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fl <br />0 <br />0 <br />0 <br />C <br />6. Speed of hot wedge welder in feet per minute. <br />B. Weld only when ambient temperature, measured 6 inches above the geomembrane <br />is between 40°F and 104°F. <br />C. If seaming at ambient temperatures below 40°F (5°C) or above 104°F (40°C), <br />demonstrate and certify that such methods produce seams, which are entirely <br />equivalent to seams produced at ambient temperatures above 40°F (5°C) and below <br />104°F (40°C). Certify the overall quality of the geomembrane is not adversely <br />affected. Perform work under contract change order that states the seaming <br />procedure will not cause any physical or chemical modification to the <br />geomembrane, which will generate short or long-term damage to the geomembrane. <br />D. Seaming below temperatures of 32° F must be performed under cold weather <br />welding procedures approved by the Engineer. <br />3.12 NON-DESTRUCTIVE TESTING (PERFORMED BY INSTALLER) <br />A. Non-destructively test all field seams over their full length using a vacuum test unit, <br />air pressure (for double fusion seams only), spark testing, or other approved <br />methods. <br />B. Perform testing as the seaming progresses and not at the completion of all the field <br />seaming. <br />C. Note all required repairs in CQC reports and then complete all required repairs in <br />accordance with this specification. <br />3.13 NON-DESTRUCTIVE VACUUM TESTING <br />A. Equipment <br />' 1. A vacuum box assembly consisting of a rigid housing, a transparent viewing <br />window, a soft neoprene gasket attached to the bottom porthole, or valve <br />assembly, and a vacuum gauge. <br />2. A vacuum pump assembly equipped with a pressure control. <br />3. A rubber pressure/vacuum hose with fittings and connections. <br />4. A soapy solution and an applicator. <br />B. Vacuum Box Test Procedures. <br />1. Place the box over the wetted seam area (soapy solution). <br />SHAW ENV/RONMENTAL, /NC. <br />San Joaquin County — Extension of Cap Corral Hollow Sanitary Landfill — CH_Closure Cap Ext Proj_Technical Specs -4-19-12 Revl.DocReV. 0, 04/05/2012 <br />LLDPE Geomembrane <br />1 02779-15 <br />