The pre-blast survey offer must be made in writing at least how many hours prior to blasting?

The pre-blast survey offer must be made in writing at least how many hours prior to blasting?

• A. 24 hours
• B. 48 hours
• C. 72 hours
• D. 96 hours

Answer: (C)

The key idea here is that pre-blast communication must be timely and documented. Requiring the pre-blast survey offer to be in writing at least three days before blasting ensures that all affected parties have adequate time to review the plan, raise questions or concerns, and arrange any necessary inspections or mitigations. The written notice creates a clear, formal record that the safety and coordination steps were taken before blasting begins, which helps protect both the blaster and nearby property owners. Shorter notice can leave people with little time to respond or prepare, while three days is the minimum standard. So, the minimum is three days prior to blasting. For example, if blasting is planned for a Monday, the written offer should be delivered by Friday.

The key idea here is that pre-blast communication must be timely and documented. Requiring the pre-blast survey offer to be in writing at least three days before blasting ensures that all affected parties have adequate time to review the plan, raise questions or concerns, and arrange any necessary inspections or mitigations. The written notice creates a clear, formal record that the safety and coordination steps were taken before blasting begins, which helps protect both the blaster and nearby property owners. Shorter notice can leave people with little time to respond or prepare, while three days is the minimum standard. So, the minimum is three days prior to blasting. For example, if blasting is planned for a Monday, the written offer should be delivered by Friday.