Importance

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Abstract

A vacuum extraction tube is placed within a well casing which is permeable to gas and water at least within the vertical range of contaminated soil from which vapors and/or water are to be removed. The extraction tube has its lower open end extending a few inches above the water table. An internal venturi nozzle or passage adjacent the lower open end of the extraction tube is in exterior communication with one end of a siphon tube depending therefrom. The siphon tube has its opposite extend extending below the surface of the water in the casing, at least to a depth of contaminant-bearing soil from which vapors or water are to be removed. When vacuum is applied to the extraction tube through the exhaust end of a blower, self-priming air from within the casing is entrained upwardly through the open end of the extraction tube. As air velocity increases through the venturi passage, vacuum is created at the connection of the siphon tube to the venturi and lifts well water to the venturi passage where the water is atomized.

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First Claim