[PCB in sealants: experience and results of procedures in Berlin and decontamination of a school. II. Follow-up of PCB decontamination and evaluation of individual decontamination steps].

A general survey of the procedure of the restoration of a school building is presented. The effects of several measures (i.e. ventilation) and restoration steps as well of problems of removal of PCB containing materials and financial charges are discussed and evaluated. It was possible to reduce the indoor air contamination below the value of 300 ng/m3 by removal of the PCB-containing sealants and sealing the secondary contaminated walls with appropriate materials.