Section 1568.8 - Precautions-Accidental DischargeDue precautions shall be taken to prevent accidental discharge of electric blasting caps from current induced by radar, radio transmitters, lightning, adjacent power lines, sand or dust storms, or other sources of extraneous electricity. These precautions shall include:
1. The suspension of all blasting operations and removal of persons from the blasting area during the approach and progress of an electric storm, or sand or dust storms.2. The posting of signs warning against the use of mobile radio transmitters on all access roads between 1,000 feet and 3,000 feet of the blasting operations. The sign shall be in contrasting 8 inch letters on a white background and shall read: "BLASTING AREA--NO RADIO TRANSMITTING." Signs shall be displayed only at times of blasting.3. No electric blasting shall be done under overhead electric lines, or at such distance where it is possible for the blasting line to be blown in contact with any electric line unless the power in the energized line is shut-off or unless shot blow deflectors, hold downs, mats, logs, or other material are placed over the charge to confine the blast.4. When blasting near overhead electric lines, and when placing the lead and leg wires near these lines, the lead and leg wires shall not be placed parallel to the power line, and they shall be securely anchored.Cal. Code Regs. Tit. 19, § 1568.8