Lisa Molofsky and several colleagues at GSI have published New Recommendations for Sampling Methane in Water Supply Wells

GSI has published a new study evaluating the most effective methods for sampling water supply wells at oil and gas development sites. Proper sampling and testing of baseline conditions prior to drilling or hydraulic fracturing can be critical for later distinguishing natural variations in water quality from actual groundwater impacts.

Under funding from the US Department of Energy, GSI evaluated the data scatter introduced by various sampling methods, including well purging prior to sample collection, the location of the sample port, and natural variations over time. The study found that some baseline sampling practices commonly offer no advantage (e.g., purging large volumes of water prior to sampling) or did not significantly affect test results (sampling before vs. after the pressure tank), and that, over time, methane in groundwater could naturally vary up to a factor of two in concentration.

https://www.sciencedirect.com/science/article/pii/S0048969717324178

For questions about the publication, please contact Lisa Molofsky at This email address is being protected from spambots. You need JavaScript enabled to view it. or Steve Richardson at This email address is being protected from spambots. You need JavaScript enabled to view it..