3.9.2 Validation of processes

Summary of actions

• Validate processes and procedures to ensure that they are effective in controlling hazards.

• Revalidate processes periodically or when variations in conditions occur.

Validation involves evaluating the scientific and technical information that is available on processes and then, where necessary, undertaking further investigations, in order to validate system-specific operational procedures, critical limits and target criteria. The aim of process validation is to ensure effective operation and control. Historical data and operational experience can also be useful sources of information. It is important that the validation considers the totality of multiple treatment barriers in achieving the health-based targets.

Processes should be revalidated on a regular basis or when variations occur (e.g. seasonally). Any new processes should be tested using benchtop, pilot-scale or full-scale experimental studies to confirm that the process and operational criteria produce the required results under the conditions specific to the individual water supply system.

Section 9.8 provides more information on validation of processes.