Case Study 4 :        Scott Mizell at Weyerhaeuser Flint River operations (USA) implemented an aggressive contamination control and on - site oil analysis programmed. Four primary sources of contamination were targeted, i.e.: - - New Oil contaminated due to wrong storage and handling practices. - Built in during operations / repairs. - Ingested from environment and - Externally generated. Multiple changes were made including addition of desiccant breathers (dehydrators) on reservoirs and new oil storage tanks. Off-line filtration employed, random cleanliness checks at repair / rebuild shops conducted and sealed small volume containers were used for top-up purpose. At the East word power station, contamination control at an under ground storage facility has really paid off. Historically dirty oil was the cause of frequent suction and failure of hydraulic shuttle valves. In addition to labour, at peak times, repair costs can be as high as $ 200 per month in lost production. Since installing fine filtration and onsite condition monitoring only one failure has occurred. This improvement has saved hundreds of man-hours. In time, it will yield hundreds of thousands of dollars in increased profits to the organizations.