Blog Posts by Roy Sullivan
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Roy Sullivan

Roy has extensive experience in legal and statutory standards, along with clinical guidelines, corporate governance and industry best practice across many disciplines, including Fire, Water, Medical and Natural Gas, Ventilation, Boiler and Pressure systems and power systems.
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Recent Posts

Expansion Vessels and Legionella risk
Expansion vessels are an important integral part of pressurised hot and cold-water systems, particularly in larger systems such as hospitals. They can also be referred to as pressure vessels or...
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Legionella record keeping using software.
Water Hygiene Guidance When managing Legionella and other waterborne pathogens we must keep concise, accurate records of all our activities. HSG274 Part 2 sections 24 – 26 and HTM04-01 Part B Para...
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Legionella sampling: Part 3 - Testing methods & what next?
As a recap on the firstand second parts of this blog series on sampling, we’ve already covered; sampling strategy, taking a water sample and the chain of custody. In this final blog of the series,...
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Legionella sampling: Part 2 - technique & chain of custody
Last week we looked at the planning process required before any samples are taken. This week we get down to the ‘nuts and bolts’ of bottle filling.
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Legionella sampling: Part 1 - What's your sampling strategy?
Sampling of water systems for Legionella, Pseudomonas aeruginosa or bacteriological can be somewhat daunting, with thoughts of ‘do I need to sample’, ‘how to take a sample’ and ‘where should I send...
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Legionella Incident Investigation – What’s involved?
Sampling for Legionella should be routinely carried out as indicated by your Legionella risk assessment. A sampling plan can then be created. BS8554 and BS7592-2022 Sampling for Legionella bacteria...
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I have a Pseudomonas aeruginosa count – what next?
To understand the actions that should be taken when a positive Pseudomonas aeruginosa [P. aeruginosa] test result is received, it is prudent to first understand more about this opportunistic...
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BS 7592: 2022 Sampling for Legionella - What’s new?
BS 7592 has recently undergone a re-write which resulted in extensive changes. There are 3 new annexes with greater emphasis being placed on the competency of all involved in the sampling process.
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Most common ways of contracting Legionnaires’ Disease.
Legionnaires’ disease was first recognised in July 1976 and since then more than 60 species have been identified. It is a naturally occurring organism and can be found in ponds, rivers, and lakes....
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