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WMU FU-08 October 2008 Forward Landfill Project No.021605.08 5.3.3.2 Repair Procedures and Testing The repairs were conducted in accordance with the applicable method specified within the project specifications. Vector's CQA Monitor reviewed each repair and that subsequent testing was performed. Repairs and testing are documented in the repair log presented in Appendix I. 5.3.4 Leak Location Survey A leak location survey was conducted twice during the construction of WMU FU-08. The first leak location survey was performed upon completion of the geomembrane installation and prior to placement of the cushion geotextile and LCRS drain gravel. The second leak location survey was performed upon completion of the operations layer placement. Vector Engineering conducted the leak location survey on both the bare geomembrane and after the drainage gravel and operations layer were completed. During the first leak location survey, no holes were found in the geomembrane liner. However, two irregularities (rocks) in the subgrade were identified. The rocks beneath the liner were removed, the geomembrane was repaired, and non destructive testing was conducted. No holes were found during the second leak location survey, conducted after the operations layer was placed. A complete report of the procedure and findings of the leak location surveys are included in Appendix J. 5. eotextile 5.4.1 General A 7-oz/yd2 geotextile was used as a separation layer between the LCRS granular drainage material and the operations layer and in the LCRS trenches to encapsulate the gravel fill and HDPE piping. A 12-oz/yd2 geotextile was used as a cushion layer on the floor between the geomembrane and LCRS granular drainage material. Vector Engineering, Inc. • 143E Spring Hill Drive•Grass Valley, CA 95945•(530)272-2448 -30-