A former casern site was supposed to be used differently. In order to generate the basics for assessment in the run up to takeover negotiations and plannings, an analysis of building pollutants as well as a detailed investigation of waste disposals have been required by the future occupant. The building complex, which basically consisted of service halls and garages, and secondarily of an office and accommodation buildings, has been investigated in the course of a systematic inspection. At this juncture, all devices have been land registered after evaluating, sampling and quantifying. By means of systematic analyses, analog groups have been pooled. On the basis of the results, qualification and quantification of the individual building materials could be defined and procedural and environmental concepts could be compiled as well as concepts concerning waste disposal. Those provide a basis for the cost-effective and reasonably planned, well-regulated deconstruction of the building complex.The intention of the soil investigation was a waste legislative valuation of the incidental excavation material which occurred in the course of the new building and also an environmental investigation of potential underground pollutions on the site. This includes operational pollutions due to the former utilization of the site as a casern and secondarily brought up, contaminated anthropogenic fillings. By the use of pile core drillings the underground has been detected and accordant sample aliquots have been verified analytically. The tendering documents have been compiled on the basis of the accomplished investigations. Furthermore, cost calculations, process engineering, construction course, waste disposal logistics, etc. have been already specified in the planning phase.