Special waste

Special waste is a category of Washington state-only dangerous waste that meets the following criteria:

  • Conditionally excluded state-only dangerous waste
  • Solid only (not liquid, aqueous, or gaseous)
  • Must be fully designated before it can be identified as special waste

How to manage special waste

Generators can manage special waste in one of two ways:

  • As fully regulated dangerous waste,
  • Follow the conditional exclusion requirements.

Condition exclusion requirements

To take advantage of the conditional exclusion of special wastes (WAC 173-303-073), generators must do at least one of the following:

  • Dispose of their waste in hazardous or municipal solid waste landfills
  • Recycle the waste on-site or off-site
  • Treat the waste in a way that is consistent with our treatment by generator guidance

Examples of possible special wastes

  • WSC2: Spent polymerization catalyst, sodium hydroxide, aluminum hydroxide, and batteries.
  • WT02: Contaminated absorbents and debris, evaporator condensate, pollution control filter cake, and paint.
  • WP02: Resins, adhesives, dried paint, sealant, grease, tar, metal machining wastes, and contaminated soil and absorbents.