Effects on Ground-water Quality of Seepage from a Phosphatic Clayey Waste Settling Pond, North-central Florida |
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active settling pond aquifer test Ardaman and Associates base feet brown CaCO3 calcium bicarbonate chemical character clayey sands contamination dissolved dissolved-solids concentration dolomitic limestone erable FEET BELOW LAND Floridan aquifer system geologic unit gradient gray ground water ground-water quality Hamilton County Hawthorn confining unit Hawthorn Formation hydraulic conductivity Hydro Hydrogeologic unit inactive settling pond interbedded land surface layers liter unless otherwise major chemical constituents mg/L Miller and Sutcliffe milligrams per liter minor chemical Miocene nitrogen number 9 Oligocene Open hole Osceola National Forest perimeter ditch water phosphate Post-Miocene sampling depths sandy seepage settling pond number settling pond water silt silty similar sinkhole specific conductance study area sulfate surface water Suwannee Limestone Suwannee River Suwannee River plant Swift Creek Tertiary thickness total recoverable trace metals U.S. Environmental Protection U.S. Geological Survey upper surficial aquifer water for minor water levels water quality water table White Springs complex µS/cm