Which statement describes ALARA in relation to contaminants?

Which statement describes ALARA in relation to contaminants?

• A. ALARA applies to all contaminants in schedule 6 column 1
• B. ALARA applies only to methane
• C. ALARA does not apply
• D. ALARA applies to oxygen concentration

Answer: (A)

ALARA means keeping exposure to contaminants as low as reasonably achievable. In coal mining ventilation, this principle is applied to every contaminant listed in schedule 6 column 1, guiding you to implement controls that reduce concentrations to the lowest practical level, balancing safety with practicality and cost. It isn’t limited to methane or to oxygen levels; those are managed as part of different regulatory considerations. Because the regulation requires ALARA for all contaminants in that schedule, that statement best fits the concept.

ALARA means keeping exposure to contaminants as low as reasonably achievable. In coal mining ventilation, this principle is applied to every contaminant listed in schedule 6 column 1, guiding you to implement controls that reduce concentrations to the lowest practical level, balancing safety with practicality and cost. It isn’t limited to methane or to oxygen levels; those are managed as part of different regulatory considerations. Because the regulation requires ALARA for all contaminants in that schedule, that statement best fits the concept.