PARENT SESSION

1J - Bioaccumulation
Poster Hall
8:30 AM - Wednesday, 30 April 2003
Chair: Tarazona, J.¹, ¹
Co-chair: Gobas, F.², ²

(WEP/62) Correlation of Water Solubility, Bioconcentration Factors, and Critical Body Residue Concentrations in Chemical Hazard Assessments.

Ransom, Randall¹, Drottar, Kurt¹, ¹ Dow Corning Corporation, Midland, MI, USA

ABSTRACT- Use of bioconcentration factors and log Kow values in environmental assessments and as criteria triggers in regulatory programs has been increasing in recent years. BCF criteria are utilized in U.S. EPA's PBT assessment of new chemicals under TSCA. Canada's evaluation of chemcials on the Domestic Substances List (DSL)includes both a BCF and log Kow criterion. The European Union has proposed BCF and log Kow criteria for PBT and VP/VB assessments, and UNEP inlcudes both BCF and log Kow as POP criteria. This presentation evaluates BCF and log Kow values in the broader context of bioavailability and potential adverse effects on aquatic organisms. This is accomplished by correlating log Kow and BCF values, water solubility limits, and critical body residue concentrations for a better assessment of potential for adverse environmental effects, particularly for hydrophobic chemicals.

Key words: solubility, bioconcentration, residue, criteria