In Situ Chemical Reduction vs. Enhanced Reductive Dechlorination

Comparison of In Situ Chemical Reduction (ISCR) to Enhanced Reductive Dechlorination to treat trichloroethene in an aerobic aquifer.

Contaminants Treated

Trichloroethene (TCE)


Concord, CA

Type of site

Naval Weapons Base


In Situ Chemical Reduction (ISCR) using ELS® Microemulsion was compared to Enhanced Reductive Dechlorination (ERD) to treat groundwater affected by trichloroethene (TCE). Two pilot tests were conducted that compared the rates of contaminant degradation as well as other biogeochemical processes of both processes.


The ISCR process was demonstrated to degrade the TCE substantially faster than the ERD process while minimizing the generation of vinyl chloride. ISCR is currently being applied to treat the extended TCE plume.