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v <br />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 />