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October 2001 -30- 003-2182.004 <br /> Field destructive testing of seams consisted of testing ten 1-inch wide coupons, five of which <br /> were tested for peel, and five of which were tested for shear. Poly-Flex tested the inside and <br /> outside tracks of the fusion welds for peel. Poly-Flex performed all destructive tests on site <br /> using a field tensiometer,and Golder observed and documented all tests. <br /> The specified acceptance criteria for LLDPE shear and peel tests was that four of the five <br /> coupons tested must have an ultimate strength of at least 112 and 96 ppi, respectively, and the <br /> peel tests must also achieve a Film Tear Bond (FTB)upon breaking. The specified acceptance <br /> criteria for HDPE shear and peel tests was that four of the five coupons tested must have an <br /> ultimate strength of at least 160 and 104 ppi, respectively, and the peel tests must also achieve a <br /> FTB upon breaking. One Upper fusion destructive test sample failed original testing and was <br /> bounded in accordance with the specifications. The failing seam length was capped and <br /> non-destructively tested by vacuum testing. <br /> The summaries of destructive test results for fusion and extrusion seams are presented in <br /> Appendix J-8a and J-8b. The Geomembrane Record Drawing No. 3 (Appendix A) shows the <br /> destructive test sample locations. <br /> 6.1.6 Non-Destructive Testing <br /> Poly-Flex performed non-destructive seam testing on completed seams and geomembrane <br /> repairs. Non-destructive testing for seams included pressure testing of fusion-welded seams, <br /> and vacuum testing of extrusion welded seams and repairs. Golder monitored and documented <br /> the non-destructive testing. <br /> Prior to pressure testing of fusion seams, Poly-Flex heat-sealed both ends of the air channel <br /> between the two tracks of the double wedge weld. Poly-Flex then inserted a pressure gauge in <br /> one end of the sealed channel. Poly-Flex pressurized the air channel to approximately <br /> 30 pounds per square inch (psi) using an air pump. After pressure stabilization, Golder <br /> I\00\2182\EXTERNAL POND RPWINALDOC Golder Associates <br />