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SITE TECHNOLOGY CAPSULE: SUBSURFACE VOLATILIZATION AND VENTILATION SYSTEM (SVVS)
Citation:
Ring, J. J. AND S. Beckman. SITE TECHNOLOGY CAPSULE: SUBSURFACE VOLATILIZATION AND VENTILATION SYSTEM (SVVS). EPA/540/R-94/529a (NTIS 95-256111), 1995.
Impact/Purpose:
publish informaiton
Description:
The Subsurface Volatilization and Ventilation System is an integrated technology used for attacking all phases of volatile organic compound (VOC) contamination in soil and groundwater. The SVVS technology promotes insitu remediation of soil and groundwater contaminated with or-ganic compounds through the injection of air into the saturated and unsaturated zones, and extraction of vapors from the vadose zone. Through this process, volatile and semivolatile organic compounds are stripped from the soil and groundwater. The subsurface circulation of air also increases dissolved oxygen concentrations in the saturated zone, capillary fringe, and vadose zone, thereby promoting aerobic microbiological processes. The contaminated air extracted from the wells can be treated at the surface before being discharged to the environment. The SVVS process was evaluated under the SITE program at the EV facility in Buchanan, Ml. The soils were contaminated with aromatic hydrocarbons, and halogenated and non-halogenated volatile and semivolatile organic com-pounds (SVOCs) through discharge into a dry well. Baseline data indicated that approximately 1,000 kg of VOC and SVOC contamination was present in the dry well area soils, princi-pally in a subsurface sludge layer. The developer claimed that their technology would reduce the sum of seven target VOCs by 30% over a 1-yr period. The results from the demonstration indicate the SVVS technology greatly exceeded their claims by providing a site average 80.6% reduction of volatile organics in the vadose zone. Furthermore, aerial and vertical reductions across the site did not indicate the presence of any zones that were not treated by the system. The SVVS process proved to be reliable and required minimal operator oversight. The technology did not experience significant operational difficulties during the evaluation period. The SVVS remediation technology was evaluated based on seven criteria used for decision making in the Superfund feasibility study (FS) process. Results of the evaluation are summarized in Table 1.
URLs/Downloads:
SITE TECHNOLOGY CAPSULE: SUBSURFACE VOLATILIZATION AND VENTILATION SYSTEM (SVVS)540R94529A.PDF (PDF, NA pp, 1 KB, about PDF)