Evaluation of Biomonitoring Systems for Assessment of Contaminated Water and Sediments at U.S. Army Installations - Aquatic Toxicity Evaluation of Selected Sites During High Surficial Aquifer Flow at J-Field Aberdeen Proving Ground - Edgewood Area.
1998
Burton, Dennis T. | Turley, Steven D.
The surficial aquifer in the vicinity a the toxic burning pits (TBP) at J-Field, Aberdeen Proving Ground, Maryland, is contaminated with a number of chlorinated aliphatic hydrocarbons. The steepest hydraulic gradient in the TBP area is to the southeast toward a marsh. Recharge of the aquifer appears to be greatest in the winter and least in the summer. Flow reversals may take place in the summer. Toxicity in the marsh has been previously detected by several studies. The current study was initiated to define potential toxicity to the marsh ecosystem that may occur as a result of changes in the seasonal flow pattern of the contaminated surficial aquifer discharge into the marsh under high and low aquifer flow conditions. The toxicity of the marsh surface waters, marsh surficial sediments, and a highly contaminated surficial aquifer well up-gradient from the TBP marsh under high aquifer flow conditions, were similar to those observed in previous studies. The current study did show, however, that all three media caused malformations in a frog assay which had not previously been reported. Chemical analyses showed that the chemicals of concern were within an order of magnitude or less of those previously reported.
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