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KLE/NFELOER <br /> �. Brrght People_flight SduNons. <br /> TABLE OF CONTENTS <br /> Section Page <br /> 1 INTRODUCTION.............................................................................................................1 <br /> 1.1 GENERAL............................................................................................................1 <br /> 1.2 PROJECT DESCRIPTION...................................................................................1 <br /> 1.3 PURPOSE AND SCOPE OF SERVICES.............................................................2 <br /> 2 FIELD EXPLORATION AND LABORATORY TESTING.................................................3 <br /> 2.1 FIELD EXPLORATION ........................................................................................3 <br /> 2.1.1 Pre-Field Activities....................................................................................3 <br /> 2.1.2 Subsurface Explorations...........................................................................3 <br /> 2.1.3 Sampling Procedures...............................................................................4 <br /> 2.1.4 Percolation Testing...................................................................................5 <br /> 2.2 LABORATORY TESTING....................................................................................5 <br /> 3 GEOLOGIC SETTING.....................................................................................................6 <br /> 3.1 REGIONAL GEOLOGY........................................................................................6 <br /> 3.2 AREA AND SITE GEOLOGY...............................................................................6 <br /> 4 SITE AND SUBSURFACE CONDITIONS.......................................................................8 <br /> 4.1 SURFACE CONDITIONS ....................................................................................8 <br /> 4.2 SUBSURFACE CONDITIONS .............................................................................8 <br /> 4.3 GROUNDWATER................................................................................................8 <br /> 4.4 VARIATIONS IN SUBSURFACE CONDITIONS ..................................................9 <br /> 5 CONCLUSIONS AND RECOMMENDATIONS .............................................................10 <br /> 5.1 GENERAL..........................................................................................................10 <br /> 5.2 SITE PREPARATION AND EARTHWORK CONSTRUCTION...........................10 <br /> 5.2.1 General ..................................................................................................10 <br /> 5.2.2 Stripping and Grubbing...........................................................................10 <br /> 5.2.3 Disturbed Soil, Undocumented Fill and Subsurface Obstructions...........11 <br /> 5.2.4 Scarification and Compaction.................................................................11 <br /> 5.2.5 Engineered Fill .......................................................................................12 <br /> 5.2.5.1 Onsite Materials....................................................................12 <br /> 5.2.5.2 Import and Non-Expansive Fill Requirements.......................12 <br /> 5.2.5.3 Import and Non-Expansive Fill Compaction Criteria..............13 <br /> 5.2.6 Anticipated Excavation Conditions..........................................................13 <br /> 5.2.6.1 General.................................................................................13 <br /> 5.2.6.2 Shallow Trenches .................................................................13 <br /> 5.2.7 Temporary Excavations..........................................................................14 <br /> 5.2.7.1 General.................................................................................14 <br /> 5.2.7.2 Excavation and Slopes..........................................................14 <br /> 5.2.8 Wet Weather Considerations..................................................................14 <br /> 5.2.9 Trench Backfill........................................................................................15 <br /> 5.2.10 Pipe Bedding and Pipe Zone Backfill Placement....................................15 <br /> 5.2.11 Filter Fabric Envelope.............................................................................16 <br /> 5.3 2019 CBC SEISMIC DESIGN PARAMETERS...................................................16 <br /> 5.4 LIQUEFACTION ................................................................................................17 <br /> 5.5 STRUCTURE FOUNDATION DESIGN..............................................................18 <br /> 5.5.1 Allowable Bearing Pressure....................................................................18 <br /> 20210067.001A/ST020R111447 Page iii of iv May 11, 2020 <br /> ©2020 Kleinfelder www.kleinfelder.com <br />