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| Number | Title | Issue Date |
| 7386957 | Non-intrusive vapor collection apparatus A non-intrusive vapor collection and abatement apparatus comprises an above-floor mat with a collection space underneath the above-floor mat within which air can pass freely hut which is surrounded by a substantially vapor-proof barrier. A vacuum or suction may be a... | 06/17/2008 |
| 7213642 | Multi-fluid sparging A diffuser useful for sparging to remove contaminant in situ is described. The diffuser includes a first elongated member having a sidewall with a first portion of the length of the sidewall being microporous, and a second portion of the length of the sidewall havin... | 05/08/2007 |
| 7156988 | Floating product removal A system and method for removing floating product from an aquifer. The system includes a groundwater-depressing mechanism configured to create a depression in a groundwater surface that encourages migration of floating product to the depression. The system also incl... | 01/02/2007 |
| 6971820 | Microblower assisted barometric valve A gas exchange apparatus is provided which provides for both passive fluid flow and blower associated fluid flow through a barometric valve. A battery powered blower is provided which allows for operation of the barometric valve during times when the barometric valv... | 12/06/2005 |
| 6913420 | Fluid movement apparatus Apparatus suitable for venting and dispensing gas from an area of ground. The apparatus comprising a passage arrangement locatable in the ground extending generally horizontally and formed from a plurality of self-supporting open units. One or more columns extends d... | 07/05/2005 |
| 6908559 | Process for treating a solid-liquid mixture A process for treating a solid-liquid mixture by cavitation to decompose at least some contaminant associated with the solid particles, the contaminant either being absorbed into the pores of the solid or onto the surface of the solid particles. The process includes... | 06/21/2005 |
| 6746605 | Multi-arrayed vacuum recovery method and system for groundwater wells A method and system for removing free phrase product from the surface of a subterranean body of water includes a plurality of extraction sites. The extraction sites extend below ground and intersect the free product. Each of the plurality of extraction sites is in c... | 06/08/2004 |
| 6742962 | Infiltration and gas recovery systems for landfill bioreactors A trench located in a landfill including the combination of a liquid infiltration piping system and a horizontal gas withdrawal piping system, the combination allowing for simultaneous liquid infiltration and gas withdrawal from a landfill. ... | 06/01/2004 |
| 6706096 | Method and system for protecting buildings from subsurface gases Subterranean gases are removed from a building site by drawing air from ambience and passing the air through an air permeable bed of materials (10) located at the site as a diffused air stream. The subterranean gases become entrained in the diffused air strea... | 03/16/2004 |
| 6632047 | Heater element for use in an in situ thermal desorption soil remediation system An in situ thermal desorption (ISTD) soil remediation system may be used to remove or reduce contamination within soil. Heat may be transferred to the soil from resistively heated, bare metal heater elements. The heater elements may be placed directly wit... | 10/14/2003 |
| 6485232 | Low cost, self regulating heater for use in an in situ thermal desorption soil remediation system An in situ thermal desorption soil remediation system may be used to remove contamination from soil. Heat may be applied to the soil by metallic strip heaters that have large cross sectional areas as compared to conventional heater elements. The strip hea... | 11/26/2002 |
| 6464005 | Remediation method A method of remediating a site of earth and groundwater contamination includes the steps of drilling at least one injection well, and preferably a plurality of injection wells, into the groundwater in a contaminated area. At least one, and preferably a pl... | 10/15/2002 |
| 6379083 | Method for the remediation of soil contaminated with organic halide compounds A method for the remediation of contaminated soil comprising causing a carbonic acid aqueous solution to penetrate into the soil to liberate and remove contaminants contained in the soil.... | 04/30/2002 |
