In 2010 the US Environmental Protection Agency (EPA) received a complaint from a local landowner that natural gas appeared in his water well after Range Production Company began producing gas from two horizontal wells completed in the Barnett Formation. Several months later the EPA issued an Emergency Administrative Order, concluding Range caused or contributed to the presence of methane and benzene in two water wells. However, the areal distribution of dissolved biodegraded gas and microbial gas supports the conclusion derived from independent geological, geochemical, and petroleum engineering data that Strawn gas sands (not the Range gas wells) are the source of the natural gas dissolved in the Trinity Aquifer in this area: e.g., natural gas commonly occurs in local water wells.


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