PCB Contamination In Indoor Buildings
Author(s)
S. J. Hellman, O. Lindroos, T. Palukka, E. Priha, T. Rantio
& T. Tuhkanen
Abstract
PCBs can still be found in open applications such as additives in paints or elastic
sealants used in buildings built in the 1960s and 1970s. The objectives of this
study were to analyze the occurrence of PCBs in paints used in buildings. PCBs
were applied especially in chlorinated rubber paints, cyclorubber paints and in
vinyl paints, which have been used widely, especially in industrial buildings. The
results from the research show that 60% of buildings studied contain PCB over
20 mg/kg in indoor paints. From all the samples collected almost every fourth
contained PCBs over the limit value of 50 mg/kg given for hazardous waste. The
highest concentration (102 900 mg/kg) was found in the concrete floor of a
school building’s basement. Wipe samples taken from paint surfaces also
contained high amounts of PCBs. The highest amount (83 000 µg PCB/m2) was
found in the surface of a building, which had not yet been renovated. The most
common method for removing existing paint is sandblasting. After sandblasting
the sand contains high concentrations of PCBs and has a large surface area thus
PCBs leaching capacity may be significant. This may cause occupational and
also residential exposure to PCBs. In buildings that had been renovated by using
sandblasting for paint removal, PCBs were found in the surface, which had not
originally contained PCBs. The secondary contamination was often over the
Finnish limit value of 100 µg PCB/m2 as the highest concentration detected was
1100 µg PCB/m2. The congener profiles from the samples reminded the profile
of Aroclor 1260 or Clophen 60 profiles in almost all samples. The profiles
showed that the PCBs most probably originate from paints and not from other
PCB source such as capacitors.
Keywords: polychlorinated biphenyls (PCB), paint, indoor dust.
Keywords
polychlorinated biphenyls (PCB), paint, indoor dust.
Related Book
Other papers in this volume
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