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TABLE OF CONTENTS <br /> 1.0 INTRODUCTION...............................................................................................................................1 <br /> 1.1 SUPPLEMENTAL SITE INVESTIGATION OBJECTIVES.....................................................:.......1 <br /> 1.2 SCOPE OF WORK..............................................................................................................................1 <br /> 2.0 SUMMARY OF SITE BACKGROUND AND PREVIOUS SITE ACTIONS...............................1 <br /> 2.1 SITE HISTORY AND DESCRIPTION..............................................................................................1 . <br /> 2.2 PRIOR ASSESSMENTS AND DTSC DETERMINATION..............................................................2 <br /> 3.0 SAMPLING STRATEGY...................................................................................................................5 <br /> 3.1 LAWN AREA.....................................................................................................................................6 <br /> 3.2 STRUCTURE DRIPLINES............................................. ..................................................................6 <br /> 3.3 SOIL GAS ANOMALY AT NORTHERN SITE BOUNDARY........................................................7 <br /> i <br /> 4.0 PROPOSED RISK ASSESSMENT PROCESS................................................................................8 <br /> 5.0 PROJECT SCHEDULE......................................................................................................................8 <br /> APPENDICES <br /> APPENDIX A <br /> Figure 1 Vicinity Map <br /> Figure 2 Site Map <br /> Figure 3 Lawn Area Sample Locations with Dieldrin and Heptachlor Epoxide Concentrations (PEA) <br /> Figure 4 Structure Dripline Sample Locations with Lead Concentrations(PEA) <br /> Figure 5 Soil Gas and Groundwater Sample Locations with Selected Soil Gas Results(PEA) <br /> Figure 6 Proposed Organochlorine Pesticides SSI Soil Sample Locations <br /> Figure 7 Structure Driplines Proposed SSI Soil Sample Locations(West) <br /> Figure 8 Structure Driplines Proposed SSI Soil Sample Locations(East) <br /> Figure 9 Soil Gas Anomaly Proposed SSI Boring Locations <br /> APPENDIX B <br /> PEA Analytical Results(Summary) <br /> APPENDIX C <br /> Proposed Sampling Scheme <br /> Analytical Methods, Laboratory Detection Limits, and PRG Values <br /> LIST OF TABLES <br /> Table 1 —Summary of PEA Sampling and Analyses....................................................................................3 <br /> Table 2—Summation of Risk and Hazard For All Constituents Of Potential Concern(excluding Lead)....5 <br /> Table'3 —Proposed SSI Sampling Program(Lawn Area).............................................................................6 <br /> Table 4—Proposed SSI Sampling Program(Structure Driplines)................................................................7 <br /> Table 5—Proposed SSI Sampling Program(Soil Gas Anomaly).................................................................8 <br /> i <br /> 1� CONDOR <br />