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�J <br />C. Repair Procedures <br />1. Defective seams shall be reconstructed as described in these SPECIFICATIONS. <br />2. Small holes shall be repaired by abrading the sheet surface and welding an extrusion <br />bead. If the hole is larger than one - quarter (1/4) inch in diameter it shall be patched. <br />3. Tears shall be repaired by patching. Where the tear is on a slope or an area of stress and <br />has a sharp end it must be rounded prior to patching. <br />4. Blisters, large holes, undispersed raw materials, and contamination by foreign matter shall <br />be repaired by patches. <br />5. Surface of geomembrane that are to be patched shall be abraded and cleaned no more <br />than fifteen (15) minutes prior to the repair. No more than 10% of the thickness shall be <br />removed. <br />D. Patches shall be round or oval in shape, and extend a minimum of six (6) inches beyond the edge <br />of defects. All patches shall be of the same compound and thickness as the geomembrane <br />specified. All patches shall have their top edge beveled to an approximately 45- degree angle with <br />an angle grinder prior to placement of the patch. Patches shall be applied using approved methods <br />only. <br />is <br />E. The extrusion welding process shall restart by grinding the existing seam and rewelding a new <br />seam. Welding shall commence where the grinding started and must overlap the previous seam by <br />at least two (2) inches. Reseaming over an existing seam without regrinding shall not be permitted. <br />F. Each repair shall be non - destructively tested, except when CERTIFYING ENGINEER requires a <br />destructive seam sample obtained from a repaired seam. Repairs that pass the destructive test shall <br />be taken as an indication of an adequate repair. Failed tests indicate that the repair shall be <br />repeated and retested until passing test results are achieved. <br />Recording the Results: Daily documentation of all non - destructive and destructive testing shall be <br />provided to MANAGER by CQA Monitor. This documentation shall identify all seams that <br />initially failed the test and include evidence that these seams were repaired and successfully <br />retested. <br />3.11 CONFORMANCE TESTING <br />A. During manufacturing of the geomembrane, CQA Monitor will be present to obtain and forward <br />samples to the Quality Assurance Testing Laboratory for testing to ensure conformance with the <br />SPECIFICATIONS. <br />B. Samples will be taken across the entire width of the roll and shall not include the first three (3) <br />feet. Unless otherwise stated, samples will be three (3) feet long by the width of the roll. CQA <br />Monitor will mark the machine direction on the samples with an arrow. Unless otherwise stated, <br />samples shall be taken at a frequency of no less than one per one hundred fifty thousand (150,000) <br />square feet. As a minimum, the following tests will be performed to verify conformance to the <br />design SPECIFICATIONS with minimum values specified in Section 2776, Article 2.01.: <br />Section 02776 <br />Geomembrane <br />Page 21 of 22 September 3, 2008 <br />Revision 1 <br />SAProjects\1125E CCV CQA \I - Tech Specs \02776.r1.doc <br />