What combination of tasks is expected during the 'load on top' procedure?

The 'load on top' procedure refers specifically to the practice of storing new cargo atop a pre-existing substance in a tank, which can often lead to mixtures that require careful management. The combination of collecting and settling mixtures followed by discharging is key because, during this process, the operator must ensure that any sediment or impurities in the tank are properly dealt with after loading. This significantly reduces the risk of contamination between the new cargo and any residual products, which is critical for maintaining the quality of the new load and adhering to regulatory standards.

In this context, the procedure emphasizes the importance of proper cargo handling, ensuring safe operations, and maintaining the integrity of the products. Settling involves allowing the different components of the mixture to separate so that the unwanted substances can be discharged safely, preventing them from being mixed with the new cargo. This highlights the operational diligence necessary in tanker management during loading operations.