DERR-2025-000187

Table of Contents
1.Internal Memorandum
2.RBCA Tier 1 Worksheet
3.Site Maps
4.Soil Boring Log
5.Soil Analytical Results
6.Groundwater Analytical Results
7.Water Rights Map
8.Groundwater Protection Zones Map
9.Topographic Map
Closure Packet for No Further Action
Facility ID 4001265
Release ID NPJ
located at 4901 West 2100 South,
Salt Lake 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: September 19, 2024
SUBJECT: LPST NFA - Closure Review Memo
Wheeler Machinery Company, located at 4901 West 2100 South, Salt Lake City, Utah
Facility Identification No. 4001265, Release Site NPJ
Four Underground Storage Tanks (USTs) were removed from the Wheeler Machinery property October
3, 2017. Closure sampling showed one groundwater sample with above Tier-1 levels of TPH-DRO (15.7
mg/L). On June 12, 2024, four new monitoring wells were installed as close to the original sample sites
as possible. Soil and groundwater sampling were conducted. Soil sampling results were under Initial
-1 exceedances. Over-excavation of the remaining soil
contamination is possible but is not considered to be economically feasible considering the remaining
contaminant levels and the land use will remain industrial for the foreseeable future. At this point the
DERR is recommending the site for no further action.
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:H & E EQUIPMENT COMPANY Release ID:NPJ
Facility Address:4899 W 2100 S SALT LAKE CITY, UT 84120 Facility ID:4001265
Notification Date:10/17/2017
Owner Name:WHEELER MACHINERY COMPANY Reporting Party:Aaron Spackman
Owner Address:4901 W 2100 S SALT LAKE CITY, UT 84120 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
Diesel 4-12K
Waste Oil
Unknown
Other
Tank Piping Disp Free Prod Cont Soil
Sources Removed:Yes Yes Yes No No
b. Land Use Information
Current Land use at the Site:Industrial Surrounding Neighborhood:Industrial
(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):
6 GC-Clayey gravel This was the first
matrix
encountered
when drilling.
SM-Silty sands Small section of
SM, damp,
around 5.5'.
CL-Inorganic clays Under the SM,
Moist.
Method of Soil Type Identification:Unified Soil Classification
d. Groundwater Information
Was groundwater encountered?:Yes Thickness of Free Product:None
Depth to groundwater
(feet below land surface):
6 Is groundwater impacted at any
concentration:
Yes
Groundwater flow direction:N Inferred Slope direction of surface topography:N
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-2 Sewer Line:>30 - MW-2 Building Desc:Industrial
Electrical:OH - MW-2 Natural Gas:>30 - MW-2 Other Desc:Heavy Equipment
Rental
Building:>30 - MW-2 Telephone:OH - MW-2
Property Line >30 - MW-2 Storm Drain:>30 - MW-2
Other(specify):>30 - Ukn utility -
MW-2
Receptors Within 500 feet:
Municipal Well:>500 Domestic Well:>500 Irrigation Well:>500
Utah's RBCA Tier 1 Worksheet
Printed on: 11/12/2024 11:55:42 AM
Other:
Surface Water(specify type: lake, stream, creek, river, wetland):Dist: >500 Desc: Retention Pond
Facility History - Executive Summary
Four Fiberglass Reinforced Plastic USTs were installed at the Site in 1980, approximately 75 feet north of the current location of the
Wheeler Cat Rental Store. Each UST had a capacity of 12,000 gallons and stored diesel. The tanks last operated on December 21,
2016, and were closed on October 3, 2017. During closure, the tanks were removed of fuel and sludge, and cleaned.
Three soil samples and two groundwater samples were collected from the excavation during UST removal activities on October 3,
2017 (Figure 3). One groundwater sample (identified as TH-3 in the Closure Notice) that was collected from the southeast corner of
the UST excavation had a total petroleum hydrocarbons diesel range organics (TPH-DRO) analytical result (15.7 milligrams per liter
[mg/L) over the ISL and Tier-1 level. The other analytes (benzene, toluene, ethylbenzene, xylenes, naphthalene [BTEXN], and TPH
gasoline range organics were under ISLs. The rest of the samples tested below ISLs as well.
