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Environ Int. 2010 Aug;36(6):506-13. doi: 10.1016/j.envint.2010.03.009. Epub 2010 May 7.

Continuing sources of PCBs: the significance of building sealants.

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Department of Geography, University of Toronto, Toronto, Ontario, Canada.


To investigate the significance of building sealants as a remaining source of PCBs to the environment a combined measurement campaign and GIS-based stock estimation were undertaken for Toronto, Canada. This showed that 14% of buildings measured had detectable quantities of PCBs present in sealants, with concentrations from 0.57 mg/g to 82 mg/g (n=95). We then constructed a GIS-based database of remaining PCB-containing sealants in Toronto. This showed that there is an estimated 13 t still present in the city. Mass balance calculations showed that up to 9% had been lost via volatilization alone. This potentially has important implications for both human exposure and the continued presence of PCBs in the environment.

[Indexed for MEDLINE]

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