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Hazard Control Zones. The designation of areas at a hazardous materials incident based upon safety and the degree of hazard. Many terms are used to describe these hazard control zones; however, for the purposes of this text, these zones are defined as the hot, warm and cold zones.

Hazardous Materials. (1) Any substance or material in any form or quantity that poses an unreasonable risk to safety and health and property when transported in commerce (Source: U.S. Department of Transportation [DOT], 49 Code of Federal Regulations (CFR) 171). (2) Any substance that jumps out of its container when something goes wrong and hurts or harms the things it touches (Source: Ludwig Benner).

Hazardous Materials Group. The ICS organi- zational level responsible for specified haz- ardous materials-related functional assign- ments at an incident.

Hazardous Materials Response Team (HMRT). An organized group of employees, designated by the employer, who are expected to perform work to handle and control actual or potential leaks or spills of hazardous sub- stances requiring possible close approach to the substance. A Hazmat Team may be a sepa- rate component of a fire brigade or a fire de- partment or other appropriately trained and equipped units from public or private agen- cies.

Hazardous Materials Specialists. Individuals who respond and provide support to Haz- ardous Materials Technicians. While their du- ties parallel those of the Technician, they require a more de-tailed or specific knowledge of the various substances they may be called upon to contain. Would also act as a liaison with Federal, state, local and other governmen- tal authorities in re-gards to site activities.

Hazardous Materials Technicians. Individu- als who respond to releases or potential re- leases of hazardous materials for the purposes of stopping the leak. They generally assume a more aggressive role in that they are able to ap- proach the point of a release in order to plug,


patch or otherwise stop the release of a haz- ardous substance.

Hazmat. Acronym used for Hazardous Mate- rials.

Hazmat Group. Responsible for all hazmat operations which occur at a hazmat incident. Functions include safety, site control, informa- tion, entry, decontamination, hazmat medical, and hazmat resources.

Hazardous Waste Operations and Emergency Response. Also known as HAZWOPER, this federal regulation was issued under the au- thority of SARA, Title I. The regulation estab- lishes health, safety and training requirements for both industry and public safety organiza- tions that respond to hazmat or hazardous waste emergencies. This includes firefighters, law enforcement and EMS personnel, hazmat responders, and industrial Emergency Re- sponse Team (ERT) members.

HAZWOPER. Acronym used for the OSHA Hazardous Wastes Operations and Emergency Response regulation (29 CFR 1910.120).

High Level Alarms (HLA). Alerting devices that trigger an alarm when storage tanks re- ceiving product from a pipeline are in danger of being overfilled. These alarms typically have two settings—a high alarm and a high-high alarm. The high alarm setting provides an alarm approximately 15 minutes before a tank may be overfilled if it continues to be filled at its maximum calculated fill rate. A high alarm signal may trigger a number of actions, includ- ing immediate communications between the pipeline operations center and personnel from the receiving terminal. If a high-high level alarm signal is received, the pipeline opera- tions center will immediately remotely shut- down the primary supply valve from the pipeline into the receiving terminal.

High Temperature Protective Clothing. Pro- tective clothing designed to protect the wearer against short-term high temperature expo- sures. Includes both proximity suits and fire entry suits. This type of clothing is usually of limited use in dealing with chemical expo- sures.

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