 0.283 0.426 0.783 0.03 5.43 <2.0
4/20/2009 14.27 85.16 0.745 0.326 <0.004 0.052 0.074 0.010 0.70 5.44
10/13/2009 13.58 85.85 2.60 0.562 0.01 0.084 0.049 0.009 0.531 <1
3/11/2010 13.25 86.18 1.96 0.363 0.067 0.051 0.064 0.005 0.843 <1
9/2/2010 14.18 85.25 1.58 0.464 0.014 0.029 0.053 0.006 2.18 <1
3/1/2011 15.45 83.98 0.838 0.007 <0.002 <0.002 <0.006 <0.002 <0.50 <0.50
9/8/2011 13.50 85.93 7.56 2.53 0.034 0.313 1.84 0.037 5.45 3.78
3/27/2012 14.43 85.00 7.56 1.98 0.006 0.212 0.417 0.037 4.74 <1
8/14/2012 13.38 86.05 3.62 1.48 0.010 0.232 0.441 <0.02 10.2 <1
4/10/2013 14.85 84.58 7.80 2.33 <0.05 0.371 0.489 0.134 7.03 <1
10/18/2013 14.85 84.58 2.29 1.02 0.004 0.247 0.325 0.018 4.09 <1
3/13/2014 14.66 84.77 1.40 0.583 0.004 0.014 0.069 0.004 1.55 1.20
9/19/2014 13.50 85.93 2.1 1.1 <0.005 0.24 0.24 0.014 6.8 3.46
9/23/2015 ₋₋₋₋
MW-5R 9/23/2015 14.63 84.80 0.400 0.020 0.031 <0.005 0.184 <0.005 0.977 1.1
99.43 1/19/2016 Dry --
3/18/2016 15.85 83.58 0.084 <0.002 <0.005 <0.005 <0.005 <0.005 0.185 <1.0
8/19/2016 14.48 84.95 0.074 0.004 <0.005 <0.005 <0.005 <0.005 <0.050 1.7
12/1/2017 17.05 82.38 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
3/8/2018 17.01 82.42 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
4/10/2024 18.31 81.12 ----------------
0.2 0.005 1 0.7 10 0.7 1 1
0.2 0.3 3 4 10 0.7 10 10
Not Accessed
Not Sampled
Not Sampled
Well Destroyed
Initial Screening Levels
RBCA Tier 1 Screening Criteria
Underwood Environmental Consulting, Inc.3 of 5
Groundwater Monitoring Report - May 2024
J Oil #5820
Richfield, UT
Sample ID/
TOC
DATE Depth to
Water (ft)
GW
Elevation
(ft)
MTBE
(mg/L)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Total
Xylenes
(mg/L)
Naphtha-
lene
(mg/L)
TPH
(GRO)
(mg/L)
TPH
(DRO)
(mg/L)
Table 1
Groundwater Analytical Results
J Oil #5820 (Former Premium Oil #8)
Fac. ID #2000222, Release Code GUP
Hi i l G d DMW-6 3/1/2004 ₋₋₋₋<0.002 <0.002 <0.002 <0.002 <0.006 <0.002 401 <0.50
100.00 7/12/2005 16.07 83.93 0.306 0.031 <0.002 0.009 <0.006 <0.002 <0.50 <0.50
9/30/2005 15.60 84.40 0.523 0.188 0.005 0.052 0.018 0.008 1.09 <0.50
1/10/2006 17.74 82.26 0.615 0.073 0.002 0.017 0.014 <0.004 0.58 1.97
4/13/2006 18.17 81.83 0.559 0.055 <0.002 0.009 <0.013 <0.002 <0.50 1.06
7/7/2006 16.00 84.00 0.876 0.026 <0.002 0.007 <0.006 <0.004 <0.50 1.68
11/6/2006 16.49 83.51 0.865 0.108 <0.004 0.02 <0.012 0.005 <0.50 2.28
3/26/2007 16.33 83.67 1.08 0.362 0.004 0.052 0.03 0.009 1.04 1.30
7/3/2007 15.31 84.69 1.25 0.332 0.003 0.032 0.02 0.014 0.77 0.986
10/2/2007 15.15 84.85 2.59 0.082 0.008 0.013 0.036 0.004 <0.50 1.01
4/17/2008 15.95 84.05 1.40 0.590 <0.01 <0.01 <0.03 <0.05 3.94 2.3
10/23/2008 14.78 85.22 0.992 1.25 0.010 0.282 0.128 0.112 2.93 <2.0
4/20/2009 15.27 84.73 0.633 0.357 <0.004 0.024 0.027 0.050 0.83 6.66
10/13/2009 14.47 85.53 0.912 0.863 0.007 0.226 0.031 0.103 1.26 1.3
3/11/2010 13.76 86.24 0.850 1.19 0.006 0.156 0.064 0.091 <0.05 <1
9/2/2010 14.70 85.30 <0.001 0.156 <0.001 0.019 0.003 0.015 0.907 <1
3/1/2011 16.00 84.00 0.499 0.773 0.004 0.06 0.029 0.034 1.52 2.14
9/8/2011 14.10 85.90 0.538 0.788 0.009 0.277 0.027 0.114 2.08 4.24
3/27/2012 14.90 85.10 1.14 0.942 <0.001 0.067 <0.003 0.092 2.01 <1
8/14/2012 14.20 85.80 1.06 0.232 <0.005 0.022 <0.015 0.013 1.53 <1
4/10/2013 14.98 85.02 2.03 0.880 <0.02 0.048 <0.06 0.076 2.54 <1
10/18/2013 15.25 84.75 1.27 0.369 0.002 0.036 <0.03 0.027 1.55 1
3/14/2014 15.19 84.81 1.41 0.451 0.004 0.03 0.007 0.016 1.75 1.74
9/19/2014 14.22 85.78 1.1 0.57 <0.005 0.1 0.004 0.046 1.8 1.55
99.95 9/24/2015 15.64 84.31 1.63 <0.002 <0.005 <0.005 <0.005 <0.005 1.62 <1.0
