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Policy and Procedures
The most common fire hazard in the laboratory is ignition of the vapor that collects above flammable liquids. Flammables maintained in the lab are required to be tightly capped when not in use. The minimum amount needed for the immediate work should be out on the bench top and kept in an appropriate closed container when not in use. No more than 10 gallons of flammable liquid may be present in any lab outside of a flammable storage cabinet.
More of one of these components can reduce the amount required of another.
While it is possible for there to be too little fuel to support combustion, it is also possible for there to be too much - reducing the available oxygen to support burning. Unfortunately, the fuel level will begin to dissipate bringing the fuel back into its flammable range without warning.
Flammable liquids should be stored in a flammable storage cabinet. No more than 10 gallons of flammable liquids including the amount contained in solutions, waste containers and continuous processes can be stored in a lab outside of a flammable storage cabinet. The cabinet does not supply ventilation but only protects the flammable liquids in the event of a fire to allow occupants time to escape before the fire accelerates. Be sure you do not exceed the rated capacity of the cabinet. The standard capacities are 30, 45, 60, and 120 gallons.