Contamination of a state railway brakeyard
The main source of contamination was a fuel spill that occurred in 1995. The breakage of an underground pipeline resulted the release of approximately 80 m³ diesel oil.
Hungarian State Railway Brakeyard The breakage of an underground pipeline resulted in the release of approximately 80 m³ of diesel oil, which in the absence of immediate intervention reached the groundwater, migrated away and contaminated the gravel terrace of an adjacent river. The impacted area covers approximately 0.2 hectares. Technology Soil excavation, soil bioremediation (in-situ), bioventilation Groundwater dual pump system skimming and activated carbon adsorption. Comments The site is densely covered with railway lines, and a full rehabilitation of the old yard was decided in 1996, including reconstruction of rails and construction of wastewater treatment facilities. The remediation work is performed by Dekosta-Biokör as a subcontractor. Project Status: Before completion Media (quantity in m³) Soil and ballast (ex-situ): 3000m³ Soil (in-situ): 7000m³ Groundwater: 5000m³ Contaminants: diesel oil, lubrication oil Client: Hungarian Public Railway Inc. Project Manager: József Varga, Judit Tóth
Date of Operation: 1996- Comments: Remedial work must be performed without any disturbance of the brakeyard operation Cleanup Goals: Residual hydrocarbons in soil: 1000 ppm, in groundwater <0.3 mg/l Contaminant concentration before treatment: Excavated soil ranged from 5000 ppm to 50000 ppm diesel and lubrication oil contaminated soil treating in-situ 1000-5000 ppm in groundwater 60 m³ free phase hydrocarbon dissolved diesel oil 2-10 mg/l. Contaminant concentration after treatment: in soil diesel oil <500 ppm, gasoline< 100 ppm in groundwater gasoline <0.1 ppm |
