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E. In the event that seam continuity cannot be demonstrated for a non- <br />destructive test of a fusion seam as outlined above, the Contractor shall <br />perform the non- destructive testing over smaller areas as a means of <br />defining the questionable area, and shall: <br />1. Extrusion weld the outside edge of the questionable seam area <br />and vacuum box test the extrusion weld; or <br />2. Cap the questionable area and vacuum test the cap. <br />3.10 DESTRUCTIVE TESTING <br />A. Contractor shall test a minimum of one (1) destructive test sample per <br />750 feet of seam length per fusion machine from a location specified by <br />Design Engineer. Contractor shall not be informed in advance of the <br />sample location. The samples shall be taken centered over the seam and <br />prioritized as follows: <br />1. A minimum of one sample per day per fusion machine; <br />2. All areas identified as suspect during seaming, non - destructive <br />testing /monitoring, and in unusual working conditions; <br />3. A minimum of one sample for each geosynthetic seamer; <br />4. A minimum of one sample every 750 ft of seaming per fusion <br />machine. <br />B. Samples shall be cut by Contractor as the seaming progresses. <br />Sampling locations shall be determined by Design Engineer. CQA <br />Monitor must witness the obtainment of all destructive test samples by <br />Contractor. Contractor shall mark all samples with their seam number, <br />date, welding machine number, welding technician identification, extruder <br />and nozzle /wedge temperature, and ambient air temperature. Contractor <br />shall document the date, time, roll and seam number, ambient <br />temperature, and pass or fail description. All holes in the geosynthetic <br />resulting from obtaining the seam samples shall be immediately repaired. <br />All patches shall be vacuum tested. <br />C. The samples shall be a minimum 1 ft wide by 2 ft long with the seam <br />centered lengthwise. The sample shall be cut into two equal length <br />pieces, half to be given to Rio Grande Silver and the other half kept by <br />Contractor. <br />D. Contractor shall cut and test ten (10) 1 -inch wide specimens from his <br />sample. All testing shall be conducted at room temperature (60 °F to <br />80 °F). Contractor shall test five (5) specimens for seam shear strength <br />and five (5) for peel strength. Both inside and outside tracks of fusion <br />seams will be tested for peel strength. To be acceptable, four (4) out of <br />Rio Grande Silver Tailings Evaporation Pond 02620 -21 Geosynthetic Liner <br />August2011 02620 <br />