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CIARWATER <br /> C R O U m P, I N C <br />' 'TABLE OF CONTENTS <br />' <br /> 10 INTRODUCTION 1 <br /> 11 Purpose and Scope 1 <br /> 12 Site Description and Background 1 <br /> 13 Previous Investigations 2 <br /> 20 INVESTIGATIVE METHODS 3 <br /> 21 Well Installation and Soil Sampling 3 <br /> 2 11 Purpose and Scope 3 <br /> 2 12 Soil Borehole Drilling and Sampling 3 <br /> 2 13 Recovery Well Installation and Development 4 <br /> 2 14 Sparge Well Installation 4 <br /> 22 Groundwater Sampling (4th Quarter 1995 and 1st Quarter 1996) 4 <br /> 2 2 1 Groundwater Gauging and Sampling Methods 4 <br /> 30 RESULTS OF RECENT INVESTIGATION 5 <br /> 31 Subsurface Sedimentology 5 <br /> 32 Soil Sample Results 5 <br /> 33 Groundwater Gradient 5 <br /> 3 3 1 4th Quarter 1995 5 <br /> 3 3 2 1st Quarter 1996 5 <br />' <br /> 34 Groundwater Sample Analytical Results 6 <br /> 3 4 1 4th Quarter 1995 6 <br /> 3 4 2 1st Quarter 1996 6 <br /> 40 SUMMARY OF CONTAMINATION 6 <br /> 4 1 Summary of Vadose Zone Contamination 6 <br /> 4 2 Summary of Shallow Groundwater Contamination 7 <br /> 50 FEASIBILITY TESTING 2 <br /> 51 Purpose and Scope 7 <br /> 52 Feasibility Testing Field Methods g <br /> 5 2 1 Aquifer Testing g <br /> 5 2 2 Dual-Phase Groundwater and Soil Vapor Extraction Testing S <br /> 5 2 3 Soil Vapor Extraction Testing 9 <br /> 5 2 4 Air Sparge Testing 9 <br /> I <br /> S3 Feasibility Test Results 9 <br /> 5 3 1 Aquifer Test Results 9 <br /> 5 3 2 Dual-Phase Groundwater and Soil Vapor Extraction Test Results 11 <br /> 5 3 3 Soil Vapor Extraction Test Results 12 <br /> 5 3 4 Air Sparge Test Results 13 <br />