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<br /> Page 29 <br />Contractor in the event of failed test results. <br /> <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 /> <br />4.2.5 Repairs <br /> <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 /> <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 /> <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 /> <br /> Capping - used to repair failed welds or to cover seams where welds cannot be <br />nondestructively tested. <br /> <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 /> <br />Repair procedures include the following: <br /> <br /> Abrade geomembrane surfaces to be repaired (extrusion welds only) no more than 1 hour <br />before the repair. <br /> <br /> Clean and dry all surfaces at the time of repair. <br /> <br /> Verify acceptance of the repair procedures, materials and techniques by the QA/QC <br />Inspector in advance of the specific repair. <br /> <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 /> <br />4.2.6 Wrinkles <br />