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TABLE OF CONTENTS <br /> 1. INTRODUCTION....................................................................................................................................1 <br /> 2. SITE DESCRIPTION ..............................................................................................................................2 <br /> 2.1 Geology and Hydrogeology.....................................................................................................2 <br /> 3. PREVIOUS ENVIRONMENTAL WORK..............................................................................................3 <br /> 4. FIELD ACTIVITIES................................................................................................................................3 <br /> 4.1 Pre-field Goals..........................................................................................................................3 <br /> 4.2 Pre-field Activities ...................................................................................................................3 <br /> 4.3 Soil Borings—Collection of Soil and Water Samples..............................................................4 <br /> 4.3.1 Soil Sampling..............................................................................................................4 <br /> 4.3.2 Grab Groundwater Sampling.......................................................................................5 <br /> 5. RESULTS.................................................................................................................................................5 <br /> 5.1 Soil Sample Analyses...............................................................................................................5 <br /> 5.1.1 Soil Sample Analytical Results...................................................................................5 <br /> 5.2 Grab Groundwater Sample Analyses.......................................................................................6 <br /> 5.2.1 Grab Groundwater Sampling Analytical Results............... ..................... ..............6 <br /> 5.2.2 Water Supply Well Sampling Analytical Results........................................................7 <br /> 5.2.3 Investigation Derived Waste.......................................................................................8 <br /> 6. DISCUSSION..........................................................................................................................................8 <br /> 6.1 Section SB-1 through SB-7—Area West of Interstate 205......................................................8 <br /> 6.2 Section SB-8 through.SB-16 -Area between Lammers Road and Former <br /> NicholawProperty....................................................................................................................8 <br /> 6.3 Section SB-17 through SB-26 -Area between Former Nicholaw and <br /> Caldron's Store.........................................................................................................................9 <br /> 6.4 Section SB-27 through SB-35 -Area between Caldron's Store and Area of <br /> PG&E Investigation ...............................................................................................................10 <br /> 6.5 Water Supply Wells................................................................................................................11 <br /> 6.6 Cross Sections and West Byron Road Bisects.........................................................................11 <br /> 7. Summary/Conclusions ...........................................................................................................................11 <br /> 7.1 Recommendations..................................................................................................................12 <br /> 8. References..............................................................................................................................................13 <br /> FIGURES <br /> Figure 1 Site Vicinity Map <br /> Figure 2a,2b Site Maps with Boring Locations <br /> Figure 3a- 3d Soil Concentration Maps <br /> Figure 4a,4b Grab Groundwater Concentration Maps <br /> i <br />