Environmental

Polychlorinated biphenyls (PCBs) that may be found in older Utah commercial buildings are regulated because they are:

AA naturally occurring soil condition
BA toxic substance linked to cancer and other health effects, banned from new use since 1979✓ Correct
CA type of lead-based paint
DA harmless chemical used in insulation

Explanation

PCBs are toxic industrial chemicals used in electrical equipment and building materials. Banned from most uses in 1979 under TSCA, they may still be found in older buildings and require regulated disposal.

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