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FIRE PREVENTION Arson Fires shredded tire material. The microbes metabolize these organic compounds Arson fires like Hagersville, Ontario are leading to an anaerobic condition. Light difficult to control. In this case, a group hydrocarbon gasses, like methane,become of teenagers ignited 12,000,000 tires. It a by-product of this activity. These gasses took fire fighters 17 days to extinguish this have a lower ignition temperature than fire. This was an environmental disaster the tire material itself. for Canada. It took unlimited resources as well as hundreds of fire fighters to The suspected ignition source of these control, contain, and extinguish the gasses include the exothermic reaction of conflagration. the microbes life cycle, or friction within the shifting pile. This hypothesis is Providing 24 hour security and limiting further supported by examples of fires in access with perimeter fencing to a scrap wood chip piles and landfills. tire storage area will prove a deterrent for this type of tire fire. Of course, if Deep seated shredded tire fires produce someone is determined to purposely start few products of combustion. Sink holes a tire fire, the only protection for the on the surface of the pile is evidence of a entire inventory will again be separation problem. Oil run-off, excessive steam, distances between the piles. carbon monoxide gas, and increases in pile temperature are other indicators. Spontaneous Ignition One recommendation to prevent this type There is no evidence of spontaneous of problem is to cover the shredded tire ignition in whole tire piles. However, material to prevent water from seeping examples of spontaneous ignition in into the pile. But covering large shredded shredded tire piles do exist. In some tire piles has disadvantages for fire cases the fire in shredded tire piles began suppression and is simply not practical for after a heavy rain. Spontaneous ignition large tire piles. Turning the shredded pile in shredded tire piles is a rare or providing drainage under the shredded phenomenon which requires further pile are two recommendations that would investigation. prevent spontaneous ignition. Monitoring the shredded pile temperature visually-- Several hypothesis have been suggested to watch for excessive steam in the early account for these deep seated fires. One morning-- or with thermocouples are early hypothesis is dependent on the moisture detection techniques that may be content of the shredded pile. Rain water employed. leaches organic substances and minerals from the tire material. These organic substances and minerals support microbial activity within the interstitial spaces of the 25