Risk Management
This section is about risk managment plans and inspections that are continuously reviewed at
the site of the water system. This is different to the operational
dynamic
risk assessments performed on arrival at the site during an outbreak to protect the outbreak
control team staff.
Risk assessment is a method of identifying hazards and risks associated with the environmental
exposure to
Legionella and subsequent potential infection with Legionnaires' disease
during activities, and then implementing control measures. A risk assessment should document and
describe an existing system, then assess hazards and prioritise the risks. These risks and
controls can then be collated in a risk management plan that should be reviewed by suitably
trained and briefed people with accountability for control measures clearly stated. A general
risk assessment is not necessarily about health and safety of staff but about control and
maintenance of water systems and
Legionella levels within. Each site should have a risk
management plan, which takes the risk assessment and creates a process for monitoring and
validating the risks identified. Further guidance, from a UK perspective, is available from the
L8 Health and Safety Executive paper [HSE (2000) Legionnaires' disease
HSE, UK http pdf],
but other member states might have their own versions of such codes of practice. Similarly the
British Standard BS 8580:2010 (
Water Quality. Risk Assessments for
Legionella. Code of Practice) gives recommendations and guidance on the
assessment of the risk of legionellosis presented by artificial water systems.
Four phases exist in creating a risk management plan, which will be site
specific:
Assessment: risk based, prioritising hazards and risks in the system, what is
a safe or acceptable level of contamination in a system, where might aerosolisation occur
Monitoring: observe systems and check levels periodically, review installation
of new equipment
Management: maintain system, communicate issues, know
responsibility/accountability
Review: revise plan at suitable periods, check updates of national and
international guidance
Proper maintenance and management of potential aerosol generating facilities helps to prevent the
risk of Legionella outbreaks. Management of potential sources should be through thorough
and effective risk assessment.
The following risk management guidance and examples of paperwork used in the UK is available: