In the hierarchy of controls, which control is the first level?

• A. PPE
• B. Substitution
• C. Isolate
• D. Elimination

Answer: (D)

Elimination removes the hazard from the process entirely, so exposure cannot occur. Because the hazard is gone at the source, there’s no risk to manage, and no reliance on equipment effectiveness, correct procedures, or people’s behavior. That’s why it sits at the top of the hierarchy—the most effective way to protect people. For example, redesigning a process so the hazardous step isn’t needed, or removing a dangerous material from the system all together eliminates the risk at its origin. If elimination isn’t possible, you’d look at substitution (replacing the hazard with something less dangerous), then engineering controls to isolate or guard the hazard, followed by administrative controls and PPE. The other approaches can fail due to improper use, maintenance gaps, or human error, whereas elimination shuts the hazard down at its source.