PCB Testing for Transformer Oil & Electrical Equipment

Environment Protection Services is a leading provider of comprehensive PCB testing and disposal services. Our in-house laboratory offers fast turnaround, while meeting and exceeding all EPA requirements and industry standards and guidelines.

After a thorough analysis and certification of all results, we provide a complete Chain of Custody record and Certified Analysis report to help our customers reduce liability and risk and ensure compliance with all applicable federal and state regulations.

What are PCBs?

PCBs (polychlorinated biphenyls) are man-made chemicals used in transformer insulating fluid due to their high boiling point and fire resistance. Because of their persistent, bioaccumulative, and toxic effect on the environment, the U.S. Environmental Protection Agency banned the manufacture of PCBs in 1979.

The EPA strictly regulates the disposal of PCBs and PCB-contaminated materials under the Toxic Substances Control Act (TSCA). Identifying whether a transformer contains PCBs is essential for proper handling and disposal.

Here's how to determine if a transformer might contain PCBs:

Inspect Nameplate

PCBs were marketed under different names. If any of the following names are found on the nameplate, this is an indication of PCB-containing oil. Trade names for PCBs could include:

  • Abestol, Aroclor, Askarel, Chlophen
  • Chlorextol, DK, EEC-18, Fenclor
  • Inerteen, Kennechlor, No-Flamol, Phenoclor
  • Pyralene, Pyranol, Saf-T-Kuhl, Solvol
  • Non-Flammable Liquid
Manufacture Date

Transformers manufactured before the 1979 ban are more likely to contain PCBs.

Visual Inspection

A visual inspection of a transformer for PCBs focuses on identifying potential leaks, signs of degradation, and the presence of PCB-containing materials. This inspection should include examining the transformer’s body, cooling system, connections, bushings, and other components for any signs of leaks or damage.

Oil Testing

The most accurate and reliable method to confirm the presence and concentration of PCBs is through laboratory testing of the transformer oil.

Regulatory Compliance Records

Consult operating logs, maintenance logs and reports, or other relevant records for information about previous oil changes or PCB content.

Why PCB Testing Matters

PCB concentration affects how electrical equipment and dielectric fluids must be handled and disposed of. The EPA regulates PCBs and PCB-contaminated materials under the Toxic Substances Control Act (TSCA), making accurate identification important for planning transportation, storage, treatment and final disposal.

Testing and Documentation

EPS analyzes submitted samples and provides a complete Chain of Custody record and Certified Analysis report after analysis and certification of results. This documentation can support internal compliance, disposal planning and project records.

Testing Methods

  • Oil sample analysis at the EPS laboratory
  • Gas chromatography (GC) to separate and quantify PCB compounds
  • Screening methods, including rapid screening approaches where appropriate


How to Identify Equipment That May Need Testing

Transformers manufactured before the 1979 PCB manufacturing ban are more likely to contain PCBs. Nameplate information, maintenance records, oil-change history, unusual fluid trade names and visible leaks can provide clues, but laboratory analysis is the most reliable way to confirm PCB concentration.

From Testing to Final Disposition

If testing confirms PCB contamination, EPS can also provide transformer disposal, PCB material disposal or transformer oil recycling services depending on the equipment, fluid concentration and project needs.

Request PCB testing. Provide the sample type, number of samples, equipment information and any project deadline or disposal decision that depends on the results.ParagraphButton