1/19/2016 16.81 83.14 0.642 0.039 <0.005 <0.005 <0.005 <0.005 1.07 <1.0
8/19/2016 15.61 84.34
MW-6R 8/19/2016 15.39 84.33 1.05 0.018 <0.005 <0.005 <0.005 <0.005 0.786 <1.0
99.72 12/1/2017 17.84 81.88 0.118 0.177 <0.012 <0.012 <0.012 <0.012 1.04 <1.0
3/8/2018 17.99 81.73 0.019 0.047 <0.012 <0.012 <0.012 <0.012 0.246 <1.0
4/10/2024 19.05 80.67 ----------------
MW-7 9/30/2005 16.45 83.55 0.009 <0.002 <0.002 <0.002 <0.006 <0.004 <0.50 <0.50
100.00 4/13/2006 18.09 81.91 0.020 <0.002 <0.002 <0.004 <0.13 <0.002 <0.50 <0.50
9/24/2015 15.70 84.30 <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
1/19/2016 16.84 83.16 <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
8/19/2016 15.38 84.62 <0.005 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
12/1/2017 17.98 82.02 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
3/8/2018 18.12 81.88 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
4/10/2024 18.99 81.01 ----------------
0.2 0.005 1 0.7 10 0.7 1 1
0.2 0.3 3 4 10 0.7 10 10
Well Abandoned
Initial Screening Levels
RBCA Tier 1 Screening Criteria
Underwood Environmental Consulting, Inc.4 of 5
Groundwater Monitoring Report - May 2024
J Oil #5820
Richfield, UT
Sample ID/
TOC
DATE Depth to
Water (ft)
GW
Elevation
(ft)
MTBE
(mg/L)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Total
Xylenes
(mg/L)
Naphtha-
lene
(mg/L)
TPH
(GRO)
(mg/L)
TPH
(DRO)
(mg/L)
Table 1
Groundwater Analytical Results
J Oil #5820 (Former Premium Oil #8)
Fac. ID #2000222, Release Code GUP
Hi i l G d DMW-A 6/10/2009 13.00 ₋₋<0.002 <0.002 <0.002 <0.002 <0.006 <0.002 <0.50 <0.50
3/11/2010 12.13 ₋₋<0.001 <0.001 <0.001 <0.001 <0.003 <0.002 <0.05 <1
9/2/2010 12.75 ₋₋0.004 <0.001 <0.001 <0.001 <0.003 0.006 <0.05 <1
3/1/2011 14.80 ₋₋<0.002 <0.002 <0.002 <0.002 <0.006 <0.002 <0.05 <0.05
9/8/2011 12.37 ₋₋0.020 <0.002 <0.002 <0.002 <0.006 <0.002 <0.50 <0.05
3/27/2012 13.27 ₋₋<0.001 <0.001 <0.001 <0.001 <0.003 <0.002 <0.05 <1
8/14/2012 12.62 ₋₋0.033 <0.001 <0.001 <0.001 <0.003 <0.002 <0.05 <1
4/10/2013 12.19 ₋₋0.003 <0.001 <0.001 <0.001 <0.003 <0.002 <0.05 <1
10/28/2013 13.39 ₋₋0.037 <0.001 <0.001 <0.001 <0.003 0.003 <0.05 <1
3/14/2014 13.21 ₋₋<0.002 <0.002 0.002 <0.002 <0.006 <0.002 <0.50 <0.50
9/19/2014 12.80 ₋₋0.056 <0.001 <0.005 <0.001 <0.003 <0.005 <0.10 <0.50
9/24/2015 13.81 ₋₋0.247 <0.002 <0.005 <0.002 <0.005 <0.005 0.145 <1.0
1/19/2016 14.57 ₋₋0.031 <0.002 <0.005 <0.005 <0.005 <0.005 <0.050 <1.0
8/19/2016 13.8 --0.248 <0.002 <0.005 <0.002 <0.005 <0.005 0.192 <1.0
12/1/2017 15.78 --0.194 <0.005 <0.012 <0.012 <0.012 <0.012 0.194 <1.0
3/8/2018 15.95 --0.132 <0.005 <0.012 <0.012 <0.012 <0.012 0.132 <1.0
95.27 4/10/2024 16.65 78.62 0.044 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 NA
## GW-1 9/14/2015 ----0.168 0.432 2.67 0.692 4.45 0.224 16.9 9.9
0.2 0.005 1 0.7 10 0.7 1 1
0.2 0.3 3 4 10 0.7 10 10
Notes
MTBE - methyl tertiary-butyl ether NA = Not analyzed
TPH-GRO - total petroleum hydrocarbons gasoline range organics
TPH-DRO - total petroleum hydrocarbons diesel range organics
BOLD values indicate levels above Tier 1 Screening Levels (DERR, 2005)
Blue shade - indicates concentrations above ISL's (DERR, 2005)
## - Sample considered not representative due to dissolution from disturbed soil
Initial Screening Levels
Tier 1 Screening Criteria
September 2015 Soil Abatement Event
Underwood Environmental Consulting, Inc.5 of 5
J Oil #5820 (former Premium Oil #8)
305 South Main Street
Richfield, Utah 84701
Facility ID #2000222
00 15 30 6045
approx scale in feet
NORTH
LEGEND
By:
JAM
G Natural Gas Line
Canopy
300 South
Ma
i
n