On June 12, 2024 four new groundwater monitoring wells (MW-1 through MW-4) were installed within 10 ft of the locations proposed
in the Work Plan, with the exception of MW-3 which was moved about 30 feet northeast to avoid subsurface utilities and fill material
from the previous excavation (Figure 3). These four wells were installed to delineate the northern, eastern, and western extent of
groundwater impacts detected in TH-3 in 2017.
One groundwater sample (MW-2 GW) collected from the northeast corner of the Site had a TPH-DRO concentration of 1.34 mg/L
which slightly exceeded the ISL of 1 mg/L, but was less than the Tier 1 Screening Level of 10 mg/L. BTEXN and MTBE concentrations
did not exceed ISLs or Tier 1 Screening Level in this sample. No ISL or Tier 1 Screening Level exceedances were identified in any of
the other samples. MW-2 is not located within 30 feet of buildings, property boundaries, and utility lines. It is also located over 500 ft
away from water wells and significant surface water bodies.
It should be noted in the site map provided by GeoSyntec there is an unknown utility near MW-1. In the map and imagery, it looks to
be over the Tier-1 30¶requirement but at first glance it looks close.
From the time of the closure till now, the limited volume of the plume appears to be stable or decreasing in nature. This is an industrial
site and will stay that way for the foreseeable future. According to the Tier-1 standard environmental health has been evaluated and
this release no longer poses threat. While there was still TPH-DRO contamination above ISLs and remediation activities could be
employed to remediate what is left, it is neither economically nor technologically feasible to take such action considering the small
amount left will continue to degrade as we have already seen it do since the time of the previous sampling. At this time this site is
being recommended for closure.
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 0.00013 MW-2 GW 0.20/0.90 <0.00159 MW-2 SS
Toluene 1.0/3.00 <0.00100 MW-2 GW 9.0/25.0 0.00257 MW-1 SS
Ethylbenzene 0.7/4.00 <0.00100 MW-2 GW 5.0/23.0 0.0017 MW-1 SS
Xylenes 10.0/10.0 <0.00300 MW-2 GW 142.0/142.0 0.00121 MW-1 SS
Napthalene 0.70/0.70 <0.00500 MW-2 GW 51.0/51.0 <0.0199 MW-2 SS
MTBE 0.20/0.20 <0.00100 MW-2 GW 0.30/0.30 <0.00159 MW-2 SS
TPH-gasoline 1.0/10.0 NA NA 150/1500 NA NA
TPH-diesel 1.0/10.0 1.34 MW-2 GW 500/5000 12.8 MW-1 SS
Oil and Grease/TRPH 10.0/10.0 1000/10000 NA
Utah's RBCA Tier 1 Worksheet
Printed on: 11/12/2024 11:55:42 AM
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: 11/12/2024 11:55:42 AM
11/12/2024
Wheeler M ach inery L ocatio n
Salt Lake City
4 mi
N
➤➤
N
Image © 2024 A irbus
Image © 2024 A ir bus
Image © 2024 A ir bus
Wheeler M ach inery L ocatio n
Salt Lake City
2000 ft
N
➤➤
N
Image Lands at / Coper nic us
Image Lands at / Copernic us
Image Lands at / Copernic us
F ormer UST Area
W heeler Mac hinery Property
South-Eas t Area
500 ft
N
➤➤
N
Image Lands at / Coper nic us
Image Lands at / Copernic us
Image Lands at / Copernic us
Figure 5: Groundwater Sample Analytical Results
West Valley City, Utah 84120
4901 West 2100 South
Source: Salt Lake County, Aerial Date: 2023-05-24 Legal Description: Parcel 14-24-227-010-0000
MW-1
MW-2
MW-3
TH-2 TH-1
TH-3
June 2024 Geosyntec boring locations
2017 Sampling locations from UST
closure
Inferred groundwater flow
direction (north) based on
previous investigations
TH-4
MW-4
Notes:
ft bgs: feet below ground surface
mg/l: milligrams per liter
TPH-DRO: total petroleum hydrocarbons-diesel
range organics
LUST excavation boundary
(0'-0.5') ASPHALT
(0.5'-2') FILL
(GC) (2'-5') CLAYEY GRAVEL: moist, clayey gravel with sand
and subrounded cobbles < 8 inches.
(5'-7') Same as above; wet, organics.
