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Table 1 Example with toxicity and exposure values for hypothetical substances and scenarios based on worst-case RQmix

From: An efficient and pragmatic approach for regulatory aquatic mixture risk assessment of pesticides

  Substance A Substance B Mixture riska
EC50 [mg a.s./L] 1.1 82
RAC [mg a.s./L] 0.011 0.82
Scenario PEC [mg a.s./L] RQ PEC [mg a.s./L] RQ RQmix AF*ETRmix,CA
1 0.001 0.091 0.317 0.387 0.477 0.477
2 0.002 0.182 0.291 0.355 0.537 0.537
3 0.007 0.636 0.211 0.257 0.894 0.894
4 0.006 0.545 0.256 0.312 0.858 0.858
5b 0.008 0.727 0.195 0.238 0.965 0.965
  1. a The calculated RQmix is identical to the CA-based ETRmix,CA multiplied by the assessment factor (AF = 100)
  2. b Selected worst-case scenario