Electric blasting caps only shall be used for blasting operations in congested districts, or on highways, or adjacent to highways open to traffic, or within brush or grass covered lands, except where sources of extraneous electricity make such use dangerous.
Cal. Code Regs. Tit. 19, § 1570
Note: Authority cited: Section 12081, Health and Safety Code. Reference: Sections 12000-12401 inclusive, Health and Safety Code.