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expected that the activity presented in this application will increase any sediment, trace elements, <br />~~ dissolved solids or other water quality pazameter in any way for the River. Most runoff on the active <br />site will seep into the gravel piles located throughout the disturbed azea. The final plan incorporates <br />the reclamation of the site, which will have better revegetation on all azeas disturbed. <br />The only principal way that the gravel pit could affect the water quality of the River is through fuel <br />leakage from a ruptured tank. As described in the mining plan, the fuel tanks aze fully contained in <br />secondary containment berms which will be sized to hold all the volume from every tank if it mptured <br />inside the structure, using an impermeable liner. <br />4. Surface Water Handling in the Permit Area <br />As described in the mine plan, the combination of earth or gravel berms along the east side of <br />Highway 9 combined with an elaborate system of sediment collection ditches and ponds will contain <br />~ the mnoff from the 100 year 24 hour event on site. A system of 4 ponds is located in the lower <br />southwest comer of the permit area to provide fot pit water seepage back into the ground as well as <br />capacity to withhold the 100 year runoff. All downstream users are fully protected. A National <br />Pollution Elimination Discharge Permit (NPDES) is not required since there will be no discharge <br />from the site. If water pumping from the pit is greater than the seep capacity of the pond system, the <br />gold operation will have to stop pumping until either the pond system can be expanded or a NPDES <br />permit is obtained. <br />Both the gold and gravel processing plants will have a series of detention ponds to trap sediment from <br />the fine slurry dischazge. These ponds will be cleaned as frequently as needed and atl silt will be <br />stockpiled as substitute soil. <br />• <br />Alma Placer 7/03 57 <br />