Soil Vapour Extraction
Soil vapor extraction (SVE) is a remedial technology that removes harmful chemicals from the soil.
Introduction
Soil vapour extraction (SVE) ,also known as "soil venting" or "vacuum extraction", is an in situ remedial technology that reduces concentrations of volatile and some semi-volatile (VOC and SVOC) constituents in petroleum products adsorbed to soils in the unsaturated (vadose) zone. In this technology, a vacuum applied through extraction wells creates a negative pressure gradient, causing volatile constituents to evaporate and migrate toward the wells. Extracted vapour is then treated as necessary (commonly with carbon adsorption) before being released to the atmosphere.
Remediation techniques
The increased air flow through the subsurface can also stimulate enhanced biodegradation of some of the contaminants, especially those that are less volatile such as those associated with diesel, kerosene or heavier oils. In areas of high groundwater levels, water table depression pumps may be required to offset the effect of upwelling induced by the vacuum or to increase the depth of the vadose zone.
Site Clearance
Before work can begin, it is often necessary to clear the site of any existing structures, vegetation, and waste.
Get in touch today
