2014-02-07_REPORT - M1980244 ‎(3)‎

• Permit No: M1980244
• IBM Index Class Name: REPORT
• Doc Date: 2/7/2014
• Doc Name: Final Report Quality Assurance Monitoring & Test Results
• From: CC&V
• To: DRMS
• Email Name: TC1
• Media Type: D
• Archive: No

Cripple Creek & Victor Gold Mining Company
PSES Pipe Rack Liner Extension
Final Report
Quality Assurance Monitoring & Test Results
February 4, 2014
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that the average of the five thickness measurements be no less than 80 mils, and that
no individual measurement be less than the nominal thickness minus 8 mils (i.e., 72
mils). The thickness monitoring provided by AMEC indicated that all of the panels met
or exceeded project requirements.
AMEC personnel measured deployed panel lengths by use of a measuring wheel.
Recorded lengths were approximate, and do not reflect any trimming or adjustments
made for final placement or anchor trench lengths.
AMEC personnel observed the surface of each deployed panel and logged any
penetration defects and marked them on the panel. Section 6.4 provides further
discussion of repairs. The overlap of each panel with adjacent panels to verify that
sufficient overlap for seaming existed was observed. AMEC logged insufficient panel
overlaps as defects and marked them for correction.
Ames surveyed all panel intersections and destructive seam sample locations. Using
these points, AMEC has provided the primary geomembrane panel layout, Sheet 2 of
2, in Appendix A.
The geomembrane deployment observations associated with the PSES Pipe Rack
Liner Extension are presented in Appendix J.1.
6.3 Seaming
The double wedge fusion weld was the principal seaming method employed by ECA
for this project. ECA fusion seamed (welded) geomembrane on the same day that it
was deployed. Extrusion welds were used for seaming where the new geomembrane
was tied into the existing geomembrane, for repairs, and where conditions were
unfavourable for fusion welding (e.g., sharp corners). AMEC observed trial seam
tests, monitored seaming equipment temperatures and speed; and provided visual
observation of the seaming procedures. The entire lengths of all seams, patches, and
other repairs during seaming were documented and inspected.
6.3.1 Trial Seam Monitoring
ECA performed trial seams to monitor the performance of the seaming apparatus and
operator under actual site conditions. Each welding operator and his apparatus
produced trial seams prior to the beginning of each day's seaming operation, after all
work activity interruptions, and in the event that devices were disconnected from power
and re- energized.
ECA cut 1- inch -wide samples (coupons) from each trial seam and tested the coupons
with a field tensiometer. ECA tested each double wedge fusion trial seam twice for
peel adhesion (peel) and once for bonded seam strength (shear). Tests were
conducted on fusion welds on both the inner and outer tracks of each peel coupon.
ECA tested each extrusion trial seam twice for peel and once for shear.
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