This is Ligonier's friendly neighborhood blog and an attempt to recapture our lively opinionated debates in a free speech zone.

Please join our conversations. Contributors welcome.


claysh@gmail.com

Saturday, July 20, 2013

scientists put markers in fracking fluid to see where it goes

The study, done by the National Energy Technology Laboratory in Pittsburgh, marked the first time that a drilling company let government scientists inject special tracers into the fracking fluid and then continue regular monitoring to see whether it spread toward drinking water sources. The research is being done at a drilling site in Greene County, which is southwest of Pittsburgh and adjacent to West Virginia.
Eight new Marcellus Shale horizontal wells were monitored seismically and one was injected with four different man-made tracers at different stages of the fracking process, which involves setting off small explosions to break the rock apart. The scientists also monitored a separate series of older gas wells that are about 3,000 feet above the Marcellus to see if the fracking fluid reached up to them.
The industry and many state and federal regulators have long contended that fracking itself won't contaminate surface drinking water because of the extreme depth of the gas wells. Most are more than a mile underground, while drinking water aquifers are usually within 500 to 1000 feet of the surface.