{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Shaul Hurwitz", "hasEmail": "mailto:shaulh@usgs.gov"}, "description": "Chemistry and Isotope Data  \nSample Collection: \nWater samples were collected from approximately 100 feet (30 meters) below the water table using either a 4 foot or 6 foot long stainless-steel bailers with an inner diameter of 0.5 in. Samples for anion concentration measurements were poured into 60 ml polypropylene bottles through 0.45mm pore-diameter filter. Raw (unfiltered, unpreserved) samples for oxygen-18 and deuterium isotope analyses were stored in 30 ml glass bottles.  \nSample Analyses: \nThe concentrations of sulfate (SO42-), chloride (Cl-), and fluoride (F-) in samples collected until October 2003 were determined with a Dionex DX-300 ion chromatograph, and since October 2003 with a Dionex ICS-2000 ion chromatograph at the U.S. Geological Survey laboratories in Menlo Park, California, with analytical errors better than 3%. Concentrations of fluoride were usually at or below the analytical detection limit. Total alkalinity was determined on stored samples by titrating ten milliliters of sample with 0.05 N sulfuric acid to the bicarbonate end-point. The analytical error in the determined alkalinity concentrations is approximately 5%. Starting in March 2018, alkalinity has been determined in the field using a portable titrator.   \nOxygen-18 and deuterium isotope analyses were stored in 30 ml glass bottles and analyzed at the USGS laboratories in Reston, Virginia. Analysis of oxygen isotopes was according to the methods of Epstein and Mayeda [1953] with a precision of \u00b10.1\u00b0, and the hydrogen isotopes were analyzed according to the method described in Kendall and Coplen [1985] and Coplen et al. [1991] with a precision of \u00b11.5\u00b0.  \nReferences \nCoplen, T. B., J. D. Wildman, and J. Chen, Improvements in the gaseous hydrogen-water equilibration technique for hydrogen isotope ratio analysis, Anal. Chem., 63, 910\u2013 912, 1991. doi:10.1021/ac00009a014. \nEpstein, S., and T. Mayeda, Variation of 18O content of waters from natural sources, Geochim. Cosmochim. Acta, 4, 213\u2013 224, 1953, doi: 10.1016/0016-7037(53)90051-9. \nKendall, C., and T. B. Coplen, Multi sample conversion of water to hydrogen by zinc for stable isotope determination, Anal. Chem., 57, 1437-1440, 1985, doi: 10.1021/ac00284a058. \nDatabase Contents  \nThe data file (KW_chemistry_isotopes.csv) contains the anion concentrations and the water isotope data for water samples from the deep well.  \nThe entries in the data file appear in the following columns:  \nA. Sample name  \nB. Date sample was collected  \nC. Alkalinity (milligrams per liter as bicarbonate)  \nD. Fluoride concentration (milligrams per liter)  \nE. Chloride concentration (milligrams per liter)  \nF. Sulfate concentration (milligrams per liter)  \nH. Hydrogen isotope value (per mil)  \nI. Oxygen isotope value (per mil)", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9UCGT2F", "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.5c927e48e4b0938824575406.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5c927e48e4b0938824575406", "keyword": ["Kilauea volcano", "USGS:5c927e48e4b0938824575406", "water chemistry", "water isotopes"], "modified": "2020-08-27T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-155.286, 19.3928, -155.2858, 19.393", "theme": ["geospatial"], "title": "KW_chemistry_isotopes"}