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F. The geosynthetic clay liner shall not be installed during precipitation or other <br /> conditions that may cause hydration of the geosynthetic clay liner. <br /> G. The geosynthetic clay liner shall be installed as shown on the Construction <br /> Drawings, or as otherwise indicated by the Manufacturer, if approved by the QA/QC <br /> CONSULTANT. <br /> H. Geomembrane installation shall immediately follow the geosynthetic clay liner <br /> installation. All geosynthetic clay liner that is placed during a day's work shall be <br /> covered with geomembrane before the GEOSYNTHETICS CONTRACTOR leaves <br /> the site at the end of the day. <br /> I. Geomembrane shall not be placed on a geosynthetic clay liner that is hydrated. <br /> J. All geomembrane seams shall be welded after each geomembrane panel is placed <br /> over the geosynthetic clay liner. Heat sealing of seams for geomembrane placed <br /> over GCL alone is not acceptable. <br /> K. All geomembrane defects and destructive sample locations shall be immediately <br /> repaired. <br /> L. Operations layer soil overlying the liner system components shall immediately <br /> follow the installation of the geomembrane and other geosynthetics overlying the <br /> geosynthetic clay liner. If areas cannot be covered immediately due to steepness of <br /> slopes, visqueen shall be placed over geosynthetic components overlying the <br /> geosynthetic clay liner. The geosynthetic clay liner shall be removed and replaced if <br /> it becomes hydrated. <br /> M. All hydrated geosynthetic clay liner shall be removed and replaced by the <br /> GEOSYNTHETICS CONTRACTOR at no additional cost to the OWNER. <br /> Hydrated GCL is defined as material that has become soft as determined by <br /> squeezing the material with finger pressure, material that has exhibited swelling, or <br /> material that has a moisture content greater than 100 percent as determined by <br /> ASTM D2216 or ASTM D4643. Cause for replacement of the GCL due to <br /> exposure to moisture and subsequent hydration shall be determined at the QA/QC <br /> CONSULTANT's sole discretion. <br /> 3.6 SEAMS AND OVERLAPS <br /> A. On slopes steeper than 10 horizontal to 1 vertical, all geosynthetic clay liners shall <br /> be continuous down the slope; that is, no horizontal seams shall be allowed on the <br /> slope. <br /> B. No horizontal seams shall be allowed on the base and the crest of the landfill within <br /> 5 ft (1.5 m)of the toe or the crest of the slope. <br /> Forward Landfill WMU FU-04 8 GEOSYNTHETIC CLAY LINER (GCL) <br /> 02777 <br />