DSHW-2025-000913

Contained -Out Determinations for Soil
Soil may be managed as non-hazardous waste under the Resource Conservation and Recovery Act (RCRA)
Subtitle D Regulations when all of the following conditions are met:
1. Soil does not exhibit any of the characteristics of hazardous waste. This may be demonstrated
through generator knowledge and Toxic Characteristic Leaching Procedure (TCLP) testing of the
soil. All sampling data (including TCLP) must be representative of the soil;
2. Soil containing listed hazardous constituent(s) under Utah Administrative Code R315-261, Subpart D,
must be shown to meet acceptable cumulative risk-based exposures for an industrial receptor; and
3. Land Disposal Requirements (LDRs) are met.
If impacted soils do not exhibit a hazardous waste characteristic and they are not contaminated with a listed
waste, a contained-out determination is not required to dispose of the soil in a lined RCRA Subtitle D disposal
facility.
The Contained-Out Application is available on the DWMRC website at: Environmental Cleanup Program -
Utah Department of Environmental Quality
Risk-Based Determination
The purpose of the risk assessment is to demonstrate that handling of the soil containing a listed waste is
protective of the landfill (composite) worker. A cumulative risk assessment for the landfill worker, conducted
in accordance with Utah Admin. Code 315-101, is required. All of the following must be demonstrated in the
risk assessment provided with the Application.
● If a constituent has both carcinogenic and noncarcinogenic toxicity, both toxicities must be
addressed - include in cancer risk and hazard index calculations.
● Current United States Environmental Protection Agency (USEPA) Regional Screening Levels (RSLs)
for the Composite Worker (Industrial Soil) should be used.
● Cumulative carcinogenic risk for the industrial scenario must be below a target risk level of 1E-04.
● Noncarcinogenic hazard index (sum of all hazard quotients) must be equal to or below the target
level of 1.
● Average concentration of lead must be equal to or below 800 milligrams per kilogram (mg/kg), unless
a site-specific lead concentration has been developed and provided.