(SM) (7'-9') SILTY SAND: grey, wet, fine.
(CL-ML) (9'-15') SILTY CLAY: grey, moist, orange oxidation.
Bottom of borehole at 15.0 feet.
0.5
2.0
7.0
9.0
15.0
4249.6
4248.1
4243.1
4241.1
4235.1
Cement seal (0.5'-2'
bgs)
Bentonite seal (2'-4'
bgs)
Sand pack (4'-15'
bgs)
Well screen: 2" Sch
40 PVC. Slot size:
0.010" (4.5'-14.5')
NOTES 0-5 ft bgs cleared using hydrovac
GROUND ELEVATION 4250.1 ft
LOGGED BY Annie Brown
DRILLING METHOD Hollow stem auger , direct push
HOLE SIZE 7.25"
DRILLING CONTRACTOR Pacific West GROUND WATER LEVELS:
CHECKED BY Lonnie Mercer
DATE STARTED 6/17/24 COMPLETED 6/18/24
AT TIME OF DRILLING 6.00 ft bgs / Elev 4244.10 ft
MATERIAL DESCRIPTION WELL DIAGRAM
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Casing Top Elev: 4250.096 (ft) Casing Type: 2" Sch 40 PVCFlush mount protective well casingSA
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PAGE 1 OF 1
BORING NUMBER MW-1
PROJECT NAME Site Investigation Report
PROJECT LOCATION 4901 W 2100 S
CLIENT Wheeler Machinery
PROJECT NUMBER SLC1090
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Geosyntec Consultants
215 S State Street Suite 500
Salt Lake City, Utah 84111
Telephone: [phone]
WELL LATITUDE
WELL LONGITUDE
5'
MW-1
SS
10'
MW-1
GW
No
0.3
No
No
40.72257
-112.00695
Slight
0.2
0.2
(0'-0.5') ASPHALT
(GP) (0.5'-2') FILL
(GC) (2'-5') CLAYEY GRAVEL: brown, moist, clay to cobbles.
(ML) (5'-6) SILT: brown, wet.
(SM) (6'-8') SILTY SAND: grey-brown, wet, fine grained,
micaceous.
(CL-ML) (8'-15') SILTY CLAY: grey-brown, very moist to
moist, oxidized.
(13'-15') Same as above; brown, wet, organics.
Bottom of borehole at 15.0 feet.
0.5
2.0
5.0
6.0
8.0
15.0
4249.1
4247.6
4244.6
4243.6
4241.6
4234.6
Cement seal (0.5'-2'
bgs)
Bentonite seal (2'-4'
bgs)
Sand pack (4'-15'
bgs)
Well screen: 2" Sch
40 PVC. Slot size:
0.01" (4.5'-15' bgs)
NOTES 0-5 ft bgs cleared using hydrovac
GROUND ELEVATION 4249.57 ft
LOGGED BY Annie Brown
DRILLING METHOD Hollow stem auger , direct push
HOLE SIZE 7.25"
DRILLING CONTRACTOR Pacific West GROUND WATER LEVELS:
CHECKED BY Lonnie Mercer
DATE STARTED 6/17/24 COMPLETED 6/18/24
MATERIAL DESCRIPTION WELL DIAGRAM
GR
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Casing Top Elev: 4249.566 (ft)
Casing Type: 2" Sch 40 PVCFlush mount protective well casingSA
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PAGE 1 OF 1
BORING NUMBER MW-2
PROJECT NAME Site Investigation Report
PROJECT LOCATION 4901 W 2100 S
CLIENT Wheeler Machinery
PROJECT NUMBER SLC1090
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Geosyntec Consultants
215 S State Street Suite 500
Salt Lake City, Utah 84111
Telephone: [phone]
AT TIME OF DRILLING 6.00 ft bgs / Elev 4243.57 ft
WELL LATITUDE 40.72259
WELL LONGITUDE -112.00667
10'
MW-2
GW
5'
MW-2
SS
No
No
0.2
0.3
0.3
(0'-0.5') ASPHALT
(0.5'-3') FILL
(GC) (3'-5.5') CLAYEY GRAVEL: brown, moist, clay to
cobbles
(SM) (5.5'-7') SILTY SAND: grey, wet, micaceous.
