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i <br /> TABLE OF CONTENTS <br /> INTRODUCTION .. .. . . .. .. . ......... . ............. ........... ...... . .... .1 <br /> SITE DESCRIPTION .. .. .... ... .... ........ . .. 1 <br /> PREVIOUS ENVIRONMENTAL WORK.... ... ... ... . ........1 <br /> Investigation Summary 1 <br /> Groundwater Monitoring and Sampling 3 <br /> OZONE MICROSPARGE SYSTEM PILOT TEST.. ...... ... . ...... .. .. ......... .... ..........3 <br /> System Installation 3 <br /> System Operation 4 <br /> Groundwater Sampling 4 <br /> Groundwater Sampling Results 4 <br /> TPHg Concentrations 4 <br /> Benzene Concentrations 5 <br /> DISCUSSION .... .. ..... .. . .. .. ... ..... ...... .... .... . .. ... ...... 5 <br /> RECOMMENDATIONS. . ............. . . ... .. ... ... . ......... ... . . . .... .6 <br /> TABLES <br /> Table 1 C-Sparge System Pilot Test Groundwater Chemical Analytical Results <br /> FIGURES <br /> Figure 1 Vicinity Map <br /> Figure 2 Extended Site Plan <br /> Figure 3 Concentration Map <br /> Figure 4 Potentiometric Map(Zone A) <br /> Figure 5 Potentiometric Map (Zone B) <br /> APPENDICES <br /> Appendix A Groundwater Concentration and Depth to Water Graphs <br /> Appendix B Historical Quarterly Groundwater Monitoring and Sampling Data <br /> Appendix C Laboratory Analytical Reports and Chains-of Custody <br />