Watershed-Scale Impacts from Surface Water Disposal of Oil and Gas Wastewater in Western Pennsylvania.William D Burgos, Luis Castillo-Meza, +8 authors Nathaniel R WarnerEnvironmental science & technology2017Combining horizontal drilling with high volume hydraulic fracturing has increased extraction of hydrocarbons from low-permeability oil and gas (O&G) formations across the United States; accompanied… (More)