Water-Quality Data Associated with Uranium Background Concentrations at the Homestake Superfund Site near Milan, New Mexico: Data Collected August 2016 through October 2016

The data set contained herein were collected as part of a cooperative U.S. Geological Survey and U.S. Environmental Protection Agency (EPA) project entitled "Field Investigations to Help Support the Assessment of Background Concentrations for Uranium (U) at the Homestake Mining Company, Superfund Site near Milan, New Mexico, July 2016." Groundwater samples were collected from pre-selected wells and analyzed for metals, alkalinity, ammonia, common ions, nitrogen, gross alpha/beta, radium isotopes, radon-22, uranium isotopes, stable isotopes, sulfur isotopes, nitrogen isotopes, helium 4, dissolved gases, tritium/helium 3, and chlorofluorocarbons. Groundwater samples were collected using micro-purge, volumetric, and passive samplers. The uranium results are still pending and will be added to this data release when they become available. Five different laboratories analyzed the samples; separate datasets containing the results from each laboratory are provided in this data release.