12. Explosives for granite quarries

The licensee of a granite quarry shall ensure that —

explosives used for charging holes are those approved by the Arms and Explosives Branch of the Singapore Police Force and the explosion is initiated by a combination of safety fuse, cord, detonating cordtex and detonators approved by that Branch;

at least a minimum of one metre of fuse shall be outside each hole, and, if the number of holes to be fixed at any one time is more than 20, prior approval of the Licensing Officer in writing shall be obtained; and

all material brought down or blown out after blasting shall be carefully examined for any cartridges or pieces of cartridges which have remained unexploded and shall be removed.