9Requirements for cooling water systems

#### 9 Requirements for cooling water systems 9 Requirements for cooling water systems > > (1) For the Act, section 27, a cooling water system used solely for making snow is exempt from the operation of the Act, Part 3, Division 2. > > > (2) For the Act, section 28, a cooling water system must be installed in accordance with AS/NZS 3666.1:2011 > > > (3) For the Act, section 29— > > > > > (a) a cooling water system must be operated as required by AS/NZS 3666.2:2011, and > > > > > (b) a cooling water system must be equipped with a disinfection procedure that is in operation at all times and designed to control microbial growth so that— > > > > > > > (i) the level of *Legionella* in the system is less than 10 colony-forming units per millilitre, and > > > > > > > (ii) the heterotrophic colony count in the system is less than 100,000 colony-forming units per millilitre, and > > > > > (c) there must be safe and easy access to a cooling water system for the purposes of the cleaning, inspection and maintenance of the system.