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TECHNICAL EVALUATION <br /> FORMER AFPC STOCKTON FACILITY <br /> STOCKTON, CALIFORNIA <br /> TABLE OF CONTENTS <br /> SECTION PAGE <br /> 10 INTRODUCTION 1 <br /> 11 PURPOSE I <br /> 1 2 REPORT ORGANIZATION 1 <br /> 20 BACKGROUND 2 <br /> 3 0 SCOPE OF WORK 4 <br /> 4 0 NATURE AND EXTENT OF CONTAMINATION 5 <br /> 4 1 SOIL 5 <br /> 4 2 GROUNDWATER 6 <br /> 5 0 TECHNOLOGY SCREENING AND DEVELOPMENT OF REMEDIAL OPTIONS 8 <br /> 5 1 GENERAL RESPONSE ACTIONS 8 <br /> 5 2 SCREENING OF TECHNOLOGY TYPES AND PROCESS OPTIONS 9 <br /> 5 2 1 No-Action 10 <br /> 5 2 2 Limited Action 10 <br /> 5 2 3 In-Situ Treatment 10 <br /> 5 2 4 Ex-Situ Treatm nt/Dis osal 11 <br /> 5 3 DEVELOPMENT OF REMEDIAL OPTIONS 12 <br /> 5 3 1 No-Action - Option 1 12 <br /> 5 3 2 Limited Action Groundwater Monitoring - Option 2 13 <br /> 5 3 3 Limited Action Groundwater Monitoring and Cap Maintenance - <br /> Option 3 14 <br /> 5 3 4 Bioventing - Option 4 14 <br /> 5 3 5 In-Situ Bioremediation - Option 5 16 <br /> 5 3 6 Excavation to Backzround Concentration and Off-Site Disposal - <br /> Option 6a 17 <br /> 5 3 7 Excavation to 1,000 mp-/kg m /kgandOff-Site Disposal - Option 6b 18 <br /> 5 3 8 Excavation to Background Concentration and, On-Site Thermal <br /> Treatment - Option 7a 18 <br /> 5 3 9 Ex avation to 1,000 mg/kg and On-Site Thermal Treatment - <br /> Ontion 7b 19 <br /> 6 0 EVALUATION OF REMEDIAL OPTIONS 21 <br /> 6 1 EVALUATION APPROACH AND DECISION CRITERIA 21 <br /> 6 2 REMEDIAL OPTION COST ESTIMATES AND NET PRESENT WORTH 23 <br /> 6 3 OVERALL SCORE AND RECOMMENDED REMEDIAL OPTION 25 <br /> SAC 127 10 i <br /> DAMES &.MOORE <br />