2014-02-07_REPORT - M1980244 (7)

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Cripple Creek & Victor Gold Mining Company Mill Site Earthworks Project Final Report Quality Assurance Monitoring & Test Results January 31, 2014 ameO moisture conditioning for geomembrane deployment, including verification that the surface was proof rolled, compacted, and hand worked to be free of desiccation cracks, abrupt grade changes, and sharp stones or objects. AMEC also observed the excavation, backfill, and compaction of anchor trenches. • AMEC visually monitored the placement of Drain Cover Fill (DCF) above the geomembrane in the Mill Site Earthworks Project, including verification of lift thickness and grade control; identification and removal of deleterious materials; and verification that care was exercised during fill placement to avoid geomembrane damage. AMEC performed CQA laboratory testing of grain size and Atterberg limits. • AMEC monitored the ambient air temperatures and temperatures of fills, including SLF, in accordance with Project Specifications. The ambient air and fill temperatures monitored during fill activities are summarized in Tables 2 and 3, respectively. 1.2.2 CQA/CQC Monitoring of Geosynthetics Installation AMEC provided CQA monitoring of geosynthetics used for the Mill Site Earthworks Project. CQA services consisted of performing geosynthetics inventory and checking quality control certifications prior to geosynthetics deployment. CQA activities were performed in accordance with the Geosynthetics CQA Plan (Section 1400.2 of the Project Specifications; located in Appendix E). Geosynthetics CQA activities included: • Observation and documentation of geomembrane deployment, trial seams, seaming, destructive testing, and non - destructive testing (pressure tests and vacuum tests) • Performed conformance testing of geomembrane • Measured geomembrane panel thickness and confirming adequate panel overlap • Visually inspected geomembrane sheet quality, sheet grinding, seam alignment, and continuity • Retained archive samples of geomembrane destructive tests 1.3 Project Coordination CQC and CQA activities were directed by the AMEC Project Resident. The Project Resident for the construction of the Mill Site Earthworks Project between October 2011 and November 2012 was Mr. Joseph D. Hickey and for the period between November 2012 and December 2012, was Mr. Thorne Clark. The Project Manager, Mr. Jay Janney- Moore, PE, or his representative, Mr. Ronald Arlian (Project Sponsor) made 3