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• <br />March 2000 <br />-10- <br />993-2099.150 <br />- Typical Solution Application Rate approximately 0.0045 <br /> gpm/fiz <br />- Average Leach Area 1.5 million square feet <br />- As Delivered Ore Moisture Content 5.6 percent (average <br /> 1998 and 1999) <br />- Field Capacity Ore Moisture Content 7.5 percent (average) <br />- Phase I PSSA Typical Operating Head 30 feet <br />- Phase II PSSA Typical Operating Head 20 feet <br />- Phase IV PSSA Typical Operating Head 20 feet <br />- Draindown Period 12 hours <br />- Precipitation Fluctuations 95 percent confidence limit <br />- Storm Event 100-year, 24-hour <br />• <br />• <br />- Minimum Phase H and IV <br />PSSA Freeboard 5 feet <br />- Minimum Phase I PSSA Freeboard 3 feet <br />- Phase I Area (plan area) 4.6 million square feet <br />- Phase II/III Area (plan area) 5.2 million square feet <br />- Phase IV Area (plan area) 6.7 million square feet <br />(7.8 million square feet - <br />surface area corrected for <br />slope) <br />Phase IV PSSA Liner System (see Section 4.6) <br />- Soil Liner Fill 12 inches minimum <br />(10-6 cm/sec) <br />1:\HV~1099\FINAL REPORT3099MAIN3.~OC Golder Associates <br />