Method to remediate soil and groundwater

• US 10,252,303 B2
• Filed: 06/01/2016
• Issued: 04/09/2019
• Est. Priority Date: 06/01/2015
• Status: Active Grant

• Current Assignee: James Dawe, Michael Lindstrom
• Original Assignee: James Dawe, Michael Lindstrom
• Inventors: Lindstrom, Michael, Dawe, James
• Primary Examiner(s): Mayo-Pinnock, Tara
• Application Number:
  US15/170,641
• Publication Number:
  US 20160346818A1
• Time in Patent Office: 1,042 Days
• Field of Search: 40512875
• CPC Class Codes: B09C 1/002 involving in-situ ground water treatment
• CPC Class Codes: B09C 1/08 chemically

Abstract

This present invention is directed to a method to remediate soil and groundwater. Embodiments of the present invention can be conducted ex-situ within the footprint of the area to be remediated. The method utilizes hydrogen peroxide.

Claims

1. A method to simultaneously remediate at least one contaminant in soil and groundwater in-situ in a treatment area, comprising:

providing an oxidant to the soil and the groundwater in-situ, wherein the oxidant is not combined with an additive or an additive in the soil or the groundwater;

mechanically mixing the oxidant with the soil and the groundwater;

contacting the oxidant with the soil and the groundwater to produce a remediated soil and a remediated groundwater; and

redistributing the remediated soil in the treatment area.

2. The method of claim 1, wherein the oxidant is hydrogen peroxide;

and

wherein the step of mechanically mixing comprises mechanically mixing the hydrogen peroxide and the soil in the treatment area.

3. The method of claim 2, wherein a ratio of the hydrogen peroxide to the soil is between about 1 lb oxidant:

49 lbs soil and about 1 lb oxidant;

105 lbs soil.

4. The method of claim 1, further comprising at least one additional remediation cycle, wherein the at least one additional remediation cycle comprises:

measuring the at least one contaminant level in the remediated soil;

providing an additional amount of the oxidant to the remediated soil;

mixing the additional amount of the oxidant and the remediated soil in the treatment area to produce further remediated soil.

5. The method of claim 4, wherein the oxidant comprises hydrogen peroxide.

6. The method of claim 4, wherein the at least one additional remediation cycle is repeated until all contamination levels of the at least one contamination in the further remediated soil is below a regulation limit.

7. The method of claim 1, wherein the at least one contaminant in the soil is selected from the group consisting of a petroleum hydrocarbon, a polyaromatic hydrocarbon and a chlorinated solvent.

8. The method of claim 1, further comprising measuring at least one contaminant level in a base of the treatment area, or at least one sidewall of the treatment area.

9. The method of claim 8, further comprising increasing an area of the treatment area if the at least one contaminant level in the at least one side wall of the treatment area or the at least one base of the treatment area is greater than a regulation limit.

10. The method of claim 1, wherein a temperature during the mechanical mixing is between about 0°

F. and about 140°

F.

11. The method of claim 1, further comprising measuring a level of the at least one contaminant after between about 48 hours and about 72 hours.

12. The method of claim 1, wherein the oxidant does not include a chelating agent, an iron compound, or a pH adjuster.

13. The method of claim 1, further comprising pre-analyzing a level of the at least one contaminant in the soil of the treatment area.

14. The method of claim 1, further comprising determining feasibility of the method for the treatment area.

15. The method of claim 1, wherein the soil is at least one of a silty fine grain sand, a weathered sandstone, a fractured bedrock sandstone, a claystone, a fine grain sand, a silty sand, a silt, or a clay.

16. The method of claim 1, further comprises:

mixing the oxidant with the groundwater; and

allowing the oxidant to contact the groundwater following mixing.

17. The method of claim 16, wherein the concentration of the oxidant is between about 17.5% and about 34%.

18. The method of claim 16, wherein a ratio of the oxidant to the groundwater is between about 1 lb oxidant:

0.6 gallons of groundwater and about 1 lb oxidant;

23 gal groundwater.

19. The method of claim 1, wherein a ratio of the oxidant to the soil is between about 1 lb oxidant:

49 lbs soil and about 1 lb oxidant;

105 lbs soil, wherein the oxidant is hydrogen peroxide at a concentration between about 17.5% and 34%.

20. The method of claim 1, wherein the oxidant consists of hydrogen peroxide.