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Cripple Creek & Victor Gold Mining Company <br />Laboratory Liner Extension <br />Final Report <br />Quality Assurance Monitoring & Test Results <br />January 14, 2014 <br />ameO <br />• AMEC observed and documented the means by which concrete was placed; <br />monitoring included observing proper application, vibration, and finishing of the <br />slab to design requirements <br />• AMEC obtained the certified weight masters delivery ticket associated with every <br />truckload of concrete that was placed at the Laboratory Liner Extension; these can <br />be reviewed in Appendix E <br />• AMEC performed concrete cylinder tests to verify the strength of the newly placed <br />concrete to ensure the specified 4,000 pounds per square inch (psi) 28 day <br />compressive strength requirement was met <br />2.2 Subgrade Preparation <br />Ames graded the subgrade to meet design requirements. The subgrade was moisture <br />conditioned and compacted as needed to meet project specifications. Prior to GCL <br />installation, the subgrade was verified to be firm, unyielding, and free of any <br />vegetation, construction debris, sticks, sharp rocks, void spaces, ice, abrupt elevation <br />changes, standing water, and cracks greater than 0.25 inches in width. The subgrade <br />was accepted by the AMEC CQA engineer; a copy of the certificate of acceptance can <br />be found in Appendix F. <br />2.3 Rebar <br />The Laboratory Liner Extension used #4 rebar spaced at 12 inches on- center to form <br />the reinforcing grid. AMEC observed the placement of this rebar to ensure that it was <br />placed according to the plans and specifications. All bar and tie wire material used <br />met the requirements of specification 03220. <br />2.4 Embeds and Accessories <br />AMEC observed the installation of the liner anchoring system to the existing concrete <br />slab. Ames labourers were observed drilling holes in the existing slab and installing an <br />anchor system that was comprised of a 1 1/2 x Y4 inch stainless steel batten strip held in <br />place by 3- inch -long stainless steel expansion bolts 3/8 inches in diameter. The system <br />included a 1 '/2 x' /4 - inch neoprene gasket on both sides of the geomembrane liner as <br />well as a bead of silicone sealant placed along the bottom edge of the finished system. <br />The installation of this system was done in accordance with the specifications, the <br />plans, and the manufacturers' installation requirements. <br />Along the edges of the new concrete slab, Ames labourers placed an attachment strip <br />called "T -lock" manufactured by Agru America. The strip was embedded into the new <br />slab 3 inches below the top surface of the edge of the slab in accordance with the <br />manufacturer installation requirements. <br />sAprojects \1125m -cc &v lab liner extension\h2 - design \lab liner extension \roc report\lab liner roc report.docx 4 <br />