What should high‑risk substances have?

• A. PPE only
• B. Specific and detailed assessments and control methods
• C. Training only
• D. General guidelines

Answer: (B)

High-risk substances require a formal, documented risk assessment and a set of specific, task-focused control measures. The assessment identifies how exposure could occur, who is at risk, which processes and substances are involved, and how often exposure might happen. From that, you implement concrete controls: engineering measures to contain or vent the hazard, administrative controls such as safe work procedures and rotation to limit exposure, and appropriate PPE used correctly as a final safeguard. Training and supervision are essential, but only when tied to the assessment and the actual controls; without a detailed assessment, guidelines are too vague, and PPE alone cannot prevent exposure. This combination ensures the specific hazards are recognized and mitigated for each scenario, which is why it is the best approach.