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Summary Slide. Some Industry views on POP/PBT identification in Europe. Some Industry views on POP/PBT identification in Europe. Dr Dolf van Wijk – Euro Chlor Manager Environmental Sciences. Contents:. The industry perspective

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Summary slide
Summary Slide

  • Some Industry views on POP/PBT identification in Europe


Some industry views on pop pbt identification in europe

Some Industry views on POP/PBT identification in Europe

Dr Dolf van Wijk – Euro Chlor

Manager Environmental Sciences


Contents
Contents:

  • The industry perspective

  • Learnings from Europe – PBT exercise:- Identification of T- Identification of B – proposal- Identification of P - proposal


Pop identification
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?


Identification as toxic
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 (LC50, NOEC) are test endpoints


Identification as bioaccumulative
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 logKow is available)


Identification as persistent
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


Persistency half lives
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)


P2

P2

P1

P1

P1

P1

P1

P3

P4

P4

P3

P3

1P2

Substance

Yes

Passes ready biodegradation test (OECD 301)

No

No

Any other data

Yes

Inherent

(OECD 302; OECD 301-equivalent with adapted sludge)

Abiotic degradation

(OECD 111; OECD Mongraph 7; OPPTS equivalents)

CAS, soil, marine

(OECD 303;

OECD 304; OCED 306)

Other evidence

(non-standard;

pure cultures; etc.)

Rate and extent?

Yes

No

Yes

No

Yes

No

2P2

Accept categorisation: stop

or refine: further data

1Classified as P2 due to the presence of metabolites or bound residues

2Achieved 70% degradation outside the guidance outlined in the TGD (Section 2.3.6.4)


Substance

P3

P3

P3

P3

P3

P4

P4

P2

P2

P2

P2

P2

P1

P1

P1

P1

P1

P1

Screening Stage

Yes

Passes ready biodegradation test1

No concern

No

No

Any other data2

Yes

Abiotic degradation3

Inherent5

Other evidence

CAS, soil4 or marine

Accept categorisation: stop

or refine: further data

Default

No concern

Confirmatory Stage

Distribution model – Level II or III6

Identify compartment(s) of interest

Aquatic/

Marine 7,8

Water/

Sediment7

Soil7

Air

Evidence of biodegradation: biotic and/or abiotic degradation

P1

No

Yes

P2


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