# Council Directive of 12 June 1986 on the protection of the environment, and in particular of the soil, when sewage sludge is used in agriculture (86/278/EEC), Division 1: Soil sampling

Extent: E+W+S+N.I.

The representative soil samples for analysis should normally be made up by mixing together 25 core samples taken over an area not exceeding 5 hectares which is farmed for the same purpose.
The samples must be taken to a depth of 25 cm unless the depth of the surface soil is less than that value; however, the sampling depth in the latter case must not be less than 10 cm.

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Source: https://www.legislation.gov.uk/eudr/1986/278/annex/6/division/1 (the official version)
Page: https://openlegislation.uk/eu-directive-1986-278/annex-6/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.