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System for the removal of contaminant soil-gas vapors

United States Patent

5,697,437
December 16, 1997
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
A system extracts contaminated vapors from soil or other subsurface regions by using changes in barometric pressure to operate sensitive check valves that control air entry and removal from wells in the ground. The system creates an efficient subterranean flow of air through a contaminated soil plume and causes final extraction of the contaminants from the soil to ambient air above ground without any external energy sources.
Weidner; Jerry R. (Iona, ID), Downs; Wayne C. (Sugar City, ID), Kaser; Timothy G. (Ammon, ID), Hall; H. James (Idaho Falls, ID)
Lockheed Idaho Technologies Company (Idaho, ID)
08/ 569,045
December 7, 1995
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. DE-AC07-76ID01570 between the United States Department of Energy and Lockheed Idaho Technologies Company.