A study published in the Proceedings of the National Academy of Sciences, examining eight clusters of contaminated water wells in Pennsylvania and Texas, found that the wells’ contamination was either from naturally occurring gas deposits — i.e., the gas is naturally occurring within the aquifer — or from poor casing and cementing of nearby gas wells. The study concluded that the hydraulic fracturing of the wells was not a cause of groundwater contamination. The study was led by a researcher at The Ohio State University and included researchers at Duke, Harvard, Dartmouth and the University of Rochester. The researchers were able to “fingerprint” the gas by measuring the amount of “noble” gases such as helium included with the natural gas. The researchers were able to distinguish between the fingerprints of naturally occurring methane in the aquifers and gas from the Barnett and Marcellus Shale formations. Ohio State’s press release about the study can be viewed here.
I have written previously about the ongoing battle between Range Resources and the Lipskys over the Lipskys’ claims that Range’s wells contaminated their groundwater. A facet of that battle is pending in the Texas Supreme Court. This new study will add fire to the debate.