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Newmont-Cripple Creek&Victor Gold Mine <br /> Technical Specification No.02776-O.DOCX <br /> Squaw Gulch VLF <br /> Project No.475.0106.006 <br /> April 08,2016 <br /> twenty (20) inches per minute for shear and twenty (20) inches per <br /> minute for peel. These tests shall not fail according to the criteria in <br /> Section 2.01. A break through the weld or at the weld/sheet interface <br /> shall be considered a failure in both shear and peel strength tests <br /> unless the weld strength exceeds the sheet strength, as discussed in <br /> Section 2.01. If a trial seam fails to meet field seam SPECIFICATIONS, <br /> the seaming apparatus and/or reamer shall not be accepted and shall <br /> not be used for seaming until the deficiencies are corrected and two <br /> consecutive successful full trial seams are achieved. <br /> 4. CONTRACTOR shall mark the test weld with date, ambient <br /> temperature, welding machine number, welding technician <br /> identification, machine temperature, and speed. For extrusion welding, <br /> CONTRACTOR shall record the nozzle and extrusion settings. <br /> 3.8. Nondestructive Testing <br /> A. CONTRACTOR shall non-destructively test all field seams over their full length. <br /> All test equipment shall be furnished by CONTRACTOR. <br /> B. The following vacuum box procedures are applicable to extrusion seaming and <br /> shall be followed by CONTRACTOR: <br /> 1. Excess sheet overlap shall be trimmed away. <br /> 2. Clean the vacuum box window,gasket surfaces and check for leaks. <br /> 3. Energize the vacuum pump and reduce the tank pressure to <br /> approximately 5 psi. <br /> 4. Wet a strip of geomembrane the approximate dimensions of the <br /> vacuum box with the soapy solution. <br /> 5. Place the box over the wetted area and compress. <br /> 6. Close the bleed valve and open the vacuum valve. <br /> 7. Ensure that a leak-tight seal is created. <br /> 8. For a period of not less than ten (10) seconds, examine the <br /> geomembrane through the viewing window for the presence of soap <br /> bubbles. <br /> 9. If no bubbles appear after ten (10) seconds, close the vacuum valve <br /> and open the bleed valve, move the box over the next adjoining area <br /> with a minimum three (3) inches overlap and repeat the process. <br /> 10. All areas where soap bubbles appear shall be marked and repaired and <br /> then retested. <br /> 11. Test locations, documentation number, date and tester will be <br /> indicated with an indelible marker on the geomembrane for each <br /> Page 16 <br />