Keywords: pesticides metabolites Systems: groundwater Substances: 2-4-D (OVSKIKFHRZPJSS-UHFFFAOYSA-N) 1-Methyl-Benzotriazole (HXQHRUJXQJEGER-UHFFFAOYSA-N) 1-Hydroxy-Benzotriazole (ASOKPJOREAFHNY-UHFFFAOYSA-N)