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| Number | Title | Issue Date |
| 7347646 | Geotechnical barrier A geotechnical barrier includes a first barrier layer; a second barrier layer overlying the first barrier layer and spaced therefrom, the first and second barrier layers defining, at least in part, a fluid passageway having an inlet and an outlet; and fluid displace... | 03/25/2008 |
| 7311467 | Ergonomic size leaching chamber A leaching chamber, particularly a chamber which lacks ribs and is therefore flexible along its length, has a length in the range 4 to 5 ft, a length to width aspect ratio of between 1.2 and 1.6 and a weight of less than 3 pounds per foot, preferably about 12 pounds... | 12/25/2007 |
| 7309189 | Fluid distribution and collection in landfills and contaminated sites A fluid injection and removal system to inject or remove fluids from a landfill or contaminated area. The system allows for treatment of waste in the landfill or the contaminated area. The fluid injection and removal system includes a permeable layer and at least on... | 12/18/2007 |
| 7198433 | Landfill design and method for improved landfill gas capture The invention provides an improved method of collecting biogas from a landfill that results in more complete collection of biogas produced in the landfill, and with less contamination with air. The method involves providing the landfill with an upper gas containment... | 04/03/2007 |
| 7168888 | Aerobic and anaerobic waste management systems and methods for landfills The invention provides systems and methods for creating, managing and staging aerobic and/or anaerobic landfills. The invention provides systems and methods for collecting liquids from and recirculating liquids into landfills and systems and methods for collecting g... | 01/30/2007 |
| 7111580 | Device for detecting the presence of a chemical contaminant The disclosure relates to a device for detecting the presence of a chemical contaminant. The device comprising a resilient indicator element which is biased into a first position and is anchored in the first position by means of a failure element. The failure elemen... | 09/26/2006 |
| 7101481 | System for the production of biogas and compost from organic materials and method of operating an organic treatment facility A system and method for continuous decomposition of organic material to produce biogas and compost in which successive reactor zones in a primary reactor are used in turn to receive organic material which is decomposed in situ anaerobically followed by aerobic decom... | 09/05/2006 |
| 7083358 | Aquatic weed suppressor A sub surface aquatic weed barrier consisting of a strip of plastic held to the aquatic substrate by transverse weights bonded to the plastic strip. Gas release ports are located in the plastic sheet, positioned midway between the transverse weights. ... | 08/01/2006 |
| 7077602 | Method and system for containment, such as a containment cap for solid waste constructed of modified asphalt The present invention is directed to a waste or environmental containment system that includes modified asphalt specifically designed for containment, and a system of installation that provides a seamless cap over the area to be contained. The modified asphalt of th... | 07/18/2006 |
| 6976809 | Method of preventing frost heave stress concentrations in chilled buried pipelines A method for maintaining a stable soil by surrounding a chilled gas pipe with a material that has an antifreeze component that prevents the soil from freezing. By keeping the soil from freezing, it remains stable at all times. The method calls for excavating a trenc... | 12/20/2005 |
| 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 |
| 6939081 | Fuel dispensing and containment assembly A modular fuel dispensing and containment assembly for storing fuel in at least one fuel tank and for pumping the fuel to a group of fuel dispensers. The assembly has a reinforced concrete vault located underground which contains a fuel tank within its interior. The... | 09/06/2005 |
| 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 |
| 6881010 | Systems for on site treatment and disposal of contaminated soils and sediments A system for the onsite storage, treatment and disposal of contaminated soils and sediments includes a trench that is excavated at the site. The trench is formed with a bottom surface that includes a sump reservoir and a sloped portion oriented to feed liquids into ... | 04/19/2005 |
| 6719489 | Selective suspension drain closure apparatus and method of controlling flow of liquid An apparatus for controlling a flow of a liquid into a sewer drain comprising a catch basin having a catch basin drain coupled with the sewer drain. In addition, a housing element that is positioned within the catch basin, whereby the housing element is coupled with... | 04/13/2004 |
| 6599058 | Landfill leachate collection apparatus A landfill (10) having a leachate collection apparatus including a layer of geonet material (40) disposed above a liner (38) as its primary leachate flow path. Leachate flows along the geonet material to a collection trench (16) located along an edge (14)... | 07/29/2003 |
| 6575663 | Advanced containment system A containment system to isolate waste in the ground including parallel interlocking tubes.... | 06/10/2003 |
| 6558077 | Selective suspension drain closure apparatus An apparatus for controlling a flow of a liquid into a sewer drain comprising a catch basin having a catch basin drain coupled with the sewer drain. In addition, a housing element that is positioned within the catch basin, whereby the housing element is c... | 05/06/2003 |
| 6497533 | Drainage system with membrane cover and method for covering wastewater reservoir A membrane cover is mounted at the surface of a wastewater reservoir. The membrane cover has a flexible buoyant impermeable membrane affixed to the perimeter walls of the reservoir and loosely laid over the wastewater level inside the reservoir. An array ... | 12/24/2002 |
| 6431793 | Containment system for spills A spill containment system for storage tanks, flow devices, and the like, and a containment system for spilled light non-aqueous phase liquid are provided. The spill containment system comprises a liner for receiving and containing liquid that spills, as ... | 08/13/2002 |
| 6428239 | Vadose zone for a leaching field A vadose zone for a leaching field which enables the construction of a leaching field in terrain where conventional leaching fields cannot be constructed. Such terrain also comprise areas where a high water table exists or where percolation tests fail. Th... | 08/06/2002 |
