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    • Electrical resistivity tomography, electromagnetic induction, and ultraviolet optical scanning tool data collected at Malmstrom Air Force Base, Great Falls, Montana, August 28–August 31, 2023

    Metadata Updated: January 21, 2026

    The U.S. Geological Survey (USGS), in cooperation with the U.S. Air Force Civil Engineer Center (USAF/CEC), conducted a pilot study at Malmstrom Air Force Base (MAFB) to evaluate the utility of two non-invasive geophysical techniques for detecting hydrocarbon contamination in subsurface materials. Electrical resistivity tomography (ERT) and electromagnetic induction (EMI) surveys were completed August 28–29, 2023, along 7 transects overtop known contaminated and uncontaminated sites for comparison. Additionally, the USGS completed ultraviolet optical scanning tool (UVOST) soundings and collected soil samples from temporary boreholes to validate geophysical survey results. A total of 11 UVOST soundings and 7 boreholes were completed August 28–31, 2023. Two soil samples from various depths were collected from each borehole for a total of 14 samples. Ten quality assurance/quality control samples were collected consisting of 2 field equipment blanks (1 per day), 4 replicate soil samples (2 per day), and 4 trip blanks (2 per day). Soils were tested for volatile organic compounds, semi-volatile organic compounds, gasoline range organics, diesel range organics, metals, and per- and polyfluorinated substances (PFAS/PFOA).

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date January 13, 2026
    Metadata Updated Date January 21, 2026

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 13, 2026
    Metadata Updated Date January 21, 2026
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/USGS_6419e7ddd34eb496d1d29caa
    Data Last Modified 2023-12-21T00:00:00Z
    Category geospatial
    Public Access Level public
    Bureau Code 010:12
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/usgs-data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Datagov Dedupe Retained 20260121130127
    Harvest Object Id 16f587da-bac6-467b-a24e-22424577e014
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": -111.189164, 47.509670, -111.189164, 47.516900, -111.177477, 47.516900, -111.177477, 47.509670, -111.189164, 47.509670}
    Source Datajson Identifier True
    Source Hash fd1182d9db7f68f4e0ec8ab811c58f3939df074db0c8cbe1eea06c669f81423c
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -111.189164, 47.509670, -111.189164, 47.516900, -111.177477, 47.516900, -111.177477, 47.509670, -111.189164, 47.509670}

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