Responders should cordon off how much distance from a trench during a rescue?

The correct answer, which specifies a distance of 100 feet from the trench, is based on best practices for ensuring responder safety and public safety during trench rescue operations. When responding to incidents involving trenches, it is crucial to establish a safe perimeter to mitigate risks associated with potential trench collapse, falling debris, and other hazards.

Setting a cordon of 100 feet helps to protect responders and bystanders from the potential dangers associated with a trench failure which could occur suddenly and without warning. This distance allows for safe operations, enabling rescue teams to work effectively while maintaining a buffer zone to avoid injury.

The selection of this distance is also reflective of guidelines from safety organizations and regulatory bodies that advise responders on maintaining a safe working environment in proximity to excavations. It ensures that all personnel involved in a rescue are within a manageable range while still being far enough away to avoid the risks inherent to trench accidents.