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WMU FU-05 November 2006 <br /> Forward Landfill Project No.021605.07 <br /> ® method was used for double wedge-welded seams and the vacuum box for extruded <br /> seams for seam continuity testing. Vector's CQA Monitor observed the non- <br /> destructive seam continuity testing and repairs performed by GSE to ensure that <br /> the seams were satisfactory. The air pressure test logs for the wedge-welded seams <br /> are presented in the seaming log in Appendix I. <br /> Destructive Seam Testing: General - In addition to non-destructive testing, <br /> destructive samples were obtained at random locations to evaluate seam strength <br /> and integrity. The samples were tested for shear strength and peel strength (ASTM <br /> D6392). <br /> Location and Frequency — Vector's CQA Monitor selected the locations of <br /> approximately one sample per 500 linear feet of seam. Within the Central Portion <br /> of WMU FU-06, a total of 64 destructive samples were collected and tested from <br /> ® approximately 30,920 linear feet of seam, resulting in a frequency of 1 test per 483 <br /> linear feet. Additional destructive samples were obtained if there were failures or if <br /> there was an indication of overheating, contamination, or other adverse conditions. <br /> Sampling Procedure - GSE cut the samples as directed by Vector's CQA Monitor. <br /> Vector's CQA Monitor observed the cutting and assigned sample numbers, and <br /> reviewed sample information (sample number, seam number, seaming apparatus, <br /> operator identification, location, date, and time welded). Vector's CQA Monitor <br /> recorded the samples collected and sample location on the panel layout drawing. <br /> The holes in the geomembrane resulting from destructive seam sampling were <br /> covered by GSE immediately after sampling. The repair was completed by placing <br /> an extrusion welded patch of the same material. The continuity of the new seams <br /> in the repaired area was tested with the same procedure as described in the vacuum <br /> ® box testing procedures discussed previously. <br /> Vector Engineering, Inc. • 143E Spring Hill Drive•Grass Valley, CA 95945-(530)272-2448 <br /> -29- <br />