DERR-2024-012269

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Arcadis U.S., Inc.
2100 Georgetown Drive
Suite 402
Sewickley, Pennsylvania 15143
United States
Phone: [phone]
www.arcadis.com

Ms. Liberty Coe
Utah Department of Environmental Quality
Division of Environmental Response and Remediation
195 North 1950 West Salt Lake City, UT 84116

Date: November 4, 2024
Our Ref: 30063823
Subject: Second Half 2024 Groundwater Monitoring Report

Dear Ms. Coe:
On behalf of Chevron Environmental Management Company (CEMC), Arcadis U.S., Inc. (Arcadis) has prepared
the attached Second Half 2024 Groundwater Monitoring Report for the following facility.

Former Chevron
Station No.
Case No. Location
7-1887 Facility ID No. 1200035; Release Site FME 2003 Washington Blvd., Ogden, UT

If you have any questions, please do not hesitate to contact me.

Sincerely,
Arcadis U.S., Inc.

Gerald Robinson
Project Manager
Copies:
Brian Everill (electronic copy to [e-mail])
Andrew Lifferth (electronic copy to [e-mail])
Ben Hong (hard copy to 1605 E. Beechwood Drive Layton, UT 84040)
John Amato, CEMC

SECOND HALF 2024 GROUNDWATER MONITORING REPORT
November 4, 2024

Facility No: Former Chevron Station No.
7-1887
Address: 2003 Washington Blvd., Ogden, Utah

Arcadis Contact Person / Phone No.: Gerald Robinson / 724 934 9507
Arcadis Project No.: 30063823
Primary Agency/Regulatory ID No.:
Utah Department of Environmental Quality (UDEQ)
Division of Environmental Response and Remediation
(DERR)
Liberty Coe / Facility ID No. 1200035; Release Site FME

WORK CONDUCTED THIS PERIOD [Second Half 2024]:

1. Conducted semi-annual groundwater monitoring activities on September 3 and 4, 2024 per DERR
correspondence on November 9, 2023.
2. Prepared the Second Half 2024 Groundwater Monitoring Report.

WORK PROPOSED NEXT PERIOD [First Half 2025]:

1. To be determined.

Current Phase of Project: Post Remedy Groundwater Monitoring
Frequency of Monitoring / Sampling: Semi-annual on an as-need basis
Are Light Non-Aqueous Phase Liquid
(LNAPL) Present On-site: No
Cumulative LNAPL Recovered to Date: None (gallons)
Approximate Depth to Groundwater: 10.36 to 12.48 (feet below
top of casing)
Approximate Groundwater Elevation: 87.11 to 87.79
(feet relative to
corresponding
datum)
Groundwater Flow Direction West Southwest
November 4, 2024

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Groundwater Gradient 0.003 (feet per foot)
Current Remediation Techniques: Permeable Filled Borings (PFBs)
Permits for Discharge: None
Summary of Unusual Activity: None
Agency Directive Requirements:
On November 9, 2023, a directive for Additional Sampling
Requirements was issued by DERR requesting 2 additional
sampling events and reports with reports due 6 months and
12 months, respectively, from the date of the directive. On
February 27, 2024, DERR approved an extension for the first
report due on June 28, 2024.

DISCUSSION
Application of gypsum PFBs were conducted from June 17 to June 27, 2021. Baseline groundwater
monitoring was conducted in December 2019 and five post-remediation groundwater monitoring events
were conducted between September 2021 and August 2022. A Corrective Action Completion Report and
Closure Request was submitted to DERR on April 4, 2023 (Arcadis 2023).
On April 14, 2023, a directive for Additional Sampling Requirements was issued by DERR to Chevron
Environmental Management Company (CEMC) requesting two additional sampling events and
corresponding reports. The first additional sampling event was completed in May 2023 and the
corresponding report was submitted to DERR in July 2023. The second additional sampling event was
completed in August 2023 and the corresponding report was submitted in October 2023.
On November 9, 2023, a directive for Additional Sampling Requirements was issued by DERR to CEMC
requesting two additional sampling events and corresponding reports (Attachment A). The second
additional sampling was completed in September 2024. Results are discussed below.
The second half 2024 groundwater monitoring was conducted on September 3 and 4, 2024. Ten (10)
monitoring wells (MW-2, MW-3, MW-4, MW-6, MW-11, MW-23, MW-24, MW-25, MW-26, and MW-27) were
gauged and sampled by Arcadis. Groundwater samples were submitted to Pace Analytical National Center
for Testing & Innovation under standard chain-of-custody protocols. The groundwater monitoring field data
sheets are included in Attachment B. Laboratory analytical results are included in Attachment C.
Current and historical groundwater gauging and analytical results for constituents of potential concern
(COPC) are summarized in Table 1. Groundwater gauging and analytical results since the baseline
November 4, 2024

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groundwater monitoring event (December 2019 to present) for select wells are provided in Table 2. Current
and historical natural attenuation analytical results and field parameter results are presented in Table 3.
The site location and site plan are presented on Figures 1 and 2, respectively. A site groundwater elevation
contour map prepared using the September 3, 2024, groundwater elevation data is presented on Figure 3.
Depth to water measurements ranged from 10.36 feet (MW-26) to 12.48 feet (MW-6) below top-of-casing,
which is in line with historical observations. Groundwater elevations at surveyed wells ranged from 87.11
feet (MW-25) to 87.79 feet (MW-11), referenced to an arbitrary datum of 100 feet. The groundwater flow
and hydraulic gradient were generally consistent with previous monitoring events with a directional flow of
west-southwest and a hydraulic gradient of 0.003 feet per foot.
Groundwater analytical data from December 2019 through September 2024 is presented on Figure 4.
Following the implementation of PFBs, site COPC concentrations have generally decreased. Based on the
post injection monitoring data, concentrations of benzene reduced an order of magnitude at MW-6 (onsite),
and per the four years of data collected, appear to remain seasonally stable. In addition, benzene and TPH-
DRO (with SGC) has not been detected above the ISL at MW-4 (onsite) for the last four quarters. The onsite
benzene, TPH-GRO, and/or TPH-DRO concentrations at MW-1 and MW-6 do not exceed their respective
Tier 1 SLs.
The performance of the PFBs offsite is more difficult to assess as, due to subsurface obstructions, the PFBs
were installed side and downgradient of MW-23 and MW-24, and therefore data collected from the
downgradient wells (MW-25 through MW-27) provides more applicable data when evaluating the
performance of the injections with relation to sulfate concentrations. While the concentrations of benzene
and TPH-DRO exceed the ISL at MW-23 and MW-24, the concentrations appear stable to decreasing when
evaluating on a seasonal basis (fall to fall and spring to spring). With the exception of a magnitude of
increase of sulfate at MW-24 in May 2023, the wells did not appear to be within the radius of influence of
the sulfate injections, indicating that ongoing attenuation is likely from natural mechanisms.
Given the decreasing and/or stable hydrocarbon concentrations, continued PFB influence, recurring
seasonal influx of natural sulfate and low risk to human health as detailed in the Corrective Action
Completion Report and Closure Request (Arcadis 2023), Arcadis, has completed the continued monitoring
as requested by DERR (November 9, 2023) and recommends the site be evaluated for closure.
LIMITATIONS
This report was prepared in accordance with the scope of work outlined in Arcadis’ contract and with
generally accepted professional engineering and environmental consulting practices existing at the time this
report was prepared and applicable to the location of the site. It was prepared for the exclusive use of
CEMC, for the express purpose stated above. Any re-use of this report for a different purpose or by others
not identified above shall be at the user’s sole risk without liability to Arcadis. To the extent that this report
is based on information provided to Arcadis by third parties, Arcadis may have made efforts to verify this
third-party information, but Arcadis cannot guarantee the completeness or accuracy of this information. The
November 4, 2024

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opinions expressed and data collected are based on the conditions of the site existing at the time of the
field investigation. No other warranties expressed or implied are made by Arcadis.

Date: November 4, 2024
Gerald Robinson
Project Manager

Date: November 4, 2024

Taura Nichols, P.E.
Utah PE License #8568538-2202
Certified Consultant No. CC-0247

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ATTACHMENTS:

Table 1 Current and Historical Groundwater Gauging and Analytical Results
Table 2 Post Remediation Groundwater Gauging and Analytical Results - Select Wells
Table 3 Current and Historical Natural Attenuation Parameter Results

Figure 1 Site Location Map
Figure 2 Site Plan
Figure 3 Groundwater Elevation Contour Map – September 3, 2024
Figure 4 Groundwater Analytical Data – December 2019 - September 2024

Attachment A Field Data Sheets
Attachment B Laboratory Report and Chain-of-Custody Documentation
Attachment C Additional Sampling Requirement Directive dated April 14, 2023

REFERENCES:

Arcadis 2023. Corrective Action Completion Report and Closure Request. April 4.

