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Contractor in the event of failed test results. <br /> If the laboratory test fails in either peel or shear,the Geosynthetics Contractor must either reconstruct <br /> the entire seam,or recover additional samples at least 10 feet on either side of the failed sample for <br /> retesting. This process is repeated until passed tests bracket the failed seam section. All seams must <br /> be bounded by locations from which passing laboratory tests have been taken. Laboratory testing <br /> governs seam acceptance. In no case can field testing of repaired seams be used for final acceptance. <br /> 4.2.5 Repairs <br /> Portions of geomembrane panels and seams that: (1) contain a flaw; (2) a destructive test; or (3) <br /> nondestructive test cuts of holes, must be repaired in accordance with the Specifications. The <br /> QA/QC Inspector must locate and record all repairs on the repair sheet and panel layout drawing. <br /> Acceptable repair techniques include the following: <br /> • Patching-used to repair large holes,tears,large panel defects,undispersed raw materials, <br /> welds, contamination by foreign matter, and destructive sample locations. <br /> • Extrusion - used to repair small defects in the panels and seams. In general, this <br /> procedure should be used for defects less than❑-inch in the largest dimension. <br /> • Capping - used to repair failed welds or to cover seams where welds cannot be <br /> nondestructively tested. <br /> • Removal - used to replace area with large defects where preceding methods are not <br /> appropriate. Also used to remove excess material (wrinkles, fishmouths,intersections, <br /> etc.) from the installed geomembrane. Areas of removal shall be patched or capped. <br /> Repair procedures include the following: <br /> • Abrade geomembrane surfaces to be repaired(extrusion welds only)no more than 1 hour <br /> before the repair. <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 /> Page 29 <br />