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PROTECTION OF EXPOSED SURFACES, of this Section. In addition, <br />the clay liner shall be protected from any contamination that increases the <br />hydraulic conductivity. Any contaminated material shall be removed and <br />replaced at no cost to the OWNER. <br />3.10 CONSTRUCTION OF CLAY PLUG AND CLAY EARTHFILL <br />A. General: <br />3. Clay Plug Material shall be processed to meet the requirements of Article <br />2.5 of this Specification. The EARTHWORK CONTRACTOR shall have <br />the option to determine construction procedures to be used, subject to the <br />approval and acceptance testing by the QA/QC CONSULTANT. <br />4. The EARTHWORK CONTRACTOR shall process the Clay Plug and Clay <br />Earthfill Material suitable for the purpose intended. After processing, the <br />Clay Plug and Clay Earthfill Material shall be free from dry clods, roots, <br />organic matter, frozen material, debris, rocks or stones larger than 1 inch, <br />and other deleterious material. Clay Plug and Clay Earthfill Material shall <br />be thoroughly blended and compacted to provide a homogeneous material <br />relatively uniform in gradation and moisture content. <br />5. The Clay Plug and Clay Earthfill Material shall be as uniform as possible, <br />free of penetrating cracks, and having interlift boundaries completely <br />blended. The soil shall be compacted to produce a soil structure having low <br />hydraulic conductivity. <br />B. Compaction: <br />1. Soil shall be spread evenly over the prepared subgrade with a thickness as <br />required to achieve a 6 -inch compacted lift, with a maximum 8 -inch loose <br />lift. <br />2. The minimum final thickness and extent of the clay plug and clay earthfill <br />shall be as shown on the Construction Drawings. <br />3. Moisture conditioning shall be uniform throughout each lift <br />4. The clay plug and clay earthfill material shall be compacted in-place to a <br />minimum dry density of 90 percent relative compaction at a water content <br />of 3 to 6 percent greater than the optimum water content as measured by <br />ASTM D1557. <br />5. Scarify surface of each lift to a depth of 2 inches prior to placing the <br />subsequent lift of Clay Plug and Clay Earthfill Material. <br />6. Clay Plug and Clay Earthfill Material shall not be placed at a high water <br />content so that excessive cracking occurs when the material dries out. <br />C. Moisture Control <br />1. During compacting operations, maintain water content in each lift within the <br />range of 3 to 6 percent greater than the optimum water content. <br />Forward Landfill WMU FU -06 <br />02300 18 EARTHWORK <br />