DERR-2024-013228

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

GROUNDWATER MONITORING REPORT
November 2024

Work Plan OBD-04
December 28, 2024

West Winds Truck Stop
1085 East Main Street
Green River, Utah
Facility ID #5000275, Release Site OBD

Submitted To:

General Manager
Yardley Green River, LLC
P.O. Box 570
Green River, Utah 84525

Copy To:

Mr. Alex Thompson
Department of Environmental Quality
Division of Environmental Response and Remediation
P.O. Box 144840
Salt Lake City, Utah 84114-4840

Groundwater Monitoring Report – November 2024
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID #5000275, Release Site OBD

Underwood Environmental Consulting, Inc.
1

1.0 INTRODUCTION

Underwood Environmental Consulting, Inc. (UEC) has been retained by West Winds
Development to perform groundwater monitoring and a free product recovery test at the West
Winds Truck Stop (owned and operated by Yardley Green River, LLC). The project site, located
at 1085 East Main Street, Green River, Utah, includes a convenience store, retail and commercial
fueling facilities, repair shop, restaurant and motel (Figure 1). The groundwater monitoring event
was conducted to assess groundwater conditions at the truck stop. The product recovery test was
conducted to observe rebound following extraction of free product from monitor wells where
observed. 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 #5000275, Release Site OBD.

2.0 BACKGROUND

Release OBD was opened based upon the reported findings of a Phase II Environmental Site
Assessment (ESA) performed by Broadbent and Associates, Inc. for Pilot Travel Centers. The
Phase II ESA reported several soil and groundwater samples with hydrocarbon concentrations in
excess of Utah Initial Screening Levels (ISLs) (Broadbent, 2021).

UEC performed a subsurface investigation at the site in October – November 2021. At that time,
four existing monitoring wells were encountered around the commercial dispenser canopy
perimeter. The existing monitoring wells were apparently installed in 1994 and have been
designated as MW-NW, MW-NE, MW-SW, and MW-SE. During the groundwater sampling
event associated with the investigation, free product was observed at monitoring well MW-SE
(Table 1; Figure 1). The source of free product observed appeared to be the result of surface spills
and maintenance practices at the commercial dispenser area (UEC, 2021).

During groundwater sampling in November 2021, free product was also observed at newly
installed monitoring well MW-7 (Table 1; Figure 1). The source of free product observed at this
location remains unclear. The extent of hydrocarbon impacts in the subsurface remains undefined
to the north, east, and south-southeast of MW-7 (UEC, 2021; UEC, 2023).

3.0 METHODOLOGY

3.1 Product Recovery Test

Sump and Trap Cleaning, LLC was contracted to remove fluids (groundwater and free product)
from select monitoring wells at the site. Based on gauging of water levels and free product
thicknesses, four monitoring wells (MW-2, MW-6, MW-7, and MW-SE) were utilized. The
vacuum truck removed 337 gallons of fluid (fuel and water) from four wells. High-Vacuum was
applied to each well for approximately 10 to 40 minutes, dependent upon well yield. Following
Groundwater Monitoring Report – November 2024
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID #5000275, Release Site OBD

Underwood Environmental Consulting, Inc.
2
vacuum extraction, water level and product thickness measurements were collected over time to
ascertain the degree of product recovery in each well. The results are presented below.

3.2 Groundwater Monitoring

On November 6, 2024, water levels were measured in eleven monitoring wells using an electronic
water level indicator or interface probe. The monitor wells, lacking substantial free product, were
subsequently purged of three casing volumes of water on November 7th prior to sampling. A
separate disposable bailer was utilized to sample 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
8260B/C, 8260D, and 8015C.

4.0 RESULTS

4.1 Product Recovery Observation

Prior to high-vacuum extraction, measurable free product was measured at 4.37 feet, 1.86 feet,
0.46 feet, and 0.01 feet in thickness at MW-SE, MW-7, MW-2, and MW-6, respectively.
Following fluids extraction, product recovery occurred readily at MW-SE and MW-7. Product
recovery at MW-2 and MW-6 was minimal. Figure 2 below depicts product recovery versus time
at three monitoring wells.

