Weston Wilson. Letter written to Senators Allard and Campbell and Representative DeGette. Denver, Colorado. October 8th, 2004. The U.S. Environmental Protection Agency was criticized by Wilson and others for this Fracking Study which led to the "Halliburton Loophole" of 2005. See New York Times Editorial on Halliburton Loophole. See also the Energy Policy Act of 2005.