Secondary containment systems especially well suited for hydrocarbon storage and delivery systems

Abstract From the Canadian patent

A secondary containment system which may be manufactured in a factory, shipped and installed in a reasonably low cost and fully usable manner. In one embodiment, a large membrane of material completely lines, a collection and containment pit along with radiating trenches which drain into the collection pit. There is a substantial amount of membrane bulk which enables it to bunch in the corners and to provide slack which conforms to irregularities on the earthen walls and floor of the pit. Thus, localized stresses do not occur at places where the membrane bridges protections formed on the walls, in the corners, or the like. In another embodiment, the membrane covers a tank in the pit and …