“We have not seen whether the fracturing itself is causing the microseismic activity. More work needs to be done.”
Read more: http://www.foxnews.com/scitech/2012/02/20/frackings-effects-on-groundwater-may-be-overblown-study-shows/#ixzz1mwTxf2d3
A University of Texas study has found no evidence that fracking — hydraulic fracturing of shale to extract natural gas — is contaminating groundwater.
Problems associated with the process have been reported in water, but they appear to occur at ground level or just below the surface, according to the study released Friday. Many are common to any natural-gas extraction process, or are the result of mishandling of wastewater, the researchers said.
“The bottom line was, in the areas we investigated … we found no direct evidence that hydraulic fracturing itself was contaminating groundwater,” said Charles Groat, professor of geology at the University of Texas at Austin…