L8 Water Training Ltd 0800 612 4698 Tel: 0800 612 4698 Email: [email protected]Website: L8watertrainingservicesltd.co.uk UK Company Registration No. 09687824 VAT Registered: No. 225 1867 09 Domestic Hot & Cold Water Services Log Book Please ensure that a copy of the current building’s Risk Assessment along with the Schematic is kept with this log book. This log book is NOT issued as part of a contract agreement between this company and L8 Water Training Ltd. L8 Water Training Ltd are not responsible for any results recorded within this log book. The log book is a free business aid designed to assist a Responsible Person in achieving HSG274 Part 2 compliance and is issued without payment.
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UK Company Registration No. 09687824 VAT Registered: No. 225 1867 09
14. Management of Water Systems
Action: Responsibility: Frequency:
Review Risk Assessment
This is to ensure that the original assessment remains valid and that no changes have been made to the system, which would compromise its safety. If significant changes have been made to the water systems, the usage of the building, or if there has been an outbreak of Legionnaires’ disease, a new risk assessment is required.
Two-yearly or following major structural alterations/Change of owner.
Review Legionella Risk Management Plan. This is to ensure that all the remedial actions have been carried out and that all recommended procedures have been implemented and remain effective.
Yearly
Review the Monitoring & Control strategies. This is to ensure that where control measures have deviated from the normal safe operating conditions, appropriate actions have been taken and recorded.
Yearly
Provide Legionella awareness training to all personnel responsible for the safe operation of the water systems. System operators should be trained to a suitable level to enable them to recognise potentially hazardous situations as they arise, and to be able to take appropriate remedial actions to restore the system to a safe operating condition
Review yearly
6th monthly water analysis on drinking water
Bi Annually
Clean & Disinfect CWST
By arrangement
Legionella testing as required (recommended if outlet temperatures show continued deviation from safe limits or if other control strategies have failed).
UK Company Registration No. 09687824 VAT Registered: No. 225 1867 09
HSG274 Part 2 Hot & Cold Water Systems - Table 2.1: Checklist for hot and cold water systems
proposed information which can formulate a Written Scheme
System
Ref
Service Action to take Frequency Assigned to
of aerosols
Regularly use the outlets to minimise the risk
from microbial growth in the peripheral parts
of the water system and sustain and log this
procedure once started, as lapses can result
in a critical increase in legionella at the outlet
For high risk populations e.g. healthcare and
care homes, more frequent flushing may be
required as indicated by the risk assessment
Before carrying out the above procedures,
consideration should be given to removing
infrequently used showers, taps and any
associated equipment that uses water. If
removed, any redundant supply pipework
should be cut back as far as possible to a
common supply (eg to the recirculating
pipework or the pipework supplying a more
frequently used upstream fitting) but
preferably by removing the feeding ‘T’.
Thermostatic
Mixing
Valves
(TMV)
Risk assess whether the TMV fitting is required, and if not, then remove.
Where needed, inspect, clean, descale and disinfect any strainers or filters associated with TMVs
To maintain protection against scald risk, TMVs require regular routine maintenance carried out by competent persons in accordance with manufacturer’s instructions.
Annually or on a
frequency
defined by the
risk assessment,
taking account of
any
manufacturers
recommendations
Expansion
Vessels
Where practicable, flush through and purge
to drain.
Monthly - six
monthly based on
the assessment of
risk
Infrequently used outlets
Consideration should be given to removing infrequently used showers, taps and any associated equipment that uses water. If removed, any redundant supply pipework should be cut back as far as possible to a common supply (e.g. to the recirculating pipework or the pipework supplying a more frequently used upstream fitting) but preferably by removing the feeding ‘T’ Infrequently used equipment within a water
UK Company Registration No. 09687824 VAT Registered: No. 225 1867 09
HSG274 Part 2 Hot & Cold Water Systems - Table 2.1: Checklist for hot and cold water systems
proposed information which can formulate a Written Scheme
System
Ref
Service Action to take Frequency Assigned to
system (i.e. not used for a period equal to or greater than seven days) should be included on the flushing regime.
Flush the outlets until the temperature at the outlet stabilises and is comparable to supply water and purge to drain – Regular flushing of the dental chairs is carried out.
Regularly use the outlets to minimise the risk from microbial growth in the peripheral parts of the water system, sustain and log this procedure once started.
