DERR-2025-005115

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

GROUNDWATER MONITORING REPORT
May 2025

Work Plan OBD-04
Submitted: July 14, 2025

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 – May 2025
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 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 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 appears likely 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, but, is likely an up-gradient source given the prevailing groundwater
flow direction. The extent of hydrocarbon impacts in the subsurface remains undefined to the
north, east, and south-southeast of MW-7 (UEC, 2021; UEC, 2024).

3.0 METHODOLOGY

3.1 Groundwater Monitoring

On May 14, 2025, 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 14-15th 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),
Groundwater Monitoring Report – May 2025
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID #5000275, Release Site OBD

Underwood Environmental Consulting, Inc.
2
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/D, and 8015C.

4.0 RESULTS

4.1 Depth to Water and Flow Direction

On May 14, 2025, the depth to groundwater ranged from 5.81 to 8.63 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 two 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.

4.2 Groundwater Analytical Results

Nine monitoring wells were purged and sampled on May 14-15, 2025. The groundwater
analytical results presented on Table 1 are compared with Initial Screening Levels (ISLs) and
Tier 1 Levels (DERR, 2005).

Of the nine groundwater monitoring wells sampled, four wells met or exceeded the ISL for
benzene. The highest benzene concentration detected in groundwater was 0.450 mg/L at MW-
2. The ISL for TPH was exceeded at two monitoring well locations. The highest TPH
concentration detected was 3.2 mg/L TPH-DRO at MW-2 (Table 1).

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

The laboratory analytical reports for the May 2025 groundwater monitoring event are provided
as an attachment.

5.0 CONCLUSIONS

Based on field observations and the May 2025 groundwater analytical results, the following
conclusions are presented:

• Depth to groundwater ranged from approximately 5.8 to 8.6 feet below top of well
casing.

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

Groundwater Monitoring Report – May 2025
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID #5000275, Release Site OBD

Underwood Environmental Consulting, Inc.
3
• The ISL for benzene was met or exceeded at four well locations. The highest benzene
concentration detected in groundwater was 0.450 mg/L at MW-2.

• The ISL for TPH was exceeded at two well locations. The highest TPH concentration
detected in groundwater was 3.2 mg/L TPH-DRO at MW-2.

• Free product was observed at two monitoring well locations. The greatest free product
thickness observed was 3.27 feet at MW-7.

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

Submittal of this report concludes tasks approved under work plan OBD-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.

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 – May 14, 2025
Laboratory Analytical Reports

Groundwater Monitoring Report – May 2025
West Winds Truck Stop
1085 East Main St., Green River, UT
Facility ID #5000275, Release Site OBD

