If you are first on the scene of such a thing and you are employed by that company, then you should act to save lives, it is a moral and ethical responsibility. To wait for first responders is to condemn people, if there is something you could do.
As a lay person, not knowing the placarding symbols, there is nothing binding upon them to act, because they are unaware of the dangers.
As a lay person, not knowing the placarding symbols, there is nothing binding upon them to act, because they are unaware of the dangers.






