# The Surface Waters (Dangerous Substances) (Classification) (Scotland) Regulations 1992

S.I. 1992/574 · made 9 March 1992

These Regulations, which extend to Scotland only, prescribe a system of classifying the quality of relevant territorial waters, coastal waters and inland waters.

Made under: Control of Pollution Act 1974 (Section 30B, Section 55A, Section 104, Section 105)

## Introductory text

PUBLIC HEALTH, SCOTLAND
Made 9th March 1992
Laid before Parliament 11th March 1992
Coming into force 1st April 1992
The Secretary of State, in exercise of the powers conferred on him by sections 30B, 55A, 104(1) and 105(1) of the Control of Pollution Act 1974 and of all other powers enabling him in that behalf, hereby makes the following Regulations:

## 1 Citation, commencement and extent

These Regulations may be cited as the Surface Waters (Dangerous Substances) (Class ification) (Scotland) Regulations 1992, shall come into force on 1st April 1992 and shall extend to Scotland only.

## 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 waters.
(2) The criterion for the classification DS3 is that the annual mean concentration of each substance listed in column (1) of the Schedule hereto in samples taken and tested in accordance with these Regulations must not exceed the relevant concentration specified in column (2) of that Schedule.

## 3 Sampling and analysis

(1) Samples must be taken in relation to the waters at a frequency sufficient to show any changes in the aquatic environment, having regard in particular, to natural variations in hydrological conditions.
(2) Where a discharge containing any substance listed in column (1) of the Schedule is made to the 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.
(3) Samples taken in relation to the 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 30C of the Control of Pollution Act 1974

Section 30C of the Control of Pollution Act 1974 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 waters; 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

James Douglas-Hamilton
Parliamentary Under Secretary of State, Scottish Office
St. Andrew’s House,
Edinburgh
9th March 1992

## CLASSIFICATION OF RELEVANT TERRITORIAL WATERS, COASTAL WATERS AND INLAND WATERS (DS3)

(1)
(2)
(3)
Substance
Concentration in microgrammes per litre (annual mean)
Reference method of measurement
>Notes
1. 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.
2. There must be no significant increase over time in the concentration of trichlorobenzene in sediments and/or molluscs and/or shellfish and/or fish.
1, 2-Dichloroethane
10
Gas chromatography with electron capture detection after extraction by 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 1)
Trichloroethylene, Perchloroethylene
10
Gas chromatography with electron capture detection after extraction by means of an appropriate solvent. The limit of determination is 0.1μg/l. (See Note 1)
Trichlorobenzene
0.4
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 10ng/l for the water environment and 1μg/kg of dry matter for sediments and organisms. (See Notes 1 and 2)

## Explanatory note

(This note is not part of the Regulations)
These Regulations, which extend to Scotland only, prescribe a system of classifying the quality of relevant territorial waters, coastal waters and inland waters.
The classification DS3 prescribed by the Regulations reflects the quality objectives specified in the Annex to Council Directive 90/415/EEC (OJ No. L219, 14.8.90, p.49) which amends Annex II to Council Directive 86/280/EEC (OJ No. L181, 4.7.86, p.16) 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 (OJ No. L129, 18.5.76, p.23).
The system of classification prescribed by the Regulations will be used for establishing quality objectives under section 30C of the Control of Pollution Act 1974. Sampling require ments are specified in regulation 3 and the Secretary of State will use his powers under section 54 of the Control of Pollution Act 1974 to direct the river purification authorities to sample and test waters to which classification DS3 applies in accordance with those requirements.
Regulation 4 modifies section 30C of the Control of Pollution Act 1974 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 30C to apply the classification DS3 to relevant territorial waters, coastal waters and inland waters. It also dispenses with the requirements of section 30C(4) and (5) (representations and objections) in cases where the Secretary of State is performing that duty.

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Source: https://www.legislation.gov.uk/uksi/1992/574 (the official version)
Page: https://openlegislation.uk/surface-waters-dangerous-substances-classification-scotland-regulations-1992
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.