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back to the Dugout Pond, within a maximum time frame of 72 hours, thus meeting a <br />• reasonable evacuation time period for Sediment Pond 2 dewatering. In this manner, <br />CEC can maintain a continued lowered pond level in Sediment Pond 2 during <br />prolonged periods of excess rainfall and runoff at the site (similar to that which was <br />experienced during the Spring of 1995). CEC did have occasion to follow this plan <br />during a rainfall event in late April and early May 1999. The system functioned as <br />designed. <br />Except for surface water accumulation from "recent" rainfall events, the practice of <br />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 (as much as <br />thirty feet thick) exist across the remainder of the mine site. The sand's high <br />infiltration characteristic contributes to a significant loss of surface moisture, due to <br />the "deep percolation" of rainfall during most storm events. The result is that <br />normally only minimal runoff is experienced. <br />u <br />I • <br />AHR-2002 -8 0- <br />