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ETHYLENE DIBROMIDE IN SITU BIODEGRADATION PILOT TEST REPORT
BULK FUELS FACILITY SOLID WASTE MANAGEMENT UNITS ST-106 AND SS-111, KIRTLAND AIR FORCE BASE, NEW MEXICO
U.S. Army Corps of Engineers Omaha District, 247 pp, 2019
A pilot test was conducted at Units ST-106 and SS-111 to investigate potential treatment amendments for anaerobic in situ bioremediation of ethylene dibromide (EDB) at the Bulk Fuels Facility on Kirtland AFB. Using one injection and groundwater circulating, two extraction, and six monitoring wells and the pilot test evaluated baseline conditions followed by biostimulation in the subsurface after distribution of treatment amendments in recirculated groundwater, bioaugmentation, and long-term monitoring. Baseline EDB concentrations ranged from 20.1-432 µg/L in shallow wells; virtually no EDB was detected in intermediate wells suggesting biologically active subsurface. At the pilot conclusion, EDB reductions were >97% in the shallow wells; four wells exhibited a two log reduction (>99%), and two of the wells exhibiting three-log reductions (>99.9%). EDB degradation was evident through comparison with benzene and toluene concentrations, and the production of EDB degradation products ethene, ethane, and bromide suggested that the degradation occurred by reductive debromination. https://www.env.nm.gov/wp-content/uploads/2019/04/KAFB-in-situ-biodegradation-report-April-2019.pdf
A pilot test was conducted at Units ST-106 and SS-111 to investigate potential treatment amendments for anaerobic in situ bioremediation of ethylene dibromide (EDB) at the Bulk Fuels Facility on Kirtland AFB. Using one injection and groundwater circulating, two extraction, and six monitoring wells and the pilot test evaluated baseline conditions followed by biostimulation in the subsurface after distribution of treatment amendments in recirculated groundwater, bioaugmentation, and long-term monitoring. Baseline EDB concentrations ranged from 20.1-432 µg/L in shallow wells; virtually no EDB was detected in intermediate wells suggesting biologically active subsurface. At the pilot conclusion, EDB reductions were >97% in the shallow wells; four wells exhibited a two log reduction (>99%), and two of the wells exhibiting three-log reductions (>99.9%). EDB degradation was evident through comparison with benzene and toluene concentrations, and the production of EDB degradation products ethene, ethane, and bromide suggested that the degradation occurred by reductive debromination. https://www.env.nm.gov/wp-content/uploads/2019/04/KAFB-in-situ-biodegrad
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