A+ Environmental Solutions, LLC

In Situ Geochemical Stabilization (ISGS™) entails the use of modified permanganate solutions for the purposes of mass removal and flux reduction (i.e., NAPL stabilization). As the oxidant migrates through the treatment area, various (bio)geochemical reactions destroy the targeted compounds present in the dissolved phase. This causes a “hardening” or "chemical weathering” of the NAPL as it steadily loses its more labile components. This causes a net increase in viscosity of the organic material, which yields a more stable, recalcitrant residual mass.

In addition, the insoluble MnO2 precipitate that results from permanganate oxidation will accumulate along the NAPL interface, physically coating it and thereby reducing the flux of dissolved-phase constituents of interest (COI) into the groundwater.