At UNSW, persons must not enter or work in or on a confined space unless authorised by an entry permit issued by Facilities Management. All work must comply with the NSW WHS Regulation 2011 (Chapter 4, Part 4.3, Division 3 - Working in Confined Spaces).
Please note: "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.
Examples of confined spaces
Examples of confined spaces are as follows:
- storage tanks, tank cars, process vessels, boilers, pressure vessels, silos and other tank- like compartments
- open-topped spaces such as pits or degreasers
- pipes, sewers, shafts, ducts and similar structures
- shipboard spaces entered through a small hatchway or access point, cargo tanks, cellular double bottom tanks, duct keels, ballast and oil tanks and void spaces (but not including dry cargo holds).
