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Pilot Testing Report and Conceptual Corrective Action Plan July 15, 1994 <br /> Manna Pro, 4004 South EI Dorado, Stockton, CA 11 <br />' CONTENTS <br />' 1 0 INTRODUCTION 1 <br /> 11 Goals and Objectives 1 <br />' 1 2 Scope of Work 2 <br /> 20 SITE BACKGROUND 2 <br />' <br /> 21 Summary of Previous Investigations 2 <br /> 21 1 Preliminary Site Assessment, WHF, Environmental Consultants, Inc 2 <br /> 212 Underground Storage Tank Removal, WHF, Environmental <br /> Consultants, Inc 3 <br />' 2 1 3 Re-Excavation Work, WHF, Environmental Consultants, Inc 3 <br /> 2 1 4 Slot Sampling of Excavation, ERM-West, Inc 3 <br /> 2 1 5 Monitoring Wells MW-1 through MW-6 4 <br />' 2 1 6 Monitoring Wells MW-7 through MW-10 4 <br /> 22 Summary of Recent Investigation and Pilot Testing 4 <br /> 2 2 1 Extraction Well Installation 5 <br /> 222 Observation Well Installation 5 <br /> 30 PHYSICAL CHARACTERIZATION 6 <br /> 31 Topography 7 <br /> 32 Hydrogeologic Conditions 7 <br /> 33 Physical Characterization Summary 8 <br />' <br /> 40 ANALYTICAL CHARACTERIZATION 9 <br /> 41 Adsorbed-Phase Hydrocarbons 9 <br /> 4 1 1 Distribution of Adsorbed-Phase Hydrocarbons 9 <br /> 412 Adsorbed-Phase Hydrocarbon Mass Estimate 9 <br />' <br /> 42 Dissolved-Phase Hydrocarbons 10 <br /> 4 2 1 Distribution of Dissolved-Phase Hydrocarbons 10 <br /> 422 Dissolved-Phase Hydrocarbon Mass Estimate 10 <br />' 43 Analytical Summary 11 <br /> 50 PILOT TEST RESULTS 11 <br /> 51 Aquifer Pumping Test 11 <br />' 511 Methodology 11 <br /> 5 1 2 Field Activities 13 <br /> 513 Results 14 <br />' 5 1 4 Data Analysis 14 <br /> 52 Combined Groundwater Pumping and High-Vacuum Extraction Test 16 <br /> 5 2 1 Methodology 16 <br />' <br /> 522 Field Activities 17 <br /> 523 Results 18 <br /> 524 Data Analysis 18 <br /> 2819R034 070 <br /> GROUNDWATER <br /> TECHNOLOGY,INC <br />