DERR-2025-004163

718 E. Bridger Lane, Elk Ridge, Utah 84651, [phone] [e-mail]
Rockwell Solutions, Inc.
718 E Bridger Lane
Elk Ridge, UT 84651
[phone]
March 6, 2025

Brent Miller
LW Miller
1050 W 200 North
Logan, Utah

Re: Groundwater Monitoring Report, February 26, 2025
LW Miller Truck Stop (Facility ID: 0100611, LUST ID: MPA
1050 W 200 North
Logan, Utah

Dear Mr. Miller:

Rockwell Solutions collected groundwater samples at the above-referenced site on February 26,
2025. Groundwater measurements and samples were collected from monitoring wells MW-2,
MW-3, MW-4R, MW-5, MW-7, MW-10, MW-12, MW-14, MW-14R, MW-16R, MW-17, and
MW-18. The twelve wells were sampled using standard measuring, purging, and sampling
procedures.

Groundwater samples were collected from each monitoring well using a disposable bailer. Each
groundwater sample was immediately placed on ice and retained under chain-of-custody
documentation until relinquished to the laboratory. Samples were submitted for analysis of
MTBE, benzene, toluene, ethylbenzene, total xylenes, naphthalene (MBTEXN) and total
petroleum hydrocarbons (TPH) - gasoline range organics (GRO) using EPA Method 8260 and
TPH-diesel range organics (DRO) using EPA Method 8015. Chemtech-Ford conducted the
laboratory analyses. Laboratory reports are attached.

A summary of historical groundwater monitoring data including groundwater elevation and
laboratory analytical data is presented in Table 1 and a groundwater elevation map is presented
as Figure 1. Groundwater flow was to the south-southwest on February 26, 2025.

In general, hydrocarbon concentrations have decreased since the last sampling event. The only
well that contains a concentration that exceeds a Tier 1 cleanup level is MW-3. Dissolved
hydrocarbons appear to be naturally attenuating.

The next groundwater monitoring event will take place in approximately nine months.

If you need additional information or have any questions, please contact me at [phone].

Groundwater Monitoring Report, February 26, 2025, LW Miller, Facility ID #0100611

718 E. Bridger Lane, Elk Ridge, Utah 84651, [phone] [e-mail]
Thank you,

David S. Hansen
Certified UST Consultant CC0130
Rockwell Solutions, Inc.

