Driver (CDL) - Placarding Subsidiary Hazards
Some hazardous materials have listed both a primary hazard and a subsidiary hazard in column 6 of the HMT. Under certain circumstances, both a primary hazard placard and a subsidiary hazard placard must be affixed for hazardous materials being shipped in transport vehicles, portable tanks, or unit load devices. The following subsidiary hazards require placards:
- Poison inhalation
- Uranium hexafluoride
- Dangerous when wet
Hazardous materials that possess subsidiary hazards may display subsidiary placards even if not required to be displayed.
To learn more about CDL HAZMAT Transportation visit our DOT Driver (CDL) HAZMAT Transportation Online Training web page.
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