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Methodology for assessing environmental risks to surface waters, soils and ground water

1 Introduction
2 Methodology
2.1 Source characterisation
2.2 Recipient, receptor and criteria identification
2.3 Hazard and problem identification
2.4 Hazard assessment
2.5 Expert judgement
3 Discussion and conclusions
4 List of references
5 Appendices
5.1 Eriksson et al., 2005 (Water Science and Technology)
5.2 CHIAT executable PowerPoint

The methodology developed within this study was found to be very promising. It can be used generally for identifying selected priority pollutants (SSPP lists) for evaluation of different strategies for handling of storm- and wastewater and for selection of priority pollutants to be included in monitoring programmes. This procedure for selecting pollutants is transparent and adaptive to the specific scenario in focus.

The study also showed that the number of XOCs that could be expected to be present in stormwater is large (656 XOCs). However, it also illustrated that the XOCs that have been identified and quantified in stormwater is probably only a fraction of those compounds that are present; 366 have been observed by measurements and 411 have been identified as potentially present, with an overlap of only 121 XOCs. The hazard and problem identification carried out as a filtering further reduced the number of relevant XOCs to 121, i.e. this is the potential priority pollutants. This part of the study was hampered by the lack of inherent data for some of the potential pollutants. The hazard assessment further reduced the number of relevant XOCs to 40. However, this step is very preliminary, due to lack of data and procedures for exposure and effect assessment.

Finally, 16 XOCs were selected during the expert judgement. These have all inherent properties that makes them potentially hazardous. Furthermore, some of them have been observed in the environment in concentrations that could be critical for aquatic and soil living organisms.

Chemical risk assessment methodology, hazard identification, hazard assessment, xenobiotic organic compounds.

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Technical University of Denmark
Bygningstorvet, Building 115
DK-2800 Kg Lyngby