Storage of General Hazardous Chemical Waste

General Hazardous chemical waste accumulating in laboratories is subject to the following requirements:

  • Must be labeled with a 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 ban 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.


  • Disposal
  • -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 broguht 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.

    Hazardous Waste Pick-up

  • Segregation of General & Chemical Hazardous Waste

  • Segregate chemicals by hazard class. Examples of proper segregation include separating:

    -acids from bases
    -oxidizers from organics
    -cyanides from acids

    Segregation of Incompatible Chemicals