UK Company Registration No. 09687824 VAT Registered: No. 225 1867 09
Appendix C
Emergency Procedure in the Event of an Outbreak. The nominated person (Head of Facilities Management) will be informed of a suspected case of Legionnaires ‘disease. If a case is suspected then the Health and Safety Advisor and Property Services Manager will normally work in association with the Public Health Laboratory Service and the local CCDC to search for the source of the causative organism. It is essential that systems are not drained or disinfected before samples have been taken. The Facilities Management Departments role is an important one – identifying the various water systems within the building and, in particular, to the points from which samples can be taken. Easy access to these sampling points is essential. An investigating team will be established under the guidance of the Duty Holder, this will normally comprise of the staff listed in Appendix . The investigation will concentrate upon all potential sources of Legionella infection, including:
the domestic hot and cold water distribution system showers or spray washing equipment drainage system and traps humidifiers in ventilation systems cooling coils in air-conditioning systems any other water based system
To assist in such investigations, the Building Manager must be able to provide details of all associated equipment, including all documentation. He must assist by advising the investigating team on the extent of servicing on the site, and by locating taps and sample points. Information will also be required, such as whether there have been any local excavation or earthmoving works, alterations to water supply systems or drainage systems or any other factors which may have a bearing on the site. The team is responsible for identifying the cause of infection, and will advise on cleaning, disinfection, any modifications, and long-term control measures.
UK Company Registration No. 09687824 VAT Registered: No. 225 1867 09
Course of Action in the Event of an Outbreak. In England and Wales, legionnaires’ disease is notifiable under the Health Protection (Notification) Regulations 201036 and in Scotland under the Public Health (Notification of Infectious Diseases) (Scotland) Regulations 1988.37 Under these Regulations, human diagnostic laboratories must notify Public Health England (PHE), Public Health Wales (PHW) or Health Protection Scotland (HPS) (see ‘Further sources of advice’) of microbiologically confirmed cases of legionnaires’ disease. An outbreak is defined as two or more cases where the onset of illness is closely linked in time (weeks rather than months) and where there is epidemiological evidence of a common source of infection, with or without microbiological evidence. An incident/outbreak control team should always be convened to investigate outbreaks. It is the responsibility of the Proper Officer to declare an outbreak. The Proper Officer, appointed by the Local Authority, is usually a Consultant in Communicable Diseases Control (CCDC) in England and Wales, or the Consultant in Public Health Medicine (CPHM) in Scotland. If there are suspected cases of the disease, medical practitioners must notify the Proper Officer in the relevant local authority. Local Authorities will have jointly established incident plans to investigate major outbreaks of infectious diseases, including legionellosis, and it is the Proper Officer who activates these and invokes an Outbreak Committee, whose primary purpose is to protect public health and prevent further infection. HSE or local Environmental Health Officers may be involved in the investigation of outbreaks, their aim being to pursue compliance with health and safety legislation. The local authority, Proper Officer or EHO acting on their behalf will make a visit for public health reasons, often with the relevant officer from the enforcing authorities (ie HSE or the local authority) for health and safety reasons. Any infringements of relevant legislation may be subject to a formal investigation by the appropriate enforcing authority. There are published guidelines (by PHE, PHW and HPS) for the investigation and management of incidents, clusters, and outbreaks of Legionnaires’ disease in the community. These are, for England and Wales, Guidance on the Control and Prevention of Legionnaires’ Disease in England38 and for Scotland, Guidelines on Management of Legionella Incidents, Outbreaks and Clusters in the Community.39
If a water system is implicated in an outbreak of Legionnaires ’ disease, emergency treatment of that system should be carried out as soon as possible. This will usually involve the processes detailed in paragraphs 2.124–2.135 within the HSE document HSG274: Part 2 (Hot & Cold Water Systems). As part of the outbreak investigation and control, the following requests and recommendations may be made by the enforcing authority:
(a) To shut down any processes which are capable of generating and disseminating airborne
water droplets and keep them shut down until sampling procedures and any remedial cleaning or other works has been done. Final clearance to restart the system may be required.
(b) To take water samples from the system before any emergency disinfection being undertaken. This will help the investigation of the cause of the illness. The investigating officers from the local authorities may take samples or require them to be taken.
(c) To provide staff health records to discern whether there are any further undiagnosed cases of illness and to help prepare case histories of the people affected.
(d) To co-operate fully in an investigation of any plant that may be suspected of being involved in the cause of the outbreak. This may involve for example
UK Company Registration No. 09687824 VAT Registered: No. 225 1867 09
a. Tracing of all pipe work runs b. Detailed scrutiny of all operational records c. Statements from plant operatives and managers d. Statements from water treatment contractors or consultants
Any infringements of relevant legislation may be suspect to a formal investigation by the appropriate enforcing authority. If a water system other is implicated in an outbreak of Legionnaire’s Disease, emergency treatment of that system should be carried out as soon as possible.