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TABLE OF CONTENTS <br /> Page <br /> I. INTRODUCTION ................................................................................................................1 <br /> 2. BACKGROUND ......... —...—.......................................................-........ ................... <br /> 3. SITE CONDITIONS............................................................................................................4 <br /> 3.1 Occurrence and Distribution of Detected TPH for Soil Samples............................5 <br /> 3.2 Occurrence and Distribution of Detected TPH for Water Samples.........................5 <br /> 3.3 Product Removal................................................*.......*..............—..............*.............9 <br /> 3.4 Potential for Migration Surface Water and Drinking Water Impacts......................9 <br /> 3.5 Human Health Risks...........1.—I. <br /> 4. CORRECTIVE ACTION OBJECTIVE............................................................................16 <br /> 5. CORRECTIVE ACTION ALTERNATIVES EVALUATION ........................................16 <br /> 5.1 Alternative Al: Excavation of soils containing 500 mg/kg TPH or more.............16 <br /> 5.2 Alternative A2: Excavation with Limited Vertical Extent (5 feet into the <br /> WaterTable) ................................:......................................................... ...........17 <br /> 5.3 Alternative A3: Extend excavation laterally to MW-3 and vertically extend to <br /> adepth of 28 feet.....................................................................................................18 <br /> 6. SUMMARY AND RECOMMENDATIONS....................................................................19 <br /> 7. REFERENCES .....................................:............................................................................22 <br /> FIGURES <br /> Figure I Site Location Map................ ................-............................... ...... .................... 2 <br /> Figure2 Site Layout Map.......-.............................................................................................3 <br /> Figure 3 Site Plan with Groundwater Results........................................................................8 <br /> TABLES <br /> TableI Site Chronology.........................:.............................................................................4 <br /> Table 2 Soil Sample Results ...............::................................................................................6 <br /> Table 3 Grab Groundwater Analytical Results.:.................................................................10 <br /> Table 4 Groundwater Analytical Results............................................................................11 <br /> Table 5 ESLs Compared to Site Conditions.......................................................................15 <br /> Table 6 WQO's Compared to Site Conditions....................................................................15 <br /> Table 7 Comparison of Remedial Alternatives...................................................................21 <br /> APPENDICES <br /> Appendix A Alternative Al Detailed Maps and Cost Analysis <br /> Appendix B Alternative A2 Detailed Maps and Cost Analysis <br /> Appendix C Alternative A3 Detailed Maps and Cost Analysis <br /> i <br /> K:ICO'N'T'GRAN\StocktonlCAP\CAP ADDENDUM <br />