DERR-2024-010246

Closure Packet
Maverik #314 located at 795 South State Street, Orem
Facility 1000317 Release OIS
Table of Contents:
1. Closure memo (insert when signed)
2. Site Overview
3. Blue Stakes Flyer
4. RBCA Tier 1Worksheet
5. Soil Samples
6. Site Maps
7. Bore Logs
8. Water Rights Map
9. Groundwater Protection Zone Map
MEMORANDUM
TO: Morgan Atkinson, PST Branch Manager
Division of Environmental Response and Remediation
THROUGH:Chris Howell, LPST Section Manager
Division of Environmental Response and Remediation
Scott Everett, Toxicologist
Division of Environmental Response and Remediation
FROM: Liberty Coe, LPST/ Project Manager
Division of Environmental Response and Remediation
DATE: August 21, 2024
SUBJECT: No Further Action Leaking Petroleum Storage Tank - Closure Review Memo
Maverik #314 located at 795 South State Street, Orem, Utah
Facility Identification No. 1000317, Release Site OIS
A petroleum release from an underground pipe was reported to the Division of Environmental Response
and Remediation (DERR) on September 6, 2024. The release was reported to the DERR based on a
failed line tightness test. The extent and degree of contamination has been fully defined and a No Further
Action (NFA) review is hereby requested.
Due to residual contamination that is to remain in place, this release was discussed at Closure
Committee on August 21, 2024. In this meeting it was decided that the DERR will utilize Blue Stakes
of Utah and create a contamination map to supplement the NFA letter to alert excavators who may
work in the area.
The NFA package with supporting documents can be found here:
https://drive.google.com/file/d/1DrhHAJIiul2G9plVcDbTjCPpIja59jDD/view?usp=drive_link
Please initial this memo when your closure package review is complete. If you have questions, comments
or concerns with the closure, please discuss with the project manager or request a closure committee
discussion.
Once this memo is complete, the NFA letter will be initiated through Adobe Sign for final signatures.
Maverik #314 located at 795 South State Street, Orem
Facility 1000317 Release OIS
Site Overview:
This site is an active Maverik gas station in Orem. At some point in the three week period from
August 16, 2023 through September 6, 2023 there was a release of gasoline to the soil. It is
unknown how much fuel was released or when it started but Inventory Reconciliation Reports
determined that it was likely around 85 gallons. The release was caused by a corroded flexible
pipe connection and occurred directly under dispenser 1/2. When internal alarms signaled on
September 6, the line was immediately shut off for repairs.
Initial abatement for the release was conducted on September 13, 2023. 2290 lbs of soil was
excavated from below dispenser 1/2 and taken for proper disposal at the Sump and Trap
Cleaning Facility in Salt Lake. Four confirmation samples were collected, 3 of which contained
petroleum constituents above Tier 1 Screening Levels. Since the release occurred directly under
the dispenser, clean up was limited due to concerns of the dispenser collapsing into the
excavation. As much soil as possible was removed with hand tools but some was left in place.
The dispenser would need to be removed in order to excavate any further.
A subsurface investigation was conducted on December 22, 2023. However, the two soil borings
(B-1 and B-2) were not drilled in the locations originally proposed because the boom height of
the drill rig was too high to drill under the canopy and adjacent to the dispenser as planned.
On May 29, 2024 a soil auger was used to collect one additional soil sample (B-3) 10 feet from
dispenser 1/2.
None of the samples collected contained petroleum constituents above Initial Screening Levels.
A previous subsurface investigation at this site determined groundwater was at a depth of 70 feet
below the ground surface (bgs). Water Right 55-321 is located 815 feet away. The site is located
within groundwater protection zone 3.
Due to the degree of contamination that will be left in place, the site will be added to Blue Stakes
of Utah and a contamination map will be developed to alert construction personnel of the
contamination.
Nature and Extent of Contamination:
The broken pipe connection was located at 4.5 feet bgs.Confirmation samples were taken at the
time of initial abatement and labeled SS-1 through SS-4.
Samples taken at 4.5 (SS-1)and 5 (SS-2)feet bgs directly underneath the pipe contained high
concentrations of BTEX and TPH-GRO.SS-3 was collected approximately 3 feet northwest of
the broken pipe at 4.5 feet bgs,while the concentrations of BTEX and TPH-GRO are still high,
they are significantly less than directly below the pipe.SS-4 was collected 3 feet to the southeast
and at 4.5 feet bgs and did not contain any petroleum constituents above ISLs.
