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Final Construction Quality Assurance Report — WMU FU -13 Forward Landfill conformance with the project Specifications, and that the seam area was clean, free of is moisture, debris or any foreign material that could cause leaks or irregularities during the seaming process. Weather Conditions for Seaming: GLA's CQA Monitor observed and documented that the weather conditions for seaming were within the project specifications and manufacturer's recommended guidelines. High temperatures over the specified installation temperature were encountered during installation on July 4, 2013. Per Specification Section 02778.3.3.E.12, Comanco increased the number of pre -welds and provided a letter stating that the integrity of the seams was not affected by the higher temperature. This pre -weld temperature letter is included in Appendix I. Trial Seams: Prior to seaming activities at the beginning of each day, and at a minimum of once during the middle of the shift, a trial seam (start-up trial weld) was prepared for each of the wedge and extrusion welders used for that shift. The seaming technicians prepared a test specimen and marked the sample with the machine number, machine temperature, date, time, and operator name. The shear and peel tests were performed in the field in accordance with ASTM D-6392. If the • start-up weld sample failed to meet the project specifications, the welding technician and supervisor were notified and advised to take corrective action or put that machine out of service. The CQA monitor documented the trial welds, which included the date, time, temperature, machine number, technician, and results of the shear and peel testing. The geomembrane start-up trial weld Trial Weld Logs are presented in Appendix I. Non -Destructive Seam Testing: After seaming of the panels was completed, the Contractor's QC technician and GLA's CQA Monitor inspected the seams and panels for defects. The QC technician marked defective seams or tears, holes, non -dispersed resin beads or other defects for repair. The air pressure test method was used for double wedge -welded seams and the vacuum box for extruded seams for seam continuity testing. GLA's CQA Monitor observed the non-destructive seam continuity testing and repairs performed by Comanco to ensure that the seams were satisfactory. The air pressure test logs for the wedge -welded seams are presented in the seaming log in Appendix I. Destructive Seam Testing: General - In addition to non-destructive testing, destructive samples were obtained at random locations to evaluate seam strength and integrity. The samples were tested for shear strength and peel strength (ASTM D6392). , 24 Geo—Logic ASSOCIATES