A process of extracting natural gas from deep well drilling is raising huge concerns among environmental and health protection groups for its use of highly toxic, cancer causing chemicals.
Hydraulic fracturing or fracking is a means of natural gas extraction employed in deep natural gas well drilling. Once a well is drilled, millions of gallons of water, sand and proprietary chemicals are injected, under high pressure, into a well. The pressure fractures the shale and props open fissures that enable natural gas to flow more freely out of the well. This process uses toxic chemicals that are known to cause cancer, and very small quantities of some fracking chemicals are capable of contaminating millions of gallons of water.
The Environmental Working Group says that petroleum-based products known as petroleum distillates such as kerosene (also known as hydrotreated light distillates, mineral spirits, and a petroleum distillate blends) are likely to contain benzene, a known human carcinogen that is toxic in water at levels greater than five parts per billion (or 0.005 parts per million).
For more information on fracking, and the health concerns it is raising, visit Hydraulic Fracturing 101. The issue is also raising big worries in Canada. Read the December 19 story by Andrew Nikiforuk, in The Tyee, Fracking Contamination 'Will Get Worse': Alberta Expert.