27-365. Regulation of underground use of
internal combustion engines
The underground use of any internal combustion engine is declared unlawful, unless
after application filed with the inspector he approves the equipment for safe use in the
type of underground work for which the application is filed and finds that the
atmospheric conditions in the underground workings where the equipment is to be used are
such that the operation of such equipment will not endanger the health or safety of any
employee. If the application is approved by the inspector, the operation of the
designated equipment shall be lawful only if and so long as it is operated and maintained
in accordance with recommendations made public from time to time by the inspector, and
only upon the condition that when air quality becomes unsafe operation of the equipment
shall be stopped by the operator until air quality again becomes safe either by
increasing ventilation or by correcting mechanical imperfections in the equipment,
whichever is found to be the cause of the unsafe quality of the air.
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