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TABLE OF CONTENTS <br /> PAGE <br /> 10 Executive Summary 3 <br /> 20 Introduction 4 <br /> 30 Subsurface Drilling and Sampling(Field Methods) 4 <br /> 3 1 Excavation 4 <br /> 3 2 Temporary Dewatering Points, Treatment and Disposal 5 <br /> 3 3 Soil Sampling 6 <br /> 3 4 Groundwater Sampling 6 <br /> 40 Chemical Analysis 6 <br /> 4 1 Laboratory Quality Control 7 <br /> 50 Subsurface Observations 7 <br /> 60 Discussion 8 <br /> 6 1 Interpreted Contaminant and Residual Soil Plume Location 8 <br /> 6 2 Estimated Contaminant Volume Removed 9 <br /> 6 3 Residual Soil and Groundwater Contaminants 10 <br /> 70 Conclusions and Recommendation 10 <br /> 80 Limitations 11 <br /> Table 1 Soil Excavation Chemical Data 12 <br /> Table 2 Excavation Groundwater Chemical Data 13 <br /> Figure 1 Soil Excavation Areas <br /> Figure 2 Soil Sample Locations and Chemical Data <br /> Excavation Perimeter Capillary Fringe <br /> Figure 3 Interpreted Location Soil TPHG Isoconcentration Contour Map <br /> 10-11 Feet Below Surface <br /> Figure 4 Interpreted Location Soil Benzene Isoconcentration Contour Map <br /> 10-11 Feet Below Surface <br /> Appendix A Site Photographs <br /> Appendix B Chemical Analytical Reports and Chain-0f-Custody and <br /> Kiff Analytical Letter Regarding Methylene Chloride <br /> Appendix C Landfill Soil Transportation Information <br /> Appendix D San Joaquin County Environmental Health Department Permits <br /> Appendix E City of Tracy Discharge Permit & Carbon Filter System Diagram <br /> i <br />