2011-11-19_REPORT - M1980244 ‎(4)‎

• Permit No: M1980244
• IBM Index Class Name: Report
• Doc Date: 11/19/2011
• Doc Name: FINAL REPORT, VOLUME 2 OF 3 ‎(continued)‎ 2011 phase 5 valley leach facility ore storage 3 OF 3
• From: CC&V
• To: Drms
• Media Type: D
• Archive: No

MR M-e
II) Storm Water Management
A) Best Management Practices
Best Management Practices are being observed throughout the VLF Phase 5 Project.
III) Material Processing
A) Drain Cover Fill Process Area
No Drain Cover Fill (DCF) was processed during the week.
Location
This Week
Cumulative
Comments
(tons)
(tons)
DCF Process
1,723
122,946
Total
1,723
122,946
IV) VLF Geosynthetics
A) Geomembrane Installation
1) VLF
Geomembrane installation within the Phase 5 VLF continued performing deployment,
seaming, and repair /QC activities. Geomembrane installation was performed in the area shown
on Figure 3. Approximately 111,246 square feet of primary 100mil LLDPE 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 Lone Star representatives
prior to geomembrane deployment (see Figure 3). Approximately 5,900 linear feet of seam was
fusion welded using two fusion welding machines. Thirteen 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.
B) Anchor Trench
1) VLF
Anchor trench backfill was performed between stations B 12 +00 ( + / -) and B 14 +00, between
stations C0 +00 ( + / -) and C3 +00 ( + / -) and between stations G30 +00 ( + / -) and G32 +50 ( + / -)
using a John Deere 35D excavator and laborers. An AMEC representative observed and
inspected the anchor trench backfill. The trench was found to be backfilled in accordance with
design drawings and project specifications.
C) Geomembrane Acceptance
1) VLF
After air testing was performed, the geomembrane in the anchor trench was accepted to allow
for backfilling (see Figure 4 for previously accepted geomembrane).
D) Geomembrane Delivery
1) VLF
Two loads (22 rolls) of 80mi1 LLDPE single sided textured geomembrane rolls were delivered
to site during the shift. The load was delivered on a flat bed truck in good condition. The rolls
were unloaded using a CAT 950 front -end loader with forks attached. The geomembrane was
placed on three pieces of HDPE pipe, stacked two rolls high. An AMEC field representative
VLF Weekly Report WE 09.18.10.1)