0.46 0.01 0.01 0.06
4.37
1.36
3.55 3.26
1.86
1.07
1.28 1.09
0
0.51
1.52
2.53
3.54
4.55
Fr
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e

P
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o
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u
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t

T
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i
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k
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e
s
s

(
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)
Date
Figure 2 -Product Recovery Test
MW-2 MW-SE MW-7
Groundwater Monitoring Report – November 2024
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID #5000275, Release Site OBD

Underwood Environmental Consulting, Inc.
3
Maximum product recovery was observed in approximately six days’ time at MW-SE and MW-
7. The recovery rates observed exceed typical, suggesting that ample free product is available in
the subsurface environment to be recovered. The lack of observed product recovery at MW-2,
suggests that there is not much product in that vicinity. MW-6 serves as a boundary between
differing product plumes.

Based on the product recovery test (Figure 2) and the depictions below, continuance of product
recovery via vacuum truck appears justified.

*****

MW-2 before extraction. MW-7 22 hr after ext. MW-SE 21 hr after ext. 11-6-2024 11-8-2024 11-8-2024

4.2 Depth to Water and Flow Direction

On November 6, 2024, the depth to groundwater ranged from 7.38 to 11.72 feet below top-of-
casing (TOC) (Table 1). Figure 1 depicts a groundwater contour map for the project site on the
same date. The groundwater elevations at the three or four wells containing free product were
corrected by applying Archimedes principle and an assumed specific gravity of 0.85 for diesel
fuel. Based on the measured and calculated groundwater elevations, the groundwater flow
direction was determined to be south-southeast.

4.3 Groundwater Analytical Results

Seven monitoring wells were purged and sampled on November 7, 2024. The groundwater
analytical results presented on Table 1 are compared with Initial Screening Levels (ISLs) and Tier
1 Levels (DERR, 2005).

Of the seven groundwater monitoring wells sampled, two wells exceeded the ISL for benzene.
The highest benzene concentration detected in groundwater was 0.015 mg/L at MW-SW. No
TPH-DRO or TPH-GRO concentrations were detected in the seven wells sampled (Table 1).

No hydrocarbon concentrations were detected in groundwater at MW-1, MW-4, MW-5, MW-NW,
and MW-NE (Table 1).

Groundwater Monitoring Report – November 2024
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID #5000275, Release Site OBD

Underwood Environmental Consulting, Inc.
4
The laboratory analytical reports for the November 2024 groundwater monitoring event are
provided as an attachment.

5.0 CONCLUSIONS

Based on field observations, free product recovery checks, and the November 2024 groundwater
analytical results, the following conclusions are presented:

• Depth to groundwater ranged from approximately 7.3 to 11.7 feet below top of well casing.

• The groundwater flow direction was determined to be south-southeast.

• The ISL for benzene was exceeded at two well locations. The highest benzene
concentration detected in groundwater was 0.015 mg/L at MW-SW.

• No TPH-GRO or TPH-DRO was detected in the seven wells sampled.

• Free product was observed at four monitoring well locations. The greatest free product
thickness observed was 4.37 feet at MW-SE.

• The free product recovery test indicated rapid product recovery at MW-SE and MW-7.
Product recovery at MW-2 was observed to be marginal.

• The extent of hydrocarbon impacts north, east, and southeast of MW-7 remains unknown.
Additional monitoring wells are necessary to define the extent.

Based on the conclusions above:

1) UEC will continue groundwater monitoring in May 2025, and

2) UEC recommends continued free product recovery utilizing vacuum truck extraction at
MW-SE, MW-7, and MW-2.

Upon your approval, UEC will attempt to schedule an additional vacuum truck run coincident with
the next groundwater monitoring event.

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
Groundwater Monitoring Report – November 2024
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID #5000275, Release Site OBD

Underwood Environmental Consulting, Inc.
5
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 Monitoring Data
Figure 1 Groundwater Contour Map – November 6, 2024
Figure 2 Product Recovery Test
Non-Hazardous Waste Manifest
Laboratory Analytical Reports

Groundwater Monitoring Report – November 2024
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID #5000275, Release Site OBD

Underwood Environmental Consulting, Inc.
6

References Cited:

Broadbent, 2021 Limited Phase II Environmental Site Assessment, Pilot Travel Center #892,
1085 East Main Street, Green River, Utah: Broadbent and Associates, Inc.,
Draper, Utah, June 1, 2021.

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.

UEC, 2021 Subsurface Investigation Report, Release OBD, West Winds Truck Stop,
1085 East Main Street, Green River, Utah, Facility ID #5000275, Release
Site OBD: Underwood Environmental Consulting, Inc., Park City, Utah,
December 6, 2021.

UEC, 2023 Groundwater Monitoring Report – September 2023, Work Plan OBD-02,
West Winds Truck Stop, 1085 East Main Street, Green River, Utah, Facility
ID #5000275, Release Site OBD: Underwood Environmental Consulting,
Inc., Park City, Utah, October 29, 2023.
Groundwater Monitoring Report - November 2024
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID 5000275, Release Site OBD
WELL/DATE DTW FPT
GW
Elev.MTBE Benzene Toluene
Ethyl-
benzene Xylenes
Naphth-
alene
TPH
(GRO)
TPH
(DRO)ELEV.(feet)(feet)(feet)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)
MW-NW 11/03/21 7.14 92.40
99.54 05/10/22 7.73 91.81 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
08/16/22 8.00 91.54 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
11/08/22 7.88 91.66 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
02/12/23 8.26 91.28 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
09/17/23 8.31 91.23 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
03/17/24 8.48 91.06 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
11/07/24 8.41 91.13 <0.008 <0.005 <0.012 <0.012 <0.038 <0.012 <0.125 <1.0
MW-NE 11/03/21 6.33 92.86
99.19 05/10/22 7.15 92.04 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
08/16/22 7.40 91.79 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
11/08/22 7.37 91.82 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
02/12/23 7.89 91.30 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
09/17/23 7.73 91.46 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
03/17/24 8.06 91.13 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
11/07/24 7.64 91.55 <0.008 <0.005 <0.012 <0.012 <0.038 <0.012 <0.125 <1.0
MW-SW 11/04/21 7.30 92.02 <0.005 <0.005 <0.012 <0.012 <0.012 0.013 <0.125 <1.0
99.32 05/10/22 7.76 91.56 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
08/16/22 7.83 91.49 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
11/08/22 7.84 91.48 <0.005 0.012 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
02/12/23 8.20 91.12 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
09/17/23 8.24 91.08 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
03/17/24 8.43 90.89 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
