How are PCBs detected and removed from transformer oil?

PCBs in transformer oil are detected using laboratory methods such as gas chromatography-mass spectrometry (GC-MS) or immunoassay techniques. For removal, techniques include adsorption using activated carbon, chemical dechlorination, or thermal treatment. Additionally, oil filtration systems can be employed to separate PCBs from the oil. It is crucial to follow environmental regulations for disposal and remediation to ensure safe handling of PCB-contaminated materials.