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ameO <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 geomembrane through the <br /> viewing window for the presence of soap bubbles. <br /> 9. If no bubbles appear after ten (10) seconds, close the vacuum valve and open the bleed <br /> valve, move the box over the next adjoining area with a minimum three (3) inches <br /> overlap and repeat the process. <br /> 10. All areas where soap bubbles appear shall be marked and repaired and then retested. <br /> 11. Test locations, documentation number, date and tester will be indicated with an indelible <br /> marker on the geomembrane for each repair or seam section. The color code for <br /> indelible markers is to be determined at the pre-construction meetings, and strictly <br /> adhered to. <br /> C. The following nondestructive test procedures are applicable to fusion seaming and shall be <br /> followed by CONTRACTOR. <br /> 1. Seal one end of the seam to be tested. <br /> 2. Insert needle or other approved pressure feed device through the sealed end of the <br /> channel created by the double wedge fusion weld. <br /> 3. Energize the air pump to verify the unobstructed passage of air through the channel. <br /> 4. Seal the other end of the channel. <br /> 5. Energize the air pump to the pressure of approximately 30 psi, close valve, and sustain <br /> pressure for approximately 5 minutes. <br /> 6. If loss of pressure exceeds 3 psi, or pressure does not stabilize, locate faulty area, repair, <br /> and retest. <br /> 7. Remove needle or other approved pressure feed device. <br /> 8. Repair pressure test locations as described in Section 3.11. <br /> 9. Beginning and ending pressures and times, test locations, documentation number, date, <br /> and tester will be indicated with an indelible marker on the geomembrane at each test <br /> interval location. <br /> D. The following procedures shall apply to locations where seams cannot be non-destructively tested, <br /> as determined by CERTIFYING ENGINEER: <br /> 1. If the seam is accessible to testing equipment prior to final installation,the seam shall be <br /> non-destructively tested prior to final installation. <br /> Section 02776 Page 18 of 22 May 9,2012 <br /> Geomembrane Revision 1 <br />