Environmental

In Illinois, the presence of polychlorinated biphenyls (PCBs) in a commercial building's electrical transformers is significant because:

APCBs improve the efficiency of electrical systems and increase property value
BPCBs are classified as probable human carcinogens and their disposal is strictly regulated; their presence in a building can create significant remediation costs✓ Correct
CPCBs cause immediate structural damage to buildings
DPCBs only affect outdoor areas, not indoor air quality

Explanation

PCBs (polychlorinated biphenyls) were widely used in electrical equipment (transformers, capacitors) until banned in 1979. They are classified as probable human carcinogens and persistent environmental pollutants. Buildings with PCB-containing equipment face significant remediation costs and regulatory requirements under TSCA (Toxic Substances Control Act). Illinois commercial property transactions involving older industrial or commercial buildings should assess for PCB-containing equipment.

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