The record of the assessment is a living document that must be reviewed regularly to ensure it remains up-to-date.

Based on our experience over the last 20 years and Best Practice Alchem recommend to review the risk assessment for cooling towers annually whilst for other premises we recommend to continue the biennial frequency.

The Responsible Person should ensure the Legionella bacteria risk assessment remains up-to-date and current.
Services and Products - Legionella Bacteria and Pseudomonas Aeruginosa Risk Assessments
It is a legal duty to carry out a Legionella bacteria risk assessment and assess whether there is a risk posed by exposure to Legionella from the water systems in the premises.

The risk assessment should consider all aspects of the water system(s) and, whilst there will be common factors it should be specific to that individual system.

Legionella bacteria risk assessments for evaporative cooling towers and hot and cold water systems in hospitals, manufacturing sites, health care premises, care homes, office buildings, shared premises, schools and residential accommodation each require a very different approach and a different type of assessment.

The Alchem risk assessment team are highly experienced and Alchem use a unique scoring matrix to identify the factors which increase the risk of exposure for all of these different types of property.

The record of the assessment is a living document that must be reviewed to ensure it remains up-to-date.

An indication of when to review the assessment and what to consider, should be recorded, eg.

(a) changes to the water system or its use
(b) changes to the use of the building in which the water system is installed
(c) the availability of new information about risks or control measures
(d) the results of checks indicating that control measures are no longer effective
(e) changes to key personnel
(f) a case of legionnaire's disease/legionellosis associated with the system

Our Legionella bacteria risk assessment complies fully with the British Standard BS8580 and the recently revised Approved Code of Practice L-8 “The control of Legionella bacteria in water systems” and the associated technical guidance HSG274.

The assessment may have indicated that there may be reasonably foreseeable risk from exposure arising from the water systems on site if these are not monitored or controlled.

Once the risk is identified and assessed, a Written Scheme should be prepared, implemented and properly managed by the Responsible Person. The Written Scheme should specify the various control measures and how to use and carry out these measures. Alchem staff will be able to help you prepare a bespoke Written Scheme for the water services on your site.

For hospitals and health services, Achem can also undertake a Pseudomonas Aeruginosa Risk Assessment which assesses both, the operational management as well as clinical practice to establish risk levels.
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