# The Surface Waters (Dangerous Substances) (Classification) Regulations 1992 S.I. 1992/337 · made 20 February 1992 These Regulations prescribe a system of classifying the quality of relevant territorial waters, coastal waters and inland freshwaters. Made under: Sporting Events (Control of Alcohol etc.) (Amendment) Act 1992 (repealed) (Section 82, Section 102, Section 219) ## Introductory text WATER, ENGLAND AND WALES Made 20th February 1992 Laid before Parliament 28th February 1992 Coming into force 20th March 1992 The Secretary of State for the Environment and the Secretary of State for Wales, acting jointly in exercise of the powers conferred on them by sections 82, 102 and 219(2) of the Water Resources Act 1991 and of all other powers enabling them in that behalf, hereby make the following Regulations: ## 1 Citation and commencement These Regulations may be cited as the Surface Waters (Dangerous Substances) (Classification) Regulations 1992 and shall come into force on 20th March 1992. ## 2 Classification of waters (1) A system employing the classification DS3 is prescribed as a system of classification applying to relevant territorial waters, coastal waters and inland freshwaters. (2) The criterion for the classification DS3 is that the annual mean concentration of each substance listed in column (1) of the Schedule in samples taken and tested in accordance with these Regulations must not exceed the relevant concentration specified in column (2) of the Schedule. ## 3 Sampling and analysis (1) The provisions of this regulation apply as respect the taking and testing of samples of any waters to which the classification DS3 is for the time being applied. (2) Samples must be taken in relation to such waters at a frequency sufficient to show any changes in the aquatic environment, having regard in particular to natural variations in hydrological conditions. (3) Where a discharge containing any substance listed in column (1) of the Schedule is made to such waters, samples must be taken at a point sufficiently close to the discharge point to be representative of the quality of the aquatic environment in the area affected by the discharge. (4) Samples taken in relation to such waters shall be analysed using the relevant reference methods of measurement specified in column (3) of the Schedule or other methods which have limits of detection, precision and accuracy at least as good. ## 4 Modification of section 83 of the Water Resources Act 1991 Section 83 of the Water Resources Act 1991 shall have effect as if— (a) it imposed a duty on the Secretary of State to exercise his powers under that section to apply the classification DS3 to all relevant territorial waters, coastal waters and inland freshwaters; and (b) in relation to the establishment of water quality objectives in pursuance of that duty, subsections (4) and (5) of that section were omitted. ## Signature Michael Heseltine Secretary of State for the Environment 19th February 1992 Signed by authority of the Secretary of State for Wales Wyn Roberts Minister of State, Welsh Office 20th February 1992 ## Schedule THE CLASSIFICATION OF RELEVANT TERRITORIAL WATERS, COASTAL WATERS AND INLAND FRESHWATERS (DS3) (1) (2) (3) Substance Concentration in microgrammes per litre (annual mean) Reference method of measurement Note The accuracy and precision of the method must be plus or minus 50% at a concentration which represents twice the value of the limit of determination. 1,2-Dichloroethane 10 Gas chromatography with electron capture detection after extractionby means of an appropriate solvent or gas chromatography following isolation by means of the “purge and trap” process and trapping by using a cryogenically cooled capillary trap. The limit of determination is 1μg/l. ( see Note ) Trichloroethylene 10 Gas chromatography with electron capture detection after extractionby means of an appropriate solvent. The limit of determination is 0.1μg/l. ( see Note ) Perchloroethylene 10 Trichlorobenzene 0.4 (but there must be no significant increase over time in the concentration of trichlorobenzene in sediments and/or molluscs and/or shellfish and/or fish). Gas chromatography with electron capture detection after extraction by means of an appropriate solvent or, when used to determine the concentration in sediments and organisms, after appropriate preparation of the sample. The limit of determination for each isomer separately is 10 ng/l for the water environment and 1μg/kg of dry matter for sediments and organisms. ( see Note ) ## Explanatory note (This note is not part of the Regulations) These Regulations prescribe a system of classifying the quality of relevant territorial waters, coastal waters and inland freshwaters. The classification DS3 prescribed by the Regulations reflects the quality objectives specified in the Annex to Council Directive 90/415/EEC which amends Annex II to Council Directive 86/280/EEC on limit values and quality objectives for discharges of certain dangerous substances included in List I of the Annex to Council Directive 76/464/EEC. The system of classification prescribed by the Regulations will be used for establishing quality objectives under section 83 of the Water Resources Act 1991. Sampling requirements are specified in regulation 3 and the Secretary of State will use his powers under section 5 of the Water Resources Act 1991 to direct the National Rivers Authority to sample and test waters to which classification DS3 applies in accordance with those requirements. Regulation 4 modifies section 83 of the Water Resources Act 1991 for the purpose of complying with Community obligations arising under Council Directive 90/415/EEC. It imposes a duty on the Secretary of State to use his powers under section 83 to apply the classification DS3 to territorial waters up to three miles out, coastal waters and inland freshwaters. It also dispenses with the requirements of section 83(4) and (5) (representations and objections) in cases where the Secretary of State is performing that duty. --- Source: https://www.legislation.gov.uk/uksi/1992/337 (the official version) Page: https://openlegislation.uk/surface-waters-dangerous-substances-classification-regulations-1992 Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.