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4 � .fir YF <br /> i <br /> EXAMPLE OF CLOSURE REQUEST REPORT <br /> TABLE OF CONTENTS <br /> 1.0 INTRODUCTION <br /> 2.0 SITE BACKGROUND <br /> 2.1 Site Description <br /> a 2.2 Regional Geology and Hydrogeology <br /> 2.3 Local Geology and Hydrogeology <br /> 2.4 Sensitive Receptor Survey <br /> 2,5 Conduit Survey <br /> -3-.0 -_'PREVIOUS`INVESTIGATIIONS - <br /> 4.0 HYDROCARBON DISTRIBUTION <br /> F <br /> 4.1 ' Hydrocarbon Distribution in Soil <br /> 4.2 Hydrocarbon Distribution in Groundwater <br /> 5.0 RISK ASSESSMENT l <br /> 5.1 Tier 1 Risk Evaluation <br /> 5.2 Conceptual Site Model <br /> 5.3 Results of Tier 1 Evaluation <br /> 6.0 LOW RISK GROUNDWATER CASE CLOSURE i <br /> 6.1 Leak Has Stoppedk- Ongoing Sources Removed I <br /> 6.2 Site is Adequately Characterized <br /> 6.3 Dissolved Hydrocarbon Plume Is Not Migrating <br /> 6.4 Sensitive Receptors & Water Wells Not Likely to be Impacted <br /> 6.5 No Significant.Riskito Human Health or Environment <br /> 7.0 CONCLUSIONS AND RECOMMENDATIONS <br /> +' Ei <br /> FIGURES <br /> IIf <br /> 1. Vicinity Map <br /> 2. Site Plan . f <br /> 3.- --Groundwater Elevation Contours:- <br /> y 4. ' 'Hydrocarbon Concentration Contours <br /> 5. Trend Analysis Graprhs an`d Plots <br /> 6. Conceptual Site Model Exposure Pathway <br /> TABLES <br /> 1. Groundwater Elevation and Analytical Data . <br /> 2. Soil analytical Data ! <br /> 3. Monitoring Well Construction Details <br /> 4. 35% UCL Calculations r <br /> APPENDICES <br /> A. Boring and Well Logs <br /> B. Sensitive Receptor Survey <br /> ' C. Trend Analysis Data <br /> D. Closure Summary Form <br /> California Environmental Protection Agency <br /> C,1Recy kd Piper <br />