2012-11-15_REPORT - M1980244 (5)

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amec19 D) Soil Liner Fill (SLF) Soil liner fill (SLF) placement was performed in the areas shown on Figure 3. Subgrade was approved and moisture conditioned prior to placement using a tandem -axle water truck. Placement was performed using various CAT dozers.SLF material was hauled to the Mill Platform from the temporary SLF stockpile previously located from the East Cresson stockpile using CAT 40 -ton articulating haul trucks loaded by a CAT 980 front -end loader. Moisture conditioning of SLF material was performed in place using a tandem -axle water truck and compaction was achieved using a 10 -ton vibratory smooth drum compactor. Nuclear density testing, moisture verification, and depth check testing was performed with results within project specifications. Test locations were surveyed by Ames. Subgrade temperatures were monitored by an AMEC field representative prior to SLF placement. Fill material was not placed until the entire fill area was at or above 32 °F. Ambient temperatures remained above 32 °F during all shifts. Location This Week Cumulative Comments (tons) (tons) E.Cresson Clay Process 0 81,150 SLF processing is temporarily paused Total 0 81,510 SLF processing is temporarily paused E) Drain Cover Fill (DCF) Drain cover fill (DCF) placement performed in the area shown on Figure 6. The DCF was hauled from the processing area to the placement area using 40 -ton articulating haul trucks loaded by a CAT 988 front -end loader. The DCF was placed in a 2 -foot lift using various CAT dozers except where haul routes were established. Haul routes consisted of four -foot lifts to be spread into 2- foot lifts later. Laborers were present at all times during placement removing debris /sandbags and assisting the dozer operator with lift thickness. All DCF was placed on previously approved primary geomembrane. Ambient temperatures remained above 32 °F during all shifts. AMEC field representatives monitored the DCF placement constantly. Location This Week Cumulative Comments DCF Process 0 228,613 DCF processing is temporarily paused Total 0 228,613 DCF processing is temporarily paused II) Geosynthetics A) Geomembrane Installation Geomembrane installation continued in the area shown on Figure 4 performing deployment, seaming, and repair /QC activities. Approximately 216,622 square feet of 80mil LLDPE was deployed using a John Deere 544 front -end loader with spreader -bar attachments and a John Deere 200 excavator. Subgrade was inspected and approved by AMEC and Lonestar representatives prior to geomembrane deployment. Approximately 12,663 linear feet of seam was fusion welded using five fusion welding machine /welding technician combinations. Twenty -eight destructive test samples were marked during fusion seaming. All destructive tests performed were within project specifications. Non - destructive testing was performed for fusion welded seams. Repairs were performed using the extrusion welding method for all marked defects. Vacuum testing was performed for all extrusion welded seams and repairs. MEW Weekly Report WE 11.03.2012