What are the requirements for a transformer oil containment pit?

The requirements for a transformer oil containment pit include a minimum capacity to hold 110% of the largest transformer’s oil volume, ensuring compliance with environmental regulations. The pit should be constructed from impermeable materials to prevent leakage, with proper drainage systems for rainwater. Additionally, it must be equipped with access points for inspection and maintenance, and should be located away from flood-prone areas to mitigate spill risks. Regular monitoring and maintenance are also essential.