I have to defer to the EPA on this. See:
In the meantime, be wary of the anti-fracking propaganda. The real action is with the new head of the DOI, Sally Jewell. Jewell (who was celebrated by enviros) is aggressively seeking to expand fracking and oil drilling on public, park, and conservation lands. She is an Obama pick, and former CEO of REI. She used to frack wells and is, in my view, one of the most dangerous leaders in the current administration.
On April 12, 2013, Sally Jewell was sworn in as the 51st Secretary of the Interior.
In nominating Jewell, President Obama said, “She is an expert on the energy and climate issues that are going to shape our future. She is committed to building our nation-to-nation relationship with Indian Country. She knows the link between conservation and good jobs. She knows that there’s no contradiction between being good stewards of the land and our economic progress; that in fact, those two things need to go hand in hand.”
As Secretary of the Interior, Jewell leads an agency with more than 70,000 employees. Interior serves as steward for approximately 20 percent of the nation’s lands, including national parks, national wildlife refuges, and other public lands; oversees the responsible development of conventional and renewable energy supplies on public lands and waters; is the largest supplier and manager of water in the 17 Western states; and upholds trust responsibilities to the 566 federally recognized American Indian tribes and Alaska Natives.
Prior to her confirmation, Jewell served in the private sector, most recently as President and Chief Executive Officer of Recreation Equipment, Inc. (REI).