Leak containment system for underground storage tanks
OwnerDelmar D. Longinventor
Life of this patent
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Abstract
A double-walled leak containment system for an underground storage tank is provided. The underground storage tank is surrounded, in order, by an inner polymeric containment layer, a liquid transmissive textile, and an outer polymeric containment layer. The outer polymeric containment layer is advantageously formed by spray coating the textile.
Claims4
A leak containment system of improved tensile, impact and abrasion strength, said system comprising a storage tank surrounded by a liquid transmissive geotextile which is a fabric, further encased by a stretchable, conformable fabric, said stretchable, conformable fabric being coated with, and partially impregnated by in the range of about 40 to 70% of its depth, an elastomer which is a polyurethane useful for preparing a fuel-resistant, hydrolysis-resistant containment layer, said elastomer forming an outer polymeric containment layer, said outer layer partially impregnating said stretchable, conformable fabric to form a composite at the interface of said stretchable, conformable fabric and said outer containment layer;
- and an inner polymeric containment layer disposed between said liquid transmissive geotextile and said storage tank, said inner polymeric containment layer being in direct contact with said geotextile;
- wherein an unimpregnated portion of said stretchable, conformable fabric retains its fluid transmissive character.
Dependencies are inferred from the claim text.