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      Question

      What technology involves the injection of

      contaminant-free air into the subsurface saturated zone, enabling a phase transfer of hydrocarbons from a dissolved state to a vapor phase?
      A Soil Washing Correct Answer Incorrect Answer
      B Biopile Treatment Correct Answer Incorrect Answer
      C Air Sparging Correct Answer Incorrect Answer
      D Osmosis Correct Answer Incorrect Answer

      Solution

      Air Sparging. Air sparging reduces concentrations of volatile constituents in petroleum products in soils and dissolved in groundwater.

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