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1 ✓� <br /> Additional Assessment Report ll <br /> Chevron USA Products Company, 2405 Airport Way, Stockton, California September 23, 1994 <br /> r <br /> CONTENTS <br /> 1 0 INTRODUCTION 1 <br /> 20 BACKGROUND 2 <br /> I <br /> 3 0 ADDITIONAL ASSESSMENT WORK 3 <br /> 31 Site-Specific Health and Safety Plan/Background Review/Permitting 3 <br /> 32 Sod Boring 3 <br /> 33 Sod Sampling 3 <br /> 34 Groundwater Monitoring Well Installation/Surveying/Development 4 <br /> 35 Groundwater Monitoring and Sampling 4 <br /> 36 Wellhead Repair 5 <br /> 37 DWR Records Vicinity Well Search 5 <br /> 4 0 RESULTS OF ADDITIONAL ASSESSMENT 6 <br /> 41 Hydrogeology 6 <br /> 4 2 Results of Sohl Sample Analyses 6 <br /> 4 3 Results of Groundwater Sample Analyses 6 <br /> 50 REFERENCES 7 <br /> Figures <br /> 1 Site Location Map <br /> 2 Site Plan <br /> 3 Potentiometric Surface Map (July 8, 1994) <br /> 4 Potentiometnc Surface Map (August 22, 1994) <br /> Tables <br /> 1 Well Inventory <br /> 2 Analytical Results for Soil <br /> 3 Historical Groundwater Analytical Results of Groundwater and Monitoring Data <br /> Appendixes <br /> A Well Installation Permits <br /> B Drilling Logs and Well Construction Specifications <br /> C Well Survey Data <br /> D Field Data <br /> E Laboratory Reports and Chain-of-Custody Manifests <br /> 50385UM RPT <br /> _ �'� GRQUNDWATER <br /> TECHNOLOGY <br />