Rank: New forum user 
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I was curious to find out how others are managing the water hygiene on their mobile welfare units and temporary accommodation units on construction sites. Are people getting 3rd party risk assessors in, are hire companies providing generic assessments, or have you become trained in carrying them out yourself. My background prior to working in H&S was plumbing and heating, so I have a good understanding of hot & cold water systems. Unsure of whether to do the IOSH course they offer or the BOHS 901, or not to bother at all and just get 3rd party in. Edited by user 21 July 2023 14:10:42(UTC)
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Rank: Super forum user
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Hi mdmx33 Particularly with your stated background I wouldn't recommend ANY course NOR getting a third party in. Follow the guidance. You are NOT going to have long runs of dead leg pipework and it should be relatively easy to keep the hot water HOT and the cold water COLD. So, you don't have water being stored for lengthy periods at a temperature of between 20 and 50C. Remember that in most environments legionella presents such a tiny risk that nobody even invented the concept of legionella until the 1970s. Edited by user 22 July 2023 12:44:48(UTC)
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 1 user thanked peter gotch for this useful post.
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Rank: Super forum user 
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If you do control your "ground hog" units rather than hire them good practice (your evidence of control) is to ensure water systems are drained after site use and the systems are flushed before refilling prior to use. Site units as Peter mentions are normally in regular use cycling fresh water in to the systems - do however beware that extended periods of non-occupation should also be pre-empted by draining systems and then flushing through before use.
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Rank: Super forum user
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If you do control your "ground hog" units rather than hire them good practice (your evidence of control) is to ensure water systems are drained after site use and the systems are flushed before refilling prior to use. Site units as Peter mentions are normally in regular use cycling fresh water in to the systems - do however beware that extended periods of non-occupation should also be pre-empted by draining systems and then flushing through before use.
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