DERR-2025-000672

SEMI-ANNUAL GROUNDWATER MONITORING REPORT
NOVEMBER 2024 EVENT
Pilot Travel Center #294
1670 W 12th Street
Ogden (Marriott-Slaterville), Weber County, Utah
UDEQ-DERR Facility ID #1200515, LUST Release ID: MZR
Prepared for:
Utah Department of Environmental Quality
Division of Environmental Response and Remediation
195 North 1950 West
P.O. Box 144840
Salt Lake City, Utah 84114-4840
Prepared by:
Broadbent & Associates, Inc.
186 E. Main St, Suite #99
Sandy, Utah 84070
[phone]
January 21, 2025
Project No. 19-14-107

SEMI-ANNUAL GROUNDWATER MONITORING REPORT
NOVEMBER 2024 EVENT
PILOT TRAVEL CENTER #294
OGDEN (MARRIOTT-SLATERVILLE), WEBER COUNTY, UTAH

Broadbent & Associates, Inc. (Broadbent) is pleased to present this Semi-Annual Groundwater Monitoring Report,
November 2024 Event on behalf of Pilot Travel Centers LLC (Pilot) associated with Pilot Travel Center #294 (Site)
located in Ogden (Marriott-Slaterville), Utah. Figure 1 depicts the general location of the Site. Figure 2 depicts the
general area of investigation associated with the Site. Groundwater monitoring and sampling was performed to
assist with evaluation of Site conditions associated with a release of fuel from the underground storage tank (UST)
system. Fuel was released due to a rupture in the flex line of the STP sump for UST #5 (the southern-most 20,000-
gallon capacity diesel UST, located in the center of the UST basin). Details of work performed, discussion of results,
and recommendations are provided below. Field work and sampling activities were performed by Sarah Hamilton
(GS #1869).

Facility Name / Address: Pilot Travel Center #294, 1670 W 12th Street, Ogden (Marriott-
Slaterville), Weber County, Utah
Pilot Project Manager / Title: Mr. Joey Cupp – Sr. Director, Environmental, [phone]
Broadbent Contact: Mr. Aric Morton, [phone]
Broadbent Project No.: 19-14-107
Primary Regulatory Agency / ID No.: Utah Department of Environmental Quality (UDEQ)
DERR Facility ID #1200515, LUST Release ID: MZR
Current phase of project: Monitoring and evaluation of Site conditions
List of Acronyms / Abbreviations: See end of report text for list of acronyms/abbreviations used in
report.

WORK PERFORMED THIS PERIOD (July-December 2024):
1. Conducted groundwater monitoring and sampling on November 14, 2024.

WORK SCHEDULED FOR NEXT PERIOD (January-June 2025):
1. Prepare and submit the Semi-Annual Groundwater Monitoring Report, November 2024 Event (herein).
2. Conduct semi-annual groundwater monitoring and sampling event in June 2025.

SEMI-ANNUAL MONITORING PLAN SUMMARY:
Groundwater level gauging: MW-2 through MW-9, MW-13 &
MW-14;
(semi-annual)
MW-10 and MW-12 (biennial)
Groundwater sample collection: MW-2 through MW-9, MW-13 &
MW-14
(semi-annual)
MW-10 and MW-12 (biennial)

Broadbent & Associates, Inc. Semi-Annual Groundwater Monitoring Report
Salt Lake City, Utah Pilot Travel Center #294/Ogden (Marriott-Slaterville), Utah
January 21, 2025
Page 2

SEMI-ANNUAL RESULTS SUMMARY:

ACTIVITIES CONDUCTED & RESULTS:

Semi-annual groundwater monitoring and sampling activities were conducted on November 14, 2024 by Sarah
Hamilton, certified sampler GS-1869. Wells MW-1 through MW-8, MW-11, MW-12, and MW-14 were monitored
for depth to water and depth to LNAPL, if present. No LNAPL was observed during this sampling. The monitoring
schedule for gauging and sampling is summarized in Table 1. Wells MW-9 and MW-13 were not located. Well MW-
1 was used as a substitute for MW-9 as it was the closest monitoring well. The well cap for MW-10 could not be
removed and no gauging occurred. MW-11 (no longer apart of sampling plan) and MW-12 (only to be sampled
biennial) were inadvertently gauged. No other irregularities were reported during gauging. Measured depths to
groundwater ranged from 5.55 feet in well MW-5 to 7.90 feet in well MW-1. Water level elevations yielded a
horizontal groundwater gradient with a general direction to the north-northwest at an approximate magnitude of
0.001 feet/foot. Groundwater elevations decreased approximately 2.11 feet across the Site since the previous
monitoring event. Broadbent’s groundwater monitoring and sampling field procedures are provided in Appendix
A. Groundwater monitoring field data sheets are provided in Appendix B. Current and historical measured depths
to groundwater and respective groundwater elevations are summarized in Table 2. Figure 1 depicts the general
location of the Site. Figure 2 depicts the general area of investigation associated with the Site. A groundwater
potentiometric surface map is attached as Figure 3.

Groundwater samples were collected from Wells MW-1 through MW-8, MW-11, MW-12, and MW-14 were
sampled. The monitoring schedule for gauging and sampling is summarized in Table 1. Wells MW-9 and MW-13
were not located. Well MW-1 was used as a substitute for MW-9 as it was the closest monitoring well. The well
cap for MW-10 could not be removed and no sampling occurred. MW-11 (no longer apart of sampling plan) and
MW-12 (only to be sampled biennial) were inadvertently sampled. No other irregularities were reported during
purging or sampling. Samples were submitted on ice, under chain-of-custody protocol, to Pace Analytical for
analysis of total petroleum hydrocarbons (TPH) diesel range organics (DRO) with silica gel treatment by EPA
Method 3511/8015. The laboratory extracted and analyzed the samples within the recommended hold times. A
groundwater analytical map is attached as Figure 4. Laboratory analytical results are summarized in Table 1. The
laboratory report and chain-of-custody documentation are attached as Appendix C.

Analytical results yield the following notable observations:

• TPH-DRO was detected in six (6) of the 11 collected groundwater samples at concentrations ranging from
112 µg/L (MW-5) to 3,660 µg/L (MW-3).
LNAPL
LNAPL observed this quarter: No (yes/no)
LNAPL recovered this quarter: 0.0 (gal)
Cumulative LNAPL recovered: 0.0 (gal)

Groundwater Elevation and Gradient:
Depth to groundwater: 5.55 (MW-5) to 7.90 (MW-1) (ft below TOC)
Gradient direction: North-Northwest (compass direction)
Gradient magnitude: 0.001 (ft/ft)
Average change in elevation: -2.11 (ft since last measurement)

Laboratory Analytical Data
Summary:
TPH-DRO was detected in six (6) of 11 groundwater monitoring wells
sampled during the November 2024 event. MW-3 (3,660 µg/L) and
MW-6 (1,220 µg/L) concentrations were detected above UDEQ Initial
Screening Levels (ISLs) of 1,000 µg/L.
Broadbent & Associates, Inc. Semi-Annual Groundwater Monitoring Report
Salt Lake City, Utah Pilot Travel Center #294/Ogden (Marriott-Slaterville), Utah
January 21, 2025
Page 3

• Samples from MW-3 (3,660 µg/L) and MW-6 (1,220 µg/L) exhibited residual TPH-DRO concentrations
exceeding the UDEQ ISL of 1,000 µg/L during this sampling event.

DISCUSSION:

The Semi-Annual 2024 groundwater monitoring event was conducted on November 14, 2024. Site associated
groundwater monitoring wells were sampled in accordance with the Corrective Action Plan Amendment Approval
dated February 4, 2020. Depth to water gauging in Site wells resulted in a general groundwater gradient direction
to the north-northwest at an average magnitude of 0.001 ft/ft. LNAPL was not observed during this monitoring
event.

Residual concentrations have fluctuated since the previous monitoring event, including decreases from 1,260 µg/L
to 602 µg/L in MW-8 and from 1,640 µg/L to 1,220 µg/L in MW-6, as well as an increase from 2,950 µg/L to 3,660
µg/L in MW-3. Graphs 1 through 4 depict TPH-DRO concentrations versus time for select monitoring wells.

