Vacuum Vapour Extraction

The conventional technique of Soil Vapour Extraction has proven to be a practical and inexpensive method for the removal of volatile and semi-volatile hydrocarbons from the unsaturated zone. Soil Vapour Extraction is conventionally carried out using small-sized boreholes which extend to just under the groundwater table and are outfitted with screens of diameters up to 50 mm. Depending on the size of the equipment and the properties of the soil, blowers are usually operated at pressure differences of 100 to 300 millibars. This high negative pressure draws perched or capillary water into the venting system.

Directed Soil Air Circulation systems (SAC) are employed for the remediation by Bioventing of soil contaminated with volatile hydrocarbons by enhancing the IEG Vacuum Vapor Extraction (IEG VVE) technique. In addition, they can be used to inject gas into the soil for the stimulation of biological or chemical degradation.

Directed Soil Air Circulation systems (SAC) are employed for the remediation of soils contaminated with volatile hydrocarbons by enhancing the IEG Vacuum Vapor Extraction (IEG-VVE) technique. In addition, they can be used to inject gas into the soil for the stimulation of biological or chemical degradation.