Must have clearly defined area that prevents mixing between materials and all storage bays/areas must be clearly marked for material type. [3 = Labeling should be large and visible, not worn away, also clear definition for separating gray vs. ductile iron returns or crane operator has an accurate map of the yard. 0 = If mixing between materials is visible and/or not clearly labeled or part separation walls are damaged. If not using any alloying materials = 0.]