DERR-2025-001918

Table of Contents
1.Internal Memorandum
2.RBCA Tier 1 Worksheet
3. Supplemental Information
4.Site Map(s)
5.Groundwater Contour Map
6.Soil Boring Log
7.Groundwater Analytical Results
8.Water Rights
9.Groundwater Protection Zones Map
10.Topographic Map
Closure Packet for No Further Action
Facility ID 4000381
Release ID OKG
located at 1950 West 3500 South,
West Valley City, Utah
MEMORANDUM
TO: LPST File
THROUGH: Morgan Atkinson, PST Branch Manager
Division of Environmental Response and Remediation
Mike Pecorelli, LPST/ Section Manager
Division of Environmental Response and Remediation
Scott Everett, Toxicologist
Division of Environmental Response and Remediation
FROM: Alex Thompson, LPST/ Project Manager
Division of Environmental Response and Remediation
DATE: February 18, 2025
SUBJECT: LPST NFA - Closure Review Memo
West Valley Sinclair, located at 1950 West 3500 South, Salt Lake City, Utah
Facility Identification No. 4000381, Release Site OKG
A petroleum release from a leaking dispenser was reported to the Division of Environmental Response
and Remediation (DERR) on March 28, 2024. The release was reported to the DERR based on an
observation made by a DERR representative on a routine compliance inspection. The extent and degree
of contamination has been fully defined and a No Further Action (NFA) review is hereby requested.
The NFA package with supporting documents can be found here:

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.
Facility Information
Facility Name:WEST VALLEY SINCLAIR Release ID:OKG
Facility Address:1950 W 3500 S WEST VALLEY CITY, UT 84119 Facility ID:4000381
Notification Date:03/28/2024
Owner Name:SHAROOZ BROTHERS, INC.Reporting Party:Kim Viehweg
Owner Address:1950 W 3500 S WEST VALLEY CITY, UT 84119 Project Manager:Alex Thompson
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 Unkn Yes
Diesel
Waste Oil
Unknown
Other
Tank Piping Disp Free Prod Cont Soil
Sources Removed:No No No No No
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):
Unkn SM-Silty sands 0-8'
CL-Inorganic clays 8-15'
MH-Inorganic silts 8-15'
Method of Soil Type Identification:
d. Groundwater Information
Was groundwater encountered?:Yes Thickness of Free Product:None
Depth to groundwater
(feet below land surface):
6.4-8.5 Is groundwater impacted at any
concentration:
Yes
Groundwater flow direction:S Inferred Slope direction of surface topography:S
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' - MW-8A Sewer Line:20' - MW-8A Building Desc:Commercial
Electrical:>30' - MW-8A Natural Gas:Unk - MW-8A Other Desc:Municipal Sewer Line
Building:>30' - MW-8A Telephone:>30' - MW-8A
Property Line 10' - MW-8A Storm Drain:>30' - MW-8A
Other(specify):20' - MW-8A
Receptors Within 500 feet:
Municipal Well:>500'Domestic Well:<10'Irrigation Well:>500'
Other:
Surface Water(specify type: lake, stream, creek, river, wetland):Dist: >500' Desc: None
Utah's RBCA Tier 1 Worksheet
Printed on: 2/18/2025 1:55:27 PM
Facility History - Executive Summary
See Supplemental Information.
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 0.023 MW-8A 0.20/0.90 NA NA
Toluene 1.0/3.00 <0.012 MW-8A 9.0/25.0 NA NA
Ethylbenzene 0.7/4.00 <0.012 MW-8A 5.0/23.0 NA NA
Xylenes 10.0/10.0 <0.038 MW-8A 142.0/142.0 NA NA
Napthalene 0.70/0.70 0.157 MW-8A 51.0/51.0 NA NA
MTBE 0.20/0.20 <0.008 MW-8A 0.30/0.30 NA NA
TPH-gasoline 1.0/10.0 0.872 MW-8A 150/1500 NA NA
TPH-diesel 1.0/10.0 1.1 MW-8A 500/5000 NA NA
Oil and Grease/TRPH 10.0/10.0 NA NA 1000/10000 NA NA
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 attached supplemental information worksheet.
Evaluation Completed by:Date:
DERR Project Manager's Signature
Utah's RBCA Tier 1 Worksheet
Printed on: 2/18/2025 1:55:27 PM
2-18-2025
1
SUPPLEMENTAL INFORMATION
February 18, 2025
West Valley Sinclair
1950 West 3500 South, West Valley City, Utah
Facility Identification No. 4000381, Release Site OKG

Release History and Current Property Use
The site is an active gas station in West Valley City, Utah. The fueling system consists of one
8,000-gallon and one 12,000-gallon underground storage tanks (USTs) that contain gasoline. There
are two dispensers at the site. During a DERR site inspection on March 27, 2023, gasoline was
observed dripping from a newly installed O-ring on the meter at dispenser 1 / 2. The new meter
had been installed less than one week prior to the inspection. The dispenser was shut down and
Petroleum Equipment Company replaced the O-ring. A site map is provided as Figure 1.

