Contract Laboratory Results from Field Samples near Hinkley, California

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. The cooperator for this study is the Lahontan Regional Water Quality Control Board.

Data and Resources

Field Value
accessLevel public
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datagov_dedupe_retained 20220721212438
identifier USGS:5b75914fe4b0f5d5787fe4f2
metadata_type geospatial
modified 20200929
old-spatial {"type": "Polygon", "coordinates": [[[-117.6202, 34.3425], [-117.6202, 34.9972], [ -117.1071, 34.9972], [ -117.1071, 34.3425], [-117.6202, 34.3425]]]}
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash fe241422a4f6c742d870159067f2f3ed0302867e
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spatial {"type": "Polygon", "coordinates": [[[-117.6202, 34.3425], [-117.6202, 34.9972], [ -117.1071, 34.9972], [ -117.1071, 34.3425], [-117.6202, 34.3425]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • atomic-emission-spectroscopy
  • background-level
  • california
  • chemical-analysis
  • chromium
  • ckan
  • contamination-and-pollution
  • geo
  • geochemistry
  • geoscientificinformation
  • geoss
  • groundwater
  • health
  • hinkley
  • mass-spectroscopy
  • national
  • north-america
  • rocks-and-deposits
  • scanning-electron-microscopy
  • soil-chemistry
  • unconsolidated-deposits
  • united-states
  • usgs-5b75914fe4b0f5d5787fe4f2
  • x-ray-fluorescence
isopen False
license_id notspecified
license_title License not specified
maintainer Jean M. Morrison
maintainer_email jmorrison@usgs.gov
metadata_created 2025-11-22T22:15:32.272537
metadata_modified 2025-11-22T22:15:32.272541
notes 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. The cooperator for this study is the Lahontan Regional Water Quality Control Board.
num_resources 2
num_tags 26
title Contract Laboratory Results from Field Samples near Hinkley, California