Table 1.
Surveys of PCB in building caulking and sealants
| Location | Buildings (number of samples) |
PCB concentration (ppm) in detectable samplesa |
% positive for PCB |
Ref |
|---|---|---|---|---|
| Boston MA | 24 Buildings constructed/ renovated in 1970s (24 samples) | 0.56–32,600 | 54% | Herrick 2004 |
| Switzer-Land | Buildings constructed 1950–1978 (1348 samples, number buildings not reported) | 20–550,000 | 48% (multiple samples per building) | Kohler 2005 |
| Toronto Canada | 95 Buildings total, 80 constructed 1945–1980 (95 samples) | 570–82,090 | 14% overall (27% not including residential) | Robson 2012 |
| San Francisco Bay Area, CA | 10 Buildings constructed/ renovated in 1970s (29 samples) | 1–220,000 | 88% (multiple samples per building) | Klosterhaus 2013 |
| Denmark | 27 schools (average 8–10 samples per building including sealant, adhesive, paint) | 0.1 ->5000 ppm | 78% >0.1 ppm 30%>50 ppm |
Haven Woods Hole Massachusetts 2014 citing Langeland (in Danish) |
a
in the cases of Kohler and Herrick, the PCB concentrations were calculated as the sum of congeners PCB-28, -52, -101, -138, -153, and -180 multiplied by a factor of 5; Haven/Langeland calculated total PCB as the sum of congeners PCB-28, -52, -101, -118, -138, -153 and -180 multipled by 5; total PCB reported by Klosterhaus was the sum of 40 congeners; Robson reported the sum of 83 congeners