S
t
r
ee
t
J Oil #5820
(Former Premium Oil
#8 Store)
305 South Main Street
Sidewalk
12
,
0
0
0

D
i
e
s
e
l
12
,
0
0
0

P
r
e
m
i
u
m
15
,
0
0
0

U
n
l
e
a
d
e
d
Residence
Dumpster
Pawn Shop
Concrete Driveway
Gravel Area
Shed
Shed
Current Property Boundary
Over-ExcavationArea
Sewer Lateral
Water Line
MW-2
B-7 Boring
Monitoring Well with groundwater elevation (ft)
Groundwater contour line (contour interval = 0.5 ft)
Groundwater Contour Map
April 10, 2024
FIGURE 1Date:
June 12, 2024
80.76
G
MW-6
(GP-Y)
Abandoned
MW-6R
MW-2
MW-4
(Removed)
MW-5
(GP-X)
(Removed)
MW-3
(Removed)
MW-3A
MW-5R MW-4R
MW-7B-1
B-2
B-3
B-4
B-5
B-6
B-7
B-8
B-7 B-9
MW-A
MW-1R
MW-1
Abandoned
L
I
C
E
NSED P R O F E S SIONA
L
G
E
O
L
OGISTL
I
C
E
NSED P R O F E S SIONA
L
G
E
O
L
OGIST
JAMES

