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USACE Savannah District: Base-Wide Environmental Support Type Services (BEST) Task Order: Innovative Technology Implementation – High Pressure Injection

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Due to the local difficult geological and hydrogeological conditions at this site in Bushnell, Florida, an innovative remedial approach using high pressure injection of bioaugmentation solutions was selected and implemented via 4-inch injection wells in limestone bedrock. Injection wells were installed as open boreholes with carbon steel casing using a sonic drill rig. After the first year of monitoring following the injections, groundwater showed a 50% net reduction in contaminant concentrations. As a result, a second round of injections was authorized and performed. Quarterly and semi-annual sampling is performed to gauge remedial progress.

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