Frequent Questions

How is ?soil? defined for purposes of the land disposal restrictions (LDR) alternative soil treatment standards in 40 CFR §268.49?

Soil is defined as unconsolidated earth material composing the superficial geologic strata (material overlying bedrock), consisting of clay, silt, sand, or gravel size particles as classified by the U.S. Natural Resources Conservation Service, or a mixture of such materials with liquids, sludges, or solids that is inseparable by simple mechanical removal processes and is made up primarily of soil by volume based on visual inspection (§268.2 Exit EPA).

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