A recent Estates and Facilities Alert issued by Health Facilities Scotland (HFS) has noted that contamination of water supplies was found in two recent projects within NHS Scotland. Extensive testing traced the source to the cold water storage tanks which gave TVC (Total Viable Count) readings for Pseudomonas in excess of 500cfu/100ml (after 72-hour incubation). TVC readings fell to 0cfu/100ml immediately after disinfecting the tanks but had reverted to high levels at later re-testing.
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