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US Army Corps of Engineers <br /> Soil Vapor Extraction Subsurface Performance Checklist <br /> Site Name 1 ID Former Unocal Service Station #5098 <br /> Contents <br /> 1 Evaluation Team Composition <br /> 2 Typical Treatment Objectives <br /> 3 References <br /> 4 Data Collection Requirements <br /> 5 Performance Analysis Calculations <br /> 6 Adequacy of Operations and Maintenance <br /> 7 Typical Performance Problems <br /> 8 Alternatives for Possible Cost Savings <br /> 9 Supplemental Notes and Data <br /> 1 Evaluation Team Composition <br /> Jim Paulson, P E , John Warren, R C E , Ben Heningburg, Project Manager, Robert <br /> L'Heureux, Staff Engineer, evaluated the system using the checklist provided by the <br /> Army Corps of Engineers Details of that evaluation are presented here <br /> 2 Typical Treatment Objectives <br /> Treatment objectives are to reduce concentrations of vapor phase petroleum <br /> hydrocarbons in the unsaturated zone beneath the site The soil vapor extraction system <br /> (SVE) at the site was designed work with an air sparging system Overall objectives <br /> include operation of the SVE system until site specific water quality objectives are <br /> achieved or until SVE is no longer a feasible remediation option for this site <br /> 3 References <br /> EM 1110-1-4001' Soil Vapor Extraction and Bioventing <br /> ENSR, Inc Monitoring Well Installation Report and Summary of Efforts to Cease Plume <br /> Movement Former Unocal Station No 5098 5400 and 5606 Pacific Avenue, Stockton, <br /> California July 18, 2004 <br /> ENSR, Inc Monthly Air Discharge Report and Analytical Results Former Unocal Station <br /> No 5098 5400 and 5606 Pacific Avenue, Stockton, California October 18, 2004 <br /> ENSR, Inc Updated Site Conceptual Model Quarterly Monitoring and Remediation <br /> Status Well Installation and Well Destruction Report, Third Quarter 2004 Former <br /> Unocal Station No 5098 5400 and 5606 Pacific Avenue, Stockton, California October <br /> 29, 2004 <br /> ENSR, Inc Work Plan and Schedule to Cease Plume Movement and Define Plume <br /> Limits within the B -Zone Former Unocal Station No 5098 5400 and 5606 Pacific <br /> Avenue, Stockton, California June 14, 2004 <br /> ENSR, Inc Work Plan to Evaluate Potential SVEIISAS System Enhancements and <br /> Additional Well Installation within the Deeper Aquifer Units Former Unocal Station No <br /> 5098 5400 and 6606 Pacific Avenue, Stockton, California November 2, 2004 <br />