To explain further,SS-2 contained 6.99 ppm benzene,SS-3 contained 0.42 ppm benzene and
SS-4 contained <0.11 ppm benzene.
This indicates that the gasoline likely traveled vertically through the soil and did not spread
laterally.6 additional samples from 3 soil boring locations confirm there was no lateral spread of
contamination.
Initial Abatement and Feasibility of Further Remediation
2290 lbs of soil was removed with hand tools as part of the initial abatement of the release.
Further excavation was not possible due to the presence of conduits and the risk of destabilizing
the dispenser.
Due to the contamination being located directly below dispenser 1/2,further remediation is not
economically feasible at this time.To access the residual contamination,the dispenser would
have to be removed.Furthermore,Maverik #314 is located on a very small lot,any remediation
activity would likely require the site to shut down for the time being or lose customers due to
issues entering /leaving the lot.
Since this site is to remain a gas station for many years,it does not make economic sense to
remove the small pocket of contamination at this time.
Exposure Pathways
Soil Leaching to Groundwater
This pathway is incomplete,a previous subsurface investigation conducted in 2009 determined
groundwater was not present until at least 70 feet bgs.Due to the relatively small quantity of the
release,less than 85 gallons,it is unlikely to travel deep enough to encounter groundwater.There
would be more lateral impacts from the release if it was large enough to penetrate over 70 feet of
soil further indicating that the release is localized in a small pocket under the dispenser.Lastly,
the majority of the source material has been removed.
Groundwater Ingestion
This pathway is incomplete.There are no water rights within 500 feet of the release.
Furthermore,drinking water is not sourced from aquifers in the area.
Vapor Intrusion to Indoor Air
This pathway is incomplete.The gas station building is located 33 feet away from the release.
The contamination is located in a small pocket at least 4.5 feet bgs and the soil sample collected
from B-2,which is located between the release and the building,did not contain any petroleum
constituents above ISLs.The contamination is overlain with asphalt which prevents
volatilization.
Vapor Intrusion to Outdoor Air
This pathway is incomplete.The contaminated soil is located at a depth of at least 4.5 feet bgs,
this means that petroleum vapors would likely attenuate through the clean soil before reaching
the surface.The contamination is also overlain with asphalt.
Dermal Contact
This pathway is partially complete.Currently,the contamination is inaccessible as it is located
underneath the dispenser.However,the site will be added to Blue Stakes of Utah to alert
construction personnel of the contamination.A Contamination map for the site will accompany
the NFA.
Recommendation for No Further Action:
This site meets the Corrective Action Cleanup Standards Policy for PST sites at Utah UST Rule
R311-211.Further cleanup of this site is not warranted as the remaining contamination is not
likely to adversely affect human health and the environment as discussed above.The residual
contamination will be mapped and added to Blue Stakes of Utah.
Notification of Subsurface Petroleum ContaminationMaverik #314 located at 795 South State Street, OremFacility 1000317 Release OIS
1.Through the Blue Stakes Utility notification system, the Utah Division of
Environmental Response and Remediation (DERR) received information that you
plan to excavate in the vicinity of the above referenced property.2.The map below shows the area of this property where petroleum contaminated
soil is known to exist, starting at 4.5 feet below the ground surface.3.If you plan to dig within or immediately adjacent to the area in the red, as seen
below, contact the DERR at [phone], and refer to this Notice.
