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 Protect
Quality Assurance Monitoring and Test Results
Phase 4B /C Triangle Liner Certification
August 10, 2010
During geomembrane deployment, AMEC measured sheet thickness with a digital caliper.
AMEC measured sheet thickness at five random locations along one edge of each
geomembrane panel. The average thickness specified for the 100 -mil geomembrane was 101
mils. Project specifications for 100 -mil geomembrane required that the average of the five
thickness measurements be no less than the 100 mils, and that no individual measurement be
less than 90 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. AMEC logged any penetration
defects and marked them on the panel. Section 6.1.4 provides further discussion of repairs.
AMEC also observed the overlap of each panel with adjacent panels to verify that sufficient
overlap for seaming existed. AMEC logged insufficient panel overlaps as defects and marked
them for correction.
Ames surveyed all panel intersections and destructive seam sample locations.
6.1.3 Seaming
The double wedge fusion weld was the principal seaming method employed by Lonestar for this
project. Lonestar fusion seamed (welded) geomembrane on the same day that it was deployed.
Lonestar used extrusion welds for seaming where the geomembrane tied into the existing VLF
geomembrane. AMEC observed trial seam tests, monitored seaming equipment temperatures
and speed, and provided visual observation of the seaming procedures. AMEC observed the
entire lengths of all seams, patches, and other repairs either during seaming, or shortly after
completion.
6.1.3.1 Trial Seam Monitoring
Lonestar 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 and in the event that devices
were disconnected from power and re- energized.
Lonestar cut 1 -inch wide samples (coupons) from each trial seam and tested the coupons with a
field tensiometer. Lonestar tested each double wedge fusion trial seam twice for peel adhesion
(peel) and once for bonded seam strength (shear). Lonestar conducted peel tests on fusion
welds on both the inner and outer tracks of each peel coupon. Lonestar tested each extrusion
trial seam twice for peel and once for shear.
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