Hazardous materials regulations and definitions
Hazardous materials regulations and definitions
This domain tests whether you can apply the 49 CFR definition of a hazardous material, identify who is a hazmat employee, and separate shipper duties from carrier and driver duties.
Core rules
- Under 49 CFR 171.8, a hazardous material is a substance or material that DOT has determined can pose an unreasonable risk to health, safety, or property when transported in commerce. The term includes hazardous substances, hazardous wastes, marine pollutants, and elevated-temperature materials.
- A hazmat employee is anyone who directly affects hazmat transportation safety, including drivers, loaders, unloaders, packagers, markers, labelers, and people who prepare shipping papers. Employers must provide general awareness, function-specific, safety, and security awareness training; in-depth security training is required when a security plan applies.
- Training is repeated every three years, and records must be kept. The CDL hazardous materials endorsement requires a knowledge test and a TSA security threat assessment, but the endorsement does not replace employer hazmat training.
- Shippers classify, package, mark, label, and describe the material. Carriers and drivers must refuse improperly prepared shipments and must inspect, load, secure, and park correctly.
Worked example
A warehouse worker loads 55-gallon drums, checks labels, and signs the shipping paper. Is the worker a hazmat employee? Yes. Loading and signing directly affect safety, so the worker needs function-specific training. The driver's H endorsement is separate; the driver still needs employer hazmat training for these duties.
Traps
Do not assume only drivers are hazmat employees, that training is annual, or that a CDL H endorsement alone satisfies 49 CFR 172 Subpart H. Do not accept a shipment just because it has a label; check the shipping paper and package condition.