What must be confirmed before loading HAZMAT into a railcar?

Before loading hazardous materials (HAZMAT) into a railcar, it is critical to confirm that the car is clean and free of incompatible residues. This requirement is essential to prevent chemical reactions that could occur if HAZMAT comes into contact with substances that may react adversely. Residues from previous cargoes can pose significant safety risks, potentially leading to leaks, spills, or hazardous emissions. Ensuring that the railcar is in a suitable condition for HAZMAT loading is part of maintaining safety standards during transportation.

While other factors such as being checked for leaks or sealed tightly are important for operational safety, they do not address the fundamental issue of preventing dangerous chemical interactions. Therefore, clearing the railcar of any incompatible residues is the priority before any loading occurs.