City of Malibu 23825 Stuart Ranch Road · Malibu, California · 90265-4861 Phone (310) 456-2489 · Fax (310) 317-1950 · www.malibucity.org GUIDELINES FOR THE PREPARATION OF ENGINEERING GEOLOGY AND GEOTECHNICAL ENGINEERING REPORTS AND PROCEDURES FOR REPORT SUBMITTAL Prepared by: Fugro Consultants, Inc., and City of Malibu Environmental Sustainability Department November 2013 Guidelines for Geotechnical Engineering Reports November 2013 1 INTRODUCTION ............................................................................................................................... 1 1.1 Purpose ............................................................................................................................................ 1 1.2 Definition of Roles .......................................................................................................................... 1 1.3 Applicable Codes ............................................................................................................................ 3 1.4 Courtesy Calling .............................................................................................................................. 3 1.5 Counter Hours and Appointments ................................................................................................... 3 2 PROCEDURES - SUBMITTAL OF DOCUMENTS ....................................................................... 4 2.1 Pre-Application Review .................................................................................................................. 4 2.2 Planning Stage Review .................................................................................................................... 4 2.3 Building and Grading Plan-Check Stage Review ........................................................................... 4 2.4 Submittal Requirements .................................................................................................................. 5 2.5 Plan-Check Requirements ............................................................................................................... 6 2.5.1 General Requirements ........................................................................................................... 6 2.5.2 Grading Plans ........................................................................................................................ 6 2.5.3 Retaining Walls ..................................................................................................................... 7 2.5.4 Swimming Pools ................................................................................................................... 7 2.6 Fire Rebuild Guidelines ................................................................................................................... 7 3 GUIDELINES ...................................................................................................................................... 7 3.1 General Guidelines .......................................................................................................................... 7 3.2 Types of Projects ............................................................................................................................. 8 3.2.1 New Construction .................................................................................................................. 8 3.2.2 Remodels ............................................................................................................................... 8 3.2.3 Additions to Existing Structures ........................................................................................... 9 3.2.4 Swimming Pools/Spas ........................................................................................................... 9 3.2.5 Repairs to Existing Structures/Remedial Grading .............................................................. 10 3.3 Types of Studies/Reports ............................................................................................................... 10 3.3.1 Feasibility/Preliminary Design/Design-Level Reports ....................................................... 10 3.3.2 Seismic Hazard Evaluation Reports .................................................................................... 11 3.3.3 Fault Rupture Hazard Reports ............................................................................................. 11 3.3.4 Geology Reconnaissance Reports ....................................................................................... 11 3.3.5 Geotechnical Engineering Reconnaissance Reports ........................................................... 12 3.3.6 Building/Grading Plan Review Reports .............................................................................. 12 3.3.7 Update Reports .................................................................................................................... 13 3.3.8 As-Built Reports .................................................................................................................. 13 3.3.9 As-Built Engineering Geology Reports .............................................................................. 14 3.4 Change of Consultant Letters ........................................................................................................ 14 3.5 Level of Professional Responsibility ............................................................................................. 14 3.6 Definitions ..................................................................................................................................... 15 3.6.1 Building Site ........................................................................................................................ 15 3.6.2 Restricted Use Area ............................................................................................................. 15 3.6.3 Habitable Structure .............................................................................................................. 15 i Guidelines for Geotechnical Engineering Reports November 2013 4 GUIDELINES FOR REPORTS ....................................................................................................... 15 4.1 Geotechnical Reference Standards ................................................................................................ 15 4.2 Report Organization ...................................................................................................................... 16 4.3 Maps, Plans, and Cross-Sections ................................................................................................... 17 4.3.1 Site Location Map ............................................................................................................... 17 4.3.2 Regional Geologic Hazard Maps ........................................................................................ 17 4.3.3 Site Geotechnical/Geologic Maps ....................................................................................... 17 4.3.4 Geotechnical Cross-Sections ............................................................................................... 18 4.4 Technical Documentation .............................................................................................................. 18 4.4.1 Previous Geotechnical Data ................................................................................................ 19 4.4.2 Identification and Mitigation of Risks ................................................................................ 19 4.4.3 References ........................................................................................................................... 20 4.4.4 Geotechnical Exploration Logs ........................................................................................... 20 4.4.5 Cone Penetrometer Data ...................................................................................................... 21 4.4.6 Plans and Cross-Sections .................................................................................................... 21 4.4.7 Computer-Assisted Analyses .............................................................................................. 21 5 ENGINEERING GEOLOGY GUIDELINES ................................................................................ 21 5.1 Excavation Permits ........................................................................................................................ 21 5.2 Field Exploration Program ............................................................................................................ 22 5.3 Seismic Hazard Evaluation ........................................................................................................... 23 5.3.1 Fault Rupture Evaluation .................................................................................................... 23 5.3.2 Ground Shaking ................................................................................................................... 25 5.3.3 CBC Seismic Design Factors .............................................................................................. 26 5.4 Engineering Geology Conclusions ................................................................................................ 27 5.5 Engineering Geology Recommendations ...................................................................................... 27 5.6 Subdividing Geologic/Geotechnical
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