Laserfiche WebLink
4.2 Field Testing and Monitoring <br />AMEC performed five (5) CQA standard Proctor compaction tests of SLF. The testing <br />frequency (approximately one test per 1,028 cubic yards) exceeded the minimum specified <br />testing frequency of one test per 4,000 cubic yards. The SLF compaction test results met <br />project specifications and are presented in Appendix H.2 and summarized in Table 7. CQC <br />Proctor tests were not included in the Proctor testing frequency.The SF and SSF fills <br />contained more than 30 percent above the % -inch sieve. Per Specification 2200 Section <br />3.06, SF containing more than 30 percent above the 3 / -inch sieve is placed using a method <br />specification and cannot be tested using a standard Proctor (due to the high rock content). <br />4.1.5 Permeability Tests <br />amec° <br />AMEC conducted permeability tests of SLF. AMEC conducted three (3) permeability tests of <br />re- compacted samples of SLF. The testing frequency (approximately one test per <br />1,713 cubic yards) exceeded the minimum specified testing frequency of one test per <br />4,000 cubic yards. Testing was performed with a flexible -wall permeameter, during material <br />processing, with back - pressure saturation and a constant rate of flow (ASTM D5084, <br />Method D). The fill was re- compacted to 95 percent of the standard Proctor (ASTM D698- <br />07) maximum dry density at the optimum moisture content (as determined from oven -dried <br />samples). Laboratory tests yielded coefficients of permeability for the CQA samples from <br />2.5 x 10 - ' cm /sec to 7.8 x 10 -8 cm /sec, all of which are less than the specified maximum <br />permeability of 1 x 10 cm /sec. The permeability test results for the SLF met project <br />specifications and are presented in Appendix H.3 and summarized in Table 7. <br />AMEC observed earthworks fill operations in the Process Solution Enhancement System to <br />verify, when necessary, lift thickness, adequate compaction, and acceptable moisture <br />conditions. Holes made in the fill during testing were backfilled and tamped with fine <br />bentonite materials. AMEC standardized nuclear gauges at the start of each day's work <br />according to ASTM D2922. <br />AMEC Environment & Infrastructure, 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 18 <br />