I’m on the Australian Standards technical committee for Microbial Control in Building Warm Water Systems (Standard AS/NZS3666 parts 1, 2, & 3 + proposed part 4) as representative for Engineers Australia’s Society of Building Services Engineers (SBSE) and also for the Chartered Institute of Building Services Engineers.
One review issue I believe is worthwhile amending is that there are currently no audit referable docket sequential numbers required on water treatment service records. We believe that these could and should be introduced into the revised standard. At present the only thing we can use as a reference is the date, however this does not provide the unique referencing that auditors need.
Other similar auditable Building Services are required to have such sequentially numbered and referable records (fire protection services, HVAC & Smoke Control, etc).