2011-08-26_REPORT - M1980244 (28)

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• 6.0 GEOMEMBRANE CQA TESTING AND MONITORING The following sections describe the CQA activities performed by AMEC for the geomembrane installed in the 2011 Phase 5 VLF OSA 2nd Portion, and the geomembrane installed in the Leak Detection Trenches. In accordance with the AMEC CQA Plan, when an AMEC monitor observed deficiencies, the monitor determined the nature and extent of the problem and notified Lone Star and /or CC &V. When unsatisfactory test results identified a deficiency, AMEC performed additional tests to define the extent of the deficient area. Lone Star corrected deficiencies to meet the requirements of the specifications, and AMEC retested and /or approved the corrected deficiency prior to any additional related work. CQA activities conducted by AMEC during the installation of the LLDPE geomembrane in the 2011 Phase 5 VLF OSA 2nd Portion 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 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; 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. AMEC Earth & Environmental, Inc. 2000 S Colorado Blvd 2 -1000 Denver, CO 80222 Tel 303 - 935 -6505 Fax 303 - 935 -6575 www amec com 27