Human exposure to spray drift: investigations into modelling the spray exposure of residents and bystanders and its variability

摘要

The BREAM (Bystander and Resident Exposure Assessment Model) model for bystander and resident exposure to spray drift has recently been incorporated into the European Food Safety Authority (EFSA) guidance for determining non-dietary exposures of humans to plant protection products. The component of BREAM which relates airborne spray concentrations to bystander and resident dermal exposure has been reviewed to identify if it is possible to improve the description of the relationship between dermal exposure and airborne spray. A semi-mechanistic model has been developed based on established studies combined with new data obtained in a wind tunnel. The implications of this model for the regulatory values for the 75,h and 95th percentiles of the exposure distribution are explored.