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• <br />October 2004 <br />-7- <br />043 -2170 <br />2.0 SUMMARY OF EARTHWORK CONSTRUCTION <br />Earthworks activities associated with the Phase lVc OSA included the following: <br />• Underground workings remediation, including excavation, confirmatory drilling, <br />installation of CSB, FSB, CP, CR, SF, and geogrid; <br />• Secondary underdrain construction, including trench excavation, and installation of <br />UF, SSF, and geosynthetics; <br />• Leak .Detection system construction, including trench excavation; installation of <br />pipe, LDF, and geosynthetics; <br />• Surface water diversion channel construction, including installation of CSP, HDPE <br />pipe, structural concrete, and PBM; <br />• Site grading, including cut/fill and blasting; <br />• OSA subgrade preparation; <br />• SLF installation, placement and compaction, depth verification testing, and <br />preparation of SLF surface for geomembrane deployment; <br />• OSA composite liner system installation, consisting of geomembrane and SLF; <br />• Placement of HVSCS pipes; and <br />• DCF placement over previously- installed geomembrane. <br />Ames generally used the following equipment during the 2004 construction season: <br />• Caterpillar D6R Low Ground Pressure (LGP) Dozer; <br />• Caterpillar D6M LGP Dozer; <br />• Caterpillar D8R Wide Pad Dozer; <br />• Caterpillar D9R LGP Dozer; <br />• Caterpillar D8R Dozer; <br />• Caterpillar D9R Dozer; <br />• Caterpillar 426 Backhoe; <br />• Caterpillar 966 Loader; <br />• Caterpillar 980F Loader, <br />I: 4Ul7WOMCsn -QAYhIV 7IOU 32I70.O W.124&CutP4NeAx <br />Golder Associates <br />