PCB-Contaminated Transformer and Oil Disposal

What PCBs are and why they're regulated

Polychlorinated biphenyls (PCBs) are synthetic compounds historically used in transformer and capacitor insulating oils. They are persistent organic pollutants — toxic, slow to break down, and regulated internationally under the Stockholm Convention and in the UK under the Hazardous Waste Regulations and the Environmental Protection (Disposal of PCBs) Regulations.

Equipment containing PCBs above the regulated threshold must be decontaminated or disposed of through licensed routes. Incorrect handling exposes a business to significant environmental and regulatory liability.

How PCB-contaminated transformers are identified

Age and nameplate data are the first indicators — many transformers manufactured before the mid-1980s may contain PCB-contaminated oil. Where there is any doubt, oil samples are taken and laboratory-tested to confirm PCB concentration before a disposal route is agreed.

We scope this as part of the survey so the correct procedure and documentation are in place from the outset.

Drainage and containment procedure

Oil-filled units are drained under controlled conditions using bunded equipment to prevent spillage and ground contamination. Drained oil and the transformer carcass are kept segregated and labelled, and transported in compliant containers.

All handling follows the method statement agreed for the site, with spill controls and PPE appropriate to the hazard.

Licensed disposal routes and paperwork

PCB-contaminated oils and equipment are consigned to licensed hazardous-waste facilities only. You receive hazardous waste consignment notes and waste transfer documentation as standard, providing a complete and auditable record of disposal.

Frequently asked questions