A
.
McREEL
JAMES

A
.
McREEL
5420854-2250
80.76
81.12
80.67
81.01
78.62
10
15
20
25
30
10
15
20
25
30
HOLE NO.
DRILLING METHOD ____________________________________________ SAMPLER TYPE _____________________________________________________
DRILLER / COMPANY ___________________________________________ TOTALDEPTH ____________ WATER DEPTH _______
BORING DIAMETER _________ CASING DIAMETER _________ CASING MATERIAL ____________ SLOT SIZE __________
SURFACE ELEV. ____________ TOPOF CASING ELEV. ___________ LOGGED BY _____________________________________________
DATE ___________________
TIME STARTED _________
WEATHER _______________
SHEET _____ OF _______
PROJECT ________________________________
OWNER ________________________________
LOCATION _______________________________
DE
P
T
H

(

F
T
.)
SA
M
P
L
E
S
SA
M
P
L
E
IN
T
E
R
V
A
L
DESCRIPTION / SOILCLASSIFICATION
DE
P
T
H
5 5
SUBSURFACE
LOG
GRAPHIC
LOG / WELL
CONST.
UNIFIED
SOIL
CLASS.
SYSTEM
PID
READINGS
(UNITS)
MW-1R5/21/24
J Oil #5820
Jacksons Companies
305 S. Main St., Richfield, UT
Sunny
27'20.05’(5/21/24)
Direct Push
Direct Push Services
none
4.25"
JAM
2"
~5,320'
Pre-pack 0.01
0-4
CONCRETE
PEAGRAVEL HandAuger to 4 Feet
CL
SILTY CLAY; reddish brown (5YR 4/4), high plasticity, very moist
Continue push with solid point
(no cuttings or samples)
EOB @ 27 ft
100.07'
be
n
t
o
n
i
t
e
se
a
l
silica
sand
20/40,
10/20
2"
d
i
a
m
e
t
e
r
,
pr
e
-
p
a
c
k
,

0
.
0
1
”

s
l
o
t
TD = 27'
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: 24D0889
Project: J Oil #5820
4/17/2024
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 4
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:
GUP
4/11/24 8:41 @ 4.2 °C
4/17/2024
J Oil #5820
Sample ID: MW-A
Lab ID: 24D0889-01Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 4/10/24 14:50
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 4/11/244/11/240.005 EPA 8260D/5030BNDBenzene
mg/L 4/11/244/11/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 4/11/244/11/240.005 EPA 8260D/5030B0.044Methyl tert-Butyl Ether (MTBE)
mg/L 4/11/244/11/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 4/11/244/11/240.012 EPA 8260D/5030BNDToluene
mg/L 4/11/244/11/240.012 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 4/11/244/11/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Project Name: J Oil #5820 CtF WO#: 24D0889
www.ChemtechFord.com
Page 2 of 4Page 2 of 4
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:
GUP
4/11/24 8:41 @ 4.2 °C
4/17/2024
J Oil #5820
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: J Oil #5820 CtF WO#: 24D0889
www.ChemtechFord.com
Page 3 of 4Page 3 of 4
Page 4 of 4
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: 24E2138
Project: J Oil #5820 - Richfield
6/5/2024
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 4
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:
GUP
5/28/24 15:38 @ 1.7 °C
6/5/2024
J Oil #5820 - Richfield
Sample ID: MW-1R
Lab ID: 24E2138-01Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 5/28/24 11:55
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 6/3/246/3/240.005 EPA 8260D/5030BNDBenzene
mg/L 6/3/246/3/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 6/3/246/3/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 6/3/246/3/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 6/3/246/3/240.012 EPA 8260D/5030BNDToluene
mg/L 6/3/246/3/240.012 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 6/3/246/3/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Project Name: J Oil #5820 - Richfield CtF WO#: 24E2138
www.ChemtechFord.com
Page 2 of 4Page 2 of 4
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:
GUP
5/28/24 15:38 @ 1.7 °C
6/5/2024
J Oil #5820 - Richfield
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: J Oil #5820 - Richfield CtF WO#: 24E2138
www.ChemtechFord.com
Page 3 of 4Page 3 of 4
Page 4 of 4