194 
all sediment samples from the German Bight, it was found at some stations in the 
western Baltic Sea. 
Endosulfan I was determined at concentrations between <10 and 200 ng/kg dw with a 
median of 20.5 ng/kg. As about 60 % of the determinations were < LOD, the data can 
only be interpreted to a limited extent. 
The spatial distribution in the German Bight and western Baltic Sea is shown in Figure 
42. In the German Bight, Endosulfan I was only detected at stations having higher silt 
levels and TOC values above 3 mg/g. Surprisingly, even at station KS 11 which usually 
has the highest contamination levels, the measured values were 21 ng/kg dw or less. The 
limited data set does not allow a statistically relevant interpretation of the geographical 
distribution with respect to spatial gradients or input structures. 
4 5 6 7 8 9 10 11 12 13 14 15 
Figure 42: Endosulfan I concentrations [ng/kg dw] in surface sediments (0-2 cm) 
In the western Baltic Sea, concentrations were higher than in the German Bight, and 
there were more locations with positive findings. Whether this is due to the generally 
higher TOC values in the Baltic or to local/regional input sources cannot be ascertained 
on the basis of the limited data available. However, it is remarkable that in the vicinity 
of stations having elevated endosulfan concentrations in water (4.3.1), endosulfan levels