The main contaminant of concern, aluminum, has decreased from a baseline concentration of 1,530 μg/L to 224 μg/L after ten months, which is well below the remedial goal of 750 μg/L. Significant reductions also have been observed in dissolved arsenic and copper downgradient from the PRB.
The remedial approach included excavation of the most highly impacted soil from the source area and the installation of a permeable reactive barrier (PRB) across the groundwater plume to prevent migration of residual metals into the adjacent river.
MetaFix was applied at various dosages (0.5%, 1.0%, and 2.0% w/w) to compare field performance of mercury stabilization via SPLP testing.
A lab treatability study was conducted to determine the optimal MetaFix Reagents formulation and dosing rate to treat the highly contaminated soil samples.
A lab treatability study was conducted to determine the optimal MetaFix reagent formulation and dosing rate to treat the four heavy metals of concern: As, Cd, Pb, and Zn.
A lab treatability study was conducted to determine the optimal MetaFix reagent formulation and dosing rate to treat the highly contaminated soil samples with a total arsenic concentration of 21,700 mg/kg.
EHC Metals Reagent is now a part of the MetaFix portfolio of customizable reagents. EHC Metals effectively treated TCE and immobilized Cr(VI) from groundwater to below detection limits at a manufacturing facility in Washington state.
