An Unrecognized Source of PCB Contamination in Schools and Other Buildings.

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Reports on an investigation of 24 buildings in the Boston area revealing that one-third (8 of 24) contained caulking materials with polychlorinated biphenyl (PCB) content exceeding 50 ppm by weight, which is the U.S. Environmental Protection Agency (U.S. EPA) specified limit above which this material is considered to be PCB bulk product waste. These buildings included schools and other public buildings. In a university building where similar levels of PCB were found in caulking material, PCB levels in indoor air ranged from 111 to 393 ng/m3; and in dust taken from the building ventilation system, < 1 ppm to 81 ppm.
Herrick, Robert; McClean, Michael; Meeker, John; Baxter, Lisa; Weymouth, George
Environmental Health Perspectives
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