Laserfiche WebLink
Atlantic Richfield Company Page► <br /> ARCO Station No 4932,Stockton,California August 29 2002 <br /> • TABLE OF CONTENTS <br /> 1.0 INTRODUCTION...................................................................,...................................1 <br /> 2.0 SITE BACKGROUND ...............................................................................................2 <br /> 21 Site Setting 2 <br /> 22 Summary of Previous Investigations 2 <br /> 23 Geology and Hydrogeology 5 <br /> 24 Updated Sensitive Receptor Survey 6 <br /> 25 Utility Survey 6 <br /> 3.0 SUMMARY OF CURRENT ACTIVITIES..............................................................7 <br /> 3 1 Additional Site Assessment 7 <br /> 3 11 Description of Site Assessment Activities 7 <br /> 3 12 Subsurface Conditions 8 <br /> 3 13 Soil Sampling and Analysis 8 <br /> 3 14 Well Development, Sampling and Analysis, and Surveying 8 <br /> 3 14 1 Groundwater Flow Direction 9 <br /> 3 1 5 Stockpiled Soil and Rinsate Water 9 <br /> 3 16 Summary of Findings 9 <br /> 317 Conclusions 10 <br /> 4.0 EXTENT OF PETROLEUM HYDROCARBON IMPACTS..............................11 <br /> 41 Extent of Adsorbed Petroleum Hydrocarbons 11 <br /> 42 Extent of Dissolved Petroleum Hydrocarbons 11 <br /> 5.0 REMEDIAL FEASIBILITY TESTING AND INTERIM REMEDIATION......12 <br /> 5 1 Results of DPE Feasibility Testing 12 <br /> 5 1 1 Summary of Findings 13 <br /> 512 Conclusions 13 <br /> 52 Aquifer Pumping Test 13 <br /> 5 2 1 Summary of Findings 13 <br /> 5 2 2 Conclusions 14 <br /> 53 Batch Extraction/Intenin Remediation 14 <br /> 6.0 EVALUATION OF REMEDIAL ALTERNATIVES............................................14 <br /> 61 Evaluation of Remedial Feasibility Testing and Remediation Goals 14 <br /> 62 Evaluation of Remedial Alternatives 15 <br /> 63 Remedial Alternative Recommendation 15 <br /> 64 Conceptual Remedial Alternative Design 16 <br /> 65 Process Flow 16 <br /> I\ARCO\49321PAR\PAR doe <br />