Restricted Area
Facility Information
Facility Name:MAVERIK #314 Release ID:OIS
Facility Address:795 S STATE OREM, UT 84058 Facility ID:1000371
Notification Date:09/07/2023
Owner Name:MAVERIK, INC.Reporting Party:Mark Stewart
Owner Address:185 SOUTH STATE STREET, STE 800 SALT LAKE
CITY, UT 84111
Project Manager:Liberty Coe
Site Assessment Information
a. Contaminant Source Information Cause of Release (if known)
Product
Released
Amount
Released (gal)
Size (gal) # of
USTs Tank Piping Disp Over/Spill Other Comments
Gasoline 85 Yes
Diesel
Waste Oil
Unknown
Other
Tank Piping Disp Free Prod Cont Soil
Sources Removed:No Yes No No Yes
b. Land Use Information
Current Land use at the Site:Commercial Surrounding Neighborhood:Commercial
(Note: Surrounding land use is Residential if one or more residences share a common property line with the Facility)
c. Soil Information Soil Type(s)
Depth to Contaminated Soil
(feet below land surface):
2 GW-Well-graded gravel
Method of Soil Type Identification:Unified Soil Classification
d. Groundwater Information
Was groundwater encountered?:No Thickness of Free Product:
Depth to groundwater
(feet below land surface):
Is groundwater impacted at any
concentration:
No
Groundwater flow direction: Slope direction of surface topography:
e. Distance from Highest Measured Contaminated Concentrations and Sampling Location to Nearest Potential Receptor
Receptors:(Enter distance to each receptor from corresponding sampling location in feet)
Distance- Location Distance- Location
Water Line:30 - B1 Sewer Line:40 - B1 Building Desc:Commercial
Electrical:45 - B3 Natural Gas:45 - B3 Other Desc:underground
communication line
Building:30 - B2 Telephone:na -
Property Line 60 - B1 Storm Drain:na -
Other(specify):50 - B1
Receptors Within 500 feet:
Municipal Well:800 Domestic Well:na Irrigation Well:na
Other:na
Surface Water(specify type: lake, stream, creek, river, wetland):Dist: na Desc: na
Utah's RBCA Tier 1 Worksheet
Printed on: 8/1/2024 2:39:02 PM
Facility History - Executive Summary
RBCA Tier 1 Screening Level Evaluation
Groundwater(mg/L)Soil(mg/Kg)
Constituent ISL/Tier 1 Level Highest Concentration and
Sampling Location
ISL/Tier 1 Level Highest Concentration and
Sampling Location
Benzene 0.005/0.30 na 0.20/0.90 6.99 SS-2
Toluene 1.0/3.00 na 9.0/25.0 183 SS-2
Ethylbenzene 0.7/4.00 na 5.0/23.0 65.1 SS-2
Xylenes 10.0/10.0 na 142.0/142.0 406 SS-2
Napthalene 0.70/0.70 na 51.0/51.0 13 SS-2
MTBE 0.20/0.20 na 0.30/0.30 <0.11 SS-2
TPH-gasoline 1.0/10.0 na 150/1500 3070 SS-2
TPH-diesel 1.0/10.0 na 500/5000 1630 SS-3
Oil and Grease/TRPH 10.0/10.0 1000/10000
Recommended Tier 1 Actions
All contaminant concentration levels are below ISLs or below Tier 1 screening levels and no receptors are within the critical
distances. Recommendation - No further action.
Tier 1 criteria (contaminant concentration and/or distance to receptors) are exceeded at the site.
Recommendation - See supplemental information in Closure Packet.
Evaluation Completed by:Date:
DERR Project Manager's Signature
Utah's RBCA Tier 1 Worksheet
Printed on: 8/1/2024 2:39:02 PM
August 1, 2024
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
B-1 @ 15 ft B-2 @ 20 ft B-3 @ 5-6.5 ft B-3 @ 10-11.5 ft B-3 @ 15-16.5 ft B-3 @ 20-21.5 ft
12/22/2023 12/22/2023 5/29/2024 5/29/2024 5/29/2024 5/29/2024
Method Analyte Units Result Result Result Result Result Result
8260B TPH (GC/FID) LOW FRACTION mg/kg <0.229 <0.248 <0.250 <0.229 <0.245 <0.240 150 1,500
8260B BENZENE mg/kg <0.009 <0.01 <0.01 <0.009 <0.01 <0.01 0.2 0.9
8260B TOLUENE mg/kg <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 9 25
8260B ETHYLBENZENE mg/kg <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 6 23
8260B XYLENES, TOTAL mg/kg <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 142 142
8260B NAPHTHALENE mg/kg <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 51 51
8260B METHYL TERT-BUTYL ETHER (MTBE)mg/kg <0.009 <0.01 <0.01 <0.009 <0.01 <0.01 0.3 0.3
8015 TPH (GC/FID) HIGH FRACTION mg/kg <50 <50 74 397 116 <53 500 5,000
Notes Results in bold are above laboratory detection levels
Below laboratory detection levels
mg/kg = milligram/kilogram
Utah Initial
Screening Level
ISL)
Utah Tier 1
ScreeningLevelDateCollected
Client Sample ID
Table 1
Summary of Soil Analytical Results
Maverik #314
795 South State Street, Orem, UT
Facility ID 100037, Release ID OIS
Figure 1. Corroded flexible piping around pipe elbow.
