[PCB caulking sealants--experiences and results of measures in Berlin and decontamination of a school (Part I)].

PCB contamination of indoor air in public buildings by elastic sealants has proved to be a serious problem in West Berlin. Besides a general survey and introduction into the toxicological problem the procedure and experiences in Berlin are presented. Besides a proposal of a catalogue of several preventive measures, sampling and analytical methods are also described. During the control of about 220 buildings, 40 turned out to be PCB-contaminated, mostly gymnastic halls (30). In former East Berlin no PCB contamination by elastic sealants is known so far. In part 2 experiences and results of a restoration of a school-building are reported.