The hazard rating for the laboratory is determined by looking at all the chemicals in the laboratory and coming up with rating for each hazard category based on criteria established below. Health Use the most severe rating code regardless of volume. The greatest volume of one code determines the marking. The only exception is if a more severe code has a volume of 3 gallons or greater, then that code is used instead of a lower code of greater volume. If the laboratory total volume of flammables or combustibles is less than one pint for all, then the rating for the laboratory for this area shall be zero.
Reactivity Use the most severe rating code regardless of volume.
Special Information Indicate the presence of the following regardless of volume.