Plans and Practices for Groundwater Protection at the Los Alamos National Laboratory Final Report (2007) / Chapter Skim
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Color Plates
Color Plates
Pages 81-92
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Color Plates
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A B PLATE 1 Satellite photograph of the Los Alamos area of the Española Basin. Green indicates areas of greater vegetation in this false-color image.
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Note that the representative canyon cuts from the Sierra de Los Valles and surface water flows toward the Rio Grande. Alluvial material is erosional sediment, including gravels, sands, silts, and clays, that is deposited by surface water.
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From page 85... ...
The Radioactive Liquid Waste Treatment Facility discharges wastes from Outfall 051 into Mortandad Canyon, and a power plant and sanitary waste facility discharge wastes from Outfall 001 into Sandia Canyon. Discharges from these two facilities and other currently operating facilities meet NPDES and DOE requirements.
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Some are relatively near fast vadose zone pathways identified by LANL. Thus far in LANL's groundwater protection program solid waste disposal areas have received relatively less attention than liquid outfalls.
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A Plutonium distribution in surface soils (0-1 ft) B Plutonium distribution in top of the regional groundwater PLATES 5a,b (facing page)
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Tritium has been detected in both the shallow alluvial groundwater and the regional aquifer. These plots are for illustrative purposes only.
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Mortandad Canyon is located above the Mortandad watershed, which is shown on Color Plates 9 and 10. LANL considers this canyon to be a significant source of groundwater contamination.
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PLATE 8 Occurrences of perched water beneath the LANL site. Small zones of intermediate-depth groundwater are referred to as "perched" because they occur in the unsaturated zone above the more laterally extensive and productive regional aquifer.
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PLATE 9 Well and borehole emplacements at LANL in about 1997. Most wells are water supply wells, which reach the regional aquifer.
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The original intent of this work was to improve LANL's knowledge of the site's hydrogeology in order to begin planning a groundwater monitoring network. Extending the use of the R-wells for groundwater monitoring has been controversal, as discussed in Chapter 5.
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