Hierarchy of Controls
Engineering Controls
When elimination or substitution is not possible, engineering controls should be applied.
When elimination or substitution is not possible, engineering controls should be applied. Engineering controls work by physically preventing worker exposure to the hazard by modifying tools, equipment, or machinery.
Engineering controls are considered a more effective control method as compared to administrative controls or PPE because they do not rely on worker compliance.
Well-designed engineering controls, such as a sealed container, can be highly effective in protecting workers from mercury. Engineering controls should be independent of worker behavior and interactions.
Potential engineering controls include:
- Using fume hoods to prevent exposure to mercury vapors
- Using a process enclosure to prevent exposure
- Controlling airflow in the work area with adequately designed ventilation systems
Knowledge Check Choose the best answer for the question.
1-5. Which control method can be considered effective at reducing mercury exposure by modifying tools, equipment, or machinery?
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