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EXCEPTIONS <br /> Wood and untreatec jod products , articles (obje(, such as razors blades , <br /> tools , clothes , etc. ) , tobacco products , and acoholic beverages are not regulated <br /> as hazardous materials for the purposes of the Hazardous Materials Storage Permit. <br /> HAZARD CLASSES <br /> Materials are considered hazardous if they meet the definition of a Department <br /> of Transportation (DOT) hazard class. The following are abbreviated descriptions <br /> of those classes. <br /> Combustible liquids - A liquid with a flash point greater the 100° F and <br /> less than 200° F. <br /> Corrosive Material - Material which will cause destruction or irreversible <br /> alterations to human skin or which corrodes steel rapidly <br /> (0. 25- inch per year) . <br /> Cryogenic liquid - A refrigerated liquified gas with a boiling point less <br /> than 130° F at 1 atmosphere. <br /> Etiologic agent - A micoorganism or its toxin which causes or may cause human <br /> disease. <br /> Explosive A - Detonating materials ; high explosives and low explosives . <br /> Explosive B - Explosives which function by rapid combustion . <br /> Explosive C - Articles containing Class A or B Explosives in limited quantities. <br /> Flammable gas - A compressed gas for which a 13% or less mixture in air is <br /> flammable or which has a flammable range greater than 12%. <br /> Flammable liquid - A liquid with a flash point less than 100° F. <br /> Flammable solid - Material which can cause fires through friction or retained <br /> heat which can be ignited readily and burns vigorously <br /> and persistently; includes water reactive and spontaneously <br /> combustible materials. <br /> Irritating material - Material which gives off dangerous or intensely irritating <br /> fumes when exposed to air or upon contact with fire. <br /> Non-flammable gas - A compressed gas which does not meet the definition of <br /> flammable gas above. <br /> Organic peroxide - Hydrogen peroxide in which the hydrogens are substituted <br /> with organic radicals , unless the material is an Explosive <br /> A or B. <br />