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ERI 205505 R02 Tosco Service Station 5886 Stockton California September 25,2001 <br /> TABLE OF CONTENTS <br /> 1 0 INTRODUCTION 1 <br /> 1 I Setting 1 <br /> 20 SITE DESCRIPTION 2 <br /> 2 1 Background 2 <br /> 2 2 Regional Setting 4 <br /> 2 3 Site Geology and Hydrogeology 5 <br /> 3.0 FEASIBILITY STUDIES 5 <br /> 4.0 REMEDIAL ALTERNATIVES 6 <br /> 41 Natural Attenuation 6 <br /> 4 2 AS/SVE 6 <br /> 4 3 Periodic Purging of Groundwater 7 <br /> 4 4 Ozone Microspargmg 7 <br /> 5 0 RECOMMENDED CORRECTIVE ACTION 7 <br /> 5 1 "C-Sparge" TM Ozone Microsparging Remediation System 8 <br /> 5 2 Estimated Cleanup Time 8 <br /> 6.0 REFERENCES 8 <br /> PLATES <br /> 1 PLATE I SITE VICINITY MAP <br /> PLATE 2 GENERALIZED SITE PLAN <br /> PLATE 3 CROSS SECTION A-A' <br /> PLATE 4 CROSS SECTION B-B' <br /> PLATE 5 GROUNDWATER FLOW DIRECTION ROSE DIAGRAM <br /> PLATE 6 PROPOSED WELL LOCATIONS <br /> PLATE 7 TYPICAL SPARGE WELL DETAILS <br /> APPENDICES <br /> APPENDIX A SAN JOAQUIN COUNTY ENVIRONMENTAL HEALTH DIVISION, PUBLIC <br /> HEALTH SERVICES LETTERS DATED FEBRUARY 22, 2000 AND <br /> AUGUST 17, 2001 <br /> APPENDIX B BORING LOGS FOR GROUNDWATER MONITORING WELLS <br /> ■ MW 1 THROUGH MW 101SII/D, AND SOIL BORINGS BI, B8 THROUGH 1310, <br /> AND CPT1 THROUGH CPT3 <br /> APPENDIX C CUMULATIVE GROUNDWATER MONITORING AND SAMPLING DATA <br /> (Gettler-Ryan, Inc , June 6, 2001) <br /> APPENDIX D KVA "C-SPARGE" OZONE MICROSPARDING SYSTEM <br />