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ENVIRONMENTAL IMPACT <br /> Tire storage may potentially impact the 6 Petroleum waxes <br /> environment. Tire fires can release toxins 0 Carbon black <br /> into the air, soil, and water. Tire storage 6 Fatty acids <br /> also potentially threatens public health by 6 Inert material <br /> providing a habitat to indigenous wildlife. 6 Wire <br /> 6 Pigments: zinc oxide, titanium dioxide <br /> Once a tire pile becomes fully involved, <br /> the fire service must make decisions Collectively, these materials exposed to <br /> regarding containment, control, and uncontrolled combustion will produce <br /> extinguishment of the fire. These chemicals that are known or suspected <br /> decisions should minimize the potential carcinogens. These chemicals can be <br /> damage to the environment. To absorbed either through the skin, mucous <br /> understand the dynamics of this membranes, or respiratory system <br /> emergency, we need to know more about (Appendix A). Exposure hazards <br /> the basic chemistry of tires. associated with the smoke plume, water <br /> runoff, and soil from past tire fires include <br /> TIRE COMPOSITION AND 6 Volatile organic chemicals <br /> TOXIC RELEASES 6 Polynuclear aromatic hydrocarbons <br /> Carbon monoxide <br /> Over the years the tire manufacturing 6 Heavy metals <br /> industry has tried to create a product that <br /> will go farther and last longer. Tire Trace amounts of heavy metals like <br /> formulas from one company to the next cadmium, chromium, iron, and lead can <br /> are, of course, a closely guarded secret. be attributed to rims, lead weights (used <br /> But generally speaking, the weight of an to balance tires), and other metal objects <br /> average scrap passenger car tire is 22 scrapped with the tires. <br /> pounds. Of this weight 84% is comprised <br /> of synthetic rubber compounds. A tire's Professor Williamson, from U.C.Berkeley, <br /> composition includes was asked to compare the toxicity of <br /> burning tires to a typical 1,800 square foot <br /> 6 Natural & synthetic rubber house, fully furnished, with an asphalt <br /> 6 Sulfur and sulfur compounds shingle roof. He pointed out the difficulty <br /> 6 Clay in such a broad comparison due to the <br /> 0 Phenolic resin differences in chemistry and density of <br /> 6 Oil fuel. He estimated, however, that it would <br /> 6 Fabric only take 30 or 40 tires to equal the <br /> emissions of a typical house fire. <br /> 15 <br />