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Corrective Action Plan <br /> Montgomery Ward Auto Service Center, Stockton, CA <br /> TABLE OF CONTENTS <br /> Pale <br /> 1 0 INTRODUCTION 1 <br />' 1 1 Purpose 1 <br /> 20 BACKGROUND 2 <br /> 2 1 Montgomery Ward Site 2 <br /> 22 Former Unocal Site 4 <br />' 2 3 San Joaquin Delta College Irrigation Well 4 <br /> 24 Other Off-Site Wells 6 <br />' 3 0 CHEMICALS OF POTENTIAL CONCERN 7 <br /> 3 1 Extent of Contamination 7 <br /> 40 EXPOSURE PATHWAYS 9 <br /> 5 0 REMEDIAL ACTION OBJECTIVES 10 <br /> 5 1 Proposed Soil Cleanup Levels 10 <br /> 5 2 Proposed Ground Water Cleanup Levels 10 <br /> 60 IDENTIFICATION AND SCREENING OF TECHNOLOGIES 11 <br /> 61 Criteria Used for Screening Remedial Alternatives 11 <br />' <br /> 62 Screening Methodology and Weighting of Criteria 11 <br /> 6 3 Soil Remediation Alternative Screening 12 <br /> 64 Ground Water Remedial Alternative 16 <br />' 70 SELECTION OF REMEDIAL ALTERNATIVES 20 <br /> 71 Soil 20 <br /> 72 Ground Water 20 <br /> 80 REMEDIAL SYSTEM 21 <br /> 81 System Overview 21 <br /> 82 Design Parameters 21 <br /> 8 3 System Components 22 <br /> $ F+Sy stein Startup 26 <br /> 8 5 Operation and Maintenance 27 <br />' 90 VERIFICATION SAMPLING 30 <br /> 91 Vapor Sampling/Testing 30 <br />' <br /> 92 Soil Sampling/Testing 30 <br /> 93 Ground Water Sampling/Testing 30 <br /> Project No 1232 <br /> tSAB WORD I232CAP <br />