TranSystems Corporation - LGM Construction

1.0
TABLE OF CONTENTS
INTRODUCTION .................................................................................................. 1
1.1 PROJECT DESCRIPTION ................................................................................ 1
1.2 PURPOSE AND SCOPE OF SERVICES .......................................................... 1
2.0 FIELD EXPLORATION ........................................................................................ 3
2.1 GENERAL......................................................................................................... 3
2.2 DRILLING AND SAMPLING METHODS ........................................................... 3
2.3 DEPTH TO GROUNDWATER MEASUREMENTS............................................ 4
2.4 EXPLORATION, COMPLETION & ABANDONMENT ....................................... 4
3.0 LABORATORY TESTING.................................................................................... 5
4.0 GEOLOGIC AND SEISMIC SETTING ................................................................. 6
4.1 REGIONAL GEOLOGY..................................................................................... 6
4.2 LOCAL AND SITE GEOLOGY .......................................................................... 6
4.3 REGIONAL GROUNDWATER.......................................................................... 7
4.4 SEISMICITY...................................................................................................... 7
5.0 GENERAL SITE CONDITIONS............................................................................ 9
5.1 SITE DESCRIPTION......................................................................................... 9
5.1.1 Location and Topography.............................................................................. 9
5.1.2 Existing Asphalt Pavement............................................................................ 9
5.2 STRATIGRAPHY .............................................................................................. 9
5.2.1 Clayey Gravel Fill ........................................................................................ 10
5.2.2 Poorly Graded Hydraulically Placed Sand Fill ............................................. 10
5.2.3 San Antonio Formation Alluvium ................................................................. 10
5.3 GROUNDWATER ........................................................................................... 10
5.4 VARIATIONS IN SUBSURFACE CONDITIONS.............................................. 11
6.0 GEOLOGIC HAZARDS...................................................................................... 12
6.1 SEISMIC GROUND SHAKING........................................................................ 12
6.2 FAULT GROUND RUPTURE.......................................................................... 12
6.3 LIQUEFACTION ............................................................................................. 12
6.4 CYCLIC DENSIFICATION .............................................................................. 13
6.5 LATERAL SPREADING .................................................................................. 13
7.0 DISCUSSIONS AND CONCLUSIONS............................................................... 15
7.1 FOUNDATION TYPE ...................................................................................... 15
7.2 CORROSIVITY ............................................................................................... 16
8.0 RECOMMENDATIONS ...................................................................................... 17
8.1 EARTHWORK................................................................................................. 17
8.1.1 General........................................................................................................ 17
8.1.2 Site Preparation and Grading ...................................................................... 17
8.1.3 Excavation and Backfill................................................................................ 19
94240/1(OAK8R061)/es Page i of ii June 13, 2008
© 2008 Kleinfelder