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<br /> Page 28 <br /> Observe sample cutting. <br /> <br /> Mark each specimen and sample with an identifying number that contains the seam <br />number, destructive sample test number, welder, and date and time welded. <br /> <br /> Record sample locations on the panel layout drawing and panel-seam logs <br /> <br /> Record the sample locations, weather conditions, and reasons samples were taken (e.g., <br />random sample, visual appearance, result of a previous failure, etc.) on the destructive <br />seam test form. <br /> <br />At each location, obtain two seam specimens that are 42-inches apart. The specimens should be 1- <br />inch wide and 12-inches long with the weld centered across the length of the specimen. The <br />Geosynthetics Contractor must test these samples to failure in the field using a tensiometer capable <br />of quantitatively measuring shear and peel strengths. For double wedge welding, the Geosynthetics <br />Contractor must test both welds. The QA/QC Inspector will observe the tests. Geomembrane seam <br />specimens pass when the break is a ductile FTB. A film tearing bond means the test specimen <br />breaks at the edge of the outside of the seam, but not in the seam. In addition, the seam strength <br />must meet the specified values. <br /> <br />If one or both of the 1-inch specimens fails in either peel or shear, the Geosynthetics Contractor can, <br />at his discretion: (1) reconstruct the entire seam between passed test locations; or (2) take another <br />test sample 10 feet from the point of the failed test and repeat this procedure. If the second test <br />passes, the Geosynthetics Contractor can either reconstruct or cap strip the seam between the two <br />passed test locations. If subsequent tests fail, the sampling and testing procedure is repeated, until <br />the length of the poor quality seam is established. Repeated failures indicate that either the seaming <br />equipment or operator is not performing properly, and appropriate corrective action must be taken <br />immediately. <br /> <br />Once the field tests specimens have passed a sample must be recovered for laboratory testing from <br />between the passing field specimen locations. The sample must be 42-inches long and 12-inches <br />wide, with the weld centered along the length of the sample. The sample must be divided into three <br />sections: one 12-inch by 12-inch section for the Geosynthetics Contractor, one 12-inch by 18-inch <br />section for laboratory testing, and one 12-inch by 12-inch for the Owner to archive. Record the <br />results of field testing on the destructive seam tests form, the panel/seam log. <br /> <br />Third Party Laboratory Testing. All CQA destructive samples must be shipped to the <br />testing laboratory to verify seam quality. The laboratory will test five specimens from <br />each sample in each method used. Minimum test values are presented in the <br />specifications. The testing laboratory must provide test results within 24 hours, in <br />writing or via telephone, to the QA/QC Manager with certified test results to be provided <br />within 5 days. <br /> <br />The QA/QC Manager must immediately notify the Construction Manager and Geosynthetics