DERR-2024-012970

Rockwell Solutions, Inc., 718 E. Bridger Lane, Elk Ridge, UT 84651, 801-361-2930, [e-mail]
Rockwell Solutions, Inc.
718 E Bridger Lane
Elk Ridge, UT 84651
[phone]
August 14, 2023

Mr. Bob Shepherd
25 S 200 East
Levan, Utah 84639

Re: Landfarm Sampling Report
Shepherd Residence, 25 S 200 East, Levan, Utah
Release ID: ODU

Dear Mr. Shepherd:

On April 4, 2022, Senergy Petroleum was loading an above ground tank at the above referenced site
when the tank burst and approximately 1,500 gallons of red-dyed diesel fuel was released. The fuel
flowed west of the tank and spread out across the dirt driveway and along the front edge of the
residential property, saturating the top few inches of soil. See Figure 1.

The impacted soil was immediately removed by scraping the soil with a front-end loader and hauling it
to Shepherd property northeast of the site where it was spread out across the dirt road to aerate.
Approximately 80-90 cubic yards of soil were removed.

On June 8, 2023, Rockwell Solutions collected soil samples from the landfarm. Samples were
collected from four to eight inches below ground surface. Sample locations are shown on Figure 1.
Samples were analyzed for benzene, toluene, ethylbenzene, total xylenes, naphthalene (BTEXN) using
EPA Method 8260B and total petroleum hydrocarbons-diesel range organics (TPH-DRO) using EPA
Method 8015b.

Laboratory analytical results are shown in Table 1. TPH-DRO concentrations remain above Tier 1
levels in samples SS#2 – SS#4, along most of the landfarm area. The landfarm area should be turned
to expose more of the soil to the air and sun. Another round of samples will be collected in 2024.

If you need additional information or have any questions, please contact me at [phone].

Sincerely,

David S Hansen
Certified UST Consultant CC0130
Rockwell Solutions, Inc.

cc: Eileen Brennan, DERR
Figure 1 Landfarm Sampling
Map
NORTH
Approx. scale in feet
00 80
Robert Shepherd Landfarm
Silo Lane
Levan, Utah
Generator
N, 1’NE, 1’
Mid, 2’E, 1.5’
S, 1.5’
SE, 2’
Battery
Trailer
Area of Excavation
Tank
SS#1
SS#2
SS#3
SS#4
Landfarm Area
SS#2 Sampling Location
Sample Depth Date
Benzene
(mg/kg)
Toluene
(mg/kg)
Ethyl-
benzene
(mg/kg)
Xylenes
(mg/kg)
Naph-
thalene
(mg/kg)
TPH-DRO
(mg/kg)
SS#1 4-8" 6/8/2023 <0.009 <0.02 <0.02 <0.02 <0.02 <50
SS#2 4-8" 6/8/2023 <0.009 <0.02 <0.02 <0.02 <0.02 10,400
SS#3 4-8" 6/8/2023 <0.008 <0.02 <0.02 <0.02 <0.02 9,920
SS#4 4-8" 6/8/2023 <0.009 <0.02 <0.02 <0.02 <0.02 5,120
0.2 9 5 142 51 500
0.9 25 23 142 51 5,000
TPH-DRO = total petroleum hydrocarbons-diesel range organics
BTEXN analyzed by EPA Method 8260.
TPH-DRO analyzed by EPA Method 8015
Table 1
Landfarm Sample Results
Bob Shepherd Feed Lot
Silo Lane, Levan, Utah
Initial Screening Levels
RBCA Tier 1 Screening Levels
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
Rockwell Solutions, Inc
Attn: Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
Work Order: 23F0844
Project: Bob Shepherd Home
6/15/2023
Approved By:
Mark Broadhead, Project Manager
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 7
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
6/9/23 15:16 @ 7.3 °C
6/15/2023
Bob Shepherd Home
Sample ID: SS #1
Lab ID: 23F0844-01Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 6/8/23 15:35
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
Inorganic
%6/14/236/13/230.1 CTF800096.5Total Solids
Diesel Range
mg/kg dry 6/15/236/14/2350EPA 8015C/3550BNDDiesel Range Organics
Volatile Organic Compounds
mg/kg dry 6/13/236/13/230.009 EPA 8260D /5030ANDBenzene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDEthylbenzene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDNaphthalene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDToluene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDXylenes, total
Project Name: Bob Shepherd Home CtF WO#: 23F0844
www.ChemtechFord.com
Page 2 of 7Page 2 of 7
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
6/9/23 15:16 @ 7.3 °C
6/15/2023
Bob Shepherd Home
Sample ID: SS #2
Lab ID: 23F0844-02Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 6/8/23 15:40
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
Inorganic
%6/14/236/13/230.1 CTF800097.7Total Solids
Diesel Range
mg/kg dry 6/15/236/14/2350EPA 8015C/3550B10400Diesel Range Organics
Volatile Organic Compounds
mg/kg dry 6/13/236/13/230.009 EPA 8260D /5030ANDBenzene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDEthylbenzene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDNaphthalene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDToluene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDXylenes, total
Project Name: Bob Shepherd Home CtF WO#: 23F0844
www.ChemtechFord.com
Page 3 of 7Page 3 of 7
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
6/9/23 15:16 @ 7.3 °C
6/15/2023
Bob Shepherd Home
Sample ID: SS #3
Lab ID: 23F0844-03Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 6/8/23 15:45
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
Inorganic
%6/14/236/13/230.1 CTF800097.7Total Solids
Diesel Range
mg/kg dry 6/15/236/14/2350EPA 8015C/3550B9920Diesel Range Organics
Volatile Organic Compounds
mg/kg dry 6/13/236/13/230.008 EPA 8260D /5030ANDBenzene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDEthylbenzene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDNaphthalene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDToluene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDXylenes, total
Project Name: Bob Shepherd Home CtF WO#: 23F0844
www.ChemtechFord.com
Page 4 of 7Page 4 of 7
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
6/9/23 15:16 @ 7.3 °C
6/15/2023
Bob Shepherd Home
Sample ID: SS #4
Lab ID: 23F0844-04Matrix: Solid
Flag(s)Units
Analysis
Date/Time
Date Sampled: 6/8/23 15:50
Preparation
Date/Time
Sampled By: David Hansen
Minimum
Reporting
Limit MethodResult
Inorganic
%6/14/236/13/230.1 CTF800097.5Total Solids
Diesel Range
mg/kg dry 6/15/236/14/2350EPA 8015C/3550B5120Diesel Range Organics
Volatile Organic Compounds
mg/kg dry 6/13/236/13/230.009 EPA 8260D /5030ANDBenzene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDEthylbenzene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDNaphthalene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDToluene
mg/kg dry 6/13/236/13/230.02 EPA 8260D /5030ANDXylenes, total
Project Name: Bob Shepherd Home CtF WO#: 23F0844
www.ChemtechFord.com
Page 5 of 7Page 5 of 7
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
Rockwell Solutions, Inc
Dave Hansen
718 East Bridger Lane
Elk Ridge, UT 84651
PO#:
Receipt:
Date Reported:
Project Name:
6/9/23 15:16 @ 7.3 °C
6/15/2023
Bob Shepherd Home
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: Bob Shepherd Home CtF WO#: 23F0844
www.ChemtechFord.com
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