RECOMMENDATIONS:

Broadbent recommends continuing with the semi-annual groundwater monitoring and sampling schedule in
accordance with the Corrective Action Plan Amendment Approval letter dated February 4, 2020. Site monitor wells
MW-2 through MW-8 and MW-10 through MW-14 are scheduled to be sampled in June 2025 to assist with
continued evaluation of residual impacts associated with LUST Release ID: MZR. Monitoring wells MW-9 and MW-
13 will be sampled if they are located and access to MW-10 will be further evaluated.

LIMITATIONS:

The findings presented in this report are based upon observations of field personnel, points investigated, results
of laboratory tests performed by Pace Analytical in Mt. Juliet, Tennessee and our understanding of UDEQ
practices. Our services were performed in accordance with the generally accepted standard of practice at the time
this report was written. No other warranty expressed or implied was made. This report has been prepared for the
exclusive use of Pilot Travel Centers LLC. It is possible that variations in soil or groundwater conditions could exist
beyond points explored in this investigation. Also, changes in site conditions could occur in the future due to
variations in rainfall, temperature, regional water usage, or other factors.

REFERENCES:

Broadbent & Associates, Inc., 2024. Semi-Annual Groundwater Monitoring Report May 2024 Event, Flying J Travel
Center #294. June 20, 2024.

Utah Department of Environmental Quality, 2005. Initial Screening Levels. November 5.

Utah Department of Environmental Quality-Division of Environmental Response and Remediation, 2020.
Corrective Action Plan Amendment Approval letter. February 4.

Broadbent & Associates, Inc. Semi-Annual Groundwater Monitoring Report
Salt Lake City, Utah Pilot Travel Center #294/Ogden (Marriott-Slaterville), Utah
January 21, 2025
Page 4

ATTACHMENTS:

Figure 1 Site Location Map
Figure 2 Site Layout Map
Figure 3 Potentiometric Surface Map (11/14/24)
Figure 4 Groundwater Analytical Map (11/14/24)

Table 1 Groundwater Monitoring and Analytical Schedule
Table 2 Groundwater Monitoring and Analytical Results

Graphs 1-4 TPH-DRO Concentration and Depth to Water vs. Time for Selected Wells

Appendix A: Field Methods
Appendix B: Field Data Sheets
Appendix C: Laboratory Report and Chain of Custody Documentation

LIST OF COMMONLY USED ACCRONYMS/ABBREVIATIONS:

BTEX: benzene, toluene, ethylbenzene, total xylenes LNAPL: light non-aqueous phase liquid
DO: dissolved oxygen MTBE: methyl tertiary butyl ether
DRO: diesel range organics NO3: nitrate as nitrogen
Eh: oxidation reduction potential PAHs: polycyclic aromatic hydrocarbons
Fe2+: ferrous iron SO4: sulfate
ft/ft: feet per foot SVOCs: semi-volatile organic compounds
gal: gallons TOC: top of casing
TPH: total petroleum hydrocarbons g/L: micrograms per liter
UDEQ Utah Department of Environmental Quality ISLs Initial Screening Levels

Site Location Map
Pilot Travel Center #294
1670 West 12th Street
Ogden, Utah
Project No. 19-14-107
Figure
Prepared by: JEH Reviewed by: ACM Date: 2/16/21
1
0
SCALE: 1 inch = 3000 feet
3000 6000
LEGEND
Site Location
W 12th Street
Auto Fuel Islands
Di
e
s
e
l

F
u
e
l

I
s
l
a
n
d
s
S
1
7
0
0

W
Pilot Travel
Center
W 1200 S
MW-13
MW-7
MW-14
MW-10
MW-2
MW-8
MW-3
MW-4MW-6
MW-5
MW-12
MW-1
MW-9
MW-11
Site Layout Map
Pilot Travel Center #294
1670 West 12th Street
Ogden, Utah
Project No. 19-14-107
Figure
Prepared by: JEH Reviewed by: ACM Date: 2/16/21
2
0
SCALE: 1 inch = 70 feet
70 140
LEGEND
Property Boundary (approximate)
Monitoring Well LocationMW-2
W 12th Street
Auto Fuel Islands
Di
e
s
e
l

F
u
e
l

I
s
l
a
n
d
s
S
1
7
0
0

W
Pilot Travel
Center
W 1200 S
92.03
92.06
92.11
92.10
92.04
92.02
92.01
92.03
Not Measured
MW-13
MW-7
MW-14
MW-10
MW-2
MW-8
MW-3
MW-4MW-6
MW-5
MW-12
MW-1
MW-9
MW-11
92.10
92.14
92.11
Not Measured
Not Measured
Potentiometric Surface Map (11/14/24)
Pilot Travel Center #294
1670 West 12th Street
Ogden, Utah
Project No. 19-14-107
Figure
Prepared by: AGH Reviewed by: ACM Date: 12/18/24
3
0
SCALE: 1 inch = 70 feet
70 140
LEGEND
Property Boundary (approximate)
Monitoring Well Location and Groundwater Elevation (feet)MW-2
Groundwater Elevation Contour (0.02 feet)92.02
Groundwater Flow Direction (0.001 feet/foot)
*Monitoring well not utilized for potentiometric surface depiction
W 12th Street
Auto Fuel Islands
Di
e
s
e
l