Underwood Environmental Consulting, Inc.
4

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, 2024 Groundwater Monitoring Report – November 2024, Work Plan OBD-04,
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 28, 2024.
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
May 14, 2025
7/13/25
2-Inch Monitoring Well
MW-1
4-Inch Monitoring Well
MW-NE
91.38 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
3.27
0.50
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
92.54 93.07
92.26 92.59
91.38
91.50 91.64
91.30
92.35
92.97
92.96
Groundwater Monitoring Report - May 2025
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
05/15/25 7.00 92.54 <0.002 <0.001 <0.002 <0.002 <0.008 <0.002 <0.025 <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
05/15/25 6.12 93.07 <0.003 <0.002 <0.005 <0.005 <0.015 <0.005 <0.050 <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
05/15/25 7.06 92.26 <0.003 0.016 <0.005 <0.005 <0.015 0.020 <0.050 <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 - May 2025
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
05/14/25 6.92 0.50 92.59
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
05/14/25 8.62 91.38 <0.002 0.025 <0.002 0.003 0.016 <0.002 0.0438 <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
05/14/25 7.99 91.50 <0.002 0.450 0.026 0.339 0.570 0.123 2.23 3.2
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
Not Sampled
Underwood Environmental Consulting, Inc.
Groundwater Monitoring Report - May 2025
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
05/14/25 7.63 91.64 <0.002 0.005 <0.002 0.002 <0.008 0.004 <0.025 <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
05/14/25 8.13 91.30 <0.002 <0.001 <0.002 <0.002 <0.008 <0.002 <0.025 <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 8.20 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
05/15/25 6.64 92.35 <0.002 <0.001 <0.002 <0.002 <0.008 <0.002 <0.025 <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 - May 2025
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
05/15/25 5.81 sheen 92.97 <0.002 <0.001 <0.002 <0.002 <0.008 0.007 0.0664 2.5
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
05/14/25 8.63 3.27 92.96
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
Not Sampled
Underwood Environmental Consulting, Inc.
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: 25E1292
Project: West Winds Truck Stop
5/23/2025
Approved By:
Reed Hendricks, Lab Director
9632 South 500 West Sandy, Utah 84070
Serving the Intermountain West since 1953
801.262.7299 Main 866.792.0093 Fax www.ChemtechFord.com
Page 1 of 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:
OBD-04
5/15/25 15:39 @ 0.8 °C
5/23/2025
West Winds Truck Stop
Sample ID: MW-1
Lab ID: 25E1292-01Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 5/14/25 15:55
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 5/15/255/15/250.001 EPA 8260D/5030B0.025Benzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030B0.003Ethylbenzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L J-LOW-C5/15/255/15/250.002 EPA 8260D/5030BNDNaphthalene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDToluene
mg/L 5/15/255/15/250.008 EPA 8260D/5030B0.016Xylenes, total
Gasoline Range
mg/L 5/15/255/15/250.0250 EPA 8260B/C /5030A/[CALC]0.0438Gasoline Range Organics
Diesel Range
mg/L 5/16/255/16/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds Truck Stop CtF WO#: 25E1292
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:
OBD-04
5/15/25 15:39 @ 0.8 °C
5/23/2025
West Winds Truck Stop
Sample ID: MW-2
Lab ID: 25E1292-02Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 5/14/25 16:10
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 5/15/255/15/250.020 EPA 8260D/5030B0.450Benzene
mg/L 5/15/255/15/250.050 EPA 8260D/5030B0.339Ethylbenzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L J-LOW-C5/15/255/15/250.002 EPA 8260D/5030B0.123Naphthalene
mg/L 5/15/255/15/250.002 EPA 8260D/5030B0.026Toluene
mg/L 5/15/255/15/250.150 EPA 8260D/5030B0.570Xylenes, total
Gasoline Range
mg/L 5/15/255/15/250.150 EPA 8260B/C /5030A/[CALC]2.23Gasoline Range Organics
Diesel Range
mg/L 5/16/255/16/251.0 EPA 8015 C3.2Diesel Range Organics
Project Name: West Winds Truck Stop CtF WO#: 25E1292
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:
OBD-04
5/15/25 15:39 @ 0.8 °C
5/23/2025
West Winds Truck Stop
Sample ID: MW-3
Lab ID: 25E1292-03Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 5/14/25 16:30
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 5/15/255/15/250.001 EPA 8260D/5030B0.005Benzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030B0.002Ethylbenzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L J-LOW-C5/15/255/15/250.002 EPA 8260D/5030B0.004Naphthalene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDToluene
mg/L 5/15/255/15/250.008 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 5/15/255/15/250.0250 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 5/16/255/16/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds Truck Stop CtF WO#: 25E1292
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:
OBD-04
5/15/25 15:39 @ 0.8 °C
5/23/2025
West Winds Truck Stop
Sample ID: MW-4
Lab ID: 25E1292-04Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 5/14/25 17:15
