The soils contain 0,3 - 2 µg HCB / kg soil, see ->pdf
in a unique hugh area of a 30-80 km radius.
Is this a high and big area contamination?
In several milk and animal food HCB was already found.
The HCB is caused by a 2 year long, low temperature burning at 400°C with 8 mikrogramm HCB per cubic meter air of HCB-conataminated limestone from a landfill (Deponiekalk) from a ancient HCB.factory.
http://kaernten.orf.at/news/stories/2683507/