Stanford University

Empty Container Decision Tree

Last updated: August 21, 2023
Tool TypeDecision Tree

How to Use

How to Use

Handle chemical waste materials as hazardous substances unless they are on the List of Non-Hazardous Chemical Wastes. Used hazardous materials containers are an exception, however. The Empty Container Decision Tree determines whether they are hazards.

To use the Empty Container Decision Tree, the container must be completely empty. This means:

  • Liquids must be removed as well as possible. This is demonstrated by the "three shakes" rule. If no liquid comes out after three shakes when inverted, it is empty.
  • Any solid residue must be scraped out.
  • Aerosol cans must be used to the maximum extent under normal conditions of use. All propellant must be emptied.

See decision tree

Back to Top

Download full instructions here ->