S.L. 549.10 ст. 7Limit values.

(1) The competent authority shall lay down the limit values which the emission standards may not exceed for the various dangerous substances included in the families and groups of substances within List I. These limit values shall be determined by:

(a) the maximum concentration of a substance permissible in a discharge, and

(b) where appropriate, the maximum quantity of such a substance expressed as a unit of weight of the pollutant per unit of the characteristic element of the polluting activity (such as the unit of weight per unit of raw material or per product unit). Where appropriate, limit values applicable to industrial effluents shall be established according to sector and type of product. The limit values applicable to the substances within List I shall be laid down mainly on the basis of -

(i) toxicity,

(ii) persistence,

(iii) bioaccumulation, taking into account the best technical means available.

(2) The competent authority shall lay down quality objectives for the substances within List I. These objectives shall be laid down principally on the basis of the toxicity, persistence and bioaccumulation of the said substances in living organisms and in sediment, as indicated by the latest conclusive scientific data, taking into account the difference in characteristics between salt-water and fresh water.