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June 24,2003 -3- 003-2203.7 <br />• • Golder monitored site grading, including slope re-contouring and fill placement, <br />lift thickness, moisture conditioning, temperatures, compactive effort, and use of <br />suitable material for SF. Golder performed CQA laboratory testing of grain size <br />and Atterberg limits. <br />• Golder visually monitored subgrade preparation to confirm that the subgrade <br />surface was unyielding, free of organic matter and other unsuitable materials, and <br />that the subgrade surface was compacted prior to Soil Liner Fill (SLF) <br />placement. <br />Golder visually monitored the placement and compaction of SLF including <br />observation of depth verification performed by Ames, particle size, moisture <br />conditioning, and compaction of the fill. Golder performed in-place density and <br />moisture content testing, and performed CQA laboratory testing of grain size, <br />moisture content, Atterberg limits, compaction, and permeability. Golder also <br />provided visual monitoring of the SLF surface preparation and moisture <br />conditioning for geomembrane deployment, including verification that the <br />surface was proof-rolled, compacted, and hand-worked so as to be free of <br />desiccation cracks, abrupt grade changes, and sharp stones or objects. Golder <br />also observed the backfill and compaction of the anchor trenches. <br />• Golder visually monitored the placement and compaction of Bedding Fill (BF) <br />on the Phase III ore slope below the lower geomembrane of the PSSA. Golder <br />provided full time visual observation of BF compaction and placement, surface <br />• preparation, and identification and removal of deleterious material prior to <br />subgrade acceptance. Golder performed CQA laboratory testing of grain size and <br />Atterberg limits. <br />Golder visually monitored the placement of Low Volume Solution Collection Fill <br />(LVSCF) in between the upper and lower geomembrane in the PSSA, including <br />verification of lift thickness, grade control, identification and removal of <br />deleterious materials, and verification that care was exercised in fill placement to <br />avoid geomembrane damage. Golder performed in-place nuclear <br />moisture-density testing of LVSCF areas within the PSSA sump, which serves as <br />the foundation for the upper geomembrane liner and High Volume Solution <br />Collection System (HVSCS) risers. Golder performed CQA laboratory testing of <br />grain size and Atterberg limits. <br />Golder visually monitored the installation of Low Volume Solution Collection <br />System (LVSCS) piping. Golder visually verified that pipes were installed to the <br />lines and grades shown on the plans. <br />Golder visually monitored the placement of Drain Cover Fill (DCF) under the <br />east and west PSSA end berms and above the upper geomembrane in the PSSA, <br />including verification of lift thickness and grade control, identification and <br />removal of deleterious materials, and verification that care was exercised in fill <br />placement to avoid geomembrane damage. Golder performed CQA laboratory <br />testing of grain size and Atterberg limits. <br />• • Golder visually monitored the placement of Select Drain Cover Fill (SDCF) <br />around the risers in the PSSA, including verification of lift thickness, extents of <br />z.:~oouxosaao~manrsseooo3wo3zzoz.o~oo.o~wx~p.eo~ Golder Associates <br />