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CLEAkWV__E_R <br /> Ir. c R o u P <br /> Envlrvnviendaf Services <br /> TABLE OF CONTENTS <br />' 10 INTRODUCTION 1 <br /> 1 1 Purpose and Scope 1 <br />' <br /> 12 Site Descnption 1 <br /> 1 3 Previous Investigations 1 <br />' <br /> 20 GROUNDWATER MONITORING - THIRD QUARTER 2002 4 <br /> 21 Purpose 4 <br /> 2 2 Groundwater Momtonng Activities 4 <br />' 2 3 Groundwater Elevations and Gradient 5 <br /> 2 4 Groundwater Sample Analytical Results 5 <br />' 3 0 SUMMARY OF HYDROGEOLGY AND CONTAMINATION 6 <br /> 31 Hydrogeology 6 <br /> 3 2 Contaminants of Concern 6 <br /> 3 3 Sorbed-Phase Contamination 7 <br /> 3 4 Dissolved-Phase Contamination 7 <br /> 40 SENSITNE RECEPTOR SURVEY 8 <br /> 41 Buildings 8 <br />' 4 2 Nearby Production Wells 8 <br /> 4 3 Nearby Surface Water Bodies 9 <br /> I5 0 CLEAN-UP GOALS 9 <br /> 60 EVALUATION OF REMEDIAL ALTERNATIVES 11 <br /> 61 Purpose and Scope 11 <br /> 62 Remedial Alternatives for Soil 12 <br /> 6 2 1 Soil Excavation 12 <br /> 622 Soil Vapor Extraction and Treatment 13 <br /> 63 Remedial Alternatives for Groundwater 14 <br /> 63 1 Air Sparging(In-Situ Volatilization) 14 <br /> 632 Groundwater Extraction and Treatment 15 <br /> 6 3 3 Enhanced Bioremediation (In-Situ) 16 <br />' 64 Summary and Selection of Remedial Alternative 18 <br /> I <br /> I <br /> ZB178C 11 November 20,2002 <br />