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

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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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