2011-08-26_REPORT - M1980244 ‎(28)‎

• Permit No: M1980244
• IBM Index Class Name: Report
• Doc Date: 8/26/2011
• Doc Name: Final Report QA 2011 Phase 5 VLF Ore Storage Aug 26, 2011 vol 1 of 3
• From: CC&V
• To: DRMS
• Media Type: D
• Archive: No

•
6.4 Defect and Repair Observations
AMEC inspected geomembrane panels for damage that may have occurred during
manufacture, transport, deployment, or installation as discussed in Section 6.1. Any
damage noted (during or after deployment) by AMEC was reported. AMEC repeatedly
observed all panels and seams for defects until Ames covered the geomembrane with DCF.
AMEC documented defects by assigning a unique defect identification code to each defect,
and marking each defect code on the geomembrane. The summaries of defects and
repairs, including the approximate locations of each repair, are presented in Appendix J -4
for the 2011 Phase 5 VLF OSA 2nd Portion primary geomembrane layer.
6.5 Destructive Testing
AMEC selected destructive test locations based on Lone Star's completion of approximately
112,943 lineal feet of welding for the primary geomembrane, various working conditions,
and on seaming observations (e.g., suspicion of a defective weld). Lone Star obtained and
tested 242 fusion seam destructive samples and 19 extrusion seam destructive samples
during installation of the primary geomembrane for the 2011 Phase 5 VLF OSA 2nd Portion.
Lone Star constructed approximately 109,764 lineal feet of fusion welded seams and 3,179
lineal feet of extrusion welded seams for the primary geomembrane. The specified
frequency of destructive testing was one test per 500 lineal feet of weld. AMEC identified
and Lone Star obtained destructive samples from the primary . geomembrane panel seams
at a frequency of one destructive test sample per 454 lineal feet of fusion welded seams,
and one per 167 lineal feet of extrusion welded seams. The test frequencies exceeded
project requirements.
Destructive test frequencies and quantities include seaming of panels that are not within the
2011 Phase 5 VLF OSA 2nd Portion Ceritification Boundary. Seaming and destructive test
sample designation was performed continuously throughout construction.
AMEC Earth & Environmental, Inc.
2000 S. Colorado Blvd 2 -1000
Denver, CO 80222
Tel 303 - 935 -6505
Fax 303 - 935 -6575 www amec.com
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