Project Appreciation and Objectives
Emergency events arise in water treatment and distribution that can compromise security of supply and water quality, e.g. short-term deterioration of raw water quality, power failure and instrument and equipment failure. Water companies have equipment available to deal with such events but, as emergency events are relatively infrequent, it is likely that fitness-for-purpose and performance of some of this equipment will not have been fully evaluated. Reliability may also be an issue where equipment has been stored for long periods, particularly where maintenance during storage has been inadequate.
This project will provide expert guidance to enable water companies to have in place appropriate technologies for emergency events to meet regulatory requirements with minimum disruption.
Benefits to Clients
- Improved technical capability to deal efficiently with emergency events to maintain supply and avoid regulatory failures.
- Improved specification and selection of equipment and cost savings resulting from sharing of equipment where feasible.
- Demonstrate to regulators a proactive approach to emergency events through risk assessments and drinking water safety plans (DWSPs).
- Review actual and potential emergency events identifying the causes, impacts on water supply and quality, treatment needs and mitigation options.
- Review equipment used in emergency events including type, manufacturer/supplier, size, portability, availability, performance and cost data; assess the feasibility of sharing emergency equipment.
- Evaluate the implementation and performance of equipment used to mitigate emergency events.
- Review guidance and regulatory issues relating to the emergency use of equipment and products. Emergency events will be characterised by a risk assessment frequency/ consequence approach that can be incorporated into DWSPs and emergency procedures.
A final report providing expert guidance including:
- A listing of emergency events identifying consequences to water supply matched by treatment needs and a list of mitigation options, supported by a spread-sheet-based database of equipment and manufacturers/suppliers.
- Characterisation of emergency events using a risk assessment frequency/consequence approach to update DWSPs and emergency procedures.
Related WRc Work
- Control of Cryptosporidium (risk assessment, membrane filtration, UV), UK water utilities and regulators, 2001-present,
- Disinfection best practice (reviews and implementation of chlorination, chloramination and UV), various UK water utilities, 2005-present.
- Long established capability and experience in control of algal problems and T&O complaints.