ISGS® Technology

ISGS® remediation technology utilizes a permanganate-based solution to geochemically stabilize dense non-aqueous phase liquids (DNAPL) in the aquifer.

Permanganate and other proprietary reagents are selected depending upon the particular characteristics of each location and custom mixed on site into an aqueous solution that can be injected into an aquifer either through existing wells or direct push technology. As the solution migrates through the treatment area it oxidizes contaminants yielding partial mass removal. The ISGS technology also reacts with contaminants in the treated area thereby coating NAPL surfaces with stable mineral precipitates that reduce mass flux.


  • Prevents contaminants from leaching into environment
  • Application and treatment can be done in situ
  • Can be more cost effective and efficient than conventional cement stabilization
  • PAHs
  • Chlorinated Solvents
  • Creosote

When released into the environment, chlorinated solvents, coal tar, creosote, and heavy crude oil are frequently present as DNAPL and represent a long term secondary source of contamination. Physical removal or in situ remediation of DNAPL is not always practicable due to the depth of contamination, aquifer geology, the presence of physical surface structures, or other factors making hydraulic containment (e.g., long-term pump-and-treat) or in situ stabilization the only viable remedial action. The process of In Situ Stabilization prevents or slows harmful chemicals from contaminated soil, sediment and sludge, from leaching into the environment. The contaminants are chemically immobilized under ground making them less likely to be released into the environment.

Key Functions
  • Fixed well injections
  • Direct push injections