(2)
Council Directive 84/491/EEC of 9 October 1984 on limit values and quality objectives for discharges of hexachlorocyclohexane · European Union
(2) With the exception of quality objective 1.3, all concentrations relate to the arithmetic mean of the results obtained over one year.
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Source: EUR-Lex (Cellar) · retrieved 2026-11-05 · Text as adopted (Official Journal); later amendments are not incorporated in this text.