There is already an open release (NOU) at the site associated with a previous owner. The old
release is an ongoing investigation.

When new sampling was compared with historic sampling, elevated levels of some contaminants
were located down gradient of where the OKG release occurred. The spike in contamination levels
was used to delineate the new release from the old.

Nature and Extent of Contamination
The most recent sampling conducted for the former release indicated the presence of Benzene and
TPH-GRO above the respective Tier 1 Screening levels in MW-2A. No other Tier 1 exceedances
were noted in any of the other wells sampled.

During the initial round of groundwater sampling associated with OKG, ISL exceedances were
discovered in both wells for Benzene with a much higher concentration in MW-8A. MW-8A also
exceeded the ISL for TPH-GRO. No Tier 1 exceedances were observed.

During the subsequent sampling event, all concentrations had lowered but Benzene was still above
ISL. Benzene concentrations in MW-8A were fivefold lower than the initial sampling. Monitoring
well MW-9A was not sampled again due to the low initial concentrations.

Actions Taken to Eliminate or Control the Source of Contamination
No remedial action has been taken at the site.

Impact of Remaining Contamination on Public Health and the Environment

Groundwater Ingestion Exposure Pathway
This is the main concern for the closure of this release as there are multiple groundwater
wells located within the Tier 1 500-foot radius of the release. The contamination is quite
low in MW-8A so the risk is not great but the pathway must be considered since it is
complete.

There are also both a high-pressure municipal water line and a municipal sewer line located
2
offsite but within the 30-foot Tier 1 guidelines. After reading peer reviewed material there
is some evidence to suggest high pressure water lines are resistant to lower levels of
petroleum contamination influence. Both of these underground lines are of some concern
with respect to this and the former release.

Soil Leaching-to-Groundwater

Soil sampling at the site has not been conducted in quite some time. While this is an issue,
the responsible party for the former release will be responsible for soil and groundwater
confirmation sampling. At that time, the DERR will check to make sure no pathways are
complete with respect to soil leaching to the groundwater.

Vapor Intrusion-to-Indoor Air Exposure Pathway
There are no buildings overlaying the remaining contamination, therefore this pathway is
incomplete.

Surface Soil Exposure Pathway: Dermal Contact, Particulate Inhalation and Ingestion, and
Construction Worker
There are no petroleum contaminated soils exposed to the surface, therefore this pathway is
incomplete.

Economic Considerations and Cost-Effectiveness of Cleanup Options
With remaining contamination concentrations so low it is not cost effective to try and remove or
remediate the contamination. If contamination is discovered in another part of the site during the
remaining investigation for the NOU release, it will be the responsibility of that responsible party
to deal with said contamination. This release was evaluated based on the direction historic
contamination traveled. Remediating what contamination is left would be a large economic strain
on the current property owner.

Technology Available for Cleanup
In-situ remediation could be considered to clean up the remaining contamination, but this method
is not cost effective. It should be mentioned that natural processes will likely breakdown whatever
contamination related to the OKG release is located at the site in the future.

