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Soil Suitability and Nitrate Loading Study <br />MCDONALD ISLAND STATION <br />2121 Zuckerman Road, Stockton, California 95202 <br /> <br />TABLE OF CONTENTS <br /> <br /> <br />SECTION PAGE <br /> <br />1.0. INTRODUCTION AND PROPOSED DEVELOPMENT ......................................... 1  <br />1.1. DESCRIPTION OF SITE .................................................................................... 1  <br />1.2. DESCRIPTION OF PROPOSED DEVELOPMENT ........................................... 2  <br />1.3. PARCEL VICINITY LOCATION MAP ................................................................. 2  <br />1.4. SITE MAP .......................................................................................................... 2  <br />2.0. PRESENT AND PAST USAGE OF SITE .............................................................. 2  <br />2.1 POTENTIAL SITE PROBLEM ASSESSMENT .................................................. 3  <br />3.0. EXISTING AND PROPOSED SEPTIC TANK USAGE ......................................... 3  <br />3.1. EXISTING ON-SITE SEPTIC TANK USAGE ..................................................... 3  <br />3.2. SITE SEPTIC PERMIT HISTORY ...................................................................... 3  <br />3.3. ON-SITE SEPTIC TANK REPAIR HISTORY ..................................................... 4  <br />3.4. EXISTING SEPTIC TANK USAGE IN THE GENERAL AREA ........................... 4  <br />3.5. PROPOSED MAXIMUM SEPTIC TANK USAGE ON SITE ............................... 4  <br />4.0. GROUNDWATER INFORMATION - REGIONAL HYDROGEOLOGY ................. 4  <br />4.1. GROUNDWATER DESCRIPTION FOR THE GENERAL AREA ....................... 5  <br />4.2. GROUNDWATER CONTAMINATION IN THE AREA OF THE SITE ................. 5  <br />4.3. ON-SITE EXISTING WELL DESCRIPTION ....................................................... 5  <br />5.0. SOIL PROFILE ..................................................................................................... 5  <br />5.1. SOIL PROFILE PIT INCLUDING DEPTH AND DIMENSIONS .......................... 6  <br />5.2. SOIL LITHOLOGY AS RELATED TO FUTURE ONSITE SEPTIC USES .......... 6  <br />6.0. PERCOLATION TEST INFORMATION ................................................................ 6  <br />6.1. NUMBER OF PERCOLATION TESTS PERFORMED ....................................... 6  <br />6.2. CONSTRUCTION OF PERCOLATION TEST HOLE ......................................... 7  <br />6.3. DESCRIPTION OF THE PERCOLATION TEST HOLE - POST SOAK ............. 7  <br />6.4. PERCOLATION TEST CONFORMED TO SJC POLICY EHD 98-02 ................ 7  <br />6.5. COMPLETED PERCOLATION TEST FORM ..................................................... 8  <br />6.6. PERCOLATION TEST FINDINGS ..................................................................... 8  <br />7.0. CHEMICAL AND PHYSICAL PROPERTIES OF SOIL ........................................ 8  <br />7.1. CHEMICAL AND PHYSICAL PROPERTIES OF SITE SOILS ........................... 8  <br />7.2. MASS TRANSPORT PROPERTIES OF UNDERLYING SITE SOILS ............... 8  <br />8.0. GROUNDWATER ANALYSIS .............................................................................. 9  <br />8.1. DESCRIPTION OF LOCAL GROUNDWATER .................................................. 9  <br />8.2. EXISTING OR POTENTIAL GROUNDWATER CONTAMINATION .................. 9  <br />8.3. CURRENT AND FUTURE USE OF GROUNDWATER AT THE SITE ............... 9