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August 2002 -25- 003 -2203 <br />flexible -wall permeameter with back- pressure saturation and a constant rate of flow <br />(ASTM D5084, Method D). The fill was recompacted to the in -place density measured <br />during nuclear density tests and the corresponding moisture content (as determined from <br />oven -dried samples). The nuclear density value measured in the field was corrected for <br />coarse particles according to ASTM D4718. Laboratory tests yielded coefficients of <br />permeability for the CQA samples from 2.7 x 10'' cm/sec to 7.4 x 10 cm/sec, all of which <br />are less than the specified maximum permeability of 1 x 10 cm/sec. The permeability test <br />results for the SLF are presented in Appendix I -3 and summarized in Table 9. <br />4,1.6 Bulk Specific Gravity <br />Golder conducted one bulk specific gravity test of SLF at Golder's laboratory in Lakewood, <br />Colorado. Testing was performed in accordance with ASTM C127 for performing rock <br />corrections to the Proctor compaction tests. <br />4.2 Field Testing and Monitoring <br />Golder observed all fill operations in the Phase IVa Area to verify, when necessary, lift <br />thickness, adequate compaction, and acceptable moisture conditions. When Golder performed <br />nuclear density testing, holes made in the fill during testing were filled by tamping SIX into the <br />holes. Golder standardized nuclear gauges at the start of each day's work according to <br />ASTM D2922. <br />4-2.1 Underground Workings <br />Golder monitored remediation of underground workings, including verification that <br />excavations were performed to minimum required dimensions, and that CP, CR, geogrid, SF, <br />and SSF were installed as specified. <br />.,00%2203\04o Cadtap oMIM3.DM,0 74OW -d« Golder Associates <br />