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TABLE OF CONTENTS <br /> SOIL SUITABILITY STUDY.............................................................................................1 <br /> Introduction.................................................................................................................1 <br /> Proposed Development..............................................................................................1 <br /> SiteDescription...........................................................................................................1 <br /> Existing and Proposed Septic Tank Usage..............................................................2 <br /> ExistingSeptic System...................................................................................2 <br /> Proposed Septic System................................................................................2 <br /> On-Site Septic Permit History.........................................................................2 <br /> Existing Septic Tank Usage in the Vicinity.....................................................2 <br /> Septic Permit History in the Vicinity................................................................2 <br /> Ground Water Information .........................................................................................3 <br /> Depthand Gradient........................................................................................3 <br /> Potential Ground Water Contamination Issues..............................................3 <br /> On-Site Wells..................................................................................................4 <br /> WaterSample.................................................................................................4 <br /> Soil Profile and Geologic Information.......................................................................5 <br /> SoilBorings ....................................................................................................5 <br /> Discussion of Soil Lithology............................................................................6 <br /> PercolationTest..........................................................................................................6 <br /> Preparation and Presaturation of Percolation Test Holes..............................6 <br /> Percolation Test Procedure............................................................................6 <br /> Percolation Test Results ................................................................................ 7 <br /> Discussion of Percolation Test Results.......................................................... 7 <br /> Discussion of Septic System Sizing...............................................................8 <br /> NITRATE LOADING STUDY...........................................................................................9 <br /> Mass Transport Soil Properties.................................................................................9 <br /> Sourcesof Nitrate.....................................................................................................10 <br /> Percolating Recharge Waters..................................................................................10 <br /> Recharge Scenario 1 — CIMIS Ripon & Holt Stations .................................. 10 <br /> Recharge Scenario 2— CIMIS and WRCC Tracy Pumping Plant Stations.. 11 <br /> Qualityof Rainwater.................................................................................................11 <br /> Quantity and Quality of Domestic Wastewater......................................................11 <br /> Denitrification Reductions.......................................................................................12 <br /> Nitrate Loading Estimate..........................................................................................12 <br /> Discussion of Nitrate Loading Results...................................................................13 <br /> TotalNitrate Impact...................................................................................... 13 <br /> CONCLUSIONS AND RECOMMENDATIONS..............................................................15 <br /> LIMITATIONS.................................................................................................................17 <br /> SELECTED REFERENCES...........................................................................................18 <br /> LOGE 20-05 <br />