2014-01-17_REPORT - M1980244 (3)

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Cripple Creek & Victor Gold Mining Company Phase 5 Slide Repair Final Report Quality Assurance Monitoring & Test Results January 14, 2014 ameO per 150,000 square feet was exceeded. Testing frequency was based on AMEC's inventory of the 80 -mil double -sided textured geomembrane. Conformance testing for the geomembrane used to construct the Phase 5 Slide Repair met specifications. Conformance test results are presented in Appendix K. 6.2 Deployment Monitoring Geomembrane panel deployment monitoring performed by AMEC included: • Observation of panel surface condition and panel overlap • Assignment of panel numbers • Verification of factory roll number and receipt of complete certification prior to allowing deployment • Measurement of sheet thickness • Documentation of deployed panel lengths • Development of panel layout record drawing Prior to the deployment of geomembrane, AMEC and ECA verified that the SLF (subgrade) was free of soft spots, protrusions, angular particles, abrupt grade changes, and loose soil. AMEC and ECA also verified the surface was free of desiccation cracks. Where the surface did not meet specifications, Ames repaired the area to meet project specifications. ECA provided written certification of the SLF subgrade acceptance prior to the placement of geomembrane. The acceptance certificates are presented in Appendix G. AMEC assigned each geomembrane panel a number. Double -sided textured 80 -mil LLDPE geomembrane panels deployed for the Phase 5 Slide Repair were designated as P1 through P11. AMEC marked the panel designation and roll number directly on each panel after it was deployed. The geomembrane record drawing, showing the Phase 5 Slide Repair's geomembrane panel layout and destructive testing is presented as Sheet 3 of 3 in Appendix A. During geomembrane deployment, AMEC measured sheet thickness with digital callipers at five random locations along each edge of each geomembrane panel. The average thickness specified for the 80 -mil geomembrane was 80 mils. Project specifications for 80 -mil geomembrane required 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. s: projects \1568 cc &v - ph v slide repair cqa \11.0 certification report\cc &v roc report.docx 12