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CLEARWATER <br /> C R o U P, I N C <br /> 'FABLE OF CONTENTS (CONTINUED) <br /> 6 0 SUMMARY AND DISCUSSION OF SUBSURFACE CONDITIONS <br /> AND FEASIBILITY TEST RESULTS 15 <br /> 7 0 REMEDIAL ACTION PLAN 16 <br /> 71 Purpose and Scope 16 <br /> 72 Evaluation of Soil Remediation Alternatives 16 <br /> 7 2 1 Passive Biodegradation 16 <br /> 7 2 2 Excavation 16 <br /> 7 2 3 Soil Vapor Extraction 17 <br /> 7 2 4 Dual Phase Soil Vapor and Groundwater Extraction 17 <br /> 7 2 5 Evaluation of Soil Vapor Extraction Treatment Alternatives 17 <br /> 73 Evaluation of Groundwater Remediation Alternatives 19 <br /> 7 3 1 Groundwater Extraction and Treatment 19 <br /> 7 3 2 Air Sparging 20 <br /> 74 Selection of Remedial Approach and Conceptual Remedial Design 21 <br />' 741 Remediation Compound 21 <br /> 742 Soil Vapor Extraction and Treatment System 22 <br /> 743 Groundwater Extraction and Treatment System 23 <br /> 744 Air Sparging System 25 <br /> 745 Natural Treatment System Emissions Counter Measures 25 <br /> 746 Proposed Schedule of Remedial Action 25 <br /> 8 0 CONCLUSIONS 26 <br /> 9 0 CERTIFICATION 28 <br /> 10 0 REFERENCES 29 <br />