The evaluation of Soil and Groundwater Remediation at an Industrial Site Using Risk Analysis
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Published:2006
Rosane Cunha Maia Nobre, Manoel de Melo Maia Nobre, Linice Cavalcante Bonaparte, 2006. "The evaluation of Soil and Groundwater Remediation at an Industrial Site Using Risk Analysis", 5th ICEG Environmental Geotechnics: Opportunities, Challenges and Responsibilities for Environmental Geotechnics: Proceedings of the ISSMGE’s fifth international congress organized by the Geoenvironmental Research Centre, Cardiff University and held at Cardiff City Hall on 26–30th June 2006, H. R. Thomas
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Abstract
Risk analysis was applied at an industrial site to evaluate the performance of a second-phase groundwater remediation program for the migration control of a 1,2 dichloroethane groundwater plume. Monitored natural attenuation was observed to be an effective method for the remediation of the dissolved phase downgradient a physical barrier as source control was achieved. In spite of the complete absence of human settlements at the site, human health risk was assessed to a point of compliance 265 m from the source area. This protective assumption was motivated by many risk assessment procedures such as the ASTM RBCA (E2081-00). The downgradient concentrations were calculated by the analytical model Biochlor®, assuming a first order degradation rate for 1,2 dichloroethane. The calculated human risk was considered tolerable. The predicted concentration at the point of compliance was also compared with some ecological standards as a preliminary ecological assessment and the comparisons also suggested a tolerable ecological risk.
