This part of ISO 5667 provides guidance on sampling techniques necessary to obtain data for carrying out analyzes to control and characterize water quality and to identify sources of contamination. Specific instructions for specific sampling situations and sampling procedures are not included.
ONORM EN 25667-2-1994 history
1994ONORM EN 25667-2-1994 Water quality. Sampling. Part 2: Guidance on sampling techniques (ISO 5667-2:1991)