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SURFACTANT ENHANCED EXTRACTION TO EXPEDITE REMEDIATION OF A CARBON TETRACHLORIDE SOURCE ZONE AT AN ACTIVE GRAIN ELEVATOR FACILITY
Dulle, E. and G. Ivey.
RemTech 2017: Remediation Technologies Symposium. Presentation 72, 46 slides, 2017

The site of an active grain elevator in Kansas City, Kansas, was entered into the State's voluntary cleanup program in 2000 following detection of CT in soil and groundwater near the former location of a fumigant aboveground storage tank. After dual-phase vacuum extraction (DPVE) over a 6-yr period removed > 9,000 lb of total VOCs, additional investigations revealed the location of a significant source area combining LNAPL and other contaminants of concern. In 2015 a pilot study of surfactant-enhanced extraction (SEE) was conducted at the site using a gravity-fed solution of 1-2% (by volume) Ivey-sol® 106 biodegradable surfactant. After a prescribed residence time, the surfactant solution, groundwater, and liberated contaminants were extracted using the DPVE system. The SEE pilot achieved CT groundwater concentration reductions of up to 99%. Full-scale SEE implementation is planned.
Longer abstract: http://www.esaa.org/wp-content/uploads/2017/09/RemTech2017Abstracts-72.pdf
Slides: http://www.esaa.org/wp-content/uploads/2017/10/17-Ivey.pdf



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