Laserfiche WebLink
documented the materials encountered during drilling and excavation. Documentation is <br /> included in well drilling/completion logs in Appendix A, the daily construction reports in <br /> Appendix B, and the Perimeter LFG Migration Control System record drawings in <br /> Appendix C. <br /> 3.1.4 Field Changes <br /> The following field changes were incorporated into the perimeter LFG extraction well <br /> construction: <br /> • All borings were relocated approximately 2.5 feet west of the surveyed design <br /> locations, to avoid encountering or damaging the edge anchor flap of the existing <br /> landfill base liner. <br /> 3.2 Multi-Level LFG Monitoring Probes <br /> 3.2.1 Description of Work <br /> TRG drilled and installed 35 LFG multi-level monitoring probes between September 24 <br /> and October 1, 2004. Construction of the 35 LFG multi-level monitoring probes, <br /> designated TGP-1 through TGP-35, was performed with air-rotary drilling technology. <br /> CDI drilled and installed the remaining 4 LFG multi-level monitoring probes between <br /> October 14 and October 15, 2004. Each probe was completed in accordance with the <br /> design drawings supplied by BAS. The major components of probe construction included <br /> the following: <br /> • Drilling of approximately 1,225 feet of vertical monitoring probe borings using <br /> 8-inch diameter air rotary drilling technology to complete 35 bore holes <br /> • Drilling of approximately 140 feet of vertical monitoring probe borings using fl- <br /> inch rotary auger drilling technology to complete 4 bore holes <br /> • Installation of approximately 2,534 linear feet of 0.75-inch diameter Schedule 40 <br /> PVC probe casing <br /> The total depth of monitoring probe borings logged was 1,363 linear feet,with an average <br /> boring depth of 35 feet. The newly installed LFG shallow, intermediate, and deep <br /> monitoring probe casings at each probe location are 10, 20, and 35 feet in depth, <br /> respectively. Refer to Appendix A for drilling/construction logs and Drawing 2 <br /> (Appendix C) for as-built monitoring probe locations. <br /> EMCON/OWT <br /> N:\_LANDFIL\AWI Austin Road-Forward\2004 SVE CQA\text\report\CQA report final.doc Rev.0,115105 <br /> 3-2 <br />