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 5/15/255/15/250.001 EPA 8260D/5030BNDBenzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDEthylbenzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L J-LOW-C5/15/255/15/250.002 EPA 8260D/5030BNDNaphthalene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDToluene
mg/L 5/15/255/15/250.008 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 5/15/255/15/250.0250 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 5/16/255/16/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds Truck Stop CtF WO#: 25E1292
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:
OBD-04
5/15/25 15:39 @ 0.8 °C
5/23/2025
West Winds Truck Stop
Sample ID: MW-5
Lab ID: 25E1292-05Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 5/15/25 9:10
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 5/15/255/15/250.001 EPA 8260D/5030BNDBenzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDEthylbenzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L J-LOW-C5/15/255/15/250.002 EPA 8260D/5030BNDNaphthalene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDToluene
mg/L 5/15/255/15/250.008 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 5/15/255/15/250.0250 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 5/16/255/16/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds Truck Stop CtF WO#: 25E1292
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:
OBD-04
5/15/25 15:39 @ 0.8 °C
5/23/2025
West Winds Truck Stop
Sample ID: MW-6
Lab ID: 25E1292-06Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 5/15/25 9:40
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 5/15/255/15/250.001 EPA 8260D/5030BNDBenzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDEthylbenzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L J-LOW-C5/15/255/15/250.002 EPA 8260D/5030B0.007Naphthalene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDToluene
mg/L 5/15/255/15/250.008 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 5/15/255/15/250.0250 EPA 8260B/C /5030A/[CALC]0.0664Gasoline Range Organics
Diesel Range
mg/L 5/16/255/16/251.0 EPA 8015 C2.5Diesel Range Organics
Project Name: West Winds Truck Stop CtF WO#: 25E1292
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:
OBD-04
5/15/25 15:39 @ 0.8 °C
5/23/2025
West Winds Truck Stop
Sample ID: MW-NW
Lab ID: 25E1292-07Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 5/15/25 10:10
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 5/15/255/15/250.001 EPA 8260D/5030BNDBenzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDEthylbenzene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L J-LOW-C5/15/255/15/250.002 EPA 8260D/5030BNDNaphthalene
mg/L 5/15/255/15/250.002 EPA 8260D/5030BNDToluene
mg/L 5/15/255/15/250.008 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 5/15/255/15/250.0250 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 5/16/255/16/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds Truck Stop CtF WO#: 25E1292
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:
OBD-04
5/15/25 15:39 @ 0.8 °C
5/23/2025
West Winds Truck Stop
Sample ID: MW-NE
Lab ID: 25E1292-08Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 5/15/25 10:50
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 5/21/255/21/250.002 EPA 8260D/5030BNDBenzene
mg/L 5/21/255/21/250.005 EPA 8260D/5030BNDEthylbenzene
mg/L 5/21/255/21/250.003 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 5/21/255/21/250.005 EPA 8260D/5030BNDNaphthalene
mg/L 5/21/255/21/250.005 EPA 8260D/5030BNDToluene
mg/L 5/21/255/21/250.015 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 5/21/255/21/250.0500 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 5/16/255/16/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds Truck Stop CtF WO#: 25E1292
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:
OBD-04
5/15/25 15:39 @ 0.8 °C
5/23/2025
West Winds Truck Stop
Sample ID: MW-SW
Lab ID: 25E1292-09Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 5/15/25 11:30
Preparation
Date/Time
Sampled By: James McReel
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 5/20/255/20/250.002 EPA 8260D/5030B0.016Benzene
mg/L 5/20/255/20/250.005 EPA 8260D/5030BNDEthylbenzene
mg/L 5/20/255/20/250.003 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 5/20/255/20/250.005 EPA 8260D/5030B0.020Naphthalene
mg/L 5/20/255/20/250.005 EPA 8260D/5030BNDToluene
mg/L 5/20/255/20/250.015 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 5/20/255/20/250.0500 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 5/16/255/16/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: West Winds Truck Stop CtF WO#: 25E1292
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:
OBD-04
5/15/25 15:39 @ 0.8 °C
5/23/2025
West Winds Truck Stop
Report Footnotes
Abbreviations
ND = Not detected at the corresponding Minimum Reporting Limit (MRL).
1 mg/L = one milligram per liter or 1 mg/kg = one milligram per kilogram = 1 part per million.
1 ug/L = one microgram per liter or 1 ug/kg = one microgram per kilogram = 1 part per billion.
1 ng/L = one nanogram per liter or 1 ng/kg = one nanogram per kilogram = 1 part per trillion.
On calculated parameters, there may be a slight difference between summing the rounded values shown on the report
vs the unrounded values used in the calculation.
Flag Descriptions
J-LOW-C = Estimated low due to low recovery of CCV
Project Name: West Winds Truck Stop CtF WO#: 25E1292
www.ChemtechFord.com Page 11 of 12Page 11 of 12
Page 12 of 12