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US Army Corps of Engineers <br /> In Situ Air Spargmg Subsurface Perlor nance Checklist <br /> Site Name / 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 in this document <br /> 2 Typical Treatment Objectives <br /> • The treatment objective for the In Situ Air Sparge System (ISAS) is to reduce <br /> concentrations of dissolved petroleum hydrocarbons in the saturated zone beneath <br /> the site The ISAS system was designed to operate in conjunction with a soil vapor <br /> extraction (SVE) system at the site Overall objectives include operating the ISIAS <br /> system until site specific water quality objectives are achieved or until ISAS is no <br /> longer a feasible remediation option for this site <br /> 3 References <br /> ENSR, Inc Monitoring Well Installation Report and Summa of Efforts to Cease <br /> Plume Movement Former Unocal Station No 5098 5400 and 5606 Pacific Avenue, <br /> Stockton, California July 18, 2004 <br /> ENSR, Inc Monthly Air Discharge Report and Analytical Results Former Unocal <br /> Station No 5098 5400 and 5606 Pacific Avenue, Stockton, California October 18, <br /> 2004 <br /> ENSR, Inc Updated Site Conce tual Model Quarterly Monitoring anti Remeaiation <br /> Status Well Installation and Well Destruction Report, Third Quarter 2004 Former <br /> Unocal Station No 5098 5400 and 5606 Pacific Avenue, Stockton, California <br /> October 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 />