Method and system for removing contaminants from soil
AssigneeBrice Environmental Services Corporation
InventorsThomas Alan Benjamin, Craig Jay Jones, Luther Alba Brice
Life of this patent
Estimating the term…
Abstract
A method and system for removing contaminants from contaminated soil at a site utilizes particle size segregation and particle density segregation to yield a plurality of fractions, whereby each of the fractions are tested and identified for the presence of unacceptable levels of contaminants, and the soil fractions from the contaminated soil at the site corresponding to the identified contaminated fractions are collected for subsequent disposal or treatment, while the remaining untainted soil fractions are homogenized and returned to the site.
Claims30
A method for removing contaminants from contaminated soil at a site, comprising the steps of:
- soil diagnostic testing including the steps of:
- extracting a representative sample of the contaminated soil from the site;
- segregating the sample into a plurality of size fractions according to particle size without any testing for contaminants being made;
- segregating each of the size fractions into a plurality of density fractions according to particle density prior to testing for contaminants;
- testing the plurality of density fractions to identify those containing the presence of unaccepteble levels of contaminants representing at least a portion of the total contaminant amount of the sample;
- and
- field system design and implementation based upon said soil diagnostic testing including the steps of:
- extracting the contaminated soil from the site;
- isolating soil fractions from the contaminated soil at the site corresponding to the identified contaminated density fractions from the sample;
- processing the isolated soil fractions to remove the contaminants therefrom;
- treating the processed soil fractions from the site corresponding to the identified contaminated fractions with at least one stabilization reagent capable of inhibiting the solubility of metal contaminants from the processed soil;
- and
- returning the treated soil fractions to the site.
A method for removing contaminants from contaminated soil at a site, comprising the steps of:
- soil diagnostic testing including the steps of:
- extracting a representative sample of the contaminated soil from the site;
- segregating the sample into a plurality of size fractions according to particle size without any testing for contaminants being made;
- segregating each of the size fractions into a plurality of density fractions according to particle density into a first density fraction having a specific density corresponding to vegetative matter, a second fraction having a specific density corresponding to metal, and a third density fraction having specific density intermediate of the vegetative matter and metal, prior to testing for contaminants;
- testing the plurality of density fractions to identify those containing the presence of unacceptable levels of contaminants representing at least a portion of the total contaminant amount of the sample;
- and
- field system design and implementation based upon said soil diagnostic testing including the steps of:
- extracting the contaminated soil from the site;
- isolating soil fractions from the contaminated soil at the site corresponding to the identified contaminated density fractions from the sample;
- processing the isolated soil fractions to remove the contaminants therefrom;
- and
- returning the processed soil fractions to the site.
Dependencies are inferred from the claim text.