cc: Eileen Brennan

MW-15
Figure 1
Approx. scale in feet
00 90
C StoreTank
Basin
Canopy
Motel
Motel
Remediation
Compound
Motel
USTs
C-Store
Canopy
LW Miller Truck Stop
1050 W 200 North
Logan, Utah
Groundwater Elevations
February 26, 2025
NORTH
Monitoring Well
Destroyed Monitoring Well
(90.18)= Groundwater Elevation (ft)
= Groundwater Elevation Contour (ft)
MW-10
(94.62)
MW-8
MW-11
MW-7
*(95.57)
MW-5
(94.64)
MW-2
(*96.50)
MW-12
(*96.64)
MW-14R
(93.29)
MW-18
*(93.11)
MW-17
(93.18)
MW-3
(94.44)
MW-14
(93.48)
(*90.18)= Anomalous Reading not used in contouring
MW-4R
(94.40)
94.-
0-
MW-13
93 75--.
9 .--3 25
MW-16
(93.85)
-94.25-
94-.50-
MW-6
-93.50-
Sample Date
TOC
(ft)
DTW
(ft)
Groundwater
Elevation (ft)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Xylenes
(mg/L)
Naph-
thalene
(mg/L)
MTBE
(mg/L)
TPH-
GRO
(mg/L)
TPH-DRO
(mg/L)
0.005 1 0.7 10 0.7 0.2 1 1
0.3 3 4 10 0.7 0.2 10 10
MW-2 5/28/2011 100.50 4.30 96.20 1.2 0.21 0.15 0.4 0.012 <0.0005 5.10 2.3
MW-2 11/12/2011 100.50 5.17 95.33 0.23 0.007 0.006 0.005 <0.001 <0.0005 0.73 0.16
MW-2 5/28/2012 100.50 5.98 94.52 0.35 0.015 0.01 0.016 <0.001 <0.0005 1.10 0.11
MW-2 10/27/2012 100.50 6.30 94.20 0.3 0.007 0.006 0.006 <0.001 <0.0005 0.91 0.33
MW-2 5/27/2013 100.50 6.12 94.38 0.62 0.019 0.015 0.022 <0.001 <0.0005 2.00 0.31
MW-2 10/11/2014 100.50 5.99 94.51 1.000 0.013 0.042 0.028 <0.01 <0.005 2.50 <0.26
MW-2 3/29/2022 100.50 4.64 95.86 0.544 <0.012 0.058 0.042 <0.012 <0.005 0.95 <1
MW-2 7/18/2022 100.50 6.06 94.44 0.141 <0.012 0.038 <0.012 <0.012 <0.005 0.179 2.7
MW-2 2/9/2023 100.50 5.66 94.84 0.374 <0.012 <0.012 0.013 <0.012 <0.005 0.584 <1
MW-2 7/15/2023 100.50 5.26 95.24 0.24 <0.012 0.031 <0.012 <0.012 <0.005 0.289 1.2
MW-2 1/27/2024 100.50 5.65 94.85 0.45 <0.012 0.048 0.058 <0.012 <0.005 0.685 2.1
MW-2 5/27/2024 100.50 5.65 94.85 0.257 <0.012 0.013 <0.012 <0.012 <0.005 0.270 <1
MW-2 2/26/2025 100.50 4.00 96.50 0.154 <0.012 0.014 <0.038 <0.012 <0.008 0.168 <1
Initial Screening Levels
RBCA Tier 1 Screening Levels
Table 1
Groundwater Analytical Results
LW Miller Truck Stop (Facility ID 0100611, Release ID MPA)
1050 W 200 North, Logan, Utah
Page 1 of 9
Sample Date
TOC
(ft)
DTW
(ft)
Groundwater
Elevation (ft)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Xylenes
(mg/L)
Naph-
thalene
(mg/L)
MTBE
(mg/L)
TPH-
GRO
(mg/L)
TPH-DRO
(mg/L)
0.005 1 0.7 10 0.7 0.2 1 1
0.3 3 4 10 0.7 0.2 10 10
Initial Screening Levels
RBCA Tier 1 Screening Levels
Table 1
Groundwater Analytical Results
LW Miller Truck Stop (Facility ID 0100611, Release ID MPA)
1050 W 200 North, Logan, Utah
MW-3 5/28/2011 100.06 3.99 96.07 6.4 9 0.5 3.9 0.1 <0.01 48.0 4.3
MW-3 11/12/2011 100.06 5.86 94.20 4.9 4.9 0.28 2.1 0.033 <0.003 31.0 2.2
MW-3 5/28/2012 100.06 5.08 94.98 5.6 4.6 0.38 2.5 0.035 <0.005 32.0 1.9
MW-3 10/27/2012 100.06 6.00 94.06 6.9 0.87 0.54 3.4 0.044 <0.003 28.0 5.2
MW-3 5/27/2013 100.06 5.43 94.63 4.30 0.72 0.3 1.50 0.028 <0.003 17.0 2.9
MW-3 10/11/2014 100.06 5.39 94.67 7.00 0.14 0.61 3.00 0.043 <0.005 24.0 0.9
MW-3 3/29/2022 100.06 5.78 94.28 2.08 0.016 0.09 0.516 0.055 <0.005 3.88 2.2
MW-3 7/18/2022 100.06 5.88 94.18 3.09 0.017 0.016 0.676 0.077 <0.005 4.82 2.9
MW-3 2/9/2023 100.06 5.33 94.73 1.93 0.058 0.202 0.745 0.027 <0.005 4.80 2.2
MW-3 7/15/2023 100.06 5.34 94.72 2.35 0.023 0.027 0.5 0.03 <0.005 3.74 2.6
MW-3 1/27/2024 100.06 5.70 94.36 1.7 0.014 0.248 0.642 0.038 <0.005 3.71 2.2
MW-3 5/27/2024 100.06 3.61 96.45 1.91 0.015 0.329 0.812 0.067 <0.005 4.02 1.9
MW-3 2/26/2025 100.06 5.62 94.44 1.44 0.049 0.084 0.365 0.057 <0.008 2.58 1.9
MW-4 5/28/2011 100.35 4.70 95.65 2 0.06 0.096 0.33 0.011 <0.001 6.10 0.62
MW-4 11/12/2011 100.35 6.44 93.91 1.4 0.036 0.061 0.12 0.002 <0.0005 4.20 0.82
MW-4 5/28/2012 100.35 6.00 94.35 0.95 0.044 0.075 0.17 0.003 <0.0005 3.10 0.14
MW-4 10/27/2012 100.35 6.61 93.74 2.2 0.019 0.12 0.042 0.002 <0.001 5.60 0.55
