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PROTECTION OF EXPOSED SURFACES, of this Section. In addition, <br /> the clay liner shall be protected from any contamination which 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 <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 Material <br /> suitable for the purpose intended. After processing, the Clay Plug Material <br /> shall be free from dry clods, roots, organic matter, frozen material, debris, <br /> rocks or stones larger than 1 inch, and other deleterious material. Clay Plug <br /> Material shall be thoroughly blended and compacted to provide a <br /> homogeneous material relatively uniform in gradation and moisture content. <br /> 5. The Clay Plug Material shall be as uniform as possible, free of penetrating <br /> cracks, and having interlift boundaries completely blended. The soil shall <br /> be compacted to produce a soil structure having low hydraulic conductivity. <br /> B. Clay Plug 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 shall be as shown <br /> on the Construction Drawings. <br /> 3. Moisture conditioning shall be uniform throughout each lift <br /> 4. The clay plug material shall be compacted in-place to a minimum dry <br /> density of 90 percent relative compaction at a water content of 3 to <br /> 8 percent greater than the optimum water content as measured by ASTM <br /> D1557. <br /> 5. Scarify surface of each lift to a depth of 2 inches prior to placing the <br /> subsequent lift of Clay Plug Material. <br /> 6. Clay Liner Material shall not be placed at a high water content so that <br /> excessive cracking occurs when the material dries out. <br /> C. Moisture Control <br /> 1. During compacting operations, maintain water content in each lift of the <br /> Clay Plug Material within range of 3 to 8 percent greater than the optimum <br /> water content. <br /> Forward Landfill WMU FU-04 <br /> 02300 17 EARTHWORK <br />