DERR-2024-004882

MAVERIK, INC.
185 S State Street #800
Salt Lake, UT 84111
Phone: [phone]
E-mail: [e-mail]
September 29, 2023

Eileen Brennan
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

RE: Maverik Store #314
Initial Site and Subsurface Investigation
795 S. State St.
Orem, UT 84058
Facility ID# 1000371
Release OIS

Dear Ms. Brennan:

The enclosed report by Maverik, Inc. (Maverik) summarizes the gasoline-fuel release that was reported
to the DERR on 9/7/2023 from our Orem, Utah #314 store (795 S. State St., Facility ID 1000371) and
the subsequent investigation and repairs that took place.

Identification of the Release
Initial alarms and subsequent line testing identified a potential release out of the premium product line
on 9/6/2023. The premium line was immediately capped and taken out of service by our fuel service
vendor (CSESCO), Maverik notified the DERR of the potential release, and additional line
testing/verification (include inert gas testing) was conducted. The source of the leak/release was
determined to be directly under the dispenser 1/2 (the dispenser furthest southeast in the canopy) as
the result of a corroded flexible pipe/elbow connection (see Figure 1 below). There is no Under-
Dispenser Containment at this facility.

Ms. Eileen Brennan
September 29, 2023
Page 2

Figure 1. Corroded flexible piping around pipe elbow.

Investigation
Maverik personnel confirmed the leak with a MiniRAE 2000 portable VOC meter that showed elevated
PID readings at the depth just below the elbow connection (approximately 4.5 feet below ground
surface). Stained soils and a strong hydrocarbon odor were also noticed. Using hand-tools, Maverik
dug out a narrow pit below Dispenser 1/2. The extent of the excavation was limited due to the presence
of conduits and potential instability of the dispenser island.

Four soil samples were collected for laboratory analysis from the following locations: SS-1: directly
below the compromised elbow @ 4.5 feet bgs, SS-2: directly below the elbow at @5.0 feet bgs, SS-3:
approximately 52 inches bgs and 32 inches northwest of the impacted elbow, and SS-4: approximately
52 inches bgs and 32 inches northwest of the elbow. The soil sample were taken to Chemtech Ford
Laboratories in Sandy, UT for analysis of benzene, toluene, ethylbenzene, xylenes, naphthalene,
MTBE, total petroleum hydrocarbon-gasoline range organics (TPH-GRO), and total petroleum
hydrocarbon-diesel range organics (TPH-DRO).

Ms. Eileen Brennan
September 29, 2023
Page 3
The laboratory analytical results, as shown in Table 1, for the soil samples show concentrations above
RBCA Tier 1 Screening Levels for benzene, ethylbenzene, toluene, xylenes, and TPH-GRO in soil
samples SS-1, SS-2, and SS-3. All constituents analyzed for soil sample SS-4 were below detection
levels.

An additional soil sample was taken, identified as SS-5, from the excavated area to determine the
Unified Soil Classification (USC). The results identified the material as GW, which is classified as “well
graded gravel” comprised of a gravel-sand mixture with little or no fines.

Release Volumes
The leak was determined to have started no earlier than August 16th and had a maximum leak rate of
1.24 gallons per hour (at 50 psi in which it is tested, which is well above actual operating pressures).
Inventory Reconciliation Reports for the Premium system showed that between 8/16/2023 – 9/6/2023,
about 85 gallons (which was within allowable variances) were not accounted for by the dispenser sales.

Waste Removal
All excavated soil was collected and hauled offsite for proper disposal. In total, approximately 2980
pounds of petroleum impacted waste solids were taken to the Sump & Trap Cleaning facility in Salt
Lake City. The associated waste manifest is attached.

Repairs
CSESCO replaced all sections of the premium line that were compromised, backfilled the area under
the dispenser, and tested the line. The premium line was then put back into service on 9/14/2023.
Concrete was later replaced to complete the repairs.

Conclusions
Based on review of the site and soil conditions, along with the analytical results, it appears that the
leaked fuel went vertically, straight down. At 5 feet bgs, which was the deepest that we could excavate
at the time, there was residual contamination above RBCA Tier 1 Screening Levels. A sample taken
at 52 inches bgs but offset by about 32 inches to the northwest, still showed concentrations above
RBCA Tier I SLs, but the concentrations were very noticeably lower than directly below the leak. A
sample taken at 52 inches bgs but offset by about 32 inches to the southwest was non-detect for all
Ms. Eileen Brennan
September 29, 2023
Page 4
constituents analyzed. Please note that based on a previous investigation at this site (in 2009),
groundwater is anticipated to be >70 feet below ground surface and therefore it is highly unlikely that
groundwater was impacted.

Maverik respectfully requests your guidance and direction as to required next steps. Please contact
me at 801.438.4884 or [e-mail] should you have any questions.

Sincerely,
Maverik, Inc.

