In 2006 — according to a ProPublica report — a residential drinking water well in Garfield County, Colo., spewed gas and polluted water into the air after a nearby gas well was hydraulically fractured. Tests detected a chemical called 2-butoxyethanol (2-BE), commonly used in hydraulic fracturing, in the drinking water well. The EPA never studied the case, and Colorado officials did not pursue an in-depth investigation before the gas company reached a multimillion-dollar settlement with the homeowner that included nondisclosure agreements.