Figure 4 Groundwater contamination Hazardous w injection wll Coal strip Deicing road sall mine runoff Buried gasoline and solvent tanl Gasoline station Cesspool septic tan Water Waste lagoon pumping wel Accidental Leakag casing r aq Discharge Unconfined freshwate Confined aquifer Confined freshwater aquifer Groundwater flowFigure 4 Groundwater contamination