Impacts , s in groundwater chemistry in landscapes with more than 100 years of oil and gas development †

Earth and Environmental Systems Institute, Park, PA 16802, USA. E-mail: sxb7@psu.edu Department of Statistics, Pennsylvania Sta USA. E-mail: lzxue@psu.edu Department of Geosciences, Pennsylvania St USA College of Information Sciences and Tec University Park, Pennsylvania 16802, USA † Electronic supplementary informa 10.1039/c8em00385h ‡ These authors contributed equally to th Cite this: Environ. Sci.: Processes Impacts, 2019, 21, 384