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P ase IVa Weekly Summary No. 56 Page 3 <br />Ames resumed slope recontouring of the Phase Nb PSSA 2H:1 V slope. <br />003-2203 <br />Ames hauled oversize material from the Phase IVb azea to an uncontrolled Fill site. <br />Phase Nc <br />Ames used a CAT D8, 992 loader, and several haul trucks to recontour, loadout, and remove <br />oversize and deleterious material from the saddle fill azea, south facing slope. <br />Ames hauled and stockpiled topsoil material to the north of the Phase Nc area. <br />Field Monitoring and Testing Activities <br />r <br />Golder observed construction activities associated with Phase N earthworks. All construction <br />materials and soil materials placed were verified as suitable, and construction methods were in <br />accordance with project specifications. Removal of oversized and deleterious material from all fill <br />azeas was observed. <br />Golder observed construction of the Phase Na Leak Detection Trench (LDT) for trench dimensions, <br />geomembrane welds, geotextile overlap, and LDF. The LDT was constructed in accordance with the <br />drawings and specifications. <br />Golder visually observed the placement of DCF in the Phase IVa area. Golder had one CQA monitor <br />per dozer to observe DCF placement. <br />Golder observed and tested placement of SLF in Phase IVa, completing twenty-six in-situ density <br />tests (tests and retests), three depth verification tests, and verified surface preparation. Prior to <br />geomembrane deployment, the SLF met the requirements of the specifications. <br />Golder observed construction of the Phase Nb/c Temporary Diversion Channel for proper materials, <br />thickness, grades, and compaction. Golder also observed the concrete pour for the temporary channel <br />headwall. The Temporary Diversion Channel activities were performed in accordance with the <br />drawings and specifications. <br />Golder observed geomembrane deployment, documenting ambient air temperature, panel <br />dimensions, seaming, tie-in overlap, and seam testing (trial seams, pressure, vacuum, and <br />destructive). Geomembrane placed in the Phase Na azea met the project specifications. <br />Golder observed Structural Fill (SF) placement in Phase IVb for lift thickness, moisture content, and <br />compactive effort. <br />Golder observed excavation of the UNK-11 working. No workings were remediated during this <br />reporting period. <br />Phase IVa 561une 1629.dw Golder Associates Inc. <br />