1
Frederick C Payne: Method of removing and controlling volatile contaminants from the vadose layer of contaminated earth. Midwest Water Resource, Thomas J Dodd, March 15, 1988: US04730672 (80 worldwide citation)

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 co ...


2
Frederick C Payne, Jerry B Lisiecki: Apparatus and process for removing volatile contaminants from below ground level. Midwest Water Resource, Thomas J Dodd, August 7, 1990: US04945988 (43 worldwide citation)

A process for removing and disposing of or neutralizing volatile contaminants existing in the vadose zone of earth and also in a below ground aquifer. The process includes the injection of substantially oxygen free air into the aquifer to retard the formation of aerobic bacteria and injection of oxy ...


3
Frederick C Payne: Portable on site soil treatment system. Midwest Water Resource, Thomas J Dodd, April 24, 1990: US04919570 (40 worldwide citation)

Treatment apparatus for contaminated soils which includes a plurality of interconnected vessels which are cyclically connected to a pumping station and a treatment station. Contaminated soil is excavated and placed in the treatment vessels which are then sealed prior to activation of the pump, which ...


4
Frederick C Payne: Method of removing volatile contaminants from contaminated earth strata. Midwest Water Resource, Thomas J Dodd, January 2, 1990: US04890673 (39 worldwide citation)

A method and apparatus of collecting volatile contaminants from a contaminated 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 volatilize ...


5
Frederick C Payne: Well construction method. Midwest Water Resource, Thomas J Dodd, September 24, 1991: US05050677 (3 worldwide citation)

A method of constructing a well into which conduit is inserted to inject air or to withdraw contaminated fluid from an underground plume. The method involves forming a borehole of a specified depth and partially filling the hole with a material of high fluid porosity. After the conduit is inserted i ...