Aarhus University Seal / Aarhus Universitets segl

No. 301: Nord Stream 2 CWA marine risk screening

Sanderson, H. & Fauser, P. 2019. Nord Stream 2 CWA marine risk screening. Aarhus University, DCE – Danish Centre for Environment and Energy, 11 pp. Scientific Report from DCE – Danish Centre for Environment and Energy No. 301. http://dce2.au.dk/pub/SR301.pdf


The aim of this report is to assess the risk to the marine environment of detected chemical warfare agent (CWA) residues and the added risk associated to the resuspension of sediment particles from construction intervention works of the Nord Stream 2 gas pipeline in the Baltic Sea. Based on chemical analysis of sediment samples and subsequent risk modelling it is found that the added risk represents less than 1 % of the background risk. As the overall background risk is low, it is concluded that the added marine environmental risk of the detected CWA residues, from intervention works, is negligible.