What is the hierarchy control method when a policy states that no more than 2 workers can occupy the same room simultaneously to reduce chemical exposure?

Correct answer: C. Administrative controls

• A. Substitution involves replacing a hazardous material with a safer one — a staffing policy is not substitution.
• B. Elimination removes the hazard entirely — a staffing limit does not eliminate the exposure, just reduces it.
• C. Correct. Administrative controls involve changing how work is organized or scheduled to reduce hazard exposure. Limiting the number of workers in a room at the same time is an administrative control (work practice control).
• D. Engineering controls physically modify the workplace (e.g., ventilation systems, fume hoods) — a staffing policy does not change the physical environment.