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Summary Slide Some Industry views on POP/PBT identification in Europe.

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Presentation on theme: "Summary Slide Some Industry views on POP/PBT identification in Europe."— Presentation transcript:

1 Summary Slide Some Industry views on POP/PBT identification in Europe

2 Dr Dolf van Wijk – Euro Chlor Manager Environmental Sciences Some Industry views on POP/PBT identification in Europe

3 Contents: The industry perspective Learnings from Europe – PBT exercise: - Identification of T - Identification of B – proposal - Identification of P - proposal

4 POP identification Different criteria in different legislations Different interpretations of data versus criteria Oversimplification in regulations: e.g. not ready = persistent; Hazard based, how to include risk?

5 Identification as Toxic In Europe usually not very controversial: Test validity well described and agreed (Klimisch criteria) Multiple data interpretation clear: - lowest value used - penalising data-rich substances Criteria (LC 50, NOEC) are test endpoints

6 Identification as Bioaccumulative Tests less standardised, less experience, more costly Proposal: evaluate according to OECD and define validity criteria (equilibrium- recovery, etc.) Multiple data interpretation, e.g.: - 10 values; 2 are 5500; 8 are below? - Weight of fish, bacteria, algae, etc.? Proposal: weight of evidence Criteria are test endpoints: BCF is measured (but often only surrogate logK ow is available)

7 Identification as Persistent For water: no tests exist: use (bio)degradation tests and other evidence + careful interpretation Multiple tests: like in C&L positive test usually taken Criteria are (mostly) not test endpoints; extrapolation to the environment extremely difficult

8 Persistency half-lives Half-lives for persistency are the result of many complex interactions and conditions: ‘A common finding is that biogeochemical processes in the receiving environment are as crucial to the manifestation of persistence as are the chemical properties themselves’ Pellston workshop on POPs (Setac, 1999)

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10 Substance Passes ready biodegradation test (OECD 301) Any other data Yes CAS, soil, marine (OECD 303; OECD 304; OCED 306) Inherent (OECD 302; OECD 301-equivalent with adapted sludge) Other evidence (non-standard; pure cultures; etc.) Accept categorisation: stop or refine: further data No Yes No Abiotic degradation (OECD 111; OECD Mongraph 7; OPPTS equivalents) 1 P2 P2 P1 P2 P1 P4 P1 YesNoRate and extent?NoYes 2 P2 1 Classified as P2 due to the presence of metabolites or bound residues 2 Achieved 70% degradation outside the guidance outlined in the TGD (Section ) YesNo P4P3

11 Substance Passes ready biodegradation test 1 Any other data 2 Distribution model – Level II or III 6 No Yes CAS, soil 4 or marine Inherent 5 Other evidence P4 Accept categorisation: stop or refine: further data Identify compartment(s) of interest No Aquatic/ Marine 7,8 Water/ Sediment 7 Soil 7 Air Evidence of biodegradation: biotic and/or abiotic degradation Yes No Abiotic degradation 3 P2 P1 P2 P1 P2 P1 P2 P1 Default P4P3 Screening Stage Confirmatory Stage P3 No concern P2 P1


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