Schematic of ECRS unit configured for in situ air sparging studies. Shell WTC, Jonathan Miller and Ira Dortch - Air sparging was initiated and DO levels immediately went up to 4 or 5 ppm in the vicinity of the sparge point. Water table mounding was also observed and hydrocarbon concentrations in the off-gas rose dramatically, as expected. Our aim is to complete a mass balance to determine the fate of the 2.5 kg of gasoline. In particular, we will estimate the fraction that was removed by sparging, as well as the fraction by biodegradation and by volatilization.
System testing is in progress.
Air sparging research will commence in April 1997.