DIN ISO 5667-5:2011-02

The guidance given in this part of ISO 5667 is confined to those circumstances where water is drawn from municipal or similar distribution systems (including individual systems) where prior treatment and/or quality assessment has resulted in the water being classified as suitable for drinking or potable process purposes. Specifically, this part of ISO 5667 is applicable to water that is in continuous supply relative to any stage of use up to and including the point of consumption in a distribution system. This means that distribution within large buildings in which additional water quality management might be applicable is also included. This part of ISO 5667 is also applicable to sampling situations that can arise relative to the investigation of distribution system defects or emergency situations where the safety of sampling operatives is not compromised. This part of ISO 5667 does not apply for water sources or for products generated by using drinking water. The followings items are examples of cases not addressed by the present document: - sampling of source water, groundwater and surface water impoundments (barrages) - sampling of drinking water supplies derived from non-continuous sources (for example, from road tankers) - sampling from bulk storage of water on airplanes, trains and ships - sampling of beverage products (including bottled waters) or food containing potable water used in its preparation - sampling of drink vending machines that dispense unsealed cups of drinks. The International Standard on which this standard is based has been prepared by ISO/TC 147/SC 6/WG 6 "Drinking water and water used for food and beverage processing". The standard has been prepared by Working Group "Probenahme" ("Sampling") (NA 119-01-03-01-01 AK) of NA 119-01-03 AA "Wasseruntersuchung" ("Water analysis") of NAW and been funded by the Länderfinanzierungsprogramm "Wasser, Boden und Abfall" (federal funding programme "Water, soil and waste"). With regard to DIN 38402-14:1986-03, the following changes have been made: a) the title has been changed; b) the method has been updated and considerably extended, especially with regard to the following points: - the selection of the sampling locations within the treatment and distribution systems has been incorporated; - requirements for the cleaning, disinfection and flushing before sampling have been incorporated; - execution of sampling and handling has been concretized; - quality assurance measures have been incorporated; c) the standard has been editorially revised.