Following the explosion of a transformer, passersby, building occupants, and cleanup personnel had potential exposure to the transformer dielectric fluid containing polychlorinated biphenyls (PCBs).

PCBs are a health risk because they build up in the environment, accumulating in the tissue of fish and other aquatic animals. In addition to causing cancer, PCBs can affect brain development and ...

Marketed as a wonder chemical when first introduced in the late 1950s, PCBs were widely used in electrical transformers, capacitors, caulking and light fixtures due to their stable, fire-resistant, ...