(1) This section applies if a hazard is in a mine’s work environment and at least 1 of the following apply to a worker at the mine—(a) the worker’s work cycle does not conform to the standard work cycle used in establishing the general exposure limit for the hazard;(b) the worker’s work cycle decreases the rate at which the worker recovers from adverse effects of the hazard;(c) the effects of a hazard on the worker may increase if the worker does heavy strenuous work or works under adverse climatic conditions.
(2) The site senior executive must ensure the exposure limit applying to the worker for the hazard is adjusted to account for the circumstances mentioned in subsection (1).
(3) If the national standard for the hazard or NOHSC’s guidance note states a way of adjusting the general exposure limit for the hazard in the circumstances, the site senior executive must ensure the exposure limit applying to the worker for the hazard is adjusted in the stated way.
(4) If the work environment at a mine contains hazards that interact with each other to increase their adverse effects on a worker, the site senior executive must ensure the exposure limits that apply to the worker for the hazards are adjusted to account for the interaction.
(5) In this section—
"NOHSC’s guidance note" means NOHSC’s document called ‘Guidance Note on the Interpretation of Exposure Standards for Atmospheric Contaminants in the Occupational Environment 3rd edition [NOHSC:3008 (1995)]’.
"standard work cycle" , generally, means a work cycle consisting of—(a) a shift of not longer than 8 hours a day; and(b) not more than 5 shifts a week; and(c) at least 16 hours between consecutive shifts.