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Installation Restoration Program Phase 2. Confirmation/Quantification Stage 1 for Air Force Plant PJKS Watertown, Colorado.

Descriptive Note:

Final rept. Oct 85-Oct 86.

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A field investigation was conducted to confirm or deny the presence of hazardous wastes at eight sites at Air Force Plant PJKS near Waterton, Colorado. Activities at the plant that could have generated hazardous wastes include the development and testing of rocket engines. The field program included sampling of surface waters, soils, and sediments, and the installation and sampling of eight ground water monitoring wells. Hazardous substances found at the eight sites included TCE and other halocarbons, NDMA a decomposition product of hydrazine, phenols, and trace amounts of heavy metals, including arsenic, hexavalent chromium, and selenium. Elevated levels of radiation were detected in ground waters downgradient from a landfill known to contain a small amount of low-level radioactive magnesium-thorium alloy. Since natural uranium mineralization occurs within the area, the background level of radiation needs to be established before the significance of the measured radiation can be determined. Contamination of soils and sediments was determined to be of low significance because of the low levels of contamination and a lack of pathways for offsite migration. Contamination of surface and ground waters at some sites was judged to be moderately significant because the contaminants occurred at concentrations exceeding standards or guidelines to protect human health, and the potential for contaminant migration exists. Plans for future studies to determine the sources and extent of surface and ground water contamination were developed.

Subject Categories:

  • Water Pollution and Control
  • Solid Wastes and Pollution and Control
  • Environmental Health and Safety

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