Section 27-19. Hazardous and flammable substances in connection with rock work

Measures shall be taken to consider quantities and concentrations of hazardous and potentially explosive substances in the air.
When measures are in place that are activated automatically, records shall be kept of measured values as provided for in the HSE plan.
Smoking is prohibited in areas subject to particular fire or explosion hazards. It is also prohibited to use open flame, and to carry out work that can entail an ignition hazard unless adequate safety precautions are taken to prevent the occurrence of fires or explosions. When working underground in mines or quarries where hazardous gases could be present or in mines containing flammable dust, it is also prohibited to carry smoking tobacco or any object that can be used to produce a flame.
When working underground in mines or quarries where hazardous gases could be present or in mines containing flammable dust, torch cutting, welding and similar work may only be carried out by way of exception. Where an exception is made, special measures shall be taken to safeguard the health and safety of employees.