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3.5 REPAIR PROCEDURES <br /> A. Remove damaged geomembrane and replace with acceptable geomembrane materials <br /> if damage cannot be satisfactorily repaired. <br /> B. Repair, removal, and replacement is at CONTRACTOR's expense if the damage <br /> results from the CONTRACTOR's activities. <br /> C. Repair any portion of the geomembrane exhibiting a flaw,or failing a destructive or <br /> non-destructive test. Agreement upon the appropriate repair method will be <br /> determined between the QA/QC CONSULTANT and the GEOSYNTHETICS <br /> CONTRACTOR. Do not commence welding on liner until trial weld test sample, <br /> made by that equipment and operator,passes trial test. Repair procedures available <br /> include: <br /> 1. Patching: Used to repair large holes (over .375 inch diameter), tears (over <br /> 2-inches-long), undispersed raw materials, and contamination by foreign <br /> matter. <br /> 2. Abrading and re-welding: Used to repair small sections of seams. <br /> 3. Spot welding or seaming: Used to repair small tears (less than 2-inches- <br /> long), pin holes or other minor, localized flaws. <br /> 4. Capping: Used to repair long lengths of failed seams. <br /> 5. Removing the seam and replacing with a strip of new material. <br /> D. In addition, satisfy the following procedures: <br /> 1. Abrade geomembrane surfaces to be repaired(extrusion welds only)no more <br /> than one (1) hour prior to the repair. <br /> 2. Clean and dry all surfaces at the time of repair. <br /> 3. The repair procedures,materials,and techniques must be accepted in advance <br /> of the specific repair ,by the QA/QC CONSULTANT and the <br /> GEOSYNTHETICS CONTRACTOR. <br /> 4. Extend patches or caps at least 6 inches beyond the edge of the defect, and <br /> round all corners of material to be patched and the patches to a radius of at <br /> least 3 inches. <br /> 5. Unless otherwise instructed by the OWNER, cut geomembrane below large <br /> caps to avoid water or gas collection between the sheets. <br /> E. Verification of repair: <br /> 1. Number and log each repair. <br /> 2. Non-destructively test each repair using methods specified in Article 3.4 of <br /> this Section. <br /> 3. Destructive tests may be required at the discretion of the QA/QC <br /> CONSULTANT. <br /> FORWARD LANDFILL 02778 <br /> HIGH DENSITY POLYETHYLENE <br /> 23 (HDPE)GEOMEMBRANE <br />