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RETROSPECTIVE PERFORMANCE EVALUATION ON IN SITU BIOREMEDIATION: SITE CHARACTERIZATION
Citation:
Wilson, J. AND D. Kampbell. RETROSPECTIVE PERFORMANCE EVALUATION ON IN SITU BIOREMEDIATION: SITE CHARACTERIZATION. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-93/173 (NTIS PB93221919).
Description:
Performance of in situ bioremediation was demonstrated at a shallow water site with subsurface contamination of used crankcase oil, diesel fuel, gasoline, and other oily phase products. reatment involved ground water amendment by hydrogen peroxide and nutrients by a recharge gallery. he system was operated for 21/2 years. uring treatment benzene and total BTEX concentrations in ground water were reduced in magnitude exceeding ten and twenty times, respectively. ertical profile core samples showed a two feet thick interval near the water table containing significant amounts of hydrocarbons. he center of the interval had not been depleted of BTEX compounds, but the surrounding cortex had been physically and biologically weathered. he interval material was fine textured, that restricted flow of remedial fluids which resulted in little opportunity for bioremediation.