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"NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response" is a standard maintained by the U.S.-based National Fire Protection Association. First "tentatively adopted as a guide" in 1960, [ 1 ] and revised several times since then, it defines the " Safety Square " or " Fire Diamond " which is used to ...
Life hazard - Determine if there is a hazard to the life of people who remain in the structure which is alight. It is generally recommended to assume that life safety is at risk until the firefighters have determined that the structure is clear of occupants, or that it is impossible to survive inside the structure due to the conditions of the fire.
A hazard pictogram to indicate a hazard from a flammable substance.. A hazard is a potential source of harm.Substances, events, or circumstances can constitute hazards when their nature would potentially allow them to cause damage to health, life, property, or any other interest of value.
Exposure to certain chemicals can cause acute or long-term adverse health effects. Chemical hazards are usually classified separately from biological hazards (biohazards). Chemical hazards are classified into groups that include asphyxiants, corrosives, irritants, sensitizers, carcinogens, mutagens, teratogens, reactants, and flammables. [1]
A biological hazard, or biohazard, is a biological substance that poses a threat (or is a hazard) to the health of living organisms, primarily humans. This could include a sample of a microorganism , virus or toxin that can adversely affect human health .
When used as part of an aviation hazard analysis, a "Likelihood" is a specific probability. It is the joint probability of a hazard occurring, that hazard causing or contributing to an aircraft accident or incident, and the resulting degree of loss or harm falling within one of the defined severity categories.
In medicine, triage (/ ˈ t r iː ɑː ʒ /, / t r i ˈ ɑː ʒ /; French:) is a process by which care providers such as medical professionals and those with first aid knowledge determine the order of priority for providing treatment to injured individuals [1] and/or inform the rationing of limited supplies so that they go to those who can most benefit from it. [2]
A dirty bomb or radiological dispersal device is a radiological weapon that combines radioactive material with conventional explosives. The purpose of the weapon is to contaminate the area around the dispersal agent/conventional explosion with radioactive material, serving primarily as an area denial device against civilians.