MW-4 5/27/2013 100.35 5.89 94.46 1 0.079 0.094 0.16 0.005 <0.001 4.10 0.66
MW-4 10/11/2014 100.35 5.94 94.41 1.3 <0.01 0.14 0.011 <0.02 <0.01 3.50 0.11
Page 2 of 9
Sample Date
TOC
(ft)
DTW
(ft)
Groundwater
Elevation (ft)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Xylenes
(mg/L)
Naph-
thalene
(mg/L)
MTBE
(mg/L)
TPH-
GRO
(mg/L)
TPH-DRO
(mg/L)
0.005 1 0.7 10 0.7 0.2 1 1
0.3 3 4 10 0.7 0.2 10 10
Initial Screening Levels
RBCA Tier 1 Screening Levels
Table 1
Groundwater Analytical Results
LW Miller Truck Stop (Facility ID 0100611, Release ID MPA)
1050 W 200 North, Logan, Utah
MW-4R 7/18/2022 100.23 6.33 93.90 0.26 <0.012 0.023 <0.012 <0.012 <0.005 0.283 1.4
MW-4R 2/9/2023 100.23 6.06 94.17 0.688 <0.012 0.123 <0.012 0.015 <0.005 2.24 1.6
MW-4R 7/15/2023 100.23 5.92 94.31 0.828 <0.012 0.181 <0.012 0.022 <0.005 1.79 1.7
MW-4R 1/27/2024 100.23 4.99 95.24 0.785 <0.012 0.156 <0.012 0.025 <0.005 1.87 1.4
MW-4R 5/27/2024 100.23 5.18 95.05 0.506 <0.012 0.066 <0.012 <0.012 <0.005 0.94 1.1
MW-4R 2/26/2025 100.23 5.83 94.40 0.164 <0.012 <0.012 <0.038 <0.012 <0.008 0.472 <1
MW-5 5/28/2011 99.29 3.05 96.24 0.5 0.033 0.044 0.04 0.008 <0.001 1.50 0.86
MW-5 11/12/2011 99.29 5.07 94.22 0.12 0.002 0.006 0.006 <0.001 <0.0005 0.35 0.72
MW-5 5/28/2012 99.29 4.61 94.68 0.44 0.04 0.051 0.063 0.001 <0.0005 1.60 0.13
MW-5 10/27/2012 99.29 4.97 94.32 0.19 0.006 0.011 0.007 <0.001 <0.0005 0.65 0.67
MW-5 5/27/2013 99.29 4.72 94.57 0.28 0.023 0.01 0.016 <0.001 <0.0005 1.20 0.89
MW-5 10/11/2014 99.29 4.71 94.58 0.27 0.005 0.017 0.003 <0.005 <0.003 0.92 0.083
MW-5 7/18/2022 99.29 4.97 94.32 0.112 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-5 2/9/2023 99.29 4.65 94.64 0.066 <0.012 0.017 <0.012 <0.012 <0.005 0.582 <1
MW-5 7/15/2023 99.29 4.63 94.66 0.06 <0.012 0.026 <0.012 <0.012 <0.005 <0.125 1.2
MW-5 1/27/2024 99.29 4.43 94.86 0.058 <0.012 0.047 0.013 <0.012 <0.005 <0.125 <1
MW-5 5/27/2024 99.29 99.29 0.044 <0.012 0.021 <0.012 <0.012 <0.005 <0.125 <1
MW-5 2/26/2025 99.29 4.65 94.64 0.037 <0.012 0.012 <0.038 <0.012 <0.008 <0.125 <1
Monitoring well MW-4 replaced in July 2022
Page 3 of 9
Sample Date
TOC
(ft)
DTW
(ft)
Groundwater
Elevation (ft)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Xylenes
(mg/L)
Naph-
thalene
(mg/L)
MTBE
(mg/L)
TPH-
GRO
(mg/L)
TPH-DRO
(mg/L)
0.005 1 0.7 10 0.7 0.2 1 1
0.3 3 4 10 0.7 0.2 10 10
Initial Screening Levels
RBCA Tier 1 Screening Levels
Table 1
Groundwater Analytical Results
LW Miller Truck Stop (Facility ID 0100611, Release ID MPA)
1050 W 200 North, Logan, Utah
MW-6 5/28/2011 99.57 3.48 96.09 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 <0.022 <0.32
MW-6 11/12/2011 99.57 5.46 94.11 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 <0.022 0.2
MW-6 5/28/2012 99.57 4.88 94.69 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 <0.022 <0.048
MW-6 10/27/2012 99.57 5.32 94.25 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 <0.022 0.032
MW-6 5/27/2013 99.57 4.90 94.67 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 0.02 NA
MW-6 10/11/2014 99.57 4.99 94.58 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.022 <0.042
MW-6 3/29/2022 99.57 5.20 94.37 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1.0
MW-6 7/18/2022 99.57 5.42 94.15 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-6 2/9/2023 99.57 5.26 94.31 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-7 5/28/2011 99.84 3.13 96.71 0.62 0.007 0.035 0.025 0.052 0.001 3.30 2.8
MW-7 11/12/2011 99.84 4.83 95.01 0.4 0.004 0.031 0.014 0.035 0.001 3.30 4.9
MW-7 5/28/2012 99.84 4.11 95.73 0.34 0.003 0.017 0.009 0.017 0.0009 2.70 1.6
MW-7 10/27/2012 99.84 4.64 95.20 0.26 0.002 0.011 0.006 0.019 0.0008 2.10 3
MW-7 5/27/2013 99.84 4.15 95.69 0.26 0.002 0.01 0.005 0.011 0.0008 2.10 3.9
MW-7 10/11/2014 99.84 4.35 95.49 0.047 0.0008 0.003 0.002 0.002 0.0006 0.940 0.89
MW-7 7/18/2022 99.84 4.76 95.08 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 2.4