F
u
e
l

I
s
l
a
n
d
s
S
1
7
0
0

W
Pilot Travel
Center
W 1200 S
TPH-DRO < 100
TPH-DRO = 602
TPH-DRO = 514
Not Sampled
Not Sampled
TPH-DRO = 1,220
TPH-DRO = 3,660
TPH-DRO = 112
TPH-DRO < 100
TPH-DRO < 100
MW-13
MW-7
MW-14
MW-10
MW-2
MW-8
MW-3
MW-4MW-6
MW-5
MW-12
MW-1
MW-9
MW-11
TPH-DRO = 149
TPH-DRO < 100
Not Sampled
TPH-DRO < 100
Not Sampled
Groundwater Analytical Map (11/14/24)
Pilot Travel Center #294
1670 West 12th Street
Ogden, Utah
Project No. 19-14-107
Figure
Prepared by: AGH Reviewed by: ACM Date: 12/18/24
4
0
SCALE: 1 inch = 70 feet
70 140
LEGEND
Property Boundary (approximate)
Monitoring Well LocationMW-2
TPH-DRO = 602 Total Petroleum Hydrocarbons
Diesel Range Organics (µg/L)
Key to Dissolved Groundwater Concentrations*
*Concentrations in BOLD exceed UDEQ ISL Regulatory Standards
Sample ID Q2 2024 Q4 2024 Q2 2025 Q4 2025 Q2 2026 Q4 2026 Q2 2027 Q4 2027
MW-2 x x x x x x x x
MW-3 x x x x x x x x
MW-4 x x x x x x x x
MW-5 x x x x x x x x
MW-6 x x x x x x x x
MW-7 x x x x x x x x
MW-8 x x x x x x x x
MW-9 x x x x x x x x
MW-10 x x x x
MW-12 x x x x
MW-13 x x x x x x x x
MW-14 x x x x x x x x
TABLE 1
Groundwater Monitoring and Analytical Schedule
Pilot Travel Center No. 294
1670 West 12th Street, Ogden (Marriott-Slaterville), Utah
Benzene Toluene Ethyl
Benzene
Total
Xylenes MTBE Naphth-
alene TPH-GRO TPH-DRO
5 1,000 700 10,000 200 700 1,000 1,000
300 3,000 4,000 10,000 200 700 10,000 10,000
03/20/13 6.17 93.83
06/12/13 4.59 95.41
08/07/13 5.05 94.95
11/13/13 6.63 93.37
02/17/14 6.54 93.46
04/29/14 6.43 93.57
08/28/14 4.75 95.25
11/20/14 6.59 93.41
02/25/15 7.32 92.68
05/14/15 <1.0 <1.0 <1.0 1.1J <1.0 0.51J 44.9J 7,720 5.42 94.58
12/08/15 <1.0 <1.0 <1.0 2.5 <1.0 2.8J <200 303 6.49 93.51
06/01/16 <1.0 <1.0 <1.0 3.7 <1.0 <4.0 <200 105,000 5.33 94.67
12/07/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 3,780 6.49 93.51
06/20/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 2,530 4.71 95.29
12/27/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <200 6.63 93.37
07/05/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 1,380 4.99 95.01
12/18/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 285 6.40 93.60
06/13/19 NM NM
12/16/20 NM NM
06/04/21 665 6.80 93.20
03/02/22 NM 7.89 92.11
06/27/23 730 6.55 93.45
12/05/23 608 7.34 92.66
05/28/24 857 5.73 94.27
11/14/24 149 7.90 92.10
03/20/13 0.29J 1.6J 0.60J 6.5 <2.0 <5.0 <200 187J 5.38 93.86
06/12/13 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 <190 3.82 95.42
08/07/13 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 <190 4.28 94.96
11/13/13 2.6 <2.0 0.49J <3.0 <2.0 <5.0 <200 <190 5.85 93.39
02/17/14 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 <190 5.75 93.49
04/30/14 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 1,040 5.65 93.59
08/28/14 <1.0 <1.0 <1.0 <2.0 <1.0 <2.0 <200 <190 3.96 95.28
11/20/14 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 5.82 93.42
02/25/15 3.4 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 6.53 92.71
05/14/15b NA NA NA NA NA NA NA NA 4.65 94.59
06/10/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 4.23 95.01
12/08/15 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <190 5.72 93.52
06/02/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <200 4.56 94.68
12/06/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <190 5.70 93.54
06/19/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <200 3.33 95.91
12/27/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <190 5.84 93.40
07/05/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <200 4.22 95.02
12/19/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <200 5.62 93.62
06/13/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <500 <100 3.80 95.44
12/11/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 413 JB <100 4.89 94.35
12/16/20 123 6.99 92.25
06/04/21 110 6.02 93.22
03/02/22 172 7.11 92.13
05/12/22 161 6.00 93.24
11/29/22 121 7.21 92.03
06/27/23 <100 5.76 93.48
12/05/23 <100 6.55 92.69
05/28/24 100 4.97 94.27
11/14/24 <100 7.10 92.14
LNAPL = 0.10 ft, not sampled
LNAPL = 0.06 ft, not sampled
MW-2
LNAPL = 0.07 ft, not sampled
LNAPL = 0.06 ft, not sampled
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
TABLE 2
Groundwater Monitoring and Analytical Results
Pilot Travel Center No. 294
1670 West 12th Street, Ogden (Marriott-Slaterville), Utah
LNAPL = 0.07 ft, not sampled
Relative
Groundwater
Elevation
(feet)
Depth to
Groundwater
(feet btoc)a
LNAPL = 0.09 ft, not sampled
LNAPL = 0.16 ft, not sampled
LNAPL = 0.02 ft, not sampled
LNAPL = 0.03 ft, not sampled
No longer sampled or gauged as per CAP
No longer sampled or gauged as per CAP
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Well No.Date
UDEQ ISL
RBCA Tier 1 SL
MW-1
Concentrations (µg/L)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Broadbent 294 Analytical Tables 2024 SH Page 1 of 8
Benzene Toluene Ethyl
Benzene
Total
Xylenes MTBE Naphth-
alene TPH-GRO TPH-DRO
5 1,000 700 10,000 200 700 1,000 1,000
300 3,000 4,000 10,000 200 700 10,000 10,000
TABLE 2
Groundwater Monitoring and Analytical Results
Pilot Travel Center No. 294
1670 West 12th Street, Ogden (Marriott-Slaterville), Utah
Relative
Groundwater
Elevation
(feet)
Depth to
Groundwater
(feet btoc)a
LNAPL = 0.16 ft, not sampled
Well No.Date
UDEQ ISL
RBCA Tier 1 SL
MW-1
Concentrations (µg/L)
03/20/13 5.06 93.84
06/12/13 3.55 95.35
08/07/13 3.97 94.93
11/13/13 5.52 93.38
02/17/14 5.46 93.44
04/30/14 2.0 <2.0 6.9 50.6 <2.0 3.5J 268 420 5.35 93.55
08/28/14 3.65 95.25
11/20/14 0.28J <1.0 1.3 11.5 <1.0 <5.0 51.4 189J 5.51 93.39
02/25/15 <1.0 <1.0 <1.0 7.1 <1.0 <5.0 44.7J 192 6.21 92.69
05/14/15 4.34 94.56
12/08/15 5.43 93.47
06/02/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 827 4.25 94.65
12/06/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 550 5.40 93.50
06/19/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <200 3.62 95.28
12/27/17 5.53 93.37
07/05/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 615 3.91 94.99
12/19/18 1.3 <1.0 <1.0 <1.0 <1.0 <4.0 <200 591 5.30 93.60
06/13/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <500 295 3.45 95.45
12/11/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 432 JB 1,600 4.59 94.31
12/16/20 6.81 92.09
06/04/21 3,990 5.71 93.19
03/02/22 6.85 92.05
05/12/22 1,330 5.71 93.19
11/29/22 2,270 6.79 92.11
06/27/23 403 5.45 93.45
12/05/23 3,490 6.26 92.64
05/28/24 2,950 4.64 94.26
11/14/24 3,660 6.80 92.10
03/20/13 196 800 151 1,330 <2.0 38.5 8,740 59,900 4.18 93.84
06/12/13 22.1 2.0 42.1 342 <2.0 6.3 1,190 2,090 2.70 95.32
08/07/13 3.17 94.85
11/13/13 4.69 93.33
02/17/14 2.9 <2.0 2.5 54.5 <2.0 6.8 368 602 4.56 93.46
04/30/14 13.1 <2.0 9.3 193 <2.0 11.7 1,110 1,180 4.47 93.55
08/28/14 31.6 <1.0 40.2 125 <1.0 7.4 592 1,340 2.85 95.17
11/20/14 5.9 <1.0 1.6 1.1J <1.0 1.1J 151 1,100 4.63 93.39
02/25/15 1.4 <1.0 <1.0 <2.0 <1.0 1.5J 135 791 5.33 92.69
05/14/15b NA NA NA NA NA NA NA NA 3.44 94.58
06/10/15 26.1 <1.0 5.6 0.70J <1.0 2.8J 365 1,330 3.20 94.82
12/08/15 0.80J <1.0 <1.0 <1.0 <1.0 <4.0 <200 1,020 4.54 93.48
06/01/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 2,630 3.42 94.60
12/07/16 0.63J <1.0 <1.0 <1.0 <1.0 <4.0 <200 1,190 4.52 93.50
06/20/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 770 2.83 95.19
12/28/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 852 4.64 93.38
07/05/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 1,540 3.08 94.94
12/18/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 998 4.40 93.62
06/13/19 <1.0 <1.0 <1.0 3.54 <1.0 <5.0 <500 1,110 2.60 95.42
12/11/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 440 JB 1,460 3.72 94.30
12/16/20 711 5.78 92.24
06/04/21 377 4.89 93.13
03/02/22 1,310 5.95 92.07
05/12/22 355 4.89 93.13
11/29/22 753 5.94 92.08
06/27/23 459 4.65 93.37
12/05/23 203 5.40 92.62
05/28/24 607 3.81 94.21
11/14/24 514 5.98 92.04(no longer analyzed as per DERR)
MW-3
MW-4
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
LNAPL = 0.06 ft, not sampled
LNAPL = 0.47 ft, not sampled
LNAPL = 0.08 ft, not sampled
LNAPL = 0.35 ft, not sampled
LNAPL = 0.17 ft, not sampled
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
LNAPL = 0.08 ft, not sampled
LNAPL = 0.24 ft, not sampled
LNAPL = 0.2 ft, not sampled
(no longer analyzed as per DERR)
LNAPL = 0.03 ft, not sampled
LNAPL = 0.15 ft, not sampled
LNAPL = 0.19 ft, not sampled
(no longer analyzed as per DERR)
LNAPL = 0.06 ft, not sampled
(no longer analyzed as per DERR)
LNAPL = 0.02 ft, not sampled
(no longer analyzed as per DERR)
1.0
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Broadbent 294 Analytical Tables 2024 SH Page 2 of 8
Benzene Toluene Ethyl
Benzene
Total
Xylenes MTBE Naphth-
alene TPH-GRO TPH-DRO
5 1,000 700 10,000 200 700 1,000 1,000
300 3,000 4,000 10,000 200 700 10,000 10,000
TABLE 2
Groundwater Monitoring and Analytical Results
Pilot Travel Center No. 294
1670 West 12th Street, Ogden (Marriott-Slaterville), Utah
Relative
Groundwater
Elevation
(feet)
Depth to
Groundwater
(feet btoc)a
LNAPL = 0.16 ft, not sampled
Well No.Date
UDEQ ISL
RBCA Tier 1 SL
MW-1
Concentrations (µg/L)
06/11/13 7.2 <2.0 9.4 29.9 <2.0 3.1J <200 1,880 2.41 95.15
08/07/13 8.6 <2.0 1.5J 304 <2.0 11.4 1,780 1,170 2.77 94.79
11/13/13 1.1 <2.0 <2.0 <3.0 <2.0 3.2J <200 243 4.25 93.31
02/17/14 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 510 4.13 93.43
04/30/14 0.39J <2.0 <2.0 <3.0 <2.0 3.2J <200 468 4.05 93.51
08/28/14 0.26J <1.0 <1.0 <2.0 <1.0 <2.0 <200 543 2.49 95.07
11/20/14 <1.0 <1.0 <1.0 <2.0 <1.0 0.63J 31.7J 851 4.21 93.35
