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2.0 SUMMARY OF EARTHWORK CONSTRUCTION <br />Earthworks activities associated with the 2011 Phase 5 VLF OSA 3 Portion included the <br />following: <br />• Site grading, including cut/fill and blasting of non - rippable bedrock; <br />• Leak Detection System (LDS) construction, including trench excavation, <br />installation of pipe, placement of LDF, and geosynthetics installation; <br />• Subgrade preparation; <br />• SLF installation, placement and compaction, depth verification testing, <br />and preparation of SLF surface for geomembrane deployment; <br />• OSA primary liner system installation; <br />• DCF placement above the primary geomembrane layer; <br />• Placement of HVSCS piping; and <br />ame0 <br />• Underground workings remediation, including excavation and installation <br />of geogrid and SSF. <br />Ames generally used the following equipment during construction: <br />• Caterpillar D6 Low Ground Pressure (LGP) Dozer; <br />• Caterpillar D7 LGP Dozer; <br />• Caterpillar D8 LGP Dozer; <br />• Caterpillar D9 LGP Dozer; <br />• Caterpillar D9 Dozer; <br />• Caterpillar D10 Dozer; <br />• Caterpillar 279 Skidsteer; <br />• Bobcat Skidsteer; <br />• Caterpillar 950 Loader; <br />• John Deere 544 Loader; <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 7 <br />