2010-08-10_REPORT - m1980244

• Permit No: m1980244
• IBM Index Class Name: REPORT
• Doc Date: 8/10/2010
• Doc Name: QA REPORT Phase 4B/C Triangle Liner Certification Aug 10, 2010
• From: CC&V
• To: DRMS
• Media Type: D
• Archive: No

Cripple Creek & Victor Gold Mining Company
Cresson Project
Quality Assurance Monitoring and Test Results
Phase 4B /C Triangle Liner Certification
August 10, 2010
AMEC personnel observed the testing of trial seam samples and documented test results.
AMEC observed the tensile testing of each trial seam coupon to verify that project yield
strengths were met during shear testing and that failure did not occur in the weld during peel
testing. When trial seams did not meet specifications, AMEC verified that the welding apparatus
was not used until two consecutive trial seams performed by the same technician /apparatus
combination met specifications. The trial seam test results for fusion seaming are presented in
Appendix H -2. Lonestar used two tensiometers during the project. Figures 2 and 3 show the
codes used to designate passing and failing test results.
6.1.3.2 Seaming Observations
AMEC personnel observed seams before, during and after welding. AMEC checked each seam
for adequate overlap prior to seaming and to verify that the seam area was clean and dry.
AMEC documented Lonestar personnel performing the seaming and the seaming equipment
used. Following the completion of seaming and routine repairs, AMEC checked the full length
of each seam to verify that no additional repairs were required. In the event that additional
repairs were needed, AMEC marked the location requiring repair on the geomembrane,
documented the location, and brought the repair area to the attention of Lonestar. Once
Lonestar made repairs, AMEC checked the repair location to verify completion. AMEC
inspected all seams for quality and completion. AMEC personnel conducted a final
walk- through to verify completion of the entire geomembrane system and to identify any
additional damage that may have occurred during construction operations.
6.1.4 Defect and Repair Observations
AMEC inspected geomembrane panels for damage that may have occurred during
manufacture, transport, deployment, or installation as discussed in Section 5. AMEC 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, repairs, and
non - destructive testing of repairs, including the approximate locations of each repair are
presented in Appendix H -4.
6.1.5 Destructive Testing
AMEC selected destructive test locations based on Lonestar's completion of geomembrane
welding, various working conditions, and on seaming observations (e.g., suspicion of a defective
weld). Lonestar obtained and tested two fusion seam destructive samples during the installation
of the geomembrane.
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