No, blasting firms are only required to warn personnel in the blasting area so they can retreat to a safe location. When a blast is about to be fired, ample warning shall be given to allow all persons to retreat to a safe place, and care shall be taken to ascertain that all persons are in the clear. Each blaster shall follow a definite plan of warning signals that can be clearly seen or heard by anyone in the blasting area.
The blasting area is the area in which explosives loading and blasting operations are being conducted, including the blast site and the immediate adjacent area within the influence of flying rock, missiles, and concussion.