TABLES
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10
BH-1 09/08/15 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --<0.046 --------
BH-2 09/08/15 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --<0.045 --------
BH-3 09/09/15 0.33 0.012 0.004 0.066 0.053 <0.003 --4.4 --0.840 --------
BH-4 09/09/15 0.012 0.003 0.002 0.015 0.023 <0.0005 --1.8 --0.210 --------
BH-5 09/09/15 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --0.260 --------
MW-1 03/02/89 2.7 3.9 1.6 12 ----36 ------99.52 9.12 0.00 90.40
MW-1 02/08/90 1.1 0.41 1.3 11 ----36 ------99.52 ------
MW-1 11/29/90 0.073 ND 0.232 2.35 ----15.8 ------99.52 ------
MW-1 04/23/91 0.115 0.0115 0.0325 0.894 ----15.7 ------99.52 10.45 0.00 89.07
MW-1 07/11/91 0.0062 ND 0.0068 0.289 ----5.39 ------99.52 9.41 0.00 90.11
MW-1 10/01/91 0.0032 ND ND 0.0655 ----2.12 ------99.39 9.61 0.00 89.78 Surveyed 10/91
MW-1 01/01/92 ND ND 0.009 0.161 ----0.460 ------99.39 9.00 0.00 90.39
MW-1 04/01/92 ND ND ND ND ----0.630 ------99.39 9.77 0.00 89.62
MW-1 07/01/92 ND ND 0.0033 0.0495 ----ND ------99.39 9.23 0.00 90.16
MW-1 10/01/92 0.0136 0.012 ND 0.0304 ----0.247 ------99.39 10.08 0.00 89.31
MW-1 01/21/93 ND ND 0.003 0.019 ----0.870 ------99.39 9.72 0.00 89.67
MW-1 04/26/93 ND 0.0006 0.0009 0.005 ----0.340 ------99.39 8.69 0.00 90.70
MW-1 07/20/93 0.001 ND 0.0005 0.009 ----0.250 ------99.39 9.13 0.00 90.26
MW-1 10/27/93 ND 0.0007 0.0006 0.003 ----0.100 ------99.39 9.74 0.00 89.65
MW-1 01/26/94 ND ND 0.001 0.004 ----0.230 ------99.39 9.38 0.00 90.01
MW-1 04/29/94 ND ND ND ND ----ND ------99.39 8.12 0.00 91.27
MW-1 07/28/94 ND ND ND 0.001 ----0.081 ------99.39 9.64 0.00 89.75
MW-1 10/11/94 ND 0.0013 ND 0.0013 ----0.085 ------99.39 9.71 0.00 89.68
MW-1 01/20/95 ND ND ND ND ----0.063 ------99.39 8.98 0.00 90.41
MW-1 04/21/95 ND 0.0007 ND ND ----ND ------99.39 8.93 0.00 90.46
MW-1 07/25/95 ND ND ND ND ----ND ------99.39 9.73 0.00 89.66
MW-1 07/02/96 ND ND ND ND ----ND ------99.39 9.60 0.00 89.79
MW-1 08/11/97 ND ND ND 0.003 ND ND 0.045 ------99.39 8.67 0.00 90.72
MW-1 08/31/98 ND ND ND ND ND ND ND ------99.39 9.17 0.00 90.22
MW-1 04/21/99 ND ND ND 0.00052 ND ND 0.230 ------99.39 8.91 0.00 90.48
MW-1 08/12/99 <0.0005 <0.0005 <0.0005 <0.0005 <0.035 <0.002 <0.00050 ------99.39 9.18 0.00 90.21
MW-1 11/10/99 --------------------99.39 9.52 0.00 89.87
MW-1 03/07/00 <0.0005 <0.0005 <0.0005 <0.0005 <0.035 <0.0025 <0.050 ------99.39 9.10 0.00 90.29
MW-1 05/17/00 --------------------99.39 9.66 0.00 89.73
MW-1 08/10/00 --------------------99.39 9.72 0.00 89.67
MW-1 11/08/00 <0.002 <0.002 <0.002 <0.006 <0.002 <0.002 <0.500 ------99.39 10.16 0.00 89.23
MW-1 02/06/01 <0.002 <0.002 <0.002 <0.006 <0.002 <0.002 <0.500 ------99.39 10.46 0.00 88.93
MW-1 05/01/01 --------------------99.39 9.93 0.00 89.46
MW-1 08/22/01 --------------------99.39 9.80 0.00 89.59
MW-1 11/15/01 --------------------99.39 10.58 0.00 88.81
MW-1 02/25/02 --------------------99.39 10.27 0.00 89.12
MW-1 05/21/02 --------------------99.39 9.20 0.00 90.19
MW-1 08/20/02 --------------------99.39 9.70 0.00 89.69
MW-1 11/05/02 --------------------99.39 10.07 0.00 89.32
MW-1 03/19/03 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0025 <0.050 ------99.39 9.96 0.00 89.43
MW-1 06/17/03 --------------------99.39 9.53 0.00 89.86
MW-1 09/30/03 --------------------99.39 9.88 0.00 89.51
MW-1 11/25/03 --------------------99.39 9.96 0.00 89.43
MW-1 12/01/07
MW-2 03/02/89 0.23 0.22 0.12 0.77 ----4.2 ------99.01 8.65 0.00 90.36
Not ApplicableDERR ISL
RBCA Tier 1 SL
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
71887 Tables 2SA24 2024_V0 1/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10 Not ApplicableDERR ISL
RBCA Tier 1 SL
MW-2 03/02/89 0.23 0.22 0.12 0.77 ----4.2 ------99.01 8.65 0.00 90.36
MW-2 01/26/90 0.081 0.04 ND 0.12 ----4.2 ------99.01 9.85 0.00 89.16
MW-2 11/29/90 0.056 ND ND 0.103 ----ND ------99.01 9.85 0.00 89.16
MW-2 04/23/91 0.0262 ND ND 0.0457 ----3.54 ------99.01 8.84 0.00 90.17
MW-2 07/11/91 ND ND ND ND ----0.251 ------99.01 9.00 0.00 90.01
MW-2 10/01/91 ND ND ND ND ----ND ------99.02 9.80 0.00 89.22 Surveyed 10/91
MW-2 01/01/92 ND ND ND 0.01 ----ND ------99.02 9.28 0.00 89.74
MW-2 04/01/92 ND ND ND ND ----ND ------99.02 9.36 0.00 89.66
MW-2 07/01/92 0.0018 0.0089 0.0065 0.0953 ----ND ------99.02 9.41 0.00 89.61
MW-2 10/01/92 ND ND ND ND ----ND ------99.02 9.77 0.00 89.25
MW-2 04/26/93 ND 0.002 0.004 0.051 ----0.470 ------99.02 8.59 0.00 90.43
MW-2 07/20/93 0.006 0.007 0.018 0.11 ----0.600 ------99.02 8.94 0.00 90.08
MW-2 10/27/93 0.003 0.014 0.013 0.15 ----1.2 ------99.02 9.39 0.00 89.63
MW-2 01/26/94 ND 0.0007 0.002 0.014 ----0.081 ------99.02 9.57 0.00 89.45
MW-2 04/29/94 ND ND ND 0.002 ----ND ------99.02 8.52 0.00 90.50
MW-2 07/28/94 ND 0.0022 0.017 0.065 ----0.58 ------99.02 9.61 0.00 89.41
MW-2 10/11/94 0.011 0.0072 0.006 0.21 ----1.7 ------99.02 9.57 0.00 89.45
MW-2 01/20/95 0.011 0.0035 0.0091 0.13 ----0.84 ------99.02 8.66 0.00 90.36
MW-2 04/21/95 ND 0.0033 0.0013 0.019 ----0.37 ------99.02 8.39 0.00 90.63
MW-2 07/25/95 ND 0.0059 0.058 0.33 ----4 ------99.02 9.24 0.00 89.78
MW-2 07/02/96 0.023 ND 0.021 0.094 ----4.2 ------99.02 9.13 0.00 89.89
MW-2 08/11/97 ND ND ND ND ND ND 0.077 ------99.02 8.61 0.00 90.41
MW-2 08/31/98 0.0019 ND ND ND 0.042 0.011 0.16 ------99.02 8.70 0.00 90.32
MW-2 04/21/99 0.0011 ND 0.00055 0.0019 ND ND 0.075 ------99.02 8.44 0.00 90.58
MW-2 08/12/99 0.00743 <0.0005 0.000838 0.00336 <0.035 <0.002 0.38 ------99.02 8.69 0.00 90.33
MW-2 11/10/99 --------------------99.02 9.03 0.00 89.99
MW-2 03/07/00 0.00156 <0.0005 0.000556 <0.0005 <0.035 <0.0025 0.264 ------99.02 8.68 0.00 90.34
MW-2 05/17/00 --------------------99.02 9.20 0.00 89.82
MW-2 08/10/00 --------------------99.02 9.22 0.00 89.80
MW-2 11/08/00 0.0031 0.0021 <0.002 0.0074 0.0032 <0.002 <0.500 ------99.02 9.70 0.00 89.32
MW-2 02/06/01 0.0034 <0.002 <0.002 <0.006 <0.002 <0.002 <0.500 ------99.02 10.02 0.00 89.00
MW-2 05/01/01 --------------------99.02 9.49 0.00 89.53
MW-2 08/22/01 --------------------99.02 9.33 0.00 89.69
MW-2 11/15/01 --------------------99.02 10.14 0.00 88.88
MW-2 02/25/02 --------------------99.02 9.88 0.00 89.14
MW-2 05/21/02 --------------------99.02 8.89 0.00 90.13
MW-2 08/20/02 0.0035 <0.0005 <0.0005 <0.0015 <0.001 <0.0025 0.22 ------99.02 9.21 0.00 89.81
MW-2 11/05/02 0.0016 <0.0005 <0.0005 <0.0015 <0.001 <0.0025 0.18 ------99.02 9.55 0.00 89.47
MW-2 03/19/03 <0.0005 <0.0005 <0.0005 <0.0015 <0.001 <0.0025 <0.050 ------99.02 9.05 0.00 89.97
MW-2 06/17/03 ND ND ND ND ND ND ND ------99.02 8.91 0.00 90.11
MW-2 09/30/03 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.050 ------99.02 9.40 0.00 89.62
MW-2 11/25/03 <0.0005 <0.0005 <0.0005 0.0005 <0.001 <0.0005 0.12 ------99.02 9.51 0.00 89.51
MW-2 12/13/07 <0.0005 <0.0005 <0.0005 <0.0005 0.002 <0.0005 --0.42 --0.18 99.02 10.21 0.00 88.81
MW-2 06/03/08 <0.0005 <0.0005 <0.0005 <0.0005 0.046 <0.0005 --1.1 0.45 --99.02 10.41 0.00 88.61
MW-2 12/01/08 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.050 0.48 --99.02 11.65 0.00 87.37
MW-2 06/01/09 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.077 0.23 --99.02 11.18 0.00 87.84
MW-2 11/30/09 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.050 0.29 --99.02 12.38 0.00 86.64
MW-2 06/03/10 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --0.15 99.02 11.07 0.00 87.95
MW-2 03/14/11 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --<0.050 99.02 10.08 0.00 88.94
MW-2 09/14/11 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --<0.050 99.02 10.74 0.00 88.28
71887 Tables 2SA24 2024_V0 2/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10 Not ApplicableDERR ISL
RBCA Tier 1 SL
MW-2 03/14/12 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --<0.050 98.68 13.13 0.00 85.55 Surveyed 11/11
MW-2 09/11/12 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.044 --<0.050 98.68 13.46 0.00 85.22
MW-2 03/12/13 <0.0005 <0.0005 0.001 0.0006 <0.001 <0.0005 --0.710 --0.067 98.68 14.27 0.00 84.41
MW-2 09/19/13 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.063 --<0.050 98.68 12.15 0.00 86.53
MW-2 04/07/14 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --<0.050 98.68 12.30 0.00 86.38
MW-2 07/21/14 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --<0.050 98.68 11.44 0.00 87.24
MW-2 09/09/15 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --<0.045 98.68 11.50 0.00 87.18
MW-2 05/01/17 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --<0.045 98.68 9.75 0.00 88.93
MW-2 09/06/17 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --<0.046 98.68 11.36 0.00 87.32
MW-2 12/12/19 <0.0002 <0.0002 <0.0004 <0.001 <0.001 <0.0002 --<0.025 --<0.045 98.68 11.43 0.00 87.25
MW-2 04/06/21 98.68 12.35 0.00 86.33
MW-2 09/13/21 <0.0000941 <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --0.0816 J <0.0314 --98.68 11.70 0.00 86.98
MW-2 03/31/22 <0.0000941 <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --<0.0314 0.0747 J --98.68 11.55 0.00 87.13
MW-2 06/08/22 98.68 11.41 0.00 87.27
MW-2 08/10/22 <0.0000941 <0.000278 <0.000137 <0.000174 0.00101 B J <0.000101 --<0.0314 <0.0247 --98.68 11.76 0.04*86.92
MW- 2 DUPLICATE 08/10/22 <0.000941 <00278 <0.00137 <0.00174 <0.010 <0.00101 --<0.0314 <0.0247 --98.68 11.76 0.04*86.92
MW-2 05/16/23 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --<0.0314 <0.0247 <0.0247 98.68 9.15 0.00 89.53
MW- 2 DUPLICATE 05/16/23 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --<0.0314 <0.0247 <0.0247 98.68 9.15 0.00 89.53
MW-2 08/08/23 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --<0.0314 0.0694 B J 0.0694 B J 98.68 10.96 0.00 87.72
MW- 2 DUPLICATE 08/08/23 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --<0.0314 0.0670 B J 0.0684 B J 98.68 10.96 0.00 87.72
MW-2 04/15/24 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.0458 B J 0.0327 J <0.0247 98.68 9.22 0.00 89.46
MW-2 09/03/24 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 C3 <0.000101 --0.0477 B J 0.0633 J 0.0633 J 98.68 11.24 0.00 87.44
MW-3 03/02/89 1 1.4 0.22 1.3 ----5.6 ------98.96 8.49 0.00 90.47
MW-3 03/02/89 1 1.4 0.22 1.3 ----5.6 ------98.96 8.49 0.00 90.47
MW-3 01/26/90 0.13 0.048 0.016 0.10 ----3.4 ------98.96 9.62 0.00 89.34
MW-3 11/29/90 ND ND ND ND ----ND ------98.96 ------
MW-3 04/23/91 0.0033 ND ND ND ----ND ------98.96 9.71 0.00 89.25
MW-3 07/11/91 ND ND ND ND ----0.581 ------98.96 8.83 0.00 90.13
MW-3 10/01/91 ND ND ND ND ----ND ------98.93 9.68 0.00 89.25 Surveyed 10/91
MW-3 01/01/92 0.0586 ND ND 0.0094 ----ND ------98.93 ------
MW-3 04/01/92 ND ND ND ND ----ND ------98.93 9.22 0.00 89.71
MW-3 07/01/92 0.065 0.0108 0.0098 0.0204 ----ND ------98.93 9.30 0.00 89.63
MW-3 10/01/92 0.0881 0.0094 0.142 0.0267 ----0.263 ------98.93 9.65 0.00 89.28
MW-3 04/26/93 0.088 0.003 0.004 0.006 ----0.390 ------98.93 8.44 0.00 90.49
MW-3 07/20/93 0.51 0.01 0.006 0.018 ----1.1 ------98.93 8.80 0.00 90.13
MW-3 10/27/93 0.57 0.066 0.031 0.069 ----2.5 ------98.93 9.27 0.00 89.66
MW-3 01/26/94 0.042 0.004 0.013 0.009 ----0.42 ------98.93 9.42 0.00 89.51
MW-3 04/29/94 0.07 0.0027 0.0006 0.0067 ----0.40 ------98.93 8.39 0.00 90.54
MW-3 07/28/94 0.18 0.024 0.03 0.021 ----0.98 ------98.93 9.49 0.00 89.44
MW-3 10/11/94 0.22 0.024 0.024 0.025 ----1.5 ------98.93 9.48 0.00 89.45
MW-3 01/20/95 0.002 0.0008 0.0007 0.0012 ----0.092 ------98.93 8.53 0.00 90.40
MW-3 04/21/95 0.0016 0.0006 ND ND ----ND ------98.93 8.21 0.00 90.72
MW-3 07/28/95 0.11 0.0019 0.0025 0.0056 ----0.37 ------98.93 9.11 0.00 89.82
MW-3 07/02/96 0.023 ND ND ND ----0.14 ------98.93 9.02 0.00 89.91
MW-3 08/11/97 0.016 ND ND 0.012 ND ND ND ------98.93 8.50 0.00 90.43
MW-3 08/31/98 0.0082 0.0026 0.0013 0.0038 ND 0.013 0.10 ------98.93 8.62 0.00 90.31
MW-3 04/21/99 0.16 0.34 0.034 0.13 ND ND 1.2 ------98.93 8.35 0.00 90.58
MW-3 08/12/99 0.0231 0.012 0.0101 0.031 <0.350 <0.020 <0.500 ------98.93 8.61 0.00 90.32
MW-3 11/10/99 --------------------98.93 8.92 0.00 90.01
MW-3 03/07/00 0.0129 0.00433 0.00525 0.00846 <0.035 <0.0025 0.456 ------98.93 8.58 0.00 90.35
MW-3 05/17/00 --------------------98.93 9.10 0.00 89.83
MW-3 08/10/00 --------------------98.93 9.13 0.00 89.80
MW-3 11/08/00 --------------------98.93 9.64 0.00 89.29
MW-3 02/06/01 0.0181 0.0027 0.0072 0.0197 0.0098 <0.002 0.620 ------98.93 9.93 0.00 89.00
ONLY NATURAL ATTENUATION SAMPLES
ONLY NATURAL ATTENUATION SAMPLES
71887 Tables 2SA24 2024_V0 3/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10 Not ApplicableDERR ISL
RBCA Tier 1 SL
MW-3 05/01/01 --------------------98.93 9.39 0.00 89.54
MW-3 08/22/01 --------------------98.93 9.24 0.00 89.69
MW-3 11/15/01 --------------------98.93 10.01 0.00 88.92
MW-3 02/25/02 --------------------98.93 9.75 0.00 89.18
MW-3 05/21/02 --------------------98.93 8.74 0.00 90.19
MW-3 08/20/02 --------------------98.93 9.10 0.00 89.83
MW-3 11/05/02 --------------------98.93 9.48 0.00 89.45
MW-3 03/19/03 0.0086 0.0031 0.0065 0.018 0.011 <0.0025 0.83 ------98.93 9.37 0.00 89.56
MW-3 06/17/03 --------------------98.93 8.92 0.00 90.01
MW-3 09/30/03 --------------------98.93 9.29 0.00 89.64
MW-3 11/25/03 --------------------98.93 9.40 0.00 89.53
MW-3 12/13/07 0.002 0.0006 0.002 0.002 0.004 <0.0005 --1.1 --1.1 98.93 10.09 0.00 88.84
MW-3 06/03/08 <0.0005 <0.0005 <0.0005 <0.0005 0.006 <0.0005 --0.76 0.64 --98.93 10.12 0.00 88.81
MW-3 12/01/08 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.32 1.5 --98.93 11.45 0.00 87.48
MW-3 06/01/09 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.13 0.47 --98.93 10.85 0.00 88.08
MW-3 11/30/09 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.088 1.1 --98.93 12.16 0.00 86.77
MW-3 06/03/10 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.13 --0.74 98.93 10.79 0.00 88.14
MW-3 03/14/11 0.0006 <0.0005 0.0008 <0.0005 0.002 <0.0005 --0.22 --0.56 98.93 9.95 0.00 88.98
MW-3 09/14/11 <0.0005 <0.0005 <0.0005 0.0009 0.003 <0.0005 --0.19 --0.12 98.93 10.55 0.00 88.38
MW-3 03/14/12 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.065 --0.069 98.66 12.90 0.00 85.76 Surveyed 11/11
MW-3 09/11/12 0.001 <0.0005 0.001 0.001 <0.001 <0.0005 --0.17 --0.063 98.66 14.23 0.00 84.43
MW-3 03/12/13 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.18 --0.17 98.66 13.93 0.00 84.73
MW-3 09/19/13 0.0006 <0.0005 0.0008 <0.0005 0.002 <0.0005 --0.22 --0.15 98.66 11.95 0.00 86.71
MW-3 04/07/14 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.065 --0.071 98.66 12.16 0.00 86.50
MW-3 07/21/14 0.002 <0.0005 0.002 0.0006 0.006 <0.0005 --0.43 --0.090 98.66 11.22 0.00 87.44
MW-3 09/09/15 <0.0005 <0.0005 <0.0005 <0.0005 0.004 <0.0005 --0.19 --0.11 98.66 11.25 0.00 87.41
MW-3 01/10/17 <0.0005 <0.0005 <0.0005 <0.0005 0.003 <0.0005 --0.13 --<0.046 98.66 11.86 0.00 86.80
MW-3 05/01/17 0.001 <0.0005 0.0007 0.0006 0.01 <0.0005 --0.26 --0.046 98.66 9.48 0.00 89.18
MW-3 09/06/17 0.001 <0.0005 <0.0005 <0.0005 0.008 <0.0005 --0.35 --0.047 98.66 11.13 0.00 87.53
MW-3 12/12/19 <0.0002 <0.0002 <0.0004 <0.001 <0.001 <0.0002 --0.045 J --<0.046 98.66 11.27 0.00 87.39
MW-3 04/06/21 98.66 12.85 0.00 85.81
MW-3 09/13/21 0.000151 J <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --0.121 0.253 --98.66 11.54 0.00 87.12
MW-3 03/31/22 0.000144 J <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --0.188 B 0.401 --98.66 11.41 0.00 87.25
MW-3 06/09/22 98.66 11.21 0.00 87.45
MW-3 08/10/22 0.000345 J <0.000278 <0.000137 <0.000174 0.00140 B J <0.000101 --0.197 B 0.15 --98.66 11.54 0.01*87.12
MW-3 05/16/23 0.000332 J <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.0356 J 0.588 <0.0247 98.66 8.89 0.00 89.77
MW-3 08/08/23 0.000167 J <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.1040 0.678 0.102 B 98.66 10.88 0.00 87.78
MW-3 04/15/24 0.000132 J <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.0720 B J 0.771 <0.0247 98.66 8.92 0.00 89.74
MW-3 09/03/24 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 C3 <0.000101 --0.0890 B J 0.384 0.106 B 98.66 11.08 0.00 87.58
MW-4 04/23/91 0.4 0.229 0.0245 7.66 ----------99.17 10.25 0.00 88.92
MW-4 01/20/93 --------------------98.94 9.57 0.50 89.75 Surveyed 10/91
MW-4 04/19/93 --------------------98.94 8.82 0.60 90.57
MW-4 07/20/93 0.23 0.019 0.039 0.049 ----0.720 ------98.94 9.30 0.48 90.00
MW-4 10/27/93 --------------------98.94 10.04 0.63 89.37
MW-4 01/26/94 --------------------98.94 9.60 0.24 89.52
MW-4 04/29/94 --------------------98.94 8.45 0.03 90.51
MW-4 01/20/95 --------------------98.94 8.77 0.01 90.18
MW-4 07/02/96 0.47 0.084 0.06 0.8 ----8.9 ------98.94 9.32 0.00 89.62
MW-4 08/11/97 0.96 0.080 ND 0.34 ND ND 9.0 ------98.94 8.80 0.00 90.14
MW-4 08/31/98 1.5 0.013 ND 0.054 ND 0.230 4.5 ------98.94 8.87 0.00 90.07
MW-4 04/21/99 0.96 0.016 0.014 0.06 ND ND 2.0 ------98.94 8.60 0.00 90.34
MW-4 08/12/99 0.981 0.0644 0.0184 0.0969 0.383 <0.020 14.0 ------98.94 8.86 0.00 90.08
MW-4 11/10/99 1.21 <0.050 <0.050 0.104 <3.500 <0.200 12.9 ------98.94 9.10 0.00 89.84
MW-4 03/07/00 0.901 0.0141 <0.010 <0.010 <0.700 <0.050 3.26 ------98.94 8.76 0.00 90.18
ONLY NATURAL ATTENUATION SAMPLES
ONLY NATURAL ATTENUATION SAMPLES
71887 Tables 2SA24 2024_V0 4/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10 Not ApplicableDERR ISL
RBCA Tier 1 SL
MW-4 05/17/00 0.634 0.0177 0.016 0.109 0.118 <0.002 4.2 ------98.94 9.20 0.00 89.74
MW-4 08/10/00 0.822 0.0209 <0.020 0.128 0.115 <0.020 3.5 ------98.94 9.35 0.00 89.59
MW-4 11/08/00 --------------------98.94 9.75 0.03 89.21
MW-4 02/06/01 --------------------98.94 10.06 0.06 88.93
MW-4 05/01/01 0.751 0.0268 0.0193 0.0989 0.0468 <0.100 2.4 ------98.94 9.56 0.00 89.38
MW-4 08/22/01 1.5 0.029 0.026 0.14 0.120 <0.002 4.8 ------98.94 9.43 0.00 89.51
MW-4 11/15/01 --------------------98.94 10.15 0.05 88.83
MW-4 02/25/02 --------------------98.94 9.84 0.04 89.13
MW-4 05/21/02 0.67 0.018 0.015 0.087 0.110 <0.020 5.5 ------98.94 8.91 0.00 90.03
MW-4 08/20/02 0.60 0.021 0.017 0.11 0.130 <0.025 4.0 ------98.94 9.22 0.00 89.72
MW-4 11/05/02 0.59 0.022 0.018 0.12 0.120 <0.050 4.2 ------98.94 9.57 0.00 89.37
MW-4 03/19/03 0.16 0.0077 0.009 0.055 0.060 <0.013 3.1 ------98.94 9.35 0.00 89.59
MW-4 06/17/03 0.15 0.005 0.005 0.030 0.037 ND 1.5 ------98.94 9.06 0.00 89.88
MW-4 09/30/03 0.17 0.009 0.008 0.046 0.045 <0.0005 2.3 ------98.94 9.37 0.00 89.57
MW-4 11/25/03 0.017 0.002 0.002 0.010 0.010 <0.0005 0.990 ------98.94 9.46 0.00 89.48
MW-4 12/13/07 0.0006 <0.0005 <0.0005 <0.0005 0.002 <0.0005 --0.280 --30 98.94 10.13 0.00 88.81
MW-4 06/03/08 0.005 0.0009 <0.0005 0.001 0.003 <0.0005 --0.500 19 --98.94 10.42 0.00 88.52
MW-4 12/01/08 0.072 0.004 0.001 0.005 0.002 <0.0005 --2.0 49 --98.94 11.60 0.00 87.34
MW-4 06/01/09 0.021 0.002 0.0007 0.003 0.002 <0.0005 --1.7 66 --98.94 11.31 0.00 87.63
MW-4 11/30/09 0.005 0.0008 <0.0005 0.002 0.001 <0.0005 --1.8 14 --98.94 12.34 0.00 86.60
MW-4 06/03/10 0.004 <0.0005 <0.0005 0.002 <0.001 <0.0005 --0.500 --26 98.94 11.11 0.00 87.83
MW-4 03/14/11 <0.0005 0.0006 <0.0005 <0.0005 <0.001 <0.0005 --0.440 --12 98.94 10.28 0.00 88.66
MW-4 09/14/11 0.024 0.004 0.002 0.007 0.002 <0.0005 --0.780 --6.7 98.94 10.50 0.00 88.44
MW-4 03/14/12 0.054 0.003 0.001 0.006 0.001 <0.0005 --3.6 ----98.20 12.91 0.00 85.29 Surveyed 11/11
MW-4 09/11/12 0.068 0.006 0.003 0.014 0.003 <0.0005 --2.2 --6.3 98.20 13.18 0.00 85.02
MW-4 03/12/13 0.077 0.005 0.004 0.019 0.003 <0.0005 --2.8 --35 98.20 13.91 0.00 84.29
MW-4 06/03/13 0.098 0.006 0.005 0.024 0.004 <0.0005 --2.8 --10 98.20 13.08 0.00 85.12
MW-4 07/09/13
MW-4 07/09/13 0.009 0.0007 <0.022 0.001 <0.001 <0.0005 --0.440 --9.3 98.20 13.25 0.00 84.95
MW-4 08/14/13 0.026 0.001 <0.0005 0.005 <0.001 <0.0005 --1.2 --2.1 98.20 11.98 0.00 86.22
MW-4 09/19/13 0.055 0.003 0.001 0.01 0.002 <0.0005 --2.0 --1.4 98.20 11.86 0.00 86.34
MW-4 04/07/14 0.057 0.002 0.001 0.009 0.002 <0.0005 --1.4 --1.6 98.20 11.95 0.00 86.25
MW-4 07/21/14 0.063 0.002 0.002 0.011 0.003 <0.0005 --1.9 --7.4 98.20 11.19 0.00 87.01
MW-4 09/09/15 0.045 0.002 0.002 0.011 0.002 <0.0005 --1.9 --5.4 98.20 11.25 0.00 86.95
MW-4 01/10/17 0.027 0.002 0.002 0.011 0.003 <0.0005 --1.3 --5.6 98.20 11.72 0.00 86.48
MW-4 05/01/17 0.004 0.001 0.002 0.006 0.015 <0.0005 --1.5 --3.4 98.20 9.63 0.00 88.57
MW-4 09/06/17 0.012 0.001 0.0007 0.004 0.001 <0.0005 --1.0 --1.6 98.20 11.10 0.00 87.10
MW-4 12/12/19 0.007 J*0.0009 J <0.0004 0.005 J 0.003 J <0.0002 --0.910 --1.2 98.20 11.15 0.00 87.05
MW-4 04/06/21 98.20 12.08 0.00 86.12
MW-4 09/13/21 0.00761 0.00179 0.000787 J 0.00705 0.00185 J <0.000101 --8.35 1.38 --98.20 11.40 0.00 86.80
MW-4 03/31/22 0.00432 0.000305 J <0.000137 0.00126 J <0.001 <0.000101 --1.11 12.2 --98.20 11.29 0.00 86.91
MW-4 06/08/22 98.20 11.08 0.00 87.12
MW-4 08/10/22 0.016 0.00168 0.000464 J 0.00369 0.00170 B J <0.000101 --2.11 24.1 --98.20 11.39 0.01*86.81
MW-4 05/16/23 0.00127 0.000280 J <0.000137 0.000786 J <0.00100 <0.000101 --0.601 0.415 <0.0247 98.20 8.96 0.00 89.24
MW-4 08/09/23 0.00450 0.000835 J 0.000948 J 0.004420 0.010 <0.000101 --0.931 2.010 0.43 98.20 10.00 0.00 88.20
MW-4 04/16/24 0.000920 J 0.000307 J 0.000201 J 0.00134 J 0.00127 J <0.000101 --0.776 0.995 <0.0247 98.20 9.00 0.00 89.20
MW-4 09/04/24 0.00411 0.00158 0.000665 J 0.00368 0.00111 J <0.000101 --0.798 B 2.76 0.315 B 98.20 10.94 0.00 87.26
MW-5 03/02/89 1.1 1.6 0.25 1.5 ----6.6 ------100.03 ------
MW-5 06/21/89 2.2 0.24 0.42 2.0 ----20 ------100.03 10.76 0.00 89.27
MW-5 04/23/91 0.555 0.304 0.179 7.83 ----1,670 ------100.03 11.40 0.00 88.63
MW-5 04/19/93 --------------------99.95 9.79 0.00 90.16 Surveyed 10/91
MW-5 07/20/93 --------------------99.95 10.10 0.00 89.85
MW-5 10/27/93 --------------------99.95 10.52 0.00 89.43
MW-5 01/26/94 --------------------99.95 10.72 0.00 89.23
HYDROGEN PEROXIDE AMENDMENT ADDED DIRECTLY TO WELL IN JUNE AND JULY 2013
ONLY NATURAL ATTENUATION SAMPLES
ONLY NATURAL ATTENUATION SAMPLES
71887 Tables 2SA24 2024_V0 5/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10 Not ApplicableDERR ISL
RBCA Tier 1 SL
MW-5 04/29/94 --------------------99.95 9.72 0.00 90.23
MW-5 07/28/94 --------------------99.95 10.60 0.00 89.35
MW-5 10/11/94 0.32 0.019 0.014 0.063 ----2.9 ------99.95 10.65 0.00 89.30
MW-5 01/20/95 0.35 0.014 0.017 0.054 ----1.5 ------99.95 9.75 0.00 90.20
MW-5 04/21/95 --------------------99.95 ----99.95
MW-5 07/25/95
MW-6 06/21/89 7.9 8.3 1.3 9.3 ----60 ------99.83 10.53 0.00 89.30
MW-6 01/26/90 6.7 5.0 0.840 4.6 ----34 ------99.83 10.74 0.00 89.09
MW-6 11/29/90 3.53 4.66 0.360 5.91 ----25.5 ------99.83 ------
MW-6 04/23/91 0.371 0.0482 0.0074 2.18 ----23.8 ------99.83 10.68 0.00 89.15
MW-6 07/11/91 0.605 0.62 14.3 1.54 ----13.3 ------99.83 9.42 0.00 90.41
MW-6 04/01/92 3.38 1.5 0.37 4.22 ----454 ------99.71 10.15 0.00 89.56 Surveyed 10/91
MW-6 07/01/92 2.78 1.42 0.453 4.11 ----25.5 ------99.71 9.86 0.00 89.85
MW-6 01/20/93 --------------------99.71 10.61 0.50 89.48
MW-6 04/19/93 --------------------99.71 9.13 0.40 90.88
MW-6 07/20/93 --------------------99.71 9.55 0.20 90.31
MW-6 10/27/93 --------------------99.71 9.25 0.28 90.67
MW-6 04/29/94 --------------------99.71 7.48 0.02 92.25
MW-6 01/20/95 --------------------99.71 9.90 0.01 89.82
MW-6 07/02/96 0.160 0.030 0.012 2.1 ----11 ------99.71 10.63 0.00 89.08
MW-6 08/11/97 0.770 ND ND 0.500 ND ND 1.3 ------99.71 9.85 0.00 89.86
MW-6 08/31/98 0.390 ND ND 0.026 ND 0.16 2.2 ------99.71 9.70 0.00 90.01
MW-6 11/10/99 0.392 0.102 0.0461 0.514 <0.350 <0.020 3.36 ------99.71 9.81 0.00 89.90
MW-6 03/07/00 1.06 0.0928 0.0486 0.274 <0.350 <0.025 4.08 ------99.71 9.50 0.00 90.21
MW-6 05/17/00 0.858 0.171 0.0125 0.941 0.0704 <0.020 7.3 ------99.71 9.96 0.00 89.75
MW-6 08/10/00 0.789 0.143 0.132 1.11 0.0893 <0.010 8.3 ------99.71 10.10 0.00 89.61
MW-6 11/08/00 0.735 0.0985 0.112 0.845 0.0863 <0.010 1.8 ------99.71 10.53 0.00 89.18
MW-6 02/06/01 0.851 0.0829 0.0745 0.490 0.0396 <0.010 5.8 ------99.71 10.69 0.00 89.02
MW-6 05/01/01 0.988 0.128 0.154 0.904 <0.100 <0.100 9.5 ------99.71 10.27 0.00 89.44
MW-6 08/22/01 0.760 0.098 0.11 0.430 0.08 <0.002 4.1 ------99.71 10.04 0.00 89.67
MW-6 11/15/01 0.630 0.069 0.09 0.500 0.056 <0.100 4.8 ------99.71 10.93 0.00 88.78
MW-6 02/25/02 0.990 0.067 0.096 0.440 0.062 <0.025 6.4 ------99.71 10.55 0.00 89.16
MW-6 05/21/02 1.40 0.094 0.17 0.710 0.085 0.045 9.1 ------99.71 9.77 0.00 89.94
MW-6 08/20/02 0.790 0.120 0.15 0.710 0.11 0.031 6.9 ------99.71 10.04 0.00 89.67
MW-6 11/05/02 0.630 0.068 0.093 0.390 0.068 <0.013 5.1 ------99.71 10.42 0.00 89.29
MW-6 03/19/03 2.0 0.099 0.12 0.320 0.058 <0.025 7.4 ------99.71 10.32 0.00 89.39
MW-6 06/17/03 1.2 0.120 0.18 0.540 0.088 ND 7.1 ------99.71 9.92 0.00 89.79
MW-6 09/30/03 1.4 0.051 0.2 0.360 0.097 <0.001 6.7 ------99.71 10.23 0.00 89.48
MW-6 11/25/03 1.0 0.022 0.12 0.160 0.055 <0.0005 4.8 ------99.71 10.33 0.00 89.38
MW-6 12/13/07 0.770 0.041 0.015 0.093 0.012 <0.001 --3.6 --14 99.71 10.95 0.00 88.76
MW-6 06/03/08 0.750 0.044 0.011 0.073 0.009 <0.0005 --3.7 42 --99.71 11.26 0.00 88.45
MW-6 12/01/08 DRY DRY 99.71 12.41 0.00 87.30
MW-6 06/01/09 DRY DRY 99.71 ------
MW-6 06/03/10 DRY DRY 99.71 ------
MW-6 03/14/11 1.7 0.033 0.048 0.170 0.031 <0.003 --8.5 --18 99.71 11.11 0.00 88.60
MW-6 09/14/11 1.5 0.300 0.7 2.3 0.16 <0.0005 --31 --6.3 99.71 12.00 0.00 87.71
MW-6 03/14/12 0.410 0.078 0.21 0.650 0.07 <0.003 --13 --5.3 99.75 14.50 0.00 85.25 Surveyed 11/11
MW-6 09/11/12 3.2 0.790 0.71 2.1 0.15 <0.005 --20 --1.8 99.75 14.75 0.00 85.00
MW-6 03/12/13 1.4 0.170 0.19 0.710 0.048 <0.0005 --11 --3.5 99.75 15.50 0.00 84.25
MW-6 06/03/13 3.2 0.350 0.43 1.2 0.077 <0.003 --15 --3.3 99.75 14.23 0.00 85.52
MW-6 --
MW-6 07/09/13 0.008 <0.0005 <0.0005 0.0009 <0.001 <0.0005 --0.170 --1.2 99.75 14.80 0.00 84.95
