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Confidential Client
Ontario, Canada
Project
Ex Situ Treatment of Soil Containing
Hydraulic Oil and Diesel Fuel
Summary
Ex situ treatment of approximately 4,000
tons of soil impacted with hydraulic oil and
diesel fuel at a former manufacturing facility in
Georgetown, Ontario were treated using Adventus'
TERRAMENDT technology. TERRAMEND™
effectively reduced contaminant concentrations to
below the remedial goals in approximately 10
months of treatment.
The Challenge
Our goal was to achieve the remedial standard of
1,000 mg/kg for heavy oils and 100 mg/kg for
gas/diesel in all sampling zones. At this site
the client was particularly sensitive to
treatment costs, and a very low cost approach was
required. Due to this constraint treatment
proceeded more slowly than otherwise possible;
however remedial costs were kept very low.
The Solution
Prior to application of TERRAMEND™, the
soil was excavated and placed in a lined
remediation cell to a thickness of approximately
2 feet. Soils were then tilled to ensure
homogenization. Following cell preparation,
TERRAMEND™ was applied using a
site-specific aerobic protocol. The technology
involved the addition of a blend of nutrients and
soil conditioners designed to optimize the rate
of microbial activity in the soil. The process
also required the maintenance of soil moisture
content at approximately 50% of the soil water
holding capacity. Maintenance of the soil
moisture content was accomplished through
irrigation and tillage. A specialized deep rotary
tiller was used to till to a depth of 2 feet;
this also served to maintain an aerobic soil
environment.
The Result
Active treatment of the soil occurred within the
treatment cell for a period of approximately 9
months, from August 2000 to September 2001, with
a 5 month inactive period from December 2000 to
April 2001). During this period soil hydrocarbon
concentrations were reduced by approximately 99%.
All hydrocarbon concentrations were reduced to
less than the established remedial standard of
1,000 mg/kg for heavy oils and 100 mg/kg for
gas/diesel in all sampling zones. Following
treatment, the mean concentration of heavy oil
hydrocarbons was 67 mg/kg, while the mean
concentration of the gas/diesel range
hydrocarbons was 3 mg/kg.
The Cost
The cost to treat soil at this site was US$20/ton
of soil treated. This cost included all cell
construction and treatment application costs and
excluded excavation and final disposition of
treated soil. Decommissioning of the treatment
facilities and end-point analytical costs were
also excluded.
The Timeline
Approximately 9 months, from August 2000 to
September 2001, with a 5 month inactive period
from December 2000 to April 2001.
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Reduction of total petroleum
hydrocarbon concentrations (TPH) using
TERRAMEND at a former manufacturing facility in
Ontario, Canada.
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April 23,
1998
(Initial Soil Characterization) |
Sept. 11,
2000
(1st Progress Sampling) |
Aug 13,
2001
(2nd Progress Sampling) |
Dec. 5,
2001
(Final Progress Sampling) |
Gas/Diesel
Range |
__* |
__ |
27 |
3 |
| Heavy Oil Range |
__ |
__ |
608 |
67 |
| TPH |
7,820 |
678 |
625 |
70 |
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RDE**(%) |
N/A |
91 |
92 |
99 |
* Not determined.
** Removal and Destruction Efficiency for
TPH
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