A hazard assessment should be conducted before and during a job to ensure a safe working environment through risk identification and mitigation measures.
A hazard assessment should be performed before the job begins and periodically as the job is being performed. This assessment involves identifying potential hazards, evaluating risks, and implementing measures to mitigate those risks to ensure a safe working environment. For example, in the case of the Sasol explosion mentioned, a failure to conduct a proper risk assessment led to tragic consequences. Regular risk assessments help prevent such incidents by proactively addressing safety concerns.
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