U.S. EPA Contaminated Site Cleanup Information (CLU-IN)

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Christenson, M., J. Reece, A. Kambhu, Y. Li, C. Harris, and S. Comfort.
26th International Petroleum Environmental Conference, 7-9 October, San Antonio, TX, 42 slides, 2019

An aerated, slow-release oxidant delivery system (oxidant candle) was installed by direct-push equipment to remediate TCE or BTEX at three sites in Nebraska. The system continuously bubbles air beneath oxidant candles in situ to facilitate oxidant spreading as the candle slowly dissolves. The aeration rate controls the outward flow of oxidant from the outer screen in all directions and the radius of influence around each drive point is largely a function of the outward velocity of the oxidant exiting the screen and the advection rate opposing the upgradient and lateral spreading of the oxidant. Field results from the three sites show downgradient contaminant concentrations typically decrease 50-99% within 6-9 months after installation. More information on the Cozad Landfill using Oxidant Candles:

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