Journal
ENVIRONMENT INTERNATIONAL
Volume 36, Issue 6, Pages 506-513Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.envint.2010.03.009
Keywords
PCBs; Sealants; Sources; Buildings; Toronto
Categories
Funding
- Great Lakes Atmospheric Deposition
- Natural Science and Engineering Research Council (NSERC)
- Ontario Ministry of Environment
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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. (C) 2010 Elsevier Ltd. All rights reserved.
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