The practical guideline applies to the examination of wastewater, surface water, sediment and sewage sludge. Since a sample can be taken under very different circumstances, it is virtually impossible to provide instructions that apply to all cases. Therefore, some general considerations and guidelines that should be taken into account are given below.
NPR 6600-1993 history
1993NPR 6600-1993 Waste water, surface water, sediment and sludge. Sampling