Cambridge Environmental recently evaluated whether polychlorinated biphenyls (PCBs) detected in floor boards, a concrete slab, and soil beneath a building would have harmed the health of workers’ engaged in demolition and renovation of the building.  We estimated the concentrations of PCBs likely to have been in air inhaled by workers sawing the PCB-contaminated floor boards.  We then evaluated the applicable toxicological literature and derived an acceptable level of PCB exposure that was more health protective than limits established by the Occupational Safety and Health Administration (OSHA) and the American Conference of Governmental Industrial Hygienists (ACGIH).  We documented our findings in a letter report to our client.

A redacted version of Cambridge Environmental’s letter report is available here.