New Jersey Administrative Code
Title 12 - LABOR AND WORKFORCE DEVELOPMENT
Chapter 190 - EXPLOSIVES
Subchapter 7 - USE OF EXPLOSIVES
Section 12:190-7.9 - Warning signs and signals

(a) A sign indicating blasting warning signals shall be posted at one or more conspicuous places where blasting operations are being conducted. The blaster shall set adequate time sequences between warning signals to give the public sufficient time to take cover. The lettering on such signs shall be not less than four inches in height on a contrasting background. The asterisk on the sign example indicates the time fixed by the blaster. The sign shall read as follows or express an equivalent:

(b) Warning signs shall be posted 350 feet from all approaches to the blasting area open to the public. The lettering on such signs shall be not less than four inches in height on a contrasting background, and the signs shall read as follows or express an equivalent:

(c) Warning signs shall be placed on the right shoulder of all public vehicular approaches 350 feet from blasting sites, utilizing electric blasting caps. The lettering on such signs shall be not less than four inches in height on contrasting background, and the signs shall read as follows or express an equivalent:

(d) The person conducting blasting operations shall fix the time of blasting, check the blast area, post guards to keep all unauthorized persons out of the blast area, and sound the warning signals utilizing an effective warning device.

(e) When a warning device has been sounded, all persons not authorized to be in the blast area shall leave or take cover and not return until the all clear signal has been sounded.

(f) Warning signs shall be removed or covered when blasting or loading is not being performed.