1,3-D principal degradation product seems to be 3-chloroacrylic acid (max. 37.3 % TAR) that eventually is degraded into NER (max. 24.6% TAR) and CO2 (max. 37.6%) under aerobic conditions. The major degradation products identified were 3-chloroallyl alcohol (13.5% TAR) and NER (44.8% TAR) under sterile aerobic conditions. Additionally, an average of 24°C 9.4 % TAR was volatilised during incubation time and some radioactivity was not identified (up to 23% in the parent degradation study and 24.6% at 3-chloroallyl alcohol one). Then clarification in this point is needed (Data gap). According to these results, 1,3-D is expected to dissipate from treated soil via volatilisation (max. 42.8% TAR) and metabolised by abiotic via to 3-chloroallyl alcohol that quickly is metabolised to 3-chloroacrylic acid and other minor metabolites that can be eventually mineralised and incorporated as bounded residues. However, mineralisation results should be carefully taken into account since no control was carried out to confirm whether or not 3-chloroacrylic acid contributed to 14C-precipitation during the extraction procedure. Finally, an oxidation was observed under anaerobic conditions (initial and final oxygen content in aqueous phase were: 4 ppm and 1ppm), being again 3-chloroacrylic acid (max. 55% TAR) the principal oxidation product, so new information of 1,3-D degradation under anaerobic conditions is not available. Soil photolysis data has not been submitted because 1,3-D does not absorb visible light, and given the mode of application (injected and drip) soil photolysis is not expected to be of significance.