As a one-time accountable manager for an airport including Jet A1 and AVGAS storage and delivery, permit me to make two points;
The fuel leaving the tank on its way into an aircraft tank must be totally free of any contamination. In other words, any filtration between the storage/delivery vehicle is there to remove any contamination that you do not know about, and is not to be used to remove contamination you know is there.
Perhaps teaching Granny to suck eggs.......when you have a contaminated tank and need to empty it and then clean it, before returning the fuel to it after it has been filtered, probably both on the way out and back again, the problem is usually having an empty contamination free tank of the same size to put it in!