Patent ID: 7381014

Claim:
A Natural Analog System (NAS) method to reduce the permeability of a ground, comprising: a) analyzing at least one characteristic of the ground selected from the group: hydrogeology, hydrochemistry, waste properties, remediation requirements, physical properties, and physical features; b) selecting at least one composition, wherein the composition is a solution or a solution and a gas phase, wherein the solution is selected from the group consisting of CaCl 2 (solution)+Na 2 CO 3 (solution), CaCl 2 (solution)+Na 2 SO 4 , (solution), CaCl 2 (solution)+Na 2 HPO 4 (solution), and CaCl 2 (solution)+NaOH (solution) based upon the at least one characteristic of the ground; c) impregnating the ground with the at least one composition, wherein constituents of the impregnated composition react to produce a precipitate that fills pore space in the ground; and d) repeating said impregnating step (c) until refusal occurs; thereby reducing the permeability of the ground.