MW-6 08/14/13 0.015 0.001 0.0008 0.004 <0.001 <0.0005 --0.300 --0.810 99.75 13.58 0.00 86.17
MW-6 09/19/13 0.820 0.014 0.061 0.075 0.02 <0.0005 --2.6 --0.860 99.75 13.41 0.00 86.34
MW-6 04/07/14 1.2 0.027 0.076 0.055 0.014 <0.0005 --3.7 --0.920 99.75 13.53 0.00 86.22
DRY
DRY
INSUFFICIENT WATER TO SAMPLE
WELL WAS DESTROYED
HYDROGEN PEROXIDE AMENDMENT ADDED DIRECTLY TO WELL IN JUNE AND JULY 2013
71887 Tables 2SA24 2024_V0 6/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10 Not ApplicableDERR ISL
RBCA Tier 1 SL
MW-6 --
MW-6 07/21/14 1.9 0.039 0.061 0.084 0.02 <0.003 --4.0 --1.9 99.75 12.78 0.00 86.97
MW-6 09/09/15 1.7 0.074 0.095 0.140 0.03 <0.0005 --5.9 --3.1 99.75 12.75 0.00 87.00
MW-6 01/10/17 0.810 0.006 0.008 0.014 0.007 <0.0005 --2.3 --0.150 99.75 13.28 0.00 86.47
MW-6 05/01/17 1.3 0.009 0.031 0.023 0.013 <0.003 --3.1 --0.240 99.75 11.18 0.00 88.57
MW-6 09/06/17 2.4 0.022 0.2 0.026 0.034 <0.010 --6.9 --0.140 99.75 12.66 0.00 87.09
MW-6 12/12/19 1.2 J*0.017 0.015 0.020 J 0.018 J <0.002 --3.4 --0.110 J 99.75 12.71 0.00 87.04
MW-6 DUPLICATE 12/12/19 1.2 J*0.016 0.016 0.016 J 0.017 J <0.002 --3.2 --0.110 99.75 12.71 0.00 87.04
MW-6 04/06/21 99.75 13.56 0.00 86.19
MW-6 06/17/21
MW-6 09/13/21 0.168 0.00185 0.00164 0.00381 0.00148 J <0.000101 --0.802 0.807 --99.75 12.95 0.00 86.80
MW-6 DUPLICATE 09/13/21 0.167 0.00165 0.00159 0.00371 0.0016 J <0.000101 --0.780 0.838 --99.75 12.95 0.00 86.80
MW-6 12/28/21 0.0641 0.000774 J 0.000247 J 0.00145 J <0.001 <0.000101 --0.315 0.246 --99.75 13.45 0.00 86.30
MW-6 DUPLICATE 12/28/21 0.0640 0.000794 J 0.000242 J 0.0015 J <0.001 <0.000101 --0.359 0.270 --99.75 13.45 0.00 86.30
MW-6 03/31/22 0.0365 0.000574 J <0.000137 0.000847 J <0.001 <0.000101 --0.163 B 0.241 --99.75 13.31 0.00 86.44
MW-6 06/08/22 0.0411 0.000403 J 0.000144 J 0.000829 J <0.001 <0.000101 --0.300 0.196 --99.75 12.65 0.00 87.10
MW-6 08/10/22 0.0176 <0.00278 <0.00137 <0.00174 <0.010 <0.00101 --0.0964 B J 0.336 --99.75 12.96 0.01*86.79
MW-6 05/16/23 0.184 0.0213 <0.000137 0.0639 <0.00100 <0.000101 --0.101 0.0992 J 0.0990 J 99.75 10.55 0.00 89.20
MW-6 08/09/23 0.185 <0.00278 <0.00137 <0.00174 <0.0100 <0.00101 --0.699 0.645 0.232 B 99.75 12.25 0.00 87.50
MW-6 04/16/24 0.0388 0.000417 J 0.000143 J 0.000638 J <0.00100 <0.000101 --0.170 B 0.223 B <0.0247 99.75 10.59 0.00 89.16
MW-6 DUPLICATE 04/16/24 0.0273 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.142 B 0.216 B <0.0247 99.75 10.59 0.00 89.16
MW-6 09/04/24 0.184 0.00217 0.000437 J 0.00359 0.00179 J <0.000101 --1.09 0.601 0.388 B 99.75 12.48 0.00 87.27
MW-6 DUPLICATE 09/04/24 0.170 0.00197 0.000375 J 0.00331 0.00153 J <0.000101 --1.01 0.589 0.378 B 99.75 12.48 0.00 87.27
MW-7 06/21/89 0.9 0.1 0.07 0.57 ----4.3 ------98.08 8.85 0.00 89.23
MW-7 01/26/90 2.1 0.068 0.015 0.19 ----3.9 ------98.08 9.03 0.00 89.05
MW-7 11/29/90 1.3 ND ND ND ----1.99 ------98.08 ----98.08
MW-7 04/23/91 ND ND ND 0.0058 ----1.8 ------98.08 9.09 0.00 88.99
MW-7 07/11/91 ND ND ND ND ----1.67 ------98.08 8.31 0.00 89.77
MW-7 10/01/91 ND ND ND 0.0655 ----ND ------98.08 9.12 0.00 88.96
MW-7 01/01/92 0.303 ND ND 0.0137 ----0.300 ------98.08 8.60 0.00 89.48
MW-7 04/01/92 0.0367 ND ND 0.0107 ----0.390 ------98.08 8.65 0.00 89.43
MW-7 07/01/92 0.837 ND ND 0.0845 ----1.48 ------98.08 8.75 0.00 89.33
MW-7 10/01/92 1.06 ND ND 0.053 ----1.84 ------98.08 9.06 0.00 89.02
MW-7 01/21/93 1.3 0.018 0.011 0.053 ----3.1 ------98.08 8.61 0.00 89.47
MW-7 04/25/93 0.89 0.076 0.053 0.15 ----2.0 ------98.08 7.94 0.00 90.14
MW-7 07/20/93 --------------------98.08 8.30 0.00 89.78
MW-7 10/27/93 0.13 0.009 0.003 0.016 ----0.320 ------98.08 8.67 0.00 89.41
MW-7 01/26/94 0.23 0.003 0.0007 0.007 ----0.370 ------98.08 8.84 0.00 89.24
MW-7 04/29/94 0.011 0.0008 ND 0.0023 ----0.070 ------98.08 7.88 0.00 90.20
MW-7 07/28/94 0.065 0.0008 ND 0.0031 ----0.130 ------98.08 8.90 0.00 89.18
MW-7 10/11/94 0.12 0.0016 0.0006 0.0035 ----0.370 ------98.08 8.83 0.00 89.25
MW-7 01/20/95 ND ND ND ND ----ND ------98.08 9.05 0.00 89.03
MW-7 04/21/95 0.0082 0.0007 ND 0.0006 ----0.059 ------98.08 7.73 0.00 90.35
MW-7 07/25/95 0.0038 ND ND ND ----ND ------98.08 8.55 0.00 89.53
MW-7 07/02/96 0.0033 ND ND ND ----ND ------98.08 8.48 0.00 89.60
MW-7 08/31/98 0.330 0.0039 ND 0.020 ND 0.028 0.500 ------98.08 8.07 0.00 90.01
MW-7 04/21/99 0.270 0.0084 ND 0.022 ND ND 0.420 ------98.08 7.84 0.00 90.24
MW-7 08/12/99 0.490 0.040 0.015 0.219 <0.070 <0.004 2.0 ------98.08 8.05 0.00 90.03
MW-7 11/10/99 0.619 0.00952 <0.005 0.059 <0.350 <0.020 1.8 ------98.08 8.35 0.00 89.73
MW-7 03/07/00 0.246 0.0598 0.00676 0.0693 <0.035 <0.0025 0.947 ------98.08 7.97 0.00 90.11
MW-7 05/17/00 0.346 0.0133 <0.002 0.0821 0.0082 <0.002 1.4 ------98.08 8.54 0.00 89.54
MW-7 08/10/00 0.730 0.131 0.120 1.01 0.0803 <0.010 7.3 ------98.08 8.59 0.00 89.49
MW-7 11/08/00 0.0122 <0.002 <0.002 <0.006 <0.002 <0.002 <0.500 ------98.08 9.00 0.00 89.08
MW-7 02/06/01 0.238 <0.010 <0.010 <0.030 <0.010 <0.010 0.810 ------98.08 9.26 0.00 88.82
PERMEABLE FILLED BORINGS WITH SULFATE ADDED UPGRADIENT AND DOWNGRADIENT
ONLY NATURAL ATTENUATION SAMPLES
HYDROGEN PEROXIDE AMENDMENT ADDED DIRECTLY TO WELL IN APRIL AND JULY 2014
71887 Tables 2SA24 2024_V0 7/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10 Not ApplicableDERR ISL
RBCA Tier 1 SL
MW-7 05/01/01 0.048 <0.002 <0.002 <0.006 <0.002 <0.002 <0.500 ------98.08 8.78 0.00 89.30
MW-7 12/01/07
MW-8 08/01/89 0.71 4 1.1 8.7 ----51 ------98.4 9.19 0.00 89.21
MW-8 01/26/90 0.8 1.4 0.63 2.4 ----60 ------98.4 9.38 0.00 89.02
MW-8 11/14/90 0.083 0.207 0.449 1.25 ----7.12 ------98.4 9.70 0.00 88.70
MW-8 04/23/91 0.241 0.225 0.648 3.4 ----18.5 ------98.4 9.50 0.00 88.90
MW-8 07/11/91 0.195 0.123 0.319 1.0 ----14.2 ------98.4 8.85 0.00 89.55
MW-8 10/01/91 0.132 0.224 0.33 1.7 ----9.4 ------98.4 9.49 0.00 88.91
MW-8 01/01/92 0.109 0.037 0.312 1.06 ----3.83 ------98.4 9.00 0.00 89.40
MW-8 04/01/92 0.103 0.0104 0.197 0.51 ----4.05 ------98.4 9.06 0.00 89.34
MW-8 07/01/92 0.0532 0.0058 0.163 0.338 ----1.84 ------98.4 9.13 0.00 89.27
MW-8 10/01/92 0.118 ND 0.261 0.587 ----2.87 ------98.4 9.45 0.00 88.95
MW-8 01/21/93 0.24 0.058 0.43 1.0 ----6.4 ------98.4 8.96 0.00 89.44
MW-8 04/26/93 0.057 0.021 0.37 0.91 ----6.7 ------98.4 8.40 0.00 90.00
MW-8 07/20/93 0 0.028 0.33 1.2 ----5.8 ------98.4 8.71 0.00 89.69
MW-8 10/27/93 0.025 0.017 0.13 0.73 ----3.3 ------98.4 9.08 0.00 89.32
MW-8 01/26/94 0.035 0.001 0.013 0.064 ----1.0 ------98.4 9.26 0.00 89.14
MW-8 04/29/94 0.019 0.021 0.34 1.3 ----7.8 ------98.4 8.30 0.00 90.10
MW-8 07/28/94 0.0083 ND 0.0096 0.045 ----0.95 ------98.4 9.28 0.00 89.12
MW-8 04/21/99 --------------------98.4 8.21 0.00 90.19
MW-8 12/01/07
MW-9 08/01/89 0.53 0.067 0.23 0.72 ----4.3 ------96.88 7.80 0.00 89.08
MW-9 01/26/90 0.39 0.052 ND 0.15 ----1.1 ------96.88 7.97 0.00 88.91
MW-9 11/14/90 0.15 ND 0.124 0.146 ----0.840 ------96.88 8.32 0.00 88.56
MW-9 04/23/91 ND ND ND ND ----0.600 ------96.88 8.08 0.00 88.80
MW-9 07/11/91 0.0054 ND ND ND ----1.09 ------96.88 7.46 0.00 89.42
MW-9 10/01/91 0.169 0.0069 0.0363 0.218 ----0.670 ------96.88 8.14 0.00 88.74
MW-9 01/01/92 0.16 0.0117 0.0328 0.108 ----0.330 ------96.88 7.62 0.00 89.26
MW-9 04/01/92 0.0609 ND 0.0036 0.0185 ----ND ------96.88 7.70 0.00 89.18
MW-9 07/01/92 0.107 ND 0.005 0.0045 ----0.290 ------96.88 7.77 0.00 89.11
MW-9 10/01/92 0.147 ND 0.0062 0.0171 ----0.257 ------96.88 8.06 0.00 88.82
MW-9 01/21/93 0.12 0.007 0.04 0.1 ----0.980 ------96.88 7.63 0.00 89.25
MW-9 04/26/93 0.16 0.037 0.044 0.071 ----0.910 ------96.88 7.00 0.00 89.88
MW-9 DUPLICATE 04/26/93 0.14 0.039 0.041 0.07 ----0.780 ------96.88 ----96.88
MW-9 07/20/93 0.002 ND ND 0.003 ----0.170 ------96.88 7.40 0.00 89.48
MW-9 10/27/93 0.1 0.005 0.005 0.01 ----0.630 ------96.88 7.70 0.00 89.18
MW-9 01/26/94 0.072 ND 0.0009 0.001 ----0.510 ------96.88 7.85 0.00 89.03
MW-9 04/29/94 0.05 0.0016 0.002 0.0043 ----0.330 ------96.88 7.02 0.00 89.86
MW-9 07/28/94 0.065 0.0013 ND 0.0019 ----0.380 ------96.88 7.94 0.00 88.94
MW-9 12/01/07
MW-10 08/01/89 0.51 2.4 0.14 2.3 ----12 ------96.67 7.71 0.00 88.96
MW-10 01/26/90 0.55 1.1 0.15 1.5 ----5.7 ------96.67 7.89 0.00 88.78
MW-10 11/14/90 0.074 ND ND 0.111 ----ND ------96.67 8.14 0.00 88.53
MW-10 04/23/91 0.0435 ND 0.0086 0.0807 ----1.4 ------96.67 7.96 0.00 88.71
MW-10 07/11/91 0.0056 ND ND 0.0352 ----1.78 ------96.67 7.38 0.00 89.29
MW-10 10/01/91 0.0512 0.0091 0.005 0.194 ----0.250 ------96.67 7.99 0.00 88.68
MW-10 01/01/92 0.0779 0.0178 0.0333 0.242 ----0.470 ------96.67 7.50 0.00 89.17
MW-10 04/01/92 0.0386 ND 0.0032 0.165 ----0.600 ------96.67 7.59 0.00 89.08
MW-10 07/01/92 0.0395 ND 0.0264 0.132 ----0.330 ------96.67 7.66 0.00 89.01
MW-10 10/01/92 0.0922 ND 0.0056 0.0943 ----0.365 ------96.67 7.92 0.00 88.75
MW-10 01/21/93 0.081 0.01 0.029 0.17 ----1.2 ------96.67 7.50 0.00 89.17
MW-10 04/26/93 0.11 0.031 0.15 0.68 ----2.9 ------96.67 6.90 0.00 89.77
MW-10 07/20/93 0.14 0.012 0.062 0.63 ----2.3 ------96.67 7.25 0.00 89.42
MW-10 10/27/93 0.065 0.011 0.039 0.32 ----1.8 ------96.67 7.51 0.00 89.16
MW-10 01/26/94 0.06 0.003 0.027 0.14 ----1.3 ------96.67 7.70 0.00 88.97
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
71887 Tables 2SA24 2024_V0 8/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10 Not ApplicableDERR ISL
RBCA Tier 1 SL
MW-10 04/29/94 0.014 0.0057 0.063 0.15 ----2.1 ------96.67 6.85 0.00 89.82
MW-10 07/28/94 0.047 0.0034 0.028 0.22 ----2.1 ------96.67 7.79 0.00 88.88
MW-10 12/01/07
MW-11 08/27/90 6.04 8.93 1.18 8.26 ----79 ------96.67 9.04 0.00 87.63
MW-11 04/23/91 4.42 6.95 0.685 9.81 ----245 ------96.67 9.78 0.00 86.89
MW-11 07/11/91 1.34 2.70 0.399 3.8 ----81.5 ------96.67 8.73 0.00 87.94
MW-11 01/01/92 3.56 6.25 1.29 7.43 ----39.2 ------96.67 9.08 0.00 87.59
MW-11 07/01/92 2.48 5.70 1.56 8.18 ----59.3 ------96.67 9.13 0.00 87.54
MW-11 04/26/93 2.80 8.60 1.6 9.90 ----43 ------96.67 8.30 0.00 88.37
MW-11 07/20/93 1.60 6.20 1.7 12 ----58 ------96.67 8.65 0.00 88.02
MW-11 10/27/93 1.80 6.20 1.5 9.1 ----42 ------96.67 9.20 0.00 87.47
MW-11 01/26/94 2.60 9.00 3.4 22 ----130 ------96.67 9.38 0.00 87.29
MW-11 04/29/94 1.40 6.30 3.0 19 ----180 ------96.67 8.16 0.00 88.51
MW-11 07/28/94 1.20 3.10 0.96 7.3 ----40 ------96.67 9.44 0.00 87.23
MW-11 12/13/07 0.001 0.03 0.033 0.12 0.006 <0.0005 --4.4 --18 96.67 9.95 0.00 86.72
MW-11 06/03/08 <0.0005 0.002 0.042 0.068 0.005 <0.0005 --4 11 --96.67 9.90 0.00 86.77
MW-11 12/01/08 0.009 0.011 0.039 0.11 0.01 <0.0005 --5.4 26 --96.67 11.41 0.00 85.26
MW-11 06/01/09 0.0008 0.0006 0.016 0.025 0.003 <0.0005 --2.8 22 --96.67 10.54 0.00 86.13
MW-11 11/30/09 0.18 0.037 0.068 0.087 0.008 <0.0005 --7.6 27 --96.67 12.06 0.00 84.61
MW-11 06/03/10 0.066 0.052 0.034 0.096 0.011 <0.0005 --1.8 --19 96.67 10.60 0.00 86.07
MW-11 03/14/11 <0.0005 0.0006 0.004 0.014 0.003 <0.0005 --0.340 --4.8 96.67 9.35 0.00 87.32
MW-11 09/14/11 0.0007 <0.0005 0.006 0.002 0.001 <0.0005 --0.310 --2.2 96.67 10.68 0.00 85.99
MW-11 03/14/12 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.130 --7.8 99.08 13.05 0.00 86.03 Surveyed 11/11
MW-11 09/11/12 0.002 0.0005 0.001 0.0008 <0.001 <0.0005 --0.110 --1.4 99.08 13.45 0.00 85.63
MW-11 03/12/13 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.034 --1.4 99.08 14.10 0.00 84.98
MW-11 09/19/13 0.0009 0.003 0.003 0.009 0.002 <0.0005 --0.150 --0.670 99.08 12.10 0.00 86.98
MW-11 04/07/14 <0.0005 <0.0005 <0.0005 0.0006 <0.001 <0.0005 --<0.022 --0.066 99.08 12.38 0.00 86.70
MW-11 07/21/14 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --0.440 99.08 7.51 0.00 91.57
MW-11 09/09/15 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --1.2 99.08 7.85 0.00 91.23
MW-11 05/01/17 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --<0.045 99.08 9.36 0.00 89.72
MW-11 09/06/17 0.001 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --0.031 --<0.045 99.08 11.35 0.00 87.73
MW-11 04/06/21 99.08 12.50 0.00 86.58
MW-11 09/14/21 0.00217 0.000736 J 0.00208 0.00249 J 0.00157 J <0.000101 --0.727 0.334 --99.08 11.80 0.00 87.28
MW-11 03/30/22 <0.0000941 <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --<0.0314 0.188 --99.08 11.58 0.00 87.50
MW-11 06/09/22 99.08 11.47 0.00 87.61
MW-11 08/10/22 0.000206 J <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --<0.0314 0.701 --99.08 11.77 0.00 87.31
MW-11 05/16/23 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --<0.0314 <0.0247 <0.0247 99.08 8.69 0.00 90.39
MW-11 08/08/23 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --<0.0314 0.192 B 0.0538 B J 99.08 10.94 0.00 88.14
MW-11 04/15/24 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.0481 B J 0.0910 J <0.0247 99.08 8.11 0.00 90.97
MW-11 DUPLICATE 04/15/24 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.0334 B J 0.0690 J <0.0247 99.08 8.11 0.00 90.97
MW-11 09/04/24 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 C3 <0.000101 --0.0588 B J 0.179 0.0591 B J 99.08 11.29 0.00 87.79
MW-11 DUPLICATE 09/04/24 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.0653 B J 0.195 0.254 B 99.08 11.29 0.00 87.79
MW-12 08/27/90 1.918 0.659 1.28 12 ----85 --------------
MW-12 11/14/90 1.06 ND 0.354 1.34 ----7.28 ------98.95 8.20 0.00 90.75
MW-12 04/23/91 0.423 0.0166 ND 1.64 ----19.6 ------98.95 9.60 0.00 89.35
MW-12 07/11/91 0.565 0.245 0.374 1.76 ----33.4 ------98.95 8.82 0.00 90.13
MW-12 10/01/91 0.57 0.0337 ND 1.70 ----12.6 ------98.95 9.65 0.00 89.30
MW-12 01/01/92 0.789 0.188 0.593 1.66 ----17.6 ------98.95 8.96 0.00 89.99
MW-12 04/01/92 0.334 0.0107 ND 0.698 ----6.2 ------98.95 9.12 0.00 89.83
MW-12 07/01/92 0.335 0.0346 0.219 0.901 ----4.05 ------98.95 9.18 0.00 89.77
MW-12 10/01/92 0.375 ND ND 0.241 ----2.18 ------98.95 9.60 0.00 89.35
MW-12 04/26/93 0.54 0.046 0.066 0.3 ----3 ------98.95 8.30 0.00 90.65
MW-12 07/20/93 2.1 0.3 0.29 1.2 ----8 ------98.95 8.68 0.00 90.27
MW-12 10/27/93 0.34 0.13 0.45 1.7 ----12 ------98.95 9.16 0.00 89.79
MW-12 01/26/94 0.37 0.032 0.23 0.88 ----6.4 ------98.95 9.39 0.00 89.56
ONLY NATURAL ATTENUATION SAMPLES
ONLY NATURAL ATTENUATION SAMPLES
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
71887 Tables 2SA24 2024_V0 9/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10 Not ApplicableDERR ISL
RBCA Tier 1 SL
MW-12 04/29/94 0.092 0.0081 0.11 0.17 ----3.9 ------98.95 8.22 0.00 90.73
MW-12 07/28/94 0.23 0.0097 0.14 0.17 ----5 ------98.95 9.39 0.00 89.56
MW-12 06/01/09
MW-12 11/30/09
MW-12 06/03/10
MW-12 03/14/11
MW-12 09/14/11
MW-12 03/14/12
MW-12 09/11/12 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.022 <0.050 --98.95 13.57 0.00 85.38
MW-12 03/12/13
MW-12 09/19/13 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --0.11 98.95 12.25 0.00 86.70
MW-12 04/07/14 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --0.12 98.95 12.70 0.00 86.25
MW-12 07/21/14 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --0.38 98.95 11.43 0.00 87.52
MW-12 09/09/15 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 --<0.022 --0.16 98.95 11.45 0.00 87.50
MW-12 03/30/22
MW-13 08/27/90 ND ND ND ND ----ND --------------
MW-13 11/14/90 ND ND ND ND ----ND ------97.94 9.05 0.00 88.89
MW-13 04/23/91 ND ND ND ND ----ND ------97.94 8.78 0.00 89.16
MW-13 07/11/91 ND ND ND ND ----ND ------97.94 9.20 0.00 88.74
MW-13 10/01/91 ND ND ND ND ----ND ------97.94 8.83 0.00 89.11
MW-13 04/01/92 ND ND ND ND ----ND ------97.94 8.31 0.00 89.63
MW-13 10/01/92 ND ND ND ND ----ND ------97.94 8.75 0.00 89.19
MW-13 01/21/93 --------------------97.94 8.35 0.00 89.59
MW-13 04/26/93 ND ND ND ND ----ND ------97.94 7.50 0.00 90.44
MW-13 07/20/93 --------------------97.94 7.92 0.00 90.02
MW-13 10/27/93 ND ND ND ND ----ND ------97.94 8.38 0.00 89.56
MW-13 01/26/94 --------------------97.94 8.48 0.00 89.46
MW-13 04/29/94 ND ND ND ND ----ND ------97.94 7.49 0.00 90.45
MW-13 07/28/94 --------------------97.94 8.61 0.00 89.33
MW-13 12/01/07
MW-14 08/27/90 0.325 0.25 0.444 2.06 ----12.3 --------------
MW-14 11/14/90 0.658 ND 0.304 1.84 ----5.79 ------98.58 9.46 0.00 89.12
MW-14 04/23/91 0.0082 0.0202 ND 0.331 ----3.81 ------98.58 9.14 0.00 89.44
MW-14 07/11/91 0.0081 0.0839 ND 0.763 ----3.61 ------98.58 8.26 0.00 90.32
MW-14 10/01/91 0.0089 0.0865 0.0927 1.43 ----2.47 --------------
MW-14 01/01/92 ND 0.208 0.422 2.49 ----5.53 ------98.58 8.54 0.00 90.04
MW-14 04/01/92 0.0026 0.0916 0.0736 0.831 ----6.98 ------98.58 8.61 0.00 89.97
MW-14 07/01/92 0.005 0.106 0.3 1.54 ----4.99 ------98.58 8.69 0.00 89.89
MW-14 10/01/92 0.028 ND ND 1.47 ----6.03 ------98.58 9.07 0.00 89.51
MW-14 01/21/93 0.096 0.057 0.21 1.0 ----5.1 ------98.58 8.68 0.00 89.90
MW-14 04/26/93 ND 0.034 0.098 0.46 ----2.1 ------98.58 7.77 0.00 90.81
MW-14 07/20/93 0.026 0.026 0.12 6.11 ----3.3 ------98.58 8.18 0.00 90.40
MW-14 10/27/93 0.003 0.025 0.092 0.44 ----2.5 ------98.58 8.72 0.00 89.86
MW-14 01/26/94 ND 0.034 0.12 0.86 ----5.4 ------98.58 8.82 0.00 89.76
MW-14 04/29/94 0.016 0.026 0.07 0.33 ----2.2 ------98.58 7.68 0.00 90.90
MW-14 07/28/94 0.039 0.02 0.14 0.81 ----5.2 ------98.58 8.92 0.00 89.66
MW-14 12/01/07
MW-15 08/27/90 ND ND ND ND ----ND --------------
MW-15 11/14/90 ND ND ND ND ----ND ------99.89 10.43 0.00 89.46
MW-15 04/23/91 ND ND ND ND ----ND ------99.89 9.91 0.00 89.98
MW-15 10/01/91 ND ND ND ND ----ND ------99.89 10.00 0.00 89.89
MW-15 04/01/92 ND ND ND ND ----ND ------99.89 9.31 0.00 90.58
MW-15 10/01/92 ND ND ND ND ----ND ------99.89 9.82 0.00 90.07
MW-15 01/21/93 --------------------99.89 9.41 0.00 90.48
MW-15 04/26/93 ND ND ND ND ----ND ------99.89 8.40 0.00 91.49
INACCESSIBLE
UNABLE TO LOCATE
UNABLE TO LOCATE
DRY
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
UNABLE TO LOCATE
UNABLE TO LOCATE
UNABLE TO LOCATE
UNABLE TO LOCATE
71887 Tables 2SA24 2024_V0 10/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10 Not ApplicableDERR ISL
RBCA Tier 1 SL
MW-15 04/26/93 ND ND ND ND ----ND ------99.89 8.40 0.00 91.49
MW-15 07/20/93 --------------------99.89 8.78 0.00 91.11
MW-15 10/27/93 ND ND ND ND ----ND ------99.89 9.40 0.00 90.49
MW-15 01/26/94 --------------------99.89 9.59 0.00 90.30
MW-15 04/29/94 ND ND ND ND ----ND ------99.89 8.30 0.00 91.59
MW-15 07/28/94 --------------------99.89 9.66 0.00 90.23
MW-15 12/01/07
MW-16 11/14/90 ND ND ND ND ----ND --------------
MW-16 04/23/91 ND ND ND ND ----ND ------95.67 7.54 0.00 88.13
MW-16 10/01/91 0.0011 ND ND ND ----ND --------------
MW-16 04/01/92 0.0162 ND ND ND ----ND ------95.67 7.21 0.00 88.46
MW-16 07/01/92 0.0252 ND ND ND ----ND ------95.67 7.21 0.00 88.46
MW-16 10/01/92 0.027 ND ND ND ----0.236 ------95.67 7.41 0.00 88.26
MW-16 01/21/93 --------------------95.67 7.12 0.00 88.55
MW-16 04/26/93 0.032 0.002 ND 0.002 ----0.26 ------95.67 7.45 0.00 88.22
MW-16 07/22/93 --------------------95.67 6.94 0.00 88.73
MW-16 10/27/93 0.017 0.0007 ND ND ----0.18 ------95.67 7.14 0.00 88.53
MW-16 01/26/94 --------------------95.67 7.30 0.00 88.37
MW-16 04/29/94 0.0015 ND ND ND ----0.06 ------95.67 6.71 0.00 88.96
MW-16 07/28/94 --------------------95.67 7.35 0.00 88.32
MW-16 12/01/07
MW-17 11/29/90 ND ND ND ND ----ND --------------
MW-17 04/23/91 0.0087 ND ND 0.0072 ----ND ------95.82 7.59 0.00 88.23
MW-17 07/11/92 0.0214 ND ND ND ----ND ------95.82 7.20 0.00 88.62
MW-17 10/01/91 0.0182 ND ND ND ----ND --------------
MW-17 01/01/92 0.054 ND ND ND ----ND ------95.82 7.12 0.00 88.70
MW-17 04/01/92 0.0354 ND ND ND ----ND ------95.82 7.27 0.00 88.55
MW-17 07/01/92 0.0281 ND ND ND ----ND ------95.82 7.25 0.00 88.57
MW-17 10/01/92 0.0182 ND ND ND ----0.29 ------95.82 7.44 0.00 88.38
MW-17 01/21/93 0.034 0.9 ND 0.001 ----0.73 ------95.82 7.12 0.00 88.70
MW-17 04/26/93 0.042 0.002 0.0005 0.002 ----0.39 ------95.82 6.81 0.00 89.01
MW-17 07/22/93 0.085 0.008 0.014 0.016 ----0.55 ------95.82 7.00 0.00 88.82
MW-17 10/27/93 0.024 0.002 0.001 0.001 ----0.46 ------95.82 7.18 0.00 88.64
MW-17 01/26/94 0.062 ND ND 0.0008 ----0.67 ------95.82 7.36 0.00 88.46
MW-17 04/29/94 0.055 ND ND 0.0011 ----0.60 ------95.82 6.78 0.00 89.04
MW-17 07/28/94 0.012 0.001 ND ND ----0.31 ------95.82 7.34 0.00 88.48
MW-17 12/01/07
MW-18 11/29/90 ND ND ND ND ----ND --------------
MW-18 04/23/91 0.0087 ND ND 0.0095 ----ND ------96.01 7.75 0.00 88.26
MW-18 07/11/92 ND ND ND ND ----ND ------96.01 7.32 0.00 88.69
MW-18 10/01/91 ND ND ND ND ----ND ------96.01 ----96.01
MW-18 01/01/92 0.0123 ND ND ND ----ND ------96.01 7.31 0.00 88.70
MW-18 04/01/92 ND ND ND ND ----ND ------96.01 7.43 0.00 88.58
MW-18 07/01/92 ND ND ND ND ----ND ------96.01 7.42 0.00 88.59
MW-18 10/01/92 0.0013 ND ND ND ----ND ------96.01 7.61 0.00 88.40
MW-18 01/21/93 0.001 ND ND ND ----0.052 ------96.01 7.30 0.00 88.71
MW-18 04/26/93 0.008 0.003 0.0005 0.002 ----0.071 ------96.01 6.90 0.00 89.11
MW-18 07/22/93 ND ND ND ND ----ND ------96.01 7.16 0.00 88.85
MW-18 10/27/93 ND 0.0005 ND ND ----ND ------96.01 7.34 0.00 88.67
MW-18 01/26/94 0.003 ND ND ND ----0.080 ------96.01 7.50 0.00 88.51
MW-18 04/29/94 ND ND ND ND ----ND ------96.01 6.87 0.00 89.14
MW-18 07/28/94 ND ND ND ND ----ND ------96.01 7.50 0.00 88.51
MW-18 12/01/07
MW-19 11/29/90 ND ND ND ND ----ND --------------
MW-19 04/23/91 ND ND ND ND ----ND ------96.82 8.26 0.00 88.56
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
71887 Tables 2SA24 2024_V0 11/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10 Not ApplicableDERR ISL
RBCA Tier 1 SL
MW-19 10/01/91 ND ND ND ND ----ND ------96.82 8.30 0.00 88.52
MW-19 04/01/92 ND ND ND ND ----ND ------96.82 7.86 0.00 88.96
MW-19 10/01/92 ND ND ND ND ----ND ------96.82 8.24 0.00 88.58
MW-19 05/26/93 0.012 ND ND ND ----ND ------96.82 7.15 0.00 89.67
MW-19 07/20/93 --------------------96.82 7.55 0.00 89.27
MW-19 10/27/93 ND ND ND ND ----ND ------96.82 7.89 0.00 88.93
MW-19 01/26/93 --------------------96.82 7.99 0.00 88.83
MW-19 04/29/94 ND ND ND ND ----ND ------96.82 7.18 0.00 89.64
MW-19 07/28/94 --------------------96.82 8.14 0.00 88.68
MW-19 12/01/07
MW-20 11/29/90 ND ND ND ND ----ND --------------
MW-20 04/23/91 ND ND ND ND ----ND ------95.69 7.18 0.00 88.51
MW-20 10/01/91 ND ND ND ND ----ND ------95.69 7.19 0.00 88.50
MW-20 04/01/92 ND ND ND ND ----ND ------95.69 6.78 0.00 88.91
MW-20 10/01/92 ND ND 0.0014 ND ----ND ------95.69 7.12 0.00 88.57
MW-20 10/11/94 ND ND ND ND ----ND ------95.69 6.94 0.00 88.75
MW-20 07/25/95
MW-21 08/20/02 0.012 0.0012 0.0024 <0.005 <0.005 <0.0025 1.2 ------97.59 8.09 0.00 89.50
MW-21 11/05/02 0.006 0.00053 0.0014 <0.005 0.0051 <0.0025 0.67 ------97.59 8.47 0.00 89.12
MW-21 03/19/03 0.00092 <0.002 0.0016 <0.005 0.0028 <0.0025 0.54 ------97.59 8.37 0.00 89.22
MW-21 06/17/03 0.002 ND ND ND ND ND 0.54 ------97.59 8.00 0.00 89.59
MW-21 09/30/03 <0.0005 <0.0005 <0.0005 <0.005 <0.001 <0.0005 0.12 ------97.59 8.29 0.00 89.30
MW-21 11/25/03 <0.0005 <0.0005 <0.0005 <0.005 <0.001 <0.0005 0.11 ------97.59 8.37 0.00 89.22
MW-21 12/01/07
MW-22 08/20/02 0.059 0.0041 0.0016 0.018 0.0044 <0.0025 0.35 ------96.98 7.62 0.00 89.36
MW-22 11/05/02 0.0071 <0.0005 <0.0005 <0.0015 <0.001 <0.0025 0.095 ------96.98 7.94 0.00 89.04
MW-22 03/19/03 <0.0005 <0.0005 <0.0005 <0.0015 <0.001 <0.0025 <0.050 ------96.98 7.82 0.00 89.16
MW-22 06/17/03 ND ND ND ND ND ND ND ------96.98 7.45 0.00 89.53
MW-22 09/30/03 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.050 ------96.98 7.76 0.00 89.22
MW-22 11/25/03 <0.0005 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.050 ------96.98 7.83 0.00 89.15
MW-22 12/01/07
MW-23 01/12/17 0.004 <0.003 0.01 0.02 0.11 <0.003 --5.3 --2.2 98.39 11.70 0.00 86.69
MW-23 05/01/17 0.14 0.012 0.022 0.092 0.17 <0.003 --8.3 --7.9 98.39 10.02 0.00 88.37
MW-23 09/07/17 0.17 0.01 0.008 0.087 0.15 <0.003 --8.9 --3.6 98.39 11.43 0.00 86.96
MW-23 12/12/19 0.140 J*0.007 0.009 0.065 0.19 <0.001 --5.3 --0.57 98.39 11.48 0.00 86.91
MW-23 04/06/21 98.39 12.29 0.00 86.10
MW-23 06/17/21
MW-23 09/14/21 0.172 0.00843 0.00666 0.0643 0.114 <0.000101 --1.44 5.65 --99.01 11.68 0.00 87.33
MW-23 12/28/21 0.0322 0.00365 0.00605 0.0376 0.160 <0.000101 --7.49 3.13 --99.01 12.13 0.00 86.88
MW-23 03/30/22 0.0491 0.00659 0.00974 0.0463 0.0869 <0.000101 --4.80 4.66 --99.01 11.45 0.00 87.56
MW-23 DUPLICATE 03/30/22 0.0471 0.00634 0.00961 0.0440 0.0858 <0.000101 --4.28 4.47 --99.01 11.45 0.00 87.56
MW-23 06/09/22 0.0947 0.00642 0.00644 0.0454 0.104 <0.000101 --5.97 1.58 --99.01 11.42 0.00 87.59
MW-23 DUPLICATE 06/09/22 0.0926 0.00656 0.00669 0.0464 0.108 <0.000101 --5.49 1.75 --99.01 11.42 0.00 87.59
MW-23 08/11/22 0.125 0.00478 0.00375 0.0250 0.0248 <0.000101 --3.11 0.749 --99.01 11.69 0.00 87.32
MW-23 05/17/23 0.0420 0.00528 0.00676 0.0502 0.117 E <0.000101 --3.51 0.930 0.521 99.01 9.35 0.00 89.66
MW-23 08/09/23 0.0270 0.00357 0.00700 0.0517 0.107 <0.000101 --3.27 1.410 1.44 99.01 11.01 0.00 88.00
MW-23 04/16/24 0.00530 0.000586 J 0.000813 J 0.00425 0.00732 <0.000101 --0.456 0.249 B 0.0748 J 99.01 9.31 0.00 89.70
MW-23 09/04/24 0.0262 0.00221 0.00260 0.0186 0.0426 <0.000101 --3.36 0.899 0.624 B 99.01 11.23 0.00 87.78
MW-24 01/12/17 0.003 0.001 0.002 0.004 0.014 <0.0005 --0.31 --0.056 99.01 12.25 0.00 86.76
MW-24 05/01/17 0.01 0.008 0.028 0.035 0.041 <0.0005 --3.6 --0.26 99.01 10.48 0.00 88.53
MW-24 09/07/17 0.01 0.004 0.007 0.015 0.032 <0.0005 --2.6 --0.3 99.01 11.93 0.00 87.08
MW-24 12/12/19 0.017 J*0.007 0.004 J 0.016 J 0.057 <0.001 --3.5 --0.56 99.01 12.02 0.00 86.99
MW-24 04/06/21 99.01 12.85 0.00 86.16
MW-24 06/17/21
MW-24 09/14/21 0.0145 0.00661 0.00434 0.0129 0.0846 <0.000101 --1.35 3.35 --99.01 12.21 0.00 86.80
ONLY NATURAL ATTENUATION SAMPLES
ONLY NATURAL ATTENUATION SAMPLES
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
PERMEABLE FILLED BORINGS WITH SULFATE ADDED CROSSGRADIENT AND DOWNGRADIENT
