04730672 is referenced by 80 patents and cites 14 patents.

A method and apparatus of collecting volatile contaminants from the vadose layer of earth. The apparatus is a closed-loop device which includes one or more contaminant withdrawal wells surrounded by multiple air reinjection wells connected by a conduit. One or more pumps serve to draw volatilized contaminant through the withdrawal well to the connecting conduit where it is captured or neutralized. Residual air from the withdrawal well is urged back into the ground through the air reinjection wells to encourage further contaminant to move toward the withdrawal well for collection.

Title
Method of removing and controlling volatile contaminants from the vadose layer of contaminated earth
Application Number
7/22105
Publication Number
4730672
Application Date
March 4, 1987
Publication Date
March 15, 1988
Inventor
Frederick C Payne
Charlotte
MI, US
Agent
Thomas J Dodd
Assignee
Midwest Water Resource
MI, US
IPC
E21B 43/40
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