11/07/24 8.46 90.86 <0.008 0.015 <0.012 <0.012 <0.038 <0.012 <0.125 <1.0
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
continued next page
TABLE 1
GROUNDWATER MONITORING DATA
Not Sampled
Not Sampled
Underwood Environmental Consulting, Inc.
Groundwater Monitoring Report - November 2024
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID 5000275, Release Site OBD
WELL/DATE DTW FPT
GW
Elev.MTBE Benzene Toluene
Ethyl-
benzene Xylenes
Naphth-
alene
TPH
(GRO)
TPH
(DRO)ELEV.(feet)(feet)(feet)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)
TABLE 1
GROUNDWATER MONITORING DATA
MW-SE 11/03/21 8.34 1.4 91.93
99.08 05/10/22 8.12 0.86 91.69
08/15/22 10.67 3.74 91.59
11/07/22 11.08 4.15 91.53
02/11/23 11.92 4.61 91.08
09/16/23 11.41 4.14 91.19
03/16/24 12.42 4.98 90.89
11/06/24 11.72 4.37 91.07
MW-1 11/03/21 8.70 91.30 <0.005 0.013 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
100.00 05/10/22 8.81 91.19 <0.005 0.029 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
08/15/22 8.90 91.10 <0.005 0.056 <0.012 <0.012 0.013 <0.012 <0.125 <1.0
11/07/22 8.86 91.14 <0.005 0.008 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
02/11/23 8.91 91.09 <0.005 0.008 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
09/16/23 9.32 90.68 <0.050 10.3 0.536 2.13 2.32 0.242 17.8 2.7
03/17/24 9.24 90.76 <0.005 0.141 <0.012 <0.012 0.115 0.027 0.657 <1.0
11/07/24 9.71 90.29 <0.008 <0.005 <0.012 <0.012 <0.038 <0.012 <0.125 <1.0
MW-2 11/03/21 8.20 91.29 <0.005 0.128 0.076 0.074 0.226 0.019 1.38 <1.0
99.49 05/10/22 8.35 91.14 <0.005 0.064 <0.012 <0.012 0.014 <0.012 <0.125 <1.0
08/15/22 8.32 91.17 <0.005 0.108 <0.012 0.030 0.032 <0.012 0.364 <1.0
11/07/22 8.30 91.19 <0.005 0.060 <0.012 <0.012 0.020 <0.012 <0.125 <1.0
02/11/23 8.47 91.02 <0.005 9.58 0.012 0.016 0.095 <0.012 9.69 1.3
09/16/23 8.73 90.76 <0.005 4.77 0.027 0.028 1.83 0.016 6.90 3.8
03/17/24 8.82 90.67 <0.005 3.02 0.028 0.927 1.07 0.290 7.45 5.8
11/06/24 9.60 0.46 90.28
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
continued next page
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Underwood Environmental Consulting, Inc.
Groundwater Monitoring Report - November 2024
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID 5000275, Release Site OBD
WELL/DATE DTW FPT
GW
Elev.MTBE Benzene Toluene
Ethyl-
benzene Xylenes
Naphth-
alene
TPH
(GRO)
TPH
(DRO)ELEV.(feet)(feet)(feet)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)
TABLE 1
GROUNDWATER MONITORING DATA
MW-3 11/03/21 7.89 91.38 <0.005 0.025 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
99.27 05/10/22 8.07 91.20 <0.005 0.034 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
08/15/22 8.02 91.25 <0.005 0.021 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
11/07/22 8.07 91.20 <0.005 0.007 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
02/11/23 8.31 90.96 <0.005 0.006 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
09/16/23 8.51 90.76 <0.005 0.106 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
03/17/24 8.65 90.62 <0.005 0.013 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
11/07/24 8.90 90.37 <0.008 0.014 <0.012 <0.012 <0.038 <0.012 <0.125 <1.0
MW-4 11/03/21 8.64 90.79 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
99.43 05/10/22 8.80 90.63 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
