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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 /> 3.9 CONSTRUCTION OF CLAY EARTHFILL <br /> A. General: <br /> 3. Clay Earthfill Material shall be processed to meet the requirements of <br /> Article 2.4 of this Specification. The EARTHWORK CONTRACTOR <br /> shall have the option to determine construction procedures to be used, <br /> subject to the approval and acceptance testing by the QA/QC <br /> CONSULTANT. <br /> 4. The EARTHWORK CONTRACTOR shall process the Clay Earthfill <br /> Material suitable for the purpose intended. After processing, the Clay <br /> Earthfill Material shall be free from dry clods, roots, organic matter, frozen <br /> material, debris, rocks or stones larger than 1 inch, and other deleterious <br /> material. Clay Material shall be thoroughly blended and compacted to <br /> provide a homogeneous material relatively uniform in gradation and <br /> moisture content. <br /> 5. The Clay Earthfill Material shall be as uniform as possible, free of <br /> penetrating cracks, and having interlift boundaries completely blended. The <br /> soil shall be compacted to produce a soil structure having low hydraulic <br /> 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 earthfill shall be as <br /> shown on the Construction Drawings. <br /> 3. Moisture conditioning shall be uniform throughout each lift <br /> 4. The clay earthfill) 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 /> 5 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 Earthfill Material. <br /> 6. Clay Earthfill Material shall not be placed at a water content that is high <br /> enough 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 /> Forward Landfill WMU FU-14 <br /> 02300 17 EARTHWORK <br />