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COMPTE-RENDU DU COLLOQUE

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W<br />

J L<br />

MEASURING RISK /129<br />

Extrapolation<br />

D C B<br />

(Natural<br />

background) Exposure<br />

Figure 2-9. Generalized exposure-effect curve, showing extrapola-<br />

î<br />

Ul<br />

tion to low levels.<br />

Exposure —<br />

Threshold<br />

Figure 2-10. Generalized exposure-effect curve, showing threshold<br />

effect.<br />

0 C B oose<br />

FIGURE 9<br />

Fie. I. Genoa! aittstniioa of a proœs foe the calculation of an ADl for a particular substance.<br />

FIGURE .10

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