2009-12-11_REPORT - M1980244 - Laserfiche WebLink

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amen Earth 8 Environmental structural fill and a two -layer geogrid cap be placed, extending 25 feet in all directions from the location. A Remediation plan was submitted by John Lupo. C) Lateral/Slot Remediation No work performed during the week. IV) Storm Water Management Structures A) Control Structures No work performed during the week. B) Best Management Practices Best Management Practices are being observed throughout the Phase 5 VLF Project. Storm water controls were maintained throughout the week. Precipitation not substantial throughout the week. V) VLF Soil Liner Fill A) Phase IVa Geomembrane Re- certification Soil liner fill placed last week for the Phase IVa geomembrane re- certification was protected using visqueen plastic. The plastic was removed prior to geomembrane installation in the area. VI)VLF Geosynthetics A) Exposure of the Phase IVc Geomembrane Re- certification Area After the drain cover fill placement was complete, supporting the slope the north, the Phase IVc geomembrane exposure continued. This was performed to remove the support buttress in the area. The material was removed using a John Deere 35D excavator feeding a CAT 330 excavator. The CAT 330 excavator loaded the removed material into a 40 -ton articulating haul truck. The material was stockpiled just south of the excavation. An AMEC representative was present at all times during geomembrane exposure. B) Phase IVa Re- certification Geomembrane Installation Geomembrane deployment at the Phase IVa re- certification was performed replacing the existing geomembrane designated in the Re- certification Memo. The subgrade surface was inspected and found to be acceptable prior to each panel deployment. Density, permeability, moisture, and depth testing was performed previously in the area (11/3/2009). Eight panels of 100 mil single sided textured geomembrane were deployed for an approximate total square footage of 9,162. Two fusion trial seams were performed during the deployment of geomembrane with passing results. Sixteen seams were fusion welded for an approximate total of 609 linear feet. Two destructive test samples were marked during fusion seaming and tested with passing results. Twenty one seam pressure tests were performed with passing results. Fifteen repairs were made using the extrusion welding method. Three extrusion trail welds were performed during repair activities with passing results. Vacuum testing of all repairs was performed with passing results. AMEC representatives were present at all times during geomembrane installation activities. The Phase IVa re- certification anchor trench was backfilled using a John Deere 35D excavator and a jumping jack compactor. The material was placed in 12" loose lifts and compacted using the jumping jack compactor. VLF Weekly Report WE 11.14.09.D.doc