Laserfiche WebLink
r_. <br />D. Provide extrusion welders equipped with gauges showing temperatures in extruder <br />apparatus and at nozzle. <br />E. Provide hot wedge welder meeting the following requirements: <br />1. Vehicular mounted <br />2. Automated variable speed capability <br />3. Equipped with devices for adjusting temperatures at the wedge <br />4. Pressure controlled by springs, pneumatics, or other system that allows for <br />variation in sheet thickness <br />5. Rigid frame fixed position equipment is not acceptable. <br />3.04 TEST EQUIPMENT <br />A. Provide tensiometer capable of measuring seam strength. Tensiometer must be <br />calibrated and accurate within 2 pounds. <br />B. Provide dies for cutting seam samples. <br />3.05 PERFORM TRIAL SEAM WELDS AS FOLLOWS <br />A. Do not begin production seam welding until equipment and welders have <br />successfully completed trial welds. <br />B. Perform trial welds on samples of geomembrane to verify the performance of <br />welding equipment, welding personnel, seam welding methods, and to verify welds <br />can be successfully performed under current weather conditions. <br />C. Frequency of trial welds: <br />1. Minimum of two trial welds per day per equipment and per welder with one <br />prior to the start of work and one at mid shift. <br />2. When directed by the CQA Monitor. <br />D. Make trial welds in the same surroundings and environmental conditions as the <br />production welds, i.e., in contact with subgrade. <br />E. Make trial weld sample at least 2 feet long and 12 inches wide. <br />F. Allow welds to cool and then cut excesses material from the ends of the welds. <br />1 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 />02779-10 <br />