To qualify for a contained-in determination, your contaminated soil or groundwater must designate as a listed federal hazardous waste but be below the risk-based cleanup levels allowed under the Model Toxics Control Act (MTCA).
We calculate risk-based cleanup levels according to:
- MTCA Method A cleanup levels for unrestricted land uses (if applicable).
- MTCA Method B, using default exposure scenarios and risk assumptions.
We compare your analytical results against risk-based cleanup levels from MTCA and Universal Treatment Standards (UTS) levels for regulated hazardous constituents in your contaminated soil or groundwater.
When we review your request, we also consider the following:
- Quantity, locations, and age of samples used in your request
- Mobility and toxicity of contaminants in your soil or groundwater
- Potential impacts of these contaminants on landfill operations
We may require additional information from you before making a final decision on your contained-in request.
In most cases, we will require some additional site-specific management of your contaminated soil or groundwater. This can include:
- Covering truckloads of soil
- Spraying excavated soils with water for dust control
- Reporting requirements during and after disposal
- Other requirements necessary to protect human health and the environment
When we review your contained-in determination request, we examine potential risks and pathways of exposure.
Yes. Some debris may qualify under the contained-in policy. We recommend contacting your regional office before submitting your request.