Use of Dissolved-Phase Plume Stability to Evaluate LNAPL Body Stability with GWSDAT
Minimum Requirements | Additional Lines of Evidence |
|
|
Dissolved-Phase Plume Stability Condition | LNAPL Body Stability Condition |
Shrinking | Shrinking |
Stable | Shrinking or Stable |
Expanding | Shrinking, Stable, or Expanding |
Figure 1 - Spatial animation showing the interpreted concentration of benzene in the aquifer for each year of monitoring.
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Figure 2 - Benzene plume mass, area, and concentration over time estimated with GWSDAT
Figure 3 - Benzene concentration over time at an individual well
The shrinking benzene plume is a critical risk evaluation component for the Site. It confirms there are no potential new risks as the result of LNAPL or dissolved-phase migration into new areas, barring new releases or significant hydrogeologic changes at the Site.
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