2003-02-11_REVISION - M1980244 - Laserfiche WebLink

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'Phase IVb Weekly Summary No. 9 Page 2 003-2203 On January 20a', a Caterpillar D9 wide pad dozer damaged the lower 100 mil single sided textured geomembrane in the Phase IV PSSA neaz panel 354, creating puncture and scratch penetration damage to the geomembrane. Ames used a Caterpillar 330 excavator on January 20a' and 21s` to remove LVSCF from the area where the geomembrane damage occurred. As Polyflex was not onsite, CC&V performed temporary geomembrane repairs on these areas on January 23`d, 2003. The temporary repairs were surveyed and will not be covered with LVSCF until Polyflex returns to perform certifiable repairs and tests on the damaged geomembrane area. Ames performed SSF backfill on underground working UG-315, and performed SF backfill above the previously placed geogrid at UG-316. Phase IVc Ames placed a Concrete Plug (CP) at UG-304. Ames placed Cemented Rockfill (CR) at UG-498, UG- 504 and UG-269. Ames placed geogrid at UG-504. Ames placed Structural Fill (SF) over previously remediated workings at UG-234a, UG-236, UG-498, and UG-504. Ames performed excavations at workings UG-304, UG-504, UG-269, and UG-274 in preparation of geogrid placement. Ames performed local cut to fill of Structural Fill (SF) material down slope to the temporary stockpiles above and below the old Connolly haul road elevation. Field Monitoring and Testing Activities Golder observed construction activities associated with Phase N earthworks. All construction materials and soil materials placed were verified as suitable, and construction methods were in accordance with project specifications. Removal of oversized and deleterious material from all fill areas was observed. Golder observed Structural Fill (SF) placement in Phase iV for materials, lift thickness, moisture content, and compactive effort. Golder obtained samples of SF for laboratory index testing. Materials supplied met project specifications. Golder observed placement of SF, geogrid, CP and CR for underground working remediation. These materials were placed in accordance with the drawings and specifications into excavated or open underground workings. CP and CR was observed full-time for correct aggregate size, QC observation, cement ratio calculations, and placement and consolidation monitoring. Golder provided full-time observation of LVSCF placement for correct material, road thickness, placement thickness, drop height, taper, and liner damage. LVSCF was placed in accordance with the specifications. Golder obtained samples of LVSCF for laboratory index testing. Materials supplied met project specifications. Laboratory Tests Golder obtained four samples of LVSCF (LVSCFb-09, 10, 11, and 12) for laboratory testing. Golder obtained one sample of Structural Fill in the Phase IVc area (SFc-OS) for laboratory index testing. The samples tested met the requirements of the specifications and results are presented in Attachment B. PhaaelW 9Jan19-Feb01, 2003 doc Golder Associates lnc.