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FULL-SCALE APPLICATION OF EHC® LIQUID TECHNOLOGY FOR THE ISCR AND ERD TREATMENT OF AN AQUIFER CONTAMINATED WITH TETRACHLOROMETHANE AND CHLOROFORM
Leombruni, A., L. Collina, M. Avogadri, A. Trezzi, P. Trefiletti, M. Consonni, and C. Di Carlo.
15th International AquaConSoil Conference: Sustainable Use and Management of Soil, Sediment and Water Resources, 20-24 May, Antwerp, Belgium, 2019

EHC® technology was applied to a highly-industrialized site in northern Italy, where groundwater was primarily contaminated with >10 ppb tetrachloromethane, >10 ppb chloroform, >2 ppb Cr(VI), and small amounts of PCE and TCE. In the intervention area and downstream, 10 wells were dug to accelerate the removal of various contaminants. During remediation, some wells were shut down to prevent an increase in groundwater speed and emulsion removal and to remodulate the flow. After ~15 months from injection in the main source area, contaminant concentrations were reduced compared to the pre-treatment concentrations. By 25 months post injection, CVOC concentrations in wells directly downgradient of the source zone had decreased by >99% without significant rebound or daughter product generation. See pages 181-189 at https://www.aquaconsoil.org/assets/acs2019_proceedings_lores.pdf.



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