Fracking used more diesel fuel than estimated, lawmakers say
Three U.S. House members investigating the use of toxic substances in the fluids injected into natural gas wells have revised their estimate of the amount of diesel fuel used in the practice, known as hydraulic fracturing or "fracking."
Rep. Henry Waxman of Los Angeles, the ranking Democrat on the House Energy and Commerce Committee, joined Edward J. Markey (D-Mass.) and Diana DeGette (D-Colo.) in sending a letter to the Environmental Protection Agency. The letter said two companies had erroneously reported usage of diesel fuel in fracking fluids, which are injected at high pressure into rock formations — usually shale — to create fissures that allow natural gas to be extracted.
More than 32 million gallons of diesel were used from 2005 to 2009 by 12 companies employing fracking in states including Texas, Oklahoma, Louisiana, Colorado, Wyoming, North Dakota, West Virginia and Pennsylvania, among others.
Oil service companies such as Halliburton have maintained that fracking does not affect drinking water, despite anecdotal evidence in places such as Wyoming that show methane and other chemicals in residential wells near fracking activities.
The amount of diesel under-reported was about 500,000 gallons, the lawmakers said in their letter to the EPA, which pressed the agency for better oversight and more uniform reporting requirements.
-- Geoff Mohan
Photo: A natural gas well pad near Rifle, Colo., in the Rocky Mountains. Credit: David Zalubowski / Associated Press