"Two out of every three times oil and gas companies have publicly disclosed the chemicals in their hydraulic fracturing fluid, they've left something out."

"At least one chemical was kept secret in 65 percent of fracking disclosures by companies that said they needed to protect confidential business information, according to a review of PIVOT Upstream Group's D-Frac database done for EnergyWire.

Critics of drilling say the widespread use of such 'trade secret' exemptions undermines the industry's assurances that drillers are being open with the communities where they are 'fracking' wells and producing oil and gas."

Mike Soraghan reports for EnergyWire September 26, 2012. [2]