2008-07-11_PERMIT FILE - M2007044 (7)

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ASTM D 698 (standard Proctor). 1. Random Fill: 1. Random Fill shall be placed as needed to achieve the design base grades for the ore pad 2. Condition to a moisture content which allows compaction to the required density without an excessive amount of effort and that results in a stable non- yielding surface. 3. Place Random Fill in 12-inch maximum loose lifts and compact to the density specified below. 4. Soil Random Fill: Borrow materials with less than 30 percent rock materials above 3/4-inch size and 6-inch maximum rock size shall be placed and compacted to 95 percent of maximum dry density (ASTM D 698). Use maximum loose lift thickness of 12-inches if using standard construction equipment. Lift thickness may be increased if compacted with heavier equipment, such as mine haul trucks, provided that 95 percent relative compaction is maintained throughout the entire thickness of the lift. • 5. Rock Random Fill: Random Fill containing more than 30 percent of material above 3/4-inch size shall be conditioned, placed, and compacted by compactive effort techniques. The type of compaction equipment, number of passes, and maximum rock size and loose lift thickness shall be approved by the Owner based on the acceptable test fill performance. 6. The Contractor will adopt methods to remove all oversize rock from the fill. Oversize rock will be stockpiled in a location designated by the Owner. J. Cushion Material: 1. Cushion Material shall be placed over the geosynthetic clay liner (GCL) in a maximum of two lifts to result in a minimum 2.5-foot-thick layer after construction is complete. 2. Condition to a moisture content which allows compaction to the required density without an excessive amount of effort and that results in a stable non- yielding surface. 3. Cushion Material shall be placed by dumping with trucks, loaders, or approved equipment, at the edge of the GCL and spreading over the GCL liner with construction equipment that exert a pressure of 8.0 psi or less when distributed to the liner. Equipment shall not be allowed to come in direct contact with the GCL. 4. Place Cushion Material in 30-inch maximum loose lifts and compact to the density specified below. 5. Cushion Material shall be conditioned, placed, and compacted by compactive effort techniques. The type of compaction equipment, number of passes, and maximum rock size and loose lift thickness shall be approved by the Owner Revision A I:W I74.TDiW?epidlmntla_ I uao" U-Trc yr V222.IhHi Mgrs vn?.ooc 02223-3 January 2008