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WMU FU-06 November 2006 <br /> Forward Landfill Project No.021605.07 <br /> ® When the Contractor and CQA Monitor determined that the desired thickness and <br /> grade had been accomplished, the top of the compacted clay was fine graded using a <br /> road grader and was prepared to a smooth finish using a smooth drum compactor. <br /> Vector's CQA Monitor observed the smooth drum rolling procedure and advised the <br /> Contractor of areas where ridges or rough areas were present so that these areas <br /> could be reworked. The surface of the compacted clay liner was also observed for <br /> potential desiccation cracking. Once the surface preparation was complete, the area <br /> was approved for geomembrane placement. A subgrade acceptance form was <br /> prepared by Vector's CQA Monitor and signed by GSE prior to geomembrane <br /> placement. Subgrade acceptance forms are presented in Appendix E. <br /> Survey verification of the liner thickness and grade was performed by Quartaroli & <br /> Associates and reviewed by the CQA Officer prior to geosynthetics placement. <br /> ® 4.4 LCRS Granular Drainage Layer and Coarse Gravel <br /> The granular drainage layer was placed on the floor of WMU FU-06 as a leachate <br /> collection and removal system and the coarse gravel fill was placed in the lateral <br /> trenches and sump of WMU FU-06. <br /> The granular drainage layer material and coarse gravel fill was obtained from an <br /> off-site source. The granular drainage gravel was placed by dumping the gravel in <br /> a pile and pushing the material outward over the cushion geotextile with a low- <br /> ground pressure (LGP) dozer. Vector's CQA Monitor continuously observed the <br /> placement of these materials to ensure no damage occurred to the underlying <br /> geosynthetics and that no large wrinkles developed. Any observed damage was <br /> marked and repaired. <br /> Samples of the granular drainage material and coarse gravel were obtained and <br /> ® sieve analyses and hydraulic conductivity tests were conducted. Vector's CQA <br /> Vector Engineering, Inc. • 143E Spring Hill Drive•Grass Valley,CA 95945•(530)272-2448 <br /> -17- <br />