Annual Implementing bioavailability meeting Introduction of meeting aims and outline of outputs from previous meetings. Brief round table introductions The Tiered approach – what is it? where did it come from and how does it work? Graham Merrington Tier 2 and user-friendly tools – accounting for bioavailability with poor data: options and opportunities – Frank Van Assche and Chris Cooper Using biotic ligand models, a task for normal humans, or advanced brain surgery? A practical guide. Adam Peters The ZnBLM – new and improved. Frederik Verdonck Forward look, what is happening now or about to happen in regard to metal bioavailability around the globe? (ALL welcome – 2-3 slides each, national initiatives, etc.) AoB?
Intros? Who you are Organisation Why are you interested in implementing bioavailability?
The Tiered approach – what is it The Tiered approach – what is it? where did it come from and how does it work? Graham Merrington SETAC 2017
What is the tiered approach? An approach to accounting for bioavailability, but having just one EQS (set for RWC conditions) Consistent with classic risk assessment paradigms -early tiers precautionary, but simple to perform with large numbers of sites (as information requirements are low) Screen out, not screens in. As progress is made through the assessment tiers the data and calculation requirements increase, but for sites / waterbodies where potential risk SETAC 2017
Where did it come from? The Environment Agency had a Standards setting programme… The WFD was in early phases It was clear that that there was trouble ahead with face value comparison! Only one EQS Pass Fail (significant) 70.5% Fail (face value) 83.9% Number of sites = 224 2/5/2006 SETAC 2017
A possible tiered approach? SETAC 2017
Summary Trialled and tested Relatively straight-forward to use…….1&2 can be undertaken together. Tier 3 can include many options, as considered by MS……….many MS won’t have the most ideal dataset before they start! Practical and resource friendly SETAC 2017