02/25/15 <1.0 0.36J <1.0 <2.0 <1.0 <5.0 91.4 395 4.90 92.66
05/14/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 425 2.98 94.58
12/08/15 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 913 4.12 93.44
06/02/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 2,000 3.00 94.56
12/07/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 910 4.09 93.47
06/19/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 712 2.50 95.06
12/28/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 1,430 4.19 93.37
07/05/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 267 2.64 94.92
12/18/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 2,610 3.93 93.63
06/13/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <500 679 2.22 95.34
12/11/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 419 JB 1,710 3.35 94.21
12/16/20 229 5.39 92.17
06/04/21 333 4.52 93.04
03/02/22 906 5.57 91.99
05/12/22 522 4.48 93.08
11/29/22 <100 5.58 91.98
06/27/23 498 4.32 93.24
12/05/23 <100 5.05 92.51
05/28/24 270 3.71 93.85
11/14/24 112 5.55 92.01
06/12/13 22.6 84.4 28.1 265 <2.0 7.6 1,310 2,750 2.75 95.26
08/07/13 28.0 5.7 63.9 504 <2.0 11.3 2,910 5,060 3.17 94.84
11/13/13 7.2 <2.0 15.5 289 <2.0 9.9 1,070 2,260 4.67 93.34
02/17/14 6.5 <2.0 14.8 94.9 <2.0 5.2 596 2,100 4.55 93.46
04/30/14 5.4 <2.0 13.4 47.6 <2.0 5.9 398 1,450 4.45 93.56
08/28/14 2.86 95.15
11/20/14 0.54J <1.0 0.80J 2.9 <1.0 0.99J 130 3,290 4.63 93.38
02/25/15 0.20J <1.0 <1.0 1.1J <1.0 0.66J 151 1,790 5.34 92.67
05/14/15b NA NA NA NA NA NA NA NA 3.46 94.55
06/10/15 0.42J <1.0 0.26J <2.0 <1.0 1.1J 109 1,950 3.10 94.91
12/08/15 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 196 4.55 93.46
06/01/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 25,700 3.46 94.55
12/07/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 3,240 4.51 93.50
06/19/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 3,010 2.84 95.17
12/27/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 3,550 4.62 93.39
07/05/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 2,500 3.09 94.92
12/18/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 2,510 2.22 95.79
06/13/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <500 5,290 2.65 95.36
12/11/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 435 JB 6,050 3.72 94.29
12/16/20 1,610 5.77 92.24
06/04/21 2,860 4.85 93.16
03/02/22 47,100 4.51 93.50
05/12/22 1,400 4.88 93.13
11/29/22 358 5.90 92.11
06/27/23 568 4.69 93.32
12/05/23 820 5.43 92.58
05/28/24 1,640 4.01 94.00
11/14/24 1,220 5.99 92.02(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
MW-6
LNAPL = 0.01 ft, not sampled
(no longer analyzed as per DERR)
MW-5
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Broadbent 294 Analytical Tables 2024 SH Page 3 of 8
Benzene Toluene Ethyl
Benzene
Total
Xylenes MTBE Naphth-
alene TPH-GRO TPH-DRO
5 1,000 700 10,000 200 700 1,000 1,000
300 3,000 4,000 10,000 200 700 10,000 10,000
TABLE 2
Groundwater Monitoring and Analytical Results
Pilot Travel Center No. 294
1670 West 12th Street, Ogden (Marriott-Slaterville), Utah
Relative
Groundwater
Elevation
(feet)
Depth to
Groundwater
(feet btoc)a
LNAPL = 0.16 ft, not sampled
Well No.Date
UDEQ ISL
RBCA Tier 1 SL
MW-1
Concentrations (µg/L)
06/11/13 4.1 <2.0 4.5 4.7 <2.0 <5.0 <200 419 2.85 95.20
08/07/13 <1.0 <2.0 3.4 <3.0 <2.0 <5.0 <200 309 3.27 94.78
11/13/13 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 <190 4.72 93.33
02/17/14 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 <190 4.63 93.42
04/30/14 <1.0 <2.0 <2.0 <3.0 <2.0 2.2J <200 <190 4.54 93.51
08/28/14 <1.0 <1.0 <1.0 <2.0 <1.0 <2.0 <200 239 3.01 95.04
11/20/14 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 228 4.71 93.34
02/25/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 5.40 92.65
05/14/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 3.57 94.48
12/08/15 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 2,520 4.61 93.44
06/02/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 854 3.03 95.02
12/06/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 368 4.60 93.45
06/19/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 411 2.99 95.06
12/28/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 277 4.70 93.35
07/05/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 311 3.18 94.87
12/18/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 1,530 4.49 93.56
06/13/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <500 518 2.82 95.23
12/11/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 413 JB 292 3.79 94.26
12/16/20 <100 5.79 92.26
06/04/21 <100 4.93 93.12
03/02/22 <100 5.96 92.09
05/12/22 <100 4.87 93.18
11/29/22 NS NM NM
06/27/23 <100 4.70 93.35
12/05/23 <100 5.55 92.50
05/28/24 112 3.91 94.14
11/14/24 <100 6.02 92.03
06/12/13 4.09 95.40
08/07/13 4.55 94.94
11/13/13 6.12 93.37
02/17/14 6.04 93.45
04/29/14 5.94 93.55
08/28/14 4.24 95.25
11/20/14 6.10 93.39
02/25/15 6.81 92.68
05/14/15b NA NA NA NA NA NA NA NA 4.92 94.57
06/10/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 1,100 4.50 94.99
12/08/15 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 517 6.00 93.49
06/02/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 13,400 4.87 94.62
12/06/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 350 5.99 93.50
06/19/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 7,500 4.21 95.28
12/27/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 278 6.10 93.39
07/05/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <200 4.49 95.00
12/19/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 381 5.89 93.60
06/13/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <500 612 4.04 95.45
12/11/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 410 JB 500 5.16 94.33
12/16/20 1,750 8.22 91.27
06/04/21 1,850 6.29 93.20
03/02/22 4,700 7.37 92.12
05/12/22 3,050 6.27 93.22
11/29/22 4,950 7.37 92.12
06/27/23 254 6.00 93.49
12/05/23 1,310 7.63 91.86
05/28/24 1,260 5.20 94.29
11/14/24 602 7.38 92.11(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
MW-7
(no longer analyzed as per DERR)
LNAPL = 0.08 ft, not sampled
(no longer analyzed as per DERR)
LNAPL = 0.08 ft, not sampled
LNAPL = 0.02 ft, not sampled
LNAPL = 0.03 ft, not sampled
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
MW-8
LNAPL = 0.08 ft, not sampled
LNAPL = 0.08 ft, not sampled
LNAPL = 0.09 ft, not sampled
LNAPL = 0.07 ft, not sampled
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Broadbent 294 Analytical Tables 2024 SH Page 4 of 8
Benzene Toluene Ethyl
Benzene
Total
Xylenes MTBE Naphth-
alene TPH-GRO TPH-DRO
5 1,000 700 10,000 200 700 1,000 1,000
300 3,000 4,000 10,000 200 700 10,000 10,000
TABLE 2
Groundwater Monitoring and Analytical Results
Pilot Travel Center No. 294
1670 West 12th Street, Ogden (Marriott-Slaterville), Utah
Relative
Groundwater
Elevation
(feet)
Depth to
Groundwater
(feet btoc)a
LNAPL = 0.16 ft, not sampled
Well No.Date
UDEQ ISL
RBCA Tier 1 SL
MW-1
Concentrations (µg/L)
06/12/13 4.31 95.39
08/07/13 4.76 94.94
11/13/13 6.31 93.39
02/17/14 <1.0 <2.0 <2.0 2.9J <2.0 <5.0 <200 <190 6.22 93.48
04/29/14 6.12 93.58
08/28/14 4.47 95.23
11/20/14 6.29 93.41
02/25/15 7.01 92.69
05/14/15 <1.0 <1.0 <1.0 2.4 <1.0 <5.0 <50 289 5.10 94.60
12/08/15 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 216 6.18 93.52
06/01/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 3,170 5.02 94.68
12/07/16 <1.0 <1.0 <1.0 2.3 <1.0 <4.0 <200 23,000 6.16 93.54
06/20/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 25,400 4.38 95.32
12/27/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <200 6.29 93.41
07/05/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 635 4.68 95.02
12/18/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 263 6.07 93.63
06/13/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <500 543 4.23 95.47
12/11/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 454 JB 8,150 5.34 94.36
12/16/20 2,980 5.79 93.91
06/04/21 1,920 6.50 93.20
03/02/22 106 7.55 92.15
05/12/22 1,800 6.49 93.21
11/29/22 NS NM NM
06/27/23 NS NM NM
12/05/23 NS NM NM
05/28/24 NS NM NM
11/14/24 NS NM NM
06/11/13 <1.0 <2.0 <2.0 2.3J <2.0 <5.0 <200 <190 3.60 95.47
08/07/13 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 <190 4.07 95.00
11/13/13 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 <190 5.66 93.41
02/17/14 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 <190 5.62 93.45
04/30/14 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 <190 5.51 93.56
08/28/14 <1.0 <1.0 <1.0 <2.0 <1.0 <2.0 <200 <190 3.80 95.27
11/20/14 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 5.67 93.40
02/25/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 6.41 92.66
05/14/15b NA NA NA NA NA NA NA NA 4.52 94.55
06/10/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 4.09 94.98
12/08/15 5.60 93.47
06/01/16 4.44 94.63
12/06/16 5.61 93.46
06/19/17 3.83 95.24
12/27/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <190 5.75 93.32
07/05/18 4.13 94.94
12/18/18 5.55 93.52
06/13/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <500 <100 3.67 95.40
12/11/19 4.79 94.28
12/16/20 NM NM
06/04/21 <100 5.93 93.14
03/02/22 NM NM
11/29/22 <100 7.04 92.03
06/27/23 <100 5.67 93.40
12/05/23 <100 6.51 92.56
05/28/24 <100 4.85 94.22
11/14/24 NS NM NM(no longer analyzed as per DERR)
Not sampled as per CAP
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
MW-10
MW-9
LNAPL = 0.39 ft, not sampled
LNAPL = 0.22 ft, not sampled
LNAPL = 0.47 ft, not sampled
Not sampled as per CAP
