2011-08-30_REVISION - M1977215 (2)

Home Browse Search

Prior to geosynthetic installation, the CQA Monitor shall obtain samples of the geosynthetic for conformance testing to confirm that these materials meet project requirements. The conformance testing frequency shall be at a rate of one (1) test per 400,000 square feet. Samples shall be taken across the entire width of the roll and shall not include the first three feet (ft). The samples shall be 3 ft wide by the roll width. The CQA Monitor shall mark the machine direction, roll number on the sample, and date the sample was obtained, and forward the sample to a third party geosynthetic laboratory. As a minimum, the following conformance tests shall be conducted; with project requirements outlined in these Specifications: Geosynthetic: Density (ASTM D1505) Carbon black content (ASTM D1603) Thickness (ASTM D5199/D5994) Tensile strength (ASTM D6693) Puncture resistance (ASTM D4833) AM conformance tests shall be performed in compliance with the project Specifications. The CQA Monitor shall review the test results and shall report any nonconformance to the Project Manager, Design Engineer, and the Geosynthetics Installation Contractor. a. QUALITY ASSURANCE During geosynthetic installation, the CQA Monitor shall observe and document deployment, trial seams, field seaming, non - destructive and destructive seam testing, and repairs to assess that the installation is in compliance with the Specifications. The scope of the CQA program has been established with the goal of 100 percent coverage of deployment and seaming, with 75 percent coverage of the CQC non - destructive testing, destructive testing, trial seams, and repairs. Deployment - The CQA Monitor shall verify that only approved materials are used, each panel is given a unique panel number, no geosynthetic is placed during unsuitable weather conditions as outlined in these Specifications, the geosynthetic is not damaged during installation, and anchoring is performed in compliance with the Specifications and design Drawings. The CQA Monitor shall record the deployment on the deployment log form. Trial Seams - The CQA Monitor shall verify that seaming conditions are performed in compliance with the Specifications, tests are performed at required intervals, specified test procedures are followed, and retests are performed in compliance with the Specifications. If the ambient air temperature measured by the CQA Monitor is above 32 °F for the entire day, the Installer shall perform trial seams at the beginning of each crew shift, and immediately following any work stoppage (i.e., for lunch, weather conditions, etc.) of 30 minutes or more for each seaming apparatus used that day. If the ambient air temperature measured by the CQA Monitor is below 32 °F for the entire day, the Installer shall perform four (4) trial seams, at approximately the same time interval throughout the scheduled Rio Grande Silver Tailings Evaporation Pond 02620 -11 Geosynthetic Liner August 2011 02620