The United States Department of Transportation has established nine major classes of hazards that workers need to be aware. One class is explosive hazards. This can range from chemical substances that react to pressure to blasting agents used to activate other explosive charges. The other hazard classes include gasses, flammable and combustible liquids, flammable solids. They also include oxidizers and organic peroxides, poisons, radioactive materials, corrosives and other miscellaneous materials. Each of these hazard classes can prove lethal if proper precautions are not taken. As stated in the text “Although each of the hazard classes identifies a potential for a significant risk if not properly managed, in much the same situation found in toxicology, we know that there are ways to protect ourselves from the hazards” (Gantt, 2012, p 102).