OCCURRENCE AND DISTRIBUTION OF MERCURY IN MAMMOTH CAVE NATIONAL PARK
The current data shows a potential threat of Hg levels in the drinking water and Hg bioaccumulation in a number of surface and subsurface organisms of MCNP. Background levels of mercury, 0-25 ppt in the water and 0-3000 ppb in the sediment have been observed. Hg concentrations in aquatic organisms at the park are 0-0.50 ppm. Mercury transport in ground water and surface water at in Mammoth Cave National will be determined. Results will be complemented by an investigation of the extent of bioaccumulation of mercury in fish and mussels. The correlation of the levels and distribution of mercury in fish and mussels with levels of mercury measured in the atmosphere, water and sediments will be examined. The physical and geochemical processes that govern the fate and transport of mercury in a karstic aquifer system will be determined through a series of batch and column studies.