The Massachusetts firm The Cadmus Group was hired by the EPA under the George W. Bush Administration in 2002 to write its study on fracking. That study would go on to conclude that fracking poses no risk to drinking water. That finding was the basis for the Halliburton loopole in the Energy Policy Act, which exempted fracking from regulation under the Safe Drinking Water Act.
The study faced obstacles from the outset, according to EPA documents and Cadmus staff, who ultimately disagreed with the conclusion imposed by the Bush EPA and asked to have their names removed from the document.
A March 3, 2004, EPA agenda entitled "Hydraulic Fracturing Project Status" listed among the tasks "Soften conclusions and ES [Executive Summary]."