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New Publication: Valder, J.F., Carter, J.M., Robinson, S.M., Laveau, C.D., and Petersen, J.A., 2018, Quality-assurance plan for groundwater activities, @USGS_DWSC: U.S. Geological Survey Open-File Report 2018–1103, 28 p., https://t.co/eBAQESMMdu.