Secondary containment systems especially well suited for hydrocarbon storage and delivery systems
A secondary containment system is described comprising a sheet of membrane material which is large enough to line at least a portion of a collection and containment pit along with trenches radiating. The trenches are graded to drain into the pit where a substantial amount of membrane bulk enables it to bunch in at least an area of the pit and to provide sufficient slack to conform to irregularities on the walls and floor of the lined portion of the pit and trenches. Localized stresses do not occur at places where the membrane bridges projections form by the irregularities, corners, or the like, anchoring means independent of the membrane and surrounding at least part of the perimeter of the pit. Means for attaching the anchoring means to the membrane to secure it provides a shoring for walls of the pit by restraining movement of the membrane if there should be a cave-in of the pit for a period of time which is at least long enough for workers to escape if there should be a cave-in. Means for closing and joining at least some sections of the membranes to preserve the integrity of a seal formed in order to form a secondary containment enclosure.
- Assignee:
- MPC Containment Systems, Ltd., Chicago, IL
- Patent Number(s):
- US 4682911
- OSTI ID:
- 6183538
- Resource Relation:
- Patent File Date: Filed date 8 Mar 1985
- Country of Publication:
- United States
- Language:
- English
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