Laserfiche WebLink
4 I 'As "1100 <br />A. General Earthfill material shall be used where indicated on the Construction <br />Drawings and for the construction of anchor and termination berms and backfill of <br />anchor trenches and to bring subgrade to required grade where no other material is <br />specified. The material shall be obtained from onsite excavations or stockpiles <br />and shall be free from roots, organic matter, trash, debris, rocks or clods larger <br />than 3 inches, and other deleterious materials. <br />A. Subgrade fill material shall be used at the locations shown on the Construction <br />Drawings. The material shall be obtained from onsite excavations or stockpiled <br />soil and shall be free from roots, organic matter, trash, debris, rocks or clods <br />larger than 3 inches, and other deleterious materials. <br />B. The top 3 -inches of subgrade fill shall not contain particles greater than 1/2 -inch <br />or any materials that may protude from the surface that could puncture the <br />overlying geosynthetics. <br />2.4 CLAY LINER <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. <br />B. The clay liner material shall be obtained from the onsite borrow source. The <br />EARTHWORK CONTRACTOR shall selectively excavate suitable clay liner <br />material from the onsite borrow source. <br />C. The Clay Liner material shall have similar characteristics to the clay material used <br />in the sealed double ring infiitrometer testing (see OWNER for SDRI test results). <br />It shall have a soil classification of clayey sand (SC), lean clay, sandy clay, or <br />silty clay (CL), or fat clay or sandy clay (CH), using the Unified Soil <br />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 />4. Field Hydraulic Conductivity: Maximum hydraulic conductivity of 1 x 10"7 <br />cm/sec measured using a sealed double ring infiltrometer (SDRI). An SDRI <br />for the clay liner material has been performed and the results may be <br />obtained from the OWNER. <br />5. Laboratory Hydraulic Conductivity: Maximum hydraulic conductivity of <br />3.1 x 10-8 cm/sec (based on correlation to maximum field hydraulic <br />conductivity; see existing SDRI test results) when compacted to a relative <br />compaction of 90 percent at a water content of 3 to 8 percent greater than <br />Forward Landfill WMU FU -06 <br />02300 5 EARTHWORK <br />