Abstract: An improved method and apparatus for waterproofing soil utilizing a flexible plastic sheet for providing a water barrier provides a system for readily detecting the presence of holes in the plastic material. The sheet includes a plastic layer which may be rendered electrically conductive by embedding conductive particles within it. The integrity of the sheet may then be monitored by establishing an electric field across the sheet and monitoring for sparks between the conductive plastic layer and a probe. Reliable and economical testing is possible, even in situation where electrical leak testing was not previously feasible.

Abstract: A plastic liner pipe penetration adapter designed for sealably penetrating a moisture impervious thermoplastic sheet or liner, particularly suitable for lining reservoirs, hazardous waste disposal sites, outdoor fluid containment areas and other similar applications, without damaging the sealing characteristics of the liner and which also allows field testing of the sealability of the liner after the installation of the adapter. In one embodiment, an inner tubular housing member defining a passage through the liner is inserted through a plate and connected thereto. An outer tubular housing member is coaxially aligned about the inner tubular housing member and sealably welded at a first end to the plate. An annular end piece is inserted over the inner tubular housing member in order to seal a second end of the outer tubular housing member to the inner tubular housing member, thereby creating a pressure test chamber between the tubular housing members and the annular end piece.

Abstract: An improved method and a product for waterproofing soil utilizing a flexible plastic sheet for providing a water barrier and for providing a means of reflecting light sufficient to prevent damage to the sheet and the underlying soil from direct sunlight comprising a uniform density or multiple-density plastic sheet material which has been manufactured to a desired thickness to contain an upper surface cpable of reflecting light.