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Exposure Assessment

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(1)

Ideas for sound and robust Exposure Assessment

(2)

Description of workplace situation is complex:

Variability of workplace situations

Between-worker variability

Influence factors on (dermal) exposure

Difficulties

(3)

Tiered approach

Exposure Assessment

Workplace situation

Tier 2 Actual exposure

Tier 3 Field Studies

Information

(4)

Wood preservatives - automatic dipping

Choice of model: vacuum pressure process or manual dipping?

Which default values are reasonable?

Ideas:

Description of uncertainties

Harmonisation process on default values

Scenario uncertainties

(5)

Example mathematical models

Valid input variables

Validation studies for models

(overestimation/underestimation?)

Distributions instead of discrete exposure levels

Model uncertainties

(6)

Use of PPE...

... in compliance with label requirements/regulations?

Compliance

(7)

Use of PPE...

... in compliance with label requirements/regulations?

Compliance

Idea:

Experience exchange and harmonised concept

(8)

Exposure assessment is an approximation process (tiered approach)

Being aware of scenario uncertainties and describe them (transparency of decisions)

Validation of models and valid input parameters

Harmonisation process for exposure assessment (defaults, compliance) new TGD

Conclusions

(9)

Dr. Dagmar Holthenrich

Federal Institute for Occupational Safety and Health Friedrich-Henkel-Weg 1-25

44149 Dortmund Germany

Tel. +49 (0) 231/9071-2357 Fax +49 (0) 231/9071-2790

holthenrich.dagmar@baua.bund.de

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