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January 1995). Pumps can be employed, as needed, to move the accumulated <br />runoff water in Sediment Pond 2 back to the Dugout Pond within a maximum time <br />frame of 72 hours, thus meeting a reasonable evacuation time period for Sediment <br />Pond 2 dewatering. In this manner, CEC can maintain a continued lowered pond <br />level in Sediment Pond 2 during prolonged periods of excess rainfall and runoff at <br />the site (similar to that which was experienced during the spring of 1995). CEC did <br />have occasion to employ this plan during rainfall events in April and May, 1999. <br />The system functioned in accordance with the design. <br />Except for the surface water accumulation from "recent" rainfall events, the practice <br />of encouraging standing water to "pond" in the former mining pits (now confined to <br />ash disposal B -Pit) has been eliminated. Deep eolian sand deposits (in some places <br />as much as thirty feet in thickness) exist across much of the mine site. The sand's <br />high infiltration characteristic contributes to a significant loss of surface moisture <br />due to the "deep percolation" of rainfall during most storm events. The result is <br />that normally only a minimal runoff is experienced. As additional segments of the <br />Permit site are reclaimed (topsanded and seeded), less and less runoff has been <br />observed. <br />AHR -2012 -75- <br />