What procedures apply when transformer oil spills occur?

Spill response starts with safety isolation and stopping the source if safe, then immediate containment to prevent migration to drains, soil, or water. Use bunding, absorbent booms, pads, and drain covers. Notify site environmental and safety personnel and follow local reporting thresholds. Recover free oil, collect contaminated absorbents and soil for proper disposal, and document the incident. After cleanup, inspect the transformer, verify oil level and dielectric condition, and implement corrective actions to prevent recurrence.