{"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, and (4) MDN System-Blank 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/P9B119QP", "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.60d4dbbbd34e12a1b00d0368.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_60d4dbbbd34e12a1b00d0368", "keyword": ["National Atmospheric Deposition Program, quality assurance, quality control, Hydrologic Networks Branch, wet deposition, National Trends Network, Mercury Deposition Network", "USGS:60d4dbbbd34e12a1b00d0368", "atmospheric sciences", "chemical analysis"], "modified": "2022-02-03T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-168.3105, 12.6828, -50.5371, 71.2301", "theme": ["geospatial"], "title": "U.S. Geological Survey Precipitation Chemistry Quality Assurance Project Data 2019 \u2013 2020"}