Blasting operations shall be conducted during
daylight hours except when otherwise approved.
The handling and firing of explosives shall
be performed by the person possessing a permit to use explosives or
by employees under that person's direct supervision who are at
least 21 years old.
A. A person shall not handle explosives while under the
influence of intoxicants or narcotics.
B. A person shall not smoke or carry matches while handling
explosives or while in the vicinity thereof.
C. An open flame light shall not be used in the vicinity
of explosives.
At the site of blasting operations, a distance
of at least 150 feet (45,720 millimeters) shall be maintained between
Class II magazines and the blast area when the quantity of explosives
temporarily kept therein is in excess of 25 pounds (11.35 kilograms),
and at least 50 feet (15,240 millimeters) when the quantity of explosives
is 25 pounds (11.35 kilograms) or less.
Whenever blasting is being conducted in the
vicinity of gas, electric, water, fire, alarm, telephone, telegraph
or steam utilities, the blaster shall notify the appropriate representatives
of such utilities at least 24 hours in advance of blasting, specifying
the location and intended time of such blasting. Verbal notice shall
be confirmed with written notice. This time limit shall not be waived
except in an emergency as determined by the Fire Marshal and/or Chief
of Police.
Before a blast is fired, the person in charge
shall make certain that all surplus explosives are in a safe place,
all persons and vehicles are at a safe distance or under sufficient
cover and a loud warning signal has been sounded.
Due precautions shall be taken to prevent accidental
discharge of electric blasting caps from current induced by radio
or radar transmitters, lightning, adjacent power lines, dust storms
or other sources of extraneous electricity. These precautions shall
include:
A. The suspension of all blasting operations and removal
of persons from the blasting area during the approach and progress
of an electrical storm;
B. The posting of signs warning against the use of mobile
radio transmitters on all roads within 350 feet (106.75 meters) of
the blasting operations; and
C. Compliance with NFiPA 495 listed in Appendix A when blasting within 1 1/2 miles (2.41 kilometers)
of broadcast or high-power shortwave radio transmitters.
When blasting is done in congested areas or
in close proximity to a building, structure, railway, highway or any
other installation susceptible to damage, the blast shall be covered
before firing with a mat constructed so that it is capable of preventing
rock from being thrown into the air.