Environmental

Polychlorinated biphenyls (PCBs) in Texas may be found in older commercial buildings in:

AConcrete foundations
BFluorescent light ballasts and electrical transformers manufactured before 1979✓ Correct
CPlumbing fixtures
DWindow glass

Explanation

PCBs were used in fluorescent light ballasts, electrical transformers, and caulking in buildings constructed before PCBs were banned in 1979 (Toxic Substances Control Act). Their presence in older commercial buildings can be a contamination concern.

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