Soil Vapour Extraction

In cases where the contaminants are volatile, a venting and ex-situ gas treatment system can be applied.

Soil vapour extraction is a technology that has been proven effective in reducing concentrations of VOC and certain semi-volatile organic compounds. Principally, a vacuum is applied to the soil matrix to create a negative pressure gradient that causes movement of vapours toward extraction wells.

Volatile contaminants are readily removed from the subsurface through the extraction wells. The collected vapours are then treated and discharged to the atmosphere or where permitted, reinjected to the subsurface.


This flowchart illustrates all possible stages of the remediation process and is fully interactive; click on each process box for a detailed description...