respond to fires involving hazardous materials, ensured that protective clothing was available to those responding, and expanded the fire prevention inspection program. Fire Marshal J. F. Morris developed the diamond shaped placard as a marking system to indicate when a building contained hazardous materials, with their levels of flammability, reactivity and health effects. See also Globally Harmonized System of Classification and Labeling of Chemicals Hazard symbol HMIS Color Bar Hazchem Hazmat References External links NFPA Standards Safety codes