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^ CORNERSTONE ~ - -- <br />`7 EARTH GROUP <br />TABLE OF CONTENTS <br />SECTION 1:INTRODUCTION ......................................................................................................1 <br />1.1 Project Description -------------------------------------°-------------------------------------------------1 <br />1.2 Previous Studies -------------°----------------------------------------------------------------------------1 <br />1.2 Scope of Services--------------------------------------------------------°--------°°--°---.._.......---2 <br />1.3 Exploration Program .......................°•°----------------------------------------------------------2 <br />1.4 Laboratory Testing Program -..-----°-----------------------------------------------------------------2 <br />1.5 Corrosion Evaluation ---°--°-----°---._...--°---------------------------------------------------------2 <br />1.6 Environmental Services-----------------------------------°--------°-----------------------------------3 <br />SECTION 2: REGIONAL SETTING ..............................................................................................3 <br />2.1 Regional Seismicity -°------------------------------------------------------------------------°---------- 3 <br />Table 1: Approximate Fault Distances ...................................................................................3 <br />SECTION 3: SITE CONDITIONS ..................................................................................................3 <br />3.1 Surface Description ---------------------------°-------------•----------------°-------------------------- 3 <br />3.2 Subsurface Conditions---------------------------------°°----------------------------------------------4 <br />3.2.1 Plasticity/Expansion Potential ...................................................................................5 <br />3.2.2 In-Situ Moisture Contents ...........................................................................................5 <br />3.3 Ground Water------------------------------------------------------------------------------------------------ 5 <br />SECTION 4: GEOLOGIC HAZARDS ............................................................................................5 <br />4.1 Fault Rupture---------------------------------------°-------------------------------------------------------5 <br />4.2 Estimated Ground Shakin9 ----------------------------------------------------------------------------- (i <br />4.3 Liquefaction Potential ------------------------------------------------°---------------------------------- 6 <br />4.4 Seismic Settlement/Unsaturated Sand Shaking--------------------------------------------------6 <br />4.5 Lateral Spreading -°--------------------°----------------------------------------------------------------- 7 <br />4.6 Quarry Slope Stability ------°--°°°°----°---------------------------°---------------------------°-- 7 <br />4.6.1 Summary of Conditions ..............................................................................................7 <br />Ponderosa Active Adult Community Page i <br />132-2-1 <br />