{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Gregory A. Wetherbee", "hasEmail": "mailto:wetherbe@usgs.gov"}, "description": "The USGS Precipitation Chemistry Quality Assurance Project (PCQA) operates QA programs to challenge and test the National Atmospheric Deposition Program (NADP) data-collection processes for both the National Trends Network (NTN) and Mercury Deposition Network (MDN).  PCQA data are available in separate tables for each quality-assurance program:  (1) NTN Interlaboratory-comparison, (2) MDN Interlaboratory-comparison program, (3) NTN Field-Audit program, (4) MDN System-Blank program, and (5) NTN Co-located Sampler program.  Measured parameters include precipitation depth, pH, specific conductance, and ion concentrations for calcium, magnesium, sodium, potassium, ammonium, chloride, bromide, nitrate, sulfate, phosphate, and total mercury.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9ZKXD8N", "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.5d4350a1e4b01d82ce8db2cd.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5d4350a1e4b01d82ce8db2cd", "keyword": ["USGS:5d4350a1e4b01d82ce8db2cd", "atmospheric sciences", "chemical analysis"], "modified": "2020-08-26T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-168.31054687189, 12.682788057678, -50.537109376591, 71.230079739726", "theme": ["geospatial"], "title": "U.S. Geological Survey Precipitation Chemistry Quality Assurance Project Data 2017 \u2013 2018"}