- (1) After a blast is fired, loosened pieces of rock shall be scaled from the sides of the excavation and after the blasting is completed, the entire working chamber shall be thoroughly scaled.
- (2) The person in charge shall inspect the working chamber and have all loose rock or ground removed and the chamber made safe before proceeding with the work.
- (3) Drilling must not be started until all remaining butts of old holes are examined for unexploded charges.
[ 1941 c 194 s 17; Rem. Supp. 1941 s 7666-25.]