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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 482 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 3 Portion SLF are summarized in Table 10. 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 and required. <br />4.2.3.3 Depth Verification <br />amec <br />Ames drilled a total of one - hundred and forty -seven (147) holes in the compacted SLF to <br />verify that the minimum 12 -inch compacted depth had been achieved. AMEC monitored the <br />SLF depth verification tests and documented results. Depth verification holes were filled <br />with fine bentonite material, as specified and required. All of the holes drilled into the SLF <br />had compacted depths greater than 12 inches. The testing frequency of 2.2 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 11. <br />4.2.4 Bedding Fill <br />Bedding fill was not used during the construction of the 2011 Phase 5 VLF OSA 2nd Portion. <br />4.2.5 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 />approximately 50 feet of each other during DCF placement. AMEC verified that wrinkles in <br />the geomembrane did not fold over, that PVC grade markers were placed on a maximum <br />50 -foot by 50 -foot grid and at grade breaks, and that material in the fill was suitable. AMEC <br />continuously inspected geomembrane during DCF placement, marked areas for repair, if <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 corn 23 <br />