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Natural Attenuation Software (NAS) Application and Demonstration Case Study

Biodegradation of Chlorinated Ethenes and Benzenes, Site 3, Naval Air Station (NAS) Cecil Field, Jacksonville, Florida
For approximately 20 years a pit (Operable Unit 8, Site 3) on grounds of the Naval Air Station (NAS) Cecil Field, Jacksonville, Florida, was used to dispose of spent fuels, oils, solvents, paint, and paint strippers (until 1975). Remediation of the site included in-situ air sparging of contaminants from the source area and monitored natural attenuation (MNA) of downgradient ground water contaminated with chlorinated ethenes and benzenes. Water-quality monitoring data from the site is being used to evaluate the ability of the Natural Attenuation Software (NAS) package to estimate cleanup times associated with combining the remediation of a contaminant source-area with using Monitored Natural Attenuation (MNA) to remediate the remaining downgradient contaminant plume. This site is one of eight demonstration sites that make up a diverse set of geologic, hydraulic, and geochemical environments. The evaluation is being conducted by the U.S. Navy, Virginia Polytechnic Institute and State University (Virginia Tech), and U.S. Geological Survey (USGS), with funding from the Environmental Security Technology Certification Program (ESTCP).

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