04 ATTACHMENT 6 - Laserfiche WebLink

TABLE OF CONTENTS 1. PURPOSE AND SCOPE .................................................................................................................................... 1 2. SITE CONDITIONS AND PROJECT DESCRIPTION ............................................................................................ 1 3. GEOLOGIC SETTING ........................................................................................................................................ 2 4. GEOLOGIC HAZARDS ....................................................................................................................................... 2 4.1 Faulting and Seismicity ....................................................................................................................... 2 4.2 Surface Fault Rupture ......................................................................................................................... 3 4.3 Ground Shaking ................................................................................................................................... 3 4.4 Liquefaction ......................................................................................................................................... 3 4.5 Landslides............................................................................................................................................ 4 4.6 Tsunamis and Seiches ........................................................................................................................ 4 5. SOIL AND GROUNDWATER CONDITIONS ........................................................................................................ 5 5.1 Alluvium ............................................................................................................................................... 5 5.2 Orinda Formation ................................................................................................................................. 5 5.3 Groundwater ........................................................................................................................................ 5 6. CONCLUSIONS AND RECOMMENDATIONS .................................................................................................... 6 6.1 General ................................................................................................................................................ 6 6.2 Seismic Design Criteria ....................................................................................................................... 6 6.3 Soil and Excavation Characteristics .................................................................................................... 8 6.4 Materials for Fill ................................................................................................................................... 8 6.5 Grading ................................................................................................................................................ 8 6.6 Shallow Foundation Recommendations ............................................................................................. 9 6.7 Concrete Slabs-on-Grade ................................................................................................................. 10 6.8 Moisture Protection Considerations ................................................................................................. 11 6.9 Temporary Excavations .................................................................................................................... 11 6.10 Retaining Wall Design ...................................................................................................................... 11 6.11 Underground Utilities ........................................................................................................................ 12 6.12 Pavement Recommendations .......................................................................................................... 13 6.13 Surface Drainage .............................................................................................................................. 14 7. FURTHER GEOTECHNICAL SERVICES ......................................................................................................... 16 7.1 Plan and Specification Review ......................................................................................................... 16 7.2 Testing and Observation Services .................................................................................................... 16 LIMITATIONS AND UNIFORMITY OF CONDITIONS FIGURES Figure 1, Vicinity Map Figure 2, Site Plan APPENDIX A – FIELD INVESTIGATION Figure A1, Key to Boring Logs Figures A2 through A8, Logs of Exploratory Borings B1 through B7 APPENDIX B – LABORATORY TESTING Table B-I, Summary of Laboratory Atterberg Limits Test Results Table B-II, Summary of Laboratory Grain Size Analysis – No. 200 Wash Test Results Table B-III, Summary of Laboratory Expansion Index Test Results Figure B1, Summary of Laboratory Particle Size Analyses Figure B2, Summary of Laboratory Unconfined Compressive Strength Test Results APPENDIX C – SOIL BORING LOGS AND LABORATORY TESTING BY OTHERS LIST OF REFERENCES