Western Australian Consolidated Regulations

DANGEROUS GOODS SAFETY (MAJOR HAZARD FACILITIES) REGULATIONS 2007 - REG 9

9 .         Determining the critical quantity of Schedule 1 substances at a place or likely to be at a place

        (1)         In this regulation —

        threshold quantity , for a Schedule 1 substance, is the threshold quantity determined under regulation 10.

        (2)         For the purposes of these regulations, more than the critical quantity of Schedule 1 substances is at a place, or is likely to be at a place, if —

            (a)         in the case of a place where only one Schedule 1 substance is present, or is likely to be present, more than 10% of the threshold quantity for the substance is at the place, or is likely to be at the place, as the case requires; or

            (b)         in the case of a place where more than one Schedule 1 substance is present, or is likely to be present, the application of the following formula to those substances produces a result greater than 0.1 —

                where —

        x, y … and n         are the different Schedule 1 substances at the place, or likely to be at the place, as the case requires (excluding any substance that is at the place, or likely to be at the place, as the case requires, in a quantity less than 2% of its threshold quantity); and

        qx, qy … and qn         are the quantities of x, y … and n at the place, or likely to be at the place, as the case requires; and

        Qx, Qy … and Qn         are the threshold quantities for x, y … and n.