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WMU FLI-03, WMU F -West Leachate Impoundment and Desilting Basin February 2004 <br />Forward Landfill Job No. 021605.03 <br />�% Table 3 — Subgrade Fill Laboratory Testing Summary <br />Upon completion of the subgrade fill on the slopes, the Contractor prepared the surface <br />for geosynthetics placement by smooth drum rolling the area. Vector's CQA Monitor <br />observed the smooth drum rolling procedure and advised the Contractor of areas where <br />SAMPLE <br />NUMBER <br />DATE <br />SOIL <br />DESCRIPTION <br />MODIFIED <br />PROCTOR <br />ATTERBERG <br />LIMIT <br />GRAIN SIZE <br />Pmax <br />W% LL PL PI 3'1 1/2" <br />Nb <br />Spec�ticatlsans <br />Nle <br />✓ <br />N/ l lA tYl <br />NIA <br />lf <br />max, aif <br />SF -1 <br />9/4/03 <br />Lt. Brown Silty clay <br />117.4 <br />15.2 <br />32 <br />19 <br />13 <br />100.0% <br />< 1/2" <br />SF -2 <br />9/5/03 <br />Lt. Brown Silty clay <br />114.2 <br />16.9 <br />34 <br />1 19 <br />15 <br />100.0% <br />< 1/2" <br />SF -3 <br />9/8/03 <br />Lt. Brown Silty clay <br />116.3 <br />15.1 <br />30 <br />21 <br />9 <br />1 100.0% <br />< 1/2" <br />SF -4 <br />9/11/03 <br />Lt. Brown Silty clay <br />115.8 <br />15.9 <br />34 <br />21 <br />13 <br />100.0% <br />< 1/2" <br />SF -5 <br />9/15/03 <br />Lt. Brown Silty clay <br />114.7 <br />16.5 <br />32 <br />21 <br />11 <br />100.0% <br />< 1/2" <br />ridges, rough areas, and/or voids were present so that these areas could be reworked. <br />Once the surface preparation was complete, the area was approved for geosynthetics <br />placement. A subgrade acceptance form was prepared by Vector's CQA Monitor and <br />signed by GSE prior to geosynthetic placement. Subgrade acceptance forms are <br />presented in Appendix E. <br />4.3 Clay Liner <br />A 2 -feet thick clay liner layer was placed on the floor of WMU FU -03. Approximately <br />21,000 cy of material was utilized to construct the clay liner. The material was <br />transported from the clay stockpile located directly east of the cell using CAT 633 <br />scrapers. The compaction of the liner soils was performed using a CAT 825 sheepsfoot <br />compactor. As each lift was placed, the CQA Monitor verified that the surface of the lift <br />was scarified and not smooth to assure that no distinct layers developed within the clay <br />liner and that the specified lift thickness was achieved. <br />Vector's CQA Monitor performed in-place density tests during clay liner construction, <br />using the nuclear density gauge. The clay liner was placed at a minimum of 90 percent of <br />0 <br />Vector Engineering, Inc. - 143E Spring Hill Drive - Grass Valley, CA 95945 - (530) 272-2448 <br />-12- <br />