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Not sampled as per CAP
(no longer analyzed as per DERR)
Not sampled as per CAP
Not sampled as per CAP
Not sampled as per CAP
LNAPL = 0.17 ft, not sampled
LNAPL = 0.06 ft, not sampled
Not sampled as per CAP
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Not sampled as per CAP
Not sampled as per CAP
Not sampled as per CAP
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
LNAPL = 0.11 ft, not sampled
LNAPL = 0.06 ft, not sampled
Broadbent 294 Analytical Tables 2024 SH Page 5 of 8
Benzene Toluene Ethyl
Benzene
Total
Xylenes MTBE Naphth-
alene TPH-GRO TPH-DRO
5 1,000 700 10,000 200 700 1,000 1,000
300 3,000 4,000 10,000 200 700 10,000 10,000
TABLE 2
Groundwater Monitoring and Analytical Results
Pilot Travel Center No. 294
1670 West 12th Street, Ogden (Marriott-Slaterville), Utah
Relative
Groundwater
Elevation
(feet)
Depth to
Groundwater
(feet btoc)a
LNAPL = 0.16 ft, not sampled
Well No.Date
UDEQ ISL
RBCA Tier 1 SL
MW-1
Concentrations (µg/L)
04/29/14 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 <190 6.35 93.55
08/28/14 <1.0 <1.0 <1.0 <2.0 <1.0 <2.0 <200 <190 4.57 95.33
11/20/14 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 6.48 93.42
02/25/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 7.22 92.68
05/14/15b NA NA NA NA NA NA NA NA 5.30 94.60
06/10/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 4.83 95.07
12/08/15 6.39 93.51
06/01/16 5.22 94.68
12/06/16 6.38 93.52
06/19/17 4.55 95.35
12/27/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <190 6.53 93.37
07/05/18 4.83 95.07
12/18/18 6.30 93.60
06/13/19 NM NM
12/16/20 NM NM
06/04/21 <100 6.69 93.21
03/02/22 NM NM
06/27/23 <100 6.37 93.53
12/05/23 NS 7.21 92.69
05/28/24 NS 5.54 94.36
11/14/24 <100 7.79 92.11
04/29/14 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 <190 5.60 93.52
08/28/14 <1.0 <1.0 <1.0 <2.0 <1.0 <2.0 <200 <190 3.91 95.21
11/20/14 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 5.77 93.35
02/25/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 6.47 92.65
05/14/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 4.56 94.56
12/08/15 5.67 93.45
06/01/16 4.52 94.60
12/06/16 5.64 93.48
06/19/17 3.88 95.24
12/28/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <190 5.78 93.34
07/05/18 4.18 94.94
12/18/18 5.55 93.57
06/13/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <500 <100 3.70 95.42
12/11/19 4.84 94.28
12/16/20 6.94 92.18
06/04/21 <100 6.58 92.54
03/02/22 NM NM
11/29/22 128 7.05 92.07
06/27/23 <100 5.89 93.23
12/05/23 <100 6.53 92.59
05/28/24 <100 5.00 94.12
11/14/24 <100 7.09 92.03
04/29/14 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 <190 4.22 93.41
08/28/14 <1.0 <1.0 <1.0 <2.0 <1.0 <2.0 <200 298 2.77 94.86
11/20/14 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 280 4.38 93.25
02/25/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 185J 5.07 92.56
05/14/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 3.20 94.43
12/08/15 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 573 4.29 93.34
06/02/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 2,560 3.51 94.12
12/06/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 421 4.25 93.38
06/19/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 680 2.72 94.91
12/28/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 207 4.37 93.26
07/05/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <190 2.85 94.78
12/18/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 <200 4.10 93.53
06/13/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <500 <100 2.49 95.14
12/11/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 409 JB 53.0J 3.50 94.13
12/16/20 <100 6.58 91.05
06/04/21 <100 4.70 92.93
03/02/22 127 5.74 91.89
05/12/22 <100 4.60 93.03
Not sampled as per CAP
(no longer analyzed as per DERR)
No longer sampled or gauged as per CAP
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
No longer sampled or gauged as per CAP
(no longer analyzed as per DERR)
Not sampled as per CAP
Not sampled as per CAP
Not sampled as per CAP
MW-13
MW-12
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Not sampled as per CAP
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Not sampled as per CAP
Not sampled as per CAP
No longer sampled or gauged as per CAP
(no longer analyzed as per DERR)
Not sampled as per CAP
(no longer analyzed as per DERR)
MW-11
Not sampled as per CAP
Not sampled as per CAP
Not sampled as per CAP
Not sampled as per CAP
(no longer analyzed as per DERR)
Not sampled as per CAP
(No longer analyzed as per DERR)
Not sampled as per CAP
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Not sampled as per CAP
Broadbent 294 Analytical Tables 2024 SH Page 6 of 8
Benzene Toluene Ethyl
Benzene
Total
Xylenes MTBE Naphth-
alene TPH-GRO TPH-DRO
5 1,000 700 10,000 200 700 1,000 1,000
300 3,000 4,000 10,000 200 700 10,000 10,000
TABLE 2
Groundwater Monitoring and Analytical Results
Pilot Travel Center No. 294
1670 West 12th Street, Ogden (Marriott-Slaterville), Utah
Relative
Groundwater
Elevation
(feet)
Depth to
Groundwater
(feet btoc)a
LNAPL = 0.16 ft, not sampled
Well No.Date
UDEQ ISL
RBCA Tier 1 SL
MW-1
Concentrations (µg/L)
11/29/22 <100 5.74 91.89
06/27/23 <100 4.65 92.98
12/05/23 <100 5.22 92.41
05/28/24 422 3.76 93.87
11/14/24 NS NM NM
(no longer analyzed as per DERR)
MW-13
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Broadbent 294 Analytical Tables 2024 SH Page 7 of 8
Benzene Toluene Ethyl
Benzene
Total
Xylenes MTBE Naphth-
alene TPH-GRO TPH-DRO
5 1,000 700 10,000 200 700 1,000 1,000
300 3,000 4,000 10,000 200 700 10,000 10,000
TABLE 2
Groundwater Monitoring and Analytical Results
Pilot Travel Center No. 294
1670 West 12th Street, Ogden (Marriott-Slaterville), Utah
Relative
Groundwater
Elevation
(feet)
Depth to
Groundwater
(feet btoc)a
LNAPL = 0.16 ft, not sampled
Well No.Date
UDEQ ISL
RBCA Tier 1 SL
MW-1
Concentrations (µg/L)
04/29/14 <1.0 <2.0 <2.0 <3.0 <2.0 <5.0 <200 356 5.00 93.54
08/28/14 <1.0 <1.0 <1.0 <2.0 <1.0 <2.0 <200 383 3.36 95.18
11/20/14 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 271 5.18 93.36
02/25/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 <190 5.88 92.66
05/14/15 <1.0 <1.0 <1.0 <2.0 <1.0 <5.0 <50 499 4.03 94.51
12/08/15 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 545 5.07 93.47
06/02/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 1,820 4.32 94.22
12/06/16 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 685 5.04 93.50
06/19/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 194J 3.33 95.21
12/28/17 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 464 5.18 93.36
07/05/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 816 3.60 94.94
12/18/18 <1.0 <1.0 <1.0 <1.0 <1.0 <4.0 <200 638 4.95 93.59
06/13/19 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <500 452 3.20 95.34
12/11/19 NA NA
12/16/20 <100 6.29 92.25
06/04/21 171 5.39 93.15
03/02/22 293 6.48 92.06
05/12/22 1,150 5.81 92.73
11/29/22 <100 6.60 91.94
06/27/23 <100 5.15 93.39
12/05/23 <100 5.93 92.61
05/28/24 205 4.33 94.21
11/14/24 <100 6.48 92.06
Data prior to 2020 collected/provided by ATC.
Notes and Abbreviations:
µg/L = micrograms per liter
MTBE = methyl tertiary butyl ether
TPH-GRO = gasoline-range total petroleum hydrocarbons
TPH-DRO = diesel-range total petroleum hydrocarbons MW-1 14.7 3.90 100.00
btoc = below top of casing MW-2 13.3 3.16 99.24
--= Not applicable MW-3 14.3 3.43 98.90
<= analyte concentration is below the specified practical quantitation limit MW-4 12.9 2.71 98.02
NM = not measured MW-5 11.6 1.41 97.56
LNAPL = light non-aqueous phase liquid MW-6 11.5 1.41 98.01
NA = not analyzed for MW-7 11.6 1.41 98.05
UDEQ = Utah Department of Environmental Quality MW-8 11.0 0.75 99.49
ISL = Initial Screening Level MW-9 11.3 1.07 99.70
bold = sample result exceeds UDEQ ISLs MW-10 11.6 1.60 99.07
Depth to water values in italics indicate that water level is above screened interval MW-11 12.6 2.44 99.90
MW-12 12.6 2.38 99.12a= groundwater has been corrected for LNAPL where present. MW-13 12.6 2.41 97.63
See Table 2 for LNAPL thicknesses.MW-14 12.3 2.15 98.54b= for the May 15, 2015 sampling event, 2 of the 4 coolers were delayed by
Fedex, and arrived warm. The affected samples were re-sampled in June.
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Not sampled - inaccessible due to ice
Top of
Casing
Elevation
(feet)
Well No.
Total Well
Depth
(ft btoc)
Top of Screen
(feet btoc)
MW-14
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
(no longer analyzed as per DERR)
Broadbent 294 Analytical Tables 2024 SH Page 8 of 8
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.00
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
50,000
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t
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a
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(
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DATE
GRAPH 2
MW-6 TPH-DRO Concentration vs. Time
Flying J Travel Center No. 294
TPH-DRO Depth to Groundwater
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.00
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
De
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9
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n
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0
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0
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1
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p
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t
o

