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H Ween oru ' Inc, <br /> Day tanks kw Used Oil are drained daily and no Used mil is allowed to remain in <br /> the stay tanks. Transfer o� Used tail from the days tanks into The Used Oil tank is <br /> done throWh pneumatic: transfer. The ball valve for the Used Oil day tank is <br /> dosed and only opened when attached to the transfer hose allowing :all of the <br /> Used 09 in the day tank to be transferred into the Used Coil tank. <br /> Figure 2 Used Oat Tr,asier° Tank <br />