Flushing time definition

The definition of a random daytime sample is a sample that is taken at a random time of a working day directly from the tap in a property without previous flushing. When the sample is taken the tap should be fully opened or as open as possible without losing sample. The stagnation of water in the domestic distribution system influences the concentration of lead in a random manner. It is common practice to select the sampling points at random and for 1 litre sample volumes to be taken. 

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