150.1(1)An employer shall ensure that only biodegradable electronic explosives are used in a seismic blasting operation.
150.1(2)If a seismic blasting operation is carried out in an isolated location, loaded holes may be left unattended only if a blaster has ensured that
(a)
the leg wires of the detonator are folded and shunted, the drill cuttings are spread out and levelled and the leg wires are coiled as close to the ground as possible while never exceeding 15 cm above the ground level, and
(b)
the holes are suitably identified, recorded in the blasting log and blasted within 30 days after they are loaded.
150.1(3)If a blaster can confirm complete detonation of explosives in a seismic blasting operation, the firing line may be left connected to the firing switch and disconnected at the hole.
150.1(4)A misfired charge in a seismic blasting operation may be left unfired only if
(a)
the charge is in an isolated location at a depth sufficient to minimize the risk of injury to employees or other persons and cannot be conventionally and safely detonated, and
(b)
the location of the charge is effectively marked and the employer keeps a permanent record of the location.