(b)
Codified version
the maximum quantity of a substance permissible in a discharge during one or more specified periods of time, expressed, if necessary, as a unit of weight of the pollutant per unit of the characteristic element of the polluting activity (e.g. unit of weight per unit of raw material or per product unit).
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Source: EUR-Lex (Cellar) · retrieved 2026-10-13 · Text as adopted (Official Journal); later amendments are not incorporated in this text.