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� l <br /> TABLE OF CONTENTS <br /> 10 EXECUTIVE SUMMARY 1 <br /> 20 INTRODUCTION 4 <br /> 21 Project History <br /> 4 <br /> 22 Current Investigation Objectives 10 <br /> 30 SITE CHARACTERIZATION INVESTIGATION 12 <br /> 3 1 Permitting and Mobilization 12 <br /> 32 Preparation of Workplan and Health and Safety Plan 12 <br /> 33 Field Investigation 12 <br /> 33 1 Geophysical Investigation 13 <br /> 3 3 2 Drilling and Soil Sampling 13 <br /> 3 3 3 Groundwater Grab Sample Collection 15 <br /> 3 3 4 Monitoring Well Installation and Development 15 <br /> 34 Soil and Groundwater Sample Laboratory Analyses 17 <br /> 3 5 Investigation Derived Waste Disposal 17 <br /> 40 SITE INVESTIGATION RESULTS 18 <br /> 4 1 Topography,Geology,and Hydrology 18 <br /> 42 Soil Conditions 20 <br /> 43 Groundwater Conditions 21 <br /> 44 Preliminary Site Conceptual Model 23 <br /> so CONCLUSIONS AND RECOMMENDATIONS 25 <br /> 60 LIMITATIONS AND PROFESSIONAL SIGNATURE 27 <br /> 70 REFERENCES 28 <br /> • <br /> Figure 1 Regional Location Map FIGURES <br /> Figure 2 Site Location Map <br /> Figure 3 Topograpluc Map of Site <br /> Figure 4 Historical Site Activity Map <br /> Figure 5 Groundwater Surface Elevation Map of Lodi <br /> Figure 6 Map Depicting Soil Boring and Monitoring Well Locations <br /> Figure 7 Map Depicting Surface Geology of Area <br /> Figure 8 Legend for Geologic Map <br /> Figure 9 Map of Surface Sods of Area <br /> Figure l0 Legend of Surface Soils Map <br /> Figure 1 I Map Depicting Sod Sample Analytical Results <br /> Figure 12 Map Depicting Groundwater Grab Sample Analytical Results <br /> Figure 13 Cross-Section A-A <br /> Figure 14 Map Depicting Soil and Groundwater Sample Analytical Results <br /> Figure 15 Hydrograph and TPH-Gas and Benzene Concentrations of PT-MW-1 <br /> Figure 16 Site Conceptual Exposure Pathway Model <br /> TABLES <br /> Table I Unified Sod Classification System <br /> Table 2 Tabulation of Soil Boring and Monitoring Well Details <br /> Table 3 Soil Sample Analytical Laboratory Results <br /> Table 4 Groundwater Grab Sample Analytical Laboratory Results <br /> Table 5 Tabulation of Monitoring Well Construction Detail <br /> Table 6 Summary of Vertical and Honzontal Coordinates of Monitoring Wells <br /> APPENDICES <br /> Appendix I Regulatory Agency Correspondence <br /> Appendix 11 Standard Operating Procedures for Soil Borings and Well Construction Procedures <br /> Appendix III Groundwater Monitoring Well Sampling,and Sample Management Procedures <br /> Appendix IV Soil Boring Logs and Logs of Indmdual Monitoring Well Completions <br /> Appendix V Certified Analytical Laboratory Reports <br /> i <br />.10 Mam1D 1EnvironmentallParmari'exawlRepaAsISAR1203 wpd <br />