2014-02-07_REPORT - M1980244 (3)

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Cripple Creek & Victor Gold Mining Company PSES Pipe Rack Liner Extension Final Report Quality Assurance Monitoring & Test Results February 4, 2014 ameO AMEC personnel observed the testing of trial seam samples and documented test results. Tensile testing of each trial seam coupon was observed to verify project yield strengths were met during shear testing and failure did not occur in the weld during peel testing. When trial seams did not meet specifications, AMEC verified the welding apparatus was not used until two consecutive trial seams performed by the same technician /apparatus combination met specifications. The trial seam test results for extrusion and fusion seaming are presented in Appendix J.2. ECA used one tensiometer during the project and one spare tensiometer was maintained on site. Tensiometer certifications are presented in Appendix L. Figures 3 and 4 show the codes used to designate passing and failing test results. 6.3.2 Seaming Observations AMEC personnel observed seams before, during and after welding. Each seam was checked for adequate overlap prior to welding and to verify the seam area was clean and dry. AMEC documented which ECA technician performed the seaming and what seaming equipment was used. Following the completion of a seam and routine repairs, AMEC checked the full length of each seam to verify no additional repairs were required. In the event additional repairs were needed, AMEC marked the location requiring repair on the geomembrane, documented the location, and brought the repair area to the attention of ECA. Once ECA made repairs, AMEC checked the repair location to verify completion. All seams were inspected for quality and completion. AMEC personnel conducted a final walk through to verify completion of the entire geomembrane system and to identify any additional damage that may have occurred during construction operations. Recorded observations made during seaming for the PSES Pipe Rack Liner Extension geomembrane met project specifications and a summary is presented in Appendix J.3. 6.4 Defect and Repair Observations AMEC inspected geomembrane panels for damage that may have occurred during manufacture, transport, deployment, or installation. Any damage noted (during or after deployment) by AMEC was reported. AMEC repeatedly observed all panels and seams for defects until Ames covered the geomembrane with DCF. AMEC documented defects by assigning a unique defect identification code to each defect, and marked each defect code on the geomembrane. The summaries of defects and repairs, including the approximate locations of each repair, are presented in Appendix J.4. 15