Figure 1
NORTH
Approx. scale in feet
00 20
West Valley Sinclair
1950 W 3500 South
West Valley City, Utah
MSiteap
Monitoring Well
MW-9A
rWate
wSeer
Elecrcti
mComunication
Sr aintomDr
D-2D-3D-4D-5
D-1
USC-2
TB-SE
USC-1 Dispenser 1 / 2
MW-4A
MW-5A
MW-8A
PROJECT: WEST VALLEY SINCLAIR ATC
ilvno[IIAI . GIutmftrt
TIDG SCIIII . I^IIETS IIsIrr!
PROJECT NUMBER: 271EMOO379
LOGGED BY: RBA START DATE: 1-31-18
CHECKED BY: JJC COMPLEIION DATE: 1-31-18
GROUND SURFACE ELEV. DATUM (FT-MSL): N/A DRILLING COMPANY: DIRECT PUSH SERVICES (DPS)
DRILLING EQUIPMENT: GEOPROBE 7720
BORTNG DEPTH (FT):15' lWeU- Orern (FT): 1s i/ATER DEPTH (FT)- lnitiol: 7' Completion: N/A
WELL MATERIALS: 2" 0.010' PREPACK SCREEN, SCHED. 40 PVC UELL SCREEN INTERVAL (FT): s-1s'
WELL CASING ELEVATION: N/A )VM/oVA: MINIME 2000
BACKFILL MATERIAL: BENTONITE CHIPS, 10/20 SILICA SAND, CONCREI-E
l^Lf,
ItF-lo_lur o
0
5
I
10
15
BORIN
LITHOLOGY SAMPLE
o_
o-
o
o
rLZLlOtr)od
Era'g
a
U)IO
toJoO
COMMENTS
7. FLUSH MOUNT
DESCRIPTION
O-7'CONCRETE
hJ
o_
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o
mI
E.td]xOul
E.
ROAD BASE; S llD. cR VEL RLL
nxE-cnerxrosex-o,weu-emomlffi nffi ioNofr F$-rsr
nnr c-nnHm srlro, vreu- caroEo. y-d6--
}IYDROCIRBON ODOR
wEr o 7'
-snwcuv,ymruilTresn-crnr,wEr-Mosr
SILTY CLAY, HIGH PI.ASIICTY, MOIST, NO OOOR
- 4-6'
-o09:00
- 6-E-o
-09:.l0
_11615
--O9:20
502
90t
t00z
67.2
5/t6
2'.122
1 898
576
2.1
o.2
o.2
FILL
s$/
CL
CH
DAI
GF
LIG
GR,
TI
IK
AY
HT
\Y
,N
\grluuNut(t lt
zBENTONITEP' CHIPS
,/srucA SAND
-2, SCHED.y' 40 RtsER
PREPACK
o.o1o" sLoT
-zSCREEN,(
TD o 15'
DESIG NATION: MW- BA BORING LOG PAGE NUMBER10F1 MW_BA
i
I
I
i
I
I
I
t
I
I
I
I
I
Monitoring
Well
Date
Collected
Total
Depth
(ft)
Depth to
Water
(ft)
Gallons
purged
MTBE
(mg/L)
Benzene
(mg/L)
Toluene
(mg/L)
Ethyl-
benzene
(mg/L)
Total
Xylenes
(mg/L)
Naph-
thalene
(mg/L)
TPH-
GRO
(mg/L)
TPH-
DRO
(mg/L)
0.2 0.005 1 0.7 10 0.7 1 1
0.2 0.3 3 4 10 0.7 10 10
MW-4A 8/23/2024 NM NM 1.75* <0.008 <0.005 <0.012 <0.012 <0.038 <0.012 <0.125 NA
MW-5A 8/23/2024 NM NM 1.75* <0.008 <0.005 <0.012 <0.012 <0.038 <0.012 <0.125 NA
MW-8A 8/23/2024 15 NM 1.75* <0.008 0.105 0.012 0.11 0.134 0.662 2.04 NA
MW-8A 12/16/2024 15 7.63 1.75* <0.008 0.023 <0.012 <0.012 <0.038 0.157 0.872 1.1
MW-9A 8/23/2024 NM NM 1.75* <0.008 0.008 <0.012 <0.012 <0.038 0.034 <0.125 NA
* = well purged dry
TPH-GRO = Total petroleum hydrocarbons-gasoline range organics
mg/L = milligrams per liter, which approximates parts per million
ISL = Initial Screening Level
Subsurface Investigation
Groundwater Analytical Results
West Valley Sinclair, 1950 W 3500 South, West Valley City, UT (Fac ID #4000381)
Table 1
ISL's
RBCA Tier 1 Screening
Figure 1
NORTH
Approx. scale in feet
00 20
West Valley Sinclair
1950 W 3500 South
West Valley City, Utah
MSiteap
Monitoring Well
MW-9A
Wa ert
Swere
rNatual Gas
Communication
Storm Drain
D-2D-3D-4D-5
D-1
USC-2
TB-SE
USC-1
MW-4A
MW-5A
MW-8A
Water Right Details for 59-2015
Utah Division of Water Rights 2/18/2025 12:26 PM
(WARNING: Water Rights makes NO claims as to the accuracy of this data.)
Water Right: 59-2015 Application/Claim: U3362 Certificate:
Owners:
Name: George Anast
Address: 1755 West 3500 South
Salt Lake City UT 84119
Interest:
Remarks:
General:
Type of Right: Underground Water Claim Source of Info.: Proposed Determination Status: Disallowed
Quantity of Water: 0.015 CFS
Source: Underground Water Well
County: Salt Lake
Common Description:
