EPA's Study of Hydraulic Fracturing and Its Potential Impact on Drinking Water Resources

The Origin of Some Natural Gases in Permian Through Devonian Age Systems in the Appalachian Basin and the Relationship to Incidents of Stray Gas Migration, February 24, 2011

Hydraulic Fracturing Technical Workshop 1 - presentation by Fred Baldassare, Senior Geoscientist for Echelon Applied Geoscience Consulting, on incidents of stray gas migration.

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The Origin of Some Natural Gases in Permian Through Devonian Age Systems in the Appalachian Basin and the Relationship to Incidents of Stray Gas Migration, February 24, 2011 (PDF)(28 pp, 2 MB)