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1 <br />1 <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br />1 <br />1 <br />1 <br />September 28, 1998 <br />construction plan. Proper fencing, warning signs, and other precautionary <br />measures, as necessary, shall be implemented. <br />G. Comply with the requirements of the Site Health and Safety Plan for Construction <br />Activities. <br />1.6 DUST AND SEDIMENT CONTROL <br />A. Contractor shall take adequate precautions to avoid dust emission resulting from <br />earthwork. <br />B. Contractor shall control release of sediment from excavated areas to limit sediment <br />loading to local creeks, and gulches. <br />1.7 QUALITY CONTROL <br />A. Contractor shall use an adequate number of skilled workers experienced in the type <br />of work to be performed. <br />B. Contractor or Owner shall employ the services of an independent geotechnical <br />laboratory to perform quality control testing for earthwork as specified herein. <br />Engineer or its Representative may perform periodic quality assurance testing. <br />C. Nuclear densometer testing of compacted soils in accordance with ASTM D2922 <br />or sand-cone testing in accordance with ASTM D1556 to confirm in-place <br />compacted density and moisture of fill materials as compared either with ASTM <br />D698 (Standard Proctor Compaction Curve), or ASTM D1557 (Mod Proctor <br />Compaction Curve) will be performed by either the Engineer or Engineers <br />representative. The minimum field density test frequency will be one test per 500 <br />cubic yards of compacted fill, with at least one test for each lift of material <br />compacted in the pond embankment or at the discretion of the engineer in the field. <br />Any area that fails to meet the compaction acceptance criteria shall be reworked <br />until a subsequent test shows acceptable results. <br />D. Contractor shall perform construction surveys, as needed, to ensure that the lines <br />and grades of all excavations, embankments, ponds, ditches, and graded surfaces <br />are in accordance with the design requirements. <br />E. The Engineer will perform periodic quality assurance monitoring. Contractor shall <br />cooperate, as required, in quality assurance monitoring. <br />The dimensions and grades of the tailings pond, diversion ditches and channels <br />shall be verified by survey, prior to installation of any geosynthetics. <br />PART 2 MATERIALS <br />2.1 CONSTRUCTION FILL <br />' Ja646115PEC5FNL.WP~ <br />Earthwork <br />02200-2 <br />