Persistent Organic Pollutants: Not Finished Yet
2008
Old Wood Floors and PCB Exposure
Sample size: 4
publication
Evidence: moderate
Author Information
Author(s): Ruthann Rudel, David Carpenter
Primary Institution: Silent Spring Institute
Hypothesis
Are older wood floor finishes a significant source of PCB exposure?
Conclusion
Old wood floor finishes may release PCBs into the air and dust, contributing to elevated blood levels in occupants.
Supporting Evidence
- PCBs were found in about a third of the residences studied.
- Three occupants showed elevated blood levels of PCBs as high as 1,520 ng/g.
- The homeowner with the highest PCB levels had sanded his floors before the study.
Takeaway
Some old wood floors can release harmful chemicals called PCBs into the air, which can make people sick.
Methodology
The study involved measuring air and dust concentrations of PCBs in two homes and analyzing occupants' blood levels.
Limitations
The study is limited by the small number of participants and the lack of direct evidence linking sanding to increased PCB levels.
Participant Demographics
Occupants of two homes on Cape Cod, Massachusetts.
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