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ANNEX 1: SURFACE WATER QUALITY - PROPOSED STANDARDS FOR TEMPERATURE IN RIVERS
1. SEPA shall classify any river or part thereof designated as a cyprinid water under Directive 2006/44/EC as being of the Type "cyprinid" for the purpose of determining which of the standards for temperature specified in Table A below apply.
2. SEPA shall classify all rivers or parts thereof not classified as being of the Type "cyprinid" in accordance with paragraph 1 above as being of the Type "non-cyprinid" for the purpose of determining which of the standards for temperature specified in Table A apply.
3. Once SEPA has classified, in accordance with paragraphs 1 and 2 above, a river or part thereof as being of a Type specified in Row 2 of Table A below, it shall apply to that river or part, as applicable and subject to paragraph 4 below, the "high", "good", "moderate" or "poor" temperature standards specified in Row 3; Columns 2, 3, 4 and 5, respectively, and the "high" and "good" temperature standards specified in Row 4; Columns 2 and 3, respectively, of that Table.
Table A: Temperature standards for rivers
| Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
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Row 1 | | High | Good | Moderate | Poor |
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Row 2 | River temperature type | Non-cyprinid | Cyprinid | Non-cyprinid | Cyprinid | Non-cyprinid | Cyprinid | Non-cyprinid | Cyprinid |
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Row 3 | River temperature (°C) as an annual 98-percentile standard | 20 | 25 | 23 | 28 | 28 | 30 | 30 | 32 |
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Row 4 | Increase or decrease in temperature (°C) in relation to the ambient river temperature, as an annual 98-percentile standard | 2 | 2 | 3 | 3 | - | - | - | - |
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Note to Table A
The standards specified for temperature in Row 4; Columns 2 and 3 of Table A shall not be used for the purpose of classifying the status of bodies of surface water.
New definitions:
"Ambient river temperature" means the river temperature in degrees centigrade of a river or part thereof in the absence of any discharge or artificial recharge that would affect the river temperature of that river or part thereof.
"98-percentile standard" means a standard that is failed if the environmental quality metric to which the standard applies is greater than the standard for 2 % or more of the time.
"Environmental quality metric" means the concentration of a substance; the pH of water; the temperature of water; or a change in temperature in relation to ambient river temperature.
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