Proposed Det. Book: 59-5 Map:Pub. Date: 11/00/1979
Land Owned by Appl.:County Tax Id#: .
Dates:
Filing:
Filed: 02/13/1936
Priority: 05/04/1933 Decree/Class:
Advertising:
Publication Began:Publication End:Newspaper:
Protest End Date:Protested: Not Protested Hearing Held:
Approval:
State Eng. Action:Action Date:
Recon. Req. Date:Recon. Req Type:
Certification:
Proof Due Date:Extension Filed Date:
Election or Proof:Election/Proof Date:
Cert./WUC Date:Lapsed, Etc. Date:Lap. Ltr. Date:
Wells:
Prov. Well Date:Most Recent Well Renovate/Replace Date:
Points of Diversion:
Points of Diversion - Underground:
(1) N 52 ft. E 1298 ft. from SW corner, Sec 27 T 1S R 1W SLBM
Well Diameter: 2 in.Depth: 102 to ft.Year Drilled: 1951 Well Log: Yes Well Id#:
Elevation:UTM: 420263.401, 4505532.646 (NAD83)
Source/Cmnt:
Use Totals:
Water Right Details for 59-2015 2/18/2025 12:26 PM
Utah Division of Water Rights Page 1 of 1
Water Right Details for 59-2313
Utah Division of Water Rights 2/18/2025 12:29 PM
(WARNING: Water Rights makes NO claims as to the accuracy of this data.)
Water Right: 59-2313 Application/Claim: U6785 Certificate:
Owners:
Name: Fiesta Foods Incorporated
Address: 2010 West 3500 South
Salt Lake City UT 84119
Interest:
Remarks:
General:
Type of Right: Underground Water Claim Source of Info.: Proposed Determination Status: Disallowed
Quantity of Water: 0.056 CFS
Source: Underground Water Well
County: Salt Lake
Common Description:
Proposed Det. Book: 59-5 Map:Pub. Date: 11/00/1979
Land Owned by Appl.:County Tax Id#: .
Dates:
Filing:
Filed: 03/12/1936
Priority: / /1897 Decree/Class:
Advertising:
Publication Began:Publication End:Newspaper:
Protest End Date:Protested: Not Protested Hearing Held:
Approval:
State Eng. Action:Action Date:
Recon. Req. Date:Recon. Req Type:
Certification:
Proof Due Date:Extension Filed Date:
Election or Proof:Election/Proof Date:
Cert./WUC Date: 03/08/1972 Lapsed, Etc. Date: 03/08/1972 Lap. Ltr. Date:
Wells:
Prov. Well Date:Most Recent Well Renovate/Replace Date:
Points of Diversion:
Points of Diversion - Underground:
(1) N 67 ft. W 1694 ft. from S4 corner, Sec 27 T 1S R 1W SLBM
Well Diameter: 24 in.Depth: 260 to ft.Year Drilled: 1897 Well Log: No Well Id#:
Elevation:UTM: 420159.018, 4505530.506 (NAD83)
Source/Cmnt:
Use Totals:
Water Right Details for 59-2313 2/18/2025 12:29 PM
Utah Division of Water Rights Page 1 of 1
Water Right Details for 59-3086
Utah Division of Water Rights 2/18/2025 12:30 PM
(WARNING: Water Rights makes NO claims as to the accuracy of this data.)
Water Right: 59-3086 Application/Claim: U19153 Certificate:
Owners:
Name: George Anast
Address: 3955 South 3600 West
Salt Lake City UT 84119
Interest:
Remarks:
General:
Type of Right: Underground Water Claim Source of Info.: Proposed Determination Status: Disallowed
Quantity of Water: 0.045 CFS
Source: Underground Water Well
County: Salt Lake
Common Description:
Proposed Det. Book: 59-5 Map: 72a Pub. Date: 11/00/1979
Land Owned by Appl.:County Tax Id#: .
Dates:
Filing:
Filed: 03/22/1940
Priority: / /1910 Decree/Class:
Advertising:
Publication Began:Publication End:Newspaper:
Protest End Date:Protested: Not Protested Hearing Held:
Approval:
State Eng. Action:Action Date:
Recon. Req. Date:Recon. Req Type:
Certification:
Proof Due Date:Extension Filed Date:
Election or Proof:Election/Proof Date:
Cert./WUC Date: 10/14/1976 Lapsed, Etc. Date: 10/14/1976 Lap. Ltr. Date:
Wells:
