A critical evaluation of environmental fate of parent compounds, relevant metabolites and co-formulants is conducted for all compartments including surveys of metabolic pathways and model calculations for distribution patterns and biodegradation rates.
Standard PEC calculations were performed for soil, groundwater, surface water / sediment and air followed by higher tier exposure assessments where required:
PEC calculations and assessments of the accumulation potential in soil
Use of ground and surface water models provided by the FOCUS group including modifications to country specific requirements (e.g. implementation of specific weather data)
Use of country specific exposure models (e.g. Exposit, Eva; PSD drainage scenarios)
Implementation of lysimeter data in the groundwater exposure assessment and refinement of input parameter (e.g. aging of KOC values, re-evaluation of degradation rates)
Implementation of risk mitigation measures (e.g. buffer zones, drift reduction)
Probabilistic and GIS-based approaches for exposure predictions in close cooperation with the applicant and / or the competent authority
Estimates for the short and long-range transport potential of volatiles substances via air
Supportive model calculations:
Assessment / calculation of degradation and dissipation rates from laboratory and field trials according to guidance of the FOCUS work group on Degradation Kinetics
Normalisation / standardisation of environmental fate data and decision making on the required endpoint values as input parameters for model calculations
Assessment of the relevance of metabolites in groundwater in consideration of predicted residue levels, biological activity, toxicological and ecotoxicological properties
