Environmental

What is 'polychlorinated biphenyl' (PCB) contamination and why might it appear in older Oregon commercial buildings?

AA type of asbestos found in insulation
BToxic industrial chemicals used in electrical equipment and some building materials before 1979 that are now banned but may still exist in older Oregon properties✓ Correct
CA type of radon gas found in older buildings
DA lead paint compound found in pre-1950 buildings

Explanation

PCBs were used in electrical transformers, capacitors, hydraulic fluids, and some building materials (caulk, paint) before being banned in 1979. Older Oregon commercial and industrial buildings may contain PCBs in equipment or materials. PCB contamination is regulated under CERCLA and TSCA; PCB-containing materials require special handling and disposal. Due diligence for older Oregon commercial properties should investigate PCB presence.

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