This photograph shows our air sparger setup. We have a low pressure high volume compressor attached to hosing which enters the sparge well shown in the foreground. The 45 gallon barrell was periodically filled with a nitrate fertilizer. About one to two gallons per minute of water was injected into this sparge well which had been circulated through the barrell. Additional sparge wells were located at other areas of the site.
Soil contamination is seen in the grey coloured soils at the bottom of the excavation.
These soils initially were about 3 to 4 times the commercial criteria when excavated. Soils were an unconsolidated sandstone which broke into a silty sand when stripped from the excavation. We ran the system 24 hours per day for about a month in the various wells available onsite. The site presently has a 3 story building present. The contractor who owned the land throughout the process was pleased with the final results.