MW-7 2/9/2023 99.84 4.60 95.24 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 1.5
MW-7 7/15/2023 99.84 4.28 95.56 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 3.4
MW-7 1/27/2024 99.84 4.24 95.60 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 3.0
MW-7 5/27/2024 99.84 4.53 95.31 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 1.7
MW-7 2/26/2025 99.84 4.27 95.57 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1
Page 4 of 9
Sample Date
TOC
(ft)
DTW
(ft)
Groundwater
Elevation (ft)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Xylenes
(mg/L)
Naph-
thalene
(mg/L)
MTBE
(mg/L)
TPH-
GRO
(mg/L)
TPH-DRO
(mg/L)
0.005 1 0.7 10 0.7 0.2 1 1
0.3 3 4 10 0.7 0.2 10 10
Initial Screening Levels
RBCA Tier 1 Screening Levels
Table 1
Groundwater Analytical Results
LW Miller Truck Stop (Facility ID 0100611, Release ID MPA)
1050 W 200 North, Logan, Utah
MW-8 5/28/2011 98.25 2.02 96.23 0.17 0.001 0.014 0.01 0.008 <0.0005 1.300 1.9
MW-8 11/12/2011 98.25 4.05 94.20 0.094 0.001 0.003 0.005 0.002 <0.0005 0.500 0.37
MW-8 5/28/2012 98.25 2.76 95.49 0.11 0.001 0.018 0.004 0.003 <0.0005 0.900 0.21
MW-8 10/27/2012 98.25 3.71 94.54 0.039 <0.0007 <0.0008 0.002 0.001 <0.0005 0.320 0.57
MW-8 5/27/2013 98.25 3.21 95.04 0.051 <0.0007 0.012 0.002 0.003 <0.0005 0.620 0.92
MW-8 10/11/2014 98.25 3.21 95.04 0.011 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 0.220 0.098
MW-8 7/18/2022 98.25 3.78 94.47 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-8 2/9/2023 98.25 3.47 94.78 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-10 11/12/2011 96.79 3.02 93.77 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 0.028 0.66
MW-10 5/28/2012 96.79 2.80 93.99 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 0.028 0.034
MW-10 10/27/2012 96.79 2.70 94.09 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 <0.022 0.27
MW-10 5/27/2013 96.79 2.80 93.99 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 <0.022 0.064
MW-10 10/11/2014 96.79 2.53 94.26 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.022 <0.043
MW-10 7/6/2022 96.79 2.60 94.19 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-10 7/15/2023 96.79 2.25 94.54 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 1.7
MW-10 1/27/2024 96.79 NM NM
MW-10 5/27/2024 96.79 2.55 94.24 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 1.1
MW-10 2/26/2025 96.79 2.17 94.62 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1
Well was buried below snow pile
Page 5 of 9
Sample Date
TOC
(ft)
DTW
(ft)
Groundwater
Elevation (ft)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Xylenes
(mg/L)
Naph-
thalene
(mg/L)
MTBE
(mg/L)
TPH-
GRO
(mg/L)
TPH-DRO
(mg/L)
0.005 1 0.7 10 0.7 0.2 1 1
0.3 3 4 10 0.7 0.2 10 10
Initial Screening Levels
RBCA Tier 1 Screening Levels
Table 1
Groundwater Analytical Results
LW Miller Truck Stop (Facility ID 0100611, Release ID MPA)
1050 W 200 North, Logan, Utah
MW-11 11/12/2011 98.25 4.52 93.73 0.14 0.002 <0.0008 0.003 <0.001 0.003 1.50 0.61
MW-11 5/28/2012 98.25 3.79 94.46 0.073 0.001 <0.0008 0.002 <0.001 0.003 1.20 0.3
MW-11 10/27/2012 98.25 4.31 93.94 0.016 0.0009 <0.0008 0.002 <0.001 0.002 1.00 2.3
MW-11 5/27/2013 98.25 4.02 94.23 0.005 <0.0007 <0.0008 0.001 <0.001 0.002 1.10 0.7
MW-11 10/11/2014 98.25 4.19 94.06 0.0005 <0.0005 <0.0005 <0.0005 <0.001 0.001 0.450 0.13
MW-11 7/6/2022 98.25 4.27 93.98 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-11 2/9/2023 98.25 3.55 94.70 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-12 11/12/2011 98.54 4.97 93.57 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 <0.022 0.39
MW-12 5/28/2012 98.54 4.75 93.79 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 <0.022 0.037
MW-12 10/27/2012 98.54 5.04 93.50 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 0.05 4.2
MW-12 5/27/2013 98.54 4.85 93.69 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 <0.022 0.65
