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, Q-,,r- -\-('-AJA 01#� <br /> Supplemental Information on Inspecting Poly Tanks <br /> Inspecting Tanks and Plumbing for Wear and Damage <br /> Damage to tanks may be caused by impact,frequent loading or unloading. product movement during <br /> transport, sunlight, or normal aging. Signs of damage may include dents, cuts, punctures, or cracks. A <br /> tank may fail before damage is visible for no apparent reason; inspection and maintenance are important. <br /> The severity of deterioration and damage should be used to determine if tanks are fit for continued use. <br /> Valves, gaskets,or fittings may become misaligned, loose, or deteriorated resulting in seepage. gapping, <br /> or brittleness and should be replaced as needed. Pumps and other equipment should be repaired as <br /> necessary(e.g. if leaking,fouling,corroding, or worn). In general. poly tanks are not repairable. <br /> Damage is frequently observed on stationary tanks at the fittings and near the bottom of the tank. <br /> Examples of Damage <br /> r <br /> Surface scratch or cut Bee crack at recess oint Cut n' Moderate crazing with crack <br /> 7-7 <br /> Flaking Deep crack at recess point Moderate stress cracksSignificant stress cracks <br /> Scratches can usually be felt on the surface of the tank. Cracks appear as very abrupt lines,which may(or <br /> may not)be felt on the surface of the tank. Stress cracks(or crazing)are a serious sign of damage and <br /> frequently occur at stress points. Stress points on stationary tanks include fittings, impact points, near the tap, <br /> and the"knuckle"(bottom bend). Stress cracks appear as a network (or spider web)of lines and are often not <br /> visible without close inspection. Conduct one or more of the integrity tests when a tank shows signs of <br /> damage. <br />