If field workers inadvertently enter a sprayed area, what must happen?

When field workers inadvertently enter a sprayed area, the operation must stop until everyone is out of the area. This is crucial for ensuring the safety of individuals who may be exposed to potentially harmful pesticides or chemicals used during the spraying process. Stopping the operation allows for a thorough assessment of the situation and ensures that all workers are safely evacuated from the treated area before any further application or re-entry occurs. This precaution helps to minimize health risks and follows safety protocols designed to protect both workers and the environment.

Other options do not align with safety best practices, as continuing operations in the presence of people can lead to exposure and possible health issues. Raising a warning flag or requiring only the operator to leave the area does not adequately address the safety of all personnel in the vicinity. Comprehensive safety measures dictate that operations must be halted until the area is clear of all individuals.