See more from this Division: Joint Sessions
See more from this Session: Organic Contaminants in Water, Soil and Sediments: Sources, Interactions and Ecological Impacts I
Abstract:
Nineteen pesticide and degradate compounds were found in at least one pit surface-water sample. Nine of these compounds and two other pesticides were detected in water from at least one monitoring well. Six organic contaminants other than pesticides were detected in at least one pit water and two of these were found in well waters. None of these chemicals exceeded the maximum contaminant levels (MCL) for drinking waters. An additional 17 organic contaminant compounds were detected in at least one well water; eleven of these occurred at only one site and probably derived from contamination directly impacting ground water by migration through the unsaturated zone. Only one well water had an inorganic constituent (arsenic) that exceeded the MCL. Persistent pesticides and PCBs were found in the bottom sediment of two pits. The concentration distributions of pesticides and other organics at most of the study sites, as well as the general pattern in iron, manganese, and ammonium ion concentrations in downgradient well waters relative to upgradient well and pit waters, indicate that ground-water quality at the sites is impacted by contaminants in the pit surface waters.
See more from this Division: Joint Sessions
See more from this Session: Organic Contaminants in Water, Soil and Sediments: Sources, Interactions and Ecological Impacts I