Mark Stewart
Senior Environmental Engineer and Response Manager

Attachments:

Figure 2 – Site Location Map
Table 1 – Summary of Soil Analytical Data

Attachment 1: Waste Manifest
Attachment 2: Laboratory Analysis Report: Chemtech Ford 23I1034
OREM, UTAH
MAVERIK STORE #314
DATE PREPARED: 09-29-2023
FIGURE 2
INITIAL SITE INVESTIGATION
SALT LAKE CITY, UTAH 84111
185 S. State St. #800
ENVIRONMENTAL DEPARTMENT
MAVERIK, INC.
Site Location Map
Soil
Classification BENZENE Ethylbenzene MTBE NAPHTHALENE Toluene Xylenes TPH-GRO TPH-DRO
SS-1 09/13/23 4.5 900.0 2.8 60.3 <0.1 12.6 173 370 2860 1550
SS-2 09/13/23 5.0 850.0 6.99 65.1 <0.1 13.0 183 406 3070 1520
SS-3 09/13/23
52 inches (and 32
inches northwest)60 0.42 34.9 <0.11 9.18 73.1 233 1720 1630
SS-4 09/13/23
52 inches (and 32
inches southwest)25 <0.11 <0.27 <0.11 <0.27 <0.27 <0.27 <2.71 <54
SS-5 09/13/23 GW
0.2 5 0.3 51 9 142 150 500
0.9 23 0.3 51 25 142 1,500 5,000
Notes:1. Samples analyzed by Chemtech-Ford Laboratories of Salt Lake City.
2. Bolded values, if any, represent concentration exceeding RBCA Tier 1 SLs.
GW = well graded gravels, gravel-sand mixtures, little or no fines
RBCA Tier 1 SLs
SAMPLE
IDENTIFICATION
TABLE 1
SUMMARY OF SOIL QUALITY
Orem 314
DATE
Initital Screening Levels (ISLs)
ANALYTE CONCENTRATIONS (mg/kg)Sample Depth
(ft)
PID
(ppm)
Page 1 of 1

