Chapter 49: Ready for Review Thousands of hazardous materials incidents occur (and are reported) each year. Handling hazardous materials emergencies requires specialized training and equipment. You should never enter a hazardous materials scene without understanding the nature of the problem. According to OSHA, the levels of hazardous materials response training are: awareness, operations, technician, and specialist. The great majority of hazardous materials emergencies are transportation incidents, predominately occurring on roadways. When you are approaching an incident you should be alert for signs of hazardous materials. Signs of hazardous materials include vapor clouds, strange odors, spilled liquids, and multiple victims. Sources of information about hazardous materials include labels and placards, transport documents, material safety data sheets, and the DOT’s ERG . Hazardous materials incident management follows NIMS and ICS principles. Hazardous material incidents have hot, warm, and cold zones. Without proper personal protective equipment and training, you should not enter the hot and warm zones. The four levels of hazardous materials PPE are level A, level B, level C, and level D. Primary hazardous materials contamination comes from direct contact with the toxin. Secondary contamination is spread by people (patients, the hazardous materials team, or EMS providers), clothing, or objects. Effects from hazardous materials exposure may be local on the body or systemic. Routes of exposure include inhalation, ingestion, absorption, and injection. Rescue and decontamination of victims is secondary to rescuer and public protection. Decontamination should be undertaken as a methodical process based on the nature of the contaminant. Treatment of hazardous materials victims is usually symptomatic and supportive of the ABCs. In some cases, antidotes are indicated and must be approved by the authority having jurisdiction. Invasive procedures should be carefully administered to avoid the risk of introducing contamination. Paramedics may be directed to support a hazardous materials operation with medical monitoring of the hazardous materials personnel.