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before the repair. 0 <br />• Clean and dry all surfaces at the time of repair. <br />• Verify acceptance of the repair procedures, materials and techniques by the QA/QC <br />Inspector in advance of the specific repair. <br />• Extend patches or caps at least 6 inches beyond the edge of the defect, and round all <br />corners of material to be patched and the patches to a radius of at least 3 inches. Bevel <br />the top edges of patches before extrusion welding. <br />4.2.6 Wrinkles <br />During placement of materials over the geomembrane, temperature changes or creep may cause <br />wrinkles to develop in the geomembrane. Any wrinkles which can fold over must be repaired either <br />by cutting out excess material or, if possible, by allowing the geomembrane to contract by <br />temperature reduction. In no case can material be placed over the geomembrane which could result <br />in the geomembrane folding. The QA/QC Inspector must monitor geomembrane for wrinkles and <br />notify the, QA/QC Manager and Geosynthetics Contractor is wrinkles are being covered by soil. The <br />QA/QC Inspector is then responsible for documenting corrective action to remove the wrinkles. <br />4.2.7 Folded Material <br />All folded geomembrane must be removed. is <br />4.2.8 Geomembrane Anchor Trench <br />The geomembrane anchor trench should be left open until seaming is completed. Expansion and <br />contraction of the geomembrane should be accounted for in the liner placement. The anchor trench <br />should be filled in the morning when temperatures are coolest to reduce bridging of the <br />geomembrane. <br />4.2.9 Leak Location Testing <br />The QA/QC Consultant will perform leak location testing on the HDPE geomembrane twice during <br />construction of the cell. The first test shall be performed following geomembrane installation. The second test <br />shall be performed following placement of the granular drainage material and protective operations layer over <br />the geomembrane. The requirements for the leak location testing are included in Attachment A. <br />4.3 Geotextiles <br />4.3.1 Delivery <br />During delivery of geotextiles the QA/QC Inspector will: <br />Page 36 0 <br />