PERMEABLE FILLED BORINGS WITH SULFATE ADDED CROSSGRADIENT AND DOWNGRADIENT
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
WELL WAS DESTROYED DURING DEMOLITION ACTIVITIES BY THE OFFSITE PROPERTY OWNERS
71887 Tables 2SA24 2024_V0 12/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE Total TPH TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE Notes
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 --1 1 1
0.300 3.0 4 10 0.700 0.200 --10 10 10 Not ApplicableDERR ISL
RBCA Tier 1 SL
MW-24 12/28/21 0.0138 0.00414 0.00194 0.00588 0.019 <0.000101 --1.13 1.76 --99.01 12.68 0.00 86.33
MW-24 03/30/22 0.0109 0.00386 0.00221 0.00599 0.051 <0.000101 --1.90 1.08 --99.01 12.52 0.00 86.49
MW-24 06/09/22 0.0119 0.00348 0.00262 0.00698 0.0543 <0.000101 --2.73 1.23 --99.01 11.95 0.00 87.06
MW-24 08/11/22 0.0216 0.00563 0.00503 0.00833 0.0522 <0.000101 --2.88 1.32 --99.01 12.22 0.00 86.79
MW-24 05/17/23 0.00955 0.00343 0.00542 0.00536 0.0609 <0.000101 --1.12 1.20 0.345 99.01 9.87 0.00 89.14
MW-24 08/09/23 0.0133 0.00593 0.01270 0.01290 0.0395 <0.000101 --2.04 2.66 2.14 99.01 11.53 0.00 87.48
MW-24 04/16/24 0.00785 0.00282 0.00253 0.00446 0.0205 <0.000101 --0.957 0.883 0.308 99.01 9.94 0.00 89.07
MW-24 09/04/24 0.0173 0.00225 0.00311 0.00517 0.0130 <0.000101 --2.31 1.49 0.593 B 99.01 11.78 0.00 87.23
MW-25 01/12/17 0.01 0.0006 0.0006 0.004 0.007 <0.0005 --0.71 --0.085 97.56 10.90 0.00 86.66
MW-25 05/01/17 0.037 0.005 0.017 0.041 0.018 <0.0005 --2.4 --0.17 97.56 9.22 0.00 88.34
MW-25 09/07/17 0.018 0.002 0.001 0.014 0.008 <0.0005 --0.990 --0.06 97.56 10.62 0.00 86.94
MW-25 12/12/19 0.004 J <0.0002 <0.0004 <0.001 <0.001 <0.0002 --0.200 --<0.052 97.56 10.68 0.00 86.88
MW-25 04/06/21 97.56 11.49 0.00 86.07
MW-25 09/14/21 0.000138 J <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --0.0314 J <0.112 --97.56 10.86 0.00 86.70
MW-25 03/31/22 <0.0000941 <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --0.106 B 0.11 --97.56 11.30 0.00 86.26
MW-25 06/09/22 97.56 10.64 0.00 86.92
MW-25 08/11/22 <0.0000941 <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --0.107 0.0696 J --97.56 10.88 0.00 86.68
MW-25 05/17/23 0.0128 0.000624 J 0.00152 0.00522 0.00777 <0.000101 --0.608 0.147 0.504 97.56 8.60 0.00 88.96
MW-25 08/09/23 0.00307 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.285 0.505 0.0912 B J 97.56 10.22 0.00 87.34
MW-25 04/16/24 0.00384 <0.000278 0.000188 J <0.000174 <0.00100 <0.000101 --0.264 B 0.176 0.0333 J 97.56 8.68 0.00 88.88
MW-25 09/04/24 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 C3 <0.000101 --0.246 B 0.205 0.0567 B J 97.56 10.45 0.00 87.11
MW-26 12/12/19 <0.0002 <0.0002 <0.0004 <0.001 <0.001 <0.0002 --0.87 --<0.046 --10.63 0.00 --
MW-26 04/06/21 --11.46 0.00 --
MW-26 09/14/21 <0.0000941 <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --0.0249 J <0.0314 ----10.85 0.00 --
MW-26 03/31/22 <0.0000941 <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --<0.0314 0.0993 J ----10.70 0.00 --
MW-26 06/09/22 --10.56 0.00 --
MW-26 08/10/22 <0.0000941 <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --<0.0314 0.148 ----10.84 0.00 --
MW-26 05/16/23 0.00210 <0.000278 <0.000137 <0.000174 0.00195 J <0.000101 --<0.0314 0.0516 J 0.0516 J --8.57 0.00 --
MW-26 08/09/23 0.00493 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.14 0.312 B 0.0659 B J --10.17 0.00 --
MW-26 04/16/24 0.00269 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.123 B 0.150 B <0.0247 --8.66 0.00 --
MW-26 09/04/24 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 C3 <0.000101 --0.110 B 0.144 0.0621 B J --10.36 0.00 --
MW-27 12/12/19 <0.0002 <0.0002 <0.0004 <0.001 <0.001 <0.0002 --0.14 --<0.046 --11.82 0.00 --`
MW-27 04/06/21 --12.60 0.00 --
MW-27 DUPLICATE 04/06/21 --12.60 0.00 --
MW-27 09/14/21 <0.0000941 <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --0.0763 J <0.0314 ----11.96 0.00 --
MW-27 03/31/22 <0.0000941 <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --<0.0314 0.0798 J ----11.75 0.00 --
MW-27 06/09/22 --11.76 0.00 --
MW-27 08/11/22 <0.0000941 <0.000278 <0.000137 <0.000174 <0.001 <0.000101 --<0.0314 0.0366 J ----12.04 0.00 --
MW-27 05/16/23 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --<0.0314 <0.0247 <0.0247 --9.71 0.00 --
MW-27 08/09/23 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --<0.0314 0.0677 B J 0.0670 B J --11.35 0.00 --
MW-27 04/16/24 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.0368 B J <0.0247 <0.0247 --9.80 0.00 --
MW-27 09/04/24 <0.0000941 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 --0.0461 B J 0.0604 J 0.0604 J --11.58 0.00 --
ONLY NATURAL ATTENUATION SAMPLES
ONLY NATURAL ATTENUATION SAMPLES
ONLY NATURAL ATTENUATION SAMPLES
ONLY NATURAL ATTENUATION SAMPLES
ONLY NATURAL ATTENUATION SAMPLES
ONLY NATURAL ATTENUATION SAMPLES
ONLY NATURAL ATTENUATION SAMPLES
71887 Tables 2SA24 2024_V0 13/14
Table 1
Current and Historical Groundwater Gauging and Analytical Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Notes:
1. Feet above reference benchmark
Total TPH = total petroleum hydrocarbons by Method USEPA 8015/610 Modified.
TPH-GRO = total petroleum hydrocarbons - gasoline range organics analyzed by USEPA Method 8015B Modified.
TPH-DRO = total petroleum hydrocarbons - diesel range organics analyzed by USEPA Method 8015B.
Benzene, toluene, ethylbenzene, total xylenes, naphthalene, and MTBE analyzed by USEPA Method 624, 8020, after 12/99 8021 B, and as of 6/17/03 8260B.
Acronyms and Abbreviations:
Bold = Result exceeds DERR ISL.
Shaded cell result exceed RBCA Tier 1 SL.
* = erroneous field reading
< = not detected at concentrations at or above the method detection limit. The method detection limit is listed in the analytical report.
-- = Not Applicable
btoc = below top of casing
DERR = Division of Environmental Response and Remediation
DERR ISL = DERR Initial Screening Level
DTW = depth to water
GWE = groundwater elev ation, based on site benchmark corrected for product if present, using a specific gravity of 0.75
mg/L = milligram per liter
MTBE = methyl tertiary butyl ether
ND = not detected at concentrations at or above the method detection limit. The method detection limit is listed in the analytical report.
RBCA = Risk-Based Corrective Action
TOC = top of casing (assumed benchmark)
Qualifiers:
J = Estimated value. Result is above or equal to the Method Detection Limit (MDL or DL) and below the Limit of Quantitation (LOQ or RL)
J* = Drift continuing calibration criteria of 20 percent exceeded for benzene for some samples. Result is estimated.
B = The same analyte is found in the associated blank.
E = The analyte concentration exceeds the upper limit of the calibration range of the instrument established by the initial calibration (ICAL).
RBCA Tier 1 SL = RBCA Tier 1 Screening Level. Only applicable when 1. No buildings, property boundaries or utility lines within 30 feet of the highest measured concentration of any contaminant that is
greater than the ISL but less than or equal to the Tier 1 SL, and, no water wells or surface water within 500 feet of highest measured concentration of any contaminant that is greater than the ISL but less
than or equal to the Tier 1 SL.
71887 Tables 2SA24 2024_V0 14/14
Table 2
Post Remediation Groundwater Gauging and Analytical Results - Select Wells
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 1 1 1
0.300 3.0 4 10 0.700 0.200 10 10 10
MW-4 12/12/19 0.007 J*0.0009 J <0.0004 0.005 J 0.003 J <0.0002 0.910 --1.2 98.20 11.15 0.00 87.05
MW-4 09/13/21 0.00761 0.00179 0.000787 J 0.00705 0.00185 J <0.000101 8.35 1.38 --98.20 11.40 0.00 86.80
MW-4 03/31/22 0.00432 0.000305 J <0.000137 0.00126 J <0.001 <0.000101 1.11 12.2 --98.20 11.29 0.00 86.91
MW-4 08/10/22 0.016 0.00168 0.000464 J 0.00369 0.00170 B J <0.000101 2.11 24.1 --98.20 11.39 0.01*86.81
MW-4 05/16/23 0.00127 0.000280 J <0.000137 0.000786 J <0.00100 <0.000101 0.601 0.415 <0.0247 98.20 8.96 0.00 89.24
MW-4 08/09/23 0.00450 0.000835 J 0.000948 J 0.004420 0.010 <0.000101 0.931 2.010 0.43 98.20 10.00 0.00 88.20
MW-4 04/16/24 0.000920 J 0.000307 J 0.000201 J 0.00134 J 0.00127 J <0.000101 0.776 0.995 <0.0247 98.20 9.00 0.00 89.20
MW-4 09/04/24 0.00411 0.00158 0.000665 J 0.00368 0.00111 J <0.000101 0.798 B 2.76 0.315 B 98.20 10.94 0.00 87.26
MW-6 12/12/19 1.2 J*0.017 0.015 0.020 J 0.018 J <0.002 3.4 --0.110 J 99.75 12.71 0.00 87.04
MW-6 DUP 12/12/19 1.2 J*0.016 0.016 0.016 J 0.017 J <0.002 3.2 --0.110 99.75 12.71 0.00 87.04
MW-6 09/13/21 0.168 0.00185 0.00164 0.00381 0.00148 J <0.000101 0.802 0.807 --99.75 12.95 0.00 86.80
MW-6 DUP 09/13/21 0.167 0.00165 0.00159 0.00371 0.0016 J <0.000101 0.780 0.838 --99.75 12.95 0.00 86.80
MW-6 12/28/21 0.0641 0.000774 J 0.000247 J 0.00145 J <0.001 <0.000101 0.315 0.246 --99.75 13.45 0.00 86.30
MW-6 DUP 12/28/21 0.064 0.000794 J 0.000242 J 0.0015 J <0.001 <0.000101 0.359 0.270 --99.75 13.45 0.00 86.30
MW-6 03/31/22 0.0365 0.000574 J <0.000137 0.000847 J <0.001 <0.000101 0.163 B 0.241 --99.75 13.31 0.00 86.44
MW-6 06/08/22 0.0411 0.000403 J 0.000144 J 0.000829 J <0.001 <0.000101 0.300 0.196 --99.75 12.65 0.00 87.10
MW-6 08/10/22 0.0176 <0.00278 <0.00137 <0.00174 <0.010 <0.00101 0.0964 B J 0.336 --99.75 12.96 0.01*86.79
MW-6 05/16/23 0.184 0.0213 <0.000137 0.0639 <0.00100 <0.000101 0.101 0.0992 J 0.0990 J 99.75 10.55 0.00 89.20
MW-6 08/09/23 0.185 <0.00278 <0.00137 <0.00174 <0.0100 <0.00101 0.699 0.645 0.232 B 99.75 12.25 0.00 87.50
MW-6 04/16/24 0.0388 0.000417 J 0.000143 J 0.000638 J <0.00100 <0.000101 0.170 B 0.223 B <0.0247 99.75 10.59 0.00 89.16
MW-6 DUP 04/16/24 0.0273 <0.000278 <0.000137 <0.000174 <0.00100 <0.000101 0.142 B 0.216 B <0.0247 99.75 10.59 0.00 89.16
MW-6 09/04/24 0.184 0.00217 0.000437 J 0.00359 0.00179 J <0.000101 1.09 0.601 0.388 B 99.75 12.48 0.00 87.27
MW-6 DUP 09/04/24 0.170 0.00197 0.000375 J 0.00331 0.00153 J <0.000101 1.01 0.589 0.378 B 99.75 12.48 0.00 87.27
MW-23 12/12/19 0.140 J*0.007 0.009 0.065 0.19 <0.001 5.3 --0.57 98.39 11.48 0.00 86.91
MW-23 09/14/21 0.172 0.00843 0.00666 0.0643 0.114 <0.000101 1.44 5.65 --99.01 11.68 0.00 87.33
MW-23 12/28/21 0.0322 0.00365 0.00605 0.0376 0.160 <0.000101 7.49 3.13 --99.01 12.13 0.00 86.88
MW-23 03/30/22 0.0491 0.00659 0.00974 0.0463 0.0869 <0.000101 4.80 4.66 --99.01 11.45 0.00 87.56
MW-23 DUP 03/30/22 0.0471 0.00634 0.00961 0.0440 0.0858 <0.000101 4.28 4.47 --99.01 11.45 0.00 87.56
MW-23 06/09/22 0.0947 0.00642 0.00644 0.0454 0.104 <0.000101 5.97 1.58 --99.01 11.42 0.00 87.59
MW-23 DUP 06/09/22 0.0926 0.00656 0.00669 0.0464 0.108 <0.000101 5.49 1.75 --99.01 11.42 0.00 87.59
MW-23 08/11/22 0.125 0.00478 0.00375 0.0250 0.0248 <0.000101 3.11 0.749 --99.01 11.69 0.00 87.32
MW-23 05/16/23 0.0420 0.00528 0.00676 0.0502 0.117 E <0.000101 3.51 0.930 0.521 99.01 9.35 0.00 89.66
MW-23 08/09/23 0.0270 0.00357 0.00700 0.0517 0.107 <0.000101 3.27 1.410 1.44 99.01 11.01 0.00 88.00
MW-23 04/16/24 0.00530 0.000586 J 0.000813 J 0.00425 0.00732 <0.000101 0.456 0.249 B 0.0748 J 99.01 9.31 0.00 89.70
MW-23 09/04/24 0.0262 0.00221 0.00260 0.0186 0.0426 <0.000101 3.36 0.899 0.624 B 99.01 11.23 0.00 87.78
MW-24 12/12/19 0.017 J*0.007 0.004 J 0.016 J 0.057 <0.001 3.5 --0.56 99.01 12.02 0.00 86.99
MW-24 09/14/21 0.0145 0.00661 0.00434 0.0129 0.0846 <0.000101 1.35 3.35 --99.01 12.21 0.00 86.80
MW-24 12/28/21 0.0138 0.00414 0.00194 0.00588 0.019 <0.000101 1.13 1.76 --99.01 12.68 0.00 86.33
MW-24 03/30/22 0.0109 0.00386 0.00221 0.00599 0.051 <0.000101 1.90 1.08 --99.01 12.52 0.00 86.49
MW-24 06/09/22 0.0119 0.00348 0.00262 0.00698 0.0543 <0.000101 2.73 1.23 --99.01 11.95 0.00 87.06
MW-24 08/11/22 0.0216 0.00563 0.00503 0.00833 0.0522 <0.000101 2.88 1.32 --99.01 12.22 0.00 86.79
DERR ISL
RBCA Tier 1 SL Not applicable
71887 Tables 2SA24 2024_V0 1/2
Table 2
Post Remediation Groundwater Gauging and Analytical Results - Select Wells
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date Benzene Toluene Ethyl-Benzene Total Xylenes Naphthalene MTBE TPH-GRO
TPH-DRO
w/o SGC
TPH-DRO
w/SGC TOC DTW
Product
Thickness GWE
MM/DD/YY (mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(feet)1 (feet btoc)(feet)(feet)
0.005 1.0 0.7 10 0.700 0.200 1 1 1
0.300 3.0 4 10 0.700 0.200 10 10 10
DERR ISL
RBCA Tier 1 SL Not applicable
MW-24 05/16/23 0.00955 0.00343 0.00542 0.00536 0.0609 <0.000101 1.12 1.20 0.345 99.01 9.87 0.00 89.14
MW-24 08/09/23 0.01330 0.00593 0.01270 0.01290 0.0395 <0.000101 2.04 2.66 2.14 99.01 11.53 0.00 87.48
MW-24 04/16/24 0.00785 0.00282 0.00253 0.00446 0.0205 <0.000101 0.957 0.883 0.308 99.01 9.94 0.00 89.07
MW-24 09/04/24 0.0173 0.00225 0.00311 0.00517 0.0130 <0.000101 2.31 1.49 0.593 B 99.01 11.78 0.00 87.23
Notes:
1. Feet above reference benchmark
TPH-GRO = total petroleum hydrocarbons - gasoline range organics analyzed by USEPA Method 8015B Modified.
TPH-DRO = total petroleum hydrocarbons - diesel range organics analyzed by USEPA Method 8015B.
Benzene, toluene, ethylbenzene, total xylenes, naphthalene, and MTBE analyzed by USEPA Method 624, 8020, after 12/99 8021 B, and as of 6/17/03 8260B.
Acronyms and Abbreviations:
Bold = Result exceeds DERR ISL.
Shaded cell result exceed RBCA Tier 1 SL.
Pre-Remediation Baseline Results
* = erroneous field reading
< = not detected at concentrations at or above the method detection limit. The method detection limit is listed in the analytical report.
-- = Not Applicable
btoc = below top of casing
DERR = Division of Environmental Response and Remediation
DERR ISL = DERR Initial Screening Level
DTW = depth to water
GWE = groundwater elevation, based on site benchmark corrected for product if present, using a specific gravity of 0.75
mg/L = milligram per liter
MTBE = methyl tertiary butyl ether
RBCA = Risk-Based Corrective Action
TOC = top of casing (assumed benchmark)
Qualifiers:
J = Estimated value. Result is above or equal to the Method Detection Limit (MDL or DL) and below the Limit of Quantitation (LOQ or RL)
J* = Drift continuing calibration criteria of 20 percent exceeded for benzene for some samples. Result is estimated.
B = The same analyte is found in the associated blank.
RBCA Tier 1 SL = RBCA Tier 1 Screening Level. Only applicable when 1. No buildings, property boundaries or utility lines within 30 feet of the highest measured concentration of any contaminant that is
greater than the ISL but less than or equal to the Tier 1 SL, and, no water wells or surface water within 500 feet of highest measured concentration of any contaminant that is greater than the ISL but less than or
equal to the Tier 1 SL.
71887 Tables 2SA24 2024_V0 2/2
Table 3
Current and Historical Natural Attenuation Parameter Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date
Methane
mg/L
Calcium,
Dissolved
mg/L
Magnesium
mg/L
Nitrogen, Nitrate
as N
mg/L
Ferrous Iron
mg/L
Iron, Total
mg/L
Iron, Dissolved
mg/L
Manganese,
Total
mg/L
Manganese,
Dissolved
mg/L
Sulfate
mg/L
Sulfide
mg/L
Nitrite as
Nitrogen
mg/L
Orthophosphate
as Phosphorous
mg/L
Dissolved
Inorganic
Carbon
mg/L
Alkalinity, Total
as CaCO3
mg/L
Total Dissolved
Solids (TDS)
mg/L
Dissolved Oxygen1
mg/L
ORP1
mV
Specific
Conductivity1
µS/cm
Upgradient
MW-2 12/12/19 <0.0050 154 67 <0.1 1.07 ----0.277 --71.5 <0.1 0.00107 26.4 22.5 J 505 1,420 0.11 -99.5 2,457
MW-2 04/06/21 0.0522 158 V --<0.1 0.739 T8 6.31 O1 3.24 0.337 O1 0.33 77.6 <0.05 ------499 1,610 0.06 -0.9 2,326
MW-2 09/13/21 --------------------------------0.06 -71.3 2,720
MW-2 03/31/22 ------------------77.8 <0.025 ----------0.05 -108.3 2,811
MW-2 06/08/22 <0.1 143 --<0.1 1.23 T8 3.66 1.24 0.399 0.305 74.3 <0.025 T8 ------502 1,410 0.04 -50.3 2,290
MW-2 08/10/22 ------------------60.4 [59.3]<0.025 [<0.025]----------0.02 -57.9 2,350
MW-2 05/16/23 ------------------69.9 [66.6]--------483 [473]--0.23 24.6 2,690
MW-2 08/08/23 ------------------68.7 [68.6]--------451 [445]--0.13 -63.6 2,340
MW-2 04/15/24 ------------------86.1 --------498 --0.43 7.9 2,520
MW-2 09/03/24 ------------------91.5 J6 --------468 --0.15 -28.9 2,800
MW-3 12/12/19 0.091 125 65.000 <0.1 1.240 ----0.181 --60.0 <0.01 0.004 57.800 53.200 517 1,150 0.10 -198.3 2,210
MW-3 04/06/21 0.287 132 --<0.1 3.95 T8 4.47 3.36 0.219 0.21 54.6 <0.05 ------554 1,390 0.10 -60.8 1,984
MW-3 09/13/21 --------------------------------0.10 -95.2 2,550
MW-3 03/31/22 ------------------51.2 <0.025 ----------0.36 -122.0 2,590
MW-3 06/09/22 0.0812 133 --<0.1 Q 1.01 T8 1.18 0.969 0.173 0.176 51.4 <0.025 ------497 2,500 0.07 -102.8 2,020
MW-3 08/10/22 ------------------50.8 <0.025 ----------0.10 -85.1 2,220
MW-3 05/16/23 ------------------42.0 --------749 --0.20 -90.4 2,440
MW-3 08/08/23 ------------------33.8 --------613 --0.18 -116.2 2,330
MW-3 04/15/24 ------------------49.2 --------715 --0.30 -54.7 2,440
MW-3 09/03/24 ------------------78.4 J6 --------554 --0.16 -102.7 2,670
MW-11 12/12/19 --------------------------------------
MW-11 04/07/21 <0.01 243 --0.0763 J 0.068 T8 0.281 0.023 J 0.0144 0.00578 J 72.5 <0.05 ------535 1,180 4.43 181.9 2,030
MW-11 09/14/21 --------------------------------0.14 -84.8 2,600
MW-11 03/30/22 ------------------136 <0.025 ----------0.24 -80.9 2,411
MW-11 06/09/22 0.135 315 --0.0933 J Q 0.0740 T8 0.106 <0.1 0.215 0.0872 109 <0.025 ------522 2,270 1.32 62.9 4,700
MW-11 08/11/22 ------------------88.9 <0.025 Q ----------0.24 -18.4 4,610
MW-11 05/16/23 ------------------53.7 --------497 --0.50 9.8 2,690
MW-11 08/08/23 ------------------94.3 --------723 --0.00 18.8 3,630
MW-11 04/15/24 ------------------39.8 [39.9]--------514 [514]--4.56 146.9 2,090
MW-11 09/04/24 ------------------43.7 [10.6]------740 [740]--0.31 35.9 3,710
Plume/Plume Fringe
MW-4 12/12/19 0.36 115 45.7 0.058 J 3.94 ----0.435 --7.6 <0.01 0.00124 60.3 51.6 400 868 2.10 -156.4 1,743
MW-4 04/06/21 2.99 163 V --<0.1 14.5 T8 10.6 10.2 0.609 0.592 1.56 <0.05 ------534 1,230 0.11 -77.9 1,863
MW-4 09/13/21 --------------------------------0.33 -134.1 1,480
MW-4 03/31/22 ------------------6.9 ------------0.07 -120.1 2,282
MW-4 06/08/22 0.922 153 --<0.1 0.627 T8 14.9 16 0.533 0.907 0.751 J <0.025 T8 ------271 442 0.74 -46.2 2,480
MW-4 08/10/22 ------------------0.936 J <0.025 ----------0.02 -87.9 738
MW-4 05/17/23 ------------------15.7 --------534 --0.19 -86.5 2,460
MW-4 08/09/23 ------------------0.889 J --------589 --0.00 -103.7 2,330
MW-4 04/16/24 ------------------14.9 --------371 --0.27 -124.6 1,450
MW-4 09/04/24 ------------------2.91 J --------613 --0.30 -95.5 2,720
MW-6 12/12/19 3.5 E 134 [136]95.2 [91.2]<0.1 28.2 ----0.369 [0.378]--5.8 0.21 J 0.0282 54.5 46 611 1,280 0.24 -199.7 2,561
MW-6 04/06/21 1.64 139 --<0.1 9.24 T8 0.99 8.56 0.321 0.323 7.31 <0.05 ------564 1,400 0.06 -73.3 2,065
MW-6 09/13/21 ------------------18.5 <0.025 ----------
MW-6 12/28/21 ------------------16.9 <0.025 [<0.025]----------0.03 -84.2 2,100
MW-6 03/31/22 ------------------15.2 <0.025 ----------0.08 -97.1 2,097
MW-6 06/08/22 0.161 142 --1.09 70.2 T8 8.81 3.42 0.208 0.169 25.3 <0.025 T8 ------536 1,390 0.06 -46.2 2,320
MW-6 08/10/22 ------------------22.0 <0.025 ----------0.04 -44.6 2,890
MW-6 05/17/23 ------------------32.7 --------638 --0.18 55.6 2,740
MW-6 08/09/23 ------------------12.4 --------658 --0.22 -138.9 2,900
MW-6 04/16/24 ------------------38.6 [38.6]--------761 [768]--0.18 -32.3 2,590
MW-6 09/04/24 ------------------16.6 [14.2]--------621 [636]--0.31 -157.9 3,040
MW-23 12/12/19 2.1 131 73.8 <0.1 8.83 ----0.363 --2.2 J 0.16 J 0.00883 51.9 46.1 620 1,220 0.22 -187.3 3,869
MW-23 04/07/21 1.31 116 --<0.1 3.13 T8 3.06 2.56 0.283 0.251 6.24 <0.05 ------529 796 0.01 -106.6 1,210
MW-23 09/14/21 ------------------<0.594 <0.025 ----------0.16 -127.8 2,260
MW-23 12/28/21 ------------------8.97 <0.025 ----------0.02 -120.8 1,370
MW-23 03/30/22 ------------------1.90 J [1.91 J]<0.025 [<0.025]----------0.15 -121.4 1,398
MW-23 06/09/22 1.91 [2.06]134 [135]--<0.1 [<0.1 Q]6.75 T8 [6.65 T8]6.61 [6.67]6.51 [6.53]0.361 [0.363]0.365 [0.363]1.98 J [2.15 J]<0.025 [<0.025]------582 [582]995 [984]0.05 -161.1 1,810
MW-23 08/11/22 ------------------<0.594 <0.025 Q ----------0.03 -123.9 2,400
MW-23 05/17/23 ------------------1.43 J --------536 --0.16 -92.5 2,640
MW-23 08/09/23 ------------------1.01 J --------575 --0.21 -114.2 2,330
MW-23 04/16/24 ------------------8.51 --------371 --0.25 -48.6 790
MW-23 09/04/24 ------------------3.56 J --------591 --0.43 -130.1 2,620
MW-24 12/12/19 3.1 E 141 87.5 <0.1 16.9 ----0.237 --17.9 0.16 J 0.0169 38 33 587 1,420 0.25 -207.1 4,089
MW-24 04/07/21 4.51 145 --<0.1 10.5 T8 12.4 9.27 0.278 0.238 13.4 <0.05 ------576 1,270 0.05 -80.1 2,310
MW-24 09/14/21 ------------------5.53 <0.025 ----------0.04 -150.0 2,730
MW-24 12/28/21 ------------------2.25 J <0.025 ----------0.11 -116.2 2,520
MW-24 03/30/22 ------------------5.25 <0.025 ----------0.16 -129.1 2,409
MW-24 06/09/22 4.16 144 --<0.1 10.2 T8 11.2 11.4 0.217 0.22 11.2 <0.025 ------576 965 0.05 -141.9 2,510
MW-24 08/11/22 ------------------4.99 J <0.025 Q ----------0.10 -118.3 2,490
MW-24 05/17/23 ------------------159 --------549 --0.13 -47.1 1,770
MW-24 08/09/23 ------------------196 --------548 --0.18 -131.6 2,380
MW-24 04/16/24 ------------------75.4 --------600 --0.22 -56.8 1,740
MW-24 09/04/24 ------------------10.8 --------575 --0.26 -156.5 3,090
Downgradient
MW-25 12/12/19 0.26 139 64.6 <0.1 0.891 ----0.308 --23.5 0.36 0.000891 41 36.5 555 1,010 0.13 -197.1 3,557
MW-25 04/07/21 0.531 134 --0.0675 J 1.42 T8 1.43 1.18 0.311 0.278 30 <0.05 ------541 1,100 0.01 -68.1 1,700
MW-25 09/14/21 --------------------------------0.09 -129.8 2,240
MW-25 03/31/22 ------------------35.9 <0.025 ----------0.07 -120.10 2,353
MW-25 06/09/22 0.215 150 --<0.1 0.5 T8 0.737 0.473 0.298 O1 0.301 34.8 <0.025 ------549 1,080 0.04 -128.9 2,090
MW-25 08/11/22 ------------------22.4 <0.025 Q ----------0.13 -98 2,080
MW-25 05/17/23 ------------------84.1 --------543 --0.19 -27.7 1,930
MW-25 08/09/23 ------------------26.6 --------563 --0.01 -114.8 1,920
MW-25 04/16/24 ------------------86.6 --------592 --0.32 -28.6 1,720
71887 Tables 2SA24 2024_V0 1/2
Table 3
Current and Historical Natural Attenuation Parameter Results
Former Chevron Station No. 7-1887
2003 S. Washington Boulevard, Ogden, Utah
Sample Location Date
Methane
mg/L
Calcium,
Dissolved
mg/L
Magnesium
mg/L
Nitrogen, Nitrate
as N
mg/L
Ferrous Iron
mg/L
Iron, Total
mg/L
Iron, Dissolved
mg/L
Manganese,
Total
mg/L
Manganese,
Dissolved
mg/L
Sulfate
mg/L
Sulfide
mg/L
Nitrite as
Nitrogen
mg/L
Orthophosphate
as Phosphorous
mg/L
Dissolved
Inorganic
Carbon
mg/L
Alkalinity, Total
as CaCO3
mg/L
Total Dissolved
Solids (TDS)
mg/L
Dissolved Oxygen1
mg/L
ORP1
mV
Specific
Conductivity1
µS/cm
MW-25 09/04/24 ------------------41.3 --------533 --0.22 -88.5 2,310
MW-26 12/12/19 0.065 137 68.2 <0.1 2.76 ----0.429 --22.1 <0.1 0.00276 62.3 58 556 1,080 0.12 -139.6 3,593
MW-26 04/07/21 <0.01 142 --0.138 0.53 T8 0.819 0.674 0.255 0.236 39.6 <0.05 ------528 1,140 0.08 1.9 1,720
MW-26 09/14/21 --------------------------------0.09 -144.9 2,240
MW-26 03/31/22 ------------------60.9 <0.025 ----------0.04 -130.3 2,347
MW-26 06/09/22 0.0563 151 O1 V --0.0531 J 0.0600 T8 1.54 0.195 0.488 0.462 O1 44.6 <0.025 ------549 884 0.29 -7.9 2,200
MW-26 08/11/22 ------------------34.1 <0.025 Q ----------0.09 -104.7 2,080
MW-26 05/17/23 ------------------59.2 --------566 --0.76 45.2 1,830
MW-26 08/09/23 ------------------28.3 --------557 --0.00 -27.9 2,000
MW-26 04/16/24 ------------------39.6 --------558 --0.33 42.5 1,940
MW-26 09/04/24 ------------------51.6 --------540 --0.18 -153.4 2,310
MW-27 12/12/19 0.0032 J 111 76.7 4.5 <0.1 ----0.674 --73 <0.1 0.0001 51.9 48.1 463 1,090 0.34 -75.1 3,365
MW-27 04/07/21 0.0458 [0.0337]140 [140]--0.798 [1.42 J6]0.168 T8 [0.232 T8]0.294 [0.288]0.500 [0.464]0.137 [0.134]0.212 [0.176]72.2 [71.9]<0.05 [<0.05] ------478 [477]1,240 [1,170]3.04 26.9 1,860
MW-27 09/14/21 --------------------------------0.11 55.1 2,360
MW-27 03/31/22 ------------------75.3 <0.025 ----------0.12 29.1 2,359
MW-27 06/09/22 <0.01 135 --1.11 Q 0.0360 J T8 0.0251 J <0.1 0.0383 0.00799 J 73.7 <0.025 ------497 1,270 2.41 59.1 2,320
MW-27 08/11/22 ------------------73.5 <0.025 Q ----------0.31 78.1 2,380
MW-27 05/17/23 ------------------77.7 --------356 --6.34 75.4 992
MW-27 08/09/23 ------------------77.7 --------390 --0.00 44.5 1,090
MW-27 04/16/24 ------------------74.5 --------393 --6.78 150.9 1,090
MW-27 09/04/24 ------------------73.2 --------438 --0.38 5.8 1,980
Notes:
Acronyms and Abbreviations:Qualifiers:
Pre-Remediation Baseline Results
< = Result is nondetect and reported at reporting limit (RL).
CaCO3 = calcium carbonate E = Concentration exceeds the calibration range
[DUP] = Duplicate Sample
mg/L = milligram per liter J = Estimated value. Result is greater than or equal to the method detection limit (MDL) and less than the limit of quantitation.
mV = millivolt J6 = The sample matrix interfered with the ability to make any accurate determination; spike value is low.
ORP = oxidation-reduction potential T8 = Sample(s) received past/too close to holding time expiration.
µg/L = microgram per liter O1 = The analyte failed the method required serial dilution test and/or subsequent post-spike criteria. These failures indicate matrix interference.
µS/cm = microSiemen per centimeter V = The sample concentration is too high to evaluate accurate spike recoveries.
1. Parameter was measured and recorded during groundwater sampling event using a water quality meter. Readings were collected until stabilized
and then sample was collected. Final reading reported.
71887 Tables 2SA24 2024_V0 2/2

