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The highest degree of hazard - severe hazard that a very short exposure could cause serious injury or death.
Health (Blue): 1 Flammability (Red): 2 Reactivity (Yellow): 0 Special (White): None
Fire Hazard: 2, Red square Special Information: 4 Health hazard: 1 Reactivity hazard: 3
The number 4 on the NFPA 704 placard indicates the highest hazard in any of the three categories (health, fire, reactivity).
0-0-0
There are reports that tert-Butyl hydroperoxide has an NFPA 704 rating of 4-4-4, but it is not available in anything over 90 percent concentration, having 2-2-3. If you are ever in a place that needs such stuff, you are strongly urged to find a different job.
2-0-1-ox
Health (blue) 2 Fire (red) 0 Reactivity (yellow) 0
NFPA 704 Hazmat color codes: blue -- health hazard (4 being deadly) red -- fire hazard (4 being flash point below 73 F) yellow -- reactivity (4 may detonate) and white -- specific hazard (no water, radioactive, acid, alkali, corrosive, oxidizer)
Probably not. NFPA 1 "Hazard of Contents" are defined as High (with 5 levels), Ordinary or Low. The only occupancies that have "low" rating are those primarily for storage of non-combustibles. A church is primarily an assembly occupancy and could not be rated as "low hazard", based upon the risks to numerous human occupants. Types of occupancies other than "storage", even if incidentally storing non-combustibles, would qualify as an "ordinary" hazard, under the theory that some combustible materials will be introduced or hazardous operations conducted, or some psychological factor introduced in case of any fire or other emergency, thus requiring at least "ordinary" fire prevention and means of egress.
Life Safety Code, NFPA 101 ®, specifies the requirements for when fire doors are necessary, and what rating is required, in each different type of occupancy.
NFPA 1002 is the Standard for Driver Operator Professional Qualifications.