- Latest available (Revised)
- Original (As made)
The Surface Waters (Shellfish) (Classification) Regulations 1997
You are here:
What Version
More Resources
Status:
This is the original version (as it was originally made). This item of legislation is currently only available in its original format.
Regulations 2, 3 and 4
SCHEDULECRITERIA 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 | Coloration (after filtration) | mg Pt/l | A discharge affecting shellfish waters must not cause the colour of the waters after filtration to deviate by more than 10 mg Pt/l 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/l | A discharge affecting shellfish waters must not cause the suspended solid content of the waters 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 | Conductimetry | 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 lower 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 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:
| Visual examination | Quarterly | |
| 8 | Organo-halogenated 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
| mg/l
| 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 |
Options/Help
Print Options
PrintThe Whole Instrument
PrintThis Schedule only
Legislation is available in different versions:
Latest Available (revised):The latest available updated version of the legislation incorporating changes made by subsequent legislation and applied by our editorial team. Changes we have not yet applied to the text, can be found in the ‘Changes to Legislation’ area.
Original (As Enacted or Made): The original version of the legislation as it stood when it was enacted or made. No changes have been applied to the text.
Opening Options
Different options to open legislation in order to view more content on screen at once
More Resources
Access essential accompanying documents and information for this legislation item from this tab. Dependent on the legislation item being viewed this may include:
- the original print PDF of the as enacted version that was used for the print copy
- lists of changes made by and/or affecting this legislation item
- confers power and blanket amendment details
- all formats of all associated documents
- correction slips
- links to related legislation and further information resources
All content is available under the Open Government Licence v3.0 except where otherwise stated. This site additionally contains content derived from EUR-Lex, reused under the terms of the Commission Decision 2011/833/EU on the reuse of documents from the EU institutions. For more information see the EUR-Lex public statement on re-use.