Installation Restoration Program. Phase 2. Confirmation/Quantification. Stage 1 for Cannon AFB, New Mexico. Volume 1. Text

摘要

The program consisted of installation and sampling of four monitor wells and 41 soil borings at 15 locations on-base. The four monitor wells were located in a one-upgradient, three-downgradient configuration surrounding the active base landfill (Site No. 5). Wells were drilled to about 15 feet below the top of the saturated zone of the Ogallala Formation. Each well was completed with a four-inch diameter PVC casing and 15-foot screen and equipped with a dedicated submersible pump. Ground-water levels were measured to confirm the local ground-water flow direction and samples were collected for analysis of selected organic and inorganic parameters. Resulting data revealed no evidence of contamination by purgeable halocarbons or aromatics, oil and grease, pesticides, or metals. Soil samples were collected as cuttings or cores immediately above, five feet into, and immediately below the base of the caliche zone in each borehole at the 15 project sites. Some deep soil core samples were unobtainable due to the unconsolidated nature of the caliche. Analytical results confirm the presence of oil and grease components in the upper soil zone at several sites. Metals concentrations are generally low, except for some isolated species in samples from site Nos. 1 and 12. Elevated pesticide concentrations were detected in soil samples from Site No. 17.