Abstract - As the pace of drilling activity in the Marcellus Formation in the northern Appalachian Basin has increased, so has the number of alleged incidents of stray natural gas migration to shallow aquifer systems. For this study, more than 2300 gas and water samples were analyzed for molecular composition and stable isotope compositions of methane and ethane. The samples are from Neogene- to Middle Devonian-age strata in a five-county study area in northeastern Pennsylvania. Samples were collected from the vertical and lateral sections of 234 gas wells during mud gas logging (MGL) programs and 67 private groundwater-supply wells during baseline groundwater-quality testing programs.
Abstract - In 2012, Michigan consumed over 210 billion gallons of water. That may sound like a lot, but according to the Michigan Department of Environmental Quality (DEQ), only five percent of the total water withdrawn from the Great Lakes Basin is consumptive in nature – that is, it’s not returned to the water cycle. The fact is, Michigan is blessed with enormous supplies of fresh water, and according to the U.S. EPA, the Great Lakes account for a staggering 84 percent of the entire nation’s freshwater supply.