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from the prevailing northwest winds. Should any wind erosion of tailings be visible, an <br />inexpensive and effect method of control would be to apply on layer of burlap cloth held in place <br />by a 3" open square plastic "bird netting" cloth to the affected areas. <br />Dust control of the roads is not expected to be a problem. Truck traffic at maximum mill <br />capacity is expected to involve only six loads hauled in tandem-axle trucks per day. <br />ORE STOCKPILES <br />Ore stockpiles will be maintained in the following manner to negate acid mine drainage from <br />weather. These are temporary measures to significantly reduce water infiltration into the <br />stockpiles during storage. The visqueen covered stockpile storage will be kept to a minimum in <br />terms of quantity or time, while providing adequate measures to prevent release of contaminants. <br />• Reinforced visquene sheeting, approximately 20ft x 100ft sheets, will be placed over the <br />piles, edges folded and pinned, and held in place by tires, blocks, rocks and/or metal <br />concrete forms. The visquene significantly reduces water infiltration into the stockpiles, <br />minimizing acid mine drainage potential. The water runoff from the visquene is passed <br />through a combination of erosion and sediment control measures including natural minor <br />depressions, constructed berms, silt fence and vegetative filters. <br />• Temporary storage of the existing material; no additional material added to the piles; only <br />minimal disturbances to the existing piles for maintenance. <br />• Ongoing maintenance and replacement as needed of the visquene material. <br />• Perform. SPLP analysis, as outlined in the Division's August 27, 2009 letter, of a <br />representative sample(s) from the stockpiles prior to removal and milling or disposal of <br />the material. <br />M1990-057 November 25, 2009