Contained-in determinations for contaminated soil and groundwater

If you are disposing of soil or groundwater contaminated with a listed dangerous waste, you must manage the entire volume as if it were dangerous waste until it no longer contains the dangerous waste or is de-listed.

Under the contained-in policy, we may determine that your contaminated soil or groundwater no longer contains a listed dangerous waste or is below risk-based levels.

How do I request a contained-in determination for contaminated media?
What do I need to include in my request?
What is my responsibility and how does Ecology review my request?