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<br /> <br /> Forward Landfill WMU FU-23 02300 6 EARTHWORK <br />2.4 CLAY EARTHFILL MATERIAL <br /> <br /> A. A natural clayey material free from roots, organic matter, frozen material, debris, <br />solid waste, rocks, or slag larger than 1 inch, and other deleterious materials. The <br />Clay Earthfill material shall be obtained from the clay stockpile in the WMU FU- <br />23 area. The clay stockpile shall be relocated to the East Stockpile and Borrow <br />Area and shall be separated from the general earthfill stockpile <br /> <br />B. The EARTHWORK CONTRACTOR shall also selectively excavate suitable clay <br />earthfill material during excavation of WMU FU-23 and place in the clay <br />stockpile area. The EARTHWORK CONTRACTOR shall provide personnel <br />capable of identifying soils suitable for the Clay Earthfill. <br /> <br />B. The Clay Earthfill material shall have a soil classification of clayey sand (SC), <br />lean clay, sandy clay, or silty clay (CL), or fat clay or sandy clay (CH), using the <br />Unified Soil Classification System and shall meet the following requirements: <br /> 1. Particle Size: Material having 100 percent by weight passing 1-inch sieve, <br />90 percent by weight passing U.S. No. 4 sieve and at least 60 percent by <br />weight passing U.S. No. 200 sieve. The maximum in-place dry clod size <br />shall be 1 inch. <br /> 2. Liquid Limit: 25 minimum to 60 maximum. <br />3. Plasticity Index: 10 to 40. <br /> <br />2.5 GRANULAR DRAINAGE MATERIAL <br /> <br /> A. Granular Drainage Material (GDM): Clean, washed, well-rounded, hard, durable <br />sandy gravel free from foreign materials. Material shall have a maximum particle <br />size of 3/8 inch and shall have less than 3 percent passing the No. 200 sieve. The <br />minimum hydraulic conductivity to water shall be 0.1 cm/sec. <br /> <br /> B. GDM shall contain no limestone or other material that will adversely react with <br />leachate. <br /> <br /> C. The GDM shall be provided by the EARTHWORK CONTRACTOR. <br /> <br /> <br />2.6 COARSE GRAVEL <br /> <br /> A. Clean, washed, well-rounded, hard, durable gravel free from dirt, clay clods, <br />roots, and other foreign materials. Material shall conform to the following <br />washed sieve gradation as determined by ASTM C117 and C136: <br /> <br />Sieve Size Percent Passing by Weight <br />1" 100 <br />1/2" 15