MW-12 10/11/2014 98.54 4.18 94.36 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.022 <0.043
MW-12 7/6/2022 98.54 5.38 93.16 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 2.5
MW-12 2/9/2023 98.54 3.98 94.56 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-12 7/15/2023 98.54 3.84 94.70 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 5.3
MW-12 1/27/2024 98.54 3.11 95.43 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-12 5/27/2024 98.54 2.55 95.99 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-12 2/26/2025 98.54 1.90 96.64 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1
Page 6 of 9
Sample Date
TOC
(ft)
DTW
(ft)
Groundwater
Elevation (ft)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Xylenes
(mg/L)
Naph-
thalene
(mg/L)
MTBE
(mg/L)
TPH-
GRO
(mg/L)
TPH-DRO
(mg/L)
0.005 1 0.7 10 0.7 0.2 1 1
0.3 3 4 10 0.7 0.2 10 10
Initial Screening Levels
RBCA Tier 1 Screening Levels
Table 1
Groundwater Analytical Results
LW Miller Truck Stop (Facility ID 0100611, Release ID MPA)
1050 W 200 North, Logan, Utah
MW-13 11/12/2011 100.43 6.12 94.31 0.17 0.003 0.019 0.022 <0.001 <0.0005 0.57 0.96
MW-13 5/28/2012 100.43 6.88 93.55 0.38 0.0009 0.023 0.005 <0.001 <0.0005 1.00 0.061
MW-13 10/27/2012 100.43 7.58 92.85 0.56 <0.0007 0.041 0.001 <0.001 <0.0005 1.60 0.17
MW-13 5/27/2013 100.43 6.77 93.66 0.072 <0.0007 0.0008 <0.0008 <0.001 <0.0005 0.18 0.057
MW-13 10/11/2014 100.43 6.96 93.47 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.022 <0.043
MW-13 7/6/2022 100.43 6.98 93.45 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-13 2/9/2023 100.43 6.65 93.78 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-14 11/12/2011 98.70 5.41 93.29 9.3 12 1.1 7.2 0.067 <0.005 82.0 3
MW-14 5/28/2012 98.70 5.21 93.49 10 11 1.3 8.2 0.071 <0.01 73.0 3.2
MW-14 10/27/2012 98.70 5.56 93.14 7.6 4.3 1.3 7.5 0.083 <0.003 57.0 4.9
MW-14 5/27/2013 98.70 5.14 93.56 5.7 0.28 1.4 8.4 0.11 0.001 48.0 5.3
MW-14 10/11/2014 98.70 5.48 93.22 3.9 0.079 1.1 4.1 0.09 <0.003 26.0 2.7
MW-14 2/9/2023 98.70 5.40 93.30 0.098 <0.012 <0.012 <0.012 <0.012 <0.005 0.64 2
MW-14 7/15/2023 98.70 5.20 93.50 0.131 <0.012 <0.012 <0.012 0.017 <0.005 0.706 3.2
MW-14 1/27/2024 98.70 5.20 93.50 0.124 <0.012 <0.012 0.017 <0.012 <0.005 0.708 2.4
MW-14 5/27/2024 98.70 5.18 93.52 0.125 <0.012 <0.012 <0.012 <0.012 <0.005 0.411 2.0
MW-14 2/26/2025 98.70 5.22 93.48 0.050 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 1.6
MW-14R 7/18/2022 98.37 5.05 93.32 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-14R 7/15/2023 98.37 4.25 94.12 0.021 <0.012 <0.012 <0.012 <0.012 0.005 <0.125 2.5
MW-14R 1/27/2024 98.37 4.25 94.12 0.01 <0.012 <0.012 <0.012 <0.012 0.005 <0.125 1.6
MW-14R 5/27/2024 98.37 4.59 93.78 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 1.6
MW-14R 2/26/2025 98.37 5.08 93.29 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 1.2
Page 7 of 9
Sample Date
TOC
(ft)
DTW
(ft)
Groundwater
Elevation (ft)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Xylenes
(mg/L)
Naph-
thalene
(mg/L)
MTBE
(mg/L)
TPH-
GRO
(mg/L)
TPH-DRO
(mg/L)
0.005 1 0.7 10 0.7 0.2 1 1
0.3 3 4 10 0.7 0.2 10 10
Initial Screening Levels
RBCA Tier 1 Screening Levels
Table 1
Groundwater Analytical Results
LW Miller Truck Stop (Facility ID 0100611, Release ID MPA)
1050 W 200 North, Logan, Utah
MW-15 11/12/2011 96.68 0.41 96.27 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 0.02 2.4
MW-15 5/28/2012 96.68 0.68 96.00 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 <0.022 0.42
MW-15 10/27/2012 96.68 0.98 95.70 <0.0005 <0.0007 <0.0008 <0.0008 <0.001 <0.0005 <0.022 1.7
MW-15 5/27/2013 96.68 2.28 94.40 <0.0005 <0.0007 <0.0008 0.001 <0.001 <0.0005 <0.022 1.4
MW-15 10/11/2014 96.68 2.32 94.36 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.022 0.066
MW-16 11/12/2011 99.20 5.11 94.09 0.002 <0.0007 0.001 <0.0008 <0.001 <0.0005 0.05 0.2