Prov. Well Date:Most Recent Well Renovate/Replace Date:
Points of Diversion:
Points of Diversion - Underground:
(1) S 135 ft. W 1488 ft. from N4 corner, Sec 34 T 1S R 1W SLBM
Well Diameter: 3 in.Depth: 364 to ft.Year Drilled: 1945 Well Log: Yes Well Id#:
Elevation:UTM: 420221.807, 4505468.936 (NAD83)
Source/Cmnt:
Use Totals:
Water Right Details for 59-3086 2/18/2025 12:30 PM
Utah Division of Water Rights Page 1 of 1
Water Right Details for 59-3087
Utah Division of Water Rights 2/18/2025 12:30 PM
(WARNING: Water Rights makes NO claims as to the accuracy of this data.)
Water Right: 59-3087 Application/Claim: U19154 Certificate:
Owners:
Name: George Anast
Address: 3955 South 3600 West
Salt Lake City UT 84119
Interest:
Remarks:
General:
Type of Right: Underground Water Claim Source of Info.: Proposed Determination Status: Disallowed
Quantity of Water: 0.033 CFS
Source: Underground Water Well
County: Salt Lake
Common Description:
Proposed Det. Book: 59-5 Map: 72a Pub. Date: 11/00/1979
Land Owned by Appl.:County Tax Id#: .
Dates:
Filing:
Filed: 03/22/1940
Priority: / /1910 Decree/Class:
Advertising:
Publication Began:Publication End:Newspaper:
Protest End Date:Protested: Not Protested Hearing Held:
Approval:
State Eng. Action:Action Date:
Recon. Req. Date:Recon. Req Type:
Certification:
Proof Due Date:Extension Filed Date:
Election or Proof:Election/Proof Date:
Cert./WUC Date: 11/10/1976 Lapsed, Etc. Date: 11/10/1976 Lap. Ltr. Date:
Wells:
Prov. Well Date:Most Recent Well Renovate/Replace Date:
Points of Diversion:
Points of Diversion - Underground:
(1) S 153 ft. W 1181 ft. from N4 corner, Sec 34 T 1S R 1W SLBM
Well Diameter: 2 in.Depth: to ft.Year Drilled: 1910 Well Log: No Well Id#:
Elevation:UTM: 420315.38, 4505463.45 (NAD83)
Source/Cmnt:
Use Totals:
Water Right Details for 59-3087 2/18/2025 12:30 PM
Utah Division of Water Rights Page 1 of 1
Water Right Details for 59-2572
Utah Division of Water Rights 2/18/2025 12:30 PM
(WARNING: Water Rights makes NO claims as to the accuracy of this data.)
Water Right: 59-2572 Application/Claim: U9348 Certificate:
Owners:
Name: George and Loraine Anast
Address: 3955 South 3600 West
Salt Lake City UT 84119
Interest:
Remarks:
General:
Type of Right: Underground Water Claim Source of Info.: Proposed Determination Status: Disallowed
Quantity of Water: 0.11 CFS
Source: Underground Water Well
County: Salt Lake
Common Description:
Proposed Det. Book: 59-5 Map: 72a Pub. Date: 11/00/1979
Land Owned by Appl.:County Tax Id#: .
Dates:
Filing:
Filed: 03/23/1936
Priority: / /1931 Decree/Class:
Advertising:
Publication Began:Publication End:Newspaper:
Protest End Date:Protested: Not Protested Hearing Held:
Approval:
State Eng. Action:Action Date:
Recon. Req. Date:Recon. Req Type:
Certification:
Proof Due Date:Extension Filed Date:
Election or Proof:Election/Proof Date:
Cert./WUC Date: 10/14/1976 Lapsed, Etc. Date: 10/14/1976 Lap. Ltr. Date:
Wells:
Prov. Well Date:Most Recent Well Renovate/Replace Date:
Points of Diversion:
Points of Diversion - Underground:
(1) S 114 ft. W 1694 ft. from N4 corner, Sec 34 T 1S R 1W SLBM
Well Diameter: 2 in.Depth: 252 to ft.Year Drilled: 1931 Well Log: No Well Id#:
Elevation:UTM: 420159.018, 4505475.337 (NAD83)
Source/Cmnt:
Use Totals:
Water Right Details for 59-2572 2/18/2025 12:30 PM
Utah Division of Water Rights Page 1 of 1
2
2
3
3
4
4
34
Ground Water Protection Zones
0 0.15 0.30.07 mi
0 0.3 0.60.15 km
:OKG Location
: OKG Location