21-01 - Risk Assessment of Mixtures: Probabilistic Risk Assessment Approaches and Microcosm Validation.
Solomon, Keith^*,1, Chappel, Mark², George, Tara³, Sibley, Paul¹, Liber, Karsten³, ¹ Centre for Toxicology, Guelph, ON, Canada² Ontario Ministry of the Environment, Toronto, ON, Canada³ Centre for Toxicology, Saskatoon, SK, Canada

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21-02 - A Progress Report for Aquatic Exposure Assessment in the U.S. EPA Office of Pesticide Programs.
Lin, Jim^*,1, ¹ US EPA, Office of Pesticide Programs, EFED (7507C), Washington, DC

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21-03 - Fuzzy set uncertainty analysis of multimedia exposure assessment .
Matthies, Michael^*,1, Brune, Markus², ¹ Institute of Environmental Systems Research, Osnabrueck, Germany² IBM Global Services, Boeblingen, Germany

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21-04 - Sensitivity and uncertainty analysis of surface-water transfer models for environmental risk and impact assessment.
Duchesne, Sophie^*,1, Boyer, Patrick¹, ¹ Nuclear Protection and Safety Institute (IPSN), St-Paul-Lez-Durance, FRANCE

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21-05 - Probabilistic approaches and pesticide exposure: a long way from home?
Dubus, Igor^*,1, Brown, Colin¹, Beulke, Sabine¹, ¹ Cranfield Centre for EcoChemistry, Silsoe, Beds

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21-06 - Risk to Breeding Success of Ardeids in Hong Kong due to Persistent Organic Contaminants in Eggs .
Connell, Des^*,1,3, Lam, Paul¹, Minh, T², Tanabe, S², Wong, Bryan¹, Lam, Michael¹, Wong, L¹, Wu, Rudolf¹, Richardson, Bruce¹, ¹ Centre for Coastal Pollution and Conservation, Department of Biology and Chemistry, City University of Hong Kong, Hong Kong, Peoples Republic of China³ School of Public Health, Griffith University, Meadowbrook, Qld., Australia² Centre for Marine Environmental Studies, Ehime University, Tarume 3-5-7 Matsuyama 790-8566, Japan

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21-07 - Uncertainty in the determination of ecological no-effect concentrations.
Roelofs, J.J.W.^*,1,2, Huijbregts, M.A.J.², Jager, T.¹, ¹ National Institute of Public Health and the Environment (RIVM), Bilthoven, The² Nijmegen University, Nijmegen, The

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21-08 - Spatially explicit risk assessment .
Waldhardt, Rainer^*,1, ¹ Division of Landscape Ecology and Landscape Planning, Giessen, Germany

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21-09 - Accounting for inter-laboratory variations in environmental standard setting using weighted hierarchical bootstrapping.
Verdonck, Frederik^*,1, Thas, Olivier¹, Vanrolleghem, Peter¹, ¹ Ghent University, Coupure Links 653, Ghent, Belgium

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21-11 - SETAC Pellston workshop on the application of uncertainty analysis to the ecological risks of pesticides.
Hart, Andy^*,1, ¹ Central Science Laboratory, York, United Kingdom

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21-12 - Probabilistic modelling of risks to avian and mammalian predators and scavengers from rodenticide residues in their prey.
Hart, Andy^*,1, Shore, R.², MacDonald, R.³, Cowan, D.¹, Harris, S.³, MacNicoll, A.¹, Garthwaite, D.¹, ¹ CSL, York, United Kingdom² CEH, Monk Woods, United Kingdom³ University of Bristol, Bristol, United Kingdom

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21-13 - European workshop on Probabilistic Risk Assessment for pesticides (EUPRA).
Hart, Andy^*,1, ¹ Central Science Laboratory, York, United Kingdom

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21-14 - An aquatic environmental modelling system for regional and local scale exposure and water quality assessments.
Pope, Linda^*,1, Keller, Virginie², Young, Andrew², Fox, Kay³, ¹ Environment Agency, Reading, Berkshire, United Kingdom² Centre For Ecology and Hydrology - Wallingford, Wallingford, Oxfordshire³ Unilever Research, Bebington, Wirral, United Kingdom

