Methane in Pennsylvania water wells unrelated to Marcellus shale fracturing

12/05/2011
Lisa J. Molofsky John A. Connor Shahla K. Farhat GSI Environmental Inc. Houston Albert S. Wylie Jr. Tom Wagner Cabot Oil & Gas Corp. Pittsburgh Results from more than 1,700 water wells sampled and tested prior to proposed gas drilling in Susquehanna County, Pa., show methane to be ubiquitous in shallow groundwater, with a clear correlation of methane concentrations with surface topography. Specifically, water wells located in lowland valley areas exhibit significantly higher dissolved methane levels than water wells in upland areas, with no relation to proximity of existing gas wells. The correlation of methane concentrations with elevation indicates that, on a regional level, elevate...
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