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Soil Suitability Report BSK Job E21-002-01B <br />Cascade BESS Project August 26, 2021 <br />Stockton, California P a g e | iii <br />TABLE OF CONTENTS <br />1.INTRODUCTION AND PROPOSED DEVELOPMENT ...............................................................1 <br />1.1 Description of Site ................................................................................................................................. 1 <br />1.2 Description of Proposed Development ................................................................................................... 1 <br />1.3 Parcel Vicinity Location Map .................................................................................................................. 2 <br />1.4 Site Map ................................................................................................................................................ 2 <br />2.PRESENT AND PAST USES OF THE SITE ................................................................................2 <br />2.1 Potential Site Problem Assessment ........................................................................................................ 2 <br />3.EXISTING AND PROPOSED SPETIC TANK USAGE SECTION...................................................2 <br />3.1 Existing On-Site Septic Tank Usage ......................................................................................................... 2 <br />3.2 Site Septic Permit History ....................................................................................................................... 2 <br />3.3 On-Site Septic Tank Repair History ......................................................................................................... 3 <br />3.4 Existing Septic Tank Usage in the General Area ...................................................................................... 3 <br />3.5 General Area Septic Permit and Repair History ....................................................................................... 3 <br />3.6 Proposed Maximum Septic Tank Usage on Site ...................................................................................... 4 <br />4.GROUNDWATER INFORMATION .........................................................................................5 <br />4.1 Groundwater Description of General Area ............................................................................................. 5 <br />4.2 Potential Groundwater Contamination Issues ........................................................................................ 5 <br />4.3 Description of Constituents and Sample Location ................................................................................... 5 <br />4.4 Groundwater Sample Collection Process ................................................................................................ 5 <br />4.5 Groundwater Analytical Report .............................................................................................................. 6 <br />5.SOIL PROFILE INFORMATION ..............................................................................................6 <br />5.1 Field Exploration and Site Description .................................................................................................... 6 <br />5.2 Soil Lithology Description ....................................................................................................................... 6 <br />5.3 Soil Lithology Relating to Future Onsite Septic Uses ............................................................................... 6 <br />6.PERCOLATION TEST INFORMATION ....................................................................................7 <br />6.1 Percolation Test Hole Preparation Description ....................................................................................... 7 <br />6.2 Percolation Test Hole Post-Soak Description .......................................................................................... 7 <br />6.3 Percolation Test Description .................................................................................................................. 7 <br />6.4 Potential Predicted Problems ................................................................................................................. 7 <br />6.5 Percolation Testing Results .................................................................................................................... 7 <br />7.CONCLUSIONS .....................................................................................................................8 <br />8.LIMITATIONS .......................................................................................................................8 <br />9.REFERENCES ........................................................................................................................9