(1) A mine operator must, so far as is reasonably practicable, ensure that the ventilation in a place where a person may be present at the mine is sufficient to achieve a healthy atmosphere.Penalty: In the case of (a) a body corporate, a fine not exceeding $13 000; and(b) an individual, a fine not exceeding $6 500.(2) The mine operator of an underground mine must ensure that the mines ventilation system is designed, installed, maintained, and monitored, so that (a) so far as is reasonably practicable, the ventilation circuits at the mine do not allow airflows to recirculate; and(b) ventilating air does not pass through so many work areas that it becomes unfit to breathe; and(c) contaminated air is not used for ventilation; and(d) ventilating air provided for the mine is of sufficient volume, velocity, and quality, to remove atmospheric contaminants resulting from blasting and other mining operations; and(e) structures that regulate airflows are maintained in operating condition; and(f) all major ventilating fans, air doors, brattices or other ventilating devices or controls in use at the mine are recorded on the mine plans.Penalty: In the case of (a) a body corporate, a fine not exceeding $13 000; and(b) an individual, a fine not exceeding $6 500.(3) The mine operator must ensure that (a) persons are prevented from entering an enclosed or underground area at the mine until the mine operator is satisfied that there is adequate ventilation in the area; and(b) procedures are established and followed at the mine to ensure that, following blasting activities in the mine, persons do not enter any area where (i) toxic, asphyxiant or explosive gases arising from the blasting have not been effectively dispersed; or(ii) the mine may not contain a safe level of oxygen.Penalty: In the case of (a) a body corporate, a fine not exceeding $13 000; and(b) an individual, a fine not exceeding $6 500.