EHC-L by Adventus, is a cold-water soluble formulation of EHC that is specially designed to be emplaced via existing wells and/or hydraulic injection networks for the treatment of a wide range of groundwater contaminants. . EHC-L is a stable, buffered, micro-emulsion of slow-release, food-grade carbon (lecithin), ferrous iron and a redbox buffer (cysteine). EHC-L is designed for on-site dilution with cold water and subsequent application via screened wells or direct push technology for the treatment of compounds amenable to reductive transformation, including chlorinated hydrocarbons and some dissolved heavy metals. It generates both biotic and abiotic reductive mechanisms and capitalizes on synergies between the two.