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News Summary: DOE says fracking didn't taint water

The Associated Press

FRACK FINDINGS: A landmark federal study on hydraulic fracturing, or fracking, shows no evidence that chemicals from the natural gas drilling process contaminated drinking water at a western Pennsylvania drilling site.

WATER WAY: researchers found that the chemicals used to free gas trapped deep under the surface stayed thousands of feet below the areas that supply drinking water.

THE DRILL: The study done by the National Energy Technology Laboratory in Pittsburgh marked the first time that a drilling company let government scientists inject special tracers into the fracking fluid and monitor their spread.