The hazardous material types listed in the guidelines for this permit include but are not limited to explosives, gas, flammable substances, poisons, radioactive materials, corrosive substances and toxins. Driving any vehicle from Class C, Class B or Class A which transports materials that could be harmful to the environment or human health will require a CA hazmat permit. This is the home of our California hazmat endorsement practice test, which is soon to be your greatest weapon in studying for the hazardous materials permit. Are you trying to ascertain which endorsements you will need for your commercial driver’s license? There are quite a few to choose from! If you think that you may require a California hazmat endorsement or “H” endorsement, the resources found on this page can help you.