- Y Diweddaraf sydd Ar Gael (Diwygiedig)
- Gwreiddiol (a wnaed Fel)
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Regulation 2
1. Subject to paragraph 2 below, the requirements for the classification DS4 are that—
(a)the annual mean concentration of each substance listed in column (1) of Table 1 in samples taken from the sampling point for the waters in question in accordance with regulation 4 above does not exceed the relevant limit shown in column (2); and
(b)the concentration of each substance listed in column (1) of Table 2 in each sample so taken does not exceed the relevant limit shown in column (2).
2. Where samples are taken in accordance with regulation 4 above from more than one sampling point in relation to the waters in question, the requirement in paragraph 1(a) above must be satisfied in relation to the samples from each sampling point.
(1) | (2) |
---|---|
Dangerous substance | Limit (in microgrammes per litre) (annual mean) |
Arsenic | 50 |
Atrazine and Simazine | 2 (for the two substances in total) |
Azinphos-methyl | 0.01 |
Dichlorvos | 0.001 |
Endosulphan | 0.003 |
Fenitrothion | 0.01 |
Malathion | 0.01 |
Trifluralin | 0.1 |
(1) | (2) |
---|---|
Dangerous substance | Limit (in microgrammes per litre) |
Tributyltin | 0.02 |
Triphenyltin and its derivatives | 0.02 |
Regulation 3
1. Subject to paragraphs 2 and 3 below, the requirements for the classification DS5 are that—
(a)the annual mean concentration of each substance listed in column (1) of Table 3 in samples taken from the sampling point for the waters in question in accordance with regulation 4 above does not exceed the relevant limit shown in column (2); and
(b)the concentration of each substance listed in column (1) of Table 4 in each sample so taken does not exceed the relevant limit shown in column (2).
2. Where samples are taken in accordance with regulation 4 above from more than one sampling point in relation to the waters in question, the requirement in paragraph 1(a) above must be satisfied in relation to the samples from each sampling point.
3. In relation to dichlorvos used as a treatment for sea-lice infestation, compliance with the relevant limit in column (2) of Table 4 shall be determined by reference only to samples taken as nearly as maybe after 24 hours have elapsed since it was so used.
(1) | (2) |
---|---|
Dangerous substance | Limit (in microgrammes per litre) (annual mean) |
Arsenic | 25 |
Atrazine and Simazine | 2 (for the two substances in total) |
Azinphos-methyl | 0.01 |
Dichlorvos | 0.04 |
Endosulphan | 0.003 |
Fenitrothion | 0.01 |
Malathion | 0.02 |
Trifluralin | 0.1 |
(1) | (2) |
---|---|
Dangerous substance | Limit (in microgrammes per litre) |
Dichlorvos | 0.6 |
Tributyltin | 0.002 |
Triphenyltin and its derivatives | 0.008 |
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