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.
EPA Characteristic Waste (D-List) Characteristic wastes exhibit the characteristics of ignitability, corrosivity, reactivity, or toxicity. Ignitability- having a flash point less than 140Â° F. Corrosivity- pH less than 2 or greater than 12.5. Reactivity- unstable, water or air reactive, generates toxic gases with. mixed with water, cyanide or sulfide that generates toxic gases on contact. with corrosive liquids, or explosive. Toxicity- wastes likely to leach concentrations of contaminants that may be.