Natural and Enhanced Attenuation of Chlorinated Solvents Using RT3D
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A Deterministic Approach to Evaluate and Implement Monitored Natural Attenuation for Chlorinated Solvents
Brian B. Looney A US EPA directive and related technical protocol outline the information needed to determine if monitored natural attenuation (MNA) for chlorinated solvents is a suitable remedy for a site. For some sites, conditions such as complex hydrology or perturbation of the contaminant plume caused by an existing remediation technology (e.g., pump-and-treat) make evaluation of MNA using...
متن کاملA case study for demonstrating the application of U.S. EPA's monitored natural attenuation screening protocol at a hazardous waste site.
Natural attenuation assessment data, collected at a Superfund site located in Louisiana, USA, are presented. The study site is contaminated with large quantities of DNAPL waste products. Source characterization data indicated that chlorinated ethene and ethane compounds are the major contaminants of concern. This case study illustrates the steps involved in implementing the U.S. EPA's [U.S. EPA...
متن کاملKey Words: Environment Remediation Chlorinated Solvents Retention: Permanent ENHANCED ATTENUATION: A REFERENCE GUIDE ON APPROACHES TO INCREASE THE NATURAL TREATMENT CAPACITY OF A SYSTEM
s of Remediation Case Studies vol 1-8(prepared for the Federal RemediationTechnologies Roundtable FRTR)www.epa.gov/tio/pubitech.htm WSRC-TR-2005-00198, Rev. 0January 5, 2006Page 147 of 147 This page intentionally left blank.
متن کاملFactors controlling BTEX and chlorinated solvents plume length under natural attenuation conditions.
Natural attenuation is presently used at numerous sites where groundwater is contaminated. In order to simulate this attenuation, reactive transport models are often used but they are quite complex and depend on both physical and chemical conditions in the aquifer. As complex numerical models cannot be used to study all possible cases, we develop here analytical solutions to draw general conclu...
متن کاملMicrobial Processes Affecting Monitored Natural Attenuation of Contaminants in the Subsurface
It should be emphasized that this document is not intended to be used in establishing protocol involved in natural attenuation investigations or policies leading to the interpretation of the results of those investigations. To that end, the reader is referred to the EPA Protocol for chlorinated solvents (U.S. EPA, 1998a), and ASTM for petroleum hydrocarbons (ASTM, 1998). EPA is also preparing a...
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تاریخ انتشار 2006