Soil decontamination
After having confirmed the presence of a contamination with an environmental characterization phase II and delimit the contamination in surface and depth with an environmental characterization phase III, environmental rehabilitation works are recommended for the soil decontamination.
Enviro-Experts uses two methods of soil decontamination, either in-situ or ex-situ. The ex-situ remediation technique (excavation of contaminated soil) is:
- Define the contaminated area
- Excavate the contaminated soil
- Sample walls and base of excavated area to an acceptable level according to MDDELCC criteria
- Dispose of contaminated soil in a treatment site authorized by the MDDELCC
- Conduct environmental monitoring of soil and groundwater quality
- Fill the excavated area with clean soil
The in-situ remediation technique (without the excavation of soil) is done by creating access points through wells, needles or pits to promote a circulation of fluids in the contaminated zone by pumping or injecting water, air or reactive products. The treatment could be done by bio-ventilation, sparging, injection of chemical oxidants or bio-treatment by bacteria.
The choice of decontamination method depends on several parameters:
- Structure and composition of soil: clay, silty, sandy, etc ...
- Position of the contamination: deep or close to the surface
- Nature of the contamination: organic, inorganic, soluble, insoluble, etc ...
- Current state: land exploited, built or vacant
- Duration of the remediation
We are on the lookout for new environmental technologies and we are developing them in collaboration with the « Centre Eau Terre Environnement-Institut National de Recherche Scientifique ».
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