Abstract: A shallow gas well for use at landfills having a gas-producing waste pile includes a lower geocomposite positioned over the gas-producing waste pile and a protective layer of soil positioned over the lower geocomposite. An upper geocomposite is positioned over the protective layer of soil such that the protective layer of soil is positioned between the lower and upper geocomposites. An impermeable geomembrane is positioned over the upper geocomposite and a shallow gas well collector is positioned within the protective layer of soil.

Abstract: A fail-safe gas collection system for collecting waste gas from a waste pile having an impermeable membrane covering substantially all or part of the waste pile. The fail-safe gas collection system includes an anti-lift topping for biasing the membrane to remain in place in the presence of winds. A network of conduits is positioned beneath and extends beneath the membrane. A plurality of collection nodes are positioned at spaced-apart positions on the network of conduits. A negative pressure pump is provided for drawing gas through the collection nodes of the network of conduits. An adjustable control valve is positioned between the network of conduits and the negative pressure pump. At least one pressure relief valve is provided to prevent the membrane from ballooning in the event that the negative pressure pump stops operating for a time.

Abstract: A gas collection grid for use at landfills having a gas-producing waste pile, including a lower geocomposite positioned over the gas-producing waste pile, a protective layer of soil is positioned over the lower geocomposite. An upper geocomposite is positioned over the protective layer of soil such that the protective layer of soil is positioned between the lower and upper geocomposites. An impermeable geomembrane is positioned over the upper geocomposite. A cruciform gas collector conduit grid is positioned within or atop the protective layer of soil and has a plurality of collection orifices formed adjacent the vertical openings formed in the protective layer of soil. The impermeable geomembrane is non-perforated adjacent the collection orifices and the cruciform gas collector conduit grid is adapted for delivering collected gas laterally from beneath the geomembrane rather than vertically through the geomembrane.

Abstract: A cover system for preventing water ingress having a geomembrane layer and a wind-disturbing open-pore layer thereon and defining an asperity extent, said open-pore layer for forming in situ an air-flow turbulence zone between the geomembrane layer and a boundary space proximate the open-pore layer as a transition from turbulent flow of wind in the turbulence zone to laminar flow of the wind remote from the geomembrane layer, said open-pore layer inducing disturbance of a wind flow into and through the layer, whereby a suction force on the geomembrane is disturbingly broken by turbulent wind shear events therein and exerted downward pressure deflections, wherein the wind speed and pressure differential lessen and the geomembrane resists uplift. A method of covering a large area surface with a cover system that resists wind uplift is disclosed.

Abstract: A turf joining system including a first piece and second piece of a synthetic turf and a bridge support. The first and second pieces have side edges which are closely adjacent each other. The bridge support heat welds to the overlying first and second pieces to form an elongated first heat weld and elongated second heat weld each proximate and spaced from the respective side edge to define a water channel therebetween. A method of sealing a plurality of synthetic turf pieces together is disclosed.

Abstract: A tufted geotextile for covering a land surface, comprising a porous backing sheet densely tufted to provide simulated grass blades having interstices therebetween on a tuft gauge of about 20 tufts per foot to about 50 tufts per foot and the adjacent lines spaced about ¼ inch, the interstices for receiving an infill from the backing sheet to a fill plane to increase shading of the interstices by the tuft blades on the backing sheet while resisting hydraulic displacement and movement of the infill while overlying the ground surface for covering purposes. A closure system is disclosed using the tufted geotextile as a component overlying an impermeable geomembrane for resisting inflow of water below the ground surface.

Abstract: A tufted geotextile includes a backing sheet tufted to resemble grass with polymeric yarns that when tufted form loops or bridges on a back side and tufts that extend as grass-like blades from an upper surface. Each line of tuft blades is tufted with a repeating stitching pattern generally of a weft portion along a tuft line first axis and warp portions disposed in a first direction at an angle to the first weft portion. The tufts define interstices that define cells that receive and trap infill for resisting displacement and movement of the infill under loading such as hydraulic flow or granular flow due to wind, seismic, vibrations, expansion and contraction loading, and the like. Each line of tuft blades is sewn along an alternating, interconnected “C-shaped” stitching pattern or square wave stitching pattern to define diverting tufts to restrict infill displacement and water flow.

Abstract: An elongated polymeric impermeable geomembrane sheet having opposing first and second surfaces with a plurality of spaced-apart first projections extending from the first surface, said first projections each tapering to a pointed apex at a distal extent, which first projections for mechanically engaging a synthetic drainage geomesh sheet overlaid by a tufted geotextile sheet and in contact with adjacent fill materials within the aggregation, whereby the aggregation has increased resistance to shear failure of the aggregation of fill materials and reducing stabilization failures of materials aggregation applications. A ground covering closure system is disclosed.

Abstract: A low-profile fluid collection conduit includes an elongate outer cover having an upper portion and a lower portion generally opposite the upper portion, with the outer cover being much wider than it is tall and defining an interior volume. An elongate rigid spacer is fitted within the interior volume of the elongate outer cover, with the elongate spacer allowing the majority of the interior volume to be unfilled so as to permit the flow of fluid along and within the elongate outer cover. The collection conduit is used with a fluid-impermeable membrane as part of a landfill fluid collection and conveyance system.

Abstract: A low-profile fluid collection conduit includes an elongate outer cover having an upper portion and a lower portion generally opposite the upper portion, with the outer cover being much wider than it is tall and defining an interior volume. An elongate rigid spacer is fitted within the interior volume of the elongate outer cover, with the elongate spacer allowing the majority of the interior volume to be unfilled so as to permit the flow of fluid along and within the elongate outer cover. The collection conduit is used with a fluid-impermeable membrane as part of a landfill fluid collection and conveyance system.

