Air Force landfills are candidates for alternative remediation because:
- Most have been inactive for a quarter century or more
- They have
no bottom linters
- Most have produced limited groundwater contamination
- The waste contains construction rubble, and is decayed
The Air Force has used "no further action" at about 12 percent of its closed
landfill sites. Air Force landfills are good candidates for alternative remediation
methods including: (1) no further action, (2) limited action, and (3) the ET
landfill cover.
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Use No Further Action if:
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Avoid No Further Action if:
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Contaminant pathways are incomplete
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Contaminant pathways are complete and threaten human health and the
environment
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Complete pathways do not threaten human health or the environment
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Groundwater plume is expanding or increasing in concentration
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Groundwater plume is stable or decreasing in size/concentration
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Site specific requirements
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Limited action is similar to "no further action" except that a specific action
is required (e.g. potholes on the existing surface need to be filled to provide
adequate surface drainage). Limited action is typically inexpensive compared
to conventional remediation.
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Use the ET Landfill Cover
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Avoid the ET Landfill Cover
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Where the PET/Precipitation ratio is greater than 1.2
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Carefully evaluate requirements if the PET/Precipitation ratio is less
than 1.2
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Where adequate soil resources are available near the landfill
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Where the available soil is sandy, toxic, saline or otherwise unsuitable
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Where the established goal for the landfill cover can be achieved by
an ET landfill cover
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Where the goal for remediation can not be met by the ET landfill cover
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See the available AFCEE guidance documents for additional details.
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