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Mr. Edgar Hunter 3 November 19, 1992 <br />The operator has indicated in the permit application at different areas the <br />breakdown of the disturbance. However it is difficult to follow and required <br />going back and forth in the permit to determine which was what. Please list <br />the breakdowns in one page as a summary. The Division also requests the <br />operator to provide approximate timetables to describe the mining operation <br />in accordance with Rule 2.1.2f5-1e-. <br />8) After blasting it is stated by the operator that "shot muck in the pattern is <br />loaded and hauled by conventional ore control method." What is a <br />conventional ore control method? <br />91 The surface water Diversion Ditches shown in Drawing D2, which are sized <br />for the 100-year, 24-hour event, should be designed by a registered <br />Professional Engineer and submitted to the Division for approval. The <br />Division also requests the operator to extend the Diversion Ditch on the east <br />side of the leach pad to the toe of the pad. This ditch should be designed to <br />handle the 100-year, 24-hour event. Drawing "D" only shows designs for <br />the west side of the pile. Also the 100-year, 24 hour precipitation (ppt.- <br />event design was based on 3.5 inches of ppt., when the actual 100-year, <br />24-hour ppt. event for the area is 4.5 inches - (refer to NOAH atlas 1973) <br />please provide the design based on the higher figure. <br />10) What impact will the "ANFO or emulsified ANFO" have on the ground <br />water? <br />11) The Division requests the complete data of the acid base potentials that <br />were analyzed on the 30 samples of the Cresson Project. <br />12) The Division also requests that the operator to submit the designs for all <br />Haul Roads the design should be prepared by a Registered Professional <br />Engineer for approval by the Division. <br />13- The Operator states that "the runoff from the haul road outside the leach <br />(facilities from Aregua Gulch back to the overpass- will be routed off the <br />haul road surface through ditches along the side of the surface. The ditches <br />will he routed to a basin in Aregua Gulch upstream of the road fill. Solids <br />will then be silted out prior to pumping the water out of the basin." <br />a) Where is the water that is pumped going to go? If it is discharged <br />from a point source an NPDES permit is required. <br />b1 Are the sediment traps at the base of the road surface used to route <br />runoff through openings in the safety berms? Is the drainage going to <br />be routed to the natural channel? Would the silt fences or straw <br />bales at the base of each discharge pass compliance of the Storm <br />Water Regulations? <br />