SERVICE

In Situ Treatment

The goal of in situ soil treatment is to lower the concentration of one or more contaminants by applying a treatment directly to the affected area. In situ soil treatment helps reduce environmental liability and improve soil quality while limiting the environmental impact and circumnavigating certain physical constraints, such as the depth of the contamination and the presence of buildings or infrastructure.

Different in situ treatment technologies are available; however, to ensure optimal results, each project requires a prior assessment to determine the most suitable treatment according to site conditions. This exhaustive environmental assessment (Phase II or Phase III) establishes the site conditions to consider when designing and applying a suitable treatment. It may also be necessary to conduct preliminary trials or pilot programs, whether in the laboratory or onsite.

In situ Treatment Technologies

Biological

  • Bioaugmentation

Adding suitable microorganisms to the contaminants to break them down.

  • Aerobic and anaerobic biostimulation

Adding specific compounds to create conditions that promote the activity of the microorganisms that break down the contaminants.

  • Phytoremediation

Using appropriate plants to extract the contaminants from the soil through various mechanisms, including absorption, deterioration, accumulation and volatilization.

Chemical

  • Washing

Adding a detergent or surfactant to the soil to promote the desorption and extraction of the contaminants.

  • Chemical oxidation

Adding oxidants to help volatilize or break down the contaminants.

Thermal 

  • Hydraulic control to limit the migration of contaminants

A system for recovering and treating contaminated groundwater and free-phase products (mobile treatment unit or permanent system).

  • Wetland filtration and other passive treatment methods

Thanks to their expertise, the multidisciplinary team of professionals at Terrapex Environnement Ltd can advise you and propose a custom in situ treatment program. The selection of recommended technologies depends on the contaminants to be treated, the geological and hydrogeological context and the intrinsic physical constraints of the site, among other considerations.

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