If preventing exposure to hazardous substances is not practicable, which method should be considered next?

When preventing exposure to hazardous substances is not feasible, controlling exposure through ventilation or enclosure is the next logical step because it aims to reduce or minimize the risk of harm to individuals. This method involves implementing measures that either extract hazardous substances from the environment or isolate them effectively, thereby lowering the concentration of these substances in the air and limiting the potential for inhalation or contact.

Ventilation systems can help to dilute hazardous fumes, dust, or vapors, while enclosure can physically separate the hazardous materials from workers. This approach prioritizes the safety of employees and helps to maintain a healthier workplace environment by mitigating risk without entirely relying on individuals to protect themselves.

Other approaches, such as using personal protective equipment exclusively, may not adequately address all potential exposure scenarios and can also leave workers vulnerable if the equipment fails or is not used correctly. Environmental monitoring is more about observing the situation rather than actively controlling exposure. Lastly, the complete elimination of all chemicals is often impractical in many work environments, as certain substances may be essential for operational purposes, and thus controlling exposure is the most effective and realistic alternative.