In many situations, controlling water infiltration from inside the structure is not an option.nbsp These concrete waste tanks were allowing groundwater to enter, creating a substantial expense for the treatment plant.nbsp The solution was to curtain grout the exterior walls of the structures with polyurethane.nbsp Curtain grouting consists of using injection lances to penetrate the soil in order to get the grout to the desired depth. nbspHyperflex, the polyurethane grout used, is NSF approved and reacts foams with the presence of moisture.nbsp Hyperflex will migrate into the fractures of the structure to seal off the infiltration in addition to creating a foam barrier. nbsp32,000 gallons per day of freshwater was saved from being treated with sewage on this job.nbsp