Abstract: A low-profile fluid collection conduit includes an elongate outer cover having an upper portion and a lower portion generally opposite the upper portion, with the outer cover being much wider than it is tall and defining an interior volume. An elongate rigid spacer is fitted within the interior volume of the elongate outer cover, with the elongate spacer allowing the majority of the interior volume to be unfilled so as to permit the flow of fluid along and within the elongate outer cover. The collection conduit is used with a fluid-impermeable membrane as part of a landfill fluid collection and conveyance system.

Abstract: A low-profile fluid collection conduit includes an elongate outer cover having an upper portion and a lower portion generally opposite the upper portion, with the outer cover being much wider than it is tall and defining an interior volume. An elongate rigid spacer is fitted within the interior volume of the elongate outer cover, with the elongate spacer allowing the majority of the interior volume to be unfilled so as to permit the flow of fluid along and within the elongate outer cover. The collection conduit is used with a fluid-impermeable membrane as part of a landfill fluid collection and conveyance system.

Abstract: A gas vent for a landfill includes a sub-surface gas collection manifold for collecting sub-surface gas from beneath a geomembrane. Preferably, the collection manifold includes a plenum for receiving sub-surface gas. A conduit is connected to and extends upwardly from the plenum, with the conduit communicating with the interior volume of the plenum and having an upper discharge end. The conduit is adapted and provided for communicating sub-surface gas from within the interior volume of the plenum through the geomembrane. An activated charcoal filter disposed adjacent the discharge outlet of the hood removes odors from the gas as it is discharged from the discharge outlet.

Abstract: A low-profile fluid collection conduit includes an elongate outer cover having an upper portion and a lower portion generally opposite the upper portion, with the outer cover being much wider than it is tall and defining an interior volume. An elongate rigid spacer is fitted within the interior volume of the elongate outer cover, with the elongate spacer allowing the majority of the interior volume to be unfilled so as to permit the flow of fluid along and within the elongate outer cover. The collection conduit is used with a fluid-impermeable membrane as part of a landfill fluid collection and conveyance system.

Abstract: A tufted geotextile for covering a land surface, comprising a porous backing sheet densely tufted to provide simulated grass blades having interstices therebetween on a tuft gauge of about 20 tufts per foot to about 50 tufts per foot and the adjacent lines spaced about ¼ inch, the interstices for receiving an infill from the backing sheet to a fill plane to increase shading of the interstices by the tuft blades on the backing sheet while resisting hydraulic displacement and movement of the infill while overlying the ground surface for covering purposes. A closure system is disclosed using the tufted geotextile as a component overlying an impermeable geomembrane for resisting inflow of water below the ground surface.

Abstract: A tree stand (10) is disclosed having a top or seating portion (11) and a bottom or standing portion (12). The top portion includes cable attachment arms (13) mounted to a cantilever frame (16). The cable attachment arms are coupled to a flexible cable (14). The top portion also includes a gimbal or pivot (22) mounted distally the tree engagement portion (19) and a hanging chair or seat assembly (23) coupled to the pivot. The hanging seat assembly includes a quick connect coupler (25), a length of chain, cable, tether, rope, or the like (26) coupled at one end to the coupler, and a chair suspending frame (27) coupled to the opposite end of the chain (28).

Abstract: A low-profile fluid collection conduit includes an elongate outer cover having an upper portion and a lower portion generally opposite the upper portion, with the outer cover being much wider than it is tall and defining an interior volume. An elongate rigid spacer is fitted within the interior volume of the elongate outer cover, with the elongate spacer allowing the majority of the interior volume to be unfilled so as to permit the flow of fluid along and within the elongate outer cover. The collection conduit is used with a fluid-impermeable membrane as part of a landfill fluid collection and conveyance system.

Abstract: A gas vent for a landfill includes a sub-surface gas collection manifold for collecting sub-surface gas from beneath a geomembrane. Preferably, the collection manifold includes a plenum for receiving sub-surface gas. A conduit is connected to and extends upwardly from the plenum, with the conduit communicating with the interior volume of the plenum and having an upper discharge end. The conduit is adapted and provided for communicating sub-surface gas from within the interior volume of the plenum through the geomembrane. A low-pressure relief valve is operative for opening when positive pressure exists within the conduit. The low-pressure relief valve comprises a valve membrane normally resting upon a seat and which is lifted off the seat by low positive pressure.

Abstract: A method for covering a site with synthetic turf includes laying down a first elongate strip of synthetic turf, laying down a second elongate strip of synthetic turf, with the second elongate strip of synthetic turf is laid down substantially adjacent to the first elongate strip of synthetic turf in a manner such that a portion of the second elongate strip partially overlays a portion of the first elongate strip forming a lap joint. The method also includes the step of applying heat and/or pressure to weld the first elongate strip of synthetic turf to the second elongate strip of synthetic turf along the lap joint.

Abstract: A gas vent for a landfill includes a sub-surface gas collection manifold for collecting sub-surface gas from beneath a geomembrane. Preferably, the collection manifold includes a plenum for receiving sub-surface gas. A conduit is connected to and extends upwardly from the plenum, with the conduit communicating with the interior volume of the plenum and having an upper discharge end. The conduit is adapted and provided for communicating sub-surface gas from within the interior volume of the plenum through the geomembrane. A low-pressure relief valve is operative for opening when positive pressure exists within the conduit. The low-pressure relief valve comprises a valve membrane normally resting upon a seat and which is lifted off the seat by low positive pressure.