(CL-ML) (7'-15') SILTY CLAY: brown, wet.
Bottom of borehole at 15.0 feet.
0.5
3.0
5.5
7.0
15.0
4249.7
4247.2
4244.7
4243.2
4235.2
Cement seal (0.5'-2'
bgs)
Bentonite seal (2'-4'
bgs)
Sand pack (4'-15'
bgs)
Well screen: 2" Sch
40 PVC. Slot size:
0.01" (4.5'-15' bgs)
NOTES 0-5 ft bgs cleared using hydrovac
GROUND ELEVATION 4250.15 ft
LOGGED BY Annie Brown
DRILLING METHOD Hollow stem auger , direct push
HOLE SIZE 7.25"
DRILLING CONTRACTOR Pacific West GROUND WATER LEVELS:
CHECKED BY Lonnie Mercer
DATE STARTED 6/17/24 COMPLETED 6/18/24
AT TIME OF DRILLING 5.50 ft bgs/ Elev 4244.65 ft
MATERIAL DESCRIPTION WELL DIAGRAM
GR
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Casing Top Elev: 4250.152 (ft)
Casing Type: 2" Sch 40 PVCFlush mount protective well casingSA
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BORING NUMBER MW-3
PROJECT NAME Site Investigation Report
PROJECT LOCATION 4901 W 2100 S
CLIENT Wheeler Machinery
PROJECT NUMBER SLC1090
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Geosyntec Consultants
215 S State Street Suite 500
Salt Lake City, Utah 84111
Telephone: [phone]
WELL LATITUDE 40.72233
WELL LONGITUDE -112.00662
5'
MW-3
SS
10'
MW-3
GW
No
0.2
No 0.1
0.2
(0'-0.5') ASPHALT
(0.5'-3.5') FILL
(GC) (3.5'-5.5') CLAYEY GRAVEL: brown, moist.
(ML)(5.5'-9') SILT: brown, moist, organics.
(6.5) Same as above; wet.
(7.5'-8') Hard pan
(CL) CLAY: grey, moist, oxidation.
Bottom of borehole at 15.0 feet.
0.5
3.5
5.5
9.0
15.0
4249.9
4246.9
4244.9
4241.4
4235.4
Cement seal (0.5'-2'
bgs)
Bentonite seal (2'-4'
bgs)
Sand pack (4'-15'
bgs)
Well screen: 2" Sch
40 PVC. Slot size:
0.01" (4.5'-15' bgs)
NOTES 0-5 ft bgs cleared using hydrovac
GROUND ELEVATION 4250.41 ft
LOGGED BY Annie Brown
DRILLING METHOD Hollow stem auger , direct push
HOLE SIZE 7.25"
DRILLING CONTRACTOR Pacific West GROUND WATER LEVELS:
CHECKED BY Lonnie Mercer
DATE STARTED 6/17/24 COMPLETED 6/18/24
AT TIME OF DRILLING 6.50 ft bgs/ Elev 4243.91 ft
MATERIAL DESCRIPTION WELL DIAGRAM
GR
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Casing Top Elev: 4250.411 (ft)
Casing Type: 2" Sch 40 PVCFlush mount protective well casingSA
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BORING NUMBER MW-4
PROJECT NAME Site Investigation Report
PROJECT LOCATION 4901 W 2100 S
CLIENT Wheeler Machinery
PROJECT NUMBER SLC1090
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Geosyntec Consultants
215 S State Street Suite 500
Salt Lake City, Utah 84111
Telephone: [phone]
WELL LATITUDE 40.72234
WELL LONGITUDE -112.00699
10'
MW-3
GW
6'
MW-4
SS
No
No
0.1
0.1
Table 2: Well Construction Data Table
Wheeler Machinery Site Investigation Report 2024
Well ID Date Installed
Casing
Diameter
(in)
TOC Elevation
(Ground
Surface) (ft
amsl)
Slot Size
(in)
Screened Interval
(ft bgs)
Measured Well
Depth (ft bgs)
Depth to Water
(ft bgs)
Water
Table
Elevation
(ft amsl)
Latitude Longitude
MW-1 6/18/2024 2.25 4,250.10 0.01 5-15 15 6.15 4243.946 40.72257 -112.00695
