Laserfiche WebLink
August 2002 -39- 003 -2203 <br />6.1.3.1 Trial Seam Monitoring <br />Poly -Flex 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 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 shear. <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 shear 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 are 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 area was clean and dry. <br />Golder documented Poly -Flex personnel performing the seaming and the seaming equipment <br />. used. Following the completion of seaming and routine repairs, Golder checked the full length <br />r% 0RUD3W40 =era"0802U32W3.0W04740M.&C Golder Associates <br />