(1)         In this Chapter—

"major incident", at a major hazard facility, is an occurrence that—

            (a)         results from an uncontrolled event at the major hazard facility involving, or potentially involving, Schedule 15 chemicals; and

            (b)         exposes a person to a serious risk to health or safety emanating from an immediate or imminent exposure to the occurrence.

        (2)         Without limiting subregulation (1), "occurrence" includes any of the following:

            (a)         escape, spillage or leakage;

            (b)         implosion, explosion or fire.