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6 <br />5 <br />4 <br />Figure 7. Logan Wash Mine Evaporation Pond Leak Detection Vault Water Levels <br />Water level rising, pumping <br />& subsequent float switch <br />malfunction <br />Vault taking on & pumping <br />s I water <br />a <br />o Water level quasi -static <br />� I <br />0"4 <br />Water level rising due to pump battery failure <br />Vault Pumped <br />out; replaced <br />existing pump <br />Vault_takin&on_& <br />pumping water <br />•. .. 1 . . 0L.. <br />Intermittent Pumping <br />Vault manually pumped <br />/ out <br />Heads during download <br />t,yy3\h�tih\h�ti(0\h�ti(0\����\��tiy\a�ti�\��ti� <br />Date <br />