Groundwater, surface water, bed sediment, soil, benthic macroinvertebrate taxa, habitat, and biological indices data collected near and at the Open Burning/Open Detonation (OB/OD) Areas at the Letterkenny Army Depot, Chambersburg, Pennsylvania, (ver. 3.0, September 2025)

Groundwater, surface water, sediment and soil sampling was conducted by the U.S. Geological Survey (USGS) at nine groundwater wells, eight surface water sites, three bed sediment retention ponds, and two fields, respectively at areas near and within the Open Burning/Open Detonation (OB/OD) areas in the Ammunition Area (AA) of Letterkenny Army Depot. Analytical results for groundwater samples collected from 2018-2023 are provided in “OBOD_wells_data_2018-2023.xlsx”. Analytical results for surface-water samples from 2018-2023 are provided in “OBOD_sw_data_2018-2023.xlsx”. Benthic macroinvertebrate taxonomic data collected from 2018-2023 at three streams are also provided in “OBOD_benthic_taxa_2018-2023.xlsx”. The field and habitat data for benthic-macroinvertebrate sampling are provided in “OBOD_benthic_field_data_2018-2023.xlsx” and “OBOD_benthic_habitat_data_2018-2023.xlsx”, respectively. The form used to assess habitat is provided in “OBOD_benthic_habitat_assessment_form.xlsx”. The biological metrics for the benthic macroinvertebrate data are provided in “OBOD_benthic_metrics_2018-2023.xlsx”. Analytical results for soil samples collected from 2019-2023 are provided in “OBOD_soil_data_2019-2023.xlsx”. Analytical results for bed sediment samples collected from 2018-2023 are provided in “OBOD_bed_sediment_data_2018-2023.xlsx”. The data files with analytical results also include quality assurance/quality control sample results. NOTE: While previous versions are available from the author, all the records in the previous versions can be found in version 3.0. In this version, water-quality data from 2022 and 2023 were appended to the files. Additional columns with parameter, data qualifier, and remark code information were added to 5 of the data files. First Posted - September 23, 2022 (available from author) Revised - April 18, 2024 (version 2.0 - available from author) Revised - September 2, 2025 (version 3.0)

                                            [
  "010:12"
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                                            {
  "fn": "Shaun J Donmoyer",
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  "hasEmail": "mailto:sdonmoyer@usgs.gov"
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                                            [
  "Franklin County",
  "Pennsylvania",
  "USGS:619ba8ebd34eb622f692fbf8",
  "bed-sediment chemical quality",
  "biota",
  "groundwater quality",
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