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Cripple Creek & Victor Gold Mining Company <br />Cresson Project <br />Quality Assurance Monitoring and Test Results <br />Phase 4B/C Triangle Liner Certification <br />August 10, 2010 <br />During geomembrane deployment, AMEC measured sheet thickness with a digital caliper. <br />AMEC measured sheet thickness at five random locations along one edge of each <br />geomembrane panel. The average thickness specified for the 100-mil geomembrane was 101 <br />mils. Project specifications for 100-mil geomembrane required that the average of the five <br />thickness measurements be no less than the 100 mils, and that no individual measurement be <br />less than 90 mils. The thickness monitoring provided by AMEC indicated that all of the panels <br />' met or exceeded project requirements. <br />AMEC personnel measured deployed panel lengths by use of a measuring wheel. Recorded <br />lengths were approximate, and do not reflect any trimming or adjustments made for final <br />placement or anchor trench lengths. <br />AMEC personnel observed the surface of each deployed panel. AMEC logged any penetration <br />defects and marked them on the panel. Section 6.1.4 provides further discussion of repairs. <br />AMEC also observed the overlap of each panel with adjacent panels to verify that sufficient <br />overlap for seaming existed. AMEC logged insufficient panel overlaps as defects and marked <br />them for correction. <br />Ames surveyed all panel intersections and destructive seam sample locations. <br />6.1.3 Seaming <br />The double wedge fusion weld was the principal seaming method employed by Lonestar for this <br />project. Lonestar fusion seamed (welded) geomembrane on the same day that it was deployed. <br />Lonestar used extrusion welds for seaming where the geomembrane tied into the existing VLF <br />geomembrane. AMEC observed trial seam tests, monitored seaming equipment temperatures <br />and speed, and provided visual observation of the seaming procedures. AMEC observed the <br />entire lengths of all seams, patches, and other repairs either during seaming, or shortly after <br />completion. <br />6.1.3.1 Trial Seam Monitoring <br />Lonestar performed trial seams to monitor the performance of the seaming apparatus and <br />operator under actual site conditions. Each welding operator and his apparatus produced trial <br />seams prior to the beginning of each day's seaming operation and in the event that devices <br />were disconnected from power and re-energized. <br />Lonestar cut 1-inch wide samples (coupons) from each trial seam and tested the coupons with a <br />field tensiometer. Lonestar tested each double wedge fusion trial seam twice for peel adhesion <br />(peel) and once for bonded seam strength (shear). Lonestar conducted peel tests on fusion <br />welds on both the inner and outer tracks of each peel coupon. Lonestar tested each extrusion <br />trial seam twice for peel and once for shear. <br />S:\PROJECTS\1125E CCV CQA\H2 - DESIGN\TRIANGLE\FINAL\TRIANGLE CERTIFICATION REPORT FINAL REVI.DOC 17