Guidelines for the Preparation of Engineering Geology and Geotechnical Engineering Reports and Procedures for Report Submittal

Guidelines for the Preparation of Engineering Geology and Geotechnical Engineering Reports and Procedures for Report Submittal

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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