regulation 3(7)
1. Subject to paragraph 2, the criteria for the classification DS7 are that the annual mean concentration of each substance listed in column (1) of Table 9 in samples taken from the sampling point for the waters in question in accordance with regulation 4 does not exceed the relevant limit shown in column (2) of that Table.
2. Where samples are taken in accordance with regulation 4 from more than one sampling point in relation to the waters in question, the criterion in paragraph 1 shall be satisfied in relation to the samples from each sampling point.
(1) | (2) |
---|---|
Substance | Limit (in microgrammes per litre) (annual mean) |
4-Chloro-3-methyl-phenol | 40 |
2-Chlorophenol | 50 |
2,4-Dichlorophenol | 20 |
2,4-D (ester) | 1 |
(non-ester) | 40 |
1,1,1-Trichloroethane | 100 |
1,1,2-Trichloroethane | 300 |
Bentazone | 500 |
Benzene | 30 |
Biphenyl | 25 |
Chloronitrotoluenes | 10 |
Demeton | 0.5 |
Dimethoate | 1 |
Linuron | 2 |
Mecoprop | 20 |
Naphthalene | 5 |
Toluene | 40 |
Triazaphos | 0.005 |
Xylene | 30 |