Many people are living dangerously today and they are oblivious to the massive risk they are taking!
Electrical substations have oil-filled transformers. A catastrophic failure can cause the loss of large amounts of oil from the transformers and can cause a fire and damage containment bunds resulting in soil and water contamination. Major power supply substations usually have two levels of pollution control for oil spills. The first level (or primary containment) is a bund (or retaining wall) which can contain any spillage. The second level (or secondary containment) is a backup if the first level fails. This can be another bund or an overflow area (like a dam). Two levels of containment is deemed to be sufficient to prevent the pollution of the soil or waterways where there is a significant risk of spillage of hazardous liquids. When these two levels of containment are in place, there is little risk of a spillage having an impact on the surrounding environment. This is an acceptable industrial risk. (more…)