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ameo <br />• <br />permeability of 1 x 10-e cm/sec. The permeability test results for the SLF are presented in <br />Appendix H-3 and summarized in Table 9. <br />4.2 Field Testing and Monitoring <br />AMEC observed all fill operations in the 2010 Phase 5 VLF to verify, when necessary, lift <br />thickness, adequate compaction, and acceptable moisture conditions. Holes made in the fill <br />during testing were backfilled and tamped with fine SLF materials. AMEC standardized <br />nuclear gauges at the start of each day's work according to ASTM D2922. <br />4.2.1 Underground Workings <br />AMEC monitored remediation of underground workings, including verification that <br />excavations were performed to minimum required dimensions, and that CP, CR, geogrid, <br />SF, FSB, and SSF were installed as specified. <br />• 4.2.1.1 Concrete Plug and Cemented Rockfill <br />AMEC observed placement and testing of CP material used within the footprint of the Phase <br />5 VLF. AMEC observed and documented testing of approximately 210 cubic yards of <br />concrete for slump, air entrainment, temperature, placement time and compressive strength. <br />Five tests were performed on slump. Five tests were performed on compressive strength for <br />a testing frequency of approximately one test per 42 cubic yards. This exceeded the <br />minimum specified testing frequency of one test per every 50 cubic yards. All tests met <br />compressive strength specification. The concrete observation and test results are <br />presented in Appendix N-4 and summarized in Table 18. <br />Ute Pass Concrete supplied CR. AMEC verified the CR provided by Ute Pass Concrete met <br />the project specifications. <br /> <br />AMEC Earth & Environmental, Inc. <br />2000 S. Colorado Blvd 2-1000 <br />Denver, CO 80222 <br />Tel 303-935-6505 <br />Fax 303-935-6575 www.amec.com <br />31