1361.10 DRILL HOLE REGULATIONS.

   (a)    All drill holes shall be sufficiently large to freely admit the insertion of the cartridges of explosives. Tamping shall be done only with wooden rods without metal parts.

   (b)    No holes shall be loaded except those to be fired at the next round of blasting. After charging, all remaining explosives shall be immediately returned to the magazine. Drilling shall not be started until all remaining butts of old holes are examined with a wooden stick for unexploded charges, and if any are found, same shall be refired before work proceeds.

   (c)    No person shall be allowed to deepen drill holes which have contained explosives. Explosives shall not be extracted from a hole that has once been charged or has misfired unless it is impossible to detonate the unexpired charge by insertion of a fresh additional primer or by drilling a hole in close proximity and at a safe distance from the unexploded charge.

(Ord. 74-27. Passed 5-20-74.)