Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a)
Detonating systems for hand-placed or hand-thrown charges.
(1) The initiation system on single-unit
handcharges shall consist of a fuse cap, safety fuse, and a fuse igniter or a
non-electric shock tube initiation system.
(2) Multiple units combined to form a single
handcharge may use the above initiation systems or an appropriate detonating
cord system.
(3) No other
initiation system shall be permitted unless accepted by the Division as
providing equivalent safety to the detonating systems allowed under subsections
(a)(1) and (2).
(b)
Detonating systems for multiple charge blasting.
(1) Detonating cord or non-electric shock
tube shall be used to connect multiple charge blasts.
(2) After all charges are placed, connected
to the detonating cord, and the charges are ready, a capped fuse, or a
non-electric shock tube initiation system shall be attached to the detonating
cord.
(c) Appropriate
fuse caps, for a particular explosive, shall be used.
(d) Safety Fuses.
(1) Water resistant safety fuse shall be used
in snow avalanche blasting.
(2) The
average burning rate per foot of safety fuse used shall be determined by
burning not less than three, 3-foot lengths of such fuse. Safety fuse which
varies more than 10 percent from the manufacturer's stated burning rate shall
not be used.
(3) Prior to use, the
average burning rate shall be re-determined as required by subsection (d)(2),
if the roll of safety fuse has not been fully used and is stored for future use
after blasting has been completed.
(4) A notice shall be conspicuously displayed
at the work location stating the burning rate of safety fuse used.
(5) Safety fuse shall be of sufficient length
to provide a minimum burning time of 90 seconds from ignition to
detonation.
(6) Cut ends of fuses
shall be protected from weather and physical damage.
(7) Damaged safety fuse shall not be
used.
(e) Cap and Fuse
Assembly.
(1) The caps and fuses shall be
assembled in a warm, dry, well-lighted environment.
(2) The location used for assembly shall not
have flammable and combustible liquids, flammable gases, or explosives present
where accidental detonation of the caps could create a secondary ignition or
detonation hazard.
(3) Caps shall
only be crimped to the fuse with a crimping tool approved for that
purpose.
(f) Fuse
Igniter.
(1) A fuse igniter, designed for that
purpose, shall be used for lighting safety fuse.
(2) The fuse igniter shall not be attached to
the safety fuse until immediately prior to time of ignition.
(3) The fuse igniter shall not be installed
on a damaged fuse.
(g)
Appropriate eye protection shall be worn pursuant to Section
3382 when handling or using
detonating systems or their components.
1. New
section filed 10-10-2007; operative 11-9-2007 (Register 2007, No.
41).
Note: Authority cited: Section
142.3, Labor
Code. Reference: Section
142.3, Labor
Code.
