The Surface Waters (Shellfish) (Classification) (Scotland) Regulations 1997

Type Statutory-Instrument
Publication 1997-10-09
State In force
Department Queen's Printer of Acts of Parliament
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Made: 9th October 1997

Laid before Parliament: 28th October 1997

Coming into force: 18th November 1997

The Secretary of State, in exercise of the powers conferred on him by sections 30B and 104(1) of the Control of Pollution Act 19741, and, being a Minister designated2 for the purpose of section 2(2) of the European Communities Act 19723 in relation to measures relating to the prevention, reduction and elimination of pollution of water, in exercise of the powers conferred on him by that section, hereby makes the following Regulations:

Citation, commencement and interpretation

1

Classification of waters

2

The classification SFW (“shellfish waters”), and the criteria for that classification set out in the Schedule to these Regulations, shall apply for classifying controlled waters which are coastal and brackish waters for the purposes of Directive 79/923/EEC which need protection or improvement in order to support shellfish (bivalve and gasteropod molluscs) life and growth and thus contribute to the high quality of shellfish products directly edible by man.

Compliance with relevant requirements

3

Sampling and analysis

4

Derogations

5

The Scottish Environment Protection Agency may derogate from the requirements of these Regulations in the event of exceptional weather or geographical conditions.

Modification of section 30C of the Control of Pollution Act 1974

6

Section 30C of the Control of Pollution Act 19745 (water quality objectives) shall have effect–

Information required in connection with implementation of the Directive

7

SCHEDULE — CRITERIA FOR CLASSIFICATION OF WATERS AS SHELLFISH WATERS

No. in Annex to 79/923/EEC Parameter Units Requirements to be satisfied Reference methods of analysis Minimum sampling and measuring frequency
1 pH pH unit ≥7 and ≤9 Electrometry. Measured in situ at the time of sampling. Quarterly
3 Colouration (after filtration) mg Pt/1 A discharge affecting shellfish waters must not cause the colour of the waters after filtration to deviate by more than 10mg Pt/1 from the colour of waters not so affected. Filter through a 0.45 μm membrane Photometric method, using the platinum/cobalt scale. Quarterly
4 Suspended solids mg/1 A discharge affecting shellfish waters must not cause the suspended solid content of the water to exceed by more than 30% the content of waters not so affected. Filtration through a 0.45 μm membrane, drying at 105°C and weighing. Centrifuging (for at least five minutes, with mean acceleration 2,800 to 3,200g), drying at 105°C and weighing. Quarterly
5 Salinity ‰ ≤40‰ A discharge affecting shellfish waters must not cause their salinity to exceed by more than 10% the salinity of waters not so affected. Conductmetry. Monthly
6 Dissolved oxygen Saturation % ≥ 70% (average value) If an individual measurement indicates a value lower than 70% measurements shall be repeated. An individual measurement may not indicate a value of less than 60% unless there are no harmful consequences for the development of shellfish colonies. Winkler’s method. Electrochemical method. Monthly, with a minimum of one sample representative of low oxygen conditions on the day of the sampling. However, where major daily variations are suspected, a minimum of two samples in one day shall be taken.
7 Petroleum hydrocarbons Hydrocarbons must not be present in the shellfish waters in such quantities as to: produce a visible film on the surface of the water and/or a deposit on the shellfish, have harmful effects on the shellfish. Visual examination. Quarterly
8 Organohalogenated substances The concentration of each substance in the shellfish waters or in shellfish flesh must not reach or exceed a level which has harmful effects on the shellfish and their larvae. Gas chromatography after extraction with suitable solvents and purification. Half-yearly
9 Metals Silver Ag Arsenic As Cadmium Cd Chromium Cr Copper Cu Mercury Hg Nickel Ni Lead Pb Zinc Zn mg/1 The concentration of each substance in the shellfish waters or in the shellfish flesh must not reach or exceed a level which has harmful effects on the shellfish and their larvae. The synergic effects of these metals must be taken into consideration. Spectrometry of atomic absorption preceded, where appropriate, by concentration and/or extraction. Half-yearly
11 Substances affecting the taste of the shellfish Concentration should be lower than that which is liable to impair the taste of the shellfish. Examination of the shellfish by tasting where the presence of one of these substances is presumed.

Signed

Sewel — Parliamentary Under Secretary of State, Scottish Office — 9th October 1997

Explanatory note

(This note is not part of the Regulations)

These Regulations prescribe a system for classifying the quality of controlled waters which are coastal or brackish waters which need protection or improvement in order to support shellfish life and growth.

The classification SFW (“shellfish waters”) reflects the mandatory values assigned by Directive 79/923/EEC (on the quality required of shellfish waters) to the parameters listed in the Schedule to these Regulations.

The Regulations also incorporate the reference methods of measurement, and the minimum frequency required for sampling and analysis, laid down in that Directive for those parameters.

The Regulations, together with the Surface Waters (Shellfish) (Scotland) Directions 1997, transpose Directive 79/923/EEC in relation to Scotland. Copies of the Surface Waters (Shellfish) (Scotland) Directions 1997 may be obtained from the Environment Protection Unit, Scottish Office Agriculture, Environment and Fisheries Department, Victoria Quay, Edinburgh, EH6 6QQ.

Footnotes

1

1974 c. 40; section 30B was inserted, as part of a substitution of a new Part II of the Act, by the Water Act 1989 (c. 15) section 169 and Schedule 23, paragraph 4, and s104(1) was amended by the Water Act 1989, section 169 and Schedule 23, paragraph 7 and by the Environment Act 1995 (c. 25), Schedule 22, paragraph 29(34).

2

S.I. 1989/2393.

4

O.J. No. L 281, 10.11.1979, p.47.

5

1974 c. 40; section 30C was inserted by section 69 and paragraph 14 of Schedule 23 to the Water Act 1989 (c. 15) and was amended by section 120 and paragraph 29(2) and (4) of Schedule 22 to the Environment Act 1995 (c. 25).

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