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ameO <br />inadequate, as discussed in Section 2.5. AMEC and Lone Star approved the entire final <br />surface of the SLF within the Phase 5 VLF 2nd Portion prior to geomembrane deployment. <br />4.2.3.2 Moisture - Density Test Results <br />AMEC performed a total of 115 in -place moisture - density tests of SLF. AMEC compared <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. <br />Proctor dry density and optimum moisture content values for samples with greater than ten <br />percent plus 3/4 -inch material were corrected according to ASTM D4718 to facilitate direct <br />comparison to nuclear density values. The moisture - density testing frequency of <br />approximately one test per 448 cubic yards exceeded the minimum specified testing <br />frequency of one test per 500 cubic yards. Nuclear density tests performed for the 2011 <br />Phase 5 VLF OSA 2nd Portion SLF are summarized in Table 9. Any failing areas were <br />reworked, re- compacted, and retested to meet specifications. The number of retests was <br />not used to determine the testing frequency. Holes made in the SLF during testing were <br />filled by tamping fine bentonite material into the holes, as specified. <br />4.2.3.3 Depth Verification <br />Ames drilled a total of seventy -three (73) holes in the compacted SLF to verify that the <br />minimum 12 -inch compacted depth had been achieved. AMEC monitored the SLF depth <br />verification tests and documented results. Depth verification holes were filled with fine <br />bentonite material and water, as specified. All of the holes drilled into the SLF had <br />compacted depths greater than 12 inches. The testing frequency of 2.3 holes per acre <br />exceeded the minimum specified testing frequency of two measurements per acre. The SLF <br />depth verification results met project specifications and are presented in Table 10. <br />4.2.4 Drain Cover Fill <br />AMEC provided visual monitoring of DCF placement. One AMEC monitor and at least two <br />Ames laborers were present monitoring each dozer, unless two dozers were within <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 />22 <br />