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Feasibility study/Corrective Action Pian 11 <br /> The Drake Property,26485 Thornton Road Thornton California November 26 1996 <br /> CONTENTS <br /> 1 0 INTRODUCTION 1 <br /> 2 0 BACKGROUND 1 <br /> 21 Site History 1 <br /> 22 Site Conditions 2 <br /> 23 Results of Soil Assessment 2 <br /> 24 Results of Groundwater Assessment 3 <br /> 3 0 SITE LITHOLOGY AND HYDROGEOLOGY 4 <br /> 4 0 REMEDIAL ACTION ALTERNATIVES 6 <br /> 41 Excavation 5 <br /> 42 Additional Assessment and Groundwater Monitoring and Sampling 5 <br /> 5 0 REQUEST FOR "NO FURTHER ACTION" 6 <br /> 6 0 CONCLUSIONS AND RECOMMENDATIONS 8 <br /> 7 0 REFERENCES 9 <br /> Figures <br /> 1 Site Location Map <br /> 2 Site Summary Map <br /> 3 Site Map Showing Distribution of Hydrocarbons in Soil <br /> 4 Site Map Showing Distribution of Hydrocarbons in Groundwater <br /> Tables <br /> 1 Historic Soil Analybcal Results <br /> 2 Additional Groundwater Analybcal Results <br /> 3 Historic Groundwater Analytical and Monitoring Data <br /> 4 Well Inventory <br /> 5 Maximum Calculated Groundwater Concentrations from Leaching/Partitioning <br /> 6 California Tier 1 Risk-Based Screening Level (RBSL) Look-Up Table (ASTM E 1739-95) <br /> Appendices <br /> A Sample Calculations of Hydrocarbon Volume in Soil and Groundwater <br />• <br /> 0191 FEA RPT(Miu 15) <br /> FLUOR DANIEL GTI <br />