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Geotechnical Engineering Report Page 1 January 8,2021 <br /> Glint Car Wash and Sonic Everett,Everett,Washington RGI Project No.2020-643-1 <br /> TABLE OF CONTENTS <br /> 1.0 INTRODUCTION 1 <br /> 2.0 PROJECT DESCRIPTION 1 <br /> 3.0 FIELD EXPLORATION AND LABORATORY TESTING 1 <br /> 3.1 FIELD EXPLORATION 1 <br /> 3.2 LABORATORY TESTING 2 <br /> 4.0 SITE CONDITIONS 2 <br /> 4.1 SURFACE 2 <br /> 4.2 GEOLOGY 2 <br /> 4.3 SoILs 2 <br /> 4.4 GROUNDWATER 3 <br /> 4.5 SEISMIC CONSIDERATIONS 3 <br /> 4.6 GEOLOGIC HAZARD AREAS 4 <br /> 5.0 DISCUSSION AND RECOMMENDATIONS 4 <br /> 5.1 GEOTECHNICAL CONSIDERATIONS 4 <br /> 5.2 EARTHWORK 5 <br /> 5.2.1 Erosion and Sediment Control 5 <br /> 5.2.2 Excavations 6 <br /> 5.2.3 Stripping and Site Preparation 6 <br /> 5.2.4 Structural Fill 7 <br /> 5.3 FOUNDATIONS 8 <br /> 5.4 RETAINING WALL 9 <br /> 5.5 SLAB-ON-GRADE CONSTRUCTION 10 <br /> 5.6 DRAINAGE 10 <br /> 5.6.1 Surface 10 <br /> 5.6.2 Subsurface 11 <br /> 5.6.3 Infiltration 11 <br /> 5.7 UTILITIES 11 <br /> 5.8 PAVEMENTS 11 <br /> 5.9 CEMENT TREATMENT 12 <br /> 6.0 ADDITIONAL SERVICES 14 <br /> 7.0 LIMITATIONS 15 <br /> LIST OF APPENDICES <br /> Figure 1 Site Vicinity Map <br /> Figure 2 Geotechnical Exploration Plan <br /> Figure 3 Retaining Wall Drainage Detail <br /> Figure 4 Typical Footing Drain Detail <br /> Appendix A Field Exploration and Laboratory Testing <br /> 11111 CorporateOffice17522 Bothell Way Northeast <br /> Bothell,Washington 98011 <br /> Phone 425.415.0551• Fax 425.415.0311 <br /> www.riley-group.com <br />