08/15/22 8.39 91.04 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
11/07/22 8.64 90.79 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
02/11/23 8.81 90.62 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
09/16/23 9.07 90.36 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
03/17/24 9.14 90.29 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
11/07/24 9.52 89.91 <0.008 <0.005 <0.012 <0.012 <0.038 <0.012 <0.125 <1.0
MW-5 11/03/21 7.00 91.99 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
98.99 05/10/22 7.46 91.53 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
08/15/22 7.48 91.51 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
11/08/22 7.58 91.41 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
02/11/23 7.98 91.01 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
09/16/23 7.95 91.04 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
03/17/24 8.2 90.79 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
11/07/24 8.15 90.84 <0.008 <0.005 <0.012 <0.012 <0.038 <0.012 <0.125 <1.0
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
continued next page
Underwood Environmental Consulting, Inc.
Groundwater Monitoring Report - November 2024
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID 5000275, Release Site OBD
WELL/DATE DTW FPT
GW
Elev.MTBE Benzene Toluene
Ethyl-
benzene Xylenes
Naphth-
alene
TPH
(GRO)
TPH
(DRO)ELEV.(feet)(feet)(feet)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)
TABLE 1
GROUNDWATER MONITORING DATA
MW-6 11/04/21 6.14 92.64 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 <1.0
98.78 05/10/22 6.87 0.01 91.92 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 5.0
08/16/22 7.06 sheen 91.72 <0.005 <0.005 <0.012 <0.012 <0.012 0.027 0.852 159
11/08/22 7.07 0.00 91.71 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 1.5
02/12/23 7.61 0.01 91.18 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 13.6
09/16/23 7.87 trace 90.91 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 4.7
03/17/24 7.80 0.01 90.99 <0.005 <0.005 <0.012 <0.012 <0.012 <0.012 <0.125 1.9
11/06/24 7.38 0.01 91.41
MW-7 11/04/21 6.38 0.03 92.46 <0.005 <0.005 <0.012 0.040 0.078 0.084 2.15 31.8
98.81 05/10/22 8.13 1.41 91.88
08/15/22 8.54 1.72 91.73
11/07/22 8.66 1.78 91.66
02/11/23 10.40 3.18 91.11
09/16/23 9.45 2.35 91.36
03/16/24 10.76 3.43 90.97
11/06/24 8.96 1.86 91.43
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:Arbitrary datum of 100.00 feet established on site.MTBE = Methyl Tertiary Butyl Ether
DTW = Depth to Water TPH (GRO) = Total Petroleum Hydrocarbons - Gasoline Range Organics
FPT = Free Product Thickness TPH (DRO) = Total Petroleum Hydrocarbons - Diesel Range Organics
GW Elev. = Groundwater Elevation < Indicates below given detection limit.
GW Elev. Correction = (Well Elev.-DTW)+(0.85*FPT).Bold values are above Initial Screening Levels.
(1) DERR, 2005 Highlighted,bold , values are above Tier 1 Screening Criteria.
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Not Sampled
Underwood Environmental Consulting, Inc.
LEGEND
Approx. Scale
one inch ~ 75 feet
00 75
NORTH
West Winds
Truck Stop
1085 E. Main St.
Green River, Utah
Facility ID #5000275
Release Site OBD
S
S
S
SD
SD
W
W
W
W
?
?
FH
C
P
P
OH
P
USTs
Water LineW
S
(Utility Locations Approximate)
SD Storm Drain
Communications
PowerPOHP
C
Sanitary Sewer
Main

