2010-05-29_REVISION - M1980244

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 5/29/2010
• Doc Name: VLF Earthworks Field Monitioring and summary weekly report
• Media Type: D
• Archive: No

•
amec
Earth & Environmental
V) VLF Geosynthetics
Geomembrane installation within the Phase 5 VLF continued throughout the week, performing
deployment, seaming, and repair /QC activities. Geomembrane installation was performed in the area
shown in Figure 4. Approximately 208,525 square feet of 100mil LLDPE single sided textured was
deployed using a John Deere 200 excavator and a John Deere 544 front -end loader with spreader -bar
attachments. Subgrade was inspected and approved by AMEC and Lonestar representatives prior to
geomembrane deployment (see Figure 4). Approximately 11,523 linear feet of seam was fusion
welded during deployment using three fusion welding machines. Twenty -two destructive test samples
were marked during seaming. All destructive sample test results met project specifications. Non-
destructive testing was performed for all fusion welded seams. Repairs were performed using the
extrusion welding method for all marked defects. Vacuum testing was performed for all extrusion
welded repairs.
Panels S21 through S114 (secondary- 100mil) were inspected by AMEC and Lonestar representatives,
accepting the area (see Figure 5).
One load (11 rolls)of 100mil LLDPE single sided textured geomembrane, one load (12 rolls) of
100mil smooth geomembrane, and three loads (33 rolls) of 80mil LLDPE single sided textured
geomembrane were delivered to site during the week for a total of 56 rolls. All loads were delivered
on flat bed trucks in good condition. The rolls were unloaded using a CAT 966 front -end loader with
forks attached. The geomembrane was placed on three pieces of 4" HDPE pipe, staked two rolls high.
An AMEC field representative was present at all times during unloading of the geomembrane. The
AMEC representative also inventoried the geomembrane, as it was unloaded.
CQA ACTIVITIES:
SUMMARY:
The CQA activities performed consisted of observing, documenting and recording the construction
activities of the contractor.
AMEC observed structural fill placement within the Phase 5 VLF fill area. Ambient temperatures were
monitored during fill placement.
AMEC observed, performed necessary testing, obtained moisture samples, and assisted in the placement
and moisture conditioning of SLF material within the Phase 5 VLF.
AMEC inspected and approved subgrade for geomembrane deployment within the Phase 5 VLF.
AMEC observed, logged data, and assisted in the installation of geomembrane within the Phase 5 VLF.
AMEC inspected and accepted secondary geomembrane within the Phase 5 VLF.
AMEC observed construction of the PSSA ore slope constantly.
VLF Weekly Report WE 06.05.10.D