2009-07-07_REPORT - M1980244 (6)

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Cripple Creek & Victor Gold Mining Company Cresson Project ameO Quality Assurance Monitoring and Test Results Load Out Bin Relocation July 7, 2009 6.0 GEOSYNTHETIC CQA TESTING AND MONITORING The following sections describe the CQA activities performed by AMEC for the geomembrane installed in the LOB. In accordance with the AMEC CQA Plan, when a AMEC monitor observed deficiencies, the monitor determined the nature and extent of the problem and notified Lonestar and /or CC &V. When unsatisfactory test results identified a deficiency, AMEC performed additional tests to define the extent of the deficient area. Lonestar corrected deficiencies to meet the requirements of the specifications, and AMEC retested and /or approved the corrected deficiency prior to any additional related work. The following sections include discussions of the deficiencies encountered. 6.1 LOB Geomembrane CQA activities conducted by AMEC during the installation of the LLDPE geomembrane in the LOB consisted of the following: ■ Conformance sampling and testing of the geomembrane; ■ Observation and approval of the SLF surface prior to deployment of 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; and, ■ 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. SAPROJECTS\1125E CCV COXH3 - CONSTRUCTION \LOB CERT REPORT\REPORT BODY\LOB CERT REPORT 2009.07.01.DOC 17