OREM, UTAH
MAVERIK STORE #314
DATE PREPARED: 01-10-2024
FIGURE 2
TETRA TECH
4750 WEST 2100SOUTHSUITE400
SALT LAKE CITY, UTAH 84120
Site Map and Boring Locations
CC Po
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C
P
P
P
W
W
W
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G Meter
M
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t
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r
G
G
G
light pole
B-1
B-2
SS sanitary sewer - black
W water - blue
P power - red
G gas - yellow
C communications - orange
Soil Borings
Figure courtesy of Maverik, Inc
S
S
W
W
Maverik Orem Store #314
Soil Boring: B-3
Date Started: 05/29/2024 Date Completed: 05/29/2024 Location
Accuracy: Surveyed
Client Name: Maverik Checked By: David Wilson Drilling Firm: ConeTec
Hammer Type: Auto Logged By: C. Stripeika Method: Auger
Depth: 21.5'Rig Type: CME-55 Tooling: 3-1/4" Hollow Stem
Auger
Surface
Elevation: ~4780'Water Level At
Time Of Drilling: N/A Water Level After
Drilling: N/A
De
p
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h
f
t
5
10
15
20
El
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4780
4775
4770
4765
4760
Wa
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US
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GM
Gr
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4.6
6.1
1.1
0.3
Visual Classification and Remarks
0.5
5.0
10.0
15.0
20.0
Boring termination @ 21.5 feet
21.5
FILL
Very dense, tan, dry, SILTY GRAVEL (GM)
Sample @ 13:20
Sample @ 13:45
Sample @ 14:05
Sample @ 14:50
Maverik #314
Soil Bonig12 B
Date Started: 12/22/23 Date Completed: 12/22/23 Location
Accuracy:
Client Name: Maaverik, Inc.Checked By: David Wilson Driller: Curt Stripeika
Drilling Firm: Direct Push Services Hammer Type: Auto Hammer Weight: 150
Logged By: Curt Stripeika Method: Air Rotary Depth: 21'
Rig Type: Geoprobe 7822DT Tooling: Rotary Drill Surface
Elevation: 4780'
Water Level At
Time Of Drilling: N/A Water Level After
Drilling: N/A
De
p
t
h
f
t
5
10
15
20
El
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v
a
t
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f
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Wa
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US
C
S
GW
GM
Gr
a
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L
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PI
D
0
0
1.4
0
Visual Classification and Remarks
0.3
1.0
End of Boring
20.5
CONCRETE
FILL, WELLYGRADED GRAVEL ;GW<
Very dense, SILT= GRAVEL ;GM<
Sample collected BY1 15ft >12?10
Maverik #314
Soil Bonig12 B
Date Started: 12/22/23 Date Completed: 12/22/23 Location
Accuracy:
Client Name: Maaverik, Inc.Checked By: David Wilson Driller: Curt Stripeika
Drilling Firm: Direct Push Services Hammer Type: Auto Hammer Weight: 150
Logged By: Curt Stripeika Method: Air Rotary Rig Type: Geoprobe 7822DT
Tooling: Rotary Drill Surface
Elevation: N/A Water Level At
Time Of Drilling: N/A
Water Level After
Drilling: N/A
De
p
t
h
f
t
5
10
15
20
El
e
v
a
t
i
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f
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Wa
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US
C
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GW
GM
Gr
a
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L
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PI
D
0
0
0
0
Visual Classification and Remarks
0.3
1.5
End of Boring
20.5
CONCRETE
FILL, WELLYGRADED GRAVEL ;GW<
Very dense, SILT= GRAVEL ;GM<
Sample collected BY2 20ft >15?30
Water Rights Map
Point (1) Location:Address: 795 S STATE ST, OREM
0 100 200ft
N
S
W E
7/30/24, 12:16 PM Map
https://maps.waterrights.utah.gov/EsriMap/map.asp 1/1
Groundwater Protection Zone Map