Why clean tank cars?

David Soderblom

An obvious question: why were the tank cars cleaned? The need is
obvious if it carries foods or if the commodity is changed, but in most
cases of tank cars used by refineries I would think the car carried the
same thing over and over, so why bother cleaning it?

Dave Soderblom
Baltimore MD

Join main@RealSTMFC.groups.io to automatically receive all group messages.