Secondary containment system for manholes and the like
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United States of America Patent
Stats
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Feb 16, 1993
Grant Date -
N/A
app pub date -
Jun 14, 1991
filing date -
Jun 14, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention provides secondary contaiment for liquid carrying equipment which is in a confined area. The invention is especially well suited for retrofitting manholes containing pumps for underground gasoline distribution systems. The pumps or other equipment are removed to expose pipes or wires entering the manhole. Then, plates are bolted around the pipes or wires to engage and support a bag made of a material which resists the attack of the liquid. Holes are cut in the bag to pass the pipes or wires. The bag is placed in the hole, expanded to approximately fill hole, to rest on the plates, and is sealed to the plates, pipes, or wires. The top of the bag is gathered and closed to resist entry of ground water.
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