text: Several technologies are related to soil vapor extraction.  As noted above, various soil-heating remediation technologies (e.g., electrical resistive heating, in situ vitrification) require a soil gas collection component, which may take the form of SVE and/or a surface barrier (i.e., hood). Bioventing is a related technology, the goal of which is to introduce additional oxygen (or possibly other reactive gases) into the subsurface to stimulate biological degradation of the contamination.  In situ air sparging is a remediation technology for treating contamination in groundwater.  Air is injected and "sparged" through the groundwater and then collected via soil vapor extraction wells.