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Final Construction Quality Assurance Report — WMU FU -13 Forward Landfill • Modified Proctor (ASTM D-1557): GLA's CQA Monitor performed 8 moisture -density relationships tests (ASTM D -1557A Proctor), on the low permeable clay liner soils. These reference curves were used in the field during compaction testing and compared to the moisture and compaction of the in situ clay liner after placement by the Contractor. These tests performed by GLA's CQA Monitor correspond to a frequency of one test per 1,675 cy of material, and satisfies the minimum required frequency of 1 test per 5,000 cy. Results of these tests are included in Appendix D. Atterberg Limits and Grain Size Analysis of Clay Liner Soils: GLA's CQA Monitor's testing of the low permeable clay liner soils included Atterberg limits determination (ASTM D-4318); and sieve analysis (ASTM D-422), including -200 wash (ASTM D-1140). The specified frequency for these tests was 1 test per 2,500 cy; GLA's CQA Monitor performed 6 Atterberg limits and 8 sieve analyses on the low permeable clay liner soils, at a testing frequency of 1 test per 2,233 cy and 1,675 cy, respectively. Results of these tests are included in Appendix D. Moisture and Density Testing: GLA's CQA Monitor recorded 81 passing nuclear method in- place unit weights (ASTM D-2922) and in-place moisture contents (ASTM D-3017) during the compaction of the low permeable clay liner soils. The total number of passing tests recorded • corresponds to a frequency of 1 test per 161 cy, which satisfies the minimum required frequency of 1 test per 250 cy. In addition, "grab" samples were collected at random moisture - density test locations for oven and micro wave moisture determination. The "grab" moisture samples are used to check the accuracy of the nuclear moisture -density gauge. It was determined that the oven moisture contents were within acceptable range of the nuclear gauge moisture contents. A total of 33 "grab" moisture contents (ASTM D-2216) were performed at the specified frequency of 1 per 406 cy, which satisfies the minimum test frequency of 1 test per every 2,500 cy of material placed. Areas that failed to meet the acceptable compaction and moisture content were reworked and retested until a passing result was achieved. Summaries of the field nuclear method moisture -density testing are included in Appendix D. Density Verification: To verify the accuracy of the in situ soil densities determined by the nuclear gauge, sand cone tests were performed, in conjunction with the nuclear gauge tests, at random locations. The wet density values obtained by the sand cone test were compared to the nuclear gauge results. Five sand cone tests were performed in the compacted low permeable clay liner soils at a frequency on 1 test per 2,680 cy, which satisfies the minimum specified frequency of 1 sand cone test per 5,000 cy. Results of the Sand Cone density tests are included • in Appendix D. 13 Geo-Losic ASSOCIATES