Laserfiche WebLink
• 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. <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 35 is <br />