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Containment Area

There is a company having problems with cracking on the floor of their cement containment area.  There are two large (50,000 gallon) holding vessels in this containment area which feed wastewater to a treatment system.  Occasionally there with be a overflow from these tanks which is captured in the containment area and pumped back into the system but there has been some leakage on occasion, potentially from the cracks.  The facility repairs the cracks but they continue to appear.  The company is currrently looking at a membrane to cover the surface of the containment area but fear this too may crack.  Does anyone have information on techniques to resolve containment problems like this?

John Burke