Greene, Earl A.

• Aquifer tests and water-quality analyses of the Arikaree Formation near Pine Ridge, South Dakota
• Ground-water vulnerability to nitrate contamination at multiple thresholds in the Mid-Atlantic Region using spatial probability models
• Hydrogeologic characterization of the Minnelusa and Madison aquifers near Spearfish, South Dakota
• Hydrogeologic controls on ground-water discharge to the Washington METRO subway tunnel near the Medical Center Station and Crossover, Montgomery County, Maryland