Environmental

In New York, the presence of PCBs (polychlorinated biphenyls) in a building would most likely be found in:

AWindow frames installed after 1978
BFluorescent light ballasts and certain electrical transformers installed before 1979✓ Correct
CThe building's plumbing pipes
DVinyl floor tiles installed after 1990

Explanation

PCBs were commonly used in electrical equipment, including fluorescent light ballasts and transformers manufactured before their use was banned under the Toxic Substances Control Act (TSCA) in 1979. Buildings constructed or renovated before 1979 may contain PCB-containing fluorescent light ballasts, which require special handling during removal. PCBs are regulated by the EPA as toxic substances.

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