In the course of the construction of a large-dimensioned excavation pit, soils that showed contaminations with PAH and heavy metals have been detected in the range of the anthropogenic fillings. In the progressive construction measures a capacious soil management was required that was mainly based on the logistic storage and disposal of the contaminated, excavated materials. In one part of the realty a serious creosote damage has been detected up to the water saturated zone, which demonstrably had impaired the first aquifer. Having accomplished further surveys, the accordant area has been remediated via soil exchange by use of large-scale drillings after coming to an agreement with the responsible technical authorities. After balancing the cost-benefit ratio and for civil engineering reasons this procedure explains why no other remediation methods could have been applied. Altogether 264 exchange drillings have been sunk to an average depth of 5m by use of a drilling apparatus of the type BG9. In so doing, the damage on an area of approximately 178 m² has been eliminated as far as possible. By backfilling the drilling holes with concrete the area could have been overbuild with no further measures in order to generate new able building ground. For precaution matters a long-term groundwater monitoring has been realized after finishing the remediation phase.