Blasting (Explosives)
A person must hold a valid California Blaster’s License
and must be physically present when performing, directing,
and supervising blasting operations. 5238(a)
A. Blaster’s License requirements are discussed in 344.20.
B. All blasting accidents affecting worker safety must be
reported to DOSH within 24 hours. 5248(a)
Note: Accidents involving a serious injury or illness
must be reported to DOSH within 8 hours. 342(a)
C. Explosives must be stored in the proper type of magazine
(see 5252
Table EX-1). 5251(a)
D. Caps and detonators must be stored in separate magazines
away from other explosives. 5251(b),
(c)
E. Storage requirements are discussed in 5251,
5252,
5253.
F. Transportation requirements are discussed in Subchapter
7 Article 115 (Index).
G. Safety rules for blasting operations are as follows:
- No smoking or open flames are permitted within 50 ft.
of explosives handling. 5276(a)
- No source of ignition, except during firing, is permitted
in areas containing loaded holes. 5276(a)
- Only non-sparking tools are to be used for opening containers
of explosives. 5276(b)
- Explosives must be kept clear of electrical circuits
by 25 ft. 5276(d)
- Unused explosives must be returned promptly to the magazine.
5276(e)
- Blasting mats must be used when flying material could
damage property. 5276(f)
- A tally sheet that records all movement of explosives
must be kept at each magazine. 5251(n)
- Holes may be loaded only after all drilling is complete
(see exception in 5278(a)). 5278(a)
- No vehicle traffic should pass over loaded holes. 5278(c)
- Loaded holes must be attended. 5278(o)
- Workers must not try to quench an explosive’s fire.
5276(l)
- Explosives at a blast site must be attended. 5278(o)
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