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through the weld or at the weld/sheet interface shall be considered a failure, unless the weld <br />strength exceeds the sheet strength, as discussed in Section 2776, Item 2.01. The tensiometer shall <br />have a grip separation of four (4) inches plus the width of the seam. The seam is to be centered <br />between the clamps. The grip separation rates for LLDPE are twenty (20) inches per minute for <br />shear and twenty (20) inches per minute for peel. These tests shall not fail according to the criteria <br />in Article 2.01. <br />E. CQA Monitor must witness the testing of all destructive samples. Destructive tests will be <br />performed within two (2) days of the samples being obtained. <br />F. Failing tests shall be subjected to additional testing until a passing area is found. A passing area is <br />defined as a seam(s) bounded at each end by a passing destructive test. Seams will be tracked in <br />each direction until a passing destructive test is found or until a previous passing destructive test is <br />reached. Seams will be tracked according to the welding apparatus and the machine operator. The <br />following procedures shall apply whenever a sample fails the field destructive test: <br />1. CONTRACTOR can retrace the welding path to an intermediate location (at a minimum <br />of ten (10) feet from the location of the failed test), at CERTIFYING ENGINEER <br />discretion, and take a small sample for an additional field test. If this test passes, then the <br />seam shall be cap stripped between that location and the original failed location. If the <br />test fails, the process shall be repeated. <br />2. Over the length of seam failure, CONTRACTOR shall either cut out the old seam, <br />reposition the panel and reseam, or add a cap strip, as required by CERTIFYING <br />ENGINEER. <br />3. After reseaming or placement of the cap strip, additional destructive field test(s) shall be <br />taken within the reseamed area. The reseamed sample shall be found acceptable if test <br />results are approved by CERTIFYING ENGINEER. If test results are not acceptable, <br />this process shall be repeated until the reseamed length is judged satisfactory by <br />MANAGER and CERTIFYING ENGINEER. <br />4. Samples taken as the result of failed tests do not count toward the total number of <br />destructive tests required. <br />G. CONTRACTOR shall document all actions taken in conjunction with destructive test failures, <br />with CERTIFYING ENGINEER providing Quality Assurance documentation. <br />H. Cap strips shall be non - destructively tested as described in Section 3.08. <br />3.10 DEFECTS AND REPAIRS <br />A. All seams and non -seam areas of the geomembrane shall be observed by CQA Monitor for defects, <br />holes, blisters, undispersed raw materials, and any sign of contamination by foreign matter. The <br />surface of the geomembrane shall be clean at the time of observation. The geomembrane surface <br />shall be brushed, blown, or washed by CONTRACTOR if the amount of dust or mud inhibits <br />inspection. MANAGER and CERTIFYING ENGINEER shall determine if cleaning of the <br />geomembrane is needed to facilitate observation at no additional cost to CC &V. <br />B. Each suspect location in seam and non -seam areas shall be non - destructively tested as determined <br />appropriate by CQA Monitor, in the presence of CQA Monitor. Each location that fails the non- <br />destructive testing shall be marked by CONTRACTOR, and repaired accordingly. <br />Section 02776 Page 20 of 22 September 3, 2008 <br />Geomembrane Revision 1 <br />SAProjects \7125E CCV CQA \I - Tech Specs \02776.0.doc <br />