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2002 -28- 003-2203 <br />. slope reduction, Golder verified that Ames scarified in-situ materials prior to 811 placement. <br />Golder verified that Ames made a minimum of four passes with the smooth drum vibratory <br />compactor. <br />4.2.6 Soil Liner Fill <br />Field testing included monitoring of placement and prepazation of SLF for geomembrane <br />deployment, testing in-place moisture and density with a nucleaz gauge, and monitoring depth <br />verification. <br />4.2.6.1 Field Monitoring <br />Golder observed SLF placement to verify lift thickness, adequate compaction, acceptable <br />moisture conditions, final compacted thickness, and suitability for geomembrane deployment. <br />• Golder identified angular particles on the fill surface, ruts, and desiccation cracks, and brought <br />these features to the attention of Ames for repair. Ames laborers placed fines from screened <br />Portland tailing below Pad No. 3 over rough or granulaz areas of the fill surface, as discussed in <br />Section 2.6. Golder and Poly-Flex approved the fmal surface of the SLF prior to geomembrane <br />deployment. <br />4.2.6.2 Moisture-Density Test Results <br />Golder performed a total of 120 in-place moisture-density tests of SLF. Golder compazed <br />results of the field moisture content and density tests to the Proctor dry density and optimum <br />moisture content values of material with similar gradation and plasticity characteristics. Proctor <br />dry density and optimum moisture content values for samples with greater than ten percent plus <br />three-quarter-inch material were corrected according to ASTM D4718 to facilitate direct <br />comparison to nuclear density values. The moisture-density testing frequency of approximately <br />one test per 441 cubic yards exceeded the minimum specified testing frequency of one test per <br />• 500 cubic yards. Nuclear density tests performed for the OSA aze summarized in Table 13. A <br />rwmzzu~wnoo~cmx~ooeus~oo~zzoa.onoooa~am,na== Golder ASSOCIates <br />