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Process for isolating contaminated soil

  • US 5,370,478 A
  • Filed: 09/01/1993
  • Issued: 12/06/1994
  • Est. Priority Date: 05/11/1993
  • Status: Expired due to Term
First Claim
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1. A process for the in situ formation of continuous, substantially impermeable barriers in the saturated zone below the water table which comprises (a) injecting into a first location in said zone an aqueous stream which can be caused to form a gel, (b) removing groundwater at a second location in said zone which is spaced horizontally from said first location, and (c) causing said stream to gel, the combined effect of injection step (a) and groundwater removal step (b) being to cause said aqueous stream to proceed from said first location toward said second location;

  • said aqueous stream being an aqueous solution or sol having a viscosity and density similar to that of water, and a gelling time sufficiently long to allow subsurface migration from the point of injection to the point at which water is removed from said second location.

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