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ameO <br />6.2.3.1 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 />AMEC personnel observed the testing of trial seam samples and documented test results. <br />AMEC observed the tensile testing of each trial seam coupon to verify that project yield <br />strengths were met during shear testing and that failure did not occur in the weld during peel <br />testing. When trial seams did not meet specifications, AMEC verified that the welding apparatus <br />was not used until two consecutive trial seams performed by the same technician /apparatus <br />combination met specifications. The trial seam test results for fusion seaming are presented in <br />AppendixG -2. Lonestar used one tensiometer and retained a spare Tensiometer during the <br />project. Figures 2 and 3 show the codes used to designate passing and failing test results. <br />6.2.3.2 Seaming Observations <br />AMEC personnel observed seams before, during and after welding. AMEC checked each seam <br />for adequate overlap prior to seaming and to verify that the seam area was clean and dry. <br />AMEC documented Lonestar personnel performing the seaming and the seaming equipment <br />used. Following the completion of seaming and routine repairs, AMEC checked the full length <br />of each seam to verify that no additional repairs were required. In the event that additional <br />repairs were needed, AMEC marked the location requiring repair on the geomembrane, <br />documented the location, and brought the repair area to the attention of Lonestar. Once <br />Lonestar made repairs, AMEC checked the repair location to verify completion to project <br />specifications. AMEC inspected all seams for quality and completion. AMEC personnel <br />conducted a final walk- through to verify completion of the entire geomembrane system and to <br />identify any additional damage that may have occurred during construction operations. Any <br />additional damage found during the final walk through was marked and documented by AMEC <br />and brought to the attention of Lonestar and repaired. <br />18 <br />