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o
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(
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DATE
GRAPH 1
MW-3 TPH-DRO Concentration vs. Time
Flying J Travel Center No. 294
TPH-DRO Depth to Groundwater
Samples not collected when
LNAPL detected in well
Page 1 of 2
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.00
5,000
10,000
15,000
20,000
25,000
30,000
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DATE
GRAPH 4
MW-9 TPH-DRO Concentration vs. Time
Flying J Travel Center No. 294
TPH-DRO Depth to Groundwater
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.00
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
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GRAPH 3
MW-8 TPH-DRO Concentration vs. Time
Flying J Travel Center No. 294
TPH-DRO Depth to Groundwater
Page 2 of 2
APPENDIX A
FIELD METHODS

Page 1 of 4

QUALITY ASSURANCE/QUALITY CONTROL
FIELD METHODS

Field methods discussed herein were implemented to provide for accuracy and reliability of field
activities, data collection, sample collection, and handling. Discussion of these methods is
provided below.

1.0 EQUIPMENT CALIBRATION

Equipment calibration was performed per equipment manufacturer specifications before use.

2.0 DEPTH TO GROUNDWATER AND LIGHT NON-AQUEOUS PHASE LIQUID MEASUREMENT

Depth to groundwater was measured in wells identified for gauging in the scope of work using a
decontaminated water level indicator. The depth to water measurement was taken from a cut
notch or permanent mark at the top of the well casing to which the well head elevation was
originally surveyed.

Once depth to water was measured, an oil/water interface meter or a new disposable bailer was
utilized to evaluate the presence and, if present, to measure the “apparent” thickness of light
non-aqueous phase liquid (LNAPL) in the well. If LNAPL was present in the well, groundwater
purging and sampling were not performed, unless sampling procedures in the scope of work
specified collection of samples in the presence of LNAPL. Otherwise, time allowing, LNAPL was
bailed from the well using either a new disposable bailer, or the disposal bailer previously used
for initial LNAPL assessment. Bailing of LNAPL continued until the thickness of LNAPL (or volume)
stabilized in each bailer pulled from the well, or LNAPL was no longer present. After LNAPL
thickness either stabilized or was eliminated, periodic depth to water and depth to LNAPL
measurements were collected as product came back into the well to evaluate product recovery
rate and to aid in further assessment of LNAPL in the subsurface. LNAPL thickness
measurements were recorded as “apparent.” If a bailer was used for LNAPL thickness
measurement, the field sampler noted the bailer entry diameter and chamber diameter to
enable correction of thickness measurements. Recovered LNAPL was stored on-site in a labeled
steel drum(s) or other appropriate container(s) prior to disposal.

