DERR-2024-004393

Table of Contents
1.Internal Memorandum
2.Site Maps
3.RBCA Tier 1 Worksheet
4.Soil and Groundwater Analytical
Results
5.Topographic Map
6.Water Rights Map
Closure Packet for No Further Action
Facility ID 5000212 Release ID
OJP
located at 239 South Highway 94,
Thompson Springs, Utah
Facility Information
Facility Name:UDOT STA # 4454 Release ID:OJP
Facility Address:239 S HWY 94 THOMPSON, UT 84540 Facility ID:5000212
Notification Date:12/19/2023
Owner Name:UTAH STATE FUEL NETWORK Reporting Party:Aaron Spackman
Owner Address:4315 S 2700 W SALT LAKE CITY, UT 84129 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 4000 Yes
Diesel Unkn 6000 Yes
Waste Oil
Unknown
Other
Tank Piping Disp Free Prod Cont Soil
Sources Removed:Yes No No 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):
8'ML-Inorganic silts/fine
sands
USC-1
OL-Organic silts & clays USC-2
Method of Soil Type Identification:Unified Soil Classification
d. Groundwater Information
Was groundwater encountered?:Yes Thickness of Free Product:NA
Depth to groundwater
(feet below land surface):
8'Is groundwater impacted at any
concentration:
Yes
Groundwater flow direction:NW Inferred Slope direction of surface topography:NW
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' - GW-1 Sewer Line:>30' - GW-1 Building Desc:Industrial
Electrical:>30' - GW-1 Natural Gas:>30' - GW-1 Other Desc:
Building:>30' - GW-1 Telephone:>30' - GW-1
Property Line >30' - GW-1 Storm Drain:>30' - GW-1
Other(specify): -
Receptors Within 500 feet:
Municipal Well:>500 Domestic Well:>500 Irrigation Well:>500
Other:
Surface Water(specify type: lake, stream, creek, river, wetland):Dist: 200' Desc: Wash Out Pond
Utah's RBCA Tier 1 Worksheet
Printed on: 1/26/2024 11:04:45 AM
Facility History - Executive Summary
Two tanks, one diesel and one gasoline, were decommissioned at the Utah State Fuel Network location in Thompson Springs on
10/10/02023. The tanks were removed of 185 gallons of fuel and sludge, then cleaned. They were then inerted with dry ice and
delivered to Grand County Landfill for disposal. The product from the tanks was delivered to Sump and Trap Cleaning in West Salt
Lake City.
Removal and closure sampling was conducted by Aaron Spackman of Spackman Enterprises. The grab samples showed elevated
levels of Benzene, TPH-GRO, TPH-DRO. Corrective action deemed unnecessary due to lack of the mobility of the remaining
contamination as well as no surrounding potential receptors.
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 0.016 GW-1 0.20/0.90 ND NA
Toluene 1.0/3.00 0.122 GW-1 9.0/25.0 ND NA
Ethylbenzene 0.7/4.00 0.02 GW-1 5.0/23.0 ND NA
Xylenes 10.0/10.0 0.15 GW-1 142.0/142.0 ND NA
Napthalene 0.70/0.70 ND NA 51.0/51.0 ND NA
MTBE 0.20/0.20 ND NA 0.30/0.30 ND NA
TPH-gasoline 1.0/10.0 1.32 GW-1 150/1500 ND NA
TPH-diesel 1.0/10.0 4.2 GW-1 500/5000 ND NA
Oil and Grease/TRPH 10.0/10.0 NA NA 1000/10000 ND 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: 1/26/2024 11:04:45 AM
1/26/2024
Soil and Groundwater Analytics