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0 amece <br />The specified acceptance criteria for 80-mil textured LLDPE to 80-mil textured LLDPE shear <br />tests was that four of the five coupons tested must have an ultimate strength of at least <br />120 pounds per pulling inch (ppi) prior to yield. The specified acceptance criteria for peel <br />tests was that four of the five coupons tested must have ultimate strength of at least 100 ppi <br />and achieve a Film Tear Bond (FTB) upon breaking. All destructive fusion seam and <br />extrusion seam samples met specifications. <br />The summaries of destructive test results for fusion seams for the 2010 Phase 5 OSA <br />primary geomembrane are presented in Appendix J-5. Record Drawing No. 5 presented in <br />Appendix A shows the destructive test sample locations. <br />6.1.6 Non-Destructive Testing <br />Lone Star performed non-destructive seam testing on completed seams and geomembrane <br />repairs. Non-destructive testing for seams included pressure testing of fusion-welded <br />seams, and vacuum testing of extrusion welded seams and repairs. AMEC monitored and <br />documented the non-destructive testing. <br />Prior to pressure testing of fusion seams, Lone Star heat-sealed both ends of the air <br />channel between the two tracks of the double wedge weld. Lone Star then inserted a <br />pressure gauge in one end of the sealed channel. Lone Star pressurized the air channel to <br />approximately 30 pounds per square inch (psi) using an air pump. After pressure <br />stabilization, AMEC monitored the gauge for a minimum of five minutes. The maximum <br />allowable pressure drop was 3 psi. <br />Lone Star and AMEC verified fusion seam continuity before heat-sealing both seam ends, <br />completed pressure testing, and with the gauge left in place, cut the opposite end of the <br />seam. If the gauge pressure dropped to zero, the seam was determined to be continuous. <br />In cases where the seam was found to be discontinuous, the seam was subdivided into <br />shorter sections until continuous seam sections were located and passing pressure tests <br />were performed, or the outer edge of the seam was extrusion welded and vacuum tested. <br />AMEC Earth & Environmental, Inc. <br />2000 S. Colorado Blvd 2-1000 <br />Denver, CO 80222 <br />Tel 303-935-6505 <br />Fax 303-935-6575 www.amec.com <br />47