2011-11-19_REPORT - M1980244

• Permit No: M1980244
• IBM Index Class Name: Report
• Doc Date: 11/19/2011
• Doc Name: FINAL REPORT, VOLUME 1 of 3 2011 phase 5 valley leach facility ore storage 1 OF 1
• From: CC&V
• To: DRMS
• Media Type: D
• Archive: No

6.0 GEOMEMBRANE CQA TESTING AND MONITORING
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The following sections describe the CQA activities performed by AMEC for the
geomembrane installed in the 2011 Phase 5 VLF OSA 3 Portion, and the geomembrane
installed in the Leak Detection Trenches.
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 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 3 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 28