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TABLE OF CONTENTS <br /> Page <br /> REMARKS AND SIGNATURES <br /> EXECUTIVE SUMMARY <br /> 1.0 INTRODUCTION 1 <br /> 2.0 BACKGROUND INFORMATION 1 <br /> 2 1 Site Location and Description 1 <br /> 2 2 Previous Work 1 <br /> 3.0 DRILLING AND SAMPLING PROCEDURES 2 <br /> 3 1 Drilling and Sampling--First Phase 2 <br /> 3 2 Drilling and Samphng--Second Phase 3 <br /> 3 3 Water Sampling 4 <br /> 3 3 1 Groundwater Morutonng--August 1996 4 <br /> 3 3 2 Groundwater Morutonng--October 1996 4 <br />. 4 0 SITE GEOLOGY 4 <br /> 4 1 Subsurface Stratigraphy 4 <br /> 4 1 1 Modesto Formation 5 <br /> 4 12 Riverbank Formation 6 <br /> 4 13 Facies Maps 6 <br /> 4 2 Subsurface Structure 7 <br /> 4 3 Hydrogeology 7 <br /> 4 3 1 Modesto Formation Aquifer 8 <br /> 4 3 2 Modesto Formation Aquitard 8 <br /> 4 3 3 Riverbank Formation Aquifer 8 <br /> 4 4 Soil Chenustry and Bacterial Activity 9 <br /> 5.0 ASSESSMENT OF SOIL AND GROUNDWATER CONTAMINATION 10 <br /> 5 1 Field Evidence of Contamintation 10 <br /> 5 2 Laboratory Evidence of Contamination 10 <br /> 5 2 1 Soil Contamination 10 <br /> 5 2 2 Groundwater Contamination 11 <br /> 5 3 Vertical Extent of Soil Contamination 12 <br /> 5 4 Lateral Extent of Soil Contamination 13 <br /> 5 5 Volume of Contaminated Soil 13 <br /> 5 6 Estimated Volume of Hydrocarbon Contaminants 14 <br />