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 6.0 GEOMEMBRANE CQA TESTING AND MONITORING mlle The following sections describe the CQA activities performed by AMEC for the geomembrane installed for the Project. In accordance with the AMEC Geosynthetics CQA Plan (Section 01400.2 of the Project Specifications in Appendix E), when an AMEC monitor observed deficiencies, the monitor determined the nature and extent of the problem by performing additional testing to define the extent of the deficient area. Lone Star and /or CC &V were notified of the deficiency for repairs. Lone Star corrected deficiencies to meet the requirements of the Project 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 for the Project consisted of the following: • Conformance sampling and testing of the geomembrane • Observation and approval of the SLF surface prior to deployment of 80 -mil single - sided and double -sided textured LLDPE geomembrane • 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 Poly -Flex, Inc. and GSE Environmental was installed for this Project. A TRI /Environmental (TRI) (AMEC subcontractor) representative performed geomembrane conformance sampling at the Poly -Flex, Inc. plant in Grand Prairie, Texas and GSE plant in Houston, Texas. 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. Prior to the 80 -mil single -sided and double -sided textured geomembrane arrival to site, AMEC performed 11 conformance tests on the single -sided textured geomembrane, at 22