Australian Capital Territory Numbered Regulations

OCCUPATIONAL HEALTH AND SAFETY (GENERAL) REGULATION 2007 (NO 36 OF 2007) - REG 37

In this division:

"inhalable dust "means airborne particles of dust that can be taken in through the nose or mouth during breathing.

"safe oxygen level" means a minimum oxygen content in air of 19.5% by volume under normal atmospheric pressure and a maximum oxygen content in air of 23.5% by volume under normal atmospheric pressure.

"safe unclassified inhalable dust level" means a level of unclassified inhalable dust of 10mg/m ³ (TWA) or less.

"TWA" or time-weighted average means—

        (a)     for employees working standard hours—the average airborne concentration of a particular substance when calculated over an 8-hour working day for a 5-day working week;

        (b)     for employees working non-standard hours—the average airborne concentration of a particular substance taking into account any adjustment needed under the Australian Safety and Compensation Council Guidance Note on the Interpretation of Exposure Standards for Atmospheric Contaminants in the Occupational Environment , NOHSC 3008 (1995) 3rd Edition, part 5A.

"unclassified inhalable dust" means inhalable dust of a type that is not classified in the national exposure standards.

Note     National exposure standards —see the dictionary.

"unsafe oxygen level "means an oxygen level other than a safe oxygen level.

"unsafe unclassified inhalable dust level" means a level of unclassified inhalable dust other than a safe unclassified inhalable dust level.