2014-02-07_REPORT - M1980244 (3)

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Cripple Creek & Victor Gold Mining Company PSES Pipe Rack Liner Extension Final Report ameO Quality Assurance Monitoring &Test Results February 4, 2014 6.0 GEOMEMBRANE CQA TESTING AND MONITORING The following sections describe the CQA activities performed by AMEC for the geomembrane installed in the PSES Pipe Rack Liner Extension. In accordance with the AMEC Geosynthetics CQA Plan (Section 1400.2 of the Specifications), when an AMEC monitor observed deficiencies, the monitor determined the nature and extent of the problem and notified ECA and /or CC &V. When unsatisfactory test results identified a deficiency, AMEC performed additional tests to define the extent of the deficient area. ECA corrected deficiencies to meet the requirements of the specifications, and AMEC re- tested the corrected deficiency prior to any additional related work. CQA activities conducted by AMEC during the installation of the LLDPE geomembrane at the PSES Pipe Rack Liner Extension consisted of the following: • Conformance sampling and testing of the geomembrane • Observation and approval of the random fill subgrade prior to GCL placement • Observation of GCL placement to ensure adequate overlap and that placement was performed in accordance with the Technical Specifications prior to geomembrane placement • Observation and documentation of geomembrane deployment, including verifying sheet thickness and overlap, and documenting panel layout • Observation of trial seam sample testing and documentation of results • Observation and documentation of field seaming • Identification of destructive seam sample test locations, observation of destructive seam sample testing, and documentation of test results • Observation and documentation of geomembrane repairs • Observation and documentation of non - destructive pressure testing of fusion seams and vacuum testing of extrusion seams and repairs The following sections present a detailed description of each of the above activities. 6.1 Geomembrane Conformance Testing Geomembrane manufactured by Agru America was installed for the PSES Pipe Rack Liner Expansion. A TRI Environmental (TRI) (AMEC subcontractor) representative performed geomembrane conformance sampling at the Agru plant in Georgetown, South Carolina. Samples were sent to TRI's geosynthetic laboratory for conformance testing. Geomembrane rolls were not used on the project unless approved by AMEC based on conformance test results. 12