MW-16 5/28/2012 99.20 4.78 94.42 0.008 <0.0007 0.001 <0.0008 <0.001 <0.0005 0.14 0.27
MW-16 10/27/2012 99.20 4.92 94.28 0.005 <0.0007 0.001 <0.0008 <0.001 <0.0005 0.07 0.19
MW-16 5/27/2013 99.20 4.75 94.45 0.008 <0.0007 0.001 <0.0008 <0.001 <0.0005 0.09 0.52
MW-16 10/11/2014 99.20 4.79 94.41 0.001 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 0.032 0.37
MW-16R 6/7/2024 99.05 4.75 94.30 <0.0005 <0.012 <0.012 <0.038 <0.012 <0.0008 <0.125 1.2
MW-16R 2/26/2025 99.05 5.20 93.85 <0.005 <0.012 <0.012 <0.038 <0.012 <0.0008 <0.125 1.8
MW-17 7/18/2022 96.91 4.36 92.55 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-17 2/9/2023 96.91 3.80 93.11 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-17 7/15/2023 96.91 5.61 91.30 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-17 1/27/2024 96.91 4.21 92.70 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-17 5/27/2024 96.91 5.09 91.82 <0.005 <0.012 <0.012 <0.012 0.019 <0.005 <0.125 <1
MW-17 2/26/2025 96.91 3.73 93.18 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1
Monitoring well MW-16 replaced in April 2024
Page 8 of 9
Sample Date
TOC
(ft)
DTW
(ft)
Groundwater
Elevation (ft)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Xylenes
(mg/L)
Naph-
thalene
(mg/L)
MTBE
(mg/L)
TPH-
GRO
(mg/L)
TPH-DRO
(mg/L)
0.005 1 0.7 10 0.7 0.2 1 1
0.3 3 4 10 0.7 0.2 10 10
Initial Screening Levels
RBCA Tier 1 Screening Levels
Table 1
Groundwater Analytical Results
LW Miller Truck Stop (Facility ID 0100611, Release ID MPA)
1050 W 200 North, Logan, Utah
MW-18 7/18/2022 97.61 6.73 90.88 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 16.2
MW-18 2/9/2023 97.61 4.20 93.41 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-18 7/15/2023 97.61 3.96 93.65 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 1.0
MW-18 1/27/2024 97.61 2.90 94.71 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 2.0
MW-18 5/27/2024 97.61 3.93 93.68 <0.005 <0.012 <0.012 <0.012 <0.012 <0.005 <0.125 <1
MW-18 2/26/2025 97.61 4.50 93.11 <0.005 <0.012 <0.012 <0.038 <0.012 <0.008 <0.125 <1
TPH-GRO = total petroleum hydrocarbons - gasoline range organics
TPH-DRO = total petroleum hydrocarbons - diesel range organics
mg/L = milligrams per liter, which approximates parts per million.
NM = Not Measured
Pink-shaded cells = exceeds Initial Screening Level
Yellow-shaded cells = exceeds Tier 1 Level
Page 9 of 9
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
Rockwell Solutions, Inc
Attn: Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
Work Order: 25B2063
Project: LW Miller
3/6/2025
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 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
Sample ID: MW-2
Lab ID: 25B2063-01Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/26/25 16:30
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 2/28/252/28/250.005 EPA 8260D/5030B0.154Benzene
mg/L 2/28/252/28/250.012 EPA 8260D/5030B0.014Ethylbenzene
mg/L 2/28/252/28/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDNaphthalene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDToluene
mg/L 2/28/252/28/250.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 2/28/252/28/250.125 EPA 8260B/C /5030A/[CALC]0.168Gasoline Range Organics
Diesel Range
mg/L 2/28/252/27/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
Page 2 of 15Page 2 of 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
Sample ID: MW-3
Lab ID: 25B2063-02Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/26/25 17:00
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 2/28/252/28/250.050 EPA 8260D/5030B1.44Benzene
mg/L 2/28/252/28/250.012 EPA 8260D/5030B0.084Ethylbenzene
mg/L 2/28/252/28/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 2/28/252/28/250.012 EPA 8260D/5030B0.057Naphthalene
mg/L 2/28/252/28/250.012 EPA 8260D/5030B0.049Toluene
mg/L 2/28/252/28/250.038 EPA 8260D/5030B0.365Xylenes, total
