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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 reject non-conforming materials or to modify the refuse fill configuration, 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 /> Test Results.The QA/QC Consultant will examine all results from laboratory acceptance testing and <br /> will report any nonconformance to the Construction Manager. <br /> Acceptance Test Failure.If a Geomembrane acceptance sample does not comply with the minimum <br /> requirements of the Specifications,the Geomembrane roll from which the sample was taken will be <br /> failed by the QA/QC Consultant,and replaced by the Geomembrane Manufacturer at no additional <br /> cost to the Owner. The Design Engineer shall be contacted to determine additional acceptance <br /> testing requirements. <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 /> Page 28 <br />