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Site Assessment Report <br /> Former Texaco Service Stationa s F D <br /> Chevron Site ID 309075 <br /> March 18, 2010 APR I I e U IO <br /> ENVIRON r i' HEALTH <br /> TABLE OF CONTENTS FERIT1T/SED 0S <br /> 1.0 INTRODUCTION ................................................................................................................ 1 <br /> 2.0 BACKGROUND INFORMATION........................................................................................ 1 <br /> 2.1 Site History..................................................................:......................................... 1 <br /> 2.2 Regional Geology/Hydrogeology.......................................................................... 2 <br /> 2.3 Site Geology......................................................................................................... 2 <br /> 3.0 SITE ASSESSMENT ACTIVITIES.........::........................................................................... 2 <br /> 3.1 Soil Borings.....................................:...................................................................... 3 <br /> 3.1.1 Soil Sampling, Screening, and Analysis ............................................................... 3 <br /> L3.2 Groundwater Monitoring Well Installation ............................................................. 4 <br /> 3.2.1 Shallow Water-Bearing Zone............................................:.................................... 4 <br /> 3.2.2 Deep Water-Bearing Zone..............................:..................................................... 4 <br /> 3.2.3 Groundwater Monitoring Well Development and Sampling................................... 4 <br /> 3.2.4 Quality Assurance/Quality Control Plan...................... ..... 5 <br /> 3.3 Waste Disposal ...................................................................................................... 6 <br /> r3.4 Well Survey............................................................................................................ 6 <br /> 1. 4.0 RESULTS........................::..................:.............................................................................. 6 <br /> T4.1 Soil Chemistry...................................................................................................... 6 <br /> 4.2 Groundwater Chemist 6 <br /> 4.3 Site Conceptual Model ........._................. ............................................................. 7 <br /> . . <br /> 5.0 CONCLUSIONS ...................:...............:............................................................................. 8 <br /> 6.0 RECOMMENDATIONS....................................................................................................... 8 <br /> Lr ` <br /> L <br /> \\CA5FP\Data\Aproject\ENV\CHEVRON\309075\6 Deliverables\Reports\DG Wells.Assessment%Assessment Repor_4741010950.doc j <br />