{
  "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": [
    "Champaign County",
    "Clark County",
    "Great Miami River",
    "Little Miami River",
    "Miami County",
    "Montgomery County",
    "PFAS",
    "Shelby County",
    "State of Ohio",
    "USGS:5f6dfa8e82ce38aaa2498407",
    "United States of America",
    "groundwater quality",
    "hydrogeology",
    "per- and polyfluoroalkyl substances",
    "water sampling"
  ],
  "modified": "2023-03-09T00:00:00Z",
  "publisher": {
    "@type": "org:Organization",
    "name": "U.S. Geological Survey"
  },
  "spatial": "-84.8000, 39.2500, -83.6900, 40.2100",
  "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, 2019–20"
}