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• <br />r 1 <br />LJ <br />r1 <br />U <br />2002 -39- <br />6.1.3.1 Trial Seam Monitoring <br />003-2203 <br />Poly-Flex performed trial seams to monitor the performance of the seaming appazatus and <br />operator under actual site conditions. Each welding operator and his appazatus produced trial <br />seams prior to the beginning of each day's seaming operation and in the event that devices were <br />disconnected from power and re-energized. <br />Poly-Flex cut 1-inch wide samples {coupons) from each trial seam and tested the coupons with <br />a field tensiometer. Poly-Flex tested each double wedge fusion trial seam twice for peel <br />adhesion (peel) and once for bonded seam strength (shear). Poly-Flex conducted peel tests on <br />fusion welds on both the inner and outer tracks of each peel coupon. Poly-Flex tested each <br />extrusion trial seam twice for peel and once for sheaz. <br />Golder personnel observed the testing of trial seam samples and documented test results. <br />Golder observed the tensile testing of each trial seam coupon to verify that project yield <br />strengths were met during sheaz testing and that failure did not occur in the weld during peel <br />testing. When trial seams did not meet specifications, Golder 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 extrusion <br />and fusion seaming are presented in Appendix K-3. Poly-Flex used two tensiometers during <br />the project. Tensiometer certifications aze presented in Appendix K-4. Figures 3 and 4 show <br />the codes used to designate passing and failing test results. <br />6.1.3.2 Seaming Observations <br />Golder personnel observed seams before, during and after welding. Golder checked each seam <br />for adequate overlap prior to seaming and to verify that the seam azea was clean and dry. <br />Golder documented Poly-Flex personnel perfomting the seaming and the seaming equipment <br />used. Following the completion of seaming and routine repairs, Golder checked the full length <br />~wo~zzo3waoo~cma~oaoaoozzzm.oaoo.on~aan ao~ Golder Associates <br />