S
t
r
e
e
t
Sidewa
l
k
C-Store
Repair
Shop
Sc
a
l
e
Di
t
c
h
Overflow
Parking
Tire
Storage
Retail Dispens
e
r
s
Commercial Dispensers
filled in place
UL
UL
D
asp
h
a
l
t
con
c
r
e
t
e
Canopy
Canopy
Restaurant
Field
Dominion Energy
Pipeline Facility
FIGURE 1
GROUNDWATER
CONTOUR MAP
NOV. 6, 2024
12/11/24
2-Inch Monitoring Well
MW-1
4-Inch Monitoring Well
MW-NE
90.29 Groundwater Elev. (ft)
9
1
Groundwater Contour Line
(contour interval = 0.4 ft)
Groundwater
Flow Direction
Groundwater Elevations Corrected for Presence of Free Product
2.35 Free Product
Thickness (ft)
MW-2 MW-3
MW-4
MW-1
MW-6
MW-7
MW-5
MW-NE
MW-NW
MW-SW MW-SE
1.86
4.37
L
I
C
E
NSED PR O F E S SIONAL
G
E
O
L
O
GISTL
I
C
E
NSED PR O F E S SIONAL
G
E
O
L
O
GIST
JAMES

A
.
McREEL
JAMES

A
.
McREEL
5420854-2250
91.13
91.55
90.86 91.07
90.29
90.28 90.37
89.91
90.84
91.41
91.430.01
0.46
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: 24K0639
Project: West Winds
11/15/2024
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 10
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:
OBD-04
11/8/24 13:38 @ 2.0 °C
11/15/2024
West Winds
Sample ID: MW-1
Lab ID: 24K0639-01Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/7/24 9:15
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 11/12/2411/12/240.005 EPA 8260D/5030BNDBenzene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-C11/12/2411/12/240.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDToluene
mg/L 11/12/2411/12/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 11/12/2411/12/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/13/2411/13/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds CtF WO#: 24K0639
www.ChemtechFord.com
Page 2 of 10Page 2 of 10
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:
OBD-04
11/8/24 13:38 @ 2.0 °C
11/15/2024
West Winds
Sample ID: MW-3
Lab ID: 24K0639-02Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/7/24 9:45
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 11/12/2411/12/240.005 EPA 8260D/5030B0.014Benzene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-C11/12/2411/12/240.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDToluene
mg/L 11/12/2411/12/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 11/12/2411/12/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/13/2411/13/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds CtF WO#: 24K0639
www.ChemtechFord.com
Page 3 of 10Page 3 of 10
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:
OBD-04
11/8/24 13:38 @ 2.0 °C
11/15/2024
West Winds
Sample ID: MW-4
Lab ID: 24K0639-03Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/7/24 10:40
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 11/12/2411/12/240.005 EPA 8260D/5030BNDBenzene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-C11/12/2411/12/240.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDToluene
mg/L 11/12/2411/12/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 11/12/2411/12/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/13/2411/13/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds CtF WO#: 24K0639
www.ChemtechFord.com
Page 4 of 10Page 4 of 10
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:
OBD-04
11/8/24 13:38 @ 2.0 °C
11/15/2024
West Winds
Sample ID: MW-5
Lab ID: 24K0639-04Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/7/24 11:05
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 11/12/2411/12/240.005 EPA 8260D/5030BNDBenzene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-C11/12/2411/12/240.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDToluene
mg/L 11/12/2411/12/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 11/12/2411/12/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/13/2411/13/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds CtF WO#: 24K0639
www.ChemtechFord.com
Page 5 of 10Page 5 of 10
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:
OBD-04
11/8/24 13:38 @ 2.0 °C
11/15/2024
West Winds
Sample ID: MW-NW
Lab ID: 24K0639-05Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/7/24 13:45
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 11/12/2411/12/240.005 EPA 8260D/5030BNDBenzene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-C11/12/2411/12/240.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDToluene
mg/L 11/12/2411/12/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 11/12/2411/12/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/13/2411/13/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds CtF WO#: 24K0639
www.ChemtechFord.com
Page 6 of 10Page 6 of 10
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:
OBD-04
11/8/24 13:38 @ 2.0 °C
11/15/2024
West Winds
Sample ID: MW-NE
Lab ID: 24K0639-06Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/7/24 15:40
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 11/12/2411/12/240.005 EPA 8260D/5030BNDBenzene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-C11/12/2411/12/240.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDToluene
mg/L 11/12/2411/12/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 11/12/2411/12/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/13/2411/13/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds CtF WO#: 24K0639
www.ChemtechFord.com
Page 7 of 10Page 7 of 10
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:
OBD-04
11/8/24 13:38 @ 2.0 °C
11/15/2024
West Winds
Sample ID: MW-SW
Lab ID: 24K0639-07Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 11/7/24 16:15
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 11/12/2411/12/240.005 EPA 8260D/5030B0.015Benzene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-C11/12/2411/12/240.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 11/12/2411/12/240.012 EPA 8260D/5030BNDToluene
mg/L 11/12/2411/12/240.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 11/12/2411/12/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 11/13/2411/13/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds CtF WO#: 24K0639
www.ChemtechFord.com
Page 8 of 10Page 8 of 10
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:
OBD-04
11/8/24 13:38 @ 2.0 °C
11/15/2024
West Winds
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
Project Name: West Winds CtF WO#: 24K0639
www.ChemtechFord.com
Page 9 of 10Page 9 of 10
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