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4.2.3 Soil Liner Fill <br />4.2.3.1 Field Monitoring <br />4.2.3.2 Moisture - Density Test Results <br />ame9 <br />The majority, 94.9 percent, of the SF contained more than 30 percent by weight larger than <br />3/4-inch particle size, and was placed by method specification (per Specification 2200 <br />Section 3.06). <br />AMEC verified that the SF maximum particle size of the fill did not exceed 24 inches, and <br />that lifts were no thicker than one and one -half times the maximum particle size. When SF <br />was placed for slope reduction, AMEC verified that Ames scarified in -situ materials prior to <br />fill placement. AMEC verified that Ames made a minimum of four passes with the SDVR <br />compactor. <br />Field testing included monitoring of placement and preparation of SLF for geomembrane <br />deployment, testing in -place moisture and density with a nuclear gauge, and monitoring <br />depth verification to project specifications. <br />AMEC observed SLF placement to verify lift thickness, adequate compaction, acceptable <br />moisture conditions, final compacted thickness, and suitability for geomembrane <br />deployment. AMEC identified angular particles on the fill surface, ruts, and desiccation <br />cracks, and brought these features to the attention of Ames for repair. Ames completed <br />repairs by placing fines from their SLF processing plant or from temporary piles of fine SLF <br />to smooth and re- compact the fill surface in areas that were observed to be rough or <br />inadequate, as discussed in Section 2.6. AMEC and Lone Star approved the final surface of <br />the SLF within the Phase 5 VLF 3rd Portion prior to geomembrane deployment. <br />AMEC performed a total of 227 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 />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 22 <br />