Changes

===Water Use for Hydraulic Fracturing===

===Water Use for Hydraulic Fracturing===

* Comparison of Water Use for Hydraulic Fracturing for Unconventional Oil and Gas versus Conventional Oil, B.R. Scanlon and others, 2014, Environ. Sci. Technol.  

* Comparison of Water Use for Hydraulic Fracturing for Unconventional Oil and Gas versus Conventional Oil, B.R. Scanlon and others, 2014, Environ. Sci. Technol.  

Methane in Aquifers:

===Methane in Aquifers:===

* EPA draft assessment of the potential impacts of oil and gas hydraulic fracturing activities on the quality and quantity of drinking water resources in the United States released in June 2015. Read executive summary or full report.   

* EPA draft assessment of the potential impacts of oil and gas hydraulic fracturing activities on the quality and quantity of drinking water resources in the United States released in June 2015. Read executive summary or full report.   

* Science Advisory Board Hydraulic Fracturing Research Advisory Panel has released two preliminary reports as part of its public meetings and peer review.  

* Science Advisory Board Hydraulic Fracturing Research Advisory Panel has released two preliminary reports as part of its public meetings and peer review.  

* A geochemical context for stray gas investigations in the northern Appalachian Basin: Implications of analyses of natural gases from Neogene-through Devonian-age strata, Fred J. Baldassare, AAPG Bull. V. 98, No. 2 (February 2014), P. 341–372. Thermogenic and microbial gases occur in shallow aquifers and formations above the Marcellus, and predate Marcellus drilling.

* A geochemical context for stray gas investigations in the northern Appalachian Basin: Implications of analyses of natural gases from Neogene-through Devonian-age strata, Fred J. Baldassare, AAPG Bull. V. 98, No. 2 (February 2014), P. 341–372. Thermogenic and microbial gases occur in shallow aquifers and formations above the Marcellus, and predate Marcellus drilling.

===Methane Air Emissions: there is significant variation in measured, estimated or modeled values:===

===Methane Air Emissions: there is significant variation in measured, estimated or modeled values:===

* National Energy Technology Lab: Life Cycle Greenhouse Gas Emissions: Natural Gas and Power Production presentation to EIA June 2015 Energy Conference, http://www.netl.doe.gov/research/energy-analysis/life-cycle-analysis/lca-listing?prog=presentation.   

* National Energy Technology Lab: Life Cycle Greenhouse Gas Emissions: Natural Gas and Power Production presentation to EIA June 2015 Energy Conference, http://www.netl.doe.gov/research/energy-analysis/life-cycle-analysis/lca-listing?prog=presentation.