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C"M LEVE W E L D E R S S U P P L Y • Flammable and Combustible Materials The Location Manager shall regularly evaluate the presence of combustible materials at Cnrnnlefe Eelders Suntrli}(see Appendix D). Certain types of substances can ignite at relatively low temperatures or pose a risk of catastrophic explosion if ignited. Such substances obviously require special care and handling. E. Class A combustibles. These include common combustible materials (wood, paper, cloth, rubber, and plastics) that can act as fuel and are found in non-specialized areas such as offices. To handle Class A combustibles safely: • Dispose of waste daily. ■ Keep trash in metal-lined receptacles with tight-fitting covers(metal wastebaskets that are emptied every day do not need to be covered). • Keep work areas clean and free of fuel paths that could allow a fire to spread. • Keep combustibles away from accidental ignition sources, such as hot plates, soldering irons, or other heat-or spark-producing devices. ■ Store paper stock in metal cabinets. • Store rags in metal bins with self-closing lids. • Do not order excessive amounts of combustibles. • Make frequent inspections to anticipate fires before they start. Water,multi-purpose dry chemical (ABC), and halon 1211 are approved fire extinguishing agents for Class A combustibles. 2. Class B combustibles. These include flammable and combustible liquids(oils,greases,tars, oil-based paints,and lacquers), flammable gases, and flammable aerosols. To handle Class B combustibles safely: • Use only approved pumps, taking suction from the top, to dispense liquids from tanks, drums, barrels,or similar containers(or use approved self-closing valves or faucets). • Do not dispense Class B flammable liquids into containers unless the nozzle and container are electrically interconnected by contact or by a bonding wire. Either the tank or container must be grounded. • Store, handle,and use Class B combustibles only in approved locations where vapors are prevented from reaching ignition sources such as heating or electric equipment,open flames. or mechanical or electric sparks. ■ Do not use a flammable liquid as a cleaning agent inside a building (the only exception is in a closed machine approved for cleaning with flammable liquids). 6