Case Study 3 :    Case Study - 3    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.