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§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;
 
(c)
Wire-countered hoses shall not be used;
 
(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
 
(e)
Plastic tubes shall not be used as hole liners if the hole contains an electric detonator.

   Reason: