Patent ID: 7399141

Claim:
A system for removing contaminants from contaminated soil at a site, comprising: a soil diagnostic testing and sampling facility comprising: means for extracting a representative sample of the contaminated soil from the site; means for segregating the sample into a plurality of size fractions according to particle size without any testing for contaminants being made; means for segregating each of the size fractions into a plurality of density fractions according to particle density prior to testing for contaminants; and means for testing the plurality of density fractions to identify contaminated fractions containing the presence of unacceptable levels of contaminants representing at least a portion of the total contaminant amount of the sample; and a contaminated soil removing facility adapted for removing soil fractions from the contaminated soil at the site corresponding to the contaminated fractions from the sample as identified by the soil diagnostic testing and sampling facility, said contaminated soil removing facility further comprising: means for extracting the contaminated soil from the site; means for isolating soil fractions from the contaminated soil at the site corresponding to the identified contaminated density fractions from the sample; means for processing the isolated soil fractions to remove the contaminants therefrom; means for treating the processed soil fractions from the site corresponding to the identified contaminated fractions with at least one stabilization reagent formulated for inhibiting the solubility of metal contaminants remaining in the processed soil; and means for returning the treated soil fractions to the site.