What must be kept separate when containerizing petroleum fluids?

The correct answer is the separation of synthetic fluids when containerizing petroleum fluids. It is essential to keep synthetic and petroleum-based fluids separate due to differences in their chemical compositions and properties. Mixing them can lead to incompatibility issues, affecting the performance and stability of the fluids.

Synthetic fluids often have specific formulations designed for particular applications, and their unique characteristics could be compromised when mixed with standard petroleum fluids. Additionally, chemical reactions between incompatible fluids can potentially create hazards or diminish the effectiveness of the individual fluids.

It is vital to maintain this separation to ensure safety, equipment integrity, and compliance with handling procedures for various types of petroleum fluids. Organizations typically have strict guidelines on how to appropriately manage and containerize different types of fluids to prevent any potential risks.