Waste services
Contaminated soil disposal
Remediation volumes, treatment standards, and the generator status question that comes with them.
Contaminated soil that is hazardous waste must meet land disposal restriction treatment standards before land disposal. Alternative soil treatment standards at 40 CFR 268.49 apply, and the sheer weight of soil frequently pushes a site into large quantity generator status.
Source: 40 CFR 268.49Weight changes your generator status
Soil is heavy. A single roll off of contaminated soil can exceed 20 tonnes, which is well past the 1,000 kg monthly threshold that makes a site a large quantity generator. A remediation project turns a small generator into an LQG for the duration.
That brings 90 day accumulation limits, contingency planning, training and biennial reporting. The episodic generation provisions at Part 262 Subpart L exist partly for exactly this situation and are worth considering before the excavator starts.
Treatment routes for contaminated soil
- Thermal desorption for organics, volatilizing contaminants for capture and destruction
- Stabilization for metals, binding contaminants against leaching
- Soil washing where particle size distribution suits it
- Bioremediation for suitable organics where time allows
- Direct landfill where the soil already meets the treatment standard
- Incineration for heavily contaminated organic soils
Alternative soil treatment standards at 40 CFR 268.49 generally require a 90 percent reduction in constituent concentration, capped at ten times the universal treatment standard. That is frequently easier to meet than the standard for the underlying waste.
Characterize before you dig
Excavation commits you. Once soil is in a pile it has to go somewhere, and the characterization that determines where should already exist.
Sampling ahead of the work sets volumes, routes and cost with reasonable confidence. It also identifies the boundary between hazardous and non hazardous material, which is frequently where most of the money is.
Common questions
Is all contaminated soil hazardous waste?
No. Soil is hazardous waste only if it contains a listed waste or exhibits a characteristic. Much remediation soil is contaminated but not RCRA hazardous, and is managed as non hazardous or special waste at materially lower cost.
What is the contained-in policy?
Environmental media containing listed hazardous waste is managed as hazardous until a regulator determines it no longer contains it at levels of concern. That determination is made case by case and is worth pursuing on large volumes.
Will a remediation project change my generator status?
Very likely, given the weight involved. Plan for LQG duties during the project, or evaluate whether the episodic generation provisions fit, before the work begins.
Related services
Not sure how this applies to your site?
Send a profile, an old manifest, or photographs of the drums. A technical professional will tell you where you stand.
This page summarizes federal requirements and is not legal advice. State programs can be more stringent than the federal baseline. Verify against current federal and state regulations before acting. Last reviewed September 2026.