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Cripple Creek & Victor Gold Mining Company <br />Cresson Project <br />Quality Assurance Monitoring and Test Results <br />Liner Recertification <br />December 17, 2009 <br />ameO <br />AMEC assigned each geomembrane panel a number. Geomembrane panels deployed in the <br />Phase IVa ramp were numbered 1 through 8. The geomembrane panels deployed in the Phase <br />IVc LOB were numbered 1 through 6. <br />AMEC marked the panel designation and roll number directly on each panel after it was <br />deployed. The geomembrane panel layouts are presented in Figures 4 and 5. <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 />i <br />S: \PROJECTS \1125E CCV COA \H2 - DESIGN\LINER RECERTIFICATION REPORT\REPORT BODYM MONTIORING AND TEST RESULTS LINER 18 <br />RECERTIFICATION.DOC <br />