Validation of alkaline disinfection for recycled water schemes

Despite the presence of a reasonably applicable guideline, the tasks undertaken at the Alcoa site were specifically assessed to help better estimate exposure since those given in the national guidelines were not necessarily intended to cover industrial uses. The microbial log reduction requirements of the scheme were determined using the default values stated in the Australian Guidelines for Water Recycling, as well as from using actual measured volumes from personal exposure monitoring. Margins of safety between alkaline disinfection capability and health requirements were identified and assessed.