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The Surface Waters (Dangerous Substances) (Classification) Regulations 1998

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Regulation 2

SCHEDULE 1CRITERIA FOR CLASSIFICATION DS6

1.  Subject to paragraph 2 below, the requirements for the classification DS6 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 mevinphos in each sample so taken does not exceed 0.02 microgrammes per litre.

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.

TABLE 1

(1)(2)
Dangerous SubstanceLimit (in microgrammes per litre) (annual mean)
4-Chloro-3-methyl-phenol40
2-Chlorophenol50
2,4-Dichlorophenol20
2,4-D (ester)1
(non-ester)40
1,1,1-Trichloroethane100
1,1,2-Trichloroethane400
Bentazone500
Benzene30
Biphenyl25
Chloronitrotoluenes10
Demeton0.5
Dimethoate1
Linuron2
Mecoprop20
Naphthalene10
Omethoate0.01
Toluene50
Triazaphos0.005
Xylene30

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