The city of Ribnitz-Damgarten has acquired the former Pütnitz airfield from the Federal Institute for Real Estate and intends to develop the area for tourist use. Due to the historical use of the site, both the soil and the groundwater are contaminated with mineral oil hydrocarbons, PAHs and BTEX, among others. Based on previous research campaigns, a total of 41 problem areas were identified. Furthermore, there are extensive sealed surfaces on the former airfield site as well as buildings that were erected as part of the military use of the site.

In the course of the soil, groundwater and building substance investigation put out to tender here, the 41 problem areas are to be examined in more detail on the one hand and a preliminary waste law characterization is to be carried out on the other hand for the sealed surfaces and buildings.

The building stock includes buildings that have been erected in the course of the military use of the area. In particular, the former residential and administrative buildings as well as the former aircraft hangars were built at the beginning of the period of use at the end of the 1930s. In the period after 1945, these were supplemented by individual smaller buildings, especially for storage purposes. Roughly speaking, the following types of buildings can be distinguished with regard to their construction method and their former use:

• Accommodation and administration buildings of the 1930s in brick construction ("Red City"), currently vacant • Further accommodation and administration buildings partly of later construction phases in brick / masonry construction, partly plastered outside, mostly currently vacant • Former aircraft hangars from the 1930s, partly used as storage / workshop halls and technology museum • Other functional buildings (warehouses, workshops, special uses, etc.), mostly currently vacant It is planned to examine a total of 5 individual buildings exemplarily with regard to the pollutant inventory in the building fabric. Due to the ongoing coordination process, the buildings intended for this purpose are not yet known in detail. They are expected to be designated only after the order has been placed, but in any case before the sampling work has been carried out. It must be assumed that at least one building of each of the above categories must be examined. As part of the investigations, material samples are to be obtained from components suspected of harmful substances and examined for the suspicious parameters (asbestos, PAH, PCBs, heavy metals, wood preservatives, possibly others if suspected). These components are addressed by the sampling personnel during the on-site inspections. The personnel used for this purpose must be competent, at least one person from the team must have a certificate of competence for work on products containing asbestos according to TRGS 519. Examples of materials to be assessed as part of the building substance investigations include fibre cement products, roofing membranes, insulation materials, joint fillers, construction timber, paints, varnishes and coatings as well as plasters and tile adhesives. For the investigation of the mineral building fabric, about 2 to 3 drill cores are to be taken per examined building, of which at least one from the outer wall and one from the base plate or a floor ceiling. The analysis is carried out according to LAGA M 20, Tab. II.1.4-1 (Minimum testing programme for construction rubble prior to treatment in case of non-specific suspicion). The sampling must be documented by means of a sampling protocol and photographically. Since there are no floor plans of the buildings, the sampling point must be described textually in the protocol in such a way that it can be clearly assigned spatially. The buildings expected to be inspected are currently unused and locked to protect against vandalism. In coordination with the contractor, the client shall open the building entrances shortly before the start of the sampling work in order to ensure unhindered access to the buildings to be examined. The opening of the hangar includes accessibility of the hall space for motor vehicles (e.g. lifting platforms). All other buildings can be reached by vehicles in the vicinity, but inside they are only accessible on foot. It can be assumed that there is no supply of electricity and water within or in the vicinity of the buildings to be examined. Corresponding consumables and equipment for the safe execution of the sampling work must therefore be procured and operated by the contractor itself.