Decision & Management Tools for DNAPL Sites: Optimization of Chlorinated Solvent Source and Plume Remediation Considering Uncertainty
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Pathway Identification During Successful ISCR-Enhanced Bioremediation of a TCE DNAPL Source Area
Groundwater at an active manufacturing facility on an 80-acre site in Portland, Oregon is impacted by TCE and its degradation products. Operations at the facility began in 1980, and included the use of TCE from approximately 1980 to 1989. TCE and/or TCE-containing wastewater were released to the subsurface in the early 1980s, roughly between 1980 and 1984. In 2006, concentrations of TCE and cis...
متن کاملCL:AIRE SABRE bulletins describe specific, practical aspects of research from the LINK Bioremediation Project SABRE, which aimed to develop and demonstrate the effectiveness of in situ enhanced anaerobic bioremediation for the treatment of chlorinated solvent DNAPL
The chlorinated solvents tetrachloroethene (PCE) and trichloroethene (TCE) have been used extensively in industry and are now amongst the most common and hazardous groundwater contaminants (National Research Council, 2004). These solvents are typically present as dense, non-aqueous phase liquids (DNAPLs) and represent long-term source zones that produce persistent contamination plumes in aquife...
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A stochastic remediation design optimization methodology implemented in the program Stochastic Cost Optimization Toolkit (SCOToolkit) was successfully applied to evaluate remediation options at the East Gate Disposal Yard (EGDY) at the former Fort Lewis, now Joint Base Lewis-McChord (JBLM), Washington. Non-optimized forward simulations based on calibrated parameters and their uncertainty inferr...
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Chlorinated solvents are the most prevalent organic contaminants found in ground water (Stroo et al. 2003), and in the dissolved phase they are typically mobile and recalcitrant, particularly trichloroethylene (TCE) and tetrachloroethylene (PCE). Schwille (1984, 1988) was the first to recognize that chlorinated solvent plumes (i.e., zones of dissolved phase contaminants) are caused by immobile ...
متن کاملCoupled Hydrologic and Geophysical Inversion for Characterization of Nonaqueous Phase Source Zones
Concentration plume evolution and chemical persistence at chlorinated solvent contaminated sites are typically controlled by the presence of dense nonaqueous phase liquid (DNAPL) mass within a highly contaminated region or DNAPL source zone. Characterization of both the extent and structure of the source zone DNAPL mass distribution is, thus, of great importance to site assessment and successfu...
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تاریخ انتشار 2011