A. The storage, transportation and use of explosives shall be performed in compliance with all local, state and federal laws and under the supervision of a competent, experienced person.
B. The owner/user shall notify the city in advance of the use of explosives on the job.
C. All blasts shall be fired electrically with an electric blasting machine or properly designed electric power source except as provided in section 9-2-6 of this chapter.
D. Where detonating cord is used as the detonating agent, the detonating cord shall be fired with an electric blasting cap, except as provided in section 9-2-6 of this chapter.
E. Delay electric detonators or detonating cord connections shall be used for all delayed blasts.
F. Waterproof electric blasting caps or detonating cord shall be used for subaqueous blasting.
G. All operations involving the handling or use of explosives shall be discontinued and personnel moved to a safe area during approach or progress of either a thunderstorm or severe dust storm.
H. Blasting machines, regardless of types, shall be maintained and used only as prescribed by the manufacturer.
I. Blasting machines shall be tested prior to use as periodically thereafter as prescribed by the manufacturer.
J. Blasting machines shall be secured, and accessible only, to the blaster.
K. Warning signs shall be provided at points of access to the blasting area.
L. When energy for blasting is taken from power circuits, the voltage shall not exceed five hundred fifty (550) volts. The wiring and controlling arrangements shall conform to the following:
1. The blasting switch shall be an ungrounded Underwriters' Laboratory listed, enclosed, externally operated double-pole, double-throw switch which when locked in the open position will shunt the firing lines.
2. A grounded switch shall be installed between the blasting switch and the power circuit at a distance not less than six feet (6') from the blasting switch.
3. A lightening gap of at least six feet (6') shall be provided between the two (2) switches. The gap connection shall be made by cable, plug and receptacle.
M. The cable between switches shall be disconnected and both switches shall be locked in the open position immediately after firing the shot and before any person is permitted to return to the blasting area.
N. Key to the switches shall remain in the possession of the blaster at all times.
O. Insulated solid core wires of appropriate gauge in good condition shall be used for all lines.
P. Sufficient firing line shall be provided to permit the blaster to be located at a safe distance from the blast.
Q. The use of black powder shall be prohibited.
R. All loading and firing shall be directed and supervised by one designated person. All holes loaded on a shift should be fired on the same shift whenever possible and no loaded holes shall be left unattended overnight or until the next shift.
S. Blasting operations in the proximity of overhead power lines, communications lines, utility services or other structures shall not be carried on until the operators and/or owners have been notified and measures for safe control have been taken.
T. Blasting operations in or adjacent to cofferdams, piers or underwater structures shall be carefully planned with full consideration for all forces and conditions involved.
U. Dynamite used in tunnel blasting shall be fume class I.
V. Surface blasting shall be confined to daylight hours unless otherwise permitted by the city. (Ord. A-348, 6-4-1979)