An employee mixing pesticides with the signal word "DANGER" may work alone at night if what condition is met?

The correct condition for an employee mixing pesticides with the signal word "DANGER" to work alone at night involves making contact with a responsible adult by radio every hour. This stipulation is critical for ensuring safety, especially when handling highly toxic substances. The signal word "DANGER" indicates a high level of toxicity, which implies significant health risks in case of an emergency.

By requiring the employee to maintain regular communication with a responsible adult, the protocol ensures that someone is aware of their situation and can promptly intervene if anything goes wrong. This requirement is part of a broader safety standard aimed at minimizing risks associated with pesticide handling and ensuring that adequate support is available in case of accidents or exposure.

While other conditions, like working in a secure location, having first aid training, or being within reach of a co-worker, might contribute to safety, they do not provide the same level of assurance as the necessity to check in with a responsible person. The emphasis on communication aligns with best practices for safety in environments where hazardous materials are handled, reinforcing the importance of accountability and response readiness.