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<br />U <br /> <br />June 24, 2003 -26- <br />4.1.5 Permeability Tests <br />003-2203.7 <br />Golder conducted permeability tests of SLF. Golder conducted eight permeability tests of <br />re-compacted samples of SLF at Golder's laboratory in Lakewood, Colorado. The testing frequency <br />(approximately one test per 3,827 cubic yards) exceeded the minimum specified testing frequency of <br />one test per 5,000 cubic yards. Testing was performed with aflexible-wall permeameter with <br />back-pressure saturation and a constant rate of flow (ASTM D5084, Method D). The fill was <br />re-compacted to the in-place density measured during nuclear density tests and the corresponding <br />moisture content (as determined from oven-dried samples). The nuclear density value measured in <br />the field was corrected for coarse particles according to ASTM D4718. Laboratory tests yielded <br />coefficients of permeability for the CQA samples from 2.8 x 10'~cm/sec to 1.4 x 10'scm/sec, all of <br />which 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 Graviri <br />Golder conducted a bulk specific gravity test of SLF at Golder's laboratory in Lakewood, Colorado. <br />Testing was performed in accordance with ASTMC127 for performing rock corrections to the <br />Proctor compaction tests. <br />4.2 Field Testing and Monitoring <br />Golder observed al] fill operations in the Phase Nb PSSA to verify, when necessary, lift thickness, <br />adequate compaction, and acceptable moisture conditions. Holes made in the fill during testing were <br />backfilled and tamped with fine SLF materials. Golder standardized nuclear gauges at the start of <br />each day's work according to ASTM D2922. <br />4.2.1 Underground Workings <br />Golder monitored remediation of underground workings, including verification that excavations were <br />performed to minimum required dimensions, and that CP, CR, geogrid, SF, FSB, and SSF were <br />installed as specified. <br />1:\00\E20J\M00\FUICertPS5A060J\OOJ330J.Oi00.0iJ~3Repdoa Golder Associates <br />