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Improved process and apparatus for groundwater extraction using a high vacuum process

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Disclosed is a process for removing contaminants from a contaminated area of the ground having a vadose zone (16) and a water table (18). The process comprises providing a borehole (42) in the contaminated area; placing in the borehole a perforated riser pipe (44) inside of which is situated a vacuum extraction pipe (30) with an opening situated near at or at any point below the water table within the perforated riser pipe; while introducing a gas into the riser pipe applying a vacuum to the vacuum extraction pipe to draw gases and liquid from the soil into the perforated riser pipe and from the riser pipe into the vacuum extraction pipe and transport both the gases and the liquid to the surface as a common stream; forming from the common stream a stream which is primarily liquid and a stream which is primarily gaseous; and separately treating the separated liquid and gas streams.; Also disclosed is an apparatus for carrying out the process.

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