Report of a review of the hydraulic fracturing program in Arkansas. Conducted by the State Review of Oil and Natural Gas Environmental Regulations, Inc. (STRONGER) over the period of November 2011- January 2012. Reviewed the program with the 2010 Hydraulic Fracturing Guidelines.
Highlights •No evidence for shallow groundwater contamination in Fayetteville Shale, Arkansas. •Methane in groundwater is low and likely associated with shallow aquifer processes. •No relationship between methane and salinity in groundwater and shale-gas wells. •δ13CCH4 and δ13CDIC suggest biogenic origin for dissolved methane. •Water- aquifer rock interaction controls majority of water chemistry.