How is disposal of oil filled transformers regulated and performed safely?

Disposal is regulated through environmental and hazardous waste laws, especially if oil contains PCBs. Safe disposal involves de energizing, draining oil into labeled containers, sampling and testing for PCBs, transporting via licensed carriers, and recycling or destroying oil at approved facilities. The transformer body is dismantled and recycled, and contaminated components are handled as hazardous waste. Documentation such as manifests, SDS, and certificates is required to prove compliant handling.