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Air Sparging Pilot Test Related Activities Report and Remedial Action Work Plan <br />Former Countryside Market, Stockton, California April 30, 2015 <br />TABLE OF CONTENTS <br />4.6 <br /> <br />4.5.4 Groundwater Level Changes (AS-2 Testing) <br /> <br />4.5.5 Dissolved Oxygen Monitoring (AS-2 Testing) <br /> <br />4.5.6 Oxidation-Reduction Potential Monitoring (AS-2 Testing) <br /> <br />4.5.7 Soil Vapor Monitoring (AS-2 Testing) <br /> <br />4.5.8 Helium Tracer Monitoring (AS-2 Testing) <br />Transducer Results <br />4-9 <br />4-9 <br />4-9 <br />4-10 <br />4-10 <br />4-10 <br />5.0 AIR SPARGING TESTING SUMMARY AND CONCLUSION 5-1 <br />5.1 Breakthrough Testing 5-1 <br />5.2 Injection Flow 5-1 <br />5.3 Pressure Response 5-1 <br />5.4 Groundwater Level Changes 5-1 <br />5.5 Dissolved Oxygen Monitoring 5-2 <br />5.6 Oxidation-Reduction Potential Monitoring 5-2 <br />5.7 Soil, Soil Vapor and Groundwater Concentrations 5-2 <br />5.7.1 Mass Calculation of TPHg in Soil 5-2 <br />5.8 Helium Tracer Monitoring 5-3 <br />5.9 AS Effectiveness and Estimated AS ROI 5-3 <br />5.10 SVE Effectiveness and Estimated SVE ROI 5-3 <br />6.0 REMEDIATION WORK PLAN 6-1 <br />6.1 Air Sparge and Soil Vapor Extraction System Engineering Design 6-2 <br />6.2 Air Sparge Well Installation 6-2 <br />6.2.1 Air Sparge Remediation Piping 6-2 <br />6.2.2 Air Sparge Remediation Equipment 6-3 <br />6.3 Soil Vapor Extraction Well Installation 6-3 <br />6.3.1 Soil Vapor Extraction Piping 6-4 <br />6.4 Permitting 6-4 <br />6.5 Health and Safety Activities 6-4 <br />6.6 System Startup 6-4 <br />6.6.1 AS/SVE System Startup Activities 6-5 <br />6.7 Routine AS/SVE System Operation & Maintenance Activities 6-5 <br />6.7.1 Vapor Stream Sampling 6-6 <br />6.7.2 Water Handling 6-6 <br />6.7.3 Carbon Changeout 6-6 <br />7.0 REPORTING 7-1 <br />7.1 Startup Reporting 7-1 <br />7.2 Routine Monitoring Reporting 7-1 <br />8.0 ESTIMATED PROJECT SCHEDULE 8-1 <br />9.0 REFERENCES 9-1 <br />The Source Group, Inc.