Remediation is based on the physical removal of pollutant by its pumping with the contaminated groundwater and separation of the free or dissolved phase on the surface (oil hydrocarbons, toxic metals). This method is primarily deployed for the removal of the free phase product. Furthermore, it serves for the creation of the hydraulic depression that prevents the spread of the pollution or the leak of applied remediation reagents beyond the target area.
The treatment part of the technology utilizes decontamination stations where gravity-sorption separators, activated carbon filters, or appropriate precipitation agents help with the water remediation.
Finally the treated water may be recirculated back into the ground by injection wells in order to steepen the local hydraulic gradient, to mobilize/wash out the pollutants sorbed in the vadose zone, and to re-establish the saturated zone water balance.
