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Weston Solutions, Inc. <br /> Remedial Action Work Plan for the San Joaquin County Human Services Agency Site—Stockton, California <br /> TABLE OF CONTENTS <br /> Section Page <br /> 1 INTRODUCTION..............................................................................................................1-1 <br /> 1.1 SITE LOCATION AND DESCRIPTION................................................................. 1-2 <br /> 2 PREVIOUS INVESTIGATIONS......................................................................................2-1 <br /> 2.1 SITE HISTORY, INVESTIGATIONS AND REMOVALS.....................................2-1 <br /> 2.2 LOW-RISK CLOSURE REQUEST AND RECENT INVESTIGATIONS .............2-5 <br /> 3 GEOLOGY AND HYDROGEOLOGY...........................................................................3-1 <br /> 3.1 LOCAL GEOLOGIC INFORMATION....................................................................3-1 <br /> 3.2 REGIONAL GEOLOGIC INFORMATION.............................................................3-3 <br /> 4 NATURE AND EXTENT OF RESIDUAL CONTAMINATION.................................4-1 <br /> 4.1 SOIL AND SOIL GAS..............................................................................................4-1 <br /> 4.2 GROUNDWATER....................................................................................................4-2 <br /> 5 PROPOSED CORRECTIVE ACTIONS GOALS/OBJECTIVES ...............................5-1 <br /> 6 PROPOSED IMPLEMENTATION PLAN.....................................................................6-1 <br /> 6.1 HEALTH AND SAFETY PLAN..............................................................................6-1 <br /> 6.2 PERMITS...................................................................................................................6-1 <br /> 6.3 UTILITY CLEARANCE...........................................................................................6-1 <br /> 6.4 SITE PREPARATION...............................................................................................6-2 <br /> 6.5 TREATMENT AMENDMENT ................................................................................6-2 <br /> 6.6 TREATMENT AMENDMENT INJECTION...........................................................6-2 <br /> 6.7 GROUNDWATER PERFORMANCE MONITORING AND REPORTING..........6-4 <br /> 6.8 CONTINGENCY ACTIONS ....................................................................................6-5 <br /> 6.9 WASTE MANAGEMENT........................................................................................6-6 <br /> 7 REFERENCES...................................................................................................................7-1 <br /> APPENDIX A MONITORING AND REPORTING PROGRAM <br /> 1 Febraary 2021 <br />