Step two: Is it exempt or excluded?

When managed under specific requirements, some dangerous wastes are exempt or conditionally excluded from the regulations.

Exempt or conditionally excluded wastes

  • Some materials are not considered solid waste or are exempted from solid waste.
    For example: Reclaimed commercial chemical products. (see WAC 173-303-016).
  • Some materials are exempted from being solid waste because the material is being recycled and can be used in place of virgin materials without carrying extra chemicals.
    For example: Pulping liquors reused for pulping. (see WAC 173-303-017).
  • Materials that are solid waste may be excluded from being designated as dangerous waste based on what they are or how they are used.
    For example: Scrap metal being recycled or irrigation return flows. (see WAC 173-303-071).


These dangerous wastes are excluded from part or all of the requirements. Often the waste must meet specific conditions to qualify for the exclusion (see WAC 173-303-071(3)).

Recycling wastes

Some wastes can be recycled easily. If you follow the requirements for recycling the wastes listed below, they are excluded from all other dangerous waste requirements:

Learn more about recycling requirements for state-only dangerous waste.

Continue to Step three: Is it listed?