American petroleum institute in situ air sparging database

Abstract

An evaluation of data detailing in situ air sparging (IAS) systems at 59 sites has been assembled into an American Petroleum Institute in situ Air Sparging Database (API‐IAS Database). The database was developed to provide site managers insights concerning the state‐of‐the‐art of IAS system design, operation, and evaluation. The IAS radius of influence (ROI) is often evaluated based on changes in a number of physical, chemical, or biological monitoring parameters. Measurements of groundwater dissolved oxygen levels was the technique used most often to determine the ROI. Other parameters such as pressure changes in the vadose and saturated zones, groundwater mounding, air bubbling in wells and tracer gases were also used to aid in the determination of the IAS ROI. A review of 37 pilot studies revealed that the IAS ROI is generally between 10 to 26 ft. IAS technology is generally being applied in sandy soils. The application of IAS technology was deemed infeasible at seven sites where soils contained high l...