regulation 3(7)
SCHEDULE 7Criteria for Classification DS7
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.
TABLE 9
| (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 |