DFD vs ERD. DFD and ERD are different data models that are mainly used for organizing business data for proper communication between members of a group. DFD shows how data enter a system, are transformed in that system, and how it is stored in it.
Freebase(0.00 / 0 votes)Rate this definition: Universal waste. Universal waste is a category of waste materials designated as hazardous waste, but containing materials that are very common. It is defined in 40 CFR part 273, by the United States Environmental Protection Agency but states may also have corollary regulations regarding these materials.
----- 2. Corrosive Wastes. A material would be defined by EPA as a corrosive waste if a representative sample of the waste had either of the following properties: (a) A pH less than 2 or greater than 12 as determined by a specified procedure.