Updated Fri, Mar 9, 2012 11:08 am
A state investigation has concluded that a series of a dozen earthquakes in the Youngstown area in northeast Ohio was induced by a deep injection well disposing of wastewater that's a byproduct of hydraulic fracturing.
A preliminary report released by the Ohio Department of Natural Resources on Friday based the conclusion on "a number of coincidental circumstances." Factors included the opening of D&L Energy's well in December 2010, quakes being clustered around the well bore, a fault since identified in the bedrock, and evidence from monitoring.
The state will impose tough new brine disposal regulations as a result.
Future injection into Precambrian rock will be banned and state-of-the-art pressure and volume monitoring will be required. Electronic tracking systems will be required to identify chemicals in the fluids entering the state.