Western Australian Consolidated Regulations

MINES SAFETY AND INSPECTION REGULATIONS 1995 - REG 9.1

9.1 .         Terms used

                In this Part, unless the contrary intention appears — 

        asbestos removal work means any work involving the removal or sealing of installed thermal or acoustic insulation material which consists of, or contains, asbestos in a concentration of more than 1% by weight;

        atmospheric contaminant means any potentially harmful substance in a workplace that is naturally absent from air, or is present in the workplace in an unnaturally high concentration, and to which employees may be exposed;

        bulk depot means a depot within premises in which dangerous goods are stored in bulk;

        contaminant asbestos means crocidolite, chrysotile, grunerite (amosite), or the asbestiform varieties of actinolite, tremolite or anthophyllite present in rock in or about the mine;

        dust plan , in relation to an underground coal mine, means the plan prepared for that mine under regulation 9.35;

        exposure standard for an atmospheric contaminant, means — 

            (a)         the standard specified in the Exposure Standards for Atmospheric Contaminants in the Occupational Environment; or

            (b)         in relation to an atmospheric contaminant for which a different standard is determined by the Minister under regulation 9.2, such standard as is determined;

        Exposure Standards for Atmospheric Contaminants in the Occupational Environment means the “Adopted National Exposure Standards for Atmospheric Contaminants in the Occupational Environment” [NOHSC:1003 (1995)] declared by the NOHSC and published in May 1995;

        Guidance Note on the Membrane Filter Method for Estimating Airborne Asbestos Fibres means the “Guidance Note on the Membrane Filter Method for Estimating Airborne Asbestos Fibres” 2 ^nd Edition [NOHSC:3003 (2005)] declared by the NOHSC and published in April 2005;

        inhalable dust has the same meaning as in AS 3640;

        package depot means a depot in which packages are stored;

        peak , in relation to an exposure standard, means the maximum airborne concentration of an atmospheric contaminant determined over the shortest analytically practicable period of time which does not exceed 15 minutes;

        respirable dust has the same meaning as in AS 2985;

        short term exposure limit or STEL , in relation to an exposure standard, means a concentration of atmospheric contaminant averaged over a period of 15 minutes;

        TWA concentration means the time weighted average concentration of an atmospheric contaminant when calculated over a normal 8 hour working period during a 5 day working week;

        ventilation log book means the book referred to in regulation 9.7;

        ventilation officer , in relation to a mine, means a person appointed to be a ventilation officer for the mine under regulation 9.3.

        [Regulation 9.1 amended in Gazette 4 Apr 2005 p. 1109; 21 Jul 2009 p. 2925‑6.]