For emergency deployment, these multi-stage berms with patented interior walls create wash down zones that safely capture and contain contaminated solutions. Select from two-, three-, or four-zone models. Watertight, lightweight EnGuardI, modified PVC coated fabric provides wide range of chemical resistance. The 8-inch (203-mm) walls allow for easy entry and exit of the compartments. One -in GHT drain fitting per zone. Order optional grates to keep personnel above liquid.