The U.S. Environmental Protection Agency is taking more water samples in the area of a Wyoming gas field where it says hydraulic fracturing may have caused groundwater pollution. The company operating in the Pavillion gas field is skeptical of the new testing. Encana spokesman Doug Hock says a third-party analysis raises questions about how the EPA went about drilling two wells used to collect groundwater samples. Contamination in those wells led to last year's theory. Now, those same wells are being tested again. Pavillion residents say the EPA also has resumed testing their well water. Previous testing of the monitoring wells found high levels of the carcinogen benzene. The EPA announced last month it would collaborate on new testing with the U.S. Geological Survey, Wyoming and two American Indian tribes.
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