Semiconductor/Spectra-Physics Industrial Superfund Site Enhanced Reductive Dechlorination

FTCH designed and implemented a full-scale biotreatability study in the source area of the Former Teledyne Semiconductor Superfund cleanup site in Silicon Valley, California. The study demonstrated that enhanced reductive dechlorination (ERD) is effective in the destruction of chlorinated solvents. The study has provided the basis to change the cleanup remedy in the Record of Decision (ROD) from pump-and-treat to ERD. Full scale design/implementation work consisted of approximately 150 injection/recirculation wells in three impacted groundwater zones and emulsified soybean oil was injected as the carbon source. After the remedy was implemented, performance monitoring data supported the conclusion that ERD has been highly successful in abating the solvent contamination.