FIGURES

PROJECT
LOCATION
Approximate Scale: 1 in. = 2,000 ft.
0 2,000'4,000'
SITE LOCATION MAP
MAP SOURCE: BASE MAP USGS 7.5. MIN. TOPO. QUAD., OGDEN, UT 2017
FORMER CHEVRON STATION NO. 7-1887
2003 SOUTH WASHINGTON BOULEVARD
OGDEN, UTAH
N
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OGDEN 1
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EVEREAL-ESTATE, LLC.
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010430012
PROPERTY RESERVE, INC.
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FORMER SOIL VAPOR
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LOCATION
FORMER UST
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FORMER DISPENSER LOCATION
FORMER
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BEXELL CHEVRON
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MW-24
MW-25
MW-11
MW-12
SB-1A
SB-4A
SB-3A
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NOTES:
1.BASE MAP PROVIDED BY LEIDOS, INC., DATED 6/14/2018,
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2.ALL SITE FEATURES AND LOCATIONS ARE APPROXIMATE.
FIGURE
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2003 SOUTH WASHINGTON BOULEVARD
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LEGEND:
MONITORING WELL LOCATION
DESTROYED WELL LOCATION
SOIL BORING / GRAB GROUNDWATER
SOIL BORING
SITE BOUNDARY
MW-1
BH-1
SB-1A
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APPROXIMATE LOCATION OF PFBs (JUNE 2021)
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FORMER SOIL
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LOCATIONFORMER UST
LOCATIONS
FORMER
DISPENSER
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LUBRICATION
EVEREAL-ESTATE, LLC.
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JENSAR, LLC.
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FORMER SOIL
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SYSTEM
LOCATIONFORMER UST
LOCATIONS
FORMER
DISPENSER
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MUFFLER
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AUTO
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BEXELL CHEVRON
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(NC)MW-27
(NC)
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MW-2
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MW-4
(87.26)
MW-6
(87.27)
MW-23
(87.78)*
MW-24
(87.23)
MW-25
(87.11)
MW-11
(87.79)
MW-12
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MW-5
MW-21
MW-7
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MW-20
MW-19
MW-15
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GROUNDWATER ELEVATION
CONTOUR MAP
SEPTEMBER 3, 2024
APPROXIMATE SCALE : 1 in. = 40 ft.
0 40'80'
N
NOTES:
1.BASE MAP PROVIDED BY LEIDOS, INC., DATED
6/14/2018, AT A SCALE OF 1" = 40'.
2.ALL SITE FEATURES AND LOCATIONS ARE
APPROXIMATE.
(NC)
(87.79)
87.60
MW-2
(NM)
LEGEND:
MONITORING WELL LOCATION
DESTROYED WELL LOCATION
GROUNDWATER ELEVATION NOT CALCULATED DUE
TO LACK OF LAND SURVEY DATA FOR TOP OF CASING.
GROUNDWATER ELEVATION (FEET)
GROUNDWATER ELEVATION CONTOUR (DASHED WHERE INFERRED)
APPROXIMATE GROUNDWATER FLOW DIRECTION
NOT MEASURED
WELL NOT USED FOR CONTOURING
SITE BOUNDARY
OFFSITE BOUNDARY
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2003 SOUTH WASHINGTON BOULEVARD
OGDEN, UTAH
GROUNDWATER FLOW DIRECTION
NOTE: INCLUDES 22 EVENTS BEGINNING 4Q 2007
0.003
FT/FT
*
MW-19
MW-22 MW-7
MW-13 MW-14
MW-15
MW-1
MW-5
MW-21
MW-20
MW-26 MW-27
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FORMER SOIL
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DISPENSER
LOCATION
FORMER
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FORMER
STATION
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FORMER MASTER
MUFFLER
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AUTO
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BEXELL CHEVRON
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20th STREET
PRETTY YARD ART
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BH-1
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FORMER CHEVRON STATION NO. 7-1887
2003 SOUTH WASHINGTON BOULEVARD
OGDEN, UTAH
APPROXIMATE SCALE : 1 in. = 40 ft.
0 40'80'
N
MW-2
Date 12/12/2019 9/13/2021 3/31/2022 8/10/2022 5/16/2023 8/8/2023 04/15/24 09/03/24
B <0.0002 <0.0000941 <0.0000941 <0.0000941 [<0.000941]<0.0000941 [<0.0000941]<0.0000941 [<0.0000941]<0.0000941 <0.0000941
T <0.0002 <0.000278 <0.000278 <0.000278 [<0.00278]<0.000278 [<0.000278]<0.000278 [<0.000278]<0.000278 <0.000278
E <0.0004 <0.000137 <0.000137 <0.000137 [<0.00137]<0.000137 [<0.000137]<0.000137 [<0.000137]<0.000137 <0.000137
X <0.001 <0.000174 <0.000174 <0.000174 [<0.00174]<0.000174 [<0.000174]<0.000174 [<0.000174]<0.000174 <0.000174
Naph <0.001 <0.001 <0.001 0.00101 B J [<0.010]<0.00100 [<0.00100]<0.00100 [<0.00100]<0.00100 <0.00100 C3
MTBE <0.0002 <0.000101 <0.000101 <0.000101 [<0.00101] <0.000101 [<0.00101] <0.000101 [<0.00101] <0.000101 <0.000101
TPH-DRO <0.045 <0.0314 0.0747 J <0.0247 [<0.0247] <0.0247 [<0.0247] 0.0694 B J [0.0670 B J]0.0327 J 0.0633 J
TPH-DRO w/SGC <0.045 ------<0.0247 [<0.0247] 0.0694 B J [0.0684 B J]<0.0247 0.0633 J
TPH-GRO <0.025 0.0816 J <0.0314 <0.0314 [<0.0314]<0.0314 [<0.0314]<0.0314 [<0.0314]0.0458 B J 0.0477 B J
Sulfate 71.5 --78 60.4 [59.3]69.9 [66.6]68.7 [68.6]86.1 91.5 J6
Sulfide <0.100 --<0.025 <0.025 --------
MW-3
Date 12/12/2019 9/13/2021 3/31/2022 8/10/2022 5/16/2023 8/8/2023 04/15/24 09/03/24
B <0.0002 0.000151 J 0.000144 J 0.000345 J 0.000332 J 0.000167 J 0.000132 J <0.0000941
T <0.0002 <0.000278 <0.000278 <0.000278 <0.000278 <0.000278 <0.000278 <0.000278
E <0.0004 <0.000137 <0.000137 <0.000137 <0.000137 <0.000137 <0.000137 <0.000137
X <0.001 <0.000174 <0.000174 <0.000174 <0.000174 <0.000174 <0.000174 <0.000174
Naph <0.001 <0.001 <0.001 0.00140 B J <0.00100 <0.00100 <0.00100 <0.00100 C3
MTBE <0.0002 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101
TPH-DRO <0.046 0.121 0.401 0.15 0.588 0.678 0.771 0.384
TPH-DRO w/SGC <0.046 ------<0.0247 0.102 B <0.0247 0.106 B
TPH-GRO 0.045 J 0.253 0.188 B 0.197 B 0.0356 J 0.104 0.0720 B J 0.0890 B J
Sulfate 60 --51.2 50.8 42.0 33.8 49.2 78.4 J6
Sulfide <0.100 --<0.025 <0.025 --------
MW-4
Date 12/12/2019 9/13/2021 3/31/2022 8/10/2022 5/16/2023 8/9/2023 04/16/24 09/04/24
B 0.007 J*0.00761 0.00432 0.016 0.00127 0.0045 0.000920 J 0.00411
T 0.0009 J 0.00179 0.000305 J 0.00168 0.000280 J 0.000835 J 0.000307 J 0.00158
E <0.0004 0.000787 J <0.000137 0.000464 J <0.000137 0.000948 J 0.000201 J 0.000665 J
X 0.005 J 0.00705 0.00126 J 0.00369 0.000786 J 0.00442 0.00134 J 0.00368
Naph 0.003 J 0.00185 J <0.001 0.00170 B J <0.00100 0.00977 0.00127 J 0.00111 J
MTBE <0.0002 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101
TPH-DRO 1.2 8.35 12.2 24.1 0.415 2.01 0.995 2.76
TPH-DRO w/SGC 1.2 ------<0.0247 0.429 <0.0247 0.315 B
TPH-GRO 0.91 1.38 1.11 2.11 0.601 0.931 0.776 0.798 B
Sulfate 7.6 --51.2 50.8 15.7 0.889 J 14.9 2.91 J
Sulfide <0.100 --<0.025 <0.025 --------
MW-6
Date 12/12/2019 9/13/2021 12/28/2021 3/31/2022 6/8/2022 8/10/2022 5/16/2023 8/9/2023 04/16/24 09/04/24
B 1.2 J* [1.2 J*]0.168 [0.167]0.0641 [0.0640]0.0365 0.0411 0.0176 0.184 0.185 0.0388 [0.0273]0.184 [0.170]
T 0.017 [0.016]0.00185 [0.00165]0.000774 J [0.000794 J]0.000574 J 0.000403 J <00278 0.0213 <0.00278 0.000417 J [<0.000278]0.00217 [0.00197]
E 0.015 [0.016]0.00164 [0.00159]0.000247 J [0.000242 J]<0.000137 0.000144 J <0.00137 <0.000137 <0.00137 0.000143 J [<0.000137]0.000437 J [0.000375 J]
X 0.020 J [0.016 J]0.00381 [0.00371]0.00145 J [0.0015 J] 0.000847 J 0.000829 J <0.00174 0.0639 <0.00174 0.000638 J [<0.000174]0.00359 [0.00331]
Naph 0.018 J [0.017 J]0.00148 J [0.0016 J]<0.001 [<0.001]<0.001 <0.001 <0.010 <0.00100 <0.0100 <0.00100 [<0.00100]0.00179 J [0.00153 J]
MTBE <0.002 [<0.002]<0.000101 [<0.000101]<0.000101 [<0.000101] <0.000101 <0.000101 <0.00101 <0.000101 <0.00101 <0.000101 [<0.000101 ]<0.000101 [<0.000101]
TPH-DRO 0.110 J [0.110]0.802 [0.780]0.315 [0.359]0.241 0.196 0.336 0.0992 J 0.645 0.223 B [0.216 B]0.601 [0.589]
TPH-DRO w/SGC 0.110 J [0.110]----------0.0990 J 0.232 B <0.0247 [<0.0247]0.388 B [0.378 B]
TPH-GRO 3.4 [3.2]0.807 [0.838]0.246 [0.270]0.163 B 0.3 0.0964 B J 0.101 0.699 0.170 B [0.142 B]1.09 [1.01]
Sulfate 5.8 18.5 16.9 15.2 25.3 22 32.7 12.4 38.6 [38.6]16.6 [14.2]
Sulfide 0.210 J <0.025 <0.025 [<0.025]<0.025 <0.025 T8 <0.025 --------
MW-23
Date 12/12/2019 9/14/2021 12/28/2021 3/30/2022 6/9/2022 8/11/2022 5/17/2023 8/9/2023 04/16/24 09/04/24
B 0.140 J*0.172 0.0322 0.0491 [0.0471]0.0947 [0.0926]0.125 0.0420 0.0270 0.0053 0.0262
T 0.007 0.00843 0.00365 0.00659 [0.00634]0.00642 [0.00656]0.00478 0.00528 0.00357 0.000586 J 0.00221
E 0.009 0.00666 0.00605 0.00974 [0.00961]0.00644 [0.00669]0.00375 0.00676 0.00700 0.000813 J 0.00260
X 0.065 0.0643 0.0376 0.0463 [0.0440]0.0454 [0.0464]0.025 0.0502 0.0517 0.00425 0.0186
Naph 0.19 0.114 0.16 0.0869 [0.0858]0.104 [0.108]0.0248 0.117 E 0.107 0.00732 0.0426
MTBE <0.001 <0.000101 <0.000101 <0.000101 [<0.000101] <0.000101 [<0.000101] <0.000101 <0.000101 <0.000101 <0.000101 <0.000101
TPH-DRO 0.57 1.44 7.49 4.66 [4.47]1.58 [1.75]0.749 0.930 1.41 0.249 B 0.899
TPH-DRO w/SGC 0.57 ----------0.521 1.44 0.0748 J 0.624 B
TPH-GRO 5.3 5.65 3.13 4.80 [4.28]5.97 [5.49]3.11 3.51 3.27 0.456 3.36
Sulfate 2.2 J <0.594 8.97 1.9 J [1.91 J]1.98 J [2.15 J]<0.594 1.43 J 1.01 J 8.51 3.56 J
Sulfide 0.160 J <0.025 <0.025 <0.025 <0.025 <0.025 Q --------
MW-24
Date 12/12/2019 9/14/2021 12/28/2021 3/30/2022 6/9/2022 8/11/2022 5/17/2023 8/9/2023 04/16/24 09/04/24
B 0.017 J*0.0145 0.0138 0.0109 0.0119 0.0216 0.00955 0.0133 0.00785 0.0173
T 0.007 0.00661 0.00414 0.00386 0.00348 0.00563 0.00343 0.00593 0.00282 0.00225
E 0.004 J 0.00434 0.00194 0.00221 0.00262 0.00503 0.00542 0.0127 0.00253 0.00311
X 0.016 J 0.0129 0.00588 0.00599 0.00698 0.00833 0.00536 0.0129 0.00446 0.00517
Naph 0.057 0.0846 0.019 0.051 0.0543 0.0522 0.06090 0.0395 0.0205 0.0130
MTBE <0.001 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101
TPH-DRO 0.56 1.35 1.13 1.08 1.23 1.32 1.20 2.66 0.883 1.49
TPH-DRO w/SGC 0.56 ----------0.345 2.14 0.308 0.593 B
TPH-GRO 3.5 3.35 1.76 1.90 2.73 2.88 1.12 2.04 0.957 2.31
Sulfate 17.9 5.53 2.25 J 5.25 11.2 4.99 J 159 196 75.4 10.8
Sulfide 0.160 J <0.025 <0.025 <0.025 <0.025 <0.025 Q --------
MW-25
Date 12/12/2019 9/14/2021 3/31/2022 8/11/2022 5/17/2023 8/9/2023 04/16/24 09/04/24
B 0.004 J 0.000138 J <0.0000941 <0.0000941 0.0128 0.00307 0.00384 <0.0000941
T <0.0002 <0.000278 <0.000278 <0.000278 0.000624 J <0.000278 <0.000278 <0.000278
E <0.0004 <0.000137 <0.000137 <0.000137 0.00152 <0.000137 0.000188 J <0.000137
X <0.001 <0.000174 <0.000174 <0.000174 0.00522 <0.000174 <0.000174 <0.000174
Naph <0.001 <0.001 <0.001 <0.001 0.00777 <0.00100 <0.00100 <0.00100 C3
MTBE <0.0002 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101
TPH-DRO <0.052 0.0314 J 0.11 0.0696 J 0.147 0.505 0.176 0.205
TPH-DRO w/SGC <0.052 ------0.504 0.0912 B J 0.0333 J 0.0567 B J
TPH-GRO 0.2 0.112 0.106 B 0.107 0.608 0.285 0.264 B 0.246 B
Sulfate 23.5 --35.9 22.4 84.1 26.6 86.6 41.3
Sulfide 0.36 --<0.025 <0.025 Q --------
MW-26
Date 12/12/2019 9/14/2021 3/31/2022 8/10/2022 5/16/2023 8/9/2023 04/16/24 9/4/2024
B <0.0002 <0.0000941 <0.0000941 <0.0000941 0.00210 0.00493 0.00269 <0.0000941
T <0.0002 <0.000278 <0.000278 <0.000278 <0.000278 <0.000278 <0.000278 <0.000278
E <0.0004 <0.000137 <0.000137 <0.000137 <0.000137 <0.000137 <0.000137 <0.000137
X <0.001 <0.000174 <0.000174 <0.000174 <0.000174 <0.000174 <0.000174 <0.000174
Naph <0.001 <0.001 <0.001 <0.001 0.00195 J <0.00100 <0.00100 <0.00100 C3
MTBE <0.0002 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101
TPH-DRO <0.046 0.0249 J 0.0993 J 0.148 0.0516 J 0.312 B 0.15 B 0.144
TPH-DRO w/SGC <0.046 ------0.0516 J 0.0659 B J <0.0247 0.0621 B J
TPH-GRO 0.87 <0.0314 <0.0314 <0.0314 <0.0314 0.140 0.123 B 0.110 B
Sulfate 22.1 --60.9 34.1 59.2 28.3 39.6 51.6
Sulfide <0.100 --<0.025 <0.025 Q --------
MW-11
Date 9/14/2021 3/30/2022 8/10/2022 5/16/2023 8/8/2023 04/15/24 09/04/24
B 0.00217 <0.0000941 0.000206 J <0.0000941 <0.0000941 <0.0000941 [<0.0000941]<0.0000941 [<0.0000941]
T 0.000736 J <0.000278 <0.000278 <0.000278 <0.000278 <0.000278 [<0.000278]<0.000278 [<0.000278]
E 0.00208 <0.000137 <0.000137 <0.000137 <0.000137 <0.000137 [<0.000137]<0.000137 [<0.000137]
X 0.00249 J <0.000174 <0.000174 <0.000174 <0.000174 <0.000174 [<0.000174 ]<0.000174 [<0.000174]
Naph 0.00157 J <0.001 <0.001 <0.00100 <0.00100 <0.00100 [<0.00100]<0.00100 C3 [<0.00100]
MTBE <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 [ <0.000101]<0.000101 [<0.000101]
TPH-DRO 0.727 0.188 0.701 <0.0247 0.192 B 0.0910 J [0.0690 J]0.179 [0.195]
TPH-DRO w/SGC ------<0.0247 0.0538 B J <0.0247 [<0.0247]0.0591 B J [0.254 B]
TPH-GRO 0.334 <0.0314 <0.0314 <0.0314 <0.0314 0.0481 B J [0.0334 B J]0.0588 B J [0.0653 B J]
Sulfate --136 88.9 53.7 94.3 39.8 [39.9]43.7 [10.6]
Sulfide --<0.025 <0.025 Q --------
MW-27
Date 12/12/2019 9/14/2021 3/31/2022 8/11/2022 5/16/2023 8/9/2023 04/16/24 09/04/24
B <0.0002 <0.0000941 <0.0000941 <0.0000941 <0.0000941 <0.0000941 <0.0000941 <0.0000941
T <0.0002 <0.000278 <0.000278 <0.000278 <0.000278 <0.000278 <0.000278 <0.000278
E <0.0004 <0.000137 <0.000137 <0.000137 <0.000137 <0.000137 <0.000137 <0.000137
X <0.001 <0.000174 <0.000174 <0.000174 <0.000174 <0.000174 <0.000174 <0.000174
Naph <0.001 <0.001 <0.001 <0.001 <0.00100 <0.00100 <0.00100 <0.00100
MTBE <0.0002 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101 <0.000101
TPH-DRO <0.046 <0.0314 0.0798 J 0.0366 J <0.0247 0.0677 B J <0.0247 0.0604 J
TPH-DRO w/SGC <0.046 ------<0.0247 0.067 B J <0.0247 0.0604 J
TPH-GRO 0.14 0.0763 J <0.0314 <0.0314 <0.0314 <0.0314 0.0368 B J 0.0461 B J
Sulfate 73 --75.3 73.5 77.7 77.7 74.5 73.2
Sulfide <0.100 --<0.025 <0.025 Q --------
LEGEND:
MONITORING WELL LOCATION
DESTROYED WELL LOCATIONMW-1
DIVISION OF ENVIRONMENTAL
INITIAL SCREENING LEVELS
DERR
ISLs
RESPONSE AND REMEDIATION
SCREENING LEVELSSLs
SITE BOUNDARY
OFFSITE BOUNDARY
B BENZENE
T TOLUENE
E ETHYLBENZENE
X TOTAL XYLENES
Naph NAPHTHALENE
MTBE METHY-TERT BUTYL ETHER
TPH-DRO TPH - DIESEL RANGE ORGANICS
TPH-GRO
ID ANALYTE
0.005
1
0.7
10
0.7
0.2
1
1
DERR ISLs
0.3
3
4
10
0.7
0.2
10
10
TIER 1 SLs
Sulfide SULFIDE
Sulfate
--
--
--
--SULFATE (SO4)
TPH-DRO w/SGC
TPH - GASOLINE RANGE ORGANICS
TPH - DIESEL RANGE ORGANICS
WITH SILICA GEL CLEANUP
1 10
BH-1 BOREHOLE LOCATION FOR BH-1
THRU BH-5 (1989/2015) GRAB
GROUNDWATER SAMPLING
14.
GROUNDWATER ANALYTICAL DATA
DECEMBER 2019- SEPTEMBER 2024
MW-2
NOTES:
1.BASE MAP PROVIDED BY LEIDOS, INC., DATED 6/14/2018, AT A
SCALE OF 1" = 40'.
2.ALL SITE FEATURES AND LOCATIONS ARE APPROXIMATE.
3.RESULTS IN MILLIGRAMS PER KILOGRAM (mg/L).
4.B= THE SAME ANALYTE IS FOUND IN THE ASSOCIATED BLANK.
5.C3 = THE REPORTED CONCENTRATION IS AN ESTIMATE. THE
CONTINUING CALIBRATION STANDARD ASSOCIATED WITH THIS
DATA RESPONDED LOW. METHOD SENSITIVITY CHECK IS
ACCEPTABLE.
6.E = THE ANALYTE CONCENTRATION EXCEEDS THE UPPER LIMIT
OF THE CALIBRATION RANGE OF THE INSTRUMENT
ESTABLISHED BY THE INITIAL CALIBRATION (ICAL).
7.J = ESTIMATED VALUE
8.J*= DRIFT CONTINUING CALIBRATION CRITERIA OF 20 PERCENT
EXCEEDED FOR BENZENE FOR SOME SAMPLES. RESULT IS
ESTIMATED
9.J6 = THE SAMPLE MATRIX INTERFERED WITH THE ABILITY TO
MAKE ANY ACCURATE DETERMINATION; SPIKE VALUE IS LOW.
10.Q = SAMPLE WAS PREPARED AND/OR ANALYZED PAST
HOLDING TIME AS DEFINED IN THE METHOD. CONCENTRATIONS
SHOULD BE CONSIDERED MINIMUM VALUES.
11.[ ] = INDICATES DUPLICATE SAMPLE
12.< = NOT DETECTED AT OR ABOVE METHOD DETECTION LIMIT
13.-- = NOT SAMPLED
BOLD = EXCEEDS DERR ISLs
15. SHADED CELL RESULTS EXCEED RBCA TIER 1 SLSs

