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625 Cypress Avenue <br />Geotechnical Investigation <br /> <br /> <br /> <br /> <br />TABLE OF CONTENTS <br /> <br />1. PURPOSE AND SCOPE ....................................................................................................................... 1 <br />2. SITE AND PROJECT DESCRIPTION ..................................................................................................... 2 <br />3. GEOLOGIC SETTING .......................................................................................................................... 2 <br />4. SOIL AND GEOLOGIC CONDITIONS ................................................................................................... 3 <br />4.1 Artificial Fill ............................................................................................................................ 3 <br />4.2 Younger Alluvium ................................................................................................................... 3 <br />5. GROUNDWATER ............................................................................................................................... 3 <br />6. GEOLOGIC HAZARDS ........................................................................................................................ 4 <br />6.1 Surface Fault Rupture ............................................................................................................ 4 <br />6.2 Seismicity ............................................................................................................................... 5 <br />6.3 Site-Specific Ground Motion Hazard Analysis........................................................................ 6 <br />6.3.1 Probabilistic Seismic Hazard Analysis ....................................................................... 6 <br />6.3.2 Deterministic Seismic Hazard Analysis ..................................................................... 7 <br />6.3.3 Site-Specific Response Spectrum .............................................................................. 7 <br />6.3.4 Site-Specific Seismic Design Criteria ......................................................................... 8 <br />6.3.5 Site-Specific Peak Ground Acceleration .................................................................... 9 <br />6.3.6 Deaggregated Seismic Source Parameters ............................................................. 10 <br />6.4 Liquefaction Potential .......................................................................................................... 10 <br />6.5 Seismically-Induced Settlement ........................................................................................... 12 <br />6.6 Slope Stability....................................................................................................................... 12 <br />6.7 Earthquake-Induced Flooding .............................................................................................. 12 <br />6.8 Tsunamis, Seiches, and Flooding ......................................................................................... 13 <br />6.9 Oil Fields & Methane Potential ............................................................................................ 13 <br />6.10 Subsidence ........................................................................................................................... 13 <br />7. CONCLUSIONS AND RECOMMENDATIONS .................................................................................... 14 <br />7.1 General ................................................................................................................................. 14 <br />7.2 Soil and Excavation Characteristics ...................................................................................... 16 <br />7.3 Minimum Resistivity, pH, and Water-Soluble Sulfate .......................................................... 17 <br />7.4 Grading ................................................................................................................................. 18 <br />7.5 Existing Foundations ............................................................................................................ 20 <br />7.6 New Foundation Design ....................................................................................................... 21 <br />7.7 Lateral Design ...................................................................................................................... 23 <br />7.8 Concrete Slabs-on-Grade ..................................................................................................... 23 <br />7.9 Preliminary Pavement Recommendations .......................................................................... 25 <br />7.10 Temporary Excavations ........................................................................................................ 27 <br />7.11 Trench Shoring ..................................................................................................................... 27 <br />7.12 Stormwater Infiltration ........................................................................................................ 30 <br />7.13 Surface Drainage .................................................................................................................. 32 <br />7.14 Plan Review .......................................................................................................................... 32 <br /> LIMITATIONS AND UNIFORMITY OF CONDITIONS <br /> <br />LIST OF REFERENCES <br />