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Stage 1A Partial Final Closure February 2006 Forward Landfill Project No.021605.06 ® 3-inch sieve. The liquid limit and plasticity index for the compacted earthfill material ranged from 22 to 34 and 3 to 14, respectively. A summary of the test results is included in Table 2. Detailed results of the compacted earthfill material testing are included in Appendix C. Modified Proctor (ASTM D-1557): Vector's CQA Monitor performed thirty six (36) moisture-density relationships (ASTM D-1557), which corresponds to a frequency of 1 per 5,000 cy. A summary of test results is shown in Table 2. Results of the tests are included in Appendix C. Moisture and Density Testing: Vector's CQA Monitor recorded 720 in-place unit weight (ASTM D-2922) and in-place moisture content (ASTM D-3017) tests during the compaction of the compacted earthfill soil materials. The total number of passing tests recorded corresponds to a frequency of 1 per 250 cy, ® which satisfies the minimum required frequency of 1 per 500 cy. Areas that failed to meet the acceptable compaction were reworked and/or replaced and retested until a passing result was achieved. Summaries of the field moisture/density testing are tabulated in Appendix C. Density Verification: To verify the in situ density by the nuclear gauge, the wet density values obtained by the nuclear gauge were compared to the wet density determined from the sand cone tests. Seventy two (72) sandcone tests were conducted at a frequency on 1 per 2,500 cy, which meets the specified frequency of 1 per 2,500 cy. Results of the density testing conducted by the sand cone method are included in Appendix C. Hydraulic Conductivity: Eighteen (18) in situ soil samples were collected during placement and compaction of the compacted earthfill and tested for permeability Vector Engineering, Inc. • 143E Spring Hill Drive•Grass Valley, CA 95945•(530)272-2448 -10-