Groundwater Elevation and Contaminant Levels, Correlation, or Causation.How can you tell?
Groundwater Elevation and Contaminant Levels, Correlation, or Causation. How can you tell? "The obvious is that which is never seen until someone expresses it simply." -Kahlil Gibran Over the years I've heard a lot of explanations regarding groundwater elevations and subsequent increases and/or decreases in contaminant levels and the presence and disappearance of free product. I've heard people argue that increasing water levels increase contamination, and I've also heard the opposite. Some people believe that increasing water levels causes free product to disappear and that decreasing levels cause it to re-appear (which is counter-intuitive to a lay person). The question or debate is (all other things being equal): does groundwater elevation have an effect on contaminant levels? Furthermore, does groundwater elevation have an effect on the presence or absence of free product? These are a question of correlation or causation. I've been d...
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