MW-2 6/18/2024 2.25 4,249.57 0.01 5-15 15 5.58 4243.986 40.72259 -112.00667
MW-3 6/18/2024 2.25 4,250.15 0.01 5-15 15 6.20 4243.952 40.72233 -112.00662
MW-4 6/18/2024 2.25 4,250.41 0.01 5-15 15 6.51 4243.901 40.72234 -112.00699
Notes:
TOC = Top Of Casing
MW = Monitoring Well
in = inches
ft = feet
amsl = above mean sea level
bgs = below ground surface
Table 3: Soil Analytical Data Table
Wheeler Machinery Site Investigation Report 2024
Benzene Toluene Ethylbenzene Total Xylenes Naphthalene MTBE TPH-DRO
(8015)
MW-1 SS 6/18/24 5-6 <0.00137 0.00257 J 0.0017 J 0.00121 J <0.0172 <0.00137 12.8
MW-2 SS 6/18/24 5-6 <0.00159 0.00241 J <0.00398 <0.0104 <0.0199 <0.00159 3.89 J
MW-3 SS 6/18/24 5-5.5 <0.00143 0.00202 J <0.00359 <0.00932 <0.0179 <0.00143 6.59 J
MW-4 SS 6/18/24 6-6.5 <0.00142 0.00188 J <0.00355 <0.00924 <0.0178 <0.00142 2.93 J
0.2 9 5 142 51 0.3 500
0.9 25 23 142 51 0.3 5000
Notes:
ft = feet
bgs = below ground surface
mg/kg = milligram/kilogram
J = estimated; analyte detected between Method Detection Limit and Practical Quantitation Limit
Detected concentrations in bold exceed their respective NDEP Reportable Concentration.
Initial Screening Levels
Tier 1 Screening Levels
Soil Analytical Data Table (mg/kg)
Sample ID Sample
Date
Collection Depth
(ft bgs)
Analytical Method (8260B)
Table 4: Groundwater Analytical and Elevation Data Table
Wheeler Machinery Site Investigation Report 2024
Benzene Toluene Ethylbenzene Total Xylenes Naphthalene MTBE TPH-DRO
(3511/8015)
MW-1 GW 6/25/24 <0.00100 <0.00100 <0.00100 <0.00300 <0.00500 <0.00100 0.796 6.15 4,243.95
MW-2 GW 6/25/24 0.00013 J <0.00100 <0.00100 <0.00300 <0.00500 <0.00100 1.34 5.58 4,243.99
MW-3 GW 6/25/24 <0.00100 <0.00100 <0.00100 <0.00300 <0.00500 <0.00100 0.301 6.2 4,243.95
MW-4 GW 6/25/24 <0.00100 <0.00100 <0.00100 <0.00300 <0.00500 <0.00100 0.348 6.51 4,243.90
0.005 1 0.7 10 0.7 0.2 1
0.3 3 4 10 0.7 0.2 10
Notes:
ft = feet
bgs = below ground surface
mg/l = milligram/liter
J = estimated; analyte detected between Method Detection Limit and Practical Quantitation Limit
Detected concentrations in bold exceed their respective NDEP Reportable Concentration.
Groundwater Analytical Data Table (mg/l)
Depth to Water
(ft bgs)
Water Table
Elevation (ft)
Tier 1 Screening Levels
Sample ID Sample
Date
Analytical Method (8260B)
Initial Screening Levels
59-5901
59-5901
59-5901
59-1625
59-1663
59-1816
:ater Rights - Points of Diversion
UGRC
Utah Points of Diversion
59-1663: Wheeler Cat Underground Water Well
59-1625: Privately Owned Underground Water Well
0 0.15 0.30.07 mi
0 0.2 0.40.1 km
1:11,426
4
Groundwater Protection Zone
UGRC
Utah DDW Groundwater Source Protection Zones
9/19/2024
0 1 20.5 mi
0 1.5 30.75 km
1:91,408
IIUSGS ,c;,,.,,.for•CMngNr!Jworlrl
U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY
Ken11ecoirTailing,P-01rJl'{u b,run<
Salr iole Valley j I ,I
SCALE 1 :24 000
80
MAGNA QUADRANGLE
UTAH-SALT LAKE COUNTY
7.5-MINLITE SERIES
" rn;
: NPJ Location