3.0 WELL PURGING AND GROUNDWATER SAMPLE COLLECTION

Well purging and groundwater sampling were performed in wells specified in the scope of work
after measuring depth to groundwater and evaluating the presence of LNAPL. Purging and
sampling were performed using one of the methods detailed below. The method used was
noted in the field records. Purge water was stored on-site in labeled steel drum(s) or other
appropriate container(s) prior to disposal or on-site treatment (in cases where treatment using
an on-site system is authorized).

Broadbent & Associates, Inc. Quality Assurance/Quality Control
Field Methods
Page 2 of 4
3.1 Purging a Predetermined Well Volume

Purging a predetermined well volume is performed per ASTM International (ASTM)
D4448-01. This purging method has the objective of removing a predetermined volume
of stagnant water from the well prior to sampling. The volume of stagnant water is
defined as either the volume of water contained within the well casing, or the volume
within the well casing and sand/gravel in the annulus if natural flow through these is
deemed insufficient to keep them flushed out.

This purging method involves removal of a minimum of three stagnant water volumes
from the well using a decontaminated pump with new disposable plastic discharge or
suction tubing, dedicated well tubing, or using a new disposable or decontaminated
reusable bailer. If a new disposable bailer was used for assessment of LNAPL, that bailer
may be used for purging. The withdrawal rate used is one that minimizes drawdown
while satisfying time constraints.

To evaluate when purging is complete, one or more groundwater stabilization
parameters are monitored and recorded during purging activities until stabilization is
achieved. Most commonly, stabilization parameters include temperature, conductivity,
and pH, but field procedures detailed in the scope of work may also include monitoring
of dissolved oxygen concentrations, oxidation reduction potential, and/or turbidity1.
Parameters are considered stable when two (2) consecutive readings recorded three (3)
minutes apart fall within ranges provided below in Table 1. In the event that the
parameters have not stabilized and five (5) well casing volumes have been removed,
purging activities will cease and be considered complete. Once the well is purged, a
groundwater sample(s) is collected from the well using a new disposable bailer. If a new
disposable bailer was used for purging, that bailer may be used to collect the sample(s).
A sample is not collected if the well is inadvertently purged dry.

Table 1. Criteria for Defining Stabilization of Water-Quality Indicator Parameters
Parameter Stabilization Criterion
Temperature ± 0.2ºC (± 0.36ºF)
pH ± 0.1 standard units
Conductivity ± 3%
Dissolved oxygen ± 10%
Oxidation reduction potential ± 10 mV
Turbidity1 ± 10% or 1.0 NTU (whichever is greater)

3.2 Low-Flow Purging and Sampling

“Low-Flow”, “Minimal Drawdown”, or "Low-Stress” purging is performed per ASTM
D6771-02. It is a method of groundwater removal from within a well’s screened interval
that is intended to minimize drawdown and mixing of the water column in the well

1 As stated in ASTM D6771-02, turbidity is not a chemical parameter and not i ndicative of when formation-quality water is being
purged; however, turbidity may be helpful in evaluating stress on the formation during purging. Turbidity measurements are t aken
at the same time that stabilization parameter measurements are made, or, at a minimum, once when purging is initiated and again
just prior to sample collection, after stabilization parameters have stabilized. To avoid artifacts in sample analysis, turb idity should
be as low as possible when samples are collected. If turbidity values are persistently high, the withdrawal rate is lowered until
turbidity decreases. If high turbidity persists even after lowering the withdrawal rate, the purging is stopped for a period of time
until turbidity settles, and the purging process is then restarted. If this fails to solve the problem, the purging/sampling process for
the well is ceased, and well maintenance or redevelopment is considered.

Broadbent & Associates, Inc. Quality Assurance/Quality Control
Field Methods
Page 3 of 4
casing. This is accomplished by pumping the well using a decontaminated pump with
new disposable plastic discharge or suction tubing or dedicated well tubing at a low flow
rate while evaluating the groundwater elevation during pumping.

The low flow pumping rate is well specific and is generally established at a volume that
is less than or equal to the natural recovery rate of the well. A pump with adjustable
flow rate control is positioned with the intake at or near the mid-point of the
submerged well screen. The pumping rate used during low-flow purging is low enough
to minimize mobilization of particulate matter and drawdown (stress) of the water
column. Low-flow purging rates will vary based on the individual well characteristics;
however, the purge rate should not exceed 1.0 Liter per minute (L/min) or 0.25 gallon
per minute (gal/min). Low-flow purging should begin at a rate of approximately
0.1 L/min (0.03 gal/min)2, or the lowest rate possible, and be adjusted based on an
evaluation of drawdown. Water level measurements should be recorded at approximate
one (1) to two (2) minute intervals until the low-flow rate has been established, and
drawdown is minimized. As a general rule, drawdown should not exceed 25% of the
distance between the top of the water column and the pump in-take.

To evaluate when purging is complete, one or more groundwater stabilization
parameters are monitored and recorded during purging activities until stabilization is
achieved. Most commonly, stabilization parameters include temperature, conductivity,
and pH, but field procedures detailed in the scope of work may also include monitoring
of dissolved oxygen concentrations, oxidation reduction potential, and/or turbidity1.
The frequency between measurements will be at an interval of one (1) to three (3)
minutes; however, if a flow cell is used, the frequency will be determined based on the
time required to evacuate one cell volume. Stabilization is defined as three (3)
consecutive readings recorded several minutes apart falling within ranges provided in
Table 1. Samples will be collected by filling appropriate containers from the pump
discharge tubing at a rate not to exceed the established pumping rate.

3.3 Minimal Purge, Discrete Depth, and Passive Sampling

In accordance with ASTM D4448-01, sampling techniques that do not rely on purging, or
require only minimal purging, may be used if a particular zone within a screened interval
is to be sampled or if a well is not capable of yielding sufficient groundwater for purging.
To properly use these sampling techniques, a water sample is collected within the
screened interval with little or no mixing of the water column within the casing. These
techniques include minimal purge sampling which uses a dedicated sampling pump
capable of pumping rates of less than 0.1 L/min (0.03 gal/min)2, discrete depth sampling
using a bailer that allows groundwater entry at a controlled depth (e.g. differential
pressure bailer), or passive (diffusion) sampling. These techniques are based on certain
studies referenced in ASTM D4448-01 that indicate that under certain conditions,
natural groundwater flow is laminar and horizontal with little or no mixing within the
well screen.

2 According to ASTM D4448-01, studies have indicated that at flow rates of 0.1 L/min, low -density polyethylene (LDPE) and
plasticized polypropylene tubing materials are prone to sorption. Therefore, TFE -fluorocarbon or other appropriate tubing material
is used, particularly when tubing lengths of 50 feet or longer are used.

Broadbent & Associates, Inc. Quality Assurance/Quality Control
Field Methods
Page 4 of 4

4.0 DECONTAMINATION

Reusable groundwater sampling equipment were cleaned using a solution of Alconox or other
acceptable detergent, rinsed with tap water, and finally rinsed with distilled water prior to use in
each well. Decontamination water was stored on-site in appropriately labeled DOT approved
steel drum(s) or other appropriate container(s) prior to disposal.

5.0 SAMPLE CONTAINERS, LABELING, AND STORAGE

Samples were collected in laboratory prepared containers with appropriate preservative (if
preservative was required). Samples were labeled (site name, sample I.D., sampler initials, date,
and time of collection) and stored chilled (refrigerator or ice chest with ice) until delivery to a
certified laboratory, under chain of custody procedures.

6.0 CHAIN OF CUSTODY RECORD AND PROCEDURE

The field sampler was personally responsible for care and custody of the samples collected until
they were properly transferred to another party. To document custody and transfer of samples,
a Chain of Custody Record was prepared. The Chain of Custody Record provided identification of
the samples corresponding to sample labels and specified analyses to be performed by the
laboratory. The original Chain of Custody Record accompanied the shipment, and a copy of the
record was stored in the project file. When the samples were transferred, the individuals
relinquishing and receiving them signed, dated, and noted the time of transfer on the record.

7.0 FIELD RECORDS

Daily Report and data forms were completed by staff personnel to provide daily record of
significant events, observations, and measurements. Field records were signed, dated, and
stored in the project file.