| 6364572 | Aerobic landfill bioreactor The present invention includes a system of decomposing municipal solid waste (MSW) within a landfill by converting the landfill to aerobic degradation in the following manner: (1) injecting air via the landfill leachate collection system (2) injecting air... | 04/02/2002 |
| 6357964 | Drainage system with membrane cover and method for covering wastewater reservoir A membrane cover is mounted at the surface of a wastewater reservoir. The membrane cover has a flexible buoyant impermeable membrane affixed to the perimeter walls of the reservoir and loosely laid over the wastewater level inside the reservoir. An array ... | 03/19/2002 |
| 6283676 | Sequential aerobic/anaerobic solid waste landfill operation Landfills including multiple lifts having horizontal piping layers and methods for their use to accelerate anaerobic and/or aerobic degradation of municipal solid waste to increase landfill capacity.... | 09/04/2001 |
| 6116815 | Process for preventing release of contamination from an underground storage tank field A system for preventing release from an underground storage tank from further migrating into surrounding geological formations and groundwater of a surrounding underground storage tank field includes a low permeable layer surrounding the tank field and a ... | 09/12/2000 |
| 5924821 | Apparatus and method for gas and/or liquid exchange between an area outside and an area inside a bulk material pile Gas and/or liquid exchange between an area within a bulk material pile and an area outside the bulk material pile is enabled by establishing a conduit, e.g., a pipe, between the area outside the bulk material pile and the area within the bulk material pil... | 07/20/1999 |
| 5735639 | Modular mobile safety structure for containment and handling of hazardous materials A mobile safety structure for the storing and handling of containers of hrdous materials comprising multiple modular storage units. The modular storage units may be configured in tandem to form one embodiment of the modular mobile safety structure. In th... | 04/07/1998 |
| 5511908 | Mobile safety structure for containment and handling of hazardous materials A mobile safety structure for the storing and handling of containers of hrdous materials which comprises a secondary containment feature in the form of a base assembly having a containment pan. The base assembly also provides a framework for supporting a... | 04/30/1996 |
| 5498825 | Plutonium and nuclear toxic waste storage depot and method A method of removing radioactivity from the interior of a building by transporting radioactive material within a slurry, precipitating out or otherwise filtering out the then contaminated material outside the building, thus removing it in a continuous flu... | 03/12/1996 |
| 5494374 | Secondary containment flexible underground piping system The secondarily contained piping system having two spaced access chambers that are interconnected by a secondary containment pipe to provide a sealed arrangement for a flexible fluid supply pipe, the ends of which are disposed within the access chambers. ... | 02/27/1996 |
| 5419655 | Collection of liquid from below-ground location A method of retrieving liquid from a below-ground collection area by permitting gravity flow of the liquid from the collection area to a first closed container; monitoring the level of the liquid in the closed container; and after the liquid reaches a giv... | 05/30/1995 |
| 5387741 | Method and apparatus for subterranean containment of hazardous waste material Upon completion of dislodging and transporting mine material from an underground mine, the mine is converted to a repository for the disposal of hazardous waste. The mine includes a network of connected chambers each formed by surrounding sidewalls into w... | 02/07/1995 |
| 5375944 | Waste disposing ground or facility A waste disposing ground or facility includes a space in the form of a cavity for receiving waste therein. A planar structure covers the entire overall upper opening of the cavity. The planar structure is constructed in advance of starting disposal of was... | 12/27/1994 |
| 5372453 | Fuel spill containment device A fuel spill containment system for use with an underground fuel tank has two upstanding fill tubes extending upwardly from the tank through the bottom wall of a spill container. Each tube has an adjustable sealed connection with the container bottom wall... | 12/13/1994 |
| 5333641 | Containment vessel for environmentally sealing a chemical compound A chemical containment vessel provides an environmental seal around a bottle containing hazardous chemicals for use in manufacturing processes. An enclosure vessel is made of upper and lower assemblies connected together to form a cavity for housing the b... | 08/02/1994 |
| 5332335 | Secondary containment system A method for fabricating a secondary containment system in place includes providing a support surface for bottom and side portions of the secondary containment systems and applying a thermoset resin material to the support surface.... | 07/26/1994 |
| 5325642 | Geodesic hazardous waste containment building A Geodesic Hazardous Waste Containment Building provides a means for the long term isolation of toxic waste from the environment. The invention comprises a primary containment sphere, a surrounding secondary containment sphere and a means for protecting t... | 07/05/1994 |
| 5257652 | Fluid collection system for installation underground and method of installation Fluid collection system for installation underground includes a first housing having a top, a wall extending downwardly from the top, and a first pipe-receiving opening in the wall at a predetermined vertical distance from the top. There is a second housi... | 11/02/1993 |
| 5244307 | Anti-pollution piping and dispensing system A system of above grade piping for distributing product from underground storage tanks to dispensers, plus a means to contain and capture surface spills and direct same into an oil-water separator that is built into and is part of the underground storage ... | 09/14/1993 |
| 5141260 | Force-transferring double-containment plastic pipe assembly A double-containment thermoplastic pipe assembly provides for transfer of differential thermal expansion forces to rigid external supports. The assembly includes a flanged restraint coupling having an inner carrier pipe portion, an outer containment pipe ... | 08/25/1992 |
