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• back to the Dugout Pond, within a maximum time frame of 72 hours, thus meeting <br />a reasonable evacuation time period for Sediment Pond 2 dewatering. In this <br />manner, CEC can maintain a continued lowered pond level in Sediment Pond 2 <br />during prolonged periods of excess rainfall and runoff at the site (similar to that <br />which was experienced during the Spring of 1995). CEC did have occasion to <br />follow this plan during a rainfall event in late April and early May, 1999. The <br />system functioned as designed. <br />Except for surface water accumulation fi om "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 /> <br />• <br />AHR-2001 -a 9- <br />