SHI Builders West Orange NJ Prelim GI SWM Report 1

REPORT OF PRELIMINARY GEOTECHNICAL AND STORMWATER BASIN AREA INVESTIGATION Proposed Residential Subdivision 2 & 10 Ridge Road Block 80.03, Lots 10 and 21 Township of West Orange, Essex County, New Jersey TABLE OF CONTENTS 1.0 EXECUTIVE SUMMARY .......................................................................... 1 2.0 PROJECT DETAILS ................................................................................. 1 3.0 SCOPE OF SERVICES ............................................................................... 2 3.1 Field Investigation..................................................................................................2 3.2 Laboratory Testing Program .....................................................................................3 4.0 SUMMARY OF SUBSURFACE CONDITIONS .............................................. 4 4.1 Site Geology .........................................................................................................4 4.2 United States Department of Agriculture (USDA) Web Soil Survey ...................................4 4.3 Subsurface Soil Profile.............................................................................................6 4.4 Seasonal High Groundwater and Groundwater .............................................................7 5.0 PRELIMINARY CONCLUSIONS AND RECOMMENDATIONS ...................... 7 5.1 General ................................................................................................................8 5.2 Preliminary Shallow Foundation Design Recommendations.............................................8 5.3 Preliminary Floor Slab Recommendations.................................................................. 10 5.4 Preliminary Earthwork Considerations ..................................................................... 10 5.5 Preliminary Pavement Recommendations .................................................................. 13 5.6 Preliminary Groundwater Considerations .................................................................. 14 5.7 Preliminary Retaining Walls and Lateral Earth

........................ 13 5.6 Preliminary Groundwater Considerations .................................................................. 14 5.7 Preliminary Retaining Walls and Lateral Earth Pressure Recommendations ...................... 14 5.8 Seasonal High Groundwater and Soil Permeability ...................................................... 16 5.9 Temporary Excavation .......................................................................................... 17 5.10 Preliminary Seismic and Liquefaction Considerations................................................... 17 5.11 Supplemental Evaluation and Investigation ................................................................ 17 6.0 GENERAL COMMENTS AND LIMITATIONS ............................................ 19 SHI Builders i 4266-99-001E