In-Situ Chemical Reduction (ISCR)

ISCR uses reducing agents to transform contaminants into less toxic or less mobile forms. ISCR can remediate several types of contaminants from groundwater and soils, including many chlorinated compounds (PCE, TCE, DCE, VC, Carbon Tetrachloride, Pentachlorophenol) and metals (Hexavalent Chromium, Cadmium).

Chemical reduction can be implemented using different methods, including in-situ injections, permeable reactive barriers (injected or trenched), or soil mixing (in-situ or excavated soils).  

"Chemical reduction chemistries are not limited to ZVI. Specific chlorinated VOCs and metals are treatable with iron-, polysulfide-, and zinc-based materials."
Grant Geckeler
Director of Remediation Services

Enhanced in-situ dechlorination

Summary: EZVI (emulsified ZVI) injections were made via direct push technology to remediate TCE and daughter products in a 6-foot vertical saturated interval (from 14 to 20 ft bgs). 

A customized EVO-ZVI solution with SDC-9 bacteria was injected through temporary DPT locations. 

11 months later, groundwater analyses confirmed that the single injection event reduced TCE concentrations by 99.7% and reduced total VOC concentrations by > 97%.