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Corrective Action Plan <br /> Montgomery Ward Auto Service Center, Stockton, CA <br />' 8.0 REMEDIAL SYSTEM <br /> 8.1 System Overview <br />' Figure 11 provides a simplified conceptual process flow diagram for the remediation <br /> system Key elements of the systems operation include <br /> ■ Injecting pressurized air into the ground water through selected air sparging wells <br /> Extracting soil vapors from two nested vapor extraction wells <br /> ■ Treating extracted vapors <br /> ■ Performing an initial optimization test including <br />' - Measuring dissolved oxygen at air sparging monitoring wells around the <br /> selected air sparging well <br /> - Measuring water levels at the sparging well and surrounding air sparging <br />' monitoring well locations <br /> - <br /> Monitoring pressure at each vapor extraction system well and soil vapor probe <br /> locations <br />' - Measuring ground water concentrations at the sparging well and surrounding air <br /> sparging monitoring well locations <br /> - Measuring the concentration of extracted vapors using field instruments (i e , <br /> PID) and by analytical laboratories <br /> - Measuring ground water concentrations, pressure readings and vapor <br /> concentrations as a function of time and distance <br /> ■ Performing regular operations and maintenance of the system, including monitoring <br /> of the dissolved oxygen level, water levels, extraction rate, vapor concentrations at <br /> inlet and exhaust of treatment unit, utility usage and hours of operation <br />' 8.2 Design Parameters <br /> Soil Vapor Extraction System <br />' The following data were obtained from the pilot study performed by EAI and used as <br /> design parameters for the SVES <br />' ■ Radius of Influence ROI <br /> The ROI was determined to be the following <br />' - 60 feet (for vacuum ranging from 80 to 100 inches water column and 250 scfm <br /> of flow) <br /> 100 feet (for vacuum over 140 inch water column and 200 scfm of flow) <br /> Soil Pe,`�ncability (K` <br /> K was determined to range from 200 to 600 darcies, with an average of 400 <br /> darcies <br /> ■ Vapor Treatment E-urine;-it <br /> A thermal or catalytic oxidizer will be use to treat the extracted vapor The <br /> appropriate unit must meet the following specifications <br /> Project No 1232 - 21 - <br /> SAH WOAD 1252CAP <br />