| 6254311 | Removal of ground contaminents Removal of Light, non-Aqueous Phase Liquids (LNAPLs) from contaminated soils is expedited by injecting gas into extraction wells. The extraction wells are operated with a vacuum assist which produces a mounding of groundwater around the well. Gas is injec... | 07/03/2001 |
| 6189614 | Oil and gas production with downhole separation and compression of gas A method and system for producing a mixed gas-oil stream through a wellbore wherein at least a portion of the gas is separated from the stream downhole and is compressed (e.g. using a SPARC) before both the compressed gas and the remainder of the stream i... | 02/20/2001 |
| 6149345 | High-vacuum groundwater and soil remediation system and related method and apparatus Systems and techniques for remediation of soil, vapor and groundwater contaminated with hydrocarbons. The system is ideally suited for easy integration into a mobile remediation unit that uses a liquid ring vacuum pump to extract a contaminated mixture fr... | 11/21/2000 |
| 6048134 | Automatic aspirator air control system A method and apparatus for sustaining optimum fluid entrainment conditions in a contaminant extraction well is disclosed. More specifically, the present invention includes a central controller which communicates with a pressure detector and an aspiration ... | 04/11/2000 |
| 6024868 | Air flow control circuit for sustaining vacuum conditions in a contaminant extraction well The present invention discloses a method and apparatus for extracting contaminants from the ground using a vacuum extraction process. Specifically, the invention discloses a circuit that can control the flow of atmospheric air into a vacuum extraction wel... | 02/15/2000 |
| 5984578 | Apparatus and method for in situ removal of contaminants using sonic energy In preferred embodiments, an apparatus and method for enhancing the in situ removal of at least one contaminant from a contaminated body, the body being provided with at least one interstice, by generating and focusing vibrations toward the interstice, th... | 11/16/1999 |
| 5893680 | Volatile contaminant extraction from subsurface apparatus and method The present invention is a soil remediation system which uses naturally occurring barometric pressure oscillations to remediate volatile contamination in the vadose zone. By applying a surface seal, a collection plenum and a unidirectional gas relief valv... | 04/13/1999 |
| 5860767 | High-vacuum groundwater and soil remediation system and related method and apparatus Systems and techniques for remediation of soil, vapor and groundwater contaminated with hydrocarbons. The system is ideally suited for easy integration into a mobile remediation unit that uses a liquid ring vacuum pump to extract a contaminated mixture fr... | 01/19/1999 |
| 5709505 | Vertical isolation system for two-phase vacuum extraction of soil and groundwater contaminants Disclosed is a process for removing contaminants from a contaminated area of the subsurface which comprises providing a borehole in the contaminated area; placing in the borehole a perforated riser pipe inside of which is situated a vacuum extraction pipe... | 01/20/1998 |
| 5688076 | High-vacuum groundwater and soil remediation system and related method and apparatus Systems and techniques for remediation of soil, vapor and groundwater contaminated with hydrocarbons. The system is ideally suited for easy integration into a mobile remediation unit that uses a liquid ring vacuum pump to extract a contaminated mixture fr... | 11/18/1997 |
| 5655852 | High vacuum extraction of soil contaminants along preferential flow paths Disclosed is a process and apparatus for removing contaminants from a contaminated area of the ground, the ground having a plurality of paths of preferential flow at different depths, which process comprises providing a borehole in the contaminated area t... | 08/12/1997 |
| 5622450 | Pressure extraction process for removing soil and groundwater contaminants A pressure extraction process for removal of underground contaminants from subsurface soil and groundwater comprises establishing a well through the unsaturated soil into the underlying groundwater unit, with the well including an exterior pipe having flu... | 04/22/1997 |
| 5613805 | Device for cleaning contaminated topsoil In an apparatus for aspirating gases, in particular from topsoil, an effective explosion protection can be attained by having a negative-pressure fan or negative-pressure generator formed as a water-ring pump.... | 03/25/1997 |
| 5611402 | Method of in-situ remediation of volatile contaminants from soils and/or rock A process for removing volatile contaminants from soils and/or rock in the undersaturated or vadose zone involves drilling one or more boreholes into undersaturated soils and/or rock to a level below the delineated contaminants or to the top of the water ... | 03/18/1997 |
