# The Sludge (Use in Agriculture) Regulations 1989, Paragraph 4

Extent: E+W+S

Each representative sample shall be analysed so as to ascertain–
(a) the pH value of the sample;
(b) the concentration in that sample of the following metals–
(i) chromium;
(ii) the elements set out in the soil table below.

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Source: https://www.legislation.gov.uk/uksi/1989/1263/schedule/2/paragraph/4 (the official version)
Page: https://openlegislation.uk/sludge-use-in-agriculture-regulations-1989/schedule-2/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.