Post OWS Polish Turbine Oil in Water Bonneville Power House 1 on the Columbia River Customer Portland, Oregon, U.S.A. Location Application Stormwater treatment system for turbine oils and greases that accumulate in the dam base collection system from equipment maintenance wash down activities. Objective of the Treatment Treat high concentrations of oil and grease and discharge less than 10 ppm oil and grease with no visible sheen. Flow Rate: 1,000 GPM Challenge After the successful installation and operation of the stormwater system on the Dalles Lock and Dam, the Portland District US Army Corps of Engineers designed a stormwater treatment system to treat turbine oils and other oils and greases that accumulate in their collection system in the base of the dam at the Bonneville Power H

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