What is a “SUMP” or Secondary Containment in a Building?
The definition of a sump (noun) is a pit or reservoir serving as a drain or receptacle for liquids; a pit at the lowest point in a circulating drainage system. Basically, what the risk management industry calls a sump in the case of a chemical storage building is a 6-7 deep well in the bottom of the prefabricated steel building which is continuously welded to be leak-proof. This sump is then covered by a steel or fiberglass floor grating and is often equipped with a sump liner of a plastic nature to catch accidental spills.
