Encana on defensive over groundwater fouled by fracking

Encana on defensive over groundwater fouled by fracking by Nathan Vanderklippe, December 8, 2011, The Globe and Mail
Other types of synthetic organic compounds, like tert-butyl alcohol – which is not expected to be found naturally in groundwater – were also discovered. Sampling showed the elevated presence of gasoline, diesel, benzene, toluene, ethylbenzene and xylene. Some of those substances matched with materials used in oil and gas work…. [Emphasis added]