The Emergency Response Guidebook (ERG) was developed jointly by the U.S. Department of Transportation, Transport Canada, and the Secretariat of Communications and Transportation of Mexico (SCT) for use by firefighters, police, and other emergency services personnel who may be the first to arrive at the scene of a transportation incident involving a hazardous material.
The purpose of the ERG is to help responders quickly identify the specific or generic classification of the material(s) involved in the incident and protect themselves and the general public during the initial response phase of the incident.
The ERG is updated every three to four years to accommodate new products and technology.
DOT Chart 15
The U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration's hazardous materials marking, labeling and placarding guide.