Affiliation: | US Environmental Protection Agency, NRMRL, Isotope Hydrology Laboratory, Center Hill Facility, 5995 Center Hill Ave., Cincinnati, OH 45224, USA, Groundwater Research Co., Box 23, Rt 2. Waldoboro, ME 04572, USA, Atlantic Center for the Environment, Medomak Valley Land Trust, P.O. Box 180, Waldoboro, ME 04572, USA,
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