57.6602—Static electricity dissipation during loading.
When explosive material is loaded pneumatically into a blasthole in a manner that generates a static electricity hazard—
(a)
An evaluation of the potential static electricity hazard shall be made and any hazard shall be eliminated before loading begins;
(b)
The loading hose shall be of a semiconductive type, have a total of not more than 2 megohms of resistance over its entire length and not less than 1000 ohms of resistance per foot;
(d)
Conductive parts of the loading equipment shall be bonded and grounded and grounds shall not be made to other potential sources of extraneous electricity; and