Does an Old EPA Fracking Study Provide Proof of Contamination?

Does an Old EPA Fracking Study Provide Proof of Contamination? by Abrahm Lustgarten ProPublica, August 4, 2011.
But the language found in the EPA report made public Wednesday is the strongest articulation yet by federal officials that there is a direct causal connection between man-made fissures thousands of feet underground and contaminants found in well water gone bad.