The system lowers the water table around the well, exposing more of the formation. Bioslurping can improve free-product recovery efficiency without extracting large quantities of ground water. Bioventing of vadose zone soils is achieved by drawing air through the soil via the recovery well. The system is designed to minimize environmental discharge of ground water and soil gas. When free-product removal activities are completed, the bioslurping system is easily converted to a conventional bioventing system to complete the remediation.
Air sparging is an in situ technology in which air is injected through a contaminated aquifer.
Injected air traverses horizontally and vertically in channels through the soil column, creating an underground stripper that removes contaminants by volatilization. This technology is designed to operate at high flow rates to maintain increased contact between ground water and soil and strip more ground water by sparging.