Gasoline Range
mg/L 2/28/252/28/250.125 EPA 8260B/C /5030A/[CALC]2.58Gasoline Range Organics
Diesel Range
mg/L 2/28/252/27/251.0 EPA 8015 C1.9Diesel Range Organics
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
Page 3 of 15Page 3 of 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
Sample ID: MW-4R
Lab ID: 25B2063-03Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/26/25 17:30
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 2/28/252/28/250.005 EPA 8260D/5030B0.164Benzene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDEthylbenzene
mg/L 2/28/252/28/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDNaphthalene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDToluene
mg/L 2/28/252/28/250.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 2/28/252/28/250.125 EPA 8260B/C /5030A/[CALC]0.472Gasoline Range Organics
Diesel Range
mg/L 2/28/252/27/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
Page 4 of 15Page 4 of 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
Sample ID: MW-5
Lab ID: 25B2063-04Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/26/25 13:45
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 2/28/252/28/250.005 EPA 8260D/5030B0.037Benzene
mg/L 2/28/252/28/250.012 EPA 8260D/5030B0.012Ethylbenzene
mg/L 2/28/252/28/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDNaphthalene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDToluene
mg/L 2/28/252/28/250.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 2/28/252/28/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 2/28/252/27/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
Page 5 of 15Page 5 of 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
Sample ID: MW-7
Lab ID: 25B2063-05Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/26/25 14:45
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/3/253/3/250.005 EPA 8260D/5030BNDBenzene
mg/L 3/3/253/3/250.012 EPA 8260D/5030BNDEthylbenzene
mg/L J-LOW-L3/3/253/3/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 3/3/253/3/250.012 EPA 8260D/5030BNDNaphthalene
mg/L 3/3/253/3/250.012 EPA 8260D/5030BNDToluene
mg/L 3/3/253/3/250.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 3/3/253/3/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 2/28/252/27/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
Page 6 of 15Page 6 of 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
Sample ID: MW-10
Lab ID: 25B2063-06Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/26/25 14:15
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 2/28/252/28/250.005 EPA 8260D/5030BNDBenzene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDEthylbenzene
mg/L 2/28/252/28/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDNaphthalene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDToluene
mg/L 2/28/252/28/250.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 2/28/252/28/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 2/28/252/27/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
Page 7 of 15Page 7 of 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
Sample ID: MW-12
Lab ID: 25B2063-07Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/26/25 13:15
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 2/28/252/28/250.005 EPA 8260D/5030BNDBenzene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDEthylbenzene
mg/L 2/28/252/28/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDNaphthalene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDToluene
mg/L 2/28/252/28/250.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 2/28/252/28/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 2/28/252/27/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
Page 8 of 15Page 8 of 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
Sample ID: MW-14
Lab ID: 25B2063-08Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/26/25 16:00
