SAN BERNARDINO COUNTYWIDE PLAN DRAFT PEIR COUNTY OF SAN BERNARDINO Appendices Appendix G: Safety Background Report June 2019 SAN BERNARDINO COUNTYWIDE PLAN DRAFT PEIR COUNTY OF SAN BERNARDINO Appendices This page intentionally left blank. PlaceWorks GENERAL PLAN SAFETY TECHNICAL REPORT SAN BERNARDINO COUNTY Appendix County of San Bernardino Safety Background Report 4/5/2017 Prepared by: PlaceWorks In Collaboration with Dudek on Fire Hazards This BackgroundDRAFT Report was prepared to inform the Countywide Plan and is not intended to be continuously updated. May 2016 PlaceWorks G1-1 DRAFT G1-2 COUNTYWIDE PLAN SAFETY BACKGROUND REPORT SAN BERNARDINO COUNTY Table of Contents Table of Contents 1. PUBLIC SAFETY CONTEXT ....................................................................................................................... 1-1 INTRODUCTION ........................................................................................................................... 1-1 PURPOSE AND ORGANIZATION OF REPORT ................................................................ 1-2 REPORT FINDINGS ...................................................................................................................... 1-3 1.3.1 Seismic and Geologic Hazards ......................................................................................... 1-3 1.3.2 Flood Hazards ..................................................................................................................... 1-4 1.3.3 Hazardous Materials ........................................................................................................... 1-5 1.3.4 Fire Hazards ......................................................................................................................... 1-6 1.3.5 Emergency Preparedness ................................................................................................... 1-7 ADDITIONAL ISSUES TO EXPLORE .................................................................................... 1-7 2. SEISMIC AND GEOLOGIC HAZARDS ........................................................................................................ 2-1 INTRODUCTION ........................................................................................................................... 2-1 2.1.1 Regulatory Setting ............................................................................................................... 2-2 2.1.2 Important Terms ................................................................................................................. 2-7 2.1.3 Geologic Setting ................................................................................................................ 2-10 2.1.4 Recent Geologic and Seismic Events ............................................................................ 2-11 SEISMIC AND GEOLOGIC HAZARDS ................................................................................ 2-13 2.2.1 Ground Shaking ................................................................................................................ 2-13 2.2.2 Later Quaternary Surface Fault Rupture ....................................................................... 2-14 2.2.3 Liquefaction ....................................................................................................................... 2-19 2.2.4 Landslides & Slope Instability ......................................................................................... 2-20 2.2.5 Corrosive Soils ................................................................................................................... 2-23 2.2.6 Settlement/Subsidence..................................................................................................... 2-24 2.2.7 Expansive and Collapsible Soil ....................................................................................... 2-27 2.2.8 Hazardous Minerals .......................................................................................................... 2-28 IMPLEMENTING AGENCIES ................................................................................................. 2-29 3. FLOODING HAZARDS ................................................................................................................................ 3-1 INTRODUCTION ........................................................................................................................... 3-1 3.1.1 Regulatory Setting ............................................................................................................... 3-2 3.1.2 Important Terms ................................................................................................................. 3-6 3.1.3 Recent Flooding Events ..................................................................................................... 3-9 3.1.4 Hydrologic Setting ............................................................................................................ 3-11 3.1.5 Assets At Risk From Flooding ....................................................................................... 3-12 FLOODING HAZARDS ............................................................................................................. 3-15 3.2.1 Dam Inundation ................................................................................................................ 3-15 3.2.2 Levee Inundation .............................................................................................................. 3-18 3.2.3 Riverine Flooding .............................................................................................................. 3-29 3.2.4 Urban Flooding ................................................................................................................. 3-33 3.2.5 Alluvial Fans ...................................................................................................................... 3-35 3.2.6 Debris and Mud Flows ..................................................................................................... 3-36 DRAFTIMPLEMENTING AGENCIES ................................................................................................. 3-39 April 2017 PlaceWorks | Page i G1-3 COUNTYWIDE PLAN SAFETY BACKGROUND REPORT SAN BERNARDINO COUNTY Table of Contents 4. HAZARDOUS MATERIALS ......................................................................................................................... 4-1 INTRODUCTION ........................................................................................................................... 4-1 4.1.1 Regulatory Setting ............................................................................................................... 4-2 4.1.2 Important Terms ................................................................................................................. 4-7 4.1.3 Recent Hazardous Materials Incidents ............................................................................ 4-9 POTENTIAL HAZARDS ............................................................................................................ 4-11 4.2.1 Toxic Chemical Releases .................................................................................................. 4-12 4.2.2 Superfund National Priority List .................................................................................... 4-13 4.2.3 Formerly Used Defense Sites .......................................................................................... 4-14 4.2.4 GroundWater Contamination ......................................................................................... 4-15 4.2.5 Radioactive Waste ............................................................................................................. 4-17 4.2.6 Hazardous Material Transport ........................................................................................ 4-18 4.2.7 Solid Waste Disposition ................................................................................................... 4-22 IMPLEMENTING AGENCIES ................................................................................................. 4-27 5. FIRE HAZARDS ........................................................................................................................................... 5-1 INTRODUCTION ........................................................................................................................... 5-1 5.1.1 Regulatory Setting ............................................................................................................... 5-2 5.1.2 Important Terms ................................................................................................................. 5-6 5.1.3 Recent Fire Hazards ........................................................................................................... 5-9 WILDLAND FIRE HAZARDS .................................................................................................. 5-14 5.2.1 Geographic Setting ........................................................................................................... 5-14 5.2.2 Assets At Risk .................................................................................................................... 5-19 5.2.3 Communities at Risk ........................................................................................................ 5-21 URBAN FIRE HAZARDS ..........................................................................................................