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• ameo <br />testing. When trial seams did not meet specifications, AMEC verified that the welding <br />apparatus was not used until two consecutive trial seams performed by the same <br />technician/apparatus combination met specifications. The trial seam test results for <br />extrusion and fusion seaming are presented in Appendix K-2 and L-2 for the secondary and <br />primary geomembranes, respectively. Lone Star used one tensiometer during the project. <br />Tensiometer certifications are presented in Appendix N. Figures 3 and 4 show the codes <br />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 <br />seam for adequate overlap prior to seaming and to verify that the seam area was clean and <br />dry. <br />AMEC documented Lone Star personnel performing the seaming and the seaming <br />equipment used. Following the completion of seaming and routine repairs, AMEC checked <br />the full length of each seam to verify that no additional repairs were required. In the event <br />that additional repairs were needed, AMEC marked the location requiring repair on the <br />geomembrane, documented the location, and brought the repair area to the attention of <br />Lone Star. Once Lone Star made repairs, AMEC checked the repair location to verify <br />completion. 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 <br />to identify any additional damage that may have occurred during construction operations. <br />AMEC recorded observations made during seaming. For the secondary geomembrane <br />layer, the fusion-welding summary is presented in Appendix K-3, and the extrusion-welding <br />summary is presented in Appendix K-4. For the primary geomembrane layer, the <br />fusion-welding summary is presented in Appendix L-3, and the extrusion-welding summary <br />is presented in Appendix L-4. <br />• <br />AMEC Earth & Environmental, Inc. <br />2000 S. Colorado Blvd 2-1000 <br />Denver, CO 80222 <br />Tel 303-935-6505 <br />Fax 303-935-6575 www.amec.com 53