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Background
The former refinery, covering an area in excess of 77 hectares,
had been in operation for some 55 years. Following the dismantling
of the refinery and storage installations, contaminated soil and
sludge, as well as refinery wastes, were excavated and temporarily
stockpiled. Thermal treatment of the contaminated material was the
initial selected remedy and total project cost amounted to nearly
$50 M. As Biogenie was involved in the final excavation procedures,
we requested that samples of the contaminated material be sent to
our laboratory in order to perform a treatability study.
Solution
On the grounds of the treatability study results, Biogenie proposed
a guaranteed (lump-sum, pay-for-performance) remedial solution,
which provided our client with close to $38 M in savings.
The remedial strategy was based upon the application of an ex situ
biological treatment process to the stockpiled material. Avoiding
further displacement of the contaminated material was a key feature
of the strategy providing substantial cost savings. From a technical
standpoint, customizing the selected biotreatment process was a
challenge in itself when considering the type of contaminants and
material (heavy hydrocarbons in a clayey soil) as well as the sheer
size of the project. The project was completed two years ahead of
schedule, facilitating the sale of the property to a multinational
petrochemical corporation.
Services
- Management
and supervision of the excavation and temporary stockpiling of
refinery wastes as well as contaminated soil and sludge;
- Confinement
and recovery of free-phase product;
- Recovery
and treatment of hydrocarbon-contaminated groundwater;
- Treatability
study to confirm that the cleanup criteria are within reach and
to determine optimal biotreatment parameters;
- Biological
treatment of 800,000 tons of material consisting mainly
of clayey soils impacted with heavy hydrocarbons.
Biogenie
is proud of this achievement where our technical know-how, as well
as our engineering and project management capabilities, were key
to the success of this project.
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