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In addition to the above listed acceptance testing, the QA/QC Consultant shall perform interface <br /> direst shear tests between the following surfaces: <br /> • 60-mil textured HDPE geomembrane/clay liner <br /> • GCL/60-mil textured HDPE geomembrane/Geocomposite Drainage Net <br /> • 60-mil textured HDPE geomembrane/cushion geotextile <br /> The QA/QC Consultant shall obtain representative samples of all required materials to perform a <br /> 12-inch by 12-inch direct shear tests in accordance with ASTM D5321. The direct shear tests shall <br /> be performed as described in the Specifications. The results of all interface direct shear testing shall <br /> be provided in the CQA Report and to the Design Engineer. The Design Engineer will use these <br /> results to modify the refuse fill configuration for WMU FU-04, if necessary. <br /> Sampling Procedure. Samples will be taken across the entire roll width. Samples may be cut for <br /> shipping purposes, but a minimum of five square feet must be sent to the testing laboratory. <br /> Samplers must mark the machine direction and the manufacturer's roll identification number on the <br /> sample(each piece). Samplers will also assign an acceptance test number to the sample and mark <br /> the sample with that number. <br /> 4.2.3 Geomembrane Installation <br /> Surface Preparation. The soil surface must be prepared in accordance with the Specifications. <br /> Before geomembrane installation, the subgrade will be inspected by the QA/QC Inspector and <br /> Geosynthetics Contractor. The QA/QC Inspector must verify the following: <br /> • All lines and grades for soil surface have been verified by the Earthwork Contractor. <br /> • The soil surface has been rolled and compacted to be free of surface irregularities,loose <br /> soil, and protrusions. <br /> • The soil surface does not contain stones or other objects that could damage the <br /> geomembrane. <br /> • The anchor trench dimensions have been checked, and the trenches are free of sharp <br /> objects and stones. <br /> • There are no excessively soft areas. <br /> • The soil surface is not saturated, and no standing water is present. <br /> • The soil surface has not desiccated. <br /> Page 27 <br />