Sampling of the well by the DEP and Range Resources in June 2011 found dissolved methane gas, chloroform, butyl alcohol, acetone and high levels of sodium and total dissolved solids.
From the post-gazette.com
The fuel, butyl alcohol, or butanol, is worth more to refiners because it has more energy than ethanol, is easier to handle and more of it can be blended into each gallon of gasoline.
From the nytimes.com
However the EPA reported finding in those monitoring wells isopropanol, diethylene glycol, triethylene glycol, tert-butyl alcohol, benzene, toluene, ethylbenzene, xylenes, and trimethylbenzenes.
From the forbes.com
Silicon is much like butyl caulk and can be very difficult to deal with requiring a solvent such as alcohol for cleanup.