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<br />FIELD SEAM FAILURE <br />Should failure occur through excessive leak down over the scheduled time period, check <br />both ends of seam to ensure proper seal and retest. Should failure reoccur, check the top <br />fusion seam by applying a constant flow of air pressure to void or air channel. Mix a <br />strong solution of liquid detergent and water and apply an ample amount to the top fusion <br />weld. Any failure or leak will be indicated by continuous bubbles appearing. <br />If no failure appears in the top fusion seam area, check systematically by isolating <br />random sections of the seam. Then retest each section by pressure testing until the leak is <br />located. Repair failed seam azea by extrusion welding the outside edge of the top fusion <br />weld between azeas of failure. Then vacuum test repair seam azea. All repairs in <br />accordance with ILPI Quality Assurance/Quality Control Manual. <br />53 <br />