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Cripple Creek & Victor Gold Mining Company <br />Cresson Project <br />Quality Assurance Monitoring and Test Results <br />Phase 46/C Triangle Liner Certification <br />August 10, 2010 <br />Lonestar constructed approximately 572 linear feet of fusion welded seams and 216 linear feet <br />of extrusion welded seams. The specified frequency of destructive testing was one test per <br />500 lineal feet of weld. AMEC identified and Lonestar obtained destructive samples from the <br />geomembrane panel seams at a frequency of one destructive test sample per 286 linear feet of <br />fusion welded seams. The test frequencies exceeded project requirements. <br />Lonestar tested the inside and outside tracks of the fusion welds for peel. Lonestar performed <br />all destructive tests on-site using a field tensiometer, and AMEC observed and documented all <br />tests. <br />The specified acceptance criteria for 100-mil single sided texture LLDPE shear tests was that <br />four of the five coupons tested must have an ultimate strength of at least 130 pounds per pulling <br />inch (ppi) prior to yield. The specified acceptance criteria for peel tests was that four of the five <br />coupons tested must have ultimate strength of at least 100 ppi and achieve a Film Tear Bond <br />(FTB) upon breaking. All destructive fusion seam and extrusion seam samples met <br />specifications. <br />The summaries of destructive test results for fusion and extrusion seams for the geomembrane <br />are presented in Appendix H-6. Figure 5 shows the destructive test sample locations. <br />. 6.1.6 Non-Destructive Testing <br />Lonestar 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. AMEC monitored and documented <br />¦ the non-destructive testing. <br />Prior to pressure testing of fusion seams, Lonestar heat-sealed both ends of the air channel <br />between the two tracks of the double wedge weld. Lonestar then inserted a pressure gauge in <br />one end of the sealed channel. Lonestar pressurized the air channel to approximately <br />30 pounds per square inch (psi) using an air pump. After pressure stabilization, AMEC <br />monitored the gauge for a minimum of five minutes. The maximum allowable pressure drop <br />was 3 psi. <br />Lonestar 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 seam. <br />If the gauge pressure dropped to zero, the seam was determined to be continuous. In cases <br />where the seam was found to be discontinuous, the seam was subdivided into shorter sections <br />until continuous seam sections were located and passing pressure tests were performed, or the <br />outer edge of the seam was extrusion welded and vacuum tested. <br />S:\PROJECTS\1125E CCV CQA\H2 - DESIGN\TRIANGLE\FINAL\TRIANGLE CERTIFICATION REPORT FINAL REVI.DOC 19