1. Determine the level of risk
This step is based on the results of the previous steps. It compares the toxicological reference values selected with the exposure doses quantified.
Health risk characterization involves calculating, for each substance, the risk index (RI) or hazard quotient (HQ) for threshold toxic effects, and the excess individual risk (EIR) for non-threshold toxic effects.
This stage involves selecting the level of risk and quantifying the risk to human health. It is established for humans.
This is the level of risk defined as acceptable, against which the assessed risk level of the site can be compared.
For human health, we define two types of risk: non-threshold risks (e.g. carcinogenic risk) and threshold risks.
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Determine the level of risk
Risk calculation
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Regulatory reference
Directive n° 93/67/CEE du 20 juillet 1993 establishing the principles for human risk assessment and the development of new substances
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