A layered material configured for assembly of a base mat containment system is provided. The layered material includes: a first layer affixed to a barrier layer, a second layer affixed to the barrier layer, the second layer including a plurality of peaks and valleys. The base mat includes a high-strength material. A method of fabrication and a base mat containment system are disclosed.

The invention relates to a low-permeability geotechnical barrier material including a blend of approximately equal parts of: aggregate particles, sand-size particles and manufactured composite particles that include a hydratable sealant material composed of naturally-occurring clay minerals and/or polymer-enhanced clay minerals, such that the actual percentage of clay mineral component is less than 10% by weight in the blended material. In a particular embodiment, the construction of a low-permeability geotechnical barrier using predominantly coarse grain materials by conventional compaction efforts is rarely attempted due to the difficulty of maintaining a uniform mix of well-graded sand and aggregate blends necessary to achieve low permeability. The regularly achievable permeability offered by this material blend when installed with specific proscribed techniques using conventional equipment can be 510.sup.8 cm/sec or lower.

A method for installing an in situ, low-permeability temporary horizontal barrier at depth for vertical containment of a soil mass including installing a low permeability vertical barrier having walls located to contain a predetermined soil volume, the vertical barrier having a horizontal surface area in a plane perpendicular to its walls; and injecting low permeability reagents capable of forming a temporary horizontal barrier in a pattern suitable for creating a horizontal subsurface barrier joined to all of the vertical barrier walls to form an in situ barrier.

A method of permeating and infusing a formation around the borehole with wax by heating a formation surrounding a borehole and pumping molten wax into the formation, wherein the molten wax flows into and fills voids the formation without disrupting the formation is described. Also, a method of permeating and infusing a formation around the borehole with wax by heating a formation surrounding a borehole, pumping molten wax into the borehole, heating and circulating the molten wax vertically within the borehole for an extended period using a heater and pump attached to a circulation pipe extended to the bottom of a zone of the borehole to be heated, and recovering molten wax from the borehole by displacing it back to the surface with another material of different density is described. Additionally, a method of forming subterranean barriers by drilling multiple closely-spaced boreholes along a subterranean boundary, treating the boreholes with infusions of molten wax, and forming a hydraulic barrier along said boundary is described.

Disclosed is a waterproofing membrane that comprises a carrier sheet, a pressure sensitive adhesive layer on one surface of the carrier sheet, and a protective coating layer on the adhesive layer. The protective coating layer comprises polyvinyl acetate (PVAc). The protective coating layer protects the membrane against weather exposure, tolerates foot traffic and strongly adheres to concrete cast against it.

The present invention provides a method of making soil substantially impermeable to a chemical compound or composition that may pollute groundwater, comprising applying a polyurethane resin to the soil, wherein said polyurethane resin is adapted to incorporate soil particles into a matrix as it penetrates the soil to make the soil substantially impermeable to said chemical compound or composition. It also relates to a method of containing a chemical compound or composition that may pollute groundwater within a containment structure that has a base formed from soil, a method of forming or repairing such a structure and to containment structures that surround a storage facility for storing a chemical compound or composition.

A liquid resistant containment membrane and which is durable enough to remain in place during the drilling and fracking phases to eliminate the delay and cost of replacement or can be relocated from site to site, has a slip resistant top surface, is a flexible membrane, and/or which top portion of the containment membrane does not absorb liquids. The containment membrane comprises a polymer waterproof layer and a reinforcement layer. The reinforcement layer is connected to a bottom side of the polymer waterproof layer.

A reinforced wall system comprising fill material, a plurality of facing baskets, a plurality of reinforcing members at least partially disposed within the fill material, and an impermeable membrane at least partially encapsulating at least a portion of the fill material and one or more of the reinforcing members. Each of the plurality of reinforcing members is associated with a corresponding facing basket. An outer end of each reinforcing member is above a substantially horizontal portion of the corresponding facing basket. The facing baskets and the reinforcing members are positioned in a plurality of layers, with each layer comprising one facing basket and one corresponding reinforcing member. The impermeable membrane is positioned to span two or more layers of the plurality of layers. At one or more layers of the plurality of layers, a portion of the impermeable membrane is positioned around an outer end of the corresponding reinforcing member.

A liquid resistant containment membrane and which is durable enough to remain in place during the drilling and fracking phases to eliminate the delay and cost of replacement or can be relocated from site to site, has a slip resistant top surface, is a flexible membrane, and/or which top portion of the containment membrane does not absorb liquids. The containment membrane comprises a polymer waterproof layer and a reinforcement layer. The reinforcement layer is connected to a bottom side of the polymer waterproof layer.

A system for assisting in preventing the leakage of liquid from an outdoor work-site and allowing vehicle ingress onto and egress off of the work-site includes a plurality of berm members configured to be positioned at least partially around the perimeter of a support surface and extend upwardly relative thereto. At least one berm member comprises a drive-over barrier.