||Field-scale application of in-situ cosolvent flushing : evaluation approach /
Rao, P. S. C. ;
Annable, M. D. ;
Sillan, R. K. ;
Hatfield, K. ;
Graham, W. D.
||National Risk Management Research Lab., Ada, OK. ;Florida Univ., Gainesville.;Strategic Environmental Research and Development Program, Arlington, VA.
|| U.S. Environmental Protection Agency, National Risk Management Laboratory,
Water pollution control ;
Ground water ;
Nonaquoues solvents ;
Jet fuels ;
Water treatment ;
Ecological concentration ;
Tracer studies ;
NAPL(Nonaqueous Phase Liquids) ;
Nonaqueous Phase Liquids ;
Hill Air Force Base ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||12 pages : illustrations ; 28 cm.
The use of in-situ cosolvent flushing was evaluated at a field site located at Hill AFB, Utah. The experiment was conducted in a hydralically-isolated test cell (4.3 m x 3.4 m) constructed in a surficial sand-gravel-cobble aquifer, which was contaminated with a mixture of jet fuel and chlorinated solvents. A series of tests was conducted in the test cell to evaluate the effectiveness of cosolvent flushing using the following methods: (1) NAPL constituent concentrations measured by extraction and analysis of pre- and post-flushing soil core samples; (2) Cumulative mass of several target contaminants removed, as determined by analysis of the extraction well fluids; (3) Analysis of the data from pre- and post-flushing inter-well partitioning tracers tests; and (4) Pre- and post-flushing analysis of groundwater samples for target contaminant concentrations. The results obtained by the various methods agree, and indicate that > 90% mass of several target contaminants and > 75% of the total NAPL mass present in the test cell was removed as a result of the cosolvent flushing.
Caption title. "Mar. 1991." Includes bibliographical references. "EPA/600/A-98/035." Microfiche.