What hazards are associated with PCB transformer oil and how are they regulated?

PCB transformer oil poses severe health and environmental hazards due to its toxicity, carcinogenic potential, and persistence in ecosystems. Exposure risks include skin absorption, inhalation, and long-term bioaccumulation. Regulations strictly control identification, labeling, handling, transport, and disposal of PCB oil. Legacy transformers must be tested for PCB content, and contaminated oil must be disposed of at licensed hazardous waste facilities. Unauthorized reuse or discharge is prohibited under environmental and occupational safety laws.