Attachment 1: Waste Manifest

Attachment 2: Laboratory Analysis Report
Chemtech Ford 23I1034

The analyses presented on this report were performed in accordance with the
National Environmental Laboratory Accreditation Program (NELAP) unless
noted in the comments, flags, or case narrative. If the report is to be used for
regulatory compliance, it should be presented in its entirety, and not be
altered.
Client Service Contact: 801.262.7299
Maverik, Inc.
Attn: Mark Stewart
185 S State Street Suite 800
Salt Lake City, UT 84111
Work Order: 23I1034
Project: Orem 313
9/21/2023
Approved By:
Reed Hendricks, Lab Director
9632 South 500 West Sandy, Utah 84070
Serving the Intermountain West since 1953
801.262.7299 Main 866.792.0093 Fax www.ChemtechFord.com
Page 1 of 8
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Maverik, Inc.
Mark Stewart
185 S State Street Suite 800
Salt Lake City, UT 84111
PO#:
Receipt:
Date Reported:
Project Name:
01-313-7080-11
9/14/23 8:16 @ -0.3 °C
9/21/2023
Orem 313
Sample ID: SS-1
Lab ID: 23I1034-01Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 9/13/23 11:30
Preparation
Date/Time
Sampled By: Mark Stewart
Minimum
Reporting
Limit MethodResult
Inorganic
%9/21/239/20/230.1 CTF800096.6Total Solids
MBTEXn
mg/kg dry 9/14/239/14/230.10 EPA 8260D/5030B2.80Benzene
mg/kg dry 9/14/239/14/2325.0 EPA 8260D/5030B60.3Ethylbenzene
mg/kg dry 9/14/239/14/230.10 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/kg dry 9/14/239/14/230.25 EPA 8260D/5030B12.6Naphthalene
mg/kg dry 9/14/239/14/2325.0 EPA 8260D/5030B173Toluene
mg/kg dry 9/14/239/14/2325.0 EPA 8260D/5030B370Xylenes, total
Gasoline Range
mg/kg dry 9/14/239/14/2325.0 EPA 8260B/C 5035A/[CALC]2860Gasoline Range Organics
Diesel Range
mg/kg dry 9/14/239/14/2350EPA 8015 C1550Diesel Range Organics
Project Name: Orem 313 CtF WO#: 23I1034
www.ChemtechFord.com
Page 2 of 8Page 2 of 8
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Maverik, Inc.
Mark Stewart
185 S State Street Suite 800
Salt Lake City, UT 84111
PO#:
Receipt:
Date Reported:
Project Name:
01-313-7080-11
9/14/23 8:16 @ -0.3 °C
9/21/2023
Orem 313
Sample ID: SS-2
Lab ID: 23I1034-02Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 9/13/23 11:40
Preparation
Date/Time
Sampled By: Mark Stewart
Minimum
Reporting
Limit MethodResult
Inorganic
%9/15/239/14/230.1 CTF800096.6Total Solids
MBTEXn
mg/kg dry 9/14/239/14/230.10 EPA 8260D/5030B6.99Benzene
mg/kg dry 9/14/239/14/232.50 EPA 8260D/5030B65.1Ethylbenzene
mg/kg dry 9/14/239/14/230.10 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/kg dry 9/14/239/14/230.25 EPA 8260D/5030B13.0Naphthalene
mg/kg dry 9/14/239/14/232.50 EPA 8260D/5030B183Toluene
mg/kg dry 9/14/239/14/232.50 EPA 8260D/5030B406Xylenes, total
Gasoline Range
mg/kg dry 9/14/239/14/232.50 EPA 8260B/C 5035A/[CALC]3070Gasoline Range Organics
Diesel Range
mg/kg dry 9/14/239/14/2350EPA 8015 C1520Diesel Range Organics
Project Name: Orem 313 CtF WO#: 23I1034
www.ChemtechFord.com
Page 3 of 8Page 3 of 8
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Maverik, Inc.
Mark Stewart
185 S State Street Suite 800
Salt Lake City, UT 84111
PO#:
Receipt:
Date Reported:
Project Name:
01-313-7080-11
9/14/23 8:16 @ -0.3 °C
9/21/2023
Orem 313
Sample ID: SS-3
Lab ID: 23I1034-03Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 9/13/23 11:45
Preparation
Date/Time
Sampled By: Mark Stewart
Minimum
Reporting
Limit MethodResult
Inorganic
%9/15/239/14/230.1 CTF800093.3Total Solids
MBTEXn
mg/kg dry 9/14/239/14/230.11 EPA 8260D/5030B0.42Benzene
mg/kg dry 9/14/239/14/232.68 EPA 8260D/5030B34.9Ethylbenzene
mg/kg dry 9/14/239/14/230.11 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/kg dry 9/14/239/14/230.27 EPA 8260D/5030B9.18Naphthalene
mg/kg dry 9/14/239/14/232.68 EPA 8260D/5030B73.1Toluene
mg/kg dry 9/14/239/14/232.68 EPA 8260D/5030B233Xylenes, total
Gasoline Range
mg/kg dry 9/14/239/14/232.68 EPA 8260B/C 5035A/[CALC]1720Gasoline Range Organics
Diesel Range
mg/kg dry 9/14/239/14/2354EPA 8015 C1630Diesel Range Organics
Project Name: Orem 313 CtF WO#: 23I1034
www.ChemtechFord.com
Page 4 of 8Page 4 of 8
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Maverik, Inc.
Mark Stewart
185 S State Street Suite 800
Salt Lake City, UT 84111
PO#:
Receipt:
Date Reported:
Project Name:
01-313-7080-11
9/14/23 8:16 @ -0.3 °C
9/21/2023
Orem 313
Sample ID: SS-4
Lab ID: 23I1034-04Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 9/13/23 11:50
Preparation
Date/Time
Sampled By: Mark Stewart
Minimum
Reporting
Limit MethodResult
Inorganic
%9/15/239/14/230.1 CTF800092.1Total Solids
MBTEXn
mg/kg dry 9/14/239/14/230.11 EPA 8260D/5030BNDBenzene
mg/kg dry 9/14/239/14/230.27 EPA 8260D/5030BNDEthylbenzene
mg/kg dry 9/14/239/14/230.11 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/kg dry 9/14/239/14/230.27 EPA 8260D/5030BNDNaphthalene
mg/kg dry 9/14/239/14/230.27 EPA 8260D/5030BNDToluene
mg/kg dry 9/14/239/14/230.27 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/kg dry 9/14/239/14/232.71 EPA 8260B/C 5035A/[CALC]NDGasoline Range Organics
Diesel Range
mg/kg dry 9/14/239/14/2354EPA 8015 CNDDiesel Range Organics
Project Name: Orem 313 CtF WO#: 23I1034
www.ChemtechFord.com
Page 5 of 8Page 5 of 8
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Maverik, Inc.
Mark Stewart
185 S State Street Suite 800
Salt Lake City, UT 84111
PO#:
Receipt:
Date Reported:
Project Name:
01-313-7080-11
9/14/23 8:16 @ -0.3 °C
9/21/2023
Orem 313
Sample ID: SS-5
Lab ID: 23I1034-05Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 9/13/23 13:30
Preparation
Date/Time
Sampled By: Mark Stewart
Minimum
Reporting
Limit MethodResult
Inorganic
-9/20/239/20/23ASTM D2487-ModGWUnited Soil Classification [USC]
Project Name: Orem 313 CtF WO#: 23I1034
www.ChemtechFord.com
Page 6 of 8Page 6 of 8
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Maverik, Inc.
Mark Stewart
185 S State Street Suite 800
Salt Lake City, UT 84111
PO#:
Receipt:
Date Reported:
Project Name:
01-313-7080-11
9/14/23 8:16 @ -0.3 °C
9/21/2023
Orem 313
Report Footnotes
Abbreviations
ND = Not detected at the corresponding Minimum Reporting Limit (MRL).
1 mg/L = one milligram per liter or 1 mg/kg = one milligram per kilogram = 1 part per million.
1 ug/L = one microgram per liter or 1 ug/kg = one microgram per kilogram = 1 part per billion.
1 ng/L = one nanogram per liter or 1 ng/kg = one nanogram per kilogram = 1 part per trillion.
On calculated parameters, there may be a slight difference between summing the rounded values shown on the report
vs the unrounded values used in the calculation.
Project Name: Orem 313 CtF WO#: 23I1034
www.ChemtechFord.com
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