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21-15 - Uncertainty and global sensitivity analyses for risk based remediation of contaminated sites.
Carlon, Claudio^*,2, Nadal, Nadia², Critto, Andrea¹, Marcomini, Antonio¹, ² Consorzio Venezia Ricerche, Via della Libertà 5/12, Venice, Italy¹ University of Venice, Department of Environmental Sciences, Calle Larga S. Marta 2137, Venice, Italy

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21-16 - Multi criterion ranking of potential environmental impact in GIS.
Sørensen, Peter^*,1, Lerche, Dorte¹, Fauser, Patrik¹, Thomsen, Marianne¹, ¹ National Environmental Resarch Institute, Fredriksborgsvej 399, PostBox 358, Roskilde, Denmark

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21-17 - Validition of the prediction of steady state concentration ratios with the multimedia fate model SimpleBox .
Struijs, Jaap^*,1, Peijnenburg, Willie¹, ¹ RIVM Laboratory of Ecotoxicology, Bilthoven, Netherlands

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21-18 - Spatial prioritisation of the environmental impact from pesticides on surface water ecosystems using GIS.
Sørensen, Peter^*,1, Gyldenkærne, Steen¹, Iversen, Hans¹, Elmegaard, Niels¹, Mogensen, Betty¹, Hansen, Henning¹, Schou, Jesper¹, ¹ National Environmental Resarch Institute, Fredriksborgsvej 399, PostBox 358, Roskilde, Denmark

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21-19 - Uncertainty analysis in geo-referenced probabilistic ecological risk assessment (PERA).
Verdonck, Frederik^*,1, Jaworska, Joanna², Janssen, Colin³, Vanrolleghem, Peter¹, ¹ Ghent University, Coupure Links 653, Gent, Belgium² Procter & Gamble, Temselaan 100, Strombeek-Bever, Belgium³ Ghent University, Jozef Plateaustraat 22, Gent, Belgium

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21-20 - Prediction of mixture toxicities: How to deal with Uncertainty ?
Scholze, Martin^*,1, Backhaus, Thomas¹, Faust, Michael¹, Junghans, Marion¹, Meyer, Wiebke¹, Grimme, LH¹, ¹ Dept. of Biology and Chemistry, University of Bremen, Bremen, Germany

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21-22 - Mercury contamination of freshwater systems in French Guiana: a statistical approach of risk assessment.
DURRIEU, Gilles^*,1, CHAOUKI, Fikria², BOUDOU, Alain¹, ¹ LEESA, University Bordeaux 1/CNRS, ARCACHON, FRANCE² MAB, University Bordeaux 1/Thales Avionics, TALENCE, FRANCE

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21-23 - Estimating acute toxicity to endangered fishes and other aquatic species.
Mayer, Foster^*,1, Ellersieck, Mark², Asfaw, Amwa², ¹ U.S. Environmental Protection Agency, Gulf Breeze, FL² University of Missouri-Columbia, Columbia, MO

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21-24 - Fuzzy logic and environmental risk assessment.
Ghomshei, Mory^*,1, Meech, John¹, Keen, Particia, ¹ University of British Columbia, Centre for Environmental Research in Metals, Minerals and Materials (CERM3). UBC/MMPE, 6350 Stor, Vancouver, BC, Canada

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21-25 - Using probabilistic risk analysis for determining the uncertainty of Flemish soil clean-up values.
Provoost, Jeroen^*,1, Seuntjens, Piet¹, Cornelis, Christa¹, Nouwen, Johan¹, ¹ Vito, Boeretang 200, , Mol,

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21-26 - Linking Chemical Mixture Models with Ecologically Predictive Models — a Large Scale Investigation.
Dyer, Scott^*,1, Posthuma, Leo², De Zwart, Dick², Hawkins, Charles³, ¹ The Procter & Gamble Company, Cincinnati, Ohio, USA² RIVM, Bilthoven, The Netherlands³ Utah State University, Logan, Utah, USA

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21-27 - Statistical and ecological evaluation of data sets for water quality criteria.
Traas, Theo^*,1, Mulder, Christian¹, van Wijnen, Harm¹, Aldenberg, Tom¹, ¹ RIVM PO Box 1 tp.traas@rivm.nl, Bilthoven, NL

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21-28 - Combined ecological risk of pesticide use in the netherlands.
de Zwart, Dick^*,1, Vonk, Marijke¹, van de Meent, Dik¹, ¹ RIVM, Bilthoven, The Netherlands

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