[[Pro Publica]] has provided two charts, depicting how the "hydro-fracking" (also called hydrofracking or fracking) process works. "What is Hydraulic Fracturing?" can be seen at: http://www.propublica.org/special/hydraulic-fracturing-national and "Anatomy of a Gas Well can be seen at: http://www.propublica.org/feature/anatomy-of-a-gas-well-426. Although no complete list of the cocktail of chemicals used in this process exists, information obtained from environmental clean-up sites demonstrates that known toxins are routinely being used, including hydrochloric acid, diesel fuel (which contains benzene, tuolene, and xylene) as well as formaldehyde, polyacrylimides, arsenic, and chromates.<ref>[http://www.reuters.com/article/idUSN2212071120091223] "Q+A: Environmental fears over U.S. shale gas drilling," Reuters, Dec. 23, 2009.</ref><ref>Weston Wilson, [http://latimes.image2.trb.com/lanews/media/acrobat/2004-10/14647025.pdf Letter to Senators Allard and Campbell and Representative DeGette], October 8, 2004. This letter, from a U.S. [[Environmental Protection Agency]] Employee, describes how the [[Bush Administration]]'s EPA produced a scientifically unsupportable conclusion that hydrofracking should not be regulated under the Clean Water Drinking Act.</ref> These chemicals include known carcinogens and other hazardous substances.<ref>[http://www1.voanews.com/english/news/environment/Gas-Drilling-Plan-Raises-Water-Contamination-Fears-in-New-York-City-80075172.html "Gas Drilling Plan Raises Water Contamination Fears in New York City"], Voice of America News, Carolyn Weaver, December 24, 2009</ref>
{{#evp:youtube|TEtgvwllNpg|What Is in Fracking Fluid|right|210}}[[Pro Publica]] reporter Abrahm Lustgarten revealed that as much as 85% of the fluids used during hydrofracking fracking is regularly left underground after wells are drilled in the Marcellus Shale. Translation: "[Over] three million gallons of chemically tainted wastewater could be left in the ground forever. Drilling companies say that chemical make up less than 1% of that fluid...[which] still amount[s] to 34,000 gallons in a typical well." The old school of thought was that only roughly 30% of the fluids stayed in the ground, which has proven false.<ref>[http://www.politico.com/news/stories/1209/30978.html], "New gas wells leave more chemicals in ground," Abrahm Lustgarten, Politico.com, December 27, 2009</ref> Toxics Targeting created a video in which they show what they have coined "ignitible water." The video can be seen at leftright. <ref>[http://www.toxicstargeting.com/MarcellusShale/videos/ignitable_drinking_water], "Ignitible Drinking Water From a Well in Candor, New York, Located Above the Marcellus Shale Formation."</ref>
Another video of ignitible water can be seen here: http://vimeo.com/4680635