The pollution was made of different hydrocarbon products (diesel, jet fuels, heavy fuels…) and the concentrations levels rose from 2,000 to 30,000 mg/kg TPH.
The target levels to be reached were determined according to the definition of a Hazard Index calculated in function of risk analysis and the impact of each contaminant on human health.
To have a limited environmental impact, all soil have to be treated on site, that’s means no soil can be treated outside in landfill for example.
Based on SUEZ experience, a strategy has been defined including environmental impact and cost effective.
Biological treatment by “land farming” and by air injection-extraction: the biological treatment technique is based on developing microorganisms bringing about a metabolic degradation in the biodegradable organic molecules.
These reactions correspond to a break in carbonated chains. The residual products are mainly mineral compounds, H20 and CO2, presenting no danger to the environment.
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