Soil and groundwater remediation

EHC® Liquid

EHC® Liquid is a concentrated, buffered microemulsion of a controlled-release, food-grade carbon, nutrients, and iron designed for on-site dilution with cold water.

The product is a liquid variant of EHC® and is specially designed for injection via existing wells or hydraulic injection networks for the treatment of a wide range of groundwater contaminants. EHC® Liquid is composed primarily of ELS® Microemulsion, a controlled-release organic carbon substrate and EHC® Liquid mix, an organo-ferrous compound (both food-grade). The anaerobic bioremediation processes and abiotic dechlorination reactions promoted by EHC® Liquid are effective at remediating chlorinated solvents, energetics, pesticides, and herbicides.


  • Stimulation of both abiotic and biotic dechlorination mechanisms
  • Structurally bound nutrients phosphorous and nitrogen released to bacteria
  • Anticipated longevity of 2-3 years depending on site conditions
  • Easy to handle and cold water soluble


  • Chlorinated solvents
  • Energetic compounds
  • Most pesticides
  • Haloalkanes
  • Nitrate compounds
  • Chromium

Key functions

  • Direct push injection
  • Gravity feed through existing wells
  • Low pressure injections
  • Recirculation systems


In situ chemical reduction (ISCR) is the combination of abiotic chemical reduction, using zero valent iron(ZVI) and/or reduced minerals (magnetite, pyrite), coupled with anaerobic bioremediation for the effective treatment of chlorinated solvents, pesticides, and energetics. Physical, chemical, and biological processes combine to create an extremely reduced environment that stimulates chemical and microbiological dechlorination of otherwise persistent compounds.

Technical Overview and White Papers

We will provide you with an overview of the different properties, mechanisms and key features of our various reductive remediation technologies for the removal of contaminated soil and groundwater.

EHC® Liquid application guides

We provide guidelines for the preparation of diluted EHC® Liquid for injection. The product is delivered as two components that are mixed together on site. 


This presentation will introduce biological and chemical processes in situ, make field comparisons between the biotic approach (ERD) and the ISCR approach, and show how ISCR enhances biological processes in sulfate-rich aquifers.

Contact and further information