A risk assessment typically comprises the following four elements:
- Hazard identification
- Toxicity assessment
- Exposure assessment
- Risk characterisation.
In general, three types of risks will be evaluated. These are
- Risk to human health. An in-depth analysis is needed for all possible sources, exposure pathways and acceptors (humans) via highly standardised procedures.
- Ecological risks. These will be reviewed in depth for valuable ecological sites such as protected nature reserves, or more generally for industrial and residential sites.
- The risk of spreading or migration. An assessment is made to estimate the probability of contamination increasing in the future and the probability that humans or ecological sites will be put at risk.
Soil remediation standards, as reflected in Flemish, Brussels and Walloon legislation, are based on risk assessment, but in a general way using standard and protective assumptions. These are designed for widespread use, covering a broad range of potential site conditions. Consequently, they have to be more conservative than values that have been based on site-specific conditions, as the first ones have to take into account the most stringent conditions possible on a site.
Experienced RSK project managers guarantee an accurate and precise derivation of risk values to ensure the correct decisions are made for your project.
For more complex projects, we can call on our risk assessment specialists. These specialists have an in-depth theoretical and practical knowledge of both qualitative and quantitative risk assessments, design of conceptual site models, implementation of risk models, soil seepage processes, contaminant transformation, contaminant transport characteristics and interpretation of results.