2009-07-15_REVISION - M1980244 (23)

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Cripple Creek & Victor Gold Mining Company Cresson Project ameO Quality Assurance Monitoring and Test Results Load Out Bin Relocation July 7, 2009 6.1.3.1 Trial Seam Monitoring Lonestar performed trial seams to monitor the performance of the seaming apparatus and operator under actual site conditions. Each welding operator and his apparatus produced trial seams prior to the beginning of each day's seaming operation and in the event that devices were disconnected from power and re-energized. Lonestar cut 1-inch wide samples (coupons) from each trial seam and tested the coupons with a field tensiometer. Lonestar tested each double wedge fusion trial seam twice for peel adhesion (peel) and once for bonded seam strength (shear). Lonestar conducted peel tests on fusion welds on both the inner and outer tracks of each peel coupon. Lonestar tested each extrusion trial seam twice for peel and once for shear. AMEC personnel observed the testing of trial seam samples and documented test results. AMEC observed the tensile testing of each trial seam coupon to verify that project yield strengths were met during shear testing and that failure did not occur in the weld during peel testing. When trial seams did not meet specifications, AMEC verified that 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. Lonestar used two tensiometers during the project. Tensiometer certifications are presented in Appendix L. Figures 3 and 4 show the codes used to designate passing and failing test results. It should be noted that on April 26, 2009, two trial seams were completed prior to starting work and seam welding did not start until 45-55 minutes after the trial seams were completed. This did not occur during panel deployment and occurred during capping and patch repair work. All seams were tested and passed 6.1.3.2 Seaming Observations AMEC personnel observed seams before, during and after welding. AMEC checked each seam for adequate overlap prior to seaming and to verify that the seam area was clean and dry. AMEC documented Lonestar personnel performing the seaming and the seaming equipment used. Following the completion of seaming and routine repairs, AMEC checked the full length of each seam to verify that no additional repairs were required. In the event that 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 Lonestar. Once Lonestar made repairs, AMEC checked the repair location to verify completion. AMEC inspected all seams 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. SAPROJECTS11125E CCV CQAIH3 - CONSTRUCTIONILOB CERT REPORTIREPORT BODYILOB CERT REPORT 2009.07.07.DOC 20