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A retained placard on an emptied unit.
Also known as: Residue marking transport, Uncleaned tank marking
In dangerous-goods transport a unit emptied of its load but not cleaned retains its placards, because residue leaves the hazard substantially unchanged.
Records that a unit emptied of its load but not cleaned remains placarded as though loaded.
Contexts: Packaging
Reflects that an empty tank may be more dangerous than a full one, a vapour-air mixture being explosive where a full tank of liquid is not.
Contexts: Packaging
The original diamond class placards and the rectangular orange plate left in place on a unit whose cargo has been discharged.