EHC® PRB for Long Term Treatment of CT Plume at a Grain Silo in Kansas

The EHC® PRB was installed as a line of direct push injection points across the width of the plume. Twelve years after the installation the PRB is still supporting >90% reduction in inflowing CT concentrations and the downgradient plume has reduced significantly in size and concentration.

Products
Type of Site

Grain Silo

Location

Kansas, USA

Contaminants Treated

Chlorinated Solvents

Groundwater emanating from a former grain storage area was impacted with carbon tetrachloride (CT). The CT plume extended approximately 2,500 ft (760 m) from a grain elevator where it discharged into a small creek. The CT source area was elusive with access restrictions due to residential housing further complicating the source clean-up. A permeable reactive barrier (PRB) was installed across the plume in April 2005. The PRB was created by injecting EHC® Reagent in a line of direct push injection points installed along the first available roadway located downgradient from the source area. This project represents the first full-scale application of EHC into a flow-through reactive zone and the PRB has remained active for twleve years now continuously supporting more than 95% removal of CT from groundwater, without accumulation of catabolites.