Toxicity Evaluation of Contaminated Groundwater at Aberdeen Proving Ground-Edgewood Area West Branch of Canal Creek Phase 1: Groundwater Evaluation

摘要

Contaminated groundwater, which contained multiple heavy metals and chlorinatedaliphatic hydrocarbons, from the Canal Creek aquifer (well CC-27B) of the U.S. Army Aberdeen Proving Ground-Edgewood Area, Aberdeen, Maryland, was evaluated for toxicity to aquatic organisms. Toxicity was detected at various groundwater concentrations by 6 of 8 biomonitoring systems. The lowest concentration of groundwater that caused no observable adverse effect (NOEC) at pH 4 was 10% ground water by volume in: 4-d green alga (Selenastrum capricornutum) growth test; 7-d cladocaran (Ceriodapnia dubia) survival and reproduction test; and 96-h