Hazardous materials
Hazardous materials questions test classification, communication, storage, and waste decisions. The CSMP candidate should be able to read an SDS, assign a DOT class, and recognize when a material becomes regulated waste.
Core rules and concepts
- The GHS-aligned OSHA Hazard Communication Standard (29 CFR 1910.1200) requires labels with signal words, pictograms, hazard statements, and a 16-section SDS.
- DOT regulates transport under 49 CFR Parts 171–180; there are nine hazard classes, and packing groups reflect degree of danger.
- Store incompatible materials separately; use the SDS and chemical compatibility guidance rather than unverified color codes.
- RCRA waste determination comes before accumulation. Satellite accumulation allows up to 55 gallons of hazardous waste or 1 quart of liquid acutely hazardous waste per container at or near the point of generation, with containers closed except when adding or removing waste.
- HAZWOPER (29 CFR 1910.120) governs emergency response and cleanup; training level must match duties.
Worked example
A liquid has a flash point of 80°F (about 27°C) and an initial boiling point of 100°F (about 38°C). It is a DOT Class 3 flammable liquid because the flash point is at or below 140°F (60°C). Because the flash point is at or above 23°C and the boiling point is above 35°C, it falls in Packing Group III. The reasoning matters: class comes from flash point, and packing group comes from the flash point/boiling point combination.
Traps that cost marks
Confusing a hazardous waste with a hazardous material, missing the accumulation start date, or assuming an SDS section 8 limit is a legal PEL. Also, a 'flammable' label alone does not establish the DOT packing group.