{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Paul M Buszka", "hasEmail": "mailto:pmbuszka@usgs.gov"}, "description": "The U.S. Geological Survey (USGS), in cooperation with the Miami Conservancy District, Dayton, Ohio, in 2019 and 2020 investigated concentrations of per- and polyfluoroalkyl substances (PFAS) in groundwater from the Great Miami buried-valley aquifer (GM-BVA) of southwestern Ohio. The 23 wells used for sampling were identified and sampled by the USGS National Water-Quality Assessment Program to assess the occurrence of a variety of inorganic and organic contaminants in the GM-BVA. Data in this release include results from PFAS analysis of quality-control samples, including sequential replicate samples of groundwater, equipment blanks and source-solution blanks prepared before or during groundwater sampling. Wells where quality-control samples were prepared were from parts of the GM-BVA in Champaign, Clark, Miami, Montgomery, and Shelby Counties in the Great Miami River Basin. Quality-control samples were analyzed for PFAS using the same methods as for groundwater samples through different adaptations of the EPA 537.1 method at a contract laboratory using one proprietary adaptation (method 1; Bureau Veritas, Mississauga, Ontario, Canada) and at a different contract laboratory by a slightly different proprietary adaptation (method 2; SGS North America Inc., Orlando, Florida. The groundwater sampling and analyses were done to inform the public and area stakeholders about concentrations of PFAS compounds in the GM-BVA.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9J7H3LB", "description": "Landing page for access to the data", "format": "xml", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.5f6dfa8e82ce38aaa2498407.xml", "format": "xml", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/usgs-5f6dfa8e82ce38aaa2498407", "keyword": ["water sampling", "Clark County", "Shelby County", "per- and polyfluoroalkyl substances", "groundwater quality", "Great Miami River", "Montgomery County", "Miami County", "Champaign County", "Hydrogeology", "United States of America", "USGS:5f6dfa8e82ce38aaa2498407", "Little Miami River", "PFAS", "State of Ohio"], "modified": "2023-03-09T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "theme": ["geospatial"], "title": "Concentrations of per- and polyfluoroalkyl substances in quality-control samples prepared before and during groundwater sampling from the Great Miami buried-valley aquifer, southwestern Ohio, 2019\u201320"}