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Environmental Sciences Europe
Fig. 4 | Environmental Sciences Europe

Fig. 4

From: A critical examination of the protection level for primary producers in the first tier of the aquatic risk assessment for plant protection products

Fig. 4

Comparison of regulatory acceptable concentrations (RACs) at different tiers, represented as first tier RACs (Tier-1 RACs) versus higher tier RACs (Tier-3 RACs). A Tier-1 RACs based on the growth rate inhibition endpoint (ErC50) for each active substance (a.s.) and the default AF of 10 (current approach); B Tier-1 RACs based on the lowest endpoint for each a.s. and the default AF of 10 (previous approach). Please note that the lowest endpoints correspond always to the area under the curve or yield (Eb/yC50) since the values were below the ErC50 values; C Tier-1 RACs based on the growth rate inhibition endpoint (ErC10) for each active substance (a.s.) and the default AF of 10

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