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(M/FF244) Herbicide residues in soil and ground water 10 years after cease of use. Sundin, Peter1, Wallman, Karin1, Ramberg, Åsa1, Kreuger, Jenny2, Kylin, Henrik1, 1 2 ABSTRACT- In the groundwater of Uppsala, Sweden, 2,6-dicholorobenzamide (BAM), a degradation product of the herbicide dichlobenil, can be detected at concentrations of up to two micrograms per liter "downstream" of the city center, despite no use after the ban in 1990. Soil analyses at sites where products containing dichlobenil had beeen used in the 1970s and 1980s revealed the presence in top soil (15 - 30 cm deep) of up to about 30 micrograms of dichlobenil and up to about 800 micrograms of BAM per kg of soil (dry weight). This suggests that the ground water contamination may be a result of leakage by infiltrating water of contaminants still present in the soil. Also atrazine residues were found in both soil and ground water, although at lower levels. Key words: dichlobenil, 2,6-dichlorobenzamide, atrazine |
