1. 1 COST Action 636 Xenobiotics in the Urban Water Cycle 5 th meeting of WG 3 „Impact Assessment“ Santiago de Compostela, September 10.-12. 2007

2. 2 COST Action 636, WG3 meeting, 10 th – 12 th September 2007 in Santiago de Compostela Action plan of WG 3 for 2008

3. 3 Main Topics of the WG 3 in 2008 WG 3 proposes to work in the following fields: Recommendation of the most suitable biotest (battery) Linking to the other WG’s Proposals of R&D Projects Use of biosensors for impact assessment

4. 4 “Best” biotest battery WG 3 “collected” 49 biotests which use different species and are used to assess different effects Additional informations were added about: Which tests have been previously applied successfully for screening toxicity in different water types?

5. 5 “Best” biotest battery To achieve the goal - recommendation of the “best” biotest battery – more informations are necessary: For which purpose the test has to be used? Total screening (water sources) Assessment of a group of substances (waste water treatment, water treatment, process combinations, single treatment steps,...) Assessment of a single substance (correlation between biotest and analytic results)

6. 6 Linking to the other WG’s Linking to the other WG’s may strength the potential of the COST Action 636, because the problems are linked and may be better (more efficiently) solved in a common work e. g. in common projects. Linking to WG 1: Assessment of different fluxes, sources Linking to WG 2: Assessment of the treatment efficiency of single process steps, process combinations, waste water treatment, water treatment

7. 7 Proposals of R&D projects Basic proposals were made in the slides before. Linking to WG 1: Assessment of different fluxes, sources Linking to WG 2: Assessment of the treatment efficiency of single process steps, process combinations, waste water treatment, water treatment May be WG 3 participants may act as subcontrators in the other WG’s

8. 8 Biosensors for impact assessment The use of so called biosensors (lab on chip) is an actual topic within the analytic fields. The basic idea is to combine an electronic chip with a detector. This detector may be a protein or a DNA or special surfaces, which react with the correspondant compound in a medium. The reaction may be converted into an electric signal New tool for impact assessment?

9. 9 Biosensors for impact assessment WG 3 proposes to make a research (www, literature) to have an overview on the state of the art. This may be the basis for the decision: Will we work on it or not?