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WMU FU-03,WMU F-West Leachate Impoundment and Desilting Basin February 2004 Forward Landfill Job No.021605.03 ® Weather Conditions for Seaming Vector's CQA Monitor verified and documented that the weather conditions for seaming were within the project specifications and manufacturer's guidelines. Trial Seams Prior to seaming activities at the beginning of each day, and at a minimum 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 document 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 logs are presented within Appendix I. • Non-Destructive Seam Continuity Testing After seaming of the panels was completed, the Contractor's QC technician and Vector'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. Vector's CQA Monitor observed the non-destructive seam continuity testing and repairs performed by GSE 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. Vector Engineering, Inc. - 143E Spring Hill Drive- Grass Valley, CA 95945-(530)272-2448 -27-