Investigations to Risk Assesment Due to Arsenic and Aluminum Contamination of the Subsoil in Ground-Water Veins

On the site of a former leather-processing factory, a hospital was erected late in the Eighties. In the course of excavations for peripheral facilities, an old waste deposit had to be removed. At ground-water exchange depth and below the ground-water table, black gravel was laid bare. Subsequent investigations revealed that the gravel layer extended beneath the hospital, as well. In the black gravel, contamination is present in the form of arsenic and aluminum, resulting from arsenic lime and effluents form leather production.