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0 0 <br /> o No welding or cutting is performed on tanks, drums, or other containers <br /> that have contained flammable liquids unless they have been thoroughly <br /> purged and tested inside with a combustible gas detector. <br /> o The area surrounding the cutting or welding operation is free of all <br /> flammable or combustible materials, liquids, or vapors, lint, and dust. <br /> o Cylinders, piping, valves, regulators, and hoses are prevented from <br /> coming in contact with oil and oily substances. <br /> o Cylinders in use are placed far enough away from welding to avoid heat by <br /> radiation from heated materials, sparks, or slag. <br /> o All cylinders in use have a pressure-regulating device. <br /> o Hoses are regularly inspected for leaks, burns, tears, loose connections, <br /> and other defects . Where two hoses are joined by a web, they are of <br /> different colors or textures. <br /> 4. Painting Operations <br /> o "NO SMOKING" and "NO WELDING" signs are posted, and painting operations <br /> are separated by at least 20 feet or a fire wall from any source of flame <br /> or sparks. Only non-sparking tools are used. <br /> o Contamination by any foreign substance is prevented, and spilled <br /> materials are immediately cleaned up with noncombustible solvent and <br /> absorbent and disposed of outside the painting area in closed containers. <br /> o Discarded spray gun filter pads are immediately disposed of in a closed <br /> container outside the work area location, or else placed in a <br /> water-filled container and removed daily at the close of operations. <br /> o Only non-combustible spray filters are used. <br /> o All paint, solvent, and spray finish containers are kept closed and away <br /> from sources of heat or flame. <br /> o All valves are kept closed when not in use, <br /> o Heaters (except approved heat lamps) are not used in spray booths or near <br /> accumulations of combustible residues. <br /> o Work areas are kept free of combustible residues or dusts, and all rags <br /> and waste are placed in closed metal containers. <br /> 5 . Vehicle Fueling Operations <br /> o Motor vehicles are fueled only with approved pumps from portable or <br /> underground tanks, or from approved 1-5 gallon safety containers. Open <br /> containers are never used. <br /> 4-3 <br />