What are the design requirements for a transformer oil soak pit?

The design requirements for a transformer oil soak pit include adequate capacity to contain potential oil spills, proper drainage to prevent water accumulation, and materials resistant to oil degradation. The pit should be lined with impermeable materials to prevent soil contamination and equipped with a sump pump for efficient oil recovery. Additionally, it must comply with local environmental regulations and have sufficient access for maintenance and inspection. Proper ventilation is also essential to mitigate fire hazards.