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 2/28/252/28/250.005 EPA 8260D/5030B0.050Benzene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDEthylbenzene
mg/L 2/28/252/28/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDNaphthalene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDToluene
mg/L 2/28/252/28/250.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 2/28/252/28/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 2/28/252/27/251.0 EPA 8015 C1.6Diesel Range Organics
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
Page 9 of 15Page 9 of 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
Sample ID: MW-14R
Lab ID: 25B2063-09Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/26/25 15:45
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 2/28/252/28/250.005 EPA 8260D/5030BNDBenzene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDEthylbenzene
mg/L 2/28/252/28/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDNaphthalene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDToluene
mg/L 2/28/252/28/250.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 2/28/252/28/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 2/28/252/27/251.0 EPA 8015 C1.2Diesel Range Organics
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
Page 10 of 15Page 10 of 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
Sample ID: MW-16R
Lab ID: 25B2063-10Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/26/25 15:15
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 2/28/252/28/250.005 EPA 8260D/5030BNDBenzene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDEthylbenzene
mg/L 2/28/252/28/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDNaphthalene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDToluene
mg/L 2/28/252/28/250.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 2/28/252/28/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 2/28/252/27/251.0 EPA 8015 C1.8Diesel Range Organics
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
Page 11 of 15Page 11 of 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
Sample ID: MW-17
Lab ID: 25B2063-11Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/26/25 12:15
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 2/28/252/28/250.005 EPA 8260D/5030BNDBenzene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDEthylbenzene
mg/L 2/28/252/28/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDNaphthalene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDToluene
mg/L 2/28/252/28/250.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 2/28/252/28/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 2/28/252/27/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
Page 12 of 15Page 12 of 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
Sample ID: MW-18
Lab ID: 25B2063-12Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 2/26/25 12:45
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 2/28/252/28/250.005 EPA 8260D/5030BNDBenzene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDEthylbenzene
mg/L 2/28/252/28/250.008 EPA 8260D/5030BNDMethyl-tert-butyl ether (MTBE)
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDNaphthalene
mg/L 2/28/252/28/250.012 EPA 8260D/5030BNDToluene
mg/L 2/28/252/28/250.038 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 2/28/252/28/250.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 2/28/252/27/251.0 EPA 8015 CNDDiesel Range Organics
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
Page 13 of 15Page 13 of 16
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
2/27/25 16:38 @ 3.4 °C
3/6/2025
LW Miller
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-L = Estimated low due to low recovery of LCS
Project Name: LW Miller CtF WO#: 25B2063
www.ChemtechFord.com
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