1
Jeffery F Billings, Gale K Billings: Subsurface contaminant remediation, biodegradation and extraction methods and apparatuses. Environmental Improvement Technologies, Deborah A Peacock, Rod D Baker, June 22, 1993: US05221159 (84 worldwide citation)

Methods and apparatuses for removing contaminants from soil and an associated subsurface groundwater aquifer. An injection well(s) is drilled through the vadose zone to a depth below the water table defining the upper boundary of the aquifer. An extraction well is established to a depth above the wa ...


2
Jeffery F Billings, Gale K Billings: Contaminant remediation, biodegradation and removel methods and apparatus. Environmental Improvement Technologies, Deborah A Peacock, Rod D Baker, Jeffrey D Myers, January 11, 1994: US05277518 (51 worldwide citation)

Methods and apparatuses for removing contaminants. A plurality of injection wells are drilled through the vadose zone to a depth below the water table defining the upper boundary of the aquifer. A plurality of venting wells or venting laterals are established to a depth above the water table suffici ...


3
Jeffery F Billings, Gale K Billings: Contaminant remediation, biodegradation and volatilization methods and apparatuses. Environmental Improvement Technologies, Deborah A Peacock, Rod D Baker, Jeffrey D Myers, December 5, 1995: US05472294 (42 worldwide citation)

Methods and apparatuses for removing contaminants. At least one injection well is drilled through the vadose zone to a depth below the water table defining the upper boundary of the aquifer. A plurality of venting wells or venting laterals are established to a depth above the water table sufficient ...


4
Jeffery F Billings, Gale K Billings: Contaminant remediation, biodegradation and volatilization methods and apparatuses. Deborah A Peacock, Donovan F Duggan, August 5, 1997: US05653288 (11 worldwide citation)

Methods and apparatuses for removing contaminants. At least one injection well is drilled through the vadose zone to a depth below the water table defining the upper boundary of the aquifer. A plurality of venting wells or venting laterals are established to a depth above the water table sufficient ...