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Figure 7. Logan Wash Mine Evaporation Pond Leak Detection Vault Water Levels <br /> 6 - - <br /> 5 Water level rising, pumping <br /> &subsequent float switch <br /> malfunction Water level rising due to pump battery failure <br /> 4 <br /> 3 _ <br /> $ Vault taking on &pumping Vault Pumped <br /> .. water 11 out; replaced <br /> \ existing pump ' <br /> Water level quasi-static y <br /> z Vault takingon &_ ' <br /> _. <br /> pumping water Intermittent Pumping <br /> e � • <br /> F <br /> 66 <br /> ■ • . . . <br /> Vault manually pumped <br /> out <br /> 1 Heads during download <br /> Date <br />