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Surveillance: with regard to the regular monitoring, Member States shall ensure access to installations in priority premises for the purposes of sampling and may set up a monitoring strategy, in particular as regards Legionella pneumophila, which are responsible for the majority of cases of legionnaire's disease in the Union.”
Based on the much higher concentrations observed in first draw samples, even after a short stagnation, the first 250mL should be discarded unless no sources of lead are present .Results question the cost-benefit of daily or weekly flushing as a remediation strategy.