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Such approval shall not relieve the Contractor of the <br />• responsibility of producing the required seam. Lining sheets <br />shall be seamed by a fusion method according to the <br />manufacturer's recommendations. <br />The two sheets of liner shall be overlapped to the <br />minimum manufacturer's specifications with the two sheets <br />pulled tightly to keep the seamed edges smooth and wrinkle- <br />free. If the area to be seamed is not fresh and clean and free <br />of dirt, the area shall be cleaned with trichlorethane or other <br />manufacturer-approved cleaner. No seaming shal'i be performed <br />when moisture condensation or precipitation exists at the seam <br />in quantities sufficient to reduce the effectiveness of the <br />seaming technique. No seaming shall be performed if the <br />temperature of the liner material is in excess of 110'F or less <br />than 40°F measured by placing a thermistor in contact with the <br />liner. <br />• ~ 40-mil VLDPE Field Seam Properties <br />Shear strength (lbs/in) min. 112 ASTM D3083 <br />(or 20" elog.) <br />Ultimate elongation, % FTB ASTM D413 <br />(film tear bond) <br />60-mil HDPE Field Seam Properties <br />Shear strength (lbs/in) min. 144 ASTM D3083 <br />(or 20" elog.) <br />Ultimate elongation, % FTB ASTM D413 <br />(film tear bond) <br />80-mil HDPE Field Seam Properties <br />Shear strength (lbs/in) min. 192 ASTM D3083 <br />(or 20" elog.) <br />Ultimate elongation, % FTB ASTM D413 <br />(film tear bond) <br />I1 <br />U <br />35 <br />