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Soil vapor extraction (SVE) is a physical treatment process for in situ remediation of volatile contaminants in vadose zone (unsaturated) soils (EPA, 2012). SVE (also referred to as in situ soil venting or vacuum extraction) is based on mass transfer of contaminant from the solid (sorbed) and liquid (aqueous or non-aqueous) phases into the gas phase, with subsequent collection of the gas phase ...
Soil vapor extraction (SVE) involves the use of multiple air injection points and multiple soil vapor extraction points that can be installed in contaminated soils to extract vapor phase contaminants above the water table. Contamination must be at least 3 feet (0.91 m) deep beneath the ground surface in order for the system to be effective.
In 1998, the EPA selected the soil vapor extraction method to clean up contaminated soils left behind after excavating the underground storage tanks. Commonly used throughout the country for this VOCs type of pollution remediation, soil vapor extraction removes toxic vapors from the soil, then treats them in a thermal oxidation system.
In September 1983, the site was listed in the National Priorities list by the EPA. Long-term removal actions consisted of using a soil vapor extraction system which was activated in 1995 and is still in use. This helped to clean up over 345 million gallons of contaminated water from the ground.
A second round of soil vapor extraction from the contaminated site occurred in 2017 after years of planning and setup. [3] A SVE system was used to extract toxic vapor from soil on the site in a $10 million dollar operation. [4] By 2018 all equipment had been removed by the EPA.
These efforts included debris removal; contaminated soil excavation, treatment, and removal; groundwater extraction and treatment; and soil vapor extraction. Since remediation, the United States Environmental Protection Agency (EPA) has conducted multiple five-year reviews of the site, with completion of the most recent five-year review in July ...
Extraction of groundwater or soil vapor with an active electromechanical system, with subsequent stripping of the contaminants from the extract. Containment of the soil contaminants (such as by capping or paving over in place). Phytoremediation, or using plants (such as willow) to extract heavy metals.
Volatilized contaminants are captured by a subsurface vapor recovery system and conveyed to the surface along with recovered air and steam. Similar to Soil vapor extraction, the air, steam and volatilized contaminants are then treated at the surface to separate water, air and the contaminants. Treatment of the various streams depends on local ...