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TABLE OF CONTENTS <br /> 1.0 INTRODUCTION .......... .... . ... ..... . . . ........... ... ... . .. . . ............ . . 1 <br /> 20 SITE DESCRIPTION AND HISTORY TO DATE.... .. .. . 1 <br /> 21 Investigative History 2 <br /> 22 Soil Investigation 2 <br /> 22 1 Soil Boring Logs 2 <br /> 2 2 2 Geologic Cross-Sections 3 <br /> 2 2 3 Summary of Soil Analysis 3 <br /> 2 2 4 Cross-section of TPHg Profile in Soil 3 <br /> 2 2 5 TPHg in Soil - Iso-Concentration Contour Map and Estimated Parameters <br /> for Mass Calculation 3 <br /> ' 2 2 6 Calculation of TPHg Mass in Soil - Pre-Remediation 3 <br /> 23 Summary of Soil Investigation and Analysis 3 <br /> 24 Groundwater Monitoring 4 <br /> ' 2 4 1 Groundwater Analytical Results 4 <br /> 2 4 2 Groundwater Elevation and Gradient 4 <br /> 2 4 3 Groundwater Iso-Concentration Contour Maps for TPHg and Benzene 4 <br /> ' 2 4 4 Pre-remediation Mass Calculations of TPHg and Benzene Dissolved in <br /> Groundwater 5 <br /> 3.0 REMEDIATION SYSTEM AND EFFECTIVENESS... .. ...... .. 5 <br /> 3 1 Co-extraction of Soil Vapor and Groundwater 5 <br /> 3 1 Groundwater Cleanup 5 <br /> ' <br /> 32 Microbial Activity 6 <br /> 3 3 SVE Radius of Influence Testing 6 <br /> 34 Summary of Product Removal 6 <br /> ' 4.0 IMPACT OF NO FURTHER ACTIVE REMEDIATION................... 7 <br /> 4 1 Health and Safety 7 <br /> 42 Impact to Surface Water 7 <br /> ' <br /> 43 Sensitive Receptor Survey 7 <br /> 43 1 Public Water Supply Wells 8 <br /> 4 3 2 Schools 8 <br /> 44 Intrinsic Biodegradation •. •„• 9 <br /> 50 CONCLUSIONS AND RECOMMENDATION. .. 9 <br /> 6.0 CERTIFICATION........ . . . . . . .. .. . . . . .. .... . .. ., 10 <br /> ' 7.0 REFERENCES ... . . . . .. . . . . . . . . .... .. .. .. 11 <br /> 8.0 DISTRIBUTION... . .. . .. .. 11 <br /> 1 <br /> 1 <br />