Environmental

Polychlorinated biphenyls (PCBs) are a concern in older Kentucky commercial buildings primarily because they were used in:

AInsulation materials before 1978
BElectrical equipment such as transformers and capacitors✓ Correct
CFloor tile adhesives and caulking
DDrinking water pipes

Explanation

PCBs were widely used in electrical equipment including transformers, capacitors, and fluorescent light ballasts before they were banned in 1979. Older commercial buildings may contain PCB-containing equipment that requires special handling and disposal.

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