APPENDIX B

FIELD DATA SHEETS

APPENDIX C

LABORATORY REPORT
AND CHAIN-OF-CUSTODY DOCUMENTATION
ANALYTICAL REPORT
December 03, 2024
Broadbent & Associates - UT Pilot
Sample Delivery Group:L1800990
Samples Received:11/16/2024
Project Number:294-605-13
Description:One Niner 294 - Marriott - Slaterville
Site:19-14-107
Report To:Sarah Hamilton
186 East Main Street
Suite 99
Sandy, UT 84070
Entire Report Reviewed By:
December 03, 2024
[Preliminary Report]
Jeff Carr
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:
Broadbent & Associates - UT Pilot 294-605-13 L1800990 12/03/24 19:23 1 of 21
December 04, 2024
Jeff Carr
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Broadbent & Associates - UT Pilot 294-605-13 L1800990 12/04/24 07:31 1 of 21
TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 5
Sr: Sample Results 6
MW-1 L1800990-01 6
MW-2 L1800990-02 7
MW-3 L1800990-03 8
MW-4 L1800990-04 9
MW-5 L1800990-05 10
MW-6 L1800990-06 11
MW-7 L1800990-07 12
MW-8 L1800990-08 13
MW-11 L1800990-09 14
MW-12 L1800990-10 15
MW-14 L1800990-11 16
Qc: Quality Control Summary 17
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 17
Gl: Glossary of Terms 18
Al: Accreditations & Locations 19
Sc: Sample Chain of Custody 20
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-1 L1800990-01 GW Sarah Hamilton 11/14/24 09:50 11/16/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2407202 1 11/23/24 17:51 11/28/24 10:34 MAA Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-2 L1800990-02 GW Sarah Hamilton 11/14/24 10:25 11/16/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2407202 1 11/23/24 17:51 11/28/24 10:53 JAS Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-3 L1800990-03 GW Sarah Hamilton 11/14/24 12:00 11/16/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2407202 1 11/23/24 17:51 11/28/24 11:13 MAA Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-4 L1800990-04 GW Sarah Hamilton 11/14/24 13:05 11/16/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2407202 1 11/23/24 17:51 11/28/24 11:33 JAS Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-5 L1800990-05 GW Sarah Hamilton 11/14/24 14:10 11/16/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2407202 1 11/23/24 17:51 11/28/24 11:52 MAA Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-6 L1800990-06 GW Sarah Hamilton 11/14/24 12:35 11/16/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2407202 1 11/23/24 17:51 11/28/24 12:12 MAA Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-7 L1800990-07 GW Sarah Hamilton 11/14/24 14:30 11/16/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2407202 1 11/23/24 17:51 11/28/24 12:32 MAA Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-8 L1800990-08 GW Sarah Hamilton 11/14/24 10:55 11/16/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2407202 1 11/23/24 17:51 11/28/24 12:51 JAS 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-11 L1800990-09 GW Sarah Hamilton 11/14/24 15:15 11/16/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2407202 1 11/23/24 17:51 11/28/24 13:11 JAS Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-12 L1800990-10 GW Sarah Hamilton 11/14/24 13:35 11/16/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2407202 1 11/23/24 17:51 11/28/24 13:31 JAS Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-14 L1800990-11 GW Sarah Hamilton 11/14/24 12:40 11/16/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG2407202 1 11/23/24 17:51 11/28/24 13:50 MAA 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]
Jeff Carr
Project Manager
Sample Delivery Group (SDG) Narrative
pH outside of method requirement.
Lab Sample ID Project Sample ID Method
L1800990-02 MW-2 3511/8015
L1800990-04 MW-4 3511/8015
L1800990-08 MW-8 3511/8015
L1800990-09 MW-11 3511/8015
L1800990-10 MW-12 3511/8015
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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Jeff Carr
Project Manager
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SAMPLE RESULTS - 01
L1800990
MW-1
Collected date/time: 11/14/24 09:50
Semi-Volatile Organic Compounds (GC) by Method 3511/8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
DRO w/ SGT 149 100 1 11/28/2024 10:34 WG2407202
(S) o-Terphenyl 74.7 52.0-156 11/28/2024 10:34 WG2407202
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
L1800990
MW-2
Collected date/time: 11/14/24 10:25
Semi-Volatile Organic Compounds (GC) by Method 3511/8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
DRO w/ SGT ND 100 1 11/28/2024 10:53 WG2407202
(S) o-Terphenyl 73.7 52.0-156 11/28/2024 10:53 WG2407202
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
L1800990
MW-3
Collected date/time: 11/14/24 12:00
Semi-Volatile Organic Compounds (GC) by Method 3511/8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
DRO w/ SGT 3660 100 1 11/28/2024 11:13 WG2407202
(S) o-Terphenyl 73.2 52.0-156 11/28/2024 11:13 WG2407202
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
L1800990
MW-4
Collected date/time: 11/14/24 13:05
Semi-Volatile Organic Compounds (GC) by Method 3511/8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
DRO w/ SGT 514 100 1 11/28/2024 11:33 WG2407202
(S) o-Terphenyl 77.4 52.0-156 11/28/2024 11:33 WG2407202
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
L1800990
MW-5
Collected date/time: 11/14/24 14:10
Semi-Volatile Organic Compounds (GC) by Method 3511/8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
DRO w/ SGT 112 100 1 11/28/2024 11:52 WG2407202
(S) o-Terphenyl 80.5 52.0-156 11/28/2024 11:52 WG2407202
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
L1800990
MW-6
Collected date/time: 11/14/24 12:35
Semi-Volatile Organic Compounds (GC) by Method 3511/8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
DRO w/ SGT 1220 100 1 11/28/2024 12:12 WG2407202
(S) o-Terphenyl 80.0 52.0-156 11/28/2024 12:12 WG2407202
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
L1800990
MW-7
Collected date/time: 11/14/24 14:30
Semi-Volatile Organic Compounds (GC) by Method 3511/8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
DRO w/ SGT ND 100 1 11/28/2024 12:32 WG2407202
(S) o-Terphenyl 74.2 52.0-156 11/28/2024 12:32 WG2407202
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
L1800990
MW-8
Collected date/time: 11/14/24 10:55
Semi-Volatile Organic Compounds (GC) by Method 3511/8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
DRO w/ SGT 602 100 1 11/28/2024 12:51 WG2407202
(S) o-Terphenyl 68.9 52.0-156 11/28/2024 12:51 WG2407202
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
L1800990
MW-11
Collected date/time: 11/14/24 15:15
Semi-Volatile Organic Compounds (GC) by Method 3511/8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
DRO w/ SGT ND 100 1 11/28/2024 13:11 WG2407202
(S) o-Terphenyl 73.7 52.0-156 11/28/2024 13:11 WG2407202
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 10
L1800990
MW-12
Collected date/time: 11/14/24 13:35
Semi-Volatile Organic Compounds (GC) by Method 3511/8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
DRO w/ SGT ND 100 1 11/28/2024 13:31 WG2407202
(S) o-Terphenyl 80.0 52.0-156 11/28/2024 13:31 WG2407202
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
L1800990
MW-14
Collected date/time: 11/14/24 12:40
Semi-Volatile Organic Compounds (GC) by Method 3511/8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
DRO w/ SGT ND 100 1 11/28/2024 13:50 WG2407202
(S) o-Terphenyl 72.6 52.0-156 11/28/2024 13:50 WG2407202
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2407202
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 L1800990-01,02,03,04,05,06,07,08,09,10,11
Method Blank (MB)
(MB) R4152436-1 11/27/24 09:51
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
DRO w/ SGT U 24.7 100
(S) o-Terphenyl 77.5 52.0-156
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4152436-2 11/27/24 10:10 • (LCSD) R4152436-3 11/27/24 10:30
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
DRO w/ SGT 1500 1040 1140 69.3 76.0 50.0-150 9.17 20
(S) o-Terphenyl 68.0 66.0 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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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.
ND Not detected at the Reporting Limit (or MDL where applicable).
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.
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
The remainder of this page intentionally left blank, there are no qualifiers applied to this SDG.
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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