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• Part 77 also states, "signs warning against smoking and open flames shall be posted so <br />they can be readily seen in areas or places where fire or explosion hazards exist". <br />Fl ainmable liquids shall be stored in accordance with the standards of the National Fire <br />Protection Association. Small quantities of flammable liquids drawn from storage shall be <br />kept in properly identified safety cans. Unburied flammable liquid storage tanks shall be <br />mounted securely on firm foundations. Outlet piping shall be provided with flexible <br />connections or other special fittings to prevent adverse effects from tanks settling, <br />Fuel lines shall be equipped with valves to cut off fuel at the source and shall be <br />located and maintained to minimize fire hazards. Areas surrounding flammable liquid <br />storage tanks and electrical flammable liquid storage tanks and electrical substations and <br />transformers shall be kept free from grass (dry), weeds, underbrush, and other combustible <br />na tr:ri als such as trash, rubbish, leaves, and paper for at least 25 feet in all <br />directions. <br />"Combustible materials, grease, lubricants, paints, or flammable liquids shall not be <br />allowed to accumulate where they can create a fire hazard. <br />• Firefighting equipment shall meet the following minimum requirements: fire extinguishers <br />shall be of the appropriate type for the particular fire hazard involved; adequate in <br />number and size for the particular fire hazard involved; replaced immediately with fully <br />charged extinguishers after any discharge is made from an extinguisher; and approved by <br />the Underwriter's Laboratories, Inc., or the Factory Mutual Research Corporation, or other <br />competent testing agency acceptable to the Mining Safety and Health Administration. Each <br />structure presenting a fire hazard shall be provided with portable fire extinguishers <br />commensurate with the potential fire hazard at the structure in accordance with the <br />recommendations of the National Fire Protection Association. <br />Mobile equipment, including trucks, front-end loaders, bulldozers, portable welding units, <br />and augers, shall be equipped with at least one portable fire extinguisher, Power <br />shovels, draglines, and other large equipment shall be equipped with at least one portable <br />fire extinguisher; however, additional fire extinguishers may be required by an authorized <br />representative of the Secretary. Auxiliary equipment such as portable drills, sweepers, <br />and scrapers, when operated more than 600 feet from equipment required to have portable <br />fire extinguishers, shall he equipped with at least one fire extinguisher. Fire <br />• exti nqui shers shall be provided at permanent electrical installations commensura ie with <br />the potential fire hazard at such installation in accordance with the recommends Lion of <br />4 <br />