PARENT SESSION

1L - Exposure Modelling
Poster Hall
8:30 AM - Wednesday, 30 April 2003
Chair: Lammel, G.¹, ¹
Co-chair: Dachs, J.², ²

(WEP/80) A comparison of approaches to modelling in environmental and consumer risk assessment for pesticides and biocides.

Howard, Karen¹, Harris, Caroline¹, Jarvis, Tim¹, ¹ Exponent International Ltd, Harrogate, North Yorkshire, UK

ABSTRACT- This paper explores different approaches to deterministic and probabilistic modelling of environmental and consumer exposure and risk assessment for biocides and pesticides. The subsequent role of such risk assessment in regulatory decision-making is discussed. The differences in methodology for pesticides and biocides, of estimating exposure of wildlife to in soil and surface water and exposure of humans from dietary and non-dietary sources, are highlighted. The merits and drawbacks of the approaches of deterministic and probabilistic modelling are presented in the regulatory context of assessing risk to consumers and the environment under the Plant Protection Products Directive (91/414/EC) and the Biocides Products Directive (98/8/EC).

Key words: modelling, exposure, pesticides, biocides