| 5586836 | Bootstrapping process optimization for two phase vacuum extraction systems A system for receiving an effluent stream of liquids and gases from a vacuum extraction system is disclosed. The system uses the water separated from the effluent stream by a knock out pot to cool recirculating water, provide seal water and/or provide mak... | 12/24/1996 |
| 5577558 | In-well device for in situ removal of underground contaminants A method and apparatus for achieving in situ bioremediation of volatile contaminants in the vapor phase and dissolved or dispersed contaminants in the groundwater phase at a contaminated site. The apparatus of this invention is configured to be used withi... | 11/26/1996 |
| 5575585 | Multiple well contaminant recovery apparatus The apparatus is a chamber within a ground excavation filled with porous material, with multiple angled well shafts projecting outward and down from the chamber. A pump located within the chamber pumps ground water from the several well shafts to a collec... | 11/19/1996 |
| 5509757 | Fluid extraction device A fluid extraction device to remove fluid contaminants from the vadose zone of unsaturated subsurface area by selectively evacuating liquid and gas therefrom comprising a lower well screen assembly coupled to a vacuum source through an upper fluid conduit... | 04/23/1996 |
| 5403119 | Perforated piling for soil remediation An apparatus for recovering VOC contaminants from a surface or subsurface release. In one embodiment, the invention includes at least one vertical extraction piling having an interior void space and at least one perforated surface on the exterior of the p... | 04/04/1995 |
| 5387057 | Contaminated ground site remediation system A system and method of remediating a ground site contaminated with volatile chemical material such as volatile organic compounds (VOC). The system includes an array of elongated spaced dewatering wells embedded into the contaminated ground for lowering th... | 02/07/1995 |
| 5383747 | System for treating a subterranean formation having an aquifer contaminated with organics The specification discloses a system for treating a subterranean formation having an aquifer contaminated with organics wherein organics are removed from the formation through an extraction well and a negative pressure is supplied to the formation through... | 01/24/1995 |
| 5380126 | Method of and arrangement for rinsing out impurities from ground A device for rinsing contaminants from ground comprises a perforated well tube sunk through a well shaft in the ground to ground water. The ground water is received in the well shaft through lower perforations, pumped up the well shaft, and out to upper g... | 01/10/1995 |
| 5380125 | Fluid extraction device A fluid extraction device to remove fluid contaminants from the vadose zone of unsaturated subsurface area by selectively evacuating liquid and gas therefrom comprising a lower well screen assembly coupled to a vacuum source through an upper fluid conduit... | 01/10/1995 |
| 5358357 | Process and apparatus for high vacuum groundwater extraction Disclosed is a process and apparatus in which vacuum extraction is used to remove soil contaminants in both the saturated and vadose zones. One embodiment of the present invention is directed to a process for removing contaminants from a contaminated area... | 10/25/1994 |
| 5356240 | Soil gas and moisture removal A system for removing soil gases, including radon, and moisture from the proximity of building foundations is disclosed. In one embodiment, a network of grooves is scored in the top surface of a cement slab foundation. Tubing with filtered openings for th... | 10/18/1994 |
| 5332333 | Vacuum extraction method and apparatus for removing volatile contaminants from the vadose layer of contaminated earth Volatile contaminants are removed from the vadose zone of contaminated earth by vacuum extraction through a borehole placed into the contaminated area. Means are provided for substantially trapping water within the extraction borehole so as to prevent con... | 07/26/1994 |
| 5265978 | Method for in situ cleaning of contaminated soil An in situ, on-the-ground method of cleaning contaminated soil comprises breaking and piling up contaminated soil, placing the broken soil in a substantially enclosed on-the-ground system and circulating air under pressure to promote an increase in temper... | 11/30/1993 |
