Australian Capital Territory Numbered Regulations Australian Capital Territory Numbered RegulationsIn 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.
"time-weighted average" (or TWA ) means—
(a) for workers 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; or
(b) for workers 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.
"TWA"—see time-weighted average .
"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.