ATTACHMENT A

Field Data Sheets
Groundwater Gauging Log
Project Number 30063823
Client: Chevron
Site ID:71887
Site Location:Ogden, Utah
Measuring Point:Top of Casing
Date(s):09/03/2024
Sampler(s):Bridger Cherry
Gauging Equipment:Water Level Meter
Well ID Date Gauging
Time
Static Water Level
(ft bmp)
Depth to
Product (ft
bmp)
Total Depth (ft
bmp)
PID Reading
(ppm)
LNAPL Removed
(gal)
Comments
MW-2 09/03/2024 09:44 11.24 ND 16.38 ------
MW-3 09/03/2024 09:39 11.08 ND 16.85 ------
MW-4 09/03/2024 12:28 10.94 ND 14.55 ------
MW-6 09/03/2024 12:28 12.48 ND 18.91 ------
MW-11 09/03/2024 09:52 11.29 ND 15.59 ----Well vault needs replaced,
recommend including a
concrete pad
MW-23 09/03/2024 11:54 11.23 ND 19.70 ------
MW-24 09/03/2024 11:58 11.78 ND 20.19 ------
MW-25 09/03/2024 11:32 10.45 ND 19.90 ------
MW-26 09/03/2024 11:39 10.36 ND 20.13 ------
MW-27 09/03/2024 11:42 11.58 ND 19.64 ------
ft-bmp = feet below measuring point ND = Not Detected PID = Photoionization Detector Reading
ppm = parts per million -- = Not Recorded
Chevron Groundwater Sampling Form
Project Number 30063823 Well ID MW-6 Date 9/4/2024
Site Location Ogden, Utah Site ID 71887 Weather
(°F)Clear Sampled by Bridger
Cherry
Measuring Point
Description Top of Casing Screen
Depth Interval (ft-bmp)-- to --
Casing
Diameter
(in.)
4 Well Casing
Material
Static Water
Level (ft-bmp)12.48 Total Depth (ft-bmp)18.91
Water
Column
(ft)
6.43 Gallons in
Well 4.18
Water Quality Meter
Make/Model YSI Pro Plus Purge Method Low-Flow Collection Type Grab
Sample Time 17:50
Purge Start 17:25
Purge End 17:46
Well Volumes
Purged
0.13
Gallons Purged 0.55
Total Purge Time
(h:m)
0:21
Sample ID MW-6-W-
20240904
Duplicate
ID
DUP-2-W-
20240904
Purge
Equipment Peristaltic
Sample
Equipment
Peristaltic
Appearance
Time Rate
(ml/min)
Depth to
Water
(ft)
pH
(standard
units)
Conductivity
(mS/cm)
Turbidity
(NTU)
Dissolved
Oxygen
(mg/L)
Temperature
(°C)
Redox
(mV)Color Odor
17:30 100 12.61 6.88 3.07 6.6 0.67 22.40 -161.9 Clear --
17:35 100 12.66 6.87 3.06 4.4 0.44 22.40 -154.6 Clear --
17:40 100 12.7 6.87 3.05 3.9 0.34 22.40 -158.1 Clear --
17:45 100 12.74 6.88 3.04 4.1 0.31 22.50 -157.9 Clear --
Comments:None
Well Casing Volume Conversion
Well diameter (in.) =
gallons per foot
1 = 0.04 1.5 = 0.09 2.5 = 0.26 3.5 = 0.50 6 = 1.47
1.25 = 0.06 2 = 0.16 3 = 0.37 4 = 0.65
Sample Information
Sample ID:MW-6-W-20240904 Sample Time:17:50 Sample Depth (ft-bmp)
(e.g. pump intake):18
Analytes and Methods:See Chain-of-Custody.Depth to Water at Time of
Sampling 12.74
ft-bmp = feet below measuring point mS/cm = milliSiemens per centimeter mV = millivolts
in. = inches NTU = Nephelometric Turbidity Unit °F = degrees Fahrenheit
ft = feet mg/L = milligrams per liter °C = degrees Celsius
mL/min = milliliters per minute PVC = Polyvinyl Chloride -- = Not Recorded
Chevron Groundwater Sampling Form
Project Number 30063823 Well ID MW-2 Date 9/3/2024
Site Location Ogden, Utah Site ID 71887 Weather
(°F)Clear Sampled by Bridger
Cherry
Measuring Point
Description Top of Casing Screen
Depth Interval (ft-bmp)-- to --
Casing
Diameter
(in.)
4 Well Casing
Material
Static Water
Level (ft-bmp)11.24 Total Depth (ft-bmp)16.38
Water
Column
(ft)
5.14 Gallons in
Well 3.34
Water Quality Meter
Make/Model YSI Pro Plus Purge Method Low-Flow Collection Type Grab
Sample Time 14:05
Purge Start 13:13
Purge End 13:59
Well Volumes
Purged
0.36
Gallons Purged 1.19
Total Purge Time
(h:m)
0:46
Sample ID MW-2-W-
20240903
Duplicate
ID
--
Purge
Equipment Peristaltic
Sample
Equipment
Peristaltic
Appearance
Time Rate
(ml/min)
Depth to
Water
(ft)
pH
(standard
units)
Conductivity
(mS/cm)
Turbidity
(NTU)
Dissolved
Oxygen
(mg/L)
Temperature
(°C)
Redox
(mV)Color Odor
13:18 200 11.24 6.96 2.76 46.7 0.23 21.00 53.5 Brown --
13:23 200 11.25 6.96 2.77 40.1 0.21 20.90 30.8 Brown --
13:28 200 11.25 6.97 2.77 30.9 0.19 20.70 6 Brown --
13:33 200 11.25 6.98 2.78 28.7 0.16 20.70 -3.1 Brown --
13:38 200 11.25 6.99 2.77 24.5 0.17 20.90 -11.8 Brown --
13:43 200 11.25 7.00 2.79 24.1 0.17 20.80 -16.3 Brown --
13:48 200 11.25 7.00 2.79 20.5 0.16 20.80 -24.3 Clear --
13:53 200 11.25 7.00 2.79 20.1 0.16 20.70 -27.1 Clear --
13:58 200 11.25 7.01 2.80 21.9 0.15 20.90 -28.9 Clear --
Comments:None
Well Casing Volume Conversion
Well diameter (in.) =
gallons per foot
1 = 0.04 1.5 = 0.09 2.5 = 0.26 3.5 = 0.50 6 = 1.47
1.25 = 0.06 2 = 0.16 3 = 0.37 4 = 0.65
Sample Information
Sample ID:MW-2-W-20240903 Sample Time:14:05 Sample Depth (ft-bmp)
(e.g. pump intake):15.5
Analytes and Methods:See Chain-of-Custody.Depth to Water at Time of
Sampling 11.25
ft-bmp = feet below measuring point mS/cm = milliSiemens per centimeter mV = millivolts
in. = inches NTU = Nephelometric Turbidity Unit °F = degrees Fahrenheit
ft = feet mg/L = milligrams per liter °C = degrees Celsius
mL/min = milliliters per minute PVC = Polyvinyl Chloride -- = Not Recorded
Chevron Groundwater Sampling Form
Project Number 30063823 Well ID MW-3 Date 9/3/2024
Site Location Ogden, Utah Site ID 71887 Weather
(°F)Clear Sampled by Bridger
Cherry
Measuring Point
Description Top of Casing Screen
Depth Interval (ft-bmp)-- to --
Casing
Diameter
(in.)
4 Well Casing
Material
Static Water
Level (ft-bmp)11.08 Total Depth (ft-bmp)16.85
Water
Column
(ft)
5.77 Gallons in
Well 3.75
Water Quality Meter
Make/Model YSI Pro Plus Purge Method Low-Flow Collection Type Grab
Sample Time 15:00
Purge Start 14:33
Purge End 14:55
Well Volumes
Purged
0.15
Gallons Purged 0.58
Total Purge Time
(h:m)
0:22
Sample ID MW-3-W-
20240903
Duplicate
ID
--
Purge
Equipment Peristaltic
Sample
Equipment
Peristaltic
Appearance
Time Rate
(ml/min)
Depth to
Water
(ft)
pH
(standard
units)
Conductivity
(mS/cm)
Turbidity
(NTU)
Dissolved
Oxygen
(mg/L)
Temperature
(°C)
Redox
(mV)Color Odor
14:38 100 11.09 6.83 2.68 2.3 0.34 24.40 -71.4 Clear --
14:43 100 11.09 6.84 2.68 1.9 0.17 24.30 -92.7 Clear --
14:48 100 11.09 6.85 2.68 1.9 0.19 24.10 -97.5 Clear --
14:53 100 11.09 6.86 2.67 1.5 0.16 24.00 -102.7 Clear --
Comments:None
Well Casing Volume Conversion
Well diameter (in.) =
gallons per foot
1 = 0.04 1.5 = 0.09 2.5 = 0.26 3.5 = 0.50 6 = 1.47
1.25 = 0.06 2 = 0.16 3 = 0.37 4 = 0.65
Sample Information
Sample ID:MW-3-W-20240903 Sample Time:15:00 Sample Depth (ft-bmp)
(e.g. pump intake):15.5
Analytes and Methods:See Chain-of-Custody.Depth to Water at Time of
Sampling 11.09
ft-bmp = feet below measuring point mS/cm = milliSiemens per centimeter mV = millivolts
in. = inches NTU = Nephelometric Turbidity Unit °F = degrees Fahrenheit
ft = feet mg/L = milligrams per liter °C = degrees Celsius
mL/min = milliliters per minute PVC = Polyvinyl Chloride -- = Not Recorded
Chevron Groundwater Sampling Form
Project Number 30063823 Well ID MW-25 Date 9/4/2024
Site Location Ogden, Utah Site ID 71887 Weather
(°F)Clear Sampled by Bridger
Cherry
Measuring Point
Description Top of Casing Screen
Depth Interval (ft-bmp)10 to 20
Casing
Diameter
(in.)
4 Well Casing
Material
Static Water
Level (ft-bmp)10.45 Total Depth (ft-bmp)19.9
Water
Column
(ft)
9.45 Gallons in
Well 6.14
Water Quality Meter
Make/Model YSI Pro Plus Purge Method Low-Flow Collection Type Grab
Sample Time 12:25
Purge Start 12:00
Purge End 12:20
Well Volumes
Purged
0.09
Gallons Purged 0.53
Total Purge Time
(h:m)
0:20
Sample ID MW-25-W-
20240904
Duplicate
ID
--
Purge
Equipment Peristaltic
Sample
Equipment
Peristaltic
Appearance
Time Rate
(ml/min)
Depth to
Water
(ft)
pH
(standard
units)
Conductivity
(mS/cm)
Turbidity
(NTU)
Dissolved
Oxygen
(mg/L)
Temperature
(°C)
Redox
(mV)Color Odor
12:05 100 10.5 7.00 2.32 4.7 0.45 20.30 -77.8 Clear --
12:10 100 10.49 6.99 2.32 4.0 0.27 20.90 -83.2 Clear --
12:15 100 10.49 6.99 2.31 3.6 0.22 20.70 -86.3 Clear --
12:20 100 10.49 6.99 2.31 3.7 0.22 20.70 -88.5 Clear --
Comments:None
Well Casing Volume Conversion
Well diameter (in.) =
gallons per foot
1 = 0.04 1.5 = 0.09 2.5 = 0.26 3.5 = 0.50 6 = 1.47
1.25 = 0.06 2 = 0.16 3 = 0.37 4 = 0.65
Sample Information
Sample ID:MW-25-W-20240904 Sample Time:12:25 Sample Depth (ft-bmp)
(e.g. pump intake):18.5
Analytes and Methods:See Chain-of-Custody.Depth to Water at Time of
Sampling 10.49
ft-bmp = feet below measuring point mS/cm = milliSiemens per centimeter mV = millivolts
in. = inches NTU = Nephelometric Turbidity Unit °F = degrees Fahrenheit
ft = feet mg/L = milligrams per liter °C = degrees Celsius
mL/min = milliliters per minute PVC = Polyvinyl Chloride -- = Not Recorded
Chevron Groundwater Sampling Form
Project Number 30063823 Well ID MW-26 Date 9/4/2024
Site Location Ogden, Utah Site ID 71887 Weather
(°F)Clear Sampled by Bridger
Cherry
Measuring Point
Description Top of Casing Screen
Depth Interval (ft-bmp)5 to 15
Casing
Diameter
(in.)
4 Well Casing
Material
Static Water
Level (ft-bmp)10.36 Total Depth (ft-bmp)20.13
Water
Column
(ft)
9.77 Gallons in
Well 6.35
Water Quality Meter
Make/Model YSI Pro Plus Purge Method Low-Flow Collection Type Grab
Sample Time 13:15
Purge Start 12:49
Purge End 13:11
Well Volumes
Purged
0.09
Gallons Purged 0.58
Total Purge Time
(h:m)
0:22
Sample ID MW-26-W-
20240904
Duplicate
ID
--
Purge
Equipment Peristaltic
Sample
Equipment
Peristaltic
Appearance
Time Rate
(ml/min)
Depth to
Water
(ft)
pH
(standard
units)
Conductivity
(mS/cm)
Turbidity
(NTU)
Dissolved
Oxygen
(mg/L)
Temperature
(°C)
Redox
(mV)Color Odor
12:54 100 10.43 7.11 2.31 3.1 0.29 21.80 -150.3 Clear --
12:59 100 10.43 7.11 2.32 3.5 0.23 21.50 -152.8 Clear --
13:04 100 10.43 7.11 2.30 3.4 0.20 21.80 -153.3 Clear --
13:09 100 10.42 7.11 2.31 2.8 0.18 21.50 -153.4 Clear --
Comments:None
Well Casing Volume Conversion
Well diameter (in.) =
gallons per foot
1 = 0.04 1.5 = 0.09 2.5 = 0.26 3.5 = 0.50 6 = 1.47
1.25 = 0.06 2 = 0.16 3 = 0.37 4 = 0.65
Sample Information
Sample ID:MW-26-W-20240904 Sample Time:13:15 Sample Depth (ft-bmp)
(e.g. pump intake):18.5
Analytes and Methods:See Chain-of-Custody.Depth to Water at Time of
Sampling 10.42
ft-bmp = feet below measuring point mS/cm = milliSiemens per centimeter mV = millivolts
in. = inches NTU = Nephelometric Turbidity Unit °F = degrees Fahrenheit
ft = feet mg/L = milligrams per liter °C = degrees Celsius
mL/min = milliliters per minute PVC = Polyvinyl Chloride -- = Not Recorded
Chevron Groundwater Sampling Form
Project Number 30063823 Well ID MW-27 Date 9/4/2024
Site Location Ogden, Utah Site ID 71887 Weather
(°F)Clear Sampled by Bridger
Cherry
Measuring Point
Description Top of Casing Screen
Depth Interval (ft-bmp)5 to 20
Casing
Diameter
(in.)
4 Well Casing
Material
Static Water
Level (ft-bmp)11.58 Total Depth (ft-bmp)19.64
Water
Column
(ft)
8.06 Gallons in
Well 5.24
Water Quality Meter
Make/Model YSI Pro Plus Purge Method Low-Flow Collection Type Grab
Sample Time 14:45
Purge Start 14:12
Purge End 14:37
Well Volumes
Purged
0.13
Gallons Purged 0.66
Total Purge Time
(h:m)
0:25
Sample ID MW-27-W-
20240904
Duplicate
ID
--
Purge
Equipment Peristaltic
Sample
Equipment
Peristaltic
Appearance
Time Rate
(ml/min)
Depth to
Water
(ft)
pH
(standard
units)
Conductivity
(mS/cm)
Turbidity
(NTU)
Dissolved
Oxygen
(mg/L)
Temperature
(°C)
Redox
(mV)Color Odor
14:17 100 11.63 7.19 2.03 3.9 0.91 21.00 31.6 Clear --
14:22 100 11.62 7.18 2.02 1.8 0.47 20.70 19.3 Clear --
14:27 100 11.63 7.18 1.99 1.8 0.36 20.50 11.6 Clear --
14:32 100 11.63 7.18 2.00 2.0 0.35 20.50 8.7 Clear --
14:37 100 11.63 7.20 1.98 1.6 0.38 20.70 5.8 Clear --
Comments:None
Well Casing Volume Conversion
Well diameter (in.) =
gallons per foot
1 = 0.04 1.5 = 0.09 2.5 = 0.26 3.5 = 0.50 6 = 1.47
1.25 = 0.06 2 = 0.16 3 = 0.37 4 = 0.65
Sample Information
Sample ID:MW-27-W-20240904 Sample Time:14:45 Sample Depth (ft-bmp)
(e.g. pump intake):18.5
Analytes and Methods:See Chain-of-Custody.Depth to Water at Time of
Sampling 11.63
ft-bmp = feet below measuring point mS/cm = milliSiemens per centimeter mV = millivolts
in. = inches NTU = Nephelometric Turbidity Unit °F = degrees Fahrenheit
ft = feet mg/L = milligrams per liter °C = degrees Celsius
mL/min = milliliters per minute PVC = Polyvinyl Chloride -- = Not Recorded
Chevron Groundwater Sampling Form
Project Number 30063823 Well ID MW-23 Date 9/4/2024
Site Location Ogden, Utah Site ID 71887 Weather
(°F)Clear Sampled by Bridger
Cherry
Measuring Point
Description Top of Casing Screen
Depth Interval (ft-bmp)10 to 20
Casing
Diameter
(in.)
4 Well Casing
Material
Static Water
Level (ft-bmp)11.23 Total Depth (ft-bmp)19.7
Water
Column
(ft)
8.47 Gallons in
Well 5.51
Water Quality Meter
Make/Model YSI Pro Plus Purge Method Low-Flow Collection Type Grab
Sample Time 15:50
Purge Start 15:22
Purge End 15:50
Well Volumes
Purged
0.13
Gallons Purged 0.74
Total Purge Time
(h:m)
0:28
Sample ID MW-23-W-
20240904
Duplicate
ID
--
Purge
Equipment Peristaltic
Sample
Equipment
Peristaltic
Appearance
Time Rate
(ml/min)
Depth to
Water
(ft)
pH
(standard
units)
Conductivity
(mS/cm)
Turbidity
(NTU)
Dissolved
Oxygen
(mg/L)
Temperature
(°C)
Redox
(mV)Color Odor
15:27 100 11.31 6.85 2.62 7.2 0.67 20.70 -94.8 Clear --
15:32 100 11.31 6.86 2.63 5.5 0.36 20.50 -116.5 Clear --
15:37 100 11.31 6.86 2.62 5.3 0.40 20.40 -123.4 Clear --
15:42 100 11.31 6.86 2.62 5.1 0.48 20.40 -128.5 Clear --
15:47 100 11.31 6.86 2.62 5.5 0.43 20.20 -130.1 Clear --
Comments:None
Well Casing Volume Conversion
Well diameter (in.) =
gallons per foot
1 = 0.04 1.5 = 0.09 2.5 = 0.26 3.5 = 0.50 6 = 1.47
1.25 = 0.06 2 = 0.16 3 = 0.37 4 = 0.65
Sample Information
Sample ID:MW-23-W-20240904 Sample Time:15:50 Sample Depth (ft-bmp)
(e.g. pump intake):19
Analytes and Methods:See Chain-of-Custody.Depth to Water at Time of
Sampling 11.31
ft-bmp = feet below measuring point mS/cm = milliSiemens per centimeter mV = millivolts
in. = inches NTU = Nephelometric Turbidity Unit °F = degrees Fahrenheit
ft = feet mg/L = milligrams per liter °C = degrees Celsius
mL/min = milliliters per minute PVC = Polyvinyl Chloride -- = Not Recorded
Chevron Groundwater Sampling Form
Project Number 30063823 Well ID MW-24 Date 9/4/2024
Site Location Ogden, Utah Site ID 71887 Weather
(°F)Clear Sampled by Bridger
Cherry
Measuring Point
Description Top of Casing Screen
Depth Interval (ft-bmp)10 to 20
Casing
Diameter
(in.)
4 Well Casing
Material
Static Water
Level (ft-bmp)11.78 Total Depth (ft-bmp)20.19
Water
Column
(ft)
8.41 Gallons in
Well 5.47
Water Quality Meter
Make/Model YSI Pro Plus Purge Method Low-Flow Collection Type Grab
Sample Time 16:45
Purge Start 16:22
Purge End 16:43
Well Volumes
Purged
0.10
Gallons Purged 0.55
Total Purge Time
(h:m)
0:21
Sample ID MW-24-W-
20240904
Duplicate
ID
--
Purge
Equipment Peristaltic
Sample
Equipment
Peristaltic
Appearance
Time Rate
(ml/min)
Depth to
Water
(ft)
pH
(standard
units)
Conductivity
(mS/cm)
Turbidity
(NTU)
Dissolved
Oxygen
(mg/L)
Temperature
(°C)
Redox
(mV)Color Odor
16:27 100 11.82 6.97 3.08 3.2 0.50 22.10 -152.2 Clear --
16:32 100 11.82 6.97 3.08 3.5 0.37 21.90 -155.6 Clear --
16:37 100 11.82 6.96 3.04 2.5 0.29 22.00 -154.3 Clear --
16:42 100 11.82 6.98 3.09 2.5 0.26 21.90 -156.5 Clear --
Comments:None
Well Casing Volume Conversion
Well diameter (in.) =
gallons per foot
1 = 0.04 1.5 = 0.09 2.5 = 0.26 3.5 = 0.50 6 = 1.47
1.25 = 0.06 2 = 0.16 3 = 0.37 4 = 0.65
Sample Information
Sample ID:MW-24-W-20240904 Sample Time:16:45 Sample Depth (ft-bmp)
(e.g. pump intake):18.5
Analytes and Methods:See Chain-of-Custody.Depth to Water at Time of
Sampling 11.82
ft-bmp = feet below measuring point mS/cm = milliSiemens per centimeter mV = millivolts
in. = inches NTU = Nephelometric Turbidity Unit °F = degrees Fahrenheit
ft = feet mg/L = milligrams per liter °C = degrees Celsius
mL/min = milliliters per minute PVC = Polyvinyl Chloride -- = Not Recorded
Chevron Groundwater Sampling Form
Project Number 30063823 Well ID MW-4 Date 9/4/2024
Site Location Ogden, Utah Site ID 71887 Weather
(°F)Clear Sampled by Bridger
Cherry
Measuring Point
Description Top of Casing Screen
Depth Interval (ft-bmp)-- to --
Casing
Diameter
(in.)
4 Well Casing
Material
Static Water
Level (ft-bmp)10.94 Total Depth (ft-bmp)14.55
Water
Column
(ft)
3.61 Gallons in
Well 2.35
Water Quality Meter
Make/Model YSI Pro Plus Purge Method Low-Flow Collection Type Grab
Sample Time 18:50
Purge Start 18:28
Purge End 18:49
Well Volumes
Purged
0.24
Gallons Purged 0.55
Total Purge Time
(h:m)
0:21
Sample ID MW-4-W-
20240904
Duplicate
ID
--
Purge
Equipment Peristaltic
Sample
Equipment
Peristaltic
Appearance
Time Rate
(ml/min)
Depth to
Water
(ft)
pH
(standard
units)
Conductivity
(mS/cm)
Turbidity
(NTU)
Dissolved
Oxygen
(mg/L)
Temperature
(°C)
Redox
(mV)Color Odor
18:33 100 11.14 6.71 2.71 2.5 0.49 24.10 -81.1 Clear --
18:38 100 11.19 6.71 2.71 2.2 0.40 24.00 -86.3 Clear --
18:43 100 11.22 6.70 2.71 1.6 0.36 24.10 -91.8 Clear --
18:48 100 11.27 6.70 2.72 1.5 0.30 23.80 -95.5 Clear --
Comments:None
Well Casing Volume Conversion
Well diameter (in.) =
gallons per foot
1 = 0.04 1.5 = 0.09 2.5 = 0.26 3.5 = 0.50 6 = 1.47
1.25 = 0.06 2 = 0.16 3 = 0.37 4 = 0.65
Sample Information
Sample ID:MW-4-W-20240904 Sample Time:18:50 Sample Depth (ft-bmp)
(e.g. pump intake):13.5
Analytes and Methods:See Chain-of-Custody.Depth to Water at Time of
Sampling 11.27
ft-bmp = feet below measuring point mS/cm = milliSiemens per centimeter mV = millivolts
in. = inches NTU = Nephelometric Turbidity Unit °F = degrees Fahrenheit
ft = feet mg/L = milligrams per liter °C = degrees Celsius
mL/min = milliliters per minute PVC = Polyvinyl Chloride -- = Not Recorded
Chevron Groundwater Sampling Form
Project Number 30063823 Well ID MW-11 Date 9/4/2024
Site Location Ogden, Utah Site ID 71887 Weather
(°F)Clear Sampled by Bridger
Cherry
Measuring Point
Description Top of Casing Screen
Depth Interval (ft-bmp)-- to --
Casing
Diameter
(in.)
4 Well Casing
Material
Static Water
Level (ft-bmp)11.29 Total Depth (ft-bmp)15.59
Water
Column
(ft)
4.3 Gallons in
Well 2.79
Water Quality Meter
Make/Model YSI Pro Plus Purge Method Low-Flow Collection Type Grab
Sample Time 09:20
Purge Start 08:55
Purge End 09:16
Well Volumes
Purged
0.20
Gallons Purged 0.55
Total Purge Time
(h:m)
0:21
Sample ID MW-11-W-
20240904
Duplicate
ID
DUP-01-W-
20240904
Purge
Equipment Peristaltic
Sample
Equipment
Peristaltic
Appearance
Time Rate
(ml/min)
Depth to
Water
(ft)
pH
(standard
units)
Conductivity
(mS/cm)
Turbidity
(NTU)
Dissolved
Oxygen
(mg/L)
Temperature
(°C)
Redox
(mV)Color Odor
09:00 100 11.5 6.94 3.71 5.1 1.29 19.60 34 Clear --
09:05 100 11.58 6.94 3.73 5.1 0.49 19.80 33.7 Clear --
09:10 100 11.65 6.93 3.72 5.3 0.34 19.80 35.3 Clear --
09:15 100 11.73 6.92 3.71 5.6 0.31 19.90 35.9 Clear --
Comments:Well vault needs replaced, recommend including a concrete pad
Well Casing Volume Conversion
Well diameter (in.) =
gallons per foot
1 = 0.04 1.5 = 0.09 2.5 = 0.26 3.5 = 0.50 6 = 1.47
1.25 = 0.06 2 = 0.16 3 = 0.37 4 = 0.65
Sample Information
Sample ID:MW-11-W-20240904 Sample Time:09:20 Sample Depth (ft-bmp)
(e.g. pump intake):14.5
Analytes and Methods:See Chain-of-Custody.Depth to Water at Time of
Sampling 11.75
ft-bmp = feet below measuring point mS/cm = milliSiemens per centimeter mV = millivolts
in. = inches NTU = Nephelometric Turbidity Unit °F = degrees Fahrenheit
ft = feet mg/L = milligrams per liter °C = degrees Celsius
mL/min = milliliters per minute PVC = Polyvinyl Chloride -- = Not Recorded
Well Inspection Log
Client:Chevron
Site ID:71887
Site Location:Ogden, Utah
Date(s):9/4/2024,9/3/2024
Inspector(s):Bridger Cherry
Well ID Date Easy to
Locate?
Area
Prone to
Flooding
?
Well
Type
Well
Housing/
Pad in
Good
Condition
?
Well Labels
Present
Outside
Well?
Well Labels
Present
Inside
Well?
Lock
Present
?
Lock
Functioning
?
Well
Locked at
Arrival?
Photos
Taken?
Comments
MW-11 09/04/2024 ------------------No --
MW-11 09/03/2024 ------------------No --
MW-2 09/03/2024 ------------------No --
MW-2 09/03/2024 ------------------No --
MW-23 09/03/2024 ------------------No --
MW-23 09/04/2024 ------------------No --
MW-24 09/03/2024 ------------------No --
MW-24 09/04/2024 ------------------No --
MW-25 09/03/2024 ------------------No --
MW-25 09/04/2024 ------------------No --
MW-26 09/03/2024 ------------------No --
MW-26 09/04/2024 ------------------No --
MW-27 09/03/2024 ------------------No --
MW-27 09/04/2024 ------------------No --
MW-3 09/03/2024 ------------------No --
MW-3 09/03/2024 ------------------No --
MW-4 09/03/2024 ------------------No --
MW-4 09/04/2024 ------------------No --
MW-6 09/03/2024 ------------------No --
MW-6 09/04/2024 ------------------No --
Well Inspection Log Photographs
Well ID Date Photo Comments
MW-11 09/03/2024 Well vault needs replaced, recommend
including a concrete pad

ATTACHMENT B

Laboratory Report and Chain-of-Custody Documentation

ANALYTICAL REPORT
October 03, 2024
Revised Report
Arcadis U.S., Inc. - Chevron - UT
Sample Delivery Group:L1775210
Samples Received:09/06/2024
Project Number:30063823 19.45
Description:71887
Site:2003 WASHINGTON BLVD OGDEN UT
Report To:Gerald Robinson
10 Exchange Place
Suite 112
Salt Lake City, UT 84111
Entire Report Reviewed By:
October 03, 2024
[Preliminary Report]
Brian Ford
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be
reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace
Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and
ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided,
and as the samples are received.
Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 mydata.pacelabs.com
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Arcadis U.S., Inc. - Chevron - UT 30063823 19.45 L1775210 10/03/24 14:00 1 of 38
October 03, 2024
Brian Ford
Project Manager
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TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 6
Sr: Sample Results 7
MW-2-W-20240903 L1775210-01 7
MW-3-W-20240903 L1775210-02 8
EB-1-W-20240903 L1775210-03 9
MW-11-W-20240904 L1775210-04 10
MW-25-W-20240904 L1775210-05 11
MW-26-W-20240904 L1775210-06 12
MW-27-W-20240904 L1775210-07 13
MW-23-W-20240904 L1775210-08 14
MW-24-W-20240904 L1775210-09 15
DUP-1-W-20240904 L1775210-10 16
MW-6-W-20240904 L1775210-11 17
MW-4-W-20240904 L1775210-12 18
DUP-2-W-20240904 L1775210-13 19
TRIP BLANK-20240904 L1775210-14 20
EB-2-W-20240904 L1775210-15 21
Qc: Quality Control Summary 22
Wet Chemistry by Method 2320 B-2011 22
Wet Chemistry by Method 300.0 24
Volatile Organic Compounds (GC) by Method 8015D/GRO 25
Volatile Organic Compounds (GC/MS) by Method 8260D 27
Semi-Volatile Organic Compounds (GC) by Method 8015D 32
Gl: Glossary of Terms 34
Al: Accreditations & Locations 35
Sc: Sample Chain of Custody 36
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-2-W-20240903 L1775210-01 GW Bridger Cherry 09/03/24 14:05 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358096 1 09/08/24 10:31 09/08/24 10:31 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 18:40 09/08/24 18:40 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2359893 1 09/10/24 22:30 09/10/24 22:30 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2359427 1 09/10/24 12:42 09/10/24 12:42 DWR Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/17/24 21:13 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/17/24 21:13 DMG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-3-W-20240903 L1775210-02 GW Bridger Cherry 09/03/24 15:00 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358096 1 09/08/24 10:36 09/08/24 10:36 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 19:34 09/08/24 19:34 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2359893 1 09/10/24 22:53 09/10/24 22:53 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2359427 1 09/10/24 13:01 09/10/24 13:01 DWR Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/17/24 21:33 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/18/24 19:00 AUU Mt. Juliet, TN
Collected by Collected date/time Received date/time
EB-1-W-20240903 L1775210-03 GW Bridger Cherry 09/03/24 16:00 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358262 1 09/08/24 10:03 09/08/24 10:03 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 20:14 09/08/24 20:14 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2359893 1 09/10/24 18:55 09/10/24 18:55 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2359427 1 09/10/24 11:46 09/10/24 11:46 DWR Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/17/24 21:53 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/17/24 21:53 DMG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-11-W-20240904 L1775210-04 GW Bridger Cherry 09/04/24 09:20 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358096 1 09/08/24 10:43 09/08/24 10:43 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 20:28 09/08/24 20:28 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2359893 1 09/10/24 23:17 09/10/24 23:17 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2359427 1 09/10/24 13:20 09/10/24 13:20 DWR Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/17/24 22:14 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/18/24 18:38 AUU Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-25-W-20240904 L1775210-05 GW Bridger Cherry 09/04/24 12:25 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358096 1 09/08/24 10:48 09/08/24 10:48 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 20:41 09/08/24 20:41 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2359893 1 09/10/24 23:40 09/10/24 23:40 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2359427 1 09/10/24 13:39 09/10/24 13:39 DWR Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/17/24 22:34 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/18/24 18:18 AUU Mt. Juliet, TN
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-26-W-20240904 L1775210-06 GW Bridger Cherry 09/04/24 13:15 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358096 1 09/08/24 10:53 09/08/24 10:53 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 20:55 09/08/24 20:55 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2359893 1 09/11/24 00:04 09/11/24 00:04 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2359427 1 09/10/24 13:57 09/10/24 13:57 DWR Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/17/24 22:54 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/18/24 17:57 AUU Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-27-W-20240904 L1775210-07 GW Bridger Cherry 09/04/24 14:45 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358096 1 09/08/24 10:59 09/08/24 10:59 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 21:08 09/08/24 21:08 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2359893 1 09/11/24 00:27 09/11/24 00:27 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2359482 1 09/10/24 17:07 09/10/24 17:07 KSD Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/17/24 23:14 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/17/24 23:14 DMG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-23-W-20240904 L1775210-08 GW Bridger Cherry 09/04/24 15:50 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358096 1 09/08/24 11:06 09/08/24 11:06 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 21:22 09/08/24 21:22 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2359893 1 09/11/24 00:51 09/11/24 00:51 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2359482 1 09/10/24 17:26 09/10/24 17:26 KSD Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2360735 1 09/12/24 06:58 09/12/24 06:58 DYW Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/17/24 23:34 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/18/24 17:37 AUU Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-24-W-20240904 L1775210-09 GW Bridger Cherry 09/04/24 16:45 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358096 1 09/08/24 11:13 09/08/24 11:13 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 22:02 09/08/24 22:02 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2360275 1 09/11/24 12:20 09/11/24 12:20 DWR Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2359482 1 09/10/24 17:45 09/10/24 17:45 KSD Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2360735 1 09/12/24 07:19 09/12/24 07:19 DYW Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/17/24 23:54 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/18/24 17:16 AUU Mt. Juliet, TN
Collected by Collected date/time Received date/time
DUP-1-W-20240904 L1775210-10 GW Bridger Cherry 09/04/24 00:00 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358096 1 09/08/24 11:18 09/08/24 11:18 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 22:16 09/08/24 22:16 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2360275 1 09/11/24 12:44 09/11/24 12:44 DWR Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2360363 1 09/11/24 19:12 09/11/24 19:12 ACG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/18/24 15:32 AUU Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/18/24 15:53 AUU Mt. Juliet, TN
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-6-W-20240904 L1775210-11 GW Bridger Cherry 09/04/24 17:50 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358096 1 09/08/24 11:51 09/08/24 11:51 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 22:29 09/08/24 22:29 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2360275 1 09/11/24 13:08 09/11/24 13:08 DWR Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2360363 1 09/11/24 19:31 09/11/24 19:31 ACG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/18/24 00:35 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/18/24 16:55 AUU Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-4-W-20240904 L1775210-12 GW Bridger Cherry 09/04/24 18:50 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358096 1 09/08/24 11:55 09/08/24 11:55 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 22:43 09/08/24 22:43 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2360275 1 09/11/24 13:32 09/11/24 13:32 DWR Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2360363 1 09/11/24 19:50 09/11/24 19:50 ACG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/18/24 00:55 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/18/24 16:35 AUU Mt. Juliet, TN
Collected by Collected date/time Received date/time
DUP-2-W-20240904 L1775210-13 GW Bridger Cherry 09/04/24 00:00 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358096 1 09/08/24 12:00 09/08/24 12:00 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 22:56 09/08/24 22:56 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2360275 1 09/11/24 13:56 09/11/24 13:56 DWR Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2360363 1 09/11/24 20:09 09/11/24 20:09 ACG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/18/24 01:15 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/18/24 16:14 AUU Mt. Juliet, TN
Collected by Collected date/time Received date/time
TRIP BLANK-20240904 L1775210-14 GW Bridger Cherry 09/04/24 00:00 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 8260D WG2362424 1 09/13/24 21:58 09/13/24 21:58 JAH Mt. Juliet, TN
Collected by Collected date/time Received date/time
EB-2-W-20240904 L1775210-15 GW Bridger Cherry 09/04/24 19:15 09/06/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Wet Chemistry by Method 2320 B-2011 WG2358262 1 09/08/24 10:06 09/08/24 10:06 BJM Mt. Juliet, TN
Wet Chemistry by Method 300.0 WG2358072 1 09/08/24 23:10 09/08/24 23:10 DLH Mt. Juliet, TN
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2360275 1 09/11/24 11:32 09/11/24 11:32 DWR Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D WG2362424 1 09/13/24 22:40 09/13/24 22:40 JAH Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361730 1 09/17/24 08:17 09/18/24 01:35 DMG Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015D WG2361732 1 09/17/24 08:20 09/18/24 01:35 DMG Mt. Juliet, TN
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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CASE NARRATIVE
All sample aliquots were received at the correct temperature, in the proper containers, with the
appropriate preservatives, and within method specified holding times, unless qualified or notated within
the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples
have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control
are within established criteria except where addressed in this case narrative, a non-conformance form
or properly qualified within the sample results. By my digital signature below, I affirm to the best of my
knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the
quality of the data have been identified by the laboratory, and no information or data have been
knowingly withheld that would affect the quality of the data.
[Preliminary Report]
Brian Ford
Project Manager
Report Revision History
Level II Report - Version 1: 09/19/24 16:34
Project Narrative
revised: corrected L1775210-11/-12 sample IDs.
Sample Delivery Group (SDG) Narrative
pH outside of method requirement.
Lab Sample ID Project Sample ID Method
L1775210-04 MW-11-W-20240904 8015D
L1775210-06 MW-26-W-20240904 8015D
L1775210-08 MW-23-W-20240904 8015D
L1775210-09 MW-24-W-20240904 8015D
L1775210-10 DUP-1-W-20240904 8015D
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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Brian Ford
Project Manager
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SAMPLE RESULTS - 01
L1775210
MW-2-W-20240903
Collected date/time: 09/03/24 14:05
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity 468 8.45 20.0 1 09/08/2024 10:31 WG2358096
Sample Narrative:
L1775210-01 WG2358096: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 91.5 J6 0.637 5.00 1 09/08/2024 18:40 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 0.0477 B J 0.0314 0.100 1 09/10/2024 22:30 WG2359893
(S)
a,a,a-Trifluorotoluene(FID)94.3 78.0-120 09/10/2024 22:30 WG2359893
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene U 0.0000941 0.00100 1 09/10/2024 12:42 WG2359427
Toluene U 0.000278 0.00100 1 09/10/2024 12:42 WG2359427
Ethylbenzene U 0.000137 0.00100 1 09/10/2024 12:42 WG2359427
Total Xylenes U 0.000174 0.00300 1 09/10/2024 12:42 WG2359427
Methyl tert-butyl ether U 0.000101 0.00100 1 09/10/2024 12:42 WG2359427
Naphthalene U C3 0.00100 0.00500 1 09/10/2024 12:42 WG2359427
(S) Toluene-d8 86.9 80.0-120 09/10/2024 12:42 WG2359427
(S) 4-Bromofluorobenzene 107 77.0-126 09/10/2024 12:42 WG2359427
(S) 1,2-Dichloroethane-d4 93.4 70.0-130 09/10/2024 12:42 WG2359427
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.0633 J 0.0247 0.100 1 09/17/2024 21:13 WG2361732
TPH (GC/FID) High Fraction 0.0633 J 0.0247 0.100 1 09/17/2024 21:13 WG2361730
(S) o-Terphenyl 91.6 52.0-156 09/17/2024 21:13 WG2361730
(S) o-Terphenyl 91.6 52.0-156 09/17/2024 21:13 WG2361732
Sample Narrative:
L1775210-01 WG2361732: Reporting from non-silica gel data due to non-detect to the RDL.
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 02
L1775210
MW-3-W-20240903
Collected date/time: 09/03/24 15:00
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity 554 8.45 20.0 1 09/08/2024 10:36 WG2358096
Sample Narrative:
L1775210-02 WG2358096: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 78.4 J6 0.637 5.00 1 09/08/2024 19:34 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 0.0890 B J 0.0314 0.100 1 09/10/2024 22:53 WG2359893
(S)
a,a,a-Trifluorotoluene(FID)94.6 78.0-120 09/10/2024 22:53 WG2359893
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene U 0.0000941 0.00100 1 09/10/2024 13:01 WG2359427
Toluene U 0.000278 0.00100 1 09/10/2024 13:01 WG2359427
Ethylbenzene U 0.000137 0.00100 1 09/10/2024 13:01 WG2359427
Total Xylenes U 0.000174 0.00300 1 09/10/2024 13:01 WG2359427
Methyl tert-butyl ether U 0.000101 0.00100 1 09/10/2024 13:01 WG2359427
Naphthalene U C3 0.00100 0.00500 1 09/10/2024 13:01 WG2359427
(S) Toluene-d8 86.4 80.0-120 09/10/2024 13:01 WG2359427
(S) 4-Bromofluorobenzene 108 77.0-126 09/10/2024 13:01 WG2359427
(S) 1,2-Dichloroethane-d4 91.7 70.0-130 09/10/2024 13:01 WG2359427
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.106 B 0.0247 0.100 1 09/18/2024 19:00 WG2361732
TPH (GC/FID) High Fraction 0.384 0.0247 0.100 1 09/17/2024 21:33 WG2361730
(S) o-Terphenyl 90.5 52.0-156 09/17/2024 21:33 WG2361730
(S) o-Terphenyl 75.8 52.0-156 09/18/2024 19:00 WG2361732
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 03
L1775210
EB-1-W-20240903
Collected date/time: 09/03/24 16:00
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity U 8.45 20.0 1 09/08/2024 10:03 WG2358262
Sample Narrative:
L1775210-03 WG2358262: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 0.836 J 0.637 5.00 1 09/08/2024 20:14 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 0.0525 B J 0.0314 0.100 1 09/10/2024 18:55 WG2359893
(S)
a,a,a-Trifluorotoluene(FID)94.9 78.0-120 09/10/2024 18:55 WG2359893
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene U 0.0000941 0.00100 1 09/10/2024 11:46 WG2359427
Toluene U 0.000278 0.00100 1 09/10/2024 11:46 WG2359427
Ethylbenzene U 0.000137 0.00100 1 09/10/2024 11:46 WG2359427
Total Xylenes U 0.000174 0.00300 1 09/10/2024 11:46 WG2359427
Methyl tert-butyl ether U 0.000101 0.00100 1 09/10/2024 11:46 WG2359427
Naphthalene U C3 0.00100 0.00500 1 09/10/2024 11:46 WG2359427
(S) Toluene-d8 87.8 80.0-120 09/10/2024 11:46 WG2359427
(S) 4-Bromofluorobenzene 108 77.0-126 09/10/2024 11:46 WG2359427
(S) 1,2-Dichloroethane-d4 101 70.0-130 09/10/2024 11:46 WG2359427
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.0598 J 0.0247 0.100 1 09/17/2024 21:53 WG2361732
TPH (GC/FID) High Fraction 0.0599 J 0.0247 0.100 1 09/17/2024 21:53 WG2361730
(S) o-Terphenyl 96.3 52.0-156 09/17/2024 21:53 WG2361730
(S) o-Terphenyl 96.8 52.0-156 09/17/2024 21:53 WG2361732
Sample Narrative:
L1775210-03 WG2361732: Reporting from non-silica gel data due to non-detect to the RDL.
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 04
L1775210
MW-11-W-20240904
Collected date/time: 09/04/24 09:20
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity 740 8.45 20.0 1 09/08/2024 10:43 WG2358096
Sample Narrative:
L1775210-04 WG2358096: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 43.7 0.637 5.00 1 09/08/2024 20:28 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 0.0588 B J 0.0314 0.100 1 09/10/2024 23:17 WG2359893
(S)
a,a,a-Trifluorotoluene(FID)94.0 78.0-120 09/10/2024 23:17 WG2359893
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene U 0.0000941 0.00100 1 09/10/2024 13:20 WG2359427
Toluene U 0.000278 0.00100 1 09/10/2024 13:20 WG2359427
Ethylbenzene U 0.000137 0.00100 1 09/10/2024 13:20 WG2359427
Total Xylenes U 0.000174 0.00300 1 09/10/2024 13:20 WG2359427
Methyl tert-butyl ether U 0.000101 0.00100 1 09/10/2024 13:20 WG2359427
Naphthalene U C3 0.00100 0.00500 1 09/10/2024 13:20 WG2359427
(S) Toluene-d8 86.0 80.0-120 09/10/2024 13:20 WG2359427
(S) 4-Bromofluorobenzene 105 77.0-126 09/10/2024 13:20 WG2359427
(S) 1,2-Dichloroethane-d4 93.4 70.0-130 09/10/2024 13:20 WG2359427
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.0591 B J 0.0247 0.100 1 09/18/2024 18:38 WG2361732
TPH (GC/FID) High Fraction 0.179 0.0247 0.100 1 09/17/2024 22:14 WG2361730
(S) o-Terphenyl 91.1 52.0-156 09/17/2024 22:14 WG2361730
(S) o-Terphenyl 84.2 52.0-156 09/18/2024 18:38 WG2361732
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 05
L1775210
MW-25-W-20240904
Collected date/time: 09/04/24 12:25
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity 533 8.45 20.0 1 09/08/2024 10:48 WG2358096
Sample Narrative:
L1775210-05 WG2358096: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 41.3 0.637 5.00 1 09/08/2024 20:41 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 0.246 B 0.0314 0.100 1 09/10/2024 23:40 WG2359893
(S)
a,a,a-Trifluorotoluene(FID)94.9 78.0-120 09/10/2024 23:40 WG2359893
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene U 0.0000941 0.00100 1 09/10/2024 13:39 WG2359427
Toluene U 0.000278 0.00100 1 09/10/2024 13:39 WG2359427
Ethylbenzene U 0.000137 0.00100 1 09/10/2024 13:39 WG2359427
Total Xylenes U 0.000174 0.00300 1 09/10/2024 13:39 WG2359427
Methyl tert-butyl ether U 0.000101 0.00100 1 09/10/2024 13:39 WG2359427
Naphthalene U C3 0.00100 0.00500 1 09/10/2024 13:39 WG2359427
(S) Toluene-d8 86.8 80.0-120 09/10/2024 13:39 WG2359427
(S) 4-Bromofluorobenzene 104 77.0-126 09/10/2024 13:39 WG2359427
(S) 1,2-Dichloroethane-d4 91.0 70.0-130 09/10/2024 13:39 WG2359427
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.0567 B J 0.0247 0.100 1 09/18/2024 18:18 WG2361732
TPH (GC/FID) High Fraction 0.205 0.0247 0.100 1 09/17/2024 22:34 WG2361730
(S) o-Terphenyl 93.7 52.0-156 09/17/2024 22:34 WG2361730
(S) o-Terphenyl 76.8 52.0-156 09/18/2024 18:18 WG2361732
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 06
L1775210
MW-26-W-20240904
Collected date/time: 09/04/24 13:15
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity 540 8.45 20.0 1 09/08/2024 10:53 WG2358096
Sample Narrative:
L1775210-06 WG2358096: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 51.6 0.637 5.00 1 09/08/2024 20:55 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 0.110 B 0.0314 0.100 1 09/11/2024 00:04 WG2359893
(S)
a,a,a-Trifluorotoluene(FID)95.7 78.0-120 09/11/2024 00:04 WG2359893
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene U 0.0000941 0.00100 1 09/10/2024 13:57 WG2359427
Toluene U 0.000278 0.00100 1 09/10/2024 13:57 WG2359427
Ethylbenzene U 0.000137 0.00100 1 09/10/2024 13:57 WG2359427
Total Xylenes U 0.000174 0.00300 1 09/10/2024 13:57 WG2359427
Methyl tert-butyl ether U 0.000101 0.00100 1 09/10/2024 13:57 WG2359427
Naphthalene U C3 0.00100 0.00500 1 09/10/2024 13:57 WG2359427
(S) Toluene-d8 86.3 80.0-120 09/10/2024 13:57 WG2359427
(S) 4-Bromofluorobenzene 105 77.0-126 09/10/2024 13:57 WG2359427
(S) 1,2-Dichloroethane-d4 94.8 70.0-130 09/10/2024 13:57 WG2359427
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.0621 B J 0.0247 0.100 1 09/18/2024 17:57 WG2361732
TPH (GC/FID) High Fraction 0.144 0.0247 0.100 1 09/17/2024 22:54 WG2361730
(S) o-Terphenyl 91.6 52.0-156 09/17/2024 22:54 WG2361730
(S) o-Terphenyl 80.0 52.0-156 09/18/2024 17:57 WG2361732
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 07
L1775210
MW-27-W-20240904
Collected date/time: 09/04/24 14:45
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity 438 8.45 20.0 1 09/08/2024 10:59 WG2358096
Sample Narrative:
L1775210-07 WG2358096: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 73.2 0.637 5.00 1 09/08/2024 21:08 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 0.0461 B J 0.0314 0.100 1 09/11/2024 00:27 WG2359893
(S)
a,a,a-Trifluorotoluene(FID)94.5 78.0-120 09/11/2024 00:27 WG2359893
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene U 0.0000941 0.00100 1 09/10/2024 17:07 WG2359482
Toluene U 0.000278 0.00100 1 09/10/2024 17:07 WG2359482
Ethylbenzene U 0.000137 0.00100 1 09/10/2024 17:07 WG2359482
Total Xylenes U 0.000174 0.00300 1 09/10/2024 17:07 WG2359482
Methyl tert-butyl ether U 0.000101 0.00100 1 09/10/2024 17:07 WG2359482
Naphthalene U 0.00100 0.00500 1 09/10/2024 17:07 WG2359482
(S) Toluene-d8 91.3 80.0-120 09/10/2024 17:07 WG2359482
(S) 4-Bromofluorobenzene 94.6 77.0-126 09/10/2024 17:07 WG2359482
(S) 1,2-Dichloroethane-d4 90.1 70.0-130 09/10/2024 17:07 WG2359482
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.0604 J 0.0247 0.100 1 09/17/2024 23:14 WG2361732
TPH (GC/FID) High Fraction 0.0604 J 0.0247 0.100 1 09/17/2024 23:14 WG2361730
(S) o-Terphenyl 92.6 52.0-156 09/17/2024 23:14 WG2361730
(S) o-Terphenyl 92.6 52.0-156 09/17/2024 23:14 WG2361732
Sample Narrative:
L1775210-07 WG2361732: Reporting from non-silica gel data due to non-detect to the RDL.
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 08
L1775210
MW-23-W-20240904
Collected date/time: 09/04/24 15:50
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity 591 8.45 20.0 1 09/08/2024 11:06 WG2358096
Sample Narrative:
L1775210-08 WG2358096: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 3.56 J 0.637 5.00 1 09/08/2024 21:22 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 3.36 0.0314 0.100 1 09/11/2024 00:51 WG2359893
(S)
a,a,a-Trifluorotoluene(FID)120 78.0-120 09/11/2024 00:51 WG2359893
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene 0.0262 0.0000941 0.00100 1 09/12/2024 06:58 WG2360735
Toluene 0.00221 0.000278 0.00100 1 09/10/2024 17:26 WG2359482
Ethylbenzene 0.00260 0.000137 0.00100 1 09/10/2024 17:26 WG2359482
Total Xylenes 0.0186 0.000174 0.00300 1 09/10/2024 17:26 WG2359482
Methyl tert-butyl ether U 0.000101 0.00100 1 09/10/2024 17:26 WG2359482
Naphthalene 0.0426 0.00100 0.00500 1 09/10/2024 17:26 WG2359482
(S) Toluene-d8 87.4 80.0-120 09/10/2024 17:26 WG2359482
(S) Toluene-d8 105 80.0-120 09/12/2024 06:58 WG2360735
(S) 4-Bromofluorobenzene 91.8 77.0-126 09/10/2024 17:26 WG2359482
(S) 4-Bromofluorobenzene 102 77.0-126 09/12/2024 06:58 WG2360735
(S) 1,2-Dichloroethane-d4 96.0 70.0-130 09/10/2024 17:26 WG2359482
(S) 1,2-Dichloroethane-d4 109 70.0-130 09/12/2024 06:58 WG2360735
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.624 B 0.0247 0.100 1 09/18/2024 17:37 WG2361732
TPH (GC/FID) High Fraction 0.899 0.0247 0.100 1 09/17/2024 23:34 WG2361730
(S) o-Terphenyl 93.7 52.0-156 09/17/2024 23:34 WG2361730
(S) o-Terphenyl 90.0 52.0-156 09/18/2024 17:37 WG2361732
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 09
L1775210
MW-24-W-20240904
Collected date/time: 09/04/24 16:45
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity 575 8.45 20.0 1 09/08/2024 11:13 WG2358096
Sample Narrative:
L1775210-09 WG2358096: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 10.8 0.637 5.00 1 09/08/2024 22:02 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 2.31 0.0314 0.100 1 09/11/2024 12:20 WG2360275
(S)
a,a,a-Trifluorotoluene(FID)114 78.0-120 09/11/2024 12:20 WG2360275
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene 0.0173 0.0000941 0.00100 1 09/12/2024 07:19 WG2360735
Toluene 0.00225 0.000278 0.00100 1 09/10/2024 17:45 WG2359482
Ethylbenzene 0.00311 0.000137 0.00100 1 09/10/2024 17:45 WG2359482
Total Xylenes 0.00517 0.000174 0.00300 1 09/10/2024 17:45 WG2359482
Methyl tert-butyl ether U 0.000101 0.00100 1 09/10/2024 17:45 WG2359482
Naphthalene 0.0130 0.00100 0.00500 1 09/10/2024 17:45 WG2359482
(S) Toluene-d8 91.1 80.0-120 09/10/2024 17:45 WG2359482
(S) Toluene-d8 97.9 80.0-120 09/12/2024 07:19 WG2360735
(S) 4-Bromofluorobenzene 97.6 77.0-126 09/10/2024 17:45 WG2359482
(S) 4-Bromofluorobenzene 96.8 77.0-126 09/12/2024 07:19 WG2360735
(S) 1,2-Dichloroethane-d4 99.4 70.0-130 09/10/2024 17:45 WG2359482
(S) 1,2-Dichloroethane-d4 110 70.0-130 09/12/2024 07:19 WG2360735
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.593 B 0.0247 0.100 1 09/18/2024 17:16 WG2361732
TPH (GC/FID) High Fraction 1.49 0.0247 0.100 1 09/17/2024 23:54 WG2361730
(S) o-Terphenyl 94.7 52.0-156 09/17/2024 23:54 WG2361730
(S) o-Terphenyl 94.7 52.0-156 09/18/2024 17:16 WG2361732
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE RESULTS - 10
L1775210
DUP-1-W-20240904
Collected date/time: 09/04/24 00:00
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity 740 8.45 20.0 1 09/08/2024 11:18 WG2358096
Sample Narrative:
L1775210-10 WG2358096: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 10.6 0.637 5.00 1 09/08/2024 22:16 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 0.0653 B J 0.0314 0.100 1 09/11/2024 12:44 WG2360275
(S)
a,a,a-Trifluorotoluene(FID)94.8 78.0-120 09/11/2024 12:44 WG2360275
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene U 0.0000941 0.00100 1 09/11/2024 19:12 WG2360363
Toluene U 0.000278 0.00100 1 09/11/2024 19:12 WG2360363
Ethylbenzene U 0.000137 0.00100 1 09/11/2024 19:12 WG2360363
Total Xylenes U 0.000174 0.00300 1 09/11/2024 19:12 WG2360363
Methyl tert-butyl ether U 0.000101 0.00100 1 09/11/2024 19:12 WG2360363
Naphthalene U 0.00100 0.00500 1 09/11/2024 19:12 WG2360363
(S) Toluene-d8 96.3 80.0-120 09/11/2024 19:12 WG2360363
(S) 4-Bromofluorobenzene 102 77.0-126 09/11/2024 19:12 WG2360363
(S) 1,2-Dichloroethane-d4 97.3 70.0-130 09/11/2024 19:12 WG2360363
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.254 B 0.0247 0.100 1 09/18/2024 15:53 WG2361732
TPH (GC/FID) High Fraction 0.195 0.0247 0.100 1 09/18/2024 15:32 WG2361730
(S) o-Terphenyl 81.6 52.0-156 09/18/2024 15:32 WG2361730
(S) o-Terphenyl 82.1 52.0-156 09/18/2024 15:53 WG2361732
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 11
L1775210
MW-6-W-20240904
Collected date/time: 09/04/24 17:50
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity 621 8.45 20.0 1 09/08/2024 11:51 WG2358096
Sample Narrative:
L1775210-11 WG2358096: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 16.6 0.637 5.00 1 09/08/2024 22:29 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 1.09 0.0314 0.100 1 09/11/2024 13:08 WG2360275
(S)
a,a,a-Trifluorotoluene(FID)94.3 78.0-120 09/11/2024 13:08 WG2360275
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene 0.184 0.0000941 0.00100 1 09/11/2024 19:31 WG2360363
Toluene 0.00217 0.000278 0.00100 1 09/11/2024 19:31 WG2360363
Ethylbenzene 0.000437 J 0.000137 0.00100 1 09/11/2024 19:31 WG2360363
Total Xylenes 0.00359 0.000174 0.00300 1 09/11/2024 19:31 WG2360363
Methyl tert-butyl ether U 0.000101 0.00100 1 09/11/2024 19:31 WG2360363
Naphthalene 0.00179 J 0.00100 0.00500 1 09/11/2024 19:31 WG2360363
(S) Toluene-d8 93.8 80.0-120 09/11/2024 19:31 WG2360363
(S) 4-Bromofluorobenzene 96.1 77.0-126 09/11/2024 19:31 WG2360363
(S) 1,2-Dichloroethane-d4 90.3 70.0-130 09/11/2024 19:31 WG2360363
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.388 B 0.0247 0.100 1 09/18/2024 16:55 WG2361732
TPH (GC/FID) High Fraction 0.601 0.0247 0.100 1 09/18/2024 00:35 WG2361730
(S) o-Terphenyl 95.8 52.0-156 09/18/2024 00:35 WG2361730
(S) o-Terphenyl 93.2 52.0-156 09/18/2024 16:55 WG2361732
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 12
L1775210
MW-4-W-20240904
Collected date/time: 09/04/24 18:50
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity 613 8.45 20.0 1 09/08/2024 11:55 WG2358096
Sample Narrative:
L1775210-12 WG2358096: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 2.91 J 0.637 5.00 1 09/08/2024 22:43 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 0.798 B 0.0314 0.100 1 09/11/2024 13:32 WG2360275
(S)
a,a,a-Trifluorotoluene(FID)99.8 78.0-120 09/11/2024 13:32 WG2360275
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene 0.00411 0.0000941 0.00100 1 09/11/2024 19:50 WG2360363
Toluene 0.00158 0.000278 0.00100 1 09/11/2024 19:50 WG2360363
Ethylbenzene 0.000665 J 0.000137 0.00100 1 09/11/2024 19:50 WG2360363
Total Xylenes 0.00368 0.000174 0.00300 1 09/11/2024 19:50 WG2360363
Methyl tert-butyl ether U 0.000101 0.00100 1 09/11/2024 19:50 WG2360363
Naphthalene 0.00111 J 0.00100 0.00500 1 09/11/2024 19:50 WG2360363
(S) Toluene-d8 91.3 80.0-120 09/11/2024 19:50 WG2360363
(S) 4-Bromofluorobenzene 95.6 77.0-126 09/11/2024 19:50 WG2360363
(S) 1,2-Dichloroethane-d4 91.1 70.0-130 09/11/2024 19:50 WG2360363
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.315 B 0.0247 0.100 1 09/18/2024 16:35 WG2361732
TPH (GC/FID) High Fraction 2.76 0.0247 0.100 1 09/18/2024 00:55 WG2361730
(S) o-Terphenyl 97.9 52.0-156 09/18/2024 00:55 WG2361730
(S) o-Terphenyl 92.1 52.0-156 09/18/2024 16:35 WG2361732
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 13
L1775210
DUP-2-W-20240904
Collected date/time: 09/04/24 00:00
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity 636 8.45 20.0 1 09/08/2024 12:00 WG2358096
Sample Narrative:
L1775210-13 WG2358096: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 14.2 0.637 5.00 1 09/08/2024 22:56 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 1.01 0.0314 0.100 1 09/11/2024 13:56 WG2360275
(S)
a,a,a-Trifluorotoluene(FID)95.9 78.0-120 09/11/2024 13:56 WG2360275
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene 0.170 0.0000941 0.00100 1 09/11/2024 20:09 WG2360363
Toluene 0.00197 0.000278 0.00100 1 09/11/2024 20:09 WG2360363
Ethylbenzene 0.000375 J 0.000137 0.00100 1 09/11/2024 20:09 WG2360363
Total Xylenes 0.00331 0.000174 0.00300 1 09/11/2024 20:09 WG2360363
Methyl tert-butyl ether U 0.000101 0.00100 1 09/11/2024 20:09 WG2360363
Naphthalene 0.00153 J 0.00100 0.00500 1 09/11/2024 20:09 WG2360363
(S) Toluene-d8 93.6 80.0-120 09/11/2024 20:09 WG2360363
(S) 4-Bromofluorobenzene 97.7 77.0-126 09/11/2024 20:09 WG2360363
(S) 1,2-Dichloroethane-d4 85.8 70.0-130 09/11/2024 20:09 WG2360363
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT 0.378 B 0.0247 0.100 1 09/18/2024 16:14 WG2361732
TPH (GC/FID) High Fraction 0.589 0.0247 0.100 1 09/18/2024 01:15 WG2361730
(S) o-Terphenyl 94.2 52.0-156 09/18/2024 01:15 WG2361730
(S) o-Terphenyl 98.4 52.0-156 09/18/2024 16:14 WG2361732
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 14
L1775210
TRIP BLANK-20240904
Collected date/time: 09/04/24 00:00
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene U 0.0000941 0.00100 1 09/13/2024 21:58 WG2362424
Toluene U 0.000278 0.00100 1 09/13/2024 21:58 WG2362424
Ethylbenzene U 0.000137 0.00100 1 09/13/2024 21:58 WG2362424
Total Xylenes U 0.000174 0.00300 1 09/13/2024 21:58 WG2362424
Methyl tert-butyl ether U 0.000101 0.00100 1 09/13/2024 21:58 WG2362424
Naphthalene U 0.00100 0.00500 1 09/13/2024 21:58 WG2362424
(S) Toluene-d8 111 80.0-120 09/13/2024 21:58 WG2362424
(S) 4-Bromofluorobenzene 104 77.0-126 09/13/2024 21:58 WG2362424
(S) 1,2-Dichloroethane-d4 110 70.0-130 09/13/2024 21:58 WG2362424
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 15
L1775210
EB-2-W-20240904
Collected date/time: 09/04/24 19:15
Wet Chemistry by Method 2320 B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Alkalinity U 8.45 20.0 1 09/08/2024 10:06 WG2358262
Sample Narrative:
L1775210-15 WG2358262: Endpoint pH 4.5 Headspace
Wet Chemistry by Method 300.0
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Sulfate 0.905 J 0.637 5.00 1 09/08/2024 23:10 WG2358072
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
TPH (GC/FID) Low Fraction 0.0897 B J 0.0314 0.100 1 09/11/2024 11:32 WG2360275
(S)
a,a,a-Trifluorotoluene(FID)94.0 78.0-120 09/11/2024 11:32 WG2360275
Volatile Organic Compounds (GC/MS) by Method 8260D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Benzene U 0.0000941 0.00100 1 09/13/2024 22:40 WG2362424
Toluene U 0.000278 0.00100 1 09/13/2024 22:40 WG2362424
Ethylbenzene U 0.000137 0.00100 1 09/13/2024 22:40 WG2362424
Total Xylenes U 0.000174 0.00300 1 09/13/2024 22:40 WG2362424
Methyl tert-butyl ether U 0.000101 0.00100 1 09/13/2024 22:40 WG2362424
Naphthalene U 0.00100 0.00500 1 09/13/2024 22:40 WG2362424
(S) Toluene-d8 111 80.0-120 09/13/2024 22:40 WG2362424
(S) 4-Bromofluorobenzene 105 77.0-126 09/13/2024 22:40 WG2362424
(S) 1,2-Dichloroethane-d4 111 70.0-130 09/13/2024 22:40 WG2362424
Semi-Volatile Organic Compounds (GC) by Method 8015D
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
DRO w/ SGT U 0.0247 0.100 1 09/18/2024 01:35 WG2361732
TPH (GC/FID) High Fraction U 0.0247 0.100 1 09/18/2024 01:35 WG2361730
(S) o-Terphenyl 90.5 52.0-156 09/18/2024 01:35 WG2361730
(S) o-Terphenyl 90.5 52.0-156 09/18/2024 01:35 WG2361732
Sample Narrative:
L1775210-15 WG2361732: Reporting from non-silica gel data due to non-detect to the RDL.
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2358096
Wet Chemistry by Method 2320 B-2011 L1775210-01,02,04,05,06,07,08,09,10,11,12,13
Method Blank (MB)
(MB) R4116942-2 09/08/24 09:36
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Alkalinity U 8.45 20.0
Sample Narrative:
BLANK: Endpoint pH 4.5
L1774991-01 Original Sample (OS) • Duplicate (DUP)
(OS) L1774991-01 09/08/24 09:43 • (DUP) R4116942-3 09/08/24 09:50
Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD
Limits
Analyte mg/l mg/l %%
Alkalinity 124 122 1 1.40 20
Sample Narrative:
OS: Endpoint pH 4.5 Headspace
DUP: Endpoint pH 4.5
L1775270-01 Original Sample (OS) • Duplicate (DUP)
(OS) L1775270-01 09/08/24 11:40 • (DUP) R4116942-4 09/08/24 11:45
Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD
Limits
Analyte mg/l mg/l %%
Alkalinity 97.3 97.9 1 0.572 20
Sample Narrative:
OS: Endpoint pH 4.5 Headspace
DUP: Endpoint pH 4.5
Laboratory Control Sample (LCS)
(LCS) R4116942-1 09/08/24 09:29
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte mg/l mg/l %%
Alkalinity 100 106 106 90.0-110
Sample Narrative:
LCS: Endpoint pH 4.5
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2358262
Wet Chemistry by Method 2320 B-2011 L1775210-03,15
Method Blank (MB)
(MB) R4116944-2 09/08/24 09:42
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Alkalinity U 8.45 20.0
Sample Narrative:
BLANK: Endpoint pH 4.5
L1775463-02 Original Sample (OS) • Duplicate (DUP)
(OS) L1775463-02 09/08/24 09:54 • (DUP) R4116944-3 09/08/24 09:58
Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD
Limits
Analyte mg/l mg/l %%
Alkalinity 197 196 1 0.308 20
Sample Narrative:
OS: Endpoint pH 4.5 Headspace
DUP: Endpoint pH 4.5
L1775463-12 Original Sample (OS) • Duplicate (DUP)
(OS) L1775463-12 09/08/24 11:55 • (DUP) R4116944-4 09/08/24 12:00
Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD
Limits
Analyte mg/l mg/l %%
Alkalinity 172 176 1 2.11 20
Sample Narrative:
OS: Endpoint pH 4.5 Headspace
DUP: Endpoint pH 4.5
Laboratory Control Sample (LCS)
(LCS) R4116944-1 09/08/24 09:35
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte mg/l mg/l %%
Alkalinity 100 101 101 90.0-110
Sample Narrative:
LCS: Endpoint pH 4.5
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2358072
Wet Chemistry by Method 300.0 L1775210-01,02,03,04,05,06,07,08,09,10,11,12,13,15
Method Blank (MB)
(MB) R4120186-1 09/08/24 18:13
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Sulfate U 0.637 5.00
L1775210-01 Original Sample (OS) • Duplicate (DUP)
(OS) L1775210-01 09/08/24 18:40 • (DUP) R4120186-3 09/08/24 18:53
Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD
Limits
Analyte mg/l mg/l %%
Sulfate 91.5 92.1 1 0.655 15
L1775210-02 Original Sample (OS) • Duplicate (DUP)
(OS) L1775210-02 09/08/24 19:34 • (DUP) R4120186-6 09/08/24 19:47
Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD
Limits
Analyte mg/l mg/l %%
Sulfate 78.4 78.0 1 0.487 15
Laboratory Control Sample (LCS)
(LCS) R4120186-2 09/08/24 18:26
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte mg/l mg/l %%
Sulfate 40.0 38.2 95.4 90.0-110
L1775210-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD)
(OS) L1775210-01 09/08/24 18:40 • (MS) R4120186-4 09/08/24 19:07 • (MSD) R4120186-5 09/08/24 19:20
Spike Amount Original Result MS Result MSD Result MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits
Analyte mg/l mg/l mg/l mg/l %%%%%
Sulfate 40.0 91.5 115 115 59.3 59.7 1 90.0-110 J6 J6 0.124 15
L1775210-02 Original Sample (OS) • Matrix Spike (MS)
(OS) L1775210-02 09/08/24 19:34 • (MS) R4120186-7 09/08/24 20:01
Spike Amount Original Result MS Result MS Rec.Dilution Rec. Limits MS Qualifier
Analyte mg/l mg/l mg/l %%
Sulfate 40.0 78.4 102 59.5 1 90.0-110 J6
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2359893
Volatile Organic Compounds (GC) by Method 8015D/GRO L1775210-01,02,03,04,05,06,07,08
Method Blank (MB)
(MB) R4118349-2 09/10/24 16:53
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
TPH (GC/FID) Low Fraction 0.0641 J 0.0314 0.100
(S)
a,a,a-Trifluorotoluene(FID)95.3 78.0-120
Laboratory Control Sample (LCS)
(LCS) R4118349-1 09/10/24 16:05
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte mg/l mg/l %%
TPH (GC/FID) Low Fraction 5.00 5.64 113 72.0-127
(S)
a,a,a-Trifluorotoluene(FID) 98.4 78.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2360275
Volatile Organic Compounds (GC) by Method 8015D/GRO L1775210-09,10,11,12,13,15
Method Blank (MB)
(MB) R4120022-2 09/11/24 10:38
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
TPH (GC/FID) Low Fraction 0.0884 J 0.0314 0.100
(S)
a,a,a-Trifluorotoluene(FID)95.1 78.0-120
Laboratory Control Sample (LCS)
(LCS) R4120022-1 09/11/24 09:50
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte mg/l mg/l %%
TPH (GC/FID) Low Fraction 5.00 5.72 114 72.0-127
(S)
a,a,a-Trifluorotoluene(FID) 98.8 78.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2359427
Volatile Organic Compounds (GC/MS) by Method 8260D L1775210-01,02,03,04,05,06
Method Blank (MB)
(MB) R4118980-2 09/10/24 10:17
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Benzene U 0.0000941 0.00100
Toluene U 0.000278 0.00100
Ethylbenzene U 0.000137 0.00100
Total Xylenes U 0.000174 0.00300
Methyl tert-butyl ether U 0.000101 0.00100
Naphthalene U 0.00100 0.00500
(S) Toluene-d8 87.5 80.0-120
(S) 4-Bromofluorobenzene 102 77.0-126
(S) 1,2-Dichloroethane-d4 89.3 70.0-130
Laboratory Control Sample (LCS)
(LCS) R4118980-1 09/10/24 09:40
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte mg/l mg/l %%
Benzene 0.00500 0.00560 112 70.0-123
Toluene 0.00500 0.00445 89.0 79.0-120
Ethylbenzene 0.00500 0.00407 81.4 79.0-123
Total Xylenes 0.0150 0.0130 86.7 79.0-123
Methyl tert-butyl ether 0.00500 0.00587 117 68.0-125
Naphthalene 0.00500 0.00328 65.6 54.0-135 J
(S) Toluene-d8 87.3 80.0-120
(S) 4-Bromofluorobenzene 106 77.0-126
(S) 1,2-Dichloroethane-d4 94.1 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2359482
Volatile Organic Compounds (GC/MS) by Method 8260D L1775210-07,08,09
Method Blank (MB)
(MB) R4118580-3 09/10/24 11:47
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Benzene U 0.0000941 0.00100
Toluene U 0.000278 0.00100
Ethylbenzene U 0.000137 0.00100
Total Xylenes U 0.000174 0.00300
Methyl tert-butyl ether U 0.000101 0.00100
Naphthalene U 0.00100 0.00500
(S) Toluene-d8 91.6 80.0-120
(S) 4-Bromofluorobenzene 98.0 77.0-126
(S) 1,2-Dichloroethane-d4 92.1 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4118580-1 09/10/24 10:50 • (LCSD) R4118580-2 09/10/24 11:09
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte mg/l mg/l mg/l %%%%%
Benzene 0.00500 0.00604 0.00566 121 113 70.0-123 6.50 20
Toluene 0.00500 0.00543 0.00523 109 105 79.0-120 3.75 20
Ethylbenzene 0.00500 0.00497 0.00473 99.4 94.6 79.0-123 4.95 20
Total Xylenes 0.0150 0.0153 0.0139 102 92.7 79.0-123 9.59 20
Methyl tert-butyl ether 0.00500 0.00542 0.00456 108 91.2 68.0-125 17.2 20
Naphthalene 0.00500 0.00459 0.00416 91.8 83.2 54.0-135 J J 9.83 20
(S) Toluene-d8 91.1 91.4 80.0-120
(S) 4-Bromofluorobenzene 96.8 95.3 77.0-126
(S) 1,2-Dichloroethane-d4 95.1 93.9 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2360363
Volatile Organic Compounds (GC/MS) by Method 8260D L1775210-10,11,12,13
Method Blank (MB)
(MB) R4119100-2 09/11/24 10:19
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Benzene U 0.0000941 0.00100
Toluene U 0.000278 0.00100
Ethylbenzene U 0.000137 0.00100
Total Xylenes U 0.000174 0.00300
Methyl tert-butyl ether U 0.000101 0.00100
Naphthalene U 0.00100 0.00500
(S) Toluene-d8 95.4 80.0-120
(S) 4-Bromofluorobenzene 101 77.0-126
(S) 1,2-Dichloroethane-d4 98.1 70.0-130
Laboratory Control Sample (LCS)
(LCS) R4119100-1 09/11/24 09:40
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte mg/l mg/l %%
Benzene 0.00500 0.00549 110 70.0-123
Toluene 0.00500 0.00552 110 79.0-120
Ethylbenzene 0.00500 0.00493 98.6 79.0-123
Total Xylenes 0.0150 0.0149 99.3 79.0-123
Methyl tert-butyl ether 0.00500 0.00457 91.4 68.0-125
Naphthalene 0.00500 0.00430 86.0 54.0-135 J
(S) Toluene-d8 93.8 80.0-120
(S) 4-Bromofluorobenzene 100 77.0-126
(S) 1,2-Dichloroethane-d4 98.7 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2360735
Volatile Organic Compounds (GC/MS) by Method 8260D L1775210-08,09
Method Blank (MB)
(MB) R4118987-2 09/11/24 22:11
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Benzene U 0.0000941 0.00100
(S) Toluene-d8 110 80.0-120
(S) 4-Bromofluorobenzene 103 77.0-126
(S) 1,2-Dichloroethane-d4 106 70.0-130
Laboratory Control Sample (LCS)
(LCS) R4118987-1 09/11/24 21:08
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte mg/l mg/l %%
Benzene 0.00500 0.00529 106 70.0-123
(S) Toluene-d8 103 80.0-120
(S) 4-Bromofluorobenzene 98.1 77.0-126
(S) 1,2-Dichloroethane-d4 110 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2362424
Volatile Organic Compounds (GC/MS) by Method 8260D L1775210-14,15
Method Blank (MB)
(MB) R4119972-4 09/13/24 21:37
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Benzene U 0.0000941 0.00100
Toluene U 0.000278 0.00100
Ethylbenzene U 0.000137 0.00100
Total Xylenes U 0.000174 0.00300
Methyl tert-butyl ether U 0.000101 0.00100
Naphthalene U 0.00100 0.00500
(S) Toluene-d8 108 80.0-120
(S) 4-Bromofluorobenzene 104 77.0-126
(S) 1,2-Dichloroethane-d4 110 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4119972-1 09/13/24 19:51 • (LCSD) R4119972-2 09/13/24 20:12
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte mg/l mg/l mg/l %%%%%
Benzene 0.00500 0.00479 0.00491 95.8 98.2 70.0-123 2.47 20
Toluene 0.00500 0.00518 0.00522 104 104 79.0-120 0.769 20
Ethylbenzene 0.00500 0.00500 0.00510 100 102 79.0-123 1.98 20
Total Xylenes 0.0150 0.0147 0.0149 98.0 99.3 79.0-123 1.35 20
Methyl tert-butyl ether 0.00500 0.00475 0.00478 95.0 95.6 68.0-125 0.630 20
Naphthalene 0.00500 0.00424 0.00408 84.8 81.6 54.0-135 J J 3.85 20
(S) Toluene-d8 108 109 80.0-120
(S) 4-Bromofluorobenzene 105 106 77.0-126
(S) 1,2-Dichloroethane-d4 111 109 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2361730
Semi-Volatile Organic Compounds (GC) by Method 8015D L1775210-01,02,03,04,05,06,07,08,09,10,11,12,13,15
Method Blank (MB)
(MB) R4121051-1 09/17/24 17:31
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
TPH (GC/FID) High Fraction U 0.0247 0.100
(S) o-Terphenyl 89.5 52.0-156
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4121051-2 09/17/24 17:51 • (LCSD) R4121051-3 09/17/24 18:12
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte mg/l mg/l mg/l %%%%%
TPH (GC/FID) High Fraction 1.50 1.46 1.53 97.3 102 50.0-150 4.68 20
(S) o-Terphenyl 89.5 86.0 52.0-156
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2361732
Semi-Volatile Organic Compounds (GC) by Method 8015D L1775210-01,02,03,04,05,06,07,08,09,10,11,12,13,15
Method Blank (MB)
(MB) R4121052-1 09/17/24 18:32
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
DRO w/ SGT 0.0670 J 0.0247 0.100
(S) o-Terphenyl 78.0 52.0-156
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4121052-2 09/17/24 18:52 • (LCSD) R4121052-3 09/17/24 19:12
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte mg/l mg/l mg/l %%%%%
DRO w/ SGT 1.50 1.38 1.28 92.0 85.3 50.0-150 7.52 20
(S) o-Terphenyl 81.0 65.5 52.0-156
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report
The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not
intended as a comprehensive explanation, and if you have additional questions please contact your project representative.
Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name,
Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and
Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.
Abbreviations and Definitions
MDL Method Detection Limit.
RDL Reported Detection Limit.
Rec.Recovery.
RPD Relative Percent Difference.
SDG Sample Delivery Group.
(S)
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and
Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be
detected in all environmental media.
U Not detected at the Reporting Limit (or MDL where applicable).
Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes
reported.
Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the
standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the
laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the
result reported has already been corrected for this factor.
Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal
for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or
duplicated within these ranges.
Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control
sample. The Original Sample may not be included within the reported SDG.
Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result
reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and
potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.
Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was
no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL”
(Below Detectable Levels). The information in the results column should always be accompanied by either an MDL
(Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect
or report for this analyte.
Uncertainty
(Radiochemistry)Confidence level of 2 sigma.
Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol
observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will
be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.
Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or
analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not
being performed on your samples typically, but on laboratory generated material.
Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and
date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This
chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the
samples from the time of collection until delivery to the laboratory for analysis.
Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided
by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for
each sample will provide the name and method number for the analysis reported.
Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and
times of preparation and/or analysis.
Qualifier Description
B The same analyte is found in the associated blank.
C3 The reported concentration is an estimate. The continuing calibration standard associated with this data responded low.
Method sensitivity check is acceptable.
J The identification of the analyte is acceptable; the reported value is an estimate.
J6 The sample matrix interfered with the ability to make any accurate determination; spike value is low.
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122
Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN000032021-1
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹DW21704
Georgia NELAP North Carolina ³41
Georgia ¹923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶KY90010 South Carolina 84004002
Kentucky ²16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003
ACCREDITATIONS & LOCATIONS

¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable
* Not all certifications held by the laboratory are applicable to the results reported in the attached report.
* Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical.
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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ATTACHMENT C

Additional Sampling Requirement Directive dated April 14, 2023
Facility ID# 1200035
Page 3
Analytical Methods for Environmental Sampling at
Petroleum Storage Tank Sites in Utah
(September 2022)
Substance or
Product Type
Contaminant Compounds to be Analyzed for Each
Substance or Product Type
ANALYTICAL METHODS1
Soil, Groundwater
or Surface Water
Gasoline
Total Petroleum Hydrocarbons (purgeable TPH as gasoline
range organics C6 - C10)
EPA 8015 or EPA 8260
Benzene, Toluene, Ethyl benzene, Xylenes, Naphthalene,
(BTEXN) and MTBE
EPA 8021 or EPA 8260
Diesel
Total Petroleum Hydrocarbons (extractable TPH as diesel
range organics C10 – C28)
EPA 8015
Benzene, Toluene, Ethyl benzene, Xylenes, and Naphthalene
(BTEXN)
EPA 8021 or EPA 8260
Used Oil
Oil and Grease (O&G) or
Total Recoverable Petroleum Hydrocarbons (TRPH)
EPA 1664 or
EPA 1664 (SGT*)
Benzene, Toluene, Ethyl benzene, Xylenes, Naphthalene
(BTEXN) & MTBE; and Halogenated Volatile Organic
Compounds (VOX)
EPA 8021 or EPA 8260
New Oil Oil and Grease (O&G) or
Total Recoverable Petroleum Hydrocarbons (TRPH)
EPA 1664 or
EPA 1664 (SGT*)
Other Type of analyses will be based upon the substance or product
stored, and as approved by the DERR Division Director
Method will be based upon the
substance or product type
Unknown
Total Petroleum Hydrocarbons (purgeable TPH as gasoline
range organics C6 - C10)
EPA 8015 or EPA 8260
Total Petroleum Hydrocarbons (extractable TPH as diesel
range organics C10 – C28)
EPA 8015
Oil and Grease (O&G) or
Total Recoverable Petroleum Hydrocarbons (TRPH)
EPA 1664 or
EPA 1664 (SGT*)
Benzene, Toluene, Ethyl benzene, Xylenes, and Naphthalene
(BTEXN) and MTBE; and Halogenated Volatile Organic
Compounds (VOX)
EPA 8021 or EPA 8260
1 The following modifications to these certified methods are considered acceptable by the DERR Division Director:
•Dual column confirmation may not be required for TPH and BTEXN/MTBE analysis.
•A micro-extraction or scale-down technique may be used for aqueous samples, but only for the
determination of extractable TPH as diesel range organics (C10 – C28).
•Hexane may be used as an extraction solvent.
•*Silica Gel Treatment (SGT) may be used in the determination of Total Recoverable Petroleum Hydrocarbons.
NOTE: The sample preparation method and any modification(s) to a certified method must be reported by the laboratory.