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UCLA Home / Campus Safety / Environment, Health & Safety / Hazardous Waste

Article ID: 1002754         Send us your feedback about this article  View the print friendly version of this article
Storage of Hazardous Chemical Waste
Summary: There are specific requirements for the storage of hazardous chemical waste.

Storage requirements for hazardous chemical waste in laboratories and work areas are specified under state regulations. Hazardous chemical waste accumulating in laboratories is subject to the following requirements:

  • Containers containing hazardous chemical waste must be labeled with an Online Hazardous Waste Tag at all times.
  • Waste must be collected and stored at or near the point of generation (same or adjacent room) and under the control of the laboratory where it was generated.
  • According to State law, the maximum amount of waste that can be stored in a lab is 55 gallons of a hazardous waste or one quart of extremely hazardous waste. If you reach these volumes of a specific waste stream, you must dispose of the waste to EH&S within three (3) days of reaching that volume.
  • All hazardous waste containers in the laboratory must be kept closed during storage except when waste is being added.
  • Hazardous chemical wastes must be compatible with the containers that they are stored in.
  • Containers that hold hazardous chemical waste must be stored in secondary containment at all times.
  • Containers must be in good condition with screw tops or sealed lids.
  • Incompatible waste must be segregated.


  • Frequent disposal will ensure that amounts of waste stored in labs are kept at minimal levels.
  • Once a waste container is full, it must be brought to the next waste pick-up designated for that building.
  • Once an experiment or process is completed, all partially filled containers must be brought to the next scheduled pick-up for that building.
  • UCLA policy states that hazardous chemical waste can only be stored in a lab for up to 90 days.

Segregation of Hazardous Waste

All hazardous materials should be stored and transported to prevent spills and uncontrolled reactions. Segregate chemicals by hazard class. Examples of proper segregation are:

  • Segregate acids from bases
  • Segregate oxidizers from organics
  • Segregate cyanides from acids

See our Segregation of Incompatible Chemicals Page for details.

Hazardous Materials Manager | Phone: (310) 794-5569

Hazardous Waste Line (to schedule a pickup)
Phone: (310) 206-1887


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