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3 years ago

In Situ Bioremediation at FracRock Sites

In Situ Bioremediation at FracRock Sites

Implementation• Utilize 4 existing wells-areal extent 9,000 ft 2 up to 115’ bgs• 4 wells form a trapezoid 230 ft on the long side• Estimate 220 lbs TCE in pilot area (up to 16 ppm)• Inject EVO first to retain injected bacteriaSlide 6www.geosyntec.com

Pilot Test Injections– Used the four wells as injection/extractionwell pairs - extracted from one well of thepair while injecting into the other usingflow proportional pump– Pulled water from designated extractionwell to make up 10% stock of EVO– Injected the EVO stock with gw pulledfrom the extraction well to a finalconcentration of ~2%-until EVO visible inthe extraction well– Added 20 L KB-1 culture-DHC bacteria– Injected the remainder of the EVO andflushed the well with at least 1 wellvolume of groundwater withoutamendmentsSlide 7www.geosyntec.com

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