Environmental

Polychlorinated biphenyls (PCBs) were widely used in which building component that may be found in pre-1979 NC commercial buildings?

AInsulation batts
BElectrical transformers and capacitors, and some caulking✓ Correct
CCopper plumbing
DHardwood flooring

Explanation

PCBs were commonly used in electrical transformers, capacitors, and some older caulking materials in buildings constructed before the US EPA banned their manufacture in 1979. PCBs are toxic and carcinogenic, requiring careful remediation.

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