What are the specifications for a transformer oil sump pit?

The specifications for a transformer oil sump pit typically include a minimum depth of 1 meter to accommodate oil drainage and prevent overflow. The pit should be constructed from corrosion-resistant materials, such as reinforced concrete or steel, with a smooth finish to facilitate cleaning. It must have proper drainage systems, including a sump pump, and be equipped with a containment barrier to prevent environmental contamination. Additionally, the pit should comply with local regulations regarding hazardous materials.