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WMU FU-08 October 2008 <br /> Forward Landfill Project No.021605.08 <br /> Modified Proctor (ASTM D-1557): Vector's CQA Monitor performed four (4) <br /> moisture-density relationships (ASTM D-1557) for compaction references, which <br /> corresponds to a frequency of one per 5,000 cy and satisfies the required frequency <br /> of 1 per 5,000 cy. A summary of test results is shown in Table 5. Results of these <br /> tests are included in Appendix D. <br /> Moisture and Density Testing: The CQA Monitor recorded 80 passing in-place unit <br /> weights (ASTM D-2922) and in-place moisture contents (ASTM D-3017) during the <br /> compaction of the LPSL. The total number of passing tests recorded corresponds to <br /> a frequency of 1 per 250 cy, which satisfies the minimum required frequency of 1 <br /> per 250 cy. In addition, grab samples were collected at the density test locations for <br /> oven moisture determination. The oven moisture contents were compared to the <br /> nuclear gauge moisture contents. The oven moisture contents were within <br /> acceptable range of the nuclear gauge moisture contents. Oven moisture contents <br /> (ASTM D-2216) were performed at the specified frequency of I per 2,500 cy. Areas <br /> that failed to meet the acceptable compaction were reworked and/or replaced and <br /> retested until a passing result was achieved. Summaries of the field <br /> moisture/density testing and test locations are included in Appendix D. <br /> Density Verification: To verify the in situ density by the nuclear gauge, the wet <br /> density values obtained by the nuclear gauge were compared to the wet density <br /> determined from the sand cone tests. Four (4) sand cone tests were conducted at a <br /> frequency on 1 per 5,000 cy, which meets the specified frequency of 1 per 5,000 cy. <br /> Results of the density testing conducted by the sand cone method are included in <br /> Appendix D. <br /> Hydraulic Conductivity: Eight (8) in situ soil samples were collected during <br /> placement and compaction of the LPSL and tested for permeability in Vector's Grass <br /> Valley laboratory. Falling head, rising tail water tests were performed in the <br /> Vector Engineering, Inc. • 143E Spring Hill Drive•Grass Valley, CA 95945•(530)272-2448 <br /> -14- <br />