Defining Hazardous Waste
The Environmental Protection Agency (EPA) has defined a hazardous waste as any material that no longer has a use and is either specifically listed in the regulations or meets defined hazard characteristics.
Wastes exhibiting any of the following characteristics.
- Liquids that have a flash point less than 140°F (60°C)
- Flammable solids
- Flammable compressed gases
- Aqueous solutions with pH less than 2 and greater than 12.5
- Corrodes steel
- Water reactive substances
- Unstable or explosive chemicals
- Cyanide or sulfide containing chemicals that generate toxic gases when exposed to corrosive substances
- Materials that have certain heavy metals or organic constituents above regulated limits (EPA D List) (see 40CFR 261)
- Materials that meet or exceed TCLP laboratory testing
- Contact EH&S for additional toxicity information
Specifically listed chemicals: (see 40CFR 261)
The EPA has specifically listed approximately 500 chemicals as hazardous waste.
- EPA P List
- EPA U List
- EPA F List
- EPA D List