S.L. 549.13 Art. 3Limit values for mercury discharges. S.L. 549.10 S.L. 54914

(1) The limit values, the time limits by which they shall be complied with and the monitoring procedure for discharges are laid down in Annex.

(2) Any person who operates an industrial plant shall ensure that when waste waters containing mercury leave the industrial plant, the limit values do not exceed such as may have been established:

Provided that when waste waters containing mercury are treated outside the industrial plant at a treatment plant intended for the removal of mercury, the competent authority may permit the limit values to be applied at the point where the waste waters leave the treatment plant.

(3) Without prejudice to their obligations arising from subregulations (1), (2) and (3) and to the provisions of the Pollution

Caused by Certain Dangerous Substances Discharged into the Aquatic Environment Regulations, the competent authority may grant a permit for new plants only if those plants apply the standards corresponding to the best technical means available when this is necessary for the elimination of pollution in accordance with regulation 3 of the Pollution Caused by Certain Dangerous Substances Discharged into the Aquatic Environment Regulations, or for the prevention of distortion of competition.

(4) The reference method of analysis to be used by the competent authority in determining the presence of mercury, shall be that given in Annex III (1) to of the Limit Values and Quality

Objectives for Mercury Discharges by the Chlor-alkali Electrolysis Industry Regulations. The competent authority may, where appropriate, use other methods, provided that the limits of detection, precision and accuracy of such methods are at least as good as those laid down in Annex III (1) to of the Limit Values and Quality Objectives for Mercury Discharges by the Chlor-alkali Electrolysis Industry Regulations. The accuracy required in the measurement of effluent flow is given in Annex III (2) to the said regulations.