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MainPlace Mall Transformation Project 12126.001 <br />TABLE OF CONTENTS <br />Section Paqe <br />1.0 INTRODUCTION.................................................................................................. 1 <br />1.1 Site Description and Proposed Development ............................................ 1 <br />1.2 Scope of Work........................................................................................... 2 <br />1.3 Previous Investigations.............................................................................. 2 <br />2.0 GEOLOGIC SETTING AND SUBSURFACE CONDITIONS ................................ 3 <br />2.1 Geologic Setting........................................................................................ 3 <br />2.2 Local Geologic Units and Subsurface Conditions ...................................... 3 <br />2.2.1 Undocumented Artificial Fill:(Afu)................................................... 3 <br />2.2.2 Quaternary Age Young Alluvial Fan Deposits: (Qyf) ....................... 4 <br />2.3 Groundwater..............................................................................................4 <br />3.0 GEOLOGIC AND SEISMIC HAZARDS............................................................... 6 <br />3.1 <br />Surface Fault Rupture................................................................................ <br />6 <br />3.2 <br />Seismic Ground Shaking........................................................................... <br />6 <br />3.3 <br />Liquefaction............................................................................................... <br />8 <br />3.4 <br />Seismically -Induced Settlement................................................................. <br />9 <br />3.5 <br />Seismically -Induced Lateral Spread.......................................................... <br />9 <br />3.6 <br />Seismically -Induced Landslides.................................................................9 <br />3.7 <br />Flooding...................................................................................................10 <br />3.8 <br />Seiches and Tsunamis............................................................................. <br />10 <br />3.9 <br />Slope Stability and Landslides................................................................. <br />11 <br />3.10 <br />Soil Corrosion.......................................................................................... <br />11 <br />3.11 <br />Soil Expansion......................................................................................... <br />11 <br />3.12 <br />Erosion.....................................................................................................12 <br />3.13 <br />Methane...................................................................................................12 <br />3.14 <br />Regional Subsidence............................................................................... <br />13 <br />3.15 <br />Summary of Geologic and Seismic Hazards Review ............................... <br />13 <br />LIST OF ILLUSTRATIONS AND APPENDICES <br />Figure 1 — Site Location Map <br />Figure 2 — Boring Location Map <br />Figure 3 — Regional Geology Map <br />Figure 4 — Regional Fault and Historic Seismicity Map <br />Figure 5 — Seismic Hazard Map <br />Figure 6 — Flood Hazard Zone Map <br />Figure 7 — Dam Inundation Map <br />Rear of Text <br />Rear of Text <br />Rear of Text <br />Rear of Text <br />Rear of Text <br />Rear of Text <br />Rear of Text <br />�00 <br />Leighton <br />