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Contract laboratory results

Contract Laboratory Results from Field Samples near Hinkley, California


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Morrison, J.M., Benzel, W.M., Holm-Denoma, C.S., and Bala, S., 2018, Grain size, mineralogic, and trace-element data from field samples near Hinkley, California: U.S. Geological Survey data release,


Samples were submitted for contract laboratory analysis as part of a study examining the occurrence of chromium and natural and anthropogenic hexavalent Chromium, Cr(VI) in groundwater. Data will be used to estimate naturally-occurring background Cr(VI) concentrations upgradient, near the plume margins, and downgradient from a mapped Cr(VI) contamination plume near Hinkley, CA (Izbicki and Groover, 2016). These Contract Lab results are part of the data release including grain-size distribution, photographic and associated chemical and mineral analysis data for 36 sediment core and alluvium samples as well as Scanning Electron Microscopy analysis on select grains from magnetic and heavy mineral separates collected near Hinkley, CA. [...]


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Hinkley_Contract_Lab_Results_LT2mm_All_Samples_Results.csv 71.31 KB text/csv
DataDictionary_Hinkley_Contract_Lab_Results.csv 50.46 KB text/csv


Data were collected to determine the source of several elements of interest, particularly chromium and arsenic in alluvium and core material from wells collected from the Hinkley area.

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