What are the components of the hierarchy of controls, and provide one example of each in a BEE setting?

• A. Elimination (remove hazard), substitution (use less hazardous chemical), engineering controls (fume hood/ventilation), administrative controls (work practices, rotation), PPE.
• B. Replacement; Cleanup; Monitoring; Emergency response; Training.
• C. Avoidance; Negotiation; Outsourcing; Certification; Decontamination.
• D. Control by detection; Isolation; Evacuation; Elixir.

Answer: (A)

The hierarchy of controls is a sequence of hazard-reduction strategies ranked from most to least effective: eliminate the hazard, substitute with something less hazardous, implement engineering controls, apply administrative controls, and use personal protective equipment. In a BEE setting this means:

Elimination means removing the hazard from the process entirely, such as redesigning a workflow so a particularly dangerous chemical is no longer part of the operation.

Substitution involves using a less hazardous chemical or material in place of the more dangerous one, for example swapping a toxic solvent for a safer alternative solvent.

Engineering controls rely on the design of the workplace or equipment to reduce exposure without relying on worker behavior, such as installing a fume hood or local exhaust ventilation, or using closed systems and proper containment.

Administrative controls are changes in how people work to reduce exposure, including implementing safe work practices, standard operating procedures, training, and rotating tasks to limit time exposed.

PPE is the last line of defense and protects the worker when other controls cannot fully eliminate exposure, such as wearing gloves, goggles, or a respirator.

The other options don’t reflect this arranged, comprehensive hierarchy. They mix elements like monitoring, emergency response, or